CN219172510U - Electric power steering system and vehicle - Google Patents

Abstract

The utility model discloses an electric power steering system and a vehicle, wherein the electric power steering system comprises: a steering column; the speed reducing mechanism, speed reducing mechanism is connected with steering gear tubular column, and speed reducing mechanism includes: the worm wheel is connected with the steering gear pipe column, the first bearing is arranged in the bearing seat, the worm is connected with the first bearing, the bearing seat is of a concentric structure, the first sealing ring is arranged in the bearing seat, and the worm is connected with the worm wheel through the buffer component. According to the electric power steering system, the bearing seat in the speed reducing mechanism is designed to be of a concentric structure, so that the forming process of the bearing seat is simplified, the difficulty of the bearing seat is reduced, the structure of the bearing seat is ensured to be simpler, and the assembly with structures such as the first bearing and the worm is facilitated. Through set up first sealing washer in the bearing frame, can effectively solve the concentricity problem of worm, slow down worm vibration, can also prevent the bearing frame oil leak simultaneously.

Description

Electric power steering system and vehicle

Technical Field

The utility model relates to the technical field of vehicle steering systems, in particular to an electric power steering system and a vehicle.

Background

In the existing speed reducing mechanism of the steering system, the bearing seat is usually in an eccentric design. The bearing seat adopting eccentric design in the prior art is mainly used for adjusting the concentricity of the worm. However, the eccentric bearing seat has a complex structural design, so that the bearing seat is complex in forming process and high in forming difficulty. Meanwhile, the speed reducing structure in the prior art also has the problem of oil leakage.

Disclosure of Invention

The utility model aims to provide a novel technical scheme of an electric power steering system and a vehicle, which at least can solve the problems of complex bearing seat forming process, high forming difficulty, oil leakage and the like of a speed reducing mechanism in the prior art.

In a first aspect of the present utility model, there is provided an electric power steering system including: a steering column; a reduction mechanism connected with the steering column, the reduction mechanism comprising: the worm gear is connected with the steering gear pipe column, the first bearing is arranged in the bearing seat, the worm is connected with the first bearing, the bearing seat is of a concentric structure, the bearing seat is coaxially arranged with the worm, the first sealing ring is arranged in the bearing seat, and the worm is connected with the worm gear through the buffer assembly.

Optionally, the bearing seat is provided with a shaft hole, the shaft hole is a cylindrical hole, the shaft hole is coaxial with the worm, the first bearing is arranged in the shaft hole, and the first sealing ring is arranged in the shaft hole and connected with the first bearing.

Optionally, the first sealing ring is two annular sealing rings, and the two annular sealing rings are arranged at intervals along the radial direction of the bearing seat.

Optionally, the speed reducing mechanism further includes: the upper cover is connected with the steering gear pipe column; the nest shell, be formed with the cavity in the nest shell, output shaft and roller bearing are located in the cavity, the nest shell with the upper cover is connected, the worm, the bearing frame the first sealing washer with buffer assembly establishes on the nest shell.

Optionally, a gap is formed between the bearing seat and the nest shell, a mounting groove is formed in the bearing seat, the first sealing ring is arranged in the mounting groove, and the first sealing ring is close to the gap.

Optionally, the buffer assembly includes: the pin is connected with the first bearing; the buffer piece is arranged on the pin, and the pin is abutted against the buffer piece; and the second jackscrew is used for connecting the pin and the buffer piece.

Optionally, the buffer member is a cylindrical spring.

Optionally, the electric power steering system further includes: and the intermediate shaft is connected with the speed reducing mechanism.

Optionally, the steering column comprises: the steering column comprises an adjusting bracket, a steering column, an adjusting piece and a handle assembly, wherein the adjusting bracket is used for clamping or loosening the steering column, and first adjusting holes are respectively formed in two opposite sides of the steering column; the regulating part is worn to be established on the regulation support, just the regulating part passes first regulation hole, the regulating part includes: the first injection molding piece and the adjusting piece are integrated into a whole, and the positions of the first injection molding piece and the first adjusting hole correspond to each other; the steering column is movable relative to the adjustment member in the extending direction of the first adjustment hole with the adjustment bracket releasing the steering column.

Optionally, the steering column further comprises: the handle assembly is arranged on one side of the adjusting bracket and connected with one end of the adjusting piece, which extends out of the adjusting bracket, and the handle assembly is used for driving the clamping cavity of the adjusting bracket to clamp or loosen the steering column.

