CN218625127U - Coupling for connecting rotating shaft and synchronizing wheel - Google Patents

Abstract

The utility model discloses a shaft coupling for connecting a rotating shaft and a synchronizing wheel, which comprises a rotating shaft linkage metal sleeve, a middle plastic sleeve and a synchronizing wheel linkage metal sleeve which are coaxially arranged and sequentially connected along the axial direction; the extrusion die also comprises an expansion extrusion block which is in a cone frustum structure; the synchronous wheel linkage metal sleeve is provided with an expansion pipe structure at one end far away from the middle plastic sleeve, the expansion pipe structure is sleeved outside the expansion extrusion block, and the expansion extrusion block can move along the axial direction of the expansion pipe structure so as to expand the outer diameter of the expansion pipe structure and tension the synchronous wheel. It not only is connected with synchronizing wheel detachably in order to keep the circulation function of using of shaft coupling, is difficult for skidding after moreover with synchronizing wheel fixed connection.

Description

Coupling for connecting rotating shaft and synchronizing wheel

Technical Field

The utility model relates to a shaft coupling technical field especially relates to a shaft coupling for connecting pivot and synchronizing wheel.

Background

The coupler mainly comprises three parts, namely a first metal shaft sleeve, a plastic sleeve and a second metal shaft sleeve which are sequentially connected along the axial direction, wherein the two metal shaft sleeves are respectively and fixedly connected with a rotating shaft of one of the two metal shaft sleeves to be linked, and the plastic sleeve is used for fixedly connecting the two metal shaft sleeves in the circumferential direction so as to enable the two metal shaft sleeves to rotate together. The reason for sleeving the plastic between the two metal shaft sleeves is as follows: since the two metal bushings cannot be perfectly coaxial, a transition connection through a plastic bushing is required in order to prevent rigid compression between the two.

However, due to the requirement of products, when the rotating shaft needs to be directly butted with the synchronizing wheel through the coupler, the coupler is required to have a function of being connected with the synchronizing wheel. However, the conventional coupling and the synchronizing wheel are liable to slip. The patent document with publication number CN204805449U discloses an integrated synchronous pulley transmission device, which solves the problem of slipping, but has high manufacturing cost, and the coupler and the synchronous pulley are inseparable, so the coupler cannot be separated from the original equipment, that is, the purpose of circulation and use by matching with other equipment cannot be realized.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a shaft coupling for connecting pivot and synchronizing wheel, it not only is connected with synchronizing wheel detachably in order to keep the circulation service function of shaft coupling, is difficult for skidding after moreover with synchronizing wheel fixed connection.

The purpose of the utility model is realized by adopting the following technical scheme:

a shaft coupling for connecting a rotating shaft and a synchronizing wheel comprises a rotating shaft linkage metal sleeve, a middle plastic sleeve and a synchronizing wheel linkage metal sleeve which are coaxially arranged and sequentially connected along the axial direction; the extrusion die also comprises an expansion extrusion block which is in a cone frustum structure; the synchronous wheel linkage metal sleeve is provided with an expansion pipe structure at one end far away from the middle plastic sleeve, the expansion pipe structure is sleeved outside the expansion extrusion block, and the expansion extrusion block can move along the axial direction of the expansion pipe structure so as to expand the outer diameter of the expansion pipe structure and tension the synchronous wheel.

Further, the expansion extrusion block is provided with an axial threaded hole, the axial threaded hole is connected with a bolt, the synchronizing wheel linkage metal sleeve is provided with a stepped through hole, the small end of the stepped through hole is closer to the expansion pipe structure than the large end of the stepped through hole, and the head of the bolt is accommodated at the large end of the stepped through hole and is abutted to the stepped surface of the stepped through hole.

Furthermore, the inner wall of the expansion pipe structure is of a conical surface structure, and the inner diameter of the expansion pipe structure gradually decreases along the direction close to the stepped through hole.

Further, the edge of the rotating shaft linkage metal sleeve protrudes along the direction close to the synchronous wheel linkage metal sleeve to form a plurality of second linkage teeth; the edge of the synchronizing wheel linkage metal sleeve protrudes along the direction close to the rotating shaft linkage metal sleeve to form a plurality of first linkage teeth; the middle plastic sleeve is provided with a plurality of plastic teeth at intervals around the middle plastic sleeve in the circumferential direction, and a containing groove is formed between every two adjacent plastic teeth; each accommodating groove accommodates one of the second linkage teeth or one of the first linkage teeth.

