Novel normally-closed caliper type brake

Abstract

The utility model discloses a novel normally-closed caliper type brake, which belongs to the field of industrial brakes and comprises a connecting block, driving structures symmetrically and fixedly arranged at the two ends of the connecting block and friction blocks arranged at the ends, close to the connecting block, of the driving structures. The driving structure comprises a cylinder body arranged on the friction block in a sleeving mode, a piston axially moving in the cylinder body and an air inlet hole formed in the cylinder body and used for introducing air to enable the piston to move away from the friction block. The driving structure further comprises a pressing plate fixedly arranged at the end, away from the friction block, in the cylinder body and a brake spring arranged between the pressing plate and the piston and used for driving the piston to move to be close to the friction block. The cylinder body is further provided with a limiting structure used for conducting circumferential limiting on the friction block. Through the design of the limiting structure, the friction block can be kept stable in the braking process, and the braking effect cannot be affected by circumferential rotation. Due to the fact that the friction block cannot be abraded unevenly due to circumferential rotation in the braking process, the service life of the friction block is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of industrial brakes, and in particular to a novel normally closed caliper brake. Background Art

[0002] A brake is a device that has the function of slowing down, stopping or keeping moving parts in a stopped state. It is a mechanical part that stops or slows down moving parts in a machine.

[0003] like Figure 1 and Figure 2 As shown, a traditional brake includes a connecting block 1', a cylinder 3' symmetrically fixed at both ends of the connecting block 1', a friction block 2' positioned within the cylinder 3' near one end of the connecting block 1', a piston 4' for driving the friction block 2' toward a disc, and a spring 5' for driving the friction block 2' away from the disc. The piston 4' is fixedly connected to the friction block 2' by screws. The braking function is achieved by applying a pressure source to move the piston, which in turn drives the friction block to press against the disc. When the pressure source is cut off, the return spring causes the piston and friction block to move away from the disc, and the brake is now in the open state.

[0004] Since the friction block has no anti-rotation structure, the locking screw is easy to loosen. This not only affects the stability and reliability of the brake, but may also cause abnormal noise and vibration during braking, thus affecting the normal operation of the mechanical equipment.

[0005] Therefore, the present application provides a novel normally closed caliper brake to solve the above problems. Utility Model Content

[0006] This application provides a novel normally closed caliper brake designed to address the problems mentioned in the background art, such as the lack of an anti-rotation structure in existing friction blocks, which can easily loosen locking screws. This not only affects the stability and reliability of the brake, but can also cause abnormal noise and vibration during braking, thereby affecting the normal operation of the mechanical equipment.

[0007] To achieve the above-mentioned objectives, the present application provides the following technical solution: a novel normally closed caliper brake, comprising a connecting block, a driving structure symmetrically fixedly arranged at both ends of the connecting block, and a friction block arranged at one end of the driving structure close to the connecting block;

[0008] Unlike conventional normally closed brakes, the drive mechanism comprises a cylinder housing mounted on the friction block, a piston that moves axially within the cylinder to drive the friction block toward the disc, and an air inlet in the cylinder for admitting gas to move the piston away from the friction block. The drive mechanism also includes a pressure plate fixed to the end of the cylinder away from the friction block, and a brake spring disposed between the pressure plate and the piston to drive the piston toward the friction block. The friction block is fixed to the piston via screws. Using the brake spring as the driving element avoids the unstable braking force caused by gas pressure fluctuations in conventional pneumatic brakes. When pressure is applied to the air inlet, the gas pushes the piston to compress the brake spring, driving the friction block axially and releasing the disc. At this point, the brake is in the open state, allowing the disc to rotate freely. When the pressure source is disconnected, the brake spring's elastic force quickly recovers, pushing the piston to move the friction block toward the disc until it is pressed against it. At this point, the brake is in the closed state, achieving its braking function. Because the brake spring's elastic force is stable and controllable, the braking process is smooth and reliable.

[0009] To prevent the friction block from rotating circumferentially, the cylinder body is also equipped with a retaining structure for circumferentially limiting the friction block. This retaining structure comprises several annular notches formed in the cylinder body and protrusions that plug into the notches and are fixedly connected to the friction block. Two protrusions are designed along the outer circumference of the friction block. After installation, they fit into the notches on the cylinder body, preventing the friction block's pressure disc from rotating during operation, ensuring smooth operation and long service life. During installation, the operator places the friction block in the predetermined position on the cylinder body and ensures that the protrusions align with the notches. Then, using appropriate tools or methods (such as hammering or pressing), the protrusions are inserted into the notches to ensure a tight fit. These protrusions thus serve to circumferentially limit the friction block. When the brake is in operation, the pressure disc applies pressure to the friction block, but the tight fit between the protrusions and the notches prevents circumferential rotation, thereby ensuring stable braking and longevity.

