Spherical hinge joint and inner tie rod for passenger car steering gear box

Abstract

The utility model discloses a spherical hinge joint and an inner tie rod for a passenger car steering gear box, which comprise a rod body and a ball head arranged at the end part of the rod body, and an oil storage structure is arranged on the ball head. According to the utility model, the oil storage structure is arranged on the ball head of the ball head rod, and the lubricating grease is injected into the oil storage structure, so that when the ball head rod and the rod end body are assembled together, the lubricating grease in the oil storage structure can gradually permeate into a friction surface to generate a lubricating effect in the use process; and therefore, the long-term good rotation performance of the spherical hinge joint is effectively ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ball hinge joint, specifically relates to a ball hinge joint and the inner tie rod for passenger car direction machine. BACKGROUND

[0002] The inner tie rod for passenger car direction machine is the connecting mechanism between the transmission mechanism of the automobile direction machine and the outer tie rod of steering, and is also the key link in the automobile steering system, and the performance of the ball hinge joint of the inner tie rod will directly affect the stability of the automobile steering system. Figure 2 As shown in the accompanying drawings, the ball head part of the ball head rod of an existing inner tie rod ball hinge joint structure is matched together with the integral polyformaldehyde ball seat in the concave cavity of the rod end body, but because there is no oil storage structure inside the matching structure, the product may have the problem of poor lubrication after being used for a certain period of time, thereby affecting the rotation smoothness of the ball hinge joint structure. UTILITY MODEL CONTENT

[0003] In view of the defects in the prior art, the utility model provides a ball head rod, which is provided with an oil storage groove on the ball head, so that the lubricating performance of the ball hinge joint can be effectively improved.

[0004] To achieve the above-mentioned purpose, the utility model is realized by the following technical scheme:

[0005] A ball head rod is applied to a ball hinge joint, which comprises a rod body and a ball head arranged at the end of the rod body, and an oil storage structure is arranged on the ball head.

[0006] Further, the oil storage structure is an oil storage groove, and the center line of the oil storage groove coincides with the center line of the rod body.

[0007] Based on the same inventive concept, the utility model further provides a ball hinge joint, which comprises a rod end body and the ball head rod according to any one of the above, an installation cavity for installing the ball head is arranged in the rod end body, a front ball seat and a rear ball seat are installed in the installation cavity, a front ball seat concave spherical surface and a rear ball seat concave spherical surface are respectively formed on the front ball seat and the rear ball seat, a wear-resistant layer is arranged on the inner wall of the front ball seat concave spherical surface and the rear ball seat concave spherical surface, and the ball head of the ball head rod is adaptively and movably installed between the front ball seat concave spherical surface and the rear ball seat concave spherical surface.

[0008] Further, the wear-resistant layer on the inner wall of the front ball seat concave spherical surface is configured to abut against the front half part spherical surface of the ball head, and the wear-resistant layer on the inner wall of the rear ball seat concave spherical surface is configured to abut against the rear half part spherical surface of the ball head.

[0009] Further, the mounting cavity of the rod end body has a first opening and a second opening arranged opposite to each other, the rod body of the ball head rod is inserted from the first opening side and penetrates out from the second opening side until the rear half ball surface of the ball head abuts on the wear-resistant layer at the inner wall of the rear ball seat concave ball surface, the front ball seat is correspondingly mounted at the front half of the ball head, and the wear-resistant layer on the inner wall of the front ball seat concave ball surface abuts on the front half ball surface of the ball head, a screw plug is mounted at the first opening side of the mounting cavity, an elastic element is arranged between the screw plug and the front ball seat, and the rotation torque of the ball hinge joint is adjusted by rotating the screw plug to control the compression amount of the elastic element.

[0010] Further, the elastic element is a compression spring.

[0011] Further, the front ball seat and the rear ball seat are both steel material ball seat structures.

[0012] Further, the wear-resistant layer is a PA66 wear-resistant layer or a POM wear-resistant layer.

[0013] Further, a step limiting portion is formed on the inner wall of the second opening side of the mounting cavity, and the rear ball seat abuts on the step limiting portion.

[0014] Based on the same inventive concept, the utility model also provides a inner tie rod for passenger car steering gear.

