CN211599214U

CN211599214U - Axial limiting structure of thin-wall hollow shaft and master hand tool

Info

Publication number: CN211599214U
Application number: CN202020049549.0U
Authority: CN
Inventors: 王勇
Original assignee: Chongqing Jinshan Medical Robot Co ltd
Current assignee: Chongqing Jinshan Medical Robot Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-09-29
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses an axial limiting structure of a thin-wall hollow shaft and a master tool, wherein, the axial limiting structure of the thin-wall hollow shaft comprises an electric shell, a hollow flange shaft which is in clearance fit with the electric shell is arranged in the electric shell, a first bearing is arranged on the inner side of the lower end of the electric shell, and the lower end of the flange shaft is matched and positioned with the first bearing; still include the stop collar, the interior circle of stop collar with the lower extreme excircle clearance fit of flange axle, the upper end of stop collar with the inner circle lower extreme butt of first bearing, the lower extreme of flange axle is equipped with at least one helicla flute, be equipped with on the stop collar with helicla flute complex spiral boss, spiral boss card is gone into during the helicla flute, it is spacing to the axial of flange axle to form. The utility model provides a be difficult to the problem of processing screw thread on the thin wall hollow shaft, realized that the axial of thin wall hollow shaft is spacing.

Description

Axial limiting structure of thin-wall hollow shaft and master hand tool

Technical Field

The utility model relates to a medical instrument, in particular to an axial limiting structure of a thin-wall hollow shaft and a master hand tool.

Background

For the axial limit of the shaft on the bearing inner ring or the circular hole, a shaft shoulder is generally processed at one end of the shaft, a clamping ring groove is processed at the other end of the shaft, and then the clamping ring is installed for axial limit. The method is also adopted to process threads on the shaft and carry out limit by screwing the nut, but the outer diameter and the inner diameter of the hollow shaft are limited by the specification of the threads, the reduction of the outer diameter of a master tool is not facilitated, and the method cannot be realized when the threads are also difficult to process on the thin-wall hollow shaft. For the above situation, axial position limitation of the shaft in the bearing inner ring or the hole also becomes one of the key technologies.

Therefore, those skilled in the art have been devoted to developing an axial restraining structure for a thin-walled hollow shaft.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide an axial limiting structure of a thin-walled hollow shaft.

In order to achieve the purpose, the utility model provides an axial limiting structure of a thin-wall hollow shaft, which comprises an electric shell, wherein a hollow flange shaft which is in clearance fit with the electric shell is arranged in the electric shell, a first bearing is arranged at the inner side of the lower end of the electric shell, and the lower end of the flange shaft is matched and positioned with the first bearing;

still include the stop collar, the interior circle of stop collar with the lower extreme excircle clearance fit of flange axle, the upper end of stop collar with the inner circle lower extreme butt of first bearing, the lower extreme of flange axle is equipped with at least one helicla flute, be equipped with on the stop collar with helicla flute complex spiral boss, spiral boss card is gone into during the helicla flute, it is spacing to the axial of flange axle to form.

Preferably, a first set screw is connected between the limiting sleeve and the flange shaft in a threaded manner and used for limiting the limiting sleeve in the circumferential direction.

Preferably, the lower end of the limiting sleeve is provided with a rotary fixing groove for inserting the tool.

The utility model also provides a master hand instrument, axial limit structure including foretell thin wall hollow shaft, install the motor in the utensil electricity shell, the flange axle is located between utensil electricity shell and the motor, still include big trigger and little trigger, big trigger with the motor body power of motor is connected, little trigger with the motor shaft power of motor is connected.

In order to reduce the wall thickness of the electric shell and the flange shaft, a plurality of concave parts which are arranged at intervals are arranged on the inner side surface of the lower end of the electric shell, the lower end of the flange shaft is an insertion part corresponding to the concave parts, and the arc length corresponding to the insertion part is smaller than the arc length corresponding to the concave parts.

Preferably, when the insertion part abuts against the side surface of the recessed part, the large trigger and the small trigger rotate to the maximum limit position.

In order to reduce the axial size of the master hand tool in the motor direction, further, an electric cover is mounted at the upper end of the electric cover, a top cover is arranged at the upper end of the electric cover, the inner circle of the top cover is in clearance fit with the outer circle of the electric cover, limiting convex teeth are arranged on the inner circumferential surface of the lower end of the top cover, limiting grooves corresponding to the limiting convex teeth are arranged on the electric cover, and the upper surfaces of the limiting convex teeth are attached to the upper surfaces of the limiting grooves to form axial limiting for the top cover.

Preferably, a second set screw is connected between the top cover and the bearing cover through threads and used for circumferentially limiting the bearing cover.

Preferably, the tool comprises an upper flat rod connected with the large trigger and a lower flat rod connected with the small trigger, the lower flat rod is connected with the upper flat rod through a long trigger pin, a second bearing is installed at the lower end of the long trigger pin, and a guide rail for the second bearing to slide is arranged on the tool bearing cover.

