Leakage type outer ball head pull rod

Abstract

The utility model provides a leakage type outer ball head pull rod, and belongs to the field of automobile suspension. The ball head pull rod comprises a shell, a ball seat, a ball pin and a dust cover, the shell is blocked through a sealing cover, the inner end of the ball pin is a spherical rotating body which is located in the shell, the outer end of the ball pin extends out of the upper end of the shell, the ball seat is located in the shell and abuts against the sealing cover, the rotating body is attached to the ball seat to rotate, and one end of the dust cover is fixed to the outer end of the ball pin. The other end of the dustproof cover is fixed to the shell, the protruding outer edge of the dustproof cover is an acting part, a plurality of hollow and elastic balloons are arranged in the dustproof cover and fixed to the inner wall of the acting part, the acting part is provided with a plurality of first through holes penetrating through the inner wall and the outer wall of the acting part, and each balloon is provided with a second through hole penetrating through the inner wall and the outer wall of the acting part. The first through holes are communicated with the second through holes, when the acting part is squeezed, the balloon can be squeezed together, and the number of the second through holes is equal to that of the first through holes. The pull rod prolongs the service life of the dust cover and reduces the breakage of the dust cover.

Description

Technical Field

[0001] The utility model belongs to the field of automobile suspension and relates to an external leakage type outer ball head pull rod. Background Art

[0002] The ball joint is an important component structure in the field of automobile suspension. The outer ball joint tie rod and the inner ball joint tie rod are connected to the steering gear. The outer ball joint tie rod is connected to the wheel hub, and the inner ball joint tie rod is connected to the outer ball joint tie rod. The outer ball joint tie rod (referred to as the outer ball joint) generally includes a shell, a ball seat, a ball pin, a cover and a dust cover.

[0003] The specific connection structure is as follows: the inner end of the ball pin is a sphere, the bottom of the sphere contacts the ball seat, and the sphere can rotate after being fixed. The upper and lower ends of the shell are both openings, and the ball seat and the sphere are both located in the shell. When installing, after the ball seat and the sphere are offset, the upper end of the ball pin extends from the lower end of the shell until the sphere and the ball seat are both located in the shell, and then the lower end opening of the shell is blocked by the cover, and the two ends of the dust cover are openings. The dust cover is set on the ball pin and is located at the upper end of the shell. The dust cover covers the upper end opening of the shell, which plays a role of dustproof and buffering. At present, the dust cover is easily affected by the shaking of the vehicle during driving and moves (the outermost edge is easily squeezed), and the ball pin will drive the upper end of the dust cover to move when it rotates (similarly, the outermost edge is also easily squeezed). In addition to the wear and aging of the dust cover, it is also a common problem that the dust cover is continuously stressed and causes rupture at the outermost edge, and dust enters after rupture, which is easy to cause ore volume over time. In the prior art, the above-mentioned problem has not been taken seriously, and the measure taken is to replace the entire piece. From the quality perspective, this is not conducive to improving the competitiveness of the company's products. In addition, the prior art also has the method of dispersing the impact force by increasing the number of folds of the dust cover, but the actual effect is poor, and the impact force always easily causes the dust cover to be damaged.

[0004] The utility model patent entitled "Ball head assembly with double-card structure" applied by the present applicant on December 3, 2018, records the ball head assembly with double-card structure, characterized in that the dust cover also has a lubrication structure, the lubrication structure includes an oil bag, the oil bag is fixedly connected to the inner wall of the dust cover, and when the ball pin rotates, the outer wall of the ball pin can squeeze the outer wall of the oil bag. Combined with the drawings in its specification, it can be seen that the ball head also uses a capsule structure similar to that in this scheme, but a careful reading of the scheme shows that the oil bag in this scheme is only similar in shape to the ball bag in this scheme, both of which are spherical, but their functions are completely different. There is lubricating oil inside the oil bag. When the ball pin moves, grease will be left in the oil bag to achieve lubrication. Its main function is to lubricate with the movement, while the present ball bag does not have the function of lubricating. Therefore, the two schemes are completely different. For details of the specific scheme, please refer to the invention content. Summary of the invention

[0005] The purpose of the utility model is to provide an external leakage type outer ball head pull rod to address the above-mentioned problems existing in the prior art. The external leakage type outer ball head pull rod increases the service life of the dust cover, reduces the occurrence of dust cover rupture, and improves the current problems of easy rupture of the dust cover and short service life.

