Seat lifting mechanism working condition simulation device

Abstract

The invention discloses a seat lifting mechanism working condition simulation device, belongs to the field of mechanical part testing, solves the problem of inaccurate testing in the prior art, and adopts the technical scheme that the seat lifting mechanism working condition simulation device comprises a machine body, a driving mechanism arranged on the machine body, a driving plate, a sheet metal part, an opposite grinding part, a mounting shaft, a test part and a loading unit, the test piece and the abrasion piece are arranged on the mounting shaft and are in contact with each other, the sheet metal part is rotationally connected to the mounting shaft through the driving plate, the sheet metal part and the driving plate rotate synchronously and are fixedly connected with the test piece, and the driving mechanism drives the driving plate to do circumferential reciprocating motion. The sheet metal part is arranged on the driving plate, so that the sheet metal part drives the test piece to do circumferential reciprocating motion relative to the abrasion piece, friction is generated between the test piece and the abrasion piece, and the loading unit is arranged on the driving plate and applies a load to the test piece through the sheet metal part. The device mainly achieves the simulation of seat lifting, and improves the test accuracy.

Description

Technical Field

[0001] The invention relates to the field of mechanical component testing, in particular to a working condition simulation device for a seat lifting mechanism. Background Art

[0002] For ease of use, by changing the linkage structure inside the seat, the seat in the prior art can be raised and lowered to meet the various needs of users. For example, in a car seat, the lifting adjustment of the car seat can help the driver reduce blind spots to maintain the best field of vision, give the driver enough leg room to control acceleration and deceleration, and ensure the comfort of hand operation. The bushing driven by the sheet metal plays a key role in the seat lifting mechanism.

[0003] In the prior art, the performance test of the bushing is mainly to place the bushing on the mounting shaft and drive the mounting shaft to rotate for testing. However, the bushing is subjected to the load from the seat for a long time in the seat, and the wear of the bushing is often more serious than during the test. Summary of the invention

[0004] The purpose to be achieved by the present invention is to provide a seat lifting mechanism working condition simulation device, which solves the problem of inaccurate testing in the prior art, realizes simulated seat lifting, and improves test accuracy.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a seat lifting mechanism working condition simulation device, including a fuselage, a driving mechanism arranged on the fuselage, a driving plate, a sheet metal part, a wearing part, a mounting shaft, a test piece and a loading unit, the test piece and the wearing part are mounted on the mounting shaft and contact each other, the sheet metal part is rotatably connected to the mounting shaft through the driving plate, the sheet metal part rotates synchronously with the driving plate and is fixedly connected to the test piece, the driving mechanism drives the driving plate to reciprocate in a circle, so that the sheet metal part drives the test piece to reciprocate in a circle relative to the wearing part, so that friction occurs between the test piece and the wearing part, and the loading unit is arranged on the driving plate and applies a load to the test piece through the sheet metal part.

[0006] After adopting the above technical scheme, the present invention has the following advantages: by applying load to the test piece (bushing) through the loading unit, the load from the seat that the test piece actually bears in the seat can be simulated, which solves the problem that the wear condition of the test piece during the prior art test is quite different from that in actual use, and the test results are closer to the performance of the test piece under real working conditions. In addition, in the actual working conditions of the seat lifting mechanism, the direction of the load force applied to the test piece is relatively fixed. Since the sheet metal is rotating, the drive plate rotates synchronously with the sheet metal, and the loading unit is arranged on the drive plate. This enables the direction of the force applied by the loading unit to remain relatively stable during the rotation of the sheet metal, and can more accurately simulate the directional characteristics of the load force borne by the test piece in actual use, thereby avoiding test errors caused by changes in the direction of the force.

[0007] Furthermore, at least two surfaces of the test piece are in contact with the counter-wearing part.

[0008] By adopting the above-mentioned technical solution, in an actual seat lifting mechanism, the test piece will produce multi-directional contact and friction with surrounding components when working, and at least two surfaces of the test piece are in contact with the wearing part, which can more realistically simulate the wear conditions of each contact surface of the test piece under actual working conditions.

