CN204309888U - Misassembly-preventing steering plumbing arm - Google Patents

Abstract

A kind of error-proof steering drop arm, comprising a drop arm body, one end of the drop arm body is provided with an inner spline hole matched with a spline shaft on the steering rocker shaft, and the inner spline hole is provided with Groove, the longitudinal axis of the groove is parallel to the axis of the spline, the groove is different from the keyway of the inner spline hole, the spline shaft of the steering rocker shaft is provided with the inner spline The convex tooth corresponding to the groove on the key hole, the groove is matched with the convex tooth on the spline shaft of the steering rocker shaft; or, the inner spline hole is provided with a convex tooth, so The longitudinal axis of the convex tooth is parallel to the axis of the spline, and the convex tooth is different from the key tooth of the inner spline hole, and the spline shaft of the steering rocker shaft is provided with a The grooves corresponding to the protruding teeth match with the grooves on the spline shaft of the steering rocker shaft. The utility model has the advantages of simple structure and convenient installation, and can effectively avoid wrong installation of the steering drop arm.

Description

An anti-mistake installation steering drop arm

technical field

The utility model relates to a steering system of an automobile, in particular to a steering pendant arm with the function of preventing wrong assembly, and belongs to the technical field of the automobile steering system.

Background technique

The steering system of automobiles mostly adopts a recirculating ball steering gear, and the output torque of the steering gear is transmitted to the tie rod through the steering drop arm, and then to the bridge trapezoidal mechanism to realize steering. In order to ensure that the number of turns of the steering wheel left and right is the same when the vehicle turns left and right at the same angle, this requires that the front and rear swing angles of the steering drop arm relative to the middle position must be the same. Due to structural design, the axis of the drop arm body connected to the steering gear is not necessarily a vertical position. Usually, we call the angle between the axis of the drop arm body and the vertical plane the initial angle of the drop arm.

The currently widely used scheme is shown in Figure 1. A small groove 3 is processed on the end face of the inner spline hole 2 on the drop arm body 1. The longitudinal axis of the small groove 3 is perpendicular to the axis of the drop arm body 1. After the drop arm and the rocker shaft are installed correctly, the angle between the small groove 3 and the horizontal plane is the initial angle of the steering drop arm. The end surface of the spline shaft on the rocker shaft of the steering machine is provided with another small groove corresponding to the small groove 3 on the drop arm body 1. When assembling, align the two grooves to ensure that the steering vertical correct installation of the arm. Since the steering drop arm and the steering gear are connected by splines, it is difficult to align the two grooves, and the angle of the key teeth is often different. The connection between the steering drop arm and the steering gear of this structure has high requirements for workers and must be Ensure that no mistakes can be made during assembly. Wrong assembly will cause the number of turns of the steering wheel to be different when the vehicle turns left and right at the same angle, which will affect the driver's manipulation.

Contents of the invention

The purpose of this utility model is to aim at the prior art that the steering drop arm and the steering rocker shaft are connected by splines. During manual assembly, the steering drop arm and the steering rocker shaft are not easy to align, and misassembly is easy to occur, resulting in low assembly efficiency and labor costs. The high defect provides a steering pendant arm with simple structure, convenient installation and effective avoidance of wrong installation.

In order to achieve the above object, the technical solution of the utility model is:

A kind of error-proof steering drop arm, comprising a drop arm body, one end of the drop arm body is provided with an inner spline hole matched with a spline shaft on the steering rocker shaft, and the inner spline hole is provided with have grooves or teeth;

When the inner spline hole is provided with a groove, the longitudinal axis of the groove is parallel to the axis of the spline, and the groove is different from the keyway of the inner spline hole, and the steering rocker shaft The spline shaft is provided with convex teeth corresponding to the grooves on the inner spline hole, and the grooves are matched with the convex teeth on the spline shaft of the steering rocker shaft;

When the inner spline hole is provided with protruding teeth, the longitudinal axis of the protruding teeth is parallel to the axis of the spline, and the protruding teeth are different from the key teeth of the inner spline hole. The steering rocker shaft A groove corresponding to the convex tooth on the inner spline hole is provided on the spline shaft of the inner spline hole, and the convex tooth is matched with the groove on the spline shaft of the steering rocker shaft.

Further, the groove width of the groove on the inner spline hole is greater than or equal to twice the width of the keyway of the inner spline hole, or, the groove depth of the groove on the inner spline hole is greater than or equal to the 2 times the depth of the keyway in the inner spline hole;

The tooth width of the convex teeth on the internal spline hole is greater than or equal to twice the tooth width of the internal spline teeth, or, the tooth height of the convex teeth on the internal spline hole is greater than or equal to that of the internal spline 2 times the tooth height of the key tooth.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model makes the convex teeth and grooves on the inner spline hole and the spline shaft obviously different from the spline by setting correspondingly matched convex teeth and grooves on the internal spline holes and spline shafts that are matched and connected. The key teeth and key grooves on the steering arm make the workers only need to cooperate the convex teeth and grooves with obvious distinguishing characteristics to complete the correct installation of the steering drop arm when assembling the steering drop arm. The utility model has a simple structure and makes the steering drop arm The installation of the steering drop arm becomes easier, effectively avoiding the wrong installation of the steering drop arm, improving the installation efficiency of the steering drop arm, and reducing the labor cost of workers.

