Double-layer leather cup sealing structure of automobile brake

Abstract

The utility model discloses a double-layer leather cup sealing structure of an automobile brake, relates to the technical field of brake leather cups, and aims to solve the problem that in the prior art, the outer periphery of a leather cup is pulled by a brake rod and is supported by the outer periphery of the leather cup, so that the leather cup is torn and damaged in the folding process of the outer periphery. An annular extension belt is fixed on the top surface of the opening of the leather cup main body, a sealing ring is arranged in the opening of the leather cup main body, one end of the sealing ring is fixed with the top surface of the inner wall of the leather cup main body, the other end of the sealing ring is fixed on the inner circumference of the extension belt, and the longitudinal section of the sealing ring is splayed; through the arrangement of the sealing ring, the tail end of the sealing ring is fixed with the extension belt, so that the cavity is formed between the outer periphery of the sealing ring and the inner periphery of the leather cup main body, and when the edge of the top surface of the leather cup main body is broken and damaged due to extrusion, the sealing ring can be utilized to continue the whole sealing effect of the leather cup.

Description

Technical Field

[0001] The utility model relates to the technical field of brake cups, in particular to a double-layer cup sealing structure of an automobile brake. Background Art

[0002] The rubber cup on the existing automobile brake master cylinder, especially the rubber cup installed on the automobile brake pump, has a disc-shaped bowl body with an edge extending outward. When installed, the extended edge is fixed to the brake assembly through a clamp.

[0003] However, when in use, the brake lever pushes the bottom of the leather cup, and through the material properties of the rubber leather cup, the bottom of the leather cup is pushed to expand and contract in the brake pump, and the extended edge of the leather cup is fixed by the clamp. In the process of the brake lever pushing the bottom of the leather cup, the outer periphery of the leather cup is subjected to the bidirectional action of the push and pull of the brake lever and the outer peripheral support force of the leather cup, resulting in the leather cup being torn and damaged during the folding process of the outer edge.

[0004] Therefore, a double-layer leather cup sealing structure for automobile brakes is needed to solve the problem in the prior art that the outer periphery of the leather cup is subjected to the bidirectional action of the push and pull of the brake rod and the outer peripheral support force of the leather cup, resulting in the leather cup being torn and damaged during the folding process of the outer peripheral edge. Utility Model Content

[0005] In order to solve the above technical problems, a double-layer leather cup sealing structure for automobile brakes is provided, which solves the problem in the prior art that the outer periphery of the leather cup is subjected to the bidirectional action of the push and pull of the brake rod and the outer peripheral support force of the leather cup, resulting in the leather cup being torn and damaged during the folding process of the outer peripheral edge.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a double-layer leather cup sealing structure of an automobile brake, including a leather cup main body, an annular extension band is fixed to the open top surface of the leather cup main body, pump covers are fitted on the upper and lower parts of the extension band, and a brake rod slides through the inner wall of the top of the pump cover. It is characterized in that a sealing ring is arranged in the opening of the leather cup main body, one end of the sealing ring is fixed to the top surface of the inner wall of the leather cup main body, and the other end of the sealing ring is fixed to the inner periphery of the extension band.

[0007] Preferably, a bolt is fixed at the center of the bottom of the brake rod, and the bolt passes through the leather cup body. A nut is threadedly sleeved on the shaft of the bolt located in the leather cup body.

[0008] Preferably, it is characterized in that a sealing ring is provided between the nut and the inner wall of the leather cup body, and the sealing ring is sleeved on the bolt shank.

[0009] Preferably, the sealing ring has an eight-shaped longitudinal section.

[0010] Compared with the prior art, the advantages of the utility model are:

[0011] (1) By setting the sealing ring and fixing the end of the sealing ring with the extension band, a cavity is formed between the outer periphery of the sealing ring and the inner periphery of the leather cup body. When the edge of the top surface of the leather cup body is broken and damaged due to extrusion, the sealing ring can be used to continue the sealing effect of the leather cup as a whole. In this way, the problem that the outer periphery of the leather cup is subjected to the bidirectional action of the push and pull of the brake lever and the outer periphery support force of the leather cup, resulting in the leather cup being torn and damaged during the folding of the outer periphery edge, can be solved.

[0012] (2) The leather cup body can be firmly locked at the bottom of the brake rod by setting the bolts and nuts. When the sealing ring cannot be completely returned to its original position due to the stacking at the damaged edge of the top surface of the leather cup body, the top surface of the leather cup body is pulled by the brake rod to drive the sealing ring to be completely restored to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 This is a structural cross-sectional view of the utility model after the brake pump is assembled;

[0015] Figure 3 For this utility model Figure 2 Enlarged schematic diagram at point A in the middle.

[0016] The numbers in the figure are:

[0017] 1. Leather cup body; 2. Extension belt; 3. Sealing ring; 4. Sealing ring; 5. Bolt; 6. Brake rod; 7. Pump cover; 8. Nut. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] Reference Figure 1 and Figure 2 As shown, a double-layer leather cup sealing structure of an automobile brake includes a leather cup body 1, an annular extension band 2 is fixed to the open top surface of the leather cup body 1, pump covers 7 are fitted on the upper and lower parts of the extension band 2, and a brake rod 6 slides through the inner wall of the top end of the upper pump cover 7.

