Double-diaphragm spring brake chamber

Abstract

The utility model provides a double-diaphragm spring brake chamber, which belongs to the field of brake chambers and comprises a shell, a front cavity and a rear cavity are arranged in the shell, a first diaphragm is arranged on the inner wall of the front cavity, a brake spring is fixedly connected to the inner wall of the rear cavity, a second diaphragm is arranged on the brake spring, and the first diaphragm and the second diaphragm are arranged in the shell. A piston and a piston rod are arranged on the second diaphragm, a brake releasing assembly is arranged on the shell, the brake releasing assembly is arranged in the piston, a push rod penetrates through the shell in a sliding mode, a push plate is fixedly connected to the push rod, a brake spring is fixedly connected to the inner wall of the front cavity, one end of the brake spring is fixedly connected to the push plate, and the other end of the brake spring is fixedly connected to the piston rod. The shell is communicated with two air inlet pipes; a fixing assembly; the fixing assembly comprises a fixing cavity formed in the push plate. The inner wall of the front cavity is supported through the fixing rod, the stability of the push rod is improved, and then the braking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake air chambers, in particular to a double-diaphragm spring brake air chamber. Background Art

[0002] The brake air chamber is also called the slave cylinder. Its function is to convert the pressure of compressed air into mechanical force to rotate the brake camshaft to achieve braking action. The double diaphragm spring brake air chamber is composed of two independent diaphragm air chambers, which are respectively used for driving brake and parking brake to provide braking force for the wheels.

[0003] In normal use of the existing dynamic air chamber, air is introduced into the front cavity so that the diaphragm pushes the push rod for braking. During braking, the first diaphragm pushes the push plate for braking, which easily causes uneven force on the push rod, making the push rod unstable. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a double-diaphragm spring brake air chamber.

[0005] The embodiment of the utility model provides a double diaphragm spring brake air chamber, comprising:

[0006] A housing, wherein a front cavity and a rear cavity are provided in the housing, a first diaphragm is provided on the inner wall of the front cavity, a brake spring is fixedly connected to the inner wall of the rear cavity, a second diaphragm is provided on the brake spring, a piston and a piston rod are provided on the second diaphragm, a brake release assembly is provided on the housing, and the brake release assembly is arranged in the piston, a push rod is slidably penetrated on the housing, a push plate is fixedly connected to the push rod, a brake spring is fixedly connected to the inner wall of the front cavity, one end of the brake spring is fixedly connected to the push plate, and two air inlet pipes are connected to the housing;

[0007] The fixing component comprises a fixing cavity arranged on the push plate, a plurality of telescopic springs are fixedly connected to the inner wall of the fixing cavity, two moving blocks are slidably connected in the fixing cavity, the two moving blocks are both wedge-shaped, the plurality of telescopic springs are respectively fixedly connected to the two moving blocks, the two moving blocks are both fixedly connected to a fixing rod, the two fixing rods are both slidably penetrated through the push plate, a fixing port is provided on the inner wall of the fixing cavity away from the push rod, a push block is fixedly connected to the first diaphragm, and the push block and the fixing port are matched.

[0008] Furthermore, the brake release assembly includes a brake release nut arranged on a piston rod, the outer wall of the piston rod is provided with an external thread, a sliding block is slidably connected inside the piston, the sliding block is slidably connected inside the piston, the piston rod thread passes through the sliding block, and a limit assembly is provided on the sliding block.

[0009] Furthermore, the limiting assembly comprises a limiting groove arranged on the inner wall of the piston, the side wall of the sliding block is fixedly connected to the limiting block, and the limiting block is slidably connected in the limiting groove.

[0010] Furthermore, both of the two fixing rods are provided with anti-slip patterns.

[0011] Furthermore, a sealing layer is provided at the air inlets of the two air inlet pipes.

