Double-piston brake chamber and brake chamber kit

Abstract

The utility model relates to the technical field of brake air chambers, and provides a double-piston brake air chamber and a brake air chamber suite. The first side of the flange plate and the front cylinder cover define a traveling cavity, the second side of the flange plate and the rear cylinder cover define a parking cavity, a first air inlet and a second air inlet are formed in the periphery of the flange plate, and the first air inlet is connected with a first air inlet inclined pipe to form a first air channel communicating the outside of the brake air chamber with an inner cavity of the traveling cavity. The second air inlet is connected with a second air inlet inclined pipe to form a second air channel communicating the outer portion of the braking air chamber and the inner cavity of the parking cavity. According to the double-piston brake chamber, the overall structure of the double-piston brake chamber can be simplified, miniaturization of products is facilitated, completely symmetrical arrangement can be achieved, the universality of the flange plate is enhanced, and the overall use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake chambers, and specifically to a double-piston brake chamber and a brake chamber kit. Background Art

[0002] A brake chamber is a device that converts air pressure into mechanical output. The air pressure supplied by the supply device acts within a specified area and pushes the piston to transmit the output force. Currently, automotive brake chambers are divided into two chambers: a service brake chamber and a parking brake chamber. The service brake chamber is connected to the foot valve. Under normal operating conditions, there is no air pressure in the service brake chamber. When the pedal is depressed for service braking, the foot valve inputs air pressure into the service brake chamber, pushing the push rod in the service brake chamber to move outward, thereby providing braking force to the vehicle brake and achieving service braking. The parking brake chamber is connected to the hand valve. Under normal operating conditions, the parking brake chamber is filled with air pressure, and the spring in the parking brake chamber is compressed. When the hand valve is pulled for parking braking, the gas in the parking brake chamber is discharged, and the spring that is not affected by air pressure in the parking brake chamber elongates, pushing the push rod in the parking brake chamber to move outward to provide hand valve braking. When a fault occurs in the parking brake, that is, during normal driving, there is no compressed air in the parking brake chamber. At this time, the spring in the parking brake chamber is in an extended state, so the parking brake chamber is in a braking state. To allow the vehicle to drive normally, the release bolt needs to be unscrewed from the piston assembly of the parking brake chamber, thereby compressing the spring in the parking brake chamber and releasing the parking brake.

[0003] However, since it is necessary to form a service brake chamber and a parking brake chamber, and establish a service air circuit and a parking air circuit respectively, the structures of the brake chambers arranged on the left side and the right side are different (especially the connection relationship of the air circuits arranged on the flange is different), resulting in the non-universality of the flange on the left side and the flange on the right side. Each flange requires a set of specific molds, which increases the product testing and verification costs, product type maintenance costs, etc.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present utility model, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] In view of this, the present utility model provides a double-piston brake chamber and a brake chamber kit, aiming to solve the problem of poor universality of the flange in the prior art, which can simplify the overall structure of the double-piston brake chamber, is beneficial to the miniaturization of the product, and can achieve a completely symmetric layout, enhance the universality of the flange, and reduce the overall usage cost.

[0006] According to one aspect of the present utility model, a double-piston brake chamber is provided, including:

[0007] a front cylinder head;

[0008] a rear cylinder head; and

[0009] a flange, a first side of the flange and the front cylinder head enclose to form a driving cavity, a second side of the flange and the rear cylinder head enclose to form a parking cavity, a first air inlet and a second air inlet are arranged on an outer periphery of the flange, the first air inlet is connected to a first air inlet inclined pipe to form a first air passage communicating an outside of a brake chamber and an inner cavity of the driving cavity, and the second air inlet is connected to a second air inlet inclined pipe to form a second air passage communicating the outside of the brake chamber and the inner cavity of the parking cavity.

[0010] Preferably, an outer edge of the first side of the flange protrudes towards the front cylinder head to form a first annular shoulder, and the first annular shoulder and the front cylinder head are hermetically butted to form the driving cavity;

[0011] an outer edge of the second side of the flange protrudes towards the rear cylinder head to form a second annular shoulder, and the second annular shoulder and the rear cylinder head are hermetically butted to form the parking cavity.

