Clamping mechanism for sample wear test

Abstract

The utility model relates to the technical field of abrasion test, concretely is the clamping mechanism of sample abrasion experiment, including fixed base, thread sleeve and drive block, the fixed base inside lower extreme one side welds and places the platform, the fixed base outside upper end thread connection has the thread sleeve, the thread sleeve inner wall upper end one side interference fit has supported bearing, supported bearing inner ring interference fit has the apron, the apron lower extreme is provided with the drive block of circular array distribution, the apron lower end face is opened with the guide groove of circular array distribution, the guide groove inner wall one side thread connection has the plug, the guide groove inside slide installation has the guide block, the fixed base outer wall lower extreme is provided with the screw rod of circular array distribution, the screw rod outside sets up and clamps the piece, the slide groove is seted up in the outer wall one side of clamping piece, through single thread sleeve rotation drive, can realize the multi -point clamping of sample fixed, has reduced the clamping procedure of sample, to be able to improve the clamping efficiency of sample.

Description

Technical Field

[0001] This utility model relates to the field of wear testing technology, and specifically to a clamping mechanism for sample wear testing. Background Technology

[0002] Sample wear testing is an important method for evaluating the wear resistance of materials in fields such as materials science and mechanical engineering. By simulating the friction and wear environment of materials in actual use, it measures parameters such as wear amount and wear rate to determine the wear resistance of the material, providing a basis for material selection, product design and process optimization. According to the friction mode, it can be divided into sliding wear test, rolling wear test, abrasive wear test and impact wear test. Among them, the sliding wear test simulates the wear when the surfaces of two objects slide relative to each other. The sample can make reciprocating linear motion on a fixed surface. When the two contact surfaces slide relative to each other, the material surface gradually wears down due to mechanical, chemical or thermal effects. By controlling the sliding conditions (such as load, speed and time), the wear amount of the material is measured, thereby quantifying its wear resistance, and the wear mechanism can be judged by combining the surface morphology analysis.

[0003] CN219161818U discloses a sample clamping device for a friction and wear testing machine, comprising: a square outer frame and a clamping assembly disposed within the square outer frame. The clamping assembly includes: two opposing sliders slidably connected within the square frame; and at least two locking screws threaded through the square outer frame and in abutting contact with the sliders. This invention features a compact overall design and uses threaded locking to fix the sample, avoiding the risk of sample damage caused by mechanically forcibly removing the sample. It also solves the technical problem of time-consuming sample fixing and post-test sample retrieval.

[0004] While existing clamping structures offer numerous advantages during use, they still suffer from several drawbacks. Their sample clamping efficiency is not perfect, requiring multiple steps to achieve sample clamping and fixation, resulting in a complex clamping process and low sample clamping efficiency. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a clamping mechanism for sample wear testing.

[0006] The technical solution adopted by this utility model to solve its technical problem is a clamping mechanism for sample wear testing, including a fixed base, a threaded sleeve, and a driving block. A placement platform is welded to one side of the lower end of the fixed base. A threaded sleeve is threadedly connected to the upper end of the outer side of the fixed base. A support bearing is interference-fitted to one side of the inner wall of the threaded sleeve. A cover plate is interference-fitted to the inner ring of the support bearing. A driving block with a circular array is provided at the lower end of the cover plate. A guide groove with a circular array is opened on the lower end face of the cover plate. A plug is threadedly connected to one side of the inner wall of the guide groove. A guide block is slidably installed inside the guide groove. A screw with a circular array is provided at the lower end of the outer wall of the fixed base. A clamping member is sleeved on the outer side of the screw. A sliding groove is opened on one side of the outer wall of the clamping member.

