CN118776922A - A tractor braking performance detection device - Google Patents

Abstract

The present invention is used in the technical field of tractor brake testing, and discloses a tractor brake performance detection device, including a test base, a test vehicle is placed inside the test base, wheels are installed on both sides of the test vehicle, and a sliding limit rod is installed on the outer surface of the test base. The tractor brake performance detection device adopts a method of arranging a rotatable and switchable contact roller inside the test base, so that the contact roller can contact the wheels through planes with different roughness after the test vehicle reaches a certain speed, so as to achieve the purpose of testing under different road conditions, and at the same time ensure the consistency of external environmental variables, adopt a method of driving the test vehicle to move close to the ground by a driving mechanism, and provide a working method in which the test vehicle always keeps a braking state for testing, thereby reducing the test result error caused by different braking reaction times during the test process, and ensuring the consistency of factors affecting the test process.

Description

A tractor braking performance detection device

Technical Field

The invention relates to the technical field of tractor brake testing, in particular to a tractor brake performance detection device.

Background Art

The braking performance test of the tractor is a necessary step to determine its driving safety performance. The braking performance test generally needs to be carried out on a test site, mainly by simulating real road conditions for measurement. During the measurement process, it is necessary to pay attention to indicators such as braking force balance, parking brake force and braking distance during braking. Poor operation of the tractor brake will affect the driving safety of the vehicle. Braking force test is an important method to test the performance of the braking system. It is usually divided into two steps: static braking force test and dynamic braking force test. The static braking force test is carried out when the vehicle is not moving. Park the vehicle on a level ground and tighten the parking brake firmly. Then use a suitable scale to measure the travel of the brake rod 30cm above the ground on the tire and record it. On this basis, the brake lever is braked with the prescribed force, and the stroke of the brake lever is measured again, and the actual braking distance is recorded. Finally, the braking coefficient is calculated and compared with the standard. The dynamic braking force test is carried out when the vehicle is driving. A road section with a suitable length and slope is selected, the vehicle is driven to a certain speed, the brake is suddenly stepped on to the bottom, and the braking distance is measured. Finally, the braking efficiency is calculated and compared with the standard. In order to ensure the comprehensiveness of the test results during the test, it is usually necessary to transport the tractor to be tested to different sites for testing under different road conditions. However, this will bring about the problem of inconsistent external conditions such as temperature and humidity in different test sites. At this time, the measured results are affected by the external environment and there is a certain error.

Summary of the invention

The object of the present invention is to provide a tractor braking performance detection device to solve the problem in the background technology mentioned above that different external environments may affect the results of tractor braking tests and make them inaccurate.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tractor braking performance detection device, comprising a test base, a test vehicle is placed inside the test base, and wheels are installed on both sides of the test vehicle, a contact roller is arranged inside the test base, an adjustment rod is fixedly connected to one end of the contact roller, and one end of the adjustment rod passes through the outer surface of the test base, a limit hole is provided on the side surface of the adjustment rod, and a sliding limit rod is installed on the outer surface of the test base.

Preferably, the contact roller is a cylinder with a plane on the side surface, and the upward plane of the contact roller is flush with the outer surface of the test base, and the arc-shaped outer surface of the contact roller fits with the inner side surface of the test base, and the roughness of each plane on the surface of the contact roller is different. A cross-shaped protrusion is fixedly provided on the side surface of one end of the adjusting rod located outside the test base, the limiting hole is in a cross shape and passes through the outer surface of the adjusting rod, and the adjusting rod is installed by engaging with the limiting rod through the limiting hole, and the limiting rod is an L-shaped design with a lateral protrusion provided on one end.

By adopting the above technical solution, the adjustment rod can switch the plane of the upward contact roller surface, so that the wheel can contact the contact roller surfaces with different roughness to achieve testing under different conditions.

Preferably, a driving mechanism is provided inside the side surface of the test base, and the driving mechanism is used to drive the test vehicle to move and separate from the test vehicle after reaching the speed.

By adopting the above technical solution, the test vehicle will not be affected by external forces during braking.

