Guide pin with exhaust function and brake

Abstract

The utility model provides a guide pin with an exhaust function and a brake, the guide pin comprises a sleeving section, a positioning section and a mounting section which are sequentially connected from bottom to top, an annular positioning part is formed at the position, close to the sleeving section, of the positioning section, and an annular groove is formed at the position, close to the mounting section, of the positioning section; a first exhaust groove is formed in the annular positioning part in the circumferential direction, and the first exhaust groove is formed in the axial direction of the positioning section from the position where the first exhaust groove is connected with the sleeving section to the position below the annular groove and does not communicate with the annular groove. By arranging the first exhaust groove, when the guide pin is installed, air in the guide pin and the installation hole can be exhausted along the first exhaust groove, air resistance is prevented from being formed between the guide pin and the installation hole, and the installation precision of the guide pin can be improved; and meanwhile, the phenomenon that the guide pin rebounds after being installed can be avoided, so that the guide pin is installed quickly and conveniently, and the brake can stably run for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of automobile brakes, and in particular to a guide pin and a brake with an exhaust function. Background Art

[0002] Guide pins play a crucial role in brake design. However, the following issues often arise during the actual assembly process: Because the clearance between the bracket pin hole and the guide pin is very small, typically between 0.05 and 0.13 mm, grease is applied to the contact surface before assembly to reduce friction and wear. This can easily trap air between the guide pins during insertion into the holes, creating air lock and affecting installation accuracy. Once the guide pins are pressed into the holes, the air lock effect and the grease can cause them to partially pop out, increasing assembly complexity and requiring additional time for separate air venting, adding to the installation difficulty and time cost. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a guide pin and a brake with an exhaust function.

[0004] In a first aspect of the present application, a guide pin with an exhaust function is provided, comprising a sleeve section, a positioning section and an installation section connected sequentially from bottom to top; an annular positioning portion is formed on the positioning section at a position close to the sleeve section, and an annular groove is formed at a position close to the installation section; a first exhaust groove is provided on the circumferential surface of the annular positioning portion, and the first exhaust groove is opened along the axial direction of the positioning section from the connection with the sleeve section to the bottom of the annular groove, and is not connected to the annular groove.

[0005] In some embodiments of the present application, from the connection with the sleeve segment to the annular groove, the diameter of the annular positioning portion first gradually increases, then gradually decreases, and then gradually increases.

[0006] In some embodiments of the present application, there are multiple first exhaust grooves, and the multiple first exhaust grooves are evenly spaced along the circumferential surface of the annular positioning portion.

[0007] In some embodiments of the present application, the number of the first exhaust slots is between 3 and 6.

[0008] In some embodiments of the present application, a second exhaust groove extending axially along the sleeve segment is formed on the circumferential surface of the sleeve segment.

[0009] In some embodiments of the present application, there are a plurality of second exhaust grooves, and the plurality of second exhaust grooves are evenly spaced apart along the circumferential surface of the sleeve segment.

[0010] In some embodiments of the present application, the second exhaust groove and the first exhaust groove are not on the same straight line.

[0011] The second aspect of the present application provides a brake, comprising the above-mentioned guide pin with exhaust function and a brake bracket, the brake bracket comprising a guide pin mounting seat, a guide pin mounting hole formed in the guide pin mounting seat; a guide pin dust cover is installed at the guide pin mounting hole; and a guide pin is installed in the guide pin dust cover.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects: the guide pin with exhaust function of the present application includes a sleeve section, a positioning section and an installation section connected in sequence from bottom to top, an annular positioning portion is formed on the positioning section near the sleeve section, and an annular groove is formed near the installation section; a first exhaust groove is circumferentially arranged on the annular positioning portion, and the first exhaust groove is opened along the axial direction of the positioning section from the connection with the sleeve section to the bottom of the annular groove, and is not connected to the annular groove; by setting the first exhaust groove, when installing the guide pin, the gas in the guide pin and the installation hole can be discharged along the first exhaust groove, avoiding the formation of air resistance between the guide pin and the installation hole, and improving the installation accuracy of the guide pin; at the same time, the phenomenon of the guide pin rebounding after installation can be avoided, making the installation of the guide pin quick and convenient, and ensuring the long-term stable operation of the brake.

[0013] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which constitute part of this document, are intended to provide a further understanding of this document. The exemplary embodiments and descriptions herein are intended to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0015] Figure 1 This is a schematic structural diagram of a guide pin with an exhaust function provided by an exemplary embodiment of the present application;

[0016] Figure 2 This is a front view of a guide pin with an exhaust function provided by an exemplary embodiment of the present application;

[0017] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle;

[0018] Figure 4 It is a structural schematic diagram of the brake assembly process provided by an exemplary embodiment of the present application.

[0019] In the picture:

[0020] 10. Guide pin; 20. Brake bracket; 30. Guide pin dust cover;

[0021] 101. Fitting section; 102. Positioning section; 103. Installation section; 104. Annular positioning portion; 105. Annular groove; 106. First exhaust groove; 107. Second exhaust groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other in any way.

[0023] Guide pins play a crucial role in brake design. However, the following issues often arise during the actual assembly process: Because the clearance between the bracket pin hole and the guide pin is very small, typically between 0.05 and 0.13 mm, grease is applied to the contact surface before assembly to reduce friction and wear. This can easily trap air between the guide pins during insertion into the holes, creating air lock and affecting installation accuracy. Once the guide pins are pressed into the holes, the air lock effect and the grease can cause them to partially pop out, increasing assembly complexity and requiring additional time for separate air venting, adding to the installation difficulty and time cost.

[0024] Based on this, an exemplary embodiment of the present application provides a guide pin with an exhaust function, including a sleeve section, a positioning section and an installation section connected in sequence from bottom to top, an annular positioning portion is formed on the positioning section at a position close to the sleeve section, and an annular groove is formed at a position close to the installation section; a first exhaust groove is circumferentially arranged on the annular positioning portion, and the first exhaust groove is opened along the axial direction of the positioning section from the connection with the sleeve section to the bottom of the annular groove, and is not connected to the annular groove; by setting the first exhaust groove, when installing the guide pin, the gas in the guide pin and the installation hole can be discharged along the first exhaust groove, avoiding the formation of air blockage between the guide pin and the installation hole, and can improve the installation accuracy of the guide pin; at the same time, the phenomenon of the guide pin rebounding after installation can be avoided, making the installation of the guide pin quick and convenient, and improving the installation efficiency of the guide pin.

[0025] An exemplary embodiment of the present application provides a guide pin with an exhaust function, such as Figures 1 to 3As shown, the guide pin comprises a fitting section 101, a positioning section 102, and a mounting section 103, connected sequentially from bottom to top. When mated with the brake bracket 20, the fitting section 101 is mounted within the guide pin mounting hole, while the positioning section 102 is used to position the guide pin with the guide pin dust cover 30 to prevent the guide pin from separating from the guide pin dust cover 30. A mounting hole is defined at the top of the mounting section 103. An annular positioning portion 104 is formed on the positioning section 102 near the fitting section 101, and an annular groove 105 is formed near the mounting section 103. Preferably, the diameter of the annular positioning portion 104 gradually increases, then decreases, and then increases again from the point of connection with the fitting section 101 to the annular groove 105, to facilitate installation of the guide pin and to form a tight fit with the guide pin dust cover 30, thereby enhancing the sealing effect of the guide pin. The circumferential surface of the annular positioning portion 104 is provided with a first exhaust groove 106. The first exhaust groove 106 extends along the axial direction of the positioning section 102 from the connection with the sleeve section 101 to the bottom of the annular groove 105, and is not connected to the annular groove 105. Preferably, along the axial direction of the guide pin, the distance between the first exhaust groove 106 and the annular groove 105 is greater than 0.5 mm, so that the annular positioning portion 104 and the guide pin dust cover 30 form a close contact, thereby improving the dustproof effect of the guide pin. Exemplarily, to improve the exhaust effect, multiple first exhaust grooves 106 are provided, and the multiple first exhaust grooves 106 are evenly spaced along the circumferential surface of the annular positioning portion 104. Preferably, the number of the first exhaust grooves 106 is between 3 and 6. At this time, when the guide pin is installed, the first exhaust grooves 106 allow the gas inside the guide pin mounting hole to be quickly discharged, avoiding the formation of air blockage between the guide pin and the mounting hole, and improving the installation accuracy of the guide pin; it can avoid the phenomenon of the guide pin rebounding after installation, making the installation of the guide pin quick and convenient, and improving the installation efficiency of the guide pin; at the same time, setting the first exhaust grooves 106 with a number between 3 and 6 will not affect the structural strength of the guide pin.

