A function test tool for headrest actuator

Abstract

This utility model discloses a functional testing fixture for a headrest actuator, comprising: a workbench; test plates, with the surfaces of two adjacent test plates arranged parallel to each other on the workbench to form a test station; fixed rails connected to the side walls between the two adjacent test plates; and a load-bearing test plate, the cross-section of which is U-shaped, with both ends of the load-bearing test plate slidably connected to the fixed rails. The bottom of the load-bearing test plate is used to abut the top of the headrest actuator under test, and the bottom of the headrest actuator under test abuts the workbench. Two test plates that can be vertically fixed on the workbench, with the fixed rails connected to the inner sides of the test plates, allow for convenient collection of the movement of the headrest actuator under test during vertical telescopic drive of the headrest, eliminating the need for manual or other support by the worker, keeping the headrest in a vertical position, achieving high vertical telescopic accuracy, and simplifying the testing method.

Description

Technical Field

[0001] This utility model relates to the field of headrest actuator technology, and in particular to a functional testing fixture for a headrest actuator. Background Technology

[0002] A headrest actuator is a device that controls the movement of a headrest through mechanical or electronic drive. It is mainly used to adjust the height and angle of the headrest or to trigger rapid displacement in the event of a collision to protect the occupant's neck. Common solutions include worm gear reduction mechanisms and rack and pinion linear transmissions, which are driven by a motor to achieve position adjustment.

[0003] Headrest actuators are key components for automotive safety and intelligent upgrades, and their technological development is rapidly evolving from basic mechanical transmission towards mechatronics and intelligentization. In the future, with the integration of new materials, brain-computer interfaces, and other technologies, actuators will achieve greater breakthroughs in response speed, functional integration, and user interaction experience.

[0004] Currently, after the headrest actuator is assembled, it is necessary to test its vertical movement and its driving status under load. Furthermore, the headrest actuator needs to remain in a fixed position with a high degree of verticality during operation, making the testing difficult and the accuracy uncertain. Therefore, a functional testing fixture for the headrest actuator is still needed to solve these problems. Utility Model Content

[0005] This utility model provides a functional testing fixture for a headrest actuator to solve the above-mentioned problems.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A functional testing fixture for a headrest actuator, comprising:

[0008] Workbench;

[0009] Test stands, with the surfaces of two adjacent test stands arranged parallel to each other on the workbench to form a test station;

[0010] A fixed rail is connected to the side wall between two adjacent test uprights;

[0011] The load-bearing test plate has a U-shaped cross-section, and the two ends of the load-bearing test plate are slidably connected to the fixed rails. The bottom of the load-bearing test plate is used to abut the top of the headrest actuator to be tested, and the bottom of the headrest actuator to be tested abuts the worktable.

[0012] In one embodiment, the top of the load-bearing test plate has a hook-on protrusion for inserting a counterweight.

[0013] In one embodiment, the test plate is provided with an upper limit switch and a lower limit switch located at different heights to limit the movement distance of the load-bearing test plate.

[0014] In one embodiment, the load-bearing test plate has a clearance hole for avoiding the lead screw of the headrest actuator under test, and the workbench is provided with a support platform for abutting the bottom of the headrest actuator under test.

[0015] In one embodiment, the clearance hole is a strip groove that extends through the thickness of the load-bearing test plate and to one side of the load-bearing test plate.

[0016] In one embodiment, the load-bearing test plate has connecting grooves on both outer walls, and a sliding seat is fixedly connected in the connecting groove. The load-bearing test plate is slidably connected to the fixed rail through the sliding seat.

[0017] In one embodiment, the number of test stations is 1-7.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0019] By setting up two test stands that can be vertically fixed on the workbench, and connecting the inner side of the test stands to the fixed rails, the movement of the headrest actuator under test during vertical telescopic drive of the headrest can be easily collected through the cooperation of the rails and the load-bearing test stands. No worker is required to hold or support the headrest in any other way, keeping the headrest in a vertical position, achieving high vertical telescopic accuracy, and simplifying the testing method. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the functional testing fixture in use according to an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the functional testing fixture without counterweight according to an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the functional testing fixture structure according to an embodiment of this utility model;

[0023] Figure 4 This is an exploded view of the functional testing fixture structure of a single workstation according to an embodiment of this utility model.

[0024] In the diagram: 1. Workbench; 2. Test stand; 3. Fixed rail; 4. Load-bearing test plate; 41. Hanging protrusion; 42. Clearance hole; 43. Connecting groove; 44. Sliding seat; 6. Counterweight; 7. Upper limit switch; 8. Lower limit switch; 9. Headrest actuator. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0026] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0027] Reference Figure 1-4 This utility model provides a functional testing fixture for a headrest actuator 9, including: a workbench 1, a test stand 2, a fixed rail 3, and a load-bearing test plate 4.

