Pneumatic roll shaft brush strip grinding machine

Abstract

The utility model relates to the technical field of polishing equipment, in particular to a pneumatic roll shaft brush strip polishing machine. Comprising a U-shaped frame, one end of the U-shaped frame is fixedly connected with a motor shell, a pneumatic motor is fixedly installed in the motor shell, an output shaft of the pneumatic motor is coaxially and fixedly connected with a roller, and a plurality of brush strips are arranged on the circumferential side wall of the roller in an annular array mode; two bearings are coaxially and fixedly connected to the positions, close to the two ends, of the side wall of the motor shell, and outer rings of the bearings are fixedly arranged on the inner wall of the roller. According to the blade polishing device, the pneumatic motor is used for replacing a motor to drive the roller to rotate so as to polish blades, water used for cooling the blades can be prevented from permeating into the motor to cause electric leakage and short circuit of the motor, and the safety of polishing work is improved; and meanwhile, the dust collection shell with the sound absorption capacity is arranged on the outer side of the roller, and noise generated when the pneumatic motor works can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a pneumatic roller brush strip grinder. Background Art

[0002] For some super-large irregular workpiece surfaces, such as blades of large wind turbine equipment, it is obviously difficult to grind their surfaces with some large grinders, and the cost is also very high. In addition, when grinding the blades of wind turbine equipment, it is necessary to continuously spray water on the surface of the blades to cool them down to prevent the blades from being damaged by the high temperature generated by grinding. When water flows on the surface of the blades, it also plays a role in removing grinding chips and cleaning the blades. If electric grinding equipment is used to grind the blades, the motor of the grinding equipment will easily cause a safety hazard due to short circuit due to water inflow. Therefore, it is necessary to use pneumatic hand-push grinding equipment to grind the blades. Grinding with this pneumatic hand-push grinding equipment is convenient and fast, and the cost is also quite low, and it also improves the safety of the grinding work.

[0003] The pneumatic motor on the existing pneumatic hand-push grinding equipment is usually installed on the outer shell of the equipment. The pneumatic motor not only generates a large noise during operation, but also increases the occupied space of the grinding equipment, making it inconvenient for workers to transport and store the grinding equipment. At the same time, a number of brush strips are usually provided on the grinding roller in the grinding equipment. After the grinding equipment grinds the workpiece through a number of rotating brush strips, the wear degrees of the several brush strips are different. Workers need to replace the severely worn brush strips to prevent the grinding quality of the grinding equipment from declining. However, in order to facilitate the production of grinding rollers in the prior art, the brush strips are usually welded on the surface of the grinding roller. When workers replace part of the brush strips, they need to replace the entire grinding roller, resulting in a waste of resources and an increase in the maintenance cost of the grinding equipment. In view of this, we propose a pneumatic roller brush strip grinder. Utility Model Content

[0004] The purpose of the present utility model is to provide a pneumatic roller brush strip grinder to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, one of the purposes of the present utility model is to provide a pneumatic roller brush strip grinder, comprising a U-shaped frame, one end of the U-shaped frame is fixedly connected to a motor housing, an air motor is fixedly installed inside the motor housing, a roller is coaxially fixedly connected to the output shaft of the air motor, a plurality of brush strips are provided in a circular array on the circumferential side wall of the roller, the motor housing is coaxially arranged inside the roller, two bearings are coaxially fixedly connected to the side wall of the motor housing near both ends, the outer ring of the bearing is fixedly provided on the inner wall of the roller, two wheel frames are symmetrically provided on both sides of the U-shaped frame, and two rollers are rotatably provided on the sides of the two wheel frames away from each other, and the roller drives the brush strip to rotate when rotating to grind the surface of the blade.

[0006] As a further improvement of this technical solution, a dust collecting shell is rotatably arranged inside the U-shaped frame. The dust collecting shell is a semi-cylindrical structure. The roller and the brush bar located on the upper half of the roller are arranged inside the dust collecting shell. The dust collecting shell and the roller are coaxially arranged.