The utility model has the advantages that: the utility model discloses thin wall hollow shaft's axial limit structure sets up the stop collar through the lower extreme at the flange axle, sets up the helicla flute at the flange epaxial, sets up the spiral boss on the stop collar, utilizes spiral boss card to go into the helicla flute, and it is spacing to the axial of thin wall flange axle to form.

Drawings

Fig. 1 is a schematic structural diagram of the axial limiting structure and the master hand tool of the thin-wall hollow shaft of the present invention.

Fig. 2 is a sectional view taken along line C-C in fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a sectional view taken along line B-B in fig. 4.

Fig. 6 is a sectional view taken along line D-D in fig. 3.

Fig. 7 is a schematic view of a partial structure of the master hand tool of the present invention.

Fig. 8 is a schematic perspective view of the master hand tool of the present invention.

Fig. 9 is a bottom view of fig. 8.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-9, an axial limiting structure of a thin-walled hollow shaft comprises an electric shell 4, a hollow flange shaft 1 in clearance fit with the electric shell 4 is arranged in the electric shell 4, a first bearing 5 is arranged on the inner side of the lower end of the electric shell 4, and the lower end of the flange shaft 1 is positioned in a fit manner with the first bearing 5;

still include stop collar 12, the interior circle of stop collar 12 and the lower extreme excircle clearance fit of flange axle 1, the upper end of stop collar 12 and the inner circle lower extreme butt of first bearing 5, the lower extreme of flange axle 1 is equipped with at least one helicla flute 103, be equipped with on the stop collar 12 with helicla flute 103 complex spiral boss 1201, when helicla flute 103 was gone into to spiral boss 1201 card, it was spacing to the axial of flange axle 1 to form.

A first set screw 30 is connected between the limiting sleeve 12 and the flange shaft 1 through threads and used for limiting the limiting sleeve 12 in the circumferential direction.

The lower end of the limiting sleeve 12 is provided with a screwing groove 1202 for inserting a tool.

The axial limiting structure of the thin-wall hollow shaft is applicable to a master hand tool, a motor 2 is installed in an electric shell 4, a flange shaft 1 is positioned between the electric shell 4 and the motor 2, the axial limiting structure further comprises a large trigger 3 and a small trigger 13, the large trigger 3 is in power connection with a motor body of the motor 2, and the small trigger 13 is in power connection with a motor shaft of the motor 2.

The inner side surface of the lower end of the electric shell 4 is provided with a plurality of concave parts 401 which are arranged at intervals, the lower end of the flange shaft 1 is provided with a plug-in part 104 corresponding to the concave parts 401, and the arc length corresponding to the plug-in part 104 is smaller than that corresponding to the concave parts 401.

When the mating part 104 abuts against the side of the recess 401, the large trigger 3 and the small trigger 13 rotate to the maximum limit positions.

Utensil electricity shell 4's upper end is installed and is had and hold lid 17, and the upper end that the utensil held lid 17 is equipped with top cap 18, and the interior circle of top cap 18 and the excircle clearance fit that the utensil held lid 17 are equipped with spacing dogtooth 1801 on the inner peripheral surface of top cap 18 lower extreme, and the utensil holds and is equipped with the spacing recess 1701 that corresponds with spacing dogtooth 1801 on the lid 17, and the laminating of the upper surface of spacing dogtooth 1801 and the upper surface of spacing recess 1701 forms the axial spacing to top cap 18.

A second set screw 27 is connected between the top cover 18 and the tool bearing cover 17 through screw threads and is used for limiting the circumferential direction of the tool bearing cover 17.

The novel wrench is characterized by further comprising an upper flat rod 15 connected with the large wrench handle 3 and a lower flat rod 16 connected with the small wrench handle 13, wherein the lower flat rod 16 is connected with the upper flat rod 15 through a long wrench handle pin 20, a second bearing 21 is installed at the lower end of the long wrench handle pin 20, and a guide rail for the second bearing 21 to slide is arranged on the tool bearing cover 17.

Still including connecting at the connecting rod 6 of utensil electricity shell 4 lower extreme, articulated on the connecting rod 6 have a spanner 10, still be equipped with on the connecting rod 6 and separate and reunion button 9, trigger separation and reunion button 9 when spanner 10 rotates to extreme position.

The wrench 10 is provided with a hemispherical protrusion which is abutted against the upper surface of the clutch button 9. Since the clutch button 9 is provided with a return spring, the upper surface of the clutch button 9 can lift the wrench 10 to the initial position. When a user pulls the upper end of the wrench 10 in the direction of the axis of the motor, the wrench 10 rotates around the center of the wrench shaft 25, and the protrusion on the wrench 10 is driven to press the clutch button 9 downwards. When the upper rear end of the wrench 10 contacts with the outer circular surface of the tool case 4 (i.e. the wrench 10 rotates to the limit position), the clutch button 9 is triggered, and a clutch trigger signal is transmitted to the control center through the cable.

