CN210087848U - Shaft coupling - Google Patents

Abstract

The utility model provides a coupler, which relates to the technical field of mechanical transmission, and is characterized in that an aligning piece is arranged inside a connecting sleeve, the inner wall of a cavity of a connecting shaft is close to the aligning piece, then the cavity and the aligning piece are quickly aligned through the holding relation of the cavity and the aligning piece, and the aligning piece is arranged on the connecting sleeve, therefore, the connecting shaft and the connecting sleeve are guided to be quickly aligned and installed through the aligning piece, the conventional mode that a large amount of time is consumed to complete the mutual aligning and butt joint of two parts installed on a driving shaft and a driven shaft and then the fixing is avoided, then the connecting shaft is preliminarily and quickly aligned with the connecting sleeve under the guide of the aligning piece, the connecting sleeve and the connecting shaft are continuously close, the effect of connecting the driving shaft and the driven shaft can be realized through the quick aligning and meshing of a first gear tooth and a second gear tooth, and the efficiency of the centering of, the mounting steps are simplified.

Description

Shaft coupling

Technical Field

The utility model relates to a mechanical transmission technical field particularly, relates to a coupler.

Background

In mechanical transmission, in order to connect a driving shaft and a driven shaft together, a coupling is generally required to be arranged at the joint, so that the transmission between the driving shaft and the driven shaft can be efficiently carried out. Meanwhile, the arrangement of the coupler can effectively avoid factors unfavorable for transmission, such as axial deviation, radial deviation, angle deviation and the like, which occur in transmission.

The existing coupler is generally composed of two parts, namely one part is connected with a main transmission shaft, the other part is connected with a driven shaft, a plurality of groups of bolt holes are respectively arranged at the joint of the two parts, and the two parts are connected into a whole by the bolts which are correspondingly arranged in a penetrating way through the plurality of groups of bolt holes one to one, so that the transmission is realized.

When the existing coupler is installed at the joint through bolt connection, a plurality of groups of bolts are needed to be connected and fixed one by one, and a large amount of time is needed to be spent during centering installation, so that the efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coupler to the not enough among the above-mentioned prior art to solve the problem of long consuming time of current coupler installation centering.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

the utility model discloses an aspect provides a coupler, include: the aligning piece, the connecting shaft and the connecting sleeve; the connecting shaft and the connecting sleeve are respectively in transmission connection with an external driving shaft and an external driven shaft; the connecting sleeve comprises a sleeve with a first opening at one end, and the sleeve is sleeved on the periphery of the alignment part and is fixedly connected with one end of the alignment part; a cavity is arranged in the connecting shaft, a second opening communicated with the cavity is arranged at one end of the connecting shaft, and the other end of the alignment piece is accommodated in the cavity through the second opening; the connecting shaft is provided with first gear teeth, the connecting sleeve is provided with second gear teeth, and the first gear teeth are meshed with the second gear teeth.

Optionally, the alignment member and the sleeve are coaxially arranged, and the other end of the alignment member protrudes out of the sleeve.

Optionally, the aligning member is a cylinder, a guide surface is arranged at one end of the aligning member, which is matched with the cavity, and the guide surface is used for guiding the cavity of the connecting shaft to be close to and accommodating the aligning member.

Optionally, the first gear teeth are arranged on the outer wall of the connecting shaft, and the second gear teeth are arranged on the inner wall of the sleeve.

Further, the first gear teeth and the second gear teeth are respectively rectangular teeth.

Optionally, the coupling further comprises a first guide tooth disposed on an end surface of the sleeve having the first opening, the first guide tooth being configured to guide the first gear tooth to approach and be aligned and engaged with the second gear tooth.

Optionally, the coupling further includes a second guide tooth disposed on an end surface of the end of the connecting shaft having the second opening, and the second guide tooth is configured to guide the second gear tooth to approach the first gear tooth and to be aligned and engaged therewith.

Further, the sleeve is provided with a first guide tooth, and the first guide tooth is a triangular tooth; and/or a second guide tooth is arranged on the connecting shaft and is a triangular tooth.

