Universal fixture and tensile testing machine for lock tension
By designing a universal fixture for lock tensile testing suitable for U-locks and bar locks, the problem of high complexity in lock testing in existing technologies has been solved, and the universality and efficient operation of lock tensile testing have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DELI TOOLS CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-03
AI Technical Summary
Existing lock tensile testing requires metal rod clamps of various specifications, resulting in a complex, costly, and inefficient testing process that cannot effectively meet the testing needs of different types of locks.
A universal fixture for testing the tensile strength of locks was designed, including a detachable first bracket, a second bracket, a square bar, and a round bar. It can accommodate the fixing of U-locks and bar locks. By adjusting the combination of the square bar and the round bar, different locks can be fixed, simplifying the operation process.
It achieves universality and ease of operation in lock tensile testing, significantly reduces testing complexity, improves testing efficiency, and reduces manpower and time costs.
Smart Images
Figure CN224456360U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lock manufacturing technology, and in particular relates to a universal fixture and tensile testing machine for lock tensile testing. Background Technology
[0002] Locks may be subjected to various external forces during normal use (such as impact, pulling, prying, etc.). Tensile testing can effectively simulate these extreme stress scenarios, verify the structural integrity and functional reliability of key components such as the lock body, bolt, and shank under specified loads, and ensure that the product meets safety performance requirements. In existing technical solutions, lock tensile testing usually requires fixing the sample on a special fixture first, and then installing the fixture as a whole into a tensile testing machine for testing.
[0003] According to the standard "Bicycle Locks" (QB1001-2006), there are significant differences in the static tensile strength test requirements for two commonly used bicycle locks: U-locks require a square metal rod and either one or two round metal rods to be fixed to the tensile strength testing machine; while bar locks require two round metal rods. This difference necessitates the use of various sizes of metal rod clamps during testing, requiring frequent disassembly and replacement to accommodate the testing needs of different lock types. This not only increases the complexity of the testing process and extends the testing cycle but also significantly increases labor and time costs, thus hindering the overall efficiency of lock testing.
[0004] Therefore, there is an urgent need for a universal fixture and tensile testing machine for locks to solve the above problems. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a universal fixture and tensile testing machine for locks, which can be applied to different types of locks, and the locks are easy to install, which significantly reduces the operational complexity of lock tensile testing and improves the efficiency of lock tensile testing.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] On the one hand, a universal fixture for testing the tensile strength of locks is provided, including:
[0008] The first and second supports are arranged at intervals along the test direction;
[0009] The lock comprises a square bar, at least one first round bar, and at least one second round bar. The square bar and the first round bar are detachably connected to the first bracket, and a first test port for one end of the lock to pass through is formed between the square bar or the first round bar and the first bracket. The second round bar is detachably connected to the second bracket, and a second test port for the other end of the lock to pass through is formed between the second round bar and the second bracket.
[0010] Optionally, the first bracket is provided with square holes and a first circular hole arranged at intervals along a first direction, the square rod can pass through the square hole, and the first circular rod can pass through the first circular hole.
[0011] Optionally, the second bracket is provided with a second circular hole, through which the second circular rod can pass.
[0012] Optionally, the first support includes a first U-shaped arm, and the second support includes a second U-shaped arm, with the openings of the first U-shaped arm and the second U-shaped arm facing each other. A square rod and a first round rod can pass through both ends of the first U-shaped arm, and a second round rod can pass through both ends of the first U-shaped arm.
[0013] Optionally, a first test port is formed between a square rod and a first support, the square rod having a square cross-section, and at least one second circular rod having the same diameter as the side length of the square rod.
[0014] Optionally, when multiple first circular rods and multiple second circular rods are provided, one of the multiple first circular rods can form a first test port with the first bracket, and one of the multiple second circular rods can form a second test port with the second bracket. The multiple first circular rods have different diameters, and the multiple second circular rods have different diameters.
[0015] Optionally, at least one of the first circular bars has the same diameter as one of the plurality of second circular bars.
[0016] Optionally, the first circular bar, the second circular bar, and / or the square bar are provided with a blocking part, which can contact the first support and the second support.