[0007] By adopting the above technical solution, the operator places the sample on the upper part of the placement platform, ensuring that the sample and the center point of the placement platform are perpendicular. The operator manually rotates the threaded sleeve, causing the threaded sleeve to move vertically downwards along with the cover plate. This movement is synchronized with the movement of the drive block, allowing the slider to slide inside the groove. Furthermore, the drive block and the inclined surface of the clamping component come into contact with each other, driving the clamping component to move radially towards the placement platform. This allows the clamping component to hold and fix the outer wall of the sample placed on the upper part of the placement platform, maintaining the stability of the sample's position on the upper surface of the placement platform. This ensures the stability of the sample's position during subsequent wear tests, guaranteeing the accuracy of the wear test. Moreover, the single threaded sleeve rotation drive enables multi-point clamping and fixing of the sample, reducing the sample clamping steps and thus improving the sample clamping efficiency.

[0008] Specifically, the lower end of the outer wall of the fixing base is welded with a circular array of fixing corner pieces, and the fixing corner pieces have through holes inside.

[0009] By adopting the above technical solution, the staff can use external bolts to pass through the through holes, so that the fixing seat can be fixed to the upper part of the platform of the wear testing machine by fixing corner pieces and bolts, thus ensuring the stability of the fixing seat position.

[0010] Specifically, the upper surfaces of the placement platform and the cover plate are on the same horizontal plane, the upper surface of the clamping member is higher than the upper surface of the placement platform, and the end of the screw is threaded to the lower side of the outer wall of the placement platform.

[0011] By adopting the above technical solution, the sample can be placed on the upper part of the placement platform. The clamping part protrudes from the placement platform and can clamp and fix the outer side of the sample. After the clamping part clamps and fixes the sample, the upper end surface of the sample is higher than the upper end surface of the clamping part. When the cover plate moves vertically with the threaded sleeve, it can avoid the cover plate from obstructing the sample and ensure the protrusion of the sample.

[0012] Specifically, a first support spring is sleeved on the outside of the screw, and the two ends of the first support spring are in contact with the outer wall of the placement platform and the clamping member, respectively, and the clamping member is elastically connected to the placement platform through the first support spring.

[0013] By adopting the above technical solution, the first support spring can compress the clamping component, ensuring that the position of the clamping component is relatively stable. When the drive block moves downward and pushes the clamping component to move radially, it can compress and store energy on the first support spring. After the drive block resets, the first support spring can release its elastic force to push the clamping component to reset and loosen the clamping of the sample. The gap between the lower end face of the clamping component and the lower end of the inner wall of the fixed seat is 0.1 mm, and the radial movement of the clamping component is ensured to be horizontal through the screw and the fixed seat.

[0014] Specifically, a slider is welded to the outer inclined surface of the drive block. The slider has a convex shape and is slidably installed inside the groove.

[0015] By adopting the above technical solution, the cooperation between the inclined surface and the convex slider converts the vertical movement of the drive block into the radial movement of the clamping component, thereby forming an efficient transmission for the rotation adjustment of the threaded sleeve to drive the clamping component. Furthermore, the groove and slider restrict the relative movement direction of the drive block and the clamping component, preventing the cover plate from rotating along with the threaded sleeve, thus ensuring the stability of the vertical movement of the cover plate.

[0016] Specifically, a second support spring is provided inside the guide groove, and spring mounting grooves are provided on one side of the outer wall of the guide block and one side of the inner wall of the guide groove. The second support spring is located inside the spring mounting groove, and the guide block is elastically connected to the inner wall of the guide groove through the second support spring.

[0017] By adopting the above technical solution, the second support spring provides elastic preload to the drive block, and the elastic force of the second support spring is greater than that of the first support spring. Thus, when the cover plate carries the drive block vertically downward, the elastic force of the second support spring keeps the guide block relatively stable and drives the clamping component to move radially according to the slider and the groove. Since the second support spring can absorb the impact force of the clamping component, it can reduce the rigid collision between the drive block and the guide groove and avoid causing crush damage to the outside of the sample.

[0018] Specifically, a connector is welded to one side of the upper end of the outer wall of the drive block, and the connector is connected to the guide block by screws.

[0019] By adopting the above technical solution, the screw connection facilitates the disassembly and replacement of the drive block and the guide block, and the connection and the guide block ensure that the drive block is in a stable relative position on the lower end face of the cover plate.

