Equipment for key plugging torsion test of mechanical lock of motor vehicle
By designing a clamp and lock body clamping device, and combining it with electromagnetic force fixation, high-frequency key insertion, removal and torsion tests on different motor vehicle mechanical locks were achieved. This solved the problem of difficult manual operation caused by differences in lock body size, and improved testing efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-21
- Publication Date
- 2026-04-14
AI Technical Summary
Existing technologies make it difficult to perform high-frequency key insertion, removal, and torsion tests on different motor vehicle mechanical locks, especially due to the difficulty of manual operation caused by differences in lock body size.
An actuator for clamping, inserting, and twisting keys and a lock body clamping device were designed. The clamping device can hold lock bodies of various sizes and adjust the position and direction of the keyhole. Combined with electromagnetic force for fixation, automated testing can be achieved.
It enables high-frequency key insertion, removal, and torsion testing of different motor vehicle mechanical locks, requiring only one set of equipment, and can accurately adjust and fix the lock body position, thus improving testing efficiency and accuracy.
Smart Images
Figure CN121855847A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a device for testing the insertion and removal torsion of mechanical lock keys in motor vehicles, belonging to the field of motor vehicle testing technology. Background Technology
[0002] With the development of automotive manufacturing technology and the increasing demands of consumers for vehicle quality, the research and development of motor vehicles that utilize mechanical locks (such as buses, freight vehicles, and engineering vehicles) requires testing the mechanical locks and keys themselves to withstand insertion, removal, and torsion. The basic testing method involves inserting the key into the lock, twisting it 90°, twisting it 180°, and then removing it within 20 seconds, repeating this process more than 2500 times. Testing the torsional strength and sensitivity of the steering mechanism also generally requires performing the same number of operations.
[0003] like Figure 1 As shown, the external shape and structure of the lock body 5 of all motor vehicle mechanical locks are basically the same, and there are two threaded mounting holes 51 located on the same side of the lock body for fixing. However, the lock bodies 5 of different types, brands, or different generations of the same brand of motor vehicles have certain differences in size, while the shape and size of the key handle 61 used for unlocking are highly consistent.
[0004] Because the key insertion, removal, and torsion tests are performed frequently, it is almost impossible to complete the above operations manually. Therefore, designing a device that can automatically perform key insertion, removal, and torsion tests on various motor vehicle mechanical locks is an urgent problem to be solved. Summary of the Invention
[0005] The technical problem to be solved by this invention is: how to perform high-frequency key insertion, removal and twisting on various motor vehicle mechanical locks.
[0006] To address the above problems, the technical solution proposed by this invention is as follows: A device for testing the insertion, removal, and torsion of keys in a motor vehicle mechanical lock includes an actuator for clamping, inserting, removing, and torsion of the key, and a lock body clamping device for fixing the lock body. The actuator includes a first bracket and a double-acting cylinder mounted on the first bracket. The double-acting cylinder has a telescopic and torsion rod, and a key handle can be fixed along the axial direction of the rod at its front end. The lock body clamping device includes a second bracket and a clamp fixed on the second bracket. The clamp can clamp lock bodies of various sizes and adjust the position and orientation of their keyholes.
[0007] The clamp includes a core and a clamping body for securing the core. The core is capable of fixing various lock bodies with different sizes. When the core is clamped on the clamping body, its position and rotation direction can be adjusted.
[0008] The core body includes a core tube, the tube hole of which is an installation space capable of accommodating various lock bodies with different sizes. Two oblong holes are provided on one side of the core tube, and the two oblong holes correspond to two threaded mounting holes on the lock body located in the installation space.
[0009] The clamping body is an annular clamping ring, and its inner space is a second installation space for accommodating the core tube. The outer periphery of the core tube has a pressing flange that can press against the clamping ring. The diameter of the second installation space is larger than the outer diameter of the core tube. In application, the rear section of the core tube is inserted into the second installation space from front to back of the clamping ring, so that the pressing flange can be pressed and fixed against the front side of the clamping ring under the action of external force.
[0010] The clamp also includes a spinning sleeve, the front end of which is a sleeve tube and the rear end is an end plate fixed to the sleeve tube. A threaded screw hole is provided in the center of the end plate. The outer periphery of the rear end of the core tube is provided with an external thread. In application, the sleeve tube of the spinning sleeve is sleeved on the rear section of the core tube after the clamping ring. The threaded screw hole on its end plate engages with the external thread of the core tube. Rotating the spinning sleeve can clamp and fix the clamping ring by the front end face of the sleeve tube and the rear side of the pressure flange.
