Power-assisted shell assembly for new energy vehicle

Abstract

The utility model discloses a power-assisted shell assembly for a new energy vehicle, which comprises a worm wheel loading shell, a worm loading shell and a motor end cover shell which are integrally formed, a worm wheel upper cover is arranged on the worm wheel loading shell, a worm wheel cavity is arranged in the worm wheel loading shell, a worm cavity is arranged in the worm loading shell, and a motor end cover is arranged on the worm wheel upper cover. The motor end cover shell is arranged at one end of the worm loading shell, a cable through hole is formed in the motor end cover shell in a penetrating mode, a fixing boss is arranged on the portion, at the outer end of the cable through hole, of the motor end cover shell, and a plurality of butt joint protruding blocks protruding outwards in the axial direction of the fixing boss are arranged at the end, away from the motor end cover shell, of the fixing boss. An alignment bayonet used for clamping a cable waterproof connector in a matched mode is formed between every two adjacent butt-joint protruding blocks, the outer side wall of each butt-joint protruding block is provided with an arc-shaped clamping groove extending in the circumferential direction of the fixing boss, and the multiple arc-shaped clamping grooves are loaded with elastic ferrules in a matched mode so that the cable waterproof connector can be hooped in the side direction. The stability of installing the cable waterproof joint on the cable through hole is improved, and the cable waterproof joint is not easy to loosen.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts and components, and in particular to a power-assisting housing component for a new energy vehicle. Background Art

[0002] With the rapid development of the new energy vehicle industry, especially the popularization and application of intelligent assisted driving and automatic driving scenarios of new energy vehicles, the requirements for the performance of steering gears are getting higher and higher. Electric Power Steering (EPS) is a high-tech automotive steering device that is energy-saving, safe, and environmentally friendly. EPS has become one of the key technologies for global automotive product competition. EPS has a compact structure, is easy to assemble and maintain, and has good integration. EPS is the best choice for steering systems for pure electric vehicles (EVs) and hybrid electric vehicles (HEVs).

[0003] Both pinion electric power steering (PEPS) and column electric power steering (CEPS) require the use of worm gear reduction devices. In this type of electric power steering, the worm gear meshing transmission mainly plays the role of deceleration and torque transmission, while the housing assembly used to load the worm gear and the power steering motor needs to be designed with lightweight, high strength, waterproof and dustproof characteristics. The end cover housing of the power housing used to load the power steering motor is sometimes designed with cable through holes for passing cables, which is convenient for loading components such as motor speed sensors inside the housing.

[0004] The applicant discovered during the long-term production and development of the power-assist housing that the power-assist housing for new energy vehicles has high requirements for the safety and stability of electronic cables and electronic control components, and therefore needs to be designed to be waterproof and dustproof. The cable through-hole will be adapted to fix the cable waterproof connector during later assembly, but follow-up research has found that the shell structure design at the cable through-hole on the power-assist housing in the existing design is still simple, and there is a certain risk of the cable waterproof connector loosening after the car has been running for a long time, so it is urgent to make targeted improvements to the power-assist housing structure. Utility Model Content

[0005] The purpose of the utility model is to solve one of the technical problems in the related art to a certain extent at least. In view of this, a power-assisting housing assembly for a new energy vehicle is provided, including an integrally formed worm gear loading housing, a worm screw loading housing and a motor end cover housing. A worm gear upper cover is detachably mounted on the worm gear loading housing. A worm gear cavity for loading a worm gear is provided in the worm gear loading housing. A worm screw cavity for loading a worm screw and communicating with the worm gear cavity is provided in the worm screw loading housing. The motor end cover housing is provided at one end of the worm screw loading housing and is coaxially arranged with the worm screw cavity. The motor end cover shell is provided with a cable through hole, and a fixing boss for adapting and fixing the cable waterproof connector is provided on the motor end cover shell at the outer end of the cable through hole, and a plurality of docking bosses protruding outward along the axial direction of the fixing boss are provided at the end of the fixing boss away from the motor end cover shell, and a positioning bayonet for adapting and clamping the cable waterproof connector is provided between two adjacent docking bosses, and an arc-shaped card groove extending along the circumference of the fixing boss is provided on the outer side wall of each docking boss, and a plurality of the arc-shaped card grooves are adapted to be loaded with elastic rings to laterally tighten the cable waterproof connector.

