Adjustable plane belt sander

Abstract

The utility model discloses an adjustable plane belt sander which comprises an operation table, a polishing part and an adjusting part, a supporting frame is arranged at the top of the operation table, the polishing part is arranged at the top of the operation table, the polishing part is provided with a rotating plate rotationally arranged on the side face of the supporting frame, and the adjusting part is arranged at the top of the operation table. The adjusting part is provided with a connecting frame arranged at the top of the supporting frame, a transmission shaft is rotationally arranged in the connecting frame and connected with the rotating plate in a meshed mode, the transmission shaft rotates to control the rotating angle of the rotating plate, a rotating handle is arranged on the side face of the transmission shaft in a sliding mode, and a spring is arranged on the outer side of the transmission shaft in an embedded mode. By arranging the adjusting part, accurate angle adjustment can be achieved through meshing connection of the transmission shaft and the rotating plate, meanwhile, the spring is used for pushing the rotating handle and the connecting frame to be automatically clamped and locked, the stability after grinding angle adjustment is guaranteed, and the problems that a traditional bolt fixing mode is tedious in operation and prone to loosening are solved.

Description

Technical Field

[0001] This utility model relates to the field of belt sander technology, specifically an adjustable flat belt sander. Background Technology

[0002] A belt sander is a power tool or device that uses a ring-shaped abrasive belt for grinding, polishing, or deburring. It is driven by a motor to move the abrasive belt at high speed, using the abrasive particles on the belt surface to cut and process the workpiece surface. It is widely used in woodworking, metal processing, and composite material processing.

[0003] The existing adjustable flat belt sander angle adjustment is mainly achieved by the operator directly rotating the adjustment plate and then fixing the angle with bolts. Each adjustment requires manual tightening, and it cannot achieve self-locking after the angle is adjusted. An additional locking operation is required after the angle is adjusted, which is cumbersome. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable flat belt sander to solve the problem mentioned in the background art. The existing adjustable flat belt sanders mainly rely on the operator to directly rotate the adjustment plate and then fix the angle with bolts. Each adjustment requires manual tightening, which cannot achieve self-locking after the angle is adjusted. After the angle is adjusted, an additional locking operation is required, which is cumbersome.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable flat belt sander, comprising an operating table, a grinding section, and an adjustment section:

[0006] The operating table is equipped with a support frame on top, and a grinding part is located on top of the operating table. The grinding part has a rotating plate rotatably mounted on the side of the support frame. An adjustment part is located on top of the operating table and has a connecting frame located on top of the support frame. A drive shaft is rotatably mounted inside the connecting frame and meshes with the rotating plate. The drive shaft rotates to control the rotation angle of the rotating plate. A handle is slidably mounted on the side of the drive shaft and engages with the connecting frame. A spring is nested on the outside of the drive shaft and pushes the handle to slide and engage with the connecting frame to fix the rotation angle of the drive shaft.

[0007] By adopting the above technical solution, precise angle adjustment can be achieved through the meshing connection between the drive shaft and the rotating plate. At the same time, the spring pushes the rotating handle to automatically engage and lock with the connecting frame, ensuring the stability after the grinding angle is adjusted, and avoiding the problems of cumbersome operation and easy loosening of the traditional bolt fixing method.

[0008] Preferably, the grinding part also has a power wheel rotatably disposed on the side of the support frame, a motor is disposed on the side of the support frame, the output end of the motor is connected to the power wheel, a sanding belt is disposed on the side of the power wheel, and two adjusting wheels are rotatably disposed on the side of the rotating plate, the adjusting wheels abutting against the sanding belt.

[0009] By adopting the above technical solution, the sanding belt can be driven by a motor to drive the power wheel, and two adjusting wheels can be used to guide the sanding belt, ensuring that the sanding belt can maintain a stable running trajectory at different angles.

[0010] Preferably, the grinding unit also has a tension frame rotatably mounted on top of the power wheel, a tension wheel is provided on the side of the tension frame, the tension wheel abuts against the sanding belt, a tension spring is provided at the end of the tension frame away from the tension wheel, and the other end of the tension spring is connected to the support frame, the tension spring provides elastic force to pull the tension frame to rotate.

