Sealing dust cover of automobile spherical hinge

Abstract

The sealing dust cover of the automobile spherical hinge comprises a ball base, a ball pin column and a dust cover body, the ball pin column is installed on the ball base, the upper end of the dust cover body is connected to the outer portion of the ball pin column in a sleeving mode, and the lower end of the dust cover body is installed on a step of the ball base. The upper end of the outer portion of the step extends outwards to form a protruding portion, a clamping groove is formed between the protruding portion and the bottom end of the step, the bottom end of the dust cover body is concaved inwards to form a clamping portion, and the clamping portion and the clamping groove are matched in a clamping mode. The dustproof cover has the beneficial effects that when the dustproof cover main body is mounted, the clamping part at the bottom end of the dustproof cover main body is clamped into the clamping groove in the step, and the axial direction of the dustproof cover main body is limited under the clamping limiting action of the clamping part and the clamping groove, so that the mounting stability of the dustproof cover main body can be greatly improved; and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to a sealing dust cover of an automobile ball joint. Background Art

[0002] The ball joint structure is mainly distributed in the parts of the automobile chassis that need to transmit three degrees of rotational freedom. The rotation angle and swing angle of the ball pin are different in different parts. The spherical contact pair in the ball joint structure needs to maintain long-term lubrication and clean contact surface. However, this structure works at the bottom of the car for a long time and will be exposed to dust, mud, water, stones and other foreign objects. Therefore, this structure must be sealed and protected. Among the materials known so far, rubber materials can achieve large deformation flexibility and produce sealing elasticity with metal. Therefore, rubber materials are often used in the sealing of the dust cover body.

[0003] In the prior art, Figure 1 As shown, the bottom end of the dust cover body 2 is pressed into the step 3 of the ball base 1 for fixed installation. However, since the outer portion of the step 3 is smooth, the axial limiting ability of the dust cover body 2 is still not good enough, which makes it easy to fall off or separate during later use, affecting the sealing of the dust cover. For this reason, a sealed dust cover for an automobile ball joint is proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of the present application is to provide a sealing dust cover for an automobile ball joint.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a sealing dust cover for a car ball joint, comprising a ball base, a ball pin and a dust cover body, the ball pin is installed on the ball base, the upper end of the dust cover body is sleeved on the outside of the ball pin, the lower end of the dust cover body is installed on the step of the ball base, the outer upper end of the step extends outward to form a protrusion, a snap-in groove is formed between the protrusion and the bottom end of the step, the bottom end of the dust cover body is recessed inward to form a snap-in portion, and the snap-in portion and the snap-in groove form a snap-fit ​​fit.

[0006] Preferably, the bottom end of the clamping portion extends outward to form a contact portion, and the contact portion is suitable for increasing the contact area between the clamping portion and the bottom end of the step.

[0007] Preferably, the side of the clamping portion close to the clamping groove is bent inwardly to form an arc portion, so that the top and bottom ends of the arc portion abut against the clamping groove to form a first sealing portion and a second sealing portion.

[0008] Preferably, the top end of the clamping portion is tilted upward to form a first tilted portion, and the bottom end of the clamping portion is tilted downward to form a second tilted portion; when the clamping portion cooperates with the clamping groove, the first tilted portion and the second tilted portion are both elastically deformed, thereby driving the arc-shaped portion to elastically deform until it becomes a straight line structure and abuts against the clamping groove.

[0009] Preferably, a rounded structure is provided on the outer side of the raised portion so that the raised portion can reduce the hard pressing of the dust cover body.

[0010] Preferably, a reinforcing rib is provided in the middle portion of the outer side of the dust cover body.

[0011] Preferably, a frame is provided inside the upper end of the dust cover body, and the frame is made of metal.

[0012] Preferably, the upper end of the dust cover body has a sealing structure inside that matches the ball pin.

[0013] Preferably, the interior of the upper end of the dust cover body is in a wavy structure, so that the wave crests abut against the ball pin to form the sealing structure.

