A type of internal breathing spring brake chamber piston shaft

Abstract

This utility model provides a piston shaft for an internal breathing spring brake chamber, comprising: an upper housing, a lower housing, and a sealing mechanism; the sealing mechanism includes a first retaining ring and a second retaining ring, with connecting plates fixed to both sides of the first retaining ring, and locking blocks fixed to the front sides of both connecting plates, each locking block having a through hole on its inner side; and connecting brackets fixed to both sides of the second retaining ring, each connecting bracket having a locking hole on its inner side. This utility model provides a piston shaft for an internal breathing spring brake chamber, in which the first and second retaining rings are fitted onto the surfaces of the upper and lower housings, allowing the locking blocks to enter the inner side of the connecting brackets, aligning the through holes with the locking holes, and then inserting connecting bolts into the through holes and locking holes, thereby pre-installing the upper and lower housings. This pre-installation effectively prevents the retaining rings from separating again, thus avoiding the problem of separation between the upper and lower housings.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking devices, and in particular to a piston shaft for an internal breathing spring brake chamber. Background Technology

[0002] The spring brake chamber is the core component of the automotive braking system. Its piston shaft is a key transmission part that realizes the braking and releasing actions, directly affecting the braking response speed and reliability. The core function of the piston shaft is to transmit the force inside the chamber to the brake actuator, thereby realizing the switching of braking actions.

[0003] Publication number CN220185681U discloses an internal breathing spring brake chamber piston. The device features fixed rings connected to both the lower part of the upper housing and the upper part of the lower housing, along with a connecting mechanism. During assembly, the upper and lower housings are pressed together. When the two fixed rings are close together, the first or second retaining ring in the connecting mechanism is directly engaged with the outer surfaces of the two fixed rings to initially secure the upper and lower housings. Releasing the upper and lower housings and directly engaging the connecting mechanism completes the assembly, making assembly more convenient. However, after engagement, the retaining rings may separate to the sides, causing the upper and lower housings to separate again, hindering stable pre-installation of the device.

[0004] Therefore, it is necessary to provide an internal breathing spring brake chamber piston shaft to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a piston shaft for an internal breathing spring brake chamber, which solves the problem that some existing internal breathing spring brake chamber piston shafts are not convenient for stable pre-installation of the device.

[0006] To solve the above-mentioned technical problems, this utility model provides an internal breathing spring brake chamber piston shaft, comprising: an upper housing, a lower housing, and a sealing mechanism;

[0007] The sealing mechanism includes a first retaining ring and a second retaining ring. Connecting plates are fixed on both sides of the first retaining ring, and locking blocks are fixed on the front sides of both connecting plates. Through holes are opened on the inner sides of both locking blocks. Connecting brackets are fixed on both sides of the second retaining ring, and locking holes are opened on the inner sides of both connecting brackets. The two locking blocks and the two connecting brackets are divided into left and right groups, and connecting bolts are provided on the inner sides of both groups.

[0008] Preferably, the upper housing and the lower housing are provided with mounting grooves on opposite sides, and sealing rings are provided on the inner sides of the two mounting grooves. Extrusion protrusions are fixed on the inner sides of the first retaining ring and the second retaining ring.

[0009] Preferably, a leather cup is provided on one side of the upper shell and the lower shell, a connecting seat is provided on the top of the leather cup, and an air chamber push rod is fixed on the top of the connecting seat.

[0010] Preferably, the surface of the air chamber push rod is slidably connected to the inner side of the upper housing, and a first brake spring is provided on the side of the connecting seat opposite to the upper housing.

[0011] Preferably, an energy storage piston is provided on the inner wall of the lower housing, a sealing ring is provided on the side of the energy storage piston opposite to the lower housing, and a second brake spring is provided on the inner side of the energy storage piston.

[0012] Preferably, both the sealing ring and the sealing ring are made of rubber.