[0017] On the other hand, a tensile testing machine is provided, including a tensile testing machine body and the aforementioned universal clamp for lock tensile testing, wherein the first bracket and the second bracket of the universal clamp for lock tensile testing are detachably mounted on the tensile testing machine body.
[0018] Optionally, the tensile testing machine also includes a first fastener and a second fastener. The first bracket is provided with a first connecting hole, through which the first fastener can pass and connect to the tensile testing machine body. The second bracket is provided with a second connecting hole, through which the second fastener can pass and connect to the tensile testing machine body.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0020] This invention provides a universal fixture and tensile testing machine for lock tensile forces. When testing the static tensile force of a U-lock, the first test port can be formed between the square bar and the first support, or between the first circular bar and the first support. The lock body of the U-lock passes through the first test port, and the lock beam passes through the second test port, thus fixing the U-lock on the universal fixture. When testing the static tensile force of a bar lock, the first test port is formed between the first circular bar and the first support. The lock body of the bar lock passes through both the first and second test ports, thus fixing the bar lock on the universal fixture. This design not only makes operation convenient and quick, but also allows the universal fixture for testing lock tensile forces to be used for fixing both U-locks and bar locks, expanding its versatility. Furthermore, when testing different types of locks using the universal lock tensile testing fixture provided in this embodiment, only the square bar, the first circular bar, and the second circular bar need to be adjusted. There is no need to repeatedly change the fixture on the tensile testing machine to adapt to the specifications and types of locks, which significantly reduces the operational complexity of lock tensile testing and improves the efficiency of lock tensile testing. Attached Figure Description
[0021] Figure 1 A schematic diagram showing the installation of the universal clamp for testing the tensile strength of locks provided by this utility model on the tensile testing machine body;
[0022] Figure 2 This is a schematic diagram of the structure of the universal clamp for testing the tensile strength of locks provided by this utility model;
[0023] Figure 3 A first plan view of a U-lock installed in the universal clamp for testing the tensile strength of locks provided in this utility model;
[0024] Figure 4 A second plan view of the U-lock installed in the universal clamp for testing the tensile force of locks provided in this utility model;
[0025] Figure 5 A plan view of a bar lock installed in the universal clamp for testing the tensile strength of locks provided by this utility model;
[0026] Figure 6 Side views of the first and second brackets of the universal clamp for testing lock tensile force provided by this utility model;
[0027] Figure 7 This is a front view of the universal clamp for testing the tensile strength of locks provided by this utility model.
[0028] in:
[0029] 101. Lock body; 102. Lock beam;
[0030] 200. Tensile testing machine body;
[0031] 1. First bracket; 11. First circular hole; 12. Square hole; 13. First connecting hole; 14. First test port;
[0032] 2. Second bracket; 21. Second circular hole; 22. Second connecting hole; 23. Second test port;
[0033] 3. Square rod;
[0034] 4. The first circular rod;
[0035] 5. The second circular rod;
[0036] 6. Blocking section. Detailed Implementation
[0037] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0038] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0040] Example 1
[0041] like Figures 1 to 7 As shown in the figure, this embodiment provides a universal fixture for lock tensile testing, which can be applied to different types of locks and is easy to install, significantly reducing the operational complexity of lock tensile testing and improving the efficiency of lock tensile testing.
[0042] See Figure 2 The universal fixture for testing the tensile strength of locks includes a first bracket 1, a second bracket 2, a square bar 3, at least one first circular bar 4, and at least one second circular bar 5. The first bracket 1 and the second bracket 2 are aligned along the testing direction. Figure 2 The lock is arranged at intervals in the X direction. Square rods 3 and first circular rods 4 are detachably connected to the first bracket 1, and a first test port 14 is formed between the square rod 3 or the first circular rod 4 and the first bracket 1 for one end of the lock to pass through. Second circular rods 5 are detachably connected to the second bracket 2, and a second test port 23 is formed between the second circular rod 5 and the second bracket 2 for the other end of the lock to pass through. The test direction is the direction of the tensile force experienced by the lock during the test.