Optionally, the handle assembly comprises: the adjusting handle is connected with one end of the adjusting piece; the movable cam is connected with the adjusting handle; the cam comprises a fixed cam, wherein a plurality of protruding blocks which are distributed at intervals are arranged on one side of the fixed cam, which faces the movable cam, a plurality of matching blocks which are distributed at intervals are arranged on one side of the movable cam, which faces the fixed cam, the matching blocks are matched with the protruding blocks to connect the fixed cam with the movable cam, and the adjusting piece sequentially penetrates through the fixed cam, the movable cam and the adjusting handle.

Optionally, the handle assembly further comprises: the thrust bearing is connected with the movable cam; the first lock nut is used for connecting the thrust bearing and the adjusting handle; the first jackscrew is arranged on the lock nut.

In a second aspect of the present utility model, there is provided a vehicle including the electric power steering system described in the above embodiment.

According to the electric power steering system, the bearing seat in the speed reducing mechanism is designed to be of a concentric structure, so that the forming process of the bearing seat is simplified, the difficulty of the bearing seat is reduced, the structure of the bearing seat is ensured to be simpler, and the assembly with structures such as the first bearing and the worm is facilitated. Meanwhile, in order to adjust the concentricity of the worm, the worm is enabled to vibrate and slow down in the working process of the speed reducing mechanism, the first sealing ring is arranged in the bearing seat, the first sealing ring can play a double role in sealing and buffering in the bearing seat, the problem of the concentricity of the worm can be effectively solved by arranging the first sealing ring in the bearing seat, the vibration of the worm is slowed down, and meanwhile oil leakage of the bearing seat can be prevented. And the buffer assembly is arranged to further realize the integral buffer function of the speed reducing mechanism.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic configuration view of an electric power steering system according to an embodiment of the utility model;

fig. 2 is a structural exploded view of an electric power steering system according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a steering column in accordance with an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of an adjustment bracket and adjustment member according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of an adjusting bracket according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a steering column and an adjustment member according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of an adjusting member according to an embodiment of the present utility model;

fig. 8 is a schematic view of a structure of a movable cam according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a fixed cam according to an embodiment of the present utility model;

fig. 10 is a cross-sectional view of a reduction mechanism according to an embodiment of the present utility model;

fig. 11 is a schematic structural view of a bearing housing according to an embodiment of the present utility model.

Reference numerals:

an electric power steering system 100;

a steering column 101; a speed reducing mechanism 102;

adjusting the bracket 10; a clamping plate 11; a second adjustment aperture 12; pulling out the block 13; steel sheet 14;

a steering column 20; a column body 21; a first adjustment aperture 211; a steering shaft 22; a return spring 23; fitting connection plate 24; a snap spring 25 for a shaft; a hole clamp spring 26; a rotating bearing 27; an upper connector 28;

an adjusting member 30; a first injection-molded part 31; a second injection molding 32; an end cap 33;

an adjustment handle 41; a movable cam 42; a mating block 421; a fixed cam 43; a bump 431; a thrust bearing 44; a first lock nut 45; a first jack 46;

a worm wheel 51; a worm 52; a bearing housing 53; a mounting groove 531; a shaft hole 532; a first seal ring 54; an upper cover 55; a socket 56; a first bearing 57;

a cushioning assembly 60; a pin 61; a buffer 62; a second jack screw 63;

an input shaft 71; torsion bar 72; a torsion sensor 73; roller bearings 731; a second bearing 74; an output shaft 75; a third bearing 76; a first snap spring 77; a first adjustment sleeve 78; a buffer sleeve 79;

a second adjustment sleeve 81; a second snap spring 82; a coupling 83; a big head strap 84;

an intermediate shaft 91; a bushing 92; pin tube 93.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description and claims of the present utility model, the terms "first," "second," and the like, if any, may include one or more of those features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are referred to, the positional relationship indicated based on the drawings is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically defined and limited. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

An electric power steering system 100 according to an embodiment of the utility model is described in detail below with reference to fig. 1 to 11 of the accompanying drawings.

As shown in fig. 1 and 2, an electric power steering system 100 according to an embodiment of the utility model includes a steering column 101 and a reduction mechanism 102.

Specifically, the speed reducing mechanism 102 is connected to the steering column 101, and the speed reducing mechanism 102 includes: the worm wheel 51 is connected with the steering column 101, the first bearing 57 is arranged in the bearing seat 53, the worm 52 is connected with the first bearing 57, the bearing seat 53 is of a concentric structure, the bearing seat 53 and the worm 52 are coaxially arranged, the first sealing ring 54 is arranged in the bearing seat 53, and the worm 52 is connected with the worm wheel 51 through the buffer assembly 60.

