CN210389108U - Rotary fixing structure and pneumatic tool comprising same - Google Patents

Abstract

The utility model discloses a rotatory fixed knot constructs and reaches pneumatic tool including this rotatory fixed knot constructs, supplies to locate a pneumatic tool, and this pneumatic tool includes a casing and one rotationally locates the mandrel in this casing, and the outer loop week of this mandrel includes an at least limit structure, and this rotatory fixed knot constructs and includes: the limiting ring part is used for being rotatably arranged on the shell and comprises an eccentric hole and an eccentric limiting part which radially and convexly extends into the eccentric hole, the eccentric hole is used for the mandrel to penetrate through, the eccentric limiting part can be clamped with the at least one limiting structure, and the mandrel cannot rotate. The pneumatic tool comprises the rotary fixing structure, and further comprises the mandrel and the shell.

Description

Rotary fixing structure and pneumatic tool comprising same

Technical Field

The utility model relates to a rotatory fixed knot constructs and reaches pneumatic tool including this rotatory fixed knot structure.

Background

Generally, a pneumatic tool uses supplied compressed air as a power source to drive a spindle to rotate relative to a housing of the pneumatic tool, so as to drive a working portion mounted on the spindle to rotate. Typical working parts are, for example, grinding disks, sleeve heads, screwdrivers, etc.

Usually, the working part is replaced due to work requirement or loss, and the working part can be assembled on the mandrel of the pneumatic tool through a fastening structure. However, when the working portion is removed, the spindle must be fixed so as not to rotate, or the working portion cannot be removed smoothly. The conventional method for fixing the mandrel is to additionally fix the mandrel by a clamping tool or other fixed screwdriver tools, which has the disadvantages of poor fixing effect, difficult operation, and reduced efficiency of replacing the working part, thus providing a great deal of improvement.

Therefore, there is a need to provide a novel and advanced rotary fixing structure and a pneumatic tool including the same to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a rotary fixing structure and a pneumatic tool including the same, which can rapidly fix and release the rotation of the spindle.

To achieve the above object, the present invention provides a rotary fixing structure for locating a pneumatic tool, the pneumatic tool includes a housing and a spindle rotatably located in the housing, the outer ring of the spindle includes at least one position-limiting structure, and the rotary fixing structure includes: the limiting ring part is rotatably arranged on the shell and can rotate relative to the mandrel between a locking position and a releasing position, the limiting ring part comprises an eccentric hole and an eccentric limiting part which radially protrudes into the eccentric hole, the eccentric hole is used for the mandrel to penetrate through, when the limiting ring part is in the locking position, the eccentric limiting part is clamped with the at least one limiting structure, and the mandrel cannot rotate; when the limit ring part is at the release position, the eccentric limit part is not clamped with the at least one limit structure, and the mandrel can rotate freely.

Furthermore, the locking structure further comprises a locking structure, the locking structure comprises at least one first positioning part and a locking switch, the at least one first positioning part is arranged on one of the limiting ring part and the shell, the locking switch is movably arranged on the other of the limiting ring part and the shell, the locking switch comprises a second positioning part, the locking switch can move between the first position and the second position, when the locking switch is arranged at the first position, the at least one first positioning part and the second positioning part are mutually clamped and abutted, and the limiting ring part cannot rotate; when the locking switch is at the second position, the at least one first positioning part and the second positioning part are not clamped and abutted with each other, and the limiting ring part can rotate.

Furthermore, the mandrel defines an axis and a circumferential direction surrounding the axis, each of the limiting structures is a convex portion protruding outward, the convex portion includes two blocking surfaces disposed on two opposite sides, the two blocking surfaces are disposed in the circumferential direction, the eccentric limiting portion selectively abuts against one of the blocking surfaces, and the eccentric limiting portion is a radially extending projection.

Furthermore, each of the position-limiting structures and the eccentric position-limiting portion is a cone-shaped protrusion, and the two blocking surfaces are inclined surfaces.

Furthermore, the housing further includes a ring seat, the ring seat includes a receiving hole and a circumferentially extending limiting hole, the limiting ring further includes an outer ring sleeve, an inner ring member and a pin member, the inner ring member is received in the receiving hole, the inner ring member is provided with the eccentric hole and the eccentric limiting portion, the outer ring sleeve is rotatably sleeved on the ring seat, the pin member penetrates through the limiting hole, one end of the pin member is connected with the outer ring sleeve outside the ring seat, and the other end of the pin member is connected with the inner ring member inside the ring seat.

