Ball head pull rod based on buffer structure

Abstract

The utility model provides a ball head pull rod based on a buffer structure, and belongs to the field of automobile suspension. The ball head pull rod based on the buffer structure comprises a shell, a ball seat, a sealing cover and a ball pin, the upper portion and the lower portion of the shell are open, the sealing cover is arranged at the lower end of the shell, the ball seat is located in the shell, the bottom of the ball pin abuts against the ball seat, the top of the ball pin extends out of the upper end of the shell, the lower end of the shell extends downwards, and a buffer cavity is formed between the ball seat and the lower end of the shell. A through hole is formed in the shell, a screwing piece is screwed on the through hole, the screwing piece blocks the through hole, the screwing piece can enter or leave the shell after the screwing piece is rotated, a buffer spring is arranged between the screwing piece and the ball seat, when the screwing piece enters the shell, the buffer spring is compressed, and when the screwing piece leaves the shell, the buffer spring is reset; and the circumferential limiting structure can limit the circumferential movement of the screwing piece. The ball head pull rod based on the buffer structure is favorable for adjusting the buffer performance.

Description

Technical Field

[0001] The utility model belongs to the field of automobile suspension and relates to a ball head pull rod based on a buffer structure. Background Art

[0002] The ball head tie rod is an important component of the automobile suspension system. Structurally, it includes a housing, a ball pin, a ball seat, a cover and other components. The specific structure and connection method are not described in detail and are prior art.

[0003] The applicant has made a number of structural innovations and improvements to the ball head tie rod. For example, in order to improve the buffering performance of the tie rod, the applicant has applied for a utility model patent with patent number 2023225162989, entitled Automobile Ball Head Tie Rod, which records an automobile ball head tie rod, including a base and a vertically arranged ball head pin, the lower end of the ball head pin is a sphere, a mounting hole is vertically penetrated on the base, a ball seat is provided in the mounting hole, a ball head cavity for accommodating the ball is formed between the upper side of the ball seat and the inner wall of the mounting hole, and the outer sleeve of the ball head pin has The dust cover, the lower end of the dust cover is fixedly connected to the base, a cover body is provided below the base, a spring is provided in the cover body, the two ends of the spring act on the bottom wall of the cover body and the bottom wall of the ball seat respectively, an annular positioning seat is formed on the outer wall of the upper end of the cover body, and the positioning seat is coaxial with the cover body; an annular gasket is provided on the upper side of the positioning seat, and the two end surfaces of the annular gasket are respectively pressed tightly on the top wall of the positioning seat and the base; the cover body is fixedly connected to the base through the rod portion passing through the positioning seat and the annular gasket in turn and screwed into the screws in the base, and there are multiple screws and they are evenly distributed along the circumference of the cover body. The above scheme can adjust the position of the cover body by changing the thickness of the gasket, and change the support strength of the spring on the ball seat by adjusting the compression amount of the spring, so that the contact between the ball seat and the ball is within a reasonable range (neither excessive contact nor too loose contact), which is not only convenient for assembly, but also can reduce the processing and assembly accuracy of each component, and reduce the difficulty of producing the ball head tie rod. Combined with other contents of the specification and the drawings, it can be seen that the change in the buffering performance in the above scheme is achieved by changing the thickness of the gasket. Specifically, it is necessary to manually reduce the thickness of the gasket (paragraph 0029 of the specification). Manually reducing the thickness of the gasket requires removing the screws, which is troublesome to operate. In addition, there is also the problem of uncontrollable operation in reducing the thickness of the gasket. Strictly speaking, the above scheme is not technically mature and needs to be improved. Summary of the invention

[0004] The purpose of the utility model is to address the above-mentioned problems existing in the prior art and to provide a ball head pull rod based on a buffer structure. The ball head pull rod based on the buffer structure is conducive to adjusting the buffer performance and solves the problems of the current ball head pull rod buffer technology being immature and the adjustment being difficult.

[0005] The objectives of the utility model can be achieved through the following technical solutions: a ball head pull rod based on a buffer structure, comprising a shell, a ball seat, a cover and a ball pin, the shell being open at the top and bottom and having a cover at the lower end, the ball seat being located in the shell, the bottom of the ball pin being against the ball seat, and the top of the ball pin extending from the upper end of the shell, characterized in that the lower end of the shell extends downward, a buffer cavity is formed between the ball seat and the lower end of the shell, the cover having a through opening through which a screw connection is screwed, the screw connection blocking the through opening, and the screw connection can enter or leave the shell after rotating the screw connection, a buffer spring being provided between the screw connection and the ball seat, when the screw connection enters the shell, the buffer spring is compressed, and when the screw connection leaves the shell, the buffer spring is reset, and also includes a circumferential limiting structure, which can limit the circumferential movement of the screw connection.