[0009] Furthermore, the grinding piece includes a first pair of grinding blocks, a second pair of grinding blocks and a grinding shaft section located on the mounting shaft, the inner diameter surface of the test piece is sleeved on the grinding shaft section, the first pair of grinding blocks and the second pair of grinding blocks are installed on both sides of the test piece on the mounting shaft, and the first pair of grinding blocks and the second pair of grinding blocks are respectively in contact with two axial end faces of the test piece.

[0010] By adopting the above-mentioned technical scheme, the first pair of grinding blocks and the second pair of grinding blocks are in contact with the two axial end faces of the test piece respectively, which can more accurately simulate the actual force conditions of the test piece in the axial direction, such as the axial pressure or tension generated by gravity transmission, dynamic impact, etc. during the up and down movement of the seat. The axial force changes that the test piece may encounter in different usage scenarios (such as rapid lifting and lowering of seats, passengers with different loads, etc.) can be included as much as possible, so that the test data can better reflect the performance of the test piece in actual working conditions, and provide a more comprehensive and accurate basis for the design optimization of the test piece. In addition, the first pair of grinding blocks and the second pair of grinding blocks can also realize the contact fixation of the test piece.

[0011] Furthermore, the loading unit applies a load to the test piece along a radial direction of the test piece.

[0012] By adopting the above-mentioned technical solution, in the automobile seat lifting mechanism, the load force borne by the test piece from the seat is mainly in the radial direction, and the loading unit applies the load in the radial direction of the test piece, which can more accurately simulate the force mode of the test piece in the actual working scenario.

[0013] Furthermore, the loading unit includes a fixed pulley, a load loader, a fixed block and a connecting rope. The load loader and the fixed pulley are fixed on the driving plate and are respectively located on both sides of the test piece. One end of the connecting rope is connected to the sheet metal part, and the other end of the connecting rope passes through the fixed pulley and is connected to the load loader.

[0014] By adopting the above-mentioned technical solution, a load loader is set in the device, so that the load can be directly applied to the test piece. The fixed pulley plays a key role in changing the direction of the force in the device. One end of the connecting rope is connected to the sheet metal part, and the other end passes through the fixed pulley and is connected to the load loader. This allows the loading unit to apply the load more stably along the radial direction of the test piece, and also makes the layout of the loading unit more compact, occupying less space.

[0015] Furthermore, the fixed pulley is fixed on the driving plate, the load loader and the driving plate are detachably connected, and a plurality of mounting positions for mounting the load loader are provided on the driving plate, and different mounting positions have different distances from the center of the test piece.

[0016] Through the above technical solution, a plurality of installation positions for installing load loaders are provided on the driving plate along the arrangement direction of the connecting ropes, so as to more precisely simulate the different load sizes that the test piece is subjected to under different actual working conditions (such as passengers with different loads), and different installation positions can also change the direction of the loading force, so as to more precisely simulate the complex radial force direction that the test piece is subjected to under different actual working conditions (such as when the seat is at different tilt angles).

[0017] Furthermore, the fuselage is also provided with a counting mechanism for collecting the number of circular reciprocating motions of the sheet metal part.

[0018] Through the above technical scheme, by recording the number of circular reciprocating motions and combining them with the wear condition and performance changes of the test piece (such as changes in the friction coefficient, reduction in stiffness, etc.), the service life of the test piece can be evaluated more accurately, and the operating status of the drive mechanism can be better controlled.

[0019] Furthermore, the fuselage is also provided with a torque collection mechanism for collecting the torque of the driving plate during the circular motion.

[0020] Through the above technical solution, the size and change of the torque will affect the contact pressure and friction between the test piece and the counter-wear piece. Through the torque data recorded by the torque acquisition mechanism, the force characteristics of the bushing under different torques can be intuitively understood.

[0021] Furthermore, a limiting member is provided on the driving plate, one end of the sheet metal member is fixedly connected to the test piece, and the other end of the sheet metal member is suspended in the air and in contact with the limiting member.

[0022] Through the above technical solution, the design of one end of the sheet metal being suspended provides the necessary space and freedom for the loading unit to apply the load. When the loading unit applies the load along the radial direction of the test piece, if the sheet metal is completely fixed to the drive plate, the loading force will not be effectively transmitted to the test piece because there is no suitable deformation space to achieve the force loading.

