Test fixture

Abstract

The utility model provides a test fixture, and relates to the field of test fixtures, and the test fixture comprises a supporting mechanism which is used for being fixed above a test bench, a first clamping piece and a second clamping piece which are arranged on the two sides of the supporting mechanism and can move in the vertical direction relative to the supporting mechanism, and a linkage piece which is arranged on the supporting mechanism and can move in the vertical direction relative to the supporting mechanism. The first clamping piece and the second clamping piece are arranged between the first clamping piece and the second clamping piece and connected with the first clamping piece and the second clamping piece correspondingly, and when the first clamping piece and the second clamping piece move downwards in the vertical direction at the same time under the action of driving force, the first clamping piece and the second clamping piece move downwards in the vertical direction. And when one of the first clamping piece and the second clamping piece is in contact with the upper surface of a tested object placed on the test bed, the other clamping piece drives the other one of the first clamping piece and the second clamping piece to continuously move downwards through the linkage piece, so that the tested object is clamped on the test bed.

Description

Technical Field

[0001] The present application relates to the technical field of test fixtures, and in particular to a test fixture. Background Art

[0002] As people's requirements for vehicle performance continue to increase, the number of vehicle-mounted electronic and electrical components continues to increase, and the requirements for their quality are becoming more and more stringent. As a car radio affects people's driving comfort, its bump resistance during driving is particularly important, so the radio is required to be able to withstand certain mechanical impact tests.

[0003] However, in the prior art, when conducting mechanical shock tests on car radios, due to the fact that the dimensions of the car radios are not uniform and the tops are uneven and not on the same horizontal line, the car radios cannot be properly fixed on the mechanical shock test bench when being clamped to perform the shock test, which fails to meet the requirements of the car radio test. Utility Model Content

[0004] In view of this, and to address at least one of the above-mentioned issues, an embodiment of the present application provides a test fixture.

[0005] The test fixture provided in the present application includes: a support mechanism for fixing to the top of the test bench, a first clamping member and a second clamping member, which are arranged on both sides of the support mechanism, and the first clamping member and the second clamping member can move in a vertical direction relative to the support mechanism, and a linkage member, which is arranged between the first clamping member and the second clamping member and is respectively connected to the first clamping member and the second clamping member, wherein, in the process of the first clamping member and the second clamping member moving downward simultaneously in the vertical direction under the action of a driving force, when one of the first clamping member and the second clamping member contacts the upper surface of the object to be measured placed on the test bench, the one clamping member drives the other clamping member of the first clamping member and the second clamping member to continue to move downward via the linkage member, so as to clamp the object to be measured on the test bench.

[0006] Preferably, the linkage member includes a gear, wherein the test fixture further includes: a first rack, which is arranged on the side surface of the first clamping member close to the gear, and a second rack, which is arranged on the side surface of the second clamping member close to the gear, wherein when the one clamping member contacts the upper surface of the object to be measured, the one clamping member is subjected to a reaction force to drive the gear to rotate via one of the first rack and the second rack connected to the one clamping member, so that the gear drives the other rack of the first rack and the second rack to move downward, thereby driving the other clamping member to move downward.

[0007] Preferably, the first clamping member includes: a first slider, on which the first rack is provided on the side surface of the first slider close to the gear; a first connecting block, fixedly connected to one end of the first slider close to the test bench; a first pressure plate, fixedly connected to one end of the first connecting block close to the test bench, for contacting the upper surface of the object to be measured, wherein the second clamping member includes: a second slider, on which the second rack is provided on the side surface of the second slider close to the gear; a second connecting block, fixedly connected to one end of the second slider close to the test bench; a second pressure plate, fixedly connected to one end of the second connecting block close to the test bench, for contacting the upper surface of the object to be measured.

[0008] Preferably, the support mechanism includes a first vertical bracket and a second vertical bracket, the first vertical bracket and the second vertical bracket are arranged at a distance, and a first sliding groove and a second sliding groove are respectively formed on the opposite sides of the first vertical bracket and the second vertical bracket, wherein the first slider is arranged in the first sliding groove and the second slider is arranged in the second sliding groove, so that the first slider and the second slider can slide in the vertical direction along the first sliding groove and the second sliding groove.

[0009] Preferably, the test fixture also includes: an adjustment component connected to the gear, used to drive the gear to move in the vertical direction, so as to drive the first slider and the second slider to slide in the vertical direction along the first slide groove and the second slide groove through the engagement between the gear and the first rack and the second rack respectively.

