A loader test platform

Abstract

The present invention relates to the technical field of testing devices, and discloses a loader test platform, including a base plate, a limit ring fixedly installed on the upper surface of the base plate, a turntable rotatably installed inside the limit ring, a plurality of different types of road surfaces evenly laid on the upper surface of the turntable in the circumferential direction, a column fixedly installed on the upper surface of the base plate located at the rotation center of the turntable, the column and the turntable are rotatably installed, a mounting frame fixedly installed on the upper surface of the base plate close to the limit ring, a traction test mechanism installed on the column, and a support mechanism installed inside the mounting frame. The present invention can provide data support by testing the traction of the loader on different road surfaces, help formulate the best operation strategy for different road surfaces, reduce fuel consumption and mechanical wear, and can prevent accidents or equipment damage caused by insufficient or excessive traction when the loader is operating on different road surfaces based on the test data.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, and in particular to a loader testing platform. Background Art

[0002] The working process of a loader is actually a process of power consumption. The power is generated by the engine and diverted to various systems for consumption. In order to reduce the fuel consumption of the whole machine and improve the efficiency of the whole machine, it is necessary to understand the distribution of the engine power between the hydraulic system and the transmission system. This requires testing the power consumed by the loader's related systems. The traction and digging force of the loader are also important technical parameters, which also need to be tested.

[0003] The existing loader test platform (Announcement No.: CN102901647B) has at least the following disadvantages: when testing the traction of the loader, the above patent connects the rear of the loader to the traction tester, and the tester can measure the traction value of the loader when the loader moves forward, and the technical parameters of the loader such as traction, digging force and lifting force can be tested on one platform; because the above patent cannot test the traction of the loader on different types of road surfaces when testing the traction of the loader, it is impossible to predict the use effect of the loader under different road conditions. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a loader testing platform.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A loader test platform comprises a base plate, a limiting ring is fixedly mounted on the upper surface of the base plate, a turntable is rotatably mounted inside the limiting ring, a plurality of different types of road surfaces are evenly paved in the circumferential direction of the upper surface of the turntable, a column is fixedly mounted on the upper surface of the base plate located at the rotation center of the turntable, the column is rotatably mounted between the turntable, a mounting frame is fixedly mounted on the upper surface of the base plate close to the limiting ring, a traction test mechanism is mounted on the column, and a support mechanism is mounted inside the mounting frame.

[0007] As a further solution of the present invention, the traction testing mechanism includes a rotating sleeve rotatably mounted on the top of the column, a traction tester is fixedly mounted on the top of the rotating sleeve, a mounting block is fixedly mounted on the connecting end of the traction tester, a thrust spring rod is fixedly mounted on the upper surface of the mounting block, the telescopic end of the thrust spring rod passes through the lower surface of the mounting block and is fixedly mounted with a latch, the side of the latch away from the rotating sleeve is arranged as an inclined surface, two guide rails are symmetrically fixedly mounted on the outer surface of the rotating sleeve, a cross bar is slidably mounted between the two guide rails, a socket matching the latch is provided on the upper surface at the center position of the cross bar, a traction rod is rotatably mounted on the outer surface of the cross bar close to the rotating sleeve, and an unlocking assembly is installed between the mounting block and the latch.

[0008] As a further solution of the present invention, the unlocking assembly includes an electromagnet fixedly mounted on the lower surface of the mounting block, and an iron plate is fixedly mounted on the outer surface of the latch located directly below the electromagnet.

[0009] As a further solution of the present invention, the supporting mechanism includes a first friction roller and a second friction roller rotatably installed inside the mounting frame, a one-way bearing is installed between the first friction roller and the inner wall of the mounting frame, a conveyor belt is sleeved on the outer surfaces of the first friction roller and the second friction roller, tensioning spring rods are fixedly installed between the inner walls on the opposite sides of the mounting frame close to the first friction roller and the second friction roller, a supporting roller is rotatably installed between the corresponding two tensioning spring rods, a transmission mechanism is installed between the second friction roller and the turntable, a limiting mechanism for limiting the first friction roller and the second friction roller is installed inside the mounting frame, and the limiting mechanism is arranged on the inner side of the supporting mechanism.

