Snap groove for preventing the falling of the edge part of the dust cover of the blocking ring

Abstract

The utility model relates to the technical field of automobile outer pull rod, specifically relates to a clamping groove for preventing the falling of the mouth rim part of dust cover, and is applied to the automobile outer pull rod, including pull rod, ball pin, outer ball cover and dust cover, and the ball pin is formed along the end part of pull rod and is swollen, and the ball pin is covered on the outer ball cover, and the dust cover is arranged between the ball pin and the outer ball cover, the outer surface of outer ball cover is provided with recess I, the outer surface of pull rod is provided with recess II, and the dust cover is respectively provided with the mouth rim part matched with recess I and recess II, the width of recess I and recess II is all greater than the maximum thickness 0.5mm of the deformation of dust cover mouth rim part. The utility model sets up the recess of specific width on the surface of outer ball cover and pull rod, makes the dust cover mouth rim part be able to be closely embedded, utilizes the location of recess and the deformation characteristic of dust cover, guarantees the stable connection of dust cover under the complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of automotive tie rod technology, specifically to a slot for preventing the edge of the dust cover of the retaining ring from falling off. Background Technology

[0002] In automotive tie rod systems, a dust cover is required at the mating point of the ball joint and outer ball sleeve to isolate dust, moisture, and other impurities, ensuring smooth lubrication and movement between components. However, the existing dust cover's edge groove dimensions are determined solely by customer requirements, lacking theoretical design support. After the retaining ring is installed, the thickness of the smaller end of the dust cover is prone to deformation, leading to compression and detachment within the groove, a problem that is difficult to identify and prevent. The dust cover often detaches from the groove due to vibration, impact, or excessive deformation, causing dustproof failure and subsequently resulting in ball joint wear, outer ball sleeve corrosion, and other issues, affecting vehicle safety and component lifespan. Traditional solutions, such as the ball joint dust cover, ball joint assembly, and automotive components described in Chinese Patent Publication No. CN202612659U, often rely on simply increasing the groove width or using adhesive for fixation. However, the former is prone to failure due to dust cover deformation and bulging out of the groove, while the latter carries the risk of aging and detachment, and is difficult to adapt to dynamic stress under complex operating conditions. Furthermore, insufficient fit between the dust cover and the component can also lead to decreased sealing performance and accelerated component wear. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a slot to prevent the edge of the dust cover of the retaining ring from falling off.

[0004] The technical solution adopted in this utility model is as follows: A groove for preventing the edge of a dust cover from detaching from a car's outer tie rod is provided. The groove includes a tie rod, a ball pin, an outer ball sleeve, and a dust cover. The ball pin expands along the end of the tie rod and covers the outer ball sleeve. The dust cover is positioned between the ball pin and the outer ball sleeve. The outer surface of the outer ball sleeve has a groove I, and the outer surface of the tie rod has a groove II. The dust cover has an edge portion that mates with both groove I and groove II. The width of both groove I and groove II is greater than the maximum thickness of the deformed edge portion of the dust cover by 0.5 mm. The dust cover has a spherical portion that mates with the outer ball sleeve and a conical portion that mates with the tie rod. A recessed transition portion is provided between the spherical portion and the conical portion.

[0005] This technical solution creates grooves of a specific width on the surfaces of the outer ball sleeve and the tie rod, allowing the edge of the dust cover to be tightly embedded. By utilizing the limiting properties of the grooves and the deformation characteristics of the dust cover, a stable connection of the dust cover is ensured under complex working conditions. At the same time, the unique spherical, conical, and transitional parts of the dust cover conform to the shape of the components, enhancing the sealing effect and dispersing stress, thus achieving the dual functions of preventing the dust cover edge from falling off and sealing it.

[0006] In addition, the slot for preventing the dust cover edge of the retaining ring from falling off, as described above, may also have the following additional technical features: According to one embodiment of the present invention, the sidewalls of the groove I and the groove II are provided with guide arc surfaces.

[0007] In this technical solution, the guide arc surface allows the edge of the dust cover to enter the groove more smoothly during installation, reducing installation difficulty and time; the angle of the guide arc surface is controlled between 15° and 45°; too small an angle will make installation difficult, while too large an angle will affect the guiding and buffering effect.

[0008] According to one embodiment of the present invention, the depths of both groove I and groove II are 1-2 mm greater than the maximum depth of deformation of the dust cover edge.

[0009] In this technical solution, the depths of grooves I and II ensure that the dust cover edge can be fully embedded, while also allowing for a certain degree of elastic deformation under external force, thus preventing damage due to excessive compression. Furthermore, the shape of the grooves can be optimized, for example, by using arc-shaped or trapezoidal grooves. Arc-shaped grooves allow for more uniform contact between the dust cover edge and the groove, reducing stress concentration; trapezoidal grooves, on the other hand, limit the lateral movement of the dust cover edge to some extent.

