CN114670100B

CN114670100B - Double-handle polishing machine

Info

Publication number: CN114670100B
Application number: CN202210269895.3A
Authority: CN
Inventors: 洪小云; 俞倩; 廖卫平
Original assignee: Zhejiang Chengkang Machinery & Electrical Product Manufacturing Co ltd
Current assignee: Zhejiang Chengkang Machinery & Electrical Product Manufacturing Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2023-07-28
Anticipated expiration: 2042-03-18
Also published as: CN114670100A

Abstract

The invention relates to the technical field of handheld polishing machines, in particular to a double-handle polishing machine, which comprises: a handle device, the interior of which is formed with an installation cavity; the driving device is vertically arranged in the mounting cavity; the polishing device is arranged at the opening, is connected with the output shaft and rotates around the output shaft; wherein the handle device has at least: the lower end of the shell is provided with a cylinder body, the installation cavity is formed in the cylinder body, and the lower end of the installation cavity is provided with an opening; and a control mechanism installed in the housing for controlling the operation of the driving device. The invention realizes double-hand holding by arranging the first holding part and the second holding part on the shell, the large thenar part of the palm is completely attached, the first holding part and the second holding part are distributed in a splayed shape, the polishing device is more in accordance with the design of human engineering, and solves the problems of unstable holding by one hand, easy use fatigue, influence on polishing effect and use safety.

Description

Double-handle polishing machine

Technical Field

The invention relates to the technical field of handheld polishing machines, in particular to a double-handle polishing machine.

Background

Polishers, also known as grinders, are often used for mechanical grinding, polishing and waxing. The working principle is as follows: the motor drives the sponge or wool polishing disc arranged on the polishing machine to rotate at a high speed, and the polishing disc and the polishing agent jointly act and rub the surface to be polished, so that the purposes of removing paint surface pollution, oxide layers and shallow marks can be achieved.

The existing polishing machine, for example, patent 2019210858680, discloses a motor comprising a shell and a motor arranged in the shell, wherein a balance weight is fixedly connected to a motor rotating shaft, and the polishing machine is characterized in that a concave stirring groove is formed in the surface of the balance weight, facing one side of the motor, and an air outlet is formed in the shell.

The polishing machine is designed to be held by adopting a handle mode, and the other hand is used for applying pressure to ensure the polishing effect; however, in the practical use process, once pressure is applied, torsion is generated at the handle part, the situation of unstable holding is easily generated by single hand holding, even the pressure is overlarge, the holding is unstable, after long-time use, the hand with pressure is easily tired, the hand with pressure is easy to slip, the whole person slides down, even the hand with pressure collides with metal to be polished, and the danger of use is caused.

Disclosure of Invention

The invention aims to provide a double-handle polishing machine, which is characterized in that a first holding part and a second holding part are arranged on a shell to realize double-handle holding, the large thenar part of a palm is completely attached, meanwhile, the first holding part and the second holding part are distributed in a splayed shape, the double-handle polishing machine is more in accordance with the ergonomic design, and the problems that the single-handle holding is unstable, the use is tired easily, and the polishing effect and the use safety are affected are solved.

The purpose of the invention is realized in the following way:

a dual grip handle polisher, comprising:

a handle device, the interior of which is formed with an installation cavity;

the driving device is vertically arranged in the mounting cavity;

the polishing device is arranged at the opening, is connected with the output shaft and rotates around the output shaft;

wherein the handle device has at least:

the lower end of the shell is provided with a cylinder body, the installation cavity is formed in the cylinder body, and the lower end of the installation cavity is provided with an opening;

a control mechanism installed in the housing for controlling the operation of the driving device;

the left side and the right side of the shell are respectively provided with a first holding part and a second holding part, and the first holding part and the second holding part are distributed in a splayed shape;

when the hand is held, the large thenar part of the palm is completely attached to the upper end surfaces of the first holding part and the second holding part, and the output shaft of the driving device is arranged in the middle between the first holding part and the second holding part.

Preferably, the thickness of the front end of the first holding part and the thickness of the front end of the second holding part are smaller than the thickness of the rear end of each holding part.

