CN108943152B

CN108943152B - Timber circular saw

Info

Publication number: CN108943152B
Application number: CN201810989158.4A
Authority: CN
Inventors: 彭灿
Original assignee: Funan Mengfa Crafts Co ltd
Current assignee: FUNAN MENGFA CRAFTS Co.,Ltd.
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2020-12-08
Anticipated expiration: 2038-08-28
Also published as: CN108943152A

Abstract

The invention belongs to the technical field of wood processing, and particularly relates to a circular saw for wood, which comprises a supporting structure, an adjusting structure, a working structure and an oil outlet mechanism, wherein the supporting structure comprises a bottom plate; the adjusting structure comprises a screw rod, a movable plate, a spring, a fixed plate, a fixed groove, a first slider, a first slide rail and a bearing, one end of the bottom plate is located to the fixed plate of rectangle, the fixed groove of waist shape is located on the fixed plate, first slide rail is equipped with two, two first slide rails are fixed in one side of fixed plate in parallel relation, two first slide rails are located respectively to two first sliders and are deviated from the one end of fixed plate, the movable plate is fixed in the one end that first slider deviates from first slide rail, the screw rod runs through in the movable plate and extends to the bottom plate, the bearing is located on the bottom plate, the spring centre gripping is. The wood circular saw provided by the invention can radiate the circular saw and can conveniently collect chips.

Description

Timber circular saw

Technical Field

The invention relates to the field of wood processing, in particular to a circular saw for wood.

Background

Wood is lignified tissue formed by plants capable of secondary growth, such as trees and shrubs, which have been primarily grown, and the formation of vascular layers in roots and stems starts to move, and bast develops outwards, and wood develops inwards, which is a general term for the development of plant tissue in which vascular formation layers develop inwards, including xylem and parenchyma rays, and plays a great supporting role in human life.

However, the conventional circular saw for wood generates a great amount of heat during operation, so that the circular saw needs to be stopped for rest after being used for a period of time, and the current circular saw generates more chips during operation. In view of this, the present invention provides a circular saw for wood, which has the following features:

(1) according to the circular saw for wood, the rectangular fixing plate is arranged at one end of the bottom plate, the two first sliding rails which are in parallel relation and used for the first sliding block to slide are arranged on one side of the fixing plate, the movable plate is fixed with the first sliding block, sliding between the movable plate and the fixing plate can be achieved, the movable plate can ascend and descend more smoothly due to the first sliding block and the first sliding rails, and the circular saw is convenient to mount and dismount.

(2) According to the wood circular saw, the oil in the oil cavity flows out of the oil outlet through the oil outlet mechanism, the oil outlets are arranged in a staggered mode, so that the oil flowing out of the oil outlet can correspond to all parts of the saw blade, the oil is distributed more uniformly, the cooling effect of the saw blade is good, the working efficiency is accelerated, and the service life of the saw blade is prolonged.

(3) According to the circular saw for wood, the cleaning mechanism is arranged at the top end of the supporting structure, the grooves which are obliquely arranged in the circular arc shape can better collect chips generated in the cutting process of the saw blade, and the chips generated in the cutting process can flow into the collecting box along the grooves.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a circular saw for wood, wherein a rectangular fixed plate is arranged at one end of a bottom plate, two first sliding rails which are in parallel relation and are used for a first sliding block to slide are arranged on one side of the fixed plate, a movable plate is fixed with the first sliding block, the sliding between the movable plate and the fixed plate can be realized, the movable plate can ascend and descend more smoothly due to the first sliding block and the first sliding rails, and the circular saw is convenient to mount and dismount; the oil outlet mechanism is used for realizing that the oil in the oil cavity flows out from the oil outlet, and the oil outlet is arranged in a staggered manner, so that the oil flowing out from the oil outlet can correspond to each part of the saw blade, the oil distribution is more uniform, the cooling effect of the saw blade is good, the working efficiency is accelerated, and the service life of the saw blade is prolonged; through being equipped with clearance mechanism on bearing structure's top, the recess that convex slope set up can be to the better collection of the piece that the saw bit cutting process produced, and the piece that makes the cutting process produce can be along the inside that the box was collected to the recess flow direction.