Optionally, a third opening is formed in the other end of the connecting shaft and communicated with the cavity, and a spline is arranged on the inner wall of the cavity and close to the third opening and used for being matched with the driving shaft or the driven shaft.

Optionally, the connecting sleeve further comprises a base, the other end of the sleeve is fixedly arranged on the base, and the base is further provided with a mounting hole, and the mounting hole is used for being matched and fixedly installed with the driving shaft or the driven shaft through an external fixing piece.

The beneficial effects of the utility model include:

the utility model provides a coupler, include: the aligning piece, the connecting shaft and the connecting sleeve; the connecting shaft and the connecting sleeve are respectively in transmission connection with an external driving shaft and an external driven shaft; the adapter sleeve includes that one end has first open-ended sleeve, and the sleeve cover is established in counterpoint piece periphery and with the one end fixed connection of counterpoint piece to provide the effect of guide counterpoint, the convenient installation of counterpointing fast. The cavity is arranged in the connecting shaft, a second opening communicated with the cavity is formed in one end of the connecting shaft, first gear teeth are arranged on the connecting shaft, second gear teeth are arranged on the connecting sleeve, and the first gear teeth are meshed with the second gear teeth. Through the inside with counterpoint piece setting at the adapter sleeve, be close to the cavity inner wall of connecting axle along the counterpoint piece, then through the holding relation of cavity and counterpoint piece, make both counterpoint fast, again because the counterpoint piece sets up on the adapter sleeve, therefore, through the quick counterpoint installation that sets up counterpoint piece guide connecting axle and adapter sleeve, avoided the conventionality need consume a large amount of time and accomplish the mutual counterpoint butt joint of two parts on driving shaft and driven shaft then the mode of fixing again, then because the connecting axle is preliminary with the quick centering of adapter sleeve under the guide of counterpoint piece, only need continue to be close to adapter sleeve and connecting axle afterwards, can realize the effect of connecting driving shaft and driven shaft through the quick counterpoint meshing of first teeth of a cogwheel and second teeth of a cogwheel, the efficiency of shaft coupling installation centering has effectively been improved, the installation procedure has been.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a coupling according to an embodiment of the present invention;

fig. 2 is a second schematic structural view of a coupling according to an embodiment of the present invention;

fig. 3 is a third schematic structural view of a coupling according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a connecting shaft according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connecting sleeve and a positioning member provided in an embodiment of the present invention.

Icon: 100-connecting sleeves; 1001-sleeve; 1002-second gear teeth; 1003-first guide tooth; 1004 — a first opening; 1005-a base; 1006-mounting holes; 101-a connecting shaft; 1011-first gear teeth; 1012-third opening; 1013-splines; 1014-a second guide tooth; 1015-a second opening; 1016-an annular guide surface; 102-a counterpoint member; 1021-guide surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. It should be noted that, in the case of no conflict, various features in the embodiments of the present invention may be combined with each other, and the combined embodiments are still within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An aspect of the embodiment of the present invention provides a coupling, refer to fig. 1, include: the positioning piece 102, the connecting shaft 101 and the connecting sleeve 100; the connecting shaft 101 and the connecting sleeve 100 are respectively in transmission connection with an external driving shaft and an external driven shaft; the connecting sleeve 100 comprises a sleeve 1001 with a first opening 1004 at one end, the sleeve 1001 is sleeved on the periphery of the alignment part 102 and is fixedly connected with one end of the alignment part 102; a cavity is arranged in the connecting shaft 101, a second opening 1015 communicated with the cavity is arranged at one end of the connecting shaft 101, and the other end of the alignment piece 102 is accommodated in the cavity through the second opening 1015; a first gear 1011 is arranged on the connecting shaft 101, a second gear 1002 is arranged on the connecting sleeve 100, and the first gear 1011 and the second gear 1002 are meshed with each other.

