External tie rod protection device and automobile steering gear assembly protection device

Abstract

The present invention discloses an external tie rod protection device, including a tube body used to be sleeved on the outer circumference of the external tie rod, and an axial limiting portion and a radial limiting portion are provided on the inner wall surface of the tube body, the axial limiting portion is used to limit the axial sliding of the external tie rod, and the radial limiting portion is used to limit the radial shaking of the external tie rod. The present invention also discloses an automobile steering gear assembly protection device. In the present invention, a tube body is sleeved on the outer circumference of the external tie rod to protect the paint surface of the external tie rod and prevent the paint surface from being damaged; at the same time, the axial sliding of the external tie rod is limited by the axial limiting portion, and the radial shaking of the external tie rod is limited by the radial limiting portion, thereby ensuring the stability of the external tie rod after packaging.

Description

Technical Field

[0001] The invention relates to the technical field of automobile steering gears, in particular to an outer tie rod protection device and an automobile steering gear assembly protection device. Background Art

[0002] Most of the existing automobile steering gears are supplied as an assembly together with the tie rod. The tie rod is made of 45# steel, which may be corroded. Therefore, the OEM generally requires the supplier to carry out rust-proof coating. However, during packaging, Figure 1 As shown, only one plastic sleeve is used for the outer ball pin 1 and the outer ball pin dust cover 2 for storage and transportation protection.

[0003] This protection method lacks paint protection for the rod body of the tie rod, especially the outer tie rod 3 of the tie rod. The paint surface is easily damaged, which greatly reduces its anti-rust effect and causes the tie rod to rust during storage, assembly and use. In the long run, it will also affect the life of the tie rod and even driving safety. In addition, during the research and development of parts by the main engine factory, the entire mechanical steering gear with tie rod assembly will be subjected to a salt spray test to test the corrosion resistance of the paint surface. In the case of paint damage, the damaged area is usually marked before the test, and the corrosion at the location is ignored after the test. This practice will more or less affect the accuracy of the entire test and is not conducive to the judgment of the paint quality of the parts.

[0004] Therefore, it is necessary to design an outer tie rod protection device and an automobile steering gear assembly protection device for protecting the tie rod. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an outer tie rod protection device for protecting a tie rod and an automobile steering gear assembly protection device.

[0006] The technical solution of the present invention provides an external pull rod protection device, including a tube body used to be sleeved on the outer periphery of the external pull rod, and an axial limiting portion and a radial limiting portion are provided on the inner wall surface of the tube body. The axial limiting portion is used to limit the axial sliding of the external pull rod, and the radial limiting portion is used to limit the radial shaking of the external pull rod.

[0007] Furthermore, the tube body is a round tube or a rectangular tube.

[0008] Furthermore, the tube body completely or partially covers the outer circumference of the outer pull rod.

[0009] Furthermore, a notch is provided in the upper half of the front section of the tube body, and the upper half of the rear section of the tube body continuously covers the outer pull rod.

[0010] Furthermore, the axial limiting portion is a limiting baffle, and the limiting baffle is formed at the front end of the rear section of the tube body.

[0011] Furthermore, a slit extending in the axial direction is formed in the lower half of the tube body.

[0012] Furthermore, the radial limiting portion comprises an arc plate, the inner side edge of the arc plate is arc-shaped, and the inner side edge of the arc plate contacts the circumferential surface of the outer pull rod.

[0013] Furthermore, the radial limiting portion comprises an angle plate, the inner side edge of the angle plate forms a right-angle opening, and the inner side edge of the angle plate contacts the right-angle surface of the outer pull rod.

[0014] Furthermore, the outer pull rod protection device is integrally injection molded.

[0015] The present invention also provides a protection device for an automobile steering gear assembly, comprising an outer ball pin protection sleeve and the outer tie rod protection device described in any one of the above items.

[0016] After adopting the above technical solution, the following beneficial effects are achieved:

[0017] In the present invention, a tube body is sleeved on the outer circumference of the outer tie rod to protect the paint surface of the outer tie rod and prevent the paint surface from being damaged; at the same time, the axial sliding of the outer tie rod is limited by the axial limit portion, and the radial shaking of the outer tie rod is limited by the radial limit portion, thereby ensuring the stability of the outer tie rod after packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of a steering gear assembly of an automobile;

[0020] Figure 2 is a three-dimensional diagram of a protective device for an automobile steering gear assembly according to an embodiment of the present invention;

[0021] Figure 3 is a side view of an outer tie rod protection device in another embodiment of the present invention;

[0022] Figure 4 It is a three-dimensional diagram of an outer pull rod protection device in another embodiment of the present invention.

[0023] Reference table of reference numerals:

[0024] 10-External ball pin protection sleeve 20-External tie rod protection device

[0025] 1-External ball pin 2-External ball pin dust cover 3-External pull rod

[0026] 31- inclined surface 32- circumferential surface 33- right angle surface

[0027] 4-tube body 41-limit baffle 42-arc plate

[0028] 43- angle plate 44- notch 45- slit

[0029] 431-right angle mouth DETAILED DESCRIPTION

[0030] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the invention.