[0023] Furthermore, the driving mechanism includes a driving motor, a small gear and a large gear that mesh with each other, the small gear is fixedly connected to the output end of the driving motor, and the large gear is fixedly connected to the driving plate.

[0024] Through the above technical solution, in the seat lifting mechanism, the test piece may be subjected to greater resistance, especially the resistance under conditions of simulating a full load of passengers or aging of the seat lifting mechanism. The meshing of the small gear and the large gear can amplify the torque output by the drive motor, thereby more realistically simulating the various resistance conditions that the test piece may encounter under actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the working condition simulation device of the seat lifting mechanism in the present invention;

[0027] Figure 2 It is a cross-sectional view of the working condition simulation device of the seat lifting mechanism in the present invention;

[0028] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0029] Figure 4 It is a partial structural diagram of the working condition simulation device of the seat lifting mechanism in the present invention;

[0030] Figure 5 It is a partial structural diagram of the seat lifting mechanism working condition simulation device in another perspective of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the sheet metal part and the test piece in the present invention;

[0032] In the figure, 10, fuselage; 11, mounting shaft; 12, limit member; 13, first shaft section; 14, grinding shaft section; 15, second shaft section; 16, viewing window; 20, driving motor; 21, small gear; 22, large gear; 30, driving plate; 31, mounting hole; 40, sheet metal; 41, through hole; 51, first pair of grinding blocks; 52, second pair of grinding blocks; 60, fixed pulley; 61, load loader; 62, fixed block; 63, connecting rope; 70, counting sensor; 80, bearing; 90, test piece; 91, flange. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0035] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0036] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0037] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0038] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0039] like Figures 1 to 6As shown, the present invention provides a seat lifting mechanism working condition simulation device, including a fuselage 10, a driving mechanism arranged on the fuselage 10, a driving plate 30, a sheet metal part 40, a grinding part, a mounting shaft 11, a test piece 90 and a loading unit, the test piece 90 and the grinding part are mounted on the mounting shaft 11 and contact each other, the sheet metal part 40 is rotatably connected to the mounting shaft 11 through the driving plate 30, the sheet metal part 40 rotates synchronously with the driving plate 30 and is fixedly connected to the test piece 90, the driving mechanism drives the driving plate 30 to reciprocate in a circle, so that the sheet metal part 40 drives the test piece 90 to reciprocate in a circle relative to the grinding part, so that friction occurs between the test piece 90 and the grinding part, and the loading unit is arranged on the driving plate 30 and applies a load to the test piece 90 through the sheet metal part 40.

[0040] By applying a load to the test piece 90 (bushing) through the loading unit, the load condition of the test piece 90 from the seat can be simulated, which solves the problem that the wear condition of the test piece 90 in the prior art test is quite different from that in actual use, and makes the test result closer to the performance of the test piece 90 under real working conditions. In addition, in the actual working condition of the seat lifting mechanism, the direction of the load force on the test piece 90 is relatively fixed. Since the sheet metal 40 is rotating, the drive plate 30 rotates synchronously with the sheet metal 40, and the loading unit is arranged on the drive plate 30. This makes it possible for the direction of the force applied by the loading unit to remain relatively stable during the rotation of the sheet metal 40, and can more accurately simulate the directional characteristics of the load force borne by the test piece 90 in actual use, thereby avoiding test errors caused by changes in the direction of the force.

[0041] In order to further improve the test accuracy, the fuselage 10 is also provided with a control center and a counting mechanism for collecting the number of circular reciprocating motions of the sheet metal part 40. By recording the number of circular reciprocating motions and combining it with the wear and tear of the test piece 90 and performance changes (such as changes in the friction coefficient, reduction in stiffness, etc.), the service life of the test piece 90 can be more accurately evaluated. The counting mechanism is electrically connected to the control center, and the counting mechanism sends the number of circular reciprocating motions of the sheet metal part 40 to the control center, and the control center better controls the operation of the motor based on the collected data.

