CN210641359U

CN210641359U - Wheel type precision dibbler

Info

Publication number: CN210641359U
Application number: CN201921622497.5U
Authority: CN
Inventors: 张朝书
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-02
Anticipated expiration: 2029-09-27

Abstract

The application relates to the technical field of precision hill planter for agricultural planting, in particular to a seed wheel type precision hill planter which comprises a fixed seed plate, a central shaft, an outer pressure ring, a rotary pressure plate, an inner frame sleeve, a seed taking wheel, a gear driving device and a rotary hill planter assembly; the center of the fixed seed tray is fixed with a center shaft, the right part of which can be installed on the frame, the fixed seed tray is provided with a seed inlet hole communicated with the outlet of the seed box, the outer part of the fixed seed tray is sleeved with an outer pressing ring, and the left end of the center shaft is provided with a rotary pressing plate. This application is rational in infrastructure and compact, convenient to use, its duckbilled contact ground and drive the wheel ring body, rotate the pressure disk and rotate, make gear drive take turns to rotate, transfer the seed to the downthehole precision volume bunch planting that realizes of seed metering, simple structure not only, easily assembly maintenance, the transmission is accurate moreover, it is accurate stable to get kind, the accessible is more taken the crop of the different particle diameters of seed sowing or kind seed, have reliable and stable nature good, get kind accurate, economic, simple and convenient, efficient characteristics.

Description

Wheel type precision dibbler

Technical Field

The application relates to the technical field of precision hill-drop planting devices for agricultural planting, in particular to a seed wheel type precision hill-drop planter.

Background

The current nest eye dibbler uses comparatively extensively before, and it generally all has the torsional spring of getting kind of a device of getting kind, owing to get kind of a torsional spring and be the vulnerable part, if get kind of a torsional spring damage then get the unable normal work of kind of a device, can cause the duckbilled of correspondence not to plant, leads to the cavity and leaks to broadcast. In addition, current pocket dibbler drive mechanism is complicated, the part is more, when the crop kind of seeding changes, because of the average particle diameter of seed changes, pocket dibbler often can't use, need to change pocket dibbler, cause the pocket dibbler that needs to purchase the different crops of being suitable for on the one hand, the input cost is great, the pocket dibbler that does not use causes relatively idle, on the other hand dismouting dibbler is comparatively loaded down with trivial details, wastes time and energy, delays the farming season easily, causes great loss. In addition, the existing seeder with the hole dibbler is often accidentally planted due to shaking of the hole sowing disc in the transportation process, so that the waste of seeds is caused.

Disclosure of Invention

An object of this application is to provide a kind of smart volume dibbler of all kinds of wheeled, has overcome above-mentioned prior art not enough, and it can effectively solve getting kind of torsional spring that current pocket dibbler exists and fragile, lead to the cavity and miss-seeding to and drive mechanism is complicated, the part is more, can't be applicable to multiple crop, change the dibbler and waste time and energy, easily hinder the problem of farming time.

The purpose of the application is realized as follows: a seed wheel type precision dibbler comprises a fixed seed plate, a central shaft, an outer pressure ring, a rotary pressure plate, an inner frame sleeve, a seed taking wheel, a gear driving device and a rotary dibbler assembly; a central shaft with the right part capable of being installed on the frame is fixed at the center of the fixed seed disc, a seed inlet hole capable of being communicated with the seed box outlet is arranged on the fixed seed disc, an outer pressing ring is sleeved outside the fixed seed disc, a rotary pressing disc is installed at the left end of the central shaft, the rotary pressing disc and the outer pressing ring are fixedly connected together through a connecting bolt and tightly pressed at the left end and the right end of the dibbler assembly, an inner frame sleeve in a cup shape is arranged at the right side of the rotary pressing disc, the opening of the inner frame sleeve faces to the right and is fixedly installed on the fixed seed disc, a seed discharging hole is arranged at the lower end of the inner frame sleeve, a seed blocking device and a seed taking wheel are installed at the lower part of the inner chamber of the inner frame sleeve, a seed chamber is formed in the inner frame sleeve at the upper part of the seed blocking device, the seed taking wheel is installed in the seed blocking device, a seed taking, the outside cover of inner frame cover is equipped with the dibbler assembly, and the dibbler assembly includes wheel rim body and duckbilled, and the duckbilled is installed to the wheel rim body outside, corresponds to and is equipped with the seed passing hole on the wheel rim body of each duckbilled position respectively, and the seed metering hole can be linked together with the duckbilled inner chamber of dibbler assembly lower extreme through the seed passing hole.

