Novel automobile steering outer ball head structure

Abstract

The utility model discloses a novel automobile steering outer ball head structure which comprises a ball head pin and a ball seat which are arranged in a ball head shell, a ball head of the ball head pin is arranged in the ball seat in a sleeved mode, the inner wall structure of the ball seat is matched with the ball head structure of the ball head pin, and a pin shaft of the ball head pin extends out of the ball head shell. An annular step coaxial with the ball seat is arranged on the lower side of the outer wall of the ball seat, a ball head face is arranged at the bottom of the outer wall of the ball seat, a supporting piece is arranged at the lower end of the ball seat and is of a ball bowl-shaped structure, an annular step groove matched with the annular step is formed in the upper end of the circumferential inner wall of the supporting piece, and the supporting piece is in interference fit with the annular step of the ball seat through the annular step groove. The bowl groove of the supporting piece is attached to the ball head face of the ball seat. A cover plate is fixedly arranged at an opening in the bottom end of the ball head shell, and a spring is arranged between the cover plate and the supporting piece. The utility model has the advantages of stable and reliable operation, simple structure, good sealing performance, long service life and the like, and avoids abnormal wear among all parts.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering ball joint technology, specifically a novel automotive steering ball joint structure. Background Technology

[0002] The outer ball joint is a key component of the steering system. One end is connected to the rack via an inner tie rod, and the other end is connected to the lever arm. It ensures that the wheels are precisely steered according to the driver's intention. As a force transmitter, the outer ball joint is subjected to a load force and undergoes oscillating and rotating movements during the car's steering process. Patent publication number CN203161820U discloses a ball joint assembly for an upper suspension of a car steering system. Specifically, it discloses a ball joint housing, a rear cover, a ball seat, and a ball pin. The rear cover is fixedly assembled at the bottom of the ball joint housing to form a mounting cavity. The ball heads of the ball seat and the ball pin are assembled in the mounting cavity. The ball head of the ball pin is assembled on the ball seat. An adjusting spring for automatically eliminating backlash is provided at the bottom of the mounting cavity. However, because the ball seat material is relatively soft, the contact area between the spring and the ball seat is small. The spring part is nested in the ball seat, resulting in a reduction in its compression and loss of spring function. This leads to problems such as poor operational stability, poor sealing, and short service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a new type of automotive steering outer ball joint structure that is stable and reliable in operation, simple in structure, has good sealing performance, avoids abnormal wear between components, and has a long service life, thus effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel automotive steering ball joint structure, comprising a ball joint pin and a ball seat disposed within a ball joint housing. The ball head of the ball joint pin is fitted within the ball seat, and the inner wall structure of the ball seat is adapted to the ball head structure of the ball joint pin. The pin shaft of the ball joint pin extends out of the ball joint housing. The lower side of the outer wall of the ball seat is provided with an annular step coaxially arranged therewith. The bottom of the outer wall of the ball seat is provided with a ball head surface. A support plate is provided at the lower end of the ball seat, and the support plate has a spherical cup-shaped structure. The upper end of the inner circumference of the support plate is provided with an annular step groove adapted to the annular step. The support plate is interference-fitted with the annular step of the ball seat through the annular step groove, and the cup groove of the support plate is in contact with the ball head surface of the ball seat. The bottom end of the ball joint housing is provided with an opening, and a cover plate is fixedly provided at the bottom opening of the ball joint housing. A spring is provided between the cover plate and the support plate.

[0005] Furthermore, the support plate is made of steel, and the spring is a conical spring.

[0006] Furthermore, the outer wall of the ball seat is a spherical structure, and a spherical gap is formed between the upper outer wall of the ball seat and the inner wall of the ball head shell; the ball head pin has a conical section at the intersection between its pin shaft and the ball head, and a sliding sealing sleeve is fitted on the ball head pin. The upper side of the sliding sealing sleeve is a conical flared section, and the lower side of the sliding sealing sleeve is a hollow hemispherical section. The conical flared section of the sliding sealing sleeve is attached to and bonded to the conical section of the ball head pin. The hollow hemispherical section of the sliding sealing sleeve is slidably fitted within the spherical gap, and a sealing ring is also provided on the inner wall of the ball head shell to fit and seal against the outer wall of the sliding sealing sleeve.

[0007] Furthermore, the ball seat has freely rotatable steel balls evenly nested on its circumferential outer wall, which is wrapped by a sliding sealing sleeve.

[0008] Furthermore, the sliding sealing sleeve is a split structure, comprising a left half sealing sleeve and a right half sealing sleeve that interlock with each other, and the left half sealing sleeve and the right half sealing sleeve have the same structure.

[0009] Furthermore, a dust cover is provided between the pin shaft of the ball head and the outer wall of the ball head housing.

[0010] Furthermore, the bottom of the cover plate is provided with a threaded hole, and an oil nozzle is screwed into the threaded hole; the support plate is provided with an oil injection hole two at the position corresponding to the oil outlet of the oil nozzle, and the ball seat is provided with an oil injection hole one at the position corresponding to the oil injection hole two.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The new automotive steering ball joint structure uses the elastic force applied by a spring to a rigid material support plate to ensure a tight fit between the ball seat and the ball head of the ball pin. This compensates for the gaps caused by wear between the ball seat and the ball pin during long-term operation, preventing looseness and abnormal noise. Furthermore, the large contact area between the support plate and the ball seat makes the ball seat less prone to deformation under the elastic force applied by the spring, ensuring the spring compression and guaranteeing the stability of the spring's action. The interference fit between the support plate and the ball seat effectively prevents relative movement between the ball seat and the support plate, thus avoiding any impact on the ball seat. Abnormal wear occurs; a double seal is provided between the ball joint pin and the upper opening of the ball joint housing through a sliding sealing sleeve and sealing ring, effectively preventing water from entering the ball joint housing due to gaps between the ball joint dust cover and the ball joint pin during long-term use, and effectively avoiding abnormal wear caused by rust on the ball joint pin; oil can be easily injected between the ball joint pin and the ball seat through the oil nozzle, oil injection hole one and oil injection hole two, ensuring continuous lubrication between the ball joint pin and the ball seat; this steering outer ball joint structure is stable and reliable in operation, simple in structure, good in sealing, avoids abnormal wear between components, and has a long service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a schematic diagram of the ball seat structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the support sheet structure of this utility model;

[0016] Figure 5 This is a schematic diagram of the sliding sealing sleeve structure of this utility model;

[0017] Figure 6 This is a cross-sectional view of the present invention;

[0018] Figure 7 This is an isometric sectional view of the internal structure of the ball head housing of this utility model.

[0019] In the diagram: 1. Ball head pin; 2. Ball head housing; 3. Ball seat; 31. Ball head surface; 32. Annular step; 33. Steel ball; 4. Support plate; 41. Annular step groove; 5. Spring; 6. Cover plate; 7. Ball head dust cover; 8. Sliding sealing sleeve; 81. Left half sealing sleeve; 82. Right half sealing sleeve; 9. Oil nozzle; 10. Sealing ring. 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] Please see Figure 1-7This utility model provides a technical solution: a novel automotive steering ball joint structure, including a ball pin 1 and a ball seat 3 disposed within a ball joint housing 2. The ball head of the ball pin 1 is fitted inside the ball seat 3, which is made of self-lubricating TPE material. The inner wall structure of the ball seat 3 is adapted to the ball head structure of the ball pin 1. The pin shaft of the ball pin 1 extends out of the ball joint housing 2. A ball pin dust cover 7 is provided between the pin shaft of the ball pin 1 and the outer wall of the ball joint housing 2, thereby sealing the upper opening between the ball pin 1 and the ball joint housing 2. The lower side of the outer wall of the ball seat 3 is provided with an annular step 32 coaxially arranged therewith. The outer wall of the ball seat 3 has a spherical structure, and a spherical gap is formed between the upper outer wall of the ball seat 3 and the inner wall of the ball head shell 2. The spherical part at the bottom of the outer wall of the ball seat 3 is divided into a ball head surface 31. A support plate 4 is provided at the lower end of the ball seat 3. The support plate 4 is made of steel and has a spherical cup structure. The upper end of the inner circumference of the support plate 4 is provided with an annular step groove 41 that matches the annular step 32. The support plate 4 is interference-fitted with the annular step 32 of the ball seat 3 through the annular step groove 41. The bowl groove of 4 fits against the ball head surface 31 of the ball seat 3; the bottom end of the ball head shell 2 is provided with an opening, and a cover plate 6 is fixedly provided at the bottom opening of the ball head shell 2. In this embodiment, the cover plate 6 is riveted to the bottom opening of the ball head shell 2. A spring 5 is provided between the cover plate 6 and the support plate 4. The spring 5 is a conical spring; the elastic force applied by the spring 5 to the support plate 4 ensures that the ball seat 3 and the ball head of the ball head pin 1 are always tightly fitted, which is used to compensate for the gap caused by wear between the ball seat 3 and the ball head pin 1 during long-term operation and to avoid looseness and abnormal noise; support plate 4 is made of hard material, and the cup groove of the support plate 4 fits and abuts against the ball head surface 31 of the ball seat 3. The contact area between the support plate 4 and the ball seat 3 is large, so that the ball seat 3 is not easily deformed when subjected to the elastic force applied by the spring 5, ensuring the compression of the spring 5 and avoiding direct contact between the spring 5 and the softer material ball seat 3. The spring 5 is partially nested in the ball seat 3, which reduces its compression and causes the spring 5 to lose its function. The interference fit between the support plate 4 and the ball seat 3 effectively avoids relative movement between the ball seat 3 and the support plate 4, which would cause abnormal wear of the ball seat 3.

