CN214356230U - Shaft connection clearance self-adaptive compensation device, steering column assembly and automobile - Google Patents

Abstract

The utility model discloses an axle is with hookup clearance self-adaptation compensation arrangement, steering column assembly and car, wherein, axle is with hookup clearance self-adaptation compensation arrangement includes: the worm shaft is provided with a blind hole along the axial direction; the elastic piece is positioned inside the blind hole; the motor output shaft is provided with a connecting end part and can be inserted into the blind hole; and the bolt is provided with a groove matched with the connecting end part, and the diameter of the bolt is smaller than that of the blind hole and is used for extruding the elastic piece. The self-adaptive compensation device for the coupling clearance for the shaft provided by the utility model can automatically compensate the clearance when the worm and gear have clearance, namely, the clearance is self-adaptively adjusted; in addition, the self-adaptive compensation device for the coupling clearance for the shaft has the advantages of simple structure, convenience in assembly, simplicity in manufacturing, low manufacturing cost, easiness in guaranteeing the precision requirement and wide application range.

Description

Shaft connection clearance self-adaptive compensation device, steering column assembly and automobile

Technical Field

The utility model relates to an automobile parts technical field especially relates to an axle is with hookup clearance self-adaptation compensation arrangement, steering column assembly and car.

Background

With the improvement of life quality, the requirements of people on the safety, stability and comfort of automobiles are higher and higher. The worm gear reduction gears of car can appear the unfavorable condition in worm gear meshing clearance, and this kind of meshing clearance makes navigating mate operation feel uncomfortable, and light time is heavy when driving and feeling, and the car is at high-speed driving in-process, and this stability and the security that will directly influence the car manipulation.

The driver is based on the demand to driving comfort, and it is smooth-going to feel when requiring the car to turn to promptly, so steering column assembly motor output shaft and worm design are the flexible shaft coupling and worm gear clearance can be adjusted for the worm.

The traditional connection mode is that a spherical bearing is adopted for connection, so that a worm shaft can rotate around the spherical center of the spherical bearing, and the position of a worm is adjusted to ensure that the clearance between the worm and the worm gear is adjusted. However, there are several disadvantages to using this connection: the spherical bearing has a complex structure and is inconvenient to assemble; the processing technology is complex and the precision requirement is difficult to guarantee; the processing and manufacturing cost is high, so that the cost of a single piece is high; furthermore, the wear of the worm gears, which is durable, cannot be adapted to compensate for their play, which can cause abnormal noise and performance degradation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcome prior art in the defect to a simple structure, can self-adaptation adjustment clearance for the axle hookup clearance self-adaptation compensation arrangement is provided, and this axle hookup clearance self-adaptation compensation arrangement low in manufacturing cost, the assembly of being convenient for.

Another object of the present invention is to overcome the drawbacks of the prior art, and to provide a steering column assembly including the coupling gap adaptive compensating apparatus for a shaft.

It is a further object of the present invention to overcome the above-mentioned drawbacks of the prior art, and to provide a vehicle including the coupling gap adaptive compensation apparatus for an axle.

In order to achieve the above object, the present invention provides the following technical solutions:

a coupling clearance adaptive compensation device for a shaft comprises: the worm shaft is provided with a blind hole along the axial direction; the elastic piece is positioned inside the blind hole; the motor output shaft is provided with a connecting end part and can be inserted into the blind hole; and the bolt is provided with a groove matched with the connecting end part, and the diameter of the bolt is smaller than that of the blind hole and is used for extruding the elastic piece.

As an implementable manner, the connecting end portion has a convex spherical surface, and the groove has a concave spherical surface fitted with the convex spherical surface.

As an implementable manner, the elastic member is a spring.

As an implementable manner, the latch is of a convex type with a projection inserted inside the spring.

As an implementation manner, the bolt is provided with at least one opening along the axial direction for radially expanding the bolt.

As an implementable manner, the spring is fixedly connected to the bottom of the blind hole.

As an implementable manner, the spring is fixedly connected to the plug.

