Testing device of clamp

Abstract

The invention relates to the technical field of clamp testing, and provides a clamp testing device which comprises a base; the first supporting seat is arranged on the base, the first supporting seat is used for fixing a workpiece to be detected, the second supporting seat is arranged on the base, is spaced from the first supporting seat and can move relative to the first supporting seat, a standard part is arranged on one side, facing the first supporting seat, of the second supporting seat, and the standard part can be aligned with one end of the workpiece to be detected. The inner spline can extend into an inner spline cavity of a workpiece to be detected; and the first sensor is fixed on the first supporting seat and arranged towards the second supporting seat, and the first sensor can measure the distance between the first supporting seat and the second supporting seat. Through the technical scheme of the application, unqualified tested workpieces can be screened out, so that the test result accuracy of the speed reducer assembly is further improved.

Description

Technical Field

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

[0002] With the rapid development of the new energy automobile industry, the demand for refined bench test verification of the reducer assembly is also increasing. The connection between the reducer assembly and the bench input end requires a transition fixture: an input internal spline flange, one end of which has an internal spline, and the end with the internal spline is connected to the external spline of the reducer input end, and the flange end is rigidly connected to the test bench input motor. The input motor of the test bench simulates the actual vehicle motor to drive the reducer to perform various types of high-speed and high-torque tests. The length of the internal spline of the input internal spline flange has a key influence on the test results.

[0003] Currently, most methods of measuring the internal spline length of the input internal spline flange are: manually measuring with a caliper, but the caliper may be slightly offset, that is, it is not coaxial with the input internal spline flange, which leads to errors in the measurement results. Further, unqualified input internal spline flanges will be used for testing, which will directly lead to different degrees of differences in the test results of the reducer assembly bench high-speed and high-torque tests. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a test device for a fixture, which can screen out unqualified workpieces to be tested, thereby further improving the accuracy of the test results of the reducer assembly.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] The present application provides a testing device for a fixture, comprising: a base; a first support seat, arranged on the base, the first support seat being used to fix a workpiece to be measured; a second support seat, arranged on the base, spaced apart from the first support seat, and movable relative to the first support seat, a standard part is provided on the side of the second support seat facing the first support seat, the standard part can be aligned with one end of the workpiece to be measured, and can extend into the inner spline cavity of the workpiece to be measured; a first sensor, fixed on the first support seat, arranged toward the second support seat, the first sensor can measure the distance between the first support seat and the second support seat.

[0007] As an implementation manner, the testing device further comprises a moving mechanism, wherein the moving mechanism is fixed on the base and connected to the second supporting seat, and can drive the second supporting seat to move.

[0008] As an embodiment, a second sensor is provided on the first support seat, and the second sensor is spaced apart from the outer periphery of the workpiece to be measured, so as to test the distance between the outer periphery of the workpiece to be measured and the second sensor; the standard part has an external spline, and the external spline can engage with the internal spline of the workpiece to be measured.

[0009] As an embodiment, a driving member is further provided on the side of the first support seat away from the second support seat, and the driving member is connected to the workpiece to be measured through a coupling. The driving member can drive the workpiece to be measured to rotate, and the standard part can rotate synchronously with the workpiece to be measured.

[0010] As an implementation manner, a third sensor is disposed on the first support seat, and the third sensor is spaced apart from the end of the workpiece to be measured, so as to test the distance between the end of the workpiece to be measured and the third sensor.

[0011] As an embodiment, the first support seat is also provided with a slideway and multiple sliders, the sliders can slide on the slideway, the multiple sliders are respectively provided with a first support rod and a second support rod, the end of the first support rod is provided with the second sensor, and the end of the second support rod is provided with the third sensor.

[0012] As an implementation manner, the second support rod is a telescopic structure.

[0013] As an implementation manner, the sliding block is provided with a special-shaped through hole, and the slideway is provided with a groove matched with the through hole.

[0014] As an implementation manner, a locking member is further provided on one side of the slider, and the locking member is used to lock the relative position of the slider and the slideway.

[0015] As an embodiment, the first support seat and the second support seat have the same height and are both bearing seats.