Further, gear drive includes drive gear, driven gear and shaft, the right-hand member middle part of rotation pressure disk is equipped with pressure dish heart platform, drive gear passes through parallel key fixed mounting at pressure dish heart bench, drive gear below position is equipped with kind of shaft, the left side board lower part of inner frame cover is equipped with frame cover seat hole and installs a left bearing of a wheel, install right bearing of a wheel on the fixed dish, the shaft of a wheel passes through left bearing of a wheel, right bearing of a wheel installs at the inner frame cover, fixed dish is gone up, get kind of a wheel fixed mounting in the interior intracavity of inner frame cover the shaft of a wheel, the left end of kind of shaft has driven gear through parallel key fixed mounting, driven gear's the upper end teeth of a cogwheel meshes with drive gear's lower extreme teeth.

Furthermore, a seed hole is formed in a fixed seed tray corresponding to the position of the seed taking wheel, a seed wheel cover is installed on the fixed seed tray through a seed cover screw, a seed cover shaft seat ring table is arranged in the middle of the left side of the seed wheel cover, a right wheel bearing is installed in the seed cover shaft seat ring table, a seed cover positioning ring table is arranged on the edge, close to the left side of the seed wheel cover, and the seed wheel cover is installed in the seed hole through the seed cover positioning ring table.

Further, the seed blocking device comprises a first arc plate, a second arc plate and a first baffle plate, the seed taking wheel comprises a first arc plate, a second arc plate, a seed taking wheel, a seed taking hole, a seed blocking outlet, a seed feeding hole, a seed taking wheel, a seed feeding hole and a seed feeding hole.

Furthermore, a seed cleaning scraping blade is fixed at the front part of the first baffle plate, and the front end of the seed cleaning scraping blade is pressed against the seed taking wheel.

Furthermore, the inner wall of the inner frame sleeve corresponding to the front part of the seed blocking outlet is provided with a seed cleaning brush, and the rear end of the seed cleaning brush is close to the front end of the seed discharging hole.

Further, the inner frame sleeve is fixed on the fixed seed tray through at least two frame sleeve bolts, and the right port of the inner frame sleeve is tightly pressed on the left end face of the fixed seed tray and keeps sealed.

Further, the left side middle part of fixed dish is equipped with the centering cover, the left side board middle part of inner frame cover is equipped with a frame heart hole, the inner frame cover is through frame heart hole suit in centering cover left part and keep sealed, fixed dish is installed at the center pin middle part through centering cover, the right part of center pin is equipped with the locating plane, the left part of center pin is equipped with the mandrel journal and installs the pressure disk bearing, the left end middle part of rotation pressure disk is equipped with the bearing housing hole, the inner circle suit of pressure disk bearing is fixed on the mandrel journal, the outer lane of pressure disk bearing is installed at the bearing housing downthehole, the left end outside of center pin is equipped with locking screw and fixed mounting has lock nut, lock nut's right-hand member compresses tightly at pressure disk bearing left.

This application is rational in infrastructure and compact, convenient to use, its duckbilled contact ground and drive the wheel ring body, rotate the pressure disk and rotate, make gear drive take turns to rotate, transfer the seed to the downthehole precision volume bunch planting that realizes of seed metering, simple structure not only, easily assembly maintenance, the transmission is accurate moreover, it is accurate stable to get kind, the accessible is more taken the crop of the different particle diameters of seed sowing or kind seed, have reliable and stable nature good, get kind accurate, economic, simple and convenient, efficient characteristics.

Drawings

The specific structure of the application is given by the following figures and examples:

FIG. 1 is a front sectional structural view of a preferred embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic diagram of the right-side view structure of fig. 1.

Legend: the seed sowing device comprises a fixed seed tray 1, a central shaft 2, an outer pressing ring 3, a rotating pressure plate 4, an inner frame sleeve 5, a seed taking wheel 6, a seed inlet 7, a connecting bolt 8, a seed sowing hole 9, a seed taking hole 10, a rim body 11, a duckbilled.

Detailed Description

The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.

