CN114670100A

CN114670100A - Two handle formula burnishing machines of holding

Info

Publication number: CN114670100A
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: 2022-06-28
Anticipated expiration: 2042-03-18
Also published as: CN114670100B

Abstract

The invention relates to the technical field of handheld polishing machines, in particular to a double-handle polishing machine, which comprises: the handle device is internally provided with a mounting cavity in a forming way; 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, this handle device has at least: the lower end of the shell is formed with a cylinder body, the installation cavity is formed in the cylinder body, and the lower end of the cylinder body is provided with an opening; and the control mechanism is arranged in the shell and used for controlling the work of the driving device. According to the invention, the first holding part and the second holding part are arranged on the shell to realize holding by two hands, the thenar part of the palm is completely attached, and the first holding part and the second holding part are splayed, so that the ergonomic design is better met, and the problems that the polishing effect and the use safety are influenced due to the fact that the polishing pad is unstable to hold by one hand and is easy to use and fatigue are solved.

Description

Two handle formula burnishing machines of holding

Technical Field

The invention relates to the technical field of handheld polishing machines, in particular to a double-holding-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 act together and rub the surface to be polished, so that the aims of removing paint surface pollution, oxide layer and shallow mark can be achieved.

For example, patent 2019210858680 discloses a conventional polishing machine including a casing and a motor disposed in the casing, a balance block is fixedly connected to a rotating shaft of the motor, and the polishing machine is characterized in that a concave stirring groove is formed on a surface of one side of the balance block facing the motor, and an air outlet is formed in the casing.

The polishing machine is designed in such a way that the polishing machine is held by one handle and pressure is applied by the other hand to ensure the polishing effect; however, in the actual use process, once pressure is applied, torsion is generated at the handle part, unstable holding can easily occur when the user holds the polishing pad with one hand, even the pressure is too high, the holding is unstable, and the polishing pad is easy to fatigue after being used for a long time, so that the hand applying the pressure slides, the whole user slips, even the polishing pad collides with metal to be polished, and the use danger is caused.

Disclosure of Invention

The invention aims to provide a double-handle-holding type polishing machine which is characterized in that a first holding part and a second holding part are arranged on a shell to realize double-hand holding, the thenar part of a palm is completely attached, and the first holding part and the second holding part are splayed, so that the double-handle-holding type polishing machine is more in accordance with the ergonomic design, and the problems that the single-hand holding is unstable, the use is easy to fatigue, and the polishing effect and the use safety are influenced are solved.

The purpose of the invention is realized by the following steps:

a dual grip handle polisher comprising:

the handle device is internally provided with a mounting cavity in a forming way;

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, this handle device has at least:

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

the control mechanism is arranged in the shell and used for controlling the work 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 manner;

when the palm is held, the 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 both smaller than the thickness of the respective rear ends.

Preferably, the first holding part and the second holding part are in smooth transition 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 barrel, are recessed inwards to form accommodating grooves for accommodating the ends of fingers.

Preferably, the control mechanism comprises:

a control board installed 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 held by the palm of the hand, the fingers can press the button assembly to adjust the operation of the drive device.

Preferably, the button assembly includes:

a button seat mounted in the housing;

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

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

the rear end of the button seat is formed with a slot, the button plate is vertically inserted into the slot, and the end portion of the button plate is abutted to the shell and used for achieving fixation.

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

the first button key is provided with a forming chute;

when the first button key is installed on the clamping position, the first protruding strip and the second protruding strip are arranged in the sliding groove and move in the sliding groove to restrain the position of the first button key.

Preferably, the lower end of the partition board is hinged with a second button key, the rear end of the second button key is abutted against a button switch of the button board, and the second button key is provided with a return spring for returning the second button key;

The rear end of the button key II is formed with a convex edge, and the inner wall of the shell is formed with a limiting groove;

when the second button key is pressed, the convex edge is pressed in the limiting groove to limit the rotation of the second button key.

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 a 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 used for axial limiting between the embedding seat and the rotating shaft;

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

Preferably, a limiting groove is formed on the inner wall of the clamping hole;

the end part of the rotating shaft is movably provided with the clamping piece, 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 direction is limited.