[0016] The technical solution of this application has the following effects:

[0017] By arranging a first support seat on the base, the first support seat can be used to fix the workpiece to be measured, which can improve the structural stability of the workpiece to be measured; a second support seat is also arranged on the base, the second support seat can move relative to the first support seat, the second support seat is spaced apart from the first support seat, and a standard part is arranged on the side of the second support seat facing the first support seat, the standard part can be aligned with one end of the workpiece to be measured, and gradually extend into the inner spline cavity of the workpiece to be measured during the movement of the second support seat; the testing device also includes a first sensor fixed on the first support seat, the first sensor is arranged toward the second support seat, and can measure the first support seat and the second support seat. The distance between the support seats, so that when the standard part is aligned with one end of the workpiece to be measured, the first sensor can collect the distance between the first support seat and the second support seat, and when the standard part extends into the inner spline cavity of the workpiece to be measured and abuts against the bottom wall of the inner spline cavity, the first sensor again collects the distance between the first support seat and the second support seat. The moving distance of the second support seat can be determined by the difference in the distances collected twice, which is also the effective length of the inner spline cavity of the workpiece to be measured, so that the length of the inner spline of the workpiece to be measured can be determined, eliminating manual measurement by caliper, reducing errors, and improving the accuracy of the test results of the reducer assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of an exploded structure of a fixture testing device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a fixture testing device provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a partial structure of a fixture testing device provided in an embodiment of the present application;

[0022] Figure 4 Schematic diagram of the exploded structure from different perspectives of a fixture testing device provided in an embodiment of the present application.

[0023] Icon: 1-base; 2-first support seat; 3-second support seat; 4-measured workpiece; 5-standard part; 6-first sensor; 7-second sensor; 8-third sensor; 9-moving mechanism; 91-slide rail; 92-fixed block; 93-threaded rod; 10-driving member; 11-slideway; 12-slider; 121-through hole; 13-first support rod; 14-second support rod; 15-coupling. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] like Figure 1 and 2 As shown, an embodiment of the present application provides a test device for a fixture, and a fixture refers to a device used to fix a processing object in a mechanical manufacturing process so that it occupies the correct position to accept construction or inspection. The entire test device includes a base 1 located at the bottom, and a first support seat 2 is provided on the base 1. The first support seat 2 can be used to fix a workpiece 4 to be measured, and can improve the structural stability of the workpiece 4 to be measured; a second support seat 3 is also provided on the base 1, and the second support seat 3 can move relative to the first support seat 2. The second support seat 3 is spaced apart from the first support seat 2, and a standard part 5 is provided on the side of the second support seat 3 facing the first support seat 2. The standard part 5 can be aligned with one end of the workpiece 4 to be measured, and gradually extend into the inner spline cavity of the workpiece 4 to be measured during the movement of the second support seat 3; the test device also includes a first sensor 6 fixed on the first support seat 2, and the first sensor 6 is arranged toward the second support seat 3, and can measure the first support seat 2 and the second support seat 2. The distance between the two support seats 3, so that when the standard part 5 is aligned with one end of the workpiece 4 to be measured, the first sensor 6 can collect the distance between the first support seat 2 and the second support seat 3, which can be recorded as C1; when the standard part 5 extends into the inner spline cavity of the workpiece 4 to be measured and abuts against the bottom wall of the inner spline cavity, the first sensor 6 again collects the distance between the first support seat 2 and the second support seat 3, which can be recorded as C2. The difference between the two collected distances can be used to determine the moving distance of the second support seat 3, which is also the effective length of the inner spline cavity of the workpiece 4 to be measured, thereby determining the length of the inner spline of the workpiece 4 to be measured, eliminating manual measurement by caliper, reducing errors, and improving the accuracy of the test results of the reducer assembly.

[0027] Optionally, the first support seat 2 is fixedly connected to the base 1, and may be connected by bolts or the like.

[0028] Optionally, the workpiece 4 to be measured may be an input internal spline flange or other types of flanges.

[0029] Optionally, the first sensor 6 may be a laser sensor, which may be connected to the host via an external power cord and transmit the distance difference between the first support base 2 and the second support base 3 to a screen of the host.

[0030] Optionally, the standard component 5 is coaxially arranged with the connection position between the first support seat 2 and the workpiece 4 to be measured, so that the standard component 5 can be easily inserted into the inner spline cavity of the workpiece 4 to be measured.

