Third roller with buffering function and braking table

Abstract

The utility model relates to the field of automobile performance detection equipment, concretely relates to a third cylinder with buffering function and brake platform. A third cylinder with buffering function, including support, the front end connection third cylinder of support, the third cylinder is connected on the machine platform through the support, be equipped with horizontal buffer mechanism and longitudinal buffer mechanism on the third cylinder, the horizontal buffer mechanism sets up in the inside of third cylinder, longitudinal buffer mechanism sets up on the support. The utility model discloses brake platform is suitable for the detection use of multiple vehicle models, and the detection process wheel and third cylinder are in close contact, and the speed is accurate, and the design of brake force assembly and lifting beam improves the security of brake platform.

Description

Technical Field

[0001] This utility model relates to the field of automotive performance testing equipment, specifically to a third roller with a buffer function and a brake platform. Background Technology

[0002] Roller brake test benches measure wheel braking force by simulating the force state of a vehicle during braking. Some test benches are equipped with a third roller, whose rotational speed is monitored to determine the wheel slip ratio. Therefore, close contact between the third roller and the wheel of the vehicle under test is a necessary condition for accurate measurement. However, in existing systems, the third roller is directly fixed to the machine frame between the main roller and the auxiliary roller via a bracket. If the wheels of the vehicle under test are too large or too small, there may be gaps or excessive tightness in the contact between the third roller and the wheel, affecting the speed measurement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a third roller with a buffer function and its braking platform, which can achieve close contact between the third roller and various wheels and improve the speed measurement accuracy.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: A third roller with a buffer function includes a support frame, the front end of which is connected to the third roller. The third roller is connected to the machine base via the support frame. The third roller is provided with a transverse buffer mechanism and a longitudinal buffer mechanism. The transverse buffer mechanism is disposed inside the third roller, and the longitudinal buffer mechanism is disposed on the support frame.

[0005] Furthermore, the upper end of the support of the longitudinal buffer mechanism is connected to the third roller, the middle end of the support is axially connected to the machine base, and the rear end of the support is connected to the machine base through an elastic body; when an external force is applied to the third roller at the front end of the support, the front end of the support is pressed down, the front end and the rear end of the support rotate relative to the middle end of the support, and the elastic body pulls the rear end of the support.

[0006] Furthermore, the bracket is bent at an obtuse angle with its midpoint as the bending point, the front end of the bracket is higher than the midpoint of the bracket, and the midpoint of the bracket is higher than the rear end of the bracket.

[0007] Furthermore, the third roller has a speed measuring hole on its body, and the corresponding bracket has a speed measuring sensor.

[0008] Furthermore, the speed sensor is fixed to the bracket by a fixing rod parallel to the third roller; a limiting rod parallel to the third roller is provided on the machine base, and when the third roller is pressed down to the bottom, the fixing rod moves down and abuts against the limiting rod.

[0009] Furthermore, the transverse buffer mechanism is located inside the body of the third roller. The body of the third roller is a hollow cylinder. Both ends of the body are connected to the support shaft via bearings. A flange is provided between the bearing and the body. Both ends of the support shaft are connected to a bracket. A limiting circlip is provided on the support shaft inside the body. An elastic body B is fitted on the support shaft between the limiting circlip and a bearing.

[0010] A braking platform, comprising any of the third rollers described above.

[0011] Furthermore, a main roller is provided on the machine base in front of the third roller, and a secondary roller is provided on the machine base behind the third roller. The main roller is driven by a motor, and the secondary roller is connected to the main roller by a chain.

[0012] Furthermore, a lifting beam is provided on the machine platform between the third roller and the main roller. The upper limit of the lifting beam is level with the upper horizontal tangent height of the main roller, and the lower limit of the lifting beam is lower than the lower horizontal tangent height of the cylinder body when the third roller is pressed down.

[0013] Furthermore, the machine is equipped with a braking force assembly for emergency braking.

