CN211707108U

CN211707108U - Wheat washing and stone removing spin dryer

Info

Publication number: CN211707108U
Application number: CN201921875659.6U
Authority: CN
Inventors: 刘艳飞; 刘洪宝; 张全友
Original assignee: Shandong Jiashibo Grain And Oil Food Co ltd
Current assignee: Shandong Jiashibo Grain And Oil Food Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-10-20
Anticipated expiration: 2029-11-01

Abstract

The utility model relates to the technical field of auxiliary devices for flour food processing, in particular to a wheat washing and stone removing spin dryer; the automatic wheat picking and placing device is relatively automatic in operation, all wheat raw materials in the placing rack can be conveniently picked and placed, the working efficiency of the device can be effectively improved, and convenience is brought to a user; still include mount, servo motor, connecting plate, drive board, baffle, two sets of slide rails and retrieve the frame, servo motor's output is provided with the driving roller to be provided with drive gear on the driving roller, the left end of connecting plate is provided with the fly leaf, and be provided with the multiunit on the fly leaf and drive the groove, the top of retrieving the frame is provided with the accumulator, the baffle is articulated to be installed on getting and putting the mouth, the standing groove bottom is provided with the guide plate.

Description

Wheat washing and stone removing spin dryer

Technical Field

The utility model relates to a technical field of flour food processing auxiliary device especially relates to a wash wheat and remove stone drier.

Background

As is well known, a wheat washing and stone removing spin dryer is a device for spin-drying sand and stone impurities in collected wheat food raw materials or moisture attached to the surface of a venule raw material so as to improve the cleanliness of the wheat raw materials used for processing wheaten food, thereby improving the safety of wheaten food processing, and is widely used in the field of wheaten food processing; the existing wheat washing and stone removing spin dryer comprises a machine case, a driving motor, a supporting plate, a placing frame and a net frame, wherein a working cavity is arranged in the machine case, a feeding hole is formed in the top end of the machine case and is communicated with the working cavity, a cover plate is hinged to the side wall of a taking and placing opening, a water discharging pipe is arranged at the right end of the machine case, a water discharging valve is arranged on the water discharging pipe, a partition plate is fixedly arranged in the working cavity, the driving motor is fixedly arranged at the bottom end of the partition plate, a transmission shaft is arranged at the top end of the top of the driving motor, the supporting plate is fixedly arranged at the top end of the transmission shaft, the placing frame is fixedly arranged at the top end of the supporting plate; when the existing wheat washing and stone removing spin dryer is used, a user can open the cover plate and place wheat raw materials needing impurity cleaning in the placing groove, the driving motor is started to drive the supporting plate to rotate through the transmission shaft, the supporting plate can drive the placing frame to rotate and clean moisture and impurities on the surface of the wheat by using centrifugal force, and after the work is finished, the drain valve is opened to discharge waste water in the work cavity; however, the existing wheat washing and stone removing drying machine is found to be inconvenient to operate when in use, and is inconvenient to take and place all the wheat raw materials in the placing rack, so that the working efficiency of the device is low, inconvenience is brought to a user, and the use reliability of the device is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an operation is comparatively automatic, conveniently gets the whole wheat raw materials of rack and puts, can effectual improvement device's work efficiency, offers convenience for the user to improve its wheat that uses reliability and remove the stone drier.

