Connecting structure of automobile steering intermediate shaft spline yoke and steering shaft

Abstract

The utility model discloses a connecting structure of an automobile steering intermediate shaft spline yoke and a steering shaft, the spline yoke comprises a yoke lug and a connecting sleeve, an external spline is arranged at the end part of the steering shaft, an internal spline is arranged in the connecting sleeve, and the external spline is matched with the internal spline; by the adoption of the connecting structure of the automobile steering intermediate shaft spline yoke and the steering shaft, it is guaranteed that the cross shaft is accurate in assembly, convenient to assemble and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steering accessory for vehicle, concretely, the utility model relates to a kind of automobile steering intermediate shaft spline yoke and steering shaft connecting structure. BACKGROUND

[0002] The connection of steering intermediate shaft spline yoke and steering shaft adopts spline to transmit torque, and bolt is further arranged to clamp and fix the two, and the current mode is to set cutting groove at the thicker part of spline yoke, and bolt hole is set at both sides of cutting groove, and after being tightened by bolt, cutting groove is extruded to deform to clamp spline yoke and steering shaft, but the two ear holes of spline yoke are also caused to have included angle by extrusion deformation of cutting groove, so that cross shaft is difficult to be correctly assembled, and power transmission is affected.

[0003] The utility model patent with the publication number CN202707832U discloses a kind of connecting structure of yoke and shaft, which is disclosed on January 30, 2013, and is named as a kind of connecting structure of yoke and shaft, which includes yoke and shaft body matched with each other, wherein the yoke is provided with positioning ring, the shaft body is provided with positioning cylinder corresponding to the positioning ring, and outer spline is provided on the side wall of the positioning cylinder along the axis of the positioning cylinder;The inner wall of the positioning ring is provided with inner spline corresponding to the outer spline, and the outer spline and the inner spline are connected to connect the yoke and the shaft body.The connecting structure of yoke and shaft cannot solve the above-mentioned technical problems. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiency of prior art, and provides a kind of connecting structure of automobile steering intermediate shaft spline yoke and steering shaft, which can ensure the accurate assembly of cross shaft, is convenient to assemble and low in cost.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The connecting structure of automobile steering intermediate shaft spline yoke and steering shaft, the spline yoke includes fork ear and connecting sleeve, the steering shaft end is provided with outer spline, the connecting sleeve is provided with inner spline inside, and the outer spline is matched with the inner spline;Connecting sleeve and steering shaft are further connected with bolt.

[0007] The side of the connecting sleeve is provided with through hole, one end of the steering shaft is further provided with threaded hole, the threaded hole penetrates the outer spline, and the bolt passes through the through hole and is connected with the threaded hole.

[0008] The axis of the bolt is perpendicular to the axis of the steering shaft.

[0009] The outer side of the connecting sleeve is provided with positioning step, and the bolt is pressed against the positioning step.

[0010] The bolt includes flange, and the flange is pressed against the positioning step.

[0011] The spline yoke is a symmetrical structure.

[0012] The fork ears are arranged in parallel.

[0013] The technical effect of the utility model is: the automobile steering intermediate shaft spline yoke and steering shaft connecting structure of the utility model, through setting through hole on connecting sleeve, setting thread hole on spline part of steering shaft, through bolt connection clamping and fixing spline yoke and steering shaft, replace the connecting mode of setting cut slot on spline yoke and using bolt locking, avoid the problem of the plane of relative ear hole producing included angle, ensure that cross shaft can be accurately assembled with spline yoke, reduce the complexity of structure, reduce cost, bolt installation direction is more flexible, realize simple assembly, and enough steering torque can be provided, after bolt tightening, there is no additional stress influence on spline yoke through hole part, and it is not easy to deform, and the cross shaft assembly relationship is friendly. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 It is the explosion decomposition drawing of the spline yoke and steering shaft connecting structure of the utility model,

[0016] Figure 2 It is the cooperation schematic view of the spline yoke and steering shaft of the utility model,

[0017] Figure 3 It is the structure schematic view of the spline yoke of the utility model.

[0018] Marked in the drawing: 1, spline yoke, 11, fork ear, 12, connecting sleeve, 13, inner spline, 14, through hole, 15, positioning step, 16, ear hole, 2, steering shaft, 21, outer spline, 22, thread hole, 3, bolt, 31, flange. DETAILED DESCRIPTION

[0019] The specific embodiment of the utility model is further explained in detail by comparing the drawings and the description of the embodiment, the purpose is to help the technical personnel in the art to have more complete, accurate and deep understanding to the inventive concept and technical scheme of the utility model, and help its implementation.

[0020] As Figures 1 to 3As shown, the automobile steering intermediate shaft spline yoke and steering shaft connecting structure, spline yoke 1 includes fork ear 11 and connecting sleeve 12, steering shaft 2 end is provided with outer spline 21, connecting sleeve 12 is provided with inner spline 13, outer spline 21 and inner spline 13 cooperate;Connecting sleeve 12 and steering shaft 2 are also connected with bolt 3.Steering shaft 2 is provided with threaded hole 22, spline yoke 1 is provided with through hole 14, and the two are locked by bolt 3, the spline cooperation part of connecting sleeve 12 and steering shaft 2 can transmit torque, and the static friction of bolt 3 can also provide torque, which has double protection effect and is not easy to fail.

