CN214908406U - Quick accurate shaft positioning device - Google Patents

Abstract

The utility model belongs to the technical field of demountable installation positioning mechanism, in particular to quick accurate axle piece positioner, be the open-ended sleeve including axial both ends, arrange in proper order along the sleeve axial in the sleeve inner chamber and be provided with location end cap, thread bush, spring, encapsulation end cap, wherein, location end cap fixed mounting is in the sleeve, outwards stretches out on the terminal surface of orientation thread bush on the location end cap to have the lug or inwards sunken formation recess, and the thread bush can just only can follow telescopic axial and cooperate reciprocal the sliding in the sleeve.

Description

Quick accurate shaft positioning device

Technical Field

The utility model belongs to the technical field of demountable installation positioning mechanism, in particular to quick accurate axle piece positioner.

Background

The dental handpiece is a special medical apparatus for stomatology, can be used for cleaning tartar and grinding decayed teeth, and mainly adopts compressed air to drive the wind wheel to rotate at a high speed so as to drive the dental drill to rotate at a high speed, thereby carrying out cutting work. It is sometimes desirable to provide a quick mechanical positioning of the handpiece to fix the angle of the dental handpiece or the bur on the handpiece.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a quick and accurate shaft positioning device, which comprises a sleeve with two open ends in the axial direction, a positioning plug, a threaded sleeve, a spring and a packaging plug which are sequentially arranged in the inner cavity of the sleeve along the axial direction of the sleeve,

the positioning plug is an annular structure which is coaxially matched and inserted in the sleeve, a convex block is extended outwards or is sunken inwards to form a groove (the convex block and the positioning plug are integrally formed) on the end surface of the positioning plug facing the thread sleeve, the positioning plug is fixedly arranged in the sleeve,

furthermore, a convex block extends outwards or is inwards sunken to form a groove along the direction parallel to the axial direction of the positioning plug on the end surface of the positioning plug facing the thread sleeve,

the thread sleeve is an annular structure which is coaxially matched and inserted in the sleeve, the thread is arranged on the inner cavity wall of the thread sleeve, the thread sleeve is propped against the positioning plug, the thread sleeve can only slide in the sleeve in a matched and reciprocating manner along the axial direction of the sleeve,

preferably, the method comprises the following steps: a plurality of convex ridges are formed on the outer wall of the threaded sleeve along the radial direction of the threaded sleeve, the adjacent convex ridges are arranged at intervals, each convex ridge is parallel to the axial direction of the threaded sleeve in the length direction,

matched with the sliding grooves, the inner cavity wall of the sleeve is internally recessed corresponding to the convex edges one by one to form the sliding grooves, the convex edges are embedded into the corresponding sliding grooves in a matched manner and can slide in a matched manner along the length direction of the sliding grooves in a reciprocating manner,

one end of each sliding chute at least extends to the positioning plug along the length direction of the sliding chute, the other end of each sliding chute at least extends to the position close to the packaging plug,

the spring is coaxially inserted in the sleeve in a matching way and can slide in the sleeve in a matching way along the axial direction of the sleeve in a reciprocating way,

the packaging plug is an annular structure which is coaxially matched and inserted in the sleeve,

along the axial direction of the sleeve, one end of the spring is abutted against the end face of the threaded sleeve, the other end of the spring is abutted against the end face of the packaging plug, and the spring is compressed under the interaction of the threaded sleeve and the packaging plug.

Drawings

FIG. 1 is a schematic structural view of the fast and accurate positioning device for shaft members of the present invention,

FIG. 2 is a schematic structural view of the fast and accurate shaft positioning device of the present invention (the sleeve is omitted),

FIG. 3 is a schematic view of the sleeve structure of the fast and accurate positioning device for shaft members of the present invention,

FIG. 4 is a schematic structural view of a joint portion of a dental handpiece for fitting with the shaft positioning device of the present invention,

FIG. 5 is a schematic view of the structure of the dental handpiece when the dental handpiece is mounted and positioned on the shaft positioning device of the present invention (the shaft positioning device is a cross-sectional view, the dental handpiece is not shown in a cross-sectional view),

