Floor grinding machine capable of avoiding height difference

Abstract

The invention discloses a floor grinding machine capable of avoiding height difference, and relates to the technical field of ground grinding, the floor grinding machine comprises a frame, an electric control device is arranged at the top of the frame, a dust collector is fixedly mounted on the right side of the frame, wheels are rotatably mounted at the bottom of the frame, and a water tank is fixedly mounted at the bottom of the frame; a water level monitoring device is arranged in the water tank, a lifting arm is rotationally installed on the left side of the vehicle frame, a shell is fixedly installed on the left side of the lifting arm, an anti-splashing device is arranged in the shell, a protection device is arranged on the left side of the shell, and a heat dissipation device is arranged in the shell; the anti-splashing device comprises a first motor, a rotating shaft, a grinding head, a protruding block, a push rod, a slope rod, a baffle ring, an elastic telescopic rod, a moving ring and a slope block, high points or uneven areas on the road surface are removed through rotation of the grinding head, the road surface flatness is improved, future crack expansion is reduced, road surface aging is delayed, and long-term durability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of floor grinding, and in particular to a floor grinding machine capable of avoiding height differences. Background Art

[0002] Floor grinders that can avoid height differences are usually used for grinding, polishing, cleaning and repairing concrete or stone floors. They are usually equipped with multiple grinding discs or grinding tools to flatten and smooth the floor surface by rotating and grinding to achieve the purpose of repairing, decorating or improving the quality of the floor.

[0003] The patent with patent announcement number CN206010659U relates to the field of floor grinding technology. The patent proposes an intelligent floor grinding robot. The intelligent floor grinding robot includes a traction device, a grinding device and a water absorption device. The traction device is arranged at the front end of the floor grinding robot; the grinding device and the water absorption device are arranged at the bottom of the floor grinding robot. Among them, the floor grinding robot also includes a control system, which is used to drive the traction device, the grinding device and the water absorption device to work together as a whole after receiving the control command, so that the floor grinding robot can move, grind the stone and clean the waste generated during the grinding process fully automatically. The floor grinding robot of this patent can not only improve work efficiency and save costs, but also reduce the harm of dust in the working environment to operators.

[0004] In the above patent, the traction device, the grinding device and the water absorption device work together as a whole so that the grinding robot can move, grind stones and clean up the waste chips generated during the grinding process fully automatically. However, during the grinding process, it is difficult to deal with the gravel generated during grinding and it is difficult to protect the grinding device. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a floor grinding machine capable of avoiding height differences, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a floor grinding machine capable of avoiding height differences, comprising a frame, an electric control device is arranged on the top of the frame, a vacuum cleaner is fixedly installed on the right side of the frame, a wheel is rotatably installed on the bottom of the frame, a water tank is fixedly installed on the bottom of the frame, a water level monitoring device is arranged inside the water tank, a lifting arm is rotatably installed on the left side of the frame, a shell is fixedly installed on the left side of the lifting arm, an anti-splash device is arranged inside the shell, a protective device is arranged on the left side of the shell, and a heat dissipation device is arranged inside the shell; Among them, the anti-splash device includes a motor 1, a rotating shaft, a grinding head, a bump, a push rod, a bevel rod, a retaining ring, an elastic telescopic rod, a movable ring and a bevel block. The motor 1 is fixedly mounted on the top of the shell, the rotating shaft is fixedly mounted on the output end of the motor 1, the grinding head is fixedly mounted on the end of the rotating shaft away from the output end of the motor 1, the bump is fixedly mounted on the circumferential surface of the rotating shaft, the push rod is slidably mounted on the inner wall of the shell, the bevel rod is slidably mounted on the inner wall of the shell, the retaining ring is fixedly mounted on the bottom of the shell, the elastic telescopic rod is fixedly mounted on the inner wall of the shell, the movable ring is fixedly mounted on the movable end of the elastic telescopic rod, and the bevel block is fixedly mounted on the top of the movable ring. The motor 1 drives the rotating shaft to start rotating, and the rotation of the rotating shaft drives the grinding head to start rotating. The grinding head rotates to remove high spots or uneven areas on the road surface.

