Handheld belt sander

Abstract

The utility model discloses a handheld belt sander which comprises a holding rod, one end of the holding rod is connected with a power wheel through a power device, the side wall of the holding rod is connected with a horizontally-arranged mounting plate through a spring supporting device, and the upper side of the mounting plate is fixedly connected with a vertically-arranged fixing plate. A vertically-arranged limiting rail is arranged on the side wall of the fixing plate, a lifting rod penetrates through the limiting rail and is connected into the limiting rail in an up-down sliding mode, a threaded rod is connected to the side wall of the lifting rod in a threaded and penetrating mode, and the bottom end of the threaded rod is rotationally connected to the upper side of the mounting plate. According to the device, the power wheel, the guide wheel, the abrasive belt, the extrusion spring, the fixing cylinder, the supporting rod and other components are arranged, the arc-shaped surface of a workpiece can be effectively polished, the abrasive belt can be manually and rapidly switched, and convenience is high.

Description

Technical Field

[0001] This utility model relates to the field of belt sander technology, and in particular to a handheld belt sander. Background Technology

[0002] The working principle of a handheld belt sander is similar to that of a benchtop belt sander, both based on the grinding characteristics of the belt. When the belt is driven to rotate by the motor, the operator holds the device and presses the belt firmly against the material to be processed. Through friction, a layer on the surface of the material is removed, achieving the effects of grinding and polishing.

[0003] The existing handheld belt sander structure generally consists of three parts: an outer shell, a power unit, and a belt sanding head. This structure can effectively sand conventional small products. However, the existing belt sander is generally a straight structure, so it can only bear force on a plane and is difficult to sand curved surfaces. Utility Model Content

[0004] This invention provides a handheld belt sander to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A handheld belt sander includes a handle, one end of which is connected to a drive wheel via a power device. A horizontally mounted plate is connected to the side wall of the handle via a spring support device. A vertically mounted fixing plate is fixedly connected to the upper side of the mounting plate. A vertically mounted limit track is provided on the side wall of the fixing plate. A lifting rod passes through the limit track and slides up and down within the limit track. A threaded rod is threaded through the side wall of the lifting rod. The bottom end of the threaded rod is rotatably connected to the upper side of the mounting plate, and a rotating plate is fixedly connected to the upper end of the threaded rod. A guide wheel is rotatably connected to one end of the lifting rod. A sanding belt is fitted onto the guide wheel and the drive wheel.

[0007] Preferably, the power unit includes a mounting groove, which is formed on one end side wall of the grip, and a drive motor is fixedly connected inside the mounting groove. The power wheel is fixedly connected to the output shaft of the drive motor.

[0008] Preferably, the spring support device includes a fixed cylinder, which is fixedly connected to the bottom side wall of the mounting plate. A support rod is slidably connected inside the fixed cylinder. A compression spring is fixedly connected between the bottom side wall of the fixed cylinder and the upper end of the support rod. The bottom end of the support rod is fixedly connected to the side wall of the grip.

[0009] Preferably, the surfaces of the drive wheel and the guide wheel are provided with anti-slip textures.

[0010] Preferably, the drive wheel and the guide wheel are rubber wheels.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This device, with its components including a power wheel, guide wheel, sanding belt, compression spring, fixed cylinder, and support rod, can not only effectively grind the curved surface of the workpiece, but also allows for quick and manual switching of the sanding belt, making it highly convenient.

[0013] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the rear structure of a handheld belt sander proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the front structure of a handheld belt sander proposed in this utility model.

[0017] Figure 3 This is a front view cross-sectional structural diagram of a handheld belt sander proposed in this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Handle; 2. Mounting slot; 3. Drive motor; 4. Power wheel; 5. Guide wheel; 6. Sanding belt; 7. Fixing plate; 8. Limiting rail; 9. Rotating plate; 10. Threaded rod; 11. Lifting rod; 12. Mounting plate; 13. Compression spring; 14. Fixing cylinder; 15. Support rod. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described in more detail below by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0021] Please see Figures 1-3In this embodiment of the utility model, a handheld belt sander includes a handle 1, one end of which is connected to a power wheel 4 via a power device. The power device includes a mounting groove 2, which is formed on the side wall of one end of the handle 1. A drive motor 3 is fixedly connected inside the mounting groove 2, and the power wheel 4 is fixedly connected to the output shaft of the drive motor 3.

