CN112139937A

CN112139937A - Automatic equipment of polishing in cylindricality timber surface

Info

Publication number: CN112139937A
Application number: CN202011096169.3A
Authority: CN
Inventors: 王宽钱
Original assignee: Ningbo Saha Machinery Technology Co ltd
Current assignee: Ningbo Saha Machinery Technology Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2020-12-29

Abstract

The invention relates to the field related to wood processing, in particular to automatic polishing equipment for the surface of cylindrical wood, which comprises an equipment body and a transverse moving cavity which is arranged in the equipment body and is provided with an upward opening, wherein the front end wall and the rear end wall of the transverse moving cavity are symmetrically provided with first sliding blocks which extend into the transverse moving cavity in a sliding manner, a transverse moving platform which is positioned in the transverse moving cavity is fixedly arranged between the front first sliding block and the rear first sliding block, a first transmission cavity is arranged in the transverse moving platform, and a second transmission cavity which is positioned on the left side of the transverse moving cavity is arranged in the equipment body. The practicability of the equipment is improved.

Description

Automatic equipment of polishing in cylindricality timber surface

Technical Field

The invention relates to the field related to wood processing, in particular to automatic polishing equipment for a cylindrical wood surface.

Background

The wood is widely applied in our life, a plurality of processing devices also exist for the processing mode of the wood, the polishing device is one of the commonly used devices, the surface of the wood is polished, burrs on the surface of the wood can be removed, the surface of the wood is leveled, and the wood has better usability.

Disclosure of Invention

The invention aims to provide automatic polishing equipment for the surface of cylindrical wood, which can overcome the defects in the prior art, so that the practicability of the equipment is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a cylindrical wood surface automatic grinding device, which comprises a machine body and a transverse moving cavity which is arranged in the machine body and is provided with an upward opening, wherein the front end wall and the rear end wall of the transverse moving cavity are symmetrically provided with first sliding blocks extending into the transverse moving cavity in a front-back sliding manner, a transverse moving platform which is arranged in the transverse moving cavity is fixedly arranged between the front first sliding block and the rear first sliding block, a first transmission cavity is arranged in the transverse moving platform, a second transmission cavity which is arranged at the left side of the transverse moving cavity is arranged in the machine body, the right end wall of the second transmission cavity is rotatably provided with a first rotating shaft which penetrates through the first transmission cavity and extends to the right end wall of the transverse moving cavity, the left end of the first rotating shaft is fixedly provided with a first bevel gear which is arranged in the second transmission cavity, and a first belt pulley which is arranged at the middle part of the, the outer surface of the first rotating shaft is fixedly provided with a second bevel gear positioned in the first transmission cavity, the traverse table is provided with a polishing device positioned on the upper side of the traverse chamber in a carrying manner, the polishing device comprises third transmission cavities which are symmetrically arranged in the traverse table in the front-back direction and positioned on the front side and the rear side of the first transmission cavity, the bottom wall of the third transmission cavity is rotatably provided with a first sleeve shaft extending upwards to the upper side of the traverse table, the outer surface of the first sleeve shaft is fixedly provided with a third bevel gear positioned in the third transmission cavity, the end wall of the third transmission cavity is rotatably provided with a polishing belt extending into the first transmission cavity, the end surface of the polishing belt close to the first sleeve shaft is fixedly provided with a fourth bevel gear positioned in the third transmission cavity and meshed with the third bevel gear, and the other end of the polishing belt is fixedly provided with a fifth bevel gear positioned in the first transmission cavity and meshed with the second bevel gear, the first sleeve shaft is internally provided with a lifting shaft extending to the upper side of the first sleeve shaft in a matching way, the first sleeve shaft drives the lifting shaft to move up and down when rotating, a transverse shaft is fixedly arranged at the top between the front lifting shaft and the rear lifting shaft, the outer surface of the middle part of the cross shaft is fixedly provided with a fixed plate, the outer surface of the cross shaft is provided with second sliding blocks which are symmetrically arranged at the front side and the rear side of the fixed plate in a sliding way, the second sliding block is connected with the fixed plate through a spring, the bottom end of the second sliding block is fixedly provided with a fixed rod, the bottom end of the fixed rod is provided with a spring rod in a spring connection way, the bottom end of the spring rod is fixedly provided with a first bracket, a roller shaft is rotatably arranged in the first support, rollers are fixedly arranged on the outer surface of the roller shaft, a polishing belt is arranged between the front roller and the rear roller in a matching connection manner, when the roller rotates, the grinding belt is driven to rotate, so that the grinding belt can grind a curved surface; the top wall of the machine body is fixedly provided with clamping and rotating mechanisms which are bilaterally symmetrical and are positioned on two sides of the transverse moving cavity, and the clamping and rotating mechanisms clamp the wood to be processed and enable the wood to rotate; the machine body is internally provided with a transmission device which is positioned in the second transmission cavity and at the rear side of the polishing device and is arranged in the machine body, and the transmission device is used for transmitting power to the clamping and rotating mechanism and the polishing device.