[0007] According to the above technical solution, the side of the protrusion and the push rod in contact with each other is set as a slope, the side of the push rod and the sloped rod in contact with each other is set as a slope, the side of the sloped rod and the sloped block in contact with each other is set as a slope, and a spring 1 is set between the sloped rod and the inner wall of the shell. By setting the slope, it is ensured that the protrusion can smoothly push the push rod when rotating, and by setting the slope, it is ensured that the push rod can smoothly push the sloped rod when moving, and by setting the slope, it is ensured that the sloped rod can smoothly push the sloped block when moving, and by setting the spring 1, it is ensured that the sloped rod can achieve self-reset.

[0008] According to the above technical solution, the protective device includes a rack, two rotating columns, a transmission belt, a gear, a sliding column and a baffle. The rack is fixedly installed on the back of the moving ring, the two rotating columns are rotatably installed on the top of the baffle ring, the two rotating columns are connected by a transmission belt, the gear is fixedly installed on the circumferential surface of the rotating column, the sliding column slides through the outer shell, and the baffle is fixedly installed on the end of the sliding column away from the inner wall of the outer shell. The movement of the rack drives the gear to start rotating, the rotation of the gear drives the rotating column to start rotating, the rotation of the rotating column drives the transmission belt to start rotating, the rotation of the transmission belt drives the sliding column to start moving, and the movement of the sliding column drives the baffle to start moving.

[0009] According to the above technical solution, the protective device also includes a sliding rod, a push plate, an elastic telescopic block, a U-shaped rod and a pulley. The sliding rod slides through the outer shell, the push plate is fixedly installed on the end of the sliding rod away from the inner wall of the outer shell, the elastic telescopic block is fixedly installed on the top of the push plate, the U-shaped rod slides through the retaining ring, and the pulley is rotatably installed at the bottom of the U-shaped rod. The elastic telescopic block shrinks the push plate downward to drive the sliding rod to start moving, and the movement of the sliding rod pushes the U-shaped rod to start moving. The movement of the U-shaped rod causes the pulley at its bottom to contact the ground and prop up the outer shell.

[0010] The U-shaped rod is preferably a bottom-up rod and a bottom-up rod, and the bottom-up rod has a U-shaped rod that is a bottom-up rod and a bottom-up rod, respectively.

[0011] According to the above technical solution, the heat dissipation device includes a second motor, a rotating rod and a fan. The second motor is fixedly installed on the top of the inner wall of the outer shell, the rotating rod is fixedly installed on the output end of the second motor, and the fan is fixedly installed on the circumferential surface of the rotating rod. The second motor drives the rotating rod to start rotating, and the rotation of the rotating rod drives the fan to start rotating. The rotation of the fan accelerates the air circulation, which can effectively take away the heat generated when the grinding head is working.

[0012] According to the above technical solution, the heat dissipation device also includes gear 2, a guard plate, a connecting rod and rack 2. The gear 2 is fixedly installed on the circumferential surface of the rotating rod, the guard plate is rotatably installed on the top of the inner wall of the outer shell, the rack 2 is slidably installed on the bottom of the motor 2, one end of the connecting rod is slidably installed on the front of the guard plate, and the other end of the connecting rod is fixedly installed on the front of the rack 2. When the rotating rod rotates, it drives the gear 2 to start rotating. The rotation of the gear 2 drives the rack 2 to start moving. The movement of the rack 2 drives the connecting rod to start moving. The movement of the connecting rod drives the guard plate to start rotating. The guard plate rotates and contacts and assembles with another guard plate.

[0013] According to the above technical solution, gear 2 is meshed with rack 2, and spring 3 is arranged between the guard plate and the top of the inner wall of the shell. The meshing ensures that gear 2 can drive rack 2 to move when it rotates, and the spring 3 is arranged to ensure that the guard plate can achieve autonomous reset.

