Crumple type steering shaft

Abstract

The utility model belongs to the technical field of collapsible steering shafts, and discloses a collapsible steering shaft, which comprises a steering rod, a buffer mechanism and a steering shaft, one end of the steering rod is provided with a spline groove, one end of the steering rod is provided with a connecting groove at the periphery of the spline groove, one side of the connecting groove is provided with a compression spring, and the surface of the steering rod is provided with a plurality of grooves. The buffer mechanism comprises a mounting block, a connecting block and a sealing ring, one side of the mounting block is connected with the connecting block, the other side of the mounting block is provided with the sealing ring, the connecting block is connected with the sealing ring, and the sealing ring is connected with the connecting block. A plurality of movable grooves are formed in the surface of the sealing ring, and spline teeth are arranged on the surface of the steering shaft. The device is simple and reasonable in structure, novel in design, easy to operate, high in practicability and convenient to widely popularize and use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to collapsible steering shaft technical field, more specifically, it is especially related to a collapsible steering shaft. BACKGROUND

[0002] The collapsible steering shaft is a key component in the automobile steering system, which mainly functions to effectively reduce the risk of injury to the driver or passenger in the event of a collision or accident. Its working principle is that when subjected to a strong impact, the steering shaft can fold or shorten in a certain way, thereby absorbing the impact force and reducing the direct impact on the driver. Chinese patent application No. CN202220545206.2 discloses a collapsible steering shaft, which includes a steering rod, a plurality of spline grooves are formed on the inner circular wall surface of the steering rod, a steering shaft is provided on one side of the steering rod, a plurality of spline teeth are fixedly installed on the outer circular wall surface of the steering shaft, the steering shaft is movably sleeved on the inner circular wall surface of the steering rod, and the spline teeth and the spline grooves are movably connected together. In use, external force can be applied to the inside of the steering rod to achieve the effect of collapsing. In use, the first steering knuckle can be rotated to make the bolt threadedly connected with the first threaded groove, achieving the effect of quickly connecting the first steering knuckle, facilitating subsequent installation of the steering device, and the connecting shaft can be connected to the second steering knuckle by passing through the inside of the mounting hole, achieving the effect of quick connection.

[0003] Based on the above, the inventor found that the above-mentioned patent has the following problems: the above-mentioned patent can achieve the effect of collapsing by applying external force to the inside of the steering rod, and the first steering knuckle can be rotated to make the bolt threadedly connected with the first threaded groove, achieving the effect of quickly connecting the first steering knuckle, facilitating subsequent installation of the steering device, and the connecting shaft can be connected to the second steering knuckle by passing through the inside of the mounting hole, achieving the effect of quick connection. However, the end of the steering rod provided with the spline groove is not provided with a buffer mechanism, and when subjected to an impact force, the position of the spline groove is prone to deformation and damage due to impact on one side of the first steering knuckle, resulting in ineffective active connection of the steering shaft with the spline groove. At the same time, during long-term driving of the automobile, dust and impurities from the outside world can easily enter the collapsing part of the steering shaft, causing the steering shaft to run smoothly, and even damaging the components.

[0004] Therefore, in view of the above, the existing structure and deficiencies are improved, and a collapsible steering shaft is provided to achieve a more practical value. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a collapsible steering shaft, which is achieved by the following specific technical means:

[0006] The utility model provides a kind of collapsible steering shaft, including steering rod, buffer mechanism and steering shaft, one end of the steering rod is equipped with spline groove, one end of the steering rod is equipped with connecting groove in the periphery of spline groove, one side of the connecting groove is equipped with compression spring, the surface of the steering rod is equipped with several grooves, locking bolt is installed in the groove, one end of the locking bolt extends into connecting groove, the side of connecting groove away from the groove is equipped with the thread groove equal to the number of locking bolt, the buffer mechanism includes mounting block, connecting block and sealing ring, one side of the mounting block is connected with connecting block, the other side of the mounting block is equipped with sealing ring, the surface of the sealing ring is equipped with several movable grooves, the surface of the steering shaft is provided with spline teeth.

[0007] Further, the steering rod is equipped with first steering knuckle away from spline groove.