[0032] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0033] The "front" in the present invention refers to Figure 1-2 On the left side of the word "back" refers to Figure 1-2 on the right side of the .

[0034] like Figure 1 As shown, the automobile steering gear assembly includes an outer ball pin 1, an outer ball pin dust cover 2 and a tie rod, wherein the tie rod includes an outer tie rod 3 and an inner tie rod. Figure 1 The inner tie rod is omitted.

[0035] One end of the outer tie rod 3 is connected to the outer ball pin 1 and the outer ball pin dust cover 2, and the other end is connected to the inner tie rod.

[0036] The outer tie rod 3 further comprises an inclined surface 31, a circumferential surface 32 and a right angle surface 33. The inclined surface 31 is located close to the outer ball pin 1, and the circumferential surface 32 and the right angle surface 33 are located at the other end of the outer tie rod 3.

[0037] like Figure 2 As shown, the automobile steering gear assembly protection device includes an outer ball pin protection sleeve 10 and an outer tie rod protection device 20.

[0038] The outer ball pin protective sleeve 10 is used to protect the outer ball pin 1 and the outer ball pin dust cover 2, and the outer ball pin protective sleeve 10 is a plastic sleeve. The outer ball pin protective sleeve 10 is a small upper and large lower inverted funnel structure, which is wrapped around the outer ball pin 1 and the outer ball pin dust cover 2.

[0039] The outer tie rod protection device 20 is used to protect the outer tie rod 3. Since the outer diameter of the outer tie rod 3 is larger than the outer diameter of the inner tie rod, when there is no protection device, the outer tie rod 3 is usually in contact with the ground, and the inner tie rod will not or will not easily contact the ground. Therefore, the protection device only needs to protect the outer tie rod 3, and as long as the outer tie rod 3 does not contact the ground, the inner tie rod will not or will not easily contact the ground.

[0040] like Figure 2-4 As shown, in this embodiment, the external tie rod protection device 20 is a long circular tube shell, specifically including a tube body 4 for being sleeved on the outer periphery of the external tie rod 3, and an axial limiting portion 41 and a radial limiting portion (42, 43) are provided on the inner wall surface of the tube body 4. The axial limiting portion 41 is used to limit the axial sliding of the external tie rod 3, and the radial limiting portion (42, 43) is used to limit the radial shaking of the external tie rod 3.

[0041] The tube body 4 is a hollow round tube, and the tube body 4 is used to be sleeved on the outer circumference of the outer tie rod 3 to protect the paint surface on the outer surface of the outer tie rod 3 .

[0042] Optionally, the tube body 4 may also be a rectangular tube, or a tube body of other shapes, as long as it can wrap the outer tie rod 3 therein and protect the outer circumference of the outer tie rod 3 .

[0043] In this embodiment, Figure 3-4 As shown, the tube body 4 does not completely cover the circumferential outer surface of the outer tie rod 3, but only partially covers the outer circumference of the outer tie rod 3. The lower half of the tube body 4 is provided with a slit 45 extending in the axial direction.

[0044] Since the inner wall surface of the tube body 4 is provided with an axial limiting portion 41 and a radial limiting portion (42, 43), the outer rod 3 is limited and supported by the axial limiting portion 41 and the radial limiting portion (42, 43) in the tube body 4, and the outer surface of the outer rod 3 is separated from the ground or keeps a certain distance. Therefore, it is not necessary to wrap the entire circumferential outer surface of the outer rod 3, and only a part of it needs to be wrapped to achieve the separation of the outer rod 3 from the ground.

[0045] The wrapping angle of the tube body 4 in the circumferential direction is not limited to 360°, but may also be 270° or 300°.

[0046] Furthermore, if Figure 2 As shown, a notch 44 is provided at the upper half of the front section of the tube body 4 , and the upper half of the rear section of the tube body 4 continuously covers the outer tie rod 3 .

[0047] Figure 2 The left side is the front and the right side is the back. The notch 44 leaves space for the outer ball pin 1 and the outer ball pin dust cover 2, so that the outer ball pin 1 can be extended from the notch 44. The bottom of the outer ball pin dust cover 2 is located in the lower half of the front section of the tube body, and the top is located in the space of the notch 44. At the same time, the outer ball pin protective cover 10 can also be installed in the space of the notch 44.

[0048] The rear section of the tube body 4 is used to accommodate the outer tie rod 3 and continuously wrap the outer tie rod 3 along the axial direction. The continuous wrapping may be 360° wrapping along the circumferential direction or may not be completely wrapped along the circumferential direction.

[0049] Optionally, the rear section of the tube body 4 may also be hollowed out to form a discontinuous covering of the outer pull rod 3 in the axial direction. The inner outer pull rod 3 can be observed from the outside through the hollowing, and the material of the tube body can also be saved.

[0050] Furthermore, if Figure 2-4 As shown, the axial limiting portion is a limiting baffle 41 , and the limiting baffle 41 is formed at the front end of the rear section of the tube body 4 .