The utility model discloses a wheat washing and stone removing spin dryer, which comprises a machine case, a driving motor, a supporting plate, a placing frame and a net rack, wherein a working cavity is arranged in the machine case, the top end of the machine case is provided with a feeding hole, the feeding hole is communicated with the working cavity, a cover plate is hinged on the side wall of the taking and placing hole, the right end of the machine case is provided with a drain pipe, a drain valve is arranged on the drain pipe, a partition plate is fixedly arranged in the working cavity, the driving motor is fixedly arranged at the bottom end of the partition plate, the top output end of the driving motor is provided with a transmission shaft, the supporting plate is fixedly arranged at the top end of the transmission shaft, the placing frame is fixedly arranged at the top; the automatic recovery device comprises a fixed frame, a servo motor, a connecting plate, a driving plate, a baffle, two sets of sliding rails and a recovery frame, wherein the fixed frame is fixedly arranged in a placing groove, a fixed groove is formed in the bottom end of the fixed frame, the mounting frame is fixedly arranged in the fixed groove, a movable motor is arranged on the side wall of the mounting frame, a transmission roller is arranged at the output end of the servo motor, a transmission gear is arranged on the transmission roller, the left end of the connecting plate is provided with the driving plate, the movable plate is provided with a plurality of groups of driving grooves, the bottom end of the connecting plate is connected with the top end of the driving plate, the bottom end of the driving plate is provided with a top plate, the net frame is fixedly arranged at the bottom end of the top plate, the two sets of sliding rails are respectively arranged at the front side and the rear side of a working cavity, the two, the top of retrieving the frame is provided with the accumulator, and the quick-witted case right-hand member is provided with gets and puts the mouth to get and put the mouth and communicate with each other with the working chamber, the baffle is articulated to be installed on getting and putting the mouth, and the standing groove bottom is provided with the guide plate.

The utility model discloses a wash wheat and remove stone drier still includes two sets of spacing framves and two sets of rubber rings, and two sets of spacing framves are fixed mounting respectively on the left side and the right side of fixed slot, and are two sets of spacing frame's bottom is provided with the spacing groove, and the top of connecting plate and driving plate all is provided with the gag lever post, and is two sets of the gag lever post top is inserted to two sets of spacing inslot, and two sets of rubber rings are fixed mounting respectively in the bottom of two sets of spacing framves to the inside wall of two sets of rubber rings contacts with the lateral wall of gag.

The utility model discloses a wash wheat and remove stone drier still includes transparent plate, fixed knot and clean board, is provided with the observation hole on the lateral wall of machine case, and observe the hole and place the chamber and communicate with each other, transparent plate fixed mounting is on observing the hole, and fixed knot is fixed on the lateral wall of clean board, and the lateral wall is provided with the spread groove before the working chamber, and fixed knot inserts to the spread groove in, be provided with the foam-rubber cushion on the clean board, and the foam-rubber cushion contacts with the transparent plate, is provided with the rocker on the clean board, the rocker stretches out to the outside of working chamber.

The utility model discloses a wash wheat and remove stone drier still includes four group's landing legs and push rods, and four group's landing legs are installed respectively at the left front side of quick-witted bottom end, right front side, left rear side and right rear side, four group's landing leg bottoms all are provided with the base, and the front side and the rear side of quick-witted case right side wall are provided with two sets of supports respectively, the front end and the rear end of push rod respectively with two sets of leg joint.

The utility model discloses a wash wheat and remove stone drier still includes two sets of arm-tie, the top of apron and the right-hand member of baffle are provided with two sets of kerfs respectively, and two sets of arm-tie difference fixed mounting are two sets of in the kerfs.

The utility model discloses a wash wheat and remove stone drier still includes ultraviolet lamp and quartz plate, is provided with the draw-in groove on the lateral wall of working chamber, the right side and the left side in the draw-in groove are installed respectively to ultraviolet lamp and quartz plate.

The utility model discloses a wash wheat and remove stone drier still includes two sets of first bracing pieces and two sets of second bracing pieces, and the front side and the rear side in the work cavity are provided with two sets of bottom plates respectively, and two sets of first bracing piece bottoms are articulated respectively and are installed on the top of two sets of bottom plates, and the top of two sets of second bracing pieces is articulated respectively and is installed the left side and the right side of apron bottom, inside two sets of second bracing piece bottoms inserted the top of two sets of first bracing pieces respectively, two sets of first bracing piece tops all were provided with the gasket, and are two sets of the gasket contacts with two sets of second bracing pieces respectively.

The utility model discloses a wash wheat and remove stone drier still includes the sealing washer, and sealing washer fixed mounting is on the top of baffle, be provided with the multiunit through-hole on the sealing washer to the inside wall of multiunit through-hole contacts with the lateral wall of transmission shaft.

