A test bench for testing low-temperature rubber suspension systems of snow groomers

Abstract

The present invention discloses a test bench for testing the low-temperature rubber suspension system of a snow groomer, comprising a base, a column fixedly mounted on the top of the base, a first group of cross beams provided on the inner side of the column, a second group of cross beams provided on the inner side of the column at the bottom of the first group of cross beams, a first displacement sensor fixedly mounted on the middle of the top of the first group of cross beams, a sliding column fixedly mounted on the top of the second group of cross beams, a force-adding column provided on the upper end of the column, a pin hinged on the left side of the top of the column, and a weight placement platform hinged on the left side of the top of the column via the pin. The present invention adopts the above-mentioned structure, and this test bench can study the static and dynamic mechanical properties of the rubber suspension system at different temperatures, the influence of vibrations of different frequencies and amplitudes on the comfort of the snow groomer and the fatigue life of the rubber suspension system, and the life evaluation of the rubber suspension system under actual load conditions including road surface undulation factors.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to a test bench for testing a low-temperature rubber suspension system of a snow groomer. Background Art

[0002] The rubber suspension system of a snowplow is a crucial structure that elastically connects the vehicle's body and tracks. It consists of four components: a shock absorber shaft, a crank arm, a swing beam, and a roadwheel assembly. When the snowplow is operating, uneven terrain and road surface conditions can cause vibrations in the vehicle's body, affecting the vehicle's handling stability and grooming quality. Research into the stiffness, transmissibility, and service life of the rubber suspension system is crucial for further localization of snowplows.

[0003] The inventor of this application discovered that the existing suspension test bench cannot meet the performance test of the snow groomer rubber suspension system during the test process, and thus proposed this application. Summary of the Invention

[0004] In response to the problems mentioned in the background technology, the purpose of the present invention is to provide a snow groomer low-temperature rubber suspension system test bench to solve the problem that the existing suspension test bench cannot meet the performance test of the snow groomer rubber suspension system involved during the test process.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] The top end face of described sliding panel also is provided with an end face, and the sliding panel also is provided with an end face. The sliding panel also is provided with an end face. The sliding panel also is provided with an end face. The sliding panel also is provided with an end face. A first loading platform and a second loading platform are fixedly installed, a first actuator is provided at the bottom of the first loading platform, a second actuator is installed at the bottom of the second loading platform, a first force sensor is fixedly installed on the top of the first loading platform, and a second force sensor is fixedly installed on the top of the second loading platform, the upper end of the column is slidably connected to the sliding platform, the top of the sliding column is connected to the sliding platform, linear bearings are provided on both sides of the top of the sliding platform, the upper end of the linear bearing is connected to the first group of cross beams, an angle sensor is provided on the front of the sliding platform, a bottom plate is provided at the bottom of the sliding platform, a temperature control box is fixedly installed on the top of the bottom plate, a shock absorber shaft is provided on the inner side of the temperature control box, the front of the shock absorber shaft is rotatably connected to a crank arm, the front of the crank arm is rotatably connected to a swing beam, both ends of the front of the swing beam are rotatably connected to a road wheel group, a second displacement sensor and a third displacement sensor are provided on the outer sides of the first actuator and the second actuator respectively.

[0007] Furthermore, as a preferred technical solution, a counterweight limiting rod is fixedly installed on the top right side of the weight placement platform, and the counterweight is sleeved on the outer surface of the counterweight limiting rod.

[0008] Furthermore, as an optimal technical solution, a rubber pad is provided on the inner side of the limiting groove, and the top of the rubber pad is fitted and connected to the bottom of the weight placement platform.

[0009] Furthermore, as an optimal technical solution, a rubber gasket is provided at the bottom of the sliding column.

[0010] Furthermore, as an optimal technical solution, reinforcement plates are fixedly installed at the four corners of the bottom of the column, and the side shapes of the reinforcement plates at the bottom of the column are all set to be right-angled trapezoids.

[0011] Furthermore, as a preferred technical solution, the columns and the weight placement platform are both configured as hollow stainless steel cylinders, and the cross-sectional shapes of the columns and the placement platform are both square.

[0012] Furthermore, as a preferred technical solution, the top right side of the weight placement platform is T-shaped when viewed from above, and box covers are provided on both sides of the front of the temperature control box.

[0013] In summary, the present invention mainly has the following beneficial effects:

[0014] First, the present invention has temperature control capabilities. By adjusting the temperature of the temperature control box, it is possible to control the test conditions of key components of the rubber suspension system, especially to simulate the low-temperature environment of a ski resort. The present invention can simulate road surfaces with different undulations, ensuring that the loaded excitation is as close to actual working conditions as possible. The present invention can test the mechanical properties of the rubber suspension system under both dynamic and static conditions, and can also perform fatigue testing of the rubber suspension system.

