A reciprocating testing machine

Abstract

A reciprocating testing machine includes a frame, a slide assembly, a reciprocating mechanism, and a test fixture. Each of the test fixtures includes an abutment assembly and a four-sided clearance guide rail. The abutment assembly includes a fulcrum seat, a lever, and a loading ball shaft. The end of the lever is provided with an abutment ball. The four-sided clearance guide rail includes a guide seat, a clamping seat, and an adjustment plate. A spherical abutment portion is recessed on the end surface of the clamping seat that abuts the loading ball shaft. The reciprocating testing machine screws the four adjustment plates to the guide seat to form the four-sided clearance guide rail. The guide seat limits the freedom of the clamping seat in two directions and allows the clamping seat to slide in the four-sided clearance guide rail. Through the four-sided clearance guide rail, the spherical abutment portion provided on the clamping seat and the loading ball shaft cooperate with each other, so that the clamping seat can always maintain its position in a natural state to prevent uneven wear.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, in particular to a reciprocating testing machine. Background Art

[0002] In recent years, with the advancement of science and technology, the performance of materials has become a major obstacle to scientific and technological progress. The performance of new materials themselves or the performance testing of new material coatings is the key to the development of new products. Among the many performance test indicators of materials, friction and wear are very important indicators.

[0003] There are also some friction and wear testing machines on the market, including reciprocating and rotary types. However, in friction and wear experiments, most of the existing reciprocating equipment has the problem of eccentric wear. Once eccentric wear occurs, the experimental data will have a large deviation.

[0004] Chinese patent CN201920820013.1 discloses a reciprocating machine base for a reciprocating friction and wear tester. The reciprocating machine base includes a machine base, a reciprocating mechanism, and a slider mechanism. The machine base is provided with a cavity, the reciprocating mechanism is arranged in the cavity, and the upper portion of the machine base is provided with a groove that is connected to the cavity and has a slide rail arranged therein. The slider mechanism is arranged in the slide rail. The reciprocating stroke is accurately set by a purely mechanical mechanism to obtain precise test data. However, the connecting rod is only set horizontally, which cannot ensure the offset of the tested component, and the eccentric wear phenomenon remains unresolved. Summary of the Invention

[0005] In view of this, the present invention provides a reciprocating testing machine to solve the above technical problems.

[0006] A reciprocating test machine comprises a frame, a pair of slide assemblies arranged at intervals on the frame, a reciprocating mechanism arranged on one end of the slide assembly, and a pair of test clamps arranged on the other end of the slide assembly, each of the test clamps comprises a top assembly arranged on the end surface of the base plate facing away from the guide rail, and a four-sided gap guide rail fixedly arranged on the guide rail, the top assembly comprises a fulcrum seat, a lever with one end rotatably arranged on the fulcrum seat, and a lever inserted in the base plate and having one end connected to the fulcrum seat. The end of the lever near the fulcrum seat abuts against the loading ball head shaft, and the end of the lever near the loading ball head shaft is provided with an abutting ball head. The four-sided gap guide rail includes a guide seat provided on the base plate, a clamping seat engaged in the guide seat, and four adjustment plates screwed on the clamping seat. A spherical abutting portion is recessed on the end surface of the clamping seat abutting against the loading ball head shaft. The lever lifts the loading ball head shaft and makes it abut against the spherical abutting portion on the clamping seat, so that the clamping seat slides in the four-sided gap guide rail.

[0007] Furthermore, the slide assembly includes a base plate arranged on the frame, two pairs of guide rails arranged on the base plate, two pairs of slider support plates respectively slidably arranged on the two pairs of guide rails, and two test shaft seats arranged on the slider support plates.

[0008] Furthermore, the test shaft seat includes a base and a cover plate.

[0009] Furthermore, an axial fixing hole is provided on the end surface where the base and the cover plate abut against each other.

[0010] Furthermore, the reciprocating mechanism includes a pair of electric cylinder support plates arranged on the base plate, an electric cylinder mounting plate on one end face of the electric cylinder support plate facing the test fixture, an electric cylinder connected to the end face of the electric cylinder mounting plate away from the test fixture, and an electric cylinder connecting block arranged on the output end of the electric cylinder.

[0011] Furthermore, the electric cylinder connection block includes an electric cylinder slider arranged on the guide rail, a T-shaped connection block arranged on the electric cylinder slider, and a sensor arranged on the end face of the T-shaped connection block facing away from the electric cylinder.