[0011] By adopting the above technical solution, the elastic tension of the tension spring can drive the tension wheel to apply a constant tension force to the sanding belt, effectively compensating for the elongation and deformation of the sanding belt during use and maintaining the stable operation of the sanding belt.

[0012] Preferably, the adjustment part also has a rotating groove formed inside the connecting frame, and the drive shaft is embedded in the rotating groove and rotatably connected to the connecting frame.

[0013] By adopting the above technical solution, a stable rotational support can be provided for the drive shaft through the rotary groove.

[0014] Preferably, the adjusting part also has a ring of locking teeth a disposed on the side of the connecting frame, the locking teeth a being evenly distributed circumferentially along the rotating groove, and a ring of locking teeth b disposed on the side of the rotating handle near the connecting frame, the locking teeth b being evenly distributed circumferentially along the rotating handle, the locking teeth a and the locking teeth b engaging and connecting.

[0015] By adopting the above technical solution, the rotation angle of the handle can be fixed by the meshing of the locking teeth a and b.

[0016] Preferably, the adjusting part also has a bevel tooth b disposed at one end of the transmission shaft, and a bevel tooth a disposed at one end of the rotating plate, the bevel tooth a being engaged with the bevel tooth b.

[0017] By adopting the above technical solution, the rotational motion of the transmission shaft can be converted into the angle adjustment of the rotating plate through the meshing of bevel teeth b and bevel teeth a, thereby realizing power transmission and angle transformation.

[0018] Preferably, the number of teeth of bevel tooth a is greater than the number of teeth of bevel tooth b, and bevel tooth a and bevel tooth b constitute a speed reduction transmission mechanism.

[0019] By adopting the above technical solution, the reduction ratio can be formed by the difference in the number of teeth of bevel teeth a and b, enabling the operator to more accurately control the angle change of the rotating plate when rotating the handle, thereby improving the precision of angle adjustment.

[0020] Preferably, the drive shaft has a cross shaft inside, and the handle has a cross groove inside, with the cross shaft embedded in the cross groove and slidably connected to the handle axially.

[0021] By adopting the above technical solution, the axial sliding connection between the handle and the drive shaft can be achieved through the cooperation of the cross shaft and the cross groove, ensuring that the handle can still drive the drive shaft to rotate when it moves axially, while maintaining uninterrupted power transmission between the two.

[0022] Compared with the prior art, the advantages of this utility model are: by setting an adjustment part, precise angle adjustment can be achieved through the meshing connection between the transmission shaft and the rotating plate. At the same time, the spring pushes the rotating handle to automatically engage and lock with the connecting frame, ensuring the stability after the grinding angle is adjusted, and avoiding the problems of cumbersome operation and easy loosening of the traditional bolt fixing method. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the overall structure of this application;

[0025] Figure 3 This is a schematic cross-sectional view of the adjustment section of this application;

[0026] Figure 4 This is a schematic diagram of the connection structure between the drive shaft and the rotating plate in this application;

[0027] Figure 5 This is a schematic diagram of the exploded structure of the adjustment part in this application.

[0028] In the diagram: 1. Operating table; 101. Support frame; 2. Grinding section; 201. Power wheel; 202. Tension frame; 203. Tension wheel; 204. Motor; 205. Tension spring; 206. Rotating plate; 207. Bevel tooth a; 208. Adjusting wheel; 209. Sanding belt; 3. Adjusting section; 301. Connecting frame; 302. Rotating groove; 303. Clamping tooth a; 304. Drive shaft; 305. Bevel tooth b; 306. Cross shaft; 307. Spring; 308. Rotating handle; 309. Cross groove; 310. Clamping tooth b. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: an adjustable flat belt sander, including an operating table 1, a grinding section 2, and an adjustment section 3.

[0032] A support frame 101 is provided on the top of the operating table 1. The grinding part 2 is provided on the top of the operating table 1. The grinding part 2 has a rotating plate 206 rotatably mounted on the side of the support frame 101. A power wheel 201 is rotatably mounted on the side of the support frame 101. A motor 204 is provided on the side of the support frame 101. The output end of the motor 204 is connected to the power wheel 201. The working principle of the motor 204 is based on electromagnetic induction and Lorentz force. The motor 204 generates force in the magnetic field through current, thereby driving mechanical movement. The above is the prior art and will not be described in detail below. A sanding belt 209 is provided on the side of the power wheel 201. Two adjusting wheels 208 are rotatably mounted on the side of the rotating plate 206. The adjusting wheels 208 abut against the sanding belt 209. The power wheel 201 can be driven by the motor 204 to drive the sanding belt 209 to rotate. At the same time, the two adjusting wheels 208 are used to guide the sanding belt 209 to ensure that the sanding belt 209 maintains a stable running trajectory at different angles.