[0006] The purpose of the utility model can be achieved through the following technical solutions: an external leakage type outer ball head pull rod, comprising a shell, a ball seat, a ball pin and a dust cover, the shell is open at the top and bottom and the lower end is blocked by a cover, the inner end of the ball pin is a spherical swivel and the swivel is located in the shell, the outer end of the ball pin extends from the upper end of the shell, the ball seat is located in the shell and abuts against the cover, the swivel fits the ball seat and rotates, one end of the dust cover is fixed to the outer end of the ball pin, and the other end of the dust cover is fixed to the shell, the protruding outer edge of the dust cover is an action part, characterized in that the dust cover has a plurality of hollow and elastic balloons, the balloons are fixed to the inner wall of the action part, the action part is provided with a plurality of through holes 1 penetrating its inner and outer walls, each of the balloons is also provided with a through hole 2 penetrating its inner and outer walls, the through hole 1 and the through hole 2 are connected, when the action part is squeezed, the balloon can be squeezed together, and the number of the through holes 2 is equal to the through hole 1.

[0007] The coordination between the ball pin, shell and ball seat in the present ball head assembly and the rotation principle of the ball pin are the same as those of the ball head assembly in the prior art. The outer end of the ball pin is connected to the castle bolt, and the connecting shaft extending from the shell is connected to the inner ball head pull rod, which will not be described in detail. The difference between the present ball head pull rod lies in the balloon and the pressure relief structure. As mentioned in the background technology, the action part is a continuous force-bearing area. After the balloon is arranged in the action part, the force on the action part will also be exerted on the balloon. The elasticity of the balloon is used to achieve impact buffering and reduce the squeezing of the action part. In addition, through hole one and through hole two are also provided in the present scheme. The two holes are provided to connect the inside of the balloon with the outside world. When the impact force is large, the hollow balloon may expand greatly or even explode. The hole design can achieve pressure relief. At the same time, the hole design will not affect the buffering function. Because the deformation of the balloon is an instantaneous behavior, the speed at which the balloon is compressed and deformed is much faster than the exhaust pressure relief. The impact force is not directly discharged from the hole structure, so that the balloon can play a role and protect the action part. The ball head pull rod is cleverly designed, making full use of the space inside the convex action part of the dust cover, playing a role in protecting the action part, extending the service life of the dust cover and stabilizing the ore volume.

[0008] In the above-mentioned external leakage type ball head pull rod, there are thickened protrusions on the inner walls of the corresponding ends of the balloon and the second through hole.

[0009] When the balloon is squeezed and deformed following the action part, the connecting end of the balloon and the action part has multiple layers of walls, so the thickness is large, and the impact force can be better buffered, further preventing the action part from rupturing. The other end has only a single layer of balloon wall, and the wall thickness can be increased by the raised part, thereby effectively protecting this end.

[0010] In the above-mentioned external leakage type outer ball head pull rod, the portion on the outer wall of the balloon connected to the inner wall of the action portion has an extension portion extending radially.

[0011] The extension part and the balloon are an integrated structure, and the extension part can increase the connection area between the balloon and the action part, thereby increasing the connection strength.

[0012] In the above-mentioned external leakage type outer ball head pull rod, the balloon has a cylindrical positioning portion, which extends from the second outer end of the through hole and can enter the first through hole.

[0013] The function of the positioning part is to facilitate the installation and positioning of the balloon. When the positioning part is inserted into the second through hole, it means that the position of the balloon and the action part is accurately positioned.

[0014] In the above-mentioned external leakage type ball head pull rod, the balloon is bonded to the inner wall of the action part.

