CN111700717B

CN111700717B - Bone meal propeller

Info

Publication number: CN111700717B
Application number: CN202010614100.9A
Authority: CN
Inventors: 郭毅军; 邱德洪
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-09-10
Anticipated expiration: 2040-06-30
Also published as: CN111700717A

Abstract

The invention relates to a bone meal propeller, which comprises a catheter, a cover body, an ejector rod, a nut, a screw rod, an anti-rotation piece and a driving component. The conduit is connected to the cover body. The ejector rod is movably arranged in the conduit and the cover body. The nut is rotatably arranged in the housing, the driving component is used for driving the nut to rotate, and the nut is sleeved on the screw rod. The screw rod is movably arranged in the housing, the screw rod is connected with the top rod, and a guide groove is arranged on the side wall of the screw rod along the axial direction. The anti-rotation piece is arranged on the cover body, the anti-rotation piece is provided with a guide block which is guided and matched with the guide groove, and the guide block is arranged in the guide groove. When the nut rotates, the screw is driven to move, and the anti-rotation part prevents the screw from rotating, so that the screw moves in the axial direction. When the screw moves, it drives the ejector to move simultaneously, and pushes the bone powder in the catheter outward and presses it into the corresponding In the hole position, the filling efficiency can be improved, the filling operation time is short, the bone powder can be filled, and the operation time can be reduced, which is beneficial to the recovery of the patient.

Description

Bone meal propeller

Technical Field

The invention relates to the technical field of medical instruments, in particular to a bone powder propeller.

Background

In the surgical treatment of scaphoid fracture of the wrist, for example, it is necessary to cut autologous bone taken from another part of a patient to form bone powder and then fill the bone powder into the hole of the scaphoid fracture of the wrist. In the prior art, a filler rod is generally used for slowly filling the cut autologous bone into a hole at the fracture part of the scaphoid bone, so that the filling efficiency is low, the filling operation time is long, and the filling is not solid.

Disclosure of Invention

Based on this, it is necessary to overcome the defects of the prior art, and provide a bone meal pusher, which can improve the filling efficiency, has short filling operation time, ensures bone meal filling, can reduce the operation time, and is beneficial to the recovery of patients.

The technical scheme is as follows: a bone meal pusher, comprising: the device comprises a guide pipe, a cover body and a mandril, wherein the guide pipe is connected with the cover body, and the mandril is movably arranged in the guide pipe and the cover body; the planetary gear is meshed with the inner gear ring, the planetary gear is also meshed with the sun gear, a threaded through hole matched with the lead screw is formed in the middle of the sun gear, the lead screw is sleeved in the threaded through hole and movably arranged in the cover body, the lead screw is connected with the ejector rod, and a guide groove is formed in the side wall of the lead screw along the axial direction; the anti-rotation part is arranged on the cover body or the planet carrier, a guide block which is in guide fit with the guide groove is arranged on the anti-rotation part, and the guide block is arranged in the guide groove; when the guide block is in work, the inner gear ring is driven to rotate, the inner gear ring drives the planet wheel to rotate, the planet wheel drives the sun wheel to rotate, the sun wheel drives the screw rod to move along the axial direction under the guide effect of the guide block, and the screw rod drives the ejector rod to move along the axial direction in the guide pipe when moving.

The bone meal propeller comprises a guide block, a sun wheel, a guide rod, a guide block, a guide rod, a push rod, a guide block and a bone meal pushing device, wherein the guide block is arranged in the guide block, the guide block is arranged in the guide rod, the inner gear ring is driven to rotate, the planet wheel is driven to act when rotating, the planet wheel drives the sun wheel to rotate when acting, the rotation preventing part can prevent the lead screw from rotating, the lead screw can move along the axial direction under the guide effect of the guide block, the push rod synchronously drives the push rod to move when moving along the axial direction, the push rod pushes out the bone meal in the guide pipe outwards, and the bone meal is pressed into and filled into corresponding hole sites. On one hand, the screw rod is driven to move forwards through the combination of the inner gear ring, the planet wheel and the sun wheel, so that a larger positive pressure can be provided, the stroke is controllable, the filling efficiency can be improved, the filling operation time is short, the bone powder filling is ensured, the operation time can be reduced, and the recovery of patients is facilitated; on the other hand, the planetary speed-increasing screw rod propulsion mode is adopted, the relatively few number of turns of the inner gear ring can realize the larger stroke of the screw rod, the labor intensity of doctors can be greatly reduced, the filling time is greatly shortened, the operation time can be reduced, the damage to patients is reduced, and the later recovery of the patients is also facilitated.