Furthermore, one end of the middle plastic sleeve is provided with a plurality of first limiting bulges, and the first limiting bulges are abutted with the rotating shaft linkage metal sleeve; the other end of the middle plastic sleeve is provided with a plurality of second limiting bulges, and the second limiting bulges are abutted to the synchronizing wheel linkage metal sleeve.

Furthermore, the first limiting protrusion and the second limiting protrusion are arranged on the plastic teeth.

Further, the first limiting bulges and the second limiting bulges are distributed around the plastic teeth in a staggered mode in the circumferential direction.

Furthermore, the edges of the plastic teeth are transited by a chamfer angle or a fillet.

Furthermore, the rotating shaft linkage metal sleeve is of an integrated structure, a through gap hole is formed in the rotating shaft linkage metal sleeve along the radial direction of the rotating shaft linkage metal sleeve, and the locking part of the rotating shaft linkage metal sleeve and the second linkage teeth of the rotating shaft linkage metal sleeve are positioned on two opposite sides of the through gap hole; the locking part is provided with a central hole, the locking part is provided with at least one axial fracture groove so as to enable the locking part to form an open-loop structure, the axial fracture groove of the locking part is connected with a radial screw, and the radial screw locks two opposite side walls of the axial fracture groove of the locking part together so as to enable the two opposite side walls of the axial fracture groove of the locking part to approach each other and hold an external rotating shaft tightly.

Compared with the prior art, the beneficial effects of the utility model reside in that:

based on the expansion extrusion block is a truncated cone structure, one end of the synchronizing wheel linkage metal sleeve far away from the middle plastic sleeve is an expansion pipe structure, the expansion pipe structure is sleeved outside the expansion extrusion block, and the expansion extrusion block can move along the axial direction of the expansion pipe structure so as to expand the outer diameter of the expansion pipe structure and tension the synchronizing wheel. Therefore, the synchronizing wheel is detachably connected in a tensioning manner through the expansion pipe structure of the coupler, so that the synchronizing wheel and the coupler are not easy to slip after being fixed, and can be separated to keep the circulation use function of the coupler; moreover, when the coupler is damaged, the coupler can be replaced without replacing the synchronizing wheel.

Drawings

Fig. 1 is a schematic structural diagram of a coupling for connecting a rotating shaft and a synchronizing wheel according to the present invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is another view of fig. 2.

In the figure: 1. the rotating shaft is linked with the metal sleeve; 11. a second linkage tooth; 12. a through slot hole; 13. a locking portion; 131. a central bore; 132. an axial rupture groove; 2. a middle plastic sleeve; 21. plastic teeth; 22. a containing groove; 23. a first limit protrusion; 24. a second limit bulge; 25. chamfering; 3. the synchronizing wheel is linked with the metal sleeve; 31. an expansion pipe structure; 32. a stepped through hole; 33. a first linkage tooth; 4. expanding the extrusion block; 41. an axial threaded hole; 5. a bolt; 51. a head portion; 6. a radial screw.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" 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 be present. As used herein, "vertical," "horizontal," "left," "right," and similar expressions are for purposes of illustration only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1-3 show a shaft coupling for connecting a rotating shaft and a synchronizing wheel according to a preferred embodiment of the present invention, which includes a rotating shaft linkage metal sleeve 1, a middle plastic sleeve 2, and a synchronizing wheel linkage metal sleeve 3 that are coaxially disposed and connected in sequence along an axial direction. The coupler for connecting the rotating shaft and the synchronizing wheel further comprises an expansion extrusion block 4, wherein the expansion extrusion block 4 is of a truncated cone structure; one end of the synchronizing wheel linkage metal sleeve 3, which is far away from the middle plastic sleeve 2, is an expansion pipe structure 31, the expansion pipe structure 31 is sleeved outside the expansion extrusion block 4, and the expansion extrusion block 4 can move along the axial direction of the expansion pipe structure 31, so that the outer diameter of the expansion pipe structure 31 is enlarged to expand the synchronizing wheel. Therefore, the synchronous wheels are detachably connected in a tensioning manner through the expansion pipe structure 31 of the coupler, so that the synchronous wheels are not easy to slip after being fixed, and can be separated to keep the circulation use function of the coupler; moreover, when the coupler is damaged, the coupler can be replaced without replacing the synchronizing wheel.

