Clamping tool and driving shaft test bench with same

Abstract

The utility model provides a clamping tool and a drive shaft test bench with the same, the clamping tool comprises a clamping seat, the clamping seat is internally provided with a through hole penetrating through the clamping seat along a first direction, the through hole is suitable for the penetration of a drive shaft, the inner wall of the through hole is provided with a mounting groove, and the mounting groove extends along the radial direction of the through hole; the clamping piece is movably arranged in the mounting groove in the radial direction of the through hole, and the end, facing the driving shaft, of the clamping piece is suitable for stretching into the through hole to abut against the driving shaft. According to the clamping tool disclosed by the utility model, the movable clamping piece is arranged, so that the driving shafts with different diameters can be clamped, the universality and the adaptability of the clamping tool can be improved, meanwhile, the development and design cost of the clamping tool can be reduced, the experiment efficiency can be improved, and the experiment period can be shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping tooling, in particular to a clamping tooling and a driving shaft test bench having the same. Background Art

[0002] The existing drive shaft test bench needs to use different types of clamping tools to clamp the drive shaft in order to adapt to drive shafts of various diameters. This results in a large number of clamping tools, which is not conducive to improving the versatility and adaptability of the clamping tools. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a clamping tool, which can improve versatility.

[0004] The utility model also provides a driving shaft test bench with the clamping tooling.

[0005] The clamping tool according to the embodiment of the utility model is used for a drive shaft test bench, and the drive shaft test bench comprises: a clamping seat, a through hole is provided in the clamping seat and passes through the clamping seat along a first direction, the through hole is suitable for passing the drive shaft, and a mounting groove is provided on the inner wall of the through hole, and the mounting groove extends along the radial direction of the through hole; a clamping member, the clamping member is movably arranged in the mounting groove along the radial direction of the through hole, and the end of the clamping member facing the drive shaft is suitable for extending into the through hole to abut against the drive shaft.

[0006] According to the clamping tool of the utility model, a movable clamping member is provided to clamp drive shafts of different diameters, thereby improving the versatility and adaptability of the clamping tool. At the same time, the development and design costs of the clamping tool can be reduced, and the experimental efficiency can be improved and the experimental cycle can be shortened.

[0007] According to some embodiments of the utility model, a plurality of mounting grooves are provided in the clamping seat, the plurality of mounting grooves are arranged at intervals along the circumference of the through hole, the number of the clamping members is multiple, and the plurality of mounting grooves corresponds one-to-one to the number of the plurality of clamping members.

[0008] According to some embodiments of the utility model, the mounting groove extends along the axial direction of the through hole, the mounting groove penetrates at least one side surface of the clamping seat in the axial direction of the through hole, and the clamping member is a plate body extending along the axial direction of the through hole.

[0009] According to some embodiments of the present utility model, the clamping tool includes: an adjusting member, the adjusting member is connected to the clamping member, and the adjusting member is used to drive the clamping member to move along the radial direction of the through hole.

[0010] According to some embodiments of the utility model, a matching hole is provided on the clamping seat, and the matching hole extends along the radial direction of the through hole. In the radial direction of the through hole, the outer end of the matching hole passes through the outer peripheral surface of the clamping seat, and the inner end of the matching hole is connected to the mounting groove. The adjusting member is passed through the matching hole to be connected to the clamping member.

[0011] According to some embodiments of the utility model, the mating hole is a threaded hole, the adjusting member is threadedly mated with the mating hole, and the clamping tool further includes: an elastic member, the elastic member is connected between the clamping member and the clamping seat, and the elastic member is configured to push the clamping member to abut against the adjusting member.

[0012] According to some optional embodiments of the utility model, the clamping member is provided with a boss protruding along the axial direction of the through hole at one end along the axial direction of the through hole, and a receiving hole is provided in the clamping seat, and the receiving hole is connected with the mounting groove. The elastic member is arranged in the receiving hole, and in the radial direction of the through hole, the elastic member is located on the side of the boss facing the through hole and abuts against the boss.

