A rotor floating device for hydraulic retarder

Abstract

In order to solve the problem that the rotor of the hydraulic retarder drives air to impact the stator in the non-working state, thereby reducing the vehicle driving efficiency, the present invention provides a rotor floating device for the hydraulic retarder, which is characterized in that it includes an input shaft, a rotor, a torsion spring and a concentric shaft. The concentric shaft is fixedly connected to the side of the stator close to the rotor. The input shaft coaxially passes through the rotor and is coaxially fixedly connected to the concentric shaft. The rotor is slidably connected to the input shaft along the axial direction of the input shaft. The two ends of the torsion spring are respectively fixedly connected to the rotor and the concentric shaft. The rotor adopts a floating structure design and can automatically adjust the distance between it and the stator according to the working conditions, thereby realizing the working state and the non-working state at the same time, eliminating the negative effects of the hydraulic retarder in the non-working state, and ensuring the driving efficiency of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle hydraulic retarders, and in particular to a rotor floating device for a hydraulic retarder. Background Art

[0002] A hydraulic retarder is a vehicle auxiliary braking device that converts the vehicle's kinetic energy into heat energy, dissipating this heat into the air through a heat sink, thereby decelerating the vehicle. The rotor (active turbine) of the hydraulic retarder is connected to the vehicle's transmission components, while the stator (fixed wheel) is connected to the retarder housing. The rotor and stator form a mechanism that generates a mutual force. When the vehicle decelerates, the retarder's working medium, liquid, enters the working chamber formed by the rotor and stator. The vehicle's transmission drives the rotor to rotate at high speed, which in turn drives the working fluid to flow at high speed and impact the stator. The stator then impacts the rotor in reverse, decelerating the rotor and the vehicle.

[0003] When the hydraulic retarder is working, it relies on the rotor to drive the working fluid to impact the stator to achieve vehicle braking. In the non-working state, there is no working fluid between the rotor and the stator, only air. However, the high-speed rotating rotor will still drive the air to impact the stator, generating braking torque and consuming the vehicle's normal driving power. Summary of the Invention

[0004] In order to solve the problem that the rotor-driven air of the hydraulic retarder impinges on the stator in the non-operating state, thereby reducing the vehicle driving efficiency, the present invention provides a rotor floating device for the hydraulic retarder, and the technical solution adopted is as follows:

[0005] A rotor floating device for a hydraulic retarder is characterized by comprising an input shaft, a rotor, a torsion spring and a concentric shaft, wherein the concentric shaft is fixedly connected to a side of the stator close to the rotor, the input shaft coaxially passes through the rotor and is coaxially fixedly connected to the cocentric shaft, the rotor is slidably connected to the input shaft along the axial direction of the input shaft, and the two ends of the torsion spring are respectively fixedly connected to the rotor and the concentric shaft.

[0006] Preferably, the rotor and the coaxial shaft are both provided with positioning posts at their ends close to each other, and both ends of the torsion spring are fixedly connected to the positioning posts.

[0007] Preferably, the input shaft and the coaxial shaft are fixedly connected via a spline.

[0008] Preferably, the torsion spring has a serpentine structure.

[0009] The beneficial effects of the present invention are:

[0010] In the working state, the rotor drives one end of the torsion spring to rotate, and the length of the torsion spring is shortened due to the rotation, thereby driving the rotor to move toward the concentric axis, that is, the stator side, and finally fit with the stator to prevent the leakage of high-pressure working fluid and the reduction of braking power; in the non-working state, the torsion spring extends, driving the rotor to move away from the concentric axis, that is, the stator side, thereby reducing the impact of the air driven by the rotor on the stator and ensuring the vehicle driving efficiency; the rotor adopts a floating structure design, which can automatically adjust the distance between it and the stator according to the working conditions, and realize the working state and non-working state at the same time, and eliminate the negative effects of the hydraulic retarder in the non-working state, thereby ensuring the vehicle driving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the structure of the present invention

[0012] Figure 2 Schematic diagram of the explosion structure of the present invention

