CN209360979U

CN209360979U - A kind of novel poultry Baoding operating table

Info

Publication number: CN209360979U
Application number: CN201821940041.9U
Authority: CN
Inventors: 梁耀文; 李博; 张辉华; 邓赣奇; 黄增颖
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2019-09-10
Anticipated expiration: 2028-11-23

Abstract

The utility model discloses a kind of novel poultry Baoding operating table, including station made of permeability magnetic material, the lower wall surface of station is equipped with magnechuck, iron core is equipped in magnechuck, iron core is wound with electromagnetic coil, the poultry for being cased with Magnetic absorbing element is fixed on station by the induced magnetic field that magnechuck generates, it is in vertically arranged electric pushrod that the lower section of magnechuck, which is equipped with, electric pushrod can drive magnechuck to move up and down, the lower end of electric pushrod is connected with rotating mechanism, rotating mechanism includes fixing seat, it is in vertically arranged mounting hole that the upper wall surface of fixing seat, which is equipped with, mounting hole is set with cylindrical rotation seat, the lower part of rotation seat and mounting hole are rotatablely connected, the upper end of rotation seat is fixedly connected with the lower end of electric pushrod, fixing seat is equipped with rotate driving unit, rotate driving unit powered rotatable seat is being pacified It fills in hole and rotates, the lifting and rotation of doctor's controllable operation platform are performed an operation with facilitating.The utility model is used for in the operation of poultry.

Description

A kind of novel poultry Baoding operating table

Technical field

The utility model relates to poultry field of surgery, in particular to a kind of novel poultry Baoding operating table.

Background technique

Retainer refers to desk for operation consent that animal is fixed, is doing poultry operation consent, it is necessary first to by poultry It is fixed on retainer, common to be bound the head of poultry and four limbs with cloth, the fixed mode one of cloth is easy loosening, and two It performs the operation can not meet to large batch of poultry, because cloth fixation is cumbersome, substantially increases the workload of patient, The time for extending operation, and it is difficult to ensure each operation all specification Baoding, restraint efficacy is bad to will have a direct impact on operation It goes on smoothly, while existing retainer is similar to a firm desk and immovable, can not transfer ideal up and down Height, cause doctor to be inconvenient to be operated, the doctor for needing to perform an operation for a long time is susceptible to suffer from lumbar vertebrae, cervical vertebra class disease.

Utility model content

Technical problem to be solved by the utility model is: providing a kind of novel poultry Baoding operating table, doctor is controllable The lifting and rotation of station are performed an operation with facilitating, and poultry quickly and stably can reduce the behaviour of doctor on station in Baoding It measures, shortens the time of operation.

The solution that the utility model solves its technical problem is:

A kind of novel poultry Baoding operating table, including station in the form of annular discs, the axis of the station is in perpendicular To setting, the station is made of permeability magnetic material, and the lower wall surface of the station is equipped with electromagnetism in the form of annular discs Sucker, the upper wall surface of the magnechuck are fixedly connected with the lower wall surface of station, are equipped in magnechuck in the form of annular discs Iron core, the iron core is fixedly mounted in magnechuck, and the iron core is wound with electromagnetic coil, the magnechuck Lower section be equipped with elevating mechanism, the elevating mechanism includes the electric pushrod and electricity in vertically arranged electric pushrod Magnetic-disc, station coaxial arrangement, the upper end of the electric pushrod are fixedly connected with the lower wall surface of magnechuck, the electricity Dynamic push rod can drive magnechuck to move up and down, and the lower end of the electric pushrod is connected with rotating mechanism, the rotating machine Structure includes fixing seat, and it is in vertically arranged mounting hole that the upper wall surface of the fixing seat, which is equipped with, and the mounting hole, which is set with, is in Columned rotation seat, the rotation seat are described in vertically arranged, the lower part of the rotation seat and mounting hole rotation connection The upper end of rotation seat be fixedly connected with the lower end of electric pushrod, the rotation seat and electric pushrod are coaxially disposed, described Fixing seat is equipped with rotate driving unit, and the rotate driving unit and rotation seat are sequentially connected, the rotate driving list First powered rotatable seat rotates in mounting hole.