[0015] The two can be connected by equipment injection molding or hot melting, which is the existing technology and will not be described in detail.

[0016] In the above-mentioned external leakage type outer ball head tie rod, the diameters of the through hole 1 and the through hole 2 are between 1mm and 2mm.

[0017] If the aperture is too large, the balloon will lose its tension and will not play a cushioning role. If the aperture is too small, it will easily lead to excessive pressure inside the balloon with nowhere to release pressure, thus causing the balloon to rupture.

[0018] An external leakage type external ball head pull rod includes a shell, a ball seat, a ball pin and a dust cover. The shell is open at the top and bottom and the lower end is sealed by a cover. The inner end of the ball pin is a spherical swivel and the swivel is located in the shell. The outer end of the ball pin extends from the upper end of the shell. The ball seat is located in the shell and abuts against the cover. The swivel rotates in contact with the ball seat. One end of the dust cover is fixed to the outer end of the ball pin, and the other end of the dust cover is fixed to the shell. The protruding outer edge of the dust cover is an action part, which is characterized in that there are a plurality of solid and elastic balloons in the dust cover, and the balloons are fixed to the inner wall of the action part. When the action part is squeezed, the balloons can be squeezed together.

[0019] In this solution, the balloon is solid, and there is no through hole 1 and through hole 2. The balloon moves together with the action part through the solid structure. This solution does not require the processing of the hole structure, which greatly reduces the difficulty of balloon processing and is more applicable in some areas with good road conditions.

[0020] In the above-mentioned external leakage type ball head pull rod, the ball bag and the dust cover are an integrated structure.

[0021] In practice, it can also be a split structure, and the two can be connected through subsequent processing.

[0022] In the above-mentioned external leakage type outer ball head pull rod, each of the balloons is connected by a connecting belt.

[0023] The connecting straps connect the individual balloons together, making installation easy.

[0024] In the above-mentioned external leakage type ball head pull rod, the ball bag and the dust cover are made of the same material.

[0025] They are all made of rubber material. The specific types of rubber are existing knowledge and will not be described in detail.

[0026] Compared with the existing technology, the external leakage type outer ball head pull rod has the following advantages:

[0027] 1. The external leakage type outer ball head pull rod realizes impact buffering through the elasticity of the balloon, reduces the extrusion of the action part, and the scheme also provides through hole 1 and through hole 2. The setting of the two holes enables the inside of the balloon to communicate with the outside world, realizing instant pressure relief of the impact.

[0028] 2. The external leakage type outer ball head pull rod makes full use of the space inside the convex action part of the dust cover, plays a role in protecting the action part, prolongs the service life of the dust cover, and stabilizes the ore volume.

[0029] 3. This external leakage type outer ball head pull rod has two schemes: hollow and solid. The structure is ingenious and suitable for different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural cross-sectional view of the external leakage type outer ball head pull rod (when the balloon is a hollow structure).

[0031] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0032] List of Reference Numerals

[0033] In the figure:

[0034] 1. Shell;

[0035] 2. Tee;

[0036] 3. Ball pin;

[0037] 3a. Turn;

[0038] 4. Dust cover;

[0039] 4a, action part;

[0040] 4b, through hole 1;

[0041] 5. Capping;

[0042] 6. Balloon;

[0043] 6a, through hole 2;

[0044] 6b, raised portion;

[0045] 6c, extension;

[0046] 6d, positioning part;

