Hydraulic driving device for driven axle

Abstract

The utility model is applicable to the technical field of vehicle chassis, and provides a hydraulic driving device for a driven axle, which comprises rollers, a hydraulic motor, a movable bracket, a pin shaft, an oil cylinder pin shaft, a mounting bracket, a pressing oil cylinder, tires and an axle. When hydraulic oil is introduced into the hydraulic motor, the hydraulic motor drives the roller to rotate, the roller drives the tire to rotate, so that a vehicle runs, and by changing the direction of the hydraulic oil input into the hydraulic motor, the tire is driven to rotate by the roller, so that the tire is driven to rotate. The rotating direction of the hydraulic motor is changed, the vehicle is controlled to move forwards and backwards, the rotating speed of the hydraulic motor is controlled by changing the flow of hydraulic oil input into the hydraulic motor, and therefore the running speed of the vehicle is controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle chassis, and in particular relates to a hydraulic drive device for a driven axle. Background Art

[0002] A vehicle's axles are categorized as drive axles and driven axles, depending on whether they transmit power. Drive axles, equipped with a final drive, differential, and axles, transfer power from the vehicle's transmission to the tires, thereby driving the vehicle. Driven axles, however, lack power transmission and simply serve as load carriers or steering. Driven axles require power input from the engine and transmission, while driven axles lack power and can only follow the vehicle's movements.

[0003] In some vehicles, such as trailer chassis, there is no engine and gearbox to provide power, no drive axle, only a driven axle. If the vehicle needs to move, a device is needed that can be applied to the driven axle to drive the vehicle and realize the differential function of the left and right tires when turning. It can also cut off the power source at any time without affecting the driving performance of the non-drive axle. Utility Model Content

[0004] The utility model provides a hydraulic driving device for a driven axle, aiming to solve the problem that an existing trailer chassis has no engine and gearbox to provide power, no driving axle and only a driven axle.

[0005] The present invention is implemented as follows: a hydraulic drive device for a driven bridge comprises a roller, a hydraulic motor, a movable bracket, a pin shaft, a cylinder pin shaft, a mounting bracket, a clamping cylinder, a tire and an axle, the hydraulic motor and the roller are fixedly connected to the movable bracket, the movable bracket is rotatably connected to the mounting bracket via the pin shaft, the front end of the clamping cylinder is fixedly connected to the cylinder pin shaft, and the cylinder pin shaft is rotatably connected to the movable bracket, the rear end of the clamping cylinder is rotatably connected to the mounting bracket, the mounting bracket is fixedly connected to the outer wall of the axle, the hydraulic motor and the roller are bolted to the movable bracket, and the roller is fixedly connected to the output end of the hydraulic motor.

[0006] Preferably, the outer wall of the roller is provided with a strip-shaped protrusion.

[0007] Preferably, the movable bracket (3) is made of steel, and the movable bracket (3) may also be a cast integral structure.

[0008] Preferably, the axle is a torsion-plate axle.

[0009] Preferably, the power hydraulic oil of the hydraulic motor and the pressing oil cylinder is provided by a hydraulic station, and the valve circuit on the hydraulic station controls the rotation of the hydraulic motor and the extension and retraction of the pressing oil cylinder.

[0010] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0011] When the vehicle needs to be driven, hydraulic oil is introduced into the rear end of the clamping cylinder, and the piston of the clamping cylinder extends, pushing the movable bracket to rotate around the pin shaft, so that the roller presses the tire. The clamping force of the roller on the tire is controlled by adjusting the hydraulic oil pressure of the clamping cylinder. When hydraulic oil is introduced into the hydraulic motor, the hydraulic motor drives the roller to rotate, and the roller drives the tire to rotate, so that the vehicle moves. By changing the direction of the hydraulic oil input to the hydraulic motor, the direction of rotation of the hydraulic motor is changed to control the forward and backward movement of the vehicle. By changing the flow of hydraulic oil input to the hydraulic motor, the speed of the hydraulic motor is controlled, thereby controlling the driving speed of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0014] In the figure: 1. Roller; 2. Hydraulic motor; 3. Movable bracket; 4. Pin; 5. Cylinder pin; 6. Mounting bracket; 7. Clamping cylinder; 8. Tire; 9. Axle. DETAILED DESCRIPTION

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0016] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0017] The embodiment of the present utility model provides a hydraulic drive device for a driven bridge, such as Figure 1-2 As shown, it includes a roller 1, a hydraulic motor 2, a movable bracket 3, a pin 4, a cylinder pin 5, a mounting bracket 6, a clamping cylinder 7, a tire 8 and an axle 9. The hydraulic motor 2 and the roller 1 are fixedly connected to the movable bracket 3. The movable bracket 3 is rotatably connected to the mounting bracket 6 through the pin 4. The front end of the clamping cylinder 7 and the cylinder pin 5 are fixedly connected, and the cylinder pin 5 and the movable bracket 3 are rotatably connected. The rear end of the clamping cylinder 7 and the mounting bracket 6 are rotatably connected. The mounting bracket 6 is fixedly connected to the outer wall of the axle 9. The hydraulic motor 2 and the roller 1 are bolted to the movable bracket 3, and the roller 1 and the output end of the hydraulic motor 2 are fixedly connected.

