Double-diaphragm disc brake chamber

Abstract

The utility model discloses a double-diaphragm disc type brake chamber which comprises a front cover assembly, a middle body assembly and a cylinder body assembly. A push rod disc assembly is arranged between the front cover assembly and the middle body assembly, a first leather film is arranged between the push rod disc assembly and the middle body assembly, a dustproof sleeve is fixedly arranged on the front cover assembly and arranged on the outer side of the push rod disc assembly in a sleeving mode, and the cylinder body assembly comprises a second leather film, an aluminum release disc, a cylinder body and a release bolt. According to the double-diaphragm disc type brake chamber, due to the fact that the sealing assembly is arranged, hard friction between the tappet rod and the inner hole of the middle body is reduced, the service life of a product is prolonged, meanwhile, the tappet rod and the tappet rod disc are connected in a riveting pressing mode, the assembling technology is simplified, the assembling cost is reduced, and the potential risk that screws are loosened due to the fact that thread glue is not coated is avoided; center positioning of the release disc is increased through the parking cavity leather film, and damage to the release disc and the spring due to the fact that the leather film and the release disc are not positioned in the prior art when the parking cavity works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake chambers, and particularly relates to a double-diaphragm disc brake chamber. Background Art

[0002] The existing double-diaphragm disc brake chambers have the following problems:

[0003] 1. Since the distance between the telescopic part and the groove of the dust cover is large, the sealing effect is poor;

[0004] 2. The front cover needs to be separately made with a clamp or a collar, and the stamping process is rather cumbersome, reducing the working efficiency;

[0005] 3. Two sealing rings are used for sealing between the middle body and the push rod, resulting in large friction. At the same time, the push rod and the push rod disc are connected by screws + sealant, and there is a potential risk of screw loosening due to the lack of thread sealant application;

[0006] 4. When the parking chamber works, the release disc and the spring are damaged due to the lack of positioning between the diaphragm and the release disc.

[0007] Based on the above situation, the utility model provides a double-diaphragm disc brake chamber, which can effectively solve the above problems. Content of the Utility Model

[0008] The purpose of the utility model is to provide a double-diaphragm disc brake chamber. The double-diaphragm disc brake chamber of the utility model is convenient to use. By arranging the telescopic part close to the groove, the waterproof performance at the sealing part of the dust cover is better; by integrally stamping the front cover, the transition part and the connecting part, the complicated stamping process of separately making a clamp or a collar is omitted, and the assembly reliability and the overall sealability are improved; by arranging a sealing component, the hard friction between the push rod and the inner hole of the middle body is reduced, and the service life of the product is increased. At the same time, the push rod and the push rod disc are connected by riveting, which simplifies the assembly process and assembly cost and avoids the potential risk of screw loosening due to the lack of thread sealant application; the diaphragm in the parking chamber adds central positioning to the release disc, reduces the damage to the release disc and the spring caused by the lack of positioning between the previous diaphragm and the release disc during the operation of the parking chamber, and increases the reliability of the product and the smoothness of the output force.

[0009] The utility model is realized by the following technical solutions:

[0010] A double-diaphragm disc brake chamber includes a front cover assembly, a middle body assembly and a cylinder body assembly which are connected in sequence;

[0011] A push rod disc assembly is provided between the front cover assembly and the middle body assembly. A first diaphragm is provided between the push rod disc assembly and the middle body assembly. A dust cover is fixedly provided on the front cover assembly, and the dust cover is sleeved outside the push rod disc assembly. The cylinder block assembly includes a second diaphragm, an aluminum release disc, a cylinder block and a release bolt;

[0012] The middle body assembly includes a middle body. A tappet passes through the middle of the middle body. One end of the tappet is riveted and connected to a first tappet disc, and the other end is riveted and connected to a second tappet disc. The middle body is provided with a groove at the connection between the middle body and the tappet, and a sealing assembly is provided in the groove;

[0013] A connecting groove is provided in a ring shape at the bottom of the cylinder block. The top of the middle body and the bottom of the second diaphragm are combined and embedded in the connecting groove. A positioning block is provided on the second diaphragm. A positioning groove matching the positioning block is provided on the aluminum release disc. The aluminum release disc is provided between the second diaphragm and the cylinder block, and the positioning block is embedded in the positioning groove of the aluminum release disc. The release bolt is slidably connected in the aluminum release disc, and the release bolt penetrates through the cylinder block.

