CN210577669U

CN210577669U - Trunnion hanging plate

Info

Publication number: CN210577669U
Application number: CN201921611194.3U
Authority: CN
Inventors: 杨慧; 韩骑兵; 殷建忠
Original assignee: Jiangsu Zhongyu Power Equipment Co Ltd
Current assignee: Jiangsu Zhongyu Power Equipment Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-19
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a trunnion hanging plate, which comprises lug plates, connecting shafts positioned at both sides of the lug plates and nuts in threaded fit with one ends of the two connecting shafts far away from the lug plates respectively, the side wall of the lug plate is provided with a connecting hole, the lug plate further comprises a rotating block fixed on the top wall of the lug plate, a first mounting column, a second mounting column and a limiting block, wherein the first mounting column, the second mounting column and the limiting block are respectively arranged at one end, away from the nut, of each connecting shaft; the hanging plate is in running fit with the connecting shaft, so that the direct acting force of wind vibration on the wire clamp is reduced, and the service life of the wire clamp is prolonged.

Description

Trunnion hanging plate

Technical Field

The utility model relates to a power transmission's technical field, in particular to trunnion link plate.

Background

In a power transmission line, a power fitting for connecting a cable by using a trunnion, such as a suspension clamp, a strain clamp, etc., needs to be suspended on a tower.

At present, a gudgeon hanging plate is generally adopted to fixedly connect a wire clamp on a tower, the wire clamp is fixedly connected with a cable, when the cable is influenced by wind and vibration, friction occurs between the wire clamp and the gudgeon hanging plate, the wire clamp can be damaged after long-term use, and the service life of the wire clamp is shortened; because the trunnion is mostly whole welded type, when the impaired needs of fastener were changed, need personnel to spend a large amount of time pulling down the trunnion, consuming time is hard, influences the use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a trunnion link plate, its advantage is: the disassembly and the assembly are convenient, and the wire clamp can be conveniently replaced by personnel; meanwhile, when the hanging plate is influenced by wind vibration, the hanging plate can be in running fit with the connecting shaft along with the swinging of the wire clamp, so that the direct acting force of the wind vibration on the wire clamp is reduced, and the service life of the wire clamp is prolonged.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a trunnion hanging plate comprises lug plates, connecting shafts positioned at two sides of the lug plates and nuts respectively in threaded fit with one ends of the two connecting shafts far away from the lug plates, the side wall of the ear plate is provided with a connecting hole, and also comprises a rotating block fixed on the top wall of the ear plate, a first mounting column, a second mounting column and a limiting block which are respectively arranged at one end of the two connecting shafts far away from the nut, the side wall of the two connecting shafts far away from the nut is provided with a limiting ring groove for the limiting block to slide along the circumferential direction, a first cavity is arranged in the rotating block, the two limiting blocks are oppositely arranged in the first cavity, rotating holes for inserting the connecting shaft, the first mounting column and the second mounting column into the first cavity are formed in the two side walls of the rotating block, the first cavity is internally provided with a drive limiting block which is inserted into the butt joint assembly in the limiting ring groove, and the side wall of the first mounting column is provided with a connecting assembly and a second mounting column which are fixedly connected.

Through the technical scheme, the connecting shaft is inserted into the first cavity; secondly, inserting a limiting block into the limiting ring groove by using the abutting assembly; then, the first mounting column is connected with the second mounting column through the connecting assembly, so that the rotating block can be stably supported; finally, the nut is rotated to fix the connecting shaft on the tower; the trunnion hanging plate formed by adopting the structure is convenient to disassemble and assemble and replace the lug plate, and meanwhile, when the trunnion hanging plate is influenced by wind shock, the hanging plate can be in running fit with the connecting shaft along with the swinging of the wire clamp, so that the direct acting force of the wind shock on the wire clamp is reduced, and the service life of the wire clamp is prolonged.

The utility model discloses further set up to: the butt subassembly is established spacing spring, locating plate and first screw on the telescopic link including telescopic link, the cover that sets up on the stopper lateral wall, the one end of spacing spring is fixed on the lateral wall of stopper, the other end and is fixed on the inner wall of first cavity, the telescopic link is kept away from outside the lateral wall that the one end of stopper extends the turning block, the lateral wall of locating plate is equipped with the through-hole, the lateral wall of turning block is equipped with the screw hole corresponding with the through-hole, first screw is from outer to inner inserts through-hole, threaded hole in proper order.