[0031] like Figure 2 and 4 As shown, as an embodiment, the testing device also includes a moving mechanism 9, which is fixed on the base 1 and connected to the second support seat 3. It can drive the second support seat 3 to move, and can move the standard part 5. The moving distance of the second support seat 3 is determined by the first sensor 6, thereby determining the length of the internal spline of the workpiece 4 to be measured.

[0032] like Figure 1 As shown, optionally, the moving mechanism 9 includes a slide rail 91, a fixed block 92 and a threaded rod 93. The fixed block 92 and the slide rail 91 are fixed on the base 1. The second support seat 3 is also connected to the slide rail 91. The threaded rod 93 passes through the fixed block 92 and is threadedly connected to the second support seat 3. The threaded rod 93 is connected to the fixed block 92 through a bearing. When the threaded rod 93 is driven to rotate, the second support seat 3 can slide on the slide rail 91, and the second support seat 3 can move equivalent to the first support seat 2.

[0033] Optionally, a locking bolt is further provided at one end of the threaded rod 93 to prevent the threaded rod 93 from accidentally rotating.

[0034] Optionally, the moving mechanism 9 may further include a linear motor, which is connected to the second support seat 3 , that is, the second support seat 3 may be driven by the linear motor to move along the slide rail 91 .

[0035] like Figure 3 As shown, optionally, the workpiece 4 to be measured includes a flange and a sleeve, the sleeve and the flange are integrally formed, the flange is fixed on the first support seat 2, and an internal spline is provided in the sleeve.

[0036] like Figure 1 and 3As shown, as an embodiment, a second sensor 7 is provided on the first support seat 2, and the second sensor 7 is spaced apart from the outer periphery of the workpiece 4 to test the distance between the outer periphery of the workpiece 4 and the second sensor 7; the standard part 5 has an external spline, and the external spline can be meshed with the internal spline of the workpiece 4. Since the standard part 5 has an external spline and can be meshed with the internal spline of the workpiece 4, before the standard part 5 is meshed with the workpiece 4, the distance between the second sensor 7 and the workpiece 4 can be determined by the second sensor 7, and the distance between the second sensor 7 and the workpiece 4 can be determined again after the meshing. The distance between the sensor 7 and the workpiece 4 to be measured can be determined, so as to determine whether the internal spline of the workpiece 4 to be measured is coaxial with the flange. The external spline of the standard part 5 is coaxial with the flange of the workpiece 4 to be measured. Therefore, if the sleeve of the workpiece 4 to be measured is not coaxial with the flange, when the external spline of the standard part 5 is engaged with the internal spline of the workpiece 4 to be measured, the sleeve of the workpiece 4 to be measured will extend along the external spline of the standard part 5. At this time, the distance between the sleeve and the second sensor 7 will change. If the difference in the change is within the range, it means that the workpiece 4 to be measured can be tested. If the offset is too large, the test cannot be carried out.

[0037] like Figure 1 and 4 As shown, as an embodiment, a driving member 10 is further provided on the side of the first support seat 2 away from the second support seat 3. The driving member 10 is connected to the workpiece 4 to be measured through a coupling 15. The driving member 10 can drive the workpiece 4 to be measured to rotate, and the standard member 5 can rotate synchronously with the workpiece 4 to be measured. By setting the driving member 10, the actual application scenario is simulated, so that the test result of the fixture is more real and accurate; in addition, when the driving member 10 rotates, it cooperates with the second sensor 7, and the second sensor 7 can detect the outer surface of the sleeve of the workpiece 4 to be measured, that is, to detect the radial direction of the sleeve, and determine the distance difference between each position on the same circumference of the outer circumference of the sleeve and the second sensor 7, so as to determine whether the outer surface of the sleeve of the workpiece 4 to be measured is flat, whether there is any unevenness, eliminates the manual measurement by dial indicator, reduces errors, and improves the accuracy of the test results of the reducer assembly.