[0012] Furthermore, an abutting ball head is provided at the end of the lever close to the loading ball head shaft, and a plurality of hooks are provided at intervals on the lever.

[0013] Furthermore, a self-lubricating bearing is provided between the loading ball head shaft and the base plate.

[0014] Furthermore, two end surfaces of the card holder in the length direction are provided with two card connection parts, and a card interface is opened in the middle area.

[0015] Furthermore, at least two elongated holes are spaced apart from each other on one end surface of the adjustment piece.

[0016] Compared to the prior art, the reciprocating testing machine provided by the present invention screws the four adjustment plates to the guide seat to form the four-sided clearance guide rail. The guide seat limits the two-directional freedom of the holder and allows the holder to slide within the four-sided clearance guide rail. The four-sided clearance guide rail, along with the spherical abutment provided on the holder and the loading ball shaft, allows the holder to always maintain its natural position, preventing uneven wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a reciprocating testing machine provided by the present invention.

[0018] Figure 2 for Figure 1A schematic structural diagram of a card holder of a reciprocating testing machine.

[0019] Figure 3 for Figure 1 A schematic structural diagram of a guide seat of a reciprocating testing machine.

[0020] Figure 4 for Figure 1 A schematic structural diagram of an adjustment plate of a reciprocating testing machine. DETAILED DESCRIPTION

[0021] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0022] like Figures 1 to 4 , which is a schematic structural diagram of a reciprocating testing machine provided by the present invention. The reciprocating testing machine comprises a frame 10, a pair of slide assemblies 20 spaced apart from each other on the frame 10, a reciprocating mechanism 30 disposed at one end of the slide assembly 20, and a pair of test fixtures 40 disposed at the other end of the slide assembly 20. It is contemplated that the reciprocating testing machine may also include other functional structures, such as connecting screws, pins, etc., which are well known to those skilled in the art and will not be further described here.

[0023] The rack 10 is a metal frame currently available on the market, which is used to install and carry equipment.

[0024] The slide assembly 20 includes a base plate 21 arranged on the frame 10, two pairs of guide rails 22 arranged on the base plate 21, two pairs of slider support plates 23 respectively slidably arranged on the two pairs of guide rails 22, and two test shaft seats 24 arranged on the slider support plates 23.

[0025] The size of the bottom plate 21 is the same as the end surface size of the frame 10 on which the bottom plate 21 is mounted, so that all four sides of the bottom plate 21 can abut against the frame 10 and can bear greater weight.

[0026] The two pairs of guide rails 22 are spaced apart and arranged on the bottom plate 21. The two pairs of slider support plates 23 are slidably arranged on the two pairs of guide rails 22. A test fixture 40 is fixedly arranged between each pair of slider support plates 23.

[0027] The test shaft seat 24 is fixedly mounted on the end surface of the slider support plate 23 facing away from the base plate 21. The test shaft seat 24 includes a base 241 connected to the slider support plate 23 and a cover plate 242 connected to the base 241. An axial fixing hole 243 is defined on the end surfaces where the base 241 and cover plate 242 abut. The base 241, cover plate 242, and axial fixing hole 243 are used to mount and secure the long shaft.

[0028] The reciprocating mechanism 30 is disposed between the two pairs of guide rails 22. The reciprocating mechanism 30 includes a pair of electric cylinder support plates 31 disposed on the base plate 21, an electric cylinder mounting plate 32 attached to one end of the electric cylinder support plates 31 facing the test fixture 40, an electric cylinder 33 connected to the surface of the electric cylinder mounting plate 32 facing away from the test fixture 40, and an electric cylinder connection block 34 disposed at the output end of the electric cylinder 33.

[0029] One end surface of the electric cylinder support plate 31 is secured to the base plate 21 via at least two fastening screws. The electric cylinder mounting plate 32 is screwed to the end surface of the electric cylinder support plate 31 facing the slide mechanism 20. The electric cylinder 33 is disposed between the two electric cylinder support plates 31 and screwed to the electric cylinder mounting plate 32.

[0030] The electric cylinder connection block 34 includes an electric cylinder slider 341 disposed on the guide rail 22 and connected at one end to the output end of the electric cylinder 33, a T-shaped connection block 342 disposed on the electric cylinder slider 341, and a sensor 343 disposed on the end surface of the T-shaped connection block 342 facing away from the electric cylinder 33. The other end of the sensor 343 is connected to the test shaft seat 24.

[0031] The electric cylinder 33 drives the electric cylinder connecting block 34 to move axially, and drives the test shaft seat 24 connected to the electric cylinder connecting block 34 to move along the guide rail 22 .