In other words, as shown in fig. 1, the electric power steering system 100 according to the embodiment of the utility model is mainly composed of a steering column 101 and a reduction mechanism 102. As shown in fig. 2, the speed reducing mechanism 102 is connected to the steering column 101. The speed reducing mechanism 102 comprises a worm wheel 51, a worm 52, a bearing seat 53, a first bearing 57, a first sealing ring 54, a buffer assembly 60 and other structures, wherein the worm wheel 51 can be connected with a steering column 101, the first bearing 57 is arranged in the bearing seat 53, the worm 52 is connected with the first bearing 57, as shown in fig. 11, the bearing seat 53 can be designed into a concentric structure, and the concentric structure is simpler and is beneficial to assembly relative to the eccentric design of the bearing seat 53. The bearing seat 53 and the worm 52 are coaxially arranged, the first sealing ring 54 is arranged in the bearing seat 53, and the first sealing ring 54 can play a double role of sealing and buffering. The worm 52 may be connected to the worm wheel 51 by a buffer assembly 60.

According to the electric power steering system, the bearing seat 53 in the speed reducing mechanism 102 is designed to be of a concentric structure, so that the forming process of the bearing seat 53 is simplified, the difficulty of the bearing seat 53 is reduced, the structure of the bearing seat 53 is ensured to be simpler, and the assembly with the structures such as the first bearing 57, the worm 52 and the like is facilitated. Meanwhile, in order to adjust the concentricity of the worm 52, vibration of the worm 52 is slowed down in the working process of the speed reducing mechanism 102, a first sealing ring 54 is arranged in the bearing seat 53, and the first sealing ring 54 can play a double role of sealing and buffering in the bearing seat 53. Through setting up first sealing washer 54 in bearing frame 53, can effectively solve the concentricity problem of worm 52, slow down worm 52 vibration, can also prevent bearing frame 53 oil leak simultaneously. And the overall cushioning effect of the reduction mechanism 102 can be further achieved by providing the cushioning assembly 60.

According to one embodiment of the present utility model, as shown in fig. 11, the bearing housing 53 has a shaft hole, which is a cylindrical hole, so that the concentric design of the bearing housing 53 is ensured, the molding process is simplified, and the assembly and connection of the bearing housing 53 with other structures are facilitated. The shaft hole is coaxial with the worm 52, the first bearing 57 is arranged in the shaft hole, the first sealing ring 54 is arranged in the shaft hole and connected with the first bearing 57, good sealing and buffering effects are achieved, oil leakage is prevented, and meanwhile vibration can be relieved.

In the present utility model, the first sealing ring 54 may be two annular sealing rings, which may be disposed at intervals along the radial direction of the bearing seat 53, and by disposing the two annular sealing rings in the bearing seat 53, the cushioning and sealing properties of the bearing seat 53 may be further improved.

In some embodiments of the present utility model, as shown in fig. 2 and 10, the reduction mechanism 102 further includes an upper cover 55 and a socket housing 56. Wherein the upper cover 55 is connected to the steering column 101. A chamber is formed in the housing 56, the output shaft 75 and roller bearing 731 are located in the chamber, the housing 56 is connected to the upper cover 55, and the worm 52, bearing housing 53, first seal 54 and buffer assembly 60 are disposed on the housing 56. The housing 56 and the upper cover 55 may house the output shaft 75, worm 52, etc.

A gap is formed between the bearing housing 53 and the socket housing 56, referring to fig. 11, a mounting groove 531 may be provided in the bearing housing 53, a first seal ring 54 may be provided in the mounting groove 531, and the first seal ring 54 is adjacent to the gap. When the speed reducing mechanism 102 works, the first sealing ring 54 can play a double function of sealing and buffering, so that concentricity of the worm 52 is convenient to adjust, and vibration of the worm 52 is relieved in the working process of the speed reducing mechanism 102.

According to one embodiment of the utility model, see fig. 2, a first bearing 57 is provided in the bearing housing 53, the worm 52 being connected to the first bearing 57. The buffer assembly 60 comprises a pin 61, a buffer member 62 and a second jackscrew 63, wherein the pin 61 is connected with the first bearing 57, the buffer member 62 is arranged on the pin 61, the pin 61 is abutted with the buffer member 62, and the buffer member 62 is propped against to prevent clamping. The second jackscrew 63 is used for connecting the pin 61 and the buffer 62, and plays a role of fixed connection. The buffer 62 may be a cylindrical spring, which provides a good buffer. The first bearing 57 may employ a deep groove ball bearing.

