CN107387580A - One kind rises axle and shaft coupling connecting mode - Google Patents

One kind rises axle and shaft coupling connecting mode Download PDF

Info

Publication number
CN107387580A
CN107387580A CN201710775862.5A CN201710775862A CN107387580A CN 107387580 A CN107387580 A CN 107387580A CN 201710775862 A CN201710775862 A CN 201710775862A CN 107387580 A CN107387580 A CN 107387580A
Authority
CN
China
Prior art keywords
tensioner
helical teeth
nail
rivet nut
axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710775862.5A
Other languages
Chinese (zh)
Other versions
CN107387580B (en
Inventor
张坤
唐永红
王晓艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Electric Machine Federation Ltd
Original Assignee
Chongqing Electric Machine Federation Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Electric Machine Federation Ltd filed Critical Chongqing Electric Machine Federation Ltd
Priority to CN201710775862.5A priority Critical patent/CN107387580B/en
Publication of CN107387580A publication Critical patent/CN107387580A/en
Application granted granted Critical
Publication of CN107387580B publication Critical patent/CN107387580B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D1/093Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
    • F16D1/097Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring expansion only, e.g. with an expanded ring located between hub and shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The present invention relates to the connection technique field of shaft coupling, one kind is disclosed to rise axle and shaft coupling connecting mode, including axle and the shaft coupling of rising, rise and coupled between axle and shaft coupling by tension ring, tension ring is provided with multiple tensioner holes, multiple tensioner holes surround the rounded distribution in the center of circle of tension ring, tensioner is inserted with tightening piece in hole, rise and be arranged with the first annulus on axle, the second annulus is slidably connected on shaft coupling, tightening piece includes the first tensioner nail and the second tensioner nail, first tensioner nail is both connected on the first annulus, first tensioner nail includes the first rivet nut, the first helical teeth is equipped with first rivet nut, second tensioner nail is fixedly connected with the second annulus, second tensioner nail includes the second rivet nut, the second helical teeth is equipped with second rivet nut, second helical teeth is parallel with the first helical teeth, and second helical teeth offseted with the first helical teeth.It can realize that the stabilization to rise between axle and shaft coupling couples by the present invention, be easy to process and use.