Example (b): as shown in fig. 1-3, the wheel type precision dibbler comprises a fixed seed plate 1, a central shaft 2, an outer ring 3, a rotating pressure plate 4, an inner frame sleeve 5, a seed taking wheel 6, a gear driving device and a rotary dibbler assembly; a central shaft 2 with the right part capable of being installed on a frame is fixed at the center of a fixed seed disc 1, a seed inlet hole 7 capable of being communicated with a seed box outlet is arranged on the fixed seed disc 1, an outer pressing ring 3 is sleeved outside the fixed seed disc 1, a rotary pressing disc 4 is installed at the left end of the central shaft 2, the rotary pressing disc 4 and the outer pressing ring 3 are fixedly connected together through a connecting bolt 8 and tightly pressed at the left end and the right end of a dibbler assembly, an inner frame sleeve 5 in a cup shape is arranged at the right side of the rotary pressing disc 4, the opening of the inner frame sleeve 5 faces the right side and is fixedly installed on the fixed seed disc 1, a seed discharging hole 9 is arranged at the lower end of the inner frame sleeve 5, a seed blocking device and a seed taking wheel 6 are installed at the lower part of an inner cavity of the inner frame sleeve 5 at the upper part of the seed blocking device, a seed chamber is formed in the inner cavity of the seed blocking device, the right part of rotating pressure disk 4 is equipped with and can drives the wheel of getting 6 pivoted gear drive, and the outside cover of inner frame cover 5 is equipped with the dibbler assembly, and the dibbler assembly includes wheel circle body 11 and duckbilled 12, and duckbilled 12 is installed in the wheel circle body 11 outside, corresponds and is equipped with respectively on the wheel circle body 11 of each duckbilled 12 position and crosses hole 13, and seed metering hole 9 can be linked together with the duckbilled 12 inner chamber of dibbler assembly lower extreme through crossing hole 13. Seed in the seed case gets into the seed room by 7 entering seed holes, and when this application was rotated along the B direction, duckbilled 12 contact ground drive rim body 11, rotation pressure disk 4 and outer pressure ring 3 rotated, and rotation pressure disk 4 drives through gear drive and gets kind of a wheel 6 and rotate, gets kind of a wheel 6 and transfers the seed in the seed room to seed metering hole 9 in, realizes smart volume bunch planting through duckbilled 12. This application is through gear drive device drive seed-taking wheel 6, and is not only simple in structure, easily assembly maintenance, and the transmission is accurate, seed-taking accuracy is stable, more importantly can be according to the size of seed, the change is seed-taking wheel 6 can sow the crop of different particle diameters or grade seed, for the user practices thrift the cost of purchasing the seeding machines, seed-taking wheel 6 is seed-taking, seed-taking quantity can long-term operation guarantee reliable and accuracy nature, through actual test, the single grain rate of every cave reaches more than 90%, the cavitation rate is less than 2%, accord with user's precision seeding demand.

As shown in fig. 1-2, the gear driving device includes a driving gear 14, a driven gear 15 and a wheel shaft 16, a pressure plate center table is arranged in the middle of the right end of the rotary pressure plate 4, the driving gear 14 is fixedly mounted on the pressure plate center table through a flat key, a seed wheel shaft 16 is arranged below the driving gear 14, a frame sleeve seat hole is arranged at the lower portion of the left side plate of the inner frame sleeve 5 and is provided with a left wheel bearing 17, a right wheel bearing 18 is mounted on the fixed seed plate 1, the seed wheel shaft 16 is mounted on the inner frame sleeve 5 and the fixed seed plate 1 through the left wheel bearing 17 and the right wheel bearing 18, the seed taking wheel 6 is fixedly mounted on the seed wheel shaft 16 in the inner cavity of the inner frame sleeve 5, the driven gear 15 is fixedly mounted at the left end of the wheel shaft 16 through a flat key, and upper gear teeth of. During actual manufacturing, a wheel axle positioning plane can be arranged in the middle of the wheel axle 16, a fixing plane matched with the wheel axle positioning plane is arranged on the central hole of the seed taking wheel 6, and the seed taking wheel 6 is arranged on the seed axle 16 through the fixing plane; a right elastic retainer ring is fixed on the wheel shaft 16 corresponding to the right end position of the seed taking wheel 6, the axial movement of the seed taking wheel 6 is limited through the right elastic retainer ring, a left elastic retainer ring is fixed on the wheel shaft 16 corresponding to the right end position of the left side plate of the inner frame sleeve 5, and the axial movement of the seed taking wheel shaft 16 is limited through the left elastic retainer ring and the wheel left bearing 17. During the seeding operation, duckbilled 12 contact ground drive rotates pressure disk 4 rotatory, rotates pressure disk 4 and drives driven gear 15, wheel axle 16 through drive gear 14 and rotates for get kind of a wheel 6 rotation and get kind of operation, duckbilled 12 leaves ground when the seeder stops the operation, rotates pressure disk 4 and stops rotatoryly, thereby can make and get kind of a wheel 6 and keep static locking, no longer get kind, deposit in the duckbilled many seeds, guaranteed the precision and got kind.

