CN113387231A

CN113387231A - Wireless remote control cable winch equipment

Info

Publication number: CN113387231A
Application number: CN202110556485.2A
Authority: CN
Inventors: 丁雨欣; 丁明宏; 梁五元; 邱水林; 戴杰
Original assignee: Mingchuang Huiyuan Technology Group Co ltd; Yunnan Mingchuang Huiyuan Technology Co Ltd; Guizhou Mingchuang Huiyuan Technology Co Ltd
Current assignee: Mingchuang Huiyuan Changsha Mine Design And Research Institute Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-09-14
Anticipated expiration: 2041-05-21
Also published as: CN113387231B

Abstract

The invention discloses a wireless remote control cable winch device, which structurally comprises a device cabinet, a fixed seat, a driving shaft and a signal transceiver, wherein the upper surface of the device cabinet is integrally embedded and connected with the signal transceiver, the inside of the signal transceiver is in clearance fit with the inside of the driving shaft, the whole of the driving shaft is in clearance fit with the upper end of the fixed seat, the surface of the fixed seat is fixed with the bottom of the device cabinet through a bolt, the device cabinet comprises a stabilizer, a two-way motor, a reversing sleeve and a winch, the top end of the stabilizer is in clearance fit with the surface of the winch, the left side of the winch is in clearance fit with the inside of the reversing sleeve, a smoothing seat movably clamped on the surface of a wire carrier is matched with an autorotation inserting shaft and an inwards concave wire groove to clamp a cable inside a limiting plate for rotation when the cable is wound, so that the guidance performance when the cable is assisted by an appointed rotation circuit is achieved, and the cable is effectively prevented from being overlapped in a staggered manner when being wound, the problem of chuck phenomenon when the cable is led out during subsequent use is caused.

Description

Wireless remote control cable winch equipment

Technical Field

The invention relates to the field of cable equipment, in particular to wireless remote control cable winch equipment.

Background

The cable winch is mainly used for winding cables, the cables are gathered together through the rotation of the winch, the two original cable winches which can only be operated and wound are further upgraded along with the progress of modern science and technology, the winding and unwinding of the stirring disc can be realized through wireless remote control, and the convenience in use of the cable winch is improved to a great extent;

however, the prior art has the following defects: the current wireless remote control's cable reel equipment owing to just reversing through wireless receiver control driving motor, carries out the rolling through the capstan winch to the cable conductor after the use, and the capstan winch is because the crisscross overlapping together of cable conductor when gyration, and the cable conductor that leads to the rolling receives irregular extrusion winding, and then causes the cable conductor to be qualified for the next round of competitions easy the chuck phenomenon take place when following the use.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a wireless remote control cable winch device to solve the problem that in the prior art, due to the fact that the wireless receiver controls the forward and reverse rotation of the driving motor, a cable is wound through the winch after use, and the cable is overlapped in a staggered mode when the winch rotates, the wound cable is extruded and wound irregularly, and therefore the phenomenon of clamping during cable outgoing is prone to occur in the subsequent use process.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a wireless remote control's cable reel equipment, its structure includes equipment cabinet, fixing base, drive shaft, signal transceiver, the equipment cabinet upper surface is connected with the whole built-in of signal transceiver, the inside and the inside clearance fit of drive shaft of signal transceiver, the whole and fixing base upper end clearance fit of drive shaft, fixing base surface and equipment cabinet bottom bolt fastening, the equipment cabinet includes stabiliser, two-way motor, switching-over sleeve, capstan winch, stabiliser top and capstan winch surface clearance fit, capstan winch left side and the inside clearance fit of switching-over sleeve, the inside meshing with the two-way motor top of switching-over sleeve is connected, the whole clearance fit of two-way motor top and capstan winch.

The invention is further improved, the stabilizer comprises a top cable support, a support table, a pressure reducing pull rope and a telescopic column, wherein two sides of the top cable support are in clearance fit with the inside of the pressure reducing pull rope, the inner side of the pressure reducing pull rope is movably matched with the inside of the support table, the surface of the support table is nested and connected with the bottom of the telescopic column, two sides of the telescopic column are in clearance fit with the inner side of the top cable support, and the two top cable supports are distributed on the outer side of the telescopic column and are in clearance fit with the inner side of the pressure reducing pull rope.

The invention is further improved, the top cable support column comprises a pressed block, a sliding clamping jaw, a sliding groove and a spring column, the bottom surface of the pressed block is fixedly connected with the surface of the spring column in an embedded mode, the lower end of the spring column is connected with the surface of the sliding clamping jaw in a welded mode, the surface of the sliding clamping jaw is in sliding fit with the surface of the sliding groove, the upper end of the sliding groove is in clearance fit with the whole spring column, the sliding clamping jaws are distributed on the surface of the bottom of the spring column to be connected in a welded mode, and the surface of the sliding clamping jaw is in sliding fit with the surface of the sliding groove.

The invention is further improved, the compression block comprises an elastic strip, a limiting block, a scraping-proof block and a swing frame, two sides of the elastic strip are connected with the side wall of the limiting block in a clamping manner, the inner wall of the limiting block is fixedly embedded with the outer wall of the swing frame, the upper surface of the swing frame is integrally fixedly embedded with the scraping-proof block, the surface of the elastic strip is movably matched with the outer wall of the swing frame, the scraping-proof block is distributed on the surface of the swing frame for fixedly embedding connection, and the outer surface of the swing frame is in hinged fit with the surface of the elastic strip.