The technical scheme adopted by the invention for solving the technical problems is as follows: a timber circular saw comprises a supporting structure, an adjusting structure arranged inside the supporting structure, and a working structure which is arranged on the side wall of the supporting structure and used for cutting timber, wherein the supporting structure comprises a bottom plate; the adjusting structure is arranged at one end of the bottom plate and comprises a screw rod, a movable plate, a spring, a fixed plate, two fixing grooves, two first sliding rails and a bearing, the rectangular fixed plate is arranged at one end of the bottom plate, the waist-shaped fixing groove is arranged on the fixed plate, the two first sliding rails are fixed at one side of the fixed plate in parallel relation, the two first sliding blocks are respectively arranged at one end, away from the fixed plate, of the two first sliding rails and are connected with the first sliding rails in a sliding way, the movable plate is fixed at one end, away from the first sliding rails, of the first sliding rails, the screw rod penetrates through the movable plate and extends to the bottom plate, the bearing is arranged on the bottom plate, and the screw rod is rotationally connected with the bottom plate through the bearing, the spring is clamped between the movable plate and the bottom plate; the working structure is arranged at the top end of the bottom plate; the utility model discloses a saw bit, including bearing structure, saw bit, support structure's top surface, just bearing structure's top surface is equipped with clearance mechanism, just clearance mechanism includes recess and baffle, and is convex the recess slope sets up, just be equipped with the baffle in the middle of the recess, bearing structure's lateral wall is installed and is used for carrying out radiating mechanism of producing oil to the saw bit, the mechanism of producing oil includes out oil pipe, deposit oil pocket, oil-out and holds the cavity, the internally mounted who holds the cavity has deposit the oil pocket, just the one end intercommunication of depositing the oil pocket has an oil pipe, just the tip that produces oil pipe is equipped with a plurality.

Specifically, the movable plate is of a 7-shaped structure, the movable plate is connected with the fixed plate in a sliding mode through the first sliding block and the first sliding rail, two screw rods are arranged, the two screw rods are symmetrically distributed about the central line of the movable plate, and in order to enable the motor and the transmission shaft to move up and down together, the saw blade is convenient to install and detach.

Specifically, the supporting structure further comprises a saw table and support legs, the support legs are arranged on one side of the bottom plate, and the saw table is arranged at the top ends of the support legs and used for supporting and fixing.

Specifically, the bottom plate is close to the one end of fixed plate is equipped with collects the structure, collect the structure including collecting the cover, collecting box, second slide rail and fixed block, it locates to collect the cover the one end of fixed plate, the fixed block is located the bottom plate deviates from collect the one end of cover, collect the box and locate the bottom plate is close to one side of fixed block, just collect the box and pass through the second slide rail with fixed block sliding connection, the inside of collecting the cover is equipped with the through-hole and extends to collect the box, for the collection of convenient saw-dust.

Specifically, the operation structure includes motor, saw bit, action wheel, belt, follows driving wheel and transmission shaft, the motor is fixed in the fly leaf deviates from the one end of bottom plate, the action wheel is located the one end of motor, the belt is located the outside of action wheel, the transmission shaft run through in the fly leaf with the fixed plate, the transmission shaft with the fly leaf rotates and connects, locate from the driving wheel the one end of transmission shaft, the belt is connected the action wheel with from the driving wheel, the saw bit is located the outside of transmission shaft is in order to make the saw bit can normal rotation.

The utility model discloses a saw bench, including saw bench, limiting structure, limiting plate, spliced pole, fixed cover, spout and second slider, the limiting plate is located the top of saw bench, just the limiting plate is "protruding" shape structure, the limiting plate with saw bench sliding connection, the spliced pole is located the both ends of limiting plate, fixed cover is located on the both ends lateral wall of saw bench, the second slider is located the bottom of spliced pole, the spout is located the inside of fixed cover, the spliced pole passes through the second slider with fixed cover sliding connection can carry on spacingly to the plank when sawing wood for the convenience, prevents that the plank from taking place the dislocation when sawing, causes the damage of plank.