According to the technical scheme, firstly, the telescopic rod is pulled to move upwards, the limiting spring is compressed, and the connecting shaft, the first mounting column and the second mounting column can be inserted into the first cavity; secondly, the telescopic rod is released, and the limiting block can be inserted into the limiting ring groove by utilizing the elastic force of the limiting spring and is abutted against the bottom wall of the limiting ring groove; then insert through-hole, threaded hole in proper order with first screw from outer to inner, and then can fix the locating plate at the roof of turning block, avoid because exogenic action, lead to the stopper to remove from spacing annular in for the stopper is stable to be fixed in spacing annular, has improved the stability that the connecting axle is located first cavity.

The utility model discloses further set up to: coupling assembling includes with the connecting axle axial syntropy insert the post, double-phase relative the setting insert on inserting the post lateral wall, set up actuating lever and expanding spring on two insert relative lateral walls respectively, be equipped with the second cavity in inserting the post, expanding spring sets up in the second cavity, expanding spring's both ends stretch out the outer wall of inserting the post and respectively with two insert fixed connection, the lateral wall of inserting the post is equipped with the opening that supplies the insert to insert in the second cavity, the lateral wall of second erection column is equipped with the confession and inserts post male slot, the notch department of slot is equipped with confession insert male recess, two the actuating lever is kept away from the one end of insert and is extended the outer wall of inserting the post, the end wall that the insert was kept away from to the post is equipped with the regulation hole that supplies two actuating levers to remove along its radial, the end wall of inserting the post is equipped with the retaining member that is used for fixed two.

Through the technical scheme, the two driving rods are separated from each other along the radial direction of the adjusting hole, the telescopic spring is stretched at the moment, the driving rods can be abutted against the inner wall of the second cavity, and the inserting block penetrates out of the outer wall of the inserting column; secondly, aligning the inserting block with the groove to enable the inserting column to be inserted into the slot, and then inserting the inserting block into the groove; then, the two driving rods are fixed by utilizing the locking pieces, and the inserting block can be stably fixed in the groove, so that the first mounting column and the second mounting column can be stably connected; this connected mode makes things convenient for the dismouting for two connecting axles are stable to be connected, and then have improved the stability that the turning block rotated the process.

The utility model discloses further set up to: the retaining member is the locking plate who sets up on the actuating lever lateral wall, the locking plate passes through the second fix with screw and inserts the outer wall of post.

Through above-mentioned technical scheme, the setting of locking plate and second screw is fixed the actuating lever on inserting the post steadily, has improved the stability that the inserted block is located the recess.

The utility model discloses further set up to: the middle part of the telescopic spring is provided with a fixing rod fixed on the inner wall of the second cavity, and the extension direction of the telescopic spring is in the same direction as the radial direction of the inserted column.

Through above-mentioned technical scheme, set up the dead lever, play limiting displacement to expanding spring for expanding spring can stably stretch out and draw back.

The utility model discloses further set up to: the connecting shaft and the axis of the side wall of the first mounting column are provided with through grooves matched with the inserted columns in a threaded mode, the groove walls of the inserting grooves are provided with locking grooves communicated with the grooves, and the groove walls of the locking grooves and the side walls of the inserting blocks are provided with magnet stones.

Through above-mentioned technical scheme, insert the back in the recess with the inserted block, rotate and insert the post, and then can insert the inserted block locking inslot, two magnet this moment inhale with, can be with the inserted block stable fixation in the locking inslot to fixed stability between two connecting axles has been improved.

The utility model discloses further set up to: the lateral wall that first erection column and second erection column contacted all is equipped with the magnetism and seals up.

Through above-mentioned technical scheme, utilize the magnetic force of the sealed pad of magnetism, first erection column and second erection column closely attract each other with, and then improved the stability of fixing between two connecting axles.

The utility model discloses further set up to: the lateral wall that rotates the hole is equipped with the rubber expansion ring, the inner ring of rubber expansion ring and the outer wall laminating of connecting axle, the radial flexible of rotation hole is followed to the rubber expansion ring.

