Safe pneumatic normally-closed brake

Abstract

The utility model discloses a safe pneumatic normally-closed brake, and belongs to the technical field of industrial brakes. The safe pneumatic normally-closed brake comprises a shaft tube, an upper fluted disc fixedly arranged at the input end of the shaft tube, and an outer fluted disc rotationally connected to the outer side of the upper fluted disc and located at the output end of the shaft tube. The driving fluted disc is arranged between the upper fluted disc and the outer fluted disc and moves in the axial direction of the shaft tube; the pressure source inlet is formed in the side, close to the upper fluted disc, of the driving fluted disc and used for allowing a pressure source to enter, so that the driving fluted disc moves to be meshed with the outer fluted disc; the spring hole is formed in one side, close to the driving fluted disc, of the outer fluted disc. According to the safe pneumatic normally-closed brake, the normally-closed design is achieved through the brake spring, the requirement for long-term combination of working conditions is met, the system stability and reliability are improved, the brake state can be kept in the low-air-pressure or non-air-pressure environment, and the problem that the torque is reduced due to insufficient air pressure is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial brake, in particular to a safety pneumatic normally closed brake. BACKGROUND

[0002] In the field of industrial brake, the traditional tooth clutch as a common transmission device is widely used in various mechanical equipment to realize power transmission and cut-off. Figure 2 As shown in the figure, the traditional tooth clutch includes hollow through shaft pipe 1', flange tooth disc 2', driving tooth disc 3', piston 4', pressure source inlet 5' and separation spring 6' and other groups of components. When combined, when the pressure source is introduced from the pressure source inlet 5', the piston 4' is pushed, the driving tooth disc 3' and the teeth on the end face of the flange tooth disc 2' begin to mesh, realizing the function of combination; when the pressure of the pressure source is cut off, the separation spring 6' pushes the driving tooth disc 3' to move away from the flange tooth disc 2' side along the axial direction, the clutch is disconnected, realizing the function of separation, and the driving end rotates again.

[0003] But the traditional tooth clutch is mostly normally open structure, that is, in the natural state, the clutch is in the disconnected state, when the torque needs to be transmitted, the clutch needs to be combined through external mechanism such as air pressure, hydraulic pressure, etc. This design is particularly inconvenient in the working condition that needs to be combined for a long time. It not only increases the energy consumption to continuously provide external power source to maintain the combined state of the clutch, but also easily affects the normal operation of the equipment due to the instability of the power source. In addition, the traditional tooth clutch has high requirements for the stability of air pressure or hydraulic pressure. Especially in the air pressure driven clutch, when the air pressure is lower than a certain threshold value such as 0.6MPa, the torque transmission capacity of the clutch will decrease significantly, and even cannot work normally, which not only limits the application of the clutch in low air pressure environment, but also increases the risk of equipment failure.

[0004] Therefore, the present application provides a safety pneumatic normally closed brake to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a safety pneumatic normally closed brake, which aims to solve the problems of the normally open structure of the traditional tooth clutch in the background art, such as inconvenience in the working condition that needs to be combined for a long time, high requirements for the stability of air pressure or hydraulic pressure, and decrease of torque transmission capacity in low air pressure.

[0006] In order to achieve the above purpose, the present application provides the following technical scheme: a safety pneumatic normally closed brake, comprising a shaft pipe, an upper tooth disc fixedly arranged at the input end of the shaft pipe, an outer tooth disc rotatably connected to the outer side of the upper tooth disc and located at the output end of the shaft pipe, a driving tooth disc arranged between the upper tooth disc and the outer tooth disc and moving along the axial direction of the shaft pipe, and a pressure source inlet arranged on the side of the driving tooth disc close to the upper tooth disc for the pressure source to enter to make the driving tooth disc move and mesh with the outer tooth disc.