[0022] The side wall of the grip 1 is connected to a horizontally arranged mounting plate 12 via a spring support device. The spring support device includes a fixed cylinder 14, which is fixedly connected to the bottom side wall of the mounting plate 12. A support rod 15 is slidably connected inside the fixed cylinder 14. A compression spring 13 is fixedly connected between the bottom side wall of the fixed cylinder 14 and the upper end of the support rod 15. The bottom end of the support rod 15 is fixedly connected to the side wall of the grip 1. The guide wheel 5 and the power wheel 4 are elastically supported by the compression spring 13. When the power wheel 4 is impacted, the power wheel 4 can transmit the force to the compression spring 13 inside the fixed cylinder 14 through the support rod 15, which can effectively reduce the impact on the power wheel 4.

[0023] A vertically mounted fixing plate 7 is fixedly connected to the upper side of the mounting plate 12. A vertically mounted limiting track groove 8 is provided on the side wall of the fixing plate 7. A lifting rod 11 passes through the limiting track groove 8. The diameter of the lifting rod 11 is the same as the width of the limiting track groove 8. The lifting rod 11 slides up and down in the limiting track groove 8. A threaded rod 10 is threaded through the side wall of the lifting rod 11. The bottom end of the threaded rod 10 is rotatably connected to the upper side of the mounting plate 12 through a bearing. A rotating plate 9 is fixedly connected to the upper end of the threaded rod 10. A guide wheel 5 is rotatably connected to one end of the lifting rod 11 through a bearing. A sanding belt 6 is fitted on the guide wheel 5 and the power wheel 4. The power wheel 4 and the guide wheel 5 are rubber wheels. The surfaces of the power wheel 4 and the guide wheel 5 are provided with anti-slip textures, which can increase the friction between the power wheel 4 and the guide wheel 5 and the sanding belt 6 and prevent the sanding belt 6 from slipping.

[0024] The working principle of this utility model is as follows:

[0025] In use, the drive motor 3 can be started first, which drives the power wheel 4 to rotate. The power wheel 4 then drives the sanding belt 6 to rotate quickly. The power wheel 4 is the grinding contact wheel. Then, the handle 1 can be gripped so that the sanding belt 6 on the arc-shaped side wall of the power wheel 4 is close to the arc-shaped surface to be ground. Then, the downward pressure is increased to quickly grind the arc-shaped surface. The guide wheel 5 and the power wheel 4 are elastically supported by the compression spring 13, which can effectively reduce the impact on the power wheel 4 during the grinding process and improve the service life of the equipment. In addition, the space between the guide wheel 5 and the power wheel 4 can quickly reduce the surface temperature of the sanding belt 6 and increase the life of the sanding belt 6.

[0026] When the sanding belt 6 needs to be replaced, the rotating plate 9 can be grasped to drive the threaded rod 10 to rotate in both directions. The rotation of the threaded rod 10 in both directions can drive the lifting rod 11 to rise and fall, thereby driving the guide wheel 5 to move closer to or away from the power wheel 4. When the guide wheel 5 is closer to the power wheel 4, it is easier to quickly replace the sanding belt 6. When the guide wheel 5 is closer to the power wheel 4, it can increase the tension of the sanding belt 6.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A handheld belt sander, comprising a handle (1), characterized in that, One end of the grip (1) is connected to a power wheel (4) via a power device. The side wall of the grip (1) is connected to a horizontally arranged mounting plate (12) via a spring support device. A vertically arranged fixing plate (7) is fixedly connected to the upper side of the mounting plate (12). A vertically arranged limit track (8) is provided on the side wall of the fixing plate (7). A lifting rod (11) passes through the limit track (8). The lifting rod (11) slides up and down within the limit track (8). A threaded rod (10) is threaded through the side wall of the lifting rod (11). The bottom end of the threaded rod (10) is rotatably connected to the upper side of the mounting plate (12). A rotating plate (9) is fixedly connected to the upper end of the threaded rod (10). A guide wheel (5) is rotatably connected to one end of the lifting rod (11). A sanding belt (6) is fitted on the guide wheel (5) and the power wheel (4).

2. The handheld belt sander according to claim 1, characterized in that, The power unit includes a mounting groove (2), which is opened on one side wall of the handle (1). A drive motor (3) is fixedly connected inside the mounting groove (2), and the power wheel (4) is fixedly connected to the output shaft of the drive motor (3).

3. A handheld belt sander according to claim 2, characterized in that, The spring support device includes a fixed cylinder (14), which is fixedly connected to the bottom side wall of the mounting plate (12). A support rod (15) is slidably connected inside the fixed cylinder (14). A compression spring (13) is fixedly connected between the bottom side wall of the fixed cylinder (14) and the upper end of the support rod (15). The bottom end of the support rod (15) is fixedly connected to the side wall of the grip (1).

4. A handheld belt sander according to claim 3, characterized in that, The surfaces of the power wheel (4) and the guide wheel (5) are provided with anti-slip texture.

5. A handheld belt sander according to claim 4, characterized in that, The power wheel (4) and guide wheel (5) are rubber wheels.

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