[0020] Through the arrangement of the leather cup body 1, the extension band 2, the brake rod 6 and the pump cover 7, when installing the leather cup body 1, the extension band 2 can be buckled at the open parts of the two pump covers 7, and then the leather cup body 1 can be fixed in the middle by fastening the two pump covers 7 with a clamp, and the extension band 2 is squeezed by the two pump covers 7 to form a sealed environment inside the pump cover 7. At the same time, the brake rod 6 pushes the top surface of the leather cup body 1, and utilizes the elastic properties of the rubber of the leather cup body 1 itself, thereby transmitting hydraulic pressure and sealing return between the two pump covers 7.

[0021] However, it was found during use that since the extension band 2 supported the top surface of the leather cup body 1 through the outer periphery of the leather cup body 1, while the brake rod 6 pushed the top surface of the leather cup body 1 downward, the thrust of the brake rod 6 on the top surface of the leather cup body 1 and the supporting force of the outer periphery of the leather cup body 1 on the top surface of the leather cup body 1 caused the edge of the top surface of the leather cup body 1 to crack after a period of use, causing the leather cup body 1 to be unable to continue to play a sealing effect between the two pump covers 7.

[0022] To solve the above problems, refer to Figure 1 As shown, it is worth noting that it also includes a sealing ring 3 arranged in the opening of the leather cup body 1, one end of the sealing ring 3 is fixed to the top surface of the inner wall of the leather cup body 1, and the other end of the sealing ring 3 is fixed to the inner periphery of the extension belt 2, and the longitudinal section of the sealing ring 3 is in an eight-shaped shape.

[0023] By setting the sealing ring 3 and fixing the end of the sealing ring 3 with the extension band 2, a cavity is formed between the outer periphery of the sealing ring 3 and the inner periphery of the leather cup body 1. When the edge of the top surface of the leather cup body 1 is broken and damaged due to extrusion, the sealing ring 3 can be used to continue the sealing effect of the leather cup as a whole.

[0024] However, in reality, after the edge of the top surface of the leather cup body 1 is damaged, the damaged part will be stacked up and down, resulting in an imbalance in the plane of the top surface of the leather cup body 1. When the brake rod 6 pushes the top surface of the leather cup body 1 to transmit hydraulic pressure, the staggered stacking of the damaged part of the top surface of the leather cup body 1 will affect the return of the sealing ring 3, thereby affecting the hydraulic effect.

[0025] In view of this, refer to Figure 2 As shown, it is worth noting that a bolt 5 is fixed at the bottom center of the brake rod 6, the bolt 5 penetrates the leather cup body 1, and a nut 8 is provided on the threaded sleeve of the rod body of the bolt 5 located in the leather cup body 1;

[0026] By setting the bolt 5 and the nut 8, the leather cup body 1 can be firmly locked at the bottom of the brake rod 6. When the sealing ring 3 cannot be completely returned to its original position due to the stacking at the damaged edge of the top surface of the leather cup body 1, the top surface of the leather cup body 1 is pulled by the brake rod 6 to drive the sealing ring 3 to be completely reset.

[0027] Furthermore, it is worth mentioning that a sealing ring 4 is provided between the nut 8 and the inner wall of the leather cup body 1 , and the sealing ring 4 is sleeved on the shaft of the bolt 5 .

[0028] By setting the sealing ring 4 and utilizing the extrusion of the nut 8 and the leather cup body 1, the sealing ring 4 is tightly fitted to the inner wall of the leather cup body 1, and utilizing the deformation of the sealing ring 4 when being squeezed, the inner periphery of the sealing ring 4 is tightly fitted to the rod of the bolt 5, thereby preventing leakage from occurring at the place where the leather cup body 1 is penetrated by the bolt 5.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A double-layer leather cup sealing structure for an automobile brake, comprising a leather cup body (1), an annular extension belt (2) fixed to the open top surface of the leather cup body (1), pump covers (7) being fitted on both the upper and lower sides of the extension belt (2), a brake rod (6) slidingly penetrating the inner wall of the top end of the pump cover (7), and characterized in that: A sealing ring (3) is provided in the opening of the leather cup body (1), one end of the sealing ring (3) is fixed to the top surface of the inner wall of the leather cup body (1), and the other end of the sealing ring (3) is fixed to the inner periphery of the extension band (2).

2. The double-layer leather cup sealing structure of an automobile brake according to claim 1, characterized in that: A bolt (5) is fixed at the bottom center of the brake rod (6), and the bolt (5) passes through the leather cup body (1). The bolt (5) is located in the leather cup body (1) and is threadedly sleeved with a nut (8).

3. The double-layer leather cup sealing structure of an automobile brake according to claim 2, characterized in that: A sealing ring (4) is provided between the nut (8) and the inner wall of the leather cup body (1), and the sealing ring (4) is sleeved on the rod of the bolt (5).

4. The double-layer leather cup sealing structure of an automobile brake according to claim 1, characterized in that: The sealing ring (3) has an eight-shaped longitudinal section.

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