[0010] Preferably, the adjustment assembly includes: a connecting rod, one end of which is rotatably connected to the center of the gear, and the connecting rod can move in the vertical direction under the action of a driving force to drive the gear to move in the vertical direction.

[0011] Preferably, the adjustment assembly also includes: a lifting plate, fixedly connected to the other end of the connecting rod, and a first threaded through hole is formed on the lifting plate; a screw rod, threadedly connected to the first threaded through hole, and by rotating the screw rod, the lifting plate is driven to move along the axial direction of the screw rod via the threaded connection, thereby driving the connecting rod to move in the vertical direction.

[0012] Preferably, the support mechanism also includes: a base plate, which is arranged on the test bench, and the first vertical bracket and the second vertical bracket are arranged on two sides of the base plate opposite to each other; a top plate, which is arranged above the first vertical bracket and the second vertical bracket, and a first through hole is formed on the top plate, wherein the adjustment component also includes: a motor, the rotating shaft of the motor is connected to one end of the screw via the first through hole to drive the screw to rotate.

[0013] Preferably, the test fixture also includes: an auxiliary plate, which is arranged between the lifting plate and the gear, one end of the auxiliary plate is fixedly connected to the inner surface of the first vertical bracket, and the other end of the auxiliary plate is fixedly connected to the inner surface of the second vertical bracket, and a second through hole is formed on the auxiliary plate, and the connecting rod passes through the second through hole.

[0014] Preferably, a third through hole is also formed on the lifting plate, wherein the adjustment assembly further includes: a support rod, the support rod is passed through the third through hole, one end of the support rod is fixedly connected to the top plate, and the other end of the support rod is fixedly connected to the auxiliary plate.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 One of the structural schematic diagrams of the test fixture provided in the embodiment of the present application is shown;

[0018] Figure 2 The second structural diagram of the test fixture provided in the embodiment of the present application is shown;

[0019] Figure 3 The third structural diagram of the test fixture provided in the embodiment of the present application is shown.

[0020] Figure numerals: 10, test fixture; 11, linkage; 12, base plate; 13, support mechanism; 14, first slide; 15, second slide; 16, motor; 17, screw; 18, lifting plate; 19, support rod; 20, connecting rod; 21, connecting member; 22, gear; 23, first rack; 24, first slider; 25, first connecting block; 26, first pressure plate; 27, second rack; 28, second slider; 29, second connecting block; 30, second pressure plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0022] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] As vehicle performance requirements continue to rise, the number of in-vehicle electronic and electrical components continues to increase, and the requirements for their quality are becoming increasingly stringent. As a key factor in driving comfort, the ability of car radios to withstand vehicle vibrations during driving is particularly important. Therefore, radios must be able to withstand certain mechanical impact tests. However, existing technologies for mechanical impact testing of car radios fail to meet the testing requirements when clamping them, as car radios have varying dimensions and uneven tops. This makes it difficult to secure the car radios properly on the mechanical impact test bench during testing, failing to meet these testing requirements.

[0026] In response to at least one of the above-mentioned problems, an embodiment of the present application provides a test fixture, which aims to solve at least one problem that the test radios have different sizes and specifications and the tops are uneven and not on the same horizontal line. It is described below through specific embodiments.

[0027] Example:

[0028] Figure 1 One of the structural schematic diagrams of the test fixture provided in the embodiment of the present application is shown.

[0029] like Figure 1 As shown, the test fixture 10 provided in the embodiment of the present application includes a support mechanism 13 , a first clamping member, a second clamping member and a linkage member 11 .

[0030] Specifically, the support mechanism 13 is fixed to the top of the test bench. The support mechanism 13 is the base and support structure of the entire fixture, and plays a supporting and stabilizing role. It can be made of a strong metal material, such as steel or aluminum alloy.

[0031] The first clamping member and the second clamping member are arranged on both sides of the support mechanism 13, and the first clamping member and the second clamping member can move in the vertical direction relative to the support mechanism 13. The first clamping member and the second clamping member are respectively arranged on both sides of the support mechanism 13. The specific position depends on the shape and size of the object to be clamped, as well as the specific requirements of the test. In order to ensure that the object to be measured does not move or fall off during the test, the first clamping member and the second clamping member have adjustable clamping force to adapt to objects to be measured of different sizes and hardnesses. The first clamping member and the second clamping member can move in the vertical direction relative to the support mechanism 13. This design allows the user to flexibly adjust the position of the clamping member according to the height of the object to be measured or the test requirements to ensure that the object to be measured is correctly clamped.