The winch is further improved, the winch comprises a wire carrying disc, an anti-falling pin and a limiting plate, the center of the wire carrying disc is integrally connected with the anti-falling pin in a nested mode, the inner side of the anti-falling pin is in clearance fit with the surface of the limiting plate, the inner side of the limiting plate is connected with the surface of the wire carrying disc in a clamping mode, and the anti-falling pin is distributed in the center positions of the outer sides of the wire carrying disc and the limiting plate and is fixed in a nested mode.

The wire carrier is further improved, the wire carrier comprises a smoothing seat, a fixing bolt, a chuck body and a pin connecting rope, two sides of the smoothing seat are movably clamped with the surface of the chuck body, the surface of the chuck body is fixed with the fixing bolt integrally, the surface of the fixing bolt is connected with the top end of the pin connecting rope in a nested manner, the surface of the pin connecting rope is in clearance fit with the bottom of the smoothing seat, the smoothing seats are distributed on the surface of the chuck body for movable clamping, the number of the smoothing seats is four, and the inner parts of the smoothing seats and the pin connecting rope form clearance fit.

The invention is further improved, the smoothing seat comprises guide wheels, a seat cavity, a damping sleeve and a fixing frame, the center of each guide wheel is fixedly connected with the top end of the fixing frame in an embedded mode, the fixing frame is integrally and movably matched with the inside of the seat cavity, the lower surface of the seat cavity is integrally and fixedly connected with the damping sleeve, the inside of the damping sleeve is connected with the bottom of the fixing frame in an embedded mode, the damping sleeve is distributed on the bottom surface of the seat cavity to be fixedly connected in an embedded mode, and the upper end of the damping sleeve is matched with the lower surface of the fixing frame in an embedded mode.

The guide wheel is further improved, the guide wheel comprises a self-rotation inserting shaft, an inner concave groove and a scraping-proof cushion block, the self-rotation inserting shaft is integrally connected with the inner part of the inner concave groove in a nested mode, the surface of the inner concave groove is in clearance fit with the inner side of the scraping-proof cushion block, two sides of the scraping-proof cushion block are in movable fit with the surface of the self-rotation inserting shaft, the inner concave grooves are distributed on the inner side of the scraping-proof cushion block to be in clearance fit, and the middle of the inner concave grooves is in hinged fit through the self-rotation inserting shaft.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects;

1. according to the invention, when the cable is wound by the winch, the cable is jacked by the cable jacking strut through the stabilizer, the sliding clamping jaw slides on the surface of the sliding channel under the matching of the spring column and the pressed block during jacking, so that the pushing pressure of the cable is released, and then the cable is jacked and closed by perfectly attaching the matched anti-scraping block and the surface of the cable, so that the compactness during winding of the cable is effectively improved, and the cable is prevented from being loosened when being folded.

2. According to the invention, the smoothing seat movably clamped on the surface of the wire carrying disc is matched with the self-rotation inserting shaft and the concave wire groove to clamp the cable in the limiting plate for rotation when the cable is wound, so that the guidance for assisting the winding of the cable according to an appointed rotation circuit is achieved, and the problem of chuck phenomenon when the cable is wound and is led out in subsequent use due to staggered overlapping of the cable is effectively avoided.

Drawings

Fig. 1 is a schematic structural view of a wireless remote controlled cable winch apparatus according to the present invention.

Fig. 2 is a schematic top view of the equipment cabinet of the present invention.

Fig. 3 is a schematic view of the internal structure of the stabilizer of the present invention.

Fig. 4 is a schematic view of the internal structure of the roof support of the present invention.

FIG. 5 is a schematic top view of the pressed block of the present invention.

FIG. 6 is a side view of the winch of the present invention.

Fig. 7 is a schematic view showing the internal structure of the carrier disc of the present invention.

Fig. 8 is a schematic view of the internal structure of the smoothing seat of the present invention.

Fig. 9 is a schematic top view of the guide wheel of the present invention.

In the figure: the device comprises an equipment cabinet-1, a fixed seat-2, a driving shaft-3, a signal transceiver-4, a stabilizer-11, a bidirectional motor-12, a reversing sleeve-13, a winch-14, a cable jacking strut-111, a supporting table-112, a pressure reducing pull rope-113, a telescopic column-114, a pressed block-a 1, a sliding claw-a 2, a sliding groove-a 3, a spring column-a 4, an elastic strip-a 11, a limiting block-a 12, a scratch-proof block-a 13, a swinging frame-a 14, a wire loading disc-141, a drop-proof pin-142, a limiting plate-143, a smoothing seat-b 1, a fixed bolt-b 2, a chuck body-b 3, a connecting pin rope-b 4, a guide wheel-b 11, a seat cavity-b 12, a damping sleeve-b 13, a fixed frame-b 14, a self-rotation inserting shaft-c 1, a self-b 3, a self-b 1, a self-b-35, a self-b-3, a self-b, An inner concave wire groove-c 2 and a scratch-proof cushion block-c 3.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

The invention is further described below with reference to the accompanying drawings:

example 1

As shown in figures 1 to 5:

its structure includes equipment cabinet 1, fixing base 2, drive shaft 3, signal transceiver 4, 1 upper surface of equipment cabinