Fixing structure for brake return spring pin of brake

Abstract

The utility model provides a brake braking return spring pin fixing structure which comprises a fixing structure body, the fixing structure body comprises a fixing seat, a mounting seat is welded to the side of the fixing seat, a cavity is formed in the mounting seat, a spring is movably mounted in the cavity, an opening is formed in the mounting seat, and the spring is movably mounted in the cavity. And a fixing pin is movably installed in the opening and comprises a fixing column, an annular base is movably installed on the fixing column, a nut is installed on the top of the annular base, and the nut is fixed to one end of the fixing column. When the fixing structure for the brake return spring pin of the brake is used, the supporting block and the limiting block are installed in the limiting groove, the supporting block or the limiting block pushes the fixing sleeve and the fixing column to move integrally, the initial position of the spring is adjusted through movement, and the tension of the spring is increased after the elastic force of the spring is reduced.

Description

Technical Field

[0001] The utility model relates to the field of spring fixing equipment, in particular to a brake return spring pin fixing structure of a brake. Background Art

[0002] In pneumatic drum brakes, the spring pin is usually fixed in the pin hole by interference fit. When the brake is released, the brake shoe is separated from the brake drum by the return spring pin fixing structure. Otherwise, dragging of the brake will occur, causing the brake drum to overheat, which will lead to a tire blowout or vehicle spontaneous combustion. Therefore, the reliability of the fixation of the return spring pin fixing structure is related to the safety of the entire vehicle, so the spring needs to be effectively fixed.

[0003] According to a drum brake return spring pin fixing structure disclosed in the existing patent document with publication number CN205780459U, it includes a brake shoe and a return spring pin fixing structure, the brake shoe is connected to the return spring pin fixing structure through a spring pin, and the inner side of the circumference of the brake shoe is fixedly connected with a first web and a second web arranged in parallel, a first spring pin mounting hole is opened on the first web near the top of the brake shoe, and a second spring pin mounting hole is opened on the second web near the top of the brake shoe, and the first spring pin mounting hole and the second spring pin mounting hole are coaxially arranged. When this technical solution is in use, the spring pin is fixed to the first web and the second web, and the fixing structure of the spring pin is stable and reliable, which effectively improves the safety and reliability of the brake. With respect to the above technical solution, although this solution achieves safety and reliability, it is impossible to adjust the rebound force of the spring after the spring elastic force weakens in the later stage, which is inconvenient during use. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a brake return spring pin fixing structure for a brake to solve the problems raised in the above-mentioned background technology. The utility model has a novel structure. When in use, it is installed inside the limiting groove through a support block and a limit block. The support block or the limit block pushes the fixing sleeve and the fixing column to move as a whole, and moves to adjust the starting position of the spring. When the spring elastic force decreases, the tension of the spring is increased.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a brake return spring pin fixing structure, including a fixing structure body, the fixing structure body including a fixing seat, a mounting seat welded to the side of the fixing seat, a cavity is opened inside the mounting seat, a spring is movably installed inside the cavity, an opening is opened on the mounting seat, a fixing pin is movably installed inside the opening, the fixing pin includes a fixing column, a ring seat is movably installed on the fixing column, a nut is installed on the top of the ring seat, and the nut is fixed to one end of the fixing column.

[0006] Furthermore, the opening is of an elliptical structure, a limiting groove is provided on the inner wall of the opening, a supporting block and a limiting block are respectively welded to both ends of the ring seat, and a nut is rotatably mounted on one end of the fixing column.

[0007] Furthermore, the support block and the limiting block are oppositely distributed, the width of the support block is greater than the width of the limiting block, and the limiting block and the support block cooperate with the limiting groove.

[0008] Furthermore, the diameter of the nut is larger than the diameter of the opening, a fixing sleeve is movably mounted on the fixing column, and the fixing sleeve is mounted inside the mounting seat.

[0009] Furthermore, an annular groove is formed on the fixing sleeve, a limiting ring is installed on the side of the annular groove, and the limiting ring is welded to the fixing sleeve.

[0010] Furthermore, a hook is movably installed inside the annular groove, and one end of the hook is fixedly installed on the spring.

[0011] The beneficial effects of the utility model: the utility model is a brake return spring pin fixing structure, comprising a fixing seat; a mounting seat; a cavity; a spring; an opening; a limiting groove; a nut; a ring seat; a support block; a limiting block; a fixing column; a fixing sleeve; a ring groove; a limiting ring; a nut; and a hook.

[0012] 1. This brake return spring pin fixing structure is installed inside the limiting groove through a support block and a limit block when in use. The support block or the limit block pushes the fixing sleeve and the fixing column to move as a whole, and moves to adjust the starting position of the spring. When the spring elastic force decreases, the spring tension is increased.

[0013] 2. A brake return spring pin fixing structure of the brake, the spring is installed inside the ring groove through a hook limiter, the ring groove wraps and limits the hook to avoid the impact caused by the hook sliding on the fixed sleeve, and the limit ring provides secondary limit for the hook to ensure the stability of the hook and spring during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a brake return spring pin fixing structure of the utility model;

[0015] Figure 2 This is a structural schematic diagram of a fixing column of a brake return spring pin fixing structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the side cross-sectional structure of a mounting seat of a brake return spring pin fixing structure of the utility model;

[0017] Figure 4This is a structural schematic diagram of a spring and a hook of a brake return spring pin fixing structure of the utility model;

