Grinding machine belt transmission wheel convenient to replace

Abstract

The utility model discloses a polisher belt pulley convenient to replace, which relates to the technical field of polishers and comprises a base, a plurality of side stoppers are fixedly mounted on the base, a plurality of spindles are rotatably mounted on the base, a plurality of clamping grooves are arranged in the spindles, inner sliding pipes are slidably mounted in the spindles, and the inner sliding pipes are slidably mounted in the side stoppers. A clamping groove is formed in the inner wall of the main shaft, a rotating handle is rotatably installed at the end, away from the main shaft, of the inner sliding pipe, a protruding clamping block is slidably installed on the inner sliding pipe, and the protruding clamping block can be matched with the clamping groove in the inner wall of the main shaft. Therefore, the inner sliding pipe and the inner check ring can be separated from the main shaft, then the strip abrasive paper is rapidly replaced, and the replacement difficulty of the strip abrasive paper is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grinders, in particular to a belt drive wheel of a grinder which is easy to replace. Background Art

[0002] As an important processing equipment, grinders are widely used in metal processing, building materials and floor construction. The working method of the grinder is mainly to transmit power through the friction between the sandpaper strips and the pulley to move the sandpaper strips, and then place the object to be polished on the sandpaper strips for polishing.

[0003] The Chinese invention patent with publication number: CN116604457A discloses a polishing machine that is convenient for replacing polished parts. After the clamping block in this device is separated from the through slot, the polishing shaft can be directly removed from between the two support plates, making it convenient for the staff to replace the polishing shaft, start the third motor, so that the first gear column and the second gear column can drive the docking plate to move up and down along the gear frame, which is convenient for adjusting the distance between the part and the polishing shaft, and place the replaced polishing shaft on the upper side of the support plate, so that the docking block is docked with the docking groove, so that the clamping block can be aligned with the clamping groove, making it convenient for the polishing machine to position and install the polishing shaft.

[0004] The above-mentioned device and the prior art both improve various positioning of the grinder, but do not take into account the problem of replacing the strip sandpaper on the grinder. At the same time, since the strip sandpaper is a consumable, if the user operates it improperly or incorrectly, it is easy to quickly wear out the strip sandpaper. In addition, the wear and tear of the strip sandpaper is often impossible to judge during use, and can only be judged by the naked eye or experience, resulting in low working efficiency of the grinder. Utility Model Content

[0005] In view of the above technical problems, the present invention proposes the following technical solutions:

[0006] A belt drive wheel of a grinder that is easy to replace comprises a base, a plurality of side blocks are fixedly installed on the base, a plurality of main shafts are rotatably installed on the base, a strip of sandpaper for grinding is arranged on the outer wall of the main shaft, a fixed retaining ring is fixedly installed on the outer wall of the main shaft, the fixed retaining ring is slidably connected with the base, a plurality of positioning grooves are arranged in the main shaft, an inner sliding tube is slidably installed in the main shaft, a rotating handle is rotatably installed at one end of the inner sliding tube away from the main shaft, an extrusion shaft is fixedly installed on the rotating handle, the extrusion shaft is arranged in the inner sliding tube, and the extrusion shaft is rotatably connected with the inner sliding tube. A squeezing cam is fixedly installed on the end of the squeezing shaft away from the rotating handle, and a locking opening is provided at the end of the inner sliding tube away from the rotating handle. A protruding blocking block is slidably installed on the inner sliding tube, and the protruding blocking block can fit into the locking groove on the inner wall of the main shaft. The protruding blocking block is arranged in the locking opening on the inner sliding tube, and the protruding blocking block contacts the squeezing cam. A blocking block spring is fixedly installed on the protruding blocking block, and the other end of the blocking block spring is fixedly installed in the inner sliding tube to assist the movement of the protruding blocking block. When the rotating handle is rotated, the rotating handle will drive the protruding blocking block to move through the squeezing cam.

[0007] Furthermore, an outer retaining ring is fixedly installed at one end of the inner sliding tube outside the main shaft, a bearing is arranged on the outer retaining ring, the other end of the bearing is arranged on the inner retaining ring, the inner retaining ring can contact with the sandpaper strip, the inner wall of the outer retaining ring contacts with the outer wall of the main shaft, the inner wall of the inner retaining ring contacts with the outer wall of the main shaft, a rotating torsion spring is fixedly installed on the rotating handle, and the other end of the rotating torsion spring is fixedly installed on the outer wall of the inner sliding tube.