[0007] As a further improvement of this technical solution, the other end of the motor housing extends to the outside of the U-shaped frame and is rotatably connected to one of the wheel frames, and the other wheel frame is rotatably arranged on the side wall of the U-shaped frame. The end of the U-shaped frame away from the roller is fixedly connected to a handrail push rod.

[0008] As a further improvement of the present technical solution, an annular embedded groove is provided at the edge of one side of the roller, and a plurality of slots are provided in an annular array on the circumferential side wall of the roller. One end of the slot is connected to the embedded groove, and the end of the brush strip close to the axis of the roller is fixedly connected with an expansion part, and the expansion part is slidably arranged inside the corresponding slot.

[0009] As a further improvement of the present technical solution, two arc-shaped bars are provided inside the embedded groove, and the arc-shaped bars are fixed in the embedded groove by bolts. When the arc-shaped bar is fixedly connected to the inner wall of the embedded groove by bolts, the two arc-shaped bars are spliced ​​to form a circular ring, and the circular ring blocks one end of the slot connected to the embedded groove, and the expansion part contacts the side wall of the arc-shaped bar at one end close to the embedded groove.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This pneumatic roller brush grinder uses an air motor instead of an electric motor to drive the roller to rotate for grinding blades. This can prevent water used to cool and clean the blades from seeping into the motor and causing a short circuit in the motor, thereby improving the safety of the grinding work. By installing the air motor inside the roller and providing a dust-collecting shell with sound-absorbing ability on the outside of the roller, the noise generated by the air motor during operation can be reduced.

[0012] 2. This pneumatic roller brush strip grinder can replace some brush strips without replacing the roller, by removing the curved strip from the roller and moving the severely worn brush strip laterally until the expanded part is pulled out from the inside of the slot. This reduces maintenance costs while ensuring the grinding quality of the grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is one of the overall structural diagrams of the utility model;

[0014] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0015] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0016] Figure 4 This is a schematic structural diagram of the roller and brush strip of the utility model;

[0017] Figure 5 This is a schematic structural diagram of the arc strip and embedded groove of the utility model;

[0018] Figure 6 This is a schematic structural diagram of the slot of the utility model;

[0019] Figure 7 This is a structural diagram of the brush strip and expansion part of the utility model.

[0020] The meaning of each number in the figure is:

[0021] 1. U-shaped frame; 11. Handrail push rod; 12. Dust collection shell;

[0022] 2. Motor housing;

[0023] 3. Pneumatic motor;

[0024] 4. Roller; 41. Slot; 42. Curved bar; 43. Bolt; 44. Embedded groove;

[0025] 5. Bearings;

[0026] 6. Brush strip; 61. Expansion part;