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

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

1. according to the invention, the first holding part and the second holding part are arranged on the shell to realize holding by two hands, the thenar region of the palm is completely attached, and the first holding part and the second holding part are splayed and distributed, so that the ergonomic design is better met, and a user can hold more stably and comfortably without fatigue.

After the first holding part and the second holding part are arranged at the same time, the output shaft of the driving device is arranged in the middle between the first holding part and the second holding part, even if the point of applying pressure is the middle of the polishing device, on one hand, the effect of saving power can be achieved; on the other hand, the problem that the polishing effect is influenced 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 both smaller than the thickness of the respective rear ends, so that the holding stability and the holding comfort can be further ensured; on the other hand, the strength of the whole shell is guaranteed, the situations of fracture and the like are avoided when pressure is applied, and the use safety is guaranteed.

3. The design of the accommodating groove can ensure that the external volume of the first holding part and the second holding part is larger than the internal volume, and the external parts of the first holding part and the second holding part can fill the palm center of a palm when in holding, thereby reducing the influence on fingers, avoiding the use fatigue and simultaneously ensuring that the holding can be firmer.

4. The arrangement of the button assembly can facilitate free adjustment of the rotating speed in the polishing process, and meanwhile, the slot can ensure the convenience of installation.

5. The first raised line and the second raised line are matched with the sliding groove, and the raised edge of the first button key is matched with the limiting groove, so that the moving position is limited, and the phenomenon that the button plate and the button switch are damaged due to excessive force is avoided.

Drawings

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

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

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

Fig. 4 is a schematic structural diagram of the bottom surface of the present invention.

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

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

Fig. 7 is a sectional view taken along the line a-a of fig. 2.

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

Fig. 9 is a 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 the insert seat structure of the present invention.

Fig. 12 is a partial structural view of the mounting of the nest to the chassis of the present invention.

Reference numerals:

100. a handle device; 101. a housing; 102. a barrel; 103. a mounting cavity; 104. a control mechanism; 105. a first holding part; 106. a second holding part; 107. accommodating grooves; 108. a control panel; 109. a button assembly; 110. a button seat; 111. a button plate; 112. a push button switch; 113. pressing a first button; 114. a slot; 115. a partition plate; 116. a first convex strip; 117. a convex strip II; 118. clamping and connecting; 119. a chute; 120. a second button; 121. a convex edge; 122. a limiting groove;

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

300. a polishing device; 301. a chassis; 302. embedding a base; 303. a clamping hole; 304. an eccentric mechanism; 305. a clamping piece; 306. a limiting groove; 307. pulling a rope; 308. a rotating shaft; 309. ejecting a spring; 310. perforating holes; 311. and (4) a boss.

Detailed Description

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

As shown in fig. 1 to 4, a double-grip handle type polishing machine includes: a handle device 100, a driving device 200 and a polishing device 300, wherein the handle device 100 comprises a shell 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 an installation cavity 103 formed in the cylinder 102; the driving device 200 is vertically installed in the installation cavity 103, the output shaft 201 vertically extends out of the installation cavity 103 downwards, and the polishing device 300 is arranged at the opening and connected with the end part of the output shaft 201.

The control mechanism 104 is mounted in the housing 101 and above the driving device 200.

A first holding part 105 and a second holding part 106 are respectively formed on the left side and the right side of the shell 101, and the first holding part 105 and the second holding part 106 are distributed in a splayed manner.

When the hand-held electric tool is held, the 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 thumb is smaller than that between the small thumbs, so that the hand-held electric tool is more suitable for human engineering, is more comfortable to hold and is less prone to fatigue.

Meanwhile, 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, that is, the output shaft 201 of the driving device 200 is located at the center of the point of application of the palm to the first holding part 105 and the second holding part 106 when being pressed down.

It can also be explained that the point of application of the palm to the first grip 105 and the second grip 106 is substantially centered on the base plate 301 of the polishing apparatus 300.

