阅读说明：本技术 波纹管联轴器 (Corrugated pipe coupling ) 是由 李敏华 于 2021-07-08 设计创作，主要内容包括：本发明公开一种波纹管联轴器,所述波纹管联轴器包括：波纹管联轴组件,包括用以连接输入轴的第一联轴节、用以连接输出轴的第二联轴节和用于连接第一联轴节和所述第二联轴节的波纹管；防压缩件,连接所述第一联轴节与所述第二联轴节,以使所述第一联轴节与所述第二联轴节在轴向上相对固定。本发明波纹管联轴器通过将防压缩件设置在第一联轴节和第二联轴节的两端,使得第一联轴节与第二联轴节避免波纹管受轴向载荷收缩的,有利于提升使用过的稳定性。(The invention discloses a corrugated pipe coupling, which comprises: a bellows coupling assembly including a first coupling for connecting an input shaft, a second coupling for connecting an output shaft, and a bellows for connecting the first coupling and the second coupling; an anti-compression member connecting said first coupling and said second coupling so as to fix said first coupling and said second coupling relatively in an axial direction. The bellows coupling is characterized in that the first coupling and the second coupling are respectively provided with a compression-preventing piece, and the compression-preventing pieces are arranged at the two ends of the first coupling and the second coupling.)

1. A bellows coupling, comprising:

a bellows coupling assembly including a first coupling for connecting an input shaft, a second coupling for connecting an output shaft, and a bellows for connecting the first coupling and the second coupling;

an anti-compression member connecting said first coupling and said second coupling so as to fix said first coupling and said second coupling relatively in an axial direction.

2. A bellows coupling according to claim 1, wherein said anti-compression member is in the form of a strip having one end connected to said first coupling and the other end connected to said second coupling.

3. A bellows coupling according to claim 2, wherein said anti-compression member is a memory metal member.

4. A bellows coupling according to claim 2, wherein said anti-compression member is disposed within the bellows.

5. The bellows coupling of claim 4 wherein a centerline of said compression preventer coincides with an axis of rotation of said first coupling and said second coupling.

6. The bellows coupling of claim 2, wherein the bellows coupling assembly further comprises a first connector and a second connector;

the first coupling is provided with a first mounting hole at one side opposite to the end face of the second coupling, the first connecting piece is embedded in the first mounting hole, the second coupling is provided with a second mounting hole at one side opposite to the end face of the first coupling, the second connecting piece is embedded in the second mounting hole, and two ends of the compression-proof piece are respectively connected with the first connecting piece and the second connecting piece.

7. The bellows coupling of claim 6, wherein the first coupling member defines a first securing hole, the second coupling member defines a second securing hole, and wherein one end of the anti-compression member is inserted into the first securing hole and the other end is inserted into the second securing hole.

8. The bellows coupling of claim 7, wherein the first coupling member defines a first deformation slot extending radially along the first coupling member and through a perimeter wall of the first securing aperture;

the second connecting piece is provided with a second deformation groove, and the second deformation groove extends along the radial direction of the second connecting piece and penetrates through the peripheral wall of the second fixing hole.

9. The bellows coupling of claim 7 wherein the bellows coupling assembly comprises a first retaining member and a second retaining member;

the circumferential surface of the first connecting piece is provided with a first locking hole, the first locking hole extends along the radial direction of the first connecting piece and penetrates through the circumferential wall of the first fixing hole, and the first locking piece penetrates through the first locking hole to press and fix the anti-compression piece;

the peripheral surface of the second connecting piece is provided with second locking holes, the second locking holes extend along the radial direction of the second connecting piece and penetrate through the peripheral wall of the second fixing hole, and the second locking piece penetrates through the second locking holes to be pressed and fixed on the anti-compression piece.

10. A bellows coupling according to any one of claims 1 to 9, wherein said bellows coupling assembly is plural, and said plural bellows coupling assemblies are connected two by two in the axial direction;

one end of the compression preventing member is connected to the first coupling at the head end, and the other end thereof passes through the plurality of bellows coupling assemblies to be connected to the second coupling at the tail end.