In the process of buffering adjustment of the worm 52, vibration occurs in the rotation process of the worm 52, when the worm shakes, the first bearing 57 is driven to vibrate, the first bearing 57 transmits the vibration to the pin 61, the pin 61 transmits the vibration to the buffer spring (buffer piece 62), normal operation of the worm 52 can be effectively guaranteed, and overall reliability is improved.

Of course, as shown in fig. 2, the reduction mechanism 102 may further include an input shaft 71, a torsion bar 72, a torsion sensor 73, a second bearing 74, an output shaft 75, and a third bearing 76, which are connected in this order. The input shaft 71 is disposed in the upper cover 55, and the second bearing 74 and the third bearing 76 may be deep groove ball bearings, respectively. In the reduction mechanism 102, the bearing housing 53, the first bearing 57, and the worm 52 may be connected by a first clamp spring 77, a first adjustment sleeve 78, a buffer sleeve 79, a second adjustment sleeve 81, and the like. The socket shell 56 of the speed reducing mechanism 102 is also provided with a second clamp spring 82, a coupling 83, a big head hoop 84 and other structures. The first clamp spring 77 and the second clamp spring 82 can both be hole clamp springs. Of course, other structures of the reduction mechanism 102, assembly modes of the respective structures, operation principles, etc. are understood and can be implemented by those skilled in the art.

According to one embodiment of the present utility model, as shown in fig. 2, the electric power steering system 100 further includes an intermediate shaft 91, and the intermediate shaft 91 is connected to the reduction mechanism 102. The intermediate shaft 91 is connected to the socket case 56 of the reduction mechanism 102 by a bush 92, a pin tube 93, a second seal ring, a fourth bearing, a second lock nut, a fastening screw, and the like. The fourth bearing may be a deep groove ball bearing.

According to one embodiment of the present utility model, referring to fig. 2, a steering column 101 is mainly composed of an adjustment bracket 10, a steering column 20, and an adjustment member 30. Wherein the adjusting bracket 10 is provided with a clamping cavity. A portion of the steering column 20 is located in a clamping cavity through which the adjustment bracket 10 can clamp and secure the steering column 20. The steering column 20 may be provided with first adjustment holes 211 on opposite sides thereof, respectively.

As shown in fig. 2 and 4, the adjuster 30 is provided to pass through the adjuster bracket 10, and the adjuster 30 is capable of passing through the first adjuster hole 211, the adjuster 30 being connected to the adjuster bracket 10 and the steering column 20. As shown in fig. 7, the regulating member 30 includes a first injection molding member 31, the first injection molding member 31 being integrally injection molded with the regulating member 30, the first injection molding member 31 being integrated with the regulating member 30. The first injection molding member 31 may be made of a self-lubricating, wear-resistant and noise-reducing material, which may be a polyamide or nylon material, and has good self-lubricating, wear-resistant and noise-reducing effects. And is injection molded on the surface of the regulating member 30 through an injection molding process. The position of the first injection molding 31 on the adjusting member 30 corresponds to the position of the first adjusting hole 211. The adjusting piece 30 integrates functions of a plurality of parts and one part, so that the number of the parts is effectively reduced, and the assembly is convenient.

The adjustment bracket 10 is capable of clamping or unclamping the steering column 20. When the clamping chamber of the adjustment bracket 10 clamps the steering column 20, the adjustment member 30, the steering column 20, and the adjustment bracket 10 remain fixed therebetween. When the adjustment bracket 10 releases the steering column 20. At this time, during the adjustment, the steering column 20 may be pulled or pushed to move relative to the adjustment member 30 in the extending direction of the first adjustment hole 211, thereby achieving the adjustment of the steering column 20. During the movement of the steering column 20 along the first adjustment hole 211 relative to the adjustment member 30, the first injection molding member 31 on the adjustment member 30 makes relative friction or collision with the wall of the first adjustment hole 211 of the steering column 20. Because the first injection molding piece 31 adopts self-lubricating, wear-resistant and noise-reducing materials, the purpose of noise reduction can be achieved, and smooth and quiet adjustment process is ensured.

