Automatic force measuring tool for headrest locking steel wire spring

Abstract

The utility model relates to the technical field of headrest fitting force measurement, in particular to an automatic force measurement tool for a headrest locking steel wire spring, which comprises a mounting plate, a support plate capable of linearly moving left and right is arranged on the mounting plate, and a plurality of groups of dynamometers are respectively arranged on the support plate through a plurality of groups of clamps; the mounting plate is further provided with a supporting mechanism corresponding to the dynamometer, and the supporting mechanism is used for supporting the spring and the two types of locking steel wires. The device comprises a supporting table fixed on a mounting plate, a limiting part is arranged on the supporting table, a movable strip is horizontally arranged in the limiting part, the head of the movable strip is connected with a test rod of a dynamometer, and a workpiece to be tested is placed on the supporting table and located at the tail of the movable strip. According to the automatic force measuring tool for the headrest locking steel wire spring, the dynamometer pushes the movable strip to move rightwards, so that the movable strip extrudes the workpiece to be measured, the workpiece is extruded to different states, and the force of the workpiece in different states is obtained through the value of the dynamometer.

Description

Technical Field

[0001] This utility model relates to the field of force measurement technology for headrest accessories, specifically an automatic force measuring tool for headrest locking wire springs. Background Technology

[0002] Car headrests typically use small components such as locking wires and springs. The locking wires are used to lock the headrest rods to the headrest frame, while the springs are used when the headrest is folded. During the production process, the elasticity of both components is usually tested. When testing springs, the tension under different compression states and the attenuation force after long-term use are tested. When testing locking wires, the tension after opening to different angles and the attenuation force after long-term use are tested.

[0003] However, the existing force measurement method involves vertically mounting the spring to the test end of a vertical push-pull force testing platform and obtaining the spring force under different states by compressing the spring. However, due to the limited shape of the tooling that this testing device can measure, it is inconvenient to measure the force of the locking wire and cannot be well applied to the headrest production field. Based on this, an automatic force measurement tooling for headrest locking wire springs is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic force measuring fixture for headrest locking wire springs, which can simultaneously measure the elastic force of springs and various locking wires, resulting in higher efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic force measuring fixture for a headrest locking wire spring, comprising:

[0006] The mounting plate is equipped with a support plate that can move linearly left and right. The support plate is equipped with multiple sets of force gauges through multiple sets of clamps. The force gauges measure the tension and attenuation force of the locking wire and spring in different states.

[0007] The mounting plate is also equipped with a support mechanism corresponding to the force gauge, which is used to support the spring and the two types of locking wires.

[0008] It includes a support platform fixed to a mounting plate, a limiting part on the support platform, and a movable bar horizontally arranged within the limiting part. The head of the movable bar is connected to the test rod of a force gauge. The workpiece to be tested is placed on the support platform and located at the tail of the movable bar. The force gauge pushes the movable bar to the right, causing the movable bar to compress the workpiece to be tested, compressing the workpiece to different states. The force of the workpiece under different states can be obtained through the value of the force gauge.

[0009] Furthermore, a linear module is fixed on the mounting plate, and the output shaft of the linear module is fixed to the support plate. Under the guidance of the limiting slider and the limiting track, the support plate is more stable during operation.

[0010] Furthermore, the head of the movable strip is provided with a T-shaped through groove that matches the head of the force gauge test rod, which can ensure that the movable strip and the force gauge can be connected more conveniently and accurately.

[0011] Furthermore, a limiting rod is fixed inside the limiting part, and an elongated groove matching the limiting rod is provided inside the movable strip. Under the guiding action of the limiting rod and the elongated groove, the movable strip moves more stably.

[0012] Furthermore, a limiting seat corresponding to the movable bar is fixed on the support platform. The limiting seat has a limiting groove on the side facing the movable bar. The spring to be tested is placed in the limiting groove and located at the end of the movable bar. The spring is limited by the limiting groove.

[0013] Furthermore, the support platform is provided with a receiving groove for placing the locking wire, the head of the locking wire extends to correspond to the tail of the movable bar, and the mounting plate is also provided with a clamping member for pressing the locking wire into the receiving groove. The locking wire can be placed in the receiving groove first, and then the clamping member can be used to press the locking wire.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] This automatic force measuring fixture for headrest locking wire springs places the spring to be tested in the limiting groove, and simultaneously places two types of locking wires in their corresponding receiving grooves. Then, the clamping device presses the locking wires together. At this time, the movable bar moves to the right, squeezing the workpiece to be tested and compressing it to different states. The force of the workpiece under different states is obtained by measuring the value of the force gauge. The workpiece can be squeezed to the same state several times, and the final force value can be compared with the initial force value to obtain the attenuation force of the workpiece. It can simultaneously measure the elastic force of springs and multiple locking wires, making it more efficient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a testing fixture in the prior art;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram showing the positions of the linear module, the limiting track, and the limiting slider in this utility model;

[0019] Figure 4 This is a schematic diagram of a support mechanism for locking steel wire in this utility model;

[0020] Figure 5 This is a schematic diagram of the spring support mechanism in this utility model;

[0021] Figure 6 This is a schematic diagram of another locking wire support mechanism in this utility model.