[0051] Specifically, the limit baffle 41 is arranged at a position adjacent to the notch 44, and the limit baffle 41 is used to block the inclined surface 31 of the outer pull rod 3 (see Figure 1 ) to prevent the outer pull rod 3 from sliding along the axis.

[0052] Optionally, the limiting baffle 41 may also be disposed at the tail end of the rear section of the tube body 4 to stop the rear end surface of the outer pull rod 3 .

[0053] Furthermore, if Figure 3-4 As shown, the radial limiting portion includes two arc plates 42 , the inner sides of the arc plates 42 are arc-shaped, and the inner sides of the arc plates 42 are in contact with the circumferential surface 32 of the outer pull rod 3 .

[0054] In this embodiment, since the tube body 4 is a circular tube, the outer side of the arc plate 42 is also arc-shaped, and the arc plate 42 is actually a fan-shaped plate.

[0055] Optionally, when the tube body 4 is a rectangular tube, only the inner side of the arc plate 42 is arc-shaped, and the outer side is a straight line.

[0056] The arc plate 42 is used to contact the circumferential surface 32 of the outer tie rod 3, and is used to define and support the circumferential surface 32 of the outer tie rod 3 to prevent the tube body 4 from shaking in the radial direction.

[0057] Optionally, the number of the arc plates 42 may be three or more, or a whole arc plate 42 surrounding the inner wall of the entire tube body 4 .

[0058] Furthermore, if Figure 3-4As shown, the radial limiting portion includes two angle plates 43 , the inner sides of the angle plates 43 form right-angle openings 431 , and the inner sides of the angle plates 43 are in contact with the right-angle surfaces 33 of the outer tie rod 3 .

[0059] The angle plate 43 is used to limit and support the right-angle surface 33 of the outer tie rod 3 to prevent the tube body 4 from shaking in the radial direction. At the same time, it can also lift the tube body 4 to prevent the tube body 4 from contacting the ground.

[0060] Optionally, the number of the angle plates 43 can be three or more, or a whole plate that surrounds the inner wall of the entire tube body 4. When the angle plate 43 is a whole piece, four right-angle openings 431 can be provided on the angle plate 43, corresponding to the four right angles of the tube body 4 respectively.

[0061] Optionally, only the arc plate 42 or only the angle plate 43 may be provided in the tube body 4 .

[0062] In this embodiment, the outer pull rod protection device is integrally injection molded.

[0063] Optionally, the outer pull rod protection device can also form the tube body 4, the limit baffle 41, the arc plate 42 and the angle plate 43 separately and then bond them together.

[0064] Compared with the existing packaging and protection measures for automobile steering gear assemblies, the present invention adds packaging and protection for the external tie rod shaft, which can effectively prevent damage to the shaft paint surface and effectively reduce the possibility of reduced corrosion resistance of the tie rod due to damage to the shaft paint surface, which is beneficial to ensuring the design life of the parts.

[0065] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An external tie rod protection device, characterized in that: It comprises a tube body used to be sleeved on the outer periphery of the outer pull rod, and an axial limiting portion and a radial limiting portion are provided on the inner wall surface of the tube body, the axial limiting portion is used to limit the outer pull rod from sliding in the axial direction, and the radial limiting portion is used to limit the outer pull rod from shaking in the radial direction; a notch is provided in the upper half of the front section of the tube body; The axial limiting portion is a limiting baffle, and the limiting baffle is formed at the front end of the rear section of the tube body; The radial limiting portion includes an angle plate and an arc plate, the inner side edge of the arc plate is arc-shaped, the inner side edge of the arc plate contacts the circumferential surface of the outer pull rod, the inner side edge of the angle plate forms a right-angle opening, and the inner side edge of the angle plate contacts the right-angle surface of the outer pull rod; The angle plate is a whole piece, and is provided with four right-angled openings. The limit baffle, arc plate and angle plate are arranged inwardly from the notch on the inner wall of the tube body at intervals; The limit baffle is used to block the inclined surface of the outer pull rod to prevent the outer pull rod from sliding along the axis; the arc plate is used to contact the circumferential surface of the outer pull rod, and is used to limit and support the circumferential surface of the outer pull rod to prevent the tube body from shaking in the radial direction; the angle plate is used to limit and support the right-angle surface of the outer pull rod to prevent the tube body from shaking in the radial direction, and can also lift the tube body to prevent the tube body from contacting the ground.

2. The outer tie rod protection device according to claim 1, characterized in that: The tube body is a round tube or a rectangular tube.

3. The outer tie rod protection device according to claim 1, characterized in that: The tube body completely or partially covers the outer circumference of the outer pull rod.

4. The outer tie rod protection device according to claim 1, characterized in that: The upper half of the rear section of the tube body continuously covers the outer pull rod.

5. The outer tie rod protection device according to claim 1, characterized in that: The lower half of the tube body is provided with a slit extending in the axial direction.

6. The outer tie rod protection device according to any one of claims 1 to 5, characterized in that: The outer pull rod protection device is integrally injection-molded.

7. A protective device for an automobile steering gear assembly, comprising an outer ball pin protective sleeve, characterized in that: It also includes the outer pull rod protection device according to any one of claims 1-6.

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