[0011] The diameter of the sleeve is larger than the diameter of the mounting space of the clamping ring, and the outer diameter of the sleeve is smaller than or equal to the outer diameter of the clamping ring. Several electromagnets are evenly spaced along the inner circumference of the clamping ring. The pressure flange is made of iron. Before fixing with a spinning sleeve, the pressure flange and the clamping ring are temporarily constrained by electromagnetic force.
[0012] An annular groove is provided on the front side of the clamping ring. An elastic ring and a pressure ring are provided from the inside to the outside of the annular groove. The pressure ring is radially constrained in the annular groove but can axially expand and contract within the annular groove. Several spherical recesses are provided at equal intervals around the front side of the pressure ring. Balls are provided in the recesses. Part of the spherical surface of the ball protrudes from the front side of the pressure ring and can be pressed against the pressure flange. Under no external force, the front side of the pressure ring protrudes from the front side of the clamping ring. When subjected to backward pressure, it can be compressed into the annular groove.
[0013] The electromagnet has a controller to control the magnitude of its magnetic force.
[0014] The front end of the rod has a keyhole for inserting a key handle in the central region. Beneficial effects
[0015] 1. Only one set of equipment is needed to perform high-frequency key insertion, removal, and turning on various mechanical locks of motor vehicles with different sizes; 2. The position and direction of the lock body and keyhole can be easily adjusted; 3. Once the position and orientation are adjusted, it can be locked by electromagnetic force and should not be moved when further fixed. Attached Figure Description
[0016] Figure 1 The key and lock body of the mechanical lock involved in this application; Figure 2 This is a three-dimensional schematic diagram of the device used for key insertion and removal torsion testing of motor vehicle mechanical locks as described in Embodiment 1; Figure 3 for Figure 2 A partial schematic diagram; Figure 4 This is a three-dimensional schematic diagram of the lock body clamping device described in Embodiment 1; Figure 5 This is a three-dimensional schematic diagram of the core tube in the core body described in Embodiment 1; Figure 6 This is a three-dimensional schematic diagram of the core tube described in Embodiment 1; Figure 7 This is a cross-sectional view of the clamp holding the lock body as described in Embodiment 1; Figure 8 This is a three-dimensional schematic diagram of the rear side of the clamping ring and its annular sealing plate described in Embodiment 2; Figure 9 This is a three-dimensional schematic diagram of the front side of the clamping ring equipped with an electromagnet as described in Embodiment 2; Figure 10 This is a cross-sectional schematic diagram of the clamp described in Embodiment 2. The diagram shows that the pressing flange is attracted to the clamping ring under the action of electromagnetic force, thereby temporarily fixing the core, but the spinning sleeve has not yet been finally fixed. Figure 11 This is a three-dimensional schematic diagram of the lock body clamping device described in Embodiment 3; Figure 12 This is a schematic diagram of the front side of the clamping ring, elastic ring, and pressure ring described in Embodiment 3; Figure 13 This is a three-dimensional schematic diagram of the elastic ring and pressure ring assembled in the annular groove of the clamping ring as described in Embodiment 3; Figure 14 This is a cross-sectional schematic diagram of the clamp described in Embodiment 3. The figure shows that under the action of electromagnetic force, the pressure flange is attracted to the balls of the pressure ring, thereby achieving temporary constraint on the core and ensuring that the core can still move and twist within the installation space 2. Figure 15 for Figure 14 A partial schematic diagram; Figure 16 The figure shows a cross-sectional view of the clamp described in Embodiment 3. The figure shows that under the action of stronger electromagnetic force, the elasticity of the elastic ring is overcome so that the pressure flange is adsorbed onto the clamping ring, thereby temporarily fixing the core. However, the spinning sleeve has not yet been finally fixed.
