Parking braking pull rod screw for automobile braking system

Abstract

The invention discloses a parking braking pull rod screw for an automobile braking system, and relates to the field of pull rod screws. An abutting butt joint connecting piece is mounted on the inner side of the lower end of a pull rod screw body in a nested manner; a movable limiting piece is installed on the inner side of the pull rod screw body in a nested mode, the movable limiting piece corresponds to the outer side position of the abutting butt joint connecting piece, and a reset spring is fixedly connected to the outer side of the upper end of the movable limiting piece. According to the parking braking pull rod screw for the automobile braking system, in the process that the movable limiting piece is stressed to transversely move outwards, the rubber limiting friction piece on the outer side of the movable limiting piece makes contact with the inner wall of an installation environment in advance, and therefore flexible adaptive positioning treatment is effectively conducted according to the inward moving state of the pull rod screw body in an abutting mode; the requirements for locking the corresponding positions of brake parts of automobiles with different depth requirements are met, the overall installation stability of the pull rod screw body is further guaranteed, and the state of vertical thread self-locking and transverse movable limiting piece double-abutting supporting is formed.

Description

Technical Field

[0001] The invention relates to the technical field of draw rod screws, in particular to a parking brake draw rod screw used in an automobile brake system. Background Art

[0002] During the assembly of components in the automobile brake system, corresponding tie rod screws need to be adapted for positioning and installation. As positioning components, the quality of tie rod screws determines the installation stability of the brake equipment. For example, the patented split diffuser connection adjustment tie rod screw with publication number CN216158063U includes: a head for connecting with the end of the tie rod and a screw for connecting with the diffuser, the head and the screw are integrally formed, the head is provided with a receiving cavity, a limit block is provided in the receiving cavity, the end of the tie rod extends into the receiving cavity and is rotated to the limit block to be locked. The use of the integrated tie rod screw eliminates the need for welding pins, can lock the tie rod through the limit portion, and can prevent the welding position from falling off due to corrosion in corrosive gas, which is safe, reliable and has high production efficiency. The screw with limiting function of the patent with publication number CN221482358U comprises a cross screw head, a slotted screw head and a threaded rod, the bottom of the cross screw head and the slotted screw head are fixedly connected to a mounting block, the bottom of the mounting block is fixedly connected to a bottom plate, the bottom of the mounting block is slidably equipped with a pull rod, the top of the pull rod is fixedly connected to a pull button, and a clamping head is fixedly sleeved on the outer circumference of the pull rod, and the interior of the mounting block slides and is equipped with a slide plate. Through the arrangement of the pull rod, the pull button and other structures, when it is necessary to replace the cross screw head, the pull button drives the clamping head to be extracted from the insertion block, drives the slide plate to slide upward, drives the top block to push the insertion block out of the interior of the mounting block, thereby separating the cross screw head and the threaded rod, making it convenient to replace the slotted screw head and making the device more applicable. The above technical solution solves the problems of poor applicability and loose installation in the prior art. For example, the patent with publication number CN119222240A discloses a high-strength pull rod screw for brakes, which relates to the automotive field. The lower end of the butt-connection component is fixedly connected to the pull rod screw end body; a built-in preset oil supply channel is provided inside the butt-connection component and the pull rod screw end body, and a second fitting sealing layer is bonded and docked to the upper end of the built-in preset oil supply channel; a vertical guide reserved groove is provided at the lower end of the outer side of the butt-connection component to push the transverse locking support piece to move outward along the interior of the butt-connection component. As the screw is installed, the transverse locking support piece on its outer side is then abutted along the interior of the screw hole for secondary positioning; Most of the above-mentioned existing technologies have improved their overall structure, but the existing parking brake rod screws used in automobile braking systems have certain limitations in the stability of the inner support after being locked and docked during use. When the vehicle is subjected to high-intensity pressure, it is very easy to loosen, and it is prone to corrosion when water enters for a long time. Later replacement will be cumbersome due to rust and disassembly, and there are certain limitations in use. Summary of the Invention