Description

One kind rises axle and shaft coupling connecting mode
Technical field
The present invention relates to the connection technique field of shaft coupling, and in particular to one kind rises axle and shaft coupling connecting mode.
Background technology
Rise and couple the connection of generally use spline between axle and shaft coupling, i.e., in the connector side wall of shaft coupling in setting Spline, and external splines is set in axle upper surface of rising, by the cooperation between internal spline and external splines, realize rise axle and shaft coupling Between be stably connected with.But inside and outside spline needs special tool sharpening, process-cycle length, and machining accuracy needs to reach It is high just to can guarantee that rise between axle and shaft coupling normal couples, and splined surfaces need to be heat-treated, heat treatment also often by Manufacturer is carried out, and use is cumbersome.
The content of the invention
The invention is intended to provide one kind to rise axle and shaft coupling connecting mode, to realize that rise between axle and shaft coupling stable joins Connect, be easy to process and use.
To reach above-mentioned purpose, basic technology scheme of the invention is as follows:One kind rises axle and shaft coupling connecting mode, including Rise axle and shaft coupling, rises and is coupled between axle and shaft coupling by tension ring, and tension ring is provided with multiple tensioner holes, multiple tensioner holes Around the rounded distribution in the center of circle of tension ring, tensioner is inserted with tightening piece in hole, and the first annulus, the first annulus are arranged with the axle that rises It is slidably connected at and rises on axle, the second annulus is slidably connected on shaft coupling, tightening piece includes the first tensioner nail and the second tensioner nail, First tensioner nail is both connected on the first annulus, and the first tensioner nail includes the first rivet nut, and the first helical teeth is equipped with the first rivet nut, The one end of first helical teeth away from the first rivet nut is tilted to the surface of the first rivet nut, and the second tensioner nail is fixedly connected with the second annulus On, the second tensioner nail includes the second rivet nut, and the second helical teeth is equipped with the second rivet nut, and the second helical teeth is parallel with the first helical teeth, and Second helical teeth offsets with the first helical teeth.
The principle and advantage of this programme be:It will rise between axle and shaft coupling and be coupled by tension ring, be avoided by inside and outside Series of problems caused by spline connection, is easy to the processing and use of shaft coupling and the axle that rises.Tension ring is followed closely by multiple first tensioners Insertion with the second tensioner nail and be able to tensioner, be achieved in rising between axle and shaft coupling it is stable coupling, effectively prevent the axle that rises Depart from from shaft coupling.Multiple first tensioners nail and multiple second tensioners are followed closely into rounded distribution, be able to will be risen from 360 degree of directions Axle, which pushes against, to be fixed, and enhances the stable effect coupled between axle and shaft coupling that rises.In addition, the first tensioner nail is connected to the first annulus On, the second tensioner nail is connected on the second annulus, and the first annulus and the second annulus are promoted by being extruded to tension ring, you can will be complete Tension ring is strutted and the axle that rises is fixed in the first tensioner nail in portion and the second tensioner nail insertion tensioner hole, avoiding to rise Troublesome operation fixed one by one is marked closely, is easily installed and uses.Offseted between second helical teeth and the first helical teeth so that the first tensioner Interfixed between nail and the second tensioner nail, avoid the first tensioner nail or the second tensioner nail from departing from from tension ring.And the present invention Combined by using tension ring with tensioner nail and the axle that rises is fixed, tensioner degree has controllability, can be to a variety of The axle that rises of diameter is fixed.
Preferably, as an improvement, the first tensioner nail is internal to be provided with groove, is rotatably connected to rotating cylinder in groove, and first Helical teeth is connected on rotating cylinder, and the first helical teeth is slidably connected in the first rivet nut, and rotating cylinder is provided with the jack that section is triangle, The slotting spoon of triangular prism shape is slidably connected in jack, the first rivet nut is provided with the first groove coordinated with the second helical teeth, the second nail Body is provided with the second groove coordinated with the first helical teeth.After inserting spoon into jack, the water caltrop phase of the water caltrop and jack of spoon is inserted Coordinate, shape face between spoon and rotating cylinder of inserting coordinates.When rotate insert spoon when, rotating cylinder rotation will be driven by inserting spoon, so as to by the first helical teeth and Second helical teeth staggers, and the first helical teeth is pushed into the second groove by the extruding of tension ring, while the second helical teeth is also in tension ring It is pushed under extruding in the first groove, so as to which the first helical teeth to offset and the second helical teeth be staggered, is achieved in the first tensioner nail With the separation of the second tensioner nail, the first tensioner can be followed closely and the second tensioner nail takes out out of tension ring respectively, and carry out other The replacing of the axle that rises of diameter species, Renewal process are easy to operate.
Preferably, as an improvement, the first rivet nut and the second rivet nut are wedge-shaped in circle, and the first rivet nut and the second rivet nut One end close to each other is small end.In this way, when inserting the first rivet nut and the second rivet nut to tensioner hole, the first rivet nut can be reduced Pressure when the first rivet nut and the second rivet nut is inserted in the area contacted between tensioner hole, between the second rivet nut and tensioner hole, increase By force, it is easy to the insertion of the first rivet nut and the second rivet nut, saves power, convenient operation.
Preferably, as an improvement, the first tensioner nail also includes the first nail tail, and the second tensioner nail also includes the second nail Positioning hole is equipped with tail, the first nail tail and the second nail tail.Positioning hole on first nail tail can enter to the small end of the second rivet nut Row positioning, the positioning hole on the second nail tail can position to the small end of the first rivet nut, so as to keep the first tensioner nail and the Geo-stationary between two tensioners nail, ensure being stably connected between the first tensioner nail and the second tensioner nail, so as to realize the axle that rises Fixation between shaft coupling.
Preferably, as an improvement, the one end of the second rivet nut away from the second nail tail is fixedly connected with parameter, parameter face Second helical teeth.After the second rivet nut is inserted, parameter is extended to outside tension ring, and parameter can position to the second helical teeth, by marking When the first tensioner nail is inserted at axle, make the first helical teeth and parameter face, you can realize the face of the first helical teeth and the second helical teeth, protect Demonstrate,proving can effectively be fastened between the first helical teeth and the second helical teeth.
