JB/T 5934-1991 Technical requirements for door locks for construction machinery
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T5934-1991
Engineering Machinery Door Locks
Published on December 12, 1991
Technical Conditions
Implementation on July 1, 1992
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Engineering Machinery Door Locks
1 Subject Content and Scope of Application
Technical Conditions
JB/T5934-1991
This standard specifies the terminology, technical requirements, test methods, inspection rules and their marking, packaging, transportation and storage of engineering machinery door locks (hereinafter referred to as door locks).
This standard applies to engineering machinery door locks.
2 Reference standards
GB2828
GB2829
GB2423.17
3 Terms
3.1 Reed lock
Batch inspection counting sampling procedure and sampling table Periodic inspection counting sampling procedure and sampling table Basic environmental test procedures for electrical and electronic products Test Ka: Salt spray test method
Packaging storage and transportation graphic signs
Engineering machinery door lock with square and oblique lock tongue. 3.2 Hook lock
Engineering machinery door lock with hook-shaped lock tongue. 3.3 Lock tongue
Parts in the door lock that directly play a locking role. In this standard, the lock tongue of the reed lock is called oblique tongue, and the lock tongue of the hook reed lock is called hook tongue. 3.4 Internal locking mechanism
General term for parts that lock the door inside the door. 3.5 External locking mechanism
General term for the parts that lock the door from the outside. 3.6 Full locking function
When the door is fully closed, the internal and external locking mechanisms are used to lock the door. At this time, the door cannot be opened by the external handle without the key. 3.7 Half locking function
The door can still be fully closed without the internal and external locking mechanisms, but the door can still be opened by the external handle. 3.8 Lock box (column or plate)
The box (column or plate)-shaped part that buckles the lock tongue when the door is closed. 3.9 Pin lock structure
A group of parts with a basic cylindrical shape that can lock or release the movement of the lock cylinder. 3.10 Blade lock structure
A group of parts with a basic sheet shape that can lock or release the movement of the lock cylinder. 3.11 Handle
A part that drives the lock tongue to open when twisted by external force, and can reset itself when the external force is removed. This standard is divided into two types: internal handle and external handle. Approved by the Ministry of Machinery and Electronics Industry on December 12, 1991 and implemented on July 1, 1992
3.12 Confidentiality
The reliability of the lock's confidentiality performance. 3.13 Durability
The service life of the lock.
3.14 Firmness
The degree to which the lock can resist external force damage. 3.15 Flexibility
The sensitivity of the lock when in use.
3.16 Mutual opening
JB/T5934-1991
The phenomenon that one can open another lock with one's own key. 3.17 Tooth
Arranged on the key into a group of teeth with different heights. 3.18 Number of teeth
The total number of keys with different teeth in a batch. 4 Technical requirements
4.1 Door locks shall comply with the requirements of this standard and be manufactured in accordance with drawings and technical documents approved by the prescribed procedures. 4.2 Confidentiality
4.2.1 The number of different teeth of keys in each group shall not be less than 200. The mutual opening rate shall not be greater than 2%. When the ordering party has special requirements, it shall be implemented in accordance with the relevant provisions of the agreement between the two parties. 4.2.2
4.2.3 Door locks must have two functions: half lock and full lock. 4.2.4 The outer end of the lock cylinder shall be equipped with a dustproof device. 4.3 Durability
4.3.1 The service life of the key shall not be less than 30,000 times. 4.3.2 The service life of the lock tongue shall not be less than 30,000 times. 4.3.3 The locking mechanism shall ensure normal operation for no less than 30,000 times. 4.4 Firmness
4.4.1 The lock body riveted parts shall be firm and free of looseness, and all riveted joints shall be smooth and round. 4.4.2 When the lock body and the lock box (plate or column) are in the fully locked state, the lock body shall not be deformed when subjected to a lateral load (door opening and closing direction) of 3000N.
4.5 Flexibility
4.5.1 The key shall be inserted into and removed from the lock cylinder smoothly and naturally, and the rotation of the lock cylinder shall be flexible and free of sticking. 4.5.2 If the door lock cylinder is a pin lock structure, there shall be no pin sound when the lock head is shaken after the key is removed. 4.5.3 The static pulling force of the key removal shall not exceed 9.8N. When the door lock is opened with the handle, the lock tongue shall move flexibly, and the moving part and the spring coil shall be coated with grease. 4.5.4
4.5.5 The axial static pressure that the lock tongue can withstand shall comply with the provisions of Table 1. When the door lock is in the semi-locked state, when the lock tongue is subjected to force pressure, the lock tongue and the lock body should not have significant displacement, and the door lock should be ensured to be in the semi-locked state; when the lock tongue is subjected to the maximum pressure P, the lock tongue should be in the position when the door lock is fully opened.
