A belt sander wheel rotation adjusting mechanism

Abstract

The utility model discloses technical field of polishing abrasive belt machine, a kind of abrasive belt machine grinding wheel rotation adjusting mechanism, including mainframe and grinding wheel support, mainframe is fixedly installed on external abrasive belt machine by pin shaft, the inboard of mainframe is installed with support shaft, grinding wheel support is at least equipped with two, the inboard of grinding wheel support is rotatably installed with grinding wheel roller, the side wall of mainframe is installed with fixed sheet, the outer side wall of fixed sheet is provided with angle scale line, the side wall of grinding wheel support is all provided with indicating slot, the device is rotatable by setting at least two grinding wheel supports, so that external abrasive belt can be connected in different grinding wheel roller outside, form multiple-wheel collaborative guidance structure, adapt to complex curved surface polishing, while annular fixed sheet is concentric with support shaft, and outer side wall is equipped with angle scale line, indicating slot on grinding wheel support cooperates with scale line, realize visual angle adjustment, operator can intuitively read the rotation angle of grinding wheel support, accurately control polishing angle, improve polishing precision.

Description

Technical Field

[0001] This utility model relates to the field of belt sander technology, specifically a belt sander grinding wheel rotation adjustment mechanism. Background Technology

[0002] In the belt sanding process, the grinding wheel is a key component of the belt sander. Its performance and structure directly affect the sanding effect and work efficiency. Traditional grinding wheels have a fixed structure and the grinding wheel angle is difficult to adjust flexibly, which cannot meet the sanding needs of workpieces with different shapes and angles. The rotating mechanism of the belt sander and the belt sander disclosed in CN210255566U are described. By rotating the rotating frame to different work positions and then locking the rotating frame onto the support of the belt sander with a locking nut and external thread, the sanding and polishing operations of different workpieces can be met without changing the belt sander or different sanding wheels, thus reducing production costs and enabling the belt sander to meet the sanding requirements of more workpieces, greatly improving the flexibility and versatility of the belt sander. However, in the aforementioned documents, the rotation angle of the rotating frame is difficult to adjust precisely, resulting in poor contact between the sanding belt and the workpiece, which can easily lead to uneven grinding and excessive wear of the sanding belt. Summary of the Invention

[0003] The purpose of this utility model is to provide a grinding wheel rotation adjustment mechanism for a belt sander, so as to solve the problem mentioned in the background art that the rotation angle of the existing rotating frame is difficult to adjust accurately, resulting in poor contact between the sanding belt and the workpiece, and easy to cause uneven grinding and excessive wear of the sanding belt.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grinding wheel rotation adjustment mechanism for a belt sander, comprising a main frame and a grinding wheel bracket. The main frame is fixedly mounted on an external belt sander via a pin. A support shaft is mounted on the inner side of the main frame. At least two grinding wheel brackets are provided, each sleeved on the outer side of the support shaft and capable of rotating on the outer side of the support shaft. A grinding wheel roller is rotatably mounted on the inner side of the grinding wheel bracket, and an external sanding belt can be sleeved on the outer side of the grinding wheel roller. The main frame has a fixing plate installed on its side wall. The fixing plate is ring-shaped and is concentric with the support shaft. An angle scale line is provided on the outer side wall of the fixing plate. The side wall of the grinding wheel bracket is provided with an indicator groove.

[0005] As a preferred embodiment of this utility model, the two ends of the support shaft respectively penetrate the left and right side walls of the main frame. Threaded holes are provided at the ends of both ends of the support shaft, and the threads of the two threaded holes are in opposite directions. Locking screws are screwed into both threaded holes. Locking pressure plates are fixedly installed on the outer side of the locking screws. The locking pressure plates can support the main frame and clamp and fix the grinding wheel bracket through the main frame. An adjustment handle is installed at the end of the locking screw away from the threaded hole.

[0006] As a preferred embodiment of this utility model, the grinding wheel support includes a sun wheel support, a small grinding wheel support, and a large grinding wheel support. The sun wheel support, the small grinding wheel support, and the large grinding wheel support are all sleeved on the outside of the support shaft in the main frame. The grinding wheel roller includes a sun wheel, a small grinding wheel, and a large grinding wheel. The sun wheel, the small grinding wheel, and the large grinding wheel are respectively rotatably installed on the inside of the sun wheel support, the small grinding wheel support, and the large grinding wheel support.

[0007] As a preferred embodiment of this utility model, it also includes a vertical grinding plate, wherein the upper and lower ends of the side wall of the vertical grinding plate are provided with slots, and the inner sides of the small grinding wheel bracket and the large grinding wheel bracket are each provided with a fixing rod, and the two ends of the vertical grinding plate are respectively mounted on the two fixing rods through the slots.