Through above-mentioned technical scheme, the setting of rubber expansion ring can avoid the dust to get into first cavity in, can lock the rotor shaft simultaneously, and then has improved the stability that turning block and connecting axle rotated the process.

To sum up, the utility model discloses following beneficial effect has:

1. after the connecting shaft is inserted into the first cavity, the limiting block is inserted into the limiting ring groove by using the abutting assembly, and the first mounting column is connected with the second mounting column by using the connecting assembly, so that the rotating block can be stably supported; the trunnion hanging plate formed by adopting the structure is convenient to disassemble, assemble and replace the lug plate, and when the trunnion hanging plate is influenced by wind shock, the hanging plate can be in running fit with the connecting shaft along with the swinging of the wire clamp, so that the direct acting force of the wind shock on the wire clamp is reduced, and the service life of the wire clamp is prolonged;

2. the telescopic rod is driven to move downwards, the limiting block can be inserted into the limiting ring groove, and the limiting block is abutted against the bottom wall of the limiting ring groove by the elastic force of the limiting spring; then, the first screws are sequentially inserted into the through holes and the threaded holes from outside to inside, so that the positioning plate is fixed on the top wall of the rotating block, the phenomenon that the limiting blocks move out of the limiting ring grooves due to the action of external force is avoided, the limiting blocks can be stably fixed in the limiting ring grooves, and the stability of the connecting shaft in the first cavity is improved;

3. set up the rubber expansion ring, can avoid the dust to get into first cavity in, can lock the rotor shaft simultaneously, and then improved the stability of turning block and connecting axle rotation process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is an overall top sectional structure diagram of the present embodiment.

Fig. 3 is an enlarged schematic view for embodying the portion a in fig. 2.

Fig. 4 is an enlarged schematic view for embodying the portion B in fig. 2.

Fig. 5 is a schematic view showing an internal structure of the locking groove and the second mounting post.

Fig. 6 is an enlarged schematic view for embodying a portion C in fig. 2.

Reference numerals: 1. an ear plate; 2. a connecting shaft; 3. a nut; 4. connecting holes; 5. rotating the block; 6. a first mounting post; 7. a second mounting post; 8. an abutment assembly; 81. a telescopic rod; 82. a limiting spring; 83. positioning a plate; 84. a first screw; 9. a connecting assembly; 91. inserting a column; 92. inserting a block; 93. a drive rod; 94. a tension spring; 10. a first cavity; 11. rotating the hole; 12. a limiting block; 13. a limiting ring groove; 14. a through hole; 15. a threaded hole; 16. a second cavity; 17. an opening; 18. a slot; 19. a groove; 20. an adjustment hole; 21. a locking member; 201. a locking plate; 202. a second screw; 22. fixing the rod; 23. a through groove; 24. a locking groove; 25. a magnet; 26. a magnetic gasket; 27. a rubber expansion ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

a trunnion scraper, refer to fig. 1, comprises a rectangular ear plate 1, the bottom end of the ear plate 1 is arranged in an arc shape, connecting shafts 2 are arranged at two sides of the ear plate 1, the outer walls of two ends of the connecting shafts 2 far away from the ear plate 1 are provided with threads, and the connecting shafts 2 are fixed on a tower frame through nuts 3; the side wall of the bottom of the ear plate 1 is provided with a connecting hole 4, so that a wire clamp can be conveniently suspended, and the wire clamp is finally fixed on the tower.

Referring to fig. 1 and 2, a turning block 5 is welded on the side wall of the top end of an ear plate 1, a first cavity 10 is arranged in the turning block 5, one end of each of two connecting shafts 2, which is far away from a nut 3, is respectively provided with a first mounting column 6 and a second mounting column 7, two side walls of the turning block 5 are respectively provided with a turning hole 11 for inserting the connecting shafts 2, the first mounting columns 6 and the second mounting columns 7 into the first cavity 10, the side wall of the connecting shaft 2, which is positioned in the first cavity 10, is provided with a limiting ring groove 13 along the circumferential direction thereof, the inner top wall of the first cavity 10 is provided with two opposite limiting blocks 12, an abutting component 8 for driving the limiting blocks 12 to be inserted into the limiting ring groove 13 is arranged in the first cavity 10, so that when the wire clamp is influenced by wind power, the wire clamp swings, and the limiting blocks 12 slide in the limiting ring groove 13, so that the turning, the service life of the wire clamp is prolonged;

