CN113665002A

CN113665002A - Circular saw with polishing function

Info

Publication number: CN113665002A
Application number: CN202111001543.1A
Authority: CN
Inventors: 赵浩翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-11-19

Abstract

The invention discloses a circular saw with a polishing function, which comprises an L-shaped connecting plate, wherein one side of the lower end of the L-shaped connecting plate is connected with a cutting motor through a bolt, an output shaft of the cutting motor penetrates through one side of the L-shaped connecting plate, and the end part of the output shaft of the cutting motor is provided with a cutting blade, a matching inner cavity is arranged in the L-shaped connecting plate, the cutting blade is positioned in the matching inner cavity, a middle box body is arranged in the matching inner cavity, an inner cavity is arranged in the middle box body, symmetrical surrounding grooves are communicated in the end walls at the two sides of the internal cavity, symmetrical sliding blocks are arranged in the surrounding grooves in a sliding manner, a matching column body is arranged between the sliding blocks at the two sides of the internal cavity, the utility model discloses a circular saw, including cooperation cylinder, connecting rod, triangle file, saw bit, the cooperation cylinder one side is provided with the connecting rod, connecting rod one side pivoted is provided with the cone pulley of polishing, and this equipment can utilize the triangle file to carry out abundant efficient with the saw bit of circular saw and polish and make it keep good operating condition.

Description

Circular saw with polishing function

Technical Field

The invention relates to the technical field of circular saw equipment, in particular to a circular saw with a grinding function.

Background

The circular saw is a common tool, and is often used for cutting profiles or plates, and the corresponding circular saw can cut the corresponding profiles or plates by driving the circular saw to realize high-speed operation through a motor, and the profiles or plates are separated after cutting, and because the profiles or plates are made of many materials, the tooth form of the circular saw cannot be damaged by each material, and when some materials which easily cause the damage of the tooth form of the circular saw are cut, the tooth form damage of the circular saw is obvious at the moment, and a person generally adopts a mode of directly replacing the corresponding circular saw to keep the sharpness of the circular saw after the tooth form of the circular saw is damaged, although some equipment in the prior art adopts a mode of polishing the circular saw to keep the tooth form of the circular saw sharp, the adopted mode usually adopts a triangular file to polish each tooth form, this wastes a lot of time and energy for the personnel.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a circular saw with a polishing function, which can solve the technical problems.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a circular saw with function of polishing, includes L type connecting plate, and there is the cutting motor lower extreme one side of L type connecting plate through bolted connection, and the output shaft of cutting motor runs through one side of L type connecting plate to the output shaft tip of cutting motor is equipped with the cutting piece, be provided with the cooperation inner chamber in the L type connecting plate, the cutting piece is located intracavity in the cooperation, be provided with middle box in the cooperation intracavity, be provided with inside chamber in the middle box, the intercommunication is provided with the groove of encircleing of symmetry in the inside chamber both sides end wall, encircle the gliding sliding block that is provided with the symmetry that is in the inslot, be located inside chamber both sides be provided with the cooperation cylinder between the sliding block, cooperation cylinder one side is provided with the connecting rod, connecting rod one side pivoted is provided with the cone pulley of polishing, the cone pulley of polishing with the cutting piece offsets the setting, inside chamber top is provided with and can drives the sliding block is in it is close to or keeps away from simultaneously around the inslot to encircle the inslot The top driving device of the cutting blade is characterized in that a polishing device for performing reciprocating polishing on the tooth profile of the cutting blade by combining a conveying belt and a steel file is arranged in the inner cavity, and a rotation adjusting device capable of enabling the middle box body to surround the cutting blade and adjusting the middle box body according to the cutting blade with different sizes is arranged in the L-shaped connecting plate.

As a preferred technical scheme, the top driving device comprises an internal moving cavity communicated with the internal cavity, an internal motor is arranged in the end wall of the internal moving cavity, an output shaft is arranged on one side of the internal motor in a power connection mode, symmetrical internal threads are arranged in the internal moving cavity in a sliding mode and are connected with thread lines with opposite rotating directions on the outer surface of the output shaft in a threaded fit mode respectively, a protruding block is arranged in the internal thread moving block, a sliding lifting rod is arranged in the internal thread moving block in a sliding mode, symmetrical and open matching grooves are formed in two sides of the sliding lifting rod and are connected with the protruding block in a sliding fit mode, and the sliding lifting rod is hinged to a matching cylinder.