[0010] Preferably, to improve the sealing between the piston and the cylinder, first sealing rings are provided at both ends of the piston corresponding to the cylinder to seal the gap between the piston and the cylinder. The air inlet is located between two corresponding first sealing rings on the cylinder. The first sealing rings are made of a highly elastic, wear-resistant material, such as rubber or polyurethane, and fit tightly into the gap between the piston and the cylinder, effectively preventing gas leakage.

[0011] Preferably, in order to facilitate the installation of the pressing plate, the pressing plate is connected to the cylinder body through a hole retaining ring. The use of a hole retaining ring to connect the pressing plate and the cylinder body greatly simplifies the installation process.

[0012] Preferably, to facilitate the connection of the two cylinders, the two cylinders are fixedly connected at both ends of a connecting block by screws. The connecting block is provided with a through hole communicating with the air inlet holes of the cylinders, and a plug is fixedly inserted into the air inlet hole of one of the cylinders. The connecting block is provided with a through hole communicating with the air inlet holes of the cylinders. In this way, when gas enters through the air inlet hole of one cylinder, it can smoothly enter the air inlet hole of the other cylinder through the through hole of the connecting block, thereby achieving synchronous control of the two pistons.

[0013] Preferably, to improve the sealing performance of the connection between the connecting block and the cylinder body, a second sealing ring is provided at each end of the connecting block to seal the gap between the connecting block and the cylinder body. The second sealing ring is made of a highly elastic, wear-resistant, and corrosion-resistant material, such as rubber, polyurethane, or Teflon. These second sealing rings fit tightly into the gap between the connecting block and the cylinder body, effectively preventing gas leakage and the intrusion of external impurities.

[0014] Preferably, to ensure that the brake torque does not decrease as the friction pad wears, the pressure plate is provided with an adjustment structure. This structure includes an adjustment bolt threadedly inserted into the pressure plate, a top plate disposed between the pressure plate and the brake spring and threadedly connected to the adjustment bolt, and an adjustment nut threadedly fitted onto the adjustment bolt, the adjustment nut abutting against the end of the pressure plate distal from the top plate. This design of the adjustment structure facilitates adjustment of the brake spring preload, thereby compensating for braking force loss due to friction pad wear.

[0015] The present invention utilizes a limit structure to ensure that the friction block remains stable during braking, preventing circumferential rotation from affecting the braking effect. As the friction block does not wear unevenly due to circumferential rotation during braking, its service life is extended.

[0016] The present application uses a brake spring as a driving element, avoiding the problem of unstable braking force caused by gas pressure fluctuations in traditional pneumatic brakes. When a pressure source is introduced into the air inlet, the gas pushes the piston to compress the brake spring, driving the friction block to move axially, thereby releasing the disc. At this time, the brake is in the open state, allowing the disc to rotate freely. When the pressure source is disconnected, the elastic force of the brake spring quickly recovers, pushing the piston to drive the friction block toward the disc until it is pressed against the disc. At this time, the brake is in the closed state, realizing the braking function. Because the elastic force of the brake spring is stable and controllable, the braking process is smooth and reliable.

[0017] The present application can conveniently adjust the preload force of the brake spring through the design of the adjustment structure, thereby compensating for the loss of braking force caused by wear of the friction block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a traditional brake;

[0019] Figure 2 for Figure 1 Structural side view of the middle cylinder;

[0020] Figure 3 This is a structural diagram of a new type of normally closed caliper brake;

[0021] Figure 4 for Figure 3 Structural side view of the middle cylinder body.

[0022] In the picture:

[0023] 1. Connecting block; 11. Through hole; 12. Second sealing ring; 2. Friction block; 3. Driving structure; 31. Cylinder body; 32. Piston; 321. First sealing ring; 33. Air inlet; 331. Plug; 34. Pressure plate; 35. Brake spring; 4. Adjusting structure; 41. Adjusting bolt; 42. Top plate; 43. Adjusting nut; 5. Limiting structure; 51. Bayonet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] This embodiment provides a new type of normally closed caliper brake, such as Figure 3-4 As shown, the brake comprises a connecting block 1, a driving structure 3 symmetrically fixedly arranged at both ends of the connecting block 1, and a friction block 2 arranged at one end of the driving structure 3 close to the connecting block 1;