[0013] Compared with related technologies, the piston shaft of the internal breathing spring brake chamber provided by this utility model has the following beneficial effects:

[0014] This utility model provides a piston shaft for an internal breathing spring brake chamber. A first retaining ring and a second retaining ring are fitted onto the surfaces of the upper and lower housings, allowing the retaining block to enter the inner side of the connecting bracket, aligning the through hole with the retaining hole. Then, the connecting bolt is inserted into the through hole and the retaining hole, thereby pre-installing the upper and lower housings. This pre-installation effectively prevents the retaining rings from separating again, thus avoiding the problem of the upper and lower housings separating. At the same time, the alignment of the through hole and the retaining hole provides a clear positioning reference for subsequent bolt tightening, reducing situations such as bolt hole misalignment or installation jamming caused by housing offset. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of a piston shaft for an internal breathing spring brake chamber provided by this utility model;

[0016] Figure 2 for Figure 1 The diagram shows a structural schematic of the sectional view of the upper shell.

[0017] Figure 3 for Figure 2 An enlarged structural diagram of region A is shown below;

[0018] Figure 4 for Figure 3 An enlarged structural diagram of region B is shown below;

[0019] Figure 5 A schematic diagram of the structure of the first retaining ring provided by this utility model;

[0020] Figure 6 A schematic diagram of the structure of the second retaining ring provided by this utility model.

[0021] The following are the labeling elements in the diagram: 1. Upper housing; 2. Lower housing; 3. Sealing mechanism; 31. First retaining ring; 32. Second retaining ring; 33. Connecting plate; 34. Locking block; 35. Through hole; 36. Connecting bracket; 37. Snap-fit ​​hole; 38. Connecting bolt; 4. Mounting groove; 5. Sealing ring; 6. Extrusion protrusion; 7. Leather cup; 8. Connecting seat; 9. Air chamber push rod; 10. First brake spring; 11. Energy storage piston; 12. Sealing ring; 13. Second brake spring. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1 to 6 ,in Figure 1 A schematic diagram of a preferred embodiment of a piston shaft for an internal breathing spring brake chamber provided by this utility model; Figure 2 for Figure 1 The diagram shows a structural schematic of the sectional view of the upper shell. Figure 3 for Figure 2 An enlarged structural diagram of region A is shown below; Figure 4 for Figure 3 An enlarged structural diagram of region B is shown below; Figure 5 A schematic diagram of the structure of the first retaining ring provided by this utility model; Figure 6 The present invention provides a schematic diagram of the structure of the second retaining ring, and a piston shaft of an internal breathing spring brake chamber, comprising: an upper housing 1, a lower housing 2 and a sealing mechanism 3;

[0024] The sealing mechanism 3 includes a first retaining ring 31 and a second retaining ring 32. The first retaining ring 31 is fixed with connecting plates 33 on both sides. The front side of the two connecting plates 33 is fixed with a retaining block 34. The inner side of the two retaining blocks 34 is provided with a through hole 35. The second retaining ring 32 is fixed with connecting brackets 36 on both sides. The inner side of the two connecting brackets 36 is provided with a snap-fit ​​hole 37. The two retaining blocks 34 and the two connecting brackets 36 are divided into left and right groups, and the inner side of the two groups is provided with connecting bolts 38.

[0025] After the locking block 34 is aligned with the connecting bracket 36, the through hole 35 and the locking hole 37 will be in a mating state.

[0026] The upper housing 1 and the lower housing 2 are provided with mounting grooves 4 on opposite sides, and sealing rings 5 ​​are provided on the inner side of the two mounting grooves 4. Extrusion protrusions 6 are fixed on the inner side of the first retaining ring 31 and the second retaining ring 32.

[0027] By setting the extrusion protrusion 6, the sealing ring 5 is sealed by the extrusion protrusion 6 after installation, thereby improving the sealing performance of the device.

[0028] A leather cup 7 is provided on one side of the upper shell 1 and the lower shell 2, and a connecting seat 8 is provided on the top of the leather cup 7. An air chamber push rod 9 is fixed on the top of the connecting seat 8.

[0029] The surface of the air chamber push rod 9 is slidably connected to the inner side of the upper housing 1, and a first brake spring 10 is provided on the side of the connecting seat 8 opposite to the upper housing 1.

[0030] The inner wall of the lower housing 2 is provided with an energy storage piston 11, and a sealing ring 12 is provided on the side of the energy storage piston 11 opposite to the lower housing 2. A second brake spring 13 is provided on the inner side of the energy storage piston 11.