According to the invention, the first holding part 105 and the second holding part 106 are arranged on the shell 101 to realize holding by two hands, the thenar part of the palm is completely attached, and the first holding part 105 and the second holding part 106 are splayed, so that the invention is more in line with the ergonomic design, and the user can hold more stably and comfortably without 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 polishing device 300, on 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.

That is, the force is uniformly diffused from the center of the base plate 301 to the periphery, so that the pressure of the base plate 301 on the metal plate to be polished is uniform, the polishing effect is ensured, and the scratch is avoided.

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 mainly playing the role of holding is the rear end and the force application point is the rear end when the hand-held electric tool is held, so that the bearing capacity of the part can be improved due to the thicker thickness of the 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, or the shape of the holding parts is directly formed on the shell 101, so that the overall strength is better, and the holding comfort at the rear end is better.

The first holding part 105 and the second holding part 106 are smoothly transited from the upper end to the lower end, that is, the outer part of the upper shell 101 and the outer part of the lower shell 101 are smoothly transited, the inner part is concave upwards, and a part close to the barrel 102 is concave inwards to form a containing groove 107 for containing the end part of a finger, so that the outer thickness is larger than the inner thickness.

When holding, the outer parts of the first holding part 105 and the second holding part 106 can be filled with the palm center of the palm, thereby reducing the influence on the fingers, avoiding the use fatigue and ensuring the holding to be firmer.

Meanwhile, for skid resistance, 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, and are attached to the palm, so that the phenomenon of skid is avoided when the hand-held hand tool is pressed, and the use safety is ensured.

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

The control structure includes: the display screen comprises a control panel 108, a display screen and a button assembly 109, wherein the button assembly 109 comprises a button seat 110, a button plate 111, a first button key 113 and a second button key 120;

wherein, the control panel 108 refers to a circuit board, which is installed right above the driving device 200, and under the constraint of the cylinder 102, the cooling wind of the driving device 200 blows upwards to cool the circuit board, and then is discharged from the air outlet on the side of the casing 101, and the display screen is installed on the upper end of the control panel 108 for displaying information such as the rotating speed, the gear, the electric quantity, and the like.

A button assembly 109 is mounted to the front end of the housing 101. Namely, a group of button assemblies 109 are mounted at the front ends of the first holding part 105 or the second holding part 106, or 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 opening and closing the driving device 200, adjusting the rotating speed and the like.

The left group and the right group can meet the requirement that the dominant hand is a left-hand or right-hand user, and the user can use the device conveniently.

The arrangement of the button assembly 109 of the present invention facilitates the free adjustment of the rotational speed during the polishing process, while the insertion groove 114 ensures the convenience 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, the rear end of the button holder 110 is formed with an insertion groove 114, the button plate 111 is vertically inserted into the insertion groove 114, and the upper and lower end portions of the button plate 111 abut against the upper and

lower cases

101 and 101, respectively, for fixation. The button plate 111 is provided with one button switch 112 at 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, the second button key 120 is hinged to the spool, the rear end of the second button key 120 abuts against the button switch 112 of the button plate 111, a return spring is further arranged on the pin shaft, when the second button key 120 does not rotate, the upper end of the second button key 120 abuts against the lower end of the partition plate 115, and when the second button key 120 rotates around the pin shaft by overcoming the return spring so as to trigger the button switch 112. The partition plate 115 can separate the first button key 113 from the second button key 120, and can fill up the gap in the housing 101, thereby ensuring the sealing performance and preventing foreign matters from entering.

In order to ensure the stability of the rotation of the second button key 120, the part of the second button key 120, which is contacted and abutted with the button seat 110, is set to be in an arc shape, so that the smooth rotation is ensured.

Forming a first convex strip 116 and a second convex strip 117 at the upper end of the partition plate 115, and forming a clamping position 118 between the first convex strip 116 and the second convex strip 117;

the distance between the upper ends of the first convex strips 116 and the second convex strips 117 is smaller than that between the lower ends of the first convex strips 116 and the second convex strips 117, so that the first convex strips 116 or the second convex strips 117 are obliquely arranged, or arc-shaped, or the upper end of one convex edge 121 is provided with a protrusion; a sliding groove 119 is formed in the first button key 113, the first button key 113 is installed in a clamping position 118 through external force, the first protruding strip 116 and the second protruding strip 117 are placed in the sliding groove 119 and move in the sliding groove 119, and the first protruding strip 116 and the second protruding strip 117 abut against the side wall of the sliding groove 119 at the limit moving position of the first button key 113.