[0008] Furthermore, a calibration box is provided on one side of the base, an outer dial is fixedly mounted on one side of the calibration box, a plurality of scales are arranged on the outer dial, a dial pointer is rotatably mounted on the outer dial, and a swing groove is arranged on the protruding block.

[0009] Furthermore, a sliding column is fixedly installed in the calibration box, a push plate is slidably installed on the sliding column, a restoring spring is also fixedly installed on the push plate, the other end of the restoring spring is fixedly installed on the inner wall of the calibration box, a cross plate is also provided on the push plate, a transmission rod is provided on the push plate, the transmission rod is slidably connected to the outer dial, and the end of the transmission rod away from the sliding column is provided in a swinging groove on the dial pointer.

[0010] Furthermore, a plurality of pressing plates are slidably mounted on the calibration box, and a pressing wheel is rotatably mounted on one end of the pressing plate disposed outside the calibration box. The pressing wheel contacts the strip of sandpaper, and a pressing spring is fixedly mounted on the pressing plate, and the other end of the pressing spring is fixed inside the calibration box.

[0011] Compared with the prior art, the present invention has the following advantages: (1) when the handle is turned, the protruding block of the device disengages from the retaining groove on the main shaft, thereby allowing the inner slide tube and the inner retaining ring to be separated from the main shaft, thereby allowing the strip sandpaper to be quickly replaced, thereby reducing the difficulty of replacing the strip sandpaper; (2) the device contacts the strip sandpaper through a pressure wheel, allowing the pressure wheel to detect the degree of depression on the strip sandpaper, thereby displaying the degree of depression on the strip sandpaper through the cooperation of the dial pointer and the outer dial. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the structure of the main shaft, inner sliding tube, outer retaining ring, bearing and inner retaining ring after sectioning of the utility model.

[0014] Figure 3 for Figure 2 A partial enlarged view of point A.

[0015] Figure 4 It is a schematic diagram of the structure of the main shaft, inner sliding tube and calibration box after sectioning of the utility model.

[0016] Figure 5 This is a schematic diagram of the cross-section structure of the calibration box of the utility model.

[0017] 1-base; 102-side block; 103-sandpaper strip; 201-fixed retaining ring; 202-main shaft; 203-protruding block; 204-extrusion cam; 205-inner sliding tube; 206-block spring; 207-extrusion shaft; 208-outer retaining ring; 209-bearing; 210-inner retaining ring; 211-rotating handle; 300-push plate; 301-outer dial; 302-dial pointer; 303-sliding column; 304-restoring spring; 305-pressing plate; 306-pressing spring; 307-calibration box; 309-pressing wheel. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] like Figures 1 to 4As shown, a belt drive wheel of a grinder that is easy to replace includes a base 101, a plurality of side blocks 102 are fixedly installed on the base 101, a plurality of main shafts 202 are rotatably installed on the base 101, the main shafts 202 are arranged in parallel on the base 101, and a strip of sandpaper 103 for grinding is arranged on the outer wall of the main shaft 202, a fixed retaining ring 201 is fixedly installed on the outer wall of the main shaft 202, the fixed retaining ring 201 is slidably connected to the base 101, a plurality of positioning grooves are arranged in the main shaft 202, and an inner sliding tube 20 is slidably installed in the main shaft 202 5. An outer retaining ring 208 is fixedly installed at one end of the inner sliding tube 205 outside the main shaft 202. A bearing 209 is arranged on the outer retaining ring 208. The other end of the bearing 209 is arranged on the inner retaining ring 210. The inner retaining ring 210 can contact with the strip sandpaper 103. The bearing 209 is used to prevent the inner retaining ring 210 from contacting with both sides of the strip sandpaper 103 to hinder the movement of the strip sandpaper 103. When the strip sandpaper 103 is working, the fixed retaining ring 201 and the inner retaining ring 210 will limit the position of the strip sandpaper 103 to prevent the strip sandpaper 103 from swinging at will.