According to the utility model, the first injection molding piece 31 is injected on the adjusting piece 30, the self-lubricating, wear-resistant and noise-reducing material is directly injected on the adjusting piece 30, and the adjustment of the steering column 20 can be realized by utilizing the movement of the first adjusting hole 211 on the steering column 20 relative to the adjusting piece 30, so that the number of parts used is effectively reduced, the assembly is simple, the adjustment is simple and convenient, and the cost and the failure rate are reduced.

As shown in fig. 2, the reduction mechanism 102 is connected to the steering column 20. The steering column 20 is mainly composed of a column body 21 and a steering shaft 22. Wherein, the tubular column body 21 is provided with an installation cavity therein, and the tubular column body 21 is provided with a first adjusting hole 211. A portion of the steering shaft 22 is disposed within the mounting cavity and another portion of the steering shaft 22 extends out of the mounting cavity. The steering shaft 22 is rotatable relative to the column body 21, and the steering shaft 22 is connected to the column body 21 by a rotation bearing 27, a shaft clamp spring 25, a hole clamp spring 26, or the like. The column body 21 may be provided with an upper coupling 28 for coupling with an external structure. The reduction mechanism 102 is connected to the steering shaft 22 to adjust the rotational speed of the steering shaft 22. The steering gear pipe column 101 is also provided with structures such as a return spring 23, an accessory connecting plate 24 and the like, one end of the return spring 23 is connected with the accessory connecting plate 24, and the other end of the return spring can be arranged on the adjusting bracket 10, so that an elastic return function is realized.

According to one embodiment of the present utility model, the adjusting member 30 is an adjusting screw, the circumferential surface of the adjusting screw is provided with a groove extending along the axial direction of the adjusting screw, the extending length of the groove is not smaller than the distance between two opposite first adjusting holes 211 on the steering column 20, and the groove is injection-molded with a first injection-molded member 31.

That is, as shown in fig. 2, 6 and 7, the adjusting member 30 may employ an adjusting screw, a groove is provided on the circumferential surface of the adjusting screw, the groove may extend in the axial direction of the adjusting screw, and the extending length of the groove is not smaller than the distance between the two opposite first adjusting holes 211 on the steering column 20, ensuring that the positions of the two first adjusting holes 211 can correspond to the positions of the groove. The first injection molding piece 31 made of self-lubricating, wear-resistant and noise-reducing materials is injected on the groove of the adjusting screw by adopting an injection molding process. The shape of the outer peripheral surface of the first injection molding 31 and the shape of the outer peripheral surface of the regulator 30 may correspond to each other. By injection-molding the first injection-molded member 31 onto the groove, the first injection-molded member 31 can also be prevented from moving in the axial direction of the regulating member 30.

In some embodiments of the present utility model, two grooves are formed on the circumferential surface of the adjusting screw, and each groove corresponds to the position of one first adjusting hole 211, and is respectively injection-molded with a first injection molding member 31.

In other words, as shown in fig. 7, two grooves may be provided on the circumferential surface of the adjusting screw, and each groove may be located at a position corresponding to a position of one of the first adjusting holes 211, respectively. Each groove is respectively provided with a first injection molding piece 31 made of self-lubricating, wear-resistant and noise-reducing materials. By providing the first injection molding 31 at a position directly corresponding to the two first adjustment holes 211, the material consumption of the injection molding can be reduced. At the same time, the axial length of each first injection-molded part 31 is relatively shorter, so that the stability of the connection of the first injection-molded parts 31 to the adjusting part 30 can be further improved.

According to one embodiment of the utility model, the steering column 101 further comprises: and a handle assembly provided on one side of the adjustment bracket 10, the handle assembly being connected to one end of the adjustment member 30 extending out of the adjustment bracket 10, the handle assembly being used to drive the clamping chamber of the adjustment bracket 10 to clamp or unclamp the steering column 20.

That is, as shown in fig. 2 and 3, a handle assembly is provided on one side of the adjustment bracket 10, the handle assembly being connected to one end of the adjustment member 30 protruding from the adjustment bracket 10. The handle assembly is capable of actuating the clamping chamber of the adjustment bracket 10 to clamp or unclamp the steering column 20. When the handle assembly is rotated in a counterclockwise direction or rotated upward, the handle assembly may drive the clamping chamber of the adjustment bracket 10 to clamp the steering column 20, maintaining a fixed state between the adjustment member 30, the steering column 20, and the adjustment bracket 10.