Further, the clamping and rotating mechanism comprises a stand column fixedly arranged on the top wall of the machine body and located on the left side and the right side of the transverse moving cavity, a second support is fixedly arranged on the top end of the stand column, a second rotating shaft is arranged inside the second support in a rotating mode, a friction wheel is fixedly arranged on the outer surface of the second rotating shaft, a second belt wheel is fixedly arranged on the end face of the second rotating shaft, the second belt wheel is connected with a third belt wheel fixedly arranged on the outer surface of the transverse moving cavity in a matched mode through a first belt, the polishing device further comprises a cantilever arranged on the front end wall and the rear end wall of the stand column in a hinged mode, a clamping wheel is arranged on the end face of the cantilever in a rotating mode, and a torsion spring is arranged.

Further, the transmission device comprises a motor arranged in the machine body and positioned at the front side of the second transmission cavity, an output shaft of the motor extends to the rear end wall of the second transmission cavity, a first spline shaft positioned in the second transmission cavity is arranged on the outer surface of the output shaft in a spline fit manner, a sixth bevel gear which is positioned in the second transmission cavity and can be meshed with the first bevel gear is fixedly arranged at the front end of the first spline shaft, a seventh bevel gear which is positioned at the rear side of the sixth bevel gear and can be meshed with the first bevel gear is fixedly arranged on the outer surface of the first spline shaft, an air cylinder positioned at the rear side of the second transmission cavity is arranged in the machine body, a piston rod which extends into the second transmission cavity and is intersected with the first spline shaft is arranged in the air cylinder in a sliding manner, and a fourth transmission cavity which is arranged in the machine body, positioned at the rear side of the transverse shifting cavity and is opened forwards, a third rotating shaft positioned at the rear side of the transverse moving cavity is rotatably arranged on the front and rear end walls of the fourth transmission cavity, a fourth rotating shaft positioned at the upper side of the third rotating shaft is rotatably arranged on the front and rear end walls of the fourth transmission cavity, a fourth belt wheel connected with the first belt wheel through a second belt is fixedly arranged on the outer surface of the third rotating shaft, a fifth belt wheel positioned at the rear side of the fourth belt wheel is fixedly arranged on the outer surface of the third rotating shaft, a sixth belt wheel connected with the fifth belt wheel through a third belt is fixedly arranged on the upper side of the fifth belt wheel on the outer surface of the fourth rotating shaft, the same third sliding block is slidably arranged on the outer surfaces of the third rotating shaft and the fourth rotating shaft, a second spline shaft in spline fit with the fourth rotating shaft is rotatably arranged in the third sliding block on the upper side, and an eighth bevel gear positioned in the third sliding block is fixedly arranged on the outer surface of the second spline shaft, the third slide block at the lower side and the third slide block at the upper side are arranged in the same way, a fifth rotating shaft between the third rotating shaft and the fourth rotating shaft is arranged between the two third slide blocks in a rotating way, a ninth bevel gear which is positioned in the third slide block and is meshed with the eighth bevel gear is fixedly arranged on the end surface of the fifth rotating shaft, a fourth slide block is arranged on the outer surface of the fifth rotating shaft in a sliding way, a third spline shaft which is in spline fit with the fifth rotating shaft is arranged in the fourth slide block in a rotating way, a tenth bevel gear which is positioned in the fourth slide block is fixedly arranged on the outer surface of the third spline shaft, a second sleeve shaft which is arranged at the position of the roller shaft and extends to the rear side is arranged on the front end surface of the fourth slide block in a rotating way, and an eleventh bevel gear which is meshed with the tenth bevel gear and is positioned in the fourth slide, a sixth rotating shaft is arranged in the second sleeve shaft in a spline fit mode, an Itoer twelfth bevel gear is fixedly arranged on the end face of the sixth rotating shaft, a sleeve mutually fixed with the first support on the rear side is rotatably arranged on the outer surface of the sixth rotating shaft, and a thirteenth bevel gear meshed with the twelfth bevel gear is fixedly arranged at the right end of the roller shaft on the rear side.

