Commercial vehicle brake chamber rubber diaphragm

Abstract

The application discloses a rubber diaphragm for a commercial vehicle brake chamber, which comprises a diaphragm body, the diaphragm body is provided with a containing groove with an opening facing forward, the containing groove is used for extending into a push rod, the groove bottom of the containing groove is provided with a concave hole, the outer edge of the front end of the concave hole is provided with a convex ring, the inner wall of the convex ring is uniformly provided with two notches, the hole bottom of the concave hole is provided with an inner concave limiting groove, the two notches are located in front of the limiting groove and are communicated with the limiting groove, the rear end of the push rod is provided with a disc, the outer wall of the disc is uniformly provided with two convex blocks, the two notches are used for clamping the corresponding convex blocks, the convex blocks slide into the limiting groove along the notches, the convex blocks are rotationally matched with the limiting groove after sliding into the limiting groove, and elastic devices for pushing the convex blocks forward are arranged in the concave hole.

Description

Technical Field

[0001] This invention relates to a rubber diaphragm for the brake chamber of a commercial vehicle. Background Technology

[0002] Brake chamber diaphragms, also known as air chamber rubber diaphragms, are products with canvas sandwiched in the middle. They are widely used in commercial vehicle braking systems. During operation, compressed air pushes a push rod forward through the rubber diaphragm and transmits the force to the brake pads in the wheel hub, thereby achieving braking and ensuring the reliability of the vehicle during braking. The rubber diaphragm is bowl-shaped and has a forward-opening receiving groove. The rear end of the push rod extends into the receiving groove and contacts the bottom surface of the groove. Compressed air applies a forward thrust to the rear end of the rubber diaphragm. Because there is no reliable limiting structure between the rubber diaphragm and the push rod, the rubber diaphragm is prone to misalignment under high pressure, causing the rubber diaphragm to fail to effectively push the push rod. Summary of the Invention

[0003] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a rubber diaphragm for the brake chamber of a commercial vehicle.

[0004] The technical solution of the present invention is: a rubber diaphragm for a commercial vehicle brake chamber, comprising a diaphragm body, the diaphragm body having a forward-opening receiving groove into which a push rod extends, a recessed hole at the bottom of the receiving groove, a convex ring at the outer edge of the front end of the recessed hole, two notches evenly distributed on the inner wall of the convex ring, a recessed limiting groove at the bottom of the recessed hole, the two notches being located in front of the limiting groove and communicating with the limiting groove, a disc at the rear end of the push rod, two protrusions evenly distributed on the outer wall of the disc, the two notches for the corresponding protrusions to engage, the protrusions sliding into the limiting groove along the notches, and rotating with the limiting groove after sliding into the limiting groove, an elastic device for pushing the protrusions forward is installed in the recessed hole.

[0005] Furthermore, the elastic device includes a circular pressure plate and multiple springs, with the front ends of the springs fixed to the rear ends of the pressure plate, and the front ends of the pressure plate contacting the rear ends of the protrusions.

[0006] Furthermore, the rear edge of the limiting groove has a recessed groove, and the rear end of the spring is fixed in the groove.

[0007] Furthermore, after the protrusion slides into the limiting groove along the notch, the rear end of the protrusion contacts the front end of the pressure plate and presses the pressure plate backward. The spring is compressed. After turning the push rod or the diaphragm body by hand, the protrusion moves to the rear of the convex ring. After releasing the hand, the spring pushes the pressure plate forward, and the pressure plate pushes the protrusion forward, so that the front end face of the protrusion comes into contact with the rear end face of the convex ring.

[0008] The advantages of using the commercial vehicle brake chamber rubber diaphragm provided by this invention are: the diaphragm body can be firmly connected to the push rod, and the rubber diaphragm can effectively push the push rod. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention;

[0010] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0011] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0012] Figure 4 This is a schematic diagram of the internal structure of the concave hole of the present invention;

[0013] Figure 5 This is a schematic diagram of the push rod.