[0014] The purpose of the present utility model is to provide a double diaphragm disc type brake chamber. The double diaphragm disc type brake chamber of the present utility model is convenient to use. By arranging the telescopic part adjacent to the groove, the waterproof performance at the sealing part of the dust cover is better; by integrally stamping the front cover, the transition part and the connecting part, the complicated stamping process of separately manufacturing a clamp or a clamping ring is omitted, and the reliability of assembly and the sealing performance of the assembly are improved; by arranging the sealing assembly, the hard friction between the tappet and the inner hole of the middle body is reduced, the service life of the product is increased. At the same time, the tappet and the tappet disc are connected by a riveting method, which simplifies the assembly process and the assembly cost, and avoids the potential risk of screw loosening caused by not applying thread glue; the parking chamber diaphragm increases the central positioning of the release disc, reduces the damage of the release disc and the spring caused by the lack of positioning between the previous diaphragm and the release disc during the operation of the parking chamber, and increases the reliability of the product and the smoothness of the output force.

[0015] Preferably, the front cover assembly includes a front cover body. A plurality of mounting bolts are provided at the bottom of the front cover body. A through hole is provided at the bottom of the front cover body. The top of the front cover body is bent outward to form a transition part, and a connecting part is fixedly provided on the transition part.

[0016] Preferably, the dust cover includes a base, a telescopic part and a top ring made integrally. One side of the telescopic part is fixedly connected to the base, and the other side is fixedly connected to the top ring. A groove is provided on the side surface of the top ring, and the connection part between the telescopic part and the top ring is adjacent to the groove.

[0017] Preferably, the sealing assembly includes a bushing, a sealing ring, and a bushing buckle arranged in sequence from left to right. A clamping groove is formed on the groove, an elastic plate is provided on the bushing buckle, and a limiting block is provided on the elastic plate, and the limiting block is arranged in the clamping groove.

[0018] Preferably, an inclined surface is provided in the clamping groove.

[0019] Preferably, a receiving groove is provided on the middle body, and the first tappet plate is arranged in the receiving groove.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. By arranging the telescopic part close to the groove, the waterproof performance at the sealing part of the dust cover is better;

[0022] 2. By integrally stamping the front cover, the transition part, and the connecting part, the complicated stamping process of separately manufacturing the clamp or the clamping ring is omitted, and the reliability of assembly and the sealing performance of the assembly are improved;

[0023] 3. By arranging the sealing assembly, the hard friction between the tappet and the inner hole of the middle body is reduced, and the service life of the product is increased;

[0024] 4. The tappet and the tappet plate are connected by riveting, which simplifies the assembly process and assembly cost, and avoids the potential risk of screw loosening caused by not applying thread sealant;

[0025] 5. The parking chamber diaphragm increases the central positioning of the release disc, reduces the damage of the release disc and the spring caused by the lack of positioning of the previous diaphragm and the release disc during the operation of the parking chamber, and increases the reliability of the product and the smoothness of the output force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a schematic structural diagram of the dust cover of the present invention;

[0028] Figure 3 is a schematic structural diagram of the front cover assembly of the present invention;

[0029] Figure 4 is a schematic structural diagram of the middle body assembly and the cylinder block assembly of the present invention;

[0030] Figure 5 is Figure 4 a partial enlarged structural diagram at A in DETAILED DESCRIPTION OF THE INVENTION

[0031] To enable those skilled in the art to better understand the technical solution of the present utility model, the following describes the preferred implementation of the present utility model in combination with specific embodiments. However, it should be understood that the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent; to better illustrate this embodiment, some components in the drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent.

