An automatic clamping device for friction and wear tests

Abstract

The present invention relates to the technical field of friction and wear testing machines, and discloses an automatic clamping device for friction and wear tests, which includes an outer housing. A rotating body is rotatably arranged inside the outer housing, and the rotating body is used to fix the drill bit. An articulated member is also arranged on the outer housing, and the outer housing is movably articulated on a base through the articulated member. The articulated member is used to adjust the angle of the outer housing. For this automatic clamping device for friction and wear tests, in order to prevent the friction welding head from causing the articulated member to rotate automatically during the detection process, resulting in an increase in the gap between the outer housing and the friction block, a resistance mechanism is further arranged inside the articulated member. The resistance mechanism is used to improve the stability of the articulated member. The resistance mechanism includes a ratchet wheel rotatably arranged on a hinge shaft. A resisting block is slidably arranged inside the articulated member, and the resisting block is used to abut against the ratchet wheel. The ratchet wheel can be abutted by the resisting block, thereby hindering the ratchet wheel from rotating, so that the hinge shaft inside the articulated member cannot rotate, and thus the outer housing cannot rotate automatically.

Description

Technical Field

[0001] The present invention relates to the technical field of friction and wear testing machines, and particularly to an automatic clamping device for friction and wear tests. Background Technique

[0002] Friction stir welding refers to the process of locally melting the materials to be welded by the heat generated by the friction between a high-speed rotating welding tool and the workpiece. When the welding tool moves forward along the welding interface, the plasticized material flows from the front of the welding tool to the back under the rotational frictional force of the welding tool, and a dense solid-phase weld is formed under the extrusion of the welding tool.

[0003] All kinds of frictional relative motions will cause wear. There are many factors affecting wear, such as the material of the friction parts, the surface shape, the form of frictional motion, the working conditions, and the lubrication method, etc. Therefore, before the friction welded joints leave the factory, friction and wear experiments need to be carried out to ensure their qualified quality.

[0004] However, traditional friction and wear testing machines mostly conduct tests on the horizontal plane. Due to the special shape of the friction welded joints, and the main stress points of the friction welded joints are at the welding part between the boss and the connecting sleeve and the threaded grooves or threaded protrusions provided on the boss, while traditional testing machines cannot conduct directional tests on these nodes, resulting in certain differences in the test results and being unable to fully ensure whether the product quality of the welded joints meets the standards. Summary of the Invention

[0005] The present invention provides an automatic clamping device for friction and wear tests, which has the beneficial effect of adjusting the direction of the welded joint and conducting directional tests, and solves the problem mentioned in the above background technique that traditional testing machines cannot conduct directional tests on these nodes, resulting in certain differences in the test results and being unable to fully ensure whether the product quality of the welded joints meets the standards.

[0006] The present invention provides the following technical solution: an automatic clamping device for friction and wear tests, including an outer shell body, a rotating body is rotatably arranged inside the outer shell body, the rotating body is used to fix the drill bit, and a hinge is also arranged on the outer shell body. The outer shell body is movably hinged on the base through the hinge, and the hinge is used to adjust the angle of the outer shell body;

[0007] A resistance mechanism is also arranged inside the hinge, the resistance mechanism is used to improve the stability of the hinge, and the resistance mechanism includes a ratchet wheel rotatably arranged on the hinge shaft, and a resisting block is slidably arranged inside the hinge, and the resisting block is used to abut against the ratchet wheel.

[0008] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: An installation base is further provided on the base, a regulating telescopic rod is provided on the installation base, the abutting block is connected to the regulating telescopic rod, and the abutting block is installed on the installation base through the regulating telescopic rod.

[0009] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: A connecting block is further provided on the rotating body, the connecting block is used to assist in fixing the drill bit, and a limiting device is provided inside the connecting block, the limiting device is used to limit the drill bit;

[0010] The limiting device includes a sliding groove opened in the connecting block, a slider is slidably arranged in the sliding groove, and the slider is used to abut against the drill bit.

[0011] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: A hollow partition is provided inside the connecting block, an electric telescopic rod is installed on the hollow partition, and the hollow partition is connected to the slider through the electric telescopic rod.