Compared with the prior art, the beneficial effects of the utility model are that: servo motor work accessible driving roller is rotatory to drive gear simultaneously and rotates, drive gear rotates and can drive the fly leaf and remove and drive the connecting plate simultaneously and remove, drive the high position that the board removed the accessible roof and adjusted the rack, make the standing groove in the raw materials enter into to the accumulator under the effect of guide plate in, its operation is comparatively automatic, conveniently get the whole wheat raw materials of rack and put, can effectual improvement device's work efficiency, bring the facility for the user to improve its use reliability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the internal structure of the fixing frame;

FIG. 3 is a schematic view of a right side view of the cleaning plate and transparent plate;

FIG. 4 is a schematic view of the structure of the first support bar and the second support bar;

in the drawings, the reference numbers: 1. a chassis; 2. a drive motor; 3. a support plate; 4. placing a rack; 5. A net frame; 6. a drain valve; 7. a partition plate; 8. a fixed mount; 9. a servo motor; 10. driving the plate; 11. a baffle plate; 12. a slide rail; 13. a recycling rack; 14. a mounting frame; 15. a transmission gear; 16. a movable plate; 17. a top plate; 18. a baffle; 19. a limiting frame; 20. a limiting rod; 21. A transparent plate; 22. cleaning the plate; 23. a sponge cushion; 24. a rocker; 25. a support leg; 26. a push rod; 27. a base; 28. pulling a plate; 29. an ultraviolet lamp; 30. a quartz plate; 31. a first support bar; 32. a second support bar; 33. and (5) sealing rings.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the utility model discloses a wheat washing and stone removing spin dryer, which comprises a case 1, a driving motor 2, a supporting plate 3, a placing rack 4 and a net rack 5, a working chamber is arranged in the case 1, a feed inlet is arranged at the top end of the case 1, the feed inlet is communicated with the working chamber, a cover plate is hinged on the side wall of a taking and placing opening, a drain pipe is arranged at the right end of the case 1, a drain valve 6 is arranged on the drain pipe, a partition plate 7 is fixedly arranged in the working chamber, the driving motor 2 is fixedly arranged at the bottom end of the partition plate 7, the output end at the top of the driving motor 2 is provided with a transmission shaft, the supporting plate 3 is fixedly arranged at the top end of the transmission shaft, the placing rack 4 is fixedly arranged at the top end of the supporting plate; the automatic cleaning device also comprises a fixed frame 8, a servo motor 9, a connecting plate, a driving plate 10, a baffle 11, two groups of slide rails 12 and a recovery frame 13, wherein the fixed frame 8 is fixedly arranged in the placing groove, the bottom end of the fixed frame 8 is provided with a fixed groove, the fixed groove is fixedly provided with the mounting frame 14, the movable motor is arranged on the side wall of the mounting frame 14, the output end of the servo motor 9 is provided with a driving roller, a transmission gear 15 is arranged on the driving roller, the left end of the connecting plate is provided with a movable plate 16, the movable plate 16 is provided with a plurality of groups of driving grooves, the bottom end of the connecting plate is connected with the top end of the driving plate 10, the bottom end of the driving plate 10 is provided with a top plate 17, the net frame 5 is fixedly arranged at the bottom end of the top plate 17, the two groups of slide rails 12 are, the front end and the rear end of a recovery frame 13 are respectively clamped in the two groups of sliding grooves, the top end of the recovery frame 13 is provided with a recovery groove, the right end of the case 1 is provided with a taking and placing opening which is communicated with the working cavity, the baffle 11 is hinged on the taking and placing opening, and the bottom end of the placing groove is provided with a guide plate 18; servo motor work accessible driving roller is rotatory to drive gear simultaneously and rotates, drive gear rotates and can drive the fly leaf and remove and drive the connecting plate simultaneously and remove, drive the high position that the board removed the accessible roof and adjusted the rack, make the standing groove in the raw materials enter into to the accumulator under the effect of guide plate in, its operation is comparatively automatic, conveniently get the whole wheat raw materials of rack and put, can effectual improvement device's work efficiency, bring the facility for the user to improve its use reliability.