[0008] As a preferred embodiment of this utility model, gaskets are fitted on both sides of the support shaft, and the gaskets are disposed between the sun gear bracket, the small grinding wheel bracket and the large grinding wheel bracket.

[0009] As a preferred embodiment of this invention, the gasket is made of metal.

[0010] As a preferred embodiment of this utility model, a bushing is fitted onto the middle of the outer wall of the support shaft, and the two ends of the grinding wheel bracket are respectively disposed on the left and right sides of the bushing, and the bushing can support the inner side of the grinding wheel bracket. Compared with the prior art, the beneficial effects of this utility model are: This device, by setting at least two rotatable grinding wheel supports, allows the external sanding belt to be fitted onto the outside of different grinding wheel rollers, forming a multi-wheel collaborative guiding structure. Each grinding wheel support can independently adjust its angle according to the grinding requirements, adapting to the grinding of complex curved surfaces, effectively balancing the tension of the sanding belt, and avoiding sanding belt slippage or uneven wear. Meanwhile, the annular fixing plate is concentrically set with the support shaft, and the outer wall is provided with angle scale lines. The indicator groove on the grinding wheel bracket cooperates with the scale lines to realize visual angle adjustment. The operator can intuitively read the rotation angle of the grinding wheel bracket, accurately control the grinding angle, and improve the grinding accuracy. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this patent; Figure 2This is a schematic diagram of the vertical grinding plate mounting structure of this patent; Figure 3 This is a schematic diagram of the support shaft structure of this patent; Figure 4 This is a schematic diagram of the cross-sectional structure of the support shaft of this patent.

[0012] In the diagram: 1 Main frame, 2 Grinding wheel bracket, 21 Sun wheel bracket, 22 Small grinding wheel bracket, 23 Large grinding wheel bracket, 3 Support shaft, 4 Grinding wheel roller, 41 Sun wheel, 42 Small grinding wheel, 43 Large grinding wheel, 5 Fixing plate, 6 Angle scale line, 7 Indicator groove, 8 Threaded hole, 9 Locking bolt, 10 Locking pressure plate, 11 Adjusting handle, 12 Vertical grinding plate, 13 Slot, 14 Fixing rod, 15 Shim, 16 Shaft sleeve. Detailed Implementation

[0013] 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.

[0014] Please see Figure 1-4 This utility model provides a technical solution: In this technical solution, a grinding wheel rotation adjustment mechanism for a belt sander includes a main frame 1 and a grinding wheel bracket 2. The main frame 1 is fixedly installed on an external belt sander by a pin. A support shaft 3 is installed on the inner side of the main frame 1. At least two grinding wheel brackets 2 are provided, each sleeved on the outer side of the support shaft 3 and can rotate on the outer side of the support shaft 3. A grinding wheel roller 4 is rotatably installed on the inner side of the grinding wheel bracket 2, and the external sanding belt can be sleeved on the outer side of the grinding wheel roller 4. The main frame 1 serves as the basic component for connecting the entire device with the external belt sander. The connection is secured and detachable by a pin shaft. Multiple grinding wheel supports 2 can rotate on the support shaft 3, allowing the grinding wheel rollers 4 to flexibly adjust their angle and position to adapt to different grinding needs. Meanwhile, the external sanding belt is sleeved on the outside of the grinding wheel rollers 4, forming a complete grinding transmission system to ensure that the sanding belt maintains a stable running trajectory during the grinding process. A fixing plate 5 is installed on the side wall of the main frame 1. The fixing plate 5 is ring-shaped and is concentric with the support shaft 3. An angle scale line 6 is provided on the outer side wall of the fixing plate 5. An indicator groove 7 is provided on the side wall of the grinding wheel bracket 2. In this technical solution, the fixing plate 5 is concentrically set with the support shaft 3. The fixing plate 5 is made of transparent acrylic material. The angle scale line 6 on its outer side wall and the indicator groove 7 on the side wall of the grinding wheel bracket 2 form an angle positioning reference. The operator can accurately control the rotation angle of each grinding wheel bracket 2 by observing the scale line value aligned with the indicator groove 7, thereby realizing the quantitative adjustment of the sanding belt tension or grinding contact angle, and ensuring that the sanding belt maintains a stable working state during the grinding process.