Preferably, as an improvement, there is fluorescence coating on parameter.Fluorescence coating enables parameter to light, and is easily installed When human eye observation's parameter position.
Preferably, as an improvement, the first helical teeth and the second helical teeth are equipped with multiple, and multiple first helical teeth are in the first nail It is arranged in order on body along the bearing of trend of the first rivet nut axis, multiple second helical teeth are in the second rivet nut along the second rivet nut axis Bearing of trend is arranged in order, and the second helical teeth is alternately distributed with the first helical teeth.Multiple first helical teeth and the second helical teeth alternate, and protect Being stably connected between the first tensioner nail and the second tensioner nail has been demonstrate,proved, connection dynamics therebetween has been enhanced, avoids its relative Slide.
Brief description of the drawings
Fig. 1 is a kind of axle and structure chart of shaft coupling connecting mode embodiment of rising of the present invention.
Fig. 2 is the structure chart of the first tensioner nail and the second tensioner nail in the embodiment of the present invention.
Fig. 3 is the profile that the first tensioner is followed closely in the embodiment of the present invention.
Embodiment
Below by embodiment, the present invention is further detailed explanation:
Reference in Figure of description includes:Rise axle 1, shaft coupling 2, tension ring 3, the first annulus 4, the second annulus 5, first Tensioner nail the 6, first rivet nut 7, first nail tail 8, the first helical teeth 9, the first groove 10, rotating cylinder 11, jack 12, slotting spoon 13, second are risen Mark closely the 14, second rivet nut 15, second nail tail 16, the second helical teeth 17, the second groove 18, positioning hole 19, parameter 20.
Embodiment is substantially as shown in Figure 1:One kind rises axle and shaft coupling connecting mode, including rise axle 1 and shaft coupling 2, and rise axle 1 Coupled between shaft coupling 2 by tension ring 3, tension ring 3 is provided with multiple tensioner holes, and multiple tensioner holes are around tension ring 3 The rounded distribution in the center of circle, tensioner are inserted with tightening piece in hole, and the first annulus 4 is arranged with the axle 1 that rises, and the first annulus 4 is slidably connected Rising on axle 1, the second annulus 5 is slidably connected on shaft coupling 2.Tightening piece includes the first tensioner nail 6 and the second tensioner nail 14, the One tensioner nail 6 is welded on the first annulus 4, as shown in Fig. 2 the first tensioner nail 6 includes the first rivet nut 7, it is equal in the first rivet nut 7 Provided with seven the first helical teeth 9, seven the first helical teeth 9 are arranged successively in the first rivet nut 7 along the bearing of trend of the axis of the first rivet nut 7 Row, the upper end of the first helical teeth 9 tilt to the surface of the first rivet nut 7.Second tensioner nail 14 is welded on the second annulus 5, and second Tensioner nail 14 includes the second rivet nut 15, is equipped with six the second helical teeth 17 in the second rivet nut 15, the second helical teeth 17 is in the second rivet nut It is arranged in order on 15 along the bearing of trend of the axis of the second rivet nut 15, the second helical teeth 17 is parallel with the first helical teeth 9, and the second helical teeth 17 Offseted with the first helical teeth 9.First rivet nut 7 and the second rivet nut 15 are wedge shaped, and the first rivet nut 7 and the second rivet nut 15 are close to each other One end be small end.First tensioner nail 6 also includes the first nail tail 8, and the second tensioner nail 14 also includes the second nail tail 16, the first nail tail 8 and second nail tail 16 on be equipped with positioning hole 19.The left end of second rivet nut 15 is welded with parameter 20, the second helical teeth of face of parameter 20 17, there is fluorescence coating on parameter 20.
As shown in figure 3, the inside of the first tensioner nail 6 is provided with groove, rotating cylinder 11 is rotatably connected in groove, the first helical teeth 9 welds It is connected on rotating cylinder 11, and the first helical teeth 9 is slidably connected in the first rivet nut 7, rotating cylinder 11 is provided with the jack that section is triangle 12, the slotting spoon 13 of triangular prism shape is slidably connected in jack 12, such as Fig. 2, the first rivet nut 7 is provided with and the second helical teeth 17 coordinates First groove 10, the second rivet nut 15 are provided with the second groove 18 coordinated with the first helical teeth 9.
In the present embodiment, during practical application, reference picture 1, when connection rises by axle 1 with shaft coupling 2, tension ring 3 is arranged on Between shaft coupling 2 and the axle 1 that rises, the second annulus 5 is pushed away to the left, the tensioner hole for making the second tensioner nail 14 insert one by one on tension ring 3 In, the parameter 20 of the second tensioner 14 left ends of nail extend out to the left side of tension ring 3, and the first helical teeth 9 is positioned.Then by first The first helical teeth 9 and the face of parameter 20 on tensioner nail 6, and the first annulus 4 is promoted to the right along the axle 1 that rises, the first tensioner is followed closely 6 one In one insertion tensioner hole, pass through the phase that offsets of the first helical teeth 9 and the second helical teeth 17 between the first tensioner nail 6 and the second tensioner nail 14 Mutually fasten, avoid the first tensioner nail 6 or the second tensioner nail 14 from deviating from during the axle 1 that rises rotates from tension ring 3, it is thus real The stable tensioner now to rise between axle 1 and shaft coupling 2.In positioning hole 19 on right-hand member insertion the second nail tail 16 of first tensioner nail 6, First tensioner nail 6 is positioned, meanwhile, in the positioning hole 19 on left end insertion the first nail tail 8 of the second tensioner nail 14, to the Two tensioners nail 14 is positioned, and thus, strengthens the positioning fixed effect to the first tensioner nail 6 and the second tensioner nail 14.
When need to change others rise axle 1 when, slotting spoon 13 is inserted in jack 12, and rotary insertion spoon 13, inserts spoon 13 and drive Rotating cylinder 11 rotates, and makes rotating cylinder 11 drive the first helical teeth 9 to rotate and insert the first helical teeth 9 in second groove 18, while second is oblique Tooth 17 is inserted in the first groove 10, and so as to which the first helical teeth 9 and the second helical teeth 17 mutually be staggered, the first tensioner is followed closely into 6 from tensioner The separation that the first tensioner nail 6 and the second tensioner nail 14 can be achieved is taken out in hole, consequently facilitating the replacing for the axle 1 that rises.
Being stably connected between axle 1 and shaft coupling 2 of rising can not only be realized using the technical program, and installed soon, just In dismounting, suitable for practicality.
Above-described is only embodiments of the invention, the general knowledge such as known concrete technical scheme and/or characteristic in scheme Do not describe excessively herein.It should be pointed out that for those skilled in the art, before technical solution of the present invention is not departed from Put, several modifications and improvements can also be made, these should also be considered as protection scope of the present invention, and these are all without influence sheet Invent the effect and practical applicability implemented.The scope of protection required by this application should be based on the content of the claims, The records such as the embodiment in specification can be used for the content for explaining claim.