In one embodiment, one end of the ejector rod, which is far away from the screw rod, is provided with a lead-in inclined plane; one end of the ejector rod connected with the screw rod is a spherical end, the screw rod is provided with a concave surface corresponding to the spherical end, and the spherical end can be rotatably arranged in the concave surface; or the ejector rod is connected with the screw rod in a welding mode.

In one embodiment, the rotation preventing member includes a collar disposed in the planet carrier, the inner wall of the collar is provided with the guide block, the outer wall of the collar is provided with a limit block, the planet carrier is provided with a limit groove corresponding to the limit block, and the limit block is inserted into the limit groove.

In one embodiment, the number of the guide blocks is two, the two guide blocks are oppositely arranged on the inner wall of the ferrule, the number of the guide grooves is two, and the two guide blocks and the two guide grooves are arranged in one-to-one correspondence; the number of the limiting blocks is two, the two limiting blocks are oppositely arranged on the outer wall of the ferrule, the number of the limiting grooves is two, and the two limiting blocks and the two limiting grooves are arranged in a one-to-one correspondence mode.

In one embodiment, the cover body comprises a front cover body and a rear cover body, one end of the front cover body is connected with the guide pipe, and the inner gear ring is rotatably arranged between the other end of the front cover body and the rear cover body.

In one embodiment, the planet carrier comprises two connecting blocks, wherein one connecting block is fixedly connected with the front cover body, and the other connecting block is fixedly connected with the rear cover body; the planet carrier also comprises a connecting piece for connecting the two connecting blocks and more than two positioning pins for connecting the two connecting blocks; more than two planet wheels are rotatably arranged on more than two positioning pins in a one-to-one correspondence manner.

In one embodiment, the bone meal propeller further comprises an outer bearing and an inner bearing, the outer bearing is sleeved between the planet carrier and the inner gear ring, and the inner bearing is sleeved between the sun gear and the planet carrier.

In one embodiment, the length of the inner gear ring in the axial direction is greater than the length of the planet gears in the axial direction, the inner gear ring comprises a first middle section and two first peripheral sections connected to two sides of the first middle section, the first middle section is provided with a rack meshed with the planet gears, and the outer bearing is arranged between the first peripheral sections and the connecting block; the end part of one of the first peripheral sections is rotatably sleeved on the front cover body, and the end part of the other first peripheral section is rotatably sleeved on the rear cover body; the length of the sun wheel in the axial direction is larger than that of the planet wheel in the axial direction, the sun wheel comprises a second middle section and two second peripheral sections connected to two sides of the second middle section, the second middle section is provided with a rack meshed with the planet wheel, and the inner bearing is arranged between the second peripheral sections and the connecting blocks.

In one embodiment, the positioning pin comprises a flat section, the flat section is rotatably arranged in the shaft hole of the planet wheel, and the outer wall of the flat section is matched with the wall of the shaft hole of the planet wheel to form an oil storage space.