As a preferable technical scheme, the grinding device comprises a transmission box body arranged in the end wall of the internal cavity driving vehicle, an output motor is arranged on the upper side of the transmission box body, a transmission belt is arranged on one side of the output motor in a power connection mode, a connecting wheel is wound on the outer surface of the transmission belt, triangular files are arranged below two sides of the connecting wheel in a staggered mode, the triangular files are connected with the transmission belt in a matched mode through a connecting assembly so that the triangular files can synchronously move with the connecting wheel and can rotate, and unidirectional movement assemblies capable of enabling the output motors on two sides to only move in one direction and enabling the transmission belt to reciprocate are arranged in the transmission box body on two sides.

As a preferable technical scheme of the present invention, the connecting assembly includes bases disposed on a lower side of the connecting wheel, the bases are symmetrically disposed, the bases are connected with the triangular files in a rotating fit manner, the bases are disposed on two sides of the connecting wheel and are staggered, the triangular files pass through tooth shapes of the cutting blade, and the connecting wheel slightly passes over the cutting blade.

As a preferred technical scheme, the unidirectional movement assembly comprises a rotation connecting disc which is in rotation fit connection with the transmission box body, an internal fit cavity is arranged in the rotation connecting disc, a plurality of elastic sliding holes are formed in the end wall of the internal fit cavity in a communicating mode, abutting sliding rods are arranged in the elastic sliding holes in a sliding mode, a buffer connecting spring is elastically arranged in the abutting sliding rods and the end wall of the elastic sliding hole, a fixed wheel is fixedly arranged on one side of the transmission box body, a plurality of tooth sockets are arranged in the fixed wheel, the tooth sockets on the two sides face opposite directions, and the abutting sliding rods extend into the tooth sockets to abut against the tooth sockets.

As a preferred technical scheme of the present invention, the rotation adjusting device includes a swing fit motor disposed in the L-shaped connecting plate, a swing box is disposed on one side of an output shaft of the swing fit motor, an internal open cavity is disposed in the swing box, a rotation threaded rod is rotatably disposed on an end wall of the internal open cavity, the rotation threaded rod is driven to rotate by a driving motor disposed in the internal open cavity, a sliding connection fitting block is slidably disposed in the internal open cavity, the sliding connection fitting block is in threaded fit connection with the rotation threaded rod, and the sliding connection fitting block is fixedly in fit connection with the middle box.

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

this equipment can utilize the triangle file to carry out abundant efficient with the saw bit of circular saw and polish and make it keep good operating condition.

The swing fit motor can indirectly drive the swing box body and the middle box body to swing, the rotating threaded rod can drive the sliding connection fit block to slide in the inner opening cavity after rotating, the middle box body is close to or far away from the swing fit motor, at the moment, adjustment can be carried out on the cutting blades with different specifications, when the cutting blades are ground, firstly, the inner motor works to drive the output shaft to rotate, the output shaft rotates to drive the internal threads to move close to or far away from each other in the inner moving cavity, at the moment, the internal threads move to close to each other, after the sliding lifting rod slides in the internal threads move to limit movement in the surrounding groove by the sliding block, the grinding cone wheels are close to and abut against each other at the tooth-shaped parts of the cutting blades, the inclined plane position of the grinding cone wheel is preferentially worn when the grinding cone wheel is worn, the grinding cone wheel can be kept to be completely abutted against the cutting blade for grinding and the grinding cone wheel is uniformly ground so that the grinding cone wheel is not wasted, the grinding cone wheel is indirectly abutted against and rolled and ground on two side surfaces of the cutting blade by the swing fit motor in the process of grinding the cutting blade by the grinding cone wheel, the triangular file can grind the tooth profile of the cutting blade in the grinding process, the output motor positioned on the left side of the middle box body rotates forwards and rotates backwards, the output motor positioned on the right side of the middle box body rotates backwards, when the output motor on the left side rotates forwards, the transmission belt rotates forwards, and at the moment, the abutting sliding rod is clamped by the tooth socket due to the rotation direction of the tooth profile on the outer surface of the fixed wheel, the rotating connecting disc, the fixed wheel and the transmission box body are kept relatively static, the transmission belt can only be rotated at the moment, the transmission belt rotates to left to drive the connecting wheel to operate, the transmission belt and the output motor on the right side rotate forwards, the tooth profile on the outer surface of the fixed wheel at the right moment enables the propping sliding rods to extrude the buffer connecting spring in the elastic sliding hole, the propping sliding rods move along the tooth grooves, the transmission belt, the output motor and the rotating connecting disc on the right side rotate relative to the fixed wheel and the transmission box body, the triangular files which are arranged in the connecting wheel in a crossed mode can be driven to penetrate through the tooth profiles between the cutting blades to polish, and when the triangular files reset, the manufactured output motor stops working, make the right side output motor carries out reversal work and can make through above-mentioned principle the triangle file resets again, and resets the in-process and can right the profile of tooth of cutting piece is polished, and what above-mentioned working procedure adopted is directly utilized middle box centers on the cutting piece slowly rotates in proper order will the cutting piece evenly polishes, makes after polishing the cutting piece is in the homogeneous state, prevents that some positions from causing excessively polishing after polishing.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention;