[0010] As a further solution of the present invention, the transmission mechanism includes a worm fixedly installed at the rotation center of the second friction roller, a limit block is fixedly installed on the upper surface of the base plate, a worm wheel is rotatably installed on the outer surface of the limit block, the worm wheel is meshed with the worm, a driving bevel gear is fixedly installed at the rotation center of the worm wheel, a support shaft is rotatably installed on the upper surface of the base plate, a driven bevel gear meshed with the driving bevel gear is fixedly installed on the outer surface of the support shaft, an installation opening is penetrated through the outer surface of the limit ring, a driving gear is rotatably installed inside the installation opening, a plurality of tooth grooves meshed with the driving gear are evenly opened on the outer periphery of the turntable, and a transmission assembly is installed between the driving gear and the support shaft.

[0011] As a further solution of the present invention, the transmission assembly includes a pulley fixedly mounted on the support shaft and the rotation center of the driving gear, and the outer surfaces of the two pulleys are sleeved with belts.

[0012] As a further solution of the present invention, the limiting mechanism includes a support plate that is slidably installed inside the installation frame, and a plurality of guide rods are evenly fixedly installed on the upper surface of the base plate. The top ends of the guide rods pass through the outer surface of the support plate and are slidably installed therewith. The outer surface of the guide rods is sleeved with a support spring, and the support spring is arranged between the support plate and the base plate. The inner walls of the installation frame close to the first friction roller and the second friction roller are slidably installed with a clamping block, and a push-pull assembly is installed between the support plate and the clamping block.

[0013] As a further solution of the present invention, the push-pull assembly includes two groups of rotating rods symmetrically rotatably mounted on the surface of the support plate, and one end of each group of rotating rods away from the support plate is rotatably mounted on the outer surface of the corresponding abutment block.

[0014] As a further solution of the present invention, ramps are fixedly installed between the outer surfaces of opposite sides of the installation frame and the bottom plate, and a retaining wall is fixedly installed on the upper surface of the bottom plate at one end away from the turntable.

[0015] The beneficial effects of the present invention are:

[0016] 1. After the traction test of the loader on one of the road surfaces is completed, the electromagnet installed under the mounting block is energized for a certain period of time, so that the electromagnet generates magnetic force to adsorb the iron plate, and the pin is pulled out of the socket by moving the iron plate upward to unlock the crossbar. At this time, the loader can be started to move forward, so that the loader can drive the crossbar as a whole to move along the guide rail until the loader drives out of the turntable, which is convenient for the subsequent turntable to rotate a certain angle. After switching to different road surfaces, when the loader reverses to the switched road surface, the crossbar can automatically connect with the pin to perform another traction test operation. There is no need to disassemble and connect the trailer hook and the traction bar of the loader every time, which can effectively improve the test efficiency of the traction of the loader on different road surfaces;

[0017] 2. By testing the traction of the loader on different road surfaces, data support can be provided to help formulate the best operating strategy for different road surfaces, reduce fuel consumption and mechanical wear, and based on the test data, prevent accidents or equipment damage caused by insufficient or excessive traction when the loader is operating on different road surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a loader test platform in use according to the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of a loader test platform proposed by the present invention;

[0020] Figure 3 A schematic diagram of the bottom plate structure of a loader test platform proposed by the present invention;

[0021] Figure 4 A schematic diagram of the turntable structure of a loader test platform proposed by the present invention;

[0022] Figure 5 A schematic diagram of the bottom structure of a support plate of a loader test platform proposed by the present invention;

[0023] Figure 6 A schematic diagram of the guide rail structure of a loader test platform proposed by the present invention;

[0024] Figure 7 for Figure 3 A magnified view of the structure at center;

[0025] Figure 8 for Figure 4 A magnified view of the structure at B in the middle;

[0026] Fig. 9 for Figure 6 A magnified view of the structure at C in the middle;

[0027] Fig.10 This is a schematic diagram of the support roller and tension spring rod structure of a loader test platform proposed by the present invention.