In one embodiment, the outer wall of the cover body is provided with an anti-skid structure; and an anti-skidding structure is arranged on the outer wall of the inner gear ring.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the bone meal pusher according to an embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of the bone meal pusher in an embodiment of the present invention;

FIG. 3 is a cross-sectional view at A-A of FIG. 2;

FIG. 4 is a schematic view of a screw rod of the bone powder pusher according to an embodiment of the present invention;

FIG. 5 is an axial cross-sectional view of a screw of the bone powder pusher according to an embodiment of the present invention;

FIG. 6 is a schematic view of an anti-rotation member of the bone powder pusher according to an embodiment of the present invention;

FIG. 7 is a structural view of another view of the rotation prevention member of the bone powder pusher according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of the bone powder pusher with the duct and the transition handle connected together according to an embodiment of the present invention;

fig. 9 is a schematic view of a structure of a front cover of the bone-powder pusher according to an embodiment of the present invention;

FIG. 10 is a schematic view of another perspective structure of the front housing of the bone-powder pusher according to an embodiment of the present invention;

fig. 11 is a schematic view of a structure of an inner gear ring of the bone powder propeller according to an embodiment of the present invention;

fig. 12 is a schematic view of another perspective structure of the inner gear ring of the bone powder propeller according to an embodiment of the invention;

FIG. 13 is a view of a structure of a locating pin of the bone meal pusher according to an embodiment of the present invention;

FIG. 14 is a view of another perspective of the locating pin of the bone meal pusher according to an embodiment of the present invention;

FIG. 15 is a view structure diagram of a planetary gear of the bone powder pusher according to an embodiment of the present invention;

FIG. 16 is a structural diagram of a planet wheel of the bone powder pusher mounted on a positioning pin according to an embodiment of the present invention;

FIG. 17 is a schematic view of a connection block of the bone meal pusher according to an embodiment of the present invention;

FIG. 18 is a schematic view of another connection block of the bone meal pusher according to an embodiment of the present invention;

FIG. 19 is a schematic view of another connection block of the bone meal pusher according to an embodiment of the present invention;

FIG. 20 is a schematic view of another connection block of the bone meal pusher according to an embodiment of the present invention;

FIG. 21 is a schematic view of another connection block of the bone meal pusher according to an embodiment of the present invention;

fig. 22 is a schematic structural view of a sun gear of the bone meal pusher according to an embodiment of the present invention.

10. A conduit; 20. a cover body; 21. a first end panel; 211. a first through hole; 212. a first seal ring; 22. a front cover body; 23. a rear cover body; 30. a top rod; 40. an inner gear ring; 41. a first middle section; 411. a rack; 42. a first peripheral section; 50. a planet carrier; 51. connecting blocks; 511. connecting holes; 512. a pin hole; 52. a limiting groove; 53. a connecting member; 54. positioning pins; 541. a flattened section; 60. a planet wheel; 61. a shaft hole; 70. a sun gear; 71. a threaded through hole; 72. a second middle section; 721. a rack; 73. a second peripheral section; 80. a screw rod; 81. a guide groove; 91. an anti-rotation member; 911. a guide block; 912. a ferrule; 913. a limiting block; 92. a transition shank body; 921. a jack; 922. a channel; 93. bone meal filling rods; 94. an outer bearing; 95. an inner bearing; 96. and (4) an anti-skid structure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2, fig. 1 shows a schematic structural view of a bone powder pusher according to an embodiment of the present invention, and fig. 2 shows an axial cross-sectional view of the bone powder pusher according to an embodiment of the present invention. A bone meal propeller comprises a catheter 10, a cover body 20, a push rod 30, an inner gear ring 40, a planet carrier 50, a planet wheel 60, a sun wheel 70, a screw rod 80 and an anti-rotation part 91.

Referring to fig. 2 and 3, fig. 3 illustrates a cross-sectional view of fig. 2 at a-a. The catheter 10 is connected to the housing 20. The ejector 30 is movably disposed in the catheter 10 and the housing 20. The ring gear 40 is rotatably disposed on the cover 20. The planet carrier 50 is fixedly disposed on the cover 20. The number of the planetary gear 60 is two or more, and the two or more planetary gear 60 are rotatably provided on the planetary carrier 50. The sun gear 70 is arranged in the middle of the inner gear ring 40, the planet gears 60 are meshed with the inner gear ring 40, and the planet gears 60 are also meshed with the sun gear 70. The middle part of the sun gear 70 is provided with a thread through hole 71 matched with the screw rod 80. The screw rod 80 is sleeved in the threaded through hole 71, the screw rod 80 is movably arranged in the cover body 20, and the screw rod 80 is connected with the ejector rod 30. The rotation preventing member 91 is disposed on the cover 20 or the planet carrier 50.