[0006] The bottom of the ball pin is a spherical ball, the two ends of the shell are openings, the ball seat is located in the shell and the ball seat has a spherical inner wall, and the above content is the prior art. In this scheme, the length of the shell is extended as a whole, and the extension structure is to form a buffer cavity. The ball seat in this case is different from the ball seat in the traditional ball head pull rod. The ball seat of the traditional structure is positioned against the cover. In this case, the ball seat and the cover are not in contact, and there is a buffer cavity separated between them. The buffer cavity can be used to install the buffer spring. The cover is provided with a through hole to install the screw connector. The compression or reset extension of the buffer spring is controlled by rotating the screw connector. There is no need to remove and grind the gasket like in the prior art. It is very convenient, and the buffer spring is adjusted by rotating the screw connector, and the precision control is strong. After the adjustment is completed, the rotational movement of the screw connector is limited by the circumferential limiting structure to prevent the screw connector from rotating by itself when the vehicle vibrates. The ball seat is M-shaped as a whole, and its outer wall is deep enough. Therefore, when the ball seat is forced to move up and down, it basically does not roll over, and the straight up and down movement is stable.

[0007] The above-mentioned ball head pull rod based on the buffer structure also includes a block cover, the bottom of the ball seat has a downwardly protruding cylindrical positioning portion, the top of the block cover has a circular ring-shaped positioning groove, the positioning portion is engaged in the positioning groove, the bottom of the block cover has a circular ring-shaped limiting groove, and the upper end of the buffer spring is located in the limiting groove.

[0008] One of the functions of the blocking cover is to position the upper end of the buffer spring.

[0009] In the above-mentioned ball head pull rod based on the buffer structure, the positioning portion is threadedly connected or tightly fitted in the positioning groove.

[0010] In the above-mentioned ball head pull rod based on the buffer structure, the screw connection is in a T-shaped structure, including a head and a tail both of which are cylindrical. The outer wall of the head is screwed on the through-opening, and the bottom of the baffle has a downwardly extending column. The end of the tail is provided with an axially distributed socket, and the column can enter the socket. The lower end of the buffer spring abuts against the upper end of the head.

[0011] The head realizes the threaded connection with the through-hole, and the tail is used to form a socket for inserting the plug. After adjusting the screw connection, the plug enters or leaves the socket. When entering, the buffer spring is compressed, and when leaving, the buffer spring resets and extends. The design of the plug and the socket can enhance the stability of the up and down movement of the ball seat on the one hand, because the plug and the socket limit the movement except the axial direction after the cooperation, and on the other hand, it also limits the maximum buffer distance, which can prevent the ball seat and the cover from being instantly impacted and contacted by excessive force (that is, due to the existence of the tail and the plug, there is an obstacle between the ball seat and the cover, and the two cannot be completely in contact), playing a certain protective role.

[0012] In the above-mentioned ball head pull rod based on the buffer structure, the thickness of the head is smaller than the thickness of the through-opening.

[0013] The screw connection has more adjustment travel.

[0014] In the above-mentioned ball head pull rod based on the buffer structure, a cross hole is provided at the center of the lower end of the head.

[0015] In practice, other hole types may be used, and the screw connection may be rotated by a tool.

[0016] In the above-mentioned ball head pull rod based on the buffer structure, the circumferential limiting structure includes a limit head, a limit opening and a limit pin. The limit head is located on the lower end of the head and is provided with an insertion opening. The limit opening is provided on both sides of the through opening. The limit pin can enter from the limit opening on one side, pass through the insertion opening, and exit from the limit opening on the other side.

[0017] The outer end of the limiting opening passes through the outer wall of the cover, and the inner end passes through the inner wall of the opening. The limiting pin can be bent under external force. When the limiting pin is connected to the limiting head and the limiting opening, the circumferential movement of the screw connection is realized. The circumferential movement of the screw connection can be restored by using tools such as pliers to straighten the limiting pin and then remove it.

[0018] In the above-mentioned ball head pull rod based on the buffer structure, the inner end of the through-hole has an axially extending extended ring edge, and the inner wall of the extended ring edge has a thread.

[0019] The purpose of extending the rim is to increase the thickness of the through opening.

[0020] Compared with the prior art, the ball head pull rod based on the buffer structure has the following advantages:

[0021] 1. The ball head pull rod based on the buffer structure controls the compression or reset extension of the buffer spring by rotating the screw connection, without the need for complicated disassembly work, and at the same time has a circumferential limiting structure to prevent unnecessary circumferential rotation.

[0022] 2. The design of the plug at the tail of the screw connection and the blocking cover in the ball head tie rod based on the buffer structure plays a role in enhancing the stability of the ball seat and limiting the maximum buffer distance, and the design is well considered.