FIG. 2 is a schematic view at A in FIG. 1;

FIG. 3 is a schematic view in the direction B-B in FIG. 2;

FIG. 4 is an enlarged schematic view of the transmission housing of FIG. 2;

FIG. 5 is a schematic view in the direction C of FIG. 4;

FIG. 6 is a schematic view in the direction D of FIG. 4;

FIG. 7 is a schematic view in the direction E of FIG. 4;

in the figure: 1 backup pad, 2 connection socle, 3 aspiration pumps, 4 dirty tanks, 5 rose boxes, 6 supporting baseplate, 7 connection otic placodes, 8 first electric telescopic handle, 9L type connecting plate, 10 threaded rods, 11 motors, 12 control switch, 13 second electric telescopic handle, 14 fixed pressing plates, 15 air extraction head, 16 cutting piece, 17 cutting motors, 18 link, 19 extension rods, 20 supporting seats, 21 third electric telescopic handle, 22U type locating plate, 23 filter pulp, 24 support racks, 25 filter paper, 26 connection handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a circular saw with a polishing function comprises an L-shaped connecting plate 9, one side of the lower end of the L-shaped connecting plate 9 is connected with a cutting motor 17 through a bolt, an output shaft of the cutting motor 17 penetrates through one side of the L-shaped connecting plate 9, a cutting blade 16 is arranged at the end part of the output shaft of the cutting motor 17, a matching inner cavity 32 is arranged in the L-shaped connecting plate 9, the cutting blade 16 is positioned in the matching inner cavity 32, a middle box body 55 is arranged in the matching inner cavity 32, an inner cavity 46 is arranged in the middle box body 55, symmetrical surrounding grooves 43 are arranged in end walls on two sides of the inner cavity 46 in a communicating manner, symmetrical sliding blocks 45 are arranged in the surrounding grooves 43 in a sliding manner, a matching cylinder 44 is arranged between the sliding blocks 45 on two sides of the inner cavity 46, a connecting rod 42 is arranged on one side of the matching cylinder 44, a polishing cone wheel 41 is arranged on one side of the connecting rod 42 in a rotating manner, the polishing cone wheel 41 is abutted against the cutting blade 16, the top of the inner cavity 46 is provided with a top driving device which can drive the sliding block 45 to be close to or far away from the cutting blade 16 in the surrounding groove 43, a grinding device which can grind the tooth form of the cutting blade 16 in a reciprocating manner by combining a conveying belt and a steel file is arranged in the inner cavity 46, and a rotation adjusting device which can enable the middle box body 55 to surround the cutting blade 16 and can adjust the middle box body 55 according to the cutting blades 16 with different sizes is arranged in the L-shaped connecting plate 9.