[0014] The advantages of this invention compared to existing technologies are as follows: This invention provides a third roller with a buffer function. Utilizing the swing of the support around a pivot and spring tension, the third roller automatically adapts to different wheels, ensuring close contact between the wheel and the third roller. Simultaneously, the buffer mechanism provides anti-slip protection; the spring preload must exceed the maximum frictional resistance to prevent speed measurement failure. It also improves impact resistance, as the spring buffers external impacts, protecting the speed sensor and bearings. This invention's brake platform is suitable for testing various vehicle models. During the testing process, the wheel maintains close contact with the third roller, ensuring accurate speed measurement. The design of the braking force assembly and lifting beam enhances the safety of the brake platform. Attached Figure Description

[0015] Figure 1 A schematic diagram of the third roller in this embodiment of the present invention; Figure 2 A cross-sectional view of the third roller in this embodiment of the present invention; Figure 3 A schematic diagram of the brake platform in standby state according to an embodiment of this utility model; Figure 4 A schematic diagram of the brake table detection status in an embodiment of this utility model; Figure 5 A schematic diagram of the braking platform according to an embodiment of this utility model.

[0016] Reference numerals in the attached drawings: 1. Support frame, 2. Third roller, 201. Roller body, 202. Bearing, 203. Support shaft, 204. Flange, 205. Limiting circlip, 206. Elastomer B, 3. Machine base, 4. Elastomer, 5. Speed ​​sensor, 6. Fixing rod, 7. Limiting rod, 8. Speed ​​measuring hole, 9. Main roller, 10. Auxiliary roller, 11. Motor, 12. Chain, 13. Lifting beam, 14. Braking assembly, 15. Wheel. Detailed Implementation

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. However, the embodiments are not intended to limit the present invention. Any similar structures and similar variations of the present invention should be included in the protection scope of the present invention.

[0018] like Figure 1 As shown, a third roller with a buffer function includes a support 1. The front end of the support 1 is connected to a third roller 2. The third roller 2 directly contacts and rubs against the wheel 15 of the vehicle being inspected, converting the wheel's motion into its own rotation. The third roller 2 is connected to the machine base 3 via the support 1. The third roller 2 is equipped with a lateral buffer mechanism and a longitudinal buffer mechanism. The lateral buffer mechanism is located inside the third roller, and the longitudinal buffer mechanism is located on the support 1. The lateral buffer mechanism and the longitudinal buffer mechanism provide a small lateral or longitudinal buffer space for the third roller, respectively, ensuring a tighter contact between the wheel and the third roller during operation.

[0019] The upper end of the support 1 of the longitudinal buffer mechanism is connected to the third roller 2. The middle end of the support 1 is axially connected to the machine base 3. The rear end of the support 1 is connected to the machine base 3 through an elastic body 4. The support 1 connects the third roller, the speed sensor, and the machine base 3. When an external force is applied to the third roller 2 at the front end of the support 1, the front end of the support 1 is pressed down slightly. The front end and the rear end of the support 1 rotate relative to the middle end of the support 1. The middle end of the support is connected to the machine base through a pin. A corresponding frame is provided on the machine base to allow the middle end of the support to be hinged to the machine base. The frame is designed so that the middle end of the support is higher than the lower end of the support and lower than the front end of the support, which facilitates the swing of the support around the middle end of the support. Using the middle end of the support as a fulcrum, the third roller is allowed to swing slightly around the support to adapt to the detection of wheels of different sizes. Specifically, the elastic body 3 pulls the rear end of the support 1. The elastic body 3 can be a spring. A spring pin is provided on the machine base corresponding to the spring as the force anchor point of the spring. The other end of the spring is connected to the lower end of the support through a spring pin or a hook. Elastomer 3 provides preload to ensure tight contact between the third roller and the wheel, guaranteeing slippage-free friction transmission. The spring preload used here must exceed the maximum frictional resistance between the wheel and the third roller to prevent speed measurement failure. Regarding the specific structure of the support, such as... Figure 1As shown, the bracket 1 is bent at an obtuse angle with the middle point as the bending point. The front end of the bracket 1 is higher than the middle end of the bracket 1, and the middle end of the bracket 1 is higher than the rear end of the bracket 1.