Referring to fig. 4 to 7, fig. 4 shows a structure diagram of a lead screw 80 of the bone powder pusher according to an embodiment of the present invention, fig. 5 shows an axial cross-sectional view of the lead screw 80 of the bone powder pusher according to an embodiment of the present invention, and fig. 6 and 7 respectively show two different structure diagrams of an anti-rotation member 91 of the bone powder pusher according to an embodiment of the present invention. A guide groove 81 is provided on a side wall of the screw rod 80 along an axial direction. The rotation preventing member 91 is provided with a guide block 911 which is in guide fit with the guide groove 81. The guide block 911 is disposed in the guide groove 81.

When the bone meal propeller works, the inner gear ring 40 is driven to rotate, the inner gear ring 40 drives the planet wheel 60 to act when rotating, the planet wheel 60 drives the sun wheel 70 to rotate when acting, the anti-rotation piece 91 can prevent the screw rod 80 from rotating, meanwhile, under the guiding action of the guide block 911, the screw rod 80 moves along the axial direction, the screw rod 80 synchronously drives the ejector rod 30 to move when moving along the axial direction, and the ejector rod 30 pushes out bone meal in the catheter 10 outwards to press and fill the bone meal into corresponding hole positions. On one hand, the screw rod 80 is driven to move forwards through the combination of the inner gear ring 40, the planet wheel 60 and the sun wheel 70, so that a larger positive pressure can be provided, the stroke is controllable, the filling efficiency can be improved, the filling operation time is short, the bone powder filling is ensured, the operation time can be reduced, and the recovery of patients is facilitated; on the other hand, the planetary speed-increasing screw rod 80 is adopted for propulsion, the relatively small number of rotation turns of the inner gear ring 40 can realize the large stroke of the screw rod 80, the labor intensity of doctors can be greatly reduced, the filling time is greatly shortened, the operation time can be reduced, the damage to patients is reduced, and the later recovery of the patients is also facilitated.

Referring to fig. 2 and 8, fig. 8 is a schematic structural view illustrating a duct 10 and a transition handle 92 of the bone powder pusher according to an embodiment of the present invention. Further, the bone powder propeller further comprises a transition handle body 92 arranged between the catheter 10 and the cover body 20. The transition handle 92 is provided with a socket 921 and a channel 922. The insertion hole 921 is communicated with one end of the channel 922, the other end of the channel 922 is detachably sleeved on the end part of the cover body 20, and the catheter 10 is matched with the insertion hole 921 and is arranged in the insertion hole 921. Thus, when the bone meal is loaded into the catheter 10 for use, the concrete loading operation mode is as follows: the subsequent bone meal pressing step can be initiated by removing the transition handle 92 from the cage 20, loading the bone meal into the channel 922 of the transition handle 92, then initially pressing the bone meal into the catheter 10 using, for example, a bone meal filling rod 93 as shown in fig. 1, and then placing the transition handle 92 over the end of the cage 20.

Specifically, in order to facilitate loading of the powder into the duct 10, the end of the passage 922 connected to the insertion hole 921 is tapered, so that the bone powder in the passage 922 can rapidly and smoothly enter the duct 10 along the inner wall of the tapered shape, and the bone powder can remain on the inner wall of the passage 922 as little as possible. Of course, the specific shape of the channel 922 is not limited in this embodiment, and it is understood that the channel 922 may have other shapes, such as a through channel 922 or a gradually-changing diameter channel 922.