Preferably, the first holding part and the second holding part are smoothly transited from the upper end to the lower end, and the parts of the first holding part and the second holding part, which are close to the cylinder, are inwards recessed to form a containing groove for containing the end parts of the fingers.

Preferably, the control mechanism includes:

a control board mounted above the driving device;

the button assembly is arranged at the front end of the first holding part and/or the second holding part and is electrically connected with the control panel;

while the palm is held, the fingers can press the button assembly to adjust the operation of the drive device.

Preferably, the button assembly includes:

a button seat installed in the housing;

the button plate is provided with a button switch and is electrically connected with the control panel;

the button key I is movably arranged on the button seat, and the rear end of the button key I is abutted against and presses the button switch;

the rear end of the button seat is provided with a slot, the button plate is vertically inserted in the slot, and the end part of the button plate is abutted against the shell for realizing fixation.

Preferably, a baffle plate for sealing is formed at the front end of the button seat, a first raised line and a second raised line are formed at the upper end of the baffle plate, and a clamping position is formed between the first raised line and the second raised line;

the button key I is provided with a forming chute;

after the first button key is installed at the clamping position, the first convex strip and the second convex strip are arranged in the sliding groove and move in the sliding groove to restrict the position of the first button key.

Preferably, the lower end of the partition plate is hinged with a second button, the rear end of the second button is abutted against a button switch of the button plate, and a reset spring is arranged on the second button and used for resetting the second button;

the second button is provided with a convex edge at the rear end, and a limiting groove is formed on the inner wall of the shell;

when the second button is pressed, the convex edge is pressed in the limiting groove for limiting the rotation of the second button.

Preferably, the polishing apparatus comprises

The middle part of the chassis is provided with an embedding seat, and a clamping hole is formed in the embedding seat;

the eccentric mechanism is arranged at the lower end of the output shaft, and a clamping piece is arranged at the end part of the rotating shaft in the eccentric mechanism;

when the end part of the rotating shaft is inserted into the clamping hole, the clamping piece is clamped with the clamping hole and is used for limiting the axial direction between the embedding seat and the rotating shaft;

meanwhile, under the action of the axial external force, the connection or separation between the rotating shaft and the embedded seat can be realized.

Preferably, the inner wall of the clamping hole is provided with a limiting groove;

the clamping piece is movably arranged at the end part of the rotating shaft, and part of the clamping piece protrudes out of the side wall of the rotating shaft;

when the end part of the rotating shaft is inserted into the clamping hole, the clamping piece slides into the limiting groove along the inner wall of the clamping hole, so that the axial limiting is realized.

Preferably, a pull rope is arranged on the base plate and used for pulling the base plate axially so as to separate the embedded seat from the rotating shaft.

Compared with the prior art, the invention has the following outstanding and beneficial technical effects:

1. the invention realizes double-hand holding by arranging the first holding part and the second holding part on the shell, the large thenar part of the palm is completely attached, meanwhile, the first holding part and the second holding part are distributed in a splayed shape, so that the design is more in accordance with the human engineering design, the holding part is more stable and comfortable to hold, and fatigue is not easy to generate.

After the first holding part and the second holding part are arranged at the same time, an output shaft of the driving device is arranged in the middle between the first holding part and the second holding part, and even if the point of applying pressure is the middle of the acting and polishing device, the effect of saving power can be achieved on one hand; on the other hand, the problem that the polishing effect is affected due to uneven stress of the polishing device can be avoided.

2. The thickness of the front end of the first holding part and the thickness of the front end of the second holding part are smaller than the thickness of the rear end of the first holding part, so that the holding stability and the holding comfort can be further ensured; on the other hand, the integral strength of the shell is ensured, the conditions of breakage and the like can not occur when pressure is applied, and the use safety is ensured.

3. The design of the accommodating groove can enable the outer volumes of the first holding part and the second holding part to be larger than the inner volumes, and the palm centers of the hands can be filled in the outer parts of the first holding part and the second holding part during holding, so that the influence on fingers is reduced, fatigue is avoided, and meanwhile, the holding is firmer.

4. The button assembly provided by the invention can be used for conveniently and freely adjusting the rotating speed in the polishing process, and the slot can be used for ensuring the convenience of installation.