Furthermore, the periphery of the ring seat is provided with the at least one first positioning part, and the locking switch is arranged on the limit ring part.

Furthermore, one of the limit ring part and the locking switch is provided with a rail groove, and the other one is provided with a convex rail which is in linear sliding mutual embedding with the rail groove.

Furthermore, the locking structure further comprises an elastic member, the locking switch is provided with a blocking wall, and the elastic member elastically abuts between the convex rail and the blocking wall.

Furthermore, the number of the at least one limiting structure is plural, the plural limiting structures are arranged around the outer ring of the mandrel, and the eccentric limiting part can be mutually clamped with one of the limiting structures; the mandrel defines an axis and a circumferential direction surrounding the axis, each limiting structure is a convex part protruding outwards, the convex part comprises two blocking surfaces arranged at two opposite sides, the two blocking surfaces are arranged in the circumferential direction, the eccentric limiting part can be selectively clamped with one of the blocking surfaces, and the eccentric limiting part is a radially extending convex block; each limit structure and the eccentric limit part are respectively a cone-shaped protrusion, and the two blocking surfaces are respectively an inclined surface; one of the limit ring part and the locking switch is provided with a rail groove, and the other one is provided with a convex rail which is linearly and slidably embedded with the rail groove; the locking structure also comprises an elastic piece, the locking switch is provided with a blocking wall, and the elastic piece elastically props against the space between the convex rail and the blocking wall; the number of the at least one first positioning part is a plurality, and the plurality of first positioning parts are annularly arranged on the peripheral surface of the annular seat; one of the first positioning part and the second positioning part is an embedding groove, and the other one is an embedding block which can be embedded in the embedding groove; the spindle extends along an axial direction, and the locking switch moves along the axial direction; the rotary fixing structure also comprises a ring body, the ring body is provided with the convex rail, the locking switch is provided with the rail groove, the ring body is detachably arranged in the outer ring sleeve, the ring body is provided with a buckling part, and the buckling part and the outer ring sleeve are connected with each other by a fixed connecting piece; the locking switch is also provided with a containing groove communicated with the rail groove, the elastic piece is arranged in the rail groove, and one end of the elastic piece extends into the containing groove and elastically abuts against one groove wall of the containing groove.

To achieve the above object, the present invention further provides a pneumatic tool, which includes the above-mentioned rotary fixing structure, further comprising: the outer ring circumference of the mandrel comprises at least one limiting structure.

The beneficial effects of the utility model reside in that:

the utility model provides a rotary fixing structure and a pneumatic tool comprising the same, which can lead the mandrel not to rotate freely by rotating the limit ring part, thus achieving the purpose of rapidly fixing and relieving the rotation of the mandrel; the limit ring part can be combined and positioned by adjusting the locking switch, so that the limit ring part is prevented from rotating randomly.

Drawings

Fig. 1 is a perspective view of a preferred embodiment of the present invention.

Fig. 2 is an exploded view of a preferred embodiment of the present invention.

Fig. 2A is a perspective view of a locking switch according to a preferred embodiment of the present invention.

Fig. 3 is a partially exploded view of a preferred embodiment of the present invention.

Fig. 4 is a partial cross-sectional view taken along line a-a of fig. 1.

Fig. 5 is an operation diagram of a preferred embodiment of the present invention.

Fig. 6 is a partial cross-sectional view taken along line B-B of fig. 1.

Fig. 7 is a partial cross-sectional view taken along line C-C of fig. 1.

Fig. 8 is a cross-sectional view of a mandrel secured in accordance with a preferred embodiment of the present invention.

Reference numerals

1: a pneumatic tool; 2: a rotating fixed structure; 3: a housing; 4: a mandrel; 41: a limiting structure; 42: a blocking surface; 5: a fastener; 10: a limit ring part; 11: an eccentric hole; 12: an eccentric limit part; 13: an outer ring sleeve; 14: an inner ring member; 15: a pin member; 151,152: an end portion; 20: a locking structure; 21,21': a first positioning portion; 22: a locking switch; 221: a retaining wall; 222: a containing groove; 223: a trench wall; 23: a second positioning portion; 30: a ring seat; 31: a hole is formed; 32: a limiting hole; 33: a circumferential wall; 40: a raised rail; 50: a rail groove; 60: an elastic member; 70: a ring body; 71: a buckle part; 80: a fastening member; a: an axis; b: axial direction; c: and (4) circumferential direction.

