Hydraulic roller for driving vehicle to run at low speed

Abstract

The utility model relates to a hydraulic roller for driving a vehicle to run at a low speed, which comprises a fixing frame, a hydraulic system, a driving system and a roller mechanism, the hydraulic system and the driving system are both mounted on the fixing frame and are mounted on the vehicle by bolts through mounting holes reserved on the extension edge of the fixing frame, and the hydraulic system comprises a push-pull oil cylinder, a support rod and a rotating arm. The rolling wheel mechanism is composed of a driving motor for providing power and rolling wheels, the rolling wheels are connected with the driving motor through couplings, the rolling wheel mechanism can achieve the lifting function under the control of the hydraulic system, and during low-speed driving, a driver operates the hydraulic system to enable the push-pull oil cylinder to drive the rotating arm to rotate, and the rolling wheels make contact with the surfaces of vehicle tires; rotation power of the driving motor is transmitted to the idler wheels through the coupler to drive the vehicle to run at a low speed under the action of friction force, and the vehicle can run normally by controlling the hydraulic system to lift the idler wheel mechanism when operation is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle driving, in particular to a hydraulic roller for driving a vehicle to travel at a low speed. Background Art

[0002] Against the background of rapid development of urban roads, the convenience of vehicle traffic has been greatly increased. At the same time, the demand for work vehicles that can achieve low-speed precise control under special working conditions such as road construction and road rescue has also increased accordingly. Under the existing technology, low-speed driving of work vehicles is usually achieved by the driver's precise control of the low gear of the gearbox, modification of the drive system of existing vehicles, or use of special vehicles manufactured for low-speed work scenarios. The driver's operation cannot adapt to long-distance low-speed precise control. The application scenarios of modified vehicles and special vehicles manufactured for special scenarios are narrow and the cost of use is high, which cannot meet the needs of some special work scenarios. Therefore, a vehicle drive device that does not change the vehicle drive structure and can achieve long-distance precise control is needed. Utility Model Content

[0003] The utility model aims to provide a hydraulic roller for driving a vehicle to travel at a low speed, so as to solve the problems existing in the above-mentioned prior art.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A hydraulic roller for driving a vehicle to travel at a low speed comprises a fixed frame, a push-pull cylinder hingedly arranged on the fixed frame, and a rotating arm rotatably installed at the bottom end of the fixed frame, the rotating arm is symmetrically provided with bearing seats, a roller is rotatably installed on the rotating arm, both ends of the roller are inserted into the bearing seats, one end of the rotating arm is provided with a driving device, the driving device is used to drive the roller to move axially, one end of the push-pull cylinder is hingedly connected to the fixed frame, the other end of the push-pull cylinder is hingedly fixed to the rotating arm through a support rod, and the push-pull cylinder is used to control the rotation of the rotating arm relative to the fixed frame.

[0006] By adopting the above technical scheme, the hydraulic roller device is installed on the rear of the working vehicle, and is installed on the vehicle through the threaded holes reserved on the two edges of the reinforcing plate of the top structure of the fixed frame. The reinforcing plate is provided with a buffer layer to prevent the device from being damaged by impact during operation. The fixed frame is used to connect the various components of the hydraulic roller device and install it on the working vehicle. The top main body of the fixed frame has an opening, and one end of the push-pull cylinder is fixed by a hinge. A swivel arm that can rotate axially is installed under the fixed frame, and the end of the push-pull cylinder is hinged and fixed to the swivel arm. The push-pull cylinder can be extended and retracted under the control of the hydraulic system. After extending, it drives the swivel arm to rotate axially along the installation point of the swivel arm and the fixed frame.

[0007] In a further embodiment, the driving device includes a driving motor and a hydraulic circuit for controlling the rotation of the driving motor, and the output shaft of the driving motor is connected to the roller through a coupling.

[0008] In a further embodiment, the roller includes a roller shaft and a sleeve sleeved in the middle position of the roller shaft, the surface of the sleeve is provided with an anti-slip layer, the anti-slip layer is provided with anti-slip patterns, a plurality of protrusions are evenly arranged axially on the roller shaft, and grooves corresponding to the plurality of protrusions are provided in the sleeve, and the protrusions are transitionally matched with the grooves.

[0009] In a further embodiment, a pressure detector is provided at the connection between the push-pull oil cylinder and the rotating arm, and the pressure detector is used to detect the pressure applied by the push-pull oil cylinder to the rotating arm.

[0010] In a further embodiment, a structure reinforcement plate is disposed on the top of the fixing frame, and a buffer layer is disposed on the structure reinforcement plate, and the buffer layer is used to avoid a hard connection between the structure reinforcement plate and the installation object.

[0011] In a further embodiment, both ends of the fixing frame are provided with extensions, and threaded holes are provided on the extensions.