[0013] According to some embodiments of the present invention, along the radial inward direction of the through hole, the cross-sectional area of ​​the clamping member at one end facing the drive shaft and perpendicular to the axial direction of the through hole gradually decreases.

[0014] According to some embodiments of the utility model, the clamping tool further includes: a mounting seat, and the mounting seat is detachably connected to the clamping seat.

[0015] According to the second aspect of the embodiment of the utility model, the drive shaft test bench includes: a test bench; a fixed seat, which is arranged on the test bench; and a clamping tool according to the first aspect of the utility model, the clamping tool is fixed to the test bench through the fixed seat, the number of the clamping tools is two, and the two clamping tools are arranged at intervals along the first direction and are respectively used to clamp the two ends of the drive shaft.

[0016] According to the drive shaft test bench of the utility model, by setting the clamping fixture of the first aspect embodiment mentioned above and arranging a movable clamping part on the clamping fixture, drive shafts of different diameters can be clamped, thereby improving the versatility and adaptability of the clamping fixture. At the same time, the development and design costs of the clamping fixture can be reduced, and the experimental efficiency can be improved and the experimental cycle can be shortened.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a drive shaft test bench and a drive shaft according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of the clamping fixture shown in ;

[0020] Figure 3 yes Figure 2 Schematic diagram of the clamping seat shown in .

[0021] Reference numerals:

[0022] 100. Clamping tooling;

[0023] 10. Clamping seat; 11. Through hole; 12. Mounting slot; 13. Matching hole; 14. Third fixing hole;

[0024] 20. Clamping member; 21. Boss;

[0025] 30. Adjustment parts;

[0026] 40. Elastic parts;

[0027] 50. mounting seat; 51. first fixing hole; 52. second fixing hole;

[0028] 200, stand;

[0029] 300, fixed seat;

[0030] 1000. Drive shaft test bench;

[0031] 2000. Drive shaft. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] Please refer to the following Figure 1-3 A clamping tool 100 according to an embodiment of the present invention is described.

[0034] Reference Figure 1 , Figure 2 and Figure 3 According to the embodiment of the utility model, the clamping tool 100 is used for a drive shaft test bench 1000. The clamping tool 100 includes: a clamping seat 10 and a clamping member 20.

[0035] Specifically, the clamping seat 10 is provided with a Figure 3The through hole 11 of the clamping seat 10 is passed through (in the left and right directions as shown in the figure), and the through hole 11 is suitable for passing the drive shaft 2000. The inner wall of the through hole 11 is provided with a mounting groove 12, and the mounting groove 12 is along the axial direction of the through hole 11 (as shown in the figure). Figure 3 the clamping member 20 is movably disposed in the mounting groove 12 along the radial direction of the through hole 11, and one end of the clamping member 20 facing the drive shaft 2000 is adapted to extend into the through hole 11 to abut against the drive shaft 2000.

[0036] For example, Figure 1 , Figure 2 and Figure 3 As shown, the clamping seat 10 is cylindrical, the axial direction of the clamping seat 10 is the left-right direction, a circular through hole 11 is provided in the clamping seat 10 which penetrates the clamping seat 10 along the left-right direction, the drive shaft 2000 passes through the through hole 11, the mounting groove 12 extends along the axial direction of the through hole 11, and the mounting groove 12 is connected to the through hole 11.

[0037] In the design and manufacture of automotive parts, the torsional stiffness and circumferential clearance of the drive shaft 2000 are important indicators that affect the performance of the entire vehicle. Since the drive shaft 2000 assembly includes two constant velocity universal joints, its torsional stiffness and circumferential clearance cannot be obtained through preliminary simulation and can only be obtained through experiments. When performing circumferential clearance measurement tests and torsional stiffness tests on the drive shaft 2000, the clamping fixture 100 is required to clamp the drive shaft 2000.