As a further improvement of the foregoing solution, the outer diameter of the magnechuck is equal with station, the electromagnetism Sucker is covered on the lower wall surface of station.

As a further improvement of the foregoing solution, multiple fixture blocks are equipped in the upper wall surface of station, the fixture block includes Press strip, the both ends of the press strip are equipped with magnet, and the magnet is fixedly connected with press strip.

As a further improvement of the foregoing solution, the station is equipped with absorption switch, and the absorption switchs installation On the edge of station, the absorption switch and electromagnetic coil are electrically connected.

As a further improvement of the foregoing solution, the lower wall surface of the magnechuck is equipped with connector sleeve, the electromagnetism Sucker is fixedly connected by connector sleeve with the upper end of electric pushrod.

It as a further improvement of the foregoing solution, further include two foot pedals, before fixing seat is arranged in two foot pedals Side, two foot pedals are arranged in left-right situs, and the fixed plate connecting with fixing seat is equipped in the lower section of two foot pedals, described It is equipped with rotating block on the downside of foot pedal, is fixedly connected in the middle part of the rotating block and foot pedal lower wall surface, the foot pedal is logical The upper wall surface for crossing rotating block and fixed plate is hinged so that foot pedal can swing, the lower wall surface of the foot pedal is from going to It is equipped with the first contact, the second contact afterwards, first contact, the second contact are separately positioned on front side and the rear side of rotating block, The upper wall surface of the fixed plate is equipped with and the corresponding third contact of the first contact position, corresponding with the second contact position Four contacts are equipped with gap between first contact and third contact, between the second contact and the 4th contact, in rotating block Front side be equipped with the first spring, rotating block rear side be equipped with second spring, first spring, second spring are in vertical Setting, the lower wall surface connection of the upper end of the first spring, the upper end of second spring and foot pedal, first spring The upper wall surface of lower end, the lower end of second spring and fixed plate connects.

As a further improvement of the foregoing solution, the rotate driving unit includes the servo electricity being mounted in fixing seat Machine, the servo motor are connected in vertically arranged transmission shaft, and the lower end of the transmission shaft is connect with servo motor, institute The upper end for the transmission shaft stated is connected with gear, and the lateral wall on the rotation seat top is set with ring gear matched with the gear, institute The ring gear stated is fixedly connected with rotation seat, and the ring gear engages connection with gear.

As a further improvement of the foregoing solution, the lateral wall of the rotation seat lower part is set with fixed ring, described Fixed ring is fixedly connected with rotation seat, the inner sidewall sliding contact of the side wall and mounting hole of the fixed ring, the fixation The downside of ring is equipped with the first thrust bearing, and first thrust bearing is sleeved on rotation seat, the lower wall of the fixed ring Face is abutted by the first thrust bearing with the bottom wall of mounting hole, and the upside of the fixed ring is equipped with the second thrust bearing, described The second thrust bearing be sleeved on rotation seat, the upper end of the mounting hole is set with fixing sleeve, the fixing sleeve and peace The upper end in dress hole is fixedly connected, and the upper wall surface of the fixed ring is abutted by the second thrust bearing with fixing sleeve.

The beneficial effects of the utility model are: operating table is connect with power supply unit when in use, after electromagnetic coil is powered, make It obtains magnechuck and generates induced magnetic field, operation consent, in the fixation that the four limbs of poultry and head set upper iron ring etc. can be attracted by the magnetic force Part, the induced magnetic field that then magnechuck generates is adsorbed on fixing piece on station, so that poultry is fixed on station, Different poultry can be met to fix, compared with the mode fixed with traditional cloth, the contusion to poultry can be reduced, make poultry can quickly, It is firmly secured on station, reduces the operating quantity of doctor, after operation, need to only power off and magnechuck is enabled to demagnetize, it is easy to operate, Shorten the time of operation, the upper and lower position of station can be also adjusted by electric pushrod, and rotate driving unit can drive and turn Dynamic seat rotates in mounting hole, and then drives station rotation, and doctor can optionally control station and be performed an operation with facilitating, be made Lumbar vertebrae, cervical vertebra class disease can be prevented by obtaining doctor.