The excircle of the lower end of the flange shaft 1 is in clearance fit with the inner circle of the first bearing 5, the lower end of the flange shaft 1 is also provided with a third boss 102 protruding outwards along the radial direction of the flange shaft, and the lower end of the third boss 102 is abutted to the upper end of the inner circle of the first bearing 5. Be equipped with motor flange 201 on the motor 2, be equipped with on the flange axle 1 along its radial inward extension's first boss 101, first boss 101 is fixed on motor flange 201's flange face through a countersunk screw 22, is equipped with on the motor flange 201 along its axially convex second boss 2011, the interior circle of first boss 101 and the excircle butt of second boss 2011, wear to be equipped with locating pin 28 on motor flange 201 and the first boss 101 for to first boss 101 circumference location.

The main hand tool of the utility model, through hinging the spanner 10 on the connecting rod 6, utilizes the lever principle to trigger the clutch button 9 when rotating the spanner 10 to the extreme position; the top cover 18 is axially limited by matching a limiting groove 1701 arranged on the bearing cover 17 with an upper limiting convex tooth 1801 of the top cover 18; the rotation of the large trigger 3 and the small trigger 13 is limited by the matching of the plug-in part 104 of the flange shaft 1 and the concave part 401 of the electric shell 4; the flange shaft 1 is axially limited by the matching of the spiral boss 1201 on the limiting sleeve 12 and the spiral groove 103 on the flange shaft 1.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides an axial limit structure of thin wall hollow shaft, includes utensil electricity shell (4), characterized by: a hollow flange shaft (1) in clearance fit with the electric shell (4) is arranged in the electric shell (4), a first bearing (5) is arranged on the inner side of the lower end of the electric shell (4), and the lower end of the flange shaft (1) is matched and positioned with the first bearing (5);

still include stop collar (12), the interior circle of stop collar (12) with the lower extreme excircle clearance fit of flange axle (1), the upper end of stop collar (12) with the inner circle lower extreme butt of first bearing (5), the lower extreme of flange axle (1) is equipped with at least one helicla flute (103), be equipped with on stop collar (12) with helicla flute (103) complex spiral boss (1201), spiral boss (1201) card is gone into during helicla flute (103), it is spacing to the axial of flange axle (1) to form.

2. The axial limit structure of a thin-walled hollow shaft according to claim 1, wherein: and a first set screw (30) is in threaded connection between the limiting sleeve (12) and the flange shaft (1).

3. The axial limit structure of a thin-walled hollow shaft according to claim 2, wherein: the lower end of the limiting sleeve (12) is provided with a screwing groove (1202) for inserting a tool.

4. A master hand tool, characterized by: the axial limiting structure comprises the thin-wall hollow shaft according to any one of claims 1 to 3, a motor (2) is installed in the electric shell (4), the flange shaft (1) is located between the electric shell (4) and the motor (2), the axial limiting structure further comprises a large trigger (3) and a small trigger (13), the large trigger (3) is in power connection with a motor body of the motor (2), and the small trigger (13) is in power connection with a motor shaft of the motor (2).

5. The master hand tool of claim 4, wherein: the lower end of the electric shell (4) is provided with a plurality of concave parts (401) which are arranged at intervals on the inner side surface, the lower end of the flange shaft (1) is provided with an inserting part (104) corresponding to the concave parts (401), and the arc length corresponding to the inserting part (104) is smaller than that corresponding to the concave parts (401).

6. The master hand tool of claim 5, wherein: when the insertion part (104) abuts against the side surface of the concave part (401), the large trigger (3) and the small trigger (13) rotate to the maximum limit position.

7. The master hand tool of claim 4, wherein: utensil electricity shell (4)'s upper end is installed and is had a hold lid (17), the upper end that utensil held lid (17) is equipped with top cap (18), the interior circle of top cap (18) with the excircle clearance fit that utensil held lid (17), be equipped with spacing dogtooth (1801) on the inner peripheral surface of top cap (18) lower extreme, utensil hold be equipped with on lid (17) with spacing recess (1701) that spacing dogtooth (1801) correspond, the upper surface of spacing dogtooth (1801) with the upper surface laminating of spacing recess (1701), form the axial spacing to top cap (18).

8. The master hand tool of claim 7, wherein: and a second set screw (27) is in threaded connection between the top cover (18) and the bearing cover (17).

9. The master hand tool of claim 7, wherein: the novel wrench is characterized by further comprising an upper flat rod (15) connected with the large wrench handle (3) and a lower flat rod (16) connected with the small wrench handle (13), wherein the lower flat rod (16) is connected with the upper flat rod (15) through a long wrench handle pin (20), a second bearing (21) is installed at the lower end of the long wrench handle pin (20), and a guide rail for the second bearing (21) to slide is arranged on the tool bearing cover (17).