Transmission shaft with overload protection

Abstract

The transmission shaft with the overload protection function comprises a front shaft body and a rear shaft body which are collinear, a first connecting disc is arranged at one end of the front shaft body, a plurality of connecting holes are formed in the first connecting disc, a second connecting disc with the same specification as the first connecting disc is arranged on the rear shaft body, and the front shaft body and the rear shaft body are connected through bolts inserted into the connecting holes. The end of the bolt is locked through a nut, and a collecting mechanism is arranged on the front shaft body. The collecting mechanism comprises a fixing ring sleeving the outer wall of the front shaft body and a mounting ring slidably connected to the outer wall of the front shaft body, a magnetic plate is embedded in one side, close to the first connecting disc, in the mounting ring, a spring sleeves the outer wall of the front shaft body between the fixing ring and the mounting ring, one end of the spring is connected with the fixing ring, and the other end of the spring is connected with the mounting ring. Through the arrangement of the fixing ring, the mounting ring and the magnetic plate, after the bolt is fractured, the fractured bolt can be attracted through the magnetic plate, and therefore the possibility that the fractured bolt affects normal work of other mechanical parts is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shafts, and particularly to a transmission shaft with overload protection. Background Art

[0002] A transmission shaft with overload protection is a mechanical component designed to provide protection when exceeding the normal working load. It usually includes special mechanical structures or materials that can trigger a protection mechanism when detecting abnormal loads, prevent the transmission shaft from being damaged due to excessive stress, thereby extending the service life of the equipment and reducing maintenance costs.

[0003] It is retrieved that the Chinese patent with the application number 202021381069.0 discloses a transmission shaft with mechanical overload protection, which includes a front shaft body. An installation plate is fixedly connected to the outer surface of the front shaft body. The bottom of the front shaft body is movably connected to a rear shaft body. A connecting plate is fixedly installed on the outer surface of the rear shaft body. A cylinder is fixedly connected between the front shaft body and the rear shaft body. Installation seats are fixedly installed on the left and right sides of the bottom of the connecting plate. Moving plates are movably installed inside the two installation seats. Springs are fixedly connected to the bottoms of the moving plates. The bottoms of the two springs are fixedly connected to the inner bottom wall of the installation seats. The top of the installation plate is movably connected to two screws that penetrate and extend into the installation seats. Limit plates are fixedly installed on the tops of the two screws. Clamping parts that penetrate and extend into the installation plate are fixedly connected to the bottoms of the two limit plates. Nuts are movably installed on the outer surfaces of the two screws. Through the force analysis of the torque machine, the matching strength between the screw and the nut is set to an appropriate state. When the torque between the front shaft body and the rear shaft body is too large, the screw breaks, thereby protecting the front shaft body and the rear shaft body from being damaged. However, the broken screw may fall off, thus affecting the normal operation of other mechanical components and posing a relatively large safety hazard. Content of the Utility Model

[0004] The utility model provides a transmission shaft with overload protection, aiming to solve the problem that after the front shaft body and the rear shaft body of the transmission shaft are damaged, the falling off of the broken screw will affect the normal operation of the equipment and pose a relatively large safety hazard.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A transmission shaft with overload protection, the transmission shaft includes a coaxial front shaft body and a rear shaft body. One end of the front shaft body is provided with a first connection disk, and a plurality of connection holes are provided on the first connection disk. One end of the rear shaft body close to the front shaft body is provided with a second connection disk with the same specification as the first connection disk. The front shaft body and the rear shaft body are connected by bolts inserted into the connection holes on the first connection disk and the second connection disk in sequence, and the bolt ends are locked by nuts. And a collection mechanism is provided on the front shaft body;

[0007] The collecting mechanism includes a fixing ring sleeved on the outer wall of the front shaft body and a mounting ring slidably connected to the outer wall of the front shaft body. A magnetic plate is embedded in the mounting ring near one side of the first connection disk. A spring is sleeved on the outer wall of the front shaft body between the fixing ring and the mounting ring. One end of the spring is connected to the fixing ring, and the other end is connected to the mounting ring.

