CN111732043B

CN111732043B - A add lid machine for food glass jar

Info

Publication number: CN111732043B
Application number: CN202010570114.5A
Authority: CN
Inventors: 邱志强
Original assignee: Zhucheng Foxon Machinery Technology Co ltd
Current assignee: Zhucheng Foxon Machinery Technology Co ltd
Priority date: 2020-06-21
Filing date: 2020-06-21
Publication date: 2022-05-27
Anticipated expiration: 2040-06-21
Also published as: CN111732043A

Abstract

The invention discloses a capping machine for food glass jars, which structurally comprises a top seat, a motor, an upright post, a base, a lifting rod, a lower die, a limiting clamping device, an upper die, a sealing edge roller device and a hanging post, wherein the base is connected with the top seat through the upright post, one side of the top seat is provided with the motor, and the other side of the top seat is provided with the hanging post, and compared with the prior art, the capping machine has the beneficial effects that: according to the invention, the lower die is additionally provided with the motion-limiting clamping device consisting of the motion-limiting clamping component, the base body, the gas storage component, the gas guide pipe and the power mechanism, so that the glass tank clamping device can be suitable for glass tanks with different specifications, not only can the glass tank be centered on the lower die, but also can be positioned right below the upper die, the glass tank can be conveniently sealed by covering, and can be clamped, the glass tank is effectively prevented from falling from the lower die and being damaged, and meanwhile, rubber particles have a damping function in the clamping process, and the liquid in the glass tank can be prevented from being spilled due to shaking.

Description

A add lid machine for food glass jar

Technical Field

The invention relates to the technical field of glass jar capping machinery, in particular to a capping machine for food glass jars.

Background

The can is a sealable container made of metal sheet, glass, plastic, cardboard or a combination of the above materials, commercial food is stored, and after specific treatment, commercial sterility is achieved, the can be kept at normal temperature for a long time without being damaged, and the can is popular among people, and in order to keep the vacuum in the can for a long time, the can be sealed by capping, for fruit cans made of glass materials, the can is sealed by capping, most of the cans are sealed by placing the glass cans on a lower die of a capping machine, an upper die and an edge sealing roller are rotated, and the glass cans are static, so that the lids are sealed by pressing, the upper die and the edge sealing roller can resonate when rotating, liquid in the glass cans is easy to spill out by resonating, the glass cans are easy to fall off from the lower die and damage by being simply placed on the lower die, and the glass cans are different in specification and can not be placed in the middle on the lower die, this can result in a positional deviation between the can and the upper mold, which is disadvantageous for capping and sealing the can.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provides a capping machine for food glass jars.

The invention is realized by adopting the following technical scheme: the utility model provides a add capping machine for food glass jar, its structure is including footstock, motor, stand, base, lifter, lower mould, restrictive clamping device, go up mould, banding roller device, davit, the base passes through the stand to be connected with the footstock, one side of footstock is equipped with the motor, and the opposite side is equipped with the davit, mould, banding roller device are installed to the davit, it is middle to go up the mould and be located banding roller device, it is located the lower mould directly over to go up the mould, the lower mould is connected perpendicularly with the lifter bottom center, the lifter is connected in the base, the lower mould still is connected with restrictive clamping device.

Specifically, the limiting clamping device comprises a limiting clamping assembly, a base body, a gas storage assembly, a gas guide pipe and a power mechanism, wherein the limiting clamping assembly is arranged in the base body at eight equal intervals, the gas storage assembly is arranged between every two adjacent limiting clamping assemblies, the limiting clamping assemblies and the gas storage assembly are arranged alternately, the gas storage assemblies are connected through the gas guide pipe, the gas guide pipe is communicated with the gas storage assembly, the base body is further provided with the power mechanism, and the base body is connected with the lower die.

Specifically, the base body comprises a movable opening, an inner ring, a limiting mounting block, a groove, a guide ring and an outer ring, wherein the inner ring which is of a concentric circle structure is arranged in the outer ring, the movable opening is formed in an eighth halving position of the inner ring, the movable opening and the limiting mounting block are arranged alternately, the limiting mounting block is fixedly connected with the inner ring, the limiting mounting block is provided with the groove, and the guide ring is fixed on the inner wall of the outer ring.