5. The matching of the first raised strips and the second raised strips with the sliding grooves and the matching of the convex edges of the first button keys with the limiting grooves play a role in limiting the moving positions, and the phenomenon that the button plate and the button switch are damaged due to overlarge force is avoided.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic top structure of the present invention.

Fig. 3 is a sectional view in the direction B-B of fig. 2.

Fig. 4 is a schematic view of the structure of the bottom surface of the present invention.

Fig. 5 is a schematic view of a button assembly according to the present invention.

Fig. 6 is an exploded view of the button assembly of the present invention.

Fig. 7 is a sectional view in the direction A-A of fig. 2.

Fig. 8 is an enlarged view of region C of fig. 7.

Fig. 9 is a cross-sectional view of the polishing apparatus of the present invention.

Fig. 10 is an exploded view of the polishing apparatus of the present invention.

FIG. 11 is a schematic view of a nest structure of the present invention.

FIG. 12 is a schematic view of a portion of the mount of the present invention to a chassis.

Reference numerals:

100. a handle means; 101. a housing; 102. a cylinder; 103. a mounting cavity; 104. a control mechanism; 105. a first holding part; 106. a second holding part; 107. a receiving groove; 108. a control board; 109. a button assembly; 110. a button seat; 111. a button plate; 112. a push button switch; 113. a first button key; 114. a slot; 115. a partition plate; 116. a first convex strip; 117. a second protruding strip; 118. a clamping position; 119. a chute; 120. a second button key; 121. a convex edge; 122. a limiting groove;

200. a driving device; 201. an output shaft; 202. a motor; 203. an end cap; 204. a battery;

300. a polishing device; 301. a chassis; 302. a seat is embedded; 303. a clamping hole; 304. an eccentric mechanism; 305. a clamping piece; 306. a limit groove; 307. a pull rope; 308. a rotating shaft; 309. an ejector spring; 310. penetrating holes; 311. a boss.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, a dual grip polisher, comprising: the handle device 100, the driving device 200 and the polishing device 300, the handle device 100 comprising a housing 101 and a control mechanism 104.

The shell 101 comprises an upper shell 101 and a lower shell 101 which are spliced up and down, a cylinder 102 is formed on the lower shell 101, and an opening is formed at the lower end of a mounting cavity 103 formed in the cylinder 102; the driving device 200 is vertically installed in the installation cavity 103, and the output shaft 201 vertically protrudes downward from the installation cavity 103, and the polishing device 300 is disposed at the opening and connected to the end of the output shaft 201.

The control mechanism 104 is mounted within the housing 101 above the drive device 200.

A first holding portion 105 and a second holding portion 106 are formed on the left and right sides of the housing 101, respectively, and the first holding portion 105 and the second holding portion 106 are distributed in a splayed shape.

When the hand is held, the big thenar part at the rear end of the thumb of the palm is completely attached to the upper end surfaces of the first holding part 105 and the second holding part 106, and the distance between the thumbs is smaller than that between the thumbs, so that the hand is more in line with the engineering of human body, and the hand is more comfortable to hold and is not easy to generate fatigue.

Meanwhile, the output shaft 201 of the driving device 200 is disposed in the middle between the first holding portion 105 and the second holding portion 106, that is, when the output shaft 201 of the driving device 200 is located in the center of the point of application of the palm to the first holding portion 105 and the second holding portion 106.

It can also be interpreted that the points of application of the palm to the first grip portion 105 and the second grip portion 106 are substantially centered on the chassis 301 of the polishing apparatus 300.

According to the invention, the first 105 and the second 106 holding parts are arranged on the shell 101 to realize holding by two hands, the large thenar parts of the palms are completely attached, and meanwhile, the first 105 and the second 106 holding parts are distributed in a splayed manner, so that the invention is more in accordance with the ergonomic design, and the user can hold more stably and comfortably and is not easy to generate fatigue.

After the first holding part 105 and the second holding part 106 are arranged at the same time, the output shaft 201 of the driving device 200 is arranged in the middle between the first holding part 105 and the second holding part 106, even if the point of applying pressure is the middle of the acting and polishing device 300, on the one hand, the effect of saving power can be achieved; on the other hand, the problem that the polishing effect is affected due to uneven stress of the polishing device 300 can be avoided.

