A track wheel testing machine

Abstract

The present invention provides a roller testing machine, comprising a control module, a rotating support device for placing a roller to be tested and driving the roller to be tested to rotate, a vertical load applying device located above the rotating support device, and a lateral load applying device located on one side of the vertical load applying device, wherein the vertical load applying device comprises two pressure arms respectively used to press the side cover of the roller to be tested, the lateral load applying device acts on the pressure arms, and the control module is respectively connected to the rotating support device, the vertical load applying device and the lateral load applying device. By causing the lateral load applying device to act on the pressure arm, the stress state of the roller when the roller is tilted can be simulated, and the simulation of various working conditions of the roller can be realized by cooperating with the vertical load applying device, and the test accuracy is relatively high.

Description

Technical Field

[0001] The invention relates to a testing device, in particular to a track wheel testing machine. Background Art

[0002] The track roller is an important component of the crawler traveling mechanism, which usually includes a wheel body that cooperates with the crawler track and side covers that are rotatably connected to the two ends of the wheel body. The side covers are used to connect to the frame of the crawler traveling mechanism. Therefore, the support wheel needs to bear the entire gravity of the vehicle with the crawler traveling mechanism, and the mechanical performance requirements are relatively high. Therefore, the track roller usually needs to be tested before leaving the factory to ensure that its mechanical performance can meet the use requirements.

[0003] Traditional track roller testing machines can usually only apply downward loads to the track rollers during testing. However, vehicles with tracked walking mechanisms usually travel on rugged mountain roads or uneven construction sites, resulting in the track rollers being subjected not only to downward loads during actual use, but also to lateral loads (i.e., the track roller axis) due to the tilt of the vehicle body. In addition, the track rollers are also subjected to lateral loads during the turning process of the vehicle. Applying only downward loads to the track rollers is not sufficient to simulate the actual working conditions of the track rollers, and the test accuracy is relatively low.

[0004] The Chinese utility model patent with authorization announcement number CN205981683U discloses a roller testing machine, which includes a frame, a motor, a base, and a simulation table. The base and the motor are arranged on the frame, and the simulation table is arranged on the base. Two rollers are arranged on the simulation table, and the two rollers are connected to the sprocket through a chain, and the sprocket is connected to the motor through a transmission mechanism; the shape of the rollers is matched with the rollers, and a supporting force simulation mechanism is vertically fixed on the upper part of the simulation table. The supporting force simulation mechanism is two vertical pressure simulation cylinders, and a pressure block is arranged at the bottom of the piston rod of the pressure simulation cylinder, and the roller contact simulates the pressure through the pressure block; two tilt simulation cylinders are vertically arranged on the frame, the bottom of the tilt simulation cylinder is fixed on the frame, and the top of the piston rod of the tilt simulation cylinder is connected to the simulation table through a hinge mechanism, and the simulation table is tilted left and right by the extension and retraction of the tilt simulation cylinder, and height detection devices are arranged on both sides of the tilt simulation cylinder. Although the track roller test machine can simulate various tilting states that may occur when the track rollers are in use, the force conditions of the track rollers when simulating the tilting states of the track rollers in use are different from the actual conditions. Specifically, in actual use, when the track rollers are arranged at an angle, their lateral directions (i.e., the axis of the track rollers) need to bear a certain weight of the vehicle body. However, in the track roller test machine, no load is applied to the lateral directions of the track rollers, and the test accuracy is still relatively low.

[0005] In view of this, the applicant conducted in-depth research on the track roller testing machine, which led to the present case. Summary of the invention

[0006] The object of the present invention is to provide a track roller testing machine with relatively high testing accuracy.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A roller testing machine comprises a control module, a rotating support device for placing a roller to be tested and driving the roller to be tested to rotate, a vertical load applying device located above the rotating support device, and a lateral load applying device located on one side of the vertical load applying device, wherein the vertical load applying device comprises two pressure arms respectively used to press the side covers of the roller to be tested, the lateral load applying device acts on the pressure arms, and the control module is communicatively connected with the rotating support device, the vertical load applying device and the lateral load applying device respectively.

