CN212709650U

CN212709650U - Automobile steering input shaft

Info

Publication number: CN212709650U
Application number: CN202021539255.2U
Authority: CN
Inventors: 董西杰; 汪标; 罗建
Original assignee: Zhejiang Huifeng Auto Parts Co ltd
Current assignee: Zhejiang Huifeng Auto Parts Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-16
Anticipated expiration: 2030-07-30

Abstract

The utility model provides a car steering input shaft belongs to auto-parts technical field. It has solved the inconvenient processing of current auto steering input shaft, structural strength low scheduling problem. The automobile steering input shaft comprises a straight rod-shaped body, wherein the body is provided with an installation blind hole which extends axially and is coaxially arranged, and the body is provided with two symmetrically arranged and axially and outwards convex lugs on the end surface of the opening side of the installation blind hole. The utility model has the advantages of simple structure, convenient manufacture, high structural strength and the like.

Description

Automobile steering input shaft

Technical Field

The utility model belongs to the technical field of auto-parts, a auto-steering accessory, in particular to auto-steering input shaft is related to.

Background

When the automobile runs, the automobile is controlled by a steering wheel, and the steering wheel is connected with an input shaft on an automobile steering gear assembly, so that power on the steering wheel is transmitted to the steering gear assembly through the input shaft, and the automobile is steered during running.

For example, chinese patent literature discloses an automobile steering input shaft [ application No.: 201420445429.7, respectively; authorization notice number: CN204127090U ], which comprises a front part, a middle part and a rear part which are connected into a whole, wherein the front part, the middle part and the rear part are all in a cylindrical shape and the outer diameters of the front part, the end surface of the front part protrudes outwards to form an annular connecting part, the inner diameter of the connecting part is larger than that of the front part, the edge of the connecting part is recessed outwards to form a key slot, the key slot is in a long strip shape, the cross section of the key slot is in a step shape, the key slot comprises a bottom wall and a side wall, the.

Foretell car turns to input shaft passes through the setting of keyway for in the output shaft inserts the input shaft, improve the antitorque ability of input shaft, but in the output shaft inserts the input shaft, can influence the assembly of torsion bar, the size that requires the input shaft is great, has increased manufacturing cost, and the keyway has reduced the thickness of connecting portion moreover, and structural strength is ideal inadequately, and life is short, easily wearing and tearing and cause to turn to the abnormal sound.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, easily make, structural strength is high, can reduce the automobile steering input shaft that turns to the abnormal sound problem that produces after wearing and tearing.

The purpose of the utility model can be realized by the following technical proposal: the automobile steering input shaft comprises a straight rod-shaped body and is characterized in that the body is provided with an installation blind hole which extends axially and is coaxially arranged, and the end face of the body on the side of the opening of the installation blind hole is provided with two symmetrically arranged lugs which protrude outwards axially.

In the above-mentioned automobile steering input shaft, the end face of the body on the side of the blind hole opening has a connecting cylinder which extends axially and is in a cylindrical shape, the connecting cylinder and the body are coaxially arranged, and the two lugs are both connected with the connecting cylinder in a radially outward convex manner and are arranged symmetrically to the connecting cylinder.

In the above-described steering input shaft for an automobile, the lug is flush with the connecting cylinder.

In the above-mentioned steering input shaft for an automobile, the outer wall and the inner wall of the lug are both convex cambered surfaces, and when viewed in a radial cross section, the arc length of the inner wall of the lug is greater than that of the outer wall of the lug.

In one of the above-mentioned automotive steering input shafts, the edges of both the lugs and the connecting tube are chamfered or radiused.

In the above-mentioned automobile steering input shaft, the root parts of the two side edges of the lug are connected with arc grooves on the end surface of the body, and the outer ends of the arc grooves are connected with the outer wall of the body.

In the automobile steering input shaft, the end face of the body, which is far away from the lug, is provided with the coaxially arranged first positioning blind hole, and the outer wall of the body, which is close to the lug, is provided with the radially arranged second positioning blind hole.

In the above-mentioned automobile steering input shaft, the outer wall of the body divide into the reducing diameter section that a plurality of sections external diameters dwindle in proper order and the external diameter of the reducing diameter section that is more far away from the lug is the less, the inner wall of installation blind hole divide into the reducing hole section that a plurality of sections internal diameters dwindle in proper order and the internal diameter of the reducing hole section that is more close to the installation blind hole bottom is the less.

Compared with the prior art, the automobile steering input shaft has the advantages of simple structure, high processing precision, convenience in manufacturing, low manufacturing cost, high structural strength, convenience in assembly, energy-absorbing crushing function and long service life, and can effectively reduce the steering abnormal sound problem generated after abrasion.

Drawings

Fig. 1 is a structural sectional view of the steering input shaft of the present automobile.

Fig. 2 is a plan view showing the structure of the steering input shaft of the present automobile.

