Main shaft with high stability

Abstract

The utility model discloses a main shaft with high stability, which relates to the technical field of main shafts and comprises a main shaft, positioning devices and two belt wheels, and the two belt wheels are fixedly mounted on the main shaft through the positioning devices respectively. The positioning device comprises two rigid sector ring bodies, two elastic damping assemblies and a key block, the two rigid sector ring bodies and the two elastic damping assemblies are spliced into a cylinder structure at intervals in the circumferential direction of the rigid sector ring bodies, and the two elastic damping assemblies are both in pressing fit with the main shaft and the belt wheel; a through groove is formed in one rigid sector ring body in a radial penetrating mode, the main shaft horizontally and fixedly penetrates through the interior of the axis of the positioning device, and the main shaft is in key connection with the belt wheel through a key block. In an assembling state, the arc-shaped cushion block and the round cushion block are both in pressing fit with the main shaft and the belt wheel, so that the friction damping stabilizing effect is achieved, meanwhile, a certain elastic compensation effect is achieved, and linkage and combination stability of the belt wheel and the main shaft are achieved through the key connection effect of the key block.

Description

Technical Field

[0001] This utility model relates to the field of spindle technology, specifically to a spindle with high stability. Background Technology

[0002] In mechanical structures, belt drive is a common transmission structure, which includes a belt and pulleys mounted on the motor shaft and main shaft. In traditional belt drive structures, the pulleys are directly mounted on the main shaft.

[0003] The pulleys on the spindle are fixed and secured by a keyed pin structure to prevent slippage. For example, a spindle structure disclosed in Chinese patent document (CN204592042U) includes a spindle, a pulley, and a pulley tapered sleeve disposed between the spindle and the pulley. The pulley tapered sleeve is keyed to the spindle and bolted to the pulley. However, this structure requires not only a stable connection between the pulley and the tapered sleeve but also precise fit between the tapered sleeve and the spindle. If either of these components becomes loose or the fit is not tight, relative movement may occur between the pulley and the spindle, thereby affecting the accuracy of the transmission. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a highly stable spindle, which improves the stability of the connection between the pulley and the spindle and ensures the linkage between the pulley and the spindle.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A highly stable spindle includes a spindle, positioning devices, and pulleys. Two positioning devices are respectively provided on the outer sides of the left and right ends of the spindle, and two pulleys are respectively fixedly installed on the spindle through the positioning devices.

[0007] The positioning device includes two rigid fan rings, two elastic damping components and a key block. The two rigid fan rings and the two elastic damping components are spliced ​​together at intervals along the circumferential direction of the rigid fan rings to form a cylindrical structure. Both elastic damping components are pressed and fitted with the main shaft and the pulley.

[0008] One of the rigid fan rings has a through groove running radially through it. The main shaft is horizontally fixed inside the shaft of the positioning device. The main shaft has a first keyway that matches the key block at the position corresponding to the through groove. The wheel has a second keyway that matches the key block at the position corresponding to the through groove. The key block passes through the through groove and is connected to the second keyway of the pulley and the first keyway of the main shaft.

[0009] Preferably, two pulleys are provided on the outer sides of the two positioning devices, and each pulley includes a pressure ring and a disc body, with the disc body installed inside the pressure ring.

[0010] Preferably, the pressure ring and the wheel body are an integral structure, and the pressure ring and the wheel body are coaxial.

[0011] Preferably, the main shaft is horizontally fixed inside the shaft of the positioning device.

[0012] Preferably, the positioning device and the pulley are on the same vertical plane.

[0013] Preferably, the arc-shaped pad has a flat, curved surface in the shape of a tile.

[0014] Preferably, the circular pad is solid with an arc-shaped bottom surface that is hemispherical.

[0015] Preferably, two roller bearings are respectively provided on the outer sides of the left and right ends of the main shaft, and the two roller bearings are respectively installed on the two inner sides of the positioning device and centered based on the symmetry of the main shaft.

[0016] Preferably, a base is provided on the outer side of the middle section of the spindle, and the outer side of the spindle horizontally penetrates the interior of the base, with the outer surface of the spindle and the inner groove surface of the base being fitted with a clearance.

[0017] Preferably, the elastic damping component consists of two arc-shaped pads and one round pad. The round pad and the two arc-shaped pads are arranged along the axial direction of the rigid fan ring body, and the round pad is located in the middle of the two arc-shaped pads. The arc-shaped pads and the round pad are respectively glued to the rigid fan ring body and are interference fit.

[0018] This invention provides a spindle with high stability, which has the following advantages:

[0019] This highly stable spindle is first assembled on a machine tool. Then, the machine tool's motor shaft drives the transmission belt to rotate the pulley, enabling the pulley to achieve power output. The pulley is connected to the spindle by a key block of the positioning device and two elastic damping components, which enhances the stability of the connection between the pulley and the spindle, ensuring linkage and preventing relative movement, thus achieving anti-slipping and anti-deviation operation of the pulley. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the positioning device and pulley of this utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional exploded structure of the positioning device of this utility model.

[0023] In the diagram: 1. Main shaft; 2. Positioning device; 3. Pulley; 4. Roller bearing; 5. Base; 21. Arc-shaped pad; 22. Round pad; 23. Rigid fan ring body; 24. Key block; 25. Through groove; 31. Pressure belt ring; 32. Wheel disc body. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-3 This utility model provides a highly stable spindle, including a spindle 1, a positioning device 2, and pulleys 3. Two positioning devices 2 are respectively provided on the outer sides of the left and right ends of the spindle 1, and two pulleys 3 are respectively fixedly installed on the spindle 1 through the positioning devices 2.