Technical Field

The invention relates to the technical field of couplings, in particular to a corrugated pipe coupling.

Background

The corrugated pipe coupling is an assembly for compensating radial deviation of two non-concentric input shafts and output shafts through elastic deformation of corrugated pipes. In machining, in order to obtain higher coaxiality of the output shaft, a bellows coupling is generally adopted, and the bellows coupling is connected by using a bellows, so that when the bellows is subjected to an axial load, the bellows is easily stressed and deformed, and the bellows is compressed, thereby influencing the use.

Disclosure of Invention

The invention mainly aims to provide a corrugated pipe coupling, and aims to solve the technical problem that the corrugated pipe coupling is contracted under an axial load.

In order to achieve the above object, the present invention provides a bellows coupling comprising:

a bellows coupling assembly including a first coupling for connecting an input shaft, a second coupling for connecting an output shaft, and a bellows for connecting the first coupling and the second coupling;

an anti-compression member connecting said first coupling and said second coupling so as to fix said first coupling and said second coupling relatively in an axial direction.

Optionally, the anti-compression member is arranged in a strip shape, and one end of the anti-compression member is connected with the first coupling while the other end is connected with the second coupling.

Optionally, the anti-compression member is a memory metal member.

Optionally, the anti-compression member is disposed within the bellows.

Optionally, a centerline of said compression preventer coincides with an axis of rotation of said first coupling and said second coupling.

Optionally, the bellows coupling assembly further comprises a first connector and a second connector;

the first coupling is provided with a first mounting hole at one side opposite to the end face of the second coupling, the first connecting piece is embedded in the first mounting hole, the second coupling is provided with a second mounting hole at one side opposite to the end face of the first coupling, the second connecting piece is embedded in the second mounting hole, and two ends of the compression-proof piece are respectively connected with the first connecting piece and the second connecting piece.

Optionally, the first connecting piece is provided with a first fixing hole, the second connecting piece is provided with a second fixing hole, one end of the anti-compression piece is inserted into the first fixing hole, and the other end of the anti-compression piece is inserted into the second fixing hole.

Optionally, the first connecting piece is provided with a first deformation groove, and the first deformation groove extends along the radial direction of the first connecting piece and penetrates through the peripheral wall of the first fixing hole;

the second connecting piece is provided with a second deformation groove, and the second deformation groove extends along the radial direction of the second connecting piece and penetrates through the peripheral wall of the second fixing hole.

Optionally, the bellows coupling assembly comprises a first retaining member and a second retaining member;

the circumferential surface of the first connecting piece is provided with a first locking hole, the first locking hole extends along the radial direction of the first connecting piece and penetrates through the circumferential wall of the first fixing hole, and the first locking piece penetrates through the first locking hole to press and fix the anti-compression piece;

the peripheral surface of the second connecting piece is provided with second locking holes, the second locking holes extend along the radial direction of the second connecting piece and penetrate through the peripheral wall of the second fixing hole, and the second locking piece penetrates through the second locking holes to be pressed and fixed on the anti-compression piece.

Optionally, the number of the bellows coupling assemblies is multiple, and the bellows coupling assemblies are connected two by two along the axial direction;

one end of the compression preventing member is connected to the first coupling at the head end, and the other end thereof passes through the plurality of bellows coupling assemblies to be connected to the second coupling at the tail end.