[0017] In the diagram: 1. Double-acting cylinder; 11. Rod; 2. Bracket 1; 3. Bracket 2; 4. Clamp; 41. Core; 410. Installation space 1; 411. Core tube; 4111. External thread; 4112. Waist-shaped hole; 412. Press-fit flange; 42. Clamping ring; 420. Installation space 2; 421. Annular groove; 43. Electromagnet; 44. Annular sealing plate; 45. Elastic ring; 46. Pressure ring; 461. Ball bearing; 47. Spin sleeve; 471. Sleeve compression tube; 472. Threaded screw-in hole; 48. Screw; 5. Lock body; 50. Lock hole; 51. Threaded mounting hole; 6. Key; 61. Key handle. Detailed Implementation
[0018] like Figure 1 As shown, this application relates to mechanical locks for motor vehicles. The external surface structure of the lock body (5) of all motor vehicle mechanical locks is basically the same, and there are two threaded mounting holes (51) for fixing located on the same side of the lock body (5). However, the lock bodies (5) of different types, brands, or different generations of the same brand of motor vehicles have certain differences in size, while the shape and size of the key handle (61) of the key (6) used for unlocking are highly consistent.
[0019] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1
[0020] like Figure 2-7 As shown, a device for testing the insertion, removal, and torsion of keys in a motor vehicle mechanical lock includes an actuator for clamping, inserting, removing, and torsion of the key, and a lock body clamping device for fixing the lock body 5. The actuator includes a bracket 2 and a double-acting cylinder 1 mounted on the bracket 2. The double-acting cylinder 1 has a telescopic and torsionable rod 11. At the front end of the rod 11, the key handle 61 of the key 6 can be fixed along the axial direction of the rod 11. The lock body clamping device includes a bracket 3 and a clamping device 4 fixed on the bracket 3. The clamping device 4 can clamp lock bodies 5 of various sizes and adjust the position and orientation of their keyhole 50. The double-acting cylinder 1 can be a double-acting electric cylinder, a pneumatic cylinder, or a hydraulic cylinder, preferably a double-acting pneumatic cylinder. The term "double-acting" refers to the fact that its rod 11 can telescopically extend and rotate, and it is a mature commercially available product. In application, the key handle 61 of the key 6 is fixed along the axial direction of the rod 11 at its front end. The clamp 4 holds the lock body 5, aligning the key hole 50 with the key 6. The double-acting cylinder 1 pushes the rod 11 to repeatedly insert the key 6 into the key hole 50, rotate the lock cylinder, and pull out the key 6. This replaces manual operation to achieve high-frequency insertion, removal, and rotation of the key 6 in the key hole 50. Since the clamp 4 can hold lock bodies 5 of various sizes and adjust the position and orientation of their key holes 50, only one device is needed to test the mechanical locks of various motor vehicles.
[0021] To facilitate the alignment of the lock hole 50 with the key 6 before testing, the extension, retraction, and torsion of the double-acting cylinder are further made speed-adjustable, which is also a mature existing technology.
[0022] The key handle 61, which can fix the key 6 along the axial direction of the rod 11 at the front end of the rod 11, is preferably provided with an insertion hole (not shown in the figure) in the axial region at the front end of the rod 11 for inserting the key handle 61.
[0023] like Figure 3 , 4 As shown, the clamp 4 includes a core 41 and a clamping body for securing the core 41. The core 41 can fix various lock bodies 5 with different sizes. When the core 41 is clamped on the clamping body, its position and rotation direction can be adjusted. Since the position and width direction of the keyhole 50 will change when clamping lock bodies 5 of different sizes, the core 41 needs to be able to adjust its position and rotation direction when clamped on the clamping body to ensure that the key 6 can be accurately inserted into the keyhole 50.
[0024] like Figure 4 , 5 As shown in Figure 6, the core body 41 includes a core tube 411. The tube hole of the core tube 411 is an installation space 410 that can accommodate various lock bodies 5 with different sizes. Two oblong holes 4112 are provided on one side of the core tube 411. The two oblong holes 4112 correspond to two threaded mounting holes 51 on the lock body 5 located in the installation space 410. The installation space 410 is slightly larger than the lock body 5, and can accommodate lock bodies 5 of various sizes. The oblong holes 4112 are also used to accommodate the change in the spacing between the two threaded mounting holes 51. During fixing, a screw 48 is screwed into the threaded mounting hole 51 on the lock body 5 through the oblong holes 4112, thereby fixing the lock body 5 in the core body 41.
[0025] like Figure 3 , 4 As shown in Figure 7, the clamping body is an annular clamping ring 42, the inner space of which is a second mounting space 420 for accommodating the core tube 411. The outer periphery of the core tube 411 has a pressing flange 412 that can press against the clamping ring 42. The diameter of the second mounting space 420 is larger than the outer diameter of the core tube 411. In application, the rear section of the core tube 411 is inserted into the second mounting space 420 from front to back of the clamping ring 42, so that the pressing flange 412 can be pressed and fixed against the front side of the clamping ring 42 under the action of external force. Here, the diameter of the second mounting space 420 is larger than the outer diameter of the core tube 411 so that when clamping lock bodies 5 of different sizes causes the keyhole 50 to not be aligned with the key 6, the core tube 411 can be moved up, down, left, right or rotated within the second mounting space 420 until the keyhole 50 is precisely aligned with the key 6.