[0014] The present invention provides a floor grinding machine capable of avoiding height differences, and has the following beneficial effects:

[0015] (1) The invention starts the rotation of the grinding head by rotating the shaft. The grinding head rotates to remove high spots or uneven areas on the road surface, thereby improving the flatness of the road surface. Grinding can reduce the further expansion of cracks in the future and delay the aging process of the road surface, thereby improving its long-term durability. The gap between the grinding head and the outer shell is sealed by the movement of the moving ring and the retaining ring, ensuring that no excessive grinding debris, stone chips or other impurities enter the interior of the grinder, reducing the wear of these impurities on the machine, transmission system or motor, and preventing the splashing of gravel produced by grinding from causing damage to other parts inside the outer shell.

[0016] (2) The invention starts to move the baffle plate by moving the sliding column. The movement of the baffle plate can effectively prevent the floor grinder from making direct contact with obstacles during the grinding process, thereby reducing the chance of the machine body being scratched or bumped, reducing damage to the grinder surface, and extending the service life of the equipment. The U-shaped rod starts to move by moving the sliding rod. The U-shaped rod moves so that the pulley at its bottom contacts the ground to prop up the outer shell, ensuring that the outer shell can pass through the protrusion smoothly. There will be no accidental shutdown due to the protrusion on the road surface, thereby reducing working time.

[0017] (3) The invention starts the fan by rotating the rotating rod. The rotation of the fan accelerates the air circulation, which can effectively remove the heat generated by the grinding head during operation, reduce the temperature of the machine body and the grinding head, reduce failures and losses caused by overheating, and prevent excessive temperature from causing adhesion or uneven grinding on the floor surface. The guard plate rotates to contact and mate with another guard plate. After the guard plates contact and mate with each other, they protect the fan during rotation, effectively blocking the entry of dust, debris and other sundries, ensuring the long-term normal operation of the fan and ensuring that the fan will not be hit by gravel or other foreign matter generated during grinding, causing the fan to be damaged and stop working normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the housing and the motor of the present invention; Figure 3 It is a schematic cross-sectional view of the housing structure of the present invention; Figure 4 It is a schematic cross-sectional view of the structure of the motor 1 and the grinding head of the present invention; Figure 5 It is a schematic cross-sectional view of the structure of the anti-splash device of the present invention; Figure 6 It is a schematic cross-sectional view of the structure of the protective device of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the structure enlargement of part A; Figure 8 It is a cross-sectional schematic diagram of the sliding rod and U-shaped rod structure of the present invention; Fig. 9 It is a schematic cross-sectional view of the heat dissipation device structure of the present invention; Fig.10 It is a schematic cross-sectional view of the guard plate and connecting rod structure of the present invention.

[0019] In the figure: 1, frame; 2, electronic control device; 3, vacuum cleaner; 4, wheel; 5, water tank; 6, lifting arm; 7, housing; 8, motor 1; 9, rotating shaft; 10, grinding head; 11, bump; 12, push rod; 13, inclined rod; 14, retaining ring; 15, elastic telescopic rod; 16, moving ring; 17, inclined block; 181, rack 1; 182, rotating column; 183, transmission belt; 184, gear 1; 185, sliding column; 186, baffle; 187, sliding rod; 188, push plate; 189, elastic telescopic block; 1810, U-shaped rod; 1811, pulley; 191, motor 2; 192, rotating rod; 193, fan; 194, gear 2; 195, guard plate; 196, connecting rod; 197, rack 2. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 10 One embodiment of the present invention is: a floor grinding machine capable of avoiding height difference, comprising a frame 1, an electric control device 2 is arranged on the top of the frame 1, a vacuum cleaner 3 is fixedly installed on the right side of the frame 1, a wheel 4 is rotatably installed on the bottom of the frame 1, a water tank 5 is fixedly installed on the bottom of the frame 1, a water level monitoring device is arranged inside the water tank 5, a lifting arm 6 is rotatably installed on the left side of the frame 1, a shell 7 is fixedly installed on the left side of the lifting arm 6, and an anti-splash device is arranged inside the shell 7; Among them, the anti-splash device includes a motor 8, a rotating shaft 9, a grinding head 10, a protrusion 11, a push rod 12, a bevel rod 13, a retaining ring 14, an elastic telescopic rod 15, a moving ring 16 and a bevel block 17. The motor 8 is fixedly installed on the top of the shell 7, the rotating shaft 9 is fixedly installed on the output end of the motor 8, the grinding head 10 is fixedly installed on the end of the rotating shaft 9 away from the output end of the motor 8, the protrusion 11 is fixedly installed on the circumferential surface of the rotating shaft 9, the push rod 12 is slidably installed on the inner wall of the shell 7, the bevel rod 13 is slidably installed on the inner wall of the shell 7, the retaining ring 14 is fixedly installed on the bottom of the shell 7, the elastic telescopic rod 15 is fixedly installed on the inner wall of the shell 7, the moving ring 16 is fixedly installed on the movable end of the elastic telescopic rod 15, and the bevel block 17 is fixedly installed on the top of the moving ring 16. The rotation of the rotating shaft 9 drives the grinding head 10 to start rotating. The grinding head 10 rotates to remove high points or uneven areas on the road surface, thereby improving the flatness of the road surface. Grinding can reduce the further expansion of cracks in the future and delay the aging process of the road surface, thereby improving its long-term durability.