Referring to fig. 2 and 8, the catheter 10 is further fixed to the insertion hole 921 by welding. Therefore, the duct 10 is firmly combined with the transition handle body 92, and meanwhile, better sealing performance can be ensured, and the bone meal is prevented from leaking outwards. The catheter 10 may be fixedly disposed in the insertion hole 921 by other means, such as screw-fit connection, snap-fit connection, adhesion, or connection by a mounting member such as a bolt, a screw, a rivet, or a pin, which is not limited herein. In addition, the connection mode between the transition handle 92 and the cover 20 is not limited, as long as the connection mode can be easily disassembled. In this embodiment, the transition handle 92 is detachably connected to the cover 20 by a screw-fit method or a snap-fit method.

Referring to fig. 2, 9 and 10, fig. 9 illustrates a view structure diagram of the front housing 22 of the bone powder propeller according to an embodiment of the present invention, and fig. 10 illustrates an axial cross-sectional view of the front housing 22 of the bone powder propeller according to an embodiment of the present invention. Further, the end surface of the cover 20 near one end of the transition handle 92 is provided with a first end panel 21. The first end panel 21 is provided with a first through hole 211 corresponding to the lift pin 30, and the lift pin 30 is movably disposed in the first through hole 211. So, first end panel 21 plays better supporting role to ejector pin 30, and ejector pin 30 is smooth and easy along axial direction's removal effect, and in addition, first end panel 21 can guarantee the leakproofness, avoids the bone meal in the passageway 922 to enter into the cover body 20.

Furthermore, the inner wall of the first through hole 211 is provided with a first sealing ring 212, and the first sealing ring 212 is sleeved outside the push rod 30, so that the sealing performance can be ensured.

Referring to fig. 2 again, in one embodiment, the end of the rod 30 away from the screw rod 80 is provided with a guiding inclined surface. Thus, the propulsion operation can be facilitated. In addition, one end of the ejector pin 30 connected to the lead screw 80 is a spherical end, and the lead screw 80 is provided with a concave surface corresponding to the spherical end, into which the spherical end is rotatably fitted. Thus, a smaller movement margin of the screw 80 can be achieved. The push rod 30 can smoothly enter the conduit 10 and smoothly move along the conduit 10 to push the bone meal into the hole of the fracture part of the scaphoid bone of the wrist, thereby avoiding the error of processing and assembling and causing the bone meal to be incapable of being ejected out due to the fact that the push rod 30 and the conduit 10 are not coaxial.

In another embodiment, the rod 30 is welded to the screw 80, or fixed by bolts, screws, adhesives, fasteners, or the like.

Referring to fig. 2, 4 to 7, the rotation preventing member 91 further includes a collar 912 disposed on the planet carrier 50. The guide block 911 is disposed on the inner wall of the ferrule 912, and the outer wall of the ferrule 912 is further provided with a limit block 913. The planet carrier 50 is provided with a stopper groove 52 (shown in fig. 19) corresponding to the stopper 913. Stopper 913 is inserted into stopper groove 52. Thus, the planet carrier 50 is installed in the limiting groove 52 through the limiting block 913 to prevent the rotation of the rotation-preventing member 91, and the rotation-preventing member 91 is installed in the guide groove 81 through the guide block 911 to limit the rotation of the screw rod 80, so that the screw rod 80 can only move along the axial direction thereof.

It should be noted that, in infringement comparison, the "guide block 911" may be a "part of the ferrule 912", that is, the "guide block 911" and the "other part of the ferrule 912" are integrally manufactured; or a separate member which can be separated from the rest of the ferrule 912, i.e., the guide block 911 can be manufactured separately and then integrated with the rest of the ferrule 912. In one embodiment, as shown in fig. 6 or 7, the guide block 911 is a part of the ferrule 912.

Similarly, in infringement comparison, the "stopper 913" may be a "part of the ferrule 912", that is, the "stopper 913" is integrally formed with "other parts of the ferrule 912"; or a separate member that can be separated from the rest of the ferrule 912, i.e., the stop block 913 can be manufactured separately and then integrated with the rest of the ferrule 912. In one embodiment, as shown in fig. 6 or 7, the stop block 913 is a part of the ferrule 912.