[0012] By adopting the above technical solution, after the hydraulic roller device is installed on the working vehicle, the driver operates the hydraulic system to start the roller device, and the push-pull cylinder is extended to make the roller installed on the rotating arm close to the surface of the working vehicle tire. The driving motor is started and the coupling transmits torque to the roller to drive the roller to rotate. The anti-skid layer of the roller surface sleeve is in close contact with the tire surface, and the friction force drives the wheel to rotate to achieve low-speed travel.

[0013] In summary, the utility model has the following beneficial effects:

[0014] 1. The hydraulic roller device is used to drive the working vehicle to travel at a low speed without changing the main structure of the vehicle. Compared with traditional low-speed working vehicles, the cost of special modification of the working vehicle drive system in some scenarios is optimized. The hydraulic roller drive system adopts an easy-to-operate design. The vehicle travel speed can be accurately adjusted through the hydraulic system according to the working scenario, and the original vehicle steering system can be used to achieve long-distance low-speed driving, which simplifies the device structure. When the low-speed driving operation is completed, the driver can raise the hydraulic roller by operating the control system without affecting the normal driving function of the vehicle;

[0015] 2. The hydraulic roller device is installed on the working vehicle using an easy-to-disassemble connection method. When a low-speed operation scenario is required, the hydraulic roller device is started to operate. When not in use, the hydraulic roller device can be quickly disassembled without affecting the normal transportation and carrying capacity of the truck, expanding the usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 A schematic diagram of a driving device for a hydraulic roller that drives a vehicle at a low speed, used to illustrate the connection relationship between various components;

[0018] In the figure, 1, fixed frame; 2, push-pull cylinder; 3, rotating arm; 4, driving device; 41, roller shaft; 42, sleeve; 43, coupling; 44, driving motor. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description of this specification, the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from a particular component geometry, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this specification, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] Embodiment 1:

[0022] like Figure 1-2As shown, a hydraulic roller for driving a vehicle to travel at a low speed comprises a fixed frame 1, a push-pull oil cylinder 2 hingedly arranged on the fixed frame 1, and a rotating arm 3 rotatably installed at the bottom end of the fixed frame 1, the rotating arm 3 is symmetrically provided with a bearing seat, a roller is rotatably installed on the rotating arm 3, both ends of the roller are penetrated in the bearing seat, one end of the rotating arm 3 is provided with a driving device 4, the driving device 4 is used to drive the roller to move axially, one end of the push-pull oil cylinder 2 is hingedly connected to the fixed frame 1, and the other end of the push-pull oil cylinder 2 is hingedly connected to the rotating arm 3 through a support rod. The push-pull oil cylinder 2 is used to control the rotation of the rotating arm 3 relative to the fixed frame 1. The driving device 4 includes a driving motor 44 and a hydraulic circuit for controlling the rotation of the driving motor 44. The output shaft of the driving motor 44 is connected to the roller through a coupling 43. The roller includes a roller shaft 41 and a sleeve 42 sleeved in the middle of the roller shaft 41. The surface of the sleeve 42 is provided with an anti-skid layer, and the anti-skid layer is provided with anti-skid patterns. The roller shaft 41 is evenly provided with a plurality of protrusions axially, and the sleeve 42 is provided with grooves corresponding to the plurality of protrusions. The protrusions are connected to the roller shaft 41 and the sleeve 42 is provided with grooves corresponding to the plurality of protrusions. The groove transition fits, and a pressure detector is provided at the connection between the push-pull cylinder 2 and the rotating arm 3. The pressure detector is used to detect the pressure applied by the push-pull cylinder 2 to the rotating arm 3. A structural reinforcement plate is provided at the top of the fixing frame 1, and a buffer layer is provided on the structural reinforcement plate. The buffer layer is used to avoid the hard connection between the structural reinforcement plate and the installation object. Both ends of the fixing frame 1 are provided with extensions, and threaded holes are provided on the extensions; the fixing frame 1 is used to install the hydraulic roller device to the working vehicle body, and provide support for the push-pull cylinder 2, the rotating arm 3 and the roller. After the device is started, it is necessary to transmit a large torque to the vehicle tire, so the fixing frame 1 is made of high-strength metal material; one end of the cylinder barrel of the push-pull cylinder 2 is fixed to the top of the fixing frame 1, and one end of the piston push rod is fixed to the mounting hole reserved for the rotating arm 3. The extension and retraction of the piston push rod is controlled by the hydraulic system to control the rotation of the rotating arm 3 to realize the retracting and lowering of the roller; the rotating arm 3 is used to fix the roller, and is fixed to the fixing frame 1 by a hinge. Under the action of the push-pull cylinder 2, it moves axially along the mounting hole of the fixing frame 1. The roller is installed in the bearing seat of the rotating arm 3, and can drive the vehicle to move under the rotation of the driving device 4.

