Planetary speed-increasing and torque-reducing safety brake of crane

Abstract

The utility model relates to the technical field of safety brakes, and discloses a planet speed-increasing and torque-reducing safety brake of a crane, which comprises two planet gear sets, a brake structure is arranged between the two planet gear sets, and the brake structure comprises two movable discs respectively arranged on one sides of the two planet gear sets. A plurality of connecting shafts are rotationally arranged on one side of the movable disc and fixed to planet gears in the planet gear sets, a fixed shaft is fixed to one side of the movable disc on the left side and fixed to a sun gear in the planet gear set on the right side, an installation shaft is fixed to one side of the movable disc on the right side, and a torque reducing cylinder is fixed to one end of the installation shaft. The rotating shaft transmits torque to the torque reducing cylinder through weakening of the two planetary gear sets, the air cylinder drives the friction plate to make contact with the torque reducing cylinder, rotation of the torque reducing cylinder is stopped through friction, rotation of the winding shaft is stopped, and in this way, the torque generated after the winding shaft stalls is reduced, and the braking effect of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to safety brake technical field especially relates to a crane planetary speed increasing and torque reducing safety brake. BACKGROUND

[0002] At present, when crane overspeeds due to overload, power failure and other accidents, in order to avoid accidents, safety brake is generally set to brake, which is crucial to prevent accidental sliding or overspeed, and the brake will automatically lock the transmission system when the load is too large or the transmission fails, protecting the equipment and operators.

[0003] The existing double-beam bridge crane with safety brake (publication number: CN220578762U) has at least the following disadvantages: although the device uses the card wheel to be thrown out and clamped with the clamping ring under the action of centrifugal force when the winding shaft accelerates rotation, the braking effect of the winding shaft is realized, however, when the winding roller accelerates rotation, the torque becomes larger, and the card wheel and the clamping ring are prone to gear collision when clamped, thereby causing equipment failure and further leading to poor braking effect of the device, therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a crane planetary speed increasing and torque reducing safety brake.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A crane planetary speed increasing and torque reducing safety brake, comprising two planetary gear sets, a brake structure is arranged between the two planetary gear sets, the brake structure comprises two movable discs arranged on one side of the two planetary gear sets respectively, a plurality of connecting shafts are rotatably arranged on one side of the movable disc, the connecting shafts are fixed with planetary gears inside the planetary gear set, a fixed shaft is fixed on one side of the left movable disc, the fixed shaft is fixed with a sun gear inside the planetary gear set on the right side, an installation shaft is fixed on one side of the right movable disc, and a torque reduction cylinder is fixed on one end of the installation shaft.

[0007] As a further scheme of the utility model, two friction plates are arranged on one side of the planetary gear set on the right side, both of the friction plates are semi-annular, the torque reduction cylinder is located between the two friction plates and has a spacing with the two friction plates, and a gas cylinder is fixed on the top surface of the upper friction plate.

[0008] As a further scheme of the utility model, a protective cylinder is fixed on one side of the planetary gear set on the right side, and the torque reduction cylinder and the friction plate are located inside the protective cylinder.

[0009] As a further scheme of the utility model, the top surface of the protection cylinder is fixed with a mounting frame, a limiting rod is slidably inserted into the top surface of the protection cylinder, the bottom end of the limiting rod penetrates the outer circular wall surface of the protection cylinder and is fixed with the top surface of the friction plate, and the air cylinder is fixed with the mounting frame.

[0010] As a further scheme of the utility model, the bottom surface of the planetary gear set is provided with a base, the top surface of the base is an arc surface, and the top surface of the base is fixed with the outer circular wall surfaces of the two planetary gear sets.

[0011] As a further scheme of the utility model, one side of the movable disc is fixed with a plurality of bearings, and a plurality of connecting shafts are fixed with the inner ring inner wall surfaces of the plurality of bearings.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The safety brake, through the setting of the brake structure, the sun gear in the planetary gear set drives the planetary gear to rotate when the rotating shaft rotates, the planetary gear drives the movable disc and the fixed shaft to rotate through the connecting shaft, so that the rotation of the rotating shaft is transmitted to the fixed shaft, and the torque of the rotating shaft is preliminarily reduced, the sun gear in the right planetary gear set is driven to rotate when the fixed shaft rotates, and the mounting shaft and the torque reduction cylinder are driven to rotate through the transmission of the planetary gear and the connecting shaft, so that the torque of the rotating shaft is further reduced;