The invention relates to a corrugated pipe coupling, wherein one end of a first coupling is connected with an input shaft, one end of a second coupling is connected with an output shaft, and a corrugated pipe is arranged between the first coupling and the second coupling. Therefore, the bellows coupling can compensate the relative displacement of the input shaft and the output shaft through the elastic deformation of the bellows, so that the coaxiality of the output shaft and the output shaft is improved. In addition, the anti-compression piece is arranged between the first coupling and the second coupling and can prevent the first coupling and the second coupling from moving relatively, so that when the first coupling and the second coupling work in special occasions, the first coupling and the second coupling can be prevented from being close to or away from each other along the axial direction, the deformation capacity of the corrugated pipe in the special occasions is guaranteed, and the stability of the output shaft and the output shaft is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

FIG. 2 is a schematic view of a cut-away structure at AA in FIG. 1;

FIG. 3 is a schematic diagram of an exploded structure of an embodiment of the bellows coupling of the present invention;

fig. 4 is a schematic view of an assembly structure of a first connecting member and an anti-compression member according to an embodiment of the bellows coupling of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						1	Corrugated pipe coupling assembly	13	Corrugated pipe	33	First locking hole
11	First shaft coupling	2	Anti-compression piece	4	Second connecting piece
						111	First mounting hole	3	First connecting piece	41	Second fixing hole
12	Second coupling	31	First fixing hole	42	Second deformation groove
						121	Second mounting hole	32	First deformation groove	43	Second locking hole

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a corrugated pipe 13 coupling.

In an embodiment of the present invention, as shown in fig. 1 to 4, the bellows 13 coupling includes:

a bellows 13 coupling assembly 1 comprising a first coupling 11 for connecting an input shaft, a second coupling 12 for connecting an output shaft, and a bellows 13 for connecting the first coupling 11 and said second coupling 12;

and a compression preventing member 2 connecting the first coupling 11 and the second coupling 12 so that the first coupling 11 and the second coupling 12 are relatively fixed in the axial direction.

In this embodiment, the cross-sectional shape of the first coupling 11 is preferably circular, which is advantageous in reducing the area occupied by the first rotary shaft when rotating. First installation position that is used for connecting the input shaft is seted up to first shaft coupling 11's one end, and first installation position can set up the pore-forming, also can set up to be the breach, does not do specific restriction here, be convenient for with the input shaft installation and fixed can. For example, when the type of the first mounting position is the first mounting hole 111, the first mounting position is disposed at the center of the first coupling 11. Thus, when the input shaft drives the first coupling 11 to rotate at a high speed, the jumping of the first coupling 11 can be reduced, and the generation of vibration can be reduced.

The cross-sectional shape of the second coupling 12 is preferably circular, and the size of the second coupling 12 corresponds to the size of the first coupling 11. Therefore, the occupied area required when the second rotating shaft rotates is reduced. The second installation position that is used for connecting the output shaft is seted up to the one end of second coupling 12, and the second installation position can set up the pore-forming, also can set up to be the breach, does not do specific restriction here, is convenient for install the output shaft and fixed connection can. For example, when the type of the second mounting location is the second mounting hole 121, the second mounting location is disposed at the center of the second coupling 12. Therefore, when the output shaft drives the second coupling 12 to rotate at a high speed, the bouncing of the second coupling 12 can be reduced, and the generation of vibration can be reduced.

The bellows 13 is sized to correspond to the size of the first coupling 11, and is preferably slightly smaller than the first coupling 11, so that the bellows 13 can be easily connected to the first coupling 11. One end of the bellows 13 is fixedly connected to the first coupling 11, and the other end is fixedly connected to the second coupling 12. In this way, the bellows 13, the first coupling 11 and the second coupling 12 form the bellows 13 coupling assembly 1, which can compensate for the radial offset of the first input shaft and the first output shaft by elastic deformation of the bellows 13.

The cross section of the anti-compression element 2 may be circular, rectangular, or irregular, and the like, and is not limited in particular, and the first coupling joint and the second coupling joint 12 may be limited to be axially close to or away from each other. For example, when the cross-section of the compression preventing member 2 is formed in a regular triangle shape, both ends of the compression preventing member 2 are connected to the first coupling joint and the second coupling joint, respectively. Therefore, the compression-preventing part 2 limits the first coupling joint and the second coupling joint 12 to be close to or far away from each other along the axial direction, so as to guarantee that the axial interval between the first coupling joint and the second coupling joint 12 is limited on special occasions, and the stability of the output shaft and the output shaft is improved.