[0008] Further, the steering shaft is equipped with second steering knuckle at one end.

[0009] Further, the connecting block is matched with the size of connecting groove.

[0010] Further, the thread on the surface of the locking bolt is matched with the thread in the thread groove.

[0011] Further, the spline groove is matched with the size of spline teeth.

[0012] Further, the number of locking bolt is equal to the number of movable grooves, and the size of locking bolt is matched with the size of movable groove.

[0013] Further, the sealing ring is attached to the surface of spline teeth.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] Through the cooperation of locking bolt and thread groove, when the buffer mechanism needs to be installed, the connecting block is inserted into the connecting groove, the movable groove is aligned with the position of locking bolt, then the locking bolt penetrates the movable groove, and the locking bolt is rotated. Since the locking bolt is threadedly connected with the thread groove, the locking bolt moves into the thread groove when the locking bolt is rotated. At this time, the movable groove is movably connected with the locking bolt, so that the buffer mechanism can be quickly and conveniently installed at one end of the steering rod. Conversely, the buffer mechanism can be quickly and conveniently disassembled, thereby achieving the effect of quick connection and disassembly.

[0016] When the steering wheel is impacted by a force, the steering shaft moves in the spline groove, and when one side of the second knuckle contacts the buffer mechanism, the compression spring can buffer the impact force under the action of the force of the compression spring, so that the side of the spline groove is prevented from directly colliding with the side of the second knuckle, the side of the spline groove is prevented from being deformed and damaged, and the collapse effect of the steering rod is improved.

[0017] By using the sealing ring, the sealing ring can effectively prevent dust and impurities from entering the collapse part of the steering shaft during long-term driving of the automobile, thereby preventing the steering shaft from running smoothly, even damaging the parts, and improving the practicability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the utility model.

[0019] Figure 2 is an expanded perspective view of the utility model.

[0020] Figure 3 is a front view of the utility model.

[0021] Figure 4 is a front view of the utility model Figure 2 A is an enlarged view of the utility model.

[0022] Figure 5 is a front view of the utility model Figure 3 B is an enlarged view of the utility model.

[0023] In the figure, the correspondence between the component name and the drawing number is as follows:

[0024] 1, steering rod; 101, spline groove; 102, connecting groove; 103, groove; 104, threaded groove; 2, buffer mechanism; 201, mounting block; 202, connecting block; 203, sealing ring; 204, movable groove; 3, steering shaft; 301, spline tooth; 4, compression spring; 5, locking bolt; 6, first knuckle; 7, second knuckle. DETAILED DESCRIPTION

[0025] The embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0026] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Embodiment:

[0029] As shown in the accompanying Figure 1 to the accompanying Figure 5 As shown:

[0030] The utility model provides a kind of collapsible steering shaft, including steering rod 1, buffer mechanism 2 and steering shaft 3, one end of steering rod 1 is equipped with spline groove 101, one end of steering rod 1 is equipped with connecting groove 102 in the periphery of spline groove 101, compression spring 4 is installed in one side of connecting groove 102, the surface of steering rod 1 is equipped with several recesses 103, locking bolt 5 is installed in recess 103, one end of locking bolt 5 extends into connecting groove 102, the side of connecting groove 102 away from recess 103 is equipped with the thread groove 104 equal in number with locking bolt 5, buffer mechanism 2 includes mounting block 201, connecting block 202 and sealing ring 203, one side of mounting block 201 is connected with connecting block 202, the other side of mounting block 201 is equipped with sealing ring 203, the surface of sealing ring 203 is equipped with several movable grooves 204, the surface of steering shaft 3 is provided with spline tooth 301.

[0031] Among them, the end of steering rod 1 away from spline groove 101 is equipped with first steering knuckle 6.

[0032] Among them, one end of steering shaft 3 is equipped with second steering knuckle 7.

[0033] Among them, the size of connecting block 202 and connecting groove 102 is matched.

[0034] The surface thread of the locking bolt 5 matches the thread in the thread groove 104, and the locking bolt 5 moves into or out of the thread groove 104 when it rotates.

[0035] The spline groove 101 matches the size of the spline tooth 301.