[0028] In the figure: 1, bottom plate; 2, limit ring; 3, turntable; 4, road surface; 5, column; 6, mounting frame; 7, one-way bearing; 8, first friction roller; 9, second friction roller; 10, conveyor belt; 11, support roller; 12, rotating sleeve; 13, guide rail; 14, cross bar; 15, traction rod; 16, traction force tester; 17, thrust spring rod; 18, latch; 19, socket; 20, mounting block; 21, electromagnet; 22, iron plate; 23, support plate; 24, guide rod; 25, support spring; 26, rotating rod; 27, tightening block; 28, worm; 29, limit block; 30, worm wheel; 31, active bevel gear; 32, support shaft; 33, driven bevel gear; 34, driving gear; 35, pulley; 36, belt; 37, ramp plate; 38, retaining wall; 39, tensioning spring rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] See attached Figure 1 -Attached Fig.10A loader test platform includes a base plate 1, a limit ring 2 is fixedly installed on the upper surface of the base plate 1, a turntable 3 is rotatably installed inside the limit ring 2, a plurality of different types of road surfaces 4 (different types of road surfaces 4 can be soil, gravel or hardened road surfaces, etc.) are evenly paved in the circumferential direction of the upper surface of the turntable 3, a column 5 is fixedly installed on the upper surface of the base plate 1 located at the rotation center of the turntable 3, the column 5 is rotatably installed between the turntable 3, an installation frame 6 is fixedly installed on the upper surface of the base plate 1 near the limit ring 2, a traction test mechanism is installed on the column 5, and a support mechanism is installed inside the installation frame 6.

[0032] In this embodiment, the traction test mechanism includes a rotating sleeve 12 rotatably mounted on the top of the column 5, a traction tester 16 is fixedly mounted on the top of the rotating sleeve 12, a mounting block 20 is fixedly mounted on the connecting end of the traction tester 16, a thrust spring rod 17 is fixedly mounted on the upper surface of the mounting block 20, and the telescopic end of the thrust spring rod 17 penetrates the lower surface of the mounting block 20 and is fixedly mounted with a latch 18, and the side of the latch 18 away from the rotating sleeve 12 is set as an inclined surface, and the inclined surface setting allows the cross bar 14 to move toward the latch 18. When the cross bar 14 is in the state of being moved, the inclined surfaces of the cross bar 14 are against each other, so that the latch 18 can be automatically inserted into the socket 19 at the top of the cross bar 14 under the elastic force of the thrust spring rod 17; two guide rails 13 are symmetrically and fixedly installed on the outer surface of the rotating sleeve 12, and the cross bar 14 is slidably installed between the two guide rails 13, and the upper surface at the center of the cross bar 14 is provided with a socket 19 matching the latch 18, and the outer surface of the cross bar 14 close to the rotating sleeve 12 is rotatably installed with a traction rod 15, and an unlocking component is installed between the mounting block 20 and the latch 18.

[0033] When in use, the rear end of the loader is driven from the ramp 37 onto the conveyor belt 10, and then reverses to one of the road surfaces 4 on the turntable 3, connects the traction rod 15 with the trailer hook of the loader, starts the loader to move forward, and pulls the cross bar 14 to move through the traction rod 15. In the test state, the pin 18 is inserted into the socket 19 of the cross bar 14, so that the cross bar 14 can pull the connecting end of the traction tester 16 through the pin 18 and the thrust spring rod 17 when being pulled, so that the traction of the loader on this road surface 4 can be measured by the traction tester 16.