[0007] The safety pneumatic normally closed brake also includes a spring hole on the outer gear plate near the drive gear plate, and a brake spring disposed in the spring hole with both ends fixedly connected to the inner wall of the spring hole and the drive gear plate, respectively, for moving the drive gear plate to mesh with the upper gear plate when no pressure source is supplied. Through the brake spring, when no pressure source is supplied, the brake spring pushes the drive gear plate to move and mesh with the upper gear plate, thus keeping the brake engaged. This normally closed design allows the brake to meet the requirements of long-term engagement, improving the stability and reliability of the system. Simultaneously, the normally closed design allows the brake to maintain its braking state under low or no air pressure conditions, relying on the elasticity of the brake spring, thus avoiding torque reduction due to insufficient air pressure. Furthermore, when brake disengagement is required, a pressure source is supplied through the pressure source inlet, and the drive gear plate overcomes the elasticity of the brake spring and moves away from the upper gear plate, enabling rapid brake disengagement. This design allows the brake to respond quickly when disengagement is needed, improving working efficiency.

[0008] Preferably, to facilitate the connection between the upper gear plate and the shaft tube, the input end of the shaft tube is provided with a threaded hole, and a locking screw adapted to the threaded hole is screwed onto the upper gear plate for disassembly and assembly of the upper gear plate and the shaft tube. The combination design of the threaded hole and the locking screw allows the upper gear plate to be fixed to the shaft tube simply by screwing the locking screw into the threaded hole during installation. When disassembly is required, the locking screw can be easily separated by rotating it in the opposite direction. This design simplifies the installation and disassembly process of the upper gear plate and the shaft tube, improves assembly efficiency, and ensures the stability of the connection, facilitating later maintenance and replacement.

[0009] Preferably, to ensure the connection and use of the outer gear disk and the upper gear disk, a precision bearing is fixedly sleeved on the upper gear disk, which is in contact with the inner wall of the outer gear disk; the precision bearing is fixedly sleeved at a designated position on the upper gear disk, and its outer ring is in close contact with the inner wall of the outer gear disk, allowing relative rotation between the upper gear disk and the outer gear disk, so as to reduce friction and wear, improve transmission efficiency, and at the same time enhance the smoothness of the relative movement between the upper gear disk and the outer gear disk, and extend the service life of the equipment.

[0010] Preferably, to ensure the axial movement of the drive gear, a sealing disc is rotatably mounted on the upper gear, and the sealing disc is fixedly connected to the outer gear by connecting screws. The drive gear is slidably disposed between the outer gear and the sealing disc, and the pressure source inlet is located between the sealing disc and the drive gear. The sealing disc is fixed to the outer gear by connecting screws, providing a stable support reference for the axial movement of the drive gear, avoiding deviation or shaking of the drive gear during movement, ensuring the uniqueness and accuracy of its axial movement, and improving the reliability and working efficiency of the brake. At the same time, the pressure source inlet is located between the sealing disc and the drive gear, allowing pressure to be directly applied to one side of the drive gear, pushing it to overcome the elastic force of the brake spring and achieve separation from the upper gear.

[0011] Preferably, in order to improve bending resistance, a needle roller bearing that contacts the inner wall of the sealing disc is fixedly sleeved on the upper gear plate; the needle roller bearing is fixedly sleeved on the upper gear plate, and its outer ring is in close contact with the inner wall of the sealing disc, providing an additional support point, thereby enhancing the bending resistance of the brake, so that the brake can remain stable and safe and reliable when installed vertically, meeting the needs of industrial production and working environments with high requirements for smooth transmission.

[0012] Preferably, to ensure the sealing performance between the sealing disc and the drive gear disc, a sealing ring is fixedly fitted onto the side of the sealing disc near the outer gear disc and the upper gear disc, and it contacts the inner wall of the drive gear disc. The sealing ring is fixedly fitted onto the side of the sealing disc near the outer gear disc and the upper gear disc, and its outer edge is in close contact with the inner wall of the drive gear disc, which can form an effective sealing barrier, thereby ensuring the sealing performance between the sealing disc and the drive gear disc, preventing pressure source leakage, and improving the working efficiency and safety of the brake.