[0020] like Figures 1 to 4 As shown, the inner wall of the outer retaining ring 208 contacts the outer wall of the main shaft 202, the inner wall of the inner retaining ring 210 contacts the outer wall of the main shaft 202, the end of the inner sliding tube 205 away from the main shaft 202 is rotatably mounted with a rotating handle 211, a rotating torsion spring is fixedly mounted on the rotating handle 211, the other end of the rotating torsion spring is fixedly mounted on the outer wall of the inner sliding tube 205, an extrusion shaft 207 is fixedly mounted on the rotating handle 211, the extrusion shaft 207 is arranged in the inner sliding tube 205, the extrusion shaft 207 is rotatably connected to the inner sliding tube 205, the end of the extrusion shaft 207 away from the rotating handle 211 is fixedly mounted with an extrusion cam 204, the inner sliding tube 205 A locking opening is provided at the end away from the rotating handle 211, and a protruding block 203 is slidably installed on the inner sliding tube 205. The protruding block 203 can fit into the locking groove on the inner wall of the main shaft 202. The protruding block 203 is arranged in the locking opening on the inner sliding tube 205, and the protruding block 203 contacts the squeezing cam 204. A block spring 206 is fixedly installed on the protruding block 203, and the other end of the block spring 206 is fixedly installed in the inner sliding tube 205 to assist the movement of the protruding block 203. When the rotating handle 211 is rotated, the rotating handle 211 will drive the protruding block 203 to move through the squeezing cam 204.

[0021] like Figure 2 , Figure 4 , Figure 5As shown, a calibration box 307 is also provided on one side of the base 101, an outer dial 301 is fixedly installed on one side of the calibration box 307, a plurality of scales are provided on the outer dial 301, a dial pointer 302 is rotatably installed on the outer dial 301, a swing groove is provided on the protruding block 203, a sliding column 303 is fixedly installed in the calibration box 307, a push plate 300 is slidably installed on the sliding column 303, a restoring spring 304 is also fixedly installed on the push plate 300, the other end of the restoring spring 304 is fixedly installed on the inner wall of the calibration box 307, a cross plate is also provided on the push plate 300, a transmission rod is provided on the push plate 300, the transmission rod is slidably connected to the outer dial 301, and one end of the transmission rod is away from the sliding column 303 A plurality of pressing plates 305 are slidably installed on the calibration box 307, and a pressure wheel 309 is rotatably installed on one end of the pressing plate 305 outside the calibration box 307. The pressure wheel 309 contacts the strip sandpaper 103. A pressing spring 306 is fixedly installed on the pressing plate 305. The other end of the pressing spring 306 is fixed in the calibration box 307. One end of the pressing plate 305 arranged in the calibration box 307 contacts the cross plate of the push plate 300. When the pressure wheel 309 moves and is fixed close to the axis of the main shaft 202, it will drive the push plate 300 to move together. After the push plate 300 moves, it will drive the dial pointer 302 to swing through the transmission rod, and then it is displayed to the user through the scale on the outer dial 301.

[0022] Working principle: When the strip sandpaper 103 is replaced, the rotating handle 211 is rotated to drive the extrusion cam 204 to rotate. Figure 4The protruding block 203 is then moved toward the axis of the extrusion shaft 207 by rotating the block spring 206 90 degrees counterclockwise. In this way, the protruding block 203 can be disengaged from the positioning groove on the spindle 202. After the protruding block 203 is disengaged from the positioning groove, the inner slide tube 205 can be pulled to move the inner slide tube 205, the outer retaining ring 208, and the inner retaining ring 210 together away from the fixed retaining ring 201. In this way, the inner slide tube 205 can be completely taken out, and the entire light-sensitive part of the spindle 202 can be exposed. The same operation can be used on the other spindle 202. In this way, the strip sandpaper 103 on the spindle 202 can be taken out or installed through the side where the inner slide tube 205 is installed. After replacing the strip sandpaper 103, the inner slide tube 205 is manually pushed to slide the inner slide tube 205 inside the main shaft 202, and at the same time, the outer retaining ring 208 and the inner retaining ring 210 are in contact with the outer wall of the main shaft 202. The purpose is to allow the protruding block 203 to enter the main shaft 202 and prepare to clamp the position of the main inner slide tube 205. When the inner retaining ring 210 moves to contact one side of the strip sandpaper 103, the rotating handle 211 can be released, and the rotating handle 211 drives the extrusion cam 204 through the rotating torsion spring to drive the protruding block 203 to engage with the clamping groove on the main shaft 202, so that the position of the inner slide tube 205 is fixed. In this way, the strip sandpaper 103 is clamped by the inner retaining ring 210 and the fixed retaining ring 201.