[0020] The beneficial effects of this utility model are: The clamping mechanism for the sample wear test described in this utility model can achieve multi-point clamping and fixing of the sample through a single threaded sleeve rotation drive, reducing the sample clamping steps and thus improving the sample clamping efficiency.

[0021] The clamping mechanism for the sample wear test described in this utility model can clamp and fix the outer wall of the sample placed on the upper end of the placement platform, maintain the stability of the sample position on the upper end of the placement platform, ensure the stability of the sample position during the subsequent wear test, and guarantee the accuracy of the wear test. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the main body of the fixing base structure of this utility model; Figure 2 This is an exploded view of the fixing base structure of this utility model; Figure 3 This is a disassembly diagram of the fixing base structure of this utility model; Figure 4 This is an exploded view of the threaded sleeve structure of this utility model.

[0024] In the diagram: 1. Fixed base; 11. Placement platform; 12. Fixed corner piece; 13. Screw; 14. First support spring; 15. Clamping piece; 16. Slide groove; 2. Threaded sleeve; 21. Support bearing; 22. Cover plate; 23. Guide groove; 24. Plug; 25. Second support spring; 26. Drive block; 27. Slider; 28. Connector; 29. ​​Guide block. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] To save manpower and improve efficiency, as one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the clamping mechanism for the sample wear test of this utility model includes a fixed base 1, a threaded sleeve 2, and a driving block 26. A placement platform 11 is welded to one side of the lower end inside the fixed base 1. A threaded sleeve 2 is threadedly connected to the upper end of the outer side of the fixed base 1. A support bearing 21 is interference-fitted to one side of the upper end of the inner wall of the threaded sleeve 2. A cover plate 22 is interference-fitted to the inner ring of the support bearing 21. A driving block 26 is arranged in a circular array at the lower end of the cover plate 22. A guide groove 23 is arranged in a circular array on the lower end face of the cover plate 22. A plug 24 is threadedly connected to one side of the inner wall of the guide groove 23. The plug 24 restricts the position of the guide block 29. The guide block 29 is slidably installed inside the guide groove 23. A screw 13 is arranged in a circular array at the lower end of the outer wall of the fixed base 1. A clamping member 15 is sleeved on the outer side of the screw 13. A sliding groove 16 is opened on one side of the outer wall of the clamping member 15.

[0027] In use, the operator places the sample on the upper end of the placement platform 11, ensuring that the sample and the center point of the placement platform 11 are perpendicular. The operator manually rotates the threaded sleeve 2, causing the threaded sleeve 2, along with the cover plate 22, to move vertically downwards. This movement is synchronized with the movement of the drive block 26, allowing the slider 27 to slide inside the groove 16. The drive block 26 and the inclined surface of the clamping member 15 come into contact with each other, driving the clamping member 15 to move radially towards the placement platform 11. This allows the clamping member 15 to clamp and fix the outer wall of the sample placed on the upper end of the placement platform 11, maintaining the stability of the sample's position on the upper surface of the placement platform 11. This ensures the stability of the sample's position during subsequent wear tests, guaranteeing the accuracy of the wear test. Furthermore, the single rotation drive of the threaded sleeve 2 enables multi-point clamping and fixing of the sample, reducing the number of clamping steps and improving the clamping efficiency.

[0028] To fix the usage location, for example, such as Figure 1 As shown, a circular array of fixing corner pieces 12 are welded to the lower end of the outer wall of the fixing base 1, and through holes are opened inside the fixing corner pieces 12.

[0029] During use, the operator can use the external bolts to pass through the through holes, so that the fixing seat 1 is fixed to the upper part of the platform of the wear testing machine by fixing corner piece 12 and bolts, ensuring the stability of the fixing seat 1.