[0013] Figure 3 Schematic diagram of the rotor structure

[0014] Figure 4 Schematic diagram of the concentric shaft structure

[0015] Among them, 1-input shaft, 2-rotor, 3-torsion spring, 4-concentric shaft, 5-locating column, 6-external spline, 7-internal spline. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0017] In the description of the invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the viewing direction or positional relationship and are only for the convenience of describing the invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0018] like Figure 1-4The rotor floating device for the hydraulic retarder shown includes an input shaft 1, a rotor 2, a torsion spring 3 and a concentric shaft 4. The concentric shaft 4 is fixedly connected to the side of the stator close to the rotor 2. The input shaft 1 and the rotor 2 are coaxially distributed, and the right end passes through the rotor 1 and is coaxially fixedly connected to the concentric shaft 4. The rotor 2 can slide left and right along the length direction of the input shaft 1. The right end of the input shaft 1 is provided with an external spline 6, and the left end of the concentric shaft 4 is provided with an internal spline 7. The two are fixedly connected by the splines. The right end of the rotor 2 and the left end of the concentric shaft 4 are both provided with multiple groups of positioning columns 5 distributed along the circumferential direction. The torsion spring 3 is a serpentine structure, and its two ends are respectively fixedly connected to the positioning columns 5 on the rotor 2 and the concentric shaft 4.

[0019] In addition, an annular boss is provided on the left side of the outer surface of the concentric shaft 4, which can limit the axial movement of the right end of the rotor 2. When the rotor 2 moves to the position of the annular boss of the concentric shaft 4, it stops moving to the right. At this time, the rotor 2 is in contact with the stator.

[0020] The working principle of this device is as follows:

[0021] In the working state, the reaction force generated when the rotor 2 drives the working fluid causes the rotor 2 to rotate around the input shaft 1, driving the left end of the torsion spring 3 to rotate, and the concentric shaft 4 locks the right end of the torsion spring 3 with the input shaft 1. When the working fluid resistance of the rotor 2 increases, the torque transmitted to the torsion spring 3 by the rotor 2 increases. The rotation speed of the rotor 2 is higher than that of the input shaft 1 and the concentric shaft 4 in a short time. The length of the torsion spring 3 is compressed and shortened due to rotation. The contracted torsion spring 3 pulls the rotor 2 toward the direction of the concentric shaft 4, that is, to the right. The right end of the rotor 2 finally contacts the left end of the concentric shaft 4 and stops moving. At this time, the rotor 2 is in contact with the stator, and the input shaft 1, rotor 2, torsion spring 3 and concentric shaft 4 have the same rotation speed, thereby preventing leakage of high-pressure working fluid and reducing braking power.

[0022] In the non-working state, the torsion spring 3 is only subjected to a small torque generated by the rotor 2 driving the air. The torsion spring 3 extends under the action of its own elastic force, pushing the rotor 2 away from the concentric axis 4, that is, to the left, increasing the distance between the rotor 2 and the stator, reducing the impact of the air driven by the rotor 2 on the stator, and ensuring the vehicle driving efficiency.

[0023] The rotor 2 adopts a floating structure and can automatically adjust the distance between it and the stator according to the working conditions. At the same time, it can achieve the fit between the rotor 2 and the stator in the working state and eliminate the negative effects of air impact on the stator in the non-working state, thereby ensuring the driving efficiency of the vehicle.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A rotor floating device for a hydraulic retarder, characterized in that: The invention comprises an input shaft (1), a rotor (2), a torsion spring (3) and a coaxial shaft (4), wherein the coaxial shaft (4) is fixedly connected to a side of the stator close to the rotor (2), the input shaft (1) coaxially passes through the rotor (2) and is coaxially fixedly connected to the coaxial shaft (4), the rotor (2) is slidably connected to the input shaft (1) along the axial direction of the input shaft (1), and the two ends of the torsion spring (3) are respectively fixedly connected to the rotor (2) and the coaxial shaft (4).

2. The rotor floating device for a hydraulic retarder according to claim 1, characterized in that: A positioning column (5) is provided at one end of the rotor (2) and the coaxial shaft (4) that is close to each other, and both ends of the torsion spring (3) are fixedly connected to the positioning column (5).

3. The rotor floating device for a hydraulic retarder according to claim 1, characterized in that: The input shaft (1) and the coaxial shaft (4) are fixedly connected via a spline.

4. The rotor floating device for a hydraulic retarder according to claim 1, characterized in that: The torsion spring (3) has a serpentine structure.

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