Self-locking device of anti-running brake

Abstract

The utility model relates to the technical field of brakes, in particular to a self-locking device of an anti-running brake, which is used for braking a shaft body and comprises a brake box, two groups of brake plates and a driving shaft, a channel for the shaft body to penetrate through is arranged in the brake box, the two groups of brake plates are respectively arranged on two sides of the shaft body, and the brake plates are fixedly connected with corresponding driving plates. The two sets of driving shafts are in transmission connection through transmission parts, one set of driving shafts is driven by a power assembly to rotate, the two sides of each driving shaft are each provided with a set of external threaded pipes in a mirroring mode, the two sides of each driving plate are each provided with a set of internal threaded blocks, and the internal threaded blocks at the two ends of each driving plate and the external threaded pipes at the same ends of the two sets of driving shafts form screw pair transmission. The power assembly comprises the transmission worm gear and the worm which are in transmission connection, and by means of the self-locking characteristics of the transmission worm gear and the worm, when the driving force of the worm is prevented from being disconnected, it can still be guaranteed that the brake plate brakes and decelerates the shaft body.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a self-locking device for an anti-runaway brake. Background Art

[0002] A brake is a device that has the function of slowing down, stopping or keeping a moving part (or moving machinery) in a stopped state. It is a mechanical part that stops or slows down the moving parts in a machine, commonly known as brakes, etc.

[0003] When the brake is used in a device, it is often used to brake the shaft, such as the currently commonly used anti-runaway brake, which drives the brake plate to stick to the outside of the shaft, and uses the friction between the brake plate and the shaft to slow down and lock the shaft.

[0004] At present, the brake plate of the anti-runaway brake is mainly driven and moved by a hydraulic or electric device. When the hydraulic or electric power fails due to an abnormal situation, the brake plate is likely to be separated from the shaft body, and the safety of the shaft operation is greatly reduced. Utility Model Content

[0005] The purpose of the utility model is to provide a self-locking device for an anti-runaway brake, which is used to solve the problem that the brake plate of the current anti-runaway brake is mainly driven to move by a hydraulic or electric device. When the hydraulic or electric power fails due to an abnormal situation, the brake plate is easily separated from the shaft body, and the safety of the shaft operation is greatly reduced.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a self-locking device of an anti-running brake, which is used to brake the shaft body, comprising:

[0007] A brake box, in which a passage is provided for the shaft to pass through;

[0008] Brake plates are installed inside the brake box, and there are two sets of brake plates, which are respectively arranged on both sides of the shaft body. The brake plates are fixedly installed on the corresponding drive plates through connecting pieces;

[0009] There are two sets of drive shafts, which are rotatably installed inside the brake box. The two sets of drive shafts are connected through transmission parts, and one set of drive shafts is driven to rotate by a power assembly. A set of external threaded tubes are mirror-set on both sides of the drive shafts, and a set of internal threaded blocks are respectively set on both sides of the drive plate. The internal threaded blocks at both ends of the drive plate form a spiral pair transmission with the external threaded tubes at the same end of the two sets of drive shafts. The two sets of drive shafts rotate to drive the two sets of drive plates and the corresponding connected brake plates to move in a mirror-image manner.

[0010] The power assembly comprises a transmission worm wheel and a worm connected in transmission, the transmission worm wheel is coaxially mounted on the end of the corresponding driving shaft, the worm is rotatably mounted on the brake box, and the worm is driven to rotate by the power member.

[0011] As a further solution of the utility model, the brake plate is provided with an arc-shaped structure close to the shaft body to match the shaft body.

[0012] As a further solution of the present invention, the connecting member is a connecting column, and the brake plate is fixedly connected to the corresponding driving plate through multiple groups of connecting columns.

[0013] As a further solution of the utility model, the externally threaded tube is coaxially fixedly mounted on the corresponding driving shaft.

[0014] As a further solution of the utility model, the power component is a power motor, and the power motor is fixedly installed on the brake box, and the output shaft of the power motor is fixedly connected to one end of the worm through a coupling.