A steering column assembly is provided with the self-adaptive compensation device for the coupling clearance for the shaft.

An automobile is provided with the steering column assembly.

Compared with the prior art, the utility model provides an axle is with hookup clearance self-adaptation compensation arrangement has following beneficial effect:

the utility model provides a coupling clearance self-adaptation compensation arrangement is used to axle mainly comprises worm axle, elastic component, motor output shaft and bolt. The worm shaft is provided with a blind hole, an elastic piece is placed in the blind hole, the motor output shaft is provided with a connecting end part, the groove of the bolt is matched with the connecting end part, the connecting end part and the bolt in the state are inserted into the blind hole together, the bolt is positioned between the motor output shaft and the elastic piece, and the bolt extrudes the elastic piece. When the worm gear has a clearance, the clearance can be automatically compensated, namely the clearance can be adjusted in a self-adaptive manner. In addition, the self-adaptive compensation device for the coupling clearance for the shaft has the advantages of simple structure, convenience in assembly, simplicity in manufacturing, low manufacturing cost, easiness in guaranteeing the precision requirement and wide application range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a shaft coupling clearance adaptive compensation device according to an embodiment of the present invention;

fig. 2 is an elevation view of a latch provided in accordance with an embodiment of the present invention;

fig. 3 is a left side view of the latch according to the embodiment of the present invention.

Description of reference numerals:

1. a worm shaft; 11. blind holes; 2. an elastic member; 3. an output shaft of the motor; 31. a connecting end portion; 4. a bolt; 41. a groove; 42. a protrusion; 43. an opening; 5. a worm gear; 6. a worm mounting end.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1, the present invention provides a shaft coupling gap adaptive compensation device, which comprises a worm shaft 1, an elastic member 2, a motor output shaft 3 and a plug pin 4, wherein the worm shaft 1 is a part of a worm or is fixedly connected to the worm. The end face of the worm shaft 1 is provided with a blind hole 11 inwards along the axial direction, and the blind hole 11 is used for placing the elastic element 2. The motor output shaft 3 has a connecting end portion 31, and the motor output shaft 3 can be inserted into the blind hole 11, i.e., the motor output shaft 3 can move in the axial direction of the blind hole 11, and from another viewpoint, the worm shaft 1 (or the entire worm) can move in the axial direction (the left-right direction movement as shown in fig. 1) with respect to the motor output shaft 3. The maximum outer diameter of the plug pin 4, which is smaller than the diameter of the blind hole 11 so that the plug pin 4 can be inserted into the blind hole 11, is preferably slightly smaller than the diameter of the blind hole 11 so that the plug pin 4 abuts radially outwards against the inner wall of the blind hole 11. The bolt 4 is provided with a groove 41, the groove 41 is matched with the connecting end part 31, and the bolt 4 is used for extruding the elastic element 2. That is, the plug 4 is provided between the worm shaft 1 and the motor output shaft 3.

During assembly, the worm mounting end 6 is mounted on the spherical bearing, the teeth of the worm abut against the teeth of the worm wheel 5, and the elastic member 2 is in a certain compression state. At this time, the worm is in a stationary state (steady state), and the worm shaft 1 is also in a stationary state. As shown in fig. 1, the right elastic force of the elastic element 2 will not push the worm to move to the right, while the left elastic force of the elastic element 2 will push the latch 4 to move to the left until abutting against the output shaft 3 of the motor, and then the latch 4 is in a static state, i.e. will not move.

In the actual use process, a gap appears after the worm gear and the worm wear, the worm is pushed to move rightwards by the right elastic force of the elastic piece 2, so that the teeth of the worm continuously abut against the teeth of the worm wheel 5, the axial self-adaptive gap compensation of the worm is completed, and the axial gap of the worm gear and the worm is eliminated.