[0038] When using the clamping tool 100 to clamp the drive shaft 2000, first place the clamping member 20 in the mounting groove 12, then pass the drive shaft 2000 through the through hole 11, and finally, adjust the clamping member 20 to the position of the mounting groove 12 to clamp the drive shaft 2000. At this time, the work of clamping the drive shaft 2000 by the clamping tool 100 is completed.

[0039] The clamping fixture 100 of this embodiment is provided with a movable clamping member 20. By adjusting the different positions of the clamping member 20 in the mounting groove 12, the drive shafts 2000 of different diameters can be clamped, thereby improving the versatility and adaptability of the clamping fixture 100. At the same time, there is no need to design and develop the clamping fixture 100 for a certain drive shaft 2000, thereby reducing the development and design costs of the clamping fixture 100. In addition, the clamping fixture 100 can realize multiple experiments on the drive shaft 2000, thereby improving the experimental efficiency and shortening the experimental cycle.

[0040] According to the clamping tool 100 of the embodiment of the utility model, a movable clamping member 20 is provided, which can clamp the driving shaft 2000 of different diameters, thereby improving the versatility and adaptability of the clamping tool 100. At the same time, it can reduce the development and design costs of the clamping tool 100, improve experimental efficiency, and shorten the experimental cycle.

[0041] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The clamping seat 10 is provided with a plurality of mounting grooves 12, that is, the clamping seat 10 is provided with two, three or four or more mounting grooves 12, and the plurality of mounting grooves 12 are arranged at intervals along the circumference of the through hole 11, and the number of the clamping members 20 is multiple, that is, the number of the clamping members 20 can be two, three or four or more, and the plurality of mounting grooves 12 corresponds one to one to the number of the plurality of clamping members 20.

[0042] In this way, the mounting groove 12 provides a placement position for the clamping member 20, which facilitates the arrangement of the clamping member 20. The multiple clamping members 20 cooperate together to ensure that the axis of the drive shaft 2000 is concentric with the hole center of the through hole 11, thereby ensuring the accuracy of the test of the drive shaft 2000. In addition, each mounting groove 12 is provided with a clamping member 20, and this arrangement is reasonable, which can ensure the clamping strength of the clamping member 20 clamping the drive shaft 2000.

[0043] For example, Figure 2 and Figure 3 As shown, there are eight mounting grooves 12 , which are arranged at intervals along the circumference of the through hole 11 . There are eight clamping members 20 , and one clamping member 20 is disposed in each mounting groove 12 .

[0044] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The mounting groove 12 is arranged along the axial direction of the through hole 11 (eg Figure 2 The clamping member 20 extends in the axial direction of the through hole 11, and the clamping member 20 is a plate extending in the axial direction of the through hole 11. Therefore, the extending direction of the mounting groove 12 is the same as the extending direction of the clamping member 20, so that the clamping member 20 can be installed in the mounting groove 12 and can move normally in the mounting groove 12.

[0045] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The mounting groove 12 penetrates the clamping seat 10 in the axial direction of the through hole 11 (such as Figure 3 In other words, the mounting groove 12 can penetrate the surface of the clamping seat 10 on one side in the axial direction of the through hole 11, and the mounting groove 12 can also penetrate the two side surfaces of the clamping seat 10 in the axial direction of the through hole 11. Thus, the mounting groove 12 penetrates the surface of the clamping seat 10, which can facilitate the installation of the clamping member 20 into the mounting groove 12, thereby facilitating the installation of the clamping member 20.

[0046] For example, Figure 2 and Figure 3As shown, the installation groove 12 passes through the left side surface of the clamping seat 10. When the clamping member 20 is installed in the installation groove 12, the clamping member 20 moves from left to right and is installed in the installation groove 12.