in order to enhance the stability of connection between the two connecting shafts 2, the connecting assembly 9 is arranged on the side wall of the first mounting column 6 and is connected with the second mounting column 7, so that the two connecting shafts 2 are stably fixed in the first cavity 10, the stability of supporting the rotating block 5 is improved, and meanwhile, the rotating block 5 can be stably in running fit with the connecting shafts 2 along with the swinging of the wire clamp; because the fastener rubs with otic placode 1 for a long time, can take place wearing and tearing, lead to the fastener impaired, through setting up butt subassembly 8 and coupling assembling 9, make things convenient for the dismouting to change otic placode 1 and fastener, can hang the cable on the pylon steadily.

Referring to fig. 2, a rubber expansion ring 27 is arranged on the side wall of the rotation hole 11, and the rubber expansion ring 27 expands and contracts along the radial direction of the rotation hole 11, so that the first mounting column 6 and the second mounting column 7 can be conveniently inserted into the first cavity 10; the inner ring of the rubber telescopic ring 27 is tightly attached to the outer wall of the connecting shaft 2, so that dust can be prevented from entering the first cavity 10, and meanwhile, the rotating shaft can be locked, and the stability of the rotating process of the rotating block 5 and the connecting shaft 2 is improved.

Referring to fig. 2 and 3, two sets of abutting assemblies 8 are provided, one set of abutting assemblies 8 includes a telescopic rod 81 arranged on the top wall of the limiting block 12, a limiting spring 82 sleeved on the telescopic rod 81, a positioning plate 83 and a first screw 84, one end of the limiting spring 82 is fixed on the side wall of the limiting block 12, the other end of the limiting spring is fixed on the inner wall of the first cavity 10, the telescopic rod 81 is arranged in a vertical state, the top end of the telescopic rod 81 extends out of the top wall of the rotating block 5, a through hole 14 is formed in the side wall of the positioning plate 83, and a threaded hole 15 corresponding to the through hole 14; during installation, firstly, the telescopic rod 81 is pulled to move upwards, the limiting spring 82 is compressed, and the connecting shaft 2, the first installation column 6 and the second installation column 7 can be inserted into the first cavity 10; then, the telescopic rod 81 is released, and the limiting block 12 can be inserted into the limiting ring groove 13 by utilizing the elastic force of the limiting spring 82 and is abutted against the bottom wall of the limiting ring groove 13; then insert first screw 84 in through-hole 14, screw hole 15 in proper order from outside to inside, and then can fix locating plate 83 at the roof of turning block 5, avoid because the exogenic action, lead to stopper 12 to remove from spacing annular 13, make stopper 12 stabilize and fix in spacing annular 13, improved the stability that connecting axle 2 is located first cavity 10.

Referring to fig. 2 and 4, the connecting assembly 9 includes an insert post 91 penetrating through one of the connecting shafts 2 and in the same axial direction as the connecting shaft, two insert blocks 92 oppositely disposed on the side walls of the insert post 91, driving rods 93 respectively disposed on the opposite side walls of the two insert blocks 92, and a telescopic spring 94, a second cavity 16 is disposed in the insert post 91, the telescopic spring 94 is disposed in the second cavity 16, two ends of the telescopic spring 94 extend out of the outer wall of the insert post 91 and are respectively fixedly connected with the two insert blocks 92, an opening 17 for inserting the insert block 92 into the second cavity 16 is disposed on the side wall of the insert post 91, an insertion slot 18 for inserting the insert post 91 is disposed on the side wall of the second mounting post 7, a groove 19 for inserting the insert block 92 is disposed at the notch of the insertion slot 18, an outer wall of the insert post 91 extends out of one end of the driving rod 93 far from the insert block 92, an adjusting hole 20 for moving the two driving rods 93 is disposed on, the end wall of the insertion column 91 is provided with a locking piece 21 for fixing the two driving rods 93;