[0015] Second, this test bench can study the static and dynamic mechanical properties of rubber suspension systems at different temperatures, the impact of vibrations of different frequencies and amplitudes on snow groomer comfort and the fatigue life of rubber suspension systems, and evaluate the life of rubber suspension systems under actual load conditions that include road surface undulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an axonometric drawing of the present invention;

[0017] Figure 2 This is a sliding axonometric drawing of the test bench of the present invention;

[0018] Figure 3 is an axonometric view of the suspension system of the present invention;

[0019] Figure 4 It is a front view of the loading device of the present invention.

[0020] Figure numerals: 1. roller; 2. force adding column; 3. counterweight limit rod; 4. counterweight weight; 5. weight placement platform; 6. sliding column; 7. rubber gasket; 8. second set of cross beams; 9. column; 10. first force sensor; 11. base; 12. second set of guides; 13. third displacement sensor; 14. pin; 15. first set of cross beams; 16. first displacement sensor; 17. linear bearing; 18. sliding platform; 19. pendulum beam; 20. angle sensor; 21. road wheel group; 22. second force sensor; 23. first loading platform; 24. first actuator; 25. second displacement sensor; 26. first set of guides; 27. second loading platform; 28. second actuator; 29. ​​limit groove; 30. rubber pad; 31. temperature control box; 32. box cover; 33. bottom plate; 34. shock absorber shaft; 35. crank arm. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] refer to Figure 1-4The test bench for the low-temperature rubber suspension system of a snow groomer described in this embodiment includes a base 11, a column 9 is fixedly installed on the top of the base 11, a first group of cross beams 15 is provided on the inner side of the column 9, a second group of cross beams 8 is provided on the inner side of the column 9 at the bottom of the first group of cross beams 15, a first displacement sensor 16 is fixedly installed in the middle of the top of the first group of cross beams 15, a sliding column 6 is fixedly installed on the top of the second group of cross beams 8, a force post 2 is provided on the upper end of the column 9, a pin 14 is hinged on the left side of the top of the column 9, and the left side of the top of the column 9 is hinged. The pin 14 is hinged with a weight placement platform 5, and a limit groove 29 is provided between the top right side of the base 11. The left bottom of the weight placement platform 5 is inserted into the inner side of the limit groove 29. A counterweight 4 is placed on the top right side of the weight placement platform 5. The bottom of the weight placement platform 5 is rotatably connected to the roller 1, and the roller 1 is set on the top of the force column 2. The first group of guides 26 and the second group of guides 12 are fixedly installed on both sides of the top front end of the base 11. The tops of the first group of guides 26 and the second group of guides 12 are fixedly installed respectively. The first loading platform 23 and the second loading platform 27 are provided with a first actuator 24 at the bottom of the first loading platform 23, and a second actuator 28 is installed at the bottom of the second loading platform 27. The first force sensor 10 is fixedly installed on the top of the first loading platform 23, and the second force sensor 22 is fixedly installed on the top of the second loading platform 27. The upper end of the column 9 is slidably connected to the sliding platform 18, and the top of the sliding column 6 is connected to the sliding platform 18. Linear bearings 17 are provided on both sides of the top of the sliding platform 18. The upper end of the linear bearing 17 is connected to the first loading platform 23. A group of cross beams 15 are connected, an angle sensor 20 is provided on the front of the sliding platform 18, a base plate 33 is provided at the bottom of the sliding platform 18, a temperature control box 31 is fixedly installed on the top of the base plate 33, a shock absorber shaft 34 is provided on the inner side of the temperature control box 31, the front of the shock absorber shaft 34 is rotatably connected to a crank arm 35, the front of the crank arm 35 is rotatably connected to a swing beam 19, both ends of the front of the swing beam 19 are rotatably connected to a road wheel group 21, and a second displacement sensor 25 and a third displacement sensor 13 are respectively provided on the outside of the first actuator 24 and the second actuator 28.

[0024] Example 2

[0025] refer to Figure 1-4 On the basis of Example 1, in order to achieve the purpose of improving the stability of weight placement, this embodiment has made an innovative design for the weight placement platform 5. Specifically, a counterweight limiting rod 3 is fixedly installed on the top right side of the weight placement platform 5, and the counterweight 4 is sleeved on the outer surface of the counterweight limiting rod 3; by setting the counterweight limiting rod 3, the counterweight 4 can be assisted in limiting its position and improving its stability.