The invention has the beneficial effects that: the automatic polishing equipment for the surface of the cylindrical wood can automatically polish the surface of the cylindrical wood, drives the wood to rotate while clamping the wood, enables the wood to be polished better, enables the equipment to have better processing performance, enables the cylindrical surface to be polished in a good contact mode by using a belt-shaped polishing mode, and improves the practicability of the equipment.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of an automatic cylindrical wood surface grinding apparatus according to the present invention;

FIG. 2 is a schematic view of the structure A-A of FIG. 1;

FIG. 3 is a schematic diagram of B-B of FIG. 2;

FIG. 4 is a schematic diagram of the structure of C-C in FIG. 2;

fig. 5 is a schematic diagram of the structure of D-D in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

With reference to fig. 1-5, the automatic grinding device for cylindrical wood surfaces comprises a machine body 10 and a traverse chamber 12 arranged inside the machine body 10 and having an upward opening, wherein front and rear end walls of the traverse chamber 12 are symmetrically provided with first sliding blocks 47 extending into the traverse chamber 12 in a front-rear sliding manner, a traverse table 15 located inside the traverse chamber 12 is fixedly arranged between the front and rear first sliding blocks 47, a first transmission chamber 16 is arranged inside the traverse table 15, a second transmission chamber 13 located on the left side of the traverse chamber 12 is arranged inside the machine body 10, a first rotating shaft 19 extending through the first transmission chamber 16 to the right end wall of the traverse chamber 12 is rotatably arranged on the right end wall of the second transmission chamber 13, a first bevel gear 21 located inside the second transmission chamber 13 is fixedly arranged on the left end of the first rotating shaft 19, and an outer surface of the first rotating shaft 19 is fixedly provided with a first bevel gear 21 located inside the second transmission chamber 13 and located on the first bevel gear 21 The first belt pulley 20 with multiple cheeks, the outer surface of the first rotating shaft 19 is fixedly provided with a second bevel gear 18 positioned in the first transmission cavity 16, the traverse table 15 is provided with a grinding device 82 positioned on the upper side of the traverse table 12, the grinding device 82 comprises third transmission cavities 44 which are symmetrically arranged in the traverse table 15 in the front-back direction and positioned on the front side and the rear side of the first transmission cavity 16, the bottom wall of each third transmission cavity 44 is rotatably provided with a first sleeve shaft 38 extending upwards to the upper side of the traverse table 15, the outer surface of each first sleeve shaft 38 is fixedly provided with a third bevel gear 45 positioned in the third transmission cavity 44, the end wall of each third transmission cavity 44 is rotatably provided with a grinding belt 43 extending into the first transmission cavity 16, the end surface of each grinding belt 43 close to the first sleeve shaft 38 is fixedly provided with a fourth bevel gear 46 positioned in the third transmission cavity 44 and meshed with the third bevel gear 45, the other end of the polishing belt 43 is fixedly provided with a fifth bevel gear 17 which is positioned in the first transmission cavity 16 and engaged with the second bevel gear 18, the first sleeve shaft 38 is internally provided with a lifting shaft 39 extending to the upper side of the first sleeve shaft 38 in a matching manner, the first sleeve shaft 38 drives the lifting shaft 39 to move up and down when rotating, a cross shaft 35 is fixedly arranged at the top between the front lifting shaft 39 and the rear lifting shaft 39 together, a fixing plate 34 is fixedly arranged on the outer surface of the middle part of the cross shaft 35, second sliders 40 which are symmetrically positioned on the front side and the rear side of the fixing plate 34 are slidably arranged on the outer surface of the cross shaft 35, the second sliders 40 are connected with the fixing plate 34 through springs, a fixing rod 41 is fixedly arranged at the bottom end of the second slider 40, a spring rod 42 is spring-connected to the bottom end of the, a roller shaft 32 is rotatably arranged in the first support 31, a roller 33 is fixedly arranged on the outer surface of the roller shaft 32, a polishing belt 43 is arranged between the front roller 33 and the rear roller 33 in a matching connection mode, and the roller 33 drives the polishing belt 43 to rotate when rotating so that the polishing belt 43 can polish a curved surface; the top wall of the machine body 10 is fixedly provided with clamping rotating mechanisms 81 which are bilaterally symmetrical and are positioned at two sides of the traverse moving cavity 12, and the clamping rotating mechanisms 81 clamp wood to be processed and enable the wood to rotate; the machine body 10 is internally provided with a transmission device 83 which is positioned inside the second transmission cavity 13 and behind the grinding device 82 and is arranged in the machine body 10, and the transmission device 83 transmits power to the clamping and rotating mechanism 81 and the grinding device 82.