When the handle assembly is rotated in a clockwise direction or rotated downward, the handle assembly may actuate the deployment of the gripping chamber of the adjustment bracket 10, which adjusts the bracket 10 to release the steering column 20. At this time, during the adjustment, the steering column 20 may be pulled or pushed to move relative to the adjustment member 30 in the extending direction of the first adjustment hole 211, thereby achieving the adjustment of the steering column 20. During the movement of the steering column 20 along the first adjustment hole 211 relative to the adjustment member 30, the first injection molding member 31 on the adjustment member 30 makes relative friction or collision with the wall of the first adjustment hole 211 of the steering column 20. Because the first injection molding piece 31 adopts self-lubricating, wear-resistant and noise-reducing materials, the purpose of noise reduction can be achieved, and smooth and quiet adjustment process is ensured.

According to an embodiment of the present utility model, as shown in fig. 4 and 5, the opposite sides of the adjusting bracket 10 are respectively provided with the second adjusting hole 12 communicating with the clamping cavity, the second adjusting hole 12 is different from the extending direction of the first adjusting hole 211, the adjusting piece 30 passes through the first adjusting hole 211 and the second adjusting hole 12, and the adjusting piece 30 drives the steering column 20 to be movable along the extending direction of the second adjusting hole 12 under the condition that the adjusting bracket 10 releases the steering column 20.

That is, referring to fig. 4 and 5, the adjustment bracket 10 includes two clamping plates 11 defining a clamping chamber therebetween, and each clamping plate 11 is provided with a second adjustment hole 12 communicating with the clamping chamber. The second adjustment hole 12 is different from the first adjustment hole 211 in the extending direction, ensuring that the steering column 20 can be adjusted in different directions. The adjustment member 30 passes through the first adjustment hole 211 and the second adjustment hole 12. In the case where the adjustment bracket 10 releases the steering column 20, the adjustment member 30 may move in the extending direction of the second adjustment hole 12, thereby driving the steering column 20 to move in the extending direction of the second adjustment hole 12, and achieving adjustment of the steering column 20 in different directions.

According to one embodiment of the utility model, the end of the adjustment member 30 remote from the handle assembly is provided with an end cap 33, the end cap 33 being injection molded with a second injection molded part 32, the second injection molded part 32 corresponding to the position of the second adjustment aperture 12.

In other words, as shown in fig. 7, an end cap 33 is disposed at an end of the adjusting member 30 away from the handle assembly, and a second injection molding member 32 may be injection molded on the end cap 33, and the second injection molding member 32 and the first injection molding member 31 may be made of the same material, and have self-lubrication, wear resistance and noise reduction properties. The adjusting piece 30 integrates functions of a plurality of parts and one part, so that the number of the parts is effectively reduced, and the assembly is convenient. The second injection-molded member 32 may be injection-molded to the inner side of the end cap 33, or the second injection-molded member 32 may be wrapped around the peripheral surface of the end cap 33. The second injection molding piece 32 corresponds to the position of the second adjusting hole 12, when the adjusting bracket 10 loosens the steering column 20, the adjusting piece 30 can move in the second adjusting hole 12, the second injection molding piece 32 rubs or collides with the hole wall of the second adjusting hole 12 of the adjusting bracket 10, the purpose of noise reduction is achieved, and smooth and quiet movement of the adjusting piece 30 in the second adjusting hole 12 is ensured.

In some embodiments of the present utility model, the first adjustment hole 211 is an elongated hole extending along an axial direction of the steering column 20, the steering column 20 is telescopically adjusted relative to the adjusting member 30 along an extending direction of the first adjustment hole 211, an included angle is formed between an extension line of the extending direction of the second adjustment hole 12 and an extension line of the extending direction of the first adjustment hole 211, and the adjusting member 30 drives the steering column 20 to swing and adjust along the extending direction of the second adjustment hole 12.

That is, as shown in fig. 5 and 6, both the first and second adjustment holes 211 and 12 may be provided as elongated holes. Wherein the first adjustment hole 211 may extend in an axial direction of the steering column 20. The steering column 20 is telescopically adjustable relative to the adjuster 30 in the extending direction of the first adjustment hole 211. An angle is formed between an extension line of the second adjustment hole 12 in the extending direction and an extension line of the first adjustment hole 211 in the extending direction. For example, the second adjustment hole 12 may extend substantially in a radial direction of the steering column 20, and the adjuster 30 may cause the steering column 20 to oscillate in the direction in which the second adjustment hole 12 extends. By the cooperation of the adjusting member 30 with the first adjusting hole 211 and the second adjusting hole 12, telescopic adjustment and swinging adjustment of the steering column 20 can be achieved.