[0038] like Figure 1 and 4As shown, in addition, by setting the coupling 15, on the one hand, it is convenient to connect the driving member 10 with the workpiece 4 to be measured, and on the other hand, because the coupling 15 has its own spring and can produce deformation, if the workpiece 4 to be measured is directly rigidly connected to the driving member 10, and the flange of the workpiece 4 to be measured is not coaxial with the sleeve, the external spline of the standard part 5 is meshed with the internal spline, and the driving member 10 will cause the workpiece 4 to be measured to vibrate violently when it is started; and through the deformation of the coupling 15, even if the flange of the workpiece 4 to be measured is not coaxial with the sleeve, when the internal spline is meshed with the external spline, the internal spline will extend along the external spline, and at the same time, it will also drive the deformation of the coupling 15, so that when the driving member 10 is started, the shaking degree of the workpiece 4 to be measured will be reduced, and the direct rigid connection of the workpiece 4 to the driving member 10 will be avoided.

[0039] Optionally, the workpiece 4 to be measured may be connected to the coupling 15 by bolts.

[0040] Optionally, the second sensor 7 is spaced apart from the sleeve of the workpiece 4 to be measured.

[0041] like Figure 1 and 3 As shown, as an embodiment, a third sensor 8 is provided on the first support seat 2, and the third sensor 8 is spaced apart from the end of the workpiece 4 to test the distance between the end of the workpiece 4 and the third sensor 8. When the driving member 10 rotates, it cooperates with the third sensor 8, and the third sensor 8 can detect the end face of the workpiece 4 to determine the distance difference between each position on the same circumference of the end face and the third sensor 8, so as to determine whether the end face of the workpiece 4 to be measured is flat, detect the axial length of the sleeve, eliminate manual measurement by dial indicator, reduce errors, and improve the accuracy of the test results of the reducer assembly.

[0042] Optionally, the second sensor 7 faces the radial direction of the workpiece 4 to be measured, and the third sensor 8 faces the axial direction of the workpiece 4 to be measured, so as to respectively detect the circumferential side and the end face of the workpiece 4 to be measured.

[0043] Optionally, the second sensor 7 and the third sensor 8 can be laser sensors, which can be connected to the host via an external power cord and transmit the fluctuation difference at each position on the outer peripheral side of the workpiece 4 and the fluctuation difference at each position on the end face to the screen of the host.

[0044] Optionally, the driving member 10 can be a stepper motor, which can rotate continuously. The second sensor 7 and the third sensor 8 can detect the circumferential and axial lengths of the sleeve. Of course, the stepper motor can also rotate at equally spaced angles, for example, 30 degrees, 60 degrees, and 90 degrees. The second sensor 7 and the third sensor 8 respectively take the positions of corresponding points of the workpiece 4 to be measured for comparison.

[0045] Optionally, the driving member 10 is connected to the base 1 via a motor support.

[0046] Optionally, the first sensor 6, the second sensor 7 and the third sensor 8 may work simultaneously, thereby improving detection efficiency.

[0047] like Figure 1 , 3 As shown in 4, as an embodiment, the first support seat 2 is also provided with a slideway 11 and multiple sliders 12, the slider 12 can slide on the slideway 11, and the multiple sliders 12 are respectively provided with a first support rod 13 and a second support rod 14, and the end of the first support rod 13 is provided with a second sensor 7, and the end of the second support rod 14 is provided with a third sensor 8. By setting the slideway 11 and multiple sliders 12, the slider 12 can slide on the slideway 11, thereby driving the second sensor 7 to move along the axial direction of the workpiece 4 to be measured, and different cross-sections of the sleeve can be taken respectively to improve the accuracy of detecting the circumferential fluctuation difference of the workpiece 4 to be measured; and the slider 12 drives the third sensor 8 to adjust the distance between the third sensor 8 and the end face of the workpiece 4 to be measured, and can also adapt to workpieces 4 of different specifications and sizes to be measured, thereby improving product adaptability.

[0048] Optionally, the slideway 11 is arranged above the first support seat 2 through a connecting rod.

[0049] As an embodiment, the second support rod 14 is a telescopic structure, so that the position of the third sensor 8 can be adjusted so that the third sensor 8 can be at different heights of the end face of the workpiece 4 to be measured. In this way, when the driving member 10 rotates again, the third sensor 8 can collect information on end faces of multiple different diameters, so as to determine the axial length of the sleeve of the workpiece 4 to be measured and the fluctuation of the end face, thereby increasing the accuracy of the test.