The invention relates to a bellows 13 coupling, wherein one end of a first coupling 11 is connected with an input shaft, one end of a second coupling 12 is connected with an output shaft, and the bellows 13 is arranged between the first coupling 11 and the second coupling 12. Therefore, the corrugated pipe 13 coupling can compensate the relative displacement of the input shaft and the output shaft through the elastic deformation of the corrugated pipe 13, and the coaxiality of the output shaft and the output shaft is improved. In addition, the anti-compression piece 2 is arranged between the first coupling 11 and the second coupling 12, and the anti-compression piece 2 can prevent the first coupling 11 and the second coupling 12 from moving relatively, so that when the first coupling 11 and the second coupling 12 work in special occasions, the first coupling 11 and the second coupling 12 can be prevented from being close to or far away from each other along the axial direction, the deformation capacity of the corrugated pipe 13 in the special occasions is guaranteed, and the stability of the output shaft and the output shaft is improved.

Specifically, as shown in fig. 2 to 4, the anti-compression member 2 is arranged in a strip shape, and one end of the anti-compression member 2 is connected to the first coupling 11, and the other end is connected to the second coupling 12. The anti-compression piece 2 is a memory metal piece.

The shape of the anti-compression member 2 may be a strip or a block, and the anti-compression member is not particularly limited to this, and only needs to have a predetermined bending coefficient. For example, when the anti-compression element 2 is in a strip shape, two ends of the anti-compression element 2 are respectively connected with the first coupling 11 and the second coupling 12, and the anti-compression element 2 may be connected with the first coupling 11 and the second coupling 12 in a fixed manner or in a detachable manner, which is not limited herein, and the first coupling 11 and the second coupling 12 may be fixed relatively. When taking place elastic deformation for bellows 13, avoid being interfered by anti-compression piece 2, influence bellows 13 and take place elastic deformation, anti-compression piece 2 adopts the memory metal setting, so, anti-compression piece 2 can warp according to the deformation of bellows 13, is favorable to promoting the elastic deformation of bellows 13 to guarantee the stability of output shaft and output shaft.

Of course, it should be noted that the memory metal is nitinol. The nickel-titanium alloy has the characteristics of superelasticity, ultralow-temperature automatic recovery, wear resistance, corrosion resistance, high damping, superelasticity and the like, and the use of the nickel-titanium alloy is beneficial to prolonging the service life, improving the output precision and the like.

Further, the diameter-to-length ratio of the compression stopper 2 is 1 to 30 times or more and 1 to 50 times or less. So, when the diameter of preventing compression piece 2 is less than 1 to 30 times than the length ratio, prevent that the elastic deformation of compression piece 2 can't satisfy the designing requirement, interfere bellows 13 elastic deformation easily to influence the output precision of bellows 13 shaft coupling. When the ratio of the diameter to the length of the compression-preventing piece 2 is more than or equal to 1 to 50 times, the compression-preventing piece 2 is too soft, cannot play an effective compression-preventing function, and is not beneficial to use.

As shown in fig. 2, the compression preventing member 2 is disposed inside the bellows 13. The center line of the compression preventing member 2 coincides with the rotational axis of the first coupling 11 and the second coupling 12.

In order to better follow the bending deformation of the bellows 13 and to better prevent the first coupling 11 and the second coupling 12 from moving radially, the compression prevention element 2 is arranged in the bellows 13. Thus, the anti-compression member 2 interferes less with the bellows 13 when following the elastic deformation of the bellows 13, thereby ensuring the stability of the output shaft and the output shaft. Secondly, in order to reduce the elastic deformation of the compression preventing member 2 caused by the centrifugal force, the rotation axes of the compression preventing member 2 at the first coupling 11 and the second coupling 12 are consistent, so that when the first coupling 11 and the second coupling 12 rotate at a high speed, the elastic deformation of the compression preventing member 2 caused by the centrifugal force can be reduced, and the limitation of the mutual movement of the first coupling 11 and the second coupling 12 is further improved.