[0047] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 The clamping tool 100 includes an adjusting member 30, which is connected to the clamping member 20 and is used to drive the clamping member 20 to move radially along the through hole 11. Thus, the adjusting member 30 can adjust the position of the clamping member 20 in the mounting groove 12, thereby ensuring the degree of tightness of the clamping member 20 clamping the driving shaft 2000, thereby facilitating the clamping and disassembly of the driving shaft 2000.

[0048] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 A matching hole 13 is provided on the clamping seat 10, and the matching hole 13 extends along the radial direction of the through hole 11. In the radial direction of the through hole 11, the outer end of the matching hole 13 passes through the outer circumferential surface of the clamping seat 10, and the inner end of the matching hole 13 is connected to the mounting groove 12. The adjusting member 30 is passed through the matching hole 13 to be connected to the clamping member 20.

[0049] In this way, the matching hole 13 is connected to the mounting groove 12, which can ensure that the adjusting member 30 can be connected to the clamping member 20 when passing through the matching hole 13, thereby ensuring that the adjusting member 30 can drive the clamping member 20 to move. At the same time, the extension direction of the matching hole 13 is the same as the moving direction of the clamping member 20 in the mounting groove 12, thereby further ensuring that the adjusting member 30 can drive the clamping member 20 to move normally in the mounting groove 12.

[0050] For example, Figure 2 and Figure 3 As shown, a plurality of mating holes 13 are provided on the outer circumferential surface of the clamping seat 10 , and the plurality of mating holes 13 are arranged at intervals along the outer circumferential surface of the clamping seat 10 . The mating holes 13 extend along the radial direction of the through hole 11 , and the mating holes 13 connect the mounting groove 12 and the outer circumferential surface of the clamping seat 10 .

[0051] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The matching hole 13 is a threaded hole, and the adjusting member 30 is threadedly matched with the matching hole 13. The clamping tool 100 may also include: an elastic member 40, the elastic member 40 is connected between the clamping member 20 and the clamping seat 10, and the elastic member 40 is configured to push the clamping member 20 to abut against the adjusting member 30.

[0052] In this way, the threaded fitting has a simple structure, which facilitates the installation of the adjusting member 30. At the same time, the threaded fitting can accurately adjust the position of the adjusting member 30 in the fitting hole 13, so that the degree of tightness of the clamping member 20 clamping the driving shaft 2000 can be accurately adjusted, thereby ensuring the experimental accuracy of the driving shaft 2000. At the same time, the elastic member 40 can reset the position of the clamping member 20 in the installation groove 12, so that the clamping member 20 can move back and forth within the internal stroke of the installation groove 12. Preferably, the elastic member 40 is a spring, which has low cost and is convenient for mass production.

[0053] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The clamping member 20 is arranged in the axial direction of the through hole 11 (eg Figure 2 One end of the through hole 11 shown in the left and right directions) (such as Figure 2 The right end of the clamping member 20 shown in the figure is provided with a boss 21 protruding axially along the through hole 11, and a receiving hole (not shown in the figure) is provided in the clamping seat 10, which is connected to the mounting groove 12. The elastic member 40 is arranged in the receiving hole. In the radial direction of the through hole 11, the elastic member 40 is located on the side of the boss 21 facing the through hole 11 and abuts against the boss 21.

[0054] In this way, the elastic member 40 pushes the boss 21 to move, thereby pushing the clamping member 20 to reset. Therefore, a small-volume elastic member 40 can be set to push the clamping member 20, thereby reducing the space occupied by the elastic member 40. At the same time, the accommodating hole is connected to the mounting groove 12. When the elastic member 40 pushes the boss 21 to move, it can be ensured that the clamping member 20 can be pushed to move in the mounting groove 12.