[0012] Preferably, an axis of the first air inlet and an axis of the second air inlet are parallel to the same diameter of the flange.

[0013] Preferably, a value range of an included angle between an axis of the first air inlet inclined pipe and a plane where the flange is located is 30° to 80°.

[0014] Preferably, a value range of an included angle between an axis of the second air inlet inclined pipe and a plane where the flange is located is 30° to 80°.

[0015] Preferably, a release bolt, a parking piston and a second spring are arranged in the parking cavity, one end of the release bolt is sleeved in a positioning hole on an end face of the rear cylinder head, the other end is sleeved in a flange hole of the flange, the parking piston is sleeved on the release bolt, the second spring surrounds the release bolt, and the second spring provides a supporting force between the end face of the rear cylinder head and the parking piston.

[0016] Preferably, a piston disc, a push rod and a first spring are arranged in the driving cavity, one end of the push rod is sleeved in a positioning hole on an end face of the front cylinder head, the other end is connected to the piston disc, the first spring surrounds the push rod, and the first spring provides a supporting force between the end face of the front cylinder head and the piston disc.

[0017] Preferably, a support sleeve is arranged in the driving cavity, one end of the support sleeve is connected to the positioning hole on the end face of the front cylinder head, and the other end is connected to one end of the push rod close to the piston disc.

[0018] According to another aspect of the present utility model, there is provided a brake chamber kit, which is installed on a vehicle and adopts the above-mentioned double-piston brake chamber.

[0019] Preferably, the two double-piston brake chambers are respectively arranged at both ends of the axle, and the first air inlet inclined pipe of one of the double-piston brake chambers is blocked, and the second air inlet inclined pipe of the other double-piston brake chamber is blocked.

[0020] The double-piston brake chamber and the brake chamber kit of the present utility model can simplify the overall structure of the double-piston brake chamber, facilitate the miniaturization of the product, and can achieve a completely symmetrical layout, enhance the versatility of the flange, and reduce the overall use cost.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in accordance with the present utility model, and are used together with the specification to explain the principles of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0023] Figure 1 It is a perspective view of the double-piston brake chamber of the present utility model.

[0024] Figure 2 It is a perspective view of the double-piston brake chamber in a disassembled state of the present utility model.

[0025] Figure 3 It is a schematic diagram of the double-piston brake chamber of the present utility model.

[0026] Figure 4 It is Figure 3 a sectional view taken along the line A-A in

[0027] Figure 5 It is Figure 3 a sectional view taken along the line B-B in

[0028] Figure 6 It is Figure 5 a sectional view taken along the line C-C of the flange in

[0029] Figure 7 It is Figure 5 a sectional view taken along the line D-D of the flange in

[0030] Figure 8This is a schematic diagram of the flange of a double-piston brake chamber in the brake chamber kit of the present utility model.

[0031] Figure 9 This is a schematic diagram of the flange of another double-piston brake chamber in the brake chamber kit of the present utility model.

[0032] Reference Signs

[0033] 1 Flange

[0034] 11 First air inlet

[0035] 12 Second air inlet

[0036] 13 Second air inlet inclined pipe

[0037] 14 Second annular shoulder

[0038] 15 First air inlet inclined pipe

[0039] 16 First annular shoulder

[0040] 2 Front cylinder head

[0041] 21 Service brake chamber

[0042] 3 Rear cylinder head

[0043] 31 Parking brake chamber

[0044] 4 Piston disc

[0045] 5 Push rod

[0046] 6 Support sleeve

[0047] 7 First spring

[0048] 8 Release bolt

[0049] 9 Parking piston

[0050] 10 Second spring Detailed Implementation Modes

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repetitive description will be omitted.

[0052] When used in the specific description, terms such as "first", "second" and the like do not indicate any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0053] It should be noted that, without conflict, the embodiments of the present utility model and the features in different embodiments can be combined with each other.