The invention has the beneficial effects that:

(1) according to the wood circular saw, the rectangular fixing plate is arranged at one end of the bottom plate, two first sliding rails which are parallel to each other and used for the first sliding block to slide are arranged on one side of the fixing plate, the movable plate is fixed with the first sliding block, sliding between the movable plate and the fixing plate can be achieved, the movable plate can ascend and descend more smoothly due to the first sliding block and the first sliding rails, and the circular saw is convenient to mount and dismount.

Drawings

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

FIG. 1 is a schematic structural view of a circular saw for cutting wood according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the connection structure of the adjustment structure and the working structure shown in FIG. 1;

FIG. 3 is a schematic structural view of the adjustment mechanism shown in FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 1;

FIG. 5 is a schematic structural view of the position-limiting structure shown in FIG. 1;

fig. 6 is a schematic connection diagram of the oil discharging mechanism shown in fig. 1.

Reference numbers in the figures: 1. the supporting structure, 11, a bottom plate, 12, a saw table, 13, a support leg, 2, an adjusting structure, 21, a screw, 22, a movable plate, 23, a spring, 24, a fixing plate, 25, a fixing groove, 26, a first sliding block, 27, a first sliding rail, 28, a bearing, 3, a working structure, 31, a motor, 32, a saw blade, 33, a driving wheel, 34, a belt, 35, a driven wheel, 36, a transmission shaft, 4, a collecting structure, 41, a collecting sleeve, 42, a collecting box, 43, a second sliding rail, 44, a fixing block, 5, a limiting structure, 51, a limiting plate, 52, a connecting column, 53, a fixing sleeve, 54, a sliding groove, 55, a second sliding block, 6, a cleaning mechanism, 61, a groove, 62, a partition plate, 7, an oil outlet mechanism, 71, an oil outlet pipe, 72, an oil storage cavity, 73, an oil outlet, 74 and.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1, 2, 3, 4, 5 and 6, a circular saw for wood comprises a supporting structure 1, an adjusting structure 2 installed inside the supporting structure 1, and a working structure 3 installed on the side wall of the supporting structure 1 for wood cutting, wherein the supporting structure 1 comprises a bottom plate 11; the adjusting structure 2 is disposed at one end of the bottom plate 11, the adjusting structure 2 includes a screw 21, a movable plate 22, a spring 23, a fixed plate 24, a fixed groove 25, two first sliding blocks 26, and a bearing 28, the rectangular fixed plate 24 is disposed at one end of the bottom plate 11, the waist-shaped fixed groove 25 is disposed on the fixed plate 24, the two first sliding blocks 27 are fixed at one side of the fixed plate 24 in parallel, the two first sliding blocks 26 are respectively disposed at one end of the two first sliding blocks 27 away from the fixed plate 24, the first sliding blocks 26 are slidably connected with the first sliding rails 27, the movable plate 22 is fixed at one end of the first sliding blocks 26 away from the first sliding rails 27, and the screw 21 penetrates through the movable plate 22 and extends to the bottom plate 11, the bearing 28 is disposed on the bottom plate 11, the screw 21 is rotatably connected to the bottom plate 11 through the bearing 28, and the spring 23 is clamped between the movable plate 22 and the bottom plate 11; the working structure 3 is arranged at the top end of the bottom plate 11; supporting structure 1's top surface is equipped with clearance mechanism 6, just clearance mechanism 6 includes recess 61 and baffle 62, and is convex recess 61 slope sets up, just be equipped with baffle 62 in the middle of the recess 61, supporting structure 1's lateral wall is installed and is used for carrying out radiating mechanism 7 that produces oil to saw bit 32, mechanism 7 that produces oil includes oil pipe 71, deposit oil pocket 72, oil-out 73 and holds cavity 74, the internally mounted who holds cavity 74 has deposit oil pocket 72, just the one end intercommunication of depositing oil pocket 72 has oil pipe 71, just the tip of oil pipe 71 is equipped with a plurality of oil-out 73, just oil-out 73 is located the outside of saw bit 32.

As shown in fig. 1, 2, 3 and 4, in the circular saw for wood according to the present invention, the movable plate 22 has a 7-shaped structure, the movable plate 22 and the fixed plate 24 are slidably connected through the first slider 26 and the first slide rail 27, two screw rods 21 are provided, and the two screw rods 21 are symmetrically distributed about a center line of the movable plate 22, so that the motor 31 and the transmission shaft 36 can move up and down together.

