A disc fixture for a reciprocating friction and wear testing machine

Abstract

A disc clamp for a reciprocating friction and wear testing machine comprises a three-jaw chuck mechanism, a rotating mechanism and a translation mechanism arranged in sequence from top to bottom; the three-jaw chuck mechanism has three jaws, a second turbine and a second worm, and the second turbine and the second worm drive the three jaws to clamp or loosen; the rotating mechanism comprises a first turbine and a first worm, and the first turbine and the first worm drive the three-jaw chuck mechanism to achieve precise angle rotation; the translation mechanism comprises a screw and a nut connector, and the screw and the nut connector drive the rotating mechanism to move position. The present invention solves the problem that the sample of a reciprocating friction and wear testing machine whose upper and lower modules are not movable cannot be rotated or moved, and can clamp samples of multiple sizes. The clamp is not only convenient for loading and unloading samples, but also equipped with a scale, so that the sample can be accurately rotated to the specified position, so that one sample can carry out multiple groups of experiments. The combination of rotation and movement can realize the testing of large samples at different positions, thereby improving the experimental efficiency.

Description

Technical Field

[0001] The invention relates to the field of friction and wear testing, in particular to a disc clamp used for a reciprocating friction and wear testing machine. Background Art

[0002] Reciprocating friction and wear testing machine is a commonly used equipment to explore the tribological behavior of materials. Generally, reciprocating friction and wear testing machine is divided into two modules, namely the loading module and the reciprocating module, and the sample fixture of at least one module can be moved to change the experimental position of the sample. However, there are still some reciprocating friction and wear testing machines in which the loading and reciprocating modules are integrated, and the upper and lower sample fixtures cannot change positions, resulting in a sample that can only be tested once, greatly reducing the sample utilization rate; in addition, the fixture of the traditional reciprocating friction and wear testing machine either fastens the perforated sample to the fixture with screws, and for the sample that cannot be effectively punched, the result of the clamping experiment will appear; or the sample is pressed by fasteners; the two types of fixtures can clamp samples of a single size, and the sample disassembly is complicated, reducing the experimental efficiency.

[0003] Taking the TRM-2000 friction and wear tester as an example, the linear oscillation module (reciprocating friction) currently provides load and reciprocates on the upper sample, and the lower sample is fixed to the tester by fasteners. The size of the fasteners is fixed and cannot clamp samples of other sizes, and the position is fixed. Since the upper and lower sample fixtures have no movement or rotation function, a sample can only be replaced after one experiment, and the operation steps are cumbersome, wasting materials and time.

[0004] Chinese patent document CN 112014206 A discloses a universal fixture for a reciprocating friction and wear testing machine, in which the sample is placed on a crossbeam, the left and right symmetrical slide blocks of the sample are clamped by a screw rod, and the sample is clamped between the slide block and the crossbeam by a set screw, thereby achieving a secure clamping of flat workpieces of various sizes. This fixing method determines that the sample cannot be simply and accurately rotated and adjusted, and cannot be changed in position, and only serves to fix the sample. Summary of the invention

[0005] In order to solve the problems of complex sample clamping, non-rotatable or non-movable, and single sample size, the present invention provides a reciprocating friction and wear testing machine fixture that can clamp samples of various sizes, is easy to load and unload, can rotate at any precise angle, and can be moved.

[0006] The technical solution adopted by the present invention is: a disc clamp for a reciprocating friction and wear testing machine, comprising a three-jaw chuck mechanism, a rotary mechanism and a translation mechanism arranged in sequence from top to bottom;

[0007] The translation mechanism comprises a slide rail base, a slide rail is respectively provided on the front and rear sides of the slide rail base, and a first scale is provided on the slide rail along its length direction; a screw rod parallel to the two slide rails is provided between the two slide rails, the left end of the screw rod is rotatably installed on the left side of the slide rail base, and the right end of the screw rod is rotatably installed on the right side of the slide rail base and connected to a hand wheel; a nut connector is sleeved on the screw rod, and the nut connector is connected to the base; slide rail sliders are respectively provided on the front and rear sides of the bottom surface of the base, and the slide rail sliders are slidably matched with the slide rails; a rotary mechanism is provided on the top surface of the base, and the translation mechanism can drive the rotary mechanism to perform reciprocating translation motion;

