CN113894749A

CN113894749A - Shaft piece, shaft piece assembly fixture and shaft system

Info

Publication number: CN113894749A
Application number: CN202111260114.6A
Authority: CN
Inventors: 王小刚; 李泉; 胡沙
Original assignee: Guangzhou Wenchong Shipyard Co Ltd
Current assignee: Guangzhou Wenchong Shipyard Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-07
Anticipated expiration: 2041-10-28
Also published as: CN113894749B

Abstract

The invention belongs to the technical field of shafting assembly, and discloses a shaft piece which is made of an elastic material and comprises a clamping part and an assembly part. The assembling part is used for being installed in a through hole of the matching part, the shaft element is provided with a blind hole along the axial direction, and the blind hole sequentially penetrates through the clamping part and the assembling part; the shaft element has an initial state and a deformation state, and when the shaft element is in the initial state, the outer diameter of the assembling portion is D1, the length of the assembling portion is L1, and the assembling portion is used for being in interference fit with the through hole to complete assembling. When the shaft element is in a deformation state, the outer diameter of the assembling part is D2, the length of the assembling part is L2, and the shaft element is in clearance fit with the through hole and is convenient to mount in the through hole or dismount from the through hole. Wherein D1 is more than D2, and L1 is less than L2.

Description

Shaft piece, shaft piece assembly fixture and shaft system

Technical Field

The invention relates to the technical field of shafting assembly, in particular to a shaft, a shaft assembly tool and a shafting.

Background

The ship shafting, especially the ship stern shaft and the intermediate shaft are generally connected by flanges and are connected by bolts, and the shaft bodies of the bolts and the flange holes generally need interference installation.

The bolt mounting methods commonly used at present have two types: one is a refrigerated installation and the other is a hydraulically driven installation. The processing diameter of the bolt is slightly greater than the diameter of the flange hole during freezing installation, and the bolt needs to be cooled in advance during installation, so that the bolt shrinks, the diameter of the rod body correspondingly diminishes, then the bolt is installed in the flange hole and then the normal temperature is recovered, so that the bolt is heated and expanded to the normal size, and interference fit is formed between the bolt and the flange hole. The method is easy to operate, and is mostly adopted for installation at present, but the method has the problems that the bolt is not easy to take out after installation, and the bolt or a flange hole is easy to be damaged due to burr processing when the bolt is directly pulled out. When the hydraulic drive installation is adopted, the hydraulic bolt is adopted, namely, an oil groove is formed in the bolt and the taper sleeve is arranged, the hydraulic bolt is pulled by hydraulic pressure during the installation, so that the bolt and the taper sleeve are in interference fit in the flange hole, the clearance is eliminated, the structure of the hydraulic bolt is complex, the taper sleeve and the oil groove in the bolt are difficult to machine, and the cost is high.

Therefore, a shaft assembly tool and a shaft system are needed to solve the above problems.

Disclosure of Invention

According to one aspect of the present invention, there is provided a shaft member having an initial state and a deformed state for assembling and disassembling the shaft member without damaging the shaft member and the through hole.

In order to achieve the purpose, the invention adopts the following technical scheme:

an axle member made of an elastic material, comprising:

a clamping portion;

the assembling part is used for being installed in a through hole of a matching part, the shaft element is provided with a blind hole along the axial direction, and the blind hole sequentially penetrates through the clamping part and the assembling part; the shaft element has an initial state and a deformed state, and when the shaft element is in the initial state, the outer diameter of the assembling part is D1, the length of the assembling part is L1, and the assembling part is used for being in interference fit with the through hole; when the shaft piece is in a deformed state, the outer diameter of the assembling part is D2, the length of the assembling part is L2, the shaft piece is used for being in clearance fit with the through hole, wherein D1 is larger than D2, and L1 is smaller than L2.

The shaft piece preferably further comprises a limiting part and a connecting part, the assembling part is located between the limiting part and the connecting part, the outer diameter of the limiting part is larger than D1, the connecting part is used for connecting a connecting piece, and the outer diameter of the connecting piece is larger than D1.

In a preferred aspect of the shaft member, the connecting member is a nut, the connecting portion has an external thread, and the nut is screwed to the connecting portion.