[0012] Furthermore, two fixing bolts are threadedly penetrated on the shell.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. When the vehicle is braked, air is supplied to the front cavity through the air intake pipe, causing the first diaphragm to bulge. The first diaphragm pushes the push plate to move, causing the push rod to move out for braking. At the same time, the push block pushes the moving block, causing the fixed rod to support the inner wall of the front cavity, thereby improving the stability of the push rod and, in turn, improving the braking efficiency. When parking brakes are required, the gas in the rear cavity is extracted through the air intake pipe, causing the push rod to be pushed out to achieve braking.

[0015] 2. When the parking brake is applied, air can generally be ventilated into the rear cavity through the air intake pipe, so that the push rod moves backward to release the brake. When the air in the valve is used up, the user can turn the brake release nut to make the sliding block slide on the piston rod, thereby driving the piston to move backward, thereby resetting the push rod and facilitating the user to release the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural stereoscopic schematic diagram of a double diaphragm spring brake air chamber described in an embodiment of the utility model.

[0017] Figure 2 It is a three-dimensional cross-sectional view of a double diaphragm spring brake air chamber structure described in an embodiment of the utility model.

[0018] Figure 3 It is a three-dimensional cross-sectional view of a double diaphragm spring brake air chamber push plate described in an embodiment of the utility model.

[0019] In the above drawings: 1 housing, 2 front chamber, 3 rear chamber, 4 first diaphragm, 5 brake spring, 6 second diaphragm, 7 piston rod, 8 push rod, 9 push plate, 10 brake spring, 11 fixed chamber, 12 telescopic spring, 13 moving block, 14 fixed rod, 15 push block, 16 brake release nut, 17 fixing bolt. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figure 1-Figure 3 As shown, the embodiment of the utility model proposes a double diaphragm spring brake air chamber, comprising:

[0022] The shell 1 has two fixing bolts 17 threadedly penetrated thereon, which is convenient for users to install the device. A front cavity 2 and a rear cavity 3 are arranged in the shell 1. A first diaphragm 4 is arranged on the inner wall of the front cavity 2. A brake spring 5 is fixedly connected to the inner wall of the rear cavity 3. A second diaphragm 6 is arranged on the brake spring 5. A piston and a piston rod 7 are arranged on the second diaphragm 6. A brake release assembly is arranged on the shell 1. The brake release assembly is arranged in the piston. A push rod 8 is slidably penetrated on the shell 1. A push plate 9 is fixedly connected to the push rod 8. A brake spring 10 is fixedly connected to the inner wall of the front cavity 2. One end of the brake spring 10 is fixedly connected to the push plate 9. Two air inlet pipes are connected to the shell 1. A sealing layer is arranged at the air inlet of the two air inlet pipes, which improves the sealing performance of the device.

[0023] The fixing assembly includes a fixing cavity 11 arranged on the push plate 9, a plurality of telescopic springs 12 are fixedly connected to the inner wall of the fixing cavity 11, two moving blocks 13 are slidably connected in the fixing cavity 11, the two moving blocks 13 are wedge-shaped, a plurality of telescopic springs 12 are respectively fixedly connected to the two moving blocks 13, the two moving blocks 13 are fixedly connected to fixing rods 14, the two fixing rods 14 are slidably penetrated through the push plate 9, the two fixing rods 14 are provided with anti-skid patterns, which improve the stability of the fixing rods 14 in the front cavity 2, a fixing port is provided on the inner wall of the fixing cavity 11 on the side away from the push rod 8, a pushing block 15 is fixedly connected to the first diaphragm 4, and the pushing block 15 and the fixing port are matched;

[0024] The brake release assembly includes a brake release nut 16 arranged on the piston rod 7, the outer wall of the piston rod 7 is provided with an external thread, a sliding block is slidably connected inside the piston, the piston rod 7 thread penetrates the sliding block, a limit assembly is provided on the sliding block, the limit assembly includes a limit groove arranged on the inner wall of the piston, the side wall of the sliding block is fixedly connected to the limit block, the limit block is slidably connected in the limit groove, and the setting of the limit assembly can ensure that the sliding block slides inside the piston.