Specifically, the connecting sleeve comprises a connecting sleeve 100, an aligning member 102 and a connecting shaft 101 which are sleeved together. Wherein, through set up second teeth of a cogwheel 1002 on adapter sleeve 100, set up first teeth of a cogwheel 1011 on connecting axle 101, and first teeth of a cogwheel 1011 and second teeth of a cogwheel 1002 intermeshing, thereby realize taking adapter sleeve 100 and connecting axle 101 as the part of main transmission moment of torsion through the gear of first teeth of a cogwheel 1011 and second teeth of a cogwheel 1002 meshing, still need connect adapter sleeve 100 on driving shaft or driven shaft in addition, connecting axle 101 then connects on the driven shaft or the driving shaft corresponding with it, then realize the driven effect of coupling joint. As shown in fig. 1, when the connection sleeve 100 is sleeved on the periphery of the connection shaft 101 (i.e. the inner wall of the connection sleeve 100 is provided with the second gear teeth 1002, and the outer wall of the connection shaft 101 is provided with the first gear teeth 1011), in order to solve the problem of quick alignment installation of the two, the connection sleeve 100 is provided with the alignment member 102, and one end of the alignment member 102 extends into the first opening 1004 at one end of the sleeve 1001 and is connected and fixed with the bottom of the sleeve 1001. Meanwhile, a cavity is arranged inside the connecting shaft 101, and a second opening 1015 is arranged at one end of the connecting shaft 101, the connecting shaft 101 is close to the connecting sleeve 100, so that the cavity accommodates the other end of the alignment piece 102 arranged on the connecting sleeve 100 through the second opening 1015, the connecting shaft 101 can be quickly aligned and connected with the connecting sleeve 100 through the alignment piece 102, and then the connecting shaft 101 and the connecting sleeve 100 are installed in a mutually meshed mode through the first gear teeth 1011 and the second gear teeth 1002. Therefore, the aligning and mounting steps can be simplified, the aligning and mounting time is effectively saved, the operating efficiency of the whole coupler in mounting and aligning is improved, and the time cost is reduced.

First, in the present application, the nesting relationship between the connecting shaft 101 and the connecting sleeve 100 is not specifically limited, that is, the connecting shaft 101 may be nested on the outer periphery of the connecting sleeve 100, or the connecting sleeve 100 may be nested on the outer periphery of the connecting shaft 101 (as shown in fig. 1, for convenience of description, this is taken as an example for the embodiments in the present application).

Secondly, the present application does not specifically limit the connection and fixation manner between the connection sleeve 100 and the connection shaft 101 and the driving shaft or the driven shaft, and for example, the connection and fixation may be performed by using bolts, or may be performed in various forms such as gear teeth engagement.

Thirdly, after the cavity arranged in the connecting shaft 101 accommodates the aligning member 102, the application does not limit whether a gap exists between the inner wall and the aligning member 102, for example, the gap may be absent, or a certain gap may exist between the inner wall and the aligning member 102. The better proposal is that a certain gap is arranged between the two, thereby effectively reducing the friction force.

Fourthly, in order to further improve the centering and accommodating efficiency of the connecting shaft 101 and the aligning member 102, an annular guide surface 1016 is arranged at the second opening 1015 in the extending direction of the inner wall of the chamber, so that the probability of successful alignment of the connecting shaft 101 and the aligning member 102 is effectively increased under the condition that the diameter of the second opening 1015 is increased and the diameter of the connecting shaft 101 is not increased, and the time consumed by alignment is further shortened.

Alternatively, the alignment member 102 is disposed coaxially with the sleeve 1001, and the other end of the alignment member 102 protrudes out of the sleeve 1001.

For example, as shown in fig. 2, the alignment member 102 and the sleeve 1001 are coaxially arranged, so that the connection shaft 101 and the connection sleeve 100 are installed in a centered manner when being aligned. Meanwhile, when the driving shaft transmits torque to the driven shaft, the driving shaft can rotate more stably, and adverse effects such as dislocation are avoided. Meanwhile, in order to facilitate and fast alignment, the other end (shown in fig. 2) of the alignment member 102 protrudes outside the sleeve 1001, i.e., protrudes outside the sleeve 1001.