[0043] The universal fixture for testing the tensile strength of locks provided in this embodiment allows for various applications. When testing the static tensile strength of a U-shaped lock, the first test port 14 can be formed between the square rod 3 and the first support 1, or between the first circular rod 4 and the first support 1. The lock body 101 of the U-shaped lock passes through the first test port 14, and the lock beam 102 passes through the second test port 23, thus securing the U-shaped lock to the fixture. When testing the static tensile strength of a bar lock, the first test port 14 is formed between the first circular rod 4 and the first support 1. The lock body 101 of the bar lock passes through both the first test port 14 and the second test port 23, thus securing the bar lock to the fixture. This design not only makes operation convenient and quick but also allows the universal fixture for testing the tensile strength of locks provided in this embodiment to be applicable to both U-shaped and bar locks, expanding its versatility. Furthermore, when testing different types of locks using the universal lock tensile testing fixture provided in this embodiment, only the square bar 3, the first circular bar 4, and the second circular bar 5 need to be adjusted. There is no need to repeatedly change the fixture on the tensile testing machine to adapt to the specifications and types of locks, which significantly reduces the operational complexity of lock tensile testing and improves the efficiency of lock tensile testing.
[0044] Specifically, see Figure 2 The square rod 3 and the first circular rod 4 are simultaneously mounted on the first bracket 1. The square rod 3 and the first circular rod 4 are spaced apart along the test direction on the first bracket 1, with the square rod 3 located on the side of the first circular rod 4 facing the second bracket 2. The first test port 14 is formed by the first bracket 1 and the square rod 3 or the first bracket 1 and the first circular rod 4, and the first test port 14 formed by the square rod 3 and the first bracket 1 partially overlaps with the first test port 14 formed by the first circular rod 4 and the first bracket 1. When multiple second circular rods 5 are provided, one of the multiple second circular rods 5 can form a second test port 23 with the second bracket 2, and the second test ports 23 formed by different second circular rods 5 and the second bracket 2 will also partially overlap.
[0045] Optionally, see Figure 2 and Figure 3The first test port 14 is formed between the square rod 3 and the first support 1. The cross-sectional shape of the square rod 3 is square, and the diameter of at least one second circular rod 5 is the same as the side length of the square rod 3.
[0046] For example, when the side length of the square bar 3 is 25mm and the diameter of the second circular bar 5 forming the second test port 23 with the second bracket 2 is 25mm, the U-lock can be fixed to the universal clamp for lock tensile testing. The lock body 101 of the U-lock can fit against the surface of the square bar 3, and the lock beam 102 of the U-lock can fit against the second circular bar 5.
[0047] Optionally, see Figure 2 and Figure 4 When multiple first circular rods 4 and multiple second circular rods 5 are provided, one of the multiple first circular rods 4 can form a first test port 14 with the first bracket 1, and one of the multiple second circular rods 5 can form a second test port 23 with the second bracket 2. The diameters of the multiple first circular rods 4 and the multiple second circular rods 5 are different to accommodate the testing of different types of locks.
[0048] In this embodiment, see Figure 2 and Figure 4 At least one of the first circular rods 4 has the same diameter as one of the plurality of second circular rods 5.
[0049] For example, when the diameter of the first circular rod 4 forming the first test opening 14 with the first bracket 1 is 20mm, and the diameter of the second circular rod 5 forming the second test opening 23 with the second bracket 2 is 20mm, the U-lock can be fixed to the universal fixture for lock tensile testing. The lock body 101 of the U-lock can fit against the surface of the first circular rod 4, and the lock beam 102 of the U-lock can fit against the second circular rod 5. When the diameter of the first circular rod 4 forming the first test opening 14 with the first bracket 1 is 25mm, and the diameter of the second circular rod 5 forming the second test opening 23 with the second bracket 2 is 25mm, the bar lock can be fixed to the universal fixture for lock tensile testing. The lock beam 102 of the bar lock is wound around the first circular rod 4 and the second circular rod 5, and fits against the first circular rod 4 and the second circular rod 5.
[0050] Optionally, see Figure 2 and Figure 6 The first bracket 1 is provided with square holes 12 and first circular holes 11 spaced apart along a first direction, the first direction referring to... Figure 2 In the opposite direction of X, the square rod 3 can pass through the square hole 12, and the first circular rod 4 can pass through the first circular hole 11, thus realizing the installation of the square rod 3 and the first circular rod 4 on the first bracket 1, and making disassembly convenient.