[0018] In the figure: 1. fixing seat; 2. mounting seat; 3. cavity; 4. spring; 5. opening; 6. limiting groove; 7. nut; 8. ring seat; 9. supporting block; 10. limiting block; 11. fixing column; 12. fixing sleeve; 13. ring groove; 14. limiting ring; 15. nut; 16. hook. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figures 1 to 4 The utility model provides a technical solution: a brake return spring pin fixing structure, comprising a fixing structure body, the fixing structure body comprising a fixing seat 1, a mounting seat 2 is welded on the side of the fixing seat 1, a cavity 3 is opened inside the mounting seat 2, a spring 4 is movably installed inside the cavity 3, an opening 5 is opened on the mounting seat 2, a fixing pin is movably installed inside the opening 5, the fixing pin comprises a fixing column 11, a ring seat 8 is movably installed on the fixing column 11, a nut 7 is installed on the top of the ring seat 8, the nut 7 is fixed to one end of the fixing column 11, the opening 5 is an elliptical structure, a limiting groove 6 is opened on the inner wall of the opening 5, a supporting block 9 and a limiting block 10 are respectively welded on both ends of the ring seat 8, a nut 15 is rotatably installed on one end of the fixing column 11, the nut 7 and the nut 15 cooperate to limit the ring seat 8 up and down, and the ring seat 8 plays an upper and lower limiting role for the fixing sleeve 12.

[0021] In this embodiment, the support block 9 and the limit block 10 are oppositely distributed, the width of the support block 9 is greater than the width of the limit block 10, the limit block 10 and the support block 9 cooperate with the limit groove 6, the diameter of the nut 7 is greater than the diameter of the opening 5, and a fixing sleeve 12 is movably installed on the fixing column 11, and the fixing sleeve 12 is installed inside the mounting seat 2. An annular groove 13 is opened on the fixing sleeve 12, and a limit ring 14 is installed on the side of the annular groove 13. The limit ring 14 is welded to the fixing sleeve 12, and a hook 16 is movably installed inside the annular groove 13, and one end of the hook 16 is fixedly installed on the spring 4. The annular groove 13 and the hook 16 cooperate to provide a friction limit point for the hook 16 to prevent the hook 16 from shaking on the fixing sleeve 12.

[0022] When the device is in use, the fixing seat 1 and the mounting seat 2 cooperate to form a brake shoe, which provides a fixing point for the spring 4. When in use, the hook 16 at one end of the spring 4 is installed inside the ring groove 13, and the fixing sleeve 12 is installed inside the mounting seat 2. After the fixing sleeve 12 is installed, the ring seat 8 is installed at both ends of the fixing sleeve 12 from the top and the bottom, and then the fixing column 11 passes through the ring seat 8 and the fixing sleeve 12 at the same time, and the fixing sleeve 12 is provided with a limit support point through the fixing column 11. When in use, the nut 7 and the nut 15 realize the extrusion and fixation of the ring seat 8. When the ring seat 8 does not enter the interior of the opening 5, the support point is provided by the support block 9 and the limit block 10, and the fixing sleeve 12 uses the height at which both ends contact the inner wall of the mounting seat 2. When the overall tension of the spring 4 needs to be adjusted, the nut 15 is removed. After removal, the ring seat 8 is rotated 90 degrees, and the rotating support block 9 or the limit block 10 cooperates with the limit groove 6. When the support block 9 or the limit block 10 is installed inside the limit groove 6, the fixing column 11 and the fixing sleeve 12 are pushed to move as a whole. The movement generates a pulling force on the spring 4, and the pulling force restores the resilience of the spring 4. After the ring seat 8 enters the interior of the opening 5, the limit block 10 or the support block 9 that is not in contact with the limit groove 6 contacts the inner wall on the other side of the opening 5, and provides support force for the ring seat 8 after contact, thereby preventing the ring seat 8 from shaking inside the opening 5.

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A brake return spring pin fixing structure, comprising a fixing structure body, characterized in that: The fixing structure body comprises a fixing seat (1), a mounting seat (2) is welded to the side of the fixing seat (1), a cavity (3) is opened inside the mounting seat (2), a spring (4) is movably installed inside the cavity (3), an opening (5) is opened on the mounting seat (2), a fixing pin is movably installed inside the opening (5), the fixing pin comprises a fixing column (11), a ring seat (8) is movably installed on the fixing column (11), a nut (7) is installed on the top of the ring seat (8), and the nut (7) is fixed to one end of the fixing column (11).

2. A brake return spring pin fixing structure according to claim 1, characterized in that: The opening (5) is of an elliptical structure, a limiting groove (6) is provided on the inner wall of the opening (5), a supporting block (9) and a limiting block (10) are respectively welded to the two ends of the ring seat (8), and a nut (15) is rotatably mounted on one end of the fixing column (11).

3. A brake return spring pin fixing structure according to claim 2, characterized in that: The support block (9) and the limiting block (10) are arranged opposite to each other, the width of the support block (9) is greater than the width of the limiting block (10), and the limiting block (10) and the support block (9) are matched with the limiting groove (6).

4. The brake return spring pin fixing structure according to claim 1, characterized in that: The diameter of the nut (7) is greater than the diameter of the opening (5); a fixing sleeve (12) is movably mounted on the fixing column (11); and the fixing sleeve (12) is mounted inside the mounting seat (2).

5. A brake return spring pin fixing structure according to claim 4, characterized in that: The fixing sleeve (12) is provided with an annular groove (13), a limiting ring (14) is installed on the side of the annular groove (13), and the limiting ring (14) is welded to the fixing sleeve (12).

6. A brake return spring pin fixing structure according to claim 5, characterized in that: A hook (16) is movably mounted inside the annular groove (13), and one end of the hook (16) is fixedly mounted on the spring (4).

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