[0014] As shown in the figure: 1—diaphragm body, 11—accommodating groove, 2—push rod, 21—disc, 211—protrusion, 3—recess, 31—protruding ring, 311—notch, 32—limiting groove, 321—slot, 4—pressure plate, 5—spring. Implementation

[0015] To provide a more intuitive and complete understanding of the technical solution of this invention, the following non-limiting features are described in conjunction with the accompanying drawings:

[0016] like Figure 1 — Figure 5 As shown, the rubber diaphragm of the brake chamber of a commercial vehicle includes a diaphragm body 1. The diaphragm body 1 has a forward-facing receiving groove 11 into which a push rod 2 extends. The bottom of the receiving groove 11 has a recessed hole 3. The outer edge of the front end of the recessed hole 3 has a convex ring 31. Two notches 311 are evenly distributed on the inner wall of the convex ring 31. The bottom of the recessed hole 3 has an inwardly recessed limiting groove 32. The two notches 311 are located in front of the limiting groove 32 and communicate with the limiting groove 32. The rear end of the push rod 2 has a disc 21. Two protrusions 211 are evenly distributed on the outer wall of the disc 21. The two notches 311 allow the corresponding protrusions 211 to be engaged. The protrusions 211 slide into the limiting groove 32 along the notches 311. After the protrusions 211 slide into the limiting groove 32, they rotate and cooperate with the limiting groove 32. An elastic device that pushes the protrusions 211 forward is installed in the recessed hole 3.

[0017] like Figure 2 As shown, the elastic device includes a circular pressure plate 4 and multiple springs 5. The front end of each spring 5 is fixed to the rear end of the pressure plate 4, and the front end of the pressure plate 4 contacts the rear end of the protrusion 211. Preferably, there are three springs 5.

[0018] like Figure 2 As shown, the rear end edge of the limiting groove 32 has a recessed groove 321, and the rear end of the spring 5 is fixed in the groove 321. The groove 321 is provided to facilitate the installation of the spring 5.

[0019] During assembly, after the protrusion 211 slides into the limiting groove 32 along the notch 311, the rear end of the protrusion 211 contacts the front end of the pressure plate 4 and presses the pressure plate 4 backward. The spring 5 is compressed. After manually rotating the push rod 2 or the diaphragm body 1, for example, by rotating 90 degrees, the protrusion 211 moves to the rear of the convex ring 31. After releasing the hand, the spring 5 pushes the pressure plate 4 forward, and the pressure plate 4 pushes the protrusion 211 forward, so that the front end of the protrusion 211 comes into contact with the rear end of the convex ring 31. That is to say, the protrusion 211 is stuck between the pressure plate 4 and the convex ring 31, so the disc 21 is fixed relatively firmly, and the connection between the diaphragm body 1 and the push rod 2 is relatively firm.

[0020] The commercial vehicle brake chamber rubber diaphragm provided by the present invention has a diaphragm body 1 that can be firmly connected to a push rod 2, and the rubber diaphragm can effectively push the push rod 2.

[0021] Of course, the above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any simple modifications and equivalent structural changes made based on the contents of the present invention specification and drawings should also be included within the patent protection scope of the present invention.

Claims

1. A rubber diaphragm for a commercial vehicle brake chamber, comprising a diaphragm body having a receiving slot with an opening facing forward, the receiving slot being for a push rod to extend into, characterized in that: The bottom of the receiving groove has a concave hole, and the outer edge of the front end of the concave hole has a convex ring. Two notches are evenly distributed on the inner wall of the convex ring. The bottom of the concave hole has a recessed limiting groove. The two notches are located in front of the limiting groove and communicate with the limiting groove. The rear end of the push rod has a disc. Two protrusions are evenly distributed on the outer wall of the disc. The two notches are for the corresponding protrusions to be engaged. The protrusions slide into the limiting groove along the notches. After the protrusions slide into the limiting groove, they rotate and cooperate with the limiting groove. An elastic device is installed in the concave hole to push the protrusions forward.

2. The commercial vehicle brake chamber rubber diaphragm of claim 1, characterized by: The elastic device includes a circular pressure plate and multiple springs. The front ends of the springs are fixed to the rear ends of the pressure plate, and the front ends of the pressure plate are in contact with the rear ends of the protrusions.

3. The commercial vehicle brake chamber rubber diaphragm of claim 2, characterized by: The rear edge of the limiting groove has a recessed groove, and the rear end of the spring is fixed in the groove.

4. The commercial vehicle brake chamber rubber diaphragm of claim 2, characterized by: After the protrusion slides into the limiting groove along the notch, the rear end of the protrusion contacts the front end of the pressure plate and presses the pressure plate backward. The spring is compressed. After turning the push rod or the diaphragm body by hand, the protrusion moves to the rear of the convex ring. After releasing the hand, the spring pushes the pressure plate forward, and the pressure plate pushes the protrusion forward, so that the front end of the protrusion comes into contact with the rear end of the convex ring.

Images