A wheel annular soil groove test bench

Abstract

A wheel annular soil trough test bench is used to test the wheel life, load-bearing capacity and traction performance. It consists of a slewing arm, a slewing arm fixing frame, a trolley, a soil trough and a circular guide rail. The soil trough consists of a square outer frame and a circular inner frame, and a simulated road surface is laid in the soil trough; the circular guide rail is installed on the inner side of the circular inner frame of the soil trough; the slewing arm fixing frame is fixedly installed on the ground at the center of the soil trough. The present invention can be used for life test and load-bearing capacity test of wheels of different diameters, and can also be used to test the traction performance of the tested wheels. It has a simple structure, is easy to maintain and has a low cost.

Description

Technical Field

[0001] The invention relates to the field of wheel performance testing, and in particular to a wheel annular soil groove test bench which can be used for wheel life testing, load-bearing capacity testing and traction performance testing. Background Art

[0002] Life is one of the important indicators for evaluating wheel performance. At present, there are three main methods for wheel life testing. The first is outdoor road test, the second is test device simulation test, and the third is soil trough simulation test. Outdoor road test often cannot ensure ground consistency. Soil moisture content, ground load history, operation method, and operation time will affect the test results. At the same time, the test is also affected by weather and other external conditions. Outdoor vehicle test also has problems such as high cost, difficult organization, and long time. Test device simulation test, such as vertical wheel life test bench, installs the wheel on the test bench, adds vertical load to the wheel, and installs a rolling roller below the contact position with the vehicle. The surface of the rolling roller simulates the road surface and has a friction coefficient. The speed of the wheel is changed by increasing the speed of the rolling roller; the side-mounted wheel life test bench has a rolling roller driven by a motor on one side in the horizontal direction. The surface of the rolling roller is attached with friction material and has a certain friction coefficient. The wheel is supported by the support frame on the other side, and the positive pressure between the wheel and the rolling roller is applied by a hydraulic cylinder drive. The advantage of testing wheel life through test equipment is that it can be carried out indoors, the environment is controllable, and the cost is low. The disadvantage is that it is difficult to simulate soft roads, uneven roads, and large obstacle roads. The soil trough simulation test is to lay the road surface in the soil trough according to the test needs, and use the corresponding device to test the wheel life. Relatively speaking, it can simulate a variety of road surfaces, adjust the load in real time according to the needs, control the test process, and the test is repeatable, with better test results and lower costs.

[0003] Domestic and foreign companies and research institutions have developed and designed different soil trough test devices, which are basically linear and circular. The linear soil trough is generally not used for life tests due to length restrictions, limited one-way travel distance, and different wheel stress conditions during reciprocating travel. The circular soil trough can operate continuously and is a better choice for life tests.

[0004] In response to the needs of wheel life testing, this patent discloses a wheel annular soil trough test bench. Compared with similar annular soil trough test benches, the wheel annular soil trough test bench described in this patent has a simpler structure, and the track-type trolley and rotation control make the posture control of the tested wheel more reliable and the test results more accurate. The test bench can be used for wheel life testing, load-bearing capacity testing, and traction performance testing. Summary of the invention

[0005] The invention discloses a wheel annular soil groove test bench which can be used for wheel life test.

[0006] A wheel annular soil trough test bench comprises a rotating arm, a rotating arm fixing frame, a trolley, a soil trough and a circular guide rail;

[0007] The soil trough is composed of a square outer frame and a circular inner frame. Various simulated road surfaces can be laid in the soil trough according to test requirements.

[0008] The circular guide rail is installed on the inner side of the circular inner frame of the soil trough. The circular guide rail is composed of multiple height-adjustable brackets and multiple sections of guide rails. The bottom of the adjustable bracket is installed on the ground, and the multiple sections of guide rails are installed on the top of the adjustable bracket. The multiple sections of guide rails are connected at the first position to form a smooth circular guide rail; the circular guide rail is a horizontal circular ring track of a certain width, which can provide support and travel track for the trolley; the track is connected by multiple independent circular arc guide ends, and the bottom bracket height is 400-500mm to avoid soil covering the track and affecting the sliding smoothness of the trolley.