Detailed Description

The following description of the present invention will be made by way of example only, and not by way of limitation, to provide the features and intended effects of the present invention.

Referring to fig. 1 to 8, which show a preferred embodiment of the present invention, the rotation fixing structure 2 of the present invention is provided for a pneumatic tool 1, the pneumatic tool 1 includes a housing 3 and a spindle 4 rotatably disposed in the housing 3, the outer ring of the spindle 4 includes at least one position-limiting structure 41, the rotation fixing structure 2 includes: a limit ring part 10 and a locking structure 20.

The limiting ring part 10 is rotatably disposed on the housing 3, the limiting ring part 10 can rotate relative to the spindle 4 between a locking position and a releasing position, the limiting ring part 10 includes an eccentric hole 11 and an eccentric limiting part 12 radially protruding into the eccentric hole 11, that is, the eccentric hole 11 and the spindle 4 are not coaxially disposed, the eccentric hole 11 is used for the spindle 4 to penetrate, when the limiting ring part 10 is in the locking position, the eccentric limiting part 12 is abutted against the at least one limiting structure 41, and the spindle 4 cannot rotate; when the position-limiting ring 10 is at the releasing position, the eccentric position-limiting part 12 does not abut against the at least one position-limiting structure 41, and the spindle 4 can rotate freely.

The locking structure 20 includes at least one first positioning portion 21 and a locking switch 22, the at least one first positioning portion 21 is disposed on one of the limiting ring portion 10 and the housing 3, the locking switch 22 is movably disposed on the other of the limiting ring portion 10 and the housing 3, the locking switch 22 includes a second positioning portion 23, the locking switch 22 can move between the first position and the second position, when the locking switch 22 is at the first position, the at least one first positioning portion 21 and the second positioning portion 23 are mutually clamped, the limiting ring portion 10 cannot rotate to position the limiting ring portion 10; when the locking switch 22 is at the second position, the at least one first positioning portion 21 and the second positioning portion 23 are not clamped against each other, and the limiting ring 10 can rotate; therefore, the eccentric limiting part 12 can be clamped against the mandrel 4 by rotating the limiting ring part 10, so that the mandrel 4 cannot rotate freely, the mandrel 4 can be quickly fixed and released from rotating, and a fastening piece 5 assembled and connected with the mandrel 4 can be conveniently disassembled; the locking switch 22 can be adjusted to position the limiting ring 10, so as to prevent the limiting ring 10 from rotating arbitrarily. The mandrel 4 defines an axis a and a circumferential direction C surrounding the axis a, each of the limiting structures 41 is a convex portion protruding outward, the convex portion includes two blocking surfaces 42 disposed on two opposite sides, the two blocking surfaces 42 are disposed on the circumferential direction C, the eccentric limiting portion 12 can selectively abut against one of the blocking surfaces 42, the eccentric limiting portion 12 is a convex block extending inward, and thus the convex block can laterally abut against the convex portion by rotating the limiting ring portion 10 forward or backward. Preferably, each of the position-limiting structure 41 and the eccentric position-limiting portion 12 is a cone, each of the two blocking surfaces 42 is an inclined surface, and the area of the eccentric position-limiting portion 12 abutting against the inclined surface is large, so as to increase the acting force for blocking the rotation of the spindle 4. In this embodiment, the number of the at least one position-limiting structure 41 is plural, the plural position-limiting structures 41 are disposed around the outer circumference of the mandrel 4, and the eccentric position-limiting portion 12 can be mutually clamped with one of the position-limiting structures 41 to fix the mandrel 4 quickly.

The housing 3 further includes a ring seat 30, and the ring seat 30 is detachably disposed on the housing 3, for example, connected to the housing 3 by a screw lock, a snap lock, or the like. The ring seat 30 includes a receiving hole 31 and a circumferentially extending limiting hole 32, and the limiting hole 32 is disposed in a circumferential wall 33 of the ring seat 30. The limiting ring 10 further includes an outer ring sleeve 13, an inner ring member 14 and a pin member 15, the inner ring member 14 is accommodated in the accommodating hole 31, the inner ring member 14 is provided with the eccentric hole 11 and the eccentric limiting portion 12, the outer ring sleeve 13 is rotatably sleeved on the ring seat 30, the pin member 15 penetrates through the limiting hole 32, the pin member 15 is movably clamped and limited on two opposite end walls of the limiting hole 32, one end 151 of the pin member 15 is connected with the outer ring sleeve 13 outside the ring seat 30, and the other end 152 is connected with the inner ring member 14 inside the ring seat 30, so that the outer ring sleeve 13 can move together with the inner ring member 14 and limit the limiting ring 10 to rotate forward and backward within the range of the limiting hole 32, thereby facilitating the processing, manufacturing, disassembly and assembly. In this embodiment, the accommodating hole 31 is eccentrically disposed, such that the eccentric hole 11 and the eccentric position-limiting portion 12 are eccentrically disposed, and the thicknesses of the wall thicknesses of the ring seat 30 are different; in other embodiments, the eccentric hole may be eccentrically disposed on the inner ring member.