[0022] The ball head pin 1 has a tapered section at the intersection between its shaft and the ball head. A sliding sealing sleeve 8 is fitted onto the ball head pin 1. The sliding sealing sleeve 8 is made of self-lubricating TPE material. The upper side of the sliding sealing sleeve 8 is a tapered flared section, and the lower side is a hollow hemispherical section. The tapered flared section of the sliding sealing sleeve 8 is attached to and bonded to the tapered section of the ball head pin 1. The hollow hemispherical section of the sliding sealing sleeve 8 is slidably fitted within the spherical gap. A sealing ring 10 is also provided on the inner wall of the ball head housing 2 to seal against the outer wall of the sliding sealing sleeve 8. The ball seat 3 is enclosed by the sliding sealing sleeve 8. The outer circumference of the ball head pin 1 is uniformly nested with freely rotating steel balls 33; the ball head pin 1 and the upper opening of the ball head shell 2 are sealed by the sliding sealing sleeve 8 and the sealing ring 10, which effectively prevents water from entering the ball head shell 2 due to the gap between the ball head pin dust cover 7 and the ball head pin 1 during long-term use, and effectively avoids abnormal wear caused by rust on the ball head pin 1; when the ball head pin 1 swings, the sliding sealing sleeve 8 swings accordingly, and the steel balls 33 reduce the friction between the sliding sealing sleeve 8 and the ball seat 3, thereby reducing the wear between the sliding sealing sleeve 8 and the ball seat 3.

[0023] The sliding sealing sleeve 8 is a split structure, comprising a left half sealing sleeve 81 and a right half sealing sleeve 82 that interlock with each other. The left half sealing sleeve 81 and the right half sealing sleeve 82 have the same structure. The sliding sealing sleeve 8 is set as a split structure, and the left half sealing sleeve 81 and the right half sealing sleeve 82 are interlocked and bonded together, which facilitates the assembly of the sliding sealing sleeve 8 with the ball head pin 1.

[0024] The bottom of the cover plate 6 is provided with a threaded hole, and an oil nozzle 9 is screwed into the threaded hole; the support plate 4 is provided with an oil injection hole 42 at the position corresponding to the oil outlet of the oil nozzle 9, and the ball seat 3 is provided with an oil injection hole 34 at the position corresponding to the oil injection hole 42; the oil nozzle 9, the oil injection hole 34 and the oil injection hole 42 facilitate the injection of oil between the ball head pin 1 and the ball seat 3, ensuring continuous lubrication between the ball head pin 1 and the ball seat 3.