[0022] The side where the protrusion 11 and the push rod 12 contact each other is set as an inclined plane, the side where the push rod 12 and the inclined plane rod 13 contact each other is set as an inclined plane, the side where the inclined plane rod 13 and the inclined plane block 17 contact each other is set as an inclined plane, and a spring 1 is set between the inclined plane rod 13 and the inner wall of the shell 7. By setting the inclined plane, it is ensured that the protrusion 11 can smoothly push the push rod 12 when rotating, and by setting the inclined plane, it is ensured that the push rod 12 can smoothly push the inclined plane rod 13 when moving, and by setting the inclined plane, it is ensured that the inclined plane rod 13 can smoothly push the inclined plane block 17 when moving, and by setting the spring 1, it is ensured that the inclined plane rod 13 can achieve self-reset.

[0023] When this embodiment is working: first, the frame 1 is placed on the road surface where work is required, and the electronic control system 2 is started after confirming that the working environment is safe. After the electronic control system 2 is started, the lifting arm 6 is rotated to make the grinding head 10 contact the road surface where work is required, and then the electronic control system 2 drives the vacuum cleaner 3 and the wheel 4 to start working. After the frame 1 starts to move, the motor 8 is started, so that the motor 8 drives the shaft 9 to start rotating, and the rotation of the shaft 9 drives the grinding head 10 to start rotating. The grinding head 10 rotates to remove high points or uneven areas on the road surface and improve the flatness of the road surface. Grinding can reduce the further expansion of cracks in the future and delay the aging process of the road surface, thereby improving its long-term durability; while the shaft 9 rotates, it drives the bump 11 to start rotating, and the bump 1 1 rotates and pushes the push rod 12 to start moving, the push rod 12 moves and pushes the inclined rod 13 to start moving, the inclined rod 13 moves and pushes the inclined block 17 to start moving, the inclined block 17 moves and drives the moving ring 16 to start moving, the moving ring 16 moves and cooperates with the retaining ring 14 to seal the gap between the grinding head 10 and the shell 7, ensuring that no excessive grinding debris, stone chips or other impurities enter the grinder, reducing the wear of these impurities on the machine, transmission system or motor, and preventing the debris generated by grinding from splashing and causing damage to other parts inside the shell 7. During grinding, the water tank 5 pumps water outward to cool down and reduce dust. At the same time, the water level monitoring device inside the water tank 5 will detect the water level inside the water tank 5 in real time to ensure that the water tank 5 will not be excessively short of water.