Description of drawings

Fig. 1 is the structural schematic diagram of steering pendulous arm connection part in the prior art;

Fig. 2 is the structural schematic diagram of steering pendulous arm connection part in the utility model;

Fig. 3 is the schematic diagram of another structure of steering pendulous arm connection part in the utility model;

In the figure, the drop arm body 1, the inner spline hole 2, the small groove 3, the groove 4, and the protruding teeth 5.

detailed description

The utility model will be further described in detail below in conjunction with the description of the accompanying drawings and specific embodiments.

Referring to Fig. 2 and Fig. 3, a steering pendant for error-proof installation includes a pendant body 1, and one end of the pendant body 1 is provided with an inner spline hole 2 matched with the spline shaft on the steering rocker shaft , the inner spline hole 2 is provided with a groove 4 or a convex tooth 5; when the inner spline hole 2 is provided with a groove 4, the longitudinal axis of the groove 4 is aligned with the axis of the spline Parallel, the groove 4 is different from the keyway of the inner spline hole 2, and the spline shaft of the steering rocker shaft is provided with convex teeth corresponding to the groove 4 on the inner spline hole 2, The groove 4 matches the convex teeth on the spline shaft of the steering rocker shaft;

When the internal spline hole 2 is provided with a convex tooth 5, the longitudinal axis of the convex tooth 5 is parallel to the axis of the spline, and the convex tooth 5 is different from the key tooth of the internal spline hole 2, so The spline shaft of the steering rocker shaft is provided with a groove corresponding to the convex tooth 5 on the inner spline hole 2, and the convex tooth 5 is connected to the concave groove on the spline shaft of the steering rocker shaft. slots to match.

There can be one or more grooves 4 or protruding teeth 5 arranged on the inner spline hole 2 . When the inner spline hole 2 is provided with a groove 4 or a protruding tooth 5, the groove 4 or the protruding tooth 5 cannot be arranged on the vertical straight line of the inner spline hole 2 when the drop arm body 1 is in the middle position Above; when the inner spline hole 2 is provided with multiple grooves 4 or protruding teeth 5, the grooves 4 or protruding teeth 5 cannot be equally divided on the inner spline hole 2, and at the same time, cannot be symmetrically arranged on the inner spline hole 2 When the drop arm body 1 is in the middle position, the vertical diameter of the inner spline hole 2 is on both sides of the straight line. In addition, when the inner spline hole 2 is provided with a plurality of grooves 4 or protruding teeth 5, the grooves 4 or protruding teeth 5 can be dispersedly arranged on the inner spline hole 2 or continuously arranged on the inner spline hole 2 .

As shown in Figure 2, the groove width of the groove 4 of the inner spline hole 2 is greater than or equal to 2 times of the keyway width of the inner spline hole 2, or, the groove width of the groove 4 on the inner spline hole 2 The groove depth is greater than or equal to twice the depth of the keyway in the inner spline hole 2. Make the groove 4 on the inner spline hole 2 and the key groove on the inner spline hole 2 have obvious distinguishing features.

At this time, the spline shaft of the steering rocker shaft is provided with protruding teeth matched with the groove 4, and the protruding teeth on the spline shaft of the rocker shaft and the key teeth on the spline shaft have obvious differences. distinguishing features.

As shown in Figure 3, the width of the convex teeth 5 in the inner spline hole 2 is greater than or equal to twice the width of the key teeth in the inner spline hole 2, or the teeth of the convex teeth 5 on the inner spline hole 2 The height is greater than or equal to twice the tooth height of the inner spline 2 teeth. The protruding teeth 5 on the inner spline hole 2 and the key teeth on the inner spline hole 2 have distinct characteristics.

At this time, the spline shaft of the steering rocker shaft is provided with a groove that matches the protruding tooth 5, and the groove on the spline shaft of the steering rocker shaft and the keyway on the spline shaft have the same Clearly distinguishing features.

The above content is a further detailed description of the utility model in conjunction with specific embodiments. It cannot be considered that the specific implementation of the utility model is only limited to these descriptions. Under the premise of the new concept, all simple replacements should be considered as belonging to the protection scope of the present utility model.

Claims (2)

1. An error-proof steering drop arm, including a drop arm body (1), one end of the drop arm body (1) is provided with an inner spline hole (2 ), characterized in that: the inner spline hole (2) is provided with grooves (4) or convex teeth (5); When the inner spline hole (2) is provided with a groove (4), the longitudinal axis of the groove (4) is parallel to the axis of the spline, and the groove (4) is different from the inner spline The keyway of the key hole (2), the spline shaft of the steering rocker shaft is provided with convex teeth corresponding to the groove (4) on the inner spline hole (2), and the groove ( 4) Cooperate with the convex teeth on the spline shaft of the steering rocker shaft; When the inner spline hole (2) is provided with a protruding tooth (5), the longitudinal axis of the protruding tooth (5) is parallel to the axis of the spline, and the protruding tooth (5) is different from the inner spline The key tooth of the key hole (2), the spline shaft of the steering rocker shaft is provided with a groove corresponding to the convex tooth (5) on the inner spline hole (2), and the convex tooth ( 5) Cooperate with the groove on the spline shaft of the steering rocker shaft. 2. The anti-wrong steering drop arm according to claim 1, characterized in that: the groove width of the upper groove (4) of the inner spline hole (2) is greater than or equal to that of the inner spline hole ( 2) 2 times the width of the keyway, or, the groove depth of the upper groove (4) of the inner spline hole (2) is greater than or equal to 2 times the depth of the keyway of the inner spline hole (2); The tooth width of the convex tooth (5) on the inner spline hole (2) is greater than or equal to twice the tooth width of the inner spline (2), or the inner spline hole (2) is convex The tooth height of the tooth (5) is greater than or equal to twice the tooth height of the internal spline (2).