[0025] The novel automotive steering ball joint structure disclosed in this embodiment utilizes the elastic force applied by the spring 5 to the rigid material support plate 4 to ensure a tight fit between the ball seat 3 and the ball head of the ball pin 1. This compensates for the gaps caused by wear between the ball seat 3 and the ball head pin 1 during long-term operation, preventing looseness and abnormal noise. Furthermore, the large contact area between the support plate 4 and the ball seat 3 prevents the ball seat 3 from deforming under the elastic force applied by the spring 5, ensuring the compression of the spring 5 and guaranteeing its stability. The interference fit between the support plate 4 and the ball seat 3 effectively prevents relative movement between the ball seat 3 and the support plate 4, thus avoiding any impact on the ball seat. 3. Abnormal wear occurs; the sliding sealing sleeve 8 and sealing ring 10 provide double sealing protection between the ball head pin 1 and the upper opening of the ball head housing 2, effectively preventing water from entering the ball head housing 2 due to gaps between the ball head dust cover 7 and the ball head pin 1 during long-term use, and effectively avoiding abnormal wear caused by rust on the ball head pin 1; the oil nozzle 9, oil injection hole 1 34 and oil injection hole 2 42 facilitate oil injection between the ball head pin 1 and the ball seat 3, ensuring continuous lubrication between the ball head pin 1 and the ball seat 3; this steering outer ball head structure is stable and reliable in operation, simple in structure, and has a long service life.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel automobile steering outer ball head structure, comprising a ball head pin and a ball seat arranged in a ball head shell, a ball head of the ball head pin is sleeved in the ball seat, an inner wall structure of the ball seat is matched with a ball head structure of the ball head pin, a pin shaft of the ball head pin extends out of the ball head shell, characterized in that: The lower side of the outer wall of the ball seat is provided with an annular step coaxially arranged with the outer wall, the bottom of the outer wall of the ball seat is provided with a ball head surface, the lower end of the ball seat is provided with a support sheet in a bowl-shaped structure, the upper end of the circumferential inner wall of the support sheet is provided with an annular step groove matched with the annular step, the support sheet is in interference fit with the annular step of the ball seat through the annular step groove, and the bowl groove of the support sheet is matched with the ball head surface of the ball seat.

2. A new type of automobile steering outer ball head structure according to claim 1, characterized in that: The support sheet is made of steel material, and the spring is a conical spring.

3. A new type of automobile steering outer ball head structure according to claim 1, characterized in that: The outer wall of the ball seat is in a spherical surface structure, and a spherical surface gap is formed between the outer wall of the upper side of the ball seat and the inner wall of the ball head shell.

4. A new type of automobile steering outer ball head structure according to claim 3, characterized in that: The intersection between the pin shaft and the ball head of the ball pin is provided with a conical surface section, a sliding sealing sleeve is sleeved on the ball pin, the upper side of the sliding sealing sleeve is a conical flared section, the lower side of the sliding sealing sleeve is a hollow hemispherical section, the conical flared section of the sliding sealing sleeve is matched and adhesively fixed with the conical surface section of the ball pin, the hollow hemispherical section of the sliding sealing sleeve is slidably sleeved in the spherical surface gap, and the inner wall of the ball head shell is further provided with a sealing ring matched and sealed with the outer wall of the sliding sealing sleeve.

5. A new type of automobile steering outer ball head structure according to claim 3, characterized in that: The circumferential outer wall of the ball seat wrapped by the sliding sealing sleeve is uniformly nested with steel balls which can freely rotate.

6. A new type of automobile steering outer ball head structure according to claim 1, characterized in that: The sliding sealing sleeve is in a split structure, and the sliding sealing sleeve comprises a left half sealing sleeve and a right half sealing sleeve which are mutually buckled.

7. A new type of automobile steering outer ball head structure according to claim 1, characterized in that: A ball pin dust cover is arranged between the pin shaft of the ball pin and the outer wall of the ball head shell. The bottom of the cover plate is provided with a threaded hole, and an oil nozzle is screwed in the threaded hole; the support sheet is provided with an oil injection hole two at a position corresponding to the oil outlet of the oil nozzle, and the ball seat is provided with an oil injection hole one at a position corresponding to the oil injection hole two.

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