[0012] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: An adsorption mechanism is further provided on the slider, the adsorption mechanism is used to improve the connection stability between the slider and the drill bit;

[0013] The adsorption mechanism includes a groove opened in the slider, and a suction cup is arranged in the groove, and the suction cup is used to adsorb the inner wall of the drill bit.

[0014] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: An air suction mechanism is further provided inside the suction cup, the air suction mechanism is used to pump air out of the suction cup;

[0015] The air suction mechanism includes an air extraction through hole opened in the slider, and the air extraction through hole penetrates through the suction cup, a connecting bellows corresponding to the air extraction through hole is provided on the hollow partition, and the connecting bellows is communicated with the hollow partition.

[0016] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: An air pipe is further provided inside the rotating body, and the air pipe is communicated with the hollow partition, an air extraction pipe is further provided on the outer shell body, and the air extraction pipe is used to extract air.

[0017] As an alternative solution for the automatic clamping device used in the friction and wear test of the present invention, the following is provided: A support mechanism is further provided on the outer shell body, and the outer shell body is further connected to the base through the support mechanism;

[0018] The support mechanism comprises an upper mounting seat slidably arranged on the outer shell, a lower mounting seat corresponding to the upper mounting seat is arranged on the base, a connecting shaft is arranged on the lower mounting seat, and the lower mounting seat is connected to the upper mounting seat through the connecting shaft;

[0019] One end of the connecting shaft is movably hinged on the lower mounting seat, and the other end of the connecting shaft is movably hinged on the upper mounting seat.

[0020] As an optional solution for the automatic clamping equipment for friction and wear testing described in the present invention, the base is also provided with a resisting telescopic rod, and a ring is also provided on the resisting telescopic rod. The resisting telescopic rod is connected to the connecting shaft rod through the ring, and a certain gap is left between the ring and the connecting shaft rod.

[0021] As an optional solution of the automatic clamping device for friction and wear test of the present invention, wherein: the base is also provided with an adjustment mechanism, the abutment telescopic rod is installed on the adjustment mechanism, and the abutment telescopic rod is slidably connected with the base through the adjustment mechanism;

[0022] The adjustment mechanism comprises a bottom block slidably arranged on the base, the abutting telescopic rod is installed on the bottom block, a sliding block is arranged at the bottom of the bottom block, a threaded rod is rotatably arranged on the base, and the sliding block is threadedly connected to the threaded rod;

[0023] A resisting slider is also slidably arranged on the base, the resisting slider is threadedly connected to the threaded rod, and the resisting slider is used to resist the lower mounting seat.

[0024] The present invention has the following beneficial effects:

[0025] 1. For the automatic clamping equipment for friction and wear test, when the angle of the outer shell changes, a friction welding joint is installed at one end of the outer shell, and the friction welding joint has a certain weight. Therefore, in order to prevent the friction welding joint from causing the hinge to self-rotate during the detection process, causing the gap between the outer shell and the friction block to become larger, a resistance mechanism is also provided in the hinge. The resistance mechanism is used to improve the stability of the hinge. The resistance mechanism includes a ratchet rotatably arranged on the hinge shaft, and a stop block is slidably arranged in the hinge. The stop block is used to abut the ratchet, and the ratchet can be abutted by the stop block, thereby preventing the ratchet from rotating, so that the hinge shaft in the hinge cannot rotate and the outer shell cannot self-rotate, so as to ensure the accuracy of the experimental results.

[0026] 2. The automatic clamping equipment for friction and wear test, when the suction cup is adsorbed on the inner wall of the drill bit, the air enclosed by the suction cup when it is adsorbed can be extracted from its internal space by vacuuming, thereby changing the internal and external air pressure difference of the suction cup, and making the suction cup and the inner wall of the drill bit adsorbed more tightly, thereby preventing the connection between the drill bit and the connecting block from loosening due to the weight of the drill bit in a tilted state. In order to improve the sealing, a connecting pipe is also provided in the air extraction hole, and the connecting pipe can be used to connect the internal space of the suction cup and the connecting bellows, so as to prevent gas from leaking or infiltrating through the air extraction hole, thereby reducing the adsorption effect of the suction cup. Since the slider will slide in the connecting block, a connecting bellows is used as a connector for gas transportation to adapt to the change in the spacing between the slider and the hollow partition.