Preferably, the expansion extrusion block 4 is provided with an axial threaded hole 41, the axial threaded hole 41 is connected with a bolt 5, the synchronizing wheel linkage metal sleeve 3 is provided with a stepped through hole 32, the small end of the stepped through hole 32 is closer to the expansion pipe structure 31 than the large end of the stepped through hole 32, and the head 51 of the bolt 5 is accommodated at the large end of the stepped through hole 32 and abuts against the stepped surface of the stepped through hole 32. The arrangement is such that the expansion-compression block 4 is forced to move axially relative to the expansion-pipe structure 31 by the bolts 5, thereby achieving enlargement and reduction of the expansion-pipe structure 31. It will be appreciated that as an alternative arrangement, the outer curved wall of the expansion extrusion block 4 may be provided with an external thread by which to thread the expansion pipe structure 31, but this connection is obviously not smooth enough. Alternatively, the expanded extrusion 4 may be directly driven into the expanded tubular structure 31 by brute force impact.

Preferably, the inner wall of the expansion pipe structure 31 has a conical curved surface structure, and the inner diameter of the expansion pipe structure 31 becomes gradually smaller in a direction approaching the stepped through hole 32. The arrangement is such that the inner wall of the expansion pipe structure 31 is tightly connected with the expansion extrusion block 4 in a large area, thereby ensuring that the expansion pipe structure 31 is expanded in an all-round and stable manner.

Preferably, the edge of the rotating shaft linkage metal sleeve 1 protrudes in a direction close to the synchronizing wheel linkage metal sleeve 3 to form a plurality of second linkage teeth 11; the edge of the synchronizing wheel linkage metal sleeve 3 is raised along the direction close to the rotating shaft linkage metal sleeve 1 to form a plurality of first linkage teeth 33; the middle plastic sleeve 2 is provided with a plurality of plastic teeth 21 at intervals around the circumference of the middle plastic sleeve, and a containing groove 22 is formed between every two adjacent plastic teeth 21. Each receiving groove 22 receives one of the second coupling teeth 11 or one of the first coupling teeth 33. Due to the arrangement, the second linkage teeth 11 and the first linkage teeth 33 are in buffer connection through the plastic teeth 21, so that the requirement of complete coaxial arrangement between the synchronizing wheel linkage metal sleeve 3 and the rotating shaft linkage metal sleeve 1 can be greatly reduced, namely, when certain coaxiality deviation exists between the synchronizing wheel linkage metal sleeve 3 and the rotating shaft linkage metal sleeve 1, the plastic teeth 21 are used for buffering, and the first linkage teeth 33 and the second linkage teeth 11 are prevented from being rigidly extruded to be mutually damaged.

Preferably, one end of the middle plastic sleeve 2 is provided with a plurality of first limiting bulges 23, and the first limiting bulges 23 are abutted to the rotating shaft linkage metal sleeve 1. The other end of the middle plastic sleeve 2 is provided with a plurality of second limiting bulges 24, and the second limiting bulges 24 are abutted to the synchronizing wheel linkage metal sleeve 3. With this arrangement, the second linkage teeth 11 of the rotating shaft linkage metal sleeve 1 can be prevented from making rigid surface contact with the synchronizing wheel linkage metal sleeve 3, and the first linkage teeth 33 of the synchronizing wheel linkage metal sleeve 3 can be prevented from making rigid surface contact with the rotating shaft linkage metal sleeve 1, thereby avoiding the occurrence of rigid collision.

Preferably, the first limit projection 23 and the second limit projection 24 are both provided on the plastic tooth 21. By the arrangement, the structure and the shape of the rotating shaft linkage metal sleeve 1 and the synchronizing wheel linkage metal sleeve 3 can be fully considered. Preferably, the first stop projections 23 and the second stop projections 24 are distributed offset around the circumference of the ring plastic teeth 21. The arrangement is such that each plastic tooth 21 has a certain axial bending compensation margin, that is, when the first limiting bulge 23 or the second limiting bulge 24 is subjected to a large axial extrusion force, a slight deformation can be generated, so as to ensure the structural stability of the whole coupler.

Preferably, the edges of the plastic teeth 21 are rounded off by a chamfer 25 or a fillet. By means of the arrangement, the situation that the plastic teeth 21 are contacted with the first linkage teeth 33 and the situation that the plastic teeth 21 are contacted with the second linkage teeth 11 are not structurally interfered can be avoided.