Referring to fig. 6 and 7, further, there are two guide blocks 911, two guide blocks 911 are oppositely disposed on the inner wall of the ferrule 912, two guide grooves 81 are disposed, and two guide blocks 911 and two guide grooves 81 are disposed in one-to-one correspondence. Similarly, the number of the limiting blocks 913 is two, the two limiting blocks 913 are oppositely disposed on the outer wall of the ferrule 912, the number of the limiting grooves 52 is two, and the two limiting blocks 913 and the two limiting grooves 52 are disposed in a one-to-one correspondence. Of course, the number of the guide blocks 911 may be one, three or other, and is not limited herein. In addition, the number of the limiting blocks 913 may be one, three or other numbers, which is not limited herein.

Referring to fig. 1 and 2, in one embodiment, the cover 20 includes a front cover 22 and a rear cover 23. One end of the front cover 22 is connected to the catheter 10, and the inner gear ring 40 is rotatably disposed between the other end of the front cover 22 and the rear cover 23. Therefore, the inner gear ring 40 is positioned in the middle part of the cover body 20, so that the inner gear ring 40 can be conveniently operated by manual rotation to drive the inner gear ring 40 to rotate.

Referring to fig. 2, 17 to 21, fig. 17 to 19 respectively illustrate the structure diagrams of one connecting block 51 of the bone powder pusher from different viewing angles, and fig. 20 and 21 respectively illustrate the structure diagrams of the other connecting block 51 of the bone powder pusher from different viewing angles. In one embodiment, the planet carrier 50 comprises two connecting blocks 51. One of the connecting blocks 51 is fixedly connected with the front cover body 22, and the other connecting block 51 is fixedly connected with the rear cover body 23. The planet carrier 50 further includes a connecting member 53 connecting the two connecting blocks 51, and two or more positioning pins 54 connecting the two connecting blocks 51. The two or more planetary gears 60 are rotatably mounted on the two or more positioning pins 54 in a one-to-one correspondence. The number of the connecting members 53 and the positioning pins 54 is not limited. As an example, the number of the connecting members 53 is specifically three, and accordingly, the connecting block 51 is provided with connecting holes 511 corresponding to the connecting members 53. The connecting member 53 may be, for example, a screw, a bolt, a snap member, etc., and is not limited thereto. The connecting piece 53 can realize the fixed connection of the two connecting blocks 51, so that the front cover body 22 and the rear cover body 23 can be connected together.

In addition, the number of the positioning pins 54 is, for example, three, and the three planetary gears 60 are respectively rotatably mounted on the three positioning pins 54. Correspondingly, the connecting block 51 is also provided with a pin hole 512 corresponding to the positioning pin 54.

It should be noted that, in an infringement comparison, one of the connection blocks 51 is fixedly connected with one of the fixed connection parts of the front cover 22, it should be understood that the "connection block 51" may be a "part of the front cover 22", that is, the "connection block 51" is integrally formed with "the other part of the front cover 22"; or a separate member that can be separated from the other parts of the front cover 22, that is, the connecting block 51 can be manufactured separately and then combined with the other parts of the front cover 22 into a whole.

It should be noted that another connecting block 51 is fixedly connected with a fixed connection in the fixed connection of the rear cover 23, and in infringement comparison, it should be understood that the "connecting block 51" may be a part of the "rear cover 23", that is, the "connecting block 51" and the "other part of the rear cover 23" are integrally formed; or a separate member that can be separated from the other parts of the rear cover 23, that is, the connecting block 51 can be manufactured separately and then combined with the other parts of the rear cover 23 into a whole.

Referring again to fig. 2, in one embodiment, the bone meal pusher further comprises an outer bearing 94 and an inner bearing 95. The outer bearing 94 is sleeved between the planet carrier 50 and the ring gear 40, and the inner bearing 95 is sleeved between the sun gear 70 and the planet carrier 50. Therefore, on one hand, the combination of the inner gear ring 40, the planet wheel 60 and the sun wheel 70 can be compact; on the other hand, the interference of the planet carrier 50 to the rotation of the inner ring gear 40 and the interference of the planet carrier 50 to the rotation of the sun gear 70 can be avoided, the rotation effect of the inner ring gear 40 on the cover 20 is stable, and the rotation effect of the sun gear 70 relative to the screw rod 80 is stable.