I.e. the force is uniformly dispersed from the center of the chassis 301 to the periphery, so that the pressure of the chassis 301 to the metal plate to be polished is uniform, thereby ensuring the polishing effect and avoiding the occurrence of scratches.

The thickness of the front end of the first holding part 105 and the thickness of the front end of the second holding part 106 are smaller than the thickness of the respective rear ends.

The thickness of the front end is smaller than that of the rear end, and the part which mainly plays a role in holding is the rear end and the force application point is the rear end when holding, so that the bearing capacity of the part can be improved due to the thicker rear end, the situation of fracture is avoided, and the use safety is ensured.

Meanwhile, the inner sides of the first holding part 105 and the second holding part 106 are integrally connected with the shell 101, so to speak, the shape of the holding part is directly formed on the shell 101, and the overall strength can be better, and the holding comfort of the rear end can be improved.

The upper end to the lower end of the first holding part 105 and the second holding part 106 are in smooth transition, that is, the outer part of the upper shell 101 and the outer part of the lower shell 101 are in smooth transition, the inner part is recessed upwards, and a containing groove 107 for containing the end part of the finger is formed in the part close to the cylinder 102 in an inward recessed way, so that the outer thickness is larger than the inner thickness.

When in holding, the outer parts of the holding part I105 and the holding part II 106 can be filled with the palm center of the palm, so that the influence on fingers is reduced, the fatigue is avoided, and the holding is firmer.

Meanwhile, in order to prevent slipping, anti-slip pads are arranged on the upper side of the first holding part 105 and the upper side of the second holding part 106, the anti-slip pads are attached to the palm center, slipping phenomenon can not occur when the user holds the anti-slip device to press down, and use safety is guaranteed.

As shown in fig. 3-8, the control mechanism 104 is configured as follows.

The control structure includes: control panel 108, display screen and button assembly 109, button assembly 109 comprises button housing 110, button panel 111, button key one 113 and button key two 120;

the control board 108 is a circuit board, and is mounted directly above the driving device 200, under the constraint of the cylinder 102, the cooling wind of the driving device 200 blows upwards, so as to cool the circuit board, and then is discharged from an air outlet on the side surface of the casing 101, and the display screen is mounted at the upper end of the control board 108 and is used for displaying information such as rotation speed, gear, electric quantity and the like.

A button assembly 109 is mounted at the front end of the housing 101. Namely, the button assembly 109 is installed at the front end of the first holding part 105 or the second holding part 106, or a group of button assemblies 109 are installed at the front ends of the first holding part 105 and the second holding part 106, and the button assemblies 109 are mainly responsible for the switch driving device 200, the rotation speed adjustment and the like.

The left and right groups can meet the requirement of users with the hands used by the users being left or right, and the use is convenient for the users.

The button assembly 109 of the present invention is provided to facilitate free adjustment of the rotational speed during polishing, while the socket 114 ensures ease of installation.

Wherein, the front ends of the first holding part 105 and the second holding part 106 are respectively provided with a mounting position for mounting the button assembly 109.

As shown in fig. 6, a slot 114 is formed at the rear end of the button seat 110, the button plate 111 is vertically inserted into the slot 114, and the upper and lower ends of the button plate 111 are respectively abutted against the upper and lower cases 101 and 101 for fixing. The button plate 111 is provided with a button switch 112 on each of the upper and lower sides. A partition plate 115 is formed at the front end of the button seat 110, a pin shaft is installed at the lower end of the partition plate 115, a second button key 120 is hinged on the spool, the rear end of the second button key 120 is abutted against the button switch 112 of the button plate 111, a reset spring is further arranged on the pin shaft, when the button seat does not rotate, the upper end of the second button key 120 is abutted against the lower end of the partition plate 115, and when the button seat rotates, the second button key 120 overcomes the reset spring to rotate around the pin shaft so as to trigger the button switch 112. The partition 115 can separate the first button 113 and the second button 120, and can fill up the gap on the casing 101, so as to ensure tightness and prevent external foreign matters from entering.

In order to ensure the rotation stability of the second button 120, the contact and contact part between the second button 120 and the button seat 110 is arranged in an arc shape, so as to ensure smooth rotation.