[0015] In some technical solutions, the two ends of the support shaft 3 pass through the left and right side walls of the main frame 1 respectively. Threaded holes 8 are opened at the ends of both ends of the support shaft 3, and the threads of the two threaded holes 8 are opposite. Locking screws 9 are screwed into the two threaded holes 8. Locking pressure plates 10 are fixedly installed on the outside of the locking screws 9. The locking pressure plates 10 can support the main frame 1 and clamp and fix the grinding wheel bracket 2 through the main frame 1. A tightening handle 11 is installed at the end of the locking screw 9 away from the threaded hole 8.

[0016] In this technical solution, the support shaft 3 passes through the main frame 1 and is provided with a threaded hole 8, which provides a basis for the installation of the locking screw 9. When it moves inward, the locking plate 10 will hold the main frame 1, and then apply pressure to the grinding wheel bracket 2 through the main frame 1 to achieve clamping and fixation, ensuring that the grinding wheel bracket 2 will not loosen during the grinding operation and ensuring grinding accuracy. When it is necessary to adjust the angle of the grinding wheel bracket 2, the fixing can be loosened by rotating the tightening handle 11 in the opposite direction.

[0017] In some technical solutions, the grinding wheel support 2 includes a sun wheel support 21, a small grinding wheel support 22, and a large grinding wheel support 23. The sun wheel support 21, the small grinding wheel support 22, and the large grinding wheel support 23 are all sleeved on the outside of the support shaft 3 in the main frame 1. The grinding wheel roller 4 includes a sun wheel 41, a small grinding wheel 42, and a large grinding wheel 43. The sun wheel 41, the small grinding wheel 42, and the large grinding wheel 43 are respectively rotatably installed on the inside of the sun wheel support 21, the small grinding wheel support 22, and the large grinding wheel support 23.

[0018] In this technical solution, three different grinding wheel supports 2 are used in combination. Alternatively, any two of the sun wheel support 21, small grinding wheel support 22 and large grinding wheel support 23 can be combined or one grinding wheel support 2 can be used alone. When grinding the surface of some small arc-shaped workpieces, one of the grinding wheel supports 2 can be rotated to the front and the other two rotated to the rear, so that they do not contact the sanding belt. This allows the sanding belt to be supported only by the grinding wheel roller 4 on the front grinding wheel support 2, thereby forming a small angle for the sanding belt to process the workpiece. When machining workpieces with medium or large curvature, two or three grinding wheel supports can be combined to support the abrasive belt and increase its angle. The grinding wheel support 2 and grinding wheel roller 4 are designed in different categories. The sun wheel 41, small grinding wheel 42 and large grinding wheel 43 of different specifications are adapted to different grinding scenarios. For example, the sun wheel 41 can be used for preliminary grinding of large areas, while the small grinding wheel 42 and large grinding wheel 43 can be used for fine grinding or special part treatment of workpieces with different curvatures or sizes. By combining different grinding wheel supports 2 and grinding wheel roller 4, the application range of this device is greatly expanded and the grinding efficiency and quality are improved.

[0019] In some technical solutions, a vertical grinding plate 12 is also included. The upper and lower ends of the side wall of the vertical grinding plate 12 are provided with slots 13. The inner sides of the small grinding wheel bracket 22 and the large grinding wheel bracket 23 are both equipped with fixing rods 14. The two ends of the vertical grinding plate 12 are respectively installed on the two fixing rods 14 through the slots 13.

[0020] In this technical solution, the vertical grinding plate 12 is installed by the cooperation of the slot 13 and the fixing rod 14, which can form a stable connection structure between the small grinding wheel support 22 and the large grinding wheel support 23. The vertical grinding plate 12 can assist in supporting the grinding wheel support 2, enhancing the stability of the overall structure, especially when performing grinding operations with greater force, preventing the grinding wheel support from deforming or shaking. At the same time, the vertical grinding plate 12 can also serve as an auxiliary grinding surface for some workpieces, such as grinding the flat surface of a plate, further improving the diversity and practicality of grinding.

[0021] In some technical solutions, gaskets 15 are fitted on both sides of the support shaft 3, and the gaskets 15 are arranged between the sun gear bracket 21, the small grinding wheel bracket 22 and the large grinding wheel bracket 23.

[0022] In this technical solution, the shim 15 serves to isolate and increase friction, so that after the locking screw 9 is tightened, each grinding wheel bracket 2, the shim 15 and the main frame 1 fit tightly together, ensuring that the grinding wheel bracket 2 will not loosen during the grinding operation and guaranteeing the grinding accuracy.

[0023] In some technical solutions, the gasket 15 is made of metal.

[0024] In this technical solution, the material of the gasket 15 can be copper or aluminum.

[0025] In some technical solutions, a bushing 16 is sleeved in the middle of the outer wall of the support shaft 3, and the two ends of the grinding wheel bracket 2 are respectively set on the left and right sides of the bushing 16. The bushing 16 can support the inner side of the grinding wheel bracket 2.