[0034] In this embodiment, the unlocking component includes an electromagnet 21 fixedly mounted on the lower surface of the mounting block 20. The electromagnet 21 is controlled by an external controller matched therewith, and the control circuit can be implemented by simple programming by technicians in this field. It is common knowledge in the field and is only used but not improved. No further details are given here. An iron plate 22 is fixedly mounted on the outer surface of the latch 18 directly below the electromagnet 21.

[0035] After the traction force test of the loader on one of the road surfaces 4 is completed, the electromagnet 21 installed under the mounting block 20 is energized for a certain period of time, so that the electromagnet 21 generates magnetic force to adsorb the iron plate 22, and the iron plate 22 moves upward to pull the pin 18 out of the socket 19, thereby unlocking the cross bar 14.

[0036] In this embodiment, the supporting mechanism includes a first friction roller 8 and a second friction roller 9 rotatably installed inside the mounting frame 6, a one-way bearing 7 is installed between the first friction roller 8 and the inner wall of the mounting frame 6, a conveyor belt 10 is sleeved on the outer surfaces of the first friction roller 8 and the second friction roller 9, and a tensioning spring rod 39 is fixedly installed between the inner walls of the mounting frame 6 on both sides of the opposite sides close to the first friction roller 8 and the second friction roller 9, and a supporting roller 11 is rotatably installed between the corresponding two tensioning spring rods 39, and the supporting roller 11 is abutted against the inner side of the conveyor belt 10, so that the conveyor belt 10 has a certain amount of activity, so that the loader can press the pallet 23 downward; a transmission mechanism is installed between the second friction roller 9 and the turntable 3, and a limiting mechanism for limiting the first friction roller 8 and the second friction roller 9 is installed inside the mounting frame 6, and the limiting mechanism is located on the inner side of the supporting mechanism. The limiting mechanism includes a support plate 23 that is slidably installed inside the mounting frame 6, the upper surface of the support plate 23 is against the inner top of the conveyor belt 10, and the width of the support plate 23 matches the width of the conveyor belt 10, and a plurality of guide rods 24 are evenly fixedly installed on the upper surface of the base plate 1, the top of the guide rod 24 passes through the outer surface of the support plate 23 and is slidably installed therewith, the outer surface of the guide rod 24 is sleeved with a support spring 25, and the support spring 25 is arranged between the support plate 23 and the base plate 1, and the inner wall of the mounting frame 6 near the first friction roller 8 and the second friction roller 9 is slidably installed with a clamping block 27, and a push-pull assembly is installed between the support plate 23 and the clamping block 27, and the push-pull assembly includes two groups of rotating rods 26 that are symmetrically rotatably installed on the surface of the support plate 23 in pairs, and the end of each group of rotating rods 26 away from the support plate 23 is rotatably installed on the outer surface of the corresponding clamping block 27.

[0037] When the loader moves from the turntable 3 to the conveyor belt 10, the weight of the loader will press the pallet 23 downward, so that the rotating rod 26 rotatably installed on the lower surface of the pallet 23 can push the clamping block 27, so that the clamping block 27 can clamp the first friction roller 8 and the second friction roller 9, to prevent the conveyor belt 10 from rotating when the loader is traveling on the conveyor belt 10, resulting in the loader being unable to completely travel onto the conveyor belt 10, thereby affecting the subsequent switching operation of the turntable 3 to different road surface 4 positions.

[0038] In this embodiment, the transmission mechanism includes a worm 28 fixedly mounted on the rotation center of the second friction roller 9, a limit block 29 fixedly mounted on the upper surface of the base plate 1, a worm wheel 30 rotatably mounted on the outer surface of the limit block 29, the worm wheel 30 meshes with the worm 28, and the self-locking characteristics of the worm 28 and the worm wheel 30 can prevent the turntable 3 from rotating automatically after being subjected to force during the test operation of the loader; a driving bevel gear 31 is fixedly mounted on the rotation center of the worm wheel 30, a support shaft 32 is rotatably mounted on the upper surface of the base plate 1, a driven bevel gear 33 meshing with the driving bevel gear 31 is fixedly mounted on the outer surface of the support shaft 32, an installation opening is provided through the outer surface of the limit ring 2, a driving gear 34 is rotatably mounted inside the installation opening, a plurality of tooth grooves meshing with the driving gear 34 are evenly provided on the outer periphery of the turntable 3, a transmission assembly is installed between the driving gear 34 and the support shaft 32, and the transmission assembly includes a pulley 35 fixedly mounted on the support shaft 32 and the rotation center of the driving gear 34, and a belt 36 is sleeved on the outer surfaces of the two pulleys 35.

