Counter-force type automobile brake inspection bench

Abstract

The utility model discloses a counter-force type automobile brake inspection bench which comprises a shell with two openings symmetrically formed in the top, brake detection mechanisms are installed at the positions, corresponding to the openings, in the shell, and supports are fixedly connected to the positions, located on the two sides of each opening, in the shell. The brake detection mechanism comprises a front roller and a rear roller which are located below the opening, the front roller and the rear roller are rotationally connected with the support through bearing seats, and two gear motors are fixed in the shell; the encoder installed on the installation frame is used for monitoring rotation of the third roller, the rotation speed of the third roller can be accurately obtained, and therefore the linear speed of the wheel is obtained, the slip rate of the wheel is conveniently calculated, after the maximum value of braking force of the wheel is measured, the gear motor can be controlled to stop, and the braking force of the wheel can be accurately measured. And the brake mechanism is started to brake the front roller and the rear roller, so that abrasion to wheels is greatly reduced, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a relatively large range, in particular to a reaction force type automobile brake testing platform. Background Art

[0002] At present, the number of cars in my country is increasing. Braking is a key factor in car safety, and the detection of car braking has also become an important project. The current equipment for detecting car braking is a brake stand, which mainly drives the wheel to rotate through a roller, and uses the slip difference between the wheel and the roller when the wheel is braked to detect the braking force.

[0003] In order to obtain a large braking force without causing abnormal wear of the tire, the working state of the brake platform is generally controlled by the change of the slip rate. The core of the slip rate monitoring is the linear speed of the wheel, which is implemented through the third roller. At present, the most common method on the market is to punch holes or add gears on the third roller, and obtain the linear speed of the three rollers through frequency counting, which is also the linear speed of the wheel.

[0004] However, since the number of holes in each circle of the speed measuring roller (the third roller) is too small, the speed measurement error is very large. If the error is large, the shutdown cannot be controlled by the slip rate. Even if the shutdown is forced by the slip rate, the effect is poor. Either the shutdown is too early, the maximum braking force test is inaccurate, and it is easy to determine that the vehicle braking is unqualified; or the shutdown is too late, causing tire wear.

[0005] In order to solve the above problems, we propose a reaction-force automobile brake test bench. Utility Model Content

[0006] The utility model aims to provide a reaction force type automobile brake test bench to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A reaction type vehicle braking test bench, comprising a housing with two symmetrically arranged openings at the top. A braking detection mechanism is installed at the corresponding position of each opening in the housing. On both sides of each opening in the housing, there are fixed brackets. The braking detection mechanism includes a front roller and a rear roller located below the opening. Both the front roller and the rear roller are rotatably connected to the brackets through bearing seats. There are two reduction motors fixed in the housing, and the output shafts of the reduction motors are fixedly connected to the corresponding rear rollers. An installation frame is arranged between the front roller and the rear roller. A third roller is rotatably connected to the installation frame through a bearing seat. Both ends of the installation frame are connected to the corresponding brackets. An encoder is fixedly connected to the installation frame, and the encoder is传动 connected to one end of the third roller through an elastic coupling. The braking detection mechanism further includes a braking mechanism, and the braking mechanism is used to brake the rotating front roller and rear roller.

[0009] As a further solution of the present invention: Both outer walls of both ends of the installation frame are fixedly connected with connecting shafts. The connecting shafts are rotatably connected to the corresponding brackets through bearing seats. Gas springs are hinged on the outer walls of the brackets facing the installation frame. The push rod ends of the gas springs are hinged to the installation frame through fork heads.

[0010] As a further solution of the present invention: The braking mechanism includes a flat plate connected to the housing through a lifting mechanism. A braking beam is fixedly connected to the bottom of the flat plate. Brake shoes are installed at both ends of the braking beam. The brake shoes are located below the corresponding front roller and rear roller. Brake pads are installed on the outer walls of the brake shoes.

[0011] As a further solution of the present invention: The lifting mechanism includes two lifting air bags installed on the inner wall of the bottom of the housing. The tops of the lifting air bags are fixedly connected to the bottom of the flat plate, and the braking beam is located between the two lifting air bags. A U-shaped frame is fixedly connected to the housing at the corresponding position of each braking mechanism. The lifting air bags and the flat plate are both located inside the corresponding U-shaped frame, and a plurality of disc springs are arranged between the top of the flat plate and the inner wall of the U-shaped frame.

[0012] As a further solution of the present invention: A plurality of guide rods are slidably penetrated through the top of the U-shaped frame. The bottom ends of the guide rods are fixedly connected to the top of the flat plate, and the disc springs are sleeved on the corresponding guide rods.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model utilizes an encoder installed on a mounting frame to monitor the rotation of the third roller, and can accurately obtain the rotation speed of the third roller, thereby obtaining the linear speed of the wheel, so as to calculate the slip rate of the wheel. When the maximum value of the braking force of the wheel is measured, the reduction motor can be controlled to stop, and the brake mechanism can be started to brake the front roller and the rear roller, thereby greatly reducing the wear on the wheel and achieving good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a structural schematic diagram of a reaction-force automobile brake test bench.