[0013] This safety pneumatic normally closed brake uses a brake spring. When no pressure source is supplied, the brake spring pushes the drive gear to move and mesh with the upper gear, thus keeping the brake engaged. This normally closed design allows the brake to meet the requirements of long-term engagement, improving the stability and reliability of the system. At the same time, the normally closed design allows the brake to maintain the braking state in low or no air pressure environments by relying on the elasticity of the brake spring, thus avoiding the problem of torque reduction due to insufficient air pressure.

[0014] This safety pneumatic normally closed brake is supplied with pressure through the pressure source inlet. The drive toothed disc will overcome the elastic force of the brake spring and move away from the upper toothed disc, thereby achieving rapid brake disengagement. This design enables the brake to respond quickly when disengagement is required, improving work efficiency.

[0015] This safety pneumatic normally closed brake simplifies the installation and disassembly process of the upper gear plate and shaft tube through the design of threaded holes and locking screws, so as to facilitate later maintenance and replacement.

[0016] This safety pneumatic normally closed brake provides additional support points through the design of needle roller bearings, thereby enhancing the brake's bending resistance and ensuring stability and reliability even when installed vertically. Attached Figure Description

[0017] Figure 1 A cross-sectional structural schematic diagram of a normally closed pneumatic safety brake.

[0018] Figure 2 This is a cross-sectional view of a traditional gear clutch.

[0019] In the picture:

[0020] 1. Shaft tube; 11. Threaded hole;

[0021] 2. Upper gear plate; 21. Locking screw; 22. Precision bearing; 23. Needle roller bearing;

[0022] 3. External gear disc;

[0023] 4. Drive gear plate;

[0024] 5. Pressure source inlet;

[0025] 6. Spring hole;

[0026] 7. Brake spring;

[0027] 8. Sealing disc; 81. Connecting screw; 82. Sealing ring. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1

[0030] This embodiment provides a safe pneumatic normally closed brake, such as Figures 1-2As shown, the safety pneumatic normally closed brake includes a shaft tube 1, an upper gear disk 2 fixedly mounted at the input end of the shaft tube 1, an outer gear disk 3 rotatably connected to the outside of the upper gear disk 2 and located at the output end of the shaft tube 1, a drive gear disk 4 disposed between the upper gear disk 2 and the outer gear disk 3 and moving axially along the shaft tube 1, and a pressure source inlet 5 disposed on the side of the drive gear disk 4 near the upper gear disk 2 for a pressure source to enter and cause the drive gear disk 4 to move and mesh with the outer gear disk 3; the safety pneumatic normally closed brake also includes a spring hole 6 disposed on the outer gear disk 3 near the drive gear disk 4, and a brake spring 7 disposed in the spring hole 6 and fixedly connected at both ends to the inner wall of the spring hole 6 and the drive gear disk 4 respectively, for causing the drive gear disk 4 to move and mesh with the upper gear disk 2 when no pressure source is supplied.

[0031] In operation, in the initial state of the brake, the brake spring 7 is compressed by the drive gear 4 into the spring hole 6 located on the outer gear 3 near the drive gear 4. At this time, the brake spring 7 is in an energy storage state, applying a certain preload to the drive gear 4. When no pressure source is supplied to the brake, the brake spring 7 in the spring hole 6 applies a pressing force to the drive gear 4 towards the upper gear 2 through its own elastic restoring force. At this time, the drive gear 4 moves axially along the shaft tube 1 under the action of this pressing force until it is tightly meshed with the end face teeth of the upper gear 2 fixedly set at the input end of the shaft tube 1. Since the upper gear 2 is fixedly connected to the shaft tube 1, after the drive gear 4 meshes with the upper gear 2, when the outer gear 3 rotates, the power can be transmitted from the outer gear 3 to the shaft tube 1 through the meshing transmission of the drive gear 4 and the upper gear 2. At this time, the brake is in the engaged state and can transmit torque normally. When the brake needs to be released, a pressure source is supplied to the brake. The pressure source enters the brake through the pressure source inlet 5 located on the side of the drive gear 4 near the upper gear 2. As the pressure source continues to supply pressure, the pressure gradually increases, generating an axial thrust on the drive gear 4 away from the upper gear 2. When this thrust is greater than the clamping force of the brake spring 7 on the drive gear 4, the drive gear 4 begins to overcome the elastic force of the brake spring 7 and moves axially away from the upper gear 2. As the drive gear 4 moves, it gradually separates from the end face teeth of the upper gear 2 and engages with the outer gear 3, cutting off the power transmission path. At this time, the brake is released and no longer transmits torque. Furthermore, during the process of the drive gear 4 moving and engaging with the outer gear 3, the brake spring 7 is also compressed so that when the air is cut off, it can push the drive gear 4 to engage with the end face teeth of the upper gear 2 again, so that the brake is in the normally closed state.