The utility model is used for in the operation of poultry.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it His design scheme and attached drawing.

Fig. 1 is the side view partial cutaway view of the utility model embodiment；

Fig. 2 is the rotation seat of the utility model embodiment and the partial cutaway view that mounting hole is connect；

Fig. 3 is the foot pedal of the utility model embodiment and the partial cutaway view that fixed plate is connect；

Fig. 4 is the overlooking structure diagram of the utility model embodiment；

Fig. 5 is the structural schematic diagram of the fixture block of the utility model embodiment.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection It encloses.In addition, all connection/connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific reality Situation is applied, by adding or reducing couple auxiliary, Lai Zucheng more preferably coupling structure.Each technology in the utility model is special Sign, can be with combination of interactions under the premise of not conflicting conflict.

Referring to figs. 1 to Fig. 5, this is the embodiments of the present invention, specifically:

A kind of novel poultry Baoding operating table, including station 100 in the form of annular discs, the axis of the station 100 Line is made in vertically arranged, described station 100 of permeability magnetic material, and the lower wall surface of the station 100, which is equipped with, is in The upper wall surface of discoid magnechuck 200, the magnechuck 200 is fixedly connected with the lower wall surface of station 100, in electricity Iron core 210 in the form of annular discs is equipped in magnetic-disc 200, the iron core 210 is fixedly mounted in magnechuck 200, described Iron core 210 is wound with electromagnetic coil 220, and the lower section of the magnechuck 200 is equipped with elevating mechanism, the elevating mechanism packet It includes in vertically arranged electric pushrod 300, the electric pushrod 300 and magnechuck 200, station 100 are coaxially disposed, institute The upper end for the electric pushrod 300 stated is fixedly connected with the lower wall surface of magnechuck 200, and the electric pushrod 300 can drive electricity Magnetic-disc 200 moves up and down, and the lower end of the electric pushrod 300 is connected with rotating mechanism, and the rotating mechanism includes solid Reservation 400, it is in vertically arranged mounting hole 410 that the upper wall surface of the fixing seat 400, which is equipped with, and the mounting hole 410 is set with There is cylindrical rotation seat 420, the rotation seat 420 is in vertically arranged, the lower part of the rotation seat 420 and mounting hole 410 rotation connections, the upper end of the rotation seat 420 are fixedly connected with the lower end of electric pushrod 300, the rotation seat 420 Be coaxially disposed with electric pushrod 300, the fixing seat 400 is equipped with rotate driving unit, the rotate driving unit with Rotation seat 420 is sequentially connected, and the rotate driving unit powered rotatable seat 420 rotates in mounting hole 410.When in use Operating table is connect with power supply unit, after electromagnetic coil 220 is powered, so that the generation induced magnetic field of magnechuck 200, operation consent, The fixing piece that the four limbs of poultry and head set upper iron ring etc. can be attracted by the magnetic force, the induced magnetic field that then magnechuck 200 generates Fixing piece is adsorbed on station 100, so that poultry is fixed on station 100, different poultry can be met and fixed, with biography The fixed mode of system cloth compares, and can reduce the contusion to poultry, be fixed on poultry can quickly and stably on station 100, The operating quantity for reducing doctor after operation, need to only power off and magnechuck 200 is enabled to demagnetize, easy to operate, shorten the time of operation, also The upper and lower position of station 100 can be adjusted by electric pushrod 300, and rotate driving unit powered rotatable seat 420 is being pacified Rotation in hole 410 is filled, and then station 100 is driven to rotate, doctor can optionally control station and be performed an operation with facilitating, so that Doctor can prevent lumbar vertebrae, cervical vertebra class disease.

It is further used as preferred embodiment, the outer diameter of the magnechuck 200 is equal with station 100, described Magnechuck 200 be covered on the lower wall surface of station 100.This can expand the range of the absorption of station 100, consolidate poultry can It is scheduled on each position of 100 upper wall surface of station, convenient for the operation of doctor, while also meeting the fixation of different size poultry.