[0015] The above technical scheme has the following advantages or beneficial effects:

[0016] The ball hinge joint and the inner tie rod for passenger car steering gear have the following advantages: the oil storage groove is arranged on the ball head of the ball head rod, and the lubricating grease is injected into the oil storage groove, so that the lubricating grease in the oil storage groove gradually penetrates into the friction surface to produce lubricating effect in the use process when the ball head rod and the rod end body are assembled together, and the rotation performance of the ball hinge joint is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure schematic view of the ball hinge joint of the utility model embodiment.

[0018] Figure 2 is a structure schematic view of the ball hinge joint of the prior art.

[0019] Label explanation:

[0020] 1, ball head rod, 2, rod end body, 3, front ball seat, 4, rear ball seat, 5, wear-resistant layer, 6, screw plug, 7, elastic element, 11, rod body, 12, ball head, 21, step limiting portion, 121, oil storage groove. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings and embodiments.

[0022] In the description of the utility model, need understanding is, the term "upper", "lower", "front", "back", "left", "right", "top", "bottom", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the restriction of the utility model.

[0023] Please refer to the attached Figure 1 One embodiment of the utility model provides a ball head rod, be applied to ball hinge node, including rod body 11 and be located at the end of rod body 11 ball head 12, ball head 12 is set with oil storage structure 121.Can understand in this embodiment, by setting up oil storage structure 121 on the ball head 12 of ball head rod, injects lubricating grease in oil storage structure, thus, when the ball head rod and rod end body 2 are assembled together, the lubricating grease in oil storage structure 121 will gradually penetrate into the friction surface and produce lubricating effect in use process, further effectively guarantee that ball hinge node long-term guarantee good rotation performance.

[0024] Please refer to the attached Figure 1 In one preferable embodiment, the oil storage structure 121 is an oil storage groove, and the center line of the oil storage groove coincides with the center line of the rod body 11. However, those skilled in the art should understand that in other embodiments, the center line of the oil storage structure 121 does not require to strictly coincide with the center line of the rod body 11, and can be appropriately skewed according to needs. In other embodiments, the oil storage structure can also be a spiral groove structure or a porous structure, and is not limited to the specific embodiments disclosed in the present embodiment.

[0025] Please refer to the attached Figure 1The utility model discloses a kind of ball hinge nodes, including pole end body 2 and above any described ball head pole 1, installation cavity for installing ball head 12 is opened in pole end body 2, front ball seat 3 and rear ball seat 4 are installed in installation cavity, front ball seat 3 and rear ball seat 4 are formed with front ball seat concave spherical surface and rear ball seat concave spherical surface respectively, wear-resistant layer 5 is equipped on the inner wall of front ball seat concave spherical surface and rear ball seat concave spherical surface, ball head 12 of ball head pole 1 is adaptively installed between front ball seat concave spherical surface and rear ball seat concave spherical surface.Further, the wear-resistant layer 5 on the inner wall of front ball seat concave spherical surface is configured to abut on the front half part spherical surface of ball head 12, the wear-resistant layer 5 on the inner wall of rear ball seat concave spherical surface is configured to abut on the rear half part spherical surface of ball head 12. Preferably, the installation cavity of pole end body 2 has first opening and second opening oppositely arranged, the rod body 11 of ball head pole 1 is inserted from the first opening side and passes out from the second opening side until the rear half part spherical surface of ball head 12 abuts on the wear-resistant layer 5 on the inner wall of rear ball seat concave spherical surface, front ball seat 3 is correspondingly installed at the front half part of ball head 12 and the wear-resistant layer 5 on the inner wall of its front ball seat concave spherical surface abuts on the front half part spherical surface of ball head 12, a screw plug 6 is installed on the first opening side of installation cavity, and an elastic member 7 is provided between the screw plug 6 and the front ball seat 3. The compression amount of the elastic member 7 is controlled by rotating the screw plug 6 to adjust the rotational torque of the ball hinge node. In the embodiment, the ball seat is formed by combining the front ball seat 3 and the rear ball seat 4, and the elastic member 7 is provided between the screw plug 6 and the front ball seat 3. In this way, the elastic member 7 is extended and retracted by rotating the screw plug 6 to adjust the compression amount, thereby changing the contact pressure between the front ball seat 3 and the surface of the ball head 12, and achieving the effect of accurately controlling the rotational torque of the ball hinge node. At the same time, when the ball hinge node is worn out after long-term use, the elastic force of the elastic member 7 can be increased by tightening the screw plug 6 to improve the rotational torque decay problem. In addition, when the parts of the ball hinge node are worn out after long-term use, the screw plug 6 can be unscrewed to replace the corresponding front ball seat 3 or rear ball seat 4 or ball head pole, avoiding overall replacement and reducing costs.