According to another aspect of the present invention, there is provided an axle assembly fixture, including the axle, further including:

the top supporting rod is inserted into the blind hole and is tightly abutted against the bottom wall of the blind hole, and the shaft part is in a deformation state; when the top supporting rod is separated from the bottom wall of the blind hole, the shaft part is in an initial state;

the driving piece is used for driving the top supporting rod to be tightly abutted against the bottom wall of the blind hole;

and the clamping piece is used for clamping the clamping part.

Preferably, the clamping portion is located at an end of the shaft, and the clamping member is fixed to the driving member.

As a preferred scheme of the shaft assembly tool, the clamping part is in threaded connection with the clamping piece.

Preferably, in the shaft assembly fixture, the hardness of the top stay is greater than the hardness of the shaft.

As a preferable scheme of the shaft fitting tool, the blind hole is cylindrical, and an axis of the blind hole coincides with an axis of the shaft.

As a preferred scheme of the shaft assembly tool, the top stay bar is cylindrical and has a diameter smaller than the inner diameter of the blind hole.

According to another aspect of the present invention, a shaft system is provided, which includes the shaft member, and further includes a fitting member, the fitting member includes a first shaft and a second shaft, a first flange is fixedly disposed at one end of the first shaft, a second flange is fixedly disposed at one end of the second shaft, a through hole is disposed on the fitting member, the through hole includes a first through hole disposed in the first flange and a second through hole disposed in the second flange, a portion of the fitting portion is disposed through the first through hole in an interference manner, and another portion of the fitting portion is disposed through the second through hole in an interference manner.

The invention has the beneficial effects that:

the shaft part is made of elastic materials and has an initial state and a deformation state, when the shaft part is in the initial state, the shaft part is in interference fit with the through hole, the shaft part is firmly connected with the through hole, and when the shaft part is in the deformation state, the shaft part is in clearance fit with the through hole, so that the shaft part is conveniently detached from the through hole. The blind hole is formed in the shaft, the top support rod is inserted into the blind hole, the driving piece drives the top support rod to be tightly abutted to the bottom wall of the blind hole, the state of the shaft can be changed, the shaft is deformed from an initial state to a deformation state, the shaft and the through hole form clearance fit, the shaft is conveniently installed in the through hole, and after the shaft is installed, the top support rod is separated from the bottom wall of the blind hole, so that the shaft is restored to the initial state, and the shaft and the through hole form interference fit. Change the shaft member to deformation state again, can easily dismantle the shaft member from the through-hole in, can not damage shaft member and through-hole, and the cost is lower.

Drawings

FIG. 1 is a half sectional view of a shaft member in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a shaft fitting tool in the embodiment of the invention;

FIG. 3 is a schematic structural diagram of a shafting in an embodiment of the present invention;

FIG. 4 is a schematic structural view of a shafting excluding a shaft and nut portion according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a shaft assembly tool and a shaft system in an embodiment of the invention.

In the figure:

11. a clamping portion; 12. an assembling portion; 13. a limiting part; 14. a connecting portion; 15. blind holes;

2. a top brace rod;

3. a drive member; 31. a driving member body; 32. a telescopic rod; 33. an oil pump; 341. an oil inlet pipe; 342. an oil outlet pipe;

4. a clamping member;

100. a mating member; 101. a first shaft; 102. a second shaft; 103. a first flange plate; 104. a second flange plate; 105. a through hole; 1051. a first through hole; 1052. a second through hole; 106. and a nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In traditional interference fit connection, the installation of bolt usually adopts frozen method, and the cooling makes the bolt shrink in advance promptly, and the diameter of pole body diminishes to install on the hole, nevertheless can lead to the bolt difficult taking out after the installation, damage bolt or flange hole because of processing the burr easily if directly pull out the bolt. Or, hydraulic drive installation is adopted, a hydraulic bolt is used, namely an oil groove is formed in the bolt, a taper sleeve is arranged on the bolt, the hydraulic bolt is pulled by hydraulic pressure during installation, the bolt and the taper sleeve are in interference fit in a flange hole, and a gap is eliminated.