[0026] Unlike conventional normally closed brakes, the drive mechanism 3 comprises a cylinder 31 mounted on the friction block 2, a piston 32 that moves axially within the cylinder 31 to drive the friction block 2 toward the disc, and an air inlet 33 provided in the cylinder 31 for admitting gas to move the piston 32 away from the friction block 2. The drive mechanism 3 also includes a pressure plate 34 fixed within the cylinder 31 at the end away from the friction block 2, and a brake spring 35 positioned between the pressure plate 34 and the piston 32 to drive the piston 32 toward the friction block 2. The friction block 2 is fixedly connected to the piston 32 via screws. Using the brake spring 35 as the driving element avoids the unstable braking force caused by gas pressure fluctuations in conventional pneumatic brakes. When pressure is introduced into the air inlet 33, the gas pushes the piston 32 to compress the brake spring 35, driving the friction block 2 axially and releasing the disc. At this point, the brake is in the open state, allowing the disc to rotate freely. When the pressure source is disconnected, the spring force of brake spring 35 quickly recovers, pushing piston 32 and friction block 2 toward the disc until it presses against it. At this point, the brake is closed, achieving its braking function. Because the spring force of brake spring 35 is stable and controllable, the braking process is smooth and reliable.

[0027] To prevent the friction block 2 from circumferential rotation, the cylinder body 31 is also equipped with a retaining structure 5 for circumferentially limiting the friction block 2. The retaining structure 5 comprises a plurality of annular notches 51 formed on the cylinder body 31 and protrusions that insert into the notches 51 and are fixedly connected to the friction block 2. Two protrusions are designed 180 degrees from the outer circumference of the friction block 2. After installation, they fit into the notches 51 on the cylinder body 31, ensuring that the friction block 2 does not rotate during operation while pressing the disc, ensuring smooth operation and a long service life. The design of the retaining structure 5 ensures that the friction block 2 remains stable during braking, preventing circumferential rotation from affecting the braking effect. Since the friction block 2 does not wear unevenly due to circumferential rotation during braking, its service life is extended. During installation, the operator places the friction block 2 in the predetermined position in the cylinder body 31 and ensures that the protrusions are aligned with the notches 51. Then, using appropriate tools or methods (such as knocking or pressing), the protrusions are inserted into the notches 51 to ensure a tight fit. In this way, the projections serve to circumferentially limit the friction block 2. When the brake is working, the pressing disc applies pressure to the friction block 2, but due to the close fit between the projections and the bayonet 51, the friction block 2 cannot rotate circumferentially, thereby ensuring the stability of the braking effect and the life of the brake.

[0028] Specifically, to improve the seal between the piston 32 and the cylinder 31, first sealing rings 321 are provided at both ends of the piston 32, corresponding to the cylinder 31, to seal the gap between the piston 32 and the cylinder 31. The air inlet 33 is located between the two corresponding first sealing rings 321 on the cylinder 31. The first sealing rings 321 are made of a highly elastic, wear-resistant material, such as rubber or polyurethane, and fit tightly into the gap between the piston 32 and the cylinder 31, effectively preventing gas leakage.

[0029] Specifically, to facilitate installation of the pressure plate 34, the pressure plate 34 is connected to the cylinder body 31 via a retaining ring. Using a retaining ring to connect the pressure plate 34 and cylinder body 31 significantly simplifies the installation process. Workers no longer need to perform tedious bolt tightening or welding operations; they simply place the pressure plate 34 into the cylinder body 31 and install the retaining ring. This not only improves work efficiency but also reduces safety risks during installation.

[0030] Specifically, to facilitate the connection of the two cylinder bodies 31, the two cylinder bodies 31 are fixedly connected to each end of the connecting block 1 via screws. The connecting block 1 is provided with a through hole 11 that communicates with the air inlet holes 33 on the cylinder bodies 31, and a plug 331 is fixedly inserted into the air inlet hole 33 on one of the cylinder bodies 31. Specifically, the connecting block 1 is provided with a through hole 11 that communicates with the air inlet holes 33 on the cylinder bodies 31. In this way, when gas enters through the air inlet hole 33 of one cylinder body 31, it can smoothly pass through the through hole 11 of the connecting block 1 and enter the air inlet hole 33 of the other cylinder body 31, thereby achieving synchronous control of the two pistons 32. The plug 331 is typically made of a corrosion-resistant and wear-resistant material such as rubber, plastic, or metal. Its shape and size match the air inlet hole 33, and it can tightly seal the air inlet hole 33 to prevent gas leakage. When necessary, the plug 331 can be removed to connect to an external gas source pipeline to achieve gas supply and control.