[0014] Preferably, an interference fit is formed between the upper end of the dust cover body and the ball pin to form the sealing structure.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] (1) The utility model is provided with a snap-fitting part and a snap-fitting groove. When the dust cover body is installed, the snap-fitting part at the bottom end of the dust cover body is snapped into the snap-fitting groove on the step. The axial direction of the dust cover body is limited by the snap-fitting limiting action of the snap-fitting part and the snap-fitting groove. This can greatly improve the installation stability of the dust cover body and thus improve the service life.

[0017] (2) The utility model reduces the size of the upper end of the dust cover body and increases the size of the lower end; this can reduce the contact stress at the lower end of the dust cover body and increase the service life; at the same time, the interference fit between the upper end of the dust cover body and the ball pin is increased, thereby improving the sealing performance.

[0018] (3) The utility model provides a metal frame, which can better match the dust cover body with the ball pin to ensure the service life of the seal. At the same time, it can also reduce defective products on the frame and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the existing dust cover and the ball base when assembled according to the utility model.

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the utility model.

[0022] Figure 4 It is a schematic structural diagram of the utility model when the dust cover main body and the ball base are separated.

[0023] Figure 5 It is a partial structural schematic diagram of the dust cover main body and the ball base of the utility model.

[0024] Figure 6 It is a schematic diagram of the main structure of the dust cover of the utility model.

[0025] In the figure: 1. ball base; 2. dust cover body; 3. step; 4. ball pin; 5. raised portion; 6. snap-in groove; 7. snap-in portion; 8. contact portion; 9. arc-shaped portion; 10. sealing structure; 11. reinforcing ribs; 12. frame. DETAILED DESCRIPTION

[0026] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0029] One of the preferred embodiments of the present application is as follows: Figures 1 to 6 As shown, a sealing dust cover of a car ball joint comprises a ball base 1, a ball pin 4 and a dust cover body 2. The ball pin 4 is mounted on the ball base 1, the upper end of the dust cover body 2 is sleeved on the outside of the ball pin 4, and the lower end of the dust cover body 2 is mounted on the step 3 of the ball base 1. Figure 4 and Figure 5As shown, a protrusion 5 is extended outward at the outer upper end of the step 3, a snap-in groove 6 is formed between the protrusion 5 and the bottom end of the step 3, and the bottom end of the dust cover body 2 is recessed inward to form a snap-in portion 7, and the snap-in portion 7 and the snap-in groove 6 form a snap-fit ​​fit.

[0030] It can be understood that when the dust cover body 2 is installed, the bottom end of the dust cover body 2 is pressed onto the step 3 so that the clamping portion 7 at the bottom end of the dust cover body 2 is clamped into the clamping groove 6 on the step 3. Figure 5 As shown in Figure (b), the axial direction of the dust cover body 2 is limited by the clamping and limiting action of the clamping portion 7 and the clamping groove 6, which can greatly improve the installation stability of the dust cover body 2 and thus increase the service life.

[0031] One of the embodiments of the present application is as follows: Figure 5 As shown in FIG. (a), the bottom end of the clamping portion 7 extends outward to form a contact portion 8. It should be noted that the contact portion 8 can increase the contact area between the clamping portion 7 and the bottom end of the step 3, so that when the clamping portion 7 is installed on the step 3, the contact portion 8 can provide a more stable support, thereby increasing the stability of the entire structure. At the same time, due to the increase in the contact area, the sealing performance of the dust cover body 2 and the ball base 1 can also be improved, thereby improving the sealing effect of the dust cover body 2.

[0032] Of course, the side of the clamping portion 7 and the clamping groove 6 are in planar contact, and the dust cover body 2 will deform during the movement of the ball pin 4. During the deformation process, it is easy to cause the side contact surfaces of the clamping portion 7 and the clamping groove 6 to separate irregularly, which will have a certain impact on the sealing.

[0033] In order to solve the above technical problems, one of the implementations of this application is as follows: Figure 5 As shown in Figure (a), the side of the snap-in portion 7 close to the snap-in groove 6 is bent inward to form an arc portion 9, so that the top and bottom ends of the arc portion 9 abut against the snap-in groove 6 to form a first sealing portion and a second sealing portion. In this way, no matter how the dust cover body 2 is deformed, the top and bottom ends of the arc portion 9 are in abutment with the snap-in groove 6, that is, the first sealing portion and the second sealing portion can achieve a good sealing of the side contact surfaces of the snap-in portion 7 and the snap-in groove 6 to prevent dust from entering.