[0047] 7. Connecting belt. DETAILED DESCRIPTION

[0048] Embodiment 1

[0049] like Figure 1 and Figure 2As shown, the leakage type outer ball head pull rod comprises a shell 1, a ball seat 2, a ball pin 3 and a dust cover 4. The shell 1 is opened at the top and bottom and the lower end is blocked by a cover 5. The inner end of the ball pin 3 is a spherical swivel 3a and the swivel 3a is located in the shell 1. The outer end of the ball pin 3 extends from the upper end of the shell 1. The ball seat 2 is located in the shell 1 and abuts against the cover 5. The swivel 3a fits the ball seat 2 and rotates. One end of the dust cover 4 is fixed to the outer end of the ball pin 3, and the other end of the dust cover 4 is fixed to the shell 1. The protruding outer edge of the cover 4 is the action part 4a. The dust cover 4 has a plurality of hollow and elastic balloons 6. The balloons 6 are fixed to the inner wall of the action part 4a. The action part 4a is provided with a plurality of through holes 1 4b penetrating its inner and outer walls. Each balloon 6 is also provided with a through hole 2 6a penetrating its inner and outer walls. The through hole 1 4b is connected to the through hole 2 6a. When the action part 4a is squeezed, the balloons 6 can be squeezed together. The number of through holes 2 6a is equal to the number of through holes 1 4b. The cooperation between the ball pin 3, the shell 1 and the ball seat 2 in the present ball head assembly and the rotation principle of the ball pin 3 are the same as those of the ball head assembly in the prior art. The outer end of the ball pin 3 is connected to the castle bolt, and the connecting shaft extending from the shell 1 is connected to the inner ball head tie rod. The details are not repeated here. The difference of this ball head pull rod lies in the balloon 6 and the pressure relief structure. As mentioned in the background technology, the action part 4a is a continuous force-bearing area. After the balloon 6 is set in the action part 4a, the force on the action part 4a will also be caused by the balloon 6. The elasticity of the balloon 6 is used to achieve impact buffering, reducing the extrusion of the action part 4a. In addition, a through hole 1 4b and a through hole 2 6a are also set in this scheme. The setting of the two holes makes the inside of the balloon 6 communicate with the outside world. When the impact force is large, the hollow balloon 6 may expand greatly or even explode. The hole design can achieve pressure relief. At the same time, the hole design will not affect the buffering function. Because the deformation of the balloon 6 is an instantaneous behavior, the speed at which the balloon 6 is compressed and deformed is much faster than the exhaust pressure relief. The impact force is not directly discharged from the hole structure, so that the balloon 6 can play a role and protect the action part 4a. The design of this ball head pull rod is ingenious, making full use of the space inside the protruding action part 4a on the dust cover 4, playing a role in protecting the action part 4a, extending the service life of the dust cover 4, and stabilizing the ore volume.

[0050] The inner wall of the corresponding end of the balloon 6 and the through hole 6a is provided with a thickened protrusion 6b. When the balloon 6 follows the action part 4a to be squeezed and deformed, the connection end of the balloon 6 and the action part 4a has a multi-layer wall, so the thickness is large, and the impact force can be better buffered, further preventing the action part 4a from rupturing, while the other end has only a single-layer wall of the balloon 6, and the wall thickness can be increased by the protrusion 6b, so that the end is effectively protected. The outer wall of the balloon 6 is provided with a radially extending extension 6c at the place connected to the inner wall of the action part 4a. The extension 6c and the balloon 6 are an integral structure, and the extension 6c can increase the connection area between the balloon 6 and the action part 4a, thereby increasing the connection strength. The balloon 6 has a cylindrical positioning portion 6d, which extends from the outer end of the through hole 6a, and the positioning portion 6d can enter the through hole 4b. The function of the positioning portion 6d is to facilitate the installation and positioning of the balloon 6. When the positioning portion 6d is inserted into the through hole 6a, it means that the position of the balloon 6 and the action part 4a is accurately positioned. The balloon 6 is bonded to the inner wall of the action part 4a. The two can be connected by equipment injection molding or hot melting, which is a prior art and will not be described in detail. The aperture of the through hole 1 4b and the through hole 2 6a is 1.5mm. If the aperture is too large, the tension of the balloon 6 will be lost, and it will not play a buffering role. If the aperture is too small, it will easily cause the pressure in the balloon 6 to be too large and there will be no place to release the pressure, thereby causing the balloon 6 to rupture. Each balloon 6 is connected by a connecting belt 7. The connecting belt 7 connects each balloon 6 together to facilitate installation. The balloon 6 is made of the same material as the dust cover 4. They are all made of rubber materials. The specific rubber type is existing knowledge and will not be described in detail.