A first protruding strip 116 and a second protruding strip 117 are formed at the upper end of the separator 115, and a clamping position 118 is formed between the first protruding strip 116 and the second protruding strip 117;

the reason why the interval between the upper ends of the first raised strips 116 and the second raised strips 117 is smaller than that of the lower ends of the first raised strips 116 and the second raised strips 117 is that the first raised strips 116 or the second raised strips 117 are obliquely arranged, or arc-shaped, or the upper end of one convex edge 121 is formed with a bulge; the first push button 113 is formed with a chute 119, the first push button 113 is mounted in the clamping position 118 by external force, so that the first protruding strip 116 and the second protruding strip 117 are arranged in the chute 119 and move in the chute 119, and the limit movement position of the first push button 113 is that the first protruding strip 116 and the second protruding strip 117 are abutted against the side wall of the chute 119.

The rear end of the second button key 120 is provided with a convex edge 121, and the inner wall of the shell 101 is provided with a limiting groove 122;

after the second button 120 is pressed, the flange 121 is pressed against the limiting groove 122, so as to limit the rotation of the second button 120.

The cooperation of the first raised strip 116 and the second raised strip 117 with the sliding groove 119 and the cooperation of the convex edge 121 of the first button key 113 and the limiting groove 122 play a role in limiting the moving position, and the phenomenon that the button plate 111 and the button switch 112 are damaged due to excessive force is avoided.

[ modification 1 ]

In order to ensure the homing ability of the first button 113 and the second button 120, a spring may be added at the place where the first button 113 and the second button 120 are abutted against the button switch 112, and the homing ability of the first button 113 and the second button 120 is improved by using the spring.

As shown in fig. 9 to 12, the polishing apparatus 300 is structured as follows.

The polishing apparatus 300 includes: chassis 301 and eccentric mechanism 304;

the eccentric mechanism 304 is installed at the lower end of the output shaft 201, and mainly comprises a balance block, a bearing is installed in the balance block, a rotating shaft 308 is installed in the bearing, a connecting hole is arranged at the upper end of the balance block, the connecting hole is mainly used for connecting the output shaft 201, and the connecting hole is different from the rotating shaft 308, so that an eccentric structure is formed.

The lower end of the rotating shaft 308 is provided with a special shape, namely, a waist-shaped hole, a triangle, a square and the like;

the chassis 301 is mainly used for fixing a lamb wool tray or a cotton tray, etc., a mounting hole site is formed in the middle of the chassis 301, a seat insert 302 is mounted in the mounting hole site, a clamping hole 303 matched with the shape of the lower end of a rotating shaft 308 is formed in the seat insert 302, and when the rotating shaft 308 is inserted into the clamping hole 303 of the seat insert 302, radial limiting can be realized by matching the two holes, so that the chassis 301 can rotate along with the rotating shaft 308.

In order to prevent the chassis 301 from separating from the rotating shaft 308 during rotation and simultaneously achieve the purpose of quick disassembly and assembly, a quick disassembly structure is designed, specifically, a through hole is formed in the side wall of the lower end of the rotating shaft 308, the through hole penetrates through the side wall of the rotating shaft 308, the diameter of the end part of the through hole is reduced, a clamping piece 305 is installed in the through hole, the clamping piece 305 can be a ball or a clamping column, only a part of the clamping piece 305 can be protruded out of the through hole, and the through hole can be provided with an ejection spring 309, and the clamping piece 305 can be partially protruded out of the outer wall of the rotating shaft 308 under the action of the ejection spring 309 by using pins.

The limiting groove 306 is formed on the inner wall of the clamping hole 303, and the limiting groove 306 may be formed from the lower end surface of the insert seat 302 along the inner wall of the clamping hole 303 to the upper end surface.

During installation, the rotating shaft 308 is aligned with the clamping hole 303, and then the clamping piece 305 can slide into the limiting groove 306 by pressing the rotating shaft 308 and the clamping hole, so that the installation connection between the embedded seat 302 and the rotating shaft 308 can be realized.

The chassis 301 is mainly a rotational force in use, and there is no external force in a downward direction on the chassis 301, so that in a normal use state, the condition that the chassis 301 is separated from the rotating shaft 308 can not occur, the condition that the chassis 301 is thrown out in the using process can not occur, and the using safety is guaranteed.