[0027] 3. In order to reduce the force applied by the outer shell to the ratchet when the outer shell is tilted, the automatic clamping equipment for friction and wear test is further provided with a collar on the abutting telescopic rod, and the abutting telescopic rod is connected to the connecting shaft through the collar, and a certain gap is left between the collar and the connecting shaft, so that after the outer shell is tilted, the connecting shaft is tilted and abuts on the collar, and the collar will bear a certain gravity from the outer shell, thereby sharing the gravity at the ratchet. At the same time, the abutting telescopic rod and the outer shell are abutted, so that a part of the gravity of the outer shell will also be shared by the abutting telescopic rod. Through the cooperation between the abutting telescopic rod, the connecting shaft and the collar, a mobile tripod that can change according to the angle change amplitude of the outer shell is formed, which not only improves the supporting effect of the outer shell, but also shares the pressure applied by the outer shell to the abutting telescopic rod, thereby improving the stability of the outer shell in the tilted state, and then reduces the interference of the outer shell on the rotation stability of the rotating body in the tilted state through external support, so that the rotating body drives the drill bit to rotate more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall external structure of the junction of the present invention.

[0029] Figure 2 It is a schematic diagram of the separation of the external overall structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the overall internal structure of the present invention.

[0031] Figure 4 It is a schematic diagram of the local structure of the present invention.

[0032] Figure 5 for Figure 3 Schematic diagram of the local structure at point A.

[0033] Figure 6 for Figure 4 Schematic diagram of the local structure at point B.

[0034] Figure 7 bit Figure 3 Partial structural schematic diagram at position C in the middle.

[0035] In the figure: 1, outer housing; 2, rotating body; 3, connecting block; 31, hollow partition; 32, air pipe; 33, air extraction pipe; 41, chute; 42, slider; 43, electric telescopic rod; 51, groove; 52, suction cup; 61, air extraction through hole; 62, connecting corrugated pipe; 71, ratchet; 72, abutting block; 73, regulating telescopic rod; 81, upper mounting seat; 82, lower mounting seat; 83, connecting shaft rod; 9, abutting telescopic rod; 101, bottom block; 102, sliding block; 103, abutting slider; 11, threaded rod; 12, fixing pin. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1-7 , an automatic clamping device for friction and wear tests, including an outer housing 1, a rotating body 2 is rotatably arranged inside the outer housing 1, the rotating body 2 is used to fix the drill bit, and a hinge is also arranged on the outer housing 1. The outer housing 1 is movably hinged on the base through the hinge, and the hinge is used to adjust the angle of the outer housing 1;

[0039] A resistance mechanism is also arranged inside the hinge. The resistance mechanism is used to improve the stability of the hinge. The resistance mechanism includes a ratchet 71 rotatably arranged on the hinge shaft, and an abutting block 72 is slidably arranged inside the hinge. The abutting block 72 is used to abut against the ratchet 71.

[0040] A mounting seat is also arranged on the base, a regulating telescopic rod 73 is arranged on the mounting seat, the abutting block 72 is connected to the regulating telescopic rod 73, and the abutting block 72 is installed on the mounting seat through the regulating telescopic rod 73.

[0041] In this embodiment: When the friction welding head is performing friction welding, the welding joint between the drill bit and the connecting sleeve and the thread protrusions / thread grooves on the drill bit are the points where the drill bit is subjected to the greatest force during operation. However, traditional friction detection experimental fixtures do not have the ability to change the detection angle of the drill bit. Therefore, a hinge is also provided on the outer housing 1. The outer housing 1 is movably hinged to the base through the hinge, and the hinge is used to adjust the angle of the outer housing 1. By changing the angle of the outer housing 1 on the base, the welding joint between the drill bit and the connecting sleeve on the friction welding head and the thread protrusions / thread grooves on the drill bit can be brought closer to the friction block, so as to perform friction detection on these stress points to ensure the accuracy of the detection results.

[0042] When the angle of the outer housing 1 changes, since a friction welding head is installed at one end of the outer housing 1 and the friction welding head has a certain weight, in order to prevent the friction welding head from causing the hinge to rotate automatically during the detection process, resulting in an increase in the gap between the outer housing 1 and the friction block, a resistance mechanism is also provided inside the hinge. The resistance mechanism is used to improve the stability of the hinge. The resistance mechanism includes a ratchet wheel 71 rotatably arranged on the hinge shaft, and a resisting block 72 is slidably arranged inside the hinge. The resisting block 72 is used to abut against the ratchet wheel 71.