Specifically, the gas storage subassembly is including a permanent magnet, silica gel block, round hole, gas storage bag, the gas storage bag internal fixation has the silica gel block, be equipped with a permanent magnet in the silica gel block, the one end of gas storage bag is the blind end, and the other end is equipped with the communicating round hole of gas storage bag inner chamber, the gas storage bag is connected with the air duct, the gas storage bag is located the recess and is linked to each other with spacing installation piece.

Specifically, the air duct is including air guide hole, body, through-hole, the body is protruding type structure setting, the convex part of body is equipped with the air guide hole, the one end that body and gas storage bag blind end link to each other is closed setting, and the other end is equipped with the through-hole, the through-hole communicates with each other with the round hole, body and gas storage bag open end seamless connection, the open end are the round hole, the body even in the clamping component of moving.

The utility model discloses a clamping assembly, including rubber granule, clamp plate, blow and blow book, adapter, U type piece, blow the one end that blows the book and link to each other with the adapter, blow the tape that blows the book and match with U type piece activity, U type piece is connected in clamp plate, the clamp plate equipartition has rubber granule, the convex part of body runs through in the adapter that meets with it.

Concretely, power unit is including No. two permanent magnets, rotatory ring, drive assembly, driven tooth piece, No. two permanent magnets have all been inlayed to eight partition positions in the rotatory ring, the annular and the lead ring clearance fit of rotatory ring, the inner wall of rotatory ring still equipartition has driven tooth piece, driven tooth piece and drive assembly cooperation, drive assembly locates between inner ring and the outer loop.

Specifically, drive assembly is including initiative tooth piece, ring, dark mouth, circle piece, disk, be fixed with the circle piece on the disk, the disk is located the below of ring, the dark mouth has been seted up to the ring, the bore of dark mouth slightly is greater than the diameter of circle piece, the outer wall equipartition of ring has initiative tooth piece, initiative tooth piece meshes with driven tooth piece mutually, the center of disk and the output shaft of micromotor.

Advantageous effects

Compared with the prior art, the invention provides a capping machine for food glass jars, which has the following beneficial effects:

the wafer drives the round block to rotate by driving the micro motor to operate, the round block continues to rotate after entering a deep opening, the round block can drive the ring to rotate, so that the ring can realize intermittent rotation, when the ring rotates, the driving tooth block and the driven tooth block drive the rotating ring to rotate under the guiding action of the guide ring, when the rotating ring rotates until a second permanent magnet is opposite to a first permanent magnet, the second permanent magnet generates repulsion force to the first permanent magnet based on the principle that opposite polarities of magnets repel each other, so that the air storage bag is pressed inwards to extrude inert gas into a blowing coil through a round hole, a through hole, a pipe body and an air guide hole, the blowing coil of the blowing coil can expand and extend outwards, the clamping plate can be pushed to move outwards to move towards the glass tank to be clamped, not only the glass tank can be clamped, but also the glass tank can be placed in the middle, and the arrangement of rubber particles on the clamping plate can improve the attaching degree with the glass tank, thereby improve the clamp plate and press from both sides tightly the glass jar, prevent that the glass jar from dropping from the lower mould, rubber granules have the absorbing function simultaneously and can prevent that the glass jar from taking place to rock, avoid the liquid in the glass jar to spill, rotate along with the ring when No. two permanent magnets to keeping away from a permanent magnet, the gas storage bag then not when being pressed because of magnet repulsion, blow and roll up and can reset and flow back in the gas storage bag with its interior gas of automatic backrush.

Compared with the prior art, the glass tank clamping device has the advantages that the lower die is additionally provided with the limiting clamping device consisting of the limiting clamping component, the base body, the gas storage component, the gas guide pipe and the power mechanism, so that the glass tank clamping device can be suitable for glass tanks of different specifications, the glass tank can be centered on the lower die, the glass tank can be positioned right below the upper die, the glass tank can be conveniently sealed by covering, the glass tank can be clamped, the glass tank can be effectively prevented from falling from the lower die and being damaged, meanwhile, rubber particles have a damping function in the clamping process, and liquid in the glass tank can be prevented from being spilled due to shaking.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of a capping machine for food glass jars according to the present invention.