[0032] Each of the test fixtures 40 includes a push-up assembly 41 disposed on the end surface of the base plate 21 facing away from the guide rail 22 , and a four-sided clearance guide rail 42 fixedly disposed on the guide rail 22 .

[0033] The abutting assembly 41 includes a fulcrum seat 411 , a lever 412 with one end rotatably disposed on the fulcrum seat 411 , and a loading ball shaft 413 inserted into the base plate 21 and with one end abutting against the end of the lever 412 near the fulcrum seat 411 .

[0034] The fulcrum seat 411 is connected to the lever 412 via a rotating shaft. An abutting ball 414 is provided at the end of the lever 412 near the loading ball shaft 413. Multiple hooks 4121 are spaced apart on the lever 412 for attaching weights to adjust the force exerted by the abutting ball 414 on the lever 412 on the loading ball shaft 413, ensuring that the force exerted by the abutting ball 414 on the loading ball shaft 413 always remains in the same direction as the central axis of the ball shaft 413.

[0035] The loading ball shaft 413 is a long shaft with a ball at one end. A self-lubricating bearing is provided between the loading ball shaft 413 and the base plate 21 to prevent direct friction between the loading ball shaft 413 and the base plate 21. The central axis of the loading ball shaft 413 is always perpendicular to the base plate 21.

[0036] Each of the four-sided clearance guide rails 42 includes a guide seat 422 disposed on the base plate 21 , a clamping seat 421 clamped in the guide seat 422 , and four adjustment plates 423 screwed on the guide seat 422 .

[0037] See also Figure 3 The two end faces of the card holder 421 in the longitudinal direction are provided with two clamping parts 4211, and a clamping interface 4212 is provided in the middle area. The width dimension of the clamping part 4211 is half of the width dimension of the card holder 421. The height dimension of the clamping interface 4212 is less than or equal to half of the height dimension of the card holder 421. A spherical abutting part 4213 is recessed on the end face of the card holder 421 that abuts against the loading ball shaft 413. And in the natural state, the central axis of the spherical abutting part 4213 coincides with the central axis of the loading ball shaft 413.

[0038] See also Figure 2 The guide seat 422 has a T-shaped shape. The guide seat 422 is screwed to the base plate 21. A rectangular hole 4221 is defined on the side surface of the guide seat 422. The rectangular hole 4221 is configured to receive the engaging portion 4211. The height of the rectangular hole 4221 is greater than that of the engaging portion 4211, enabling the engaging portion 421 to move along the rectangular hole 4221.

[0039] See also Figure 4The adjusting piece 423 has an L-shaped shape and is made of high-strength brass to prevent it from rusting with other metal parts. At least two elongated holes 4231 are arranged at intervals on one end surface of the adjusting piece 423, which are fixed to one side of the rectangular hole 4221 by screws and are arranged in the rectangular hole 4221 together with the clamping portion 4211. And an adjusting piece 423 is connected to both sides of each rectangular hole 4221. The two guide seats 422 are respectively connected to the clamping portions 4211 on the two end surfaces of the clamping seat 421 to form a gap guide rail, and the size of the gap guide rail can be adjusted through the elongated holes 4231, so that the clamping seat 421 can be movably located between the gap guide rails.

[0040] A tool 43 is also threadedly provided in the holder 421, and a tool hole 431 is provided on the tool 43 which is coaxial with the axial fixing hole 243. The tool hole 431 is used to install the shaft sleeve to be tested, and the reciprocating mechanism 30 drives the long shaft to perform a reciprocating wear test on the shaft sleeve to be tested.

[0041] The test fixture 40 also includes two test assemblies 44 mounted on the base plate 21. Each test assembly 44 comprises a stylus mounting post 441 perpendicular to the base plate 21, a stylus clamping plate 442 mounted on the other end of the stylus mounting post 441, and a stylus 443 mounted on the end of the stylus clamping plate 442 distal from the stylus mounting post 441. The stylus clamping plate 442 is rotatable 360 degrees about the stylus mounting post 441. The stylus 443 contacts the end surface of the fixture 43 and can be manually reset to zero after contact, thereby recording the amount of wear.