Fig. 1 shows a half-sectional view of a shaft member in an embodiment of the present invention. Referring to fig. 1, in view of the above problems, the present embodiment provides a shaft member having different states to be engaged with the through hole 105 of the engaging member 100 in the shaft hole, which can be used in the field of shaft assembly technology.

With continued reference to fig. 1, the shaft member is made of an elastic material, can be elongated in the axial direction, and can be restored to an original state after being elongated. Specifically, the shaft member includes a fitting portion 12, the fitting portion 12 is configured to be fitted in a through hole 105 of the fitting member 100 to form a fitting, the shaft member has an initial state and a deformed state, when the shaft member is in the initial state, the fitting portion 12 has an outer diameter D1 and a length L1, and is configured to be in interference fit with the through hole 105, and the shaft member is securely connected with the through hole 105. When the shaft element is in the deformed state, the outer diameter of the assembling part 12 is D2, the length is L2, wherein D1 is more than D2, L1 is less than L2, and the shaft element is used for being in clearance fit with the through hole 105. More specifically, the shaft further comprises a clamping part 11, the shaft is provided with a blind hole 15 along the axial direction, and the blind hole 15 penetrates through the clamping part 11 and the assembling part 12 in sequence. Interference fit is often needed to be used in various mechanical connections, at this moment, after the processing of the shaft is completed, the shaft is in an initial state, namely, the outer diameter of the shaft is larger than the diameter of the through hole 105, before the shaft is installed in the through hole 105, the shaft can be driven to extend along the axial direction under the action of external force, so that the shaft is in a deformation state, the shaft can form clearance fit with the through hole 105, namely, the outer diameter of the shaft is smaller than the diameter of the through hole 105, so that a gap is formed between the side wall of the shaft and the side wall of the through hole 105, the shaft can be easily assembled in the through hole 105, then the external force is removed, the shaft is recovered to the initial state, the gap is eliminated, the shaft and the through hole 105 form interference fit, and the installation is completed. Meanwhile, since the length of the assembling portion 12 is changed from L2 back to L1, the pre-tightening force can be applied at the same time, so that the connection is more stable. Changing the shaft member to the deformed state again allows easy removal of the shaft member from the through hole 105 without damaging the shaft member and the through hole 105 due to barbs on the surface of the shaft member and the inner wall of the through hole 105.

With continued reference to fig. 1, the shaft further includes a limiting portion 13 and a connecting portion 14, the assembling portion 12 is located between the limiting portion 13 and the connecting portion 14, and the outer diameter of the limiting portion 13 is greater than D1, so that the assembling portion 12 can be limited and the assembling portion 12 can be located in the through hole 105. Similarly, the attachment portion 14 is used to attach connectors having an outer diameter greater than D1.

With continued reference to fig. 1, the shaft may be a shaft, and may also be a bolt, a screw, or the like, in this embodiment, the shaft is a bolt, specifically, the connecting member is a nut 106, the connecting portion 14 has an external thread, and the nut is in threaded connection with the connecting portion 14.

Fig. 2 shows a schematic structural diagram of a shaft fitting tool in an embodiment of the invention. Referring to fig. 2, the embodiment further provides an axle assembly fixture, which includes the axle. The shaft assembly tool further comprises a top supporting rod 2, a driving piece 3 and a clamping piece 4, when the top supporting rod 2 is inserted into the blind hole 15 and is abutted against the bottom wall of the blind hole 15, the shaft is in a deformation state, and when the top supporting rod 2 is separated from the bottom wall of the blind hole 15, the shaft is in an initial state. The driving piece 3 is used for driving the top support rod 2 to tightly abut against the bottom wall of the blind hole 15, so that the shaft piece deforms to a deformation state, namely the outer diameter of the shaft piece is reduced from D1 to D2, the length of the shaft piece is extended from L1 to L2, the shaft piece is in clearance fit with the through hole 105, and the shaft piece is conveniently assembled and disassembled on and from the through hole 105. The holder 4 is for holding the holder 11. Optionally, the bottom wall of the blind hole 15 is perpendicular to the axis of the shaft, the end face of the end, contacting the bottom wall of the blind hole 15, of the top stay bar 2 is a plane, and when the two are abutted tightly, the end face of the top stay bar 2 is completely contacted with the bottom wall, so that the side slip is prevented. Optionally, the length of the top stay 2 is greater than the depth of the blind hole 15, so that the driving piece 3 can apply driving force to the top stay 2 conveniently.