Beneficially, the clamping rotating mechanism 81 includes an upright post 25 fixedly disposed on the top wall of the machine body 10 and located on the left and right sides of the traverse chamber 12, a second support 28 is fixedly disposed on the top end of the upright post 25, a second rotating shaft 71 is rotatably disposed inside the second support 28, a friction wheel 29 is fixedly disposed on the outer surface of the second rotating shaft 71, a second pulley 72 is fixedly disposed on the end surface of the second rotating shaft 71, the second pulley 72 is cooperatively connected with a third pulley 14 fixedly disposed on the outer surface of the traverse chamber 12 through a first belt 73, the polishing device 82 further includes a cantilever 26 hinged on the front and rear end walls of the upright post 25, a clamping wheel 27 is rotatably disposed on the end surface of the cantilever 26, and a torsion spring is disposed at the interface between the cantilever 26 and the upright post 25 to ensure that the clamping wheel 27 can clamp wood.

Advantageously, the transmission 83 includes an electric motor 11 disposed inside the machine body 10 and located in front of the second transmission chamber 13, an output shaft 22 of the electric motor 11 extends to a rear end wall of the second transmission chamber 13, an outer surface of the output shaft 22 is spline-fitted with a first spline shaft 69 located inside the second transmission chamber 13, a front end of the first spline shaft 69 is fixedly disposed with a sixth bevel gear 70 located inside the second transmission chamber 13 and engageable with the first bevel gear 21, an outer surface of the first spline shaft 69 is fixedly disposed with a seventh bevel gear 23 located behind the sixth bevel gear 70 and engageable with the first bevel gear 21, an air cylinder 67 located behind the second transmission chamber 13 is disposed inside the machine body 10, a piston rod 68 extending into the second transmission chamber 13 and engageable with the first spline shaft 69 is slidably disposed inside the air cylinder 67, the transmission device 83 further includes a fourth transmission cavity 30 disposed inside the machine body 10 and located behind the traverse cavity 12 and opened forward, a third rotation shaft 48 disposed behind the traverse cavity 12 is rotatably disposed on front and rear end walls of the fourth transmission cavity 30, a fourth rotation shaft 49 disposed above the third rotation shaft 48 is rotatably disposed on front and rear end walls of the fourth transmission cavity 30, a fourth pulley 60 cooperatively connected with the first pulley 20 via a second belt 24 is fixedly disposed on an outer surface of the third rotation shaft 48, a fifth pulley 61 disposed behind the fourth pulley 60 is fixedly disposed on an outer surface of the third rotation shaft 48, a sixth pulley 58 cooperatively connected with the fifth pulley 61 via a third belt 59 is fixedly disposed on an upper side of the fifth pulley 61, and the same third slider 62 is slidably disposed on outer surfaces of the third rotation shaft 48 and the fourth rotation shaft 49, a second spline shaft 63 in spline fit with the fourth rotating shaft 49 is rotatably arranged inside the third slider 62 at the upper side, an eighth bevel gear 64 positioned in the third slider 62 is fixedly arranged on the outer surface of the second spline shaft 63, the third slider 62 at the lower side is arranged in the same way as the third slider 62 at the upper side, a fifth rotating shaft 50 positioned between the third rotating shaft 48 and the fourth rotating shaft 49 is rotatably arranged between the two third sliders 62, a ninth bevel gear 65 engaged with the eighth bevel gear 64 and positioned in the third slider 62 is fixedly arranged on the end surface of the fifth rotating shaft 50, a fourth slider 51 is slidably arranged on the outer surface of the fifth rotating shaft 50, a third spline shaft 57 in spline fit with the fifth rotating shaft 50 is rotatably arranged inside the fourth slider 51, and a tenth bevel gear 56 positioned in the fourth slider 51 is fixedly arranged on the outer surface of the third spline shaft 57, a second sleeve shaft 54 extending to the rear side of the drum shaft 32 is rotatably arranged on the front end surface of the fourth slider 51, an eleventh bevel gear 55 engaged with the tenth bevel gear 56 and positioned in the fourth slider 51 is fixedly arranged on the rear end of the second sleeve shaft 54, a sixth rotating shaft 52 is arranged in the second sleeve shaft 54 in a spline fit manner, an illicit-type twelfth bevel gear 37 is fixedly arranged on the end surface of the sixth rotating shaft 52, a sleeve 53 mutually fixed with the first bracket 31 on the rear side is rotatably arranged on the outer surface of the sixth rotating shaft 52, and a thirteenth bevel gear 36 engaged with the twelfth bevel gear 37 is fixedly arranged on the right end of the drum shaft 32 on the rear side.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

Sequence of mechanical actions of the whole device: in the initial state, the seventh bevel gear 23 is engaged with the first bevel gear 21, the sixth bevel gear 70 is not engaged with the first bevel gear 21, and the lifting shaft 39 is lifted.