Axial initial static pressure Pl
Axial final static pressure P:
80~150
4.6 Appearance
JB/T5934-1991
4.6.1 The appearance of the lock should be beautiful, and the components should not have missing corners, fragments, rust, and exposed surfaces should not have sharp edges or sharp edges. 4.6.2 The black metal parts of the door lock should have anti-rust measures (excluding oiling treatment). 4.6.3 The coating surface of the oil-splashed parts of the door lock should be smooth and bright, with uniform color. The main outer surface should not have obvious bubbles, flow marks, slip, cracks, and particles. Slight accumulation and hanging speed are allowed. 4.6.4 The surface of the electroplated parts of the door lock should be smooth and dense, with uniform color. There should be no defects such as peeling, leakage, pinholes, bubbling, yellowing, scratches, etc. 4.6.5 The key should be flat, smooth, and free of obvious ripples, missing corners, and damage. The lines of the trademark characters are clear. 4.7 After the electroplated parts of the door lock are subjected to the salt test, the rust spots and rust marks on the outer surface of the plating layer shall be less than 2mm", and shall not exceed 3 points, and shall not be concentrated within 20mm×20mm.
4.8 When the door lock is in the fully locked or half-locked state, the distance L between the inclined tongue and the lock body is ≥17mm, and the distance L between the most concave part of the hook tongue and the lock body is ≤17mm; when the door lock is in the fully opened state, the distance L between the inclined tongue and the lock body is ≤1.5mm, and the distance between the most convex part of the hook tongue and the lock body should be greater than or equal to 20mm (see Figures 1 and 2). 5 Test method||t t||5.1 Confidentiality test
5.1.1 The mutual opening rate test is carried out according to the following provisions: a. Check the company's tooth pattern book to see if the number of different tooth patterns in each group reaches 200 and the reasonable arrangement of different tooth patterns. b. In each group of 200 locks with different tooth patterns, take 8 locks and arrange them, and try to open them one by one. You can first use one key to try to open the other 7 locks in turn, and then use the key of the second lock to try to open the other 7 locks in turn.., and so on, until all are opened. One mutual opening is allowed during the mutual opening.
c. Mutual opening rate calculation formula:
X = R/LT(-1)) × 100
In the formula; X is the mutual opening rate, %;
R——the number of mutual openings;
T is the number of random inspections.
d: Technical requirements and test methods for mutual opening: Open the door in a cycle without the same number. Number the keys before mutual opening, then pull out the keys, mess up the order of the keys, and redistribute a number of keys and door locks to each person. When mutual opening is performed, the number must be reported. During mutual opening, the inspector is not allowed to use technical means to open the door lock. Only the keys of 8 locks are allowed to try to open a number of door locks specified by themselves, and they are not allowed to leave their posts to open the door locks of others. 5.1.2 Check whether the door lock has the two position functions of half lock and full lock, and when the inner locking mechanism or the outer locking mechanism is in the full lock state, turning the outer handle cannot open the lock. 5.1.3 Check the door lock in person. The outer end of the lock core should have a dustproof device. When no key is inserted, the lock core hole should Completely blocked by the dustproof sheet, dust is not easy to enter the lock core hole.
5.2 Durability test
The durability test must be carried out at a speed of 20 to 25 times/min under the condition of continuous testing for no less than 4 hours. A small amount of lubricant is allowed to be added before the test. Cleaning and lubricant can be added once every 10,000 times. If there is no testing machine, it can be replaced by manual work. 5.2.1 Key service life test
Insert the key into the lock core, rotate the lock core 180°, and then pull out the key once. The key can still be used after 30,000 times. 5.2.2 Lock tongue service life test
After locking the lock tongue to the lock box (plate or column), open it with the handle once. The test reaches 30,000 times and the lock tongue can still be used.