[0009] As an improvement of the present invention, the rotating support device includes a support, a friction support wheel rotatably connected to the support, and a servo motor for driving the friction support wheel to rotate. There are two friction support wheels, the two friction support wheels are arranged parallel to each other and located on the same horizontal plane, and the distance between the two friction support wheels is smaller than the outer contour diameter of the wheel body of the supporting wheel to be measured.

[0010] As an improvement of the present invention, one end of each of the friction support wheels is fixedly connected to a driven gear coaxially arranged with the corresponding friction support wheel, and a transition gear is rotatably connected to the support and meshes with the two driven gears respectively, and a driving gear is meshed with the transition gear, and the driving gear is transmission-connected to the servo motor.

[0011] As an improvement of the present invention, the output shaft of the servo motor is connected to a reducer through a belt assembly, and the output shaft of the reducer and the driving gear are connected through a universal coupling.

[0012] As an improvement of the present invention, an oil collecting box is arranged below the two friction support wheels.

[0013] As an improvement of the present invention, the vertical load applying device also includes a vertically arranged guide rod, a slide seat slidably connected to the guide rod, a top plate fixedly connected to the upper end of the guide rod, a lifting screw rod vertically rotatably connected to the slide seat, a lifting screw rod nut sleeved on the lifting screw rod and rotatably connected to the top plate, and a lifting motor for driving the lifting screw rod nut to rotate, and the upper ends of the two pressure arms are mounted on the slide seat.

[0014] As an improvement of the present invention, a connecting plate is provided below the slide, and the connecting plate and the slide are connected by an elastic buffer. The upper ends of the two pressure arms are horizontally slidably connected to the connecting plate, and the sliding direction of the pressure arms on the connecting plate is the same as the axial direction of the supporting wheel to be tested. Each pressure arm is also provided with a fastening bolt for locking the corresponding pressure arm on the connecting plate, and the lower ends of the two pressure arms are fixedly connected to a first pressure sensor that is communicatively connected to the control module.

[0015] As an improvement of the present invention, the lateral load applying device includes a bracket and a screw servo motor installed on the bracket, the output screw of the screw servo motor is arranged parallel to or in a straight line with the support wheel to be tested, and the end of the output screw of the screw servo motor is fixedly connected to a second pressure sensor which is communicatively connected to the control module, and when in use, the second pressure sensor is pressed tightly against one of the pressure arms.

[0016] As an improvement of the present invention, it further comprises a frame, the bracket is vertically slidably connected to the frame, and the frame is provided with a lifting and adjusting device for driving the bracket to slide.

[0017] As an improvement of the present invention, the lifting and adjusting device includes an adjusting screw arranged vertically and rotatably connected to the bracket at the lower end, an adjusting screw nut sleeved on the adjusting screw and rotatably connected to the frame, and a handwheel for driving the adjusting screw nut to rotate.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects:

[0019] 1. By applying the lateral load applying device to the pressure arm, the stress state of the track roller when it is tilted can be simulated. At the same time, in cooperation with the vertical load applying device, various working conditions of the track roller can be simulated, and the test accuracy is relatively high.

[0020] 2. The track roller testing machine provided by the present invention can change one or more parameters of the track roller's rotation speed, steering, vertical load and lateral load during the test, which is closer to the actual use condition of the track roller and further improves the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the track wheel testing machine of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the position of the lateral load applying device of the track wheel testing machine of the present invention;

[0023] Figure 3It is a structural schematic diagram of the position of the lifting and lowering adjustment device of the track wheel testing machine of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the partial position of the rotating support device of the track roller testing machine of the present invention.

[0025] The markings in the figure correspond to the following:

[0026] 10-roller to be tested; 20-rotating support device;

[0027] 21-support; 22-friction support wheel;

[0028] 23-Servo motor; 24-Driven gear;

[0029] 25-driving gear; 26-belt assembly;

[0030] 27-reducer; 28-universal coupling;

[0031] 30-vertical load applying device; 31-pressure arm;

[0032] 32-sliding seat; 33-top plate;

[0033] 34-lifting screw rod; 35-lifting motor;

[0034] 36-connecting plate; 37-elastic buffer;

[0035] 38-first pressure sensor; 39-guide rod;

[0036] 40-lateral load applying device; 41-bracket;

[0037] 42-screw servo motor; 43-limiting member;

