Lubricating type brake chamber

Abstract

The utility model relates to a lubrication type brake chamber which comprises a shell and a push rod, a diaphragm is arranged in the shell, the push rod is arranged in the shell, a pushing face is arranged at the rear end of the push rod and connected to the diaphragm, an oil tank is arranged in the shell, a through hole is formed in the oil tank, and the through hole is communicated with the oil tank. A plurality of balls are arranged in the through holes; the push rod is reasonable in structural design, lubricant in the oil tank is evenly coated on the push rod through the balls in the through hole, the lubricating effect is better, the lubricant on the push rod cannot flow out to cause pollution through the sealing rubber ring, the fixing sleeve and the sliding sleeve, the contact area of the bottom of the push rod and the membrane is increased through the push face, and the service life of the push rod is prolonged. And the pressure on the diaphragm is reduced, and the service life of the diaphragm is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of brake chambers, in particular to a lubricated brake chamber. Background Art

[0002] The housing and cover of the brake chamber are made of steel plates by stamping and are connected together by clamps and bolts to form the whole housing. There is a rubber diaphragm between them, which divides the whole housing into two completely isolated chambers. The chamber between the diaphragm and the cover is connected to a dual-chamber brake valve, and the chamber between the diaphragm and the housing is always communicated with the atmosphere. When in the free state, the diaphragm tightly adheres to the cover plate, and the other side contacts the disc on the push rod. A return spring is installed between the disc and the inner end of the housing. The other end of the push rod is equipped with a connecting fork for connecting the brake adjusting arm. The whole brake chamber is fixed on a special bracket by bolts. When the vehicle releases the brake, the compressed air in the brake chamber is discharged into the atmosphere through the dual-chamber brake valve or the quick release valve. The diaphragm and the push rod return to their original states under the action of the return spring. When the vehicle brakes, air enters the brake chamber from the air inlet. Under the action of air pressure, the diaphragm deforms, pushes the push rod, drives the brake adjusting arm, rotates the brake cam, and presses the brake shoe friction plate against the brake drum to generate braking. Content of the Utility Model

[0003] In order to overcome the deficiencies of the above-mentioned existing problems, the utility model provides a lubricated brake chamber.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a lubricated brake chamber, including a housing and a push rod. A diaphragm is arranged on the rear end wall inside the housing. An air inlet is opened at the rear end of the housing. An extension hole is opened at the front end of the housing. The push rod is arranged inside the housing. The front end of the push rod extends out from the extension hole. A pushing surface is arranged at the rear end of the push rod. The pushing surface is connected to the diaphragm. An oil tank is arranged inside the housing. A through hole is arranged in the oil tank. The push rod passes through the through hole. A plurality of holes are opened on the through hole, and ball bearings are clamped in each of the plurality of holes. Fixed sleeves are fixedly arranged at the front end inside the housing and the rear end inside the through hole. A sliding sleeve is slidably arranged inside the fixed sleeve. The sliding sleeve is fixedly sleeved on the push rod.

[0005] Preferably, a reserved port is arranged on the housing. A fuel filling port is arranged in the reserved port. The fuel filling port is arranged on the oil tank. An oil cap is arranged on the fuel filling port.

[0006] Preferably, a return spring is sleeved on the push rod. The two ends of the return spring are respectively connected to the fixed sleeve and the pushing surface.

[0007] Preferably, a connecting fork is connected to the front end of the push rod.

[0008] Preferably, a sealing rubber ring is arranged at the gap where the fixed sleeve is connected.

[0009] Preferably, the ball bearings are fitted on the push rod.

[0010] The beneficial effects of the present utility model are as follows: the structure of the present utility model is reasonably designed. The arrangement of the ball bearings in the through hole enables the lubricant in the fuel tank to be evenly coated on the push rod, resulting in better lubrication effect. The arrangements of the sealing rubber ring, the fixed sleeve and the sliding sleeve prevent the lubricant on the push rod from flowing out and causing pollution. The arrangement of the pushing surface increases the contact area between the bottom of the push rod and the diaphragm, reduces the pressure on the diaphragm, and prolongs the service life of the diaphragm. Description of the Drawings

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 is a schematic cross-sectional view of the overall structure of the present utility model;

[0013] In the figure, 1, housing; 2, push rod; 3, diaphragm; 4, air inlet; 5, protruding hole; 6, pushing surface; 7, fuel tank; 8, through hole; 9, ball bearing; 10, fixed sleeve; 11, sliding sleeve; 12, fuel filling port; 13, reserved port; 14, oil cap; 15, return spring; 16, connecting fork; 17, sealing rubber ring. Detailed Embodiments

[0014] All the features disclosed in this specification, or all the steps in any method or process disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0015] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless specifically recited, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically recited, each feature is only an example of a series of equivalent or similar features.