[0009] The arm fixing frame is composed of a bottom fixing frame and a slewing column fixed on the bottom fixing frame. The arm fixing frame is fixedly installed on the ground at the center of gravity of the soil trough; the central slewing column plays the role of fixing the center of the slewing circle. By pulling the slewing arm, the trolley is ensured to rotate in the track to provide support for the tested wheel; the slewing column is equipped with a slip ring to provide power and signal cable connection for the trolley and the measurement and control mechanism;

[0010] The swivel arm is composed of a first pull rod, a second pull rod, a third pull rod, a first pull rod constraint frame, a second pull rod constraint frame and a swivel arm bracket. One ends of the first pull rod, the second pull rod and the third pull rod of the swivel arm are installed on the swivel column on the swivel arm fixing frame through bearings, and the other ends of the first pull rod, the second pull rod and the third pull rod are fixedly connected to the swivel arm bracket; the first pull rod, the second pull rod and the third pull rod are distributed in a crossed triangle in space, and their relative positions are constrained by the first pull rod constraint frame and the second pull rod constraint frame; the second pull rod and the third pull rod are equipped with accessory plates, and the test bench electronic control system components are placed on the accessory plates.

[0011] The trolley consists of a first wheel, a second wheel, a suspension fixing plate, an upper suspension frame, a lower suspension frame, a horn frame, a driving motor, a transmission shaft, a first universal joint, a second universal joint, a first trolley wheel axle, a second trolley wheel axle, a test wheel axle, a first load frame, and a second load frame; under the constraint of the slewing arm, the trolley can only slew on the circular plane track while ensuring the overall verticality of the trolley to the ground; the driving motor of the test wheel is installed on the slewing arm bracket to reduce the influence of the driving motor mass on the test of the test wheel; the suspension fixing plate is installed at different heights to meet the test requirements of test wheels of different specifications.

[0012] The main function of the trolley is to provide support, guidance and traction resistance for the wheels under test; one end of the first axle of the first wheel and the second axle of the second wheel of the trolley are supported on the swing arm bracket through bearings, and the other ends of the first axle and the second axle are supported on the suspension fixing plate through bearings; due to the limitations of the two-wheel support mechanism and the swing arm, the trolley can only travel on the circular guide rail; the first wheel and the second wheel adopt narrow tires of hub motors for the purpose of lightweight; the first wheel and the second wheel are independently driven by hub motors installed on the axles, thereby driving the trolley to move. The wheel under test is installed on the trolley, and the driving motor of the wheel under test is installed on the swing arm bracket, which can make circular motion along the outer side of the circular guide rail under the constraint of the swing arm; the output torque of the driving motor is transmitted to the tested wheel shaft through the first universal joint, the second universal joint, the first transmission shaft, and the second transmission shaft; the dynamic torque sensor test unit is installed on the output shaft of the driving motor of the tested wheel to measure the rotation speed and driving torque of the tested wheel; the displacement sensor is installed on the tested wheel shaft to measure the wheel sinking amount; the dynamic torque sensor test unit is installed on the electric wheel shaft of the trolley to measure the rotation speed and torque of the trolley. The slip rate of the tested wheel can be controlled by adjusting the difference between the trolley speed and the speed of the tested wheel.

[0013] One end of the upper suspension frame and the lower suspension frame is hinged to the mounting seat on the suspension fixing plate, and the other end of the upper suspension frame and the lower suspension frame is hinged to the mounting seat on the horn frame. When the wheel travels on an uneven road surface, the parallelogram mechanism composed of the upper suspension frame, the lower suspension frame, the suspension fixing frame and the horn frame can rise and fall; the horn frame is fixedly connected to the first load frame, and the second load frame is fixedly connected to the top of the first load frame, and a counterweight load can be carried on the second load frame according to test requirements; a vertical pole can be installed on the suspension fixing plate as needed, a cross bar is installed at the end of the vertical pole, and a camera equipment is installed on the cross bar to observe and shoot the driving conditions of the tested wheel.