As shown in fig. 1-3, a seed wheel hole 19 is formed on the fixed seed plate 1 corresponding to the position of the seed wheel 6 and a seed wheel cover 20 is installed, the seed wheel cover 20 is fixedly installed on the fixed seed plate 1 through a seed wheel cover screw 21, a seed wheel cover shaft seat ring table 22 is arranged in the middle of the left side of the seed wheel cover 20, a right wheel bearing 18 is installed in the seed wheel cover shaft seat ring table 22, a seed wheel cover positioning ring table 23 is arranged on the left side edge close to the seed wheel cover 20, and the seed wheel cover 20 is installed in the seed wheel hole 19 through the seed wheel cover positioning ring table 23. Because the seed wheel cover 20 is easy to disassemble, the seed taking wheel 6 can be conveniently replaced by taking off the seed wheel cover 20, the seed taking wheel 6 can be replaced without completely disassembling the hill planter, time and labor are saved, and the maintenance and the adjustment are more rapid and convenient.

As shown in fig. 1-2, the seed blocking device comprises a first arc plate 24, a second arc plate 25, a first baffle plate 26 and a second baffle plate 27, wherein the first arc plate 24 is pressed against the rear lower part of the seed taking wheel 6, the second arc plate 25 is pressed against the front part of the seed taking wheel 6, the lower end of the first arc plate 24 is positioned at the rear part of the seed sowing hole 9, the lower end of the second arc plate 25 is positioned in front of the seed sowing hole 9, a seed blocking outlet communicated with the seed sowing hole 9 is formed between the lower end of the first arc plate 24 and the lower end of the second arc plate 25, the first baffle plate 26 is an inclined plate inclined in the back-high and front-low directions, the rear end of the first baffle plate 26 is connected with the inner wall at the rear part of the inner frame sleeve 5, the front end of the first baffle plate 26 is connected with the upper end of the first arc plate 24 into a whole, the second baffle plate 27 is an inclined plate in the front-high and back-low directions, the front end of the second baffle plate 27 is connected with the inner wall at the front, the seed taking wheel 6 is arranged between the first arc plate 24 and the second arc plate 25 and can rotate, and the seed taking hole 10 is in a horn shape with a small inside and a large outside. Can get the leading-in seed hole 10 of getting of kind of wheel 6 of getting of seed through keeping off kind of device, during the manufacturing, make the diameter of getting kind of hole 10 slightly be greater than the average particle diameter of waiting to sow the crop seed, the degree of depth of getting kind of hole 10 is preferably 1.3 times of this kind of seed average particle diameter, gets kind of hole 10 and is the loudspeaker form seed entering of being convenient for, is convenient for the seed to pour out simultaneously, along with dead weight and get kind of wheel 6 rotation inertia and get into and keep off kind of export, seed metering downthehole 9.

As shown in fig. 1-2, a seed cleaning blade 28 is fixed to the front of the first shutter 26, and the front end of the seed cleaning blade 28 is pressed against the seed-extracting wheel 6. The seed cleaning scraper 28 is preferably made of rubber with good wear resistance, and the excess seeds in the seed taking hole 10 can be scraped by the seed cleaning scraper 28, so that precise seed taking is further ensured.

As shown in the figures 1-2, the inner wall of the inner frame sleeve 5 corresponding to the front part of the seed blocking outlet is provided with a seed cleaning brush 29, and the rear end of the seed cleaning brush 29 is close to the front end of the seed discharging hole 9. The seeds adhered in the seed taking hole 10 at the lower end of the seed taking wheel 6 can be brushed out through the seed cleaning brush 29 to assist the seeds to fall into the seed discharging hole 9, so that one seed in each seed hole is ensured, and the cavity rate is reduced.