[0026] refer to Figure 1-4In order to achieve the purpose of buffering, a rubber pad 30 is provided on the inner side of the limit groove 29 of this embodiment. The top of the rubber pad 30 is fitly connected to the bottom of the weight placement platform 5, and a rubber gasket 7 is provided at the bottom of the sliding column 6. By providing the rubber pad 30 and the rubber gasket 7, the weight placement platform 5 can be assisted in buffering, which is convenient for use.

[0027] Example 3

[0028] refer to Figure 1-4 Based on Example 2, this embodiment has an innovative design for the column 9 in order to achieve the purpose of improving stability. Specifically, reinforcement plates are fixedly installed at the four corners of the bottom of the column 9, and the side shapes of the reinforcement plates at the bottom of the column 9 are all set to be right-angled trapezoids. The reinforcement plates at the bottom of the column 9 can assist in reinforcing the column 9 as a whole and improve its supporting stability.

[0029] refer to Figure 1-4 In order to achieve the purpose of improving the stability of the column 9 and the weight placement platform 5, the column 9 and the weight placement platform 5 of this embodiment are both set as hollow stainless steel cylinders, and the cross-sectional shapes of the column 9 and the placement platform are both square; by setting up a hollow stainless steel cylinder, the overall service life of the weight placement platform 5 and the column 9 can be improved.

[0030] refer to Figure 1-4 In order to facilitate the placement of the counterweight 4, the top right side of the weight placement platform 5 of this embodiment is T-shaped when viewed from above, and box covers 32 are provided on both sides of the front of the temperature control box 31; the weight placement platform 5 with a T-shaped top view is provided, so that the right side area of ​​the weight placement platform 5 is larger, which is convenient for placing weights.

[0031] Principle and advantages of use: During use, linear bearings 17 are installed around the sliding platform 18, and the linear bearings 17 are mounted on the sliding column 6. A first displacement sensor 16 is installed between the sliding platform 18 and the first set of crossbeams 15. The first displacement sensor 16 is mainly used to measure the vibration data of the sliding platform 18;

[0032] The temperature control box 31 is installed under the sliding platform 18 and is connected to an external air conditioning system. It has a temperature control function. The bottom plate 33 at the opening of the temperature control box 31 is provided with a slide groove. A set of slidable box covers 32 are installed in the slide groove. The joint of the box covers 32 is provided with a circular hole to meet the connection shaft between the shock absorber shaft 34 and the crank arm 35.

[0033] The shock absorber shaft 34 is fixed below the sliding platform 18 and is located in the temperature control box 31. One end of the shock absorber shaft 34 passes through the circular hole provided in the cover 32 of the temperature control box 31. A rubber temperature sensor is provided on the rubber body of the shock absorber shaft 34. An angle sensor 20 is installed between the crank arms 35 of the rubber suspension system.

[0034] One end of the weight placement platform 5 is connected to the bracket by a pin 14, and the other end is placed in the bracket limit groove 29. A rubber pad 30 is provided in the limit groove 29. The limit groove 29 mainly plays a protective role during the vibration of the counterweight device.

[0035] The roller 1 can roll on the upper surface of the force-added column 2, which is installed above the sliding platform 18. The roller 1 mechanism can ensure that the counterweight device always transmits the load to the sliding device during the up and down vibration of the suspension system and the sliding platform 18;

[0036] The first actuator 24 and the second actuator 28 are respectively connected in parallel with the second displacement sensor 25 and the third displacement sensor 13. The first actuator 24 and the second actuator 28 can move independently, so that the first loading platform 23 and the second loading platform 27 can apply loads to the suspension system in different ways, thereby simulating road undulations.

[0037] During the static characteristics test, the temperature of the temperature control box 31 is set to T and left to stand for 72 hours. A counterweight 4 with a mass of m is placed on the weight placement table. At this time, the converted mass acting on the rubber suspension system is m'. The first loading platform 23 and the second loading platform 27 are set to load at the same rate. After two pre-loading tests, the vertical loading speed is set to meet 2-3kN / s and a third test is performed. At this time, the vertical displacement x, y of the suspension system can be obtained by the first displacement sensor 16. The rotation angle of the rubber suspension system crank arm 35 is φ by the angle sensor 20. The load-displacement angle curve is plotted to obtain the vertical static stiffness of the rubber suspension system and the torsional static stiffness of the shock absorber shaft 34 at temperature T.