[0026] The clamp 4 also includes a spinning sleeve 47. The front end of the spinning sleeve 47 is a sleeve tube 471, and the rear end is an end plate fixed to the sleeve tube 471. A threaded screw hole 472 is provided in the center of the end plate. The outer periphery of the rear end of the core tube 411 is provided with an external thread 4111. In application, the sleeve tube 471 of the spinning sleeve 47 is sleeved on the rear section of the core tube 411 behind the clamping ring 42. The threaded screw hole 472 on its end plate is engaged with the external thread 4111 of the core tube 411. Rotating the spinning sleeve 47 can make the front end face of the sleeve tube 471 and the rear side of the pressure flange 412 clamp and fix the clamping ring 42, thereby realizing the fixation of the core 41 on the clamping ring 42.
[0027] The diameter of the sleeve 471 is larger than the diameter of the installation space 420 of the clamping ring 42, and the outer diameter of the sleeve 471 is less than or equal to the outer diameter of the clamping ring 42.
[0028] It should be noted that although the dimensions of the lock body 5 of different motor vehicle mechanical locks vary, the differences are not significant. After the core tube 411 moves up, down, left, right, or rotates within the installation space 420, it will not cause a large displacement. The front end face of the sleeve tube 471 and the rear side of the pressure flange 412 can still properly clamp the clamping ring 42 between them. Example 2
[0029] like Figure 8-10 As shown, this is a further improvement of Embodiment 1. Several electromagnets 43 are evenly spaced circumferentially within the clamping ring 42. The pressing flange 412 is made of iron. Before fixing with the spinning sleeve 47, electromagnetic force temporarily binds the pressing flange 412 to the clamping ring 42. Thus, during the fixing of a lock body 5, when the lock hole 50 of the lock body 5 is adjusted to the correct position and direction by moving or twisting the core 41, electricity can be applied to allow the magnetic force generated by the electromagnets 2 to attract the pressing flange 412 onto the clamping ring 42, achieving temporary fixing of the core 41 and the clamping ring 42. This prevents the already adjusted lock hole position and direction from shifting when the spinning sleeve 47 is tightened. After tightening the spinning sleeve 47, the power can be disconnected.
[0030] To facilitate the installation and sealing of the electromagnet 43 on the clamping ring 42, an annular sealing plate 44 fixed to the clamping ring 42 is provided on the front side of the clamping ring 42. Example 3
[0031] like Figure 11-16As shown, this is a further improvement of Embodiment 2. An annular groove 421 is provided on the front side of the clamping ring 42. An elastic ring 45 and a pressure ring 46 are provided from the inside to the outside of the annular groove 421. The pressure ring 46 is radially constrained within the annular groove 421 but can axially expand and contract within the annular groove 421. Several spherical recesses are evenly spaced circumferentially on the front side of the pressure ring 46. Balls 461 are provided within the recesses. Part of the spherical surface of the balls 461 protrudes from the front side of the pressure ring 46 and can press against the pressure flange 412. Under no external force, the front side of the pressure ring 46 protrudes from the front side of the clamping ring 42. When subjected to backward pressure, it can be compressed into the annular groove 421. The electromagnet 43 has a controller (not shown in the figure) to control the magnitude of its magnetic force. The application is performed according to the following steps: 1. By controlling the current or voltage through the controller, the electromagnet 43 generates a small electromagnetic force, which attracts the pressure flange 412 to press against the ball 461 on the pressure ring 46. The pressure flange 412 is moved and rotated by hand by rolling the ball 461. Second, by increasing the electromagnetic force through the controller, the pressure flange 412 presses the pressure ring 46 further into the annular groove 421 under the action of the increased electromagnetic force, so that the pressure flange 412 is strongly pressed onto the annular sealing plate 44, and the core 41 and the clamping ring 42 are temporarily fixed. 3. Secure the spinning sleeve 47 to the clamping ring 42 and disconnect the power supply to the electromagnet 43.
