Connecting structure of impeller or cutter wheel and power main shaft

Abstract

The utility model relates to a connecting structure of an impeller or a cutter wheel and a power main shaft, which comprises a power device and the impeller or the cutter wheel, an output end of the power device is fixed on a flange plate, a shaft hole is arranged on the flange plate, a shaft sleeve is pivoted at the position of the shaft hole of the flange plate through a bearing, and one end of the shaft sleeve is coaxially connected with a main shaft of the power device. The impeller or the cutter wheel is fixedly connected to the other end of the shaft sleeve; the shaft sleeve is additionally arranged between the main shaft and the impeller or the cutter wheel of the power device, the shaft sleeve is pivoted on the flange plate, and the impeller or the cutter wheel and the main shaft are connected at the two ends of the shaft sleeve, so that the impeller or the cutter wheel and the main shaft are isolated through the shaft sleeve, and radial acting force generated when the impeller or the cutter wheel rotates at a high speed cannot be transmitted to the main shaft. The shaft sleeve has larger size and strength, can better bear impact force driven by uneven dynamic balance, and has the advantages of being reasonable in structure and good in reliability.

Description

Technical Field

[0001] The utility model relates to a shaft connection structure, in particular to a connection structure between an impeller or a cutter wheel and a power main shaft. Background Art

[0002] At present, in machinery and equipment with a cutter wheel or an impeller, the cutter wheel and the impeller are usually directly fixed to the end of the main shaft of an internal combustion engine or a motor. For example, a shredder has several cutters symmetrically distributed on the cutter wheel. When cutting materials, the cutter wheel is driven by an electric motor or an internal combustion engine to rotate at a high speed. Each cutter cooperates with the feeding port when rotating to the feeding port to complete shearing. In this shearing method, the cutter wheel is often stressed only locally or on one side, which will cause uneven dynamic balance when the cutter wheel rotates at a high speed. When rotating at a high speed, in addition to the torque, the main shaft will also be subjected to other directional forces, such as radial forces. Since one end of the main shaft is suspended, the radial force can easily bend the main shaft. To ensure the strength of the main shaft, it is necessary to increase the size of the main shaft to ensure the strength. The size of the main shaft of the power device is limited by power and volume, and the diameter of the main shaft cannot be very thick. Non-standard customized products will greatly increase the cost of the product. This causes the existing impeller or cutter wheel and the power main shaft to be easily bent and damaged due to uneven dynamic balance caused by the suspension of one end of the main shaft, affecting the service life of the product. Content of the Utility Model

[0003] The purpose of the utility model is to provide a connection structure between an impeller or a cutter wheel and a power main shaft. A shaft sleeve is added between the main shaft of the power device and the impeller or the cutter wheel. The shaft sleeve is pivotally connected to the flange plate. The impeller or the cutter wheel and the main shaft are connected to both ends of the shaft sleeve. The utility model isolates the impeller or the cutter wheel from the main shaft through the shaft sleeve, so that the radial force generated when the impeller or the cutter wheel rotates at a high speed will not be transmitted to the main shaft. The shaft sleeve has a larger size and strength and can better withstand the impact force caused by uneven dynamic balance, and has the characteristics of reasonable structure and good reliability.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A connection structure between an impeller or a cutter wheel and a power main shaft, including a power device and an impeller or a cutter wheel, characterized in that: the output end of the power device is fixed to a flange plate, a shaft hole is opened on the flange plate, and a shaft sleeve is pivotally connected to the shaft hole of the flange plate through a bearing. One end of the shaft sleeve is coaxially connected to the main shaft of the power device, and the impeller or the cutter wheel is fixedly connected to the other end of the shaft sleeve.

[0006] The cutter wheel is accommodated inside the box body, the flange plate is fixedly connected to the box body, and a through hole is opened on the side plate of the box body close to the power device.

[0007] A connection seat is arranged around the main shaft at the output end of the power device, and the flange plate is fixed on the connection seat.

[0008] The described flange is provided with a bearing mounting hole at one end of the shaft hole. The bearing is sleeved on the shaft sleeve and installed in the bearing mounting hole. A gasket and a snap ring coaxial with the bearing are also provided at the port of the bearing mounting hole.

[0009] A connecting flange is provided at one end of the shaft sleeve away from the main shaft. The cutter wheel is fixedly connected to the end of the shaft sleeve through the connecting flange.