[0032] The linkage member 11 is arranged between the first clamping member and the second clamping member, and is connected to the first clamping member and the second clamping member respectively. This connection method ensures that when the clamping member on one side moves, the clamping member on the other side will also move in the same way, thereby maintaining synchronization between the two. The main function of the linkage member 11 is to synchronously control the movement of the two clamping members. The specific type of the linkage member 11 can be in various forms, for example, connecting rod, gear transmission, screw transmission, etc. These mechanisms can effectively transmit the movement of one side to the other side to achieve synchronous movement.

[0033] In the process of the first clamping member and the second clamping member moving downward simultaneously in the vertical direction under the action of the driving force, when one of the first clamping member and the second clamping member contacts the upper surface of the object to be measured placed on the test bench, the one clamping member drives the other of the first clamping member and the second clamping member to continue to move downward via the linkage member 11 to clamp the object to be measured on the test bench. Specifically, during the movement process, since the upper surface of the object to be measured may be uneven, one of the first clamping member and the second clamping member will first contact the upper surface of the object to be measured. This contact will generate a physical feedback, indicating that the clamping member has reached the predetermined position, that is, contacted with the object to be measured. Once the first-contact clamping member contacts the object to be measured, it will generate a reaction force and move upward a short distance. At the same time, this clamping member transmits this movement to the other clamping member through the linkage member 11 (such as a connecting rod, gear 22 transmission or screw transmission, etc.). Due to the existence of the linkage member 11, the later-contact clamping member will move downward to clamp the object to be measured on the test bench.

[0034] In some embodiments, the present application can also link the first clamping member and the second clamping member to generate relative movement through the gear 22.

[0035] like Figure 2 As shown, the linkage 11 includes a gear 22 , and the test fixture 10 further includes a first rack 23 and a second rack 27 .

[0036] Among them, when a clamping member contacts the upper surface of the object to be measured, one clamping member is subjected to a reaction force and moves upward, so that one rack among the first rack 23 and the second rack 27 connected to one clamping member drives the gear 22 to rotate, so that the gear 22 drives the other rack among the first rack 23 and the second rack 27 to move downward, so that the other clamping member moves downward. The tooth patterns of the gear 22, the first rack 23 and the second rack 27 can be adjusted according to the accuracy of the test fixture 10 to ensure that the engagement between them can meet the clamping requirements of the test.

[0037] In some embodiments, the object to be tested may include an in-car DAB radio. Due to different specifications of in-car DAB radios, the upper surface may be uneven. Therefore, when one clamping member contacts the upper surface of the in-car DAB radio to be tested, one clamping member is subjected to a reaction force and moves upward, thereby driving the other clamping member to move downward, thereby clamping the in-car DAB radio to be tested.

[0038] In some embodiments, the first clamping member includes a first slider 24 , a first connecting block 25 and a first pressing plate 26 , and the second clamping member includes a second slider 28 , a second connecting block 29 and a second pressing plate 30 .

[0039] Specifically, the first slider 24 is provided with a first rack 23 on the side surface of the first slider 24 close to the gear 22, the first connecting block 25 is fixedly connected to the lower side end of the first slider 24 away from the first rack 23, and the first pressure plate 26 is fixedly connected to one end of the first connecting block 25 close to the test bench, and is used to contact the upper surface of the object to be measured so as to better fit with the upper surface of the object to be measured.

[0040] The second slider 28 is provided with a second rack 27 on the side surface of the second slider 28 close to the gear 22, and the second connecting block 29 is fixedly connected to the lower side of the second slider 28 away from the second rack 27. The second pressing plate 30 is fixedly connected to one end of the second connecting block 29 close to the test bench for contacting the upper surface of the object to be measured. The second pressing plate 30 can be a rectangular plate so as to better fit the upper surface of the object to be measured.

[0041] like Figure 3 As shown, the support structure includes a base plate 12 , a first vertical support, a second vertical support and the base plate 12 .

[0042] The bottom plate 12 is arranged on the test bench and can be arranged in a rectangular shape to serve as a support base for the entire test fixture 10 and provide a stable support surface for the entire support structure, ensuring that all components can be securely mounted thereon.