[0034] Of course, due to the provision of the arc-shaped portion 9, there will be a gap between the side contact surfaces of the snap-fit ​​portion 7 and the snap-fit ​​groove 6, which will reduce the contact area between the dust cover body 2 and the ball base 1, and may further affect the installation stability of the dust cover body 2 to a certain extent.

[0035] In order to solve the above technical problems, one of the embodiments of the present application is as follows: Figure 5As shown in FIG. 7 (a), the top end of the clamping portion 7 is tilted upward to form a first tilted portion, and the bottom end of the clamping portion 7 is tilted downward to form a second tilted portion.

[0036] It can be understood that when the clamping portion 7 cooperates with the clamping groove 6, the first inclined portion will deform downward and abut against the bottom end of the protrusion 5 (the top inner wall of the clamping groove 6), and the second inclined portion will deform upward and abut against the bottom end of the step 3 (the bottom wall of the clamping groove 6). Due to the relative movement and deformation of the first inclined portion and the second inclined portion, the arc portion 9 of the curved structure can move toward the side wall of the clamping groove 6 until the arc portion 9 abuts against the side wall of the clamping groove 6 and presents a linear structure; Figure 5 As shown in Figure (b).

[0037] It should be known that the reaction force of the deformation of the first inclined portion and the second inclined portion can greatly improve the limiting capacity between the clamping portion 7 and the clamping groove 6, and at the same time, the deformation of the arc portion 9 can also fill the gap between the clamping groove 6, so that the sealing effect is not affected, thereby ensuring the stability and sealing of the entire dust cover body 2 during installation. In addition, this design can also effectively reduce the loosening phenomenon caused by vibration or external impact, thereby extending the service life of the dust cover body 2. In general, this structural design improves the reliability and safety of the device while ensuring the sealing performance.

[0038] like Figure 3 and Figure 4 As shown, during the deformation of the dust cover body 2, the deformation contact stress between the dust cover body 2 and the protrusion 5 is the largest. Therefore, in order to reduce the hard extrusion of the protrusion 5 on the dust cover body 2, a rounded structure can be provided on the outer side of the protrusion 5, so that the contact edge of the protrusion 5 becomes smoother, thereby reducing the stress concentration during the deformation process and improving the stability and durability of the dust cover body 2.

[0039] like Figure 3 As shown, at this time, the ball pin 4 is in a vertical state. Assuming that the ball pin 4 rotates greatly during use, the dust cover body 2 will be greatly deformed. For example, when the ball pin 4 rotates to the right to the limit position, the right side of the dust cover body 2 will be compressed and folded together, and the left side of the dust cover body 2 will be stretched. Since the upper and lower ends of the dust cover body 2 are both limited, the middle part of the left side of the dust cover body 2 will be stretched and deformed. It can be understood that the middle part of the left side of the dust cover body 2 will become "thin" at this time, and over time, the dust cover body 2 may be irreversibly deformed, thereby affecting the service life.

[0040] Therefore, in order to solve the above technical problems, one of the embodiments of the present application is as follows: Figure 6As shown, a reinforcing rib 11 can be provided in the middle of the outer side of the dust cover body 2, so that on the one hand the connection strength of the middle part of the dust cover body 2 can be improved, and on the other hand, during the process of tensile deformation of the middle part of the dust cover body 2, the reinforcing rib 11 can also deform to compensate for the thinned middle part, so that the shape change of the entire dust cover body 2 is more uniform, thereby improving its service life and stability, and ensuring that it still has good stability and durability under high-intensity use. Through this design, the performance of the dust cover can be effectively improved to meet the user's higher requirements for the equipment. Of course, the caliber of the lower end of the dust cover body 2 can also be increased to reduce the contact stress of the dust cover and improve the service life.

[0041] One of the embodiments of the present application is as follows: Figure 4 As shown, a skeleton 12 is provided inside the upper end of the dust cover body 2, which can increase the strength of the upper end of the dust cover body 2, and thus better cooperate with the ball pin 4 to achieve a better sealing effect. At the same time, it can compensate for the possible relaxation creep of the rubber after long-term use, thereby ensuring the service life of the seal.

