Low-noise rotor assembly for steering pump

Abstract

The low-noise rotor combination for the steering pump comprises a rotor body and a cylindrical pin, a plurality of rotor notches are evenly formed in the rotor body in the circumferential direction, and first oil guide grooves are formed in the connecting positions of the side wall of the rotor body and the rotor notches. And a plurality of second oil guide grooves are formed between the side wall of the end part of the cylindrical pin and the curved surface of the cylinder in the circumferential direction, and the structure is beneficial to forming oil films on the side walls of the rotor body and the cylindrical pin, so that friction generated between the rotor body and the cylindrical pin and the side plate during rotation is relieved.

Description

Technical Field

[0001] This utility model relates to the field of steering pump technology, and in particular to a low-noise rotor assembly for steering pumps. Background Technology

[0002] The power steering pump is internally composed of key components such as a stator, rotor, and cylindrical pins (blades). The pump shaft drives the rotor and cylindrical pins to rotate at high speed, providing a continuous and stable high-pressure oil supply. When the power steering pump is working, the cylindrical pins rotate at high speed within the trajectory of the stator's curved surface. At the same time, an angle is formed between two cylindrical pins to create a sealed cavity (accumulation) for oil supply.

[0003] Traditional power steering pumps are prone to wear on the side plates due to high friction between the rotor and the side plates during operation. This reduces the sealing between the rotor and the side plates, which is detrimental to the long-term operation of the power steering pump.

[0004] Meanwhile, traditional power steering pumps often produce significant noise when the cylindrical pin rotates from the oil suction area to the oil pressure area during operation. Utility Model Content

[0005] This invention proposes a low-noise rotor assembly for a steering pump, which solves the aforementioned problems existing in the use of the prior art.

[0006] The technical solution of this utility model is implemented as follows: a low-noise rotor assembly for a steering pump includes a rotor body and a cylindrical pin. The rotor body has a plurality of rotor slots evenly opened along the circumference. A first oil guide groove is opened at the junction of the side wall of the rotor body and the rotor slots. A plurality of second oil guide grooves are opened along the circumference between the side wall of the end of the cylindrical pin and the curved surface of the cylinder.

[0007] The present invention is further configured such that: the rotor slot includes a first sidewall, a second sidewall and a third sidewall, the first sidewall is located at one end of the rotor slot near the center of the rotor body, the second sidewall and the third sidewall are located at the two ends of the first sidewall and are used to connect with the first sidewall, the second sidewall and the third sidewall are both arc surfaces, and the second sidewall and the third sidewall are asymmetrical structures.

[0008] The present invention is further configured such that a first rounded corner is formed at the junction of the first sidewall, the second sidewall, and the third sidewall.

[0009] The present invention is further configured such that: the first oil guide groove extends from the first side wall on the side wall of the rotor body and gradually approaches the axis of the rotor body, and the extension path of the first oil guide groove is arc-shaped.

[0010] The present invention is further configured such that the cross-section of the first oil guide groove is reduced along the extension direction.

[0011] The present invention is further configured such that a second rounded corner is formed at the junction of the side wall of the rotor body and the first oil guide groove.

[0012] The present invention is further configured such that a third oil guide groove is connected between each pair of adjacent rotor slots, the third oil guide groove is opened on the side wall of the rotor body, and the third oil guide groove extends from the second side wall to the third side wall.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] 1. This structure facilitates the formation of an oil film on the side walls of the rotor body and the cylindrical pin, thereby reducing the friction between the rotor body and the cylindrical pin and the side plate during rotation.

[0015] 2. The rotor slot adopts an irregular structure design and is set with an arc surface. When the directional pump is working, the rotor rotation direction can be kept in the same direction as the slot. When the cylindrical pin is subjected to impact force, it slides into the slot and is subjected to unbalanced force on both sides of the slot, which can effectively control the noise that causes abnormal noise.

[0016] 3. The first rounded corner can prevent the curved surface of the cylindrical pin from being bumped and worn.

[0017] 4. The second fillet can reduce the friction between the rotor body and the side plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0021] The numbers in the figure are: 1 rotor body, 11 rotor slot, 111 first side wall, 112 second side wall, 113 third side wall, 114 first fillet, 12 first oil guide groove, 121 second fillet, 13 third oil guide groove, 2 cylindrical pin, 21 second oil guide groove. Detailed Implementation

[0022] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example:

[0024] like Figures 1 to 2 As shown, this utility model discloses a low-noise rotor assembly for a steering pump, including a cylindrical pin 2 and a rotor body 1 sintered from powder metallurgy material. The rotor body 1 has a plurality of rotor slots 11 evenly opened along the circumference. Each rotor slot 11 includes a first sidewall 111, a second sidewall 112, and a third sidewall 113. The first sidewall 111 is located at one end of the rotor slot 11 near the center of the rotor body 1. The second sidewall 112 and the third sidewall 113 are located at the two ends of the first sidewall 111 and are used to connect with the first sidewall 111. In this structure, the second sidewall 112 and the third sidewall 113 are both arc surfaces, and the second sidewall 112 and the third sidewall 113 are asymmetrical structures. In addition, a first fillet 114 is formed between the connection points of the first sidewall 111, the second sidewall 112, and the third sidewall 113.