[0030] To avoid occlusion, for example, such as Figure 1 As shown, the upper surfaces of the placement platform 11 and the cover plate 22 are on the same horizontal plane, the upper surface of the clamping member 15 is higher than the upper surface of the placement platform 11, and the end of the screw 13 is threaded to the lower side of the outer wall of the placement platform 11.

[0031] When in use, the sample can be placed on the upper end of the placement stage 11. The clamping member 15 protrudes from the placement stage 11 and can clamp and fix the outer side of the sample. After the clamping member 15 clamps and fixes the sample, the upper end of the sample is higher than the upper end of the clamping member 15. When the cover plate 22 moves vertically with the threaded sleeve 2, it can prevent the cover plate 22 from blocking the sample and ensure the protrusion of the sample.

[0032] To maintain the usage location, for example, such as Figure 3 As shown, a first support spring 14 is sleeved on the outside of the screw 13. The two ends of the first support spring 14 are in contact with the outer wall of the placement platform 11 and the clamping member 15, respectively, and the clamping member 15 is elastically connected to the placement platform 11 through the first support spring 14.

[0033] During use, the first support spring 14 can compress the clamping member 15 to ensure that the position of the clamping member 15 is relatively stable. When the drive block 26 moves downward and pushes the clamping member 15 to move radially, it can compress and store energy on the first support spring 14. After the drive block 26 is reset, the first support spring 14 can release its elastic force to push the clamping member 15 to reset and release the clamping of the sample. The gap between the lower end face of the clamping member 15 and the lower end of the inner wall of the fixed seat 1 is 0.1 mm, and the radial movement of the clamping member 15 is ensured to be horizontal by the screw 13 and the fixed seat 1.

[0034] To maintain the movement trajectory, for example, such as Figure 4 As shown, a slider 27 is welded to the outer inclined surface of the drive block 26. The slider 27 adopts a convex shape design and is slidably installed inside the groove 16.

[0035] In use, the cooperation between the inclined surface and the convex slider 27 converts the vertical movement of the drive block 26 into the radial movement of the clamping member 15, thereby forming an efficient transmission for the rotation adjustment of the threaded sleeve 2 to drive the clamping member 15. Furthermore, the slide groove 16 and the slider 27 restrict the relative movement direction of the drive block 26 and the clamping member 15, preventing the cover plate 22 from rotating along with the threaded sleeve 2, thus ensuring the stability of the vertical movement of the cover plate 22.

[0036] To maintain the usage location, for example, such as Figure 4 As shown, a second support spring 25 is provided inside the guide groove 23. Spring mounting grooves are provided on one side of the outer wall of the guide block 29 and one side of the inner wall of the guide groove 23. The second support spring 25 is located inside the spring mounting groove. The guide block 29 is elastically connected to the inner wall of the guide groove 23 through the second support spring 25.

[0037] In use, the second support spring 25 provides elastic preload to the drive block 26, and the elastic force of the second support spring 25 is greater than that of the first support spring 14. Thus, when the cover plate 22 carries the drive block 26 and moves vertically downward, the elastic force of the second support spring 25 keeps the guide block 29 relatively stable and drives the clamping member 15 to move radially according to the slider 27 and the slide groove 16. Since the second support spring 25 can absorb the impact force of the clamping member 15, it can reduce the rigid collision between the drive block 26 and the guide groove 23 and avoid crushing the outside of the sample.

[0038] To ensure relative movement, for example, such as Figure 4 As shown, a connector 28 is welded to one side of the upper end of the outer wall of the drive block 26, and the connector 28 is connected to the guide block 29 by screws.

[0039] During use, the screw connection facilitates the disassembly and replacement of the drive block 26 and the guide block 29, and the connection 28 and the guide block 29 ensure that the drive block 26 is in a stable relative position on the lower end face of the cover plate 22.