In the figure, 1, a body; 2. installing blind holes; 3. a lug; 4. a connecting cylinder; 5. an arc-shaped groove; 6. positioning a first blind hole; 7. a second positioning blind hole; 8. a reducing section; 9. a hole shrinking section.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the steering input shaft of the automobile comprises a straight rod-shaped body 1, the body 1 is provided with a mounting blind hole 2 which extends axially and is coaxially arranged, and the end surface of the body 1 on the side of the opening of the mounting blind hole 2 is provided with two symmetrically arranged lugs 3 which protrude axially outwards.

This automobile steering input shaft changes the through-hole that originally link up into installation blind hole 2, has improved structural strength, and four keyways and notches in the past have been replaced to two lugs 3 for simple structure, it is convenient to make, has reduced manufacturing cost, and lug 3's structural strength is high moreover, the output shaft connection cooperation of being convenient for, and long service life has reduced the abnormal sound problem that turns to that produces after wearing and tearing greatly.

In more detail, the end face of the body 1 at the side of the opening of the installation blind hole 2 is provided with a connecting cylinder 4 which extends axially and is in a cylindrical shape, the connecting cylinder 4 and the body 1 are coaxially arranged, the two lugs 3 are both connected with the connecting cylinder 4 in a radially outward convex manner and are arranged symmetrically to the connecting cylinder 4, and the connecting cylinder 4 increases the structural strength of the lugs 3, so that the connection is stable and has long service life; the lug 3 is as high as the connecting cylinder 4, so that the processing and the manufacturing are convenient, and the structural strength is high.

The outer wall and the inner wall of the lug 3 are both convex cambered surfaces, and the arc length of the inner wall of the lug 3 is larger than that of the outer wall of the lug 3 when seen from a radial section, so that the structural strength of the lug 3 and the connecting cylinder 4 are integrated is high, and the lug 3 is convenient to assemble due to the outer wall of the cambered surface; the edges of the lug 3 and the connecting cylinder 4 are in chamfer transition, and the chamfer can be replaced by a fillet in actual manufacturing, so that burrs and hidden cracks are removed, and the guide function is achieved, and the assembly is convenient; the root on 3 both sides limits of lug all is connected with arc recess 5 that is located 1 terminal surface of body, and the outer end of arc recess 5 is connected in the outer wall of body 1, and every lug 3 is connected with the arc recess 5 of twice symmetry, and arc recess 5 avoids stress concentration, and provides the space of stepping down, and the assembly of being convenient for has still reduced area of contact, reduces wearing and tearing.

The end face, far away from the lug 3, of the body 1 is provided with a coaxially arranged positioning blind hole I6, and the outer wall, near the lug 3, of the body 1 is provided with a radially arranged positioning blind hole II 7, so that accurate positioning is facilitated, and the machining precision is improved; the outer wall of the body 1 is divided into four reducing sections 8 with sequentially reduced outer diameters, the outer diameter of the reducing section 8 far away from the lug 3 is smaller, the inner wall of the mounting blind hole 2 is divided into three reducing sections 9 with sequentially reduced inner diameters, and the inner diameter of the reducing section 9 close to the bottom of the mounting blind hole 2 is smaller, so that the body 1 has a good energy-absorbing crushing function, and the safety is improved.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides an automobile steering input shaft, is including being straight rod-like body (1), its characterized in that, body (1) have axial extension and coaxial setting's installation blind hole (2), body (1) have two symmetrical settings and axially evagination lug (3) in the terminal surface of installation blind hole (2) aperture side.

2. The vehicle steering input shaft according to claim 1, characterized in that the end surface of the body (1) on the side of the opening of the blind mounting hole (2) is provided with a connecting cylinder (4) which is axially extended and is cylindrical, the connecting cylinder (4) and the body (1) are coaxially arranged, and the two lugs (3) are respectively connected with the connecting cylinder (4) in a radially outward protruding manner and are symmetrically arranged on the connecting cylinder (4).

3. An automobile steering input shaft according to claim 2, characterized in that the lugs (3) are level with the connecting cylinder (4).

4. A steering input shaft for a motor vehicle according to claim 3, characterized in that the outer and inner walls of the lug (3) are convexly curved, the inner wall of the lug (3) having a greater arc length than the outer wall of the lug (3) when viewed in radial cross-section.

5. An input-steering shaft according to claim 4, wherein the edges of both the lugs (3) and the connecting cylinder (4) are chamfered or rounded.

6. The automobile steering input shaft according to claim 5, characterized in that the root parts of the two side edges of the lug (3) are connected with arc-shaped grooves (5) positioned on the end surface of the body (1), and the outer ends of the arc-shaped grooves (5) are connected with the outer wall of the body (1).

7. The vehicle steering input shaft according to claim 6, characterized in that the end surface of the body (1) far away from the lug (3) is provided with a coaxially arranged positioning blind hole I (6), and the outer wall of the body (1) near the lug (3) is provided with a radially arranged positioning blind hole II (7).

8. The steering input shaft for the automobile as claimed in claim 7, wherein the outer wall of the body (1) is divided into several reducing sections (8) with successively smaller outer diameters and the smaller the outer diameter of the reducing section (8) farther from the lug (3), and the inner wall of the mounting blind hole (2) is divided into several reducing sections (9) with successively smaller inner diameters and the smaller the inner diameter of the reducing section (9) closer to the bottom of the mounting blind hole (2).