[0026] Working principle: This device is mounted on an external belt sander via a pin on the main frame 1, forming a stable connection. According to the specific requirements of grinding the workpiece, firstly, the locking screw 9 is rotated by adjusting the handle 11 to loosen the fixation of the grinding wheel bracket 2. Then, the operator can rotate the grinding wheel bracket 2 and use the angle scale line 6 on the fixing plate 5 and the indicator groove 7 on the grinding wheel bracket 2 to precisely adjust the angle of each grinding wheel bracket 2, adjusting the grinding wheel roller 4 to the appropriate grinding position and angle. After the adjustment is completed, the adjusting handle 11 is rotated again to make the locking plate 10 clamp the grinding wheel bracket 2 through the main frame 1, ensuring that it remains fixed during the grinding process. During the grinding operation, the external belt sander drives the sanding belt to rotate, and the grinding roller 4 can support the sanding belt. Different specifications of grinding wheels, such as sun wheel 41, small grinding wheel 42, and large grinding wheel 43, can be used to perform different grinding operations. The vertical grinding plate 12 helps to enhance the structural stability and can also participate in some grinding work.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A belt sander grinding wheel rotation adjustment mechanism, comprising a main frame (1) and a grinding wheel support (2), wherein the main frame (1) is fixedly mounted on an external belt sander via a pin, characterized in that: The main frame (1) is equipped with a support shaft (3) on its inner side. The grinding wheel bracket (2) has at least two parts, which are all sleeved on the outside of the support shaft (3) and can rotate on the outside of the support shaft (3). The grinding wheel bracket (2) is rotatably installed with a grinding wheel roller (4) on its inner side, and the external sanding belt can be sleeved on the outside of the grinding wheel roller (4). The main frame (1) is equipped with a fixing plate (5) on its side wall. The fixing plate (5) is ring-shaped and is concentric with the support shaft (3). An angle scale line (6) is provided on the outer side wall of the fixing plate (5). The grinding wheel bracket (2) is provided with an indicator groove (7) on its side wall.

2. The belt sander grinding wheel rotation adjustment mechanism according to claim 1, characterized in that: The two ends of the support shaft (3) pass through the left and right side walls of the main frame (1) respectively. Threaded holes (8) are opened at the ends of both ends of the support shaft (3), and the threads of the two threaded holes (8) are opposite. Locking screws (9) are screwed into the two threaded holes (8). Locking pressure plates (10) are fixedly installed on the outside of the locking screws (9). The locking pressure plates (10) can support the main frame (1) and clamp the grinding wheel bracket (2) through the main frame (1). A tightening handle (11) is installed at the end of the locking screw (9) away from the threaded hole (8).

3. The belt sander grinding wheel rotation adjustment mechanism according to claim 1, characterized in that: The grinding wheel support (2) includes a sun wheel support (21), a small grinding wheel support (22), and a large grinding wheel support (23). The sun wheel support (21), the small grinding wheel support (22), and the large grinding wheel support (23) are all sleeved on the outside of the support shaft (3) in the main frame (1). The grinding wheel roller (4) includes a sun wheel (41), a small grinding wheel (42), and a large grinding wheel (43). The sun wheel (41), the small grinding wheel (42), and the large grinding wheel (43) are respectively rotatably installed on the inside of the sun wheel support (21), the small grinding wheel support (22), and the large grinding wheel support (23).

4. The belt sander grinding wheel rotation adjustment mechanism according to claim 3, characterized in that: It also includes a vertical grinding plate (12), with slots (13) provided at both the upper and lower ends of the side wall of the vertical grinding plate (12). Fixing rods (14) are installed on the inner sides of the small grinding wheel bracket (22) and the large grinding wheel bracket (23). The two ends of the vertical grinding plate (12) are respectively installed on the two fixing rods (14) through the slots (13).

5. The belt sander grinding wheel rotation adjustment mechanism according to claim 1, characterized in that: Gaskets (15) are fitted on both sides of the support shaft (3), and the gaskets (15) are arranged between the sun gear bracket (21), the small grinding wheel bracket (22) and the large grinding wheel bracket (23).

6. The belt sander grinding wheel rotation adjustment mechanism according to claim 5, characterized in that: The gasket (15) is made of metal.

7. The belt sander grinding wheel rotation adjustment mechanism according to claim 1, characterized in that: A bushing (16) is fitted into the middle of the outer wall of the support shaft (3). The two ends of the grinding wheel bracket (2) are respectively set on the left and right sides of the bushing (16). The bushing (16) can support the inner side of the grinding wheel bracket (2).

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