[0043] The ratchet wheel 71 can be abutted by the resisting block 72, thereby hindering the rotation of the ratchet wheel 71, so that the hinge shaft inside the hinge cannot rotate, and thus the outer housing 1 cannot rotate automatically to ensure the accuracy of the experimental results. In addition, a mounting seat is also provided on the base, and a regulating telescopic rod 73 is arranged on the mounting seat. The resisting block 72 is connected to the regulating telescopic rod 73, and the resisting block 72 is mounted on the mounting seat through the regulating telescopic rod 73. The regulating telescopic rod 73 is used to drive the resisting block 72 to slide instead of manual operation, thereby ensuring the accuracy of the sliding distance of the resisting block 72.

[0044] Embodiment 2

[0045] Please refer to Figures 1-5 , a connecting block 3 is further provided on the rotating body 2. The connecting block 3 is used to assist in fixing the drill bit, and a limiting device is arranged inside the connecting block 3. The limiting device is used to limit the drill bit;

[0046] The limiting device includes a sliding groove 41 opened inside the connecting block 3, and a sliding block 42 is slidably arranged in the sliding groove 41. The sliding block 42 is used to abut against the drill bit.

[0047] A hollow partition 31 is arranged inside the connecting block 3, and an electric telescopic rod 43 is installed on the hollow partition 31. The hollow partition 31 is connected to the sliding block 42 through the electric telescopic rod 43.

[0048] In this embodiment: Since the drill bit needs to rotate for friction detection, in order to prevent the drill bit from slightly separating from the rotating body 2 under the action of centrifugal force during rotation, causing the drill bit to shake on the rotating body 2 and interfering with the experimental results, a connecting block 3 is provided on the rotating body 2, and a limiting device is provided inside the connecting block 3. The limiting device improves the connection tightness between the connecting block 3 and the inner wall of the drill bit to prevent the drill bit from shaking.

[0049] The limiting device includes a chute 41 opened in the connecting block 3. A slider 42 is slidably arranged in the chute 41. The slider 42 is used to abut against the drill bit. A hollow partition 31 is arranged in the connecting block 3. An electric telescopic rod 43 is installed on the hollow partition 31, and the hollow partition 31 is connected to the slider 42 through the electric telescopic rod 43.

[0050] The electric telescopic rod 43 can make the slider 42 slide in the connecting block 3 towards the direction close to the inner wall of the drill bit until the slider 42 abuts against the inner wall of the drill bit, thereby preventing the drill bit from shaking during rotation.

[0051] Embodiment 3

[0052] Please refer to Figures 3-5 , an adsorption mechanism is further provided on the slider 42. The adsorption mechanism is used to improve the connection stability between the slider 42 and the drill bit;

[0053] The adsorption mechanism includes a groove 51 opened in the slider 42. A suction cup 52 is arranged in the groove 51. The suction cup 52 is used to adsorb the inner wall of the drill bit.

[0054] An air suction mechanism is further arranged in the suction cup 52. The air suction mechanism is used to pump air out of the suction cup 52;

[0055] The air suction mechanism includes an air extraction through hole 61 opened in the slider 42, and the air extraction through hole 61 penetrates through the suction cup 52. A connecting corrugated pipe 62 corresponding to the air extraction through hole 61 is arranged on the hollow partition 31, and the connecting corrugated pipe 62 is communicated with the hollow partition 31.

[0056] An air pipe 32 is further arranged in the rotating body 2, and the air pipe 32 is communicated with the hollow partition 31. An air extraction pipe 33 is arranged on the outer shell 1, and the air extraction pipe 33 is used for air extraction.

[0057] In this embodiment: In order to prevent the drill bit from sliding off the connecting block 3 under the action of gravity after the angle of the outer shell 1 changes, thereby interfering with the experimental detection, an adsorption mechanism is further provided on the slider 42. The adsorption mechanism can further strengthen the fixing tightness of the drill bit on the connecting block 3;

[0058] The adsorption mechanism includes a groove 51 opened in the slider 42. A suction cup 52 is arranged in the groove 51. The suction cup 52 is used to adsorb the inner wall of the drill bit.