[0038] 44-a second pressure sensor; 50-a rack;

[0039] 60-oil collecting box; 70-lifting and adjusting device;

[0040] 71-adjusting screw rod; 72-adjusting screw rod nut;

[0041] 73-Handwheel. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] like Figure 1-Figure 4As shown, this embodiment provides a roller tester, including a control module (not shown in the figure), a rotating support device 20 for placing the roller 10 to be tested and driving the roller 10 to be tested to rotate, a vertical load applying device 30 located above the rotating support device 20, and a lateral load applying device 40 located on one side of the vertical load applying device 30. The control module is respectively connected to the rotating support device 20, the vertical load applying device 30 and the lateral load applying device 40 for controlling the working sequence of each device. It should be noted that the control module is a conventional module, such as an industrial computer, etc., which can be directly purchased from the market and set up according to actual functional requirements. It is not the focus of this embodiment and will not be described in detail here. It should also be noted that the roller 10 to be tested is not a part of the roller tester provided in this embodiment, but a test object of the roller tester provided in this embodiment. The roller 10 to be tested is a roller used in a conventional crawler walking mechanism, mainly including a wheel body and side covers respectively connected to both ends of the wheel body.

[0044] Preferably, the roller testing machine provided in this embodiment further comprises a frame 50 , and the rotation support device 20 , the vertical load applying device 30 and the lateral load applying device 40 are respectively mounted on the frame 50 .

[0045] The rotating support device 20 includes a support 21 fixedly connected to the frame 50, a friction support wheel 22 rotatably connected to the support 21, and a servo motor 23 for driving the friction support wheel 22 to rotate, wherein the support 21 includes two seats, there are two friction support wheels 22, and the two ends of each friction support wheel 22 are rotatably connected to each seat body, the two friction support wheels 22 are arranged parallel to each other and located on the same horizontal plane, and the distance between the two friction support wheels 22 is smaller than the outer contour diameter of the wheel body of the test roller 10, so that the test roller 10 can be prevented from falling on the two friction support wheels 22, and the three are arranged in a herringbone shape. In addition, an oil collecting box 60 is provided directly below the two friction support wheels 22, and the oil collecting box is located between the two seats, and is mainly used to collect lubricating oil dripping from the test roller 10 and the friction support wheel 22, as well as waste generated by the friction between the test roller 10 and the friction support wheel 22.

[0046] The specific transmission connection structure between the servo motor 23 and the two friction support wheels 22 can be a conventional structure, for example, pulleys are respectively arranged on the output shaft of the servo motor 23 and the two friction support wheels 22, and the transmission connection is realized by winding a transmission belt around the three pulleys. Preferably, in the present embodiment, one end of each friction support wheel 22 is respectively fixedly connected with a driven gear 24 coaxially arranged with the corresponding friction support wheel 22, and a transition gear (not shown in the figure) respectively meshing with the two driven gears 24 is rotatably connected to the support 21, and a driving gear 25 is meshed with the transition gear. Specifically, the thickness of the transition gear is greater than the sum of the thicknesses of the driven gear 24 and the driving gear 25, and the driven gear 24 and the driving gear 25 are staggered, so as to ensure that each driven gear and the driving gear 25 can mesh with the transition gear without interfering with each other. The driving gear 25 is connected to the servo motor 23 by transmission, so that the two friction support wheels 22 can be driven by the servo motor 23 to rotate in the same direction and at a constant speed, and then the tested supporting wheel 10 can be driven to rotate by friction. At the same time, the presence of the transition gear can effectively reduce the instantaneous load on the servo motor 23 when the rotating support device 20 is started, thereby increasing the service life of the servo motor 23.

[0047] The driving gear 25 and the servo motor 23 can be directly fixedly connected to achieve transmission connection. Preferably, in this embodiment, the output shaft of the servo motor 23 is connected to the reducer 27 through a belt assembly 26, and the output shaft of the reducer 27 and the driving gear 25 are connected to each other through a universal coupling 28. This is not only convenient for assembly, but also effectively isolates the transmission of radial transmission at both ends, which helps to ensure the working stability of the transmission system.