[0020] The third roller 2 has a speed measuring hole 8 on its body 201, and a speed sensor 5 is mounted on the corresponding support 1. The speed sensor 5 detects the rotational speed of the third roller through the Hall effect and outputs a pulse signal that is converted into speed. The speed sensor 5 is fixed on the support 1, and the probe of the speed sensor is aligned with the speed measuring holes 8 evenly distributed on the shaft end of the third roller. The probe maintains a precise gap (1-2mm) with the roller shaft. The speed sensor 5 and the speed measuring holes 8 are used to detect the wheel rotational speed.

[0021] To prevent the wheels from overloading, the speed sensor 5 is fixed to the bracket 1 by a fixing rod 6 parallel to the third roller 1; the machine base 3 is provided with a limiting rod 7 parallel to the third roller 1. When the third roller 1 is pressed down to the bottom, the fixing rod 6 moves down and abuts against the limiting rod 7.

[0022] like Figure 2 As shown, the transverse buffer mechanism is located inside the cylinder body 201 of the third roller 2. The cylinder body 201 directly contacts the wheel 15 to achieve rolling rotation. The cylinder body 201 of the third roller 1 is a hollow cylinder. Both ends of the cylinder body 201 are connected to the support shaft 203 via bearings 202. The support shaft 203 supports the cylinder body of the third roller, providing a basis for the rotation of the cylinder body. The bearings 202 are installed between the support shaft and the cylinder body of the third roller to reduce friction between the two, allowing the cylinder body to rotate smoothly around the support shaft. A flange 204 is provided between the bearing 202 and the cylinder body for easy installation and fixation of the entire roller assembly. Both ends of the support shaft 203 are connected to the bracket 1. A limiting spring 205 is provided on the support shaft 203 inside the cylinder body 201 to limit the axial movement of the bearings or other components, preventing displacement during operation and ensuring structural stability. An elastic body B206 is fitted on the support shaft 203 between the limiting snap ring 205 and a bearing 202 to provide elastic force, which may be used for buffering, adjusting pressure, or enabling the structure to reset after being subjected to external force.

[0023] The inner ring of the bearing and the support shaft are typically fitted with an interference fit to ensure the bearing is securely mounted on the support shaft. The outer ring of the bearing and the inner bore of the third drum body are fitted with an interference fit to allow the drum body to rotate with the bearing. The elastic element B206 is a spring, installed between the support shaft and the drum body or other fixed structures via a specific spring seat, utilizing its elastic deformation to provide the required force. The retaining circlip is generally installed in a retaining groove on the shaft, using its elastic deformation to lock into the groove and provide a limiting function. The flange usually has bolt holes, allowing for bolt connection to flanges of other equipment or structures, thus enabling the installation and fixation of the entire drum assembly.

[0024] like Figure 5 As shown, a braking platform includes the aforementioned third roller. A main roller 9 is mounted on a machine base 3 at the front of the third roller 2, and an auxiliary roller 10 is mounted on the machine base 3 at the rear of the third roller 2. The main roller 9 is driven by a motor 11, and the auxiliary roller 10 is connected to the main roller 9 via a chain 12. A lifting beam 13 is mounted on the machine base 3 between the third roller 2 and the main roller 9. The upper limit of the lifting beam 13's upward movement is level with the upper horizontal tangent height of the main roller 9, and the lower limit of the lifting beam 13's downward movement is lower than the lower horizontal tangent height of the cylinder body 201 when the third roller 2 is pressed down. The lifting beam 13 provides a safety feature for the braking platform; during operation, it pushes the wheels out or buffers the contact between the wheels and the third roller. Simultaneously, an emergency braking force assembly 14 is mounted on the machine base 3, improving the safety of the braking platform.