FIG. 6 is a schematic view of the structure of the dental handpiece when the dental handpiece is mounted and positioned on the shaft positioning device of the present invention (the shaft positioning device is a cross-sectional view, the dental handpiece is not shown in a cross-sectional view),

FIG. 7 is a schematic view of the structure of the dental handpiece when the dental handpiece is mounted and positioned on the shaft positioning device of the present invention (the shaft positioning device is a sectional view, the dental handpiece is not shown in the sectional view),

FIG. 8 is a schematic view of the structure of the dental handpiece when the dental handpiece is mounted and positioned on the shaft positioning device of the present invention (the shaft positioning device is a cross-sectional view, the dental handpiece is not shown in a cross-sectional view),

FIG. 9 is a schematic view of the structure of the dental handpiece when the dental handpiece is mounted and positioned on the shaft positioning device of the present invention (the shaft positioning device is a cross-sectional view, the dental handpiece is not shown in a cross-sectional view),

wherein, 1-sleeve, 11-chute, 2-positioning bulkhead, 21-projection, 22-second flange, 3-thread bushing, 31-flange, 4-spring, 5-encapsulating bulkhead, 51-third flange, 6-dental handpiece, 61-thread region, 62-caulking groove, 63-end face of dental handpiece on which caulking groove is positioned,

the direction of the arrow indicates the direction of axial rotation when the dental handpiece is screwed tightly with the threaded sleeve.

Detailed Description

As shown in the attached drawings 1 to 3, the fast and accurate shaft positioning device of the utility model comprises a cylindrical sleeve 1 with two open axial ends, a positioning plug 2, a threaded sleeve 3, a spring 4 and a packaging plug 5 which are sequentially arranged in the inner cavity of the sleeve 1 along the axial direction of the sleeve 1,

the inner cavity wall of the sleeve 1 is recessed towards the inner part of the sleeve 1 body along the radial direction of the sleeve 1 to form a plurality of sliding chutes 11, the adjacent sliding chutes 11 are arranged at intervals, each sliding chute 11 is parallel to the axial direction of the sleeve 1 in the length direction, each sliding chute 11 penetrates through the whole sleeve 1 along the length direction,

the positioning plug 2 is an annular structure which is coaxial with the sleeve 1, the positioning plug 2 is embedded in the sleeve 1 in a matching mode, the sliding grooves 11 which are in one-to-one correspondence with the outer peripheral wall of the positioning plug 2 respectively protrude outwards along the radial direction of the positioning plug 2 to form second convex ridges 22, and the second convex ridges 22 are respectively embedded in the corresponding sliding grooves 11 in a matching mode to play a limiting role, so that the positioning plug 2 cannot rotate axially relative to the sleeve 1; meanwhile, the positioning plug 2 is outwards tensioned in the sleeve 1 along the radial direction of the positioning plug 2, so that the positioning plug 2 cannot slide in the sleeve 1 along the axial direction of the sleeve 1, and thus, the positioning plug 2 is fixedly arranged in the sleeve 1 and is still,

a convex block 21 (the convex block 21 and the positioning plug 2 are integrally formed) extends outwards along the direction parallel to the axial direction of the positioning plug 2 on the end surface (the area which is not propped against and contacted with the threaded sleeve 3) of the positioning plug 2 facing the threaded sleeve 3;

the thread bush 3 is an annular structure which is coaxially arranged with the sleeve 1, the thread bush 3 is embedded in the sleeve 1 in a matching way, the thread is arranged on the inner cavity wall of the thread bush 3, one end surface of the thread bush 3 is abutted against the end surface which is close to the positioning plug 2 in parallel,

the outer peripheral wall of the threaded sleeve 3 is in one-to-one correspondence with each sliding groove 11 to form a convex edge 31 respectively along the radial direction of the threaded sleeve 3, and each convex edge 31 is respectively matched and embedded into the corresponding sliding groove 11 to play a limiting role, so that the threaded sleeve 3 cannot axially rotate relative to the sleeve 1, but the threaded sleeve 3 can be kept to be matched in the sleeve 1 and axially and reciprocally slide along the sleeve 1;