[0025] The detailed working process of the utility model is as follows:

[0026] The user first installs the device in the designated position. When the driving brake is needed, air is first supplied to the front chamber 2 through the air intake pipe, so that the first diaphragm 4 bulges, and the first diaphragm 4 pushes the push plate 9 to move, so that the push rod 8 moves out to brake. At the same time, the push block 15 located on the first diaphragm 4 pushes the two moving blocks 13 in the fixed chamber 11 to move to both sides, so that the fixed rod 14 supports the inner wall of the front chamber 2, so that the push plate 9 is supported in the front chamber 2, thereby improving the stability of the push rod 8 and then improving the braking efficiency. When the parking brake is needed, the gas in the rear chamber 3 is extracted through the air intake pipe, and the second diaphragm 6 moves forward, so that the push rod 8 is pushed out to achieve braking. After the parking brake is applied, air can generally be ventilated into the rear chamber 3 through the air intake pipe, so that the push rod 8 moves backward to release the brake. When the gas is used up, the user can rotate the brake release nut 16 to rotate the piston rod 7, so that the sliding block slides on the piston rod 7, and then drives the piston to move backward, so as to achieve the reset of the push rod 8, which is convenient for the user to release the brake.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A double diaphragm spring brake chamber, characterized in that: include: A shell (1), wherein a front chamber (2) and a rear chamber (3) are provided in the shell (1), a first diaphragm (4) is provided on the inner wall of the front chamber (2), a brake spring (5) is fixedly connected to the inner wall of the rear chamber (3), a second diaphragm (6) is provided on the brake spring (5), a piston and a piston rod (7) are provided on the second diaphragm (6), a brake release assembly is provided on the shell (1), and the brake release assembly is arranged in the piston, a push rod (8) is slidably passed through the shell (1), a push plate (9) is fixedly connected to the push rod (8), a brake spring (10) is fixedly connected to the inner wall of the front chamber (2), one end of the brake spring (10) is fixedly connected to the push plate (9), and two intake pipes are connected to the shell (1); A fixed component; the fixed component comprises a fixed cavity (11) arranged on a push plate (9), a plurality of telescopic springs (12) are fixedly connected to the inner wall of the fixed cavity (11), two moving blocks (13) are slidably connected in the fixed cavity (11), the two moving blocks (13) are both wedge-shaped, the plurality of telescopic springs (12) are respectively fixedly connected to the two moving blocks (13), the two moving blocks (13) are both fixedly connected to a fixed rod (14), the two fixed rods (14) are slidably penetrated through the push plate (9), a fixed opening is provided on the inner wall of the fixed cavity (11) away from the push rod (8), a push block (15) is fixedly connected to the first diaphragm (4), and the push block (15) and the fixed opening are matched.

2. A double diaphragm spring brake chamber according to claim 1, characterized in that: in: The brake release assembly comprises a brake release nut (16) arranged on a piston rod (7); the outer wall of the piston rod (7) is provided with an external thread; a sliding block is slidably connected inside the piston; the sliding block is slidably connected inside the piston; the thread of the piston rod (7) passes through the sliding block; and a limit assembly is provided on the sliding block.

3. A double diaphragm spring brake chamber according to claim 2, characterized in that: in: The limiting assembly comprises a limiting groove arranged on the inner wall of the piston, the side wall of the sliding block is fixedly connected to the limiting block, and the limiting block is slidably connected in the limiting groove.

4. A double diaphragm spring brake chamber according to claim 1, characterized in that: in: Anti-slip patterns are provided on the two fixing rods (14).

5. A double diaphragm spring brake chamber according to claim 1, characterized in that: in: A sealing layer is provided at the air inlets of the two air inlet pipes.

6. A double diaphragm spring brake chamber according to claim 2, characterized in that: in: Two fixing bolts (17) are threadedly passed through the housing (1).

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