The utility model discloses a wheat washing and stone removing spin dryer, which also comprises two groups of limiting frames 19 and two groups of rubber rings, wherein the two groups of limiting frames 19 are respectively and fixedly arranged on the left side and the right side of the fixed groove, the bottom ends of the two groups of limiting frames 19 are provided with limiting grooves, the top ends of the connecting plate and the driving plate 10 are respectively provided with a limiting rod 20, the top ends of the two groups of limiting rods 20 are inserted into the two groups of limiting grooves, the two groups of rubber rings are respectively and fixedly arranged at the bottom ends of the two groups of limiting frames 19, and the inner side walls of the two groups of rubber rings; the connecting plate can drive two sets of limiting rods to move while moving with the driving plate, the limiting frame can limit the moving range of the limiting rods, and the moving stability of the driving plate and the top plate can be improved.

The utility model discloses a wheat washing and stone removing drier, which also comprises a transparent plate 21, a fixing buckle and a cleaning plate 22, wherein an observation hole is arranged on the side wall of the case 1 and is communicated with the placing cavity, the transparent plate 21 is fixedly arranged on the observation hole, the fixing buckle is fixed on the side wall of the cleaning plate 22, the side wall of the front part of the working cavity is provided with a connecting groove, the fixing buckle is inserted into the connecting groove, the cleaning plate 22 is provided with a sponge pad 23, the sponge pad 23 is contacted with the transparent plate 21, the cleaning plate 22 is provided with a rocker 24, and the rocker 24 extends out of the working cavity; the user can see the inside behavior of working chamber through the transparent plate, and the user waves the rocker and can drive the cleaning board and remove when needing to drive the foam-rubber cushion and remove and clean the transparent plate.

The utility model discloses a wheat washing and stone removing drying machine, which also comprises four groups of supporting legs 25 and a push rod 26, wherein the four groups of supporting legs 25 are respectively arranged at the left front side, the right front side, the left rear side and the right rear side of the bottom end of the machine case 1, the bottom ends of the four groups of supporting legs 25 are respectively provided with a base 27, the front side and the rear side of the right side wall of the machine case 1 are respectively provided with two groups of supports, and the front end and the rear end of the push rod 26 are respectively connected with the two groups of supports; the user pushes the push rod to drive the two groups of supports to drive the case to move, and the case can drive the four groups of supporting legs to move so as to integrally move the device to a proper position.

The utility model discloses a wheat washing and stone removing spin dryer, which also comprises two groups of pulling plates 28, wherein the top end of the cover plate and the right end of the baffle plate 11 are respectively provided with two groups of pulling grooves, and the two groups of pulling plates 28 are respectively and fixedly arranged in the two groups of pulling grooves; the user pulls the pulling plate to respectively drive the baffle and the cover plate to move so as to facilitate the user to open or close the baffle and the cover plate.

The wheat washing and stone removing spin dryer of the utility model also comprises an ultraviolet lamp 29 and a quartz plate 30, a clamping groove is arranged on the side wall of the working chamber, and the ultraviolet lamp 29 and the quartz plate 30 are respectively arranged on the right side and the left side in the clamping groove; the ultraviolet lamp radiates ultraviolet rays to perform sterilization and disinfection treatment on the working cavity, so that the practicability of the device is improved.

The utility model discloses a wheat washing and stone removing drier, which also comprises two groups of first supporting rods 31 and two groups of second supporting rods 32, wherein the front side and the rear side in the working cavity are respectively provided with two groups of bottom plates, the bottom ends of the two groups of first supporting rods 31 are respectively hinged and installed at the top ends of the two groups of bottom plates, the top ends of the two groups of second supporting rods 32 are respectively hinged and installed at the left side and the right side of the bottom end of the cover plate, the bottom ends of the two groups of second supporting rods 32 are respectively inserted into the top ends of the two groups of first supporting rods 31, the top ends of the two groups of first supporting rods 31 are respectively provided with gaskets; first bracing piece and second bracing piece can support the baffle when the user opens the baffle, can improve the stability of user baffle when opening the baffle.