[0023] When the device is working, the main shaft 202 is driven to rotate by the external driving device, so that the main shaft 202 drives the strip sandpaper 103 to move, so that the parts can be placed on the strip sandpaper 103 for grinding, and when the main shaft 202 rotates, the outer retaining ring 208, the inner sliding tube 205, and the inner retaining ring 210 will rotate together. During the working process of the strip sandpaper 103, due to the different grinding forces of the user and the grinding object, the surface of the strip sandpaper 103 will be uneven, and when the strip sandpaper 103 moves, it will drive the pressure wheel 309 to rotate, and the pressure wheel 309 will The depressions on the surface of the strip sandpaper 103 are continuously detected. When the pressure wheel 309 moves, the push plate 300 is driven to move, and the push plate 300 drives the dial pointer 302 to rotate through the transmission rod. If there is a small depression on the strip sandpaper 103, the dial pointer 302 will swing continuously. When a whole depression appears somewhere on the strip sandpaper 103, the dial pointer 302 will cooperate with the outer dial 301 to reflect the degree of wear of the strip sandpaper 103. When the depression on the strip sandpaper 103 reaches a certain depth or the swing amplitude is too large, the strip sandpaper 103 must be replaced.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A belt drive wheel of a grinder that is easy to replace, comprising a base (101), a plurality of side blocks (102) being fixedly mounted on the base (101), a plurality of main shafts (202) being rotatably mounted on the base (101), and strips of sandpaper (103) for grinding being arranged on the outer walls of the main shafts (202), characterized in that: A fixed retaining ring (201) is fixedly installed on the outer wall of the main shaft (202), and the fixed retaining ring (201) is slidably connected to the base (101). A plurality of positioning grooves are arranged in the main shaft (202), and an inner sliding tube (205) is slidably installed in the main shaft (202). A rotating handle (211) is rotatably installed at one end of the inner sliding tube (205) away from the main shaft (202), and an extrusion shaft (207) is fixedly installed on the rotating handle (211). The extrusion shaft (207) is arranged in the inner sliding tube (205), and the extrusion shaft (207) is rotatably connected to the inner sliding tube (205). An extrusion cam (204) is fixedly installed at one end of the extrusion shaft (207) away from the rotating handle (211). A locking opening is provided at one end of the rotating handle (211), and a protruding locking block (203) is slidably mounted on the inner sliding tube (205). The protruding locking block (203) can fit into a locking groove on the inner wall of the main shaft (202). The protruding locking block (203) is arranged in the locking opening on the inner sliding tube (205), and the protruding locking block (203) contacts the extrusion cam (204). A locking block spring (206) is fixedly mounted on the protruding locking block (203), and the other end of the locking block spring (206) is fixedly mounted in the inner sliding tube (205) to assist the movement of the protruding locking block (203). When the rotating handle (211) is rotated, the rotating handle (211) drives the protruding locking block (203) to move through the extrusion cam (204).

2. The belt drive wheel of a grinder that is easy to replace according to claim 1, characterized in that: An outer retaining ring (208) is fixedly mounted on one end of the inner sliding tube (205) outside the main shaft (202), a bearing (209) is arranged on the outer retaining ring (208), the other end of the bearing (209) is arranged on the inner retaining ring (210), the inner retaining ring (210) can contact with the strip sandpaper (103), the inner wall of the outer retaining ring (208) contacts with the outer wall of the main shaft (202), the inner wall of the inner retaining ring (210) contacts with the outer wall of the main shaft (202), and a rotating torsion spring is fixedly mounted on the rotating handle (211), the other end of the rotating torsion spring is fixedly mounted on the outer wall of the inner sliding tube (205).

3. The belt drive wheel of a grinder that is easy to replace according to claim 1, characterized in that: A calibration box (307) is also provided on one side of the base (101), an outer dial (301) is fixedly mounted on one side of the calibration box (307), a plurality of scales are provided on the outer dial (301), a dial pointer (302) is rotatably mounted on the outer dial (301), and a swing groove is provided on the protruding block (203).

4. The belt drive wheel of a grinder that is easy to replace according to claim 3, characterized in that: A sliding column (303) is fixedly installed in the calibration box (307), a push plate (300) is slidably installed on the sliding column (303), a restoring spring (304) is also fixedly installed on the push plate (300), the other end of the restoring spring (304) is fixedly installed on the inner wall of the calibration box (307), a transverse plate is also arranged on the push plate (300), a transmission rod is arranged on the push plate (300), the transmission rod is slidably connected to the outer dial (301), and one end of the transmission rod away from the sliding column (303) is arranged in a swing groove on the dial pointer (302).

5. The belt drive wheel of a grinder that is easy to replace according to claim 3, characterized in that: A plurality of pressing plates (305) are slidably mounted on the calibration box (307); a pressing wheel (309) is rotatably mounted on one end of the pressing plate (305) disposed outside the calibration box (307); the pressing wheel (309) is in contact with the strip of sandpaper (103); a pressing spring (306) is fixedly mounted on the pressing plate (305); the other end of the pressing spring (306) is fixed in the calibration box (307).

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