CN112842452A

CN112842452A - Miniature skull mill

Info

Publication number: CN112842452A
Application number: CN202110138338.3A
Authority: CN
Inventors: 田先亮; 张晗; 刘猛
Original assignee: Suzhou Yinuosi Medical Science & Technology Co ltd; Guangdong Industry Technical College
Current assignee: Suzhou Yinuosi Medical Science & Technology Co ltd; Guangdong Industry Technical College
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-05-28
Anticipated expiration: 2041-02-01
Also published as: CN112842452B

Abstract

The invention discloses a miniature skull mill, which comprises: the rotating shaft (10), a bearing assembly (11) arranged on the rotating shaft (10) and a bearing assembly (11) are fixed on the rotating shaft (10), a limiting assembly (12) arranged on the rotating shaft (10) contains the bearing assembly (10) and a shell assembly (2) of the limiting assembly (12) and cutters (3) and connecting shafts (16) arranged at two ends of the rotating shaft (10) respectively, the connecting shafts (16) are arranged in the shell assembly (2), and the cutters (3) extend out of the shell assembly (2). According to the invention, the bearing assemblies are all limited on the same rotating shaft through the limiting assembly, so that the coaxiality of the miniature skull milling machine is improved, the problems of serious bearing abrasion and rapid temperature rise are solved, and the service life of the bearing is prolonged.

Description

Miniature skull mill

Technical Field

The invention relates to the field of medical equipment, in particular to a miniature skull mill.

Background

In the craniotomy, a miniature skull mill is frequently used for performing an operation, the miniature skull mill is an operation tool for cutting off the skull by installing cutters with different lengths by providing power through a special mobile phone, and the miniature skull mill is used by a doctor due to the characteristics of small volume and high rotating speed so that the operation can be performed conveniently and quickly.

The existing miniature skull mill connects a front end bearing with a stop block part and a shell as required, a rear end bearing is directly installed in the shell part, and a motor is connected with the shell through a tail sleeve part. Therefore, the coaxiality of the miniature skull milling machine in the operation process is difficult to guarantee, the temperature at the bearing position rises quickly, the product abrasion is aggravated, the service life of the bearing is shortened, and the like.

Disclosure of Invention

The invention aims to provide a miniature skull milling machine with high coaxiality, aiming at the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a micro craniotome comprising: the rotating shaft, the bearing assembly sleeved on the rotating shaft, the limiting assembly fixed on the rotating shaft, the shell assembly containing the bearing assembly and the limiting assembly, and the cutter and the connecting shaft which are fixed at two ends of the rotating shaft respectively are arranged in the shell assembly, and the cutter extends out of the shell assembly.

Further, the bearing assembly comprises a first bearing, a second bearing, a third bearing and a fourth bearing, wherein the first bearing, the second bearing, the third bearing and the fourth bearing are sequentially sleeved on the rotating shaft, the connecting shaft connecting end is arranged on the rotating shaft, and the cutter connecting end is sequentially sleeved on the rotating shaft.

Furthermore, the rotating shaft is provided with a convex ring in a radial protruding mode, and the first bearing inner ring is in axial butt joint with the convex ring.

Furthermore, spacing subassembly is including spacing retaining ring and the solid fixed ring of first bearing, first bearing sets up the retaining ring with gu fixed ring between.

Furthermore, the limiting assembly further comprises a fixing sleeve fixed on the rotating shaft, the fixing sleeve is fixed on the rotating shaft through a clamp spring, and the fixing ring is fixed on the fixing ring and the convex ring.

Furthermore, the limiting assembly further comprises a steel ball limiting ring and a blocking ring, wherein the steel ball limiting ring and the blocking ring are used for limiting the third bearing and the fourth bearing, the third bearing and the fourth bearing are arranged between the steel ball limiting ring and the blocking ring, the steel ball limiting ring is arranged between the second bearing and the third bearing, and a gasket is further arranged between the third bearing and the fourth bearing.

Further, the limiting assembly further comprises a first spring, and the first spring is arranged between the fixing ring and the second bearing.

Furthermore, the miniature skull mill further comprises a connecting sleeve ring and a second spring, the connecting sleeve ring is sleeved on the connecting shaft, and the second spring is arranged between the connecting sleeve ring and the retainer ring.

Furthermore, shell subassembly includes the shell, overlaps and establish switch and the cover of screwing on the shell, with shell threaded connection's thread bush and setting are in the terminal tail cover of shell.

Further, the shell subassembly still includes the cover and establishes first telescope tube and second telescope tube on the thread bush and with the fender bracket that the thread bush is connected.

Compared with the prior art, the invention has the advantages that: the bearing assembly is completely limited on the same rotating shaft through the limiting assembly, so that the coaxiality of the miniature skull milling machine is improved, the problems of serious bearing abrasion and rapid temperature rise are solved, and the service life of the bearing is prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the miniature skull mill of the present invention.