Beneficially, wherein the top driving device includes an inner moving cavity 49 communicated with the inner cavity 46, an inner motor 47 is disposed in an end wall of the inner moving cavity 49, an output shaft 48 is disposed on one side of the inner motor 47 in a power connection manner, symmetrical inner thread moving blocks 54 are slidably disposed in the inner moving cavity 49, the inner thread moving blocks 54 are respectively in thread fit connection with thread lines with opposite rotation directions on the outer surface of the output shaft 48, a protruding block 53 is disposed in the inner thread moving block 54, a sliding lifting rod 51 is slidably disposed in the inner thread moving block 54, symmetrical and open fitting grooves 52 are disposed on two sides of the sliding lifting rod 51, the fitting grooves 52 are in sliding fit connection with the protruding block 53, and the sliding lifting rod 51 is hinged to the fitting cylinder 44.

Beneficially, wherein, grinding device includes the transmission case body 61 that sets up in the end wall of interior cavity 46 driving, the transmission case body 61 upside is provided with output motor 74, output motor 74 one side power connection is provided with drive belt 62, the winding of drive belt 62 surface is provided with fifth wheel 63, the position is crisscross to be provided with the triangle file 64 below the both sides of fifth wheel 63, the triangle file 64 passes through coupling assembling and is connected with drive belt 62 cooperation so that the triangle file 64 can realize the rotation with the while of fifth wheel 63 synchronous motion, be provided with the unidirectional movement subassembly that can make the output motor 74 of both sides only carry out the operation of one direction and make drive belt 62 realize reciprocating motion in the transmission case body 61 of both sides.

Advantageously, wherein the connecting assembly comprises a base 75 arranged on the lower side of the connecting wheel 63, the base 75 is symmetrically arranged, the base 75 is connected with the triangular files 64 in a rotating fit manner, the base 75 is arranged on two sides of the connecting wheel 63 and is staggered, the triangular files 64 penetrate through the tooth form of the cutting blade 16, and the connecting wheel 63 slightly penetrates above the cutting blade 16.

Beneficially, the unidirectional motion assembly comprises a rotary connecting disc 72 connected with the transmission case 61 in a rotating fit mode, an internal fit cavity 76 is arranged in the rotary connecting disc 72, a plurality of elastic sliding holes 71 are arranged in end walls of the internal fit cavity 76 in a communicating mode, abutting sliding rods 79 are arranged in the elastic sliding holes 71 in a sliding mode, buffer connecting springs 73 are arranged in the abutting sliding rods 79 and the end walls of the elastic sliding holes 71 in an elastic mode, a fixed wheel 77 is fixedly arranged on one side of the transmission case 61, a plurality of tooth sockets 78 are arranged in the fixed wheel 77, the tooth sockets 78 on the two sides face opposite directions, and the abutting sliding rods 79 extend into the tooth sockets 78 to abut against the tooth sockets 78.

Beneficially, the rotation adjusting device includes a swing fit motor 31 disposed in the L-shaped connecting plate 9, a swing box 57 is disposed on one side of an output shaft of the swing fit motor 31, an internal opening cavity 58 is disposed in the swing box 57, a rotation threaded rod 59 is disposed in an end wall of the internal opening cavity 58 for rotating, the rotation threaded rod 59 is driven to rotate by a driving motor disposed in the internal opening cavity 58, a sliding connection fitting block 56 is slidably disposed in the internal opening cavity 58, the sliding connection fitting block 56 is in threaded fit connection with the rotation threaded rod 59, and the sliding connection fitting block 56 is in fixed fit connection with the intermediate box 55.