Preferably, the connecting end 31 has a convex spherical surface, and the groove 41 of the plug 4 has a concave spherical surface matched with the convex spherical surface, and the convex spherical surface and the concave spherical surface are matched in a spherical manner, so that the connecting end 31 and the plug 4 can rotate relatively. Because the worm mounting end 6 is mounted on the spherical bearing, both ends of the worm are in spherical fit and can rotate relatively. The angular clearance can appear after the durable wearing of worm and gear, for the convenience of analysis, take one of them contact point of worm and worm wheel 5 as the reference point, because the both ends of worm can rotate relatively, the worm rotates around this contact point this moment, accomplish worm and gear self-adaptation clearance compensation, eliminate the angular clearance of worm and gear. It should be noted that the angular gap includes a radial gap, and adjusting the angular gap adjusts the radial gap to some extent.

The elastic member 2 is a component having elasticity such as a spring, and is preferably a spring. As shown in fig. 2 and 3, the plug 4 is in a shape of a Chinese character 'tu', and is a solid of revolution, that is, it is composed of two cylinders (a larger cylinder and a smaller cylinder) with different outer diameters, and it should be noted that the cylinder here means that the outline is a cylinder, and various grooves can be opened in the cylinder. The larger cylinder is used to compress the spring and the smaller cylinder is the projection 42. At the end of the larger cylinder opposite the projection 42, a recess 41 is made, the projection 42 being intended to be inserted inside the spring, the projection 42 being able to be perforated in its axial direction. At least one opening 43, preferably two symmetrical openings 43, is made in the axial direction of the bolt 4, the openings 43 being elongated and such that the larger cylinder is divided into two parts that are not in contact with each other, which are connected by the projection 42. The openings 43 have a tensioning effect, and when axially compressed, the openings 43 are arranged so that the bolt 4 can be radially expanded, and the side surface of the bolt 4 is in contact with the inner wall of the blind hole 11, so that the fastening effect is achieved, and the clearance compensation effect is achieved.

Alternatively, the spring is fixedly connected to the bottom of the blind hole 11 or the spring is fixedly connected to the plug pin 4, which also achieves the effect of compensating for play.

Example 2

The present embodiment provides a steering column assembly provided with the coupling clearance adaptive compensation device for a shaft described in embodiment 1. The rest parts are the same as the prior art and are not described herein.

Example 3

This embodiment provides an automobile having the steering column assembly described in embodiment 2 mounted thereon. The rest parts are the same as the prior art and are not described herein.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A coupling clearance self-adaptive compensation device for a shaft is characterized by comprising:

the worm shaft (1) is provided with a blind hole (11) along the axial direction;

an elastic element (2) located inside the blind hole (11);

a motor output shaft (3) having a connection end (31) insertable in said blind hole (11); and

the bolt (4) is provided with a groove (41) matched with the connecting end part (31), and the diameter of the bolt (4) is smaller than that of the blind hole (11) and used for extruding the elastic piece (2).

2. Coupling gap adaptive compensation device for shaft according to claim 1, characterized in that the connection end portion (31) has a convex spherical surface and the groove (41) has a concave spherical surface adapted to the convex spherical surface.

3. Coupling gap adaptive compensation device for shaft according to claim 1 or 2, characterized in that the elastic member (2) is a spring.

4. The adaptive compensation device for shaft coupling clearance according to claim 3, characterized in that the plug pin (4) is of a convex type having a protrusion (42) inserted inside the spring.

5. The adaptive compensation device for shaft coupling clearance according to claim 4, characterized in that the bolt (4) is provided with at least one opening (43) along the axial direction for radially expanding the bolt (4).

6. Coupling gap adaptive compensation device for shaft according to claim 3, characterized in that the spring is fixedly connected to the bottom of the blind hole (11).

7. A shaft coupling clearance adaptive compensation device according to claim 3, characterized in that the spring is fixedly connected to the bolt (4).

8. A steering column assembly, characterized in that the steering column assembly is provided with a coupling clearance adaptive compensation device for a shaft according to any one of claims 1 to 7.

9. An automobile, characterized in that the steering column assembly according to claim 8 is mounted on the automobile.

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