[0059] When the slider 42 abuts against the inner wall of the drill bit, the suction cup 52 will adsorb to the inner wall of the drill bit, thereby generating a suction force between the slider 42 and the drill bit, increasing the frictional resistance between the slider 42 and the drill bit, so as to prevent the drill bit from sliding off the connecting block 3 after the outer housing 1 tilts.

[0060] At the same time, an air suction mechanism is also provided in the suction cup 52. The air suction mechanism is used to evacuate the suction cup 52. The air suction mechanism includes an air extraction through hole 61 opened in the slider 42, and the air extraction through hole 61 penetrates the suction cup 52. A connecting bellows 62 corresponding to the air extraction through hole 61 is provided on the hollow partition 31, and the connecting bellows 62 communicates with the hollow partition 31.

[0061] When the suction cup 52 adsorbs to the inner wall of the drill bit, the air enclosed when the suction cup 52 adsorbs can be extracted from its internal space through air extraction, thereby changing the internal and external air pressure difference of the suction cup 52, and further making the suction cup 52 adsorb more tightly to the inner wall of the drill bit, so as to prevent the connection between the weight of the drill bit and the connecting block 3 from loosening in the tilted state. In order to improve the sealing performance, a connecting pipeline is also provided in the air extraction through hole 61. The internal space of the suction cup 52 and the connecting bellows 62 can be connected through the connecting pipeline, thereby preventing gas from leaking or infiltrating through the air extraction through hole 61, resulting in a reduction in the adsorption effect of the suction cup 52.

[0062] Since the slider 42 slides within the connecting block 3, the connecting bellows 62 is used as a connecting member for gas transmission to adapt to the change in the distance between the slider 42 and the hollow partition 31.

[0063] To facilitate the storage of the connecting block 3, the connecting block 3 and the rotating body 2 are threadedly connected. While reducing the occupied space of the connecting block 3, it can also prevent the parts inside the connecting block 3 from being damaged during storage, and improve the service life of the connecting block 3.

[0064] To enable air extraction, an air extraction pipeline 33 is provided on the outer housing 1, and an electromagnetic valve is provided on the rotating body 2. When the air extraction pipeline 33 is inserted into the air outlet of the electromagnetic valve, by starting the solenoid valve, the air extraction pipeline 33 is communicated with the air extraction passage in the connecting block 3, and then air extraction can be performed through the total control device. After the air extraction is completed, the electromagnetic valve can be closed to seal the air extraction passage in the rotating body 2, and the air extraction pipeline 33 can be removed, so as to start the equipment for detection experiments. The air extraction pipeline 33 can be removed from the outer housing 1, which ensures that the air extraction pipeline 33 does not rotate with the rotating body 2. While ensuring the overall sealing and stability of the outer shell of the outer housing 1, it can also extend the service life of the air extraction pipeline 33, preventing it from being entangled due to rotation and then breaking.

[0065] A trachea 32 is also provided in the air extraction passage. Since the connecting block 3 and the rotating body 2 are threadedly connected, in order to provide the trachea 32, the sealing performance between the connecting block 3 and the rotating body 2 can be improved, and the air extraction efficiency can be enhanced.

[0066] Embodiment 4

[0067] Please refer to Figures 2-6 , a support mechanism is also provided on the outer housing 1, and the outer housing 1 is also connected to the base through the support mechanism;

[0068] The support mechanism includes an upper mounting seat 81 slidably disposed on the outer housing 1. A lower mounting seat 82 corresponding to the upper mounting seat 81 is provided on the base. A connecting shaft rod 83 is provided on the lower mounting seat 82, and the lower mounting seat 82 is connected to the upper mounting seat 81 through the connecting shaft rod 83;

[0069] One end of the connecting shaft rod 83 is movably hinged to the lower mounting seat 82, and the other end of the connecting shaft rod 83 is movably hinged to the upper mounting seat 81.

[0070] A resisting telescopic rod 9 is also provided on the base. A collar is also provided on the resisting telescopic rod 9. The resisting telescopic rod 9 is connected to the connecting shaft rod 83 through the collar, and a certain gap is left between the collar and the connecting shaft rod 83.