It is further used as preferred embodiment, is equipped with multiple fixture blocks 500, the folder in the upper wall surface of station 100 Block 500 includes press strip 510, and the both ends of the press strip 510 are equipped with magnet 520, and the magnet 520 and press strip 510 are fixed Connection.Press strip 510 uses soft materials for support, in fixed poultry, press strip 510 is overlayed on position fixed needed for poultry, Then the magnetic-adsorption that the magnet 520 at 510 both ends of press strip is generated by magnechuck 200 is on station 100, according to different need Ask, can the upper wall surface of station 100 move up 510 both ends of dynamic pressure item magnet 520 position, adjust fixed elastic of poultry Degree, it is easy to operate.

It is further used as preferred embodiment, the station 100 is equipped with absorption switch 110, and the absorption is opened It closes 110 to be mounted on the edge of station 100, the absorption switch 110 and electromagnetic coil 220 are electrically connected.Power supply unit It is electrically connected by absorption switch 110 and electromagnetic coil 220, doctor can control electromagnetic coil 220 by absorption switch 110 Energization or power-off, and adsorb switch 110 and be arranged on the edge of station 100, convenient for the operation of doctor.

It is further used as preferred embodiment, the lower wall surface of the magnechuck 200 is equipped with connector sleeve 230, described Magnechuck 200 be fixedly connected by connector sleeve 230 with the upper end of electric pushrod 300.Electric pushrod can be improved in connector sleeve 230 300 structural strengths being connect with magnechuck 200, to improve the stability and durability of operating table.

It is further used as preferred embodiment, further includes two foot pedals 600, two foot pedals 600 are arranged in fixation The front side of seat 400, two foot pedals 600 are arranged in left-right situs, are equipped with and fixing seat 400 in the lower section of two foot pedals 600 The fixed plate 430 of connection is equipped with rotating block 610, the rotating block 610 and foot pedal 600 on the downside of the foot pedal 600 It is fixedly connected in the middle part of lower wall surface, the foot pedal 600 is hinged by rotating block 610 and the upper wall surface of fixed plate 430, makes Foot pedal 600 can swing, the lower wall surface of the foot pedal 600 be equipped with from front to back the first contact 620, second touching First 630, first contact 620, the second contact 630 are separately positioned on front side and the rear side of rotating block 610, the fixation The upper wall surface of plate 430 is equipped with and the corresponding third contact 431 in 620 position of the first contact, corresponding with 630 position of the second contact 4th contact 432, between first contact 620 and third contact 431, between the second contact 630 and the 4th contact 432 Equipped with gap, it is equipped with the first spring 640 in the front side of rotating block 610, is equipped with second spring 650, institute in the rear side of rotating block 610 The first spring 640 for stating, second spring 650 are in vertically arranged, the upper end of first spring 640, second spring 650 Upper end is connect with the lower wall surface of foot pedal 600, the lower end of the first spring 640, the lower end of second spring 650 and fixed plate 430 upper wall surface connection.When operation, doctor's both feet need to stand on two foot pedals 600, and face is towards station 100, when right side 600 toe of foot pedal is exerted oneself, and the foot pedal 600 on right side is swung backward, and the foot pedal 600 on right side compresses second spring 650, is made It obtains the second contact 630 to contact with the 4th contact 432, electric pushrod 300 is powered, and station 100 is pushed to move up；Work as right side 600 heel of foot pedal exert oneself, the foot pedal 600 on right side is swung forward, and the foot pedal 600 on right side compresses the first spring 640, is made It obtains the first contact 620 to contact with third contact 431, electric pushrod 300 is powered, and station 100 is pushed to move down；When left side 600 toe of foot pedal is exerted oneself, and the foot pedal 600 in left side is swung backward, and the foot pedal 600 in left side compresses second spring 650, so that Second contact 630 is contacted with the 4th contact 432, and rotate driving unit driving station 100 rotates clockwise；When riding for left side 600 heel of plate is exerted oneself, and the foot pedal 600 in left side is swung forward, and the foot pedal 600 in left side compresses the first spring 640, so that first Contact 620 is contacted with third contact 431, and rotate driving unit driving station 100 rotates counterclockwise；Left and right foot pedal 600 can To control moving up and down and rotating left and right for station 100, doctor can optionally control station and be performed an operation with facilitating.