Optionally, the alignment member 102 is a cylinder, and a guide surface 1021 is disposed at one end of the alignment member 102, where the guide surface 1021 is engaged with the cavity, and the guide surface 1021 is used for guiding the cavity of the connection shaft 101 to approach and accommodate the alignment member 102.

For example, a guide surface 1021 is arranged on an end surface of one end of the alignment member 102, which is matched with the cavity, and can generate a function of guiding alignment on the connecting shaft 101 after the second opening 1015 of the connecting shaft 101 is sleeved on the end of the alignment member 102, so that alignment between the connecting shaft 101 and the connecting sleeve 100 can be further facilitated, the success rate of alignment installation between the connecting shaft 101 and the connecting sleeve 100 is improved, and meanwhile, the time consumed by alignment installation is further reduced.

First, the present application does not limit the specific arrangement form of the guide surface 1021 provided at the end surface where the alignment member 102 engages with the chamber. For example, as shown in fig. 3, the guide surface 1021 may be a hemispherical surface smoothly connected to the outer side wall of the alignment member 102, or may be a tapered surface smoothly connected to the outer side wall of the alignment member 102, so long as it can function as a guide.

Secondly, the application does not limit whether the inside of the alignment member 102 is hollow, and preferably, the inside of the alignment member 102 may be configured to be hollow in order to reduce the weight of the coupling in the application while ensuring the strength of the alignment member.

Alternatively, the first gear teeth 1011 are disposed on the outer wall of the connecting shaft 101, and the second gear teeth 1002 are disposed on the inner wall of the sleeve 1001.

Illustratively, as shown in fig. 3, the first gear teeth 1011 are disposed on the outer wall of the connecting shaft 101, and the second gear teeth 1002 are disposed on the inner wall of the sleeve 1001, so that the connecting sleeve 100, the connecting shaft 101 and the alignment member 102 are sequentially disposed from the outside to the inside. This kind of mode of setting can be under the unchangeable circumstances of adapter sleeve 100 diameter, the diameter of further reduction connecting axle 101 to the volume of the shaft coupling in this application is further reduced.

Further, the first gear tooth 1011 and the second gear tooth 1002 are rectangular teeth, respectively.

For example, as shown in fig. 4, the first gear teeth 1011 disposed on the connecting shaft 101 are rectangular teeth, and the extending direction of the longer side of the tooth profile is the same as the axis of the connecting shaft 101, and the second gear teeth 1002 should be disposed in a manner that they are engaged with the first gear teeth 1011, so that the connecting shaft 101 and the connecting sleeve 100 are reliably connected in a transmission manner. The rectangular teeth are adopted, and the tooth form arrangement mode is shown in fig. 3, so that the strength between the gear teeth can be effectively enhanced, the gear teeth can have larger load capacity, and larger torque can be transmitted. The transmission gear is suitable for being used in the transmission of large-scale machinery.

Optionally, the coupling further comprises a first guiding tooth 1003 arranged on an end surface of the sleeve 1001 at the end having the first opening 1004, the first guiding tooth 1003 being configured to guide the first gear tooth 1011 to approach and be aligned and engaged with the second gear tooth 1002.