When the device of the invention is in operation, after wood is placed on the friction wheel 29, the clamping wheel 27 clamps the wood, the motor 11 is started to drive the output shaft 22 to rotate, thereby driving the seventh bevel gear 23 to rotate, thereby driving the first bevel gear 21 to rotate, thereby driving the first rotating shaft 19 to rotate in a forward direction, thereby driving the third belt wheel 14 to rotate, thereby driving the second rotating shaft 71 to rotate, thereby driving the friction wheel 29 to rotate in a self-rotation manner, the first rotating shaft 19 drives the traverse table 15 to move in a right direction when rotating in a forward direction, the first rotating shaft 19 drives the fifth bevel gear 17 to rotate in a forward direction, thereby driving the polishing belt 43 to rotate in a forward direction, thereby driving the fourth bevel gear 46 to rotate in a forward direction, thereby driving the third bevel gear 45 to rotate in a forward direction, thereby driving the first sleeve 38 to rotate in a forward direction, thereby driving the lifting shaft 39 to move downwards so that the polishing belt 43 can be attached to the surface of the wood, when the first rotating shaft 19 rotates, the first belt pulley 20 is driven to rotate, so that the fourth belt pulley 60 is driven to rotate, so that the third rotating shaft 48 is driven to rotate, so that the fifth belt pulley 61 is driven to rotate, so that the fourth rotating shaft 49 is driven to synchronously rotate, so that the second spline shaft 63 is driven to rotate, so that the eighth bevel gear 64 is driven to rotate, so that the ninth bevel gear 65 is driven to rotate, so that the fifth rotating shaft 50 is driven to rotate, so that the third spline shaft 57 is driven to rotate, so that the tenth bevel gear 56 is driven to rotate, so that the eleventh bevel gear 55 is driven to rotate, so that the second sleeve shaft 54 is driven to rotate, so that the sixth rotating shaft 52 is driven to rotate, so that the twelfth bevel gear 37 is driven to rotate, so that the thirteenth bevel gear 36 is driven to rotate, so that the roller shaft 32 is driven to rotate, the cylinder 33 is rotated to drive the fixing plate 34 to rotate and polish the surface of the wood, the traversing table 15 moves to the right and simultaneously the fixing plate 34 can polish the surface of the wood completely in cooperation with the rotation of the wood, and the cylinder 67 controls the piston rod 68 to move backwards so that the sixth bevel gear 70 is engaged with the first bevel gear 21, so that the device can return to the initial state.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an automatic equipment of polishing in cylindricality timber surface, includes the organism and sets up the sideslip chamber of the inside upwards opening of organism, its characterized in that: the front end wall and the rear end wall of the transverse moving cavity are symmetrically provided with first sliding blocks extending into the transverse moving cavity in a front-back sliding mode, a transverse moving platform located in the transverse moving cavity is fixedly arranged between the front sliding block and the rear sliding block, a first transmission cavity is arranged in the transverse moving platform, a second transmission cavity located on the left side of the transverse moving cavity is arranged in the machine body, a first rotating shaft penetrating through