[0055] For example, Figure 2 and Figure 3 As shown, the right end of the clamping member 20 is provided with a boss 21 extending to the right, the boss 21 is provided at one end of the clamping member 20 away from the through hole 11, the receiving hole is provided in the clamping seat 10 and communicates with the mounting groove 12, one end of the elastic member 40 abuts against the hole wall of the receiving hole, and the other end of the elastic member 40 abuts against the boss 21. Preferably, the outer diameter of the elastic member 40 is consistent with the width of the clamping member 20, so that the ends of the elastic member 40 abutting against the clamping member can abut against the surface of the clamping member 20, thereby ensuring the effect of the elastic member 40 pushing the clamping member 20.

[0056] According to some embodiments of the present invention, referring to Figure 2 and Figure 3, along the radial inward direction of the through hole 11, the cross-sectional area of ​​the clamping member 20 in the axial direction of the through hole 11 at one end of the driving shaft 2000 gradually decreases. Thus, it can be ensured that one end of the clamping member 20 can extend into the groove of the spline shaft of the driving shaft 2000, thereby effectively preventing the driving shaft 2000 from rotating relative to the clamping seat 10.

[0057] For example, Figure 2 and Figure 3 As shown, along the radially inward direction of the through hole 11, the cross section of the clamping member 20 that is perpendicular to the axial direction of the through hole 11 and that faces one end of the driving shaft 2000 is formed into an arc shape.

[0058] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 3 The clamping tool 100 further includes: a mounting seat 50, which is detachably connected to the clamping seat 10. Thus, the installation and disassembly of the clamping seat 10 and the mounting seat 50 can be facilitated, thereby improving the assembly efficiency of the clamping seat 10.

[0059] Furthermore, if Figure 2 and Figure 3 As shown, the left side surface of the mounting seat 50 is provided with a plurality of first fixing holes 51, which are arranged at intervals along the circumference of the left side surface of the mounting seat 50, and the first fixing holes 51 penetrate the mounting seat 50 in the left-right direction. The left side surface of the clamping seat 10 is provided with a plurality of third fixing holes 14, which correspond to the number of the third fixing holes 14 and the first fixing holes 51 in a one-to-one manner, and the plurality of third fixing holes 14 are arranged at intervals along the circumference of the left side surface of the clamping seat 10, and the third fixing holes 14 extend in the left-right direction. Thus, the bolt passes through the first fixing holes 51 and the third fixing holes 14 to connect the clamping seat 10 with the mounting seat 50, so that the connection reliability of the clamping seat 10 and the mounting seat 50 can be ensured.

[0060] Preferably, the first fixing hole 51 is a countersunk hole, which can prevent the bolt passing through the first fixing hole 51 from being exposed outside the left side surface of the mounting seat 50 and affecting the connection between the clamping fixture 100 and the drive shaft test bench 1000 .

[0061] According to the drive shaft test bench 1000 of the second embodiment of the utility model, refer to Figure 1 , Figure 2 and Figure 3 , comprising: a stand 200, a fixing seat 300 and a clamping tool 100 of the first aspect of this embodiment. The fixing seat 300 is arranged on the stand 200; the clamping tool 100 is fixed to the stand 200 through the fixing seat 300, and the number of the clamping tools 100 is two, and the two clamping tools 100 are arranged along the first direction (such as Figure 2The two ends of the drive shaft 2000 are arranged at intervals and are respectively used to clamp the two ends of the drive shaft 2000 (such as Figure 1 The left and right ends of the drive shaft 2000 shown).

[0062] For example, Figure 1 , Figure 2 and Figure 3 As shown, two fixing seats 300 are provided on the stand 200, and the two fixing seats 300 are arranged at intervals along the left-right direction. Two clamping fixtures 100 are respectively connected to the corresponding fixing seats 300, and the clamping fixtures 100 are connected between the two fixing seats 300. The two clamping fixtures 100 clamp the two ends of the driving shaft 2000.