[0048] The vertical load applying device 30 includes two pressure arms 31 for respectively pressing the side covers of the roller 10 to be tested, that is, when in use, the two pressure arms 31 are pressed one by one on the two side covers. The vertical load applying device 30 also includes a guide rod 39 arranged vertically and fixedly connected to the frame 50, a slide seat 32 slidably connected to the guide rod 39, a top plate 33 fixedly connected to the upper end of the guide rod 39, a lifting screw 34 vertically rotatably connected to the slide seat 32, a lifting screw nut (not shown in the figure) sleeved on the lifting screw 34 and rotatably connected to the top plate 33, and a lifting motor 35 for driving the lifting screw nut to rotate, wherein the specific transmission connection structure between the lifting motor 35 and the lifting screw nut is a conventional structure, such as realizing transmission connection through a reducer or a bevel gear assembly, etc., which will not be described in detail here. Since the lifting screw 34 is fixedly connected to the slide seat 32, it will move up and down with the slide seat 32, so that the lifting screw 34 can be prevented from occupying the operating space below the slide seat 32.

[0049] The upper ends of the two pressure arms 31 are mounted on the slide 32. Specifically, a connecting plate 36 arranged parallel to the slide 32 is provided below the slide 32. The connecting plate 36 and the slide 32 are connected by an elastic buffer 37, wherein the elastic buffer 37 may be a rubber pad or a buffer spring. The upper ends of the two pressure arms 31 are horizontally slidably connected to the connecting plate 36. Of course, the connecting plate 36 needs to be provided with a slide rail for the sliding connection of the pressure arms 31. The sliding direction of each pressure arm 31 on the connecting plate 36 is the same as the axial direction of the roller 10 to be tested, so that it is convenient to adjust the distance between the two pressure arms 31 according to the length of the roller 10 to be tested. In addition, each pressure arm 31 is also provided with a fastening bolt (not shown in the figure) for locking the corresponding pressure arm 31 on the connecting plate 36 to prevent the pressure arm 31 from moving relative to the connecting plate 36 during use. The lower ends of the two pressure arms 31 are fixedly connected with a first pressure sensor 38 that is communicatively connected to the control module, which is used to feedback the pressure value to form a closed-loop feedback system and increase the test accuracy.

[0050] The lateral load applying device 40 acts on the pressure arms 31, and each lateral load applying device 40 acts on only one of the pressure arms 31. However, two lateral load applying devices 40 may be provided to act on the two pressure arms 31 respectively. Considering that when a lateral load is applied to one of the pressure arms 31, the other pressure arm 31 will inevitably not be subject to the lateral load, only one lateral load applying device 40 is provided in this embodiment.

[0051] The lateral load applying device 40 includes a bracket 41 indirectly mounted on the frame 50 and a screw servo motor 42 mounted on the bracket 41. The output screw of the screw servo motor 42 is arranged parallel to or in a straight line with the supporting roller 10 to be tested, one end of which faces the lower part of the corresponding pressure arm 31, and the other end is fixedly connected to the limit member 43, and the end of the output screw of the screw servo motor 42 is fixedly connected to a second pressure sensor 44 that is communicatively connected to the control module. The second pressure sensor 44 is located at one end of the output screw of the screw servo motor 42 facing the corresponding pressure arm 31, so that the second pressure sensor 44 can be pressed tightly against one of the pressure arms 31 when in use. It should be noted that during the test, if the lateral load applying device 40 has a pressure output, the pressure arm 31 matched therewith cannot be locked on the connecting plate 36.

[0052] Preferably, the bracket 41 is vertically slidably connected to the frame 50, that is, the frame 50 is provided with a slide rail for the bracket 41 to slide, and the bracket 41 is also provided with a locking bolt for locking the bracket 41 on the frame 50. When the height position of the bracket 41 needs to be adjusted, the locking bolt needs to be loosened. This facilitates the adjustment of the height position of the bracket 41 according to the actual specifications of the supporting roller 10 to be tested. Further, in this embodiment, the frame 50 is provided with a lifting and adjusting device 70 for driving the bracket 41 to slide. The lifting and adjusting device 40 includes an adjusting screw 71 arranged vertically and rotatably connected to the bracket 41 at the lower end, an adjusting screw nut 72 sleeved on the adjusting screw 71 and rotatably connected to the frame 50, and a handwheel 73 for driving the adjusting screw nut 72 to rotate, wherein the specific transmission connection structure between the handwheel 73 and the adjusting screw nut 72 is a conventional structure, such as realizing the transmission connection through a reducer or a bevel gear assembly, etc., which will not be described in detail here.