[0054] Figure 1 It is a perspective view of the double-piston brake air chamber of the present utility model. Figure 2 It is a perspective view of the double-piston brake air chamber of the present utility model in a disassembled state. Figure 3 It is a schematic diagram of the double-piston brake air chamber of the present utility model. Figure 4 is Figure 3 The sectional view taken along the A-A direction in Figure 5 is Figure 3 The sectional view taken along the B-B direction in Figure 6 is Figure 5 The sectional view taken along the C-C direction of the flange in Figure 7 is Figure 5 The sectional view taken along the D-D direction of the flange in Figures 1 to 7 As shown, the double-piston brake air chamber of the present utility model includes: a front cylinder head 2, a rear cylinder head 3 and a flange 1. Among them, the first side of the flange 1 and the front cylinder head 2 enclose to form a service chamber 21, and the second side and the rear cylinder head 3 enclose to form a parking chamber 31. The outer periphery of the flange 1 is provided with a first air inlet 11 and a second air inlet 12. The first air inlet 11 is connected to a first air inlet inclined pipe 15 to form a first air passage connecting the outside of the brake air chamber and the inner cavity of the service chamber, and the second air inlet 12 is connected to a second air inlet inclined pipe 13 to form a second air passage connecting the outside of the brake air chamber and the inner cavity of the parking chamber. The double-piston brake air chamber of the present utility model can simplify the overall structure of the double-piston brake air chamber, is beneficial to the miniaturization of the product, and can realize a completely symmetrical arrangement, enhance the versatility of the flange, and reduce the overall use cost.

[0055] In a preferred embodiment, the outer edge of the first side of the flange 1 protrudes forward to the front cylinder head 2 to form a first annular shoulder 16, and the first annular shoulder 16 is in sealed butt joint with the front cylinder head 2 to form a service chamber 21; the outer edge of the second side of the flange 1 protrudes backward to the rear cylinder head 3 to form a second annular shoulder 14, and the second annular shoulder 14 is in sealed butt joint with the rear cylinder head 3 to form a parking chamber 31, but not limited thereto.

[0056] In a preferred embodiment, the axes of the first air inlet 11 and the second air inlet 12 are parallel to the same diameter of the flange 1, but not limited thereto.

[0057] In a preferred embodiment, the angle between the axis of the first air inlet inclined pipe 15 and the plane where the flange 1 is located ranges from 30° to 80°, but not limited thereto.

[0058] In a preferred embodiment, the angle between the axis of the second air inlet inclined pipe 13 and the plane where the flange 1 is located ranges from 30° to 80°, but not limited thereto.

[0059] In a preferred embodiment, a release bolt 8, a parking piston 9 and a second spring 10 are provided in the parking cavity 31. One end of the release bolt 8 is sleeved in the positioning hole on the end face of the rear cylinder head 3, and the other end is sleeved in the flange hole of the flange 1. The parking piston 9 is sleeved on the release bolt 8, and the second spring 10 surrounds the release bolt 8. The second spring 10 provides a supporting force between the end face of the rear cylinder head 3 and the parking piston 9, but not limited thereto.

[0060] In a preferred embodiment, a piston disc 4, a push rod 5 and a first spring 7 are provided in the driving cavity 21. One end of the push rod 5 is sleeved in the positioning hole on the end face of the front cylinder head 2, and the other end is connected to the piston disc 4. The first spring 7 surrounds the push rod 5. The first spring 7 provides a supporting force between the end face of the front cylinder head 2 and the piston disc 4, but not limited thereto.

[0061] In a preferred embodiment, a support sleeve 6 is provided in the driving cavity 21. One end of the support sleeve 6 is connected to the positioning hole on the end face of the front cylinder head 2, and the other end is connected to one end of the push rod 5 close to the piston disc 4 to enhance the airtightness of the driving cavity 21, but not limited thereto.

[0062] In a preferred embodiment, the second air inlet inclined pipe 13 and the first air inlet inclined pipe 15 are each provided with internal threads to cooperate with the sealing ring bolt to block the air inlet inclined pipe and cut off the air path, but not limited thereto.