Preferably, the driving mechanism includes: a driving motor, which is fixedly mounted on the side surface of the test base, and one end of the output shaft of the driving motor passes through the inner surface of the test base, and one end of the output shaft of the driving motor is fixedly connected to the take-up wheel, a guide plate is fixedly arranged inside the side surface of the test base, and a sliding sliding rod is installed inside the guide plate, a rotating connecting ring is installed on the outer surface of the sliding rod, and the connecting ring and the take-up wheel are fixedly connected by a connecting chain, a sliding telescopic rod is installed at one end of the sliding rod, and one end of the telescopic rod is rotatably connected to a contact rod, and a connecting disk is fixedly connected to the end of the contact rod facing the wheel, a connecting nut is clamped and installed on the side surface of the connecting disk, and a clearance groove is provided on the outer surface of the test base facing the test vehicle.

By adopting the above technical solution, when the contact rod moves to the clearance groove, it can be driven to slide under the clearance effect of the clearance groove.

Preferably, the driving mechanism also includes: a linkage rod, which is fixedly arranged on the lower surface of the sliding rod, and a supporting plate is arranged on the upper surface of the test base below the wheel, and the side surface of the supporting plate is penetrated by the insertion rod, and one end of the insertion rod penetrates the outer surface of the linkage rod.

By adopting the above technical solution, the supporting plate can be easily replaced.

Preferably, a sliding marking plate is installed on the upper side surface of the test base, a scale groove is opened on the upper end surface of the test base, and a protective plate is fixedly provided on one end of the test base.

By adopting the above technical solution, the protective plate can block the test vehicle with brake failure.

Preferably, a spring is connected between the sliding rod and the telescopic rod, a disc-shaped protrusion is fixedly provided at one end of the contact rod connected to the telescopic rod, the inner surface of the give way groove is square in design, and the diameter of the contact rod disc protrusion is smaller than the side length of the square inner surface of the give way groove.

By adopting the above technical solution, the contact rod can slide into the clearance groove under the pulling of the spring.

Preferably, the connecting plate and the connecting nut are slidably connected, and the connecting nut is threadedly connected to the suspension mounting bolt of the test vehicle.

By adopting the above technical solution, the connecting nut can be disengaged from the engagement installation with the connecting disk when the connecting disk slides.

Preferably, the linkage rod is L-shaped and is slidably connected to the insertion rod. An arc-shaped groove is provided on the upper surface of the support plate, and the support plate is mounted on the wheel through the arc-shaped groove, and the lower surface of the support plate is in contact with the outer surface of the test base.

By adopting the above technical solution, the supporting plate can drive the locked wheel to move on the upper surface of the test base.

Preferably, the marking plate is connected to the test base by sliding friction, and the upper surface of the marking plate is flush with the upper end surface of the test base, and the marking plate is located between the wheel and the fender.

By adopting the above technical solution, the marking plate can be pushed to mark the position where the wheel finally stops.

Compared with the prior art, the invention has the following beneficial effects: the tractor braking performance detection device:

1. A rotatable contact roller is set inside the test base, so that the contact roller can contact the wheel through planes with different roughness after the test vehicle reaches a certain speed, so as to achieve the purpose of testing under different road conditions and ensure the consistency of external environmental variables;

Furthermore, a driving mechanism is used to drive the test vehicle to move close to the ground, providing a working method in which the test vehicle is always kept in a braking state for testing, thereby reducing the test result error caused by different braking reaction times during the test process and ensuring the consistency of the influencing factors during the test process;

2. The nuts used to fix the wheels of the original test vehicle are replaced with connecting nuts, so that when the contact rod moves to the clearance groove and is pulled and slid by the spring, the connection between the connecting plate and the connecting nut can be automatically released, so that the test vehicle is no longer affected by external forces during braking, ensuring the accuracy of the test results;

3. An arc-shaped groove is provided on the surface of the support plate so that the support plate can always keep the test vehicle stable during its movement, and after the test vehicle reaches a predetermined speed, the support plate can quickly disengage from the wheel by stopping movement so that the wheel contacts the surface of the contact roller for braking performance testing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of the present invention;

FIG2 is a schematic diagram of a three-dimensional structure of a connection between a wheel and a supporting plate according to the present invention;

FIG3 is a schematic diagram of a three-dimensional structure of a connection between a test base and a contact roller according to the present invention;

FIG4 is a schematic diagram of a three-dimensional structure of a connection between a test base and a protective plate according to the present invention;

FIG5 is a schematic diagram of a three-dimensional structure of the connection between the adjusting rod, the limiting hole and the limiting rod of the present invention;