According to one embodiment of the present utility model, referring to fig. 2 and 3, the handle assembly includes an adjustment handle 41, a movable cam 42, and a fixed cam 43. Wherein the adjustment handle 41 is connected to one end of the adjustment member 30. The movable cam 42 is connected to the adjustment handle 41. The fixed cam 43 is connected to the movable cam 42, and the adjuster 30 sequentially passes through the fixed cam 43, the movable cam 42, and the adjustment handle 41. As shown in fig. 8 and 9, the side of the fixed cam 43 facing the movable cam 42 is provided with a plurality of projections 431 spaced apart, and the side of the movable cam 42 facing the fixed cam 43 is provided with a plurality of engaging blocks 421 spaced apart, the engaging blocks 421 being engaged with the projections 431. The fixed cam 43 is pushed to move by the mutual pressing of the projection 431 and the fitting block 421 to drive the adjustment bracket 10 to clamp or unclamp the steering column 20. The utility model optimizes the structures of the fixed cam 43 and the movable cam 42, and is easier to process.

The handle assembly further includes a thrust bearing 44, a first lock nut 45 and a first jackscrew 46. Wherein a thrust bearing 44 is coupled to the movable cam 42. A first lock nut 45 is used to connect the thrust bearing 44 and the adjustment handle 41. The first jackscrew 46 may be secured to the adjustment handle 41 through a lock nut. The secondary fixing can be performed by providing the first jackscrew 46, and the jackscrew is light in weight, low in cost and more reliable in fixing. The handle assembly, the adjusting bracket 10, the steering column 20 and other structures such as a pull-out block 13, a steel sheet 14 and the like can be further arranged among the handle assembly, the adjusting bracket 10 and the steering column 20.

When the adjustment hand rotates upward, the movable cam 42 slides relative to the fixed cam 43, forcing the fixed cam 43 to move toward the adjustment bracket 10, driving the adjustment bracket 10 to clamp the steering column 20, and connecting and fixing the adjustment member 30, the steering column 20, and the adjustment bracket 10.

When the adjustment handle 41 is rotated downward, the movable cam 42 slides relative to the fixed cam 43, forcing the fixed cam 43 to move away from the adjustment bracket 10, and the adjustment bracket 10 releases the steering column 20, allowing telescopic and swinging adjustment of the steering column 20 relative to the adjustment bracket 10. In the telescopic adjustment process, the upper steering shaft 22 is pulled or pushed, and the steering shaft 22 drives the pipe column body 21 to move, so that the first adjusting hole 211 in the pipe column body 21 moves telescopically relative to the adjusting piece 30 along the first adjusting hole 211. When the pipe column body 21 slides relative to the adjusting piece 30, the first injection molding piece 31 on the adjusting piece 30 and the first adjusting hole 211 of the pipe column body 21 are rubbed and collided relatively, and the first injection molding piece 31 has the characteristics of self lubrication, noise reduction and wear resistance, so that smooth and quiet telescopic adjusting process can be effectively ensured.

In the swing adjusting process, the steering column 20 can drive the adjusting piece 30 to move along the second adjusting hole 12 of the adjusting bracket 10, when the adjusting piece 30 slides relative to the second adjusting hole 12, the second injection molding piece 32 on the adjusting piece 30 and the second adjusting hole 12 of the adjusting bracket 10 rub and collide relatively, and the second injection molding piece 32 has the characteristics of self lubrication, noise reduction and wear resistance, so that the swing adjusting process can be effectively ensured to be smooth and quiet.

In summary, according to the electric power steering system 100 of the embodiment of the present utility model, by designing the bearing housing 53 in the reduction mechanism 102 to have a concentric structure, the forming process of the bearing housing 53 is simplified, the difficulty of the bearing housing 53 is reduced, the structure of the bearing housing 53 is ensured to be simpler, and the assembly with the structures such as the first bearing 57 and the worm 52 is facilitated. Meanwhile, in order to adjust the concentricity of the worm 52, vibration of the worm 52 is slowed down in the working process of the speed reducing mechanism 102, a first sealing ring 54 is arranged in the bearing seat 53, and the first sealing ring 54 can play a double role of sealing and buffering in the bearing seat 53. Through setting up first sealing washer 54 in bearing frame 53, can effectively solve the concentricity problem of worm 52, slow down worm 52 vibration, can also prevent bearing frame 53 oil leak simultaneously. And the overall cushioning effect of the reduction mechanism 102 can be further achieved by providing the cushioning assembly 60.