[0063] The specific implementation manner of the present utility model is as follows:

[0064] Continue to refer to Figures 1 to 7, the double-piston brake chamber of the present utility model includes: a front cylinder head 2, a rear cylinder head 3, a flange 1, a piston disc 4, a push rod 5, a support sleeve 6, a first spring 7, a release bolt 8, a parking piston 9, and a second spring 10. Among them, the first side of the flange 1 and the front cylinder head 2 enclose a service chamber 21, and the second side and the rear cylinder head 3 enclose a parking chamber 31. The outer periphery of the flange 1 is provided with a first air inlet 11 and a second air inlet 12. The first air inlet 11 is connected to a first air inlet inclined pipe 15 to form a first air passage connecting the outside of the brake chamber and the inner cavity of the service chamber, and the second air inlet 12 is connected to a second air inlet inclined pipe 13 to form a second air passage connecting the outside of the brake chamber and the inner cavity of the parking chamber. The outer edge of the first side of the flange 1 protrudes forward to the front cylinder head 2 to form a first annular shoulder 16, and the first annular shoulder 16 is hermetically docked with the front cylinder head 2 to form the service chamber 21; the outer edge of the second side of the flange 1 protrudes backward to the rear cylinder head 3 to form a second annular shoulder 14, and the second annular shoulder 14 is hermetically docked with the rear cylinder head 3 to form the parking chamber 31. The axial direction of the first air inlet 11 and the axial direction of the second air inlet 12 are parallel to the same diameter of the flange 1. The included angle between the axial direction of the first air inlet inclined pipe 15 and the plane where the flange 1 is located is 40°. The included angle between the axial direction of the second air inlet inclined pipe 13 and the plane where the flange 1 is located is 60°. The release bolt 8, the parking piston 9, and the second spring 10 are arranged in the parking chamber 31. One end of the release bolt 8 is sleeved in the positioning hole on the end face of the rear cylinder head 3, and the other end is sleeved in the flange hole of the flange 1. The parking piston 9 is sleeved on the release bolt 8, and the second spring 10 surrounds the release bolt 8. The second spring 10 provides a supporting force between the end face of the rear cylinder head 3 and the parking piston 9. The piston disc 4, the push rod 5, the support sleeve 6, and the first spring 7 are arranged in the service chamber 21. One end of the push rod 5 is sleeved in the positioning hole on the end face of the front cylinder head 2, and the other end is connected to the piston disc 4. The first spring 7 surrounds the push rod 5. The first spring 7 provides a supporting force between the end face of the front cylinder head 2 and the piston disc 4. One end of the support sleeve 6 is connected to the positioning hole on the end face of the front cylinder head 2, and the other end is connected to one end of the push rod 5 close to the piston disc 4 to enhance the airtightness of the service chamber 21. In the present utility model, the two sides of a flange are respectively enclosed with the front cylinder head 2 and the rear cylinder head 3 to form the service chamber 21 and the parking chamber 31, and two independent air paths are arranged on the flange to respectively connect the service chamber 21 and the parking chamber 31. The flange 1 has the structure of forming two cavities by two-way cooperation respectively and being able to connect the service chamber 21 and the parking chamber 31 with two independent air passages. Thus, a completely symmetrical arrangement can be realized, and only one set of molds is needed to manufacture all the flanges required for the left and right sides of the vehicle, greatly reducing the product testing and verification costs, product type maintenance costs, etc.

[0065] Figure 8 It is a schematic diagram of the flange of a double-piston brake chamber in the brake chamber kit of the present utility model. Figure 9This is a schematic diagram of the flange of another double-piston brake chamber in the brake chamber kit of the present utility model. As Figure 8 and 9 shown, a brake chamber kit of the present utility model is installed on a vehicle and uses the above-mentioned double-piston brake chamber. Since in the double-piston brake chamber of the present utility model, the flanges 1 respectively have air passages connecting the service chamber and the parking chamber, therefore, in the brake chamber kit, the flanges 1 can be completely interchangeable, and it is not limited that one must be used on the left side and the other must be used on the right side. Time costs can be saved in the installation and inspection processes.

[0066] In a preferred embodiment, a bolt with a sealing ring is used to seal and screw the first intake inclined pipe 15 and the second intake inclined pipe 13, but it is not limited thereto.

[0067] In a preferred embodiment, the two double-piston brake chambers are respectively arranged at both ends of the axle. The double-piston brake chambers are mirror images of each other (compare Figure 8 and 9 , the orientations of the two flanges 1 are opposite), and the first intake inclined pipe 15 of one double-piston brake chamber is blocked, and the second intake inclined pipe 13 of the other double-piston brake chamber is blocked, thereby forming different service control circuits and parking control circuits, which will not be elaborated here.