Claims (7)

  1. Axle and shaft coupling connecting mode 1. one kind rises, including rise axle and shaft coupling, rise and are joined between axle and shaft coupling by tension ring Connect, the tension ring is provided with multiple tensioner holes, and multiple tensioner holes surround the rounded distribution in the center of circle of tension ring, in tensioner hole It is inserted with tightening piece, it is characterised in that:The first annulus is arranged with the axle that rises, the first annulus, which is slidably connected at, to rise on axle, described The second annulus is slidably connected on shaft coupling, the tightening piece includes the first tensioner nail and the second tensioner nail, and the first tensioner nail is equal It is connected on the first annulus, the first tensioner nail includes the first rivet nut, the first helical teeth is equipped with the first rivet nut, the first helical teeth is remote One end of first rivet nut is tilted to the surface of the first rivet nut, and the second tensioner nail is fixedly connected with the second annulus, the second tensioner Nail includes the second rivet nut, and the second helical teeth is equipped with the second rivet nut, and the second helical teeth is parallel with the first helical teeth, and the second helical teeth and the One helical teeth offsets.
  2. Axle and shaft coupling connecting mode 2. one kind according to claim 1 rises, it is characterised in that:In the first tensioner nail Portion is provided with groove, rotating cylinder is rotatably connected in groove, first helical teeth is connected on rotating cylinder, and the first helical teeth is slidably connected at In first rivet nut, the rotating cylinder is provided with the jack that section is triangle, and the slotting spoon of triangular prism shape, institute are slidably connected in jack State the first rivet nut and be provided with the first groove coordinated with the second helical teeth, the second rivet nut be provided with coordinate with the first helical teeth it is second recessed Groove.
  3. Axle and shaft coupling connecting mode 3. one kind according to claim 2 rises, it is characterised in that:First rivet nut and Two rivet nuts are wedge shaped, and the first rivet nut and the second rivet nut one end close to each other are small end.
  4. Axle and shaft coupling connecting mode 4. one kind according to claim 3 rises, it is characterised in that:The first tensioner nail is also Including the first nail tail, the second tensioner nail also includes the second nail tail, and positioning hole is equipped with the first nail tail and the second nail tail.
  5. Axle and shaft coupling connecting mode 5. one kind according to claim 4 rises, it is characterised in that:Second rivet nut is remote One end of second nail tail is fixedly connected with parameter, the helical teeth of parameter face second.
  6. Axle and shaft coupling connecting mode 6. one kind according to claim 5 rises, it is characterised in that:Have on the parameter glimmering Photosphere.
  7. Axle and shaft coupling connecting mode 7. one kind according to claim 6 rises, it is characterised in that:First helical teeth and Two helical teeth are equipped with multiple, and multiple first helical teeth are arranged in order in the first rivet nut along the bearing of trend of the first rivet nut axis, more Individual second helical teeth is arranged in order in the second rivet nut along the bearing of trend of the second rivet nut axis, and the second helical teeth replaces with the first helical teeth Distribution.
CN201710775862.5A 2017-08-31 2017-08-31 One kind rises axis and shaft coupling coupling structure Active CN107387580B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710775862.5A CN107387580B (en) 2017-08-31 2017-08-31 One kind rises axis and shaft coupling coupling structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710775862.5A CN107387580B (en) 2017-08-31 2017-08-31 One kind rises axis and shaft coupling coupling structure