[0026] The pulley 3 includes a pressure ring 31 and a disc body 32. The disc body 32 is installed inside the pressure ring 31. The pressure ring 31 and the disc body 32 are an integral structure, and the pressure ring 31 and the disc body 32 are coaxial.

[0027] In this embodiment, the positioning device 2 includes two rigid fan rings 23, two elastic damping components, and a key block 24. The two rigid fan rings 23 and the two elastic damping components are spliced ​​together at intervals along the circumferential direction of the rigid fan rings 23 to form a cylindrical structure. One of the rigid fan rings 23 has a through groove 25 radially through it. The main shaft 1 is horizontally fixed through the interior of the axis of the positioning device 2. The main shaft 1 has a first keyway that matches the key block 24 at the position corresponding to the through groove 25. The wheel body 32 has a second keyway that matches the key block 24 at the position corresponding to the through groove 25. The key block 24 passes through the through groove 25 and is keyed to the second keyway of the pulley 3 and the first keyway of the main shaft 1. The positioning device 2 and the pulley 3 are on the same vertical plane.

[0028] The elastic damping assembly in this embodiment consists of two arc-shaped pads 21 and one round pad 22. The round pad 22 and the two arc-shaped pads 21 are arranged axially along the rigid fan ring body 23, with the round pad 22 located between the two arc-shaped pads 21. The arc-shaped pads 21 and the round pads 22 are glued to the rigid fan ring body 23 and are interference-fitted. Since both the arc-shaped pads 21 and the round pads 22 have damping and elastic characteristics, in the assembled state, the arc-shaped pads 21 and the round pads 22 are pressed together with the main shaft 1 and the pulley 3 to have a stable friction damping effect, and at the same time, they also have a certain elastic compensation effect. Together with the key connection of the key block 24, they jointly realize the linkage and connection stability between the pulley 3 and the main shaft 1.

[0029] The rigid fan ring 23 is made of rigid metal. The arc-shaped pad 21 is a flat, curved surface in the shape of a tile. The arc-shaped pad 21 is made of rubber with a rough friction surface and high elasticity, which facilitates the arc surface of the arc-shaped pad 21 to wrap around the left and right ends of the main shaft 1 and stabilize the damping positioning of the pulley 3. The round pad 22 is a solid, hemispherical pad with an arc bottom surface. The round pad 22 is made of rubber with a rough friction surface and high elasticity, which facilitates the spherical pad of the round pad 22 to support the left and right ends of the main shaft 1 and stabilize the damping positioning of the pulley 3.

[0030] Two roller bearings 4 are respectively provided on the outer sides of the left and right ends of the main shaft 1. The two roller bearings 4 are respectively installed on the two inner sides of the positioning device 2, which are symmetrical about the main shaft 1. A base 5 is provided on the outer side of the middle section of the main shaft 1. The outer side of the main shaft 1 horizontally penetrates the interior of the base 5. The outer surface of the main shaft 1 and the inner groove surface of the base 5 are fitted with clearance.

[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A spindle with high stability, characterized in that: It includes a main shaft, positioning devices, and pulleys. Two positioning devices are respectively provided on the outer sides of the left and right ends of the main shaft. The two pulleys are fixedly installed on the main shaft through the positioning devices. The pulleys include a pressure ring and a wheel disc body. The wheel disc body is installed inside the pressure ring. The positioning device includes two rigid fan rings, two elastic damping components and a key block. The two rigid fan rings and the two elastic damping components are spliced ​​together at intervals along the circumferential direction of the rigid fan rings to form a cylindrical structure. Both elastic damping components are pressed and fitted with the main shaft and the pulley. One of the rigid fan rings has a through groove running radially through it. The main shaft is horizontally fixed inside the shaft of the positioning device. The main shaft has a first keyway that matches the key block at the position corresponding to the through groove. The wheel has a second keyway that matches the key block at the position corresponding to the through groove. The key block passes through the through groove and is connected to the second keyway of the pulley and the first keyway of the main shaft.

2. The high-stability spindle according to claim 1, characterized in that: The pressure ring and the wheel body are an integral structure, and the pressure ring and the wheel body are collinear.

3. A high-stability spindle according to claim 1, characterized in that: The main shaft is horizontally fixed inside the center of the positioning device.

4. A high-stability spindle according to claim 1, characterized in that: The positioning device and the pulley are on the same vertical plane.

5. A high-stability spindle according to claim 1, characterized in that: Two roller bearings are respectively provided on the outer sides of the left and right ends of the main shaft. The two roller bearings are respectively installed on the two inner sides of the positioning device and centered based on the symmetry of the main shaft.

6. A high-stability spindle according to claim 5, characterized in that: A base is provided on the outer side of the middle section of the main shaft, and the outer side of the main shaft horizontally penetrates the interior of the base. The outer surface of the main shaft and the inner groove surface of the base are fitted with clearance.

7. A high-stability spindle according to claim 1, characterized in that: The elastic damping assembly consists of two arc-shaped pads and one round pad. The round pad and the two arc-shaped pads are arranged along the axial direction of the rigid fan ring body, with the round pad located between the two arc-shaped pads. The arc-shaped pads and the round pad are glued to the rigid fan ring body and are interference fit.

8. A high-stability spindle according to claim 7, characterized in that: The arc-shaped pad has a flat, curved surface in the shape of a tile.

9. A high-stability spindle according to claim 7, characterized in that: The circular pad is solid with an arc-shaped bottom and is hemispherical.

Images