[0039] When the conveyor belt 10 moves, it will drive the second friction roller 9 to rotate, so that the second friction roller 9 drives the worm 28 fixedly mounted thereon to rotate, and the worm 28 drives the worm wheel 30 meshing therewith to rotate, so that the worm wheel 30 drives the driven bevel gear 33 to rotate through the active bevel gear 31, so that the driven bevel gear 33 can drive the driving gear 34 to rotate through the support shaft 32, the pulley 35 and the belt 36, so that the driving gear 34 can drive the turntable 3 to rotate through the tooth grooves provided on the outer periphery of the turntable 3, until the next different type of road surface 4 on the turntable 3 rotates to the tail of the loader, and the loader is stopped so that the loader can subsequently reverse to a different road surface 4 for traction test.

[0040] In this embodiment, ramps 37 are fixedly installed between the outer surfaces of the mounting frame 6 on opposite sides and the base plate 1, and a retaining wall 38 is fixedly installed on the upper surface of the base plate 1 away from the turntable 3, and the retaining wall 38 is used to block the loader.

[0041] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when in use, the rear end of the loader is driven from the ramp 37 to the conveyor belt 10, and then reverses to one of the road surfaces 4 on the turntable 3, connects the traction rod 15 with the trailer hook of the loader, starts the loader to move forward, and causes the loader to pull the cross bar 14 to move through the traction rod 15. In the test state, the latch 18 is inserted into the insertion hole 19 of the cross bar 14, so that the cross bar 14 can pull the connecting end of the traction tester 16 through the latch 18 and the thrust spring rod 17 when being pulled, so that the traction of the loader on this road surface 4 can be measured by the traction tester 16;

[0042] After the traction test of the loader on one of the road surfaces 4 is completed, the electromagnet 21 installed under the mounting block 20 is energized for a certain period of time, so that the electromagnet 21 generates magnetic force to adsorb the iron plate 22, and the latch 18 is pulled out of the socket 19 by the upward movement of the iron plate 22, and the cross bar 14 is unlocked. At this time, the loader can be started to move forward, so that the loader can drive the cross bar 14 to move along the guide rail 13 as a whole, until the loader drives out of the turntable 3, which is convenient for the subsequent turntable 3 to rotate a certain angle. After switching to a different road surface 4, when the loader reverses to the switched road surface 4, the cross bar 14 can automatically connect with the latch 18 to perform another traction test operation, without the need to disassemble and connect the loader's trailer hook and the traction rod 15 each time, which can effectively improve the test efficiency of the loader's traction on different road surfaces 4.

[0043] When the loader moves from the turntable 3 to the conveyor belt 10, the weight of the loader will press the support plate 23 downward, so that the rotating rod 26 rotatably installed on the lower surface of the support plate 23 can push the pressing block 27, so that the pressing block 27 can press the first friction roller 8 and the second friction roller 9, to prevent the conveyor belt 10 from rotating when the loader moves on the conveyor belt 10, resulting in the loader being unable to completely move onto the conveyor belt 10, thereby affecting the subsequent switching operation of the turntable 3 to different road surface 4 positions;