[0042] During use, the two guide seats 422 restrict the degrees of freedom of the holder 421 in two directions, leaving it with only four degrees of freedom between the four adjustment plates 423. A weight is hung on the lever 412, causing the abutment ball 414 on the lever 412 to abut against the loading ball shaft 413, which in turn abuts against the spherical abutment portion 4213. When the holder 421 swings to one side during a reciprocating test, it abuts against one of the adjustment plates 423. At this point, the central axis of the spherical abutment portion 413 no longer coincides with the extended line of the central axis of the loading ball shaft 413. Next, because the direction of the force exerted by the loading ball shaft 413 on the spherical abutment 4213 is always along the extension of the central axis of the loading ball shaft 413, the holder 421 can be adjusted back to its natural position, i.e., the central axis of the spherical abutment 4213 coincides with the extension of the central axis of the loading ball shaft 413. Finally, the wear amount is recorded using the test assembly 44.

[0043] Compared to the prior art, the reciprocating testing machine provided by the present invention screws the four adjustment pieces 423 to the guide seat 422 to form the four-sided clearance guide rail 42. Furthermore, the guide seat 422 limits the degrees of freedom of the holder 421 in two directions, allowing the holder 421 to slide within the four-sided clearance guide rail 42. The four-sided clearance guide rail 42, the spherical abutment portion 4213 provided on the holder 421, and the loading ball shaft 413 cooperate with each other, allowing the holder 421 to always maintain its natural position, preventing uneven wear.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A reciprocating testing machine, characterized in that: The reciprocating test machine includes a frame, a pair of slide assemblies arranged on the frame at intervals, a reciprocating mechanism arranged on one end of the slide assembly, and a pair of test clamps arranged on the other end of the slide assembly. The slide assembly includes a base plate arranged on the frame and two pairs of guide rails arranged on the base plate. Each of the test clamps includes an abutment assembly arranged on the end surface of the base plate facing away from the guide rail, and a four-sided gap guide rail fixedly arranged on the guide rail. The abutment assembly includes a fulcrum seat, a fulcrum seat with one end rotatably arranged on the support The lever on the point seat, and a loading ball shaft inserted in the base plate and abutted against the end of the lever near the fulcrum seat at one end, an abutting ball head is provided at the end of the lever near the loading ball shaft, the four-sided clearance guide rail includes two guide seats provided on the base plate, a card seat clamped in the guide seat, and four adjustment plates screwed on the card seat, two end surfaces of the card seat in the length direction are provided with two clamping parts, and a card interface opened in the middle area, a rectangular hole is provided on the side end surface of the guide seat, and the rectangular hole is used to insert the clamping part The height dimension of the rectangular hole is greater than the height dimension of the clamping portion so that the card seat can move along the rectangular hole, and the two guide seats are respectively connected to the clamping portions on both end surfaces of the card seat to form a gap guide rail, and a spherical abutment portion is recessed on the end surface of the card seat that abuts the loading ball head shaft. At least two long holes are arranged at intervals on one end surface of the adjustment plate to be fixed with one side of the rectangular hole by screws, and the other end surface is arranged in the rectangular hole together with the clamping portion, and the lever lifts the loading ball head shaft and makes it abut against the spherical abutment portion on the card seat. The holder is made to slide in the four-sided clearance guide rails. The slide assembly also includes two pairs of slider supports respectively slidably arranged on the two pairs of guide rails, and two test shaft seats arranged on the slider supports. The test shaft seat includes a base and a cover plate. An axial fixing hole is provided on the end surface where the base and the cover plate abut. A tool is also screwed in the holder. The tool is provided with a tool hole coaxial with the axial fixing hole. The tool hole is used to install the shaft sleeve to be tested, and the long shaft is driven by the reciprocating mechanism to perform a reciprocating wear test on the shaft sleeve to be tested.

2. The reciprocating testing machine according to claim 1, characterized in that: The reciprocating mechanism includes a pair of electric cylinder support plates arranged on the base plate, an electric cylinder mounting plate on one end face of the electric cylinder support plate facing the test fixture, an electric cylinder connected to the end face of the electric cylinder mounting plate away from the test fixture, and an electric cylinder connecting block arranged on the output end of the electric cylinder.

3. The reciprocating testing machine according to claim 2, wherein: The electric cylinder connection block includes an electric cylinder slider arranged on the guide rail, a T-shaped connection block arranged on the electric cylinder slider, and a sensor arranged on the end surface of the T-shaped connection block facing away from the electric cylinder.

4. The reciprocating testing machine according to claim 1, wherein: A plurality of hooks are arranged on the lever at intervals.

5. The reciprocating testing machine according to claim 1, wherein: A self-lubricating bearing is provided between the loading ball head shaft and the base plate.

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