[0008] The rotary mechanism comprises a first radial thrust bearing, a main shaft, a first worm, a first turbine and a rotating hand wheel, a worm support seat is respectively provided on the left and right sides of the base, a protective baffle is respectively connected between the front and rear sides of the two worm support seats, the top surfaces of the two worm support seats and the two protective baffles are commonly connected to a middle cover plate, and a first mounting cavity is formed between the worm support seat, the protective baffle and the middle cover plate; a first worm is provided in the first mounting cavity, and the left and right ends of the first worm can rotatably penetrate the worm support seats on the left and right sides respectively and are respectively connected to a rotating hand wheel; the first worm is meshed with the first turbine, and the first turbine is installed on the main shaft, and the lower end of the main shaft is arranged on the base through the first radial thrust bearing; a three-jaw chuck mechanism is provided on the middle cover plate, and the rotary mechanism can drive the three-jaw chuck mechanism to perform rotational motion; the three-jaw chuck mechanism comprises a circular plate, an outer shell, A clamping jaw, a slide groove disc, a second worm and a second turbine; the circular plate is arranged on the middle cover plate, and the outer circumferential surface of the circular plate is provided with a second scale along the circumferential direction; a shell is provided on the upper cover of the circular plate, and the shell includes a shell top surface parallel to the circular plate and a shell annular surface connected to the bottom edge of the shell top surface, and a second mounting cavity is formed between the circular plate and the shell; the upper end of the main shaft passes through the middle cover plate and the circular plate upward and enters the second mounting cavity, wherein the circular plate is fixedly connected to the main shaft, and the main shaft is connected to the circular plate through a second radial thrust bearing; the second worm is arranged in the second mounting cavity, and the left and right ends of the second worm are rotatably passed through the shell annular surface and are each connected to a clamping handwheel; the second worm is meshed with the second turbine, and the second turbine is mounted on the main shaft through a sliding bearing; the top surface of the second turbine is connected to the slide groove disc through a turbine welding plate, and the upper end of the main shaft is connected to the bottom surface of the slide groove disc through a rolling bearing;

[0009] The slide disc is provided with three curved grooves around its center, and the top surface of the shell is provided with three narrow and long grooves for installing the clamping jaws; the bottom of the clamping jaw is fixedly connected to the clamping jaw limiting block, the clamping jaw limiting block slides with the curved groove, and the clamping jaw slides with the narrow and long groove; when the slide disc rotates, the clamping jaw limiting block slides along the curved groove and drives the clamping jaw to approach or move away from the center of the slide disc along the narrow and long groove to realize the clamping or loosening action.

[0010] Furthermore, flange bearings are provided between the two ends of the first worm and the turbine support seat.

[0011] Furthermore, the three narrow grooves are distributed at 120°.

[0012] The beneficial effects of the present invention are:

[0013] (1) The present invention solves the problem that the specimen of a reciprocating friction and wear testing machine whose upper and lower modules are both immovable cannot be rotated or moved.

[0014] (2) The fixture is not only convenient for loading and unloading samples, but also equipped with a scale, so the sample can be accurately rotated to the required position, so that multiple sets of experiments can be carried out on one sample. The combination of rotation and movement can realize the test of different positions of larger samples. It is easy to operate, fully utilizes the experimental materials, and improves the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0017] Figure 3 It is a perspective view of the present invention.

[0018] Explanation of the reference numerals in the accompanying drawings: 1. Clamp; 2. Housing; 3. Slide groove disc; 4. Clamp limit block; 5. Turbine welding plate; 6. Second turbine; 7. Second worm; 8. Clamping handwheel; 9. Second radial thrust bearing; 10. Round plate; 11. Middle cover plate; 12. Worm support seat; 13. Protective baffle; 14. Main shaft; 15. First turbine; 16. First worm; 17. Flange bearing; 18. Rotating handwheel; 19. First radial thrust bearing; 20. Base; 21. Nut connector; 22. Slide rail slider; 23. Handwheel; 24. Screw; 25. Slide rail; 26. Pad; 27. Slide rail base. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Referring to the accompanying drawings, the technical solution adopted by the present invention is: a disc fixture for a reciprocating friction and wear testing machine, comprising a three-jaw chuck mechanism, a rotary mechanism and a translation mechanism arranged in sequence from top to bottom;