[0042] Specifically, the counting mechanism includes a counting sensor 70 , and the counting sensor 70 is fixed on the fuselage 10 through a U-shaped groove and a threaded connection.

[0043] Furthermore, the fuselage 10 is also provided with a torque collection mechanism for collecting the torque of the driving plate 30 during the circular motion. The magnitude and change of the torque will affect the contact pressure and friction between the test piece 90 and the counter-wearing part. Through the torque data recorded by the torque collection mechanism, the force characteristics of the bushing under different torques can be intuitively understood, and the friction coefficient between the test piece 90 and the counter-wearing part can also be calculated.

[0044] In an actual seat lifting mechanism, the test piece 90 will generate multi-directional contact and friction with surrounding components when working. For this reason, in the present application, at least two surfaces of the test piece 90 are in contact with the wear part, which can more realistically simulate the wear conditions of each contact surface of the test piece 90 under actual working conditions.

[0045] Specifically, in the present application, the sheet metal part 40 is provided with a through hole 41, the test piece 90 is installed in the through hole 41 of the sheet metal part 40, the grinding piece includes a first pair of grinding blocks 51, a second pair of grinding blocks 52 and a grinding shaft section 14 located on the mounting shaft 11, the inner diameter surface of the test piece 90 is sleeved on the grinding shaft section 14, the first pair of grinding blocks 51 and the second pair of grinding blocks 52 are installed on both sides of the test piece 90 on the mounting shaft 11, the first pair of grinding blocks 51 and the second pair of grinding blocks 52 are respectively in contact with the two axial end faces of the test piece 90, and can more accurately simulate the test piece The actual stress conditions of 90 in the axial direction, such as the axial pressure or tension generated by gravity transfer, dynamic impact, etc. during the up and down movement of the seat, can include as much as possible the axial force changes that the test piece 90 may encounter in different usage scenarios (such as rapid lifting and lowering of the seat, passengers with different loads, etc.). Compared with the single surface contact test in the prior art, the integrity of the simulation is greatly improved, so that the test data can better reflect the performance of the test piece 90 in actual working conditions, and provide a more comprehensive and accurate basis for the design optimization of the test piece 90.

[0046] In order to avoid displacement or shaking of the test piece 90 during the simulation test as much as possible, the installation shaft 11 also includes a first shaft section 13 and a second shaft section 15 located at both ends of the grinding shaft section 14. The diameter of the first shaft section 13 is larger than the diameter of the grinding shaft section 14 to form a first step surface at the intersection of the two, and the diameter of the grinding shaft section 14 is larger than the second shaft section 15 to form a second step surface at the intersection of the two. The first pair of grinding blocks 51 is installed between the first step surface and the test piece 90 to provide a more stable support for one end of the test piece 90. The second pair of grinding blocks 52 is installed on the second shaft section 15 and is spaced from the second step surface. The second pair of grinding blocks 52 presses the test piece 90 against the first pair of grinding blocks 51 to ensure that the test piece 90 is reliably fixed in the axial direction as much as possible, further ensuring the accuracy and stability of the test, and simplifying the installation method of the test piece 90.

[0047] Furthermore, the sheet metal part 40 is provided with a through hole for the test piece 90 to pass through, and both ends of the test piece 90 are fixed to the sheet metal part 40 by flanges 91. Compared with the conventional sleeve connection or clamping method, the flange 91 fixation increases the contact area as much as possible, greatly improves the firmness of the connection, and effectively prevents the test piece 90 from loosening, displacement or even falling off during high-speed and frequent circular reciprocating motion, providing a strong guarantee for the stability of the simulation test process.

[0048] In actual working conditions, the test piece 90 and the surrounding matching parts are not tightly fitted without gaps. Therefore, in this application, the sheet metal part 40 and the wear part are arranged at intervals. This can more accurately simulate the spatial relationship under such actual working conditions, so that the distribution and transmission of external forces such as friction and extrusion force on the test piece 90 are more in line with reality, further improving the accuracy of the simulation test.