When the equipment works, because the cutting blade 16 is easy to have the situation that the tooth form is not sharp or even has a gap after the gypsum board is cut, most of the ways adopted by the prior art are that the corresponding cutting blade 16 is directly replaced by manpower, the cutting blade 16 can be kept to be cut strongly, in this case, the cutting blade 16 is replaced more trouble and the equipment downtime is too long easily, and a great amount of cutting blades 16 are wasted, which is not beneficial to reducing the use cost of the equipment, then, in the second embodiment, the cutting blade 16 can be fully ground to keep the tooth form of the cutting blade 16 sharp, when the cutting blade 16 is ground, the cutting blade 16 is in the condition of stopping rotating, at the moment, the swing matching motor 31 can indirectly drive the swing box body 57 and the middle box body 55 to swing, and the rotating threaded rod 59 can drive the sliding connection matching block 56 to slide in the inner open cavity 58, the middle box body 55 is close to or far away from the swing matching motor 31, the cutting blades 16 of different specifications can be adjusted at the moment, when the cutting blades 16 are ground, firstly, the internal motor 47 works to drive the output shaft 48 to rotate, because the output shaft 48 rotates to drive the internal thread moving block 54 to move close to or far away from each other in the internal moving cavity 49, at the moment, the internal thread moving blocks 54 are close to each other, after the sliding lifting rod 51 slides in the internal thread moving block 54, when the sliding block 45 limits the movement in the surrounding groove 43, the grinding cone wheels 41 are close to and abut against the tooth-shaped parts of the cutting blades 16, the inclined plane position of the grinding cone wheel 41 can be preferentially worn during the wear, at the moment, the grinding cone wheel 41 can be kept to be completely abutted against the cutting blades 16 and ground uniformly, so that the grinding cone wheel 41 is not wasted, and the swing matching motor 31 indirectly enables the grinding cone wheel 41 to cut the cutting blades 16 in the grinding cone wheel 41 Two side surfaces of the sheet 16 are butted and rolled for polishing, the triangular file 64 can polish the tooth form of the cutting sheet 16 in the polishing process, at the moment, the output motor 74 positioned at the left side of the middle box body 55 rotates forwards, the output motor 74 positioned at the right side of the middle box body 55 rotates backwards, when the output motor 74 at the left side rotates forwards, the transmission belt 62 rotates forwards, at the moment, the butted sliding rod 79 is clamped by the tooth socket 78 due to the rotation direction of the tooth form on the outer surface of the fixed wheel 77, the relative rest is kept between the rotating connecting disc 72 and the fixed wheel 77 and the transmission box body 61, at the moment, the transmission belt 62 can only rotate, the transmission belt 62 rotates leftwards to drive the connecting wheel 63 to operate, the transmission belt 62 and the output motor 74 at the right side rotate forwards, and at the moment, the butted sliding rod 79 can extrude the buffer connecting spring 73 in the elastic sliding hole 71 due to the rotation direction of the tooth form on the outer surface of the fixed wheel 77, make the butt slide bar 79 move along tooth's socket 78, can make the drive belt 62 on right side this moment, output motor 74, rotate connection pad 72 and rotate for fixed wheel 77 and transmission box 61, can drive the profile of tooth that is located connecting wheel 63 internal intersection setting triangle file 64 and passes between the cutting piece 16 and polish, when triangle file 64 resets, the output motor 74 that makes this moment stops working, make the output motor 74 on right side carry out reversal work and can make triangle file 64 restore to the throne again through above-mentioned principle, and can polish the profile of tooth of cutting piece 16 in the reset process, the above-mentioned working procedure adopts and directly utilizes middle box 55 to carry out in proper order slow rotation around cutting piece 16 and evenly polish cutting piece 16, make the cutting piece 16 after polishing be in even state, prevent some positions from causing excessive polishing because of polishing after.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A circular saw with a polishing function comprises an L-shaped connecting plate (9), wherein a cutting motor (17) is connected to one side of the lower end of the L-shaped connecting plate (9) through a bolt, an output shaft of the cutting motor (17) penetrates through one side of the L-shaped connecting plate (9), a cutting blade (16) is arranged at the end part of the output shaft of the cutting motor (17), a matching inner cavity (32) is arranged in the L-shaped connecting plate (9), the cutting blade (16) is located in the matching inner cavity (32), a middle box body (55) is arranged in the matching inner cavity (32), an inner cavity (46) is arranged in the middle box body (55), symmetrical surrounding grooves (43) are communicated in the end walls of the two sides of the inner cavity (46), symmetrical sliding blocks (45) are arranged in the surrounding grooves (43) in a sliding mode, and a matching column body (44) is arranged between the sliding blocks (45) on the two sides of the inner cavity (46), the utility model discloses a cutting blade grinding device, including cooperation cylinder (44), connecting rod (42) one side pivoted are provided with cone pulley (41) of polishing, cone pulley (41) of polishing with cutting piece (16) offset sets up, inside chamber (46) top is provided with can drive sliding block (45) are in encircle the groove (43) in be close to simultaneously or keep away from the top drive arrangement of cutting piece (16), it is right to be provided with in inside chamber (46) the profile of tooth of cutting piece (16) utilizes conveyer belt and steel to hinder and combines the grinding device who carries out reciprocal polishing, be provided with in L type connecting plate (9) and make middle box (55) center on cutting piece (16) and can be according to not unidimensional cutting piece (16) adjust the rotation adjusting device of middle box (55).