[0006] According to an example of the utility model, a probe mounting hole is formed on the side wall of the worm gear loading shell for installing a sensing probe for sensing worm gear parameters, an avoidance groove is formed on the inner wall of the worm gear loading shell, and one end of the probe mounting hole extending into the interior of the worm gear loading shell is located at the bottom of the avoidance groove.

[0007] According to an example of the utility model, an elastic clamping groove is provided on the worm gear loading housing at the bottom of the middle section of the probe mounting hole, and an elastic clamping block is installed in the elastic clamping groove to laterally compress the sensing probe.

[0008] According to an example of the utility model, a stop groove is provided on the inner wall of the worm gear loading housing, and the stop groove extends from the opening of the worm gear cavity along the axial direction of the worm gear loading housing toward the middle of the worm gear cavity.

[0009] According to an example of the utility model, a sealing groove is provided on the end surface of the worm gear loading housing for adapting to the loading annular sealing ring.

[0010] According to an example of the utility model, two motor end cover fastening holes are oppositely arranged on the motor end cover housing, and a first weight-reducing groove is arranged beside the motor end cover fastening hole.

[0011] According to an example of the utility model, a plurality of end fastening holes are provided at one end of the worm gear loading housing away from the worm gear upper cover, and a second weight-reducing groove is provided beside the end fastening holes.

[0012] Compared with the prior art, the technical solution of the utility model has the following advantages: by improving the power-assisted housing assembly for new energy vehicles, specifically when optimizing the waterproof structure at the cable through-hole, a fixed boss is designed at the outer end of the motor end cover housing at the cable through-hole, and the fixed boss has a docking protrusion and an alignment bayonet at the end for clamping the cable waterproof connector, and an arc-shaped groove is synchronously provided on the peripheral side of the fixed boss for cooperating with an elastic ring to assist in fixing the cable waterproof connector, thereby improving the stability of the cable waterproof connector after being installed on the cable through-hole and preventing it from loosening easily.

[0013] 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

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a structural diagram of a power-assisting housing assembly for a new energy vehicle according to an embodiment of the utility model.

[0016] Figure 2 It is an exploded structural diagram of a power-assisting housing assembly for a new energy vehicle according to an embodiment of the utility model.

[0017] Figure 3 This is a first orientation structural diagram of the housing assembly after the worm gear upper cover is removed according to an embodiment of the utility model.

[0018] Figure 4 yes Figure 3 A-part enlarged structure diagram.

[0019] Figure 5 yes Figure 3 Enlarged structural diagram of part B.

[0020] Figure 6 This is a second orientation structural diagram of the housing assembly after the worm gear upper cover is removed according to an embodiment of the utility model.

[0021] Figure 7 yes Figure 6 Enlarged structure diagram of part C.

[0022] Figure 8 It is a third-position structural diagram of the housing assembly after the worm gear upper cover is removed according to an embodiment of the utility model.

[0023] Fig. 9It is a structural diagram of the elastic card block of the embodiment of the utility model.

[0024] Among them, the figure markings are: 1. worm gear loading housing, 2. worm screw loading housing, 3. motor end cover housing, 4. worm gear upper cover, 5. worm gear cavity, 6. worm screw cavity, 7. cable through hole, 8. fixing boss, 9. docking protrusion, 10. alignment bayonet, 11. arc-shaped slot, 12. probe mounting hole, 13. avoidance groove, 14. elastic clamping groove, 15. elastic clamping block, 16. stop groove, 17. sealing slot, 18. motor end cover fastening hole, 19. first weight reduction groove, 20. end fastening hole, 21. second weight reduction groove. DETAILED DESCRIPTION