[0008] Further, a threaded sleeve is fixedly connected to the outer wall of the rear shaft body near the front shaft body. A limiting ring is movably connected to the threaded sleeve. A threaded ring is also rotatably connected to the threaded sleeve, and one end of the threaded ring is movably connected to one side of the limiting ring.

[0009] Further, a through groove adapted to the bolt is formed in the limiting ring, and the end of the bolt penetrates through the through groove.

[0010] Further, a nut is clamped between the second connection disk and the limiting ring, and both sides of the nut are respectively in contact with the second connection disk and the limiting ring.

[0011] Further, the connection holes on the first connection disk and the second connection disk are distributed in an annular array.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. For the drive shaft with overload protection provided by the present utility model, through the fixing ring, mounting ring and magnetic plate provided on the front shaft body, after the bolt breaks, the broken bolt can be adsorbed by the magnetic plate, thereby effectively reducing the possibility that the broken bolt affects the normal operation of other mechanical components. The structural design is ingenious, practical and convenient.

[0014] 2. For the drive shaft with overload protection provided by the present utility model, through the threaded sleeve, threaded ring and limiting ring provided on the rear shaft body, the nut is clamped between the second connection disk and the limiting ring. When the bolt breaks, the other part will remain inside the nut, thereby effectively reducing the possibility that the nut falls off and affects the operation of other mechanical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the drive shaft with overload protection of the present utility model;

[0016] Figure 2 is an installation schematic diagram of the drive shaft with overload protection of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the front shaft body of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the rear shaft body of the present utility model.

[0019] In the figure: 1. Front shaft body; 2. Rear shaft body; 3. First connection disk; 4. Second connection disk; 5. Fixed ring; 6. Spring; 7. Mounting ring; 8. Magnetic plate; 9. Limit ring; 10. Threaded sleeve; 11. Threaded ring; 12. Bolt; 13. Nut; 14. Connection hole. Specific implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] As Figures 1-4 shown, the present invention is a transmission shaft with overload protection. The transmission shaft includes a coaxial front shaft body 1 and a rear shaft body 2. One end of the front shaft body 1 is provided with a first connection disk 3, and four connection holes 14 distributed in a circular array are provided on the first connection disk 3. One end of the rear shaft body 2 close to the front shaft body 1 is provided with a second connection disk 4 having the same specification as the first connection disk 3. The front shaft body 1 and the rear shaft body 2 are connected by bolts 12 sequentially inserted into the connection holes 14 on the first connection disk 3 and the second connection disk 4. The end of the bolt 12 is locked by a nut 13, and a collecting mechanism for collecting the broken bolts 12 is provided on the front shaft body 1;

[0022] The collecting mechanism includes a fixed ring 5 sleeved on the outer wall of the front shaft body 1 and a mounting ring 7 slidably connected to the outer wall of the front shaft body 1. A magnetic plate 8 for adsorbing the broken bolts 12 is embedded on one side of the mounting ring 7 close to the first connection disk 3. A spring 6 is sleeved on the outer wall of the front shaft body 1 between the fixed ring 5 and the mounting ring 7. One end of the spring 6 is connected to the fixed ring 5, and the other end is connected to the mounting ring 7.

[0023] The front shaft body 1 and the rear shaft body 2 of the transmission shaft are connected by bolts 12. Appropriate bolts 12 are selected through force analysis by a torque machine. When the torque between the front shaft body 1 and the rear shaft body 2 is too large, the bolts 12 will break, thereby protecting the front shaft body 1 and the rear shaft body 2 from damage. After the bolts 12 are installed, manually drag the mounting ring 7 so that the magnetic plate 8 inside it adsorbs the bolts 12. At this time, the spring 6 is stretched accordingly. When the bolts 12 break, a part of them will remain on the magnetic plate 8. Under the action of the spring 6, the mounting ring 7 is reset, and at the same time, it takes the broken bolts 12 out of the inside of the first connection disk 3, which is convenient for the staff to handle, thereby reducing the possibility of affecting the work of other mechanical components.