5.2.3 Locking mechanism test
The external locking mechanism test is the same as that in Section 5.2.1. The inner locking mechanism is tested by the inner handle reciprocating switch locking mechanism. After 30,000 times, the locking mechanism can still be used.
JB/T5934-1991
5.3 Firmness test
5.3.1 When opening or locking the door lock with the handle, observe whether the riveted parts of the lock body are loose, and check whether the riveted parts are smooth and round. 5.3.2 Transverse load test
Fix the lock body on the test machine, apply a load of 3000N on the oblique tongue or hook tongue along the direction of door opening and closing (as shown in Figures 1 and 2), remove the load after 6s, and then check whether the parts of the lock body are deformed. 5.4Flexibility test
5.4.1 Test 4.5.1 by hand feel method. Hold the key and turn it along the lock core. The key can be smoothly inserted into the key slot of the lock core. The lock core should be flexible and without any sticking feeling when turning the key. When opening or locking the door lock, the key can be smoothly pulled out in the reset state. 5.4.2 After pulling out the key from the pin structure door lock, shake the door lock to see if there is any pin sound. 5.4.3 Static tensile test of key pulling out
Fix the door lock on the tensioner. At this time, the key should be vertically downward. Use a 1000g weight to hang in the hole at the tail of the key. The key should be smoothly pulled out of the lock core hole.
5.4.4 In the semi-locked state, turn the inner and outer handles by hand to open the door lock. Check whether the lock tongue moves flexibly without any sticking phenomenon. Check whether the moving part of the door lock and the spring coil are coated with grease as required. 5.4.5 Lock tongue force test
Fix the lock body on the testing machine and apply load along the axial direction of the lock tongue movement, as shown in Figures 1 and 2. When the lock tongue is tested according to the force value in Table 1, check whether the lock tongue and the lock body have significant displacement and whether the half-locked state of the door lock is destroyed; when the lock tongue is tested according to the maximum value of P in Table 1, check whether the lock tongue is in the position when the door lock is fully opened. 5.5 According to the provisions of Articles 4.6.1 to 4.6.5, check in turn whether the requirements of each article are met. 5.6 The salt spray test of electroplated parts shall be carried out in accordance with the standard provisions of GB2423.17 Test Ka. The test time shall not be less than 24h. After the test, the metal rust on the main outer surface coating of the electroplated parts shall be less than 2mm, and shall not exceed 3 points, and shall not be concentrated within the range of 20mm×20mm. 5.7 Use a vernier caliper (0.125mm, scale value 0.02mm) to check whether the distance from the lock tongue to the lock body meets the requirements of Article 4.8 when the door lock is in the fully locked or half-locked state and when the door lock is in the fully opened state. Moulding pressure
Directional pressure
Figure 1 Schematic diagram of tongue lean lock
Axial pressure
Figure 2 Schematic diagram of hook spring lock
Inspection rules
Inspection classification
The inspection of door locks is divided into factory inspection and type test. 6.2
Factory inspection
JB/T5934-1991
6.2.1 Products can only be shipped after being inspected and qualified by the inspection department of the manufacturer, and should be accompanied by a quality inspection certificate and instruction manual. 6.2.2
Product factory inspection is divided into two types: mandatory inspection items and factory sampling inspection items. The mandatory inspection items for products before leaving the factory include items 1 to 7 in Table 2. The random inspection items for products before leaving the factory include items 1 to 11 in Table 2. Table 2
Inspection items
Function of locking mechanism
Dustproof device
Exposed size of lock tongue
Flexibility of key insertion and extraction
Shaking of ball
Flexibility of handle opening
Firmness of lock body connection
Interoperability
Static pulling force when key is pulled out
Force of lock tongue
Service life of key
Service life of lock tongue
Service life of locking mechanism
Transverse load
Salt spray test for electric chain
Technical requirements
4.6.1~4.6.5
4.2.1,4.2.2
Note: The items marked with *V\ in the table are considered unqualified if they do not meet the requirements of this standard.
Test method
Unqualified classification
6.2.5 The sampling method for product factory inspection adopts the secondary sampling plan specified in GB2828. The discrimination level 1 is used, and the batch range is 51~90. The specific plan is shown in Table 3.