[0033] A tension frame 202 is rotatably mounted on top of the power wheel 201. A tension wheel 203 is mounted on the side of the tension frame 202. The tension wheel 203 abuts against the sanding belt 209. A tension spring 205 is mounted on the end of the tension frame 202 away from the tension wheel 203. The other end of the tension spring 205 is connected to the support frame 101. The tension spring 205 provides elastic force to pull the tension frame 202 to rotate. The elastic tension of the tension spring 205 can cause the tension frame 202 to drive the tension wheel 203 to apply a constant tension force to the sanding belt 209, effectively compensating for the elongation and deformation of the sanding belt 209 during use and maintaining the stable operation of the sanding belt 209.

[0034] The adjustment unit 3 is located on the top of the operating table 1. The adjustment unit 3 has a connecting frame 301 located on the top of the support frame 101. A drive shaft 304 is rotatably mounted inside the connecting frame 301. The drive shaft 304 is meshed with the rotating plate 206. The rotation of the drive shaft 304 controls the rotation angle of the rotating plate 206. A rotating handle 308 is slidably mounted on the side of the drive shaft 304. The rotating handle 308 is engaged with the connecting frame 301. A spring 307 is nested on the outside of the drive shaft 304. The spring 307 pushes the rotating handle 308 to slide and engage with the connecting frame 301 to fix the rotation angle of the drive shaft 304. Precise angle adjustment can be achieved through the meshing connection between the drive shaft 304 and the rotating plate 206. At the same time, the automatic engagement and locking of the rotating handle 308 with the connecting frame 301 by the spring 307 ensures the stability after the grinding angle is adjusted, avoiding the problems of cumbersome operation and easy loosening of the traditional bolt fixing method.

[0035] Example 1

[0036] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: an adjustable flat belt sander, including an adjustment unit 3, a connecting frame 301, and a drive shaft 304.

[0037] A rotating groove 302 is provided inside the connecting frame 301. The drive shaft 304 is embedded in the rotating groove 302 and rotatably connected to the connecting frame 301. The rotating groove 302 can provide stable rotational support for the drive shaft 304.

[0038] A ring of retaining teeth a303 is integrally provided on the side of the connecting frame 301. The retaining teeth a303 are evenly distributed around the circumference of the rotating groove 302. A ring of retaining teeth b310 is provided on the side of the rotating handle 308 near the connecting frame 301. The retaining teeth b310 are evenly distributed around the circumference of the rotating handle 308. The retaining teeth a303 and b310 are engaged and connected, and the rotation angle of the rotating handle 308 can be fixed by the engagement of the retaining teeth a303 and b310.

[0039] A bevel tooth b305 is provided at one end of the drive shaft 304, and a bevel tooth a207 is provided at one end of the rotating plate 206. The bevel tooth a207 meshes with the bevel tooth b305. The rotational motion of the drive shaft 304 can be converted into the angle adjustment of the rotating plate 206 through the meshing of the bevel teeth b305 and a207, realizing power transmission and angle change. The number of teeth of the bevel tooth a207 is greater than the number of teeth of the bevel tooth b305. The bevel teeth a207 and b305 form a reduction transmission mechanism. The reduction ratio can be formed by the difference in the number of teeth of the bevel teeth a207 and b305, so that the operator can more accurately control the angle change of the rotating plate 206 when rotating the handle 308, and improve the precision of the angle adjustment.

[0040] The drive shaft 304 has a cross shaft 306 inside, and the handle 308 has a cross groove 309 inside. The cross shaft 306 is embedded in the cross groove 309 and is axially slidably connected to the handle 308.

[0041] The axial sliding connection between the handle 308 and the drive shaft 304 can be achieved through the cooperation of the cross shaft 306 and the cross groove 309, ensuring that the handle 308 can still drive the drive shaft 304 to rotate when moving axially, while maintaining uninterrupted power transmission between the two.

[0042] Working principle: First, when adjusting the angle, the operator pulls the handle 308 outward to compress the spring 307, causing the retaining tooth b310 to disengage from the retaining tooth a303. Then, the operator rotates the handle 308, which drives the transmission shaft 304 to rotate through the cross shaft 306. The transmission shaft 304 then drives the rotating plate 206 to rotate through the meshing of the bevel teeth b305 and a207, changing the grinding angle. When the appropriate angle is reached, the operator releases the handle 308, and the spring 307 pushes the handle 308 back to its original position. The retaining teeth b310 and a303 re-engage, locking the current angle. Then, the motor 204 is started to drive the sanding belt 209 to run for grinding. During the grinding process, the tension spring 205 maintains a constant tension on the sanding belt 209 through the tension frame 202 and the tension wheel 203.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable flat-belt sander, characterized by, include: An operating table (1) is provided with a support frame (101) on its top; Grinding section (2) is provided on the top of the operating table (1) and has a rotating plate (206) rotatably disposed on the side of the support frame (101). An adjustment unit (3) is provided on the top of the operating table (1). The adjustment unit (3) has a connecting frame (301) provided on the top of the support frame (101). A drive shaft (304) is rotatably provided inside the connecting frame (301). The drive shaft (304) is engaged with the rotating plate (206). The drive shaft (304) rotates to control the rotation angle of the rotating plate (206). A handle (308) is slidably provided on the side of the drive shaft (304). The handle (308) is engaged with the connecting frame (301). A spring (307) is nested on the outside of the drive shaft (304). The spring (307) pushes the handle (308) to slide and engage with the connecting frame (301) to fix the rotation angle of the drive shaft (304).

2. An adjustable flat-belt sander according to claim 1, characterized in that: The grinding section (2) also has a power wheel (201) rotatably mounted on the side of the support frame (101). A motor (204) is mounted on the side of the support frame (101), and the output end of the motor (204) is connected to the power wheel (201). A sanding belt (209) is mounted on the side of the power wheel (201). Two adjusting wheels (208) are rotatably mounted on the side of the rotating plate (206), and the adjusting wheels (208) abut against the sanding belt (209).

3. The adjustable flat-belt sander according to claim 1, characterized in that: The grinding section (2) also has a tension frame (202) rotatably mounted on top of the power wheel (201). A tension wheel (203) is provided on the side of the tension frame (202), and the tension wheel (203) abuts against the sanding belt (209). A tension spring (205) is provided at one end of the tension frame (202) away from the tension wheel (203), and the other end of the tension spring (205) is connected to the support frame (101). The tension spring (205) provides elastic force to pull the tension frame (202) to rotate.

4. The adjustable flat-belt sander according to claim 1, characterized in that: The adjustment part (3) also has a rotating groove (302) opened inside the connecting frame (301), and the drive shaft (304) is embedded in the rotating groove (302) and rotatably connected to the connecting frame (301).

5. The adjustable flat belt sander of claim 1, wherein: The adjustment part (3) also has a ring of locking teeth a (303) on the side of the connecting frame (301). The locking teeth a (303) are evenly distributed around the rotating groove (302). A ring of locking teeth b (310) is provided on the side of the rotating handle (308) near the connecting frame (301). The locking teeth b (310) are evenly distributed around the rotating handle (308). The locking teeth a (303) and locking teeth b (310) are engaged and connected.

6. The adjustable flat-belt sander according to claim 1, characterized in that: The adjustment part (3) also has a bevel tooth b (305) provided at one end of the transmission shaft (304), and a bevel tooth a (207) provided at one end of the rotating plate (206), which meshes with the bevel tooth b (305).

7. An adjustable flat-belt sander according to claim 6, characterized in that: The number of teeth of bevel tooth a (207) is greater than the number of teeth of bevel tooth b (305), and bevel tooth a (207) and bevel tooth b (305) constitute a speed reduction transmission mechanism.

8. The adjustable flat belt sander of claim 1, wherein: The drive shaft (304) has a cross shaft (306) inside, and the handle (308) has a cross groove (309) inside. The cross shaft (306) is embedded in the cross groove (309) and is axially slidably connected to the handle (308).

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