[0024] A first connecting disk 3 and a second connecting disk 4 are respectively connected to the front axle body 1 and the rear axle body 2. When the first connecting disk 3 and the second connecting disk 4 are in contact, a bolt 12 is inserted into the interior of a connecting hole 14, and then fixation is achieved by screwing a nut 13 onto the bolt 12, so as to improve the stability of the connection between the front axle body 1 and the rear axle body 2.

[0025] Wherein, in order to reduce the possibility that the nut 13 falls off and affects the operation of other components, a threaded sleeve 10 is fixedly connected to the outer wall of the rear axle body 2 on the side close to the front axle body 1. A limiting ring 9 is movably connected to the threaded sleeve 10, and a threaded ring 11 is also rotatably connected to the threaded sleeve 10, and one end of the threaded ring 11 is movably connected to one side of the limiting ring 9. Four through grooves adapted to the bolt 12 are formed in the limiting ring 9, and the end of the bolt 12 passes through the through grooves. The nut 13 is clamped between the second connecting disk 4 and the limiting ring 9, and both sides of the nut 13 are respectively in contact with the second connecting disk 4 and the limiting ring 9.

[0026] The threaded sleeve 10, the threaded ring 11 and the limiting ring 9 are provided to reduce the possibility that the other part after the bolt 12 breaks and the nut 13 affect the operation of other mechanical components. After the bolt 12 and the nut 13 are installed, the limiting ring 9 can be moved so that the bolt 12 passes through the through grooves in the limiting ring 9, and the limiting ring 9 is brought into contact with the nut 13. Then the threaded ring 11 is rotated until the threaded ring 11 is tightly attached to the limiting ring 9. At this time, one side of the nut 13 is tightly attached to the second connecting disk 4, and the other side is tightly attached to the limiting ring 9, and the nut 13 is tightly clamped between the two. When the other part of the bolt 12 breaks, it will remain inside the nut 13, thus effectively reducing the possibility that the nut 13 falls off and affects the operation of other mechanical components.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A transmission shaft with overload protection, characterized in that: The transmission shaft comprises a front axle body (1) and a rear axle body (2) which are collinear, a first connecting plate (3) being provided at one end of the front axle body (1), a plurality of connecting holes (14) being provided on the first connecting plate (3), a second connecting plate (4) having the same specifications as the first connecting plate (3) being provided at one end of the rear axle body (2) close to the front axle body (1), the front axle body (1) and the rear axle body (2) being connected by bolts (12) which are inserted into the connecting holes (14) on the first connecting plate (3) and the second connecting plate (4) in sequence, the ends of the bolts (12) being locked by nuts (13), and a collecting mechanism being provided on the front axle body (1); The collecting mechanism comprises a fixing ring (5) sleeved on the outer wall of the front shaft body (1) and a mounting ring (7) slidably connected to the outer wall of the front shaft body (1); a magnetic plate (8) is embedded in the mounting ring (7) on a side close to the first connecting plate (3); a spring (6) is sleeved on the outer wall of the front shaft body (1) between the fixing ring (5) and the mounting ring (7); one end of the spring (6) is connected to the fixing ring (5) and the other end is connected to the mounting ring (7).

2. A transmission shaft with overload protection according to claim 1, characterized in that: A threaded sleeve (10) is fixedly connected to the outer wall of the rear axle body (2) on the side close to the front axle body (1), and a limit ring (9) is movably connected to the threaded sleeve (10). A threaded ring (11) is also rotatably connected to the threaded sleeve (10), and one end of the threaded ring (11) is movably connected to one side of the limit ring (9).

3. A transmission shaft with overload protection according to claim 2, characterized in that: The limiting ring (9) is provided with a through slot adapted to the bolt (12), and the end of the bolt (12) passes through the through slot.

4. A transmission shaft with overload protection according to claim 3, characterized in that: The nut (13) is clamped between the second connection disk (4) and the limiting ring (9), and two sides of the nut (13) are respectively in contact with the second connection disk (4) and the limiting ring (9).

5. A transmission shaft with overload protection according to any one of claims 1 to 4, characterized in that: The connection holes (14) on the first connection disk (3) and the second connection disk (4) are distributed in a ring array.

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