[0023] like Figure 1-2As shown, the driving device 4 of the hydraulic roller device includes a roller shaft 41, a sleeve 42, a coupling 43 and a driving motor 44; the roller shaft 41 and the sleeve 42 cooperate with each other to form a roller, and the surface of the sleeve 42 is designed with an anti-skid layer with anti-skid patterns to increase the friction with the tire surface; one end of the coupling 43 is connected to the roller shaft 41, and the other end is connected to the output shaft of the driving motor 44. Since the rotational torque of the driving motor 44 is transmitted to the roller shaft 41, a sleeve coupling 43 with high two-axis concentricity and large transmission torque is selected; the driving motor 44 is connected to the hydraulic system through a hydraulic circuit, and the driver can adjust the speed of the driving motor 44 by adjusting the proportional valve of the hydraulic system.

[0024] Specific implementation process: When using a vehicle equipped with a hydraulic roller drive device for operation, the driver needs to put the vehicle in neutral gear, control the hydraulic system to lower the roller by operating the controller, and the hydraulic system extends the push-pull cylinder 2 through the hydraulic circuit. The rotating arm 3 connected to the end of the push-pull cylinder 2 rotates along the mounting hole of the fixing frame 1 until the roller contacts the tire surface. Since driving the vehicle requires the roller to transmit a large torque to the tire, an anti-skid layer is designed on the roller surface sleeve 42 to increase the friction between the tire surface and the roller. The surface texture of the anti-skid layer and the tire surface transmit the rotation of the drive motor 44 under the action of the pressure and friction generated by the extension of the push-pull cylinder 2 to make the vehicle move forward. A pressure detector is provided at the connection between the push-pull cylinder 2 and the rotating arm 3, and the pressure detector can detect The pressure generated between the roller and the tire is measured, so that the driver can adjust the extension length of the push-pull cylinder 2 to ensure that the roller can drive the vehicle normally. After the driver controls the push-pull cylinder 2 to extend so that the roller is in close contact with the tire, the hydraulic system can be operated to start the drive motor 44. The rotation speed of the drive motor 44 can be controlled by adjusting the proportional valve connected between the hydraulic system and the hydraulic circuit. The rotation of the drive motor 44 drives the coupling 43 and the roller connected to the other end of the coupling 43 to rotate. The vehicle tire rotates under the pressure generated by the extension of the push-pull cylinder 2 on the roller and the friction between the tire surface and the roller surface sleeve. The driver can adjust the vehicle's travel speed by operating the hydraulic system and use the vehicle steering wheel to control the travel direction to complete long-distance operations at a low speed.

[0025] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A hydraulic roller for driving a vehicle at a low speed, characterized in that: The invention comprises a fixed frame (1), a push-pull oil cylinder (2) hingedly arranged on the fixed frame (1), and a rotating arm (3) rotatably mounted at the bottom end of the fixed frame (1), the rotating arm (3) being symmetrically provided with bearing seats, a roller being rotatably mounted on the rotating arm (3), both ends of the roller being inserted into the bearing seats, a driving device (4) being provided at one end of the rotating arm (3), the driving device (4) being used to drive the roller to move axially, one end of the push-pull oil cylinder (2) being hingedly connected to the fixed frame (1), the other end of the push-pull oil cylinder (2) being hingedly fixed to the rotating arm (3) via a support rod, and the push-pull oil cylinder (2) being used to control the rotation of the rotating arm (3) relative to the fixed frame (1).

2. A hydraulic roller for driving a vehicle to travel at a low speed according to claim 1, characterized in that: The driving device (4) comprises a driving motor (44) and a hydraulic circuit for controlling the rotation of the driving motor (44); the output shaft of the driving motor (44) is connected to the roller through a coupling (43).

3. The hydraulic roller for driving a vehicle to travel at a low speed according to claim 1, characterized in that: The roller comprises a roller shaft (41) and a sleeve (42) sleeved in the middle of the roller shaft (41); the surface of the sleeve (42) is provided with an anti-skid layer, the anti-skid layer is provided with anti-skid patterns, a plurality of protrusions are evenly arranged axially on the roller shaft (41), and grooves corresponding to the plurality of protrusions are arranged in the sleeve (42); the protrusions are transitionally matched with the grooves.

4. The hydraulic roller for driving a vehicle to travel at a low speed according to claim 1, characterized in that: A pressure detector is provided at the connection between the push-pull oil cylinder (2) and the rotating arm (3), and the pressure detector is used to detect the pressure applied by the push-pull oil cylinder (2) to the rotating arm (3).

5. The hydraulic roller for driving a vehicle to travel at a low speed according to claim 1, characterized in that: A structural reinforcement plate is arranged at the top end of the fixing frame (1), and a buffer layer is arranged on the structural reinforcement plate.

6. The hydraulic roller for driving a vehicle to travel at a low speed according to claim 1, characterized in that: Both ends of the fixing frame (1) are provided with extensions, and threaded holes are provided on the extensions.

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