[0025] 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. Example

[0026] See also Figure 1 to Figure 9 As shown, the utility model provides a power-assisting housing assembly for a new energy vehicle, including an integrally formed worm gear loading housing 1, a worm screw loading housing 2 and a motor end cover housing 3. A worm gear upper cover 4 is detachably mounted on the worm gear loading housing 1. A worm gear cavity 5 for loading a worm gear is provided in the worm gear loading housing 2. A worm screw cavity 6 for loading a worm screw and communicating with the worm gear cavity 5 is provided in the worm screw loading housing 2. The motor end cover housing 3 is arranged at one end of the worm screw loading housing 2 and is coaxially arranged with the worm screw cavity 6. A cable through hole is penetrated through the motor end cover housing 3. 7. A fixing boss 8 for fitting and fixing the cable waterproof connector is provided on the motor end cover housing 3 at the outer end of the cable through hole 7. A plurality of docking protrusions 9 protruding outwardly along the axial direction of the fixing boss 8 are provided at one end of the fixing boss 8 away from the motor end cover housing 3. A positioning bayonet 10 for fitting and clamping the cable waterproof connector is provided between two adjacent docking protrusions 9. An arc-shaped card groove 11 extending along the circumferential direction of the fixing boss 8 is provided on the outer side wall of each docking protrusion 9. The plurality of arc-shaped card grooves 11 are adapted to be loaded with elastic rings to laterally clamp the cable waterproof connector.

[0027] In the present embodiment, by improving the power-assist housing assembly for new energy vehicles, specifically when optimizing the waterproof structure at the cable through hole 7, a fixed boss 8 is designed at the outer end of the motor end cover housing 3 at the cable through hole 7. The fixed boss 8 has a docking protrusion 9 and an alignment bayonet 10 adapted to clamp the cable waterproof connector at the end, and an arc-shaped groove 11 is synchronously provided on the peripheral side of the fixed boss 8 for assisting in fixing the cable waterproof connector with an elastic ring. The connector is assisted in fixing in two dimensions, namely, the end side and the outer peripheral side wall, thereby improving the stability of the cable waterproof connector after being installed on the cable through hole and preventing it from loosening easily.

[0028] According to an example of the utility model, a probe mounting hole 12 is provided on the side wall of the worm gear loading housing 1 for mounting a sensing probe for sensing worm gear parameters, and an avoidance groove 13 is provided on the inner wall of the worm gear loading housing 1, and one end of the probe mounting hole 12 extending into the interior of the worm gear loading housing 1 is located at the bottom of the avoidance groove 13. The avoidance groove 13 is designed to accommodate the end portion of the sensing probe extending into the inner side of the housing, and to reduce the circumferential shielding of the end of the probe, which can improve the sensing accuracy of the probe to a certain extent.

[0029] According to an example of the utility model, an elastic clamping groove 14 is provided on the worm gear loading housing 1 at the bottom of the middle section of the probe mounting hole 12, and an elastic clamping block 15 is installed in the elastic clamping groove 14 to laterally compress the sensing probe. Specifically, the elastic clamping groove 14 can be a waist-shaped groove, and two spring limit grooves are arranged at intervals in the groove. Correspondingly, the elastic clamping block 15 has a clamping block with a trapezoidal longitudinal section. Two springs arranged relatively to be elastically clamped into the elastic limit groove are installed at the bottom of the clamping block. When the sensing probe is inserted into the probe mounting hole 12, the clamping block is squeezed to move into the elastic clamping groove 14. After the sensing probe is installed in place, the clamping block is subjected to the elastic squeezing force of the spring, and the clamping block gives a lateral pressing force to the sensing probe from the bottom, which can improve the stability of the probe after installation and prevent the sensing accuracy problem caused by the loosening of the probe.

[0030] According to an example of the present invention, a stop groove 16 is provided on the inner wall of the worm gear housing 1, and the stop groove 16 extends from the opening of the worm gear cavity 5 along the axial direction of the worm gear housing 1 to the middle of the worm gear cavity 5. The stop groove 16 is designed to limit the guide when the worm gear is installed, so as to prevent the worm gear from swinging abnormally after being installed in the worm gear housing 1.