[0071] An adjusting mechanism is also provided on the base. The resisting telescopic rod 9 is mounted on the adjusting mechanism, and the resisting telescopic rod 9 is slidably connected to the base through the adjusting mechanism;

[0072] The adjusting mechanism includes a bottom block 101 slidably disposed on the base. The resisting telescopic rod 9 is mounted on the bottom block 101. A sliding block 102 is provided at the bottom of the bottom block 101. A threaded rod 11 is also rotatably provided on the base. The sliding block 102 is threadedly connected to the threaded rod 11;

[0073] A resisting sliding block 103 is also slidably provided on the base. The resisting sliding block 103 is threadedly connected to the threaded rod 11, and the resisting sliding block 103 is used to resist the lower mounting seat 82.

[0074] In this embodiment: In order to improve the stable operation of the device during the inclined rotation, a support mechanism is also provided on the outer housing 1, and the outer housing 1 is also connected to the base through the support mechanism;

[0075] The supporting mechanism includes an upper mounting seat 81 slidably disposed on the outer shell 1, a lower mounting seat 82 corresponding to the upper mounting seat 81 is disposed on the base, a connecting shaft 83 is disposed on the lower mounting seat 82, and the lower mounting seat 82 is connected to the upper mounting seat 81 via the connecting shaft 83. In order to support the outer shell 1 when the outer shell 1 changes its angle to improve the stability of the outer shell 1, a contact telescopic rod 9 is further disposed on the base, and the top end of the contact telescopic rod 9 contacts the bottom of the outer shell 1.

[0076] In order to reduce the force applied by the outer shell 1 to the ratchet 71 when the outer shell 1 is tilted, a collar is further provided on the abutting telescopic rod 9, and the abutting telescopic rod 9 is connected to the connecting shaft 83 through the collar, and a certain gap is left between the collar and the connecting shaft 83, so that after the outer shell 1 is tilted, the connecting shaft 83 is tilted and abuts on the collar, and the collar will bear a certain gravity from the outer shell 1, thereby sharing the gravity at the ratchet 71;

[0077] At the same time, due to the friction between the telescopic rod 9 and the outer shell 1, a part of the gravity of the outer shell 1 will also be shared by the telescopic rod 9. Through the cooperation between the telescopic rod 9, the connecting shaft rod 83 and the collar, a mobile tripod that can change according to the angle change amplitude of the outer shell 1 is formed. While improving the supporting effect of the outer shell 1, the pressure applied by the outer shell 1 to the telescopic rod 9 is shared, thereby improving the stability of the outer shell 1 in the tilted state. Furthermore, through external support, the interference of the outer shell 1 on the rotation stability of the rotating body 2 in the tilted state is reduced, so that when the rotating body 2 drives the drill bit to rotate, it will be more stable.

[0078] In order to limit the lower mounting seat 82 so that it can play a supporting role for the outer shell 1, a threaded rod 11 is rotatably arranged on the base, and a resistance slider 103 is slidably arranged on the base, and the resistance slider 103 is threadedly connected to the threaded rod 11. By rotating the threaded rod 11, the resistance slider 103 can be driven to resist the lower mounting seat 82, thereby limiting the position and enabling the lower mounting seat 82 to play a supporting role. In addition, a fixing pin 12 is also arranged on the base, and the fixing pin 12 can pass through the threaded rod 11, thereby limiting the rotation of the threaded rod 11, so as to achieve the purpose of enabling the resistance slider 103 to support the lower mounting seat 82.

[0079] A bottom block 101 is also slidably arranged on the base. The bottom block 101 is slidably arranged on the base through a sliding block 102 , and is installed on the bottom block 101 to abut against the telescopic rod 9 . The sliding block 102 is also threadedly connected to the threaded rod 11 .

[0080] The position of the threaded rod 11 is limited by the fixing pin 12, so as to limit the positions of the abutting slider 103 and the sliding block 102, enabling them to play a supporting role. Instead of sliding along with the outer housing 1, the abutting slider 103 and the sliding block 102 cannot provide an effective limiting force, thus preventing the abutting telescopic rod 9 and the connecting shaft rod 83 from sharing the pressure.