the spring 4 is coaxially inserted into the sleeve 1 in a matching manner and can slide in the sleeve 1 in a matching manner in a reciprocating manner along the axial direction of the sleeve 1, one end of the spring 4 abuts against the end face, close to the threaded sleeve 3, of the threaded sleeve 3, the other end of the spring 4 abuts against the end face, close to the encapsulation plug 5, of the encapsulation plug 5, and the spring is axially compressed under the interaction of the threaded sleeve 3 and the encapsulation plug 5;

the packaging plug 5 is an annular structure which is coaxial with the sleeve 1, the packaging plug 5 is embedded in the sleeve 1 in a matching mode, the sliding grooves 11 which are in one-to-one correspondence with the outer peripheral wall of the packaging plug 5 respectively protrude outwards along the radial direction of the packaging plug 5 to form third protruding ridges 51, and the third protruding ridges 51 are respectively embedded in the corresponding sliding grooves 11 in a matching mode to play a limiting role, so that the packaging plug 5 cannot rotate axially relative to the sleeve 1; meanwhile, the encapsulation plug 5 is tensioned in the sleeve 1 radially outwards along the self, so that the encapsulation plug 5 cannot slide in the sleeve 1 along the axial direction of the sleeve 1, and thus, the encapsulation plug 5 is fixedly installed in the sleeve 1 all the time.

The dental handpiece 6 with a cylindrical body is installed and positioned by adopting the positioning device of the utility model, a thread area 61 matched with the thread of the inner cavity of the thread sleeve 3 is arranged on the corresponding section of the outer surface of the body of the dental handpiece 6 in the circumferential direction, and an embedded groove 62 matched with the lug 21 in shape and size is arranged on the end surface (the end surface is vertical to the axial direction of the dental handpiece 6) close to the thread area 61 on the dental handpiece 6, when the dental handpiece 6 and the positioning device of the utility model are coaxially arranged, the embedded groove 62 and the lug 21 can be just projected on the same circular closed curve (the circle enclosed by the curve closure and the positioning device of the utility model are coaxially arranged), as shown in figure 4,

on the basis, the dental handpiece 6 is coaxially inserted into the sleeve 1 through the annular opening on the packaging plug 5 (the caulking groove 62 faces the end face where the lug 21 on the positioning plug 2 is located), the threaded area 61 forms a spiral fit with the inner cavity of the threaded sleeve 3 after reaching the threaded sleeve 3, on the basis, the sleeve 1 is fixed and the dental handpiece 6 is continuously screwed in a spiral fit manner towards the positioning plug 2, because the threaded sleeve 3 cannot axially rotate relative to the sleeve 1, the dental handpiece 6 (the end face where the caulking groove 62 is located on the dental handpiece 6) gradually approaches towards the lug 21 in the process of the spiral fit screwing, as shown in figure 5, until the end face where the caulking groove 62 is located abuts against the lug 21, as shown in figure 6, at the moment, the caulking groove 62 is not aligned with the lug 21, namely the lug 21 cannot be embedded into the caulking groove 62,

the previous screwing operation is continued, so that the end face of the caulking groove 62 and the projection 21 are in relative contact sliding, the caulking groove 62 is closer to the projection 21 in radial distance, meanwhile, the dental handpiece 6 cannot advance any more due to the blocking of the end face of the caulking groove 62 by the projection 21 (the positioning plug 2), so that the relative screwing movement between the dental handpiece 6 (the threaded area 61 on the dental handpiece 6) and the threaded sleeve 3 is continued, so that the threaded sleeve 3 can only move towards the direction far away from the projection 21 (which is also the reason for keeping the threaded sleeve 3 capable of fitting in the sleeve 1 and sliding back and forth along the axial direction of the sleeve 1), at the moment, the threaded sleeve 3 is separated from the positioning plug 2, and once the threaded sleeve 3 moves towards the direction far away from the projection 21 (which is called as 'reverse movement', the same applies below), a further axial compression of the spring 4 will occur, as shown in figure 7,