when the fixing is performed, firstly, the two driving rods 93 are mutually far away from each other along the radial direction of the adjusting hole 20, at the moment, the extension spring 94 is stretched, the driving rods 93 can be tightly abutted against the inner wall of the second cavity 16, and then the insertion block 92 penetrates through the outer wall of the insertion column; secondly, aligning the plug block 92 with the groove 19, so that the plug column is inserted into the slot 18, and then the plug block 92 is inserted into the groove 19; then, the two driving rods 93 are fixed by using the locking piece 21, and the inserting block 92 can be stably fixed in the groove 19, so that the first mounting column 6 and the second mounting column 7 can be stably connected; this connected mode makes things convenient for the dismouting for two connecting axles 2 are stably connected, and then have improved the stability that turning block 5 rotated the process.

Referring to fig. 4, the opposite side walls of the first mounting column 6 and the second mounting column 7 are provided with magnetic gaskets 26, and after the first mounting column 6 and the second mounting column 7 are inserted into the first cavity 10, the first mounting column 6 and the second mounting column 7 can be tightly attracted by using the magnetic force of the magnetic gaskets 26, so that the stability of fixation between the two connecting shafts 2 is improved.

Referring to fig. 4, the middle portion of the extension spring 94 is provided with a fixing rod 22 fixed on the inner wall of the second cavity 16, and the extension direction of the extension spring 94 is the same as the radial direction of the insertion column 91; the fixing rod 22 is arranged to limit the extension spring 94, so that the extension spring 94 can stably extend and retract.

Referring to fig. 4 and 5, through grooves 23 in threaded fit with the insert posts 91 are formed in the axial centers of the side walls of one connecting shaft 2 and the first mounting post 6, locking grooves 24 communicated with the grooves 19 are formed in the groove walls of the slots 18, the two locking grooves 24 are symmetrically arranged with respect to the groove center of the slot 18, and the side walls of the locking grooves 24 and the side walls of the insert blocks 92 are provided with magnet 25; because insert post 91 and connecting axle 2 and first erection column 6 threaded connection, insert the back in recess 19 with inserted block 92, rotate and insert post 91, and then can insert inserted block 92 in locking groove 24, and then two magnet 25 inhale with, can stably fix inserted block 92 in locking groove 24 to fixed stability between two connecting axles 2 has been improved.

Referring to fig. 4 and 6, the locking member 21 is a locking plate 201 respectively disposed on the side walls of the driving rod 93, and the locking plate 201 is fixed on the end wall of the insertion column 91 through a second screw 202, so as to fix the driving rod 93, thereby improving the stability of the insertion block 92 in the groove 19.

During the working process, the first mounting column 6, the second mounting column 7 and the two connecting shafts 2 are inserted into the first cavity 10, the telescopic rod 81 is pushed, the limiting block 12 can be abutted to the limiting ring groove 13 by utilizing the telescopic force of the limiting spring 82, the positioning plate 83 is fixed by the first screw 84, the limiting block 12 can be stably fixed in the limiting ring groove 13, and further when the wire clamp is subjected to wind shock, the lug plate 1 is rotatably connected with the connecting shafts 2 along with the swinging of the wire clamp, so that the direct acting force of wind shock on the wire clamp is reduced;

secondly, the two driving rods 93 are far away from each other, the inserting block 92 can penetrate out of the side wall of the inserting column 91 by utilizing the elastic force of the telescopic spring 94, then the inserting column 91 is inserted into the slot 18, the inserting block 92 is inserted into the groove 19, the inserting column 91 is rotated, and then the inserting block 92 can be rotated into the locking groove 24, and the two magnet stones 25 are attracted; then, the driving rod 93 is fixed by the second screw 202, so that the insertion block 92 is stably fixed in the locking groove 24, stable connection between the two connecting shafts 2 is realized, and the rotating block 5 can be stably and rotatably connected with the two connecting shafts 2.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a trunnion link plate, includes otic placode (1), is located connecting axle (2) of otic placode (1) both sides and with keep away from otic placode (1) one end screw-thread fit's nut (3) with two connecting axles (2) respectively, the lateral wall of otic placode (1) is equipped with connecting hole (4), its characterized in that: the device also comprises a rotating block (5) fixed on the top wall of the ear plate (1), a first mounting column (6), a second mounting column (7) and a limiting block (12) which are respectively arranged at one end of the two connecting shafts (2) far away from the nut (3), wherein the side wall of the two connecting shafts (2) far away from the nut (3) is provided with a limiting ring groove (13) for the limiting block (12) to slide along the circumferential direction, a first cavity (10) is arranged in the rotating block (5), the limiting blocks (12) are oppositely arranged in the first cavity (10), two side walls of the rotating block (5) are respectively provided with a rotating hole (11) for inserting the connecting shaft (2), the first mounting column (6) and the second mounting column (7) into the first cavity (10), a butting component (8) for driving a limiting block (12) to be inserted into a limiting ring groove (13) is arranged in the first cavity (10), the lateral wall of first erection column (6) is equipped with coupling assembling (9) and second erection column (7) fixed connection.