Unqualified classification
Sampling times
First time
Second time
First time
Second time
In the table, n represents the sample size, AQL represents the qualified quality level, A represents the qualified judgment number, and R represents the unqualified judgment number. Type test
6.3.1 The door lock shall be subjected to type test if any of the following conditions exist:5
JB/T5934-1991
Trial production and identification of new products or old products transferred to the factory for production; After normal production, if there are major changes in structure, materials, and processes that may affect product performance; During normal production, at least once a year; When the product is stopped for more than half a year and then resumed; When there is a significant difference between the factory inspection results and the last type test: When the national quality supervision agency proposes a type test requirement. 6.3.2. The items of type test include all the inspection items specified in this standard. The items and the classification of unqualified items are shown in Table 2. 6.3.3 The sampling method of type test adopts the secondary sampling plan specified in GB2829. Use discrimination level 1. The specific plan is shown in Table 4. Table 4
Classification of non-conformity
Number of sampling
First time
Second time
First time
Second time
In the table, n represents the sample size, RQL represents the non-conformity quality level, A. represents the number of qualified judgments, and R. represents the number of unqualified judgments. 6.3.4 Samples for type test shall be randomly selected from the products submitted for factory inspection. 6.3.5 If the type test is qualified, the batches of the representative group produced in this cycle that have passed the random inspection can be put into storage or shipped as qualified products.
6.4 Acceptance
6.4.1 The acceptance inspection items include the contents of items 1 to 11 in Table 2. 6.4.2 The sampling method for acceptance inspection is the same as the sampling method for product factory inspection in Article 6.3.4. 6.4.3 If the acceptance inspection is qualified, the batches of the representative group that have passed the random inspection of this acceptance shall be delivered to the ordering party as qualified products. However, products that have undergone type tests shall not be delivered to ordering parties as qualified products. 7 Marking, packaging, transportation, storage
7.1 Marking, packaging
7.1.1 There should be a durable nameplate in a conspicuous position on the product, and the following contents should be clearly marked: a.
Manufacturer name;
Product name;
Registered trademark;
d. Product model or mark.
7.1.2 The inner packaging of the product is boxed, and the packaging box should be clean and dry, and the decoration should be beautiful. When the product is placed in the box, it should be protected against moisture and corrosion. Each inner package is only allowed to contain one pair (or one) of products, with complete accessories and no missing parts, and should contain product certificates, product manuals, etc. The outer surface of the inner package should be marked with the following items: a.
Manufacturer name;
Product name;
Registered trademark;
Product model or mark;
Product quality grade mark;
Manufacturing date (or production batch number).
7.1.3 The outer package of the product shall be boxed. The box shall be firm, dry, non-corrosive, and adopt moisture-proof protection measures to ensure that the product can be kept in a safe place. -1991
Under normal transportation and storage conditions, the product will not be damaged due to vibration, loading and unloading, moisture and immersion in corrosive substances. The outer surface of the packing box should be clearly marked with the following contents:
Manufacturer name;
Product name;
Registered trademark;
Product model or mark;
Product quality grade mark;
Factory date or production batch number;
Outer dimensions of the packing box
Length×width×height (mm)
and printed with words or patterns such as *Handle with care”, “Do not place”, and “Moisture-proof\”. The case should comply with the relevant provisions of Taiwan (B191. 7.2 Transportation and storage
7.2.1 During transportation and storage, the product should be strictly prohibited from being exposed to rain and snow, moisture, inversion, and collision. 7.2.2 The product should be stored in a ventilated dry coal warehouse without opening the original packaging. The bottom packaging box should be 0.3m away from the ground and the total stacking height should not exceed 1.8m.
7.2.3 Storage environment conditions:
Temperature -20~+40℃:
Relative humidity less than 85%:
No corrosive gas around; bzxZ.net
The environment is dry and well ventilated
7.2.4 Under the storage environment conditions specified in this standard, the storage shelf life is two years. Additional remarks:
This standard was proposed and managed by Tianjin Engineering Machinery Research Institute. This standard was jointly drafted by Tianjin Engineering Machinery Research Institute and Xuzhou Lock Factory. The main drafters of this standard are Chen Junhua, Liu Xiqi and Wang Zhaoling. 7
People's Republic of China
Mechanical Industry Standard
Technical Specifications for Door Locks of Construction Machinery
JB/T 5934 - 1991
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet 3/4
Word Count 14,000
First Printing in March 1992
First Edition in March 1992
Print Quantity 1-500
Price 10.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn16616
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