[0010] The utility model connects the main shaft and the impeller or the cutter wheel through the flange and the shaft sleeve. When the impeller or the cutter wheel rotates at a high speed, due to the dynamic balance, the radial force generated evenly is transmitted to the shaft sleeve. By using a shaft sleeve with a larger size and higher strength, it has sufficient strength to resist the forces in all directions generated by the impeller or the cutter wheel. At the same time, the shaft sleeve is supported by bearings and flanges, and itself has stronger torsional and bending resistance. During operation, the main shaft is mainly subjected to the reaction force generated by the output torque, thus well solving the problem that the existing structure is prone to cause bending damage of the main shaft, and having the characteristics of reasonable structure and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the utility model;

[0012] Figure 2 is a schematic internal structure diagram of the utility model;

[0013] Figure 3 is a schematic structural diagram (I) of the shaft sleeve and the flange of the utility model;

[0014] Figure 4 is a schematic structural diagram (II) of the shaft sleeve and the flange of the utility model;

[0015] Figure 5 is a schematic internal structure diagram of the utility model accommodated in the box body;

[0016] Figure 6 is a schematic exploded structure diagram of the utility model accommodated in the box body;

[0017] Figure 7 is a schematic structural diagram of the power device of the utility model;

[0018] Figure 8 is a schematic structural diagram of the cutter wheel and the box body of the utility model;

[0019] Figure 9 is a schematic structural diagram of the shaft sleeve and the box body of the utility model. DETAILED DESCRIPTION OF THE INVENTION

[0020] As Figures 1-9As shown in the figure, a connection structure between an impeller or cutter wheel and a power main shaft includes a power device 1 and an impeller or cutter wheel 2. A connection seat 12 is arranged around the main shaft 11 at the output end of the power device 1, and a flange plate 3 is fixed on the connection seat 12. A shaft hole 31 is formed in the flange plate 3, and a shaft sleeve 4 is pivotally connected to the shaft hole of the flange plate 3 through a bearing 5. The flange plate 3 is provided with a bearing mounting hole 32 at one end of the shaft hole. The bearing 5 is sleeved on the shaft sleeve 4 and installed in the bearing mounting hole 32. A gasket 51 and a snap ring 52 coaxial with the bearing 5 are further provided at the port of the bearing mounting hole 32. The snap ring 52 axially positions the bearing 5 through the gasket 51. One end of the shaft sleeve 4 is coaxially connected to the main shaft 11 of the power device. A connection flange 41 is arranged at the other end of the shaft sleeve 4 away from the main shaft. The cutter wheel 2 is fixedly connected to the end of the shaft sleeve 4 through the connection flange 41.

[0021] In this embodiment, the cutter wheel 2 is accommodated inside the box body 6 of the shredder, the flange plate 3 is fixedly connected to the box body 6, and a through hole is formed in the box body 6 corresponding to the position of the shaft hole.

[0022] When the utility model works, branches and foliage enter the box body through the feeding hopper. The cutting edge of the cutter wheel 2 cooperates with the edge of the feeding port to cut and crush the materials. The cut materials enter the other side of the cutter wheel and are driven by the impeller on the other side of the cutter wheel 2 to generate centrifugal force, and finally are ejected from the discharge port. During cutting, only the side of the cutter wheel 2 corresponding to the feeding port is stressed. Therefore, there is a problem of uneven dynamic balance in the overall cutter wheel. The high-speed rotation of the cutter wheel will generate a radial force on the shaft sleeve, and the radial force is offset by the bearing and the flange plate through the shaft sleeve. Most of the forces will not be transmitted to the main shaft 11. In this way, when working, the main shaft is mainly subjected to the reaction force generated by the output torque, thus well solving the problem that the existing structure is easy to cause the main shaft to bend and be damaged, and having the characteristics of reasonable structure and good reliability.

Claims

1. A connection structure between an impeller or a cutter wheel and a power main shaft, comprising a power device (1) and an impeller or a cutter wheel (2), characterized in that: The output end of the power device (1) is fixed to a flange (3), an axial hole (31) is formed on the flange (3), a shaft sleeve (4) is pivotally connected to the axial hole of the flange (3) through a bearing (5), one end of the shaft sleeve (4) is coaxially connected to the main shaft (11) of the power device, and the impeller or cutter wheel (2) is fixedly connected to the other end of the shaft sleeve (4).

2. The connection structure of an impeller or a cutter wheel and a power main shaft according to claim 1, characterized in that: The cutter wheel (2) is accommodated in the box body (6), the flange (3) is fixedly connected to the box body (6), and a through hole is provided in the box body (6) at a position corresponding to the shaft hole.

3. The connection structure of an impeller or a cutter wheel and a power main shaft according to claim 1, characterized in that: A connecting seat (12) is arranged around the main shaft at the output end of the power device (1), and the flange (3) is fixed on the connecting seat (12).

4. The connection structure of an impeller or a cutter wheel and a power main shaft according to claim 1, characterized in that: The flange (3) is provided with a bearing mounting hole (32) at one end of the shaft hole, the bearing (5) is sleeved on the shaft sleeve (4) and mounted in the bearing mounting hole (32), and a gasket (51) and a retaining ring (52) coaxial with the bearing are also provided at the end of the bearing mounting hole (32).

5. The connection structure of an impeller or a cutter wheel and a power main shaft according to claim 4, characterized in that: A connecting flange (41) is provided at one end of the shaft sleeve (4) away from the main shaft, and the cutter wheel (2) is fixedly connected to the end of the shaft sleeve (4) via the connecting flange (41).

Images