[0051] Specifically, see Figure 6In the orientation, the square hole 12 is located on the side of the first circular hole 11 near the second bracket 2.
[0052] For example, the square hole 12 is a square with a side length of 25mm, and there are two first circular holes 11. One first circular hole 11 has a diameter of 25mm and the other first circular hole 11 has a diameter of 20mm. The smaller diameter first circular hole 11 is located on the side of the larger diameter first circular hole 11 that is away from the square hole 12.
[0053] In some embodiments, to facilitate the lock passing through the first test port 14 and the second test port 23, the unused square rod 3, the first circular rod 4, and / or the second circular rod 5 can be removed from the first bracket 1 or the second bracket 2. For example, when the first test port 14 is formed between the square rod 3 and the first bracket 1, the unused first circular rod 4 can be removed from the first circular hole 11; when the first test port 14 is formed between the first circular rod 4 and the first bracket 1, the unused square rod 3 can be removed from the square hole 12.
[0054] Optionally, see Figure 2 and Figure 6 The second bracket 2 is provided with a second circular hole 21, through which the second circular rod 5 can pass, thereby realizing the installation of the second circular rod 5 on the second bracket 2 and making it easy to disassemble.
[0055] For example, there are two second circular holes 21, one with a diameter of 25 mm and the other with a diameter of 20 mm, and the larger diameter second circular hole 21 is located on the side of the smaller diameter second circular hole 21 closer to the first bracket 1.
[0056] Optionally, see Figure 7 The first bracket 1 includes a first U-shaped arm, and the second bracket 2 includes a second U-shaped arm. The openings of the first and second U-shaped arms are opposite each other. A square rod 3 and a first circular rod 4 can pass through both ends of the first U-shaped arm, and a second circular rod 5 can pass through both ends of the second U-shaped arm. This arrangement allows the lock under test to be installed on the central axis of the first bracket 1 and the second bracket 2, keeping the lock under test on the central axis of the tensile testing machine, ensuring that the lock under test is subjected to uniform and accurate force, and improving the accuracy of the test. At the same time, it ensures the stability of the square rod 3 and the first circular rod 4 installed on the first bracket 1, and the stability of the second circular rod 5 installed on the second bracket 2. Moreover, the first and second U-shaped arms also provide space for the connection between the lock and the square rod 3, the first circular rod 4, and the second circular rod 5, making it convenient for operators to quickly install the lock onto the universal lock tensile testing fixture.
[0057] Specifically, see Figure 7The first U-shaped arm has a square hole 12 and a first circular hole 11 at both ends, and the second U-shaped arm has a second circular hole 21 at both ends.
[0058] Optionally, see Figure 7 The first circular rod 4, the second circular rod 5 and / or the square rod 3 are provided with a blocking part 6. The blocking part 6 can contact the first bracket 1 and the second bracket 2 to prevent the first circular rod 4 or the square rod 3 from detaching from the first bracket 1 during the test, and to prevent the second circular rod 5 from detaching from the second bracket 2, thus ensuring the stability of the lock installed on the universal lock tensile test fixture during the tensile test.
[0059] For example, see Figure 7 The blocking part 6 of the first circular rod 4 is a cylindrical block, and the cross-sectional diameter of the blocking part 6 of the first circular rod 4 is larger than the cross-sectional diameter of the first circular rod 4, so that the blocking part 6 will not enter the first circular hole 11; the blocking part 6 of the second circular rod 5 is a cylindrical block, and the cross-sectional diameter of the blocking part 6 of the second circular rod 5 is larger than the cross-sectional diameter of the second circular rod 5, so that the blocking part 6 will not enter the second circular hole 21; the blocking part 6 of the square rod 3 is a cube with a square cross-sectional shape, and the side length of the cross-section of the blocking part 6 of the square rod 3 is larger than the side length of the cross-section of the square rod 3, so that the blocking part 6 will not enter the square hole 12.
[0060] Example 2
[0061] like Figure 1 As shown, this embodiment provides a tensile testing machine, including a tensile testing machine body 200 and a universal clamp for lock tensile testing according to Embodiment 1. The first bracket 1 and the second bracket 2 of the universal clamp for lock tensile testing are detachably mounted on the tensile testing machine body 200. The detachable connection between the first bracket 1 and the second bracket 2 and the tensile testing machine body 200 facilitates quick replacement and maintenance of the first bracket 1 and the second bracket 2 by subsequent personnel.