[0032] Embodiment 1:

[0033] As Figures 1 to 5 shown, the present utility model provides a double diaphragm disc type brake chamber, which includes a front cover assembly 100, a middle body assembly 300 and a cylinder block assembly 400 connected in sequence;

[0034] A push rod disc assembly 500 is provided between the front cover assembly 100 and the middle body assembly 300, a first diaphragm 600 is provided between the push rod disc assembly 500 and the middle body assembly 300, a dust cover 200 is fixedly arranged on the front cover assembly 100, and the dust cover 200 is sleeved outside the push rod disc assembly 500. The cylinder block assembly 400 includes a second diaphragm 410, an aluminum release disc 420, a cylinder block 430 and a release bolt 440;

[0035] The middle body assembly 300 includes a middle body 310, a tappet 320 penetrates through the middle of the middle body 310, one end of the tappet 320 is riveted and connected to a first tappet disc 330, the other end is riveted and connected to a second tappet disc 340, and a groove is provided at the connection part of the middle body 310 between the middle body 310 and the tappet 320, and a sealing component is arranged in the groove;

[0036] A connecting groove 431 is annularly arranged at the bottom of the cylinder block 430, the top of the middle body 310 and the bottom of the second diaphragm 410 are combined and embedded in the connecting groove 431, a positioning block 411 is arranged on the second diaphragm 410, a positioning groove matching the positioning block 411 is arranged on the aluminum release disc 420, the aluminum release disc 420 is arranged between the second diaphragm 410 and the cylinder block 430, and the positioning block 411 is embedded in the positioning groove of the aluminum release disc 420. The release bolt 440 is slidably connected in the aluminum release disc 420, and the release bolt 440 penetrates through the cylinder block 430.

[0037] Embodiment 2:

[0038] As Figures 1 to 5 shown, the present utility model provides a double diaphragm disc type brake chamber, which includes a front cover assembly 100, a middle body assembly 300 and a cylinder block assembly 400 connected in sequence;

[0039] A push rod disc assembly 500 is provided between the front cover assembly 100 and the middle body assembly 300. A first diaphragm 600 is provided between the push rod disc assembly 500 and the middle body assembly 300. A dust cover 200 is fixedly provided on the front cover assembly 100, and the dust cover 200 is sleeved outside the push rod disc assembly 500. The cylinder block assembly 400 includes a second diaphragm 410, an aluminum release disc 420, a cylinder block 430, and a release bolt 440;

[0040] The middle body assembly 300 includes a middle body 310. A tappet 320 penetrates through the middle of the middle body 310. One end of the tappet 320 is riveted and connected to a first tappet disc 330, and the other end is riveted and connected to a second tappet disc 340. The middle body 310 is provided with a groove at the connection between the middle body 310 and the tappet 320, and a sealing assembly is provided in the groove;

[0041] A connecting groove 431 is annularly provided at the bottom of the cylinder block 430. The top of the middle body 310 and the bottom of the second diaphragm 410 are combined and embedded in the connecting groove 431. A positioning block 411 is provided on the second diaphragm 410. A positioning groove matching the positioning block 411 is provided on the aluminum release disc 420. The aluminum release disc 420 is provided between the second diaphragm 410 and the cylinder block 430, and the positioning block 411 is embedded in the positioning groove of the aluminum release disc 420. The release bolt 440 is slidably connected in the aluminum release disc 420, and the release bolt 440 penetrates through the cylinder block 430.

[0042] The front cover assembly 100 includes a front cover body 110. A plurality of mounting bolts 120 are provided at the bottom of the front cover body 110. A through hole 130 is provided at the bottom of the front cover body 110. The top of the front cover body 110 is bent outward to form a transition portion 111, and a connecting portion 112 is fixedly provided on the transition portion 111.

[0043] By setting the transition portion 111 and the connecting portion 112 of the front cover to be formed by one-time stamping, the structure of the double diaphragm disc type brake chamber assembly adopts no clamp or clip ring, which saves the complicated stamping process of separately manufacturing the clamp or clip ring, and improves the assembly reliability and the sealing performance of the assembly.

[0044] Further, in another embodiment, the dust cover 200 includes a base 210, a telescopic portion 220, and a top ring 230 which are integrally formed. One side of the telescopic portion 220 is fixedly connected to the base 210, and the other side is fixedly connected to the top ring 230. A groove 231 is provided on the side surface of the top ring 230, and the connection between the telescopic portion 220 and the top ring 230 is close to the groove 231.

[0045] The dust cover 200 adopts an injection process, and the overall strength and appearance of the part are significantly improved. The telescopic portion 220 is arranged close to the groove 231, so that the waterproof performance of the sealing part of the dust cover 200 is better.