In this embodiment, the ring seat 30 is provided with the at least one first positioning portion 21 at the periphery thereof, and the locking switch 22 is provided on the limiting ring 10.

Preferably, the number of the at least one first positioning portion 21 is plural, and the plural first positioning portions 21, 21' are annularly disposed on the outer peripheral surface of the annular seat 30; in the present embodiment, one of the first positioning portion 21,21 'and the second positioning portion 23 is a slot, and the other is an insert that can be inserted into the slot, in the present embodiment, each of the first positioning portion 21, 21' is a slot, and the second positioning portion 23 is an insert, so that the position-limiting ring 10 can be positioned at a plurality of rotation angles. For example, when the limiting ring 10 is at the locking position, the second positioning portion 23 can be combined and positioned at the first positioning portion 21; when the limiting ring 10 is at the releasing position, the second positioning portion 23 can be engaged and positioned at the first positioning portion 21'.

One of the limit ring part 10 and the lock switch 22 is provided with a rail groove, and the other is provided with a convex rail which is linearly slidably engaged with the rail groove, in this embodiment, the limit ring part 10 is provided with the convex rail 40, and the lock switch 22 is provided with the rail groove 50, so that the lock switch 22 can stably and linearly move relative to the limit ring part 10. Preferably, the locking structure 20 further includes an elastic member 60, the locking switch 22 is provided with a blocking wall 221, and the elastic member 60 is elastically abutted between the protruding rail 40 and the blocking wall 221 to elastically reset the locking switch 22, so as to achieve fast switching.

In this embodiment, the rotation fixing structure 2 further includes a ring body 70, the ring body 70 is provided with the protruding rail 40, the locking switch 22 is provided with the rail groove 50, the ring body 70 is detachably disposed in the outer ring 13, the ring body 70 is provided with a fastening portion 71, the fastening portion 71 and the outer ring 13 are further connected with each other by a fastening member 80, wherein the fastening portion 71 is an elastically deformable fastening arm, and thus the fastening arm is elastically deformed and fastened to the fastening member 80, so as to facilitate quick assembly and disassembly. The fixing member 80 is a pin detachably inserted into the outer ring 13.

In detail, the spindle 4 extends along an axial direction B along which the locking switch 22 is movable. The locking switch 22 is further provided with a receiving groove 222 communicated with the rail groove 50, the elastic member 60 is disposed in the rail groove 50, and one end of the elastic member extends into the receiving groove 222 and is elastically abutted against a groove wall 223 of the receiving groove 222, so that the elastic member 60 can be stably elastically compressed and reset by the locking switch 22.

The utility model discloses in addition provide a pneumatic tool 1, this pneumatic tool 1 includes like foretell rotatory fixed knot structure 2, includes in addition: the housing 3 and the spindle 4 rotatably disposed in the housing 3, an outer circumference of the spindle 4 includes the at least one position-limiting structure 41.

To sum up, the utility model discloses a rotary fixing structure and a pneumatic tool comprising the same, which can make the mandrel unable to rotate freely by rotating the limit ring part, so as to fix and release the rotation of the mandrel rapidly; the limit ring part can be combined and positioned by adjusting the locking switch, so that the limit ring part is prevented from rotating randomly.

Claims (10)

1. The utility model provides a rotatory fixed knot constructs, supplies to locate a pneumatic tool, and this pneumatic tool includes a casing and a rotationally locates the mandrel in this casing, and the outer ring of this mandrel week includes at least a limit structure, its characterized in that, this rotatory fixed knot constructs in addition and includes:

the limiting ring part is rotatably arranged on the shell and can rotate relative to the mandrel between a locking position and a releasing position, the limiting ring part comprises an eccentric hole and an eccentric limiting part which radially protrudes into the eccentric hole, the eccentric hole is used for the mandrel to penetrate through, when the limiting ring part is in the locking position, the eccentric limiting part is clamped with the at least one limiting structure, and the mandrel cannot rotate; when the limit ring part is at the release position, the eccentric limit part is not clamped with the at least one limit structure, and the mandrel can rotate freely.