As shown in fig. 1-2, the inner frame sleeve 5 is fixed on the fixed seed tray 1 by at least two frame sleeve bolts 30, and the right port of the inner frame sleeve 5 is pressed on the left end face of the fixed seed tray 1 and keeps sealed. During actual manufacturing, a groove can be formed in the left end face of the fixed seed tray 1 corresponding to the right end opening of the inner frame sleeve 5, the groove is clamped into the right end opening of the inner frame sleeve 5, assembling accuracy during installation can be guaranteed, and sealing performance of the contact position of the right end opening of the inner frame sleeve 5 and the left end of the fixed seed tray 1 can be further improved.

As shown in fig. 1-2, a fixed disk 1 is provided with a centering sleeve 31 in the middle of its left side, a frame sleeve hole 32 is provided in the middle of the left side plate of the inner frame sleeve 5, the inner frame sleeve 5 is sleeved on the left portion of the centering sleeve 31 through the frame sleeve hole 32 and keeps sealed, the fixed disk 1 is installed in the middle of the central shaft 2 through the centering sleeve 31, the right portion of the central shaft 2 is provided with a positioning plane, the left portion of the central shaft 2 is provided with a spindle journal and is provided with a platen bearing 33, the left end of the rotary platen 4 is provided with a bearing seat hole 34 in the middle, an inner ring of the platen bearing 33 is sleeved and fixed on the spindle journal, an outer ring of the platen bearing 33 is installed in the bearing seat hole 34, the left end of the central shaft 2 is provided with a locking thread and is fixedly provided with a locking nut 35. The sealing performance of the seed chamber can be further ensured through the centering sleeve 31, and the coating medicament powder outside the seeds is prevented from entering the gear driving device on the left side of the inner frame sleeve 5, so that the gear driving device can be ensured to work stably and reliably for a long time, and the service life of related parts is prolonged.

The foregoing description is by way of example only and is not intended as limiting the embodiments of the present application. All obvious variations and modifications of the present invention are within the scope of the present invention.

Claims

1. A kind of smart volume dibbler of seed wheel formula which characterized in that: the seeding machine comprises a fixed seed tray, a central shaft, an outer pressure ring, a rotary pressure plate, an inner frame sleeve, a seed taking wheel, a gear driving device and a rotary dibbler assembly; a central shaft with the right part capable of being installed on the frame is fixed at the center of the fixed seed disc, a seed inlet hole capable of being communicated with the seed box outlet is arranged on the fixed seed disc, an outer pressing ring is sleeved outside the fixed seed disc, a rotary pressing disc is installed at the left end of the central shaft, the rotary pressing disc and the outer pressing ring are fixedly connected together through a connecting bolt and tightly pressed at the left end and the right end of the dibbler assembly, an inner frame sleeve in a cup shape is arranged at the right side of the rotary pressing disc, the opening of the inner frame sleeve faces to the right and is fixedly installed on the fixed seed disc, a seed discharging hole is arranged at the lower end of the inner frame sleeve, a seed blocking device and a seed taking wheel are installed at the lower part of the inner chamber of the inner frame sleeve, a seed chamber is formed in the inner frame sleeve at the upper part of the seed blocking device, the seed taking wheel is installed in the seed blocking device, a seed taking, the outside cover of inner frame cover is equipped with the dibbler assembly, and the dibbler assembly includes wheel rim body and duckbilled, and the duckbilled is installed to the wheel rim body outside, corresponds to and is equipped with the seed passing hole on the wheel rim body of each duckbilled position respectively, and the seed metering hole can be linked together with the duckbilled inner chamber of dibbler assembly lower extreme through the seed passing hole.

2. The wheel precision dibbler of claim 1, wherein: gear drive includes drive gear, driven gear and shaft, the right-hand member middle part of rotation pressure disk is equipped with pressure dish heart platform, drive gear passes through parallel key fixed mounting at pressure dish heart bench, drive gear below position is equipped with kind of shaft, the left side board lower part of inner frame cover is equipped with frame cover seat hole and installs a left bearing of wheel, install right bearing of wheel on the fixed kind of dish, the shaft of wheel passes through left bearing of wheel, right bearing of wheel installs at the inner frame cover, on the fixed kind of dish, it takes kind of a kind of wheel fixed mounting to take kind of a kind of the epaxial of wheel in the inner frame cover intracavity, the left end of kind of shaft has driven gear through parallel key fixed mounting, driven gear's the upper end teeth of a cogwheel meshes.