[0068] In a preferred embodiment, steel balls are used to block the first intake inclined pipe 15 and the second intake inclined pipe 13, but it is not limited thereto. When using the brake chamber kit of the present utility model, the unused inlets can be closed with steel balls according to the specific connection requirements of the left and right wheel ends, which can solve the problem that the air chamber flanges at the left and right wheel ends cannot be interchangeable, and also greatly reduce the deformation verification cost.

[0069] The double-piston brake chamber and the brake chamber kit of the present utility model can simplify the overall structure of the double-piston brake chamber, facilitate the miniaturization of the product, and can achieve a completely symmetrical arrangement, enhance the interchangeability of the flanges, and reduce the overall use cost.

[0070] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. A double-piston brake chamber, characterized in that: include: a front cylinder head (2); a rear cylinder cover (3); as well as A flange (1), wherein a first side of the flange (1) and the front cylinder head (2) are combined to form a driving chamber (21), and a second side and the rear cylinder head (3) are combined to form a parking chamber (31). A first air inlet (11) and a second air inlet (12) are provided on the outer periphery of the flange (1), wherein the first air inlet (11) is connected to a first air inlet oblique pipe (15) to form a first air passage connecting the outside of a brake air chamber and the inner cavity of the driving chamber, and the second air inlet (12) is connected to a second air inlet oblique pipe (13) to form a second air passage connecting the outside of a brake air chamber and the inner cavity of the parking chamber.

2. The dual-piston brake chamber according to claim 1, characterized in that: The outer edge of the first side of the flange (1) protrudes toward the front cylinder head (2) to form a first annular shoulder (16), and the first annular shoulder (16) is sealed and butted with the front cylinder head (2) to form the driving chamber (21); The outer edge of the second side of the flange (1) protrudes toward the rear cylinder cover (3) to form a second annular shoulder (14), and the second annular shoulder (14) is sealed and butted with the rear cylinder cover (3) to form the parking chamber (31).

3. The dual-piston brake chamber according to claim 1, characterized in that: The axial direction of the first air inlet (11) and the axial direction of the second air inlet (12) are parallel to the same diameter of the flange (1).

4. The dual-piston brake chamber according to claim 1, characterized in that: The value range of the angle between the axial direction of the first air intake inclined pipe (15) and the plane where the flange (1) is located is 30° to 80°.

5. The dual-piston brake chamber according to claim 1, characterized in that: The value range of the angle between the axial direction of the second air intake inclined pipe (13) and the plane where the flange (1) is located is 30° to 80°.

6. The dual-piston brake chamber according to claim 1, characterized in that: A release bolt (8), a parking piston (9) and a second spring (10) are provided in the parking chamber (31); one end of the release bolt (8) is sleeved on a positioning hole on the end face of the rear cylinder cover (3), and the other end is sleeved on a flange hole of the flange plate (1); the parking piston (9) is sleeved on the release bolt (8), and the second spring (10) surrounds the release bolt (8); the second spring (10) provides a supporting force between the end face of the rear cylinder cover (3) and the parking piston (9).

7. The dual-piston brake chamber according to claim 1, characterized in that: A piston disc (4), a push rod (5) and a first spring (7) are provided in the driving chamber (21); one end of the push rod (5) is sleeved in a positioning hole on the end face of the front cylinder cover (2), and the other end is connected to the piston disc (4); the first spring (7) surrounds the push rod (5), and the first spring (7) provides a supporting force between the end face of the front cylinder cover (2) and the piston disc (4).

8. The dual-piston brake chamber according to claim 7, characterized in that: A support sleeve (6) is provided in the driving chamber (21), one end of the support sleeve (6) is connected to a positioning hole on the end surface of the front cylinder cover (2), and the other end is connected to an end of the push rod (5) close to the piston disc (4).

9. A brake chamber kit, installed on a vehicle, characterized in that: Two double-piston brake chambers as claimed in claim 1 are used.

10. The brake chamber kit according to claim 9, characterized in that: The two double-piston brake air chambers are respectively arranged at the two ends of the vehicle axle, and the first air intake oblique pipe (15) of one of the double-piston brake air chambers is blocked, and the second air intake oblique pipe (13) of the other double-piston brake air chamber is blocked.

Images