[0040] When using this utility model, the operator fixes the fixing seat 1 to the stage of the wear testing machine by using external bolts through the through hole of the fixing corner piece 12, places the sample to be tested on the upper end of the placement stage 11, and adjusts the position of the sample so that it is vertically aligned with the center point of the placement stage 11. The staff manually rotates the threaded sleeve 2. Since the threaded sleeve 2 is threadedly connected to the outer wall of the fixed seat 1, the rotation is converted into a vertical downward movement of the threaded sleeve 2. The threaded sleeve 2 drives the cover plate 22 to move vertically downward in sync through the support bearing 21. The drive block 26 at the lower end of the cover plate 22 moves downward accordingly. The inclined surface on the outer side of the drive block 26 contacts the clamping member 15. At the same time, the convex slider 27 slides in the groove 16 of the clamping member 15, converting the vertical downward movement into the radial movement of the clamping member 15. During the movement of the clamping member 15, the first support spring 14 is squeezed until multiple clamping members 15 simultaneously contact the outer wall of the sample and apply clamping force to complete the sample fixation. At this time, the elastic force of the second support spring 25 ensures that the drive block 26 and the clamping member 15 are in close contact to prevent loosening. After the experiment, the threaded sleeve 2 is rotated in the opposite direction, causing the cover plate 22 and the drive block 26 to move vertically upward and reset. The pushing force of the drive block 26 on the clamping member 15 disappears, the first support spring 14 releases its elastic force, and pushes the clamping member 15 to move in the opposite direction.

[0041] It should be noted that this utility model is a clamping mechanism for sample wear testing. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for a sample wear test, characterized in that, The device includes a fixed base (1), a threaded sleeve (2), and a drive block (26). A placement platform (11) is welded to one side of the lower end of the fixed base (1). A threaded sleeve (2) is threaded to the upper end of the outer side of the fixed base (1). A support bearing (21) is interference-fitted to one side of the upper end of the inner wall of the threaded sleeve (2). A cover plate (22) is interference-fitted to the inner ring of the support bearing (21). A drive block (26) is arranged in a circular array at the lower end of the cover plate (22). A guide groove (23) is arranged in a circular array on the lower end face of the cover plate (22). A plug (24) is threaded to one side of the inner wall of the guide groove (23). A guide block (29) is slidably installed inside the guide groove (23). A screw (13) is arranged in a circular array at the lower end of the outer wall of the fixed base (1). A clamping member (15) is sleeved on the outer side of the screw (13). A sliding groove (16) is opened on one side of the outer wall of the clamping member (15).

2. The clamping mechanism for the sample wear test according to claim 1, characterized in that, The lower end of the outer wall of the fixing base (1) is welded with a circular array of fixing corner pieces (12), and the fixing corner pieces (12) have through holes inside.

3. The clamping mechanism for the sample wear test according to claim 1, characterized in that, The upper surfaces of the placement platform (11) and the cover plate (22) are on the same horizontal plane. The upper surface of the clamping member (15) is higher than the upper surface of the placement platform (11). The end of the screw (13) is threaded to the lower side of the outer wall of the placement platform (11).

4. The clamping mechanism for the sample wear test according to claim 1, characterized in that, The screw (13) is fitted with a first support spring (14) on its outer side. The two ends of the first support spring (14) are in contact with the outer wall of the placement platform (11) and the clamping member (15), respectively, and the clamping member (15) is elastically connected to the placement platform (11) through the first support spring (14).

5. The clamping mechanism for the sample wear test according to claim 1, characterized in that, The drive block (26) has a slider (27) welded to its outer inclined surface. The slider (27) is designed with a convex shape and is slidably installed inside the groove (16).

6. The clamping mechanism for the sample wear test according to claim 1, characterized in that, The guide groove (23) is provided with a second support spring (25). The outer wall of the guide block (29) and the inner wall of the guide groove (23) are both provided with spring mounting grooves. The second support spring (25) is located inside the spring mounting groove. The guide block (29) is elastically connected to the inner wall of the guide groove (23) through the second support spring (25).

7. The clamping mechanism for the sample wear test according to claim 1, characterized in that, A connector (28) is welded to one side of the upper end of the outer wall of the drive block (26), and the connector (28) is connected to the guide block (29) by screws.

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