[0010] According to one embodiment of the present invention, the edge portion of the dust cover is respectively secured in groove I and groove II by retaining rings.

[0011] In this technical solution, the retaining ring enhances the connection between the dust cover's edge and the groove, effectively preventing the dust cover from falling off due to vibration or other reasons during vehicle operation. The retaining ring is typically made of spring steel, which fits tightly between the groove and the dust cover's edge, using its own elasticity to firmly fix the dust cover in place, ensuring it will not loosen under various harsh working conditions.

[0012] According to one embodiment of the present invention, the dust cover is made of elastic material and includes an integrally formed rim, a spherical part, a transition part and a conical part.

[0013] In this technical solution, the dust cover made of elastic material can better adapt to the relative movement between the ball pin and the outer ball sleeve, providing excellent sealing performance and shock absorption. The one-piece molded structure avoids gaps between components, improving the overall structural strength and sealing of the dust cover and reducing the risk of failure due to component separation. Common elastic materials include rubber and silicone.

[0014] According to one embodiment of the present invention, the outer ball sleeve and the ball pin are subjected to an interference fit.

[0015] In this technical solution, the interference fit ensures a tight connection between the outer ball sleeve and the ball pin, thereby improving the overall structural strength of the automotive tie rod.

[0016] Compared with the prior art, this utility model has the following advantages: This invention provides a groove of a specific width on the surface of the outer ball sleeve and the tie rod, allowing the edge of the dust cover to be tightly embedded. By utilizing the limiting properties of the groove and the deformation characteristics of the dust cover, the dust cover is guaranteed to be stably connected under complex working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural schematic diagram of slot I.

[0019] In the diagram: 1. Pull rod; 2. Ball pin; 3. Outer ball sleeve; 4. Groove I; 5. Groove II; 6. Spherical part; 7. Conical part; 8. Transition part. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a groove to prevent the edge of the dust cover from falling off, applied to an automotive tie rod. It includes a tie rod 1, a ball pin 2, an outer ball sleeve 3, and a dust cover. The ball pin 2 expands along the end of the tie rod 1 and covers the outer ball sleeve 3. The dust cover is positioned between the ball pin 2 and the outer ball sleeve 3. The outer surface of the outer ball sleeve 3 has a groove I 4, and the outer surface of the tie rod 1 has a groove II 5. The dust cover has an edge portion that mates with groove I 4 and groove II 5. The width of both groove I 4 and groove II 5 is greater than the maximum thickness of the dust cover edge portion by 0.5 mm. The dust cover has a spherical portion 6 that mates with the outer ball sleeve 3 and a conical portion 7 that mates with the tie rod 1. A recessed transition portion 8 is provided between the spherical portion 6 and the conical portion 7.

[0022] like Figure 1 and Figure 2As shown, this technical solution provides grooves of a specific width on the surfaces of the outer ball sleeve 3 and the pull rod 1, allowing the edge of the dust cover to be tightly embedded. By utilizing the limiting effect of the grooves and the deformation characteristics of the dust cover, the dust cover is guaranteed to be stably connected under complex working conditions. At the same time, the unique spherical part 6, conical part 7, and transition part 8 of the dust cover conform to the shape of the components, enhance the sealing effect, and disperse stress, achieving the dual functions of preventing the edge of the dust cover from falling off and sealing it.

[0023] In addition, the slot for preventing the dust cover edge of the retaining ring from falling off, as described above, may also have the following additional technical features: According to one embodiment of the present invention, the sidewalls of the groove I4 and the groove II5 are provided with guide arc surfaces.

[0024] In this technical solution, the guide arc surface allows the edge of the dust cover to enter the groove more smoothly during installation, reducing installation difficulty and time; the angle of the guide arc surface is controlled between 15° and 45°; too small an angle will make installation difficult, while too large an angle will affect the guiding and buffering effect.

[0025] According to one embodiment of the present invention, the depths of both groove I4 and groove II5 are greater than the maximum deformation depth of the dust cover edge by 1-2 mm.

[0026] In this technical solution, the depths of grooves I4 and II5 ensure that the dust cover edge can be fully embedded, while also allowing for a certain degree of elastic deformation under external force, thus preventing damage due to excessive compression. Furthermore, the shape of the grooves can be optimized, for example, by using arc-shaped or trapezoidal grooves. Arc-shaped grooves allow for more uniform contact between the dust cover edge and the groove, reducing stress concentration; trapezoidal grooves, on the other hand, limit the lateral movement of the dust cover edge to some extent.