A convex edge 121 is formed at the rear end of the second button key 120, and a limiting groove 122 is formed on the inner wall of the shell 101;

when the second button key 120 is pressed, the flange 121 abuts against the limiting groove 122 to limit the rotation of the second button key 120.

The cooperation of the first protrusion 116 and the second protrusion 117 with the sliding slot 119 and the cooperation of the flange 121 of the first button key 113 and the limiting slot 122 play a role in limiting the moving position, thereby avoiding the damage of the button plate 111 and the button switch 112 caused by excessive force.

[ modification 1 ]

In order to ensure the homing capability of the first button key 113 and the second button key 120, a spring can be added at the position where the first button key 113 and the second button key 120 abut against the button switch 112, and the homing capability of the first button key 113 and the second button key 120 can be improved by the spring.

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

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

the eccentric mechanism 304 is installed at the lower end of the output shaft 201, and mainly includes a balance block, in which a bearing is installed, a rotating shaft 308 is installed in the bearing, and 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 and the rotating shaft 308 are not coaxial, thereby forming an eccentric structure.

The lower end of the rotating shaft 308 is designed to be special-shaped, namely, the lower end can be in a shape of a waist-shaped hole, a triangle, a square and the like;

chassis 301 is mainly used for fixed lamb hair dish or cotton dish etc. at the middle part shaping installation hole site of chassis 301, an inlay seat 302 of installation in the installation hole site, and the shaping has the joint hole 303 with the adaptation of pivot 308 lower extreme shape on the inlay seat 302, and after pivot 308 inserted in the joint hole 303 of inlay seat 302, radial spacing can be realized to the cooperation between the two to make chassis 301 can follow pivot 308 and rotate.

In order to prevent the chassis 301 from being separated from the rotating shaft 308 in the rotating process and achieve the purpose of quick detachment and installation, a quick-release 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 portion 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, as long as the clamping piece can not fall out of the through hole and can partially protrude out of the through hole, then, an ejection spring 309 is installed in the through hole and fixed in the through hole by using a pin, and under the action of the ejection spring 309, the clamping piece 305 can partially protrude out of the outer wall of the rotating shaft 308.

A limiting groove 306 is formed in the inner wall of the engaging 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 engaging hole 303 to the upper end surface.

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

When the chassis 301 is used, the chassis 301 is mainly a rotating force, and the chassis 301 does not have an external force in a downward direction, so that the chassis 301 is not separated from the rotating shaft 308 in a normal use state, the chassis 301 is prevented from being thrown out in a use process, and the use safety is ensured.

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

The existing design is that the rotating shaft 308 penetrates through a hole position in the middle of the chassis 301, then the fixing of the rotating shaft 308 and the chassis 301 is realized by utilizing a nut or a bolt, the replacement is complex and time-consuming, the design can realize the quick separation and installation of the chassis 301 and the rotating shaft 308 under the action of certain external force, and 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 at the middle portion 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 not using metal, such as iron wire, for the pull cord 307 is to avoid a situation where the pull cord 307 may damage the belt polishing surface during polishing.

Specifically, a plurality of through holes 310 may be symmetrically formed around the insert 302 in the middle of the chassis 301, and then the two ends of the pulling rope 307 are respectively inserted into the corresponding through holes 310, and the end portions are provided with fixing portions, which may be formed by knotting the end portions or fixing a small metal pin, to ensure that the end portion of the pulling rope 307 does not separate from the through holes 310.

