Steering gear power-assisted shell for new energy vehicle

Abstract

The utility model discloses a steering gear power-assisted shell for a new energy vehicle, which comprises a shell, a shaft channel positioned in the shell and used for mounting a transmission shaft, and a working cavity communicated with the shaft channel, and is characterized in that at least one groove is formed in the annular end surface of the working cavity around the circumferential direction of the shaft channel; one end of the groove in the circumferential direction is in smooth transition with the annular end face of the working cavity, the other end of the groove is in transition connection with the annular end face of the working cavity through a side vertical face, and a magnetic block is embedded in the side vertical face or a magnetic block is arranged in the position, close to the side vertical face, in the machine shell. The utility model provides a steering gear power-assisted shell for a new energy vehicle, which can reduce generated metal particles entering a shaft channel in a mode of continuously collecting the metal particles, so that the metal particles in a rotating gap between a transmission shaft and the shaft channel are less.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gears for new energy vehicles, in particular to a steering gear power-assisting housing for new energy vehicles. Background Art

[0002] The steering gear for new energy vehicles is an important component to achieve easy steering of the vehicle. It applies additional driving force to the transmission shaft, making it extremely labor-saving for the driver to steer the vehicle. Existing steering gears are mainly divided into hydraulic power steering gears and electric power steering gears. Since the electric power steering gear directly provides steering assistance by the electric power motor, it eliminates the power steering oil pump, hose, hydraulic oil, conveyor belt and pulley installed on the engine required by the hydraulic power steering gear, which saves energy and protects the environment. Therefore, it is increasingly used in new energy vehicles.

[0003] In the existing electric power steering device, some metal particles are inevitably generated during the rotation of the transmission shaft in the power housing. When the metal particles enter the rotation gap between the transmission shaft and the inner wall of the shaft hole, they will inevitably interfere with the rotation of the transmission shaft. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related technology at least to a certain extent: to provide a steering gear power-assisting housing for new energy vehicles, which can reduce the amount of metal particles generated entering the shaft channel by continuously collecting metal particles, so that there are fewer metal particles in the rotating gap between the transmission shaft and the shaft channel.

[0005] To this end, one purpose of the utility model is to propose a steering gear power-assist housing for new energy vehicles, which includes a casing, an axial channel for installing a transmission shaft inside the casing, and a working chamber connected to the axial channel, characterized in that: at least one groove is provided on the annular end surface of the working chamber around the circumference of the axial channel, one end of the groove along the circumference smoothly transitions to the annular end surface of the working chamber, and the other end is connected through a side elevation transition, a magnetic block is embedded on the side elevation, or a magnetic block is built into the casing near the side elevation.

[0006] According to an example of the present invention, the magnetic block is a permanent magnet, and the permanent magnet is embedded in the side elevation surface of the groove.

[0007] According to an example of the utility model, the housing has a mounting groove extending to a position adjacent to the side elevation, and the magnetic block is embedded in the mounting groove.

[0008] According to an example of the utility model, the magnetic block is an electromagnet, and a switch for controlling the on and off of power to the electromagnet is provided outside the housing.

[0009] According to an example of the present invention, the side elevation surface is concave to form a receiving groove for receiving foreign particles.

[0010] The above technical solution has the following advantages or beneficial effects: first, a groove is added by utilizing the working cavity already existing on the steering gear housing, and a magnetic block is arranged in the groove, so that metal particles generated by the rotating shaft during the rotation process can continuously fall into the groove when entering the working cavity and be adsorbed by the magnetic block, thereby reducing the metal particles in the shaft channel, and finally allowing the transmission shaft to rotate smoothly in the shaft channel.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the axial side of the power-assist housing of the steering gear for new energy vehicles of the utility model.

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure facing the working chamber along the axial direction.

[0014] Figure 3 for Figure 2 Schematic cross-sectional view along the “AA” direction.

[0015] Figure 4 for Figure 3 A partial enlarged schematic diagram of the "B" area in the middle.

[0016] Among them, 1. housing; 2. shaft channel; 3. working chamber; 3.1. annular end face; 4. groove; 4.1. side elevation; 5. magnetic block; 6. receiving groove; 7. power assist chamber. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] The steering gear power-assist housing for a new energy vehicle according to an embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0019] The electric power steering system, also known as the electric power steering, or EPS for short, is a widely used power steering in existing new energy vehicles. Its basic mechanism is to drive the transmission through the power motor installed on the power housing, thereby providing power to the steering drive shaft. The housing 1 part is mostly made of lightweight aluminum alloy, while the drive shaft is mostly made of iron-based materials. In actual use, micro-metal particles will be continuously generated between the drive shaft and the inner wall of the shaft channel on the housing due to rotational friction. Since the hardness of the iron-based material is greater than that of the aluminum alloy, the above-mentioned micro-metal particles will enter the gap between the drive shaft and the shaft channel and cause wear to the inner wall of the shaft channel, thereby reducing the service life of the overall electric power steering.