[0014] The rotating shaft transmits the torque to the torque reduction cylinder through the weakening of the two planetary gear sets, the air cylinder drives the friction plate to contact the torque reduction cylinder, and the rotation of the torque reduction cylinder is stopped through friction, so that the rotation of the winding shaft is stopped, through the above mode, the torque of the winding shaft after stalling is reduced, and the braking effect of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural schematic view of a crane planetary speed-increasing torque-reducing safety brake is provided for the utility model;

[0016] Figure 2 A split structural schematic view of a crane planetary speed-increasing torque-reducing safety brake is provided for the utility model;

[0017] Figure 3 A split structural schematic view of a movable disc of a crane planetary speed-increasing torque-reducing safety brake is provided for the utility model;

[0018] Figure 4 A split structural schematic view of a protection cylinder of a crane planetary speed-increasing torque-reducing safety brake is provided for the utility model.

[0019] In the figure: 1. Planetary gear set; 2. Mounting shaft; 201. Movable plate; 202. Connecting shaft; 203. Fixed shaft; 204. Torque reducing cylinder; 205. Friction plate; 206. Cylinder; 3. Protective cylinder; 4. Mounting frame; 401. Limit rod; 5. Base; 6. Bearing. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1-4 As shown, a planetary speed increasing and torque reducing safety brake for a crane comprises two planetary gear sets 1, a braking structure is arranged between the two planetary gear sets 1, the braking structure comprises two movable disks 201 respectively arranged on one side of the two planetary gear sets 1, a plurality of connecting shafts 202 are rotatably arranged on one side of the movable disk 201, the connecting shafts 202 are fixed to the planetary gears inside the planetary gear set 1, a fixed shaft 203 is fixed to one side of the movable disk 201 on the left, the fixed shaft 203 is fixed to the sun gear inside the planetary gear set 1 on the right, a mounting shaft 2 is fixed to one side of the movable disk 201 on the right, a torque reducing cylinder 204 is fixed to one end of the mounting shaft 2, and the planetary gear set 1 is the prior art.

[0024] In this embodiment, two friction plates 205 are arranged on one side of the right planetary gear set 1, both of which are semi-annular, and the torque reduction cylinder 204 is arranged between the two friction plates 205 and has a spacing with the two friction plates 205. The top surface of the upper friction plate 205 is fixed with a cylinder 206. The friction plate 205 is a prior art. By arranging the brake structure, the staff fixes the rotating shaft of the winding shaft with the sun gear in the left planetary gear set 1. When the rotating shaft rotates, the sun gear in the planetary gear set 1 drives the planetary gear to rotate. The rotation of the planetary gear drives the movable disc 201 and the fixed shaft 203 through the connecting shaft 202 to rotate, so that the rotation of the rotating shaft is transmitted to the fixed shaft 203, and the torque of the rotating shaft is preliminarily reduced. When the fixed shaft 203 rotates, it drives the sun gear in the right planetary gear set 1 to rotate, and drives the mounting shaft 2 and the torque reduction cylinder 204 to rotate through the planetary gear and the connecting shaft 202, so as to further reduce the torque of the rotating shaft. When the winding shaft fails to rotate rapidly, the rotating shaft transmits the torque to the torque reduction cylinder 204 through the two planetary gear sets 1. Then the staff starts the cylinder 206, which drives the friction plate 205 to contact with the torque reduction cylinder 204, and stops the rotation of the torque reduction cylinder 204 through friction, so as to stop the rotation of the winding shaft. Through the above mode, the torque of the winding shaft after stalling is reduced, and the braking effect of the device is improved.

[0025] In this embodiment, a protective cylinder 3 is fixed on one side of the right planetary gear set 1, and the torque reduction cylinder 204 and the friction plate 205 are arranged inside the protective cylinder 3. The protective cylinder 3 can protect the torque reduction cylinder 204 and the friction plate 205, and improve the safety of the device in operation.

[0026] In this embodiment, the top surface of the protective cylinder 3 is fixed with a mounting frame 4, and the top surface of the protective cylinder 3 is slidably inserted with a limiting rod 401. The bottom end of the limiting rod 401 penetrates the outer circular wall surface of the protective cylinder 3 and is fixed with the top surface of the friction plate 205. The cylinder 206 is fixed with the mounting frame 4. When the cylinder 206 drives the friction plate 205 to ascend and descend, the limiting rod 401 guides and limits the ascending and descending of the friction plate 205, so that the movement is more stable.

[0027] In this embodiment, the bottom surface of the planetary gear set 1 is provided with a base 5, and the top surface of the base 5 is arc-shaped. The top surface of the base 5 is fixed with the outer circular wall surfaces of the two planetary gear sets 1. The base 5 can stably support the planetary gear set 1.