[0042] Of course, the frame 12 in the prior art is generally made of plastic, while the frame 12 in the present application can be made of metal. It should be known that the use of a plastic frame dust cover has the following defects: 1. The nylon frame is easy to break during the vulcanization process, resulting in poor bonding; 2. The nylon frame needs to be boiled and parked before vulcanization (to increase the moisture content and improve toughness), resulting in low production efficiency; 3. The upper lip of the dust cover body 2 and the ball pin 4 are not sufficiently interfering, and muddy water seeps in during use, causing the ball pin to rust and the parts to fail. The use of a metal frame 12 can save these cumbersome processes, improve production efficiency and reduce manufacturing costs.

[0043] In this embodiment, Figure 4 As shown, a sealing structure 10 is provided inside the upper end of the dust cover body 2 to cooperate with the ball pin 4. The sealing structure 10 has various forms, including but not limited to the following two:

[0044] Form 1: Figure 4 and Figure 6 As shown, the interior of the upper end of the dust cover body 2 is in a wavy structure, that is, a plurality of lip sealing structures are formed. It can be understood that the plurality of lips can be seen as wave crests, and the lips can be seen as wave troughs, and the wave crests abut against the ball pin 4 to form a sealing structure 10.

[0045] Form 2: An interference fit is formed between the upper end of the dust cover body 2 and the ball pin 4, thereby forming a sealing structure 10. It can be understood that the diameter of the upper end of the dust cover body 2 is actually reduced, which can further reduce the interference between the dust cover body 2 (lip) and the ball pin 4, thereby further improving the sealing effect.

[0046] It should be noted that both forms can meet actual needs, but the combination of form one and form two is more effective.

[0047] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A sealing dust cover for an automobile ball joint, comprising: A ball base, a ball pin and a dust cover body, wherein the ball pin is installed on the ball base, the upper end of the dust cover body is sleeved on the outside of the ball pin, and the lower end of the dust cover body is installed on the step of the ball base, characterized in that: the outer upper end of the step extends outward to form a protrusion, a snap-in groove is formed between the protrusion and the bottom end of the step, the bottom end of the dust cover body is recessed inward to form a snap-in portion, and the snap-in portion and the snap-in groove form a snap-fit ​​fit.

2. The sealing dust cover of the automotive ball joint according to claim 1, characterized in that: The bottom end of the clamping portion extends outward to form a contact portion, and the contact portion is suitable for increasing the contact area between the clamping portion and the bottom end of the step.

3. The sealing dust cover of the automotive ball joint according to claim 2, characterized in that: The side of the clamping portion close to the clamping groove is bent inward to form an arc portion, so that the top end and the bottom end of the arc portion abut against the clamping groove to form a first sealing portion and a second sealing portion.

4. The sealing dust cover of the automotive ball joint according to claim 3, characterized in that: The top end of the clamping portion is tilted upward to form a first tilted portion, and the bottom end of the clamping portion is tilted downward to form a second tilted portion; when the clamping portion cooperates with the clamping groove, the first tilted portion and the second tilted portion are elastically deformed, thereby driving the arc-shaped portion to elastically deform until it becomes a straight line structure and abuts against the clamping groove.

5. The sealing dust cover of the automotive ball joint according to claim 4, characterized in that: The outer side of the protrusion is provided with a rounded structure so that the protrusion can reduce the hard pressing of the dust cover body.

6. The sealing dust cover of the automotive ball joint according to any one of claims 1 to 5, characterized in that: A reinforcing rib is arranged at the middle portion of the outer side of the dust cover body.

7. The sealing dust cover of the automotive ball joint according to claim 6, characterized in that: A frame is arranged inside the upper end of the dust cover body, and the frame is made of metal.

8. The sealing dust cover of the automotive ball joint according to claim 1, characterized in that: The upper end of the dust cover body is provided with a sealing structure matched with the ball pin.

9. The sealing dust cover of the automotive ball joint according to claim 8, characterized in that: The interior of the upper end of the dust cover body is in a wave-like structure, so that the wave crests abut against the ball pin to form the sealing structure.

10. The sealing dust cover of the automotive ball joint according to claim 8, characterized in that: The upper end of the dust cover body and the ball pin are interference fit to form the sealing structure.

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