[0051] Embodiment 2

[0052] The difference between this solution and the first embodiment is that the dust cover 4 has several solid and elastic balloons 6, and the balloons 6 are fixed to the inner wall of the action part 4a. When the action part 4a is squeezed, the balloons 6 can be squeezed together. In this solution, the balloon 6 is solid, and there is no through hole 1 4b and through hole 2 6a. It moves with the action part 4a only through the solid structure. This solution does not require the processing of the hole structure, and the difficulty of processing the balloon 6 is greatly reduced. It is more applicable in some areas with good road conditions. The balloon 6 and the dust cover 4 are an integrated structure. In practice, it can also be a split structure, and the two are connected through subsequent processing.

[0053] The detailed structures, specific component sizes and principles not mentioned in the present application documents are all common knowledge or can be obtained by those skilled in the art through simple selection, and will not be elaborated on.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An external leakage type outer ball head pull rod, comprising a shell, a ball seat, a ball pin and a dust cover, wherein the shell is open at the top and bottom and the lower end is sealed by a cover, the inner end of the ball pin is a spherical swivel and the swivel is located in the shell, the outer end of the ball pin extends from the upper end of the shell, the ball seat is located in the shell and abuts against the cover, the swivel is fitted to the ball seat and rotates, one end of the dust cover is fixed to the outer end of the ball pin, and the other end of the dust cover is fixed to the shell, the protruding outer edge of the dust cover is the action part, and it is characterized in that: The dust cover has a plurality of hollow and elastic balloons, which are fixed to the inner wall of the action part. The action part is provided with a plurality of through holes 1 penetrating the inner and outer walls thereof. Each of the balloons is also provided with a through hole 2 penetrating the inner and outer walls thereof. The through hole 1 and the through hole 2 are connected. When the action part is squeezed, the balloons can be squeezed together. The number of the through holes 2 is equal to the number of the through holes 1.

2. The external leakage type outer ball head tie rod according to claim 1, characterized in that: The inner wall of the corresponding end of the balloon and the second through hole is provided with a thickened convex part.

3. The external leakage type outer ball head tie rod according to claim 1, characterized in that: The portion of the outer wall of the balloon connected to the inner wall of the action portion is provided with an extension portion extending radially.

4. The external leakage type outer ball head tie rod according to claim 1, characterized in that: The balloon is provided with a cylindrical positioning portion, which extends from the second outer end of the through hole and can enter the first through hole.

5. The external leakage type outer ball head tie rod according to claim 1, characterized in that: The balloon is bonded to the inner wall of the action portion.

6. The leakage-type outer ball head tie rod according to claim 1, characterized in that: The diameters of the through hole 1 and the through hole 2 are between 1 mm and 2 mm.

7. An external leakage type outer ball head pull rod, comprising a shell, a ball seat, a ball pin and a dust cover, wherein the shell is open at the top and bottom and the lower end is sealed by a cover, the inner end of the ball pin is a spherical swivel and the swivel is located in the shell, the outer end of the ball pin extends from the upper end of the shell, the ball seat is located in the shell and abuts against the cover, the swivel is fitted to the ball seat and rotates, one end of the dust cover is fixed to the outer end of the ball pin, and the other end of the dust cover is fixed to the shell, the protruding outer edge of the dust cover is the action part, and it is characterized in that The dust cover is provided with a plurality of solid and elastic balloons, which are fixed to the inner wall of the action part. When the action part is squeezed, the balloons can be squeezed together.

8. The external leakage type outer ball head tie rod according to claim 7, characterized in that: The balloon and the dust cover are an integrated structure.

9. The external leakage type outer ball head tie rod according to any one of claims 1 to 8, characterized in that: The balloons are connected via connecting bands.

10. The external leakage type outer ball head tie rod according to any one of claims 1 to 8, characterized in that: The balloon is made of the same material as the dust cover.

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