As shown in fig. 1, the supporting structure 1 further includes a saw table 12 and a supporting leg 13, the supporting leg 13 is disposed on one side of the bottom plate 11, and the saw table 12 is disposed at a top end of the supporting leg 13 for supporting and fixing.

As shown in fig. 1, 2, 3 and 4, in the circular saw for wood according to the present invention, a collecting structure 4 is disposed at an end of the bottom plate 11 close to the fixing plate 24, the collecting structure 4 includes a collecting sleeve 41, a collecting box 42, a second slide rail 43 and a fixing block 44, the collecting sleeve 41 is disposed at an end of the fixing plate 24, the fixing block 44 is disposed at an end of the bottom plate 11 away from the collecting sleeve 41, the collecting box 42 is disposed at a side of the bottom plate 11 close to the fixing block 44, the collecting box 42 is slidably connected to the fixing block 44 through the second slide rail 43, and a through hole is disposed inside the collecting sleeve 41 and extends to the collecting box 42, so as to facilitate collecting wood chips.

As shown in fig. 1 and 2, the working structure 3 of the circular saw for wood provided by the present invention includes a motor 31, a saw blade 32, a driving wheel 33, a belt 34, a driven wheel 35 and a transmission shaft 36, wherein the motor 31 is fixed at one end of the movable plate 22 away from the bottom plate 11, the driving wheel 33 is arranged at one end of the motor 31, the belt 34 is arranged outside the driving wheel 33, the transmission shaft 36 penetrates through the movable plate 22 and the fixed plate 24, the transmission shaft 36 is rotatably connected with the movable plate 22, the driven wheel 35 is arranged at one end of the transmission shaft 36, the belt 34 connects the driving wheel 33 and the driven wheel 35, and the saw blade 32 is arranged outside the transmission shaft 36 so as to enable the saw blade 32 to normally rotate.

As shown in fig. 1 and 5, in the circular saw for wood provided by the invention, one end of the saw table 12 is provided with a limiting structure 5, the limiting structure 5 comprises a limiting plate 51, a connecting column 52, a fixing sleeve 53, a sliding chute 54 and a second sliding block 55, the limiting plate 51 is arranged at the top end of the saw table 12, the limiting plate 51 is of a convex structure, the limiting plate 51 is connected with the saw table 12 in a sliding manner, the connecting columns 52 are arranged at the two ends of the limiting plate 51, the fixing sleeves 53 are arranged on the side walls of the two ends of the saw table 12, the second sliding block 55 is arranged at the bottom end of the connecting column 52, the sliding chute 54 is arranged inside the fixed sleeve 53, the connecting column 52 is slidably connected with the fixing sleeve 53 through the second sliding block 55, can carry on spacingly to the plank when sawing the wood in order to make things convenient for, prevent that the plank from taking place the dislocation when sawing, causing the damage of plank.

The working principle of the wood circular saw provided by the invention is as follows:

firstly, a wood board to be sawed is placed on the saw table 12, then the saw is sawed according to the needed width, the distance between the limiting plate 51 and the saw blade 32 is adjusted, then the power switch electrically connected with the motor 31 is turned on, the motor 31 is in a working state, the motor 31 drives the saw blade 32 to start rotating, the rectangular fixing plate 24 is arranged at one end of the bottom plate 11, one side of the fixing plate 24 is provided with two first sliding rails 27 which are in parallel relation and used for the sliding of the first sliding block 26, the movable plate 22 is fixed with the first sliding block 26, the sliding between the movable plate 22 and the fixing plate 24 can be realized, the first sliding block 26 and the first sliding rails 27 enable the movable plate 22 to ascend and descend more smoothly, the saw blade 32 is convenient to detach and mount, and the fixing and limiting effects on the movable plate 22 are achieved, the waist-shaped fixing groove 25 is arranged on the fixing plate 24, so that the transmission shaft 36 has enough movement space when moving up and down, the two screws 21 for adjusting the up-and-down movement of the movable plate 22 penetrate through the movable plate 22 and extend to the bottom plate 11, the screws 21 are rotatably connected with the bottom plate 11 through the bearings 28 fixed on the bottom plate 11, so that the movable plate 22 can ascend or descend when the screws 21 are rotated, the spring 23 clamped between the movable plate 22 and the bottom plate 11 can play a role in preventing the movable plate 22 from automatically descending due to gravity when the distance between the movable plate 22 and the bottom plate 11 is adjusted, the collecting sleeve 41 is arranged at one end of the bottom plate 11, and the collecting sleeve 41 is just arranged below the saw blade 32, the saw dust sawed by the saw blade 32 enters the collecting box 42 from the inside of the collecting sleeve 41, so that the saw dust is convenient to collect, the oil inside the oil cavity 72 flows out of the oil outlet 73 through the oil outlet mechanism 7, the oil outlet 73 is staggered, the oil flowing out of the oil outlet 73 can correspond to each part of the saw blade 32, the oil distribution is more uniform, the cooling effect of the saw blade 32 is good, the working efficiency is accelerated, and the service life of the saw blade 32 is prolonged.