With continued reference to fig. 2, the clamping portion 11 is located at the end of the shaft and the clamping member 4 is fixed to the driving member 3. Specifically, in the present embodiment, the limiting portion 13 is located between the clamping portion 11 and the mounting portion 12, that is, the shaft member is, in order from one end to the other end, the clamping portion 11, the limiting portion 13, the mounting portion 12, and the connecting portion 14. In other embodiments, other structures are also possible, such as the clamping portion 11 disposed on the limiting portion 13.

With continued reference to fig. 2, the driving member 3 further includes a driving member body 31 and a telescopic rod 32 slidably disposed on the driving member body 31, the driving member body 31 is fixedly connected to the clamping member 4, and the telescopic rod 32 is configured to drive the top stay 2 to move, so that the top stay 2 changes the state of the shaft member. Specifically, the driving member 3 further includes an oil pump 33, the oil pump 33 is used for driving the telescopic rod 32 to slide relative to the driving member body 31, and the volume of the oil pump 33 should be set as small as possible for convenient carrying. More specifically, an oil groove is formed in the driving member body 31, one end of the telescopic rod 32 is located in the oil groove, and the oil groove drives the telescopic rod 32 to slide relative to the driving member body 31 through the change of the oil amount in the groove. The driving member 3 further includes an oil inlet pipe 341 and an oil outlet pipe 342, two ends of the oil inlet pipe 341 are respectively connected to the oil pump 33 and the oil groove for injecting the hydraulic oil in the oil pump 33 into the oil groove, two ends of the oil outlet pipe 342 are respectively connected to the oil groove and the oil pump 33 for guiding the hydraulic oil in the oil groove back to the oil pump 33, and the above processes are driven by the oil pump 33. Wherein, when the oil pump 33 pours hydraulic oil into the oil groove, advance oil pipe 341 and oil groove intercommunication, go out oil pipe 342 and close, specifically say, be provided with the control valve on going out oil pipe 342, the control valve is used for controlling opening and closing of going out oil pipe 342, and when oil pump 33 was towards the interior oiling of oil groove, the control valve controlled out oil pipe 342 and was closed. Similarly to the above process, the oil inlet pipe 341 is also provided with a control valve, and when the oil pump 33 controls the return of the hydraulic oil to the oil pump 33, the oil outlet pipe 342 communicates with the oil tank, and the oil inlet pipe 341 is closed under the control of the control valve.

With continued reference to fig. 2, in the present embodiment, the clamping portion 11 is screwed to the clamping member 4, and the screw connection can withstand a large driving force, and is stable and not easy to fail. In other embodiments, the outer surface of the clamping portion 11 and the clamping member 4 may be detachably connected by a pin connection or the like.

With continued reference to fig. 2, when the shaft member is deformed from the initial state to the deformed state, the displacement of the top stay 2 abutting against the end surface of the bottom wall of the blind hole 15 is equal to the deformation of the fitting part 12, i.e., L2-L1. Since the length of the top stay 2 is reduced by the extrusion during the movement, the difference between the length of the top stay 2 and the depth of the blind hole 15 is larger than L2-L1. Alternatively, the stiffness of the top stay 2 is greater than that of the shaft member, so that the top stay 2 does not have to be set excessively long.

With continued reference to fig. 2, the blind hole 15 is cylindrical and the axis of the blind hole 15 coincides with the axis of the shaft member. When the top stay bar 2 acts on the bottom wall of the blind hole 15, the deformation of the shaft piece along all radial directions of the blind hole 15 is consistent, so that the deformation amount of each position of the assembling part 12 is consistent and the deformation is uniform.