[0043] The first vertical bracket and the second vertical bracket are arranged on the base plate 12 and stand on both sides of the base plate 12 respectively to provide stable support. The bottom of the first vertical bracket and the second vertical bracket are designed as a rectangular structure and integrated with a triangular reinforcement structure to enhance stability. The connection between the first vertical bracket and the second vertical bracket is adjustable, allowing the user to adjust the spacing as needed to accommodate objects of different sizes.

[0044] The top plate is arranged above the first vertical bracket and the second vertical bracket to form a stable structure, and a first through hole is formed on the top plate. The rotating shaft of the motor 16 is connected to one end of the screw 17 via the first through hole. The first vertical bracket and the second vertical bracket are respectively formed with a first slide groove 14 and a second slide groove 15 on the opposite sides of each other. The main function of the first slide groove 14 and the second slide groove 15 is to serve as the running track of the first slider 24 and the second slider 28, so that the first slider 24 and the second slider 28 can slide freely in the vertical direction.

[0045] In the embodiment of the present application, the first and second chute grooves 14, 15 can be formed by directly excavating trapezoidal grooves in the physical structure of the first and second vertical brackets. The design of the trapezoidal grooves facilitates the stable sliding of the slider, because the trapezoidal shape can provide a certain degree of guidance and limiting effect when the slider slides, preventing the slider from shifting in the horizontal direction. Alternatively, the first and second chute grooves 14, 15 can be externally connected to the outside of the first and second vertical brackets, and the first and second chute grooves 14, 15 can be installed by additional means. These chute grooves can be separately manufactured components and then fixed to the brackets by bolts, welding, or other means.

[0046] like Figure 2 As shown, the test fixture 10 further includes an adjustment assembly, which includes a connecting rod 20 , a lifting plate 18 , a screw rod 17 , a motor 16 , an auxiliary plate and a support rod 19 .

[0047] The adjusting assembly is connected to the gear 22 to drive the gear 22 to move in the vertical direction, so as to drive the first slider 24 and the second slider 28 to slide in the vertical direction along the first slide groove 14 and the second slide groove 15 through the engagement between the gear 22 and the first rack 23 and the second rack 27 respectively.

[0048] One end of the connecting rod 20 is rotatably connected to the center of the gear 22. The connecting rod 20 can move in the vertical direction under the action of the driving force to drive the gear 22 to move in the vertical direction. A connecting piece 21 with a hollow connecting structure can be provided at the part where the connecting rod 20 is connected to the center of the gear 22, so that when the connecting rod 20 drives the gear 22 to move in the vertical direction, the gear 22 can also rotate freely.

[0049] The lifting plate 18 is fixedly connected to the other end of the connecting rod 20 , and a first threaded through hole and a third through hole are formed on the lifting plate 18 .

[0050] The screw 17 is arranged at the first through hole formed on the top plate. The rotating shaft of the motor 16 is connected to one end of the screw 17 via the first through hole and is threadedly connected to the first threaded through hole. By rotating the screw 17, the lifting plate 18 is driven to move along the axial direction of the screw 17 via the threaded connection. The lifting plate 18 is responsible for converting the rotational motion of the screw 17 into linear motion, thereby driving the connecting rod 20 and the gear 22 to move in the vertical direction, thereby driving the connecting rod 20 to move in the vertical direction.

[0051] The motor 16 , the rotating shaft of the motor 16 is directly connected to one end of the screw 17 or connected through some transmission device (such as a coupling) to ensure that the rotational power of the motor 16 can be efficiently transmitted to the screw 17 .

[0052] The auxiliary plate is arranged between the lifting plate 18 and the gear 22. One end of the auxiliary plate is fixedly connected to the inner surface of the first vertical bracket, and the other end of the auxiliary plate is fixedly connected to the inner surface of the second vertical bracket. A second through hole is formed in the auxiliary plate, and the connecting rod 20 passes through the second through hole. The auxiliary plate is mainly used to enhance the stability and rigidity of the structure. It is between the first vertical bracket and the second vertical bracket to provide additional support for the lifting plate 18 and the connecting rod 20.

[0053] A support rod 19 is inserted through the third through-hole of the lifting plate 18. One end of the support rod 19 is fixedly connected to the top plate, and the other end is fixedly connected to the auxiliary plate. The main function of the support rod 19 is to provide additional support to ensure the stability and rigidity of the entire structure during the lifting process. It is connected between the top plate and the auxiliary plate to form a stable support frame.