Preferably, the rotating shaft linkage metal sleeve 1 is an integrated structure, the rotating shaft linkage metal sleeve 1 is provided with a through gap hole 12 along the radial direction thereof, and the locking part 13 of the rotating shaft linkage metal sleeve 1 and the second linkage teeth 11 of the rotating shaft linkage metal sleeve 1 are positioned at two opposite sides of the through gap hole 12. The locking part 13 has a central hole 131, the locking part 13 is provided with at least one axial fracture groove 132, so that the locking part 13 forms an open-loop structure, the axial fracture groove 132 of the locking part 13 is connected with a radial screw 6, and the radial screw 6 locks two opposite side walls of the axial fracture groove 132 of the locking part 13 together, so that the two opposite side walls of the axial fracture groove 132 of the locking part 13 approach each other to hold the external rotating shaft tightly. With such an arrangement, when the external rotating shaft needs to be fixed, the external rotating shaft is inserted into the central hole 131, and then the radial screw 6 is screwed to force the locking portion 13 to tightly hold the external rotating shaft. Obviously, the arrangement is such that the rotating shaft linkage metal sleeve 1 can be cast into an integrated structure to reduce the assembly relation.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (9)

1. A shaft coupling for connecting pivot and synchronizing wheel which characterized in that: comprises a rotating shaft linkage metal sleeve (1), a middle plastic sleeve (2) and a synchronizing wheel linkage metal sleeve (3) which are coaxially arranged and sequentially connected along the axial direction; the device also comprises an expansion extrusion block (4), wherein the expansion extrusion block (4) is of a truncated cone structure; one end, far away from the middle plastic sleeve (2), of the synchronizing wheel linkage metal sleeve (3) is an expansion pipe structure (31), the expansion pipe structure (31) is sleeved outside the expansion extrusion block (4), and the expansion extrusion block (4) can move along the axial direction of the expansion pipe structure (31) so that the outer diameter of the expansion pipe structure (31) is enlarged to expand the synchronizing wheel.

2. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 1, wherein: axial screw hole (41) have been seted up in inflation extrusion piece (4), axial screw hole (41) are connected with bolt (5), step through-hole (32) have been seted up in synchronizing wheel linkage metal covering (3), the tip of step through-hole (32) is than the main aspects of step through-hole (32) are more close to inflation pipe structure (31), the head (51) holding of bolt (5) is in the main aspects of step through-hole (32) and with the step face butt of step through-hole (32).

3. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 2, characterized in that: the inner wall of the expansion pipe structure (31) is of a conical surface structure, and the inner diameter of the expansion pipe structure (31) is gradually reduced along the direction close to the stepped through hole (32).

4. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 1, wherein: the edge of the rotating shaft linkage metal sleeve (1) protrudes along the direction close to the synchronous wheel linkage metal sleeve (3) to form a plurality of second linkage teeth (11); the edge of the synchronizing wheel linkage metal sleeve (3) protrudes along the direction close to the rotating shaft linkage metal sleeve (1) to form a plurality of first linkage teeth (33); the middle plastic sleeve (2) is provided with a plurality of plastic teeth (21) at intervals around the circumference of the middle plastic sleeve, and a containing groove (22) is formed between every two adjacent plastic teeth (21); each accommodating groove (22) accommodates one of the second linkage teeth (11) or one of the first linkage teeth (33).

5. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 4, characterized in that: one end of the middle plastic sleeve (2) is provided with a plurality of first limiting bulges (23), and the first limiting bulges (23) are abutted to the rotating shaft linkage metal sleeve (1); the other end of the middle plastic sleeve (2) is provided with a plurality of second limiting bulges (24), and the second limiting bulges (24) are abutted to the synchronizing wheel linkage metal sleeve (3).

6. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 5, wherein: the first limiting bulge (23) and the second limiting bulge (24) are arranged on the plastic teeth (21).

7. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 6, characterized in that: the first limiting bulges (23) and the second limiting bulges (24) are distributed around the plastic teeth (21) in a staggered mode in the circumferential direction.

8. A coupling for connecting a shaft to a synchronizing wheel according to claim 4, wherein: the edges of the plastic teeth (21) are transited by a chamfer angle (25) or a fillet.

9. A coupling for connecting a rotating shaft and a synchronizing wheel according to claim 1, wherein: the rotating shaft linkage metal sleeve (1) is of an integrated structure, a through gap hole (12) is formed in the rotating shaft linkage metal sleeve (1) along the radial direction of the rotating shaft linkage metal sleeve, and a locking part (13) of the rotating shaft linkage metal sleeve (1) and second linkage teeth (11) of the rotating shaft linkage metal sleeve (1) are located on two opposite sides of the through gap hole (12); the locking part (13) is provided with a central hole (131), at least one axial breaking groove (132) is formed in the locking part (13), so that the locking part (13) forms an open-loop structure, the axial breaking groove (132) of the locking part (13) is connected with a radial screw (6), and the radial screw (6) locks two opposite side walls of the axial breaking groove (132) of the locking part (13) together, so that two opposite side walls of the axial breaking groove (132) of the locking part (13) approach to each other to hold an external rotating shaft tightly.

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