Of course, other structures of the electric power steering system 100 and the operation principle thereof are understood and can be implemented by those skilled in the art, and detailed descriptions thereof are omitted herein.

According to a second aspect of the present utility model, there is provided a vehicle including the electric power steering system 100 of the above-described embodiment. Since the electric power steering system 100 according to the embodiment of the present utility model has the above technical effects, the vehicle according to the embodiment of the present utility model should also have the corresponding technical effects, that is, the vehicle according to the present utility model can simplify the process, facilitate the assembly of parts, and achieve good noise reduction, buffering, and sealing effects by adopting the electric power steering system 100.

Of course, other structures of the vehicle and its working principle are understood and can be implemented by those skilled in the art, and detailed description thereof is omitted herein.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (13)

1. An electric power steering system, comprising:

a steering column;

a reduction mechanism connected with the steering column, the reduction mechanism comprising: the worm gear is connected with the steering gear pipe column, the first bearing is arranged in the bearing seat, the worm is connected with the first bearing, the bearing seat is of a concentric structure, the bearing seat is coaxially arranged with the worm, the first sealing ring is arranged in the bearing seat, and the worm is connected with the worm gear through the buffer assembly.

2. The electric power steering system of claim 1, wherein the bearing housing has a shaft bore, the shaft bore being a cylindrical bore, the shaft bore being coaxial with the worm, the first bearing being disposed within the shaft bore, the first seal ring being disposed within the shaft bore and connected to the first bearing.

3. The electric power steering system of claim 1, wherein the first seal ring is two ring-shaped seal rings, the two ring-shaped seal rings being disposed at a radial interval along the bearing housing.

4. The electric power steering system according to claim 1, wherein the reduction mechanism further includes:

the upper cover is connected with the steering gear pipe column;

the nest shell is internally provided with a cavity, the nest shell is connected with the upper cover, and the worm, the bearing seat, the first sealing ring and the buffer component are arranged on the nest shell.

5. The electric power steering system of claim 4, wherein a gap is formed between the bearing housing and the socket housing, a mounting groove is formed in the bearing housing, the first seal ring is disposed in the mounting groove, and the first seal ring is adjacent to the gap.

6. The electric power steering system of claim 5, wherein the buffer assembly comprises:

the pin is connected with the first bearing;

the buffer piece is arranged on the pin, and the pin is abutted against the buffer piece;

and the second jackscrew is used for connecting the pin and the buffer piece.

7. The electric power steering system of claim 6, wherein the cushion member is a cylindrical spring.

8. The electric power steering system according to claim 1, characterized by further comprising: and the intermediate shaft is connected with the speed reducing mechanism.

9. The electric power steering system of claim 1, wherein the steering column comprises: the device comprises an adjusting bracket, a steering column and an adjusting piece, wherein the adjusting bracket is used for clamping or loosening the steering column, and first adjusting holes are respectively formed in two opposite sides of the steering column; the regulating part is worn to be established on the regulation support, just the regulating part passes first regulation hole, the regulating part includes: the first injection molding piece and the adjusting piece are integrated into a whole, and the positions of the first injection molding piece and the first adjusting hole correspond to each other; the steering column is movable relative to the adjustment member in the extending direction of the first adjustment hole with the adjustment bracket releasing the steering column.

10. The electric power steering system of claim 9, wherein the steering column further comprises: the handle assembly is arranged on one side of the adjusting bracket and connected with one end of the adjusting piece, which extends out of the adjusting bracket, and the handle assembly is used for driving the adjusting bracket to clamp or loosen the steering column.

11. The electric power steering system of claim 10, wherein the handle assembly comprises:

the adjusting handle is connected with one end of the adjusting piece;

the movable cam is connected with the adjusting handle;

the cam comprises a fixed cam, wherein a plurality of protruding blocks which are distributed at intervals are arranged on one side of the fixed cam, which faces the movable cam, a plurality of matching blocks which are distributed at intervals are arranged on one side of the movable cam, which faces the fixed cam, the matching blocks are matched with the protruding blocks to connect the fixed cam with the movable cam, and the adjusting piece sequentially penetrates through the fixed cam, the movable cam and the adjusting handle.

12. The electric power steering system of claim 11, wherein the handle assembly further comprises:

the thrust bearing is connected with the movable cam;

the first lock nut is used for connecting the thrust bearing and the adjusting handle;

the first jackscrew is arranged on the lock nut.

13. A vehicle comprising an electric power steering system as claimed in any one of claims 1 to 12.

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