As shown in fig. 2 and 3, the bellows 13 coupling assembly 1 further includes a first connecting member 3 and a second connecting member 4; a first mounting hole 111 is formed in a side of the first coupling 11 opposite to an end surface of the second coupling 12, the first connecting member 3 is fitted in the first mounting hole 111, a second mounting hole 121 is formed in a side of the second coupling 12 opposite to the end surface of the first coupling 11, the second connecting member 4 is fitted in the second mounting hole 121, and both ends of the compression preventing member 2 are connected to the first connecting member 3 and the second connecting member 4, respectively.

The overall shape of the first connecting member 3 may be a cylindrical shape or a special shape, and is not particularly limited herein, and only needs to be capable of serving as a connecting medium. The shape of the first mounting hole 111 needs to be the same as the outer contour of the first connecting piece 3, and meanwhile, the first mounting hole 111 can be in clearance fit with the first connecting piece 3 and also can be in interference fit with the first connecting piece 3. For example, when the first mounting hole 111 is in clearance fit with the first connecting element 3, the first connecting element 3 may be fixed to the first mounting hole 111 by glue. One end of the anti-compression piece 2 is connected with one end of the first connecting piece 3, and the connecting mode can be fixedly connected or detachably connected. For example, when the compression-preventing member 2 is fixedly connected to the first connecting member 3, the compression-preventing member 2 may be welded to an end surface of the first connecting member 3. So, when the compression-preventing member 2 is installed in the first installation hole 111 through the first connecting member 3, the position of the first connecting member 3 can be adjusted, and then the first connecting member 3 is fixed, so that the assembly can be more conveniently performed during the assembly.

The overall shape of the second connecting member 4 may be cylindrical or irregular, and is not particularly limited herein, and only needs to be a connecting medium. The shape of the second mounting hole 121 needs to be the same as the outer contour of the second connecting piece 4, and meanwhile, the second mounting hole 121 can be in clearance fit with the second connecting piece 4 and also can be in interference fit with the second connecting piece 4. For example, when the second mounting hole 121 and the second connecting member 4 are in clearance fit, the second connecting member 4 can be fixed to the second mounting hole 121 by glue, and two ends of the compression-preventing member 2 are connected to one end of the second connecting member 4. The connection mode can be fixed connection or detachable connection, for example, when the connection mode of the compression-proof member 2 and the second connecting member 4 is fixed connection, the compression-proof member 2 can be welded on an end face of the second connecting member 4. So, when the compression-preventing part 2 is installed in the second installation hole 121 through the second connection part 4, the position of the second connection part 4 can be adjusted, and the position of the compression-preventing part 2 is adjusted, so that the assembly can be more conveniently carried out during the assembly.

As shown in fig. 2 and 3, the first connecting member 3 is provided with a first fixing hole 31, the second connecting member 4 is provided with a second fixing hole 41, one end of the anti-compression member 2 is inserted into the first fixing hole 31, and the other end is inserted into the second fixing hole 41. The first connecting piece 3 is provided with a first deformation groove 32, and the first deformation groove 32 extends along the radial direction of the first connecting piece 3 and penetrates through the peripheral wall of the first fixing hole 31; the second connecting member 4 is provided with a second deformation groove 42, and the second deformation groove 42 extends along the radial direction of the second connecting member 4 and penetrates through the peripheral wall of the second fixing hole 41.