the first transmission cavity and extending to the right end wall of the transverse moving cavity is rotatably arranged on the right end wall of the second transmission cavity, a first bevel gear located in the second transmission cavity is fixedly arranged at the left end of the first rotating shaft, a first belt pulley located in the second transmission cavity and located at the extreme of the first bevel gear is fixedly arranged on the outer surface of the first rotating shaft, a second bevel gear located in the first transmission cavity is fixedly arranged on the outer surface of the first rotating shaft, and a polishing device located on the upper side of, the polishing device comprises third transmission cavities which are symmetrically arranged in the transverse moving table in the front-back direction and are positioned on the front side and the rear side of the first transmission cavity, a first sleeve shaft which extends upwards to the upper side of the transverse moving table is rotatably arranged on the bottom wall of the third transmission cavity, a third bevel gear which is positioned in the third transmission cavity is fixedly arranged on the outer surface of the first sleeve shaft, a polishing belt which extends into the first transmission cavity is rotatably arranged on the end wall of the third transmission cavity, a fourth bevel gear which is positioned in the third transmission cavity and is meshed with the third bevel gear is fixedly arranged on the end surface of the polishing belt which is close to the first sleeve shaft, a fifth bevel gear which is positioned in the first transmission cavity and is meshed with the second bevel gear is fixedly arranged on the other end of the polishing belt, a lifting shaft which extends to the upper side of the first sleeve shaft is arranged in a matching manner inside the first sleeve shaft, and the first sleeve shaft drives the lifting shaft to move, a cross shaft is fixedly arranged at the top between the front lifting shaft and the rear lifting shaft, a fixed plate is fixedly arranged on the outer surface of the middle part of the cross shaft, second sliding blocks which are symmetrically arranged on the front side and the rear side of the fixed plate are arranged on the outer surface of the cross shaft in a sliding manner, the second sliding blocks are connected with the fixed plate through springs, a fixed rod is fixedly arranged at the bottom end of each second sliding block, a spring rod is arranged at the bottom end of each fixed rod in a spring connection manner, a first support is fixedly arranged at the bottom end of each spring rod, a roller shaft is rotatably arranged in the first support, a roller is fixedly arranged on the outer surface of the roller shaft, a polishing belt is arranged between the front roller and the rear roller and is; the top wall of the machine body is fixedly provided with clamping and rotating mechanisms which are bilaterally symmetrical and are positioned on two sides of the transverse moving cavity, and the clamping and rotating mechanisms clamp the wood to be processed and enable the wood to rotate; the machine body is internally provided with a transmission device which is positioned in the second transmission cavity and at the rear side of the polishing device and is arranged in the machine body, and the transmission device is used for transmitting power to the clamping and rotating mechanism and the polishing device.