When the small or larger chassis 301 needs to be replaced, only the downward force is applied to the chassis 301, the rotating shaft 308 is fixed or has upward external force, after a certain force is reached, the clamping piece 305 slides out of the limiting groove 306, at this time, the rotating shaft 308 is separated from the embedded seat 302, then the other chassis 301 is installed, the two are pressed by the external force, and the clamping piece 305 is clamped in the new limiting groove 306 again, so that the installation and replacement can be completed.

The existing design is that the rotating shaft 308 penetrates through the hole site in the middle of the chassis 301, then the fixing of the rotating shaft 308 and the chassis 301 is realized by utilizing nuts or bolts, the replacement is complex and time-consuming, and the quick separation and installation of the chassis 301 and the rotating shaft 308 can be realized under the action of certain external force, so that the use is simple, convenient and quick.

As shown in fig. 10, in order to more conveniently apply an external force to the chassis 301, a pull rope 307 is installed in the middle of the chassis 301, and the pull rope 307 may form a pull ring to facilitate the separation of the chassis 301 from the rotating shaft 308.

The reason for the drawstring 307 not being made of metal, such as iron wire, is to avoid the drawstring 307 damaging the polished surface of the belt during the polishing process.

Specifically, a plurality of through holes 310 may be symmetrically formed around the insert seat 302 in the middle of the chassis 301, then two ends of the pull rope 307 are respectively inserted into the corresponding through holes 310, and the end portions are provided with fixing portions, where the fixing portions may be formed by knotting the end portions or fixing a small metal pin, so as to ensure that the end portions of the pull rope 307 cannot be separated from the through holes 310.

When the chassis 301 needs to be replaced, only the stay 307 is pulled out, and the stay 307 is used for separating the chassis 301 and the rotating shaft 308; after replacement, the pulled pull rope 307 can move away from the center of the chassis 301 under the action of centrifugal force because the end part of the pull rope 307 is heavier in the rotating process of the chassis 301, so that the pull rope 307 is pulled back, the pull rope 307 is ensured not to protrude out of the lower end surface of the chassis, the surface to be polished is ensured not to be scratched, and the polishing effect is influenced.

The pull cord 307 is not particularly limited to nylon cord, but may be other soft cord-like objects.

The fixing structure between the nest 302 and the chassis 301 is as follows.

The nest 302 may be configured to be contoured to ensure that the nest 302 will rotate on the chassis 301 after being secured to the chassis 301.

As shown in fig. 12, at the same time, the end of the insert 302 is symmetrically formed with a boss 311, and when the insert 302 is mounted on the chassis 301, the chassis 301 is connected by using a screw, so that the tail end cap peak of the screw is overlapped on the boss 311, thereby realizing the connection and fixation of the insert 302 and the chassis 301.

The quick-dismantling structure can also be realized by adopting a magnetic attraction matching mode.

The drive device 200 includes a motor 202, a battery 204, and an end cap 203; an end cap 203 is mounted above the motor 202, and a lead frame is provided on the end cap 203 for connecting with the control board 108.

The battery 204 is mounted at the rear side of the shell, the position can not affect the holding of the hand, the space of the product is fully utilized, and the design of the holding part I and the holding part II is combined, so that the battery is miniaturized and light.

[ modification 2 ]

The insert 302 may be integrally formed with the chassis 301.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A dual grip handle polisher, comprising:

a handle device (100) having a mounting cavity (103) formed therein;

a driving device (200) vertically installed in the installation cavity (103);

a polishing device (300) which is disposed at the opening, is connected to the output shaft (201), and rotates around the output shaft (201);

wherein the handle device (100) has at least:

a shell (101) with a cylinder (102) formed at the lower end, a mounting cavity (103) formed in the cylinder (102) and an opening formed at the lower end;

a control mechanism (104) installed in the housing (101) for controlling the operation of the driving device (200);

the left side and the right side of the shell (101) are respectively provided with a first holding part (105) and a second holding part (106), and the first holding part (105) and the second holding part (106) are distributed in a splayed shape;