[0026] Please refer to the accompanying drawings Figure 1 In a preferred embodiment, the elastic member 7 is a compression spring. However, those skilled in the art should understand that in other embodiments, the elastic member 7 can also be other types of compression spring structures, and is not limited to the specific implementation disclosed in the embodiment, as long as the front ball seat 3 can be elastically pressed on the ball head 12 by the elastic force of the elastic member 7.

[0027] Please refer to the accompanying drawings Figure 1 In a preferred embodiment, the front ball seat 3 and the rear ball seat 4 are both steel material ball seat structures. In the embodiment, by using the steel material ball seat combined with the wear-resistant layer structure, the carrying capacity and impact resistance of the product can be improved.

[0028] Please refer to the accompanying drawings Figure 1In one preferred embodiment, the wear-resistant layer 5 is a PA66 wear-resistant layer or a POM wear-resistant layer.

[0029] Please refer to the accompanying drawings Figure 1 In one preferred embodiment, a step limiting part 21 is formed on the inner wall of the second opening side of the mounting cavity, and the rear ball seat 4 abuts against the step limiting part 21.

[0030] Please refer to the accompanying drawings Figure 1 In one embodiment, the utility model also provides an inner transverse pull rod for a passenger car direction machine, which comprises the ball hinge joint described above.

[0031] The above description is only used to illustrate the technical solutions of the utility model, and is not a limitation. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model, and therefore all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A spherical hinge node, characterized by: The rod includes a rod end body (2) and a ball head rod (1). The ball head rod includes a rod body (11) and a ball head (12) located at the end of the rod body (11). The ball head (12) has an oil storage structure (121). The rod end body (2) has an installation cavity for installing the ball head (12). A front ball seat (3) and a rear ball seat (4) are installed in the installation cavity. A front ball seat concave spherical surface and a rear ball seat concave spherical surface are formed on the front ball seat (3) and the rear ball seat (4), respectively. A wear-resistant layer (5) is provided on the inner wall of the front ball seat concave spherical surface and the rear ball seat concave spherical surface. The ball head (12) of the ball head rod (1) is adapted to be movably installed between the front ball seat concave spherical surface and the rear ball seat concave spherical surface. The wear-resistant layer (5) on the inner wall of the concave spherical surface of the front ball seat is configured to abut against the front half of the spherical surface of the ball head (12), and the wear-resistant layer (5) on the inner wall of the concave spherical surface of the rear ball seat is configured to abut against the rear half of the spherical surface of the ball head (12). The mounting cavity of the rod end body (2) has a first opening and a second opening arranged in opposite directions. The rod body (11) of the ball head (1) is inserted from the first opening side and passes through the second opening side until the rear half of the ball head (12) abuts against the wear-resistant layer (5) on the inner wall of the concave spherical surface of the rear ball seat. The front ball seat (3) is installed at the front half of the ball head (12) and the wear-resistant layer (5) on the inner wall of the concave spherical surface of the front ball seat abuts against the front half of the ball head (12). A screw plug (6) is installed on the first opening side of the mounting cavity. An elastic element (7) is provided between the screw plug (6) and the front ball seat (3). The compression of the elastic element (7) is controlled by rotating the screw plug (6), thereby adjusting the rotational torque of the ball joint.

2. The ball joint according to claim 1, characterized in that: The elastic element (7) is a compression spring.

3. The ball joint according to claim 1, characterized in that: Both the front ball seat (3) and the rear ball seat (4) are steel ball seat structures.

4. The ball joint according to claim 3, characterized in that: The wear-resistant layer (5) is a PA66 wear-resistant layer or a POM wear-resistant layer.

5. The ball joint according to claim 1, characterized in that: A stepped limiting part (21) is formed on the inner wall of the second opening side of the mounting cavity, and the rear ball seat (4) abuts against the stepped limiting part (21).

6. The ball joint according to claim 1, characterized in that: The oil storage structure (121) is an oil storage tank, and the center line of the oil storage tank coincides with the center line of the rod (11).

7. An inner tie rod for a passenger vehicle steering gear, characterized in that: Includes the ball joint as described in any one of claims 1 to 6.

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