2. The circular saw with a sharpening function as recited in claim 1, wherein: the top drive comprises an internal displacement chamber (49) communicating with said internal chamber (46), an inner motor (47) is arranged in the end wall of the inner moving cavity (49), one side of the inner motor (47) is provided with an output shaft (48) in a power connection way, symmetrical internal thread moving blocks (54) are arranged in the inner moving cavity (49) in a sliding way, the internal thread moving blocks (54) are respectively in threaded fit connection with thread lines with opposite screwing directions on the outer surface of the output shaft (48), a convex block (53) is arranged in the internal thread moving block (54), a sliding lifting rod (51) is arranged in the internal thread moving block (54) in a sliding way, two sides of the sliding lifting rod (51) are provided with symmetrical and open matching grooves (52), the matching groove (52) is connected with the protruding block (53) in a sliding matching mode, and the sliding lifting rod (51) is hinged to the matching column body (44).

3. The circular saw with a sharpening function as recited in claim 1, wherein: the grinding device comprises a transmission box body (61) arranged in the end wall of the driving practice in the inner cavity (46), an output motor (74) is arranged on the upper side of the transmission case body (61), one side of the output motor (74) is provided with a transmission belt (62) in a power connection way, the outer surface of the transmission belt (62) is wound with a connecting wheel (63), the lower positions of two sides of the connecting wheel (63) are provided with triangular files (64) in a staggered way, the triangle file (64) through coupling assembling with drive belt (62) cooperation is connected so that the triangle file (64) can with when fifth wheel (63) synchronous movement and can realize the rotation, both sides be provided with in transmission box (61) and to make both sides output motor (74) only carry out the operation of one direction and make drive belt (62) realize reciprocating motion's unidirectional movement subassembly.

4. The circular saw with a sharpening function as recited in claim 3, wherein: coupling assembling including set up in base (75) of fifth wheel (63) downside, base (75) symmetry sets up, base (75) with triangle file (64) normal running fit connects, base (75) set up in both sides and crisscross setting of fifth wheel (63), triangle file (64) pass the profile of tooth of cutting piece (16), fifth wheel (63) skip the top of cutting piece (16).

5. The circular saw with a sharpening function as recited in claim 3, wherein: the unidirectional movement subassembly include with rotation connection pad (72) that transmission box body (61) normal running fit is connected, be provided with inside cooperation chamber (76) in rotation connection pad (72), the intercommunication is provided with a plurality of elasticity holes (71) that slide in inside cooperation chamber (76) end wall, the gliding offset slide bar (79) that is provided with in elasticity holes (71) that slides, offset slide bar (79) with elasticity is provided with buffering connecting spring (73) in elasticity holes (71) end wall, fixed pulley (77) that is provided with in transmission box body (61) one side, be provided with a plurality of tooth's sockets (78) in fixed pulley (77), both sides tooth's socket (78) orientation is opposite, offset slide bar (79) stretch into in tooth's socket (78) with tooth's socket (78) offset.

6. The circular saw with a sharpening function as recited in claim 1, wherein: rotation adjusting device including set up in swing cooperation motor (31) in L type connecting plate 9, the output shaft one side of swing cooperation motor (31) is provided with swing box (57), be provided with internal opening chamber (58) in swing box (57), internal opening chamber (58) end wall internal rotation is provided with rotation threaded rod (59), rotation threaded rod (59) by set up in driving motor drive in internal opening chamber (58) rotates, gliding connection cooperation piece (56) that is provided with in internal opening chamber (58), slide connect cooperation piece (56) with rotation threaded rod (59) screw-thread fit connects, slide connect cooperation piece (56) with middle box (55) fixed fit is connected.