[0024] See also Figure 1-Figure 10On the basis of the above embodiment, in another embodiment of the present invention, a protective device is provided on the left side of the shell 7, and a heat dissipation device is provided inside the shell 7. The protective device includes a rack 181, two rotating columns 182, a transmission belt 183, a gear 184, a sliding column 185 and a baffle 186. The rack 181 is fixedly installed on the back of the moving ring 16, and the two rotating columns 182 are rotatably installed on the top of the baffle ring 14. The two rotating columns 182 are connected by transmission belt 183, and the gear 184 is fixedly installed on the circumferential surface of the rotating column 182. The sliding column 185 slides through the shell 7, and the baffle 186 is fixedly installed at one end of the sliding column 185 away from the inner wall of the shell 7. The sliding column 185 moves to push the baffle 186 to start moving. The movement of the baffle 186 can effectively prevent the floor grinder from directly contacting obstacles during the grinding process, thereby reducing the chance of the machine body being scratched or bumped, reducing damage to the surface of the grinder, and extending the service life of the equipment.

[0025] The protective device also includes a slide bar 187, a push plate 188, an elastic telescopic block 189, a U-shaped bar 1810 and a pulley 1811. The slide bar 187 slides through the outer shell 7, the push plate 188 is fixedly installed at the end of the slide bar 187 away from the inner wall of the outer shell 7, the elastic telescopic block 189 is fixedly installed on the top of the push plate 188, the U-shaped bar 1810 slides through the retaining ring 14, and the pulley 1811 is rotatably installed at the bottom of the U-shaped bar 1810. The U-shaped bar 1810 is pushed to start moving by the movement of the slide bar 187. The U-shaped bar 1810 moves so that the pulley 1811 at its bottom contacts the ground to prop up the outer shell 7, ensuring that the outer shell 7 can pass through the protrusion smoothly, and will not cause accidental shutdown due to the protrusion of the road surface, thereby reducing working time.

[0026] Rack 181 is meshed with gear 184, one end of sliding column 185 close to the inner wall of shell 7 is fixedly installed on the top of transmission belt 183, the side of sliding rod 187 and U-shaped rod 1810 in contact with each other is set as an inclined surface, the side of elastic telescopic block 189 and baffle 186 in contact with each other is set as an inclined surface, and spring 2 is arranged between U-shaped rod 1810 and the inner wall of shell 7, and the engagement ensures that rack 181 can drive gear 184 to rotate when it moves, and the fixed installation ensures that the transmission belt 183 can drive the sliding column 185 to move when it rotates, and the inclined surface ensures that the sliding rod 187 can smoothly push the U-shaped rod 1810 when it moves, and the inclined surface ensures that the elastic telescopic block 189 can smoothly shrink, and the spring 2 ensures that the U-shaped rod 1810 can achieve self-reset.

[0027] The heat dissipation device includes a motor 191, a rotating rod 192 and a fan 193. The motor 191 is fixedly installed on the top of the inner wall of the outer shell 7, the rotating rod 192 is fixedly installed on the output end of the motor 191, and the fan 193 is fixedly installed on the circumferential surface of the rotating rod 192. The rotation of the rotating rod 192 drives the fan 193 to start rotating. The rotation of the fan 193 accelerates the air circulation, which can effectively take away the heat generated by the grinding head 10 during operation, reduce the temperature of the machine body and the grinding head 10, reduce failures and losses caused by overheating, and prevent excessive temperature from causing adhesion or uneven grinding on the floor surface.

[0028] The heat dissipation device also includes gear 2 194, guard plate 195, connecting rod 196 and rack 2 197. Gear 2 194 is fixedly mounted on the circumferential surface of rotating rod 192, guard plate 195 is rotatably mounted on the top of the inner wall of shell 7, rack 2 197 is slidably mounted on the bottom of motor 2 191, one end of connecting rod 196 is slidably mounted on the front of guard plate 195, and the other end of connecting rod 196 is fixedly mounted on the front of rack 2 197. Guard plate 195 rotates to contact and mate with another guard plate 195. After the guard plates 195 contact and mate with each other, they protect fan 193 during its rotation, effectively blocking the entry of dust, debris and other sundries, ensuring the long-term normal operation of fan 193 and ensuring that fan 193 will not be hit by gravel and other foreign objects generated during grinding, causing fan 193 to be damaged and shut down and unable to work normally.

