A pneumatic sander single shaft rotor

Abstract

The utility model discloses a pneumatic sander single -shaft rotor, including rotor main shaft, the clamping portion that is equipped with one end of rotor main shaft, the other end of rotor main shaft is equipped with the mounting head, and clamping portion, rotor main shaft and mounting head are one integral structure, clamping portion surface is equipped with first threaded portion and second threaded portion respectively, the inside of clamping portion is equipped with abrasive head installation groove, and the polishing head is installed in abrasive head installation groove. The utility model has the advantages of integrated design, solves the pneumatic sander in the process of using of current, rotor and chuck are separated and then assembled together, and this design increases the complexity and time cost in the assembly process, and due to the vibration and impact in the use process, the connection between rotor and chuck can be gradually loosened, and the stability and service life of the equipment are affected.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically a single-shaft rotor for a pneumatic grinder. Background Technology

[0002] A pneumatic grinder is a tool that uses compressed air as a power source, primarily used for surface treatments such as grinding, polishing, and deburring of materials like metal, wood, and plastic. It converts the energy of compressed air into mechanical energy, driving a rotor and blades inside the grinder to rotate at high speed. This, in turn, causes the grinding head or sandpaper to rotate rapidly, thus processing the workpiece surface. The rotor, typically located in the motor section of the pneumatic grinder, is made of strong and wear-resistant materials, such as steel or special alloys. A chuck is installed at the output end of the rotor to mount and secure the grinding head.

[0003] In existing pneumatic grinders, the rotor and chuck are manufactured separately and then assembled together. This design increases the complexity and time cost of the assembly process. Moreover, due to the vibration and impact generated during use, the connection between the rotor and chuck may gradually loosen, affecting the stability and service life of the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a single-shaft rotor for a pneumatic grinder, which has the advantages of an integrated design. This solves the problem that in existing pneumatic grinders, the rotor and chuck are manufactured separately and then assembled together. This design increases the complexity and time cost of the assembly process. Moreover, due to the vibration and impact generated during use, the connection between the rotor and chuck may gradually loosen, affecting the stability and service life of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-shaft rotor for a pneumatic grinder, comprising a rotor spindle, a clamping part at one end of the rotor spindle, and a mounting head at the other end of the rotor spindle, wherein the clamping part, the rotor spindle, and the mounting head are an integral structure;

[0006] The clamping part has a first threaded part and a second threaded part on its surface, and a grinding head mounting groove is opened inside the clamping part, and the grinding head is installed in the grinding head mounting groove.

[0007] As a preferred embodiment of the single-shaft rotor of the pneumatic grinder of this utility model, a gasket groove is provided on the opposite side of the rotor spindle and the clamping part, and a gasket is installed inside the gasket groove.

[0008] As a preferred embodiment of the single-shaft rotor of the pneumatic grinder of this utility model, the rotor spindle surface is provided with a blade slot, and the blades are installed in the blade slot.

[0009] As a preferred embodiment of the single-shaft rotor of the pneumatic grinder of this utility model, the number of blade slots is several, and they are evenly distributed on the surface of the rotor main shaft.

[0010] As a preferred embodiment of the single-shaft rotor of the pneumatic grinder of this utility model, the surface of the clamping part is interference-fitted with a bearing, the surface of the first threaded part is threaded with a nut, and the bearing is located on the side opposite to the nut and the washer.

[0011] As a preferred embodiment of the single-shaft rotor of the pneumatic grinder of this utility model, the second threaded part is threadedly connected to a grinding head fixing cap, which is located outside the grinding head mounting groove to clamp and fix the grinding head.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model eliminates the risk of loosening caused by threaded, welded, or riveted connections in traditional split structures by designing the clamping part, rotor spindle, and mounting head as an integral molding structure. This significantly improves the overall stability and reliability of the rotor. The integral molding design avoids assembly errors, enhances the dynamic balance performance of the rotor, and reduces vibration during high-speed rotation, thereby improving grinding accuracy and surface treatment quality. In addition, the uniform distribution of blade slots and the setting of limiting rings ensure that the blades are firmly installed and prevent them from falling off, further ensuring operational safety. At the same time, this structure simplifies the manufacturing process, reduces the number of parts, lowers production costs and assembly complexity, and improves the overall efficiency and service life of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the results of this utility model. Figure 3 .

[0017] In the figure: 1. Rotor spindle; 2. Shim groove; 3. First threaded part; 4. Second threaded part; 5. Grinding head mounting groove; 6. Mounting head; 7. Grinding head fixing cap; 8. Nut; 9. Bearing; 10. Blade slot; 11. Shim; 12. Clamping part. Detailed Implementation

[0018] Please see Figures 1-3A single-shaft rotor for a pneumatic grinder includes a rotor spindle 1, a clamping part 12 at one end of the rotor spindle 1, and a mounting head 6 at the other end of the rotor spindle 1. The clamping part 12, the rotor spindle 1, and the mounting head 6 are an integral structure.