[0020] Based on the above-mentioned influence of micro-metal particles generated by friction during use of the transmission shaft made of the above iron-based material. The utility model provides a steering gear power-assist housing for new energy vehicles, as shown in the figure, it includes a housing 1, an axial channel 2 for installing the transmission shaft located in the housing 1, and a working chamber 3 connected to the axial channel 2, characterized in that: at least one groove 4 is provided on the annular end face 3.1 of the working chamber 3 around the circumference of the axial channel 2, and one end of the groove 4 along the circumference smoothly transitions with the annular end face 3.1 of the working chamber 3, and the other end is transitionally connected through the side elevation 4.1, and a magnetic block 5 is embedded on the side elevation 4.1 or a magnetic block 5 is built into the housing 1 near the side elevation 4.1. The magnetic attraction generated by the magnetic block 5 enables the micro-metal particles of the iron-based material to be adsorbed on the magnetic block 5 when passing through the position of the groove 4, or on the inner wall of the groove 4 close to the magnetic block 5.

[0021] Based on one of the preferred examples of the magnetic block 5, the magnetic block 5 is a permanent magnet, which is embedded in the side elevation 4.1 of the groove 4. The side elevation 4.1 is concave to form a slot, and the magnetic block 5 is embedded in the slot through the groove 4.

[0022] Based on the second preferred example of the above-mentioned magnetic block 5: the housing 1 has a mounting groove extending to a position adjacent to the side elevation 4.1, and the mounting groove is embedded with the magnetic block 5. Specifically, the mounting groove is arranged adjacent to the groove on the working chamber, and the notch of the mounting groove is located on the outer wall of the housing 1, so that the magnetic block 5 can be fixed in the mounting groove through the notch of the mounting groove, and the magnetic block 5 is close to the position of the side elevation 4.1. The magnetic attraction force generated by the magnetic block 5 enables the micro-metal particles in the groove to be adsorbed on the side elevation 4.1, so that the micro-metal particles do not contact the magnetic block 5, which is convenient for the removal of the micro-metal particles and the replacement of the magnetic block 5 during the maintenance process.

[0023] Preferably, the magnetic block 5 is an electromagnet, and a switch for controlling the on and off of the electromagnet is provided outside the housing 1.

[0024] Preferably, the side elevation 4.1 is concave to form a receiving groove 6 for accommodating foreign particles. The booster will vibrate during operation, especially when starting and stopping, and the vibration of the casing 1 will inevitably cause some of the micro-metal particles adsorbed on the side elevation 4.1 to fall off the groove 4, thereby affecting the effect of adsorption of the micro-metal particles. In this embodiment, an additional receiving groove 6 is formed by the concave on the side elevation 4.1. Therefore, as the casing 1 vibrates, the micro-metal particles adsorbed on the side elevation 4.1 will continue to gather in the receiving groove 6 under the combined action of magnetic attraction and vibration. Therefore, the vibration of the casing 1 will not only not cause the escape of the micro-metal particles, but also enable the micro-metal particles to be better transferred from the side elevation 4.1 to the receiving groove 6. Finally, during the overhaul of the booster, the working chamber is opened to complete the removal of the micro-metal particles.

[0025] The housing 1 is provided with a power-assisting chamber 7 which is in communication with the shaft channel 2 and is used for installing a power-assisting motor which is in transmission connection with the transmission shaft.

[0026] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0027] For those skilled in the art, various changes and modifications will undoubtedly be obvious after reading the above description. Therefore, the attached claims should be regarded as covering all changes and modifications to the true intent and scope of the utility model. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the utility model.

Claims

1. A steering gear power-assist housing for a new energy vehicle, comprising a housing (1), a shaft channel (2) located in the housing (1) for mounting a transmission shaft, and a working chamber (3) communicating with the shaft channel (2), characterized in that: At least one groove (4) is provided on the annular end surface (3.1) of the working chamber (3) in the circumferential direction around the shaft channel (2); one end of the groove (4) along the circumferential direction smoothly transitions to the annular end surface (3.1) of the working chamber (3); the other end is transitionally connected via a side elevation (4.1); a magnetic block (5) is embedded in the side elevation (4.1), or a magnetic block (5) is built into the housing (1) at a position close to the side elevation (4.1).

2. The steering gear power-assist housing for new energy vehicles according to claim 1, characterized in that: The magnetic block (5) is a permanent magnet, and the permanent magnet is embedded on the side elevation surface (4.1) of the groove (4).

3. The steering gear power-assist housing for new energy vehicles according to claim 1, characterized in that: The housing (1) has a mounting groove extending to a position adjacent to the side elevation (4.1), and the magnetic block (5) is embedded in the mounting groove.

4. The steering gear power-assist housing for new energy vehicles according to claim 3 is characterized in that: The magnetic block (5) is an electromagnet, and a switch for controlling the on and off of power to the electromagnet is provided outside the housing (1).

5. The steering gear power-assist housing for new energy vehicles according to claim 3, characterized in that: The side elevation (4.1) is concave to form a receiving groove (6) for receiving foreign particles.

6. The steering gear power-assist housing for new energy vehicles according to claim 1, characterized in that: The housing (1) is provided with a power-assisting chamber (7) which is in communication with the shaft channel (2) and is used for mounting a power-assisting motor which is in driving connection with the transmission shaft.

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