[0023] The translation mechanism includes a slide rail base 27, and a slide rail 25 is provided on each of the front and rear sides of the slide rail base 27, and a first scale is provided on the slide rail 25 along its length direction; a screw rod 24 parallel to the two slide rails is provided between the two slide rails, and the left end of the screw rod 24 is rotatably installed on the left side of the slide rail base 27, and the right end of the screw rod 24 is rotatably passed through the right side of the slide rail base 27 and connected to a hand wheel 23, and flange bearings 17 are provided between the two ends of the first worm 16 and the worm support seat 12; a nut connector 21 is sleeved on the screw rod 24, and the nut connector 21 is connected to the base 20; slide rail sliders 22 are respectively provided on the front and rear sides of the bottom surface of the base 20, and the slide rail sliders 22 are slidably matched with the slide rail 25; a rotary mechanism is provided on the top surface of the base 20, and the translation mechanism can drive the rotary mechanism to perform reciprocating translation motion;

[0024] The rotary mechanism includes a first radial thrust bearing 19, a main shaft 14, a first worm 16, a first turbine 15 and a rotating hand wheel 18. A worm support seat 12 is provided on the left and right sides of the base 20, and a protective baffle 13 is connected between the front and rear sides of the two worm support seats 12. The top surfaces of the two worm support seats 12 and the two protective baffles 13 are commonly connected to a middle cover plate 11, and a first installation cavity is formed between the worm support seats 12, the protective baffles 13 and the middle cover plate 11; the first installation cavity A first worm 16 is arranged in the cavity, and the left and right ends of the first worm 16 are rotatably connected to the worm support seats 12 on the left and right sides and are respectively connected to a rotating hand wheel 18; the first worm 16 is meshed with the first turbine 15, and the first turbine 15 is installed on the main shaft 14, and the lower end of the main shaft 14 is arranged on the base 20 through the first radial thrust bearing 19; a three-jaw chuck mechanism is arranged on the middle cover plate 11, and the rotary mechanism can drive the three-jaw chuck mechanism to rotate; the three-jaw chuck mechanism includes a circular plate 10, The outer shell 2, the clamping jaw 1, the slide disc 3, the second worm 7 and the second turbine 6; the circular plate 10 is arranged on the middle cover plate 11, and the outer circumferential surface of the circular plate 10 is provided with a second scale along the circumferential direction; the outer shell 2 is covered on the circular plate 10, and the outer shell 2 includes an outer shell top surface parallel to the circular plate 10 and an outer shell annular surface connected to the bottom edge of the outer shell top surface, and a second installation cavity is formed between the circular plate 10 and the outer shell 2; the upper end of the main shaft 14 passes upward through the middle cover plate 11 and the circular plate 10 into the second installation cavity, wherein the circular plate 10 and the main The shaft 14 is fixedly connected, and the main shaft 14 is connected to the circular plate 10 through the second radial thrust bearing 9; the second worm 7 is arranged in the second installation cavity, and the left and right ends of the second worm 7 are rotatably penetrated through the outer shell ring surface and are respectively connected to a clamping hand wheel 8; the second worm 7 is meshed with the second turbine 6, and the second turbine 6 is installed on the main shaft 14 through a sliding bearing; the top surface of the second turbine 6 is connected to the slide groove disc 3 through the turbine welding plate 5, and the upper end of the main shaft 14 is connected to the bottom surface of the slide groove disc 3 through a rolling bearing;

[0025] The slide groove disc 3 is provided with three curved grooves around its center, and the top surface of the shell 2 is provided with three narrow and long grooves for installing the clamping jaws 1, and the three narrow and long grooves are distributed at 120°; the bottom of the clamping jaw 1 is fixedly connected to the clamping jaw limit block 4, the clamping jaw limit block 4 slides in cooperation with the curved groove, and the clamping jaw 1 slides in cooperation with the narrow and long groove; when the slide groove disc 3 rotates, the clamping jaw limit block 4 slides along the curved groove and drives the clamping jaw 1 to approach or move away from the center of the slide groove disc 3 along the narrow and long groove to realize the clamping or loosening action.

[0026] The implementation process of the present invention is as follows: before the experiment, the slide block 22 and the slide rail 25 are aligned to the zero scale by turning the hand wheel 23 to achieve the alignment of the upper and lower sample centers. The disc sample is placed in the middle of the three jaws 1, and the sample is clamped by turning the clamping hand wheel 8. The sample position is adjusted by the screw rod 24 for testing. After a set of tests is completed, the untested part is transferred to the bottom of the upper sample by turning the rotating hand wheel 18. It can be rotated to a precise angle for testing. Furthermore, the sample position is changed by the screw rod 24, that is, the position of the center of the disc sample relative to the upper sample is changed, so that the disc sample can be used at different radii. This design is simple to operate and easy to load and unload samples. For samples of various sizes, it can be rotated and moved, which greatly improves the sample utilization rate and experimental efficiency. Samples of various sizes can be clamped without the need for re-modification and processing, saving costs.