[0081] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0082] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic clamping device for friction and wear tests, comprising a housing (1), wherein a rotating body (2) is rotatably arranged in the housing (1), and the rotating body (2) is used for fixing a drill bit, and is characterized in that: The outer shell (1) is also provided with a hinge member, and the outer shell (1) is movably hinged to the base through the hinge member, and the hinge member is used to adjust the angle of the outer shell (1); A resistance mechanism is further arranged in the hinge member. The resistance mechanism is used to improve the stability of the hinge member. The resistance mechanism includes a ratchet wheel (71) rotatably arranged on a hinge shaft. A resisting block (72) is slidably arranged in the hinge member. The resisting block (72) is used to abut against the ratchet wheel (71). An installation seat is further arranged on the base. A regulating telescopic rod (73) is arranged on the installation seat. The resisting block (72) and the regulating telescopic rod (73) are connected to each other, and the resisting block (72) is installed on the installation seat through the regulating telescopic rod (73); A connecting block (3) is further arranged on the rotating body (2). The connecting block (3) is used to assist in fixing the drill bit, and a limiting device is arranged in the connecting block (3). The limiting device is used to limit the drill bit; The limiting device includes a sliding groove (41) formed in the connecting block (3). A sliding block (42) is slidably arranged in the sliding groove (41). The sliding block (42) is used to abut against the drill bit. A hollow partition plate (31) is arranged in the connecting block (3). An electric telescopic rod (43) is installed on the hollow partition plate (31). The hollow partition plate (31) is connected to the sliding block (42) through the electric telescopic rod (43). An adsorption mechanism is further arranged on the sliding block (42). The adsorption mechanism is used to improve the connection stability between the sliding block (42) and the drill bit; The adsorption mechanism includes a groove (51) formed in the sliding block (42). A suction cup (52) is arranged in the groove (51). The suction cup (52) is used to adsorb the inner wall of the drill bit.

2. The automatic clamping device for friction and wear tests according to claim 1, characterized in that: An air suction mechanism is further arranged in the suction cup (52). The air suction mechanism is used to pump air out of the suction cup (52); The air suction mechanism includes an air extraction through hole (61) formed in the sliding block (42), and the air extraction through hole (61) penetrates through the suction cup (52). A connecting corrugated pipe (62) corresponding to the air extraction through hole (61) is arranged on the hollow partition plate (31), and the connecting corrugated pipe (62) is communicated with the hollow partition plate (31); 3. The automatic clamping device for friction and wear test according to claim 2, wherein: An air pipe (32) is further arranged in the rotating body (2), and the air pipe (32) is communicated with the hollow partition plate (31). An air extraction pipe (33) is further arranged on the outer shell (1). The air extraction pipe (33) is used to extract air.

4. The automatic clamping device for friction and wear tests according to claim 1, characterized in that: A support mechanism is further arranged on the outer shell (1). The outer shell (1) is further connected to the base through the support mechanism; The support mechanism includes an upper installation seat (81) slidably arranged on the outer shell (1). A lower installation seat (82) corresponding to the upper installation seat (81) is arranged on the base. A connecting shaft rod (83) is arranged on the lower installation seat (82). The lower installation seat (82) is connected to the upper installation seat (81) through the connecting shaft rod (83); One end of the connecting shaft rod (83) is movably hinged to the lower mounting base (82), and the other end of the connecting shaft rod (83) is movably hinged to the upper mounting base (81).

5. The automatic clamping device for friction and wear tests according to claim 4, characterized in that: A contact telescopic rod (9) is further arranged on the base, a collar is further arranged on the contact telescopic rod (9), the contact telescopic rod (9) is connected to the connecting shaft rod (83) through the collar, and a certain gap is left between the collar and the connecting shaft rod (83).

6. The automatic clamping device for friction and wear test according to claim 5, characterized in that: An adjusting mechanism is further arranged on the base, the contact telescopic rod (9) is installed on the adjusting mechanism, and the contact telescopic rod (9) is slidably connected to the base through the adjusting mechanism; The adjusting mechanism comprises a bottom block (101) slidably arranged on the base, the contact telescopic rod (9) is installed on the bottom block (101), a sliding block (102) is arranged at the bottom of the bottom block (101), a threaded rod (11) is rotatably arranged on the base, and the sliding block (102) is in threaded connection with the threaded rod (11); A contact slider (103) is further slidably arranged on the base, the contact slider (103) is in threaded connection with the threaded rod (11), and the contact slider (103) is used for contacting the lower mounting base (82).

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