[0022] In the diagram: 1. Mounting plate; 2. Support plate; 3. Force gauge; 4. Fixture; 5. Linear module; 6. Limiting rail; 7. Limiting slider; 8. Support platform; 9. Limiting part; 10. Movable bar; 11. T-slot; 12. Limiting rod; 13. Long slot; 14. Limiting seat; 15. Limiting groove; 16. Receiving groove; 17. Clamping component. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 An automatic force measuring fixture for a headrest locking wire spring in this embodiment includes a mounting plate 1, a support plate 2 that can move linearly left and right on the mounting plate 1, multiple sets of force gauges 3 on the support plate 2, and multiple sets of clamps 4 on the support plate 2 for pressing the force gauges 3 onto the support plate 2. The force gauges 3 are used to measure the tension and attenuation force of the locking wire and spring in different states.

[0025] As for how the support plate 2 moves linearly, such as Figure 3 As shown, a linear module 5 is fixed on the mounting plate 1. The output shaft of the linear module 5 is fixed to the support plate 2. The linear module 5 can drive the support plate 2 to move linearly left and right. The workpiece to be tested can be squeezed to different states by the force gauge 3, thereby obtaining the tension of the workpiece in different states.

[0026] Furthermore, a limiting rail 6 is fixed on the mounting plate 1, and a limiting slider 7 that is slidably connected to the limiting rail 6 is fixed on the support plate 2. Under the guidance of the limiting slider 7 and the limiting rail 6, the support plate 2 has stronger stability during operation.

[0027] The clamp 4 can be a linkage latch lock, which is a known clamping fixture. Its specific structure and principle will not be described in detail here.

[0028] In this embodiment, the mounting plate 1 is also provided with a support mechanism corresponding to the force gauge 3. There are at least three support mechanisms, which can support the spring and two different types of locking steel wires respectively.

[0029] Specifically, such as Figure 4-6 As shown, the support mechanism includes a support platform 8 fixed on the mounting plate 1. The support platform 8 has a limiting part 9, and a movable bar 10 is horizontally arranged inside the limiting part 9. The head of the movable bar 10 is connected to the test rod of the force gauge 3. The workpiece to be tested is placed on the support platform 8 and located at the tail of the movable bar 10. The force gauge 3 pushes the movable bar 10 to the right, causing the movable bar 10 to squeeze the workpiece to be tested, squeezing the workpiece to different states. Thus, the force of the workpiece in different states can be obtained through the value of the force gauge 3.

[0030] To ensure a more convenient and precise connection between the movable strip 10 and the force gauge 3, the head of the movable strip 10 is provided with a T-shaped through groove 11 that matches the head of the test rod of the force gauge 3. When installing the force gauge 3, the head of the test rod of the force gauge 3 can be inserted into the T-shaped through groove 11 of the movable strip 10 first, and then the force gauge 3 can be pressed onto the support plate 2 by the clamp 4. This completes the connection between the movable strip 10 and the force gauge 3. When the support plate 2 moves to the right, the test rod of the force gauge 3 pushes the movable strip 10 to the right to start the test.

[0031] Meanwhile, in order to ensure that the movable bar 10 is more stable when moving horizontally, a limiting rod 12 is fixed inside the limiting part 9, and an elongated groove 13 matching the limiting rod 12 is provided inside the movable bar 10. When the movable bar 10 moves to the right, the elongated groove 13 slides outside the limiting rod 12. At the same time, under the guidance of the limiting rod 12 and the elongated groove 13, the movable bar 10 moves more stably.

[0032] When supporting the spring, a limiting seat 14 corresponding to the movable bar 10 is fixed on the support platform 8. The limiting seat 14 has a limiting groove 15 on the side facing the movable bar 10. The spring to be tested is placed in the limiting groove 15 and located at the tail of the movable bar 10. Figure 5 The state shown is the initial state. When the force gauge 3 pushes the movable bar 10 to the right, the movable bar 10 can compress the spring to be tested. The corresponding values ​​can be obtained by compressing to different degrees, and the tension of the spring under different compression states can be obtained. When detecting the decay force, the spring can be repeatedly compressed to the same state several times. By comparing the final force value with the initial force value, the decay force of the spring can be obtained.