[0019] Furthermore, the surface of the clamping part 12 is provided with a first threaded part 3 and a second threaded part 4, and the inside of the clamping part 12 is provided with a grinding head mounting groove 5, in which the grinding head is installed.

[0020] Furthermore, a gasket groove 2 is provided on the opposite side of the rotor spindle 1 and the clamping part 12, and a gasket 11 is installed inside the gasket groove 2.

[0021] Furthermore, a blade slot 10 is provided on the surface of the rotor spindle 1, and the blades are installed in the blade slot 10.

[0022] Furthermore, there are several blade slots 10, which are evenly distributed on the surface of the rotor main shaft 1.

[0023] Furthermore, the clamping part 12 has an interference fit with a bearing 9, and the first threaded part 3 has a nut 8 threadedly fitted on its surface. The bearing 9 is located on the side opposite to the nut 8 and the washer 11.

[0024] Furthermore, the second threaded part 4 is threadedly connected to a grinding head fixing cap 7, which is located outside the grinding head mounting groove 5 to clamp and fix the grinding head.

[0025] Furthermore, the clamping part 12 and the mounting head 6 are integrated with the rotor spindle 1. The so-called "integrated molding" means that the clamping part 12 and the mounting head 6 are not connected to the rotor spindle 1 by assembly methods such as threaded, keyed, welded or riveted, but are manufactured as a whole component in one go by processes such as integral cutting, precision casting, powder metallurgy or 3D printing.

[0026] Furthermore, the clamping part 12 and the mounting head 6 are made of one of the following materials: chromium-molybdenum steel, stainless steel, titanium alloy, and nickel-based alloy.

[0027] Furthermore, a limiting ring is installed on the surface of the mounting head 6. The limiting ring limits the blade inside the blade slot 10 to prevent the blade from falling out of the blade slot 10.

[0028] During use, the gasket 11 is fitted into the gasket groove 2, and then the bearing 9 is fitted onto the surface of the clamping part 12. The clamping part 12 is then pressed onto the clamping part 12. After pressing, the nut 8 is screwed into the first threaded part 3. The bearing 9 is limited by the nut 8 and the gasket 11. The bearing 9 rotates inside the grinding part housing, allowing the rotor spindle 1 and the clamping part 12 to rotate at high speed. The blades are installed in the blade slot 10. Then, the limiting ring is fitted onto the mounting head 6 to limit the blades. After assembly, the rotor is installed inside the pneumatic grinder. After installation, the corresponding grinding head is placed into the grinding head mounting slot 5. The grinding head fixing cap 7 is screwed into the surface of the second threaded part 4 to clamp and fix the grinding head. During operation, compressed air enters the grinding part through the guide structure and drives the blades and the rotor spindle 1 to rotate at high speed. The rotor spindle 1 drives the clamping part 12 and the grinding head to rotate synchronously, allowing the operator to grind the surface of the workpiece through the grinding head.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-shaft rotor for a pneumatic grinder, comprising a rotor spindle (1), characterized in that: The rotor spindle (1) has a clamping part (12) at one end and a mounting head (6) at the other end. The clamping part (12), the rotor spindle (1) and the mounting head (6) are an integral structure. The clamping part (12) has a first threaded part (3) and a second threaded part (4) on its surface. The clamping part (12) has a grinding head mounting groove (5) inside, and the grinding head is installed in the grinding head mounting groove (5).

2. A single-shaft rotor for a pneumatic grinder according to claim 1, characterized in that: The rotor spindle (1) and the clamping part (12) are provided with a gasket groove (2) on opposite sides, and a gasket (11) is installed inside the gasket groove (2).

3. A single-shaft rotor for a pneumatic grinder according to claim 1, characterized in that: The rotor spindle (1) has a blade slot (10) on its surface, and the blades are installed in the blade slot (10).

4. A single-shaft rotor for a pneumatic grinder according to claim 3, characterized in that: The number of blade slots (10) is several, and they are evenly distributed on the surface of the rotor main shaft (1).

5. A single-shaft rotor for a pneumatic grinder according to claim 2, characterized in that: The clamping part (12) has an interference fit with a bearing (9), and the first threaded part (3) has a nut (8) threaded on its surface. The bearing (9) is located on the side opposite to the nut (8) and the washer (11).

6. A single-shaft rotor for a pneumatic grinder according to claim 1, characterized in that: The second threaded part (4) is threaded with a grinding head fixing cap (7), which is located outside the grinding head mounting groove (5) to clamp and fix the grinding head.

Images