[0023] 3. The ball head pull rod based on the buffer structure makes full use of the existing M-shaped ball seat structure, changes the contact mode between the ball seat and the cover, realizes a non-disassembly adjustment mode, has controllable accuracy and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural cross-sectional view of the ball head pull rod based on the buffer structure.

[0025] Figure 2 yes Figure 1 A magnified view of the structure in area A.

[0026] List of Reference Numerals

[0027] In the figure:

[0028] 1. Shell;

[0029] 2. Tee;

[0030] 2a, positioning part;

[0031] 3. Capping;

[0032] 3a, through-mouth;

[0033] 3a1, limited penetration;

[0034] 3a2, extended ring edge;

[0035] 4. Ball pin;

[0036] 5. Buffer chamber;

[0037] 6. Screw-on parts;

[0038] 6a. Head;

[0039] 6a1, cross hole;

[0040] 6a2, limit head;

[0041] 6a2a, insertion port;

[0042] 6b, tail;

[0043] 6b1, jack;

[0044] 7. Buffer spring;

[0045] 8. Cover;

[0046] 8a, positioning groove;

[0047] 8b, limit groove;

[0048] 8c. Insert the post. DETAILED DESCRIPTION

[0049] like Figure 1 and Figure 2 As shown, the ball head pull rod based on the buffer structure includes a shell 1, a ball seat 2, a cover 3 and a ball pin 4. The shell 1 is open at the top and bottom and has a cover 3 at the lower end. The ball seat 2 is located in the shell 1, and the bottom of the ball pin 4 is against the ball seat 2. The top of the ball pin 4 extends from the upper end of the shell 1, and the lower end of the shell 1 extends downward. A buffer cavity 5 is formed between the ball seat 2 and the lower end of the shell 1. The cover 3 has a through hole 3a, and a screw connection 6 is screwed on the through hole 3a. The screw connection 6 blocks the through hole 3a. After the screw connection 6 is rotated, the screw connection 6 can enter or leave the shell 1. A buffer spring 7 is provided between the screw connection 6 and the ball seat 2. When the screw connection 6 enters the shell 1, the buffer spring 7 is compressed, and when the screw connection 6 leaves the shell 1, the buffer spring 7 is reset. A circumferential limiting structure is also included, and the circumferential limiting structure can limit the circumferential movement of the screw connection 6. The bottom of the ball pin 4 is a spherical ball, the two ends of the shell 1 are open, the ball seat 2 is located in the shell 1 and the ball seat 2 has a spherical inner wall, and the above content is the prior art. In this solution, the length of the shell 1 is extended as a whole, and the extension structure is to form a buffer cavity 5. The ball seat 2 in this case is different from the ball seat 2 in the traditional ball head pull rod. The ball seat 2 of the traditional structure is positioned against the cover 3. In this case, the ball seat 2 and the cover 3 are not in contact, and there is a buffer cavity 5 separated between them. The buffer cavity 5 can be used to install the buffer spring 7. The cover 3 is provided with a through opening 3a to install the screw 6. The compression or reset extension of the buffer spring 7 is controlled by rotating the screw 6. There is no need to remove and grind the gasket like in the prior art, which is very convenient. The buffer spring 7 is adjusted by rotating the screw 6, and the precision control is strong. After the adjustment is completed, the rotational movement of the screw 6 is limited by the circumferential limiting structure to prevent the screw 6 from rotating by itself when the vehicle vibrates. The ball seat 2 is M-shaped as a whole, and its outer wall has sufficient depth, so when the ball seat 2 is subjected to force and moves up and down, it basically does not tip over, and the straight up and down movement is stable.

[0050] It also includes a stopper 8. The bottom of the ball seat 2 has a downwardly protruding cylindrical positioning portion 2a. The top of the stopper 8 has a circular ring-shaped positioning groove 8a. The positioning portion 2a fits in the positioning groove 8a. The bottom of the stopper 8 has a circular ring-shaped limiting groove 8b. The upper end of the buffer spring 7 is located in the limiting groove 8b. One of the functions of the stopper 8 is to position the upper end of the buffer spring 7. The positioning portion 2a is threaded or tightly fitted in the positioning groove 8a. The screw connector 6 is a T-shaped structure, including a head 6a and a tail 6b, both of which are cylindrical. The outer wall of the head 6a is screwed on the through opening 3a. The bottom of the stopper 8 has a plug 8c extending downward. The end of the tail 6b is provided with an axially distributed plug hole 6b1. The plug 8c can enter the plug hole 6b1. The lower end of the buffer spring 7 abuts against the upper end of the head 6a. The head 6a realizes the threaded connection with the through-hole 3a, and the tail 6b is used to form the plug hole 6b1 to insert the plug 8c. After adjusting the screw connector 6, the plug 8c enters or leaves the plug hole 6b1. When entering, the buffer spring 7 is compressed, and when leaving, the buffer spring 7 is reset and extended. The design of the plug 8c and the plug hole 6b1 can enhance the stability of the up and down movement of the ball seat 2 on the one hand, because the plug 8c and the plug hole 6b1 limit the movement except the axial direction after the cooperation, and on the other hand, it also limits the maximum buffer distance, which can prevent the ball seat 2 and the cover 3 from being instantly impacted and contacted by excessive force (that is, due to the existence of the tail 6b and the plug 8c, there is an obstacle between the ball seat 2 and the cover 3, and the two cannot be completely in contact), playing a certain protective role. The thickness of the head 6a is less than the thickness of the through-hole 3a. The screw connector 6 has more adjustment strokes.