when the hand is held, the large thenar part of the palm is completely attached to the upper end surfaces of the first holding part (105) and the second holding part (106), and the output shaft (201) of the driving device (200) is arranged in the middle between the first holding part (105) and the second holding part (106);

the polishing apparatus (300) includes:

the chassis (301) is provided with a embedding seat (302) at the middle part, and a clamping hole (303) is formed in the embedding seat (302);

an eccentric mechanism (304) mounted on the lower end of the output shaft (201), wherein a clamping piece (305) is mounted on the end of a rotating shaft (308) in the eccentric mechanism (304);

when the end part of the rotating shaft (308) is inserted into the clamping hole (303), the clamping piece (305) is clamped with the clamping hole (303), the end part of the rotating shaft (308) is matched with the shape of the clamping hole (303), and radial limit can be realized by matching the rotating shaft (308) with the clamping hole (303), so that the chassis (301) can rotate along with the rotating shaft (308); the clamping piece (305) is matched with the clamping hole (303) and used for limiting the axial direction between the embedding seat (302) and the rotating shaft (308);

a pull rope (307) is arranged on the chassis (301); the pull rope (307) is used for pulling the chassis (301) axially to separate the embedded seat (302) from the rotating shaft (308); the pull rope (307) is a soft rope-shaped object.

2. The dual grip polisher of claim 1, wherein:

the thickness of the front end of the first holding part (105) and the thickness of the front end of the second holding part (106) are smaller than the thickness of the rear end of each holding part.

3. The double-grip polisher according to claim 1 or 2, wherein:

the upper ends of the first holding part (105) and the second holding part (106) are in smooth transition to the lower end, and the parts of the first holding part (105) and the second holding part (106) close to the cylinder body (102) are inwards recessed to form a containing groove (107) for containing the end parts of fingers.

4. The double-grip polisher according to claim 3,

the control mechanism (104) includes:

a control board (108) mounted above the drive device (200);

a button assembly (109) which is mounted on the front end of the first holding part (105) and/or the second holding part (106) and is electrically connected with the control board (108);

while the palm is held, the fingers can press the button assembly (109) to adjust the operation of the drive device (200).

5. The dual grip polisher according to claim 4,

the button assembly (109) comprises:

a button seat (110) mounted in the housing (101);

the button plate (111) is provided with a button switch (112) and is electrically connected with the control plate (108);

a first button (113) movably mounted on the button base (110), and having a rear end abutting against and pressing the button switch (112);

the rear end of the button seat (110) is provided with a slot (114), the button plate (111) is vertically inserted into the slot (114), and the end part of the button plate (111) is abutted against the shell (101) for realizing fixation.

6. The dual grip polisher of claim 5, wherein:

the front end of the button seat (110) is provided with a baffle plate (115) for sealing, the upper end of the baffle plate (115) is provided with a first raised line (116) and a second raised line (117), and a clamping position (118) is formed between the first raised line (116) and the second raised line (117);

a chute (119) is formed on the first button key (113);

after the button key one (113) is installed on the clamping position (118), the protruding strip one (116) and the protruding strip two (117) are arranged in the sliding groove (119) and move in the sliding groove (119) to restrict the position of the button key one (113).

7. The dual grip polisher of claim 6 wherein:

the lower end of the partition plate (115) is hinged with a second button (120), the rear end of the second button (120) is abutted against a button switch (112) of the button plate (111), and a reset spring is arranged on the second button (120) and used for resetting the second button (120);

the rear end of the button key II (120) is provided with a convex edge (121), and the inner wall of the shell (101) is provided with a limiting groove (122);

when the second button (120) is pressed, the convex edge (121) is pressed in the limiting groove (122) for limiting the rotation of the second button (120).

8. The dual grip polisher of claim 1, wherein:

the inner wall of the clamping hole (303) is provided with a limiting groove (306);

the clamping piece (305) is movably arranged at the end part of the rotating shaft (308), and part of the clamping piece (305) protrudes out of the side wall of the rotating shaft (308);

when the end part of the rotating shaft (308) is inserted into the clamping hole (303), the clamping piece (305) slides into the limiting groove (306) along the inner wall of the clamping hole (303), so that the axial limiting is realized.