[0031] Both the sealing ring 5 and the sealing ring 12 are made of rubber.

[0032] The working principle of the piston shaft of the internal breathing spring brake chamber provided by this utility model is as follows:

[0033] In use, align the upper housing 1 and the lower housing 2 and press them down. Then, put the first retaining ring 31 and the second retaining ring 32 on the surfaces of the upper housing 1 and the lower housing 2, so that the retaining block 34 enters the inner side of the connecting frame 36, align the through hole 35 with the snap-fit ​​hole 37, and then put the connecting bolt 38 into the through hole 35 and the snap-fit ​​hole 37 to pre-install the upper housing 1 and the lower housing 2. After pre-installation, adjustments can be made as needed.

[0034] Before the upper housing 1 and the lower housing 2 are aligned, two sealing rings 5 ​​need to be placed in the mounting groove 4. After the upper housing 1 and the lower housing 2 are aligned and pre-installed using the first retaining ring 31 and the second retaining ring 32, the sealing rings 5 ​​can be squeezed by the setting of the extrusion protrusion 6, so that the upper housing 1 and the lower housing 2 form a sealed state.

[0035] Compared with related technologies, the piston shaft of the internal breathing spring brake chamber provided by this utility model has the following beneficial effects:

[0036] The first retaining ring 31 and the second retaining ring 32 are fitted onto the surfaces of the upper housing 1 and the lower housing 2, so that the retaining block 34 enters the inner side of the connecting bracket 36, aligning the through hole 35 with the snap-fit ​​hole 37. Then, the connecting bolt 38 is inserted into the through hole 35 and the snap-fit ​​hole 37, thereby pre-installing the upper housing 1 and the lower housing 2. After pre-installation, the retaining rings can be effectively separated again, which would cause the upper housing 1 and the lower housing 2 to separate. At the same time, the alignment of the through hole 35 and the snap-fit ​​hole 37 provides a clear positioning reference for subsequent bolt tightening, reducing situations such as bolt hole misalignment or installation jamming caused by housing offset.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An internal breathing spring brake chamber piston shaft characterized in that, include: Upper housing (1), lower housing (2), and sealing mechanism (3); The sealing mechanism (3) includes a first retaining ring (31) and a second retaining ring (32). The first retaining ring (31) has connecting plates (33) fixed on both sides. The front sides of the two connecting plates (33) are fixed with retaining blocks (34). The inner sides of the two retaining blocks (34) are provided with through holes (35). The second retaining ring (32) has connecting brackets (36) fixed on both sides. The inner sides of the two connecting brackets (36) are provided with snap-fit ​​holes (37). The two retaining blocks (34) and the two connecting brackets (36) are divided into left and right groups, and the inner sides of the two groups are provided with connecting bolts (38).

2. The internal breathing spring brake chamber piston shaft of claim 1, wherein, The upper housing (1) and the lower housing (2) are provided with mounting grooves (4) on opposite sides. The inner sides of the two mounting grooves (4) are provided with sealing rings (5). The inner sides of the first retaining ring (31) and the second retaining ring (32) are fixed with extrusion protrusions (6).

3. The piston shaft of the internal breathing spring braking chamber according to claim 1, characterized in that, A leather cup (7) is provided on one side of the upper shell (1) and the lower shell (2), and a connecting seat (8) is provided on the top of the leather cup (7). An air chamber push rod (9) is fixed on the top of the connecting seat (8).

4. The piston shaft of the internal breathing spring brake chamber according to claim 3, characterized in that, The surface of the air chamber push rod (9) is slidably connected to the inner side of the upper housing (1), and a first brake spring (10) is provided on the side of the connecting seat (8) opposite to the upper housing (1).

5. The piston shaft of the internal breathing spring brake chamber according to claim 2, characterized in that, The inner wall of the lower housing (2) is provided with an energy storage piston (11), and a sealing ring (12) is provided on the side of the energy storage piston (11) opposite to the lower housing (2). A second brake spring (13) is provided on the inner side of the energy storage piston (11).

6. The piston shaft of the internal breathing spring brake chamber according to claim 5, characterized in that, Both the sealing ring (5) and the sealing ring (12) are made of rubber.

Images