2. An automatic grinding apparatus for cylindrical wood surfaces according to claim 1, characterized in that: the clamping and rotating mechanism comprises a machine body top wall and stand columns arranged on the left side and the right side of the transverse moving cavity, a second support is fixedly arranged on the top end of each stand column, a second rotating shaft is arranged on the inner portion of each second support in a rotating mode, a friction wheel is arranged on the outer surface of each second rotating shaft in a fixed mode, a second belt wheel is fixedly arranged on the end face of each second rotating shaft, the second belt wheel is connected with a third belt wheel on the outer surface of the transverse moving cavity in a matched mode through a first belt and a fixed mode, the polishing device further comprises cantilevers arranged on the front end wall and the rear end wall of each stand column in an articulated mode, clamping wheels are arranged on the end faces of the cantilevers in a rotating mode, and.

3. An automatic grinding apparatus for cylindrical wood surfaces according to claim 1, characterized in that: the transmission device comprises a motor which is arranged in the machine body and positioned at the front side of the second transmission cavity, an output shaft of the motor extends to the rear end wall of the second transmission cavity, a first spline shaft which is positioned in the second transmission cavity is arranged on the outer surface of the output shaft in a spline fit mode, a sixth bevel gear which is positioned in the second transmission cavity and can be meshed with the first bevel gear is fixedly arranged at the front end of the first spline shaft, a seventh bevel gear which is positioned at the rear side of the sixth bevel gear and can be meshed with the first bevel gear is fixedly arranged on the outer surface of the first spline shaft, an air cylinder which is positioned at the rear side of the second transmission cavity is arranged in the machine body, a piston rod which extends into the second transmission cavity and is intersected with the first spline shaft is arranged in the air cylinder in a sliding mode, the transmission device further comprises a fourth transmission cavity which is arranged in the machine body, is positioned at the rear side of the transverse, a third rotating shaft positioned at the rear side of the transverse moving cavity is rotatably arranged on the front and rear end walls of the fourth transmission cavity, a fourth rotating shaft positioned at the upper side of the third rotating shaft is rotatably arranged on the front and rear end walls of the fourth transmission cavity, a fourth belt wheel connected with the first belt wheel through a second belt is fixedly arranged on the outer surface of the third rotating shaft, a fifth belt wheel positioned at the rear side of the fourth belt wheel is fixedly arranged on the outer surface of the third rotating shaft, a sixth belt wheel connected with the fifth belt wheel through a third belt is fixedly arranged on the upper side of the fifth belt wheel on the outer surface of the fourth rotating shaft, the same third sliding block is slidably arranged on the outer surfaces of the third rotating shaft and the fourth rotating shaft, a second spline shaft in spline fit with the fourth rotating shaft is rotatably arranged in the third sliding block on the upper side, and an eighth bevel gear positioned in the third sliding block is fixedly arranged on the outer surface of the second spline shaft, the third slide block at the lower side and the third slide block at the upper side are arranged in the same way, a fifth rotating shaft between the third rotating shaft and the fourth rotating shaft is arranged between the two third slide blocks in a rotating way, a ninth bevel gear which is positioned in the third slide block and is meshed with the eighth bevel gear is fixedly arranged on the end surface of the fifth rotating shaft, a fourth slide block is arranged on the outer surface of the fifth rotating shaft in a sliding way, a third spline shaft which is in spline fit with the fifth rotating shaft is arranged in the fourth slide block in a rotating way, a tenth bevel gear which is positioned in the fourth slide block is fixedly arranged on the outer surface of the third spline shaft, a second sleeve shaft which is arranged at the position of the roller shaft and extends to the rear side is arranged on the front end surface of the fourth slide block in a rotating way, and an eleventh bevel gear which is meshed with the tenth bevel gear and is positioned in the fourth slide, a sixth rotating shaft is arranged in the second sleeve shaft in a spline fit mode, an Itoer twelfth bevel gear is fixedly arranged on the end face of the sixth rotating shaft, a sleeve mutually fixed with the first support on the rear side is rotatably arranged on the outer surface of the sixth rotating shaft, and a thirteenth bevel gear meshed with the twelfth bevel gear is fixedly arranged at the right end of the roller shaft on the rear side.