[0038] During the dynamic characteristics test, the temperature of the temperature control box 31 is set to T and allowed to stand for 72 hours. A weight block with a weight of m is then placed on the weight placement platform 5. The first loading platform 23 and the second loading platform 27 are set to load at the same rate. After two pre-loading tests, the first actuator 24 and the second actuator 28 are set to perform 1000 cycles of loading with a periodic excitation of frequency f and amplitude a. At this time, the vertical displacement x of the suspension system can be obtained by the first displacement sensor 16, and the rotation angle φ of the rubber suspension system crank arm 35 is obtained by the angle sensor 20. The load-displacement angle curve is drawn from the last 100 cycles of loading test data to obtain the vertical dynamic stiffness of the rubber suspension system and the torsional dynamic stiffness of the shock absorber shaft 34 at temperature T. The obtained load-displacement angle curve is compared with the loading excitation characteristic to obtain the hysteresis angle, transfer characteristic curve rate and other characteristics of the rubber suspension system.

[0039] During the fatigue life test, the temperature of the temperature control box 31 is set to T and maintained for 72 hours, and then a weight block with a weight of m is placed on the weight placement platform 5. The loading functions of the first actuator 24 and the second actuator 28 are set according to the load under the actual working conditions of the rubber suspension system. The rubber suspension system is subjected to a vibration loading test. During the loading process, the data of the first force sensor 10 and the angle sensor 20 are continuously collected and processed, and the change in their dynamic stiffness value is calculated and monitored using a computer program. The test is terminated when the dynamic stiffness loss reaches 30%, and the loading time and number of loading cycles at this time are recorded.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A test bench for testing the low-temperature rubber suspension system of a snow groomer, characterized by: The invention comprises a base (11), a column (9) is fixedly installed on the top of the base (11), a first group of beams (15) is provided on the inner side of the column (9), a second group of beams (8) is provided on the inner side of the column (9) at the bottom of the first group of beams (15), a first displacement sensor (16) is fixedly installed in the middle of the top of the first group of beams (15), a sliding column (6) is fixedly installed on the top of the second group of beams (8), a force-adding column (2) is provided on the upper end of the column (9), a pin shaft (14) is hinged on the left side of the top of the column (9), a weight placement platform (5) is hinged on the left side of the top of the column (9) through the pin shaft (14), and the A limiting groove (29) is provided between the top and right sides of the base (11), the left bottom of the weight placement platform (5) is plugged into the inner side of the limiting groove (29), a counterweight (4) is placed on the right side of the top of the weight placement platform (5), the bottom of the weight placement platform (5) is rotatably connected to a roller (1), and the roller (1) is arranged on the top of the force-adding column (2), and the first group of guides (26) and the second group of guides (12) are fixedly installed on both sides of the top front end of the base (11), and the first loading platform (23) and the second loading platform (23) are fixedly installed on the top of the first group of guides (26) and the second group of guides (12). The first loading platform (23) is provided with a first actuator (24) at the bottom, the second loading platform (27) is provided with a second actuator (28) at the bottom, the first loading platform (23) is fixedly provided with a first force sensor (10) at the top, the second loading platform (27) is fixedly provided with a second force sensor (22) at the top, the upper end of the column (9) is slidably connected to the sliding platform (18), the top of the sliding column (6) is connected to the sliding platform (18), both sides of the top of the sliding platform (18) are provided with linear bearings (17), the upper end of the linear bearing (17) is connected to the first group of beams (15), the An angle sensor (20) is provided on the front of the sliding platform (18), a base plate (33) is provided on the bottom of the sliding platform (18), a temperature control box (31) is fixedly installed on the top of the base plate (33), a shock absorber shaft (34) is provided on the inner side of the temperature control box (31), the front side of the shock absorber shaft (34) is rotatably connected to a crank arm (35), the front side of the crank arm (35) is rotatably connected to a swing beam (19), both ends of the front side of the swing beam (19) are rotatably connected to a road wheel group (21), a second displacement sensor (25) is provided on the outer side of the first actuator (24), and a third displacement sensor (13) is provided on the outer side of the second actuator (28).

2. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: A counterweight limiting rod (3) is fixedly installed on the right side of the top of the weight placement platform (5), and the counterweight (4) is sleeved on the outer surface of the counterweight limiting rod (3).

3. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: A rubber pad (30) is provided on the inner side of the limiting groove (29), and the top of the rubber pad (30) is fitted and connected to the bottom of the weight placement platform (5).

4. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: A rubber washer (7) is provided at the bottom of the sliding column (6).

5. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: Reinforcement plates are fixedly installed at the four corners of the bottom of the column (9), and the side shapes of the reinforcement plates at the bottom of the column (9) are all set to be right-angled trapezoids.

6. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: The upright post (9) and the weight placement platform (5) are both configured as hollow stainless steel cylinders, and the cross-sectional shapes of the upright post (9) and the placement platform are both square.

7. The snow groomer low-temperature rubber suspension system test bench according to claim 1 is characterized by: The top right side of the weight placement platform (5) is T-shaped when viewed from above, and box covers (32) are provided on both sides of the front of the temperature control box (31).

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