The foregoing illustrates and describes the principles, general features, and 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 the embodiments and descriptions given above are only 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 fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A wood circular saw, comprising: the wood cutting machine comprises a supporting structure (1), an adjusting structure (2) arranged in the supporting structure (1), and a working structure (3) which is arranged on the side wall of the supporting structure (1) and used for cutting wood, wherein the supporting structure (1) comprises a bottom plate (11); the adjusting structure (2) is arranged at one end of the bottom plate (11), the adjusting structure (2) comprises a screw rod (21), a movable plate (22), a spring (23), a fixed plate (24), a fixed groove (25), first sliding blocks (26), first sliding rails (27) and a bearing (28), the rectangular fixed plate (24) is arranged at one end of the bottom plate (11), the waist-shaped fixed groove (25) is arranged on the fixed plate (24), the number of the first sliding rails (27) is two, the two first sliding rails (27) are fixed at one side of the fixed plate (24) in a parallel relation, the number of the first sliding blocks (26) is two, the two first sliding blocks (26) are respectively arranged at one end of the two first sliding rails (27) deviating from the fixed plate (24), and the first sliding blocks (26) are connected with the first sliding rails (27) in a sliding manner, the movable plate (22) is fixed at one end, away from the first slide rail (27), of the first slide block (26), the screw rod (21) penetrates through the movable plate (22) and extends to the bottom plate (11), the bearing (28) is arranged on the bottom plate (11), the screw rod (21) is rotatably connected with the bottom plate (11) through the bearing (28), and the spring (23) is clamped between the movable plate (22) and the bottom plate (11); the working structure (3) is arranged at the top end of the bottom plate (11);

the saw blade cleaning device is characterized in that a cleaning mechanism (6) is arranged on the top surface of the supporting structure (1), the cleaning mechanism (6) comprises a groove (61) and a partition plate (62), the arc-shaped groove (61) is obliquely arranged, the partition plate (62) is arranged in the middle of the groove (61), an oil outlet mechanism (7) used for dissipating heat of a saw blade (32) is installed on the side wall of the supporting structure (1), the oil outlet mechanism (7) comprises an oil outlet pipe (71), an oil storage cavity (72), an oil outlet (73) and an accommodating cavity (74), the oil storage cavity (72) is installed inside the accommodating cavity (74), one end of the oil storage cavity (72) is communicated with the oil outlet pipe (71), a plurality of oil outlets (73) are arranged at the end part of the oil outlet pipe (71), and the oil outlet (73) is located on the outer side of the saw blade (32);

the movable plate (22) is of a 7-shaped structure, the movable plate (22) and the fixed plate (24) are connected in a sliding mode through the first sliding block (26) and the first sliding rail (27), two screw rods (21) are arranged, and the two screw rods (21) are symmetrically distributed around the central line of the movable plate (22);

the supporting structure (1) further comprises a saw table (12) and a supporting leg (13), the supporting leg (13) is arranged on one side of the bottom plate (11), and the saw table (12) is arranged at the top end of the supporting leg (13);