2. The trunnion clevis of claim 1, wherein: butt subassembly (8) establish spacing spring (82), locating plate (83) and first screw (84) on telescopic link (81) including setting up telescopic link (81), the cover on stopper (12) lateral wall, the one end of spacing spring (82) is fixed on the inner wall of first cavity (10) at the lateral wall of stopper (12), the other end, outside the lateral wall of turning block (5) is extended to the one end that stopper (12) were kept away from in telescopic link (81), the lateral wall of locating plate (83) is equipped with through-hole (14), the lateral wall of turning block (5) is equipped with screw hole (15) corresponding with through-hole (14), first screw (84) are by outer in inserting through-hole (14), screw hole (15) in proper order.

3. The trunnion clevis of claim 1, wherein: the connecting assembly (9) comprises an inserting column (91) which is axially equidirectional with the connecting shaft (2), two inserting blocks (92) which are oppositely arranged on the side wall of the inserting column (91), and driving rods (93) and telescopic springs (94) which are respectively arranged on the opposite side walls of the two inserting blocks (92), wherein a second cavity (16) is arranged in the inserting column (91), the telescopic springs (94) are arranged in the second cavity (16), the two ends of each telescopic spring (94) extend out of the outer wall of the inserting column (91) and are respectively fixedly connected with the two inserting blocks (92), the side wall of the inserting column (91) is provided with an opening (17) for the inserting block (92) to be inserted into the second cavity (16), the side wall of the second mounting column (7) is provided with an inserting slot (18) for the inserting column (91), a groove (19) for the inserting block (92) is arranged at the notch of the inserting column (18), and the driving rods (93) are far away from one end of the inserting block (92) and extend out of the outer wall of the inserting column, insert end wall that post (91) kept away from inserted block (92) and be equipped with regulation hole (20) that supply two actuating levers (93) to remove along its radial, the end wall of inserting post (91) is equipped with retaining member (21) that are used for fixed two actuating levers (93).

4. A trunnion clevis according to claim 3, wherein: retaining member (21) are locking plate (201) of setting on actuating lever (93) lateral wall, locking plate (201) are fixed the outer wall at post (91) through second screw (202).

5. A trunnion clevis according to claim 3, wherein: the middle part of the telescopic spring (94) is provided with a fixing rod (22) fixed on the inner wall of the second cavity (16), and the extending direction of the telescopic spring (94) is in the same direction with the radial direction of the inserting column (91).

6. A trunnion clevis according to claim 3, wherein: the connecting shaft is characterized in that the axial centers of the side walls of the connecting shaft (2) and the first mounting column (6) are provided with through grooves (23) which are in threaded fit with the inserting columns (91), the groove walls of the inserting grooves (18) are provided with locking grooves (24) communicated with the grooves (19), and the groove walls of the locking grooves (24) and the side walls of the inserting blocks (92) are provided with magnet stones (25).

7. The trunnion clevis of claim 1, wherein: and magnetic sealing gaskets (26) are arranged on the side walls of the first mounting column (6) and the second mounting column (7) which are in contact with each other.

8. The trunnion clevis of claim 1, wherein: the lateral wall that rotates hole (11) is equipped with rubber expansion ring (27), the inner ring of rubber expansion ring (27) and the outer wall laminating of connecting axle (2), the radial flexible of rotating hole (11) is followed in rubber expansion ring (27).