[0015] Compared with the prior art, the utility model designs a power assembly consisting of a transmission worm wheel and a worm to drive the two sets of drive shafts to rotate, thereby driving the two sets of support plates to move. The self-locking characteristics of the worm and the transmission worm wheel (the transmission worm wheel can only be driven to rotate in one direction by the worm) are utilized to ensure that when the power source of the worm (power motor) is abnormal and the worm is in a fixed state, the transmission worm wheel stops rotating, thereby avoiding displacement of the brake plate and improving the safety of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a structural schematic diagram of a self-locking device for an anti-runaway brake.

[0017] Figure 2 This is a structural schematic diagram of the power assembly provided by the utility model.

[0018] Figure 3 This is a schematic structural diagram of the drive shaft provided by the utility model.

[0019] In the attached drawings: 1. brake box; 2. drive shaft; 201. external threaded pipe; 3. shaft body; 4. brake plate; 5. connecting column; 6. drive plate; 7. internal thread block; 8. transmission belt; 9. power assembly; 901. transmission worm gear; 902. worm; 903. power motor. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0021] like Figure 1 and Figure 2As shown, in the embodiment of the utility model, a self-locking device of an anti-running brake is used to brake the shaft body 3, including a brake box 1, which is provided with a channel for the shaft body 3 to pass through; brake plates 4, which are installed inside the brake box 1, and the number is two groups, which are respectively arranged on both sides of the shaft body 3, and the brake plates 4 are fixedly installed on the corresponding driving plates through connecting members; driving shafts 2, the number is two groups, which are rotatably installed inside the brake box 1, and the two groups of driving shafts 2 are connected by transmission members, and one group of driving shafts 2 is driven to rotate by a power assembly 9, and a group of external threaded tubes 201 are mirror-imaged on both sides of the driving shaft 2, and a group of internal threaded blocks 7 are respectively provided on both sides of the driving plate, and the internal threaded blocks 7 at both ends of the driving plate respectively form a spiral pair transmission with the external threaded tube 201 at the same end of the two groups of driving shafts 2, and the two groups of driving shafts 2 are rotated to drive the two groups of driving plates and the correspondingly connected brake plates 4 to move in a mirrored manner;

[0022] The power assembly 9 includes a transmission worm wheel 901 and a worm 902 which are transmission-connected. The transmission worm wheel 901 is coaxially mounted on the end of the corresponding drive shaft 2. The worm 902 is rotationally mounted on the brake box 1 and is driven to rotate by the power member.

[0023] Specifically in the present invention, the brake box 1 can be a closed type, and a mounting hole for the shaft body 3 to pass through is provided on the brake box 1. When the braking operation is performed, the device can be prevented from entering the brake box 1 and causing pollution to the shaft body 3 and the brake plate 4. Of course, when the braking environment is relatively clean, an open brake box 1 can also be selected to facilitate the operator to inspect and repair the components in the brake box 1;

[0024] The utility model uses two brake plates 4. When braking, the two groups of brake plates 4 are close to each other and press the surface of the shaft body 3 to brake the shaft body 3. The two groups of brake plates 4 move in a mirrored manner along both sides of the shaft body 3 and contact the side surfaces of the shaft body 3 at the same time, avoiding the problem of inconsistent wear of the two groups of brake plates 4.

[0025] like Figure 1 As shown, in the embodiment of the utility model, the brake plate 4 close to the shaft body 3 is an arc-shaped structure adapted to the shaft body 3, and the arc-shaped brake plate 4 fits the outer wall of the shaft body 3 more closely;

[0026] At the same time, the connecting piece is a connecting column 5, and the brake plate 4 is fixedly connected to the corresponding driving plate through multiple groups of connecting columns 5. The utility model supports the brake plate 4 through multiple groups of connecting columns 5 to ensure that when the brake plate 4 is in contact with the shaft body 3, different positions of the brake plate 4 are tightly fitted with the shaft body 3, thereby ensuring the braking efficiency of the brake plate 4 and avoiding the problem of deformation when the brake plate 4 is pressed against the shaft body 3.