When the chassis 301 needs to be replaced, the pull rope 307 is pulled out, and the chassis 301 and the rotating shaft 308 are separated by using the pull rope 307; after the change finishes, the stay cord 307 of pulling out can be at the rotatory in-process of chassis 301, because stay cord 307 tip is heavier, can remove to keeping away from chassis 301 center under the effect of centrifugal force to pull back stay cord 307, guarantee that stay cord 307 can not bulge the lower terminal surface on chassis, guarantee that can not the fish tail treat the polishing surface, influence polishing effect.

The pull rope 307 is not limited to a nylon rope, but may be other flexible rope-like objects.

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

The insert 302 may be shaped to ensure that the insert 302 will rotate on the chassis 301 after being fixed to the chassis 301.

As shown in fig. 12, at the same time, bosses 311 are symmetrically formed at the end of the insert seat 302, and after the insert seat 302 is mounted on the chassis 301, the chassis 301 is connected by screws, so that the visor at the tail end of the screw is lapped on the bosses 311, thereby realizing the connection and fixation of the insert seat 302 and the chassis 301.

The quick-release structure can also be realized in a magnetic attraction matching mode.

The driving device 200 comprises a motor 202, a battery 204 and an end cover 203; the end cover 203 is installed above the motor 202, and a lead wire seat is arranged on the end cover 203 and used for connecting the control board 108.

The battery 204 is arranged at the rear side of the shell, the hand holding is not influenced at the position, the space of the product is fully utilized, and the design of the first holding part and the second holding part is combined, so that the battery is miniaturized and lightened.

[ modification 2 ]

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

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a two handle formula burnishing machines which comprises:

a handle device (100) in which a mounting cavity (103) is formed;

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

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

wherein the handle device (100) at least comprises:

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

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

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

when the palm is held, the thenar part of the palm is completely attached to the upper end faces 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).

2. The double-grip handle polisher in accordance with claim 1 with the following features:

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.

3. The double-grip handle type polishing machine according to claim 1 or 2, wherein:

the upper end of the first holding part (105) and the lower end of the second holding part (106) are in smooth transition, and the parts, close to the barrel body (102), of the first holding part (105) and the second holding part (106) are recessed inwards to form accommodating grooves (107) for accommodating finger ends.

4. The dual-grip polishing machine of claim 3,

the control mechanism (104) includes:

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

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

5. The double-grip handle polishing machine according to claim 4,

the button assembly (109) includes:

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 panel (108);

a first button key (113) which is movably mounted on the button base (110) and whose rear end abuts against and presses the button switch (112);

the rear end of the button seat (110) is formed with an insertion groove (114), the button plate (111) is vertically inserted into the insertion groove (114), and the end of the button plate (111) abuts against the shell (101) for fixation.

6. The double-grip handle polishing machine according to claim 5, wherein:

a partition plate (115) for sealing is formed at the front end of the button seat (110), a first convex strip (116) and a second convex strip (117) are formed at the upper end of the partition plate (115), and a clamping position (118) is formed between the first convex strip (116) and the second convex strip (117);

A sliding groove (119) is formed in the first button key (113);

when the first button key (113) is installed on the clamping position (118), the first protruding strip (116) and the second protruding strip (117) are arranged in the sliding groove (119) and move in the sliding groove (119) and are used for restraining the position of the first button key (113).

7. The dual-grip handle polisher in accordance with claim 6 with the following features:

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

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

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

8. The double-grip handle polishing machine according to any one of claims 1 or 2 or 4 to 7,

the polishing apparatus (300) comprises

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

an eccentric mechanism (304) which is installed at the lower end of the output shaft (201), wherein a clamping piece (305) is installed at the end part 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) and used for axial limiting between the embedded seat (302) and the rotating shaft (308);

meanwhile, under the action of axial external force, the connection or separation between the rotating shaft (308) and the embedding seat (302) can be realized.

9. The dual-grip handle polisher in accordance with claim 8 with the following features:

a limiting groove (306) is formed in the inner wall of the clamping hole (303);

the clamping piece (305) is movably mounted 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.

10. The double-grip handle polisher in accordance with claim 1 with the following features:

the base plate (301) is provided with a pull rope (307) which is used for axially pulling the base plate (301) to separate the embedded seat (302) from the rotating shaft (308).