Fig. 2 is a schematic structural diagram of a spindle component of the miniature skull milling machine.

Fig. 3 is an exploded view of the spindle assembly of the miniature skull mill of the present invention.

Fig. 4 is a schematic structural view of a housing assembly of the micro craniotome of the invention.

FIG. 5 is an exploded view of the housing assembly of the micro craniotome of the invention.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length h", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. 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. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, the micro skull milling device according to an embodiment of the present invention includes a cutter 3, a spindle unit 1 connected to the cutter 3, and a housing assembly 2 accommodating the spindle unit 1, where the spindle unit 1 includes a rotating shaft 10, a bearing assembly 11 sleeved on the rotating shaft 10, and a limiting assembly 12 limiting the bearing assembly 11 on the rotating shaft 10. The bearing assemblies 11 are all limited on the same rotating shaft 10 through the limiting assemblies 12, coaxiality of the miniature skull milling is improved, and therefore the problems of serious bearing abrasion, fast temperature rise and short service life are solved.

As shown in fig. 2 to 5, the bearing assembly 11 includes a first bearing 111, and the first bearing 111 is disposed at the rear end of the rotating shaft 10. The shaft 10 has a protruding ring 102 protruding radially, and the inner ring of the first bearing 111 abuts against the protruding ring 102 of the shaft 10. The position limiting assembly 12 includes a retainer ring 120 and a fixing ring 121 disposed at both sides of the first bearing 111, and the first bearing 111 is fixed on the rotating shaft 10 by the retainer ring 120 and the fixing ring 121. The fixing ring 121 is sleeved on the convex ring 102 and the fixing sleeve 122, the fixing sleeve 122 is fixed on the rotating shaft 10 through the snap spring 13, one end of the fixing sleeve 122 is abutted with the convex ring 102, the other end of the fixing sleeve 122 is fixed on the rotating shaft 10 in a limiting manner through a roller pin 15 penetrating through the first through hole 101 of the rotating shaft 10, and balls 14 are further fixed at two ends of the roller pin 15. A third spring 126 is further disposed in the fixing sleeve 122, and the third spring 126 is sleeved on the rotating shaft 10.

The bearing assembly 11 further includes a third bearing 113 and a fourth bearing 114, and the third bearing 113 and the fourth bearing 114 are disposed at the front end of the rotating shaft 10. The spacing assembly 12 further comprises a steel ball spacing ring 123 and a blocking ring 124 for fixing the third bearing 113 and the fourth bearing 114 on the rotating shaft 10, the third bearing 113 and the fourth bearing 114 are arranged between the steel ball spacing ring 123 and the blocking ring 124, and a gasket 116 is arranged between the third bearing 113 and the fourth bearing 114 to reduce friction between the bearings. A second bearing 112 and a first spring 125 are further arranged between the steel ball limiting ring 123 and the fixing ring 121, and the first spring 125 is arranged between the fixing ring 121 and the second bearing 112.

The cutter 3 is disposed at the foremost end of the rotary shaft 10 and extends out of the housing assembly 2. A connecting shaft 16 is further connected to the end of the rotating shaft 10, and the connecting shaft 16 is disposed in the housing assembly 2. The connecting shaft 16 and the rotating shaft 10 are correspondingly provided with pin holes 100, the connecting shaft 16 is fixed on the rotating shaft 10 through a cylindrical pin 19, and the connecting shaft 16 is connected with a mobile phone so as to provide power for the miniature skull milling. A coupling collar 17 is further fitted over the coupling shaft 16, and a second spring 18 is further disposed between the coupling collar 17 and the retainer ring 120.

The housing assembly 2 comprises a housing 20, a screwing switch 23 and a screwing sleeve 24 which are sleeved on the housing 20, a thread sleeve 21 which is in threaded connection with the housing 20, a tail sleeve 22 which is arranged at the tail end of the housing 20, a first telescopic sleeve 25 and a second telescopic sleeve 26 which are sleeved on the thread sleeve 21, and a protection frame 27 which is connected with the thread sleeve 21, wherein the screwing switch 23 is arranged at the rear end of the housing 20, and the screwing sleeve 24 is arranged at the rear end of the housing 20. The housing 20 is provided with a second through hole, a fifth spring 30 is arranged in the second through hole, the fifth spring 30 is connected with a button 31, and the fifth spring 30 and the button 31 are both arranged in the screwing switch 23. A seal frame 29 is disposed in the threaded sleeve 21, and a fourth spring 28 is further provided between the first telescopic sleeve 25 and the second telescopic sleeve 26.