With continued reference to fig. 2, during the deformation of the shaft, the length of the blind hole 15 changes with the length of the fitting portion 12, when the shaft deforms from the initial state to the deformation state, the length of the blind hole 15 is layered, and accordingly, the inner diameter of the blind hole 15 is also reduced, and when the inner diameter of the blind hole 15 is reduced to be equal to the diameter of the top stay 2, the side wall of the top stay 2 exerts a force on the side wall of the blind hole 15 in the radial direction of the blind hole 15, so as to prevent the inner diameter from further reducing, thereby affecting the deformation of the fitting portion 12. To solve this problem, the top stay 2 is also cylindrical, and the diameter of the top stay 2 is smaller than the inner diameter of the blind hole 15. Meanwhile, a gap is formed between the top supporting rod 2 and the side wall of the blind hole 15, so that the top supporting rod 2 can be easily inserted into or pulled out of the blind hole 15.

Fig. 3 shows a schematic structural diagram of a shaft system in an embodiment of the present invention, and fig. 4 shows a schematic structural diagram of a shaft system except for a shaft member and a nut 106 in an embodiment of the present invention. Referring to fig. 3 to 4, the present embodiment further provides a shaft system, which includes the shaft member and a fitting member 100, where the fitting member 100 includes a first shaft 101 and a second shaft 102, a first flange 103 is fixedly disposed at one end of the first shaft 101, and a second flange 104 is fixedly disposed at one end of the second shaft 102. The shafting can be ship shafting, also can be other shafting, because the shaft member needs to set up blind hole 15 and causes the shaft member size great to need to be connected in the ring flange and the axle of great size, therefore the shafting is preferably the shafting that boats and ships stern axle and jackshaft constitute.

With reference to fig. 3 to 4, the fitting member is provided with a through hole 105, the through hole 105 includes a first through hole 1051 provided on the first flange plate 103 and a second through hole 1052 provided on the second flange plate 104, the shaft member is connected to the through hole 105, specifically, a part of the fitting portion 12 is inserted through the first through hole 1051 in an interference manner, and the other part is inserted through the second through hole 1052 in an interference manner. Optionally, the shafting further comprises a nut 106, and the nut 106 is in threaded connection with the connecting portion 14. Preferably, there are two nuts 106, the two nuts 106 are respectively screwed on the connecting portion 14, and the two nuts 106 abut against each other to perform locking.

Fig. 5 shows a schematic structural diagram of a shaft assembly fixture and a shaft system in an embodiment of the present invention, and the following describes in detail the installation method of the shaft system in the embodiment with reference to fig. 1 to 5:

the first shaft 101 and the second shaft 102 are disposed at positions such that the first flange 103 on the first shaft 101 abuts against the second flange 104 on the second shaft 102, and the two through holes 105 communicate. Then, the shaft member is installed, and it should be noted that the shaft member should be processed according to the diameter of the through hole 105, for example, when the shaft system is a stern shaft and a middle shaft of a ship, the shaft member is processed according to relevant classification society specifications, and the outer diameter of the assembling portion 12 is slightly larger than the inner diameter of the through hole 105, so that the two can form an interference fit. After the machining is completed, the shaft member is in an initial state, i.e., D1 is larger than the inner diameter of the through-hole 105.

The installation process of the shaft part is as follows: firstly, the top stay 2 is inserted into the blind hole 15, the position of the top stay 2 is adjusted to make one end face of the top stay 2 cling to the bottom wall of the blind hole 15, the clamping member 4 is clamped at the clamping part 11, in this embodiment, the top stay and the clamping member are in threaded connection, the telescopic rod 32 cling to the other end face of the top stay 2, the oil pump 33 is started, the oil pump 33 drives hydraulic oil to enter the oil groove from the oil inlet pipe 341, the telescopic rod 32 is driven to slide relative to the driving member body 31 in the direction towards the assembling part 12, and further the top stay 2 is driven to move along the axial direction of the blind hole 15, so as to jack up the bottom wall of the blind hole 15, meanwhile, as the clamping part 11 is fixed relative to the clamping member 4, the shaft member is stretched along the axial direction, during the process, the length and the outer diameter of the assembling part 12 are continuously measured until the length of the assembling part 12 is changed from L1 to L2, and simultaneously, the outer diameter of the assembling part 12 is changed from D1 to D2, and D2 is smaller than the inner diameter of the through hole 105, the shaft is in a deformed state at this time, and the fitting portion 12 and the through hole 105 can form a clearance fit. The shaft is fitted into the through hole 105, the fitting portion 12 is fitted into the through hole 105, and the stopper portion 13 abuts against one of the first flange 103 and the second flange 104. Then, the nut 106 is mounted on the connecting portion 14 and is abutted against the other of the first flange 103 or the second flange 104. The oil pump 33 is started again to enable the hydraulic oil to return to the oil pump 33 from the oil groove through the oil outlet pipe 342, the telescopic rod 32 slides back to the assembling portion 12 relative to the driving piece body 31, the top support rod 2 does not apply acting force on the bottom wall of the blind hole 15 any more, the shaft returns to the initial state, and the assembling portion 12 and the through hole 105 form interference fit. The shaft removal process is similar to that described above and will not be described in detail. Except that the nut 106 is removed after changing the shaft member to the deformed state and then the shaft member is pulled out of the through hole 105.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An axle element, made of an elastic material, comprising:

a clamping portion (11);

the assembling part (12) is used for being installed in a through hole (105) of the fitting piece (100), a blind hole (15) is formed in the axial direction of the shaft piece, and the blind hole (15) penetrates through the clamping part (11) and the assembling part (12) in sequence; the shaft piece is provided with an initial state and a deformation state, when the shaft piece is in the initial state, the outer diameter of the assembling part (12) is D1, the length of the assembling part is L1, and the assembling part is used for being in interference fit with the through hole (105); when the shaft piece is in a deformation state, the outer diameter of the assembling part (12) is D2, the length is L2, the shaft piece is used for being in clearance fit with the through hole (105), wherein D1 is larger than D2, and L1 is smaller than L2.

2. The shaft element according to claim 1, further comprising a limiting portion (13) and a connecting portion (14), wherein the assembling portion (12) is located between the limiting portion (13) and the connecting portion (14), the limiting portion (13) has an outer diameter larger than D1, and the connecting portion (14) is used for connecting a connecting element, and the connecting element has an outer diameter larger than D1.

3. A shaft according to claim 2, characterized in that the connecting member is a nut (106), the connecting portion (14) having an external thread, the nut (106) being in threaded connection with the connecting portion (14).

4. An axle assembly tool, characterized by comprising the axle of any one of claims 1-3, and further comprising:

the top supporting rod (2) is inserted into the blind hole (15), and when the top supporting rod (2) is tightly abutted against the bottom wall of the blind hole (15), the shaft part is in a deformation state; when the top supporting rod (2) is separated from the bottom wall of the blind hole (15), the shaft part is in an initial state;

the driving piece (3) is used for driving the top supporting rod (2) to be tightly abutted against the bottom wall of the blind hole (15);

a clamping piece (4) for clamping the clamping part (11).

5. The shaft assembly tooling according to claim 4, wherein the clamping part (11) is located at the end of the shaft, and the clamping part (4) is fixed to the driving part (3).

6. The shaft assembly tool according to claim 4, wherein the clamping part (11) is in threaded connection with the clamping part (4).

7. The shaft assembly tool according to claim 4, wherein the hardness of the top stay (2) is greater than that of the shaft.

8. The shaft assembly tool according to any one of claims 4 to 7, wherein the blind hole (15) is cylindrical, and the axis of the blind hole (15) coincides with the axis of the shaft.

9. The shaft assembly tool according to claim 8, characterized in that the top stay (2) is cylindrical and has a diameter smaller than the inner diameter of the blind hole (15).

10. A shafting, characterized by, include the axle element of claim 3, still include fitting piece (100), fitting piece (100) includes first axle (101) and second axle (102), first axle (101) one end is fixed and is provided with first ring flange (103), second axle (102) one end is fixed and is provided with second ring flange (104), seted up through-hole (105) on the fitting piece, through-hole (105) are including offering in first through-hole (1051) of first ring flange (103) and offering in second through-hole (1052) of second ring flange (104), partly interference of assembly portion (12) is worn to locate in first through-hole (1051), and another part interference is worn to locate in second through-hole (1052).