a collecting structure (4) is arranged at one end, close to the fixing plate (24), of the bottom plate (11), the collecting structure (4) comprises a collecting sleeve (41), a collecting box (42), a second sliding rail (43) and a fixing block (44), the collecting sleeve (41) is arranged at one end of the fixing plate (24), the fixing block (44) is arranged at one end, away from the collecting sleeve (41), of the bottom plate (11), the collecting box (42) is arranged at one side, close to the fixing block (44), of the bottom plate (11), the collecting box (42) is in sliding connection with the fixing block (44) through the second sliding rail (43), and a through hole is formed in the collecting sleeve (41) and extends to the collecting box (42);

the working structure (3) comprises a motor (31), a saw blade (32), a driving wheel (33), a belt (34), a driven wheel (35) and a transmission shaft (36), the motor (31) is fixed at one end, deviating from the bottom plate (11), of the movable plate (22), the driving wheel (33) is arranged at one end of the motor (31), the belt (34) is arranged at the outer portion of the driving wheel (33), the transmission shaft (36) penetrates through the movable plate (22) and the fixed plate (24), the transmission shaft (36) is rotatably connected with the movable plate (22), the driven wheel (35) is arranged at one end of the transmission shaft (36), the belt (34) is connected with the driving wheel (33) and the driven wheel (35), and the saw blade (32) is arranged at the outer portion of the transmission shaft (36);

one end of the saw table (12) is provided with a limiting structure (5), the limiting structure (5) comprises a limiting plate (51), a connecting column (52), a fixing sleeve (53), a sliding chute (54) and a second sliding block (55), the limiting plate (51) is arranged at the top end of the saw table (12), the limiting plate (51) is of a convex structure, the limiting plate (51) is in sliding connection with the saw table (12), the connecting column (52) is arranged at two ends of the limiting plate (51), the fixing sleeve (53) is arranged on side walls of two ends of the saw table (12), the second sliding block (55) is arranged at the bottom end of the connecting column (52), the sliding chute (54) is arranged inside the fixing sleeve (53), and the connecting column (52) is in sliding connection with the fixing sleeve (53) through the second sliding block (55);

firstly, a wood board to be sawed is placed on the saw table (12), then the sawing width is adjusted according to the requirement, the distance between the limiting plate (51) and the saw blade (32) is adjusted, then a power switch electrically connected with the motor (31) is turned on, the motor (31) is in a working state, the motor (31) drives the saw blade (32) to start rotating, the rectangular fixing plate (24) is arranged at one end of the bottom plate (11), one side of the fixing plate (24) is provided with two first sliding rails (27) which are in parallel relation and used for the first sliding block (26) to slide, the movable plate (22) is fixed with the first sliding block (26), namely, the sliding between the movable plate (22) and the fixing plate (24) can be realized, and the first sliding block (26) and the first sliding rails (27) enable the movable plate (22) to ascend and descend more smoothly, the saw blade (32) is convenient to detach and mount, the saw blade (32) plays a role in fixing and limiting the movable plate (22), the waist-shaped fixing groove (25) is arranged on the fixing plate (24), the transmission shaft (36) can move up and down, the two screws (21) used for adjusting the up and down movement of the movable plate (22) penetrate through the movable plate (22) and extend to the bottom plate (11), the screws (21) are rotatably connected with the bottom plate (11) through the bearings (28) fixed on the bottom plate (11), the movable plate (22) can ascend or descend when the screws (21) are rotated, and the distance between the movable plate (22) and the bottom plate (11) can be adjusted by the springs (23) clamped between the movable plate (22) and the bottom plate (11), the movable plate (22) is prevented from automatically descending due to the action of gravity, the collecting sleeve (41) is arranged at one end of the bottom plate (11), the collecting sleeve (41) is just arranged below the saw blade (32), saw dust sawed by the saw blade (32) enters the collecting box (42) from the inside of the collecting sleeve (41), the saw dust is convenient to collect, oil inside the oil cavity (72) existing through the oil outlet mechanism (7) flows out from the oil outlet (73), the oil outlet (73) is staggered, the oil flowing out from the oil outlet (73) can correspond to each part of the saw blade (32), the oil distribution is more uniform, the cooling effect of the saw blade (32) is good, the working efficiency is accelerated, and the service life of the saw blade (32) is prolonged.