Fig. 2 is a schematic view of the internal first operating state of the motion-limiting clamping device of the present invention.

Fig. 3 is a schematic view of the internal second operating state of the motion-limiting clamping device of the present invention.

FIG. 4 is a schematic cross-sectional view of a substrate according to the present invention.

Fig. 5 is a schematic view showing the internal structure of the air reservoir of the present invention.

FIG. 6 is a schematic cross-sectional view of the airway tube of the present invention.

Fig. 7 is a schematic view of the structure of the motion-limiting clamping assembly of the present invention.

Fig. 8 is a schematic structural diagram of the power mechanism of the present invention.

Fig. 9 is a schematic structural diagram of the driving assembly of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

the device comprises a top seat a, a motor b, an upright post c, a base d, a lifting rod e, a lower die f, a limiting clamping device g, an upper die h, a sealing roller device i, a suspension post j, a limiting clamping component tt1, a base body tt2, an air storage component tt3, an air guide pipe tt4, a power mechanism tt5, a movable port 2t1, an inner ring 2t2, a limiting installation block 2t3, a groove 2t4, a guide ring 2t5, an outer ring 2t6, a first permanent magnet 3t1, a silica gel block 3t2, a circular hole 3t3, an air storage bag 3t4, an air guide hole 4t1, a pipe body 4t2, a through hole 4t3, rubber particles 1t1, a clamping plate 1t2, a blowing coil 1t3, an adapter 1t4, a U-shaped block 1t5, a second permanent magnet 5t1, a driving component 5t2, a driving component 5t3, a driven toothed block 5t4, a driven toothed block 4, a driving circular ring 533 and a deep rotary ring 535.

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.

Example 1

Referring to fig. 1-8, the present invention provides a technical solution of a capping machine for food glass jars: its structure is including footstock an, motor b, stand c, base d, lifter e, lower mould f, limit clamping device g, go up mould h, banding roller device i, davit j, base d passes through stand c and is connected with footstock an, one side of footstock an is equipped with motor b, and the opposite side is equipped with davit j, mould h, banding roller device i are installed to davit j, it is middle to go up mould h to be located banding roller device i, it is located lower mould f directly over to go up mould h, lower mould f is connected perpendicularly with lifter e bottom center, lifter e connects in base d, lower mould f still is connected with limit clamping device g.

The limiting clamping device g comprises limiting clamping components tt1, a base body tt2, air storage components tt3, air guide tubes tt4 and power mechanisms tt5, the limiting clamping components tt1 are arranged in eight equal parts in the base body tt2, the air storage components tt3 are arranged between every two adjacent limiting clamping components tt1, the limiting clamping components tt1 and the air storage components tt3 are arranged at intervals, every two adjacent air storage components tt3 are connected through the air guide tubes tt4, the air guide tubes tt4 are communicated with the air storage components tt3, the base body tt2 is further provided with the power mechanisms tt5, and the base body tt2 is connected with a lower die f.

The base body tt2 comprises a movable opening 2t1, an inner ring 2t2, a limiting mounting block 2t3, a groove 2t4, a guide ring 2t5 and an outer ring 2t6, the inner ring 2t2 which is of a concentric circle structure is arranged in the outer ring 2t6, the movable opening 2t1 is formed in the inner ring 2t2 at eight equal parts, the movable openings 2t1 and the limiting mounting block 2t3 are arranged at intervals, the limiting mounting block 2t3 is fixedly connected with the inner ring 2t2, the limiting mounting block 2t3 is provided with a groove 2t4, and the guide ring 2t5 is fixed on the inner wall of the outer ring 2t 6.

The gas storage component tt3 is including a permanent magnet 3t1, silica gel block 3t2, round hole 3t3, gas storage bag 3t4, the gas storage bag 3t4 internal fixation has silica gel block 3t2, be equipped with a permanent magnet 3t1 in the silica gel block 3t2, the one end of gas storage bag 3t4 is the blind end, and the other end is equipped with the communicating round hole 3t3 with gas storage bag 3t4 inner chamber, gas storage bag 3t4 is connected with air duct tt4, inject into inert gas in the gas storage bag 3t 4.