[0029] Gear 2 194 meshes with rack 2 197, and spring 3 is arranged between guard plate 195 and the top of the inner wall of shell 7, which ensures that gear 2 194 can drive rack 2 197 to move when rotating through meshing, and guard plate 195 can achieve self-reset by setting spring 3.

[0030] When the present embodiment is working, the moving ring 16 drives the rack 181 to start moving, the rack 181 moves and drives the gear 184 to start rotating, the gear 184 rotates and drives the rotating column 182 to start rotating, the rotating column 182 rotates and drives the transmission belt 183 to start rotating, the transmission belt 183 rotates and drives the sliding column 185 to start moving, the sliding column 185 moves and drives the baffle 186 to start moving, the movement of the baffle 186 can effectively prevent the floor grinder from directly contacting obstacles during the grinding process, thereby reducing the chances of the machine body being scratched or bumped, reducing damage to the surface of the grinder, and extending the service life of the equipment; when the baffle 186 moves At the same time, the push plate 188 is pushed to start moving, and the movement of the push plate 188 drives the sliding rod 187 to start moving. The movement of the sliding rod 187 no longer pushes the U-shaped rod 1810, and the U-shaped rod 1810 starts to reset under the action of spring 2. Then the push plate 188 is pushed when encountering a higher part of the road surface protrusion, and the elastic telescopic block 189 shrinks downward to drive the push plate 188 to drive the sliding rod 187 to start moving. The movement of the sliding rod 187 drives the U-shaped rod 1810 to start moving. The U-shaped rod 1810 moves so that the pulley 1811 at its bottom contacts the ground to prop up the shell 7, ensuring that the shell 7 can pass through the protrusion smoothly, and will not cause accidental shutdown due to the protrusion of the road surface, thereby reducing working time.

[0031] When the road surface is started to be ground, the motor 2 191 is started, so that the motor 2 191 drives the rotating rod 192 to start rotating, and the rotating rod 192 rotates to drive the fan 193 to start rotating. The rotation of the fan 193 accelerates the air circulation, which can effectively take away the heat generated by the grinding head 10 when it is working, reduce the temperature of the machine body and the grinding head 10, reduce the failure and loss caused by overheating, and prevent the excessive temperature from causing adhesion or uneven grinding on the floor surface; when the rotating rod 192 rotates, it drives the gear 2 194 to start rotating, and the gear 2 194 rotates to drive The movable rack 197 starts to move, the movement of the rack 197 drives the connecting rod 196 to start moving, the movement of the connecting rod 196 drives the guard plate 195 to start rotating, the guard plate 195 rotates and contacts and mates with another guard plate 195, and after the guard plates 195 contact and mate with each other, they protect the fan 193 during its rotation, effectively blocking the entry of dust, debris and other sundries, ensuring the long-term normal operation of the fan 193 and ensuring that the fan 193 will not be hit by gravel and other foreign matter generated during grinding, causing the fan 193 to be damaged and shut down and unable to work normally.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floor grinding machine capable of avoiding height differences, comprising a frame (1), characterized in that: An electric control device (2) is arranged on the top of the vehicle frame (1); a vacuum cleaner (3) is fixedly mounted on the right side of the vehicle frame (1); a wheel (4) is rotatably mounted on the bottom of the vehicle frame (1); a water tank (5) is fixedly mounted on the bottom of the vehicle frame (1); a water level monitoring device is arranged inside the water tank (5); a lifting arm (6) is rotatably mounted on the left side of the vehicle frame (1); a housing (7) is fixedly mounted on the left side of the lifting arm (6); an anti-splash device is arranged inside the housing (7); a protective device is arranged on the left side of the housing (7); and a heat dissipation device is arranged inside the housing (7); The anti-splash device comprises a motor (8), a rotating shaft (9), a grinding head (10), a bump (11), a push rod (12), a bevel rod (13), a retaining ring (14), an elastic telescopic rod (15), a moving ring (16) and a bevel block (17), wherein the motor (8) is fixedly mounted on the top of the housing (7), the rotating shaft (9) is fixedly mounted on the output end of the motor (8), the grinding head (10) is fixedly mounted on an end of the rotating shaft (9) away from the output end of the motor (8), the bump (11) is fixedly mounted on the circumferential surface of the rotating shaft (9), the push rod (12) is slidably mounted on the inner wall of the housing (7), the bevel rod (13) is slidably mounted on the inner wall of the housing (7), the retaining ring (14) is fixedly mounted on the bottom of the housing (7), the elastic telescopic rod (15) is fixedly mounted on the inner wall of the housing (7), the moving ring (16) is fixedly mounted on the movable end of the elastic telescopic rod (15), and the bevel block (17) is fixedly mounted on the top of the moving ring (16).