[0031] More specifically, to improve the seal between the connecting block 1 and the cylinder body 31, second sealing rings 12 are provided at both ends of the connecting block 1 to seal the gap between them. These second sealing rings 12 are made of a highly elastic, wear-resistant, and corrosion-resistant material, such as rubber, polyurethane, or Teflon. They fit tightly into the gap between the connecting block 1 and the cylinder body 31, effectively preventing gas leakage and the intrusion of external impurities.

[0032] To ensure that the brake torque does not decrease as the friction pad 2 wears, the pressure plate 34 is equipped with an adjustment structure 4. This structure comprises an adjustment bolt 41 threaded into the pressure plate 34, a top plate 42 threadedly connected to the adjustment bolt 41 between the pressure plate 34 and the brake spring 35, and an adjustment nut 43 threaded onto the adjustment bolt 41. The adjustment nut 43 abuts against the end of the pressure plate 34 facing away from the top plate 42. The design of the adjustment structure 4 allows for convenient adjustment of the preload of the brake spring 35, thereby compensating for the loss of braking force caused by wear of the friction pad 2. When the friction pad 2 wears to a certain thickness due to long-term use, the braking force of the brake weakens, resulting in a decrease in torque. In this case, the operator can tighten the adjustment bolt 41 and the adjustment nut 43 to push the top plate 42 against the brake spring 35. Since the top plate 42 is threadedly connected to the adjustment bolt 41, tightening the adjustment bolt 41 moves the top plate 42 toward the brake spring 35, thereby increasing the preload of the brake spring 35. In this way, even if the friction block 2 is worn, the brake can still maintain sufficient braking force to ensure that the torque does not decrease.

[0033] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A novel normally closed caliper brake, comprising a connecting block (1), a driving structure (3) symmetrically fixedly arranged at both ends of the connecting block (1), and a friction block (2) arranged at one end of the driving structure (3) close to the connecting block (1); Its characteristics are: The driving structure (3) comprises a cylinder (31) mounted on the friction block (2), a piston (32) axially moving in the cylinder (31) for driving the friction block (2) to move closer to the disc, and an air inlet (33) provided in the cylinder (31) for introducing gas to move the piston (32) away from the friction block (2); the driving structure (3) further comprises a pressure plate (34) fixedly arranged in the cylinder (31) at one end away from the friction block (2), and a brake spring (35) arranged between the pressure plate (34) and the piston (32) for driving the piston (32) to move closer to the friction block (2); The cylinder body (31) is also provided with a limiting structure (5) for circumferentially limiting the friction block (2). The limiting structure (5) comprises a plurality of bayonet holes (51) annularly provided on the cylinder body (31) and a protrusion inserted into the bayonet holes (51) and fixedly connected to the friction block (2).

2. The novel normally closed caliper brake according to claim 1 is characterized in that: First sealing rings (321) for sealing the gap between the piston (32) and the cylinder (31) are provided at both ends of the piston (32) corresponding to the cylinder (31), and the air inlet (33) is located between two corresponding first sealing rings (321) on the cylinder (31).

3. The novel normally closed caliper brake according to claim 1 is characterized in that: The pressure plate (34) is connected to the cylinder body (31) through a retaining ring.

4. The novel normally closed caliper brake according to claim 1 is characterized in that: The two cylinder bodies (31) are fixedly connected to the two ends of the connecting block (1) by screws. The connecting block (1) is provided with a through hole (11) communicating with the air inlet hole (33) on the cylinder bodies (31). A plug (331) is fixedly inserted into the air inlet hole (33) on one of the cylinder bodies (31).

5. The novel normally closed caliper brake according to claim 4 is characterized in that: Both ends of the connection block (1) are provided with second sealing rings (12) for sealing the gap between the connection block (1) and the cylinder body (31).

6. The novel normally closed caliper brake according to claim 1 is characterized in that: The pressure plate (34) is provided with an adjustment structure (4) for ensuring that the torque of the brake does not decrease as the friction block (2) wears. The adjustment structure (4) includes an adjustment bolt (41) threadedly inserted into the pressure plate (34), a top plate (42) arranged between the pressure plate (34) and the brake spring (35) and threadedly connected to the adjustment bolt (41), and an adjustment nut (43) threadedly mounted on the adjustment bolt (41), wherein the adjustment nut (43) contacts the end of the pressure plate (34) away from the top plate (42).

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