[0046] Further, in another embodiment, the sealing assembly includes a bushing 350, a sealing ring 360, and a bushing buckle 370 arranged in sequence from left to right. A clamping groove 380 is formed in the groove. An elastic plate 371 is provided on the bushing buckle 370, and a limiting block 372 is provided on the elastic plate 371. The limiting block 372 is arranged in the clamping groove 380.

[0047] Through the cooperative arrangement of the bushing 350, the sealing ring 360, and the bushing buckle 370, the hard friction between the tappet 320 and the inner hole of the middle body 310 is reduced, and the service life of the product is increased. The bushing buckle 370 can be quickly clamped with the clamping groove 380 to complete the installation.

[0048] Further, in another embodiment, an inclined surface 381 is provided in the clamping groove 380.

[0049] The provision of the inclined surface 381 facilitates the sliding of the limiting block 372 of the bushing buckle 370 into the clamping groove 380.

[0050] Further, in another embodiment, a receiving groove 311 is provided on the middle body 310, and the first tappet disc 330 is arranged in the receiving groove 311.

[0051] According to the description and drawings of the present utility model, those skilled in the art can easily manufacture or use the dual diaphragm disc type brake chamber of the present utility model and can produce the positive effects recorded in the present utility model.

[0052] Unless otherwise specified, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present utility model are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the drawings and according to specific circumstances.

[0053] Unless otherwise clearly defined and limited, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0054] The above are only the preferred embodiments of this utility model, and do not impose any formal limitations on this utility model. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of this utility model all fall within the protection scope of this utility model.

Claims

1. A double diaphragm disc brake chamber, characterized in that: It includes a front cover assembly, a middle body assembly and a cylinder block assembly connected in sequence; A push rod disc assembly is provided between the front cover assembly and the middle body assembly, a first diaphragm is provided between the push rod disc assembly and the middle body assembly, a dust cover is fixedly provided on the front cover assembly, and the dust cover is sleeved outside the push rod disc assembly. The cylinder block assembly includes a second diaphragm, an aluminum release disc, a cylinder block and a release bolt; The middle body assembly includes a middle body. A tappet penetrates through the middle of the middle body. One end of the tappet is riveted and connected to a first tappet disc, and the other end is riveted and connected to a second tappet disc. A groove is provided at the connection between the middle body and the tappet of the middle body, and a sealing assembly is provided in the groove; A connection groove is provided in a ring shape at the bottom of the cylinder block. The top of the middle body and the bottom of the second diaphragm are combined and embedded in the connection groove. A positioning block is provided on the second diaphragm, and a positioning groove matching the positioning block is provided on the aluminum release disc. The aluminum release disc is provided between the second diaphragm and the cylinder block, and the positioning block is embedded in the positioning groove of the aluminum release disc. The release bolt is slidably connected in the aluminum release disc and penetrates through the cylinder block.

2. The double-diaphragm disc brake chamber according to claim 1, wherein: The front cover assembly includes a front cover body. A plurality of mounting bolts are provided on the bottom of the front cover body. A through hole is provided in the bottom of the front cover body. A transition portion is bent outward at the top of the front cover body, and a connecting portion is fixedly provided on the transition portion.

3. The double-diaphragm disc brake chamber according to claim 1, wherein: The dust cover includes a base, a telescopic portion and a top ring made integrally. One side of the telescopic portion is fixedly connected to the base, and the other side is fixedly connected to the top ring. A groove is provided on the side surface of the top ring, and the connection portion between the telescopic portion and the top ring is close to the groove.

4. The double diaphragm disc type brake air chamber according to claim 3, characterized in that: The sealing assembly includes a bushing, a sealing ring and a bushing buckle arranged in sequence from left to right. A clamping groove is provided on the groove. An elastic plate is provided on the bushing buckle, and a limiting block is provided on the elastic plate. The limiting block is arranged in the clamping groove.

5. The dual-diaphragm disc brake chamber according to claim 4, characterized in that: An inclined surface is provided in the clamping groove.

6. The double-diaphragm disc brake chamber according to claim 1, wherein: A receiving groove is provided on the middle body, and the first tappet disc is arranged in the receiving groove.

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