[0051] There is a straight hole at the center of the lower end of the head 6a. In practice, other hole types can be used, and the screw connection 6 can be rotated by using a tool. The circumferential limiting structure includes a limit head 6a2, a limit opening 3a1 and a limit pin. The limit head 6a2 is located on the lower end of the head 6a and is provided with an insertion port 6a2a. The limit opening 3a1 is provided on both sides of the through opening 3a. The limit pin can be inserted from the limit opening 3a1 on one side, pass through the insertion port 6a2a, and pass out from the limit opening 3a1 on the other side. The outer end of the limit opening 3a1 passes through the outer wall of the cover 3, and the inner end passes through the inner wall of the through opening 3a. The limit pin can be bent under external force. When the limit pin is connected to the limit head 6a2 and the limit opening 3a1, the circumferential movement of the screw connection 6 is realized. The limit pin can be straightened and taken out by using a tool such as pliers to restore the circumferential movement of the screw connection 6. The inner end of the through-hole 3a has an axially extending extension ring edge 3a2, and the inner wall of the extension ring edge 3a2 has a thread. The extension ring edge 3a2 is for increasing the thickness of the through-hole 3a.

[0052] 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.

[0053] 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. A ball head pull rod based on a buffer structure comprises a shell, a ball seat, a cover and a ball pin, wherein the shell is open at the top and bottom and has a cover at the lower end, the ball seat is located in the shell, the bottom of the ball pin abuts against the ball seat, and the top of the ball pin extends from the upper end of the shell, characterized in that: The lower end of the shell extends downward, and a buffer cavity is formed between the ball seat and the lower end of the shell. The cover has a through-hole, and a screw connection is screwed on the through-hole. The screw connection blocks the through-hole, and the screw connection can enter or leave the shell after rotating. A buffer spring is provided between the screw connection and the ball seat. When the screw connection enters the shell, the buffer spring is compressed, and when the screw connection leaves the shell, the buffer spring is reset. The cover also includes a circumferential limiting structure, and the circumferential limiting structure can limit the circumferential movement of the screw connection.

2. The ball head pull rod based on the buffer structure according to claim 1 is characterized in that: It also includes a blocking cover, the bottom of the ball seat has a downwardly protruding cylindrical positioning portion, the top of the blocking cover has a circular ring-shaped positioning groove, the positioning portion fits in the positioning groove, the bottom of the blocking cover has a circular ring-shaped limiting groove, and the upper end of the buffer spring is located in the limiting groove.

3. The ball head pull rod based on the buffer structure according to claim 2 is characterized in that: The positioning portion is threadedly connected or tightly fitted in the positioning groove.

4. The ball head pull rod based on the buffer structure according to claim 2, characterized in that: The screw connection is in a T-shaped structure, including a head and a tail both of which are cylindrical. The outer wall of the head is screwed on the through-hole. The bottom of the blocking cover has a downwardly extending plug. The end of the tail is provided with an axially distributed plug hole, and the plug can enter the plug hole. The lower end of the buffer spring abuts against the upper end of the head.

5. The ball head pull rod based on the buffer structure according to claim 4, characterized in that: The thickness of the head portion is smaller than the thickness of the through-hole.

6. The ball head pull rod based on the buffer structure according to claim 4, characterized in that: A cross hole is provided at the center of the lower end of the head.

7. The ball head pull rod based on the buffer structure according to claim 4, characterized in that: The circumferential limiting structure includes a limit head, a limit opening and a limit pin. The limit head is located on the lower end of the head and is provided with an insertion opening. The limit opening is provided on both sides of the through opening. The limit pin can enter the limit opening from one side, pass through the insertion opening, and exit from the limit opening on the other side.

8. The ball head tie rod based on the buffer structure according to claim 1, characterized in that: The inner end of the through-hole is provided with an axially extending extended ring edge, and the inner wall of the extended ring edge is provided with threads.

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