[0063] According to the drive shaft test bench 1000 of the embodiment of the utility model, by setting the clamping fixture 100 of the first aspect embodiment mentioned above, a movable clamping member 20 is set on the clamping fixture 100, so that the drive shaft 2000 of different diameters can be clamped, thereby improving the versatility and adaptability of the clamping fixture 100. At the same time, the development and design cost of the clamping fixture 100 can be reduced, and the experimental efficiency can be improved and the experimental cycle can be shortened.

[0064] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, the fixing seat 300 is fixed on the stand 200, and a plurality of second fixing holes 52 are provided on the left side surface of the mounting seat 50. The plurality of second fixing holes 52 are arranged at intervals along the circumference of the left side surface of the mounting seat 50, and the second fixing holes 52 penetrate the mounting seat 50 along the left-right direction. The fixing seat 300 is provided with fourth fixing holes (not shown in the figure) corresponding to the second fixing holes 52 one by one, and bolts pass through the fourth fixing holes and the second fixing holes 52 to fix the mounting seat 50 to the fixing seat 300.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A clamping fixture for a drive shaft test bench, characterized in that: include: A clamping seat, wherein a through hole is provided in the clamping seat and passes through the clamping seat in a first direction, the through hole is suitable for passing a driving shaft, and a mounting groove is provided on an inner wall of the through hole, and the mounting groove extends in a radial direction of the through hole; A clamping member is movably arranged in the mounting groove along the radial direction of the through hole, and one end of the clamping member facing the drive shaft is suitable for extending into the through hole to abut against the drive shaft.

2. The clamping tool according to claim 1, characterized in that: A plurality of mounting grooves are arranged in the clamping seat, and the plurality of mounting grooves are arranged at intervals along the circumference of the through hole. There are a plurality of clamping members, and the plurality of mounting grooves corresponds to the plurality of clamping members in a one-to-one manner.

3. The clamping tool according to claim 1, characterized in that: The mounting groove extends along the axial direction of the through hole, the mounting groove penetrates at least one side surface of the clamping seat in the axial direction of the through hole, and the clamping member is a plate body extending along the axial direction of the through hole.

4. The clamping tool according to any one of claims 1 to 3, characterized in that: include: An adjusting member is connected to the clamping member, and is used to drive the clamping member to move along the radial direction of the through hole.

5. The clamping tool according to claim 4, characterized in that: The clamping seat is provided with a matching hole, the matching hole extending in the radial direction of the through hole, the outer end of the matching hole passing through the outer peripheral surface of the clamping seat in the radial direction of the through hole, and the inner end of the matching hole communicating with the mounting groove. The adjusting member is inserted into the matching hole to be connected with the clamping member.

6. The clamping tool according to claim 5, characterized in that: The matching hole is a threaded hole, and the adjusting piece is threadedly matched with the matching hole. The clamping tool further includes an elastic member connected between the clamping member and the clamping seat, and the elastic member is configured to push the clamping member to abut against the adjusting member.

7. The clamping tool according to claim 6, characterized in that: The clamping member is provided with a boss protruding along the axial direction of the through hole at one end along the axial direction of the through hole, and a receiving hole is provided in the clamping seat, and the receiving hole is communicated with the mounting groove. The elastic member is disposed in the accommodating hole. In the radial direction of the through hole, the elastic member is located on a side of the boss facing the through hole and abuts against the boss.

8. The clamping tool according to any one of claims 1 to 3, characterized in that: In the radially inward direction of the through hole, the cross-sectional area of ​​the clamping member which is perpendicular to the axial direction of the through hole and faces one end of the driving shaft gradually decreases.

9. The clamping tool according to claim 1, characterized in that: Also includes: A mounting seat is detachably connected to the clamping seat.

10. A drive shaft test bench, characterized in that: include: Stand; A fixing seat, the fixing seat being arranged on the stand; According to the clamping tool according to any one of claims 1-9, the clamping tool is fixed to the stand through the fixing seat, the number of the clamping tool is two, the two clamping tools are arranged at intervals along the first direction, and are respectively used to clamp the two ends of the driving shaft.

Images