[0003] The purpose of the present invention is to provide a parking brake rod screw for an automobile braking system, so as to solve the problem raised in the above-mentioned background technology that during use, the stability of the inner side support after locking and docking has certain limitations, it is very easy to loosen during the process of high-intensity pressure on the vehicle, and it is easy to be corroded in a certain state if water enters for a long time. The later replacement will be cumbersome due to rust and disassembly, and there are certain limitations on use.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a parking brake rod screw for an automobile braking system, comprising a rod screw body, wherein a resistance docking connector is nested and installed on the inner side of the lower end of the rod screw body; a movable limiter is nested and installed on the inner side of the rod screw body, and the outer positions of the movable limiter and the resistance docking connector correspond to each other, a return spring is fixedly connected to the outer side of the upper end of the movable limiter, and the return spring is docked with the inner side of the lower end of the rod screw body, an auxiliary self-supporting structure is provided between the rod screw body and the resistance docking connector, and the load-bearing and positioning stability of the rod screw body is controlled by the auxiliary self-supporting structure.

[0005] Furthermore, the auxiliary self-supporting structure is provided with a built-in reserved notch, and the built-in reserved notch is opened on the outside of the abutting connecting piece, the outer side of the upper end of the movable limiting piece is fixedly connected with a fixed reserved top block, and the fixed reserved top block passes through the inner side of the pull rod screw body, and the outer side of the fixed reserved top block corresponds to the inner side of the built-in reserved notch.

[0006] Furthermore, a built-in reserved cavity is opened on the inner side of the movable limiting part, and a limiting friction part is nested and installed on the inner side of the built-in reserved cavity, and the limiting friction part corresponds to the lower end position of the pull rod screw body, and the limiting friction part is symmetrically distributed about the center point of the pull rod screw body.

[0007] Furthermore, the abutting connector forms a nested sliding structure along the inner side of the pull rod screw body, and the built-in reserved notch on the outer side of the abutting connector synchronously applies horizontal pressure to the contacting fixed reserved top block, and the fixed reserved top block and the movable limit piece are an integrated structure.

[0008] Furthermore, the movable limit piece forms a transverse sliding structure along the lower end of the pull rod screw body through a reset spring, and the limiting friction piece on the outside of the movable limit piece is nested and moved inward along the inner side of the movable limit piece during the force application process, and the outer side of the movable limit piece is made of rubber material. After the threaded part of the pull rod screw body is installed to the corresponding position of the automobile's brake component, the movable limit piece at its bottom simultaneously performs the transverse support position locking operation, and the stability of the inner support after locking and docking is guaranteed.

[0009] Furthermore, an adaptive supply structure is provided on the inner side of the pull rod screw body, and the installation position of the pull rod screw body is sealed and filled by the adaptive supply structure; the adaptive supply structure is provided with a fitting piston part, and the fitting piston part and the limiting friction part are fixedly connected, and a liquid storage cavity is opened on the inner side of the limiting friction part, and the liquid storage cavity and the fitting piston part are nested and docked.

[0010] Furthermore, a supply channel assembly is connected to the inner side of the liquid storage cavity, and the supply channel assembly passes through the inner side of the movable limiter. At the same time, the supply channel assembly extends along the inner side of the pull rod screw body. A reserved supply through hole is opened at the inner upper end of the pull rod screw body, and the reserved supply through hole is connected to the upper end of the supply channel assembly.

[0011] Furthermore, when the limiting friction member is subjected to force, it cooperates with the fitting piston member to move along the inner side of the liquid storage cavity, and the outer side of the fitting piston member is fitted with the inner side of the liquid storage cavity, and the inner side of the liquid storage cavity is filled with a foaming agent.