[0014] The electronic control system components of the test bench include: measurement and control workbench, trolley wheel drive motor, test wheel drive motor, speed sensor, speed sensor, torque sensor, displacement sensor, tension sensor, angle sensor, etc.

[0015] A simulated road surface can be laid in the soil trench according to test requirements, including obstacle conditions, slope conditions, soft soil conditions, etc.

[0016] The present invention can also be used to test the traction performance of the wheel under test. The trolley speed can be controlled to make the trolley speed lower than the wheel speed. At this time, the trolley is in a dragged state, that is, resistance in the traction direction is applied to the wheel under test, thereby testing the traction performance of the wheel under test.

[0017] Beneficial effects of the present invention:

[0018] The invention can be used for life test and load-bearing capacity test of wheels with different diameters, and can also be used for testing the traction performance of the tested wheels, and has a simple structure, convenient maintenance and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the soil trough structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the positional relationship of the swivel arm, swivel arm fixing frame, trolley and circular guide rail of the present invention;

[0022] Figure 4 It is a schematic diagram of the circular guide rail structure of the present invention;

[0023] Figure 5 It is a schematic diagram of the assembly of the slewing arm, slewing arm fixing frame and trolley of the present invention;

[0024] Figure 6 It is a schematic diagram of the assembly relationship between the slewing arm and the trolley of the present invention;

[0025] Figure 7 and Figure 8 Schematic diagram of the trolley structure at different angles of the present invention.

[0026] In the figure: 1-swivel arm; 11-first tie rod; 13-second tie rod; 14-third tie rod; 12-first tie rod restraint frame; 15-second tie rod restraint frame; 16-test bench electronic control system components; 17-accessory board; 18-swivel arm bracket; 2-swivel arm fixing frame; 21-bottom fixing frame; 22-swivel column; 221-slip ring; 3-trolley; 31-drive motor; 32-first wheel; 34-second wheel; 33-first transmission shaft; 38-second transmission shaft; 35-suspension fixing plate; 351-installation position; 36-mounting seat; 37-first joint; 319-second universal joint; 39-first load frame; 314-second load frame; 310-upper suspension frame; 311-lower suspension frame; 312-horn frame; 313-mounting seat; 315-counterweight load; 316-vertical pole; 317-cross bar; 318-camera equipment; 320-first wheel axle, 321-second wheel axle; 322-test wheel axle; 4-ground; 5-soil trough; 51-square outer frame; 52-circular inner frame; 6-circular guide rail; 61-multi-section guide rail; 62-adjustable bracket; 7-simulated road surface; 8-test wheel. DETAILED DESCRIPTION

[0027] like Figure 1As shown, a wheel annular soil trough test bench comprises a swing arm 1, a swing arm fixing frame 2, a trolley 3, a soil trough 5 and a circular guide rail 6;

[0028] like Figure 2 As shown, the soil trough 5 is composed of a square outer frame 51 and a circular inner frame 52, and various simulated road surfaces 7 can be laid in the soil trough according to test requirements;

[0029] like Figure 3 and 4 As shown, the circular guide rail 6 is installed on the inner side of the circular inner frame 52 of the soil trough, and the circular guide rail 6 is composed of a plurality of height-adjustable brackets 62 and a multi-section guide rail 61. The bottom of the adjustable bracket 62 is installed on the ground 4, and the multi-section guide rail 61 is installed on the top of the adjustable bracket 62. The multi-section guide rail 61 is connected at the first position to form a smooth circular guide rail 6; the circular guide rail 6 is a horizontal circular ring track of a certain width, which can provide support and a driving track for the trolley; the track is connected by a plurality of independent circular arc guide rail ends, and the bottom bracket height is 400 to 500 mm to avoid the track being covered with soil and affecting the sliding smoothness of the trolley.