The limiting clamping assembly tt1 is including rubber granule 1t1, clamping plate 1t2, blow and blow book 1t3, adapter 1t4, U type piece 1t5, blow and blow the one end that rolls up 1t3 and link to each other with adapter 1t4, blow and blow the book 1t3 blow the winding board and match with U type piece 1t5 activity, U type piece 1t5 is connected in clamping plate 1t2, clamping plate 1t2 equipartition has rubber granule 1t1, the convex part of body 4t2 runs through in its adapter 1t4 that meets.

The power mechanism tt5 comprises a second permanent magnet 5t1, a rotating ring 5t2, a driving assembly 5t3 and a driven gear block 5t4, wherein the second permanent magnet 5t1 is embedded in the rotating ring 5t2 at eight equal parts, a ring groove of the rotating ring 5t2 is in clearance fit with a guide ring 2t5, driven gear blocks 5t4 are evenly distributed on the inner wall of the rotating ring 5t2, the driven gear block 5t4 is in fit with the driving assembly 5t3, the driving assembly 5t3 is arranged between an inner ring 2t2 and an outer ring 2t6, and the second permanent magnet 5t1 is opposite to the first permanent magnet 3t1 in opposite magnetic poles.

Example 2

Referring to fig. 1-9, the present invention provides a capping machine for food glass cans, comprising: its structure is including footstock an, motor b, stand c, base d, lifter e, lower mould f, limit clamping device g, go up mould h, banding roller device i, davit j, base d passes through stand c and is connected with footstock an, one side of footstock an is equipped with motor b, and the opposite side is equipped with davit j, mould h, banding roller device i are installed to davit j, it is middle to go up mould h to be located banding roller device i, it is located lower mould f directly over to go up mould h, lower mould f is connected perpendicularly with lifter e bottom center, lifter e connects in base d, lower mould f still is connected with limit clamping device g.

The limit mounting block 2t3 is coupled with the groove 2t4 to conform to the shape of the air reservoir 3t4, and limit and fix one side surface of the air reservoir 3t 4.

Above-mentioned silica gel block 3t2 set up and lie in placing a permanent magnet 3t1, but based on silica gel block 3t2 pressurized deformation, can the reconversion after removing external force, can self-adaptation gas storage bag 3t4 pressurized by the deformation change of evagination indent to prevent that gas storage bag 3t4 from receiving a permanent magnet 3t1 edges and corners and wearing and tearing.

The gas reservoir 3t4 is configured to store inert gas, and to vent the inert gas when the gas reservoir 3t4 is depressed inwardly, the vented inert gas being capable of powering the extension of the retained clamp assembly tt 1.

The gas guide tube tt4 comprises a gas guide hole 4t1, a tube body 4t2 and a through hole 4t3, the tube body 4t2 is arranged in a convex structure, the convex part of the tube body 4t2 is provided with the gas guide hole 4t1, one end of the tube body 4t2 connected with the closed end of the gas storage bag 3t4 is arranged in a closed mode, the other end of the tube body is provided with the through hole 4t3, the through hole 4t3 is communicated with a round hole 3t3, the tube body 4t2 is connected with the open end of the gas storage bag 3t4 in a seamless mode, the open end of the tube body is a round hole 3t3, and the tube body 4t2 is connected with a limiting clamping component tt 1.

The air duct tt4 is provided to communicate the blowing coil 1t3 with the air reservoir 3t4, so that the inert gas can flow between the air reservoir 3t4 and the blowing coil 1t 3.

The blowing and blowing coil 1t3 is arranged in such a way that gas is injected inwards, the blowing coil tape of the blowing and blowing coil 1t3 expands and extends outwards, so that the clamping plate 1t2 can be pushed to translate outwards, and when the gas storage bag 3t4 is not pressed by a magnet repulsive force, the blowing and blowing coil 1t3 can automatically return to the coil and reset to return the gas in the gas storage bag 3t 4.

Above-mentioned rubber granule 1t1 set up lie in improving with the degree of conformity of glass jar, further improve clamping plate 1t2 and press from both sides tightly the glass jar, prevent that the glass jar from dropping from the lower mould, and rubber granule 1t1 has the absorbing function simultaneously and can prevent that the glass jar from taking place to rock, avoids the liquid in the glass jar to spill.