The assembly process of the invention is as follows:

firstly, the first spring 125 is sleeved on the rotating shaft 10, the fixing sleeve 122 is sleeved on the third spring 126, the fixing sleeve 122 is fixed on the rotating shaft 10 by the snap spring 13, the roller pin 15 with the two ends connected with the ball 14 is arranged in the first through hole 101, the first bearing is sleeved on the rotating shaft 10 and is fixed by the retainer ring 120. The connecting sleeve ring 17 is sleeved on the connecting shaft 16, the second spring 18 is sleeved on the rotating shaft 10, and the connecting shaft 16 is fixed at the tail end of the rotating shaft 10 by the cylindrical pin 19. The fixing ring 121, the first spring 125, the second bearing 112, the steel ball limiting ring 123, the third bearing 113, the gasket 116, the fourth bearing 114 and the blocking ring 124 are sequentially sleeved on the rotating shaft 10. The housing 20 is fitted over the assembled shaft 10, the fifth spring 30 and the button 31 are fitted into the second through hole, the tightening switch 23 is fitted, and the tail sleeve 22 is fixed to the end of the housing 20. The steel ball is arranged on the steel ball limiting ring 123, and then the tightening sleeve 24 is sleeved on the shell 20 and is tightened. The first telescopic sleeve 25, the fourth spring 28 and the second telescopic sleeve 26 are sequentially sleeved on the threaded sleeve 21, the protection frame 27 is fixed at the front end of the threaded sleeve 21, the steel wire retainer ring 120 and the sealing framework 29 are arranged in the threaded sleeve 21, the threaded sleeve 21 is sleeved on the rotating shaft 10, the threaded sleeve 21 and the shell 20 are screwed tightly, and finally the cutter 3 is fixed on the rotating shaft 10.

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 present 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.

Claims

1. A micro craniotome, comprising: the rotating shaft (10), a bearing assembly (11) arranged on the rotating shaft (10) and a bearing assembly (11) are fixed on the rotating shaft (10), a limiting assembly (12) arranged on the rotating shaft (10) contains the bearing assembly (10) and a shell assembly (2) of the limiting assembly (12) and cutters (3) and connecting shafts (16) arranged at two ends of the rotating shaft (10) respectively, the connecting shafts (16) are arranged in the shell assembly (2), and the cutters (3) extend out of the shell assembly (2).

2. The micro skull mill according to claim 1, wherein the bearing assembly (11) comprises a first bearing (111), a second bearing (112), a third bearing (113) and a fourth bearing (114), and the first bearing (111), the second bearing (112), the third bearing (113) and the fourth bearing (114) are sequentially sleeved on the rotating shaft (10) from the connecting end of the rotating shaft (10) and the connecting shaft (16) to the connecting end of the rotating shaft (10) and the cutter (3).

3. The micro skull mill according to claim 2, characterized in that the shaft (10) is radially raised with a convex ring (102), and the inner ring of the first bearing (111) is in axial abutment with the convex ring (102).

4. The micro craniotome according to claim 3, wherein the stop assembly (12) comprises a stop ring (120) and a fixing ring (121) for stopping the first bearing (111), the first bearing (111) being arranged between the stop ring (120) and the fixing ring (121).

5. The micro skull mill according to claim 4, characterized in that the stop assembly (12) further comprises a fixing sleeve (122) fixed on the rotating shaft (10), the fixing sleeve (122) is fixed on the rotating shaft (10) through a clamp spring (13), and the fixing ring (121) is fixed on the fixing ring (122) and the convex ring (102).

6. The micro skull mill according to claim 2, wherein the limiting assembly (12) further comprises a steel ball limiting ring (123) and a blocking ring (124) for limiting the third bearing (113) and the fourth bearing (114), the third bearing (113) and the fourth bearing (114) are arranged between the steel ball limiting ring (123) and the blocking ring (124), the steel ball limiting ring (123) is arranged between the second bearing (112) and the third bearing (113), and a gasket (116) is further arranged between the third bearing (113) and the fourth bearing (114).

7. The micro craniotome according to claim 2, wherein the stop assembly (12) further comprises a first spring (125), the first spring (125) being arranged between the fixation ring (121) and the second bearing (112).

8. The micro craniotome according to claim 4, further comprising a connecting collar (17) and a second spring (18), wherein the connecting collar (17) is sleeved on the connecting shaft (16), and the second spring (18) is arranged between the connecting collar (17) and the retainer ring (120).

9. The micro skull mill according to claim 1, characterized in that the housing assembly (2) comprises a housing (20), a screwing switch (23) and a screwing sleeve (24) fitted over the housing (20), a threaded sleeve (21) screwed to the housing (20), and a tail sleeve (22) provided at the end of the housing (20).

10. The micro craniotome according to claim 1, wherein the housing assembly (2) further comprises a first (25) and a second (26) telescopic sleeve fitted over the threaded sleeve (21) and a protection bracket (27) connected to the threaded sleeve (21).