[0032] It should be noted that pressure source inlet 5 is the channel on the linear cylinder used for external pressure source input.

[0033] In order to ensure the connection between the outer gear disk 3 and the upper gear disk 2, a precision bearing 22 is fixedly sleeved on the upper gear disk 2 and contacts the inner wall of the outer gear disk 3. The precision bearing 22 is fixedly sleeved at a designated position on the upper gear disk 2, and its outer ring is in close contact with the inner wall of the outer gear disk 3, allowing relative rotation between the upper gear disk 2 and the outer gear disk 3, so as to reduce friction and wear, improve transmission efficiency, and at the same time enhance the smoothness of relative movement between the upper gear disk 2 and the outer gear disk 3, and extend the service life of the equipment.

[0034] Specifically, a sealing disc 8 is rotatably mounted on the upper gear disc 2. The sealing disc 8 is fixedly connected to the outer gear disc 3 by connecting screws 81. The drive gear disc 4 is slidably mounted between the outer gear disc 3 and the sealing disc 8. The pressure source inlet 5 is located between the sealing disc 8 and the drive gear disc 4.

[0035] By tightly fixing the sealing disc 8 and the outer gear disc 3 with the connecting screw 81, the two can form a stable whole. At the same time, the outer gear disc 3 and the sealing disc 8 form a sliding track for the drive gear disc 4, which can restrict the axial movement of the drive gear disc 4 on the shaft tube 1, ensuring the accuracy of the movement direction and path, so that the drive gear disc 4 can accurately engage or disengage with the upper gear disc 2 or the outer gear disc 3. When a pressure source is introduced into the pressure source inlet 5, since the pressure source inlet 5 is located between the sealing disc 8 and the drive gear disc 4, the pressure source can directly act on the side of the drive gear disc 4 near the sealing disc 8, generating an axial thrust away from the upper gear disc 2, pushing the drive gear disc 4 to overcome the elastic force of the brake spring 7 and move axially, realizing the separation from the upper gear disc 2, and releasing the brake. After the pressure source is stopped, under the pushing action of the elastic force of the brake spring 7, the drive gear disc 4 can move in the opposite direction to engage with the upper gear disc 2, so that the brake is re-engaged and maintained in a normally closed state.

[0036] In addition, to ensure the sealing between the sealing disc 8 and the drive gear disc 4, a sealing ring 82 is fixedly fitted on the side of the sealing disc 8 near the outer gear disc 3 and the upper gear disc 2, which is in contact with the inner wall of the drive gear disc 4. The sealing ring 82 is fixedly fitted on the side of the sealing disc 8 near the outer gear disc 3 and the upper gear disc 2, and its outer edge is in close contact with the inner wall of the drive gear disc 4, which can form an effective sealing barrier, thereby ensuring the sealing between the sealing disc 8 and the drive gear disc 4, preventing pressure source leakage, and improving the working efficiency and safety of the brake.