[0032] Thus, the technical solution provided in this embodiment can both constrain the core 41 on the clamping ring 42 and allow the pressure flange 412 to move easily in position and direction of rotation via the rolling of the ball 461, thereby adjusting the position and direction of the lock hole 50.
[0033] The embodiments described are only used to more clearly describe the present invention and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.
Claims
1. A device for testing the insertion and removal torsion of mechanical lock keys in motor vehicles, characterized in that: The device includes an actuator for clamping, inserting, and twisting a key, and a lock body clamping device for fixing the lock body (5). The actuator includes a bracket (2) and a double-acting cylinder (1) mounted on the bracket (2). The double-acting cylinder (1) has a rod (11) that can extend, retract, and twist. The handle (61) of the key (6) can be fixed along the axial direction of the rod (11) at the front end of the rod (11). The lock body clamping device includes a bracket (3) and a clamp (4) fixed on the bracket (3). The clamp (4) can clamp lock bodies (5) of various sizes and adjust the position and orientation of their keyholes (50).
2. The device for testing the insertion and removal torsion of mechanical lock keys in motor vehicles according to claim 1, characterized in that: The clamp (4) includes a core (41) and a clamping body for clamping the core (41). The core (41) can fix various lock bodies (5) with different sizes. When the core (41) is clamped on the clamping body, its position and direction of rotation can be adjusted.
3. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 2, characterized in that: The core (41) includes a core tube (411), the tube hole of the core tube (411) is an installation space (410) that can accommodate various lock bodies (5) with different sizes. Two waist-shaped holes (4112) are provided on one side of the core tube (411), and the two waist-shaped holes (4112) correspond to two threaded mounting holes (51) on the lock body (5) located in the installation space (410).
4. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 2 or 3, characterized in that: The clamping body is an annular clamping ring (42), and its inner space is a second installation space (420) for accommodating the core tube (411). The outer periphery of the core tube (411) has a pressing flange (412) that can press against the clamping ring (42). The diameter of the second installation space (420) is larger than the outer diameter of the core tube (411). In application, the rear section of the core tube (411) is inserted into the second installation space (420) from front to back from the clamping ring (42), so that the pressing flange (412) can be pressed and fixed against the front side of the clamping ring (42) under the action of external force.
5. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 4, characterized in that: The clamp (4) also includes a spinning sleeve (47), the front end of which is a sleeve tube (471), and the rear end is an end plate fixed to the sleeve tube (471). A threaded screw hole (472) is provided in the center of the end plate. An external thread (4111) is provided on the outer periphery of the rear end of the core tube (411). When in use, the sleeve tube (471) of the spinning sleeve (47) is sleeved on the rear section of the core tube (411) after the clamping ring (42). The threaded screw hole (472) on its end plate is engaged with the external thread (4111) of the core tube (411). Rotating the spinning sleeve (47) can make the front end face of the sleeve tube (471) and the rear side of the pressure flange (412) clamp and fix the clamping ring (42).
6. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 5, characterized in that: The diameter of the sleeve (471) is greater than the diameter of the installation space (420) of the clamping ring (42), and the outer diameter of the sleeve (471) is less than or equal to the outer diameter of the clamping ring (42).
7. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 5, characterized in that: Several electromagnets (43) are provided at equal intervals in the inner circumference of the clamping ring (42). The pressing flange (412) is made of iron. Before fixing with the spinning sleeve (47), the pressing flange (412) and the clamping ring (42) are temporarily constrained by electromagnetic force.
8. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 7, characterized in that: An annular groove (421) is provided on the front side of the clamping ring (42). An elastic ring (45) and a pressure ring (46) are provided from the inside to the outside of the annular groove (421). The pressure ring (46) is radially constrained in the annular groove (421) but can axially expand and contract within the annular groove (421). Several spherical recesses are provided at equal intervals around the front side of the pressure ring (46). Balls (461) are provided in the recesses. Part of the spherical surface of the ball (461) protrudes from the front side of the pressure ring (46) and can be pressed against the pressure flange (412). Under no external force, the front side of the pressure ring (46) protrudes from the front side of the clamping ring (42). When subjected to backward pressure, it can be compressed into the annular groove (421).
9. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 8, characterized in that: The electromagnet (43) has a controller to control the magnitude of its magnetic force.
10. The device for testing the insertion and removal torsion of a key in a motor vehicle mechanical lock according to claim 1, characterized in that: The front end of the rod (11) has a key handle (61) with a socket for inserting the key (6) in the central region.