[0012] Furthermore, during the process of the inner side of the liquid storage cavity contacting and fitting the piston part to apply pressure, the material inside it is supplied outward along the flexible supply channel assembly, and the outer side of the pull rod screw body is adaptively filled through the reserved supply through hole. The internal foam filling material is supplied outward along the flexible supply channel assembly, and the outer side of the pull rod screw body is adaptively filled through the reserved supply through hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The parking brake rod screw for the automobile braking system is provided with an auxiliary self-supporting structure, which controls the load-bearing and positioning stability of the rod screw body through the auxiliary self-supporting structure. During the installation of the rod screw body and the corresponding position of the automobile's brake component, the inner side of the abutting connector will be pre-stressed and move upward along the inner side of the rod screw body, thereby synchronously applying horizontal pressure to the contacting fixed reserved top block through the built-in reserved notch on the outer side of the abutting connector, so that the movable limiting member is synchronously pushed outward in conjunction with the pressure applied to the fixed reserved top block. Therefore, after the threaded portion of the rod screw body is installed to the corresponding position of the automobile's brake component, the movable limiting member at its bottom synchronously performs the lateral support position locking operation, and the inner side support stability after the locking and docking is guaranteed. During the process of high-intensity pressure on the vehicle, it will not easily become loose, thereby improving the overall installation stability and support strength of the device. Furthermore, when the movable limiter is forced to move laterally outward, the rubber limiter friction member on its outer side will contact the inner wall of the installation environment in advance, thereby effectively and flexibly adapting to the positioning process according to the inward movement state of the pull rod screw body, meeting the corresponding position locking needs of the brake components of automobiles with different depth requirements, thereby ensuring the overall installation stability of the pull rod screw body, forming a state of vertical thread self-locking and double contact support of the lateral movable limiter; Furthermore, an adaptive supply structure is provided, through which the installation position of the pull rod screw body is sealed and filled. During the outward movement of the movable limiting part, the limiting friction part on its outside will cooperate with the fitting piston part to move along the inner side of the liquid storage cavity when subjected to force, so that the inner side of the liquid storage cavity contacts the fitting piston part to apply pressure, and the foaming filling material inside it is supplied outward along the flexible supply channel assembly. The outer side of the pull rod screw body is adaptively filled through the reserved supply through hole, so that excessive corrosion will not occur in long-term society or other extreme situations, and the later replacement avoids the cumbersome disassembly due to rust, thereby improving the operation convenience and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of a half-cut three-dimensional structure of the present invention; Figure 3 A schematic diagram of the three-dimensional structure of the supply through hole reserved for the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the partially enlarged structure; Figure 5 This is a schematic diagram of a half-section three-dimensional structure of a movable limiting member of the present invention; Figure 6This is a schematic diagram of the three-dimensional structure of the position-limiting friction member of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the built-in reserved notch of the present invention; Figure 8 This is a schematic diagram of the partial three-dimensional structure of the pull rod screw body of the present invention; Figure 9 It is a schematic diagram of the half-section three-dimensional structure of the interfering butt connector of the present invention.

[0015] In the figure: 1. Pull rod screw body; 2. Interference docking connector; 3. Built-in reserved notch; 4. Return spring; 5. Movable limiter; 6. Fixed reserved top block; 7. Built-in reserved cavity; 8. Limiting friction member; 9. Fitting piston member; 10. Liquid storage cavity; 11. Supply channel assembly; 12. Reserved supply through hole. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-9 The present invention provides the following technical solutions: a parking brake rod screw for an automobile braking system, comprising a rod screw body 1 with a butt-jointed connector 2 nested inside the lower end; a movable limiter 5 nested inside the inner side of the rod screw body 1, and the movable limiter 5 corresponds to the outer side of the butt-jointed connector 2, a return spring 4 is fixedly connected to the outer side of the upper end of the movable limiter 5, and the return spring 4 is butt-jointed with the inner side of the lower end of the rod screw body 1, an auxiliary self-supporting structure is provided between the rod screw body 1 and the butt-jointed connector 2, and the load-bearing and positioning stability of the rod screw body 1 is controlled by the auxiliary self-supporting structure.