[0037] Example 2

[0038] Unlike Example 1, as Figure 1As shown, to facilitate the connection between the upper gear plate 2 and the shaft tube 1, a threaded hole 11 is provided at the input end of the shaft tube 1. A locking screw 21, which is compatible with the threaded hole 11, is screwed onto the upper gear plate 2 for disassembly and assembly of the upper gear plate 2 and the shaft tube 1. When it is necessary to install the upper gear plate 2 onto the shaft tube 1, the locking screw 21 is screwed into the threaded hole 11 at the input end of the shaft tube 1. As the locking screw 21 is screwed in, it gradually tightens the upper gear plate 2 and the shaft tube 1, achieving a firm connection between the two. When it is necessary to disassemble the upper gear plate 2 and the shaft tube 1, simply rotate the locking screw 21 in the opposite direction to unscrew it from the threaded hole 11, and the upper gear plate 2 and the shaft tube 1 can be easily separated. Through the cooperation of the threaded hole 11 and the locking screw 21, the installation and disassembly process of the upper gear plate 2 and the shaft tube 1 is simplified, the assembly efficiency is improved, and the stability of the connection is ensured, which facilitates later maintenance and replacement.

[0039] Example 3

[0040] Unlike Examples 1 and 2, as Figure 1 As shown, in order to improve the bending resistance, a needle roller bearing 23 is fixedly sleeved on the upper gear plate 2 and is in contact with the inner wall of the sealing plate 8. The needle roller bearing 23 is fixedly sleeved on the upper gear plate 2, and its outer ring is in close contact with the inner wall of the sealing plate 8, providing an additional support point, thereby enhancing the bending resistance of the brake, so that the brake can remain stable and safe and reliable when installed vertically, meeting the needs of industrial production and working environments with high requirements for smooth transmission.

[0041] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A safety pneumatic normally closed brake, comprising a shaft tube (1), an upper gear disk (2) fixedly disposed at the input end of the shaft tube (1), an outer gear disk (3) rotatably connected to the outside of the upper gear disk (2) and located at the output end of the shaft tube (1), a drive gear disk (4) disposed between the upper gear disk (2) and the outer gear disk (3) and moving axially along the shaft tube (1), and a pressure source inlet (5) disposed on the side of the drive gear disk (4) near the upper gear disk (2) for a pressure source to enter and cause the drive gear disk (4) to move and mesh with the outer gear disk (3); Its features are: The safety pneumatic normally closed brake also includes a spring hole (6) on the outer gear plate (3) near the drive gear plate (4) and a brake spring (7) disposed in the spring hole (6) and fixedly connected at both ends to the inner wall of the spring hole (6) and the drive gear plate (4) respectively, for moving the drive gear plate (4) to mesh with the upper gear plate (2) when no pressure source is supplied.

2. The safety pneumatic normally closed brake according to claim 1, characterized in that: The input end of the shaft tube (1) is provided with a threaded hole (11), and the upper gear plate (2) is screwed with a stop screw (21) that is compatible with the threaded hole (11) for disassembling and assembling the upper gear plate (2) and the shaft tube (1).

3. The safety pneumatic normally closed brake according to claim 1, characterized in that: A precision bearing (22) is fixedly sleeved on the upper gear disk (2) and connected to the inner wall of the outer gear disk (3).

4. The safety pneumatic normally closed brake according to claim 3, characterized in that: A sealing disc (8) is rotatably mounted on the upper gear disc (2). The sealing disc (8) is fixedly connected to the outer gear disc (3) by a connecting screw (81). The driving gear disc (4) is slidably mounted between the outer gear disc (3) and the sealing disc (8). The pressure source inlet (5) is located between the sealing disc (8) and the driving gear disc (4).

5. The safety pneumatic normally closed brake according to claim 4, characterized in that: A needle roller bearing (23) is fixedly sleeved on the upper gear plate (2) and connected to the inner wall of the sealing plate (8).

6. The safety pneumatic normally closed brake according to claim 4, characterized in that: The sealing disc (8) is fixedly fitted with a sealing ring (82) that is in contact with the inner wall of the drive gear disc (4) on the side of the sealing disc (8) near the outer gear disc (3) and the upper gear disc (2).

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