2. A floor grinding machine capable of avoiding height difference according to claim 1, characterized in that: The side where the protrusion (11) and the push rod (12) contact each other is set as an inclined surface, the side where the push rod (12) and the inclined surface rod (13) contact each other is set as an inclined surface, the side where the inclined surface rod (13) and the inclined surface block (17) contact each other is set as an inclined surface, and a spring is provided between the inclined surface rod (13) and the inner wall of the housing (7).

3. A floor grinding machine capable of avoiding height difference according to claim 2, characterized in that: The protective device comprises a rack (181), two rotating columns (182), a transmission belt (183), a gear (184), a sliding column (185) and a baffle (186); the rack (181) is fixedly mounted on the back of the moving ring (16); the two rotating columns (182) are rotatably mounted on the top of the baffle ring (14); the two rotating columns (182) are connected by transmission via a transmission belt (183); the gear (184) is fixedly mounted on the circumferential surface of the rotating column (182); the sliding column (185) slides through the outer shell (7); and the baffle (186) is fixedly mounted on one end of the sliding column (185) away from the inner wall of the outer shell (7).

4. A floor grinding machine capable of avoiding height difference according to claim 3, characterized in that: The protective device further comprises a sliding rod (187), a push plate (188), an elastic telescopic block (189), a U-shaped rod (1810) and a pulley (1811); the sliding rod (187) slides through the housing (7); the push plate (188) is fixedly mounted on an end of the sliding rod (187) away from the inner wall of the housing (7); the elastic telescopic block (189) is fixedly mounted on the top of the push plate (188); the U-shaped rod (1810) slides through the retaining ring (14); and the pulley (1811) is rotatably mounted on the bottom of the U-shaped rod (1810).

5. A floor grinding machine capable of avoiding height difference according to claim 4, characterized in that: The rack 1 (181) is meshed with the gear 1 (184); one end of the sliding column (185) close to the inner wall of the outer shell (7) is fixedly mounted on the top of the transmission belt (183); a surface of the sliding rod (187) and the U-shaped rod (1810) in contact with each other is set as an inclined surface; a surface of the elastic telescopic block (189) and the baffle (186) in contact with each other is set as an inclined surface; and a spring 2 is provided between the U-shaped rod (1810) and the inner wall of the outer shell (7).

6. A floor grinding machine capable of avoiding height difference according to claim 5, characterized in that: The heat dissipation device comprises a second motor (191), a rotating rod (192) and a fan (193); the second motor (191) is fixedly mounted on the top of the inner wall of the housing (7); the rotating rod (192) is fixedly mounted on the output end of the second motor (191); and the fan (193) is fixedly mounted on the circumferential surface of the rotating rod (192).

7. A floor grinding machine capable of avoiding height difference according to claim 6, characterized in that: The heat dissipation device also includes gear 2 (194), a guard plate (195), a connecting rod (196) and rack 2 (197), wherein gear 2 (194) is fixedly mounted on the circumferential surface of the rotating rod (192), the guard plate (195) is rotatably mounted on the top of the inner wall of the housing (7), the rack 2 (197) is slidably mounted on the bottom of motor 2 (191), one end of the connecting rod (196) is slidably mounted on the front of the guard plate (195), and the other end of the connecting rod (196) is fixedly mounted on the front of rack 2 (197).

8. A floor grinding machine capable of avoiding height difference according to claim 7, characterized in that: The second gear (194) is meshed with the second rack (197), and a third spring is provided between the guard plate (195) and the top of the inner wall of the outer shell (7).

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