[0025] From a structural analysis, the rotor slot 11 on the traditional rotor body 1 is a parallel surface. This means that when the cylindrical pin 2 returns to the rotor slot 11, its direction of movement is exactly opposite to the direction of pump rotation. Therefore, the cylindrical pin 2 will be subjected to a reaction force, which will cause the cylindrical pin 2 to collide with the rotor slot 11, resulting in noise problems.

[0026] In the structure provided by this utility model, when the rotor body 1 drives the cylindrical pin 2 to rotate in the stator, and the cylindrical pin 2 slides into the rotor slot 11 when it is subjected to an impact force, since the second side wall 112 and the third side wall 113 are asymmetrical structures, the unbalanced force on both sides of the rotor slot 11 will make the cylindrical pin 2 move in the same direction as the pump, thus achieving the effect of reducing noise.

[0027] A first oil guide groove 12 is provided at the junction of the side wall of the rotor body 1 and the rotor slot 11. The first oil guide groove 12 extends from the first side wall 111 on the side wall of the rotor body 1 and gradually approaches the axis of the rotor body 1. At the same time, the extension path of the first oil guide groove 12 is arc-shaped, and the cross-section of the first oil guide groove 12 is reduced along the extension direction. In addition, a second rounded corner 121 is formed at the junction of the side wall of the rotor body 1 and the first oil guide groove 12.

[0028] Several second oil guide grooves 21 are provided circumferentially between the side wall of the end of the cylindrical pin 2 and the curved surface of the cylinder.

[0029] A third oil guide groove 13 is connected between each pair of adjacent rotor slots 11. The third oil guide groove 13 is opened on the side wall of the rotor body 1 and extends from the second side wall 112 to the third side wall 113.

[0030] The first oil guide groove 12, the second oil guide groove 21, and the third oil guide groove 13 enable the oil to form an oil film on the side wall of the cylindrical pin 2 and the rotor body 1, thereby reducing the friction between the cylindrical pin 2 and the rotor body 1 and the side plate.

[0031] The separate arrangement of the first oil guide groove 12 and the third oil guide groove 13 can better form a uniform oil film on the side of the rotor body 1. At the same time, the extension direction of the first oil guide groove 12 is facing the rotation direction of the rotor body 1, which can better allow the oil to enter the first oil guide groove 12.

[0032] It should also be noted that the terms used in this utility model, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-noise rotor assembly for a steering pump, comprising a rotor body (1) and a cylindrical pin (2), wherein the rotor body (1) is provided with a plurality of rotor slots (11) evenly distributed along the circumference, characterized in that: A first oil guide groove (12) is provided at the junction of the side wall of the rotor body (1) and the rotor slot (11), and a number of second oil guide grooves (21) are provided circumferentially between the side wall of the end of the cylindrical pin (2) and the curved surface of the cylinder.

2. The low-noise rotor assembly for a steering pump according to claim 1, characterized in that: The rotor slot (11) includes a first sidewall (111), a second sidewall (112), and a third sidewall (113). The first sidewall (111) is located at one end of the rotor slot (11) near the center of the rotor body (1). The second sidewall (112) and the third sidewall (113) are located at the two ends of the first sidewall (111) and are used to connect with the first sidewall (111). The second sidewall (112) and the third sidewall (113) are both arc surfaces and have an asymmetrical structure.

3. The low-noise rotor assembly for a steering pump according to claim 2, characterized in that: A first rounded corner (114) is formed at the junction of the first sidewall (111), the second sidewall (112), and the third sidewall (113).

4. A low-noise rotor assembly for a steering pump according to claim 3, characterized in that: The first oil guide groove (12) extends from the first side wall (111) on the side wall of the rotor body (1) and gradually approaches the axis of the rotor body (1). The extension path of the first oil guide groove (12) is arc-shaped.

5. A low-noise rotor assembly for a steering pump according to claim 4, characterized in that: The cross-section of the first oil guide groove (12) is reduced along the extension direction.

6. A low-noise rotor assembly for a steering pump according to claim 5, characterized in that: The side wall of the rotor body (1) has a second rounded corner (121) at the junction with the first oil guide groove (12).

7. A low-noise rotor assembly for a steering pump according to claim 2, characterized in that: Each pair of adjacent rotor slots (11) is connected by a third oil guide groove (13), which is located on the side wall of the rotor body (1) and extends from the second side wall (112) to the third side wall (113).

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