Specifically, when the features of the present embodiment are combined with the features of the aligning member 102 of the foregoing embodiment or the features of the aligning member 102 provided with the guide surface 1021, the process of rough alignment can be realized by the foregoing centering manner of the chamber and the aligning member 102, and the features of the present embodiment can realize precise alignment, and the specific arrangement structure is as follows: as shown in fig. 5, a first guide tooth 1003 is provided on an end surface of a sleeve 1001 having a first opening 1004, and by providing a form of the first guide tooth 1003, after the cavity of the connecting shaft 101 is initially aligned with the connecting sleeve 100 by the aligning member 102, the connecting shaft 101 continues to approach the connecting sleeve 100, after the first gear teeth 1011 contact the first guide teeth 1003 provided on the end surface of the sleeve 1001, along the guide surface of the first guide tooth 1003, into the tooth space of the second gear tooth 1002 provided on the inner wall of the sleeve 1001, so that under the condition that the connecting shaft 101 and the connecting sleeve 100 are roughly aligned firstly by applying an axial force to the connecting shaft 101, then the first gear teeth 1011 on the connecting shaft 101 and the second gear teeth 1002 on the connecting sleeve 100 are precisely aligned and meshed, thereby directly accomplish the counterpoint of shaft coupling, the process of meshing installation, great improvement use the convenience and the high efficiency nature of the shaft coupling in this application.

It should be noted that, in the present application, there is no limitation on whether the first guide tooth 1003 and the second gear tooth 1002 are connected integrally, and preferably, the first guide tooth 1003 and the second gear tooth 1002 are integrally provided, that is, the second gear tooth 1002 extends to the end surface of the sleeve 1001, and the first guide tooth 1003 is located at the end surface portion of the second gear tooth 1002, that is, as shown in fig. 5.

Optionally, the coupler further includes a second guiding tooth 1014 disposed on an end surface of the end of the connecting shaft 101 having the second opening 1015, and the second guiding tooth 1014 is configured to guide the second gear tooth 1002 to approach and be aligned and engaged with the first gear tooth 1011.

Specifically, as shown in fig. 4, in order to further improve the accuracy and efficiency of the alignment, installation and engagement between the connecting shaft 101 and the connecting sleeve 100, a second guide tooth 1014 is disposed on the end surface of the connecting shaft 101 having the second opening 1015, after the cavity of the connecting shaft 101 is initially aligned with the connecting sleeve 100 by the alignment member 102, the connecting sleeve 100 approaches in the direction of the connecting shaft 101, when the second tooth 1002 contacts the second guide tooth 1014 disposed on the end surface of the connecting shaft 101, the second tooth 1014 slides into the tooth space of the first tooth 1011 disposed on the outer wall of the connecting shaft 101 along the guide surface of the second guide tooth 1014, and when an axial force is applied to the connecting shaft 101 and the connecting sleeve 100, the second tooth 1002 on the connecting sleeve 100 is aligned with the first tooth 1011 on the connecting shaft 101, so that the alignment, the first tooth 1011 on the connecting shaft 101, and the second tooth 1011 on the connecting sleeve 100 are precisely aligned with each other, The process of meshing installation, great improvement use the convenience and the high efficiency nature of the shaft coupling in this application. When being combined with the previous embodiment, it can be realized that the first guide tooth 1003 arranged on the connecting sleeve 100 and the second guide tooth 1014 arranged on the connecting shaft 101 are guided by each other after being in close contact with each other, so that the operation of guiding the first gear teeth 1011 and the second gear teeth 1002 to be meshed in alignment is more smooth and natural.

Further, the sleeve 1001 is provided with a first guide tooth 1003, and the first guide tooth 1003 is a triangular tooth; and/or a second guide tooth 1014 is arranged on the connecting shaft 101, and the second guide tooth 1014 is a triangular tooth.

For example, as shown in fig. 5, the first guide tooth 1003 is a triangular tooth, and the second guide tooth 1014 is a triangular tooth, so that the alignment accuracy can be effectively improved, and the triangular tooth has a mature processing technology and a low processing cost. And/or in a relationship that the first guide tooth 1003 may be provided on the sleeve 1001 alone, the second guide tooth 1014 may be provided on the connecting shaft 101 alone, or both. The preferred embodiment is to have both devices set simultaneously, as shown in fig. 3.

Optionally, a third opening 1012 is provided at the other end of the connecting shaft 101, the third opening 1012 communicates with the chamber, and a spline 1013 is provided on the inner wall of the chamber near the third opening 1012, the spline 1013 being adapted to cooperate with the driving shaft or the driven shaft.