2. The rotational fixing structure according to claim 1, further comprising a locking structure, wherein the locking structure comprises at least a first positioning portion and a locking switch, the at least a first positioning portion is disposed on one of the limiting ring portion and the housing, the locking switch is movably disposed on the other of the limiting ring portion and the housing, the locking switch comprises a second positioning portion, the locking switch is movable between the first position and the second position, when the locking switch is about the first position, the at least a first positioning portion and the second positioning portion are engaged with each other, and the limiting ring portion cannot rotate; when the locking switch is at the second position, the at least one first positioning part and the second positioning part are not clamped and abutted with each other, and the limiting ring part can rotate.

3. The rotating fixing structure of claim 1, wherein the mandrel defines an axis and a circumferential direction around the axis, each of the limiting structures is a protruding portion protruding outward, the protruding portion includes two blocking surfaces disposed on opposite sides, the two blocking surfaces are disposed in the circumferential direction, the eccentric limiting portion selectively abuts against one of the blocking surfaces, and the eccentric limiting portion is a radially extending protrusion.

4. The rotating fixing structure according to claim 3, wherein each of the position-limiting structure and the eccentric position-limiting portion is a cone-shaped protrusion, and the two blocking surfaces are inclined surfaces.

5. The rotational fixing structure according to claim 2, wherein the housing further comprises a ring seat, the ring seat comprises a receiving hole and a circumferentially extending limiting hole, the limiting ring further comprises an outer ring sleeve, an inner ring member and a pin member, the inner ring member is received in the receiving hole, the inner ring member is provided with the eccentric hole and the eccentric limiting portion, the outer ring sleeve is rotatably sleeved on the ring seat, the pin member is inserted through the limiting hole, one end of the pin member is connected with the outer ring sleeve outside the ring seat, and the other end of the pin member is connected with the inner ring member inside the ring seat.

6. The structure of claim 5, wherein the ring seat has at least one first positioning portion disposed on an outer periphery thereof, and the locking switch is disposed on the limiting ring portion.

7. The rotary fixing structure according to claim 2, wherein one of the limit ring portion and the locking switch is provided with a rail groove, and the other is provided with a convex rail linearly slidably fitted with the rail groove.

8. The structure of claim 7, wherein the locking structure further comprises a resilient member, the locking switch has a wall, and the resilient member is resiliently urged between the rail and the wall.

9. The rotating fixture structure of claim 6, wherein the at least one position-limiting structure is plural in number, the plural position-limiting structures are disposed around the outer circumference of the mandrel, and the eccentric position-limiting portion can be engaged with one of the position-limiting structures; the mandrel defines an axis and a circumferential direction surrounding the axis, each limiting structure is a convex part protruding outwards, the convex part comprises two blocking surfaces arranged at two opposite sides, the two blocking surfaces are arranged in the circumferential direction, the eccentric limiting part can be selectively clamped with one of the blocking surfaces, and the eccentric limiting part is a radially extending convex block; each limit structure and the eccentric limit part are respectively a cone-shaped protrusion, and the two blocking surfaces are respectively an inclined surface; one of the limit ring part and the locking switch is provided with a rail groove, and the other one is provided with a convex rail which is linearly and slidably embedded with the rail groove; the locking structure also comprises an elastic piece, the locking switch is provided with a blocking wall, and the elastic piece elastically props against the space between the convex rail and the blocking wall; the number of the at least one first positioning part is a plurality, and the plurality of first positioning parts are annularly arranged on the peripheral surface of the annular seat; one of the first positioning part and the second positioning part is an embedding groove, and the other one is an embedding block which can be embedded in the embedding groove; the spindle extends along an axial direction, and the locking switch moves along the axial direction; the rotary fixing structure also comprises a ring body, the ring body is provided with the convex rail, the locking switch is provided with the rail groove, the ring body is detachably arranged in the outer ring sleeve, the ring body is provided with a buckling part, and the buckling part and the outer ring sleeve are connected with each other by a fixed connecting piece; the locking switch is also provided with a containing groove communicated with the rail groove, the elastic piece is arranged in the rail groove, and one end of the elastic piece extends into the containing groove and elastically abuts against one groove wall of the containing groove.

10. A pneumatic tool comprising a rotary fixture structure according to any one of claims 1 to 9, further comprising: the outer ring circumference of the mandrel comprises at least one limiting structure.

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