[0028] In this embodiment, a plurality of bearings 6 are fixed on one side of the movable disc 201, and a plurality of connecting shafts 202 are fixed with the inner ring inner wall surfaces of the plurality of bearings 6. When the sun gear in the planetary gear set 1 drives the planetary gear to rotate, the planetary gear revolves around the sun gear and rotates around its own axis. The bearings 6 can make the planetary gear rotate without affecting the rotation of the movable disc 201.

[0029] Working principle: in use, the staff will be wound axis of rotation of the sun with the left planetary gear set 1, the sun gear rotation axis rotation through the planetary gear set 1 in the sun gear drive planetary gear rotation, planetary gear rotation through the connecting shaft 202 drive movable disc 201 and fixed shaft 203 rotation, so that the rotation of the rotating shaft to the fixed shaft 203, while the torque of the rotating shaft for preliminary reduction, fixed shaft 203 rotation drive sun gear in the right planetary gear set 1, through the planetary gear and connecting shaft 202 drive installation shaft 2 and torque reduction cylinder 204 rotation, so as to further reduce the torque of the rotating shaft, when the winding shaft failure fast rotation, the rotating shaft will torque through the two planetary gear set 1 of weakening transmission to torque reduction cylinder 204, then the staff start cylinder 206, cylinder 206 drive friction plate 205 and torque reduction cylinder 204 contact, through the friction stop torque reduction cylinder 204 rotation, so as to stop the rotation of the winding shaft, through the protection cylinder 3 can be protected torque reduction cylinder 204 and friction plate 205, improve the safety of the device operation, when the cylinder 206 drive friction plate 205 to ascend, limit rod 401 to friction plate 205 ascension direction and limit, make its movement more stable, through the base 5 can be stable support planetary gear set 1, when the sun gear inside planetary gear set 1 drive planetary gear rotation, the planetary gear revolves around the sun gear and rotation, through the bearing 6 can make the planetary gear rotation when not to the rotation of the movable disc 201 influence.

[0030] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principles of the present application, without departing from the spirit and scope of the present application, the present application will have various changes and improvements, these changes and improvements all fall within the scope of the present application.

Claims

1. A planetary speed-increasing torque-reducing safety brake for a crane, comprising two planetary gear sets (1), characterized in that: A braking structure is provided between the two planetary gear sets (1), and the braking structure comprises two movable disks (201) respectively provided on one side of the two planetary gear sets (1); a plurality of connecting shafts (202) are rotatably provided on one side of the movable disk (201); the connecting shafts (202) are fixed to the planetary gears inside the planetary gear sets (1); a fixed shaft (203) is fixed to one side of the movable disk (201) on the left; the fixed shaft (203) is fixed to the sun gear inside the planetary gear set (1) on the right; a mounting shaft (2) is fixed to one side of the movable disk (201) on the right; a torque reducing cylinder (204) is fixed to one end of the mounting shaft (2).

2. The planetary speed increasing torque reducing safety brake for a crane according to claim 1, characterized in that: Two friction plates (205) are provided on one side of the planetary gear set (1) on the right side. Both friction plates (205) are semi-annular. The torque reducing cylinder (204) is located between the two friction plates (205) and has a spacing with the two friction plates (205). A cylinder (206) is fixed on the top surface of the upper friction plate (205).

3. The planetary speed increasing and torque reducing safety brake for a crane according to claim 2, characterized in that: A protective cylinder (3) is fixed to one side of the planetary gear set (1) on the right side, and the torque reduction cylinder (204) and the friction plate (205) are both located inside the protective cylinder (3).

4. The planetary speed increasing and torque reducing safety brake for a crane according to claim 3, characterized in that: The top surface of the protective cylinder (3) is fixed with a mounting frame (4), the top surface of the protective cylinder (3) is slidably inserted with a limiting rod (401), the bottom end of the limiting rod (401) passes through the outer circular wall surface of the protective cylinder (3) and is fixed to the top surface of the friction plate (205), and the cylinder (206) is fixed to the mounting frame (4).

5. The planetary speed increasing and torque reducing safety brake for a crane according to claim 4, characterized in that: The bottom surface of the planetary gear set (1) is provided with a base (5), the top surface of the base (5) is an arc surface, and the top surface of the base (5) is fixed to the outer circular wall surfaces of the two planetary gear sets (1).

6. The planetary speed increasing and torque reducing safety brake for a crane according to claim 5, characterized in that: A plurality of bearings (6) are fixed on one side of the movable disk (201), and a plurality of connecting shafts (202) are respectively fixed to the inner wall surfaces of the inner rings of the plurality of bearings (6).

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