[0036] The number of locking bolts 5 matches the number of movable grooves 204, the size of the locking bolt 5 matches the size of the movable groove 204, the locking bolt 5 penetrates the movable groove 204, and the locking bolt 5 is movably connected with the movable groove 204.

[0037] The sealing ring 203 is in contact with the surface of the spline tooth 301, and the sealing ring 203 can effectively prevent dust and impurities from entering the collapse part of the steering rod 1.

[0038] The working principle of the embodiment is as follows:

[0039] When the locking bolt 5 and the thread groove 104 are used together, the connecting block 202 is inserted into the connecting groove 102, the movable groove 204 is aligned with the position of the locking bolt 5, and then the locking bolt 5 penetrates the movable groove 204. Turn the locking bolt 5, because the locking bolt 5 is screwed with the thread groove 104, so when the locking bolt 5 rotates, it moves into the thread groove 104, at this time the movable groove 204 is movably connected with the locking bolt 5, so that the buffer mechanism 2 can be quickly and conveniently installed at one end of the steering rod 1, and vice versa. The operation can quickly and conveniently disassemble the buffer mechanism 2, thereby achieving the effect of quick connection and disassembly. The end of the steering shaft 3 with the spline tooth 301 penetrates the buffer mechanism 2 and is inserted into the spline groove 101, and the compression spring 4 and the buffer mechanism 2 are used together. When the steering wheel is impacted, the steering shaft 3 moves into the spline groove 101, and when one side of the second steering knuckle 7 contacts the buffer mechanism 2, under the action of the compression spring 4, the compression spring 4 can buffer the impact force to a certain extent, thereby avoiding the side of the spline groove 101 directly colliding with the side of the second steering knuckle 7, causing the side of the spline groove 101 to deform and damage, reducing the collapse effect of the steering rod 1. The use of the sealing ring 203 can effectively prevent dust and impurities from entering the collapse part of the steering shaft 3 during long-term driving of the automobile, thereby avoiding the steering shaft 3 from running smoothly, even damaging the parts, and improving the practicality of the product.

[0040] The embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to thereby enable others skilled in the art to best utilize the present application with various modifications as are suited to the particular use contemplated.

Claims

1. A collapsible steering shaft, comprising a steering rod (1), a buffer mechanism (2) and a steering shaft (3), characterized in that: One end of the steering rod (1) is provided with a spline groove (101), and one end of the steering rod (1) is provided with a connecting groove (102) on the periphery of the spline groove (101), and a compression spring (4) is installed on one side of the connecting groove (102). The surface of the steering rod (1) is provided with a plurality of grooves (103), and a locking bolt (5) is installed in the groove (103). One end of the locking bolt (5) extends into the connecting groove (102), and the connecting groove (102) is away from the groove (103). 3) is provided with a thread groove (104) equal in number to the locking bolt (5) on one side, the buffer mechanism (2) comprises a mounting block (201), a connecting block (202) and a sealing ring (203), one side of the mounting block (201) is connected to the connecting block (202), the other side of the mounting block (201) is provided with a sealing ring (203), the surface of the sealing ring (203) is provided with a plurality of movable grooves (204), and the surface of the steering shaft (3) is provided with spline teeth (301).

2. The collapsible steering shaft according to claim 1, wherein: A first steering knuckle (6) is mounted on one end of the steering rod (1) away from the spline groove (101).

3. The collapsible steering shaft according to claim 1, wherein: A second steering knuckle (7) is installed at one end of the steering shaft (3).

4. The collapsible steering shaft according to claim 1, wherein: The connection block (202) matches the size of the connection groove (102).

5. The collapsible steering shaft according to claim 1, wherein: The threads on the surface of the locking bolt (5) match the threads in the thread groove (104).

6. The collapsible steering shaft according to claim 1, wherein: The spline groove (101) matches the size of the spline teeth (301).

7. The collapsible steering shaft according to claim 1, wherein: The number of the locking bolts (5) is equal to the number of the movable slots (204), and the size of the locking bolts (5) matches the size of the movable slots (204).

8. The collapsible steering shaft according to claim 1, wherein: The sealing ring (203) is in contact with the surface of the spline teeth (301).

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