FIG6 is a schematic diagram of a three-dimensional structure of a connection between a drive motor and a take-up wheel according to the present invention;

FIG7 is a schematic diagram of a three-dimensional structure of a cross-section surface connecting a wheel and a connecting plate according to the present invention;

FIG8 is a schematic diagram of a three-dimensional structure of a cross-section surface connecting a sliding rod and a connecting ring according to the present invention;

FIG9 is a schematic diagram of a three-dimensional structure of a cross-section surface connecting a test base and a clearance groove of the present invention;

FIG. 10 is a schematic diagram of the three-dimensional structure of the connecting disk and the connecting nut of the present invention in a disassembled state.

In the figure: 1. test base; 2. test vehicle; 3. wheel; 4. contact roller; 5. adjustment rod; 6. limit hole; 7. limit rod; 8. drive motor; 9. take-up wheel; 10. guide plate; 11. sliding rod; 12. connecting ring; 13. telescopic rod; 14. contact rod; 15. connecting plate; 16. connecting nut; 17. linkage rod; 18. supporting plate; 19. clearance groove; 20. plug rod; 21. marking plate; 22. scale groove; 23. protective plate.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

Please refer to Figures 1 to 10. The present invention provides a technical solution: a tractor braking performance detection device, comprising: a test base 1, a test vehicle 2 is placed inside the test base 1, and wheels 3 are installed on both sides of the test vehicle 2, a contact roller 4 is arranged inside the test base 1, an adjusting rod 5 is fixedly connected to one end of the contact roller 4, and one end of the adjusting rod 5 passes through the outer surface of the test base 1, a limiting hole 6 is provided on the side surface of the adjusting rod 5, a sliding limiting rod 7 is installed on the outer surface of the test base 1, the contact roller 4 is a cylinder with a plane on the side surface, and the upward plane of the contact roller 4 is flush with the outer surface of the test base 1, and the arc-shaped outer surface of the contact roller 4 is in contact with the inner side surface of the test base 1, and the contact roller 4 is in contact with the inner side surface of the test base 1. The roughness of each plane on the surface of the roller 4 is different. A cross-shaped protrusion is fixedly provided on the side surface of one end of the adjusting rod 5 located outside the test base 1. The limiting hole 6 is in a cross shape and penetrates the outer surface of the adjusting rod 5. The adjusting rod 5 is installed by engaging with the limiting rod 7 through the limiting hole 6. The limiting rod 7 is an L-shaped design with a transverse protrusion at one end. Before the test, the limiting rod 7 is slid upward to make the limiting rod 7 disengaged from the engaging with the limiting hole 6. Then, the adjusting rod 5 is rotated by the cross-shaped protrusion on the side surface of one end of the adjusting rod 5 so that the contact roller 4 can rotate and be flush with the outer surface of the test base 1 upward through the planes with different roughness, so that the test vehicle 2 can make the wheel 3 contact with the contact roller 4 plane with different roughness to perform braking performance test;