[0027] According to one embodiment of the present invention, the edge portion of the dust cover is respectively secured in groove I4 and groove II5 by retaining rings.

[0028] In this technical solution, the retaining ring enhances the connection between the dust cover's edge and the groove, effectively preventing the dust cover from falling off due to vibration or other reasons during vehicle operation. The retaining ring is typically made of spring steel, which fits tightly between the groove and the dust cover's edge, using its own elasticity to firmly fix the dust cover in place, ensuring it will not loosen under various harsh working conditions.

[0029] According to one embodiment of the present invention, the dust cover is made of elastic material and includes an integrally formed rim, a spherical part 6, a transition part 8, and a conical part 7.

[0030] In this technical solution, the dust cover made of elastic material can better adapt to the relative movement between the ball pin 2 and the outer ball sleeve 3, and has good sealing performance and shock absorption effect; the one-piece molded structure avoids gaps between the components, improves the overall structural strength and sealing of the dust cover, and reduces the risk of failure due to component separation. Common elastic materials include rubber and silicone.

[0031] According to one embodiment of the present invention, the outer ball sleeve 3 and the ball pin 2 are subjected to an interference fit.

[0032] In this technical solution, the interference fit ensures a tight connection between the outer ball sleeve 3 and the ball pin 2, thereby improving the overall structural strength of the automotive tie rod.

[0033] The usage process of the above embodiments is as follows: like Figure 1 and Figure 2 As shown, firstly, the maximum deformation value of the processed dust cover is measured using professional measuring tools. Then, the corresponding groove width is controlled, that is, the width of groove I4 and groove II5 is greater than the maximum thickness of the deformation at the edge of the dust cover by 0.5mm. This effectively ensures that the dust cover will not bulge out of the groove due to compression deformation after the product is installed, thus eliminating potential quality hazards.

[0034] Secondly, during operation, grooves of a specific width are carefully set on the surfaces of the outer ball sleeve 3 and the pull rod 1. This width is strictly greater than the maximum thickness of the dust cover edge deformation by 0.5mm. The guide arc surfaces of the side walls of grooves I 4 and II allow the dust cover edge to enter the groove more smoothly and accurately, reducing installation difficulty and time. The dust cover is made of elastic material and is integrally machined with the edge, spherical part 6, transition part 8, and conical part 7. The recessed transition part 8 between the spherical part 6 and the conical part 7 fits the shape of the component and works in conjunction with the groove of appropriate width to enhance sealing and distribute stress. After the dust cover edge is embedded in the groove, it is respectively secured in grooves I 4 and II by retaining rings. The retaining rings, with their own elasticity, firmly fix the dust cover within the appropriate width space, effectively preventing the dust cover from falling off due to vibration during vehicle operation, achieving the dual functions of preventing falling off and sealing.

[0035] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A groove for preventing the edge of a dust cover from falling off, applied to an automotive tie rod, comprising a tie rod (1), a ball pin (2), an outer ball sleeve (3), and a dust cover, wherein the ball pin (2) is expanded along the end of the tie rod (1), the ball pin (2) covers the outer ball sleeve (3), and the dust cover is disposed between the ball pin (2) and the outer ball sleeve (3), characterized in that, The outer surface of the outer ball sleeve (3) is provided with groove I (4), the outer surface of the pull rod (1) is provided with groove II (5), and the dust cover is provided with an edge portion that mates with groove I (4) and groove II (5); the width of groove I (4) and groove II (5) is greater than the maximum thickness of the edge portion of the dust cover by 0.5 mm; the dust cover is provided with a spherical part (6) that mates with the outer ball sleeve (3) and a conical part (7) that mates with the pull rod (1), and a recessed transition part (8) is provided between the spherical part (6) and the conical part (7).

2. The slot for preventing the dust cover edge of the retaining ring from falling off as described in claim 1, characterized in that, The sidewalls of groove I (4) and groove II (5) are provided with guide arc surfaces.

3. The slot for preventing the dust cover edge of the retaining ring from falling off as described in claim 1 or 2, characterized in that, The depths of groove I (4) and groove II (5) are both greater than the maximum depth of deformation of the dust cover edge by 1-2 mm.

4. The slot for preventing the dust cover edge of the retaining ring from falling off as described in claim 1, characterized in that, The rim of the dust cover is respectively secured in groove I (4) and groove II (5) by retaining rings.

5. The slot for preventing the dust cover edge of the retaining ring from falling off as described in claim 4, characterized in that, The dust cover is made of elastic material and includes an integrally formed rim, a spherical part (6), a transition part (8), and a conical part (7).

6. The slot for preventing the dust cover edge of the retaining ring from falling off as described in claim 1, characterized in that, The outer ball sleeve (3) and the ball pin (2) are fitted with an interference fit.

Images