[0021] As shown in Figure 3 , the connecting sleeve 12 side is provided with a through hole 14, and one end of the steering shaft 2 is also provided with a threaded hole 22, the threaded hole 22 penetrates the outer spline 21, and the bolt 3 passes through the through hole 14 and is connected with the threaded hole 22.The above structure makes the bolt 3 pass through the connecting sleeve 12 and connect with the steering shaft 2, forming clamping and fixing of the spline yoke 1 and the steering shaft 2.Through the bolt 3 connection of the bolt 3 and the steering shaft 2, the through hole 14 does not need to be threaded, which saves the cost of cutting groove and threading on the spline yoke 1.Because the bolt 3 is arranged on the connecting sleeve 12, the assembly flexibility is high, the direction of the through hole 14 can be arranged at any angle of 360 degrees of the connecting sleeve 12, so that the real vehicle assembly is not limited to a certain fixed assembly angle, and compared with the common spline yoke connecting mode of the bolt 3 which can only be bolted every 90 degrees, the processing and production process is more convenient and the cost is lower.

[0022] As shown in Figure 1 and Figure 2 , the axis of the bolt 3 is perpendicular to the axis of the steering shaft 2.The above structure makes the bolt 3 centrally arranged on the whole spline yoke 1 and the steering shaft 2, which is conducive to ensuring the uniformity of the connection effect, and the bolt 3 connection direction is flexible, which can reduce the assembly difficulty and improve the assembly efficiency.

[0023] As shown in Figure 3 , the connecting sleeve 12 is provided with a positioning step 15 outside, and the bolt 3 is pressed against the positioning step 15.The positioning step 15 provides positioning contact effect for the extrusion surface of the bolt 3, which ensures the installation flatness of the bolt 3.

[0024] As shown in Figure 1 and Figure 2 , the bolt 3 includes a flange 31, and the flange 31 is pressed against the positioning step 15.The flange 31 increases the contact area of the head of the bolt 3 and the positioning step 15, disperses the force of the bolt 3 extrusion, and can effectively avoid damage to the spline yoke 1.

[0025] As shown in Figure 3As shown in the figure, the spline yoke 1 is a symmetrical structure. Since the spline yoke 1 does not need to be provided with a cutting groove, the spline yoke 1 does not need to be provided with a boss or increase the material thickness, a part of the spline yoke 1 blank cost can be saved, and the weight of the spline yoke 1 is reduced. The symmetrical structure of the spline yoke 1 also reduces the difficulty of structure forming, facilitates the production and processing of the mold, and reduces the production cost.

[0026] As shown in the figure, Figures 1 to 3 The fork ears 11 are arranged in parallel. Since the cutting groove is cancelled on the spline yoke 1, and the bolt 3 connecting surface is located on the connecting sleeve 12, the force will not affect the plane of the fork ear 11, which ensures the parallelism of the relative two ear holes 16 planes, and the cross shaft can be accurately assembled to the ear hole 16.

[0027] The automobile steering intermediate shaft spline yoke and steering shaft connecting structure, by setting the through hole 14 on the connecting sleeve 12, setting the threaded hole 22 on the spline part of the steering shaft 2, clamping and fixing the spline yoke 1 and the steering shaft 2 through the bolt 3, instead of the existing cutting groove on the spline yoke 1 and the bolt 3 locking connection mode, avoids the problem that the plane of the relative ear hole 16 produces an angle, ensures that the cross shaft can be accurately assembled with the spline yoke 1, reduces the structural complexity, reduces the cost; The installation direction of the bolt 3 is more flexible, realizes the simplification of assembly, and can provide sufficient steering torque. After the bolt 3 is tightened, there is no additional stress effect on the spline yoke 1 through hole 14 part, which is not easy to deform, and is friendly to the cross shaft assembly relationship of this part.

[0028] The above is an exemplary description of the present application in conjunction with the drawings. Obviously, the specific implementation of the present application is not limited by the above method. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the present application; or without improvement, the above concept and technical scheme of the present application are directly applied to other occasions, which are within the protection scope of the present application.

Claims

1. A connection structure between a car steering intermediate shaft spline fork and a steering shaft, characterized in that: The spline yoke (1) comprises a yoke ear (11) and a connecting sleeve (12), the steering shaft (2) is provided with an outer spline (21) at the end, the connecting sleeve (12) is provided with an inner spline (13) inside, and the outer spline (21) is matched with the inner spline (13); the connecting sleeve (12) and the steering shaft (2) are further connected with a bolt (3).

2. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to claim 1, characterized by: The connecting sleeve (12) is provided with a through hole (14) at the side, one end of the steering shaft (2) is further provided with a threaded hole (22), the threaded hole (22) penetrates the outer spline (21), the bolt (3) passes through the through hole (14) and is connected with the threaded hole (22).

3. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to claim 2, characterized by: The axis of the bolt (3) is perpendicular to the axis of the steering shaft (2).

4. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to claim 3, characterized by: The connecting sleeve (12) is provided with a positioning step (15) outside, and the bolt (3) is pressed against the positioning step (15).

5. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to claim 4, characterized by: The bolt (3) comprises a flange (31), and the flange (31) is pressed against the positioning step (15).

6. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to any one of claims 1 to 5, characterized by: The spline yoke (1) is a symmetrical structure.

7. The automobile steering intermediate shaft spline yoke and steering shaft connecting structure according to claim 6, characterized by: The yoke ears (11) are arranged in parallel.

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