Illustratively, as shown in fig. 3, a third opening 1012 is provided at the other end of the connecting shaft 101, wherein the third opening 1012 is provided to communicate with the chamber, and a spline 1013 is provided on an inner wall of the chamber near the third opening 1012, and the spline 1013 can cooperate with the spline 1013 on the driving shaft or the driven shaft to realize driven or master-slave transmission. The form of torque transfer through splines 1013 evenly distributes the torque to each of the keys, making the load more uniform.

Optionally, the connecting sleeve 100 further includes a base 1005, the other end of the sleeve 1001 is fixedly disposed on the base 1005, the base 1005 is further provided with a mounting hole 1006, and the mounting hole 1006 is used for being matched and fixed with an external fixing member and a driving shaft or a driven shaft.

For example, as shown in fig. 5, in order to facilitate the connection sleeve 100 to be installed on the driving shaft or the driven shaft, a base 1005 is further disposed at the other end of the sleeve 1001, and an installation hole 1006 is disposed on the base 1005, so that the connection sleeve 100 and the driving shaft or the driven shaft are fixedly connected together by an external fixing member, such as a bolt, a screw, a plug, and the like. It should be noted that, this application does not do any restriction on the setting position, the setting quantity of mounting hole 1006 on base 1005, and specifically can correspond the setting with the driving shaft or the driven shaft cooperation that need the installation, for example can be as shown in fig. 5, the interval equipartition encircles and sets up three big mounting hole 1006, again the interval equipartition sets up three little mounting hole 1006 between three big mounting hole 1006.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A coupling, comprising: the aligning piece, the connecting shaft and the connecting sleeve; the connecting shaft and the connecting sleeve are respectively in transmission connection with an external driving shaft and an external driven shaft;

the connecting sleeve comprises a sleeve with a first opening at one end, the sleeve is sleeved on the periphery of the alignment piece and is fixedly connected with one end of the alignment piece; a cavity is arranged in the connecting shaft, a second opening communicated with the cavity is arranged at one end of the connecting shaft, and the other end of the alignment piece is accommodated in the cavity through the second opening; the connecting shaft is provided with first gear teeth, the connecting sleeve is provided with second gear teeth, and the first gear teeth are meshed with the second gear teeth.

2. The coupling of claim 1 wherein said alignment member is disposed coaxially with said sleeve and the other end of said alignment member projects outwardly of said sleeve.

3. The coupling of claim 1, wherein the alignment member is a cylinder, and a guide surface is provided at an end of the alignment member engaged with the cavity, the guide surface being configured to guide the cavity of the connecting shaft to approach and receive the alignment member.

4. A coupling according to claim 1, wherein said first gear teeth are provided on an outer wall of said coupling shaft and said second gear teeth are provided on an inner wall of said sleeve.

5. The coupling of claim 4 wherein said first gear teeth and said second gear teeth are each rectangular teeth.

6. The coupling of claim 1 further comprising a first guide tooth disposed on an end surface of said sleeve at an end having said first opening, said first guide tooth for guiding said first gear tooth adjacent to and in aligned engagement with said second gear tooth.

7. The coupling of claim 1 further comprising a second guide tooth disposed on an end face of said connecting shaft at an end having a second opening, said second guide tooth for guiding said second gear tooth adjacent to and in aligned engagement with said first gear tooth.

8. A coupling according to claim 6 or 7, wherein the sleeve is provided with first guide teeth, which are triangular teeth; and/or a second guide tooth is arranged on the connecting shaft and is a triangular tooth.

9. The coupling according to claim 1, wherein a third opening is provided at the other end of the connecting shaft, the third opening communicating with the chamber, and a spline for engaging with the driving shaft or the driven shaft is provided on an inner wall of the chamber near the third opening.

10. The coupling according to claim 1, wherein the connecting sleeve further comprises a base, the other end of the sleeve is fixedly arranged on the base, and the base is further provided with a mounting hole, and the mounting hole is used for being matched and fixedly arranged with the driving shaft or the driven shaft by an external fixing piece.

Images