The arrangement of the U-shaped block 1t5 described above enables the pinch plate 1t2 to translate with the inward or outward rolling of the blowroll 1t 3.

The combination of the second permanent magnet 5t1 and the first permanent magnet 3t1 enables the second permanent magnet 5t1 to generate repulsive force to the first permanent magnet 3t1 based on the principle of opposite magnetic repulsion, so that the gas storage bag 3t4 is pressed to extrude inert gas.

The driving assembly 5t3 includes a driving gear block 531, a circular ring 532, a deep opening 533, a circular block 534, and a circular block 535, the circular block 535 is fixed with the circular block 534, the circular block 535 is located below the circular ring 532, the deep opening 533 is opened on the four equal parts of the circular ring 532, the caliber of the deep opening 533 is slightly larger than the diameter of the circular block 534, the driving gear block 531 is evenly distributed on the outer wall of the circular ring 532, the driving gear block 531 is meshed with the driven gear block 5t4, the center of the circular block 535 is connected with the output shaft of the micro-motor, and the deep opening 533 can be matched with the circular block 534.

Due to the arrangement of the round block 534 and the deep opening 533, when the round block 534 rotates along with the round piece 535 and enters the deep opening 533, the round block 534 can drive the round ring 532 to rotate, so that the round ring 532 can intermittently rotate, and the repulsion force generated by the second permanent magnet 5t1 on the first permanent magnet 3t1 is facilitated.

The working principle of the invention is as follows: the disc 535 drives the circular block 534 to rotate by driving the micro-motor to operate, after the circular block 534 enters the deep opening 533, the circular block 534 continues to rotate, the circular block 534 can drive the circular ring 532 to rotate, so that the circular ring 532 can realize intermittent rotation, when the circular ring 532 rotates, the driving tooth block 531 and the driven tooth block 5t4 drive the rotating ring 5t2 to rotate under the guiding action of the guide ring 2t5, when the rotating ring 5t2 rotates until the second permanent magnet 5t1 is opposite to the first permanent magnet 3t1, based on the principle of magnetic repulsion, the second permanent magnet 5t1 generates repulsion to the first permanent magnet 3t1, so that the air storage bag 3t4 is pressed to be sunken to extrude the inert gas into the blowing coil 1t3 through the circular hole 3t3, the through hole 4t3, the pipe body 4t2 and the air guide hole 4t1, the tape of the blowing coil 1t3 expands and extends outwards, so as to push the clamping plate 2 to translate outwards, so that the clamping plate 2 approaches to the glass can be clamped near to the glass can be clamped, can not only press from both sides tightly still to placing between two parties making the glass jar to the glass jar, the setting of rubber granule 1t1 can improve the degree of adhering to with the glass jar on the grip block 1t2, thereby it presss from both sides tightly the glass jar to improve grip block 1t2, prevent that the glass jar from taking place to rock, avoid the liquid in the glass jar to spill, rotate to keeping away from a permanent magnet 3t1 along with ring 532 when No. two permanent magnet 5t1, gas storage bag 3t4 is then not when being pressed because of the repulsive force of magnet, blow and roll up 1t3 and can automatic rollback and reset and flow back gas in it in gas storage bag 3t 4.

In summary, the technical progress obtained by the invention compared with the prior art is as follows: according to the invention, the lower die is additionally provided with the motion-limiting clamping device consisting of the motion-limiting clamping component, the base body, the gas storage component, the gas guide pipe and the power mechanism, so that the glass tank clamping device can be suitable for glass tanks with different specifications, not only can the glass tank be centered on the lower die, but also can be positioned right below the upper die, the glass tank can be conveniently sealed by covering, and can be clamped, the glass tank is effectively prevented from falling from the lower die and being damaged, and meanwhile, rubber particles have a damping function in the clamping process, and the liquid in the glass tank can be prevented from being spilled due to shaking.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a add capping machine for food glass jar, its structure is including footstock (a), motor (b), stand (c), base (d), lifter (e), lower mould (f), limit clamping device (g), go up mould (h), banding roller device (i), davit (j), base (d) are connected with footstock (a) through stand (c), footstock (a) side is equipped with motor (b), davit (j) are equipped with last mould (h), banding roller device (i), it is located lower mould (f) top to go up mould (h), lower mould (f) hang with lifter (e) and link, lifter (e) connect in base (d), lower mould (f) still link has limit clamping device (g), its characterized in that:

the motion-limiting clamping device (g) comprises motion-limiting clamping components (tt1), a base body (tt 2), air storage components (tt 3), air guide tubes (tt 4) and power mechanisms (tt 5), eight groups of motion-limiting clamping components (tt1) and eight groups of air storage components (tt 3) are arranged in the base body (tt 2) at intervals, two adjacent groups of air storage components (tt 3) are connected through the air guide tubes (tt 4), the air guide tubes (tt 4) are communicated with the air storage components (tt 3), and the power mechanisms (tt 5) are further arranged on the base body (tt 2);

the base body (tt 2) comprises a movable opening (2 t1), an inner ring (2 t2), a limiting mounting block (2 t 3), a groove (2 t 4), a guide ring (2 t 5) and an outer ring (2 t 6), the inner ring (2 t2) is arranged in the outer ring (2 t 6), the inner ring (2 t2) is provided with movable openings (2 t1) and limiting mounting blocks (2 t 3) which are alternately arranged, the limiting mounting block (2 t 3) is fixedly connected with the inner ring (2 t2), the limiting mounting block (2 t 3) is provided with a groove (2 t 4), and the outer ring (2 t 6) is fixedly provided with the guide ring (2 t 5);

the gas storage component (tt 3) comprises a first permanent magnet (3 t1), a silica gel block (3 t2), a round hole (3 t 3) and a gas storage bag (3 t 4), the silica gel block (3 t2) is connected in the gas storage bag (3 t 4), the first permanent magnet (3 t1) is arranged in the silica gel block (3 t2), the round hole (3 t 3) is formed in the gas storage bag (3 t 4), the gas storage bag (3 t 4) is connected with a gas guide tube (tt 4), and the gas storage bag (3 t 4) is arranged at the groove (2 t 4);

the air duct (tt 4) comprises an air guide hole (4t 1), a duct body (4t2) and a through hole (4t 3), the duct body (4t2) is provided with an air guide hole (4t 1) and the through hole (4t 3), the through hole (4t 3) is communicated with the round hole (3 t 3), the duct body (4t2) is connected with the air storage bag (3 t 4), and the duct body (4t2) is connected with a limiting clamping component (tt 1);

the limiting clamping assembly (tt1) comprises rubber particles (1 t1), a clamping plate (1 t2), a blowing and blowing coil (1 t 3), an adapter (1 t 4) and a U-shaped block (1 t 5), the blowing and blowing coil (1 t 3) is connected with the adapter (1 t 4), the blowing and blowing coil (1 t 3) is matched with the U-shaped block (1 t 5), the U-shaped block (1 t 5) is connected with the clamping plate (1 t2), the clamping plate (1 t2) is uniformly distributed with the rubber particles (1 t1), and the adapter (1 t 4) is connected with a pipe body (4t 2);

the power mechanism (tt 5) comprises a second permanent magnet (5 t1), a rotating ring (5 t2), a driving assembly (5 t 3) and a driven gear block (5 t 4), wherein the second permanent magnet (5 t1) is embedded in the rotating ring (5 t2), the rotating ring (5 t2) is matched with the guide ring (2 t 5), and the driven gear block (5 t 4) matched with the driving assembly (5 t 3) is uniformly distributed on the inner wall of the rotating ring (5 t 2).

2. A capping machine for food glass jars according to claim 1 and characterised in that: the driving assembly (5 t 3) comprises a driving tooth block (531), a circular ring (532), a deep opening (533), a circular block (534) and a circular ring (535), wherein the circular ring (535) is fixed with the circular block (534), the circular ring (532) is provided with the deep opening (533), the caliber of the deep opening (533) is slightly larger than the diameter of the circular block (534), and the driving tooth blocks (531) meshed with the driven tooth blocks (5 t 4) are uniformly distributed on the circular ring (532).