[0049] In the prior art, the grinding parts are usually riveted, which is complicated to disassemble and install, and even requires destructive disassembly and assembly. For this reason, in the present application, the second pair of grinding blocks 52 is detachably mounted on the second shaft section 15, and a polygonal connector is provided at one end of the second pair of grinding blocks 52 away from the test piece 90. When the second pair of grinding blocks 52 is worn or damaged after long-term use, or when it is necessary to replace the second pair of grinding blocks 52 of different specifications according to different test requirements or test different test pieces 90, the operator can easily and quickly disassemble them without complicated tools or professional skills, which greatly simplifies the equipment maintenance process and significantly improves the maintainability of the device compared to the integrated or difficult-to-disassemble structure.

[0050] It should be noted that the second pair of grinding blocks 52 is provided with a threaded hole, and the second shaft segment 15 is provided with a thread. The second pair of grinding blocks 52 and the second shaft segment 15 can be threadedly connected, and the second pair of grinding blocks 52 can be disassembled and assembled by a torque wrench. The torque wrench can also reflect the real-time torque, thereby avoiding destructive disassembly and assembly of the sheet metal 40 and the grinding parts, and reusing them, saving energy and protecting the environment.

[0051] In the automobile seat lifting mechanism, the direction of the load force borne by the test piece 90 from the seat is mainly radial. For this reason, in the present application, the loading unit applies a load to the test piece 90 along the radial direction of the test piece 90, which can more accurately simulate the force mode of the test piece 90 in the actual working scenario.

[0052] When the loading unit applies a load along the radial direction of the test piece 90, if the sheet metal part 40 is completely fixed to the driving plate 30, the loading force cannot be effectively transmitted to the test piece 90 because there is no suitable deformation space to achieve the force loading. For this reason, a stopper 12 is provided on the driving plate 30, one end of the sheet metal part 40 is fixedly connected to the test piece 90, and the other end of the sheet metal part 40 is suspended and in contact with the stopper 12. The design of one end of the sheet metal part 40 being suspended provides the necessary space and freedom for the loading unit to apply the load.

[0053] Among them, the loading unit includes a fixed pulley 60, a load loader 61, a fixed block 62 and a connecting rope 63. The load loader 61 and the fixed pulley 60 are fixed on the driving plate 30 and are respectively located on both sides of the test piece 90. One end of the connecting rope 63 is connected to the sheet metal part 40, and the other end of the connecting rope 63 passes through the fixed pulley 60 and is connected to the load loader 61, so that the loading unit can apply load more stably along the radial direction of the test piece 90, and can also make the layout of the loading unit more compact and occupy less space. The load loader 61 can directly apply load to the test piece 90.

[0054] Furthermore, in this embodiment, the load loader 61 can not only realize the function of applying load, but also measure the load applied to the test piece 90. In order to make the detection data more intuitive, the load loader 61 can also be provided with a display screen that displays the size of the load loaded on the test piece 90.

[0055] It should be noted that in other embodiments, the load loader 61 may only be able to implement the function of applying load. The fewer functions it has, the simpler the structure.

[0056] The fixed pulley 60 is fixed on the driving plate 30, and the load loader 61 and the driving plate 30 are detachably connected. The driving plate 30 is provided with a plurality of mounting positions for mounting the load loader 61. Different mounting positions are arranged along a straight line and have different distances from the center of the test piece 90, thereby simulating more precisely the different load sizes that the test piece 90 is subjected to under different actual working conditions (such as passengers with different loads).

[0057] Specifically, a plurality of mounting holes 31 arranged vertically are provided on the driving plate 30 , and the load loader 61 is connected to the driving plate 30 via screws and a fixing block 62 that can move vertically.

[0058] Also, in the seat lifting mechanism, the test piece 90 may be subject to greater resistance, especially when simulating resistance under conditions such as full load of passengers or aging of the seat lifting mechanism, for which the driving mechanism includes a driving motor 20, a pinion 21 and a large gear 22 meshing with each other, the pinion 21 being fixedly connected to the output end of the driving motor 20, and the large gear 22 being fixedly connected to the driving plate 30. The meshing of the pinion 21 and the large gear 22 can amplify the torque output by the driving motor 20, thereby more realistically simulating various resistance conditions that the test piece 90 may encounter under actual working conditions.