[0044] When the front and rear wheels of the loader respectively travel to between the support roller 11 and the first friction roller 8 and the second friction roller 9, the support plate 23 will be reset upward under the elastic force of the support spring 25, so that the rotating rod 26 can pull the clamping block 27 to no longer limit the first friction roller 8 and the second friction roller 9. At this time, the loader starts to travel forward, and the front and rear wheels of the loader will drive the conveyor belt 10 to move through the friction force when rotating, so that the loader is in a slipping state. At the same time, the conveyor belt 10 will drive the second friction roller 9 to rotate when moving, so that the second friction roller 9 drives the fixed mounting thereon to move. The worm 28 rotates, so that the worm 28 drives the worm wheel 30 meshing with it to rotate, so that the worm wheel 30 drives the driven bevel gear 33 to rotate through the active bevel gear 31, so that the driven bevel gear 33 can drive the driving gear 34 to rotate through the support shaft 32, the pulley 35 and the belt 36, so that the driving gear 34 can drive the turntable 3 to rotate through the tooth grooves provided on the outer periphery of the turntable 3, until the next different type of road surface 4 on the turntable 3 rotates to the tail of the loader, and the loader is stopped so that the loader can subsequently reverse to a different road surface 4 to perform traction test;

[0045] By testing the traction of the loader on different road surfaces4, data support can be provided to help formulate the best operation strategy for different road surfaces4, reduce fuel consumption and mechanical wear, and prevent accidents or equipment damage caused by insufficient or excessive traction when the loader is operating on different road surfaces4 based on the test data;

[0046] After the road surface 4 on the turntable 3 is switched, the loader reverses and drives onto the road surface 4 on the turntable 3 to perform traction test operations on different road surfaces 4; since the first friction roller 8 is rotatably mounted with the mounting frame 6 through the one-way bearing 7, when the loader reverses, the reverse rotation of the wheel will not drive the conveyor belt 10 to move in the opposite direction, so that the loader can reverse smoothly and drive onto the turntable 3;

[0047] After the test is completed, the connection between the towing rod 15 and the loader trailer hook is disconnected, and the loader drives onto the conveyor belt 10 and then drives away from the ramp 37.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A loader test platform, comprising a base plate (1), characterized in that: A limit ring (2) is fixedly mounted on the upper surface of the base plate (1), a turntable (3) is rotatably mounted inside the limit ring (2), a plurality of different types of road surfaces (4) are evenly laid in the circumferential direction of the upper surface of the turntable (3), a column (5) is fixedly mounted on the upper surface of the base plate (1) located at the rotation center of the turntable (3), the column (5) is rotatably mounted between the turntable (3), a mounting frame (6) is fixedly mounted on the upper surface of the base plate (1) close to the limit ring (2), a traction force testing mechanism is mounted on the column (5), and the mounting frame (6) ) is internally mounted with a support mechanism, the traction force testing mechanism comprising a rotating sleeve (12) rotatably mounted on the top of the column (5), a traction force tester (16) being fixedly mounted on the top of the rotating sleeve (12), a mounting block (20) being fixedly mounted on the connecting end of the traction force tester (16), a thrust spring rod (17) being fixedly mounted on the upper surface of the mounting block (20), a telescopic end of the thrust spring rod (17) penetrating the lower surface of the mounting block (20) and being fixedly mounted with a latch (18), the latch (18) being disposed on a side away from the rotating sleeve (12) The outer surface of the rotating sleeve (12) is symmetrically fixed with two guide rails (13), a cross bar (14) is slidably installed between the two guide rails (13), a plug hole (19) matching the latch (18) is opened on the upper surface of the center position of the cross bar (14), a traction rod (15) is rotatably installed on the outer surface of the cross bar (14) close to the rotating sleeve (12), and an unlocking component is installed between the mounting block (20) and the latch (18); the rear end of the loader drives from the ramp plate (37) to the conveyor belt (10), and then reverses to the turntable (3) On one of the road surfaces (4) on the vehicle, a traction rod (15) is connected to a trailer hook of a loader, and the loader is started to move forward, so that the loader pulls the cross bar (14) to move through the traction rod (15). In a test state, a latch (18) is inserted into a socket (19) of the cross bar (14), so that when the cross bar (14) is pulled, the latch (18) and the thrust spring rod (17) can pull the connecting end of the traction tester (16), so that the traction of the loader on the road surface (4) can be measured by the traction tester (16).