[0030] like Figure 3 and Figure 5 As shown, the arm fixing frame 2 is composed of a bottom fixing frame 21 and a slewing column 22 fixed on the bottom fixing frame 21. The arm fixing frame 2 is fixedly installed on the ground 4 at the center of gravity of the soil trough; the central slewing column 22 plays the role of fixing the center of the slewing circle, and by pulling the slewing arm, the trolley is ensured to rotate in the track to provide support for the tested wheel; the slewing column 22 is equipped with a slip ring 221 to provide power and signal cable connection for the trolley and the measurement and control mechanism;

[0031] like Figure 3 , Figure 5 and Figure 6 As shown, the swivel arm 1 is composed of a first tie rod 11, a second tie rod 13, a third tie rod 14, a first tie rod restraint frame 12, a second tie rod restraint frame 15 and a swing arm bracket 18. One ends of the first tie rod 11, the second tie rod 13 and the third tie rod 14 of the swivel arm 1 are mounted on a swivel column 22 on the swing arm fixing frame 2 through bearings, and the other ends of the first tie rod 11, the second tie rod 13 and the third tie rod 14 are fixedly connected to the swing arm bracket 18; the first tie rod 11, the second tie rod 13 and the third tie rod 14 are distributed in a cross triangle in space, and their relative positions are constrained by the first tie rod restraint frame 12 and the second tie rod restraint frame 15; the second tie rod 13 and the third tie rod 14 are provided with an accessory plate 17, on which the test bench electronic control system components 16 are placed.

[0032] like Figure 6 , Figure 7 and Figure 8As shown, the trolley 3 consists of a first wheel 32, a second wheel 34, a suspension fixing plate 35, an upper suspension frame 310, a lower suspension frame 311, a horn frame 312, a driving motor 31, a transmission shaft 33, a first universal joint 37, a second universal joint 319, a first trolley wheel axle 320, a second trolley wheel axle 321, a test wheel axle 322, a first load frame 39, and a second load frame 314; under the constraint of the slewing arm, the trolley can only slew on the circular plane track 6 while ensuring the overall verticality of the trolley to the ground; the driving motor 31 of the test wheel 8 is installed on the slewing arm bracket 18 to reduce the influence of the driving motor mass on the test wheel test; the suspension fixing plate 35 is installed at different heights 351 to meet the test requirements of test wheels 8 of different specifications.

[0033] The main function of the trolley 3 is to provide support, guidance and traction resistance for the test wheel 8; one end of the first axle 320 of the first wheel 32 and the second axle 321 of the second wheel 34 of the trolley 3 are supported on the swing arm bracket 18 through bearings, and the other ends of the first axle 320 and the second axle 321 are supported on the suspension fixing plate 35 through bearings; due to the limitations of the two-wheel support mechanism and the swing arm, the trolley 3 can only travel on the circular guide rail 6; the first wheel 32 and the second wheel 34 adopt narrow tires of hub motors for the purpose of lightweight; the first wheel 32 and the second wheel 34 are independently driven by hub motors installed on the axles, thereby driving the trolley 3 movement; the test wheel 8 is installed on the trolley 3, and the drive motor 31 of the test wheel 8 is installed on the swing arm bracket 18, which can make circular motion along the outer side of the circular guide rail 6 under the constraint of the swing arm 1; the output torque of the drive motor 31 is transmitted to the test wheel shaft 322 through the first universal joint 37, the second universal joint 319, the first transmission shaft 33, and the second transmission shaft 38; the dynamic torque sensor test unit is installed on the output shaft of the drive motor 31 of the test wheel 8, which can measure the test wheel speed and driving torque; the test wheel shaft 322 is equipped with a displacement sensor to measure the wheel sinking amount; the dynamic torque sensor test unit is installed on the electric wheel shaft of the trolley to measure the trolley speed and torque. The slip rate of the test wheel can be controlled by adjusting the difference between the trolley speed and the test wheel speed.