at the moment when the caulking groove 62 reaches and aligns with the bump 21, as shown in fig. 8, the end face where the caulking groove 62 is located loses the support of the bump 21, and under the rebound action of the spring 4, the threaded sleeve 3 and the dental handpiece 6 which are spirally matched and connected together are pushed to slide towards the direction of the bump 21 (the positioning plug 2) and the bump 21 is matched and embedded into the caulking groove 62, so that a click sound can be heard, at the moment, the dental handpiece 6 is clamped and cannot axially rotate relative to the sleeve 1, and under the elastic pressing action of the spring 4 and the blocking of the positioning plug 2, the axial sliding cannot occur relative to the sleeve 1, so that the automatic and high-precision positioning assembly of the dental handpiece 6 is realized, as shown in fig. 9.

From the utility model discloses a when dismantling dental handpiece 6 among the positioner, only need earlier draw dental handpiece 6 (with thread bush 3) to the direction of keeping away from lug 21 along the sleeve 1 axial, make caulking groove 62 break away from lug 21 (make dental handpiece 6 can rotate for sleeve 1 axial again), reverse back again with dental handpiece 6 spiral screw thread bush 3 can.

Similarly, when the caulking groove 62 of the dental handpiece 6 is changed into a convex structure, the protrusion 21 of the positioning plug 2 can be changed into a concave structure.

Claims (6)

1. The utility model provides a quick accurate axle piece positioner which characterized in that: the positioning device comprises a sleeve (1) with two open ends in the axial direction, a positioning plug (2), a threaded sleeve (3), a spring (4) and a packaging plug (5) are sequentially arranged in the inner cavity of the sleeve (1) along the axial direction of the sleeve (1),

the positioning plug (2) is of an annular structure which is coaxially inserted into the sleeve (1) in a matched manner, a convex block (21) extends outwards or is inwards recessed to form a groove on the end face of the positioning plug (2) facing the threaded sleeve (3), and the positioning plug (2) is fixedly arranged in the sleeve (1);

the threaded sleeve (3) is an annular structure coaxially inserted into the sleeve (1) in a matching manner, threads are arranged on the inner cavity wall of the threaded sleeve (3), and the threaded sleeve (3) can only slide in the sleeve (1) in a matching and reciprocating manner along the axial direction of the sleeve (1);

the spring (4) is coaxially inserted into the sleeve (1) in a matching manner and can slide in the sleeve (1) in a matching manner along the axial direction of the sleeve (1);

the packaging plug (5) is of an annular structure which is coaxially inserted into the sleeve (1) in a matched manner.

2. The fast precision shaft positioning device of claim 1, wherein: one axial end of the spring (4) abuts against the end face of the threaded sleeve (3), the other axial end of the spring abuts against the end face of the packaging plug (5), and the spring (4) is axially compressed under the interaction of the threaded sleeve (3) and the packaging plug (5).

3. The fast precision shaft positioning device of claim 2, wherein: the threaded sleeve (3) abuts against the positioning plug (2).

4. The fast precision shaft positioning device of claim 1, wherein: the end face of the positioning plug (2) facing the threaded sleeve (3) extends outwards along a direction parallel to the axial direction of the positioning plug (2) and is provided with the convex block (21) or is inwards sunken to form the groove.

5. The fast precision shaft positioning device of claim 1, wherein: a plurality of convex edges (31) are formed on the outer wall of the threaded sleeve (3) and protrude outwards along the radial direction of the threaded sleeve (3), the adjacent convex edges (31) are arranged at intervals, each convex edge (31) is parallel to the axial direction of the threaded sleeve (3) in the length direction,

matched with it be, on the inner chamber wall of sleeve (1) one-to-one correspond protruding stupefied (31) inwards cave in and form spout (11), protruding stupefied (31) cooperation is embedded into correspondingly in spout (11) and can follow spout (11) length direction cooperation is reciprocal to be slided.

6. The fast precision shaft positioning device of claim 5, wherein: one end of each sliding groove (11) at least extends to the positioning plug (2) along the length direction of the sliding groove, and the other end of each sliding groove at least extends to a position close to the packaging plug (5).

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