[0016] Figure 2 The figure is a schematic diagram of the internal structure of a shell in a reaction-force automobile brake test bench.

[0017] Figure 3 The figure is a schematic diagram of the structure of a gas spring in a reaction-force automobile brake test bench.

[0018] Figure 4 The present invention is a structural schematic diagram of a brake mechanism in a reaction-force type automobile brake test bench.

[0019] Figure 5 The present invention is a structural schematic diagram of a cam frame in a reaction-force automobile brake test bench.

[0020] Among them, the shell 1, the opening 2, the bracket 3, the front roller 4, the rear roller 5, the mounting frame 6, the third roller 7, the connecting shaft 8, the encoder 9, the elastic coupling 10, the gas spring 11, the lifting airbag 12, the flat plate 13, the brake beam 14, the brake shoe 15, the brake pad 16, the cam frame 17, the disc spring 18, the guide rod 19, the wheel 20, and the reduction motor 21. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0025] See also Figures 1 to 5 In the embodiment of the utility model, a reaction-force automobile brake test bench comprises a shell 1 symmetrically provided with two openings 2 on the top, a brake detection mechanism is installed at the corresponding positions of the openings 2 in the shell 1, a bracket 3 is fixedly connected to both sides of each opening 2 in the shell 1, the brake detection mechanism comprises a front roller 4 and a rear roller 5 located below the opening 2, the front roller 4 and the rear roller 5 are rotatably connected to the bracket 3 through a bearing seat, two reduction motors 21 are fixed in the shell 1, the output shaft of the reduction motor 21 is fixedly connected to the corresponding rear roller 5, a mounting frame 6 is arranged between the front roller 4 and the rear roller 5, a third roller 7 is rotatably connected to the mounting frame 6 through a bearing seat, both ends of the mounting frame 6 are connected to the corresponding bracket 3, an encoder 9 is fixedly connected to the mounting frame 6, and the encoder 9 is transmission-connected to one end of the third roller 7 through an elastic coupling 10, and the brake detection mechanism also comprises a brake mechanism, which is used to stop the rotating front roller 4 and the rear roller 5.

[0026] The utility model adopts the above scheme, drives the vehicle to the housing 1, and makes the wheel 20 contact the corresponding front roller 4, rear roller 5 and third roller 7, then starts the reduction motor 21 to drive the rear roller 5 to rotate, so as to drive the vehicle wheel 20 to rotate, and then drives the front roller 4 and the third roller 7 to rotate. The encoder 9 installed on the mounting frame 6 is used to monitor the rotation of the third roller 7, so as to accurately obtain the rotation speed of the third roller 7, thereby obtaining the linear speed of the wheel 20, so as to calculate the slip rate of the wheel 20. When the slip rate exceeds 27%, the braking force of the wheel 20 is the maximum value. At this time, the reduction motor 21 can be controlled to stop, and the brake mechanism can be started to brake the front roller 4 and the rear roller 5 to greatly reduce the wear on the wheel 20.

[0027] Specific combination Figure 1-3In one embodiment of the utility model, the outer walls at both ends of the mounting frame 6 are fixedly connected with a connecting shaft 8, and the connecting shaft 8 is rotatably connected to the corresponding bracket 3 through a bearing seat. The outer wall of the bracket 3 facing the mounting frame 6 is hinged with a gas spring 11, and the push rod end of the gas spring 11 is hinged to the mounting frame 6 through a fork head.

[0028] By setting the gas spring 11, a thrust can be always applied to the mounting frame 6, so that the third roller 7 can fit tightly with the wheel 20, to ensure that the wheel 20 and the third roller 7 can effectively transmit, thereby ensuring the accuracy of the speed measurement of the wheel 20.

[0029] Specific combination Figure 4 and Figure 5 In one embodiment of the utility model, the brake mechanism includes a flat plate 13 connected to the shell 1 through a lifting mechanism, a brake beam 14 is fixedly connected to the bottom of the flat plate 13, brake shoes 15 are installed at both ends of the brake beam 14, the brake shoes 15 are located below the corresponding front roller 4 and rear roller 5, and brake pads 16 are installed on the outer wall of the brake shoes 15.

[0030] When the front roller 4 and the rear roller 5 need to be braked, the brake beam 14 is driven up by the lifting mechanism, which can drive the two brake shoes 15 to move upward, so that the front roller 4 and the rear roller 5 are in close contact with the corresponding brake pads 16 to achieve rapid braking of the front roller 4 and the rear roller 5.