The shape of first fixed orifices 31 can be for the dysmorphism also can be for circular, does not do specific restriction here, and first fixed orifices 31 can with prevent 2 interference fit of compression, also can clearance fit, does not do specific restriction here, only need can be fixed to preventing compression 2 can. For example, when the first fixing hole 31 and the compression-preventing member 2 are in interference fit, one end of the compression-preventing member 2 is disposed in the first fixing hole 31, and the compression-preventing member 2 is fixed in the first fixing hole 31. In addition, in order to facilitate the installation of the anti-compression element 2 in the first fixing hole 31, the first connection element 3 is provided with a first deformation groove 32, the first deformation groove 32 extends along the radial direction of the first connection element 3 and extends to two ends of the first connection element 3, and then the first deformation groove 32 can penetrate through the peripheral wall of one side of the first fixing hole 31 and can also penetrate through the peripheral walls of two sides of the first fixing hole 3, so that the distance between two sides of the first fixing hole 31 can be increased by expanding the first deformation groove 32 during installation, so as to facilitate the installation of the anti-compression element 2 in the first fixing hole 31.

The shape of second fixed orifices 41 can be for the dysmorphism also can be for circular, does not do specific restriction here, and second fixed orifices 41 can with prevent 2 interference fit of compression, also can clearance fit, does not do specific restriction here, only need can be fixed to preventing compression 2 can. For example, when the second fixing hole 41 and the compression-preventing member 2 are in interference fit, one end of the compression-preventing frame away from the first mounting hole 111 is disposed in the second fixing hole 41, and the compression-preventing member 2 is fixed to the second fixing hole 41. In addition, in order to facilitate the installation of the anti-compression element 2 in the second fixing hole 41, the second connecting element 4 is provided with a second deformation groove 42, the second deformation groove 42 extends along the radial direction of the second connecting element 4 and extends to two ends of the second connecting element 4, and secondly, the second deformation groove 42 can penetrate through the peripheral wall of one side of the second fixing hole 41 and can also penetrate through the peripheral walls of two sides, so that the distance between two sides of the second fixing hole 41 can be increased by expanding the second deformation groove 42 during installation, so that the anti-compression element 2 can be installed in the first fixing hole 31.

As shown in fig. 2 and 3, the bellows 13 coupling assembly 1 includes a first locking member and a second locking member; a first locking hole 33 is formed in the peripheral surface of the first connecting piece 3, the first locking hole 33 extends along the radial direction of the first connecting piece 3 and penetrates through the peripheral wall of the first fixing hole 31, and the first locking piece penetrates through the first locking hole 33 to press and fix the anti-compression piece 2; the circumferential surface of the second connecting piece 4 is provided with a second locking hole 43, the second locking hole 43 extends along the radial direction of the second connecting piece 4 and penetrates through the circumferential wall of the second fixing hole 41, and the second locking piece penetrates through the second locking hole 43 to press and fix the anti-compression piece 2.

In order to facilitate the installation and the removal, the first connecting member 3 is provided with a first locking hole 33 on the circumferential surface, and the first locking hole 33 is arranged through the circumferential wall of the first fixing hole 31. The first locking member may be a bolt, a screw, or the like, and is not particularly limited herein, and it is sufficient that the compression preventing member 2 can be fixed in the first fixing hole 31 through the first locking hole 33. For example, when the first locking member is a first screw, the inner peripheral wall of the first locking hole 33 is provided with a first thread, and the first locking member presses the anti-compression member 2 in the first locking hole 33 through the first thread connection. Thus, the anti-compression piece 2 with different specifications can be conveniently replaced according to requirements during use.

The circumferential surface of the second connecting member 4 is provided with a second locking hole 43, and the second locking hole 43 penetrates through the circumferential wall of the second fixing hole 41. The second locking member may be a bolt, a screw, or the like, and is not particularly limited herein, and the compression preventing member 2 may be fixed in the second fixing hole 41 through the second locking hole 43. For example, when the second locking member is a second screw, the inner peripheral wall of the second locking hole 43 is provided with a second thread, and the second locking member is connected through the second thread to press and fix the anti-compression member 2 in the second locking hole 43. Thus, the anti-compression piece 2 with different specifications can be conveniently replaced according to requirements during use.