[0062] Specifically, see Figure 6 The tensile testing machine also includes a first fastener and a second fastener. The first bracket 1 is provided with a first connecting hole 13, through which the first fastener can pass and connect to the tensile testing machine body 200. The second bracket 2 is provided with a second connecting hole 22, through which the second fastener can pass and connect to the tensile testing machine body 200, thus realizing the connection between the first bracket 1 and the second bracket 2 and the tensile testing machine body 200.
[0063] For example, the first and second fasteners are bolts, allowing the first bracket 1 and the second bracket 2 to be detachably mounted on the tensile testing machine body 200. During testing, the tester secures the first bracket 1 to the tensile testing machine body 200, and then... Figure 1Pulling the second bracket 2 in the X direction will complete the lock's tension test.
[0064] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.
Claims
1. A universal fixture for lock pull testing, characterized by, include: The first support (1) and the second support (2) are arranged at intervals along the test direction; A square rod (3), at least one first circular rod (4) and at least one second circular rod (5), wherein the square rod (3) and the first circular rod (4) are detachably connected to the first bracket (1), and a first test port (14) for one end of the lock to pass through is formed between the square rod (3) or the first circular rod (4) and the first bracket (1), and the second circular rod (5) is detachably connected to the second bracket (2), and a second test port (23) for the other end of the lock to pass through is formed between the second circular rod (5) and the second bracket (2).
2. The universal fixture for lock pull testing of claim 1, wherein, The first bracket (1) is provided with square holes (12) and first circular holes (11) arranged at intervals along the first direction. The square rod (3) can pass through the square hole (12) and the first circular rod (4) can pass through the first circular hole (11).
3. The universal fixture for lock pull testing of claim 1, wherein, The second bracket (2) is provided with a second circular hole (21), and the second circular rod (5) can pass through the second circular hole (21).
4. The universal fixture for lock pull testing of claim 1, wherein, The first support (1) includes a first U-shaped arm, and the second support (2) includes a second U-shaped arm. The openings of the first U-shaped arm and the second U-shaped arm are opposite to each other. The square rod (3) and the first round rod (4) can pass through both ends of the first U-shaped arm, and the second round rod (5) can pass through both ends of the second U-shaped arm.
5. The universal fixture for lock pull testing of claim 1, wherein, The first test port (14) is formed between the square rod (3) and the first support (1). The cross-sectional shape of the square rod (3) is square, and the diameter of at least one of the second circular rods (5) is the same as the side length of the square rod (3).
6. The universal fixture for lock pull testing of claim 1, wherein, When there are multiple first circular rods (4) and multiple second circular rods (5), one of the multiple first circular rods (4) can form the first test port (14) with the first bracket (1), and one of the multiple second circular rods (5) can form the second test port (23) with the second bracket (2). The diameters of the multiple first circular rods (4) are different, and the diameters of the multiple second circular rods (5) are different.
7. The universal fixture for lock pull testing according to claim 6, wherein, At least one of the first circular rods (4) has the same diameter as one of the plurality of second circular rods (5).
8. The universal fixture for testing the tensile strength of locks according to any one of claims 1-7, characterized in that, The first circular rod (4), the second circular rod (5) and / or the square rod (3) are provided with a blocking part (6), which can contact the first support (1) and the second support (2).
9. Tension machine, characterized in that, Includes a tensile testing machine body (200) and a universal fixture for lock tensile testing as described in any one of claims 1-8, wherein the first bracket (1) and the second bracket (2) of the universal fixture for lock tensile testing are detachably mounted on the tensile testing machine body (200).
10. The tensile machine of claim 9, wherein, The tensile testing machine also includes a first fastener and a second fastener. The first bracket (1) is provided with a first connecting hole (13). The first fastener can pass through the first connecting hole (13) and be connected to the tensile testing machine body (200). The second bracket (2) is provided with a second connecting hole (22). The second fastener can pass through the second connecting hole (22) and be connected to the tensile testing machine body (200).