Referring to fig. 2, fig. 11 and fig. 12 again, fig. 11 and fig. 12 respectively show two different view angle structural diagrams of the inner gear ring 40 of the bone powder propeller according to an embodiment of the present invention. Further, the length of the ring gear 40 in the axial direction is larger than the length of the planet gears 60 in the axial direction. The ring gear 40 includes a first middle section 41 and two first peripheral sections 42 connected to both sides of the first middle section 41. The first middle section 41 is provided with a rack 411 engaged with the planet gear 60, and the outer bearing 94 is provided between the first peripheral section 42 and the connecting block 51. One end of the first peripheral section 42 is rotatably sleeved on the front cover 22, and the other end of the first peripheral section 42 is rotatably sleeved on the rear cover 23.

In addition, referring to fig. 2 and fig. 22, fig. 22 is a schematic structural diagram of a sun gear 70 of the bone powder propeller according to an embodiment of the present invention. The length of the sun gear 70 in the axial direction is greater than the length of the planetary gears 60 in the axial direction, and the sun gear 70 includes a second middle section 72 and two second peripheral sections 73 connected to both sides of the second middle section 72. The second middle section 72 is provided with a rack 721 engaged with the planet gear 60, and the inner bearing 95 is arranged between the second peripheral section 73 and the connecting block 51.

Referring to fig. 13 to 16, fig. 13 and 14 respectively illustrate two different view structure diagrams of the positioning pin 54 of the bone powder pusher according to an embodiment of the present invention, fig. 15 illustrates one view structure diagram of the planet wheel 60 of the bone powder pusher according to an embodiment of the present invention, and fig. 16 illustrates a structure diagram of the planet wheel 60 of the bone powder pusher according to an embodiment of the present invention mounted on the positioning pin 54. In one embodiment, the locating pin 54 includes a flattened section 541. The flat section 541 is rotatably disposed in the shaft hole 61 of the planetary gear 60, and the outer wall of the flat section 541 is matched with the shaft hole 61 of the planetary gear 60 to form an oil storage space. Therefore, lubricating oil is filled in the oil storage space, so that the matching surface of the hole wall of the shaft hole 61 of the planet wheel 60 and the positioning pin 54 can be lubricated, the resistance and the heat generation are reduced, and the abrasion is reduced; and the radial floating distance of the planet wheels 60 is increased, so that the assembly error and the stress condition of the planet wheels 60 can be greatly reduced. Specifically, the positioning pin 54 may be flat as a whole, or may have a flat section 541 formed with a part thereof being flat, as long as the flat section 541 is attached to the shaft hole 61 of the planetary gear 60. In addition, the positioning pin 54 is not limited to the flat section 541, and a groove through which the lubricating oil is provided may be provided on the side wall of the positioning pin 54 at a position corresponding to the shaft hole 61 of the planetary gear 60.

Referring to fig. 1, fig. 2 and fig. 11, further, an anti-slip structure 96 is disposed on an outer wall of the housing 20. In addition, the outer wall of the ring gear is provided with an anti-slip structure 96. Therefore, the anti-skid function is better when the hand is held. Specifically, the anti-slip structure 96 is a plurality of inclined surfaces, a plurality of axial grooves, a plurality of longitudinal grooves or a plurality of anti-slip blocks disposed on the outer wall of the cover 20. Of course, the anti-slip structure 96 may also be other texture structures for anti-slip function, and is not limited herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A bone meal pusher, comprising:

the device comprises a guide pipe, a cover body and a mandril, wherein the guide pipe is connected with the cover body, and the mandril is movably arranged in the guide pipe and the cover body;