[0054] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed in the present application, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A test fixture, characterized in that: The test fixture includes: Support mechanism, used to fix to the top of the test bench, The first clamping member and the second clamping member are arranged on both sides of the support mechanism, and the first clamping member and the second clamping member can move in a vertical direction relative to the support mechanism. a linkage member, disposed between the first clamping member and the second clamping member, and connected to the first clamping member and the second clamping member respectively; In which, in the process of the first clamping member and the second clamping member moving downward simultaneously in the vertical direction under the action of the driving force, when one of the first clamping member and the second clamping member contacts the upper surface of the object to be measured placed on the test bench, the one clamping member drives the other of the first clamping member and the second clamping member to continue to move downward via the linkage member to clamp the object to be measured on the test bench.

2. The test fixture according to claim 1, characterized in that The linkage comprises a gear, Wherein, the test fixture further includes: a first rack, provided on a side surface of the first clamping member close to the gear, A second rack is provided on a side surface of the second clamping member close to the gear, When one clamping member contacts the upper surface of the object to be measured, the clamping member is subjected to a reaction force that drives the gear to rotate via one of the first rack and the second rack connected to the one clamping member, so that the gear drives the other rack of the first rack and the second rack to move downward, thereby driving the other clamping member to move downward.

3. The test fixture according to claim 2, characterized in that The first clamping member comprises: a first slider, wherein the first rack is provided on a side surface of the first slider close to the gear; a first connecting block, fixedly connected to one end of the first sliding block close to the test bench; A first pressing plate is fixedly connected to one end of the first connecting block close to the test bench and is used to contact the upper surface of the object to be tested. Wherein, the second clamping member comprises: a second slider, wherein the second rack is provided on a side surface of the second slider close to the gear; a second connecting block, fixedly connected to one end of the second sliding block close to the test bench; The second pressing plate is fixedly connected to one end of the second connecting block close to the test bench and is used for contacting the upper surface of the object to be tested.

4. The test fixture according to claim 3, characterized in that The support mechanism includes a first vertical bracket and a second vertical bracket, wherein a distance is set between the first vertical bracket and the second vertical bracket, and a first sliding groove and a second sliding groove are formed on opposite sides of the first vertical bracket and the second vertical bracket, respectively. The first slider is arranged in the first sliding groove, and the second slider is arranged in the second sliding groove, so that the first slider and the second slider can slide in the vertical direction along the first sliding groove and the second sliding groove.

5. The test fixture according to claim 4, characterized in that The test fixture further comprises: An adjusting assembly is connected to the gear to drive the gear to move in the vertical direction, so as to drive the first slider and the second slider to slide in the vertical direction along the first slide groove and the second slide groove through the engagement between the gear and the first rack and the second rack respectively.

6. The test fixture according to claim 5, characterized in that The adjustment component includes: A connecting rod, one end of which is rotatably connected to the center of the gear, and the connecting rod can move in a vertical direction under the action of a driving force to drive the gear to move in the vertical direction.

7. The test fixture according to claim 6, characterized in that The adjustment component also includes: a lifting plate, fixedly connected to the other end of the connecting rod, wherein a first threaded through hole is formed on the lifting plate; The screw rod is threadedly connected to the first threaded through hole. By rotating the screw rod, the lifting plate is driven to move along the axial direction of the screw rod via the threaded connection, thereby driving the connecting rod to move along the vertical direction.

8. The test fixture according to claim 7, characterized in that The support mechanism further comprises: a bottom plate, arranged on the test bench, with the first vertical bracket and the second vertical bracket arranged on two opposite sides of the bottom plate; A top plate is provided above the first vertical support and the second vertical support, and a first through hole is formed on the top plate. Wherein, the adjustment component further includes: A motor, wherein a rotating shaft of the motor is connected to one end of the screw rod via the first through hole, so as to drive the screw rod to rotate.

9. The test fixture according to claim 8, characterized in that The test fixture further comprises: An auxiliary plate is arranged between the lifting plate and the gear, one end of the auxiliary plate is fixedly connected to the inner surface of the first vertical bracket, and the other end of the auxiliary plate is fixedly connected to the inner surface of the second vertical bracket. A second through hole is formed on the auxiliary plate, and the connecting rod passes through the second through hole.

10. The test fixture according to claim 9, characterized in that The lifting plate is also formed with a third through hole. Wherein, the adjustment component further includes: A support rod is provided at the third through hole, one end of the support rod is fixedly connected to the top plate, and the other end of the support rod is fixedly connected to the auxiliary plate.

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