[0031] According to an example of the utility model, a sealing groove 17 is provided on the end face of the worm gear loading housing 1 for adapting a loading annular sealing ring to perform annular sealing on the end face connection part of the worm gear loading housing 1 to improve dustproof and waterproof performance.

[0032] According to an example of the utility model, two motor end cover fastening holes 18 are oppositely arranged on the motor end cover housing 3, and a first weight reduction groove 19 is arranged beside the motor end cover fastening hole 18. A plurality of end fastening holes 20 are arranged at one end of the worm gear loading housing 2 away from the worm gear upper cover 4, and a second weight reduction groove 21 is arranged beside the end fastening hole 20.

[0033] Among them, the motor end cover fastening hole 18 is used to cooperate with the fasteners to fix the motor end cover housing 3, and the end fastening hole 20 is used to cooperate with the fasteners to fix the worm gear loading housing 2. The setting of the two weight-reducing grooves is to carry out multi-point lightweight design of the entire power-assisting housing assembly, save costs and reduce counterweight.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] 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.

[0037] 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 power-assisting housing assembly for a new energy vehicle, comprising an integrally formed worm gear loading housing, a worm screw loading housing and a motor end cover housing, wherein a worm gear upper cover is detachably mounted on the worm gear loading housing, a worm gear cavity for loading a worm gear is provided in the worm gear loading housing, a worm screw cavity for loading a worm screw and communicating with the worm gear cavity is provided in the worm screw loading housing, and the motor end cover housing is arranged at one end of the worm screw loading housing and is coaxially arranged with the worm screw cavity, characterized in that: The motor end cover shell is provided with a cable through hole, and a fixing boss for adapting and fixing the cable waterproof connector is provided on the motor end cover shell at the outer end of the cable through hole, and a plurality of docking bosses protruding outward along the axial direction of the fixing boss are provided at the end of the fixing boss away from the motor end cover shell, and a positioning bayonet for adapting and clamping the cable waterproof connector is provided between two adjacent docking bosses, and an arc-shaped groove extending along the circumference of the fixing boss is provided on the outer side wall of each docking boss, and a plurality of the arc-shaped grooves are adapted to be loaded with elastic rings to laterally clamp the cable waterproof connector.

2. A power-assisting housing assembly for a new energy vehicle according to claim 1, characterized in that: A probe mounting hole is formed on the side wall of the worm gear loading housing for mounting a sensing probe for sensing worm gear parameters. An avoidance groove is formed on the inner wall of the worm gear loading housing. One end of the probe mounting hole extending into the interior of the worm gear loading housing is located at the bottom of the avoidance groove.

3. A power-assisting housing assembly for a new energy vehicle according to claim 2, characterized in that: An elastic clamping groove is provided on the worm gear loading housing at the bottom of the middle section of the probe installation hole, and an elastic clamping block is installed in the elastic clamping groove to laterally compress the sensing probe.

4. A power-assisting housing assembly for a new energy vehicle according to claim 1, characterized in that: A stop groove is arranged on the inner wall of the worm gear loading housing, and the stop groove extends from the opening of the worm gear cavity along the axial direction of the worm gear loading housing toward the middle of the worm gear cavity.

5. The power-assist housing assembly for new energy vehicles according to claim 1, characterized in that: A sealing groove is provided on the end surface of the worm gear loading housing for fitting a loading annular sealing ring.

6. The power-assisting housing assembly for a new energy vehicle according to claim 1, characterized in that: The motor end cover housing is provided with two motor end cover fastening holes opposite to each other, and a first weight-reducing groove is provided beside the motor end cover fastening holes.

7. The power-assisting housing assembly for a new energy vehicle according to claim 1, characterized in that: A plurality of end fastening holes are arranged at one end of the worm gear loading housing away from the worm gear upper cover, and a second weight-reducing groove is arranged beside the end fastening holes.

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