[0026] To enhance air venting during guide pin installation, a second air venting groove 107 extending axially along the circumferential surface of the sleeve segment 101 is formed. Preferably, multiple second air venting grooves 107 are evenly spaced along the circumferential surface of the sleeve segment 101. For example, three evenly spaced second air venting grooves 107 are provided on the sleeve segment 101. Furthermore, to ensure the structural strength of the guide pin, the second air venting grooves 107 and the first air venting grooves 106 are not aligned on the same straight line.

[0027] An exemplary embodiment of the present application provides a brake, such as Figure 4As shown, the brake includes a guide pin 10 with an exhaust function and a brake bracket 20. The brake bracket 20 includes a symmetrically arranged guide pin mounting seat, in which a guide pin mounting hole is formed; a guide pin dust cover 30 is installed at the end of the guide pin mounting hole, and the guide pin dust cover 30 can seal the guide pin mounting seat and the guide pin 10 to prevent dust and impurities from entering the guide pin mounting hole; the guide pin 10 is installed in the guide pin dust cover 30. During the installation of the guide pin 10, the first exhaust groove 106 and the second exhaust groove 107 on the guide pin can exhaust the gas in the guide pin mounting hole, preventing the formation of air blockage between the guide pin 10 and the guide pin mounting hole, so as to quickly install the guide pin. Preferably, the end of the guide pin dust cover 30 has an annular protrusion, which can be clamped in the annular groove 105 of the guide pin 10, so that the guide pin 10 and the guide pin dust cover 30 are tightly connected, thereby improving the sealing effect of the guide pin 10.

[0028] The assembly process of the brake of the present application is as follows: the brake bracket 20 is mounted on an automatic grease or oiling device, which is then activated. The device automatically injects a fixed amount of grease or lubricating oil into the guide pin mounting hole of the brake bracket 20 through a metering valve. A small amount of grease or lubricating oil is then applied to the guide pin dust cover 30 and installed in the guide pin mounting hole of the brake bracket 20. The guide pin 10 is passed through the inner hole of the guide pin dust cover 30 and into the guide pin mounting hole. The guide pin 10 is then pressed until the annular protrusion on the guide pin dust cover 30 engages with the annular groove 105 of the guide pin 10. During the pressing process of the guide pin 10, the air in the guide pin mounting hole is mixed and discharged to the outside of the guide pin mounting hole through the first and second exhaust grooves 106 and 107, thereby preventing the guide pin 10 from forming a sealed space between the guide pin 10 and the guide pin mounting hole. This prevents the installed guide pin 10 from rebounding.

[0029] In this application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the article or device comprising the element.

[0030] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0031] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if such changes and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such changes and modifications.

Claims

1. A guide pin with an exhaust function, characterized in that: It includes a sleeve section, a positioning section and an installation section connected in sequence from bottom to top; an annular positioning portion is formed on the positioning section near the sleeve section, and an annular groove is formed near the installation section; a first exhaust groove is provided on the circumferential surface of the annular positioning portion, and the first exhaust groove is opened along the axial direction of the positioning section from the connection with the sleeve section to the bottom of the annular groove, and is not connected to the annular groove.

2. The guide pin with exhaust function according to claim 1, characterized in that: From the connection point with the sleeve section to the annular groove, the diameter of the annular positioning portion first gradually increases, then gradually decreases, and then gradually increases.

3. The guide pin with exhaust function according to claim 1, characterized in that: There are a plurality of the first exhaust grooves, and the plurality of the first exhaust grooves are evenly spaced along the circumferential surface of the annular positioning portion.

4. The guide pin with exhaust function according to claim 3, characterized in that: The number of the first exhaust slots is between 3 and 6.

5. The guide pin with exhaust function according to claim 1, characterized in that: A second exhaust groove is formed on the circumferential surface of the sleeve segment and extends along the axial direction of the sleeve segment.

6. The guide pin with exhaust function according to claim 5, characterized in that: There are a plurality of the second exhaust grooves, and the plurality of the second exhaust grooves are evenly spaced along the circumferential surface of the sleeve segment.

7. The guide pin with exhaust function according to claim 5, characterized in that: The second exhaust groove and the first exhaust groove are not on the same straight line.

8. A brake, characterized in that: It comprises a guide pin with exhaust function and a brake bracket as described in any one of claims 1 to 7, wherein the brake bracket comprises a guide pin mounting seat, a guide pin mounting hole is formed in the guide pin mounting seat; a guide pin dust cover is installed at the guide pin mounting hole; and a guide pin is installed in the guide pin dust cover.

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