2. A loader test platform according to claim 1, characterized in that: The unlocking assembly comprises an electromagnet (21) fixedly mounted on the lower surface of the mounting block (20), and an iron plate (22) is fixedly mounted on the outer surface of the latch (18) located directly below the electromagnet (21).

3. A loader test platform according to claim 1, characterized in that: The support mechanism comprises a first friction roller (8) and a second friction roller (9) which are rotatably mounted inside a mounting frame (6); a one-way bearing (7) is mounted between the first friction roller (8) and the inner wall of the mounting frame (6); a conveyor belt (10) is sleeved on the outer surfaces of the first friction roller (8) and the second friction roller (9); tension spring rods (39) are fixedly mounted between the inner walls of the mounting frame (6) on both sides of the opposite sides close to the first friction roller (8) and the second friction roller (9); a support roller (11) is rotatably mounted between the two corresponding tension spring rods (39); a transmission mechanism is mounted between the second friction roller (9) and the turntable (3); a limiting mechanism for limiting the first friction roller (8) and the second friction roller (9) is mounted inside the mounting frame (6); and the limiting mechanism is arranged on the inner side of the support mechanism.

4. A loader test platform according to claim 3, characterized in that: The transmission mechanism comprises a worm (28) fixedly mounted on the rotation center of the second friction roller (9); a limit block (29) fixedly mounted on the upper surface of the base plate (1); a worm wheel (30) rotatably mounted on the outer surface of the limit block (29); the worm wheel (30) meshes with the worm (28); a driving bevel gear (31) fixedly mounted on the rotation center of the worm wheel (30); a support shaft (32) rotatably mounted on the upper surface of the base plate (1); a driven bevel gear (33) meshing with the driving bevel gear (31) fixedly mounted on the outer surface of the support shaft (32); a mounting opening is formed through the outer surface of the limit ring (2); a driving gear (34) is rotatably mounted inside the mounting opening; a plurality of tooth grooves meshing with the driving gear (34) are evenly formed on the outer periphery of the turntable (3); a transmission assembly is mounted between the driving gear (34) and the support shaft (32).

5. A loader test platform according to claim 4, characterized in that: The transmission assembly comprises a pulley (35) fixedly mounted on the support shaft (32) and the rotation center of the driving gear (34), and the outer surfaces of the two pulleys (35) are sleeved with belts (36).

6. A loader test platform according to claim 5, characterized in that: The limiting mechanism comprises a support plate (23) which penetrates and is slidably mounted inside the mounting frame (6); a plurality of guide rods (24) are evenly fixedly mounted on the upper surface of the base plate (1); the top ends of the guide rods (24) penetrate the outer surface of the support plate (23) and are slidably mounted therewith; the outer surfaces of the guide rods (24) are sleeved with support springs (25); the support springs (25) are arranged between the support plate (23) and the base plate (1); inner walls of the mounting frame (6) close to the first friction roller (8) and the second friction roller (9) are slidably mounted with abutment blocks (27); and a push-pull assembly is installed between the support plate (23) and the abutment blocks (27).

7. A loader test platform according to claim 6, characterized in that: The push-pull assembly comprises two groups of rotating rods (26) symmetrically rotatably mounted on the surface of the support plate (23), with one end of each group of rotating rods (26) away from the support plate (23) being rotatably mounted on the outer surface of a corresponding abutting block (27).

8. The loader test platform according to claim 1, characterized in that: Slope plates (37) are fixedly mounted between the outer surfaces of opposite sides of the installation frame (6) and the bottom plate (1), and a retaining wall (38) is fixedly mounted on the upper surface of the bottom plate (1) at one end away from the turntable (3).

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