[0050] Optionally, the second support rod 14 includes a vertical section and a horizontal section, the horizontal section is connected to the vertical section, the vertical section can be retracted, a third sensor 8 is provided at the end of the horizontal section, and the horizontal section extends toward the end face of the workpiece 4 to be measured, so that the third sensor 8 is opposite to the end face of the workpiece 4 to be measured.

[0051] like Figure 3 As shown, as an embodiment, the slider 12 is provided with a special-shaped through hole 121, and the slideway 11 is provided with a groove adapted to the through hole 121. By providing the special-shaped through hole 121 on the slider 12, the contact area between the slider 12 and the slideway 11 is increased, thereby improving the stability between the slider 12 and the slideway 11.

[0052] Optionally, the irregular shape refers to a hole that is not a conventional circular or square hole. The cross-sectional shape of the through hole 121 in the embodiment of the present application is formed by connecting the short sides of two trapezoids. Of course, it can also be a cross-sectional shape of other irregular shapes.

[0053] As an embodiment, a locking member (not shown in the figure) is further provided on one side of the slider 12. By tightening the locking member, the slider 12 and the slideway 11 can be locked with each other to increase the stability between the slider 12 and the slideway 11.

[0054] Optionally, the locking member may be a butterfly screw.

[0055] As an implementation mode, the first support seat 2 and the second support seat 3 have the same height and are both bearing seats. The first support seat 2 and the second support seat 3 are designed as bearing seats, and the standard part 5 is connected to the second support seat 3 by bolts, and can rotate synchronously when engaged with the workpiece 4 to be measured; one side of the coupling 15 is bolted to the workpiece 4 to be measured, and the other side is connected to the bearing of the first support seat 2, and the output shaft of the driving member 10 is connected to the bearing, thereby realizing the power transmission of the driving member 10 to the workpiece 4 to be measured.

[0056] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A fixture testing device, characterized in that: include: Base; A first support seat is provided on the base, and the first support seat is used to fix the workpiece to be measured; A second support seat is arranged on the base, spaced apart from the first support seat, and movable relative to the first support seat, a standard part is arranged on a side of the second support seat facing the first support seat, the standard part can be aligned with one end of the workpiece to be measured, and can extend into the inner spline cavity of the workpiece to be measured; The first sensor is fixed on the first support base and is arranged toward the second support base. The first sensor can measure the distance between the first support base and the second support base.

2. The fixture testing device according to claim 1, characterized in that: The testing device further comprises a moving mechanism, which is fixed on the base and connected to the second supporting seat, and can drive the second supporting seat to move.

3. The fixture testing device according to claim 2, characterized in that: A second sensor is disposed on the first support seat, and the second sensor is spaced apart from the outer periphery of the workpiece to be measured, so as to measure the distance between the outer periphery of the workpiece to be measured and the second sensor; The standard part has an external spline, and the external spline can be engaged with the internal spline of the workpiece to be measured.

4. The fixture testing device according to claim 3, characterized in that: A driving member is further provided on the side of the first supporting seat away from the second supporting seat. The driving member is connected to the workpiece to be measured via a coupling. The driving member can drive the workpiece to be measured to rotate, and the standard part can rotate synchronously with the workpiece to be measured.

5. The fixture testing device according to claim 4, characterized in that: A third sensor is disposed on the first support seat. The third sensor is spaced apart from the end of the workpiece to be measured, so as to test the distance between the end of the workpiece to be measured and the third sensor.

6. The fixture testing device according to claim 5, characterized in that: The first support seat is also provided with a slideway and a plurality of sliders, the sliders can slide on the slideway, the plurality of sliders are respectively provided with a first support rod and a second support rod, the end of the first support rod is provided with the second sensor, and the end of the second support rod is provided with the third sensor.

7. The fixture testing device according to claim 6, characterized in that: The second support rod is a telescopic structure.

8. The fixture testing device according to claim 6, characterized in that: The sliding block is provided with a special-shaped through hole, and the slideway is provided with a groove matched with the through hole.

9. The fixture testing device according to claim 6, characterized in that: A locking piece is also provided on one side of the slider, and the locking piece is used to lock the relative position of the slider and the slideway.

10. The fixture testing device according to any one of claims 1 to 5, characterized in that: The first support seat and the second support seat have the same height and are both bearing seats.

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