[0031] Specific combination Figure 4-5 On the basis of the previous embodiment, further, the lifting mechanism includes two lifting airbags 12 installed on the bottom inner wall of the shell 1, the lifting airbags 12 are externally connected to a high-pressure air source, the tops of the lifting airbags 12 are fixedly connected to the bottom of the flat plate 13, and the brake beam 14 is located between the two lifting airbags 12, and the corresponding parts of the shell 1 and each brake mechanism are fixedly connected with a cam frame 17, the lifting airbags 12 and the flat plate 13 are located on the inner side of the corresponding cam frame 17, and a plurality of disc springs 18 are arranged between the top of the flat plate 13 and the inner wall of the cam frame 17.

[0032] By inflating the lifting airbag 12 with air through a high-pressure air source, the lifting airbag 12 can be expanded to push the brake beam 14 upward to realize automatic braking of the front roller 4 and the rear roller 5. When the lifting airbag 12 is deflated, the two brake shoes 15 can be driven to move downward. Through the setting of the disc spring 18, when the lifting airbag 12 is deflated, the flat plate 13 can be pushed to fall quickly. When the lifting airbag 12 is inflated, the rising stroke of the flat plate 13 can be limited, thereby avoiding excessive braking force on the front roller 4 and the rear roller 5.

[0033] Specific combination Figure 5In one embodiment of the utility model, a plurality of guide rods 19 are slidably provided on the top of the shaped frame 17 , the bottom ends of the guide rods 19 are fixedly connected to the top of the flat plate 13 , and the disc springs 18 are sleeved on the corresponding guide rods 19 .

[0034] The guide rod 19 can guide the lifting and lowering of the plate 13 on the cam frame 17, and can also guide the deformation of the disc spring 18, thereby preventing the disc spring 18 from jumping out from between the plate 13 and the cam frame 17 during the expansion and contraction deformation process.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reaction-force automobile brake test bench, characterized in that: The invention comprises a housing (1) with two openings (2) symmetrically formed on the top, wherein a brake detection mechanism is installed at positions corresponding to the openings (2) in the housing (1), and brackets (3) are fixedly connected on both sides of each opening (2) in the housing (1), wherein the brake detection mechanism comprises a front roller (4) and a rear roller (5) located below the openings (2), wherein the front roller (4) and the rear roller (5) are rotatably connected to the bracket (3) via a bearing seat, and wherein two reduction motors (21) are fixedly provided in the housing (1), and the output shaft of the reduction motor (21) is connected to the corresponding The front roller (4) and the rear roller (5) are fixedly connected, a mounting frame (6) is provided between the front roller (4) and the rear roller (5), a third roller (7) is rotatably connected to the mounting frame (6) via a bearing seat, both ends of the mounting frame (6) are connected to the corresponding bracket (3), an encoder (9) is fixedly connected to the mounting frame (6), and the encoder (9) is transmission-connected to one end of the third roller (7) via an elastic coupling (10), and the braking detection mechanism also includes a braking mechanism, which is used to stop the rotating front roller (4) and the rear roller (5).

2. The reaction-force automobile brake test bench according to claim 1, characterized in that: The outer walls at both ends of the mounting frame (6) are fixedly connected with connecting shafts (8), and the connecting shafts (8) are rotatably connected to the corresponding brackets (3) through bearing seats. The outer walls of the brackets (3) facing the mounting frame (6) are hinged with gas springs (11), and the push rod ends of the gas springs (11) are hinged with the mounting frame (6) through forks.

3. The reaction-force automobile brake test bench according to claim 1, characterized in that: The brake mechanism comprises a flat plate (13) connected to a housing (1) via a lifting mechanism, a brake beam (14) being fixedly connected to the bottom of the flat plate (13), brake shoes (15) being installed at both ends of the brake beam (14), the brake shoes (15) being located below the corresponding front roller (4) and rear roller (5), and brake pads (16) being installed on the outer walls of the brake shoes (15).

4. The reaction-force automobile brake test bench according to claim 3 is characterized in that: The lifting mechanism comprises two lifting airbags (12) mounted on the inner wall of the bottom of the shell (1), the tops of the lifting airbags (12) are fixedly connected to the bottom of the flat plate (13), and the brake beam (14) is located between the two lifting airbags (12). A cam frame (17) is fixedly connected to the corresponding position of each brake mechanism in the shell (1), the lifting airbags (12) and the flat plate (13) are located on the inner side of the corresponding cam frame (17), and a plurality of disc springs (18) are arranged between the top of the flat plate (13) and the inner wall of the cam frame (17).

5. The reaction-force automobile brake test bench according to claim 4 is characterized in that: A plurality of guide rods (19) are slidably provided on the top of the shaped frame (17), the bottom ends of the guide rods (19) are fixedly connected to the top of the flat plate (13), and the disc springs (18) are sleeved on the corresponding guide rods (19).

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