[0053] When in use, the roller 10 to be tested is placed on two friction support wheels 22, and then the two friction support wheels 22 are driven by the servo motor 23 to drive the roller 10 to be tested to rotate. At the same time, downward pressure is applied to the side cover of the roller 10 to be tested through the vertical load applying device 30, and axial pressure is applied to the roller 10 to be tested through the lateral load applying device 40 with the help of one of the pressure arms 31. During the entire test process, the speed, direction, vertical load and lateral load of the roller 10 to be tested can be changed according to pre-set rules.

[0054] The present invention is described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, which all belong to the protection scope of the present invention.

Claims

1. A track roller testing machine, characterized in that: The invention comprises a control module, a rotating support device for placing a roller to be tested and driving the roller to be tested to rotate, a vertical load applying device located above the rotating support device, and a lateral load applying device located on one side of the vertical load applying device, wherein the vertical load applying device comprises two pressure arms respectively used to press the side cover of the roller to be tested, the lateral load applying device acts on the pressure arms, and the control module is respectively connected to the rotating support device, the vertical load applying device and the lateral load applying device for communication; The rotating support device includes a support, a friction support wheel rotatably connected to the support, and a servo motor for driving the friction support wheel to rotate. There are two friction support wheels, which are arranged parallel to each other and located on the same horizontal plane, and the distance between the two friction support wheels is smaller than the outer contour diameter of the wheel body of the load roller to be tested. The vertical load applying device also includes a vertically arranged guide rod, a slide seat slidably connected to the guide rod, a top plate fixedly connected to the upper end of the guide rod, a lifting screw rod vertically rotatably connected to the slide seat, a lifting screw rod nut sleeved on the lifting screw rod and rotatably connected to the top plate, and a lifting motor for driving the lifting screw rod nut to rotate, and the upper ends of the two pressure arms are mounted on the slide seat; The lateral load applying device includes a bracket and a screw servo motor installed on the bracket, the output screw of the screw servo motor is arranged parallel to or in a straight line with the support wheel to be tested, and the end of the output screw of the screw servo motor is fixedly connected to a second pressure sensor that is communicatively connected to the control module. When in use, the second pressure sensor is pressed tightly against one of the pressure arms.

2. The track roller testing machine according to claim 1, characterized in that: One end of each friction support wheel is fixedly connected to a driven gear coaxially arranged with the corresponding friction support wheel, and a transition gear respectively meshing with the two driven gears is rotatably connected to the support, and a driving gear is meshed with the transition gear, and the driving gear is transmission-connected to the servo motor.

3. The track roller testing machine according to claim 2, characterized in that: The output shaft of the servo motor is connected to a reducer through a belt assembly, and the output shaft of the reducer and the driving gear are connected through a universal coupling.

4. The track roller testing machine according to claim 3, characterized in that: An oil collecting box is arranged below the two friction support wheels.

5. The track roller testing machine according to claim 1, characterized in that: A connecting plate is provided below the slide, and the connecting plate and the slide are connected via an elastic buffer, the upper ends of the two pressure arms are horizontally slidably connected to the connecting plate, and the sliding direction of the pressure arms on the connecting plate is the same as the axial direction of the supporting roller to be tested, and each of the pressure arms is further provided with a fastening bolt for locking the corresponding pressure arm on the connecting plate, and the lower ends of the two pressure arms are fixedly connected to a first pressure sensor communicatively connected to the control module.

6. The track roller testing machine according to claim 1, characterized in that: It also includes a frame, the bracket is vertically slidably connected to the frame, and the frame is provided with a lifting and adjusting device for driving the bracket to slide.

7. The track roller testing machine according to claim 6, characterized in that: The lifting and lowering adjustment device comprises an adjusting screw rod which is arranged vertically and rotatably connected to the bracket at its lower end, an adjusting screw rod nut which is sleeved on the adjusting screw rod and rotatably connected to the frame, and a hand wheel for driving the adjusting screw rod nut to rotate.

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