[0016] Such as Figure 1As shown in the figure, a lubricated brake chamber includes a housing 1 and a push rod 2. A diaphragm 3 is provided on the rear end wall inside the housing 1. An air inlet 4 is provided at the rear end of the housing 1. An extension hole 5 is provided at the front end of the housing 1. The push rod 2 is arranged inside the housing 1, and the front end of the push rod 2 extends out from the extension hole 5. A pushing surface 6 is provided at the rear end of the push rod 2, and the pushing surface 6 is connected to the diaphragm 3. An oil tank 7 is provided inside the housing 1, and a through hole 8 is provided in the oil tank 7. The push rod 2 passes through the through hole 8. A number of holes are provided in the through hole 8, and balls 9 are clamped in each of the holes. Fixed sleeves 10 are fixedly provided at the front end inside the housing 1 and the rear end inside the through hole 8. A sliding sleeve 11 is slidably arranged inside the fixed sleeve 10, and the sliding sleeve 11 is fixedly sleeved on the push rod 2.

[0017] A reserved port 13 is provided on the housing 1, and a fuel filling port 12 is provided in the reserved port 13. The fuel filling port 12 is arranged on the oil tank 7, and an oil cap 14 is provided on the fuel filling port 12; A return spring 15 is sleeved on the push rod 2, and both ends of the return spring 15 are respectively connected to the fixed sleeve 10 and the pushing surface 6; A connecting fork 16 is connected to the front end of the push rod 2; A sealing rubber ring is provided at the gap where the fixed sleeve 10 is connected; The balls 9 are in contact with the push rod 2.

[0018] During use, when the brake chamber brakes, air enters from the air inlet 4. Under the action of the air, the diaphragm 3 deforms and generates a thrust on the pushing surface 6, so that the push rod 2 moves forward, and at the same time compresses the return spring 15. The push rod 2 moves linearly along the through hole 8. The connecting fork 16 on the push rod 2 drives the adjusting arm to rotate the brake cam, so that the brake shoe friction lining presses against the brake drum to generate braking.

[0019] This design is ingenious. The arrangement of the balls 9 in the through hole 8 makes the lubricant in the oil tank 7 be coated on the push rod 2 more evenly, with better lubrication effect and better use effect of the brake chamber; The arrangement of the sealing rubber ring 17, the fixed sleeve 10 and the sliding sleeve 11 makes the lubricant on the push rod 2 not flow out to cause pollution and avoids the influence of lubricant overflow on other components; The arrangement of the pushing surface 6 increases the contact area between the bottom of the push rod 2 and the diaphragm 3, reduces the pressure on the diaphragm 3, and prolongs the service life of the diaphragm; The fuel filling port 12 is provided with an external thread, and the oil cap 14 is provided with an internal thread corresponding to the external thread, which is convenient for adding lubricant from the outside.

[0020] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature disclosed in this specification or any new combination, as well as any new method or process step disclosed or any new combination.

Claims

1. A lubricating brake air chamber, comprising a housing (1) and a push rod (2), wherein a diaphragm (3) is provided on a rear end wall of the housing (1), an air inlet (4) is provided at the rear end of the housing (1), and an extension hole (5) is provided at the front end of the housing (1), the push rod (2) is arranged in the housing (1), and the front end of the push rod (2) extends out of the extension hole (5), characterized in that: The rear end of the push rod (2) is provided with a push surface (6), the push surface (6) is connected to the diaphragm (3), the housing (1) is provided with an oil tank (7), the oil tank (7) is provided with a through hole (8), the push rod (2) is inserted into the through hole (8), the through hole (8) is provided with a plurality of holes, and balls (9) are clamped in the plurality of holes, a fixed sleeve (10) is fixedly provided at the front end in the housing (1) and the rear end in the through hole (8), a sliding sleeve (11) is slidably provided in the fixed sleeve (10), and the sliding sleeve (11) is fixedly sleeved on the push rod (2).

2. A lubricated brake chamber according to claim 1, characterized in that: The housing (1) is provided with a reserved opening (13), a refueling port (12) is provided in the reserved opening (13), the refueling port (12) is provided on the oil tank (7), and an oil cap (14) is provided on the refueling port (12).

3. A lubricated brake chamber according to claim 1, characterized in that: The push rod (2) is sleeved with a return spring (15), and two ends of the return spring (15) are respectively connected to the fixed sleeve (10) and the pushing surface (6).

4. A lubricated brake chamber according to claim 1, characterized in that: A connecting fork (16) is connected to the front end of the push rod (2).

5. A lubricated brake chamber according to claim 1, characterized in that: A sealing rubber ring is provided at the gap where the fixing sleeve (10) is connected.

6. A lubricated brake chamber according to claim 1, characterized in that: The ball (9) is fitted onto the push rod (2).

Images