It is further used as preferred embodiment, the rotate driving unit includes being mounted on watching in fixing seat 400 Motor 440 is taken, the servo motor 440 is connected in vertically arranged transmission shaft 441, the lower end of the transmission shaft 441 Connect with servo motor 440, the upper end of the transmission shaft 441 is connected with gear 442,420 top of rotation seat it is outer Sidewall sheath, which is equipped with, to be fixedly connected with the matched ring gear 421 of gear 442, the ring gear 421 with rotation seat 420, the ring gear 421 engage connection with gear 442.Transmission shaft 441 is driven to rotate by servo motor 440, transmission shaft 441 is with 442 turns of moving gear It is dynamic, and gear 442 drives rotation seat 420 to rotate by way of engaging with ring gear 421, carries out that station 100 is driven to rotate, Engaging connection with gear 442 by ring gear 421 can be improved the stability of the rotation of station 100.

It is further used as preferred embodiment, the lateral wall of 420 lower part of rotation seat is set with fixed ring 422, The fixed ring 422 is fixedly connected with rotation seat 420, and the side wall of the fixed ring 422 and the inner sidewall of mounting hole 410 are sliding The downside of dynamic contact, the fixed ring 422 is equipped with the first thrust bearing 423, and first thrust bearing 423 is sleeved on On rotation seat 420, the lower wall surface of the fixed ring 422 is abutted by the first thrust bearing 423 with the bottom wall of mounting hole 410, The upside of the fixed ring 422 is equipped with the second thrust bearing 424, and second thrust bearing 424 is sleeved on rotation seat On 420, the upper end of the mounting hole 410 is set with fixing sleeve 411, the upper end of the fixing sleeve 411 and mounting hole 410 It is fixedly connected, the upper wall surface of the fixed ring 422 is abutted by the second thrust bearing 424 with fixing sleeve 411.It is pushed away by first Power bearing 423 and the second thrust bearing 424 can fix the position of rotation seat 420 in the axial direction, and rotation seat 420 is avoided to move It is dynamic, while also increasing the fastness that rotation seat 420 is connect with rotation seat 420, prevent the direction in the course of rotation of rotation seat 420 The lower wall surface of the phenomenon that inclination, fixed ring 422 are abutted by the first thrust bearing 423 with the bottom wall of mounting hole 410, and rotation is reduced Frictional force between seat 420 and mounting hole 410 improves the fluency that rotation seat 420 rotates.

The better embodiment of the utility model is illustrated above, but the utility model be not limited to it is described Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention Type or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.

Claims

1. a kind of novel poultry Baoding operating table, it is characterised in that: including station (100) in the form of annular discs, the behaviour Make the axis of platform (100) in vertically arranged, the station (100) is made of permeability magnetic material, the station (100) Lower wall surface be equipped with magnechuck in the form of annular discs (200), the upper wall surface and station of the magnechuck (200) (100) lower wall surface is fixedly connected, and iron core (210) in the form of annular discs, the iron core are equipped in magnechuck (200) (210) it is fixedly mounted in magnechuck (200), the iron core (210) is wound with electromagnetic coil (220), the electromagnetism The lower section of sucker (200) is equipped with elevating mechanism, the elevating mechanism include in vertically arranged electric pushrod (300), it is described Electric pushrod (300) and magnechuck (200), station (100) be coaxially disposed, the upper end of the electric pushrod (300) It is fixedly connected with the lower wall surface of magnechuck (200), the electric pushrod (300) can drive and move down on magnechuck (200) Dynamic, the lower end of the electric pushrod (300) is connected with rotating mechanism, and the rotating mechanism includes fixing seat (400), described Fixing seat (400) upper wall surface be equipped be in vertically arranged mounting hole (410), the mounting hole (410) be set in circle Columnar rotation seat (420), the rotation seat (420) are in vertically arranged, the lower part of the rotation seat (420) and mounting hole (410) it is rotatablely connected, the upper end of the rotation seat (420) is fixedly connected with the lower end of electric pushrod (300), the rotation Seat (420) and electric pushrod (300) are coaxially disposed, and the fixing seat (400) is equipped with rotate driving unit, the rotation Driving unit and rotation seat (420) are sequentially connected, and the rotate driving unit powered rotatable seat (420) is in mounting hole (410) rotation in.

2. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: the magnechuck (200) outer diameter is equal with station (100), and the magnechuck (200) is covered on the lower wall surface of station (100).

3. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: in station (100) Upper wall surface is equipped with multiple fixture blocks (500), and the fixture block (500) includes press strip (510), and the both ends of the press strip (510) are equal Equipped with magnet (520), the magnet (520) is fixedly connected with press strip (510).

4. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: the station (100) it is equipped with absorption switch (110), the absorption switch (110) is mounted on the edge of station (100), the suction Switch (110) and electromagnetic coil (220) are electrically connected.

5. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: the magnechuck (200) lower wall surface is equipped with connector sleeve (230), and the magnechuck (200) passes through connector sleeve (230) and electric pushrod (300) upper end is fixedly connected.

6. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: further include two foot pedals (600), in the front side of fixing seat (400), two foot pedals (600) are arranged in left-right situs for two foot pedal (600) settings, The lower section of two foot pedals (600) is equipped with the fixed plate (430) connecting with fixing seat (400), the foot pedal (600) downside It equipped with rotating block (610), is fixedly connected in the middle part of the rotating block (610) and foot pedal (600) lower wall surface, described is foot-operated Plate (600) by rotating block (610) and the upper wall surface of fixed plate (430) it is hinged so that foot pedal (600) can swing, institute The lower wall surface for the foot pedal (600) stated is equipped with the first contact (620), the second contact (630), first contact from front to back (620), the second contact (630) is separately positioned on front side and the rear side of rotating block (610), the upper wall of the fixed plate (430) Face is equipped with and the corresponding third contact (431) in the first contact (620) position, the corresponding with the second contact (630) position the 4th Contact (432), between first contact (620) and third contact (431), the second contact (630) and the 4th contact (432) Between be equipped with gap, be equipped with the first spring (640) in the front side of rotating block (610), be equipped with the in the rear side of rotating block (610) Two springs (650), first spring (640), second spring (650) are in vertically arranged, described the first spring (640) Upper end, second spring (650) upper end connect with the lower wall surface of foot pedal (600), under first spring (640) It holds, the lower end of second spring (650) is connect with the upper wall surface of fixed plate (430).

7. the novel poultry Baoding operating table of one kind according to claim 1, it is characterised in that: the rotate driving list Member includes the servo motor (440) being mounted on fixing seat (400), and the servo motor (440) is connected in vertically arranged Transmission shaft (441), the lower end of the transmission shaft (441) connect with servo motor (440), the transmission shaft (441) Upper end is connected with gear (442), and the lateral wall on the rotation seat (420) top is set with and gear (442) matched ring gear (421), the ring gear (421) is fixedly connected with rotation seat (420), the ring gear (421) and gear (442) company of engagement It connects.

8. the novel poultry Baoding operating table of one kind according to claim 7, it is characterised in that: the rotation seat (420) lateral wall of lower part is set with fixed ring (422), and the fixed ring (422) is fixedly connected with rotation seat (420), institute The side wall for the fixed ring (422) stated and the inner sidewall sliding contact of mounting hole (410), the fixed ring are set on the downside of (422) Have the first thrust bearing (423), first thrust bearing (423) is sleeved on rotation seat (420), the fixed ring (422) lower wall surface is abutted by the first thrust bearing (423) with the bottom wall of mounting hole (410), the fixed ring (422) Upside is equipped with the second thrust bearing (424), and second thrust bearing (424) is sleeved on rotation seat (420), the peace The upper end of dress hole (410) is set with fixing sleeve (411), and the upper end of the fixing sleeve (411) and mounting hole (410) is fixed to be connected It connects, the upper wall surface of the fixed ring (422) is abutted by the second thrust bearing (424) with fixing sleeve (411).