A driving mechanism is arranged inside the side surface of the test base 1, and the driving mechanism is used to drive the test vehicle 2 to move and separate from the test vehicle 2 after reaching the speed. The driving mechanism includes: a driving motor 8, the driving motor 8 is fixedly mounted on the side surface of the test base 1, and one end of the output shaft of the driving motor 8 passes through the inner surface of the test base 1, and one end of the output shaft of the driving motor 8 is fixedly connected to a take-up wheel 9, a guide plate 10 is fixedly arranged inside the side surface of the test base 1, and a sliding slide rod 11 is installed inside the guide plate 10, and a rotating connecting ring 12 is installed on the outer surface of the sliding rod 11, and the connecting ring 12 is fixedly mounted on the outer surface of the sliding rod 11. The connecting ring 12 is fixedly connected to the take-up wheel 9 by a connecting chain, a sliding telescopic rod 13 is installed at one end of the sliding rod 11, and a contact rod 14 is rotatably connected to one end of the telescopic rod 13, and a connecting plate 15 is fixedly connected to the end of the contact rod 14 facing the wheel 3, and a connecting nut 16 is snap-fitted and installed on the side surface of the connecting plate 15. A clearance groove 19 is provided on the outer surface of the side of the test base 1 facing the test vehicle 2, a spring is connected between the sliding rod 11 and the telescopic rod 13, a disc-shaped protrusion is fixedly provided on the end where the contact rod 14 is connected to the telescopic rod 13, and the inner surface of the clearance groove 19 is square in design, so that the contact rod 14 can be connected to the test vehicle 2. The diameter of the protrusion of the disc of the contact rod 14 is smaller than the side length of the square inner surface of the clearance groove 19, the connecting disc 15 and the connecting nut 16 are slidably connected, and the connecting nut 16 is threadedly connected to the suspension mounting bolt of the test vehicle 2. When debugging and installing the test vehicle 2, the nut connecting the wheel 3 and the test vehicle 2 is removed, and then the connecting nut 16 is screwed in to fix the wheel 3 and the test vehicle 2. Then, the vehicle is pushed to the starting position and the connecting disc 15 is pulled to make the disc at one end of the contact rod 14 slide out of the clearance groove 19. At this time, the connecting disc 15 is slidably engaged with one end of the connecting nut 16, and then the test vehicle is pushed in the reverse direction. The vehicle 2 moves to the end of the test base 1 away from the protective plate 23, and then the driving motor 8 is started to pull the connecting ring 12 through the take-up wheel 9 so that the sliding rod 11 slides relative to the test base 1 inside the guide plate 10, and the connecting plate 15 is driven to move by the telescopic rod 13 and the contact rod 14 so that the test vehicle 2 is driven to move to a predetermined speed. At this time, when the contact rod 14 moves to the clearance groove 19, the telescopic rod 13 slides under the pull of the spring between the sliding rod 11, so that the connecting plate 15 is driven to disengage from the engagement with the connecting nut 16, so that the test vehicle 2 can perform a braking test without being affected by external forces;

The driving mechanism also includes: a linkage rod 17, which is fixedly arranged on the lower surface of the sliding rod 11, and a supporting plate 18 is arranged on the upper surface of the test base 1 below the wheel 3, and the side surface of the supporting plate 18 is penetrated by the insertion rod 20, and one end of the insertion rod 20 penetrates the outer surface of the linkage rod 17, the linkage rod 17 is L-shaped, and the linkage rod 17 is slidably connected to the insertion rod 20, and an arc-shaped groove is opened on the upper surface of the supporting plate 18, and the supporting plate 18 is mounted on the wheel 3 through the arc-shaped groove, and the lower surface of the supporting plate 18 is in contact with the outer surface of the test base 1 Fitting, during the installation of the test vehicle 2, the wheel 3 is separated from the ground by engaging with the groove on the upper surface of the support plate 18 and is not in direct contact with the ground. At this time, when the linkage rod 17 completes the synchronous sliding with the sliding rod 11, the test vehicle 2 drives the wheel 3 to disengage from the support plate 18 under the action of inertia, so that the wheel 3 falls on the surface of the contact roller 4 under the action of gravity, and the wheel 3 is limited by the brake that is locked in advance to perform a braking test. When testing vehicles of different models, the support plate 18 is replaced by pulling out the insertion rod 20 to disengage from the engagement with the linkage rod 17;

A sliding marking plate 21 is installed on the upper side surface of the test base 1, and a scale groove 22 is opened on the upper end surface of the test base 1, and a protective plate 23 is fixedly arranged at one end of the test base 1, the marking plate 21 and the test base 1 are connected by sliding friction, and the upper surface of the marking plate 21 is flush with the upper end surface of the test base 1, and the marking plate 21 is located between the wheel 3 and the protective plate 23. During the test process, as the wheel 3 moves, the wheel 3 pushes the marking plate 21 to slide relative to the test base 1, and the final test result is determined by reading the value of the position where the wheel 3 pushes the marking plate 21 to stop and comparing it with the scale groove 22. When the braking effect is not good, the test vehicle 2 is blocked by the protective plate 23 to prevent the test vehicle 2 from rushing out of the test base 1.