[0018] The auxiliary self-supporting structure is provided with a built-in reserved notch 3, and the built-in reserved notch 3 is opened on the outside of the abutting connecting piece 2, the outer side of the upper end of the movable limiting piece 5 is fixedly connected with a fixed reserved top block 6, and the fixed reserved top block 6 passes through the inner side of the pull rod screw body 1, and the outer side of the fixed reserved top block 6 corresponds to the inner side position of the built-in reserved notch 3, the inner side of the movable limiting piece 5 is provided with a built-in reserved cavity 7, and the inner side of the built-in reserved cavity 7 is nested with a limiting friction piece 8, and the limiting friction piece 8 corresponds to the lower end position of the pull rod screw body 1, and the limiting friction piece 8 is about The center point of the pull rod screw body 1 is symmetrically distributed, and the contacting butt connector 2 forms a nested sliding structure along the inner side of the pull rod screw body 1, and the built-in reserved notch 3 on the outer side of the contacting butt connector 2 synchronously applies horizontal pressure to the fixed reserved top block 6 in contact, and the fixed reserved top block 6 and the movable limiter 5 are an integrated structure. The movable limiter 5 forms a horizontal sliding structure along the lower end of the pull rod screw body 1 through the reset spring 4, and the limiting friction member 8 on the outer side of the movable limiter 5 is nested and moved inward along the inner side of the movable limiter 5 during the force application process, and the outer side of the movable limiter 5 is made of rubber. Structure, during the installation of the pull rod screw body 1 and the corresponding position of the automobile's brake component, the inner abutting connector 2 will be pre-stressed and move upward along the inner side of the pull rod screw body 1, thereby synchronously applying horizontal pressure to the contacting fixed reserved top block 6 through the built-in reserved notch 3 on the outer side of the abutting connector 2, so that it cooperates with the pressure state of the fixed reserved top block 6 to synchronously push the movable limiting member 5 to move outward, so that after the threaded part of the pull rod screw body 1 is installed to the corresponding position of the automobile's brake component, the movable limiting member 5 at its bottom will synchronously perform the lateral support position locking work, and its After locking and docking, the stability of the inner support is guaranteed, and it will not easily become loose during the process of high-intensity pressure on the vehicle. In the process of the movable limiter 5 being forced to move laterally outward, the rubber limit friction member 8 on its outside will be in contact with the inner wall of the installation environment in advance, thereby effectively performing flexible adaptive positioning processing according to the inward movement state of the pull rod screw body 1 in a resistance manner, meeting the corresponding position locking needs of the brake components of the car with different depth requirements, and thus ensuring the overall installation stability of the pull rod screw body 1, forming a vertical thread self-locking and a double resistance support state of the horizontal movable limiter 5.

[0019] Example 2: Based on Example 1, an adaptive supply structure is also disclosed, and its specific structure is as follows: An adaptive supply structure is provided on the inner side of the pull rod screw body 1, and the installation position of the pull rod screw body 1 is sealed and filled by the adaptive supply structure; The adaptive supply structure is provided with a fitting piston part 9, and the fitting piston part 9 is fixedly connected to the limiting friction part 8. A liquid storage cavity 10 is provided on the inner side of the limiting friction part 8, and the liquid storage cavity 10 and the fitting piston part 9 are nested and docked. The inner side of the liquid storage cavity 10 is penetrated and docked with a supply channel assembly 11, and the supply channel assembly 11 passes through the inner side of the movable limiting part 5. At the same time, the supply channel assembly 11 extends along the inner side of the pull rod screw body 1, and a reserved supply through hole 12 is provided at the inner upper end of the pull rod screw body 1, and the reserved supply through hole 12 is connected to the upper end of the supply channel assembly 11. When the limiting friction part 8 is subjected to force, it cooperates with the fitting piston part 9 to move along the inner side of the liquid storage cavity 10, and the outer side of the fitting piston part 9 is fitted with the inner side of the liquid storage cavity 10, and the inner side of the liquid storage cavity 10 The side is filled with foaming agent, and during the process of the inner side of the liquid storage cavity 10 contacting the fitting piston part 9 to apply pressure, the material inside it is supplied outward along the flexible supply channel component 11, and the outer side of the pull rod screw body 1 is adaptively filled through the reserved supply through hole 12. In the process of the movable limiting part 5 moving outward, the limiting friction part 8 on its outer side will cooperate with the fitting piston part 9 to move along the inner side of the liquid storage cavity 10 when it is under force, so that the inner side of the liquid storage cavity 10 contacts the fitting piston part 9 to apply pressure, and the foaming filling material inside it is supplied outward along the flexible supply channel component 11, and the outer side of the pull rod screw body 1 is adaptively filled through the reserved supply through hole 12, so that excessive corrosion will not occur in long-term society or other extreme situations, and later replacement will avoid the cumbersome disassembly due to rust.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A parking brake rod screw for an automobile braking system, comprising a rod screw body (1), wherein an abutting connecting piece (2) is nested and installed inside the lower end of the rod screw body (1); Its characteristics are: A movable limiting member (5) is nested and installed on the inner side of the pull rod screw body (1), and the movable limiting member (5) corresponds to the outer side of the abutting connecting member (2). A reset spring (4) is fixedly connected to the outer side of the upper end of the movable limiting member (5), and the reset spring (4) is butted against the inner side of the lower end of the pull rod screw body (1). An auxiliary self-supporting structure is provided between the pull rod screw body (1) and the abutting connecting member (2), and the load-bearing positioning stability of the pull rod screw body (1) is controlled by the auxiliary self-supporting structure.