[0034] One end of the upper suspension frame 310 and the lower suspension frame 311 are hinged to the mounting seat 36 on the suspension fixing plate 35, and the other end of the upper suspension frame 310 and the lower suspension frame 311 are hinged to the mounting seat 313 on the horn frame 312. When the wheel 8 travels on an uneven road surface, the parallelogram mechanism composed of the upper suspension frame 310, the lower suspension frame 311, the suspension fixing frame 35, and the horn frame 312 can rise and fall; the horn frame 312 is fixedly connected to the first load frame 39, and the second load frame 314 is fixedly connected to the top of the first load frame 39. A counterweight load 315 can be carried on the second load frame 314 according to test requirements; a vertical pole 316 can be installed on the suspension fixing plate 35 as needed, a cross bar 317 is installed at the end of the vertical pole 316, and a camera device 318 is installed on the cross bar 317 to observe and shoot the driving conditions of the test wheel 8.

[0035] The electronic control system components 16 of the test bench include: a measurement and control workbench, a trolley wheel drive motor, a test wheel drive motor, a rotation speed sensor, a speed sensor, a torque sensor, a displacement sensor, a tension sensor, an angle sensor, etc.

[0036] A simulated road surface can be laid in the soil trough 5 according to test requirements, including obstacle-crossing road conditions, slope road conditions, soft soil road conditions, etc.

[0037] The present invention can also be used to test the traction performance of the wheel under test. The trolley speed can be controlled to make the trolley speed lower than the wheel speed. At this time, the trolley is in a dragged state, that is, resistance in the traction direction is applied to the wheel under test, thereby testing the traction performance of the wheel under test.