The utility model discloses a wheat washing and stone removing spin dryer, which also comprises a sealing ring, wherein the sealing ring is fixedly arranged at the top end of the clapboard 7, a plurality of groups of through holes are arranged on the sealing ring 33, and the inner side walls of the plurality of groups of through holes are contacted with the outer side wall of the transmission shaft; the sealing washer can keep apart the sanitizer of baffle top, prevents that its seepage from causing the influence to driving motor's work below the baffle.

The utility model relates to a wheat washing and stone removing spin dryer, when in work, a user firstly pushes a push rod to drive two groups of brackets and drive a machine case to move, the machine case can drive four groups of supporting legs to move so as to integrally move the device to a proper position, the user pulls a pull plate to respectively drive a baffle and a cover plate to move so as to facilitate the user to open or close the baffle and the cover plate, a first supporting rod and a second supporting rod can support the baffle when the user opens the baffle, the stability of the baffle when the user opens the baffle can be improved, the user can open the cover plate and place wheat raw materials needing impurity cleaning in a placing groove, a driving motor can be opened to drive a supporting plate to rotate through a transmission shaft, the supporting plate can drive a placing frame to rotate and clean moisture impurities on the surface of the wheat by utilizing centrifugal force, after the work is finished, a drain valve is opened to discharge wastewater in a, the servo motor can rotate through the driving roller and drive the transmission gear to rotate, the transmission gear rotates to drive the movable plate to move and drive the connecting plate to move, the height position of the net rack can be adjusted through the top plate by the driving plate, so that raw materials in the placing groove enter the recovery groove under the action of the guide plate, the operation is more automatic, all wheat raw materials in the placing rack can be conveniently taken and placed, the working efficiency of the device can be effectively improved, convenience is brought to a user, the connecting plate and the driving plate can drive two groups of limiting rods to move while moving, the limiting frames can limit the moving range of the limiting rods, the moving stability of the driving plate and the top plate can be improved, the user can observe the internal working condition of the working cavity through the transparent plate, the user can shake the rocker to drive the cleaning plate to move to drive the sponge cushion to wipe the transparent plate when, ultraviolet lamp radiation ultraviolet can carry out the disinfection of disinfecting to the work intracavity, and the sealing washer can keep apart the sanitizer of baffle top, prevents that its seepage from causing the influence to driving motor's work below the baffle.

The utility model relates to a wheat washing and stone removing drier, under the condition of not explaining the contrary, "up-down, left-right, front-back, inside-outside, vertical and horizontal" and other directional words included in the term only represent the direction of the term in the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the terms "first," "second," and "()" do not denote any particular quantity or order, but rather are used to distinguish one name from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A wheat washing and stone removing spin dryer comprises a machine case (1), a driving motor (2), a support plate (3), a placing frame (4) and a net frame (5), wherein a working chamber is arranged in the machine case (1), a feeding hole is formed in the top end of the machine case (1) and communicated with the working chamber, a cover plate is hinged on the side wall of a taking and placing opening, a drainage pipe is arranged at the right end of the machine case (1), a drainage valve (6) is arranged on the drainage pipe, a partition plate (7) is fixedly arranged in the working chamber, the driving motor (2) is fixedly arranged at the bottom end of the partition plate (7), a transmission shaft is arranged at the output end of the top of the driving motor (2), the support plate (3) is fixedly arranged at the top end of the transmission shaft, the placing frame (4) is fixedly arranged at the top end of the support plate (3, and the plurality of groups of through holes are communicated with the placing groove; the device is characterized by further comprising a fixed frame (8), a servo motor (9), a connecting plate, a driving plate (10), a baffle plate (11), two groups of sliding rails (12) and a recovery frame (13), wherein the fixed frame (8) is fixedly arranged in the placing groove, the bottom end of the fixed frame (8) is provided with a fixed groove, the fixed groove is fixedly provided with an installation frame (14), a movable motor is arranged on the side wall of the installation frame (14), the output end of the servo motor (9) is provided with a transmission roller, the transmission roller is provided with a transmission gear (15), the left end of the connecting plate is provided with a movable plate (16), the movable plate (16) is provided with a plurality of groups of driving grooves, the bottom end of the connecting plate is connected with the top end of the driving plate (10), the bottom end of the driving plate (10) is provided with a top plate (17), the net frame (5) is fixedly arranged at the bottom, two sets of slide rails (12) are respectively fixed mounting on the preceding lateral wall and the rear side wall of working chamber, all are provided with the spout on the lateral wall of two sets of slide rails (12), and the front end and the rear end of retrieving frame (13) clamp respectively in two sets of spouts, the top of retrieving frame (13) is provided with the accumulator, and quick-witted case (1) right-hand member is provided with gets puts the mouth to get and put the mouth and communicate with each other with the working chamber, baffle (11) articulated the installing on getting puts the mouth, and the accumulator bottom is provided with guide plate (18).