[0028] Two adjacent test plates 2 are arranged parallel to each other on the workbench 1 to form a test station. The two test plates 2 are metal plates with parallel surfaces. The fixed rail 3 is connected to the side wall between the two adjacent test plates 2. The load-bearing test plate 4 has a U-shaped cross-section, and both ends of the load-bearing test plate 4 are slidably connected to the fixed rail 3. The bottom of the load-bearing test plate 4 is used to abut the top of the headrest actuator 9 under test, and the bottom of the headrest actuator 9 abuts the workbench 1. The shape of the load-bearing test plate 4 is, for example, a flat plate in the middle and perpendicular side plates on both sides. The top of the load-bearing test plate 4 is used to place the load-bearing component, and the bottom is used to press the top shell of the headrest actuator 9. The load-bearing test plate 4 and the fixed rail 3 are slidably connected and can be raised and lowered vertically along the direction of the fixed rail 3. By setting up load-bearing test plates 4 that can be raised and lowered vertically, a counterweight 6 can be placed on the top of the load-bearing test plate 4, and the headrest actuator 9 can be placed and fixed at the bottom. During operation, the headrest actuator 9 can move up and down vertically. The bottom housing of the headrest actuator 9 drives the load-bearing test plate 4, pushing it up and down vertically. With the auxiliary support of the test plates 2 on both sides, the top of the headrest actuator 9 maintains a high degree of verticality, simulating the movement of the headrest under a load greater than in reality. This simplifies the difficulty and process of vertical function testing, eliminating the need to hold or support the headrest actuator 9 while keeping it raised or lowered. It also reduces the workload for workers.

[0029] In one embodiment, the top of the load-bearing test plate 4 has a mounting protrusion 41 for inserting a counterweight 6. The top of the mounting protrusion 41 is used to mount the load-bearing test block, such as the counterweight 6. The counterweight 6 can be stacked in different quantities according to specific needs to simulate the load weight of the headrest actuator 9 under different conditions and maintain the direction of gravity consistent with the driving direction of the actuator, so as to avoid the headrest actuator 9 from shaking when moving at different heights and improve the test quality of the headrest actuator 9.

[0030] Preferably, the test plate 2 is equipped with an upper limit switch 7 and a lower limit switch 8 located at different heights to limit the movement distance of the load-bearing test plate 4. Furthermore, by setting the upper limit switch 7 and the lower limit switch 8, the vertical lifting height range of the load-bearing test plate 4 is limited, thereby enabling precise testing of the drive operation of the headrest actuator 9 within a fixed height range. This facilitates the collection of actuator operation data within the fixed height range.

[0031] Preferably, the load-bearing test plate 4 has a clearance hole 42 for avoiding the lead screw of the headrest actuator 9 under test, and the workbench 1 is provided with a support platform for abutting the bottom of the headrest actuator 9 under test. The clearance hole 42 penetrates the thickness of the load-bearing test plate 4, allowing the threaded rod of the headrest actuator 9 to be inserted into the weighing block when the load-bearing test plate 4 is lowered, avoiding motion interference between the headrest actuator and the threaded rod, and ensuring that the headrest actuator 9 can be damaged to the lowest possible probability in the testing environment.

[0032] Preferably, the clearance hole 42 is a strip-shaped groove that penetrates the thickness of the load-bearing test plate 4 and extends to one side of the load-bearing test plate 4. The clearance hole 42 is strip-shaped, allowing the protruding part of the headrest actuator 9 to slide along the strip-shaped groove into the weighing test plate and eventually into the end of the clearance hole 42. This facilitates the placement and removal of the headrest actuator 9 during testing and reduces labor intensity.

[0033] Preferably, the load-bearing test plate 4 has connecting grooves 43 on both outer walls, and a sliding seat is fixedly connected in the connecting groove 43. The load-bearing test plate 4 is slidably connected to the fixed rail 3 through the sliding seat 44. The sliding seat has a track that cooperates with the fixed rail 3. The cooperation of the track makes it easy to replace different tracks and sliding seats, thereby improving the verticality during vertical movement.

[0034] Preferably, the number of test stations is 1-7.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A functional testing fixture for a headrest actuator, characterized in that, include: Workbench; Test stands, with the surfaces of two adjacent test stands arranged parallel to each other on the workbench to form a test station; A fixed rail is connected to the side wall between two adjacent test uprights; The load-bearing test plate has a U-shaped cross-section, and the two ends of the load-bearing test plate are slidably connected to the fixed rails. The bottom of the load-bearing test plate is used to abut the top of the headrest actuator to be tested, and the bottom of the headrest actuator to be tested abuts the worktable.

2. The functional testing fixture according to claim 1, characterized in that, The top of the load-bearing test plate has a hanging protrusion for inserting a counterweight.

3. The functional testing fixture according to claim 2, characterized in that, The test plate is equipped with upper limit switches and lower limit switches located at different heights to limit the movement distance of the load-bearing test plate.

4. The functional testing fixture according to claim 2, characterized in that, The load-bearing test plate has a clearance hole for avoiding the lead screw of the headrest actuator under test, and the workbench is provided with a support platform for abutting the bottom of the headrest actuator under test.

5. The functional testing fixture according to claim 4, characterized in that, The clearance hole is a strip groove that penetrates the thickness of the load-bearing test plate and extends to one side of the load-bearing test plate.

6. The functional testing fixture according to claim 4, characterized in that, The load-bearing test plate has connecting grooves on both outer walls, and a sliding seat is fixedly connected in the connecting groove. The load-bearing test plate is slidably connected to the fixed rail through the sliding seat.

7. The functional testing fixture according to claim 1, characterized in that, The number of test stations is 1-7.

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