[0027] 7. Wheel frame; 71. Roller. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] See also Figure 1-Figure 3As shown, one of the purposes of this embodiment is to provide a pneumatic roller brush strip grinder, including a U-shaped frame 1, one end of the U-shaped frame 1 is fixedly connected to a motor housing 2, an air motor 3 is fixedly installed inside the motor housing 2, a roller 4 is coaxially fixedly connected to the output shaft of the air motor 3, and a plurality of brush strips 6 are arranged in a ring array on the circumferential side wall of the roller 4. After the air motor 3 is started, its output shaft drives the roller 4 and the plurality of brush strips 6 to rotate, and the surface of the workpiece is grinded by the plurality of rotating brush strips 6, the motor housing 2 is coaxially arranged inside the roller 4, and two bearings 5 ​​are coaxially fixedly connected to the side wall of the motor housing 2 near both ends, and the outer ring of the bearing 5 is fixedly arranged on the inner wall of the roller 4. When the roller 4 rotates, it drives the brush strip 6 to rotate to grind the surface of the blade, and the air motor 3 is arranged inside the roller 4, which reduces the occupied space of the grinder and facilitates the operation of the grinder in a narrow space. The workpiece is ground in the U-shaped frame 1, and the transportation and storage of the grinder are convenient. At the same time, a dust collecting shell 12 is rotatably arranged inside the U-shaped frame 1. The dust collecting shell 12 is a semi-cylindrical structure and is made of sound-absorbing material. The roller 4 and the brush strip 6 located on the upper half of the roller 4 are arranged inside the dust collecting shell 12. The dust collecting shell 12 and the roller 4 are coaxially arranged. The dust collecting shell 12 and the roller 4 have a blocking and absorbing effect on the noise generated when the pneumatic motor 3 is working, thereby reducing the noise generated when the pneumatic motor 3 is working. By using the pneumatic motor 3 instead of the electric motor to drive the roller 4 to rotate to grind the blade, it can prevent part of the water from seeping into the motor and causing the motor to leak and short-circuit when the worker sprays water on the blade surface to cool it down. The pneumatic motor 3 is a device that converts the pressure energy of compressed air into rotational mechanical energy. It will not cause leakage and short-circuit failure due to water ingress, thereby improving the safety of the grinding work.

[0031] In order to facilitate workers to move the roller 4 to grind the predetermined position of the workpiece surface, two wheel frames 7 are symmetrically arranged on both sides of the U-shaped frame 1. Two rollers 71 are rotatably arranged on the side away from each other. The connection between the roller 71 and the wheel frame 7 is close to the bottom of the wheel frame 7. The other end of the motor housing 2 extends to the outside of the U-shaped frame 1 and is rotatably connected to one of the wheel frames 7. The other wheel frame 7 is rotatably arranged on the side wall of the U-shaped frame 1. At the same time, a handrail push rod 11 is fixedly connected to the end of the U-shaped frame 1 away from the roller 4. After the worker moves the grinder so that the roller 71 contacts the upper side of the processing table, he holds the armrest push rod 11 and pushes the grinder to rotate the roller 71, which can save effort to make the roller 4 close to the surface of the workpiece. Then the worker turns the armrest push rod 11 downward to make the U-shaped frame 1, motor housing 2, roller 4 and brush bar 6 rotate downward with the axis of the motor housing 2 as the center until several rotating brush bars 6 can contact the predetermined grinding positions on the upper side of the workpiece in turn, and the predetermined positions on the surface of the workpiece can be ground by the brush bars 6.

[0032] When there are relatively solid irregular protrusions on the surface of the workpiece, part of the brush strips 6 will first contact the protruding parts of the workpiece, causing severe wear of part of the brush strips 6, resulting in a wear degree of the brush strips 6 in this part being different from that of other brush strips 6. The severely worn brush strips 6 will reduce the grinding efficiency of the workpiece or even fail to play a grinding effect, resulting in a decrease in the overall grinding efficiency of the grinder for the workpiece. Therefore, workers need to replace the severely worn brush strips 6. In order to facilitate workers to replace part of the brush strips 6 without replacing the roller 4, refer to Figure 4-Figure 7 , an annular embedded groove 44 is opened on the edge of one side of the roller 4, and a plurality of slots 41 are opened in an annular array on the circumferential side wall of the roller 4. One end of the slot 41 is connected to the embedded groove 44, and the end of the brush strip 6 close to the axis of the roller 4 is fixedly connected to the expansion part 61, and the expansion part 61 is slidably arranged inside the corresponding slot 41. The part of the slot 41 close to the axis of the roller 4 is wider, and the part away from the axis of the roller 4 is narrower. Therefore, when the expansion part 61 is embedded in the slot 41, the brush strip 6 cannot move in the direction away from the axis of the roller 4. Two arc-shaped strips 42 are provided inside the embedded groove 44, and the arc-shaped strips 42 are fixed in the embedded groove 44 by bolts 43. When the arc-shaped strips 42 are fixedly connected to the inner wall of the embedded groove 44 by bolts 43, the two arc-shaped strips 42 are spliced ​​to form a circular ring, and the circular ring blocks the end of the slot 41 connected to the embedded groove 44. The end of the expansion part 61 close to the embedded groove 44 contacts the side wall of the arc-shaped strip 42, and the arc-shaped strip 42 prevents the expansion part 61 from moving laterally out of the inside of the slot 41, thereby fixing the brush strip 6 on the circumferential side wall of the roller 4.