[0027] like Figure 3As shown, in the embodiment of the utility model, the external threaded tube 201 is coaxially fixedly installed on the corresponding driving shaft 2. The external threaded tube 201 in the utility model is fixedly installed on the driving shaft 2 by fastening bolts. Mounting holes and threaded holes for installing fastening bolts are correspondingly arranged on the external threaded tube 201 and the driving shaft 2. Two groups of external threaded tubes 201 are mirror-imaged at both ends of the driving shaft 2, and the length specification of the external threaded tube 201 can be selected according to the moving distance of the brake plate 4, so as to avoid the situation where the length specification of the external threaded tube 201 is too long and waste is caused.

[0028] like Figure 2 As shown, in the embodiment of the utility model, the power member is a power motor 903, and the power motor 903 is fixedly mounted on the brake box 1. The output shaft of the power motor 903 is fixedly connected to one end of the worm 902 through a coupling. In the utility model, the power motor 903 is the only power source. The power motor 903 rotates to drive the worm 902 to rotate, thereby driving the transmission worm wheel 901 and the corresponding connected drive shaft 2 to rotate;

[0029] Furthermore, the transmission member is a transmission belt 8, and the ends of the two groups of drive shafts 2 are correspondingly provided with transmission wheels for connecting the transmission belt 8. The utility model drives the two ends of the drive plate to move in the same direction by synchronously rotating the two groups of drive shafts 2, and the two groups of drive plates are close to each other to drive the brake plate 4 and the surface of the shaft body 3 to press and brake;

[0030] By utilizing the self-locking characteristics of the worm 902 and the transmission worm wheel 901, the transmission worm wheel 901 is driven to rotate by the rotation of the worm 902. Conversely, when the worm 902 does not rotate, the transmission worm wheel 901 cannot drive the worm 902 to rotate, and the transmission worm wheel 901 is in a self-locking state, which can ensure that the brake plate 4 is in a stopped state and prevent the brake plate 4 from being displaced.

[0031] In summary, the utility model designs a power assembly 9 composed of a transmission worm gear 901 and a worm 902, which drives the two groups of drive shafts 2 to rotate, and then drives the two groups of support plates to move, wherein the self-locking characteristics of the transmission between the worm 902 and the transmission worm gear 901 (the transmission worm gear 901 can only be driven to rotate in one direction by the worm 902) are utilized to ensure that when the power source (power motor 903) of the worm 902 is abnormal and the worm 902 is in a fixed state, the transmission worm gear 901 stops rotating, thereby avoiding displacement of the brake plate 4, thereby improving the safety of the utility model.

Claims

1. A self-locking device for an anti-running brake, used for braking a shaft, characterized in that: include: A brake box, in which a passage is provided for the shaft to pass through; Brake plates are installed inside the brake box, and there are two sets of brake plates, which are respectively arranged on both sides of the shaft body. The brake plates are fixedly installed on the corresponding drive plates through connecting pieces; There are two sets of drive shafts, which are rotatably installed inside the brake box. The two sets of drive shafts are connected through transmission parts, and one set of drive shafts is driven to rotate by a power assembly. A set of external threaded tubes are mirror-set on both sides of the drive shafts, and a set of internal threaded blocks are respectively set on both sides of the drive plate. The internal threaded blocks at both ends of the drive plate form a spiral pair transmission with the external threaded tubes at the same end of the two sets of drive shafts. The two sets of drive shafts rotate to drive the two sets of drive plates and the corresponding connected brake plates to move in a mirror-image manner. The power assembly comprises a transmission worm wheel and a worm connected in transmission, the transmission worm wheel is coaxially mounted on the end of the corresponding driving shaft, the worm is rotatably mounted on the brake box, and the worm is driven to rotate by the power member.

2. The self-locking device of the anti-runaway brake according to claim 1, characterized in that: The side of the brake plate close to the shaft body is an arc-shaped structure adapted to the shaft body.

3. The self-locking device of the anti-runaway brake according to claim 1, characterized in that: The connecting member is a connecting column, and the brake plate is fixedly connected to the corresponding driving plate through multiple groups of connecting columns.

4. The self-locking device of the anti-runaway brake according to claim 1, characterized in that: The externally threaded tube is coaxially fixedly mounted on the corresponding driving shaft.

5. The self-locking device of the anti-runaway brake according to claim 1, characterized in that: The power component is a power motor, which is fixedly mounted on the brake box, and the output shaft of the power motor is fixedly connected to one end of the worm through a coupling.

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