Claims

1. A wheel annular soil groove test bench, characterized in that: It comprises a rotating arm (1), a rotating arm fixing frame (2), a trolley (3), a soil trough (5) and a circular guide rail (6); The soil trough (5) is composed of a square outer frame (51) and a circular inner frame (52), and a simulated road surface (7) is laid in the soil trough (5); The circular guide rail (6) is installed on the inner side of the circular inner frame (52) of the soil trough. The circular guide rail (6) is composed of a plurality of height-adjustable brackets (62) and a plurality of guide rail sections (61). The bottom of the adjustable bracket (62) is installed on the ground (4). The plurality of guide rail sections (61) are installed on the top of the adjustable bracket (62). The plurality of guide rail sections (61) are connected at the first positions to form a smooth circular guide rail (6). The rotating arm fixing frame (2) is composed of a bottom fixing frame (21) and a slewing column (22) fixed on the bottom fixing frame (21); the rotating arm fixing frame (2) is fixedly installed on the ground (4) at the center of gravity of the soil trough, and a slip ring (221) is installed on the slewing column (22); The swivel arm (1) is composed of a first tie rod (11), a second tie rod (13), a third tie rod (14), a first tie rod restraining frame (12), a second tie rod restraining frame (15) and a swivel arm bracket (18); one end of the first tie rod (11), the second tie rod (13) and the third tie rod (14) of the swivel arm (1) is mounted on a swivel column (22) on a swivel arm fixing frame (2) via a bearing, and the other end of the first tie rod (11), the second tie rod (13) and the third tie rod (14) is fixedly connected to the swivel arm bracket (18); the first tie rod (11), the second tie rod (13) and the third tie rod (14) are distributed in a cross triangle in space, and their relative positions are restrained by the first tie rod restraining frame (12) and the second tie rod restraining frame (15); the second tie rod (13) and the third tie rod (14) are mounted with an accessory plate (17), and the test bench electronic control system components (16) are placed on the accessory plate (17); The trolley (3) is composed of a first wheel (32), a second wheel (34), a suspension fixing plate (35), an upper suspension frame (310), a lower suspension frame (311), a horn frame (312), a driving motor (31), a transmission shaft (33), a first universal joint (37), a second universal joint (319), a first wheel axle (320), a second wheel axle (321), a test wheel axle (322), a first load frame (39), and a second load frame (314); under the constraint of the slewing arm, the trolley can only move in a circular motion. The trolley (3) is configured to rotate and travel on a shaped plane track (6) while ensuring the verticality of the trolley as a whole to the ground; a driving motor (31) of the tested wheel (8) is installed on a rotating arm bracket (18); a hanging fixing plate (35) is installed at different heights (351) to meet the testing requirements of tested wheels (8) of different specifications; a first wheel axle (320) of a first wheel (32) of the trolley (3) and a second wheel axle (321) of a second wheel (34) are supported on the rotating arm bracket (18) through bearings, and the first wheel axle (320) and The other end of the second wheel axle (321) is supported on a suspension fixing plate (35) through a bearing; the first wheel (32) and the second wheel (34) are independently driven by a hub motor installed on the wheel axle, thereby driving the trolley (3) to move; the test wheel (8) is installed on the trolley (3), and the drive motor (31) of the test wheel (8) is installed on the swing arm bracket (18) and can perform circular motion along the outer side of the circular guide rail (6) under the constraint of the swing arm (1); the output torque of the drive motor (31) is transmitted through the first universal joint (37), The second universal joint (319), the first transmission shaft (33), and the second transmission shaft (38) are transmitted to the tested wheel shaft (322); a dynamic torque sensor test unit is installed on the output shaft of the driving motor (31) of the tested wheel (8), which can measure the rotation speed and driving torque of the tested wheel; a displacement sensor is installed on the tested wheel shaft (322), which can measure the wheel sinking amount; a dynamic torque sensor test unit is installed on the electric wheel shaft of the trolley, which can measure the rotation speed and torque of the trolley; and the slip rate of the tested wheel can be controlled by adjusting the difference between the trolley speed and the tested wheel speed; One end of the upper suspension frame (310) and the lower suspension frame (311) are hinged to a mounting seat (36) on a suspension fixing plate (35), and the other ends of the upper suspension frame (310) and the lower suspension frame (311) are hinged to a mounting seat (313) on a horn frame (312). When the wheel (8) travels on an uneven road surface, a parallelogram mechanism consisting of the upper suspension frame (310), the lower suspension frame (311), the suspension fixing frame (35), and the horn frame (312) can move up and down. The horn frame (312) is fixedly connected to the first load frame (39), and the second load frame (314) is fixedly connected to the top of the first load frame (39). A counterweight load (315) can be mounted on the second load frame (314) according to test requirements. A vertical rod (316) is installed on the suspension fixing plate (35), and a cross rod (317) is installed at the end of the vertical rod (316). A camera device (318) is installed on the cross rod (317) to observe and shoot the running condition of the tested wheel (8).

2. A wheel annular soil groove test bench according to claim 1, characterized in that: The test bench electronic control system device (16) comprises a measurement and control workbench, a platform wheel drive motor, a test wheel drive motor, a rotation speed sensor, a speed sensor, a torque sensor, a displacement sensor, a tension sensor, and an angle sensor.

3. The wheel annular soil groove test bench according to claim 1, characterized in that: The circular guide rail (6) is a horizontal circular ring rail that can provide support and a travel track for the trolley; the track is formed by connecting a plurality of independent circular arc guide rail ends, and the bottom bracket height is 400-500 mm to avoid soil covering the track and affecting the sliding smoothness of the trolley.

4. The wheel annular soil groove test bench according to claim 1, characterized in that: The simulated road surface in the soil trough (5) includes obstacle crossing road conditions, slope road conditions and soft soil road conditions.

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