Publications (2)

Publication Number Publication Date
CN107387580A true CN107387580A (en) 2017-11-24
CN107387580B CN107387580B (en) 2019-09-06

Family

ID=60347311

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710775862.5A Active CN107387580B (en) 2017-08-31 2017-08-31 One kind rises axis and shaft coupling coupling structure

Country Status (1)

Country Link
CN (1) CN107387580B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1491783A1 (en) * 2003-06-24 2004-12-29 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Clamping device for shaft-hub connection
DE102009001406A1 (en) * 2009-03-09 2010-09-23 Koenig & Bauer Aktiengesellschaft Device for fastening concentric portions of plug of cylinder of printing machine, has sleeve and nut which is partially arranged in sleeve, where multiple wedges form areas of sleeve or nut
CN205226117U (en) * 2015-12-08 2016-05-11 江苏新瑞重工科技有限公司 Inside and outside tooth coupling
CN206153589U (en) * 2016-08-29 2017-05-10 武汉重型机床集团有限公司 Fixed knot of boring bar constructs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1491783A1 (en) * 2003-06-24 2004-12-29 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Clamping device for shaft-hub connection
DE102009001406A1 (en) * 2009-03-09 2010-09-23 Koenig & Bauer Aktiengesellschaft Device for fastening concentric portions of plug of cylinder of printing machine, has sleeve and nut which is partially arranged in sleeve, where multiple wedges form areas of sleeve or nut
CN205226117U (en) * 2015-12-08 2016-05-11 江苏新瑞重工科技有限公司 Inside and outside tooth coupling
CN206153589U (en) * 2016-08-29 2017-05-10 武汉重型机床集团有限公司 Fixed knot of boring bar constructs

Also Published As

Publication number Publication date
CN107387580B (en) 2019-09-06

Similar Documents

Publication Publication Date Title
KR102499407B1 (en) Tapered lobe drivers and fasteners
EP2662052B1 (en) Dental implant and kit including said dental implant
KR102035408B1 (en) Negative drive angle
JP2013515937A5 (en)
CN104039509A (en) Tapered lobular driver and fastener
CA2565422A1 (en) Drill with releasably mounted cutting head
JP2012511436A5 (en)
CN1287034A (en) Drive, fastening piece and forming tool
JP2014529044A5 (en) Fasteners and torque transmission drivers
KR102532765B1 (en) Screw fastening tools and matching screws
US10968939B2 (en) Tapered lobular driver and fastener
US11098743B2 (en) Screws with socket head
EP3191260B1 (en) Tapered lobular driver and fastener
CN104622534A (en) Surgical handpiece
US20100104397A1 (en) Screw and driver bit
US7128513B2 (en) Screw and driver therefor
CN107387580A (en) One kind rises axle and shaft coupling connecting mode
US20160236332A1 (en) Driving head
CN103174723A (en) Fastening screw
WO2019007852A1 (en) An implant system
JP3127483U (en) Tightening screw hole structure for set screw members
CN201246400Y (en) Prick bottom spline shaft
JPS6327148Y2 (en)
JP2007247769A (en) Torque-transmitting mechanism
JPS60245820A (en) Nail

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A connecting structure between expansion shaft and coupling

Effective date of registration: 20230711

Granted publication date: 20190906

Pledgee: Industrial and Commercial Bank of China Limited Chongqing High tech Branch

Pledgor: CHONGQING ELECTRIC MACHINE FEDERATION Ltd.

Registration number: Y2023980047824