[0059] It should be noted that the test piece 90 can be a structure such as a bushing or a sleeve. The mounting shaft 11 is fixedly connected to the fuselage 10, and the drive plate 30 is rotatably connected to the mounting shaft 11 through a bearing 80. The drive mechanism, the drive plate 30, the sheet metal part 40, the wear part, the mounting shaft 11, the test piece 90 and the loading unit are all located inside the fuselage 10. For easy observation, a visual window 16 is provided on the fuselage 10, and the visual window 16 can be opened or closed separately.

[0060] Furthermore, in the present application, the polygonal connector of the second pair of grinding blocks 52 is close to the visual window 16, and the visual window 16 can be directly opened to install or remove the second pair of grinding blocks 52. The operator does not need to disassemble too many internal parts of the fuselage 10, which greatly reduces the tediousness of manual operation.

[0061] It should be noted that the seats tested by the seat lifting mechanism working condition simulation device include not only car seats, but can also be applied to seats used on various operating tables or seats used in daily office work.

[0062] It can be understood that in other embodiments, different installation positions are located at different orientations of the test piece, which can change the direction of the loading force, thereby more accurately simulating the complex radial force direction to which the test piece is subjected under different actual working conditions (such as when the seat is at different tilt angles).

[0063] It is understandable that in other embodiments, a third pair of grinding pieces may be added, and the third pair of grinding pieces are located on the outer diameter surface of the test piece, so as to realize simulated detection of four surfaces of the test piece.

[0064] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A seat lifting mechanism working condition simulation device, characterized in that: The invention comprises a fuselage, a driving mechanism arranged on the fuselage, a driving plate, a sheet metal part, a counter-wearing part, a mounting shaft, a test piece and a loading unit, wherein the test piece and the counter-wearing part are mounted on the mounting shaft and contact each other, the sheet metal part is rotatably connected to the mounting shaft through the driving plate, the sheet metal part rotates synchronously with the driving plate and is fixedly connected to the test piece, the driving mechanism drives the driving plate to reciprocate in a circle, so that the sheet metal part drives the test piece to reciprocate in a circle relative to the counter-wearing part, so that friction occurs between the test piece and the counter-wearing part, and the loading unit is arranged on the driving plate and applies a load to the test piece through the sheet metal part.

2. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: At least two surfaces of the test piece are in contact with the counter-wearing piece.

3. The seat lifting mechanism working condition simulation device according to claim 2, characterized in that: The grinding piece includes a first pair of grinding blocks, a second pair of grinding blocks and a grinding shaft section located on the mounting shaft, the inner diameter surface of the test piece is sleeved on the grinding shaft section, the first pair of grinding blocks and the second pair of grinding blocks are installed on both sides of the test piece on the mounting shaft, and the first pair of grinding blocks and the second pair of grinding blocks are respectively in contact with two axial end faces of the test piece.

4. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: The loading unit applies a load to the test piece along a radial direction of the test piece.

5. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: The loading unit includes a fixed pulley, a load loader, a fixed block and a connecting rope. The load loader and the fixed pulley are fixed on a driving plate and are respectively located on both sides of the test piece. One end of the connecting rope is connected to the sheet metal part, and the other end of the connecting rope passes through the fixed pulley and is connected to the weighing piece.

6. The seat lifting mechanism working condition simulation device according to claim 5, characterized in that: The fixed pulley is fixed on the driving plate, the load loader and the driving plate are detachably connected, and the driving plate is provided with a plurality of mounting positions for mounting the load loader.

7. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: The machine body is also provided with a counting mechanism for collecting the number of circular reciprocating motions of the sheet metal part.

8. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: The fuselage is also provided with a torque collection mechanism for collecting the torque of the driving plate during the circular motion.

9. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: A limiting piece is arranged on the driving plate, one end of the sheet metal piece is fixedly connected to the test piece, and the other end of the sheet metal piece is suspended in the air and in contact with the limiting piece.

10. The seat lifting mechanism working condition simulation device according to claim 1, characterized in that: The driving mechanism comprises a driving motor, a small gear and a large gear meshing with each other, the small gear is fixedly connected to the output end of the driving motor, and the large gear is fixedly connected to the driving plate.

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