2. The wheat washing and stone removing dryer as claimed in claim 1, further comprising two sets of limiting frames (19) and two sets of rubber rings, wherein the two sets of limiting frames (19) are respectively and fixedly installed on the left side and the right side of the fixing groove, the bottom ends of the two sets of limiting frames (19) are provided with limiting grooves, the top ends of the connecting plate and the driving plate (10) are provided with limiting rods (20), the top ends of the two sets of limiting rods (20) are inserted into the two sets of limiting grooves, the two sets of rubber rings are respectively and fixedly installed at the bottom ends of the two sets of limiting frames (19), and the inner side walls of the two sets of rubber rings are in contact with the outer side walls of the limiting rods (20.

3. A wheat washing and stone removing dryer as claimed in claim 2, further comprising a transparent plate (21), a fixing buckle and a cleaning plate (22), wherein the side wall of the cabinet (1) is provided with an observation hole, the observation hole is communicated with the placing cavity, the transparent plate (21) is fixedly arranged on the observation hole, the fixing buckle is fixed on the side wall of the cleaning plate (22), the front side wall of the working cavity is provided with a connecting groove, the fixing buckle is inserted into the connecting groove, the cleaning plate (22) is provided with a sponge pad (23), the sponge pad (23) is in contact with the transparent plate (21), the cleaning plate (22) is provided with a rocker (24), and the rocker (24) extends out of the working cavity.

4. A wheat washing and stone removing dryer as claimed in claim 3, further comprising four sets of legs (25) and a push rod (26), wherein the four sets of legs (25) are respectively installed at the left front side, the right front side, the left rear side and the right rear side of the bottom end of the cabinet (1), the bottom ends of the four sets of legs (25) are respectively provided with a base (27), the front side and the rear side of the right side wall of the cabinet (1) are respectively provided with two sets of brackets, and the front end and the rear end of the push rod (26) are respectively connected with the two sets of brackets.

5. A wheat washing and stone removing drier as claimed in claim 4, further comprising two sets of pulling plates (28), wherein two sets of pulling grooves are respectively formed at the top end of the cover plate and the right end of the baffle plate (11), and the two sets of pulling plates (28) are respectively fixedly installed in the two sets of pulling grooves.

6. A wheat wash and stone removal dryer as claimed in claim 5 further comprising an ultraviolet lamp (29) and a quartz plate (30), wherein the side wall of the working chamber is provided with a slot, and the ultraviolet lamp (29) and the quartz plate (30) are respectively installed at the right side and the left side in the slot.

7. A wheat washing and stone removing dryer as claimed in claim 6, further comprising two sets of first support rods (31) and two sets of second support rods (32), wherein two sets of bottom plates are respectively disposed at the front side and the rear side of the working chamber, the bottoms of the two sets of first support rods (31) are respectively and hingedly mounted at the top ends of the two sets of bottom plates, the tops of the two sets of second support rods (32) are respectively and hingedly mounted at the left side and the right side of the bottom end of the cover plate, the bottoms of the two sets of second support rods (32) are respectively inserted into the tops of the two sets of first support rods (31), gaskets are disposed at the top ends of the two sets of first support rods (31), and the two sets of gaskets are respectively in contact with the two sets of second support rods (32).

8. A wheat washing and stone removing dryer as claimed in claim 7 further comprising a sealing ring fixedly mounted on the top end of the partition plate (7), wherein a plurality of sets of through holes are provided on the sealing ring (33), and the inner side walls of the plurality of sets of through holes are in contact with the outer side wall of the transmission shaft.