Claims (10)

1. A tractor braking performance testing device, comprising a test base (1), a test vehicle (2) is placed inside the test base (1), and wheels (3) are installed on both sides of the test vehicle (2), and a contact roller (4) is arranged inside the test base (1), characterized in that: one end of the contact roller (4) is fixedly connected to an adjustment rod (5), and one end of the adjustment rod (5) passes through the outer surface of the test base (1), a limit hole (6) is provided on the side surface of the adjustment rod (5), and a sliding limit rod (7) is installed on the outer surface of the test base (1). 2. A tractor braking performance testing device according to claim 1, characterized in that: the contact roller (4) is a cylinder with a plane on the side surface, and the upward plane of the contact roller (4) is flush with the outer surface of the test base (1), and the arc-shaped outer surface of the contact roller (4) is in contact with the inner side surface of the test base (1), and the roughness of each plane on the surface of the contact roller (4) is different, and the side surface of one end of the adjustment rod (5) located outside the test base (1) is fixedly provided with a cross-shaped protrusion, the limiting hole (6) is in a cross shape and penetrates the outer surface of the adjustment rod (5), and the adjustment rod (5) is installed by engaging with the limiting rod (7) through the limiting hole (6), and the limiting rod (7) is an L-shaped design with a transverse protrusion provided at one end. 3. A tractor braking performance testing device according to claim 1, characterized in that: a driving mechanism is arranged inside the side surface of the test base (1), and the driving mechanism is used to drive the test vehicle (2) to move and separate from the test vehicle (2) after reaching the speed. 4. A tractor braking performance testing device according to claim 3, characterized in that: the driving mechanism comprises: a driving motor (8), the driving motor (8) is fixedly mounted on the side surface of the test base (1), and one end of the output shaft of the driving motor (8) passes through the inner surface of the test base (1), and one end of the output shaft of the driving motor (8) is fixedly connected to a take-up wheel (9), a guide plate (10) is fixedly arranged inside the side surface of the test base (1), and a sliding rod (11) is installed inside the guide plate (10), and the sliding rod (11) is fixedly arranged ... A rotatable connecting ring (12) is installed on the outer surface of the test base (1), and the connecting ring (12) is fixedly connected to the take-up wheel (9) via a connecting chain; a sliding telescopic rod (13) is installed on one end of the sliding rod (11), and a contact rod (14) is rotatably connected to one end of the telescopic rod (13), and a connecting plate (15) is fixedly connected to one end of the contact rod (14) facing the wheel (3); a connecting nut (16) is mounted on the side surface of the connecting plate (15), and a clearance groove (19) is provided on the outer surface of the side of the test base (1) facing the test vehicle (2). 5. A tractor braking performance testing device according to claim 4, characterized in that: the driving mechanism further comprises: a linkage rod (17), the linkage rod (17) is fixedly arranged on the lower surface of the sliding rod (11), a supporting plate (18) is arranged on the upper surface of the test base (1) below the wheel (3), and the side surface of the supporting plate (18) is penetrated by the insertion rod (20), and one end of the insertion rod (20) penetrates the outer surface of the linkage rod (17). 6. A tractor braking performance testing device according to claim 1, characterized in that: a sliding marking plate (21) is installed on the upper side surface of the test base (1), a scale groove (22) is opened on the upper end surface of the test base (1), and a protective plate (23) is fixedly arranged at one end of the test base (1). 7. A tractor braking performance detection device according to claim 4, characterized in that: a spring is connected between the sliding rod (11) and the telescopic rod (13), a disc-shaped protrusion is fixedly provided on one end of the contact rod (14) connected to the telescopic rod (13), the inner surface of the clearance groove (19) is square in design, and the diameter of the disc protrusion of the contact rod (14) is smaller than the side length of the square inner surface of the clearance groove (19). 8. A tractor braking performance testing device according to claim 4, characterized in that the connecting plate (15) and the connecting nut (16) are slidably connected, and the connecting nut (16) is threadedly connected to the suspension mounting bolt of the test vehicle (2). 9. A tractor braking performance testing device according to claim 5, characterized in that: the linkage rod (17) is of L-shaped design, and the linkage rod (17) is slidably connected to the insertion rod (20), the upper surface of the support plate (18) is provided with an arc-shaped groove, and the support plate (18) is mounted on the wheel (3) through the arc-shaped groove, and the lower surface of the support plate (18) is in contact with the outer surface of the test base (1). 10. A tractor braking performance testing device according to claim 6, characterized in that: the marking plate (21) is connected to the test base (1) by sliding friction, and the upper surface of the marking plate (21) is flush with the upper end surface of the test base (1), and the marking plate (21) is located between the wheel (3) and the protective plate (23).