[0025] Workflow: such as Figure 3 As shown, this is the standby state, with the lifting beam and the third roller both in the upper position, and the elastic body 3 in the tightened state; as Figure 4 As shown, in the detection state, after the vehicle body enters, the lifting beam descends, and the third roller contacts wheel 15 for detection. The speed sensor reads the roller rotation speed and outputs a signal to the processing system to calculate the speed. During this process, the lateral buffer mechanism and the longitudinal buffer structure pull the third roller, making the roller body in close contact with the wheel. The bracket floats slightly around the pin shaft to adapt to unevenness or vibration.

[0026] In the specific implementation of this embodiment, the following aspects are involved: the driving method of the lifting beam, etc., are all existing technologies, such as the use of cylinders or other structures; the braking force assembly and data transmission technology are also existing technologies on site, so they are not described in detail here.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A third roller with a buffer function, comprising a support (1), the front end of which is connected to a third roller (2), the third roller (2) being connected to a machine base (3) via the support (1), characterized in that: The third roller (2) is provided with a transverse buffer mechanism and a longitudinal buffer mechanism. The transverse buffer mechanism is located inside the third roller, and the longitudinal buffer mechanism is located on the support (1).

2. The third roller with buffer function according to claim 1, characterized in that: The upper end of the support (1) of the longitudinal buffer mechanism is connected to the third roller (2), the middle end of the support (1) is axially connected to the machine base (3), and the rear end of the support (1) is connected to the machine base (3) through the elastic body (4). When an external force is applied to the third roller (2) at the front end of the support (1), the front end of the support (1) is pressed down, and the front end and the rear end of the support (1) rotate relative to the middle end of the support (1). The elastic body (4) pulls the rear end of the support (1).

3. A third roller with a buffer function according to claim 2, characterized in that: The bracket (1) is bent at an obtuse angle with the middle point as the bending point. The front end of the bracket (1) is higher than the middle end of the bracket (1), and the middle end of the bracket (1) is higher than the rear end of the bracket (1).

4. A third roller with a buffer function according to claim 3, characterized in that: The third roller (2) has a speed measuring hole (8) on its body (201), and the corresponding bracket (1) has a speed measuring sensor (5).

5. A third roller with a buffer function according to claim 4, characterized in that: The speed sensor (5) is fixed on the bracket (1) by a fixing rod (6) parallel to the third roller (2); the machine base (3) is provided with a limiting rod (7) parallel to the third roller (2), and when the third roller (2) is pressed down to the bottom, the fixing rod (6) moves down and abuts against the limiting rod (7).

6. A third roller with a buffer function according to claim 1, characterized in that: The transverse buffer mechanism is located inside the cylinder body (201) of the third roller (2). The cylinder body (201) of the third roller (2) is a hollow cylinder. The two ends of the cylinder body (201) are connected to the support shaft (203) through bearings (202). A flange (204) is provided between the bearing (202) and the cylinder body. The two ends of the support shaft (203) are connected to the bracket (1). A limiting snap ring (205) is provided on the support shaft (203) inside the cylinder body (201). An elastic body B (206) is sleeved on the support shaft (203) between the limiting snap ring (205) and a bearing (202).

7. A braking platform, characterized in that: Includes the third roller with buffer function as described in any one of claims 1-6 above.

8. A braking platform according to claim 7, characterized in that: The machine base (3) in front of the third roller (2) is provided with a main roller (9) and the machine base (3) behind the third roller (2) is provided with a secondary roller (10). The main roller (9) is driven by a motor (11) and the secondary roller (10) is connected to the main roller (9) by a chain (12).

9. A braking platform according to claim 8, characterized in that: A lifting beam (13) is provided on the machine platform (3) between the third roller (2) and the main roller (9). The upper limit of the lifting beam (13) is level with the upper horizontal tangent height of the main roller (9), and the lower limit of the lifting beam (13) is lower than the lower horizontal tangent height of the cylinder body (201) when the third roller (2) is pressed down.

10. A braking platform according to claim 7, characterized in that: The machine tool (3) is equipped with a braking force assembly (14) for emergency braking.

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