[0033] When supporting the locking wire, such as Figure 4 , Figure 6 As shown, the support platform 8 is provided with a receiving groove 16 for placing the locking wire. The head of the locking wire extends to correspond to the tail of the movable bar 10. The mounting plate 1 is also provided with a clamping member 17 for pressing the locking wire into the receiving groove 16. By placing the locking wire into the receiving groove 16, and then using the clamping member 17 to press the locking wire, and then using the movable bar 10 to push the end of the locking wire to be tested, the tension of the locking wire in different states can be obtained.

[0034] Among them, the clamping component 17 is a clamp, which is a known quick-locking device that can manually and quickly clamp the locking wire. Its specific structure and principle will not be described in detail here.

[0035] Because there are two different types of locking wires, the first type of locking wire, during testing, such as... Figure 4 In the indicated state, the locking wire has three states. The initial state is when it is just in contact with the movable strip 10. During the test, the head of the locking wire is pushed to the first state and the second state in sequence. When the locking wire is pushed to the first state, the force gauge 3 can obtain a value. When the locking wire is pushed to the second state, the force gauge 3 can obtain another value. This allows the tension of the locking wire at different bending angles to be tested. When it is necessary to measure the attenuation force, the force gauge 3 can be pushed back and forth to the second state through the linear module 5. After repeating this process multiple times, the final value can be obtained. By comparing it with the initially obtained value, the attenuation force of the locking wire can be obtained.

[0036] The second type of locking wire exhibits two states during testing, such as... Figure 6 As shown, the initial state is near the end of the movable bar 10, and the unfolded state is when the end expands outward. During the test, the head of the locking wire will be pushed to the unfolded state, and the force gauge 3 can obtain a value. When it is necessary to measure the attenuation force, the force gauge 3 is pushed back and forth to the unfolded state through the linear module 5. After repeating this several times, the final value can be obtained. By comparing it with the initial value, the attenuation force of the locking wire can be obtained.

[0037] In summary, in the above embodiments, when using this utility model, the spring to be tested is placed in the limiting groove 15, and two types of locking steel wires are placed in the corresponding receiving grooves 16 respectively. Then, the locking steel wires are pressed by the clamping member 17. At this time, the support plate 2 can be driven to the right by the linear module 5, so that the movable bar 10 moves to the right. The movable bar 10 squeezes the workpiece to be tested, so that the workpiece is squeezed to different states. Thus, the force of the workpiece in different states can be obtained by the value of the force gauge 3. The workpiece can also be squeezed to the same state several times. By comparing the final force value with the initial force value, the attenuation force of the workpiece can be obtained.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic force measuring fixture for a headrest locking wire spring, characterized in that, include: Mounting plate (1), on which a support plate (2) capable of linear left and right movement is provided, and on which multiple sets of force gauges (3) are respectively provided by multiple sets of clamps (4); The mounting plate (1) is also provided with a support mechanism corresponding to the force gauge (3); It includes a support platform (8) fixed on the mounting plate (1), a limiting part (9) on the support platform (8), a movable strip (10) horizontally arranged in the limiting part (9), the head of the movable strip (10) being connected to the test rod of the force gauge (3), and the workpiece to be tested being placed on the support platform (8) and located at the tail of the movable strip (10).

2. The automatic force measuring fixture for a headrest locking wire spring according to claim 1, characterized in that: A linear module (5) is fixed on the mounting plate (1), and the output shaft of the linear module (5) is fixed to the support plate (2).

3. The automatic force measuring fixture for a headrest locking wire spring according to claim 1, characterized in that: The head of the movable bar (10) is provided with a T-shaped through groove (11) that matches the head of the test rod of the force gauge (3).

4. The automatic force measuring fixture for a headrest locking wire spring according to claim 1, characterized in that: A limiting rod (12) is fixed inside the limiting part (9), and a long groove (13) matching the limiting rod (12) is provided inside the movable strip (10).

5. The automatic force measuring fixture for a headrest locking wire spring according to claim 1, characterized in that: The support platform (8) is fixed with a limiting seat (14) corresponding to the movable bar (10). The limiting seat (14) has a limiting groove (15) on the side facing the movable bar (10). The spring to be tested is placed in the limiting groove (15) and located at the tail of the movable bar (10).

6. The automatic force measuring fixture for a headrest locking wire spring according to claim 1, characterized in that: The support platform (8) is provided with a receiving groove (16) for placing the locking wire. The head of the locking wire extends to correspond to the tail of the movable bar (10). The mounting plate (1) is also provided with a pressing member (17) for pressing the locking wire into the receiving groove (16).

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