[0033] When a worker needs to replace a part of the brush strip 6 that is severely worn, he unscrews the corresponding bolt 43 to remove the arc strip 42 in contact with the brush strip 6 from the inside of the embedded groove 44, and pulls out the expansion part 61 on the brush strip 6 from the inside of the slot 41 to complete the removal of the brush strip 6. After removing the worn brush strip 6, the expansion part 61 of the new brush strip 6 is inserted into the inside of the slot 41, and then the arc strip 42 is installed to its original position through the bolt 43. The brush strip 6 can be replaced without replacing the roller 4, which reduces the maintenance cost while ensuring the grinding quality of the grinder.

[0034] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic roller brush strip grinding machine comprising a U-shaped frame (1), characterized in that: One end of the U-shaped frame (1) is fixedly connected to a motor housing (2), an air motor (3) is fixedly installed inside the motor housing (2), a roller (4) is coaxially fixedly connected to the output shaft of the air motor (3), a plurality of brush strips (6) are arranged in an annular array on the circumferential side wall of the roller (4), the motor housing (2) is coaxially arranged inside the roller (4), two bearings (5) are coaxially fixedly connected to the side wall of the motor housing (2) near both ends, the outer ring of the bearing (5) is fixedly arranged on the inner wall of the roller (4), two wheel frames (7) are symmetrically arranged on both sides of the U-shaped frame (1), and two rollers (71) are rotatably arranged on the sides of the two wheel frames (7) away from each other, and the roller (4) drives the brush strips (6) to rotate when rotating to grind the surface of the blade.

2. The pneumatic roller brush grinder according to claim 1, characterized in that: A dust collecting shell (12) is rotatably arranged inside the U-shaped frame (1); the dust collecting shell (12) is a semi-cylindrical structure; the roller (4) and the brush strip (6) located on the upper half of the roller (4) are arranged inside the dust collecting shell (12); and the dust collecting shell (12) and the roller (4) are coaxially arranged.

3. The pneumatic roller brush grinder according to claim 1, characterized in that: The other end of the motor housing (2) extends to the outside of the U-shaped frame (1) and is rotatably connected to one of the wheel frames (7), and the other wheel frame (7) is rotatably arranged on the side wall of the U-shaped frame (1). The end of the U-shaped frame (1) away from the roller (4) is fixedly connected to a handrail push rod (11).

4. The pneumatic roller brush grinder according to claim 1, characterized in that: An annular embedded groove (44) is provided at the edge of one side of the roller (4), and a plurality of slots (41) are provided in an annular array on the circumferential side wall of the roller (4), one end of the slot (41) is connected to the embedded groove (44), and an expansion portion (61) is fixedly connected to one end of the brush strip (6) close to the axis of the roller (4), and the expansion portion (61) is slidably arranged inside the corresponding slot (41).

5. The pneumatic roller brush grinder according to claim 4, characterized in that: Two arc-shaped bars (42) are provided inside the embedded groove (44), and the arc-shaped bars (42) are fixed in the embedded groove (44) by bolts (43). When the arc-shaped bars (42) are fixedly connected to the inner wall of the embedded groove (44) by bolts (43), the two arc-shaped bars (42) are spliced ​​to form a circular ring, and the circular ring blocks one end of the slot (41) connected to the embedded groove (44), and the expansion portion (61) is in contact with the side wall of the arc-shaped bar (42) at one end close to the embedded groove (44).

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