2. The parking brake rod screw for an automobile braking system according to claim 1, characterized in that: The auxiliary self-supporting structure is provided with a built-in reserved notch (3), and the built-in reserved notch (3) is opened on the outside of the abutting connecting member (2); the outer side of the upper end of the movable limiting member (5) is fixedly connected to a fixed reserved top block (6), and the fixed reserved top block (6) passes through the inner side of the pull rod screw body (1), and the outer side of the fixed reserved top block (6) corresponds to the inner side of the built-in reserved notch (3).

3. The parking brake rod screw for an automobile braking system according to claim 2, characterized in that: A built-in reserved cavity (7) is provided on the inner side of the movable limit member (5), and a limit friction member (8) is nested and installed on the inner side of the built-in reserved cavity (7), and the limit friction member (8) corresponds to the lower end position of the pull rod screw body (1), and the limit friction member (8) is symmetrically distributed about the center point of the pull rod screw body (1).

4. The parking brake rod screw for an automobile braking system according to claim 3, characterized in that: The abutting connector (2) forms a nested sliding structure along the inner side of the pull rod screw body (1), and the built-in reserved notch (3) on the outer side of the abutting connector (2) synchronously applies horizontal pressure to the contacting fixed reserved top block (6), and the fixed reserved top block (6) and the movable limiter (5) are an integrated structure.

5. The parking brake rod screw for an automobile braking system according to claim 4, characterized in that: The movable limiting member (5) forms a transverse sliding structure along the lower end of the pull rod screw body (1) through the return spring (4), and the limiting friction member (8) on the outer side of the movable limiting member (5) is nested and moved inward along the inner side of the movable limiting member (5) during the force application process, and the outer side of the movable limiting member (5) is made of rubber material.

6. The parking brake rod screw for an automobile braking system according to claim 3, characterized in that: An adaptive supply structure is provided on the inner side of the pull rod screw body (1), and a sealing and filling process is performed on the installation position of the pull rod screw body (1) through the adaptive supply structure; The adaptive supply structure is provided with a fitting piston member (9), and the fitting piston member (9) is fixedly connected to the position-limiting friction member (8). A liquid storage cavity (10) is provided on the inner side of the position-limiting friction member (8), and the liquid storage cavity (10) and the fitting piston member (9) are nested and docked.

7. The parking brake rod screw for an automobile braking system according to claim 6, characterized in that: The inner side of the liquid storage cavity (10) is penetrated and docked with a supply channel assembly (11), and the supply channel assembly (11) is penetrated along the inner side of the movable limit member (5). At the same time, the supply channel assembly (11) extends along the inner side of the pull rod screw body (1). A reserved supply through hole (12) is opened at the inner upper end of the pull rod screw body (1), and the reserved supply through hole (12) and the upper end of the supply channel assembly (11) are connected to each other.

8. The parking brake rod screw for an automobile braking system according to claim 7, characterized in that: The limiting friction member (8) cooperates with the fitting piston member (9) to move along the inner side of the liquid storage cavity (10) when the force is applied, and the outer side of the fitting piston member (9) is fitted with the inner side of the liquid storage cavity (10), and the inner side of the liquid storage cavity (10) is filled with a foaming agent.

9. The parking brake rod screw for an automobile braking system according to claim 8, characterized in that: During the process of the inner side of the liquid storage cavity (10) contacting the fitting piston member (9) and applying pressure, the material inside is supplied outward along the flexible supply channel component (11) and adaptively fills the outer side of the pull rod screw body (1) through the reserved supply through hole (12).

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