In addition, a first through hole is formed in the peripheral surface of the first coupling 11, the first through hole extends along the radial direction of the first coupling 11 and penetrates through the peripheral wall of the first mounting hole 111, and the first locking piece penetrates through the first through hole to press and fix the anti-compression piece 2; second via holes are formed in the circumferential surface of the second coupling 12, the second via holes extend along the radial direction of the second coupling 12 and penetrate through the circumferential wall of the second mounting hole 121, and the second locking piece penetrates through the second via holes to press and fix the anti-compression piece 2.

In order to facilitate the assembly, the first through hole is opened on the circumferential surface of the first coupling 11, and at the same time, the first through hole and the first fixing hole 31 are concentrically arranged, the diameter of the first through hole is equivalent to that of the first locking member, and the length of the first locking member needs to be larger than the radius of the first connecting member 3, so that when the first connecting member 3 passes through the first through hole to fix the compression-preventing member 2, the first locking member has a part in the first through hole to limit the rotation and the movement of the first connecting member 3. Thus, the assembling convenience of the second connecting member 4 is improved. The second via hole is opened on the global of second coupling 12, and simultaneously, the second via hole sets up with second fixed orifices 41 is concentric, matches between second via hole diameter and the second retaining member to the length of second retaining member needs to be greater than the radius of second connecting piece 4, so, when second connecting piece 4 passed the fixed anti-compression piece 2 of second via hole, the second retaining member had the part in the second via hole, restriction second connecting piece 4 rotated and removed. Thus, the assembling convenience of the second connecting member 4 is improved.

As shown in fig. 1 to 3, there are a plurality of the corrugated pipe 13 coupling assemblies 1, and the plurality of corrugated pipe 13 coupling assemblies 1 are connected two by two in the axial direction; one end of the compression preventing member 2 is connected to the first coupling 11 at the head end, and the other end passes through a plurality of bellows 13 coupling assemblies 1 to be connected to the second coupling 12 at the tail end.

In order to improve the stability of input shaft and output shaft, the quantity of bellows 13 shaft coupling subassembly 1 can be a plurality ofly to be connected between two liang, the mode of connection can be for welding glue paste etc. do not do specific restriction here, can be with a plurality of bellows 13 shaft coupling subassemblies 1 series connection fixed can. The compression preventing member 2 has one end connected to a first coupling 11 at a head end and the other end connected to a second coupling 12 at a tail end through a coupling assembly 1 of a plurality of bellows 13. So, increased the length of bellows 13, be favorable to bellows 13 to reduce the deflection to promote elastic deformation's effect, with the stability of promotion output shaft.

In addition, the corrugated pipe 13 coupling further comprises a third connecting piece, the third connecting piece is arranged between the two adjacent corrugated pipe 13 coupling assemblies 1, and the two adjacent corrugated pipe 13 coupling assemblies 1 are connected through the third connecting piece.

In order to improve the connection stability of the coupling assemblies 1 of two adjacent corrugated pipes 13, one end of the third connecting piece is arranged at a first mounting position and a second mounting position of the coupling assemblies 1 of two adjacent corrugated pipes 13, the first mounting position is arranged to penetrate through the first coupling 11, and the second mounting position is arranged to penetrate through the second coupling. In this way, two adjacent bellows 13 coupling assemblies 1 can be connected by a third connection. In order to allow the anti-compression element 2 to pass through the coupling assembly 1 of each bellows 13, the third connecting element is provided with a through hole. In this way, the anti-compression element 2 can be connected by a through hole connecting the first coupling 11 at the head end and the second coupling 12 at the tail end. Because the quantity of the anti-compression piece 2 is only one, when the anti-compression piece 2 is arranged in the corrugated pipe 13, the anti-compression piece 2 is long, so that the anti-compression piece 2 is easy to elastically deform, the interference on the corrugated pipe 13 can be reduced when the corrugated pipe 13 elastically deforms, and the stability of the output shaft is further improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.