3. The wheel precision dibbler of claim 2, wherein: the fixed seed tray corresponding to the seed taking wheel position is provided with a seed hole and a seed cover, the seed cover is fixedly arranged on the fixed seed tray through a seed cover screw, the middle part of the left side of the seed cover is provided with a seed cover shaft seat ring table, a right bearing of the seed wheel is arranged in the seed cover shaft seat ring table, a seed cover positioning ring table is arranged at the edge of the left side close to the seed cover, and the seed cover is arranged in the seed hole through the seed cover positioning ring table.

4. The wheel precision dibbler of claim 1, 2 or 3, wherein: the seed blocking device comprises a first arc plate, a second arc plate and a first baffle plate, the seed taking wheel comprises a first arc plate, a second arc plate, a seed taking wheel, a seed taking hole, a seed blocking outlet, a seed feeding hole, a seed taking wheel, a seed feeding hole and a seed feeding hole.

5. The wheel precision dibbler of claim 4, wherein: a seed cleaning scraper is fixed at the front part of the first baffle plate, and the front end of the seed cleaning scraper is pressed against the seed taking wheel; or/and the inner wall of the inner frame sleeve corresponding to the front part of the seed blocking outlet is provided with a seed cleaning brush, and the rear end of the seed cleaning brush is close to the front end of the seed discharging hole; or/and the inner frame sleeve is fixed on the fixed seed tray through at least two frame sleeve bolts, and the right port of the inner frame sleeve is tightly pressed on the left end face of the fixed seed tray and keeps sealed.

6. The wheel precision dibbler of claim 1, 2 or 3, wherein: the left side middle part of fixed dish is equipped with the centering cover, the left side board middle part of inner frame cover is equipped with a set heart hole, the inner frame cover is through a set heart hole suit at centering cover left part and keep sealed, fixed dish is installed at the center pin middle part through the centering cover, the right part of center pin is equipped with the locating plane, the left part of center pin is equipped with the mandrel journal and installs the pressure disk bearing, the left end middle part of rotation pressure disk is equipped with the bearing housing hole, the inner circle suit of pressure disk bearing is fixed on the mandrel journal, the outer lane of pressure disk bearing is installed at the bearing housing hole, the left end outside of center pin is equipped with locking screw and fixed mounting has lock nut, lock nut's right-hand member compresses tightly at pressure disk.

7. The wheel precision dibbler of claim 4, wherein: the left side middle part of fixed dish is equipped with the centering cover, the left side board middle part of inner frame cover is equipped with a set heart hole, the inner frame cover is through a set heart hole suit at centering cover left part and keep sealed, fixed dish is installed at the center pin middle part through the centering cover, the right part of center pin is equipped with the locating plane, the left part of center pin is equipped with the mandrel journal and installs the pressure disk bearing, the left end middle part of rotation pressure disk is equipped with the bearing housing hole, the inner circle suit of pressure disk bearing is fixed on the mandrel journal, the outer lane of pressure disk bearing is installed at the bearing housing hole, the left end outside of center pin is equipped with locking screw and fixed mounting has lock nut, lock nut's right-hand member compresses tightly at pressure disk.

8. The wheel precision dibbler of claim 5, wherein: the left side middle part of fixed dish is equipped with the centering cover, the left side board middle part of inner frame cover is equipped with a set heart hole, the inner frame cover is through a set heart hole suit at centering cover left part and keep sealed, fixed dish is installed at the center pin middle part through the centering cover, the right part of center pin is equipped with the locating plane, the left part of center pin is equipped with the mandrel journal and installs the pressure disk bearing, the left end middle part of rotation pressure disk is equipped with the bearing housing hole, the inner circle suit of pressure disk bearing is fixed on the mandrel journal, the outer lane of pressure disk bearing is installed at the bearing housing hole, the left end outside of center pin is equipped with locking screw and fixed mounting has lock nut, lock nut's right-hand member compresses tightly at pressure disk.