[0018] It should be noted that, since there is no engine and gearbox to provide power in the existing trailer chassis, there is no driving axle but only a driven axle. Therefore, in order to solve the problem that there is no engine and gearbox to provide power, there is no driving axle but only a driven axle in the existing trailer chassis, this solution is used. When the vehicle needs to be driven, hydraulic oil is introduced into the rear end of the clamping cylinder 7, and the piston of the clamping cylinder 7 extends, pushing the movable bracket 3 to rotate around the pin 4, so that the roller 1 presses the tire 8. The size of the clamping force of the roller 1 on the tire 8 is controlled by adjusting the hydraulic oil pressure of the clamping cylinder 7. When hydraulic oil is introduced into the hydraulic motor 2, the hydraulic motor 2 drives the roller 1 to rotate, and the roller 1 drives the tire 8 to rotate, so that the vehicle moves. By changing the direction of the hydraulic oil input to the hydraulic motor 2, the rotation direction of the hydraulic motor 2 is changed to control the forward and backward movement of the vehicle. By changing the hydraulic oil flow input to the hydraulic motor 2, the speed of the hydraulic motor 2 is controlled, thereby controlling the driving speed of the vehicle.

[0019] In a further preferred embodiment of the present invention, Figure 1 As shown, the outer wall of the roller 1 is provided with strip-shaped protrusions.

[0020] In this embodiment, the strip-shaped protrusions increase the friction force of the outer wall of the roller 1, ensuring that the roller 1 drives the tire 8 to rotate.

[0021] In a further preferred embodiment of the present invention, Figure 1 As shown, the movable bracket 3 is made of steel, and the movable bracket 3 can also adopt a cast integrated structure.

[0022] In a further preferred embodiment of the present invention, Figure 1 As shown, the axle 9 is a torsion-plate axle.

[0023] In this embodiment, the elasticity of the axle is improved by using a torsion-plate axle.

[0024] In a further preferred embodiment of the present invention, Figure 1As shown, the power hydraulic oil of the hydraulic motor 2 and the pressing oil cylinder 7 is provided by a hydraulic station, and the valve circuit on the hydraulic station controls the rotation of the hydraulic motor 2 and the extension and retraction of the pressing oil cylinder 7.

[0025] In this embodiment, the hydraulic oil circuits of the left and right hydraulic motors 2 are connected together to achieve a balance in the driving force of the left and right rollers 1. At the same time, when the vehicle turns, because the left and right hydraulic oil circuits are interconnected, they can function as a differential, and the left and right tires 8 can travel along different trajectories.

[0026] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0027] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0028] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A hydraulic drive device for a driven axle, characterized in that: The invention comprises a roller (1), a hydraulic motor (2), a movable bracket (3), a pin shaft (4), a cylinder pin shaft (5), a mounting bracket (6), a clamping cylinder (7), a tire (8) and an axle (9), wherein the hydraulic motor (2) and the roller (1) are fixedly connected to the movable bracket (3), the movable bracket (3) is rotatably connected to the mounting bracket (6) via the pin shaft (4), the front end of the clamping cylinder (7) is fixedly connected to the cylinder pin shaft (5), and the cylinder pin shaft (5) is rotatably connected to the movable bracket (3), the rear end of the clamping cylinder (7) is rotatably connected to the mounting bracket (6), the mounting bracket (6) is fixedly connected to the outer wall of the axle (9), the hydraulic motor (2) and the roller (1) are bolted to the movable bracket (3), and the roller (1) is fixedly connected to the output end of the hydraulic motor (2).

2. A hydraulic drive device for a driven axle according to claim 1, characterized in that: The outer wall of the roller (1) is provided with a strip-shaped protrusion.

3. A hydraulic drive device for a driven axle according to claim 1, characterized in that: The movable bracket (3) is made of steel, and the movable bracket (3) adopts a cast integrated structure.

4. A hydraulic drive device for a driven axle according to claim 3, characterized in that: The axle (9) is a torsion-plate type axle.

5. The hydraulic drive device for a driven axle according to claim 1, characterized in that: The power hydraulic oil of the hydraulic motor (2) and the pressing oil cylinder (7) is provided by a hydraulic station, and the valve circuit on the hydraulic station controls the rotation of the hydraulic motor (2) and the extension and contraction of the pressing oil cylinder (7).

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