the planetary gear is meshed with the inner gear ring, the planetary gear is also meshed with the sun gear, a threaded through hole matched with the lead screw is formed in the middle of the sun gear, the lead screw is sleeved in the threaded through hole and movably arranged in the cover body, the lead screw is connected with the ejector rod, and a guide groove is formed in the side wall of the lead screw along the axial direction; the anti-rotation part is arranged on the cover body or the planet carrier, a guide block which is in guide fit with the guide groove is arranged on the anti-rotation part, and the guide block is arranged in the guide groove;

when the guide block is in work, the inner gear ring is driven to rotate, the inner gear ring drives the planet wheel to rotate, the planet wheel drives the sun wheel to rotate, the sun wheel drives the screw rod to move along the axial direction under the guide effect of the guide block, and the screw rod drives the ejector rod to move along the axial direction in the guide pipe when moving; the end, connected with the screw rod, of the ejector rod is a spherical end, the screw rod is provided with a concave surface corresponding to the spherical end, and the spherical end is rotatably arranged in the concave surface.

2. Bone meal propeller according to claim 1, characterized in that the end of the ejector pin remote from the screw rod is provided with a lead-in bevel.

3. The bone meal propeller as recited in claim 1, wherein the rotation preventing member comprises a collar disposed in the planet carrier, the inner wall of the collar is provided with the guide block, the outer wall of the collar is provided with a limit block, the planet carrier is provided with a limit groove corresponding to the limit block, and the limit block is inserted into the limit groove.

4. The bone meal propeller as recited in claim 3, wherein the number of the guide blocks is two, the two guide blocks are oppositely arranged on the inner wall of the ferrule, the number of the guide grooves is two, and the two guide blocks and the two guide grooves are arranged in one-to-one correspondence; the number of the limiting blocks is two, the two limiting blocks are oppositely arranged on the outer wall of the ferrule, the number of the limiting grooves is two, and the two limiting blocks and the two limiting grooves are arranged in a one-to-one correspondence mode.

5. Bone meal propeller according to claim 1, characterized in that the cover body comprises a front cover body and a rear cover body, one end of the front cover body is connected with the duct, and the inner gear ring is rotatably arranged between the other end of the front cover body and the rear cover body.

6. Bone meal pusher according to claim 5, characterized in that the planet carrier comprises two connection blocks, wherein one of the connection blocks is fixedly connected with the front housing and the other connection block is fixedly connected with the rear housing; the planet carrier also comprises a connecting piece for connecting the two connecting blocks and more than two positioning pins for connecting the two connecting blocks; more than two planet wheels are rotatably arranged on more than two positioning pins in a one-to-one correspondence manner.

7. The bone meal propeller of claim 6, further comprising an outer bearing and an inner bearing, wherein the outer bearing is sleeved between the planet carrier and the inner gear ring, and the inner bearing is sleeved between the sun gear and the planet carrier.

8. Bone meal pusher according to claim 7, characterized in that the length of the inner gear ring in the axial direction is greater than the length of the planet gears in the axial direction, the inner gear ring comprises a first middle section and two first peripheral sections connected to both sides of the first middle section, the first middle section is provided with a rack engaging with the planet gears, the outer bearing is provided between the first peripheral sections and the connecting block; the end part of one of the first peripheral sections is rotatably sleeved on the front cover body, and the end part of the other first peripheral section is rotatably sleeved on the rear cover body; the length of the sun wheel in the axial direction is larger than that of the planet wheel in the axial direction, the sun wheel comprises a second middle section and two second peripheral sections connected to two sides of the second middle section, the second middle section is provided with a rack meshed with the planet wheel, and the inner bearing is arranged between the second peripheral sections and the connecting blocks.

9. Bone meal propeller according to claim 6, characterized in that the locating pin comprises a flat section, the flat section is rotatably arranged in the shaft hole of the planet wheel, and the outer wall of the flat section and the shaft hole wall of the planet wheel are matched to form an oil storage space.

10. Bone meal pusher according to any of the claims 1 to 9, characterized in that the outer wall of the hood is provided with an anti-slip structure; and an anti-skidding structure is arranged on the outer wall of the inner gear ring.