[0027] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A disc fixture for a reciprocating friction and wear testing machine, characterized in that: It includes a three-jaw chuck mechanism, a rotary mechanism and a translation mechanism which are arranged in sequence from top to bottom; The translation mechanism comprises a slide rail base (27), wherein a slide rail (25) is respectively arranged on the front and rear sides of the slide rail base (27), and a first scale is arranged on the slide rail (25) along its length direction; a screw rod (24) parallel to the two slide rails is arranged between the two slide rails, the left end of the screw rod (24) is rotatably mounted on the left side of the slide rail base (27), and the right end of the screw rod (24) is rotatably passed through the right side of the slide rail base (27) and connected to a hand wheel (23); a nut connecting piece (21) is sleeved on the screw rod (24), and the nut connecting piece (21) is connected to the base (20); slide rail sliders (22) are respectively arranged on the front and rear sides of the bottom surface of the base (20), and the slide rail sliders (22) are slidably matched with the slide rail (25); a rotating mechanism is arranged on the top surface of the base (20), and the translation mechanism can drive the rotating mechanism to perform reciprocating translation motion; The rotary mechanism comprises a first radial thrust bearing (19), a main shaft (14), a first worm (16), a first turbine (15) and a rotating hand wheel (18); a worm support seat (12) is provided on the left and right sides of the base (20), a protective baffle (13) is connected between the front and rear sides of the two worm support seats (12), the top surfaces of the two worm support seats (12) and the two protective baffles (13) are connected to a middle cover plate (11), and a first installation cavity is formed between the worm support seats (12), the protective baffles (13) and the middle cover plate (11); the first installation cavity A first worm (16) is provided in the cavity, and the left and right ends of the first worm (16) are rotatably connected to the worm support seats (12) on the left and right sides and are respectively connected to a rotating hand wheel (18); the first worm (16) is meshed with the first turbine (15), the first turbine (15) is mounted on the main shaft (14), and the lower end of the main shaft (14) is arranged on the base (20) through a first radial thrust bearing (19); a three-jaw chuck mechanism is provided on the middle cover plate (11), and the rotary mechanism can drive the three-jaw chuck mechanism to perform a rotating motion; the three-jaw chuck mechanism comprises a circular plate (10), a housing (2), A clamping jaw (1), a slide groove disc (3), a second worm (7) and a second turbine (6); the circular plate (10) is arranged on a middle cover plate (11), and the outer peripheral surface of the circular plate (10) is provided with a second scale along the circumferential direction; a shell (2) is provided on the upper cover of the circular plate (10), and the shell (2) includes a shell top surface parallel to the circular plate (10) and a shell annular surface connected to the bottom edge of the shell top surface, and a second installation cavity is formed between the circular plate (10) and the shell (2); the upper end of the main shaft (14) passes upward through the middle cover plate (11) and the circular plate (10) and enters the second installation cavity, wherein the circular plate (10) and the main shaft (14) is fixedly connected, the main shaft (14) is connected to the circular plate (10) through a second radial thrust bearing (9); the second worm (7) is arranged in the second installation cavity, and the left and right ends of the second worm (7) respectively rotatably penetrate the outer shell ring surface and are each connected to a clamping hand wheel (8); the second worm (7) is meshed with the second turbine (6), and the second turbine (6) is installed on the main shaft (14) through a sliding bearing; the top surface of the second turbine (6) is connected to the slide groove disc (3) through a turbine welding plate (5), and the upper end of the main shaft (14) is connected to the bottom surface of the slide groove disc (3) through a rolling bearing; The slide groove disc (3) is provided with three curved grooves around its center, and the top surface of the housing (2) is provided with three narrow and long grooves for mounting the clamping jaw (1); the bottom of the clamping jaw (1) is fixedly connected to the clamping jaw limit block (4), the clamping jaw limit block (4) is slidably matched with the curved groove, and the clamping jaw (1) is slidably matched with the narrow and long groove; when the slide groove disc (3) rotates, the clamping jaw limit block (4) slides along the curved groove and drives the clamping jaw (1) along the narrow and long groove to approach or move away from the center of the slide groove disc (3), so as to realize the clamping or loosening action.

2. A disc holder for a reciprocating friction and wear testing machine as claimed in claim 1, characterized in that: Flange bearings (17) are provided between the two ends of the first worm (16) and the worm support seat (12).

3. A disc holder for a reciprocating friction and wear testing machine as claimed in claim 1, characterized in that: The three narrow grooves are distributed at 120°.

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