Novel variable displacement steering pump for commercial vehicle

Abstract

The utility model discloses a novel variable displacement steering pump for a commercial vehicle, relates to the technical field of steering systems of commercial vehicles, and aims to solve the technical problems that the energy of the vehicle is wasted and the temperature of a steering system is increased due to the fact that excessive oil circulates in the pump at present. A driving shaft is fixedly installed in the middle of the rotor, a stator is connected to the outer wall of the rotor, and an outer ring is fixedly installed between the stator and the oil inlet. Under the condition that the rotating speed of the pump is increased, the displacement is reduced to keep the flow stable, so that the flow more than the flow required by a steering system is not generated, the waste of excess energy is avoided, the purposes of energy conservation and cooling are achieved, and the system has the advantages that oil inlet and outlet control is stable, and the problem of temperature rise caused by excess oil flow is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of commercial vehicle steering systems, and more specifically, to a novel variable displacement steering pump for commercial vehicles. Background Technology

[0002] Currently, the steering system commonly used in the commercial vehicle industry is the double-acting vane power steering pump. The pump's displacement per revolution is fixed.

[0003] Currently, the flow rate of a double-acting vane power steering pump is equal to the rotational speed multiplied by the displacement, and the pump's flow rate increases with the rotational speed. When the flow rate exceeds the steering system's requirements, the excess oil bypasses the pressure outlet and enters the suction port (the oil circulates within the pump), resulting in wasted vehicle energy and increased steering system temperature. In view of this, we propose a new type of variable displacement power steering pump for commercial vehicles. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a new type of variable displacement steering pump for commercial vehicles to solve the technical problem of excess oil circulating in the pump, which causes waste of vehicle energy and leads to an increase in steering system temperature.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel variable displacement steering pump for commercial vehicles, comprising a housing, a bladed rotor fixedly installed inside the housing, a drive shaft fixedly installed in the middle of the rotor, a stator connected to the outer wall of the rotor, an outer ring fixedly installed between the stator and the oil inlet, and an oil inlet and an oil outlet provided at the top of the housing that communicate with the interior of the housing.

[0006] This invention limits flow rate by hydraulically adjusting the displacement. When the pump speed increases, the displacement is reduced to maintain a stable flow rate, thus preventing the generation of flow exceeding the steering system's requirements and avoiding the waste of excess energy, thereby achieving energy saving and cooling. It can significantly reduce the energy consumption of commercial vehicle engines, lower the temperature of the commercial vehicle steering system, reduce the cooling measures required for the steering system, and improve steering system efficiency; compared with traditional double-acting vane steering pumps, it consumes less fuel and emits less carbon dioxide.

[0007] Preferably, the stator is circular in shape, and the inner wall of the stator is in contact with the tip of the blade on the rotor.

[0008] Preferably, the shell is made of high-strength aluminum alloy.

[0009] Preferably, a spline hole for connection with the drive shaft is provided through the center of the rotor.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention limits flow rate by hydraulically adjusting the displacement. When the pump speed increases, the displacement is reduced to maintain a stable flow rate, thus preventing the generation of flow exceeding the steering system's requirements and avoiding the waste of excess energy, thereby achieving energy saving and cooling. It can significantly reduce the energy consumption of commercial vehicle engines, lower the temperature of the commercial vehicle steering system, reduce the cooling measures required for the steering system, and improve steering system efficiency; compared with traditional double-acting vane steering pumps, it consumes less fuel and emits less carbon dioxide. Attached Figure Description

[0012] Figure 1 This is a front structural diagram of the present invention;

[0013] Figure 2 This is a side view of the present invention.

[0014] Figure 3 This is a schematic diagram illustrating the working principle of this utility model;

[0015] Figure 4 This is a characteristic curve of the variable displacement pump of this utility model.

[0016] The labels in the diagram are as follows: 1. Oil inlet; 2. Oil outlet; 3. Housing; 4. Rotor; 5. Drive shaft; 6. Stator; 7. Outer ring. Detailed Implementation

[0017] like Figures 1 to 3 As shown, this utility model relates to a novel variable displacement steering pump for commercial vehicles, comprising a housing 3, a bladed rotor 4 fixedly mounted inside the housing 3, a drive shaft 5 fixedly mounted in the middle of the rotor 4, a stator 6 connected to the outer wall of the rotor 4, and an outer ring 7 fixedly mounted between the stator 6 and the oil inlet 1. The top of the housing 3 has an oil inlet 1 and an oil outlet 2 communicating with the interior of the housing 3. Oil is drawn into the housing 3 through the oil inlet 1. The rotor 4 is connected to the engine drive shaft 5 via a spline and rotates under the drive of the engine. Multiple blade slots are evenly distributed on the rotor 4, and the blades are installed in the blade slots and can slide back and forth within the slots.

[0018] In an embodiment of this utility model, the stator 6 is circular in shape, and the inner wall of the stator 6 is in contact with the tip of the blade on the rotor 4. When the rotor 4 rotates, the blade is pressed against the inner wall of the stator 6 under the action of centrifugal force and hydraulic oil pressure, thereby forming multiple sealed working cavities between the blade, the rotor 4, the stator 6 and the housing 3.

[0019] In the embodiments of this utility model, the shell 3 is made of high-strength aluminum alloy, which has the advantages of being lightweight, high-strength, and having good heat dissipation performance.

[0020] In an embodiment of this utility model, a spline hole is provided through the center of the rotor 4 to connect with the drive shaft 5, thereby improving the connection strength and enabling the rotor 4 to rotate synchronously with the drive shaft 5.

[0021] Working principle: This embodiment provides a new type of variable displacement steering pump for commercial vehicles. First, the oil enters the rotor 4 inside the housing 3 through the oil inlet 1. When the entire system is kept within the control point, the oil can be discharged through the oil outlet 2. Once the control point is reached, the variable displacement steering pump will adjust the position of the stator 6 through the pressure difference on both sides of the stator 6, thereby changing the internal volume of the stator 6, i.e., the displacement, so that the oil can be stably discharged through the oil outlet 2, thereby maintaining the flow required by the steering system. This reduces the energy consumption of the commercial vehicle engine, lowers the temperature of the commercial vehicle steering system, reduces the cooling measures required for the steering system, and maintains the stability of the overall operating temperature.

[0022] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A novel variable displacement steering pump for commercial vehicles, characterized in that, The device includes a housing (3), inside which a bladed rotor (4) is fixedly installed, and a drive shaft (5) is fixedly installed in the middle of the rotor (4). A stator (6) is connected to the outer wall of the rotor (4), and an outer ring (7) is fixedly installed between the stator (6) and the oil inlet (1). The top of the housing (3) is provided with an oil inlet (1) and an oil outlet (2) that communicate with the inside of the housing (3).

2. The novel variable displacement steering pump for commercial vehicles according to claim 1, characterized in that, The stator (6) is circular in shape, and the inner wall of the stator (6) is in contact with the tip of the blade on the rotor (4).

3. The novel variable displacement steering pump for commercial vehicles according to claim 1, characterized in that, The shell (3) is made of high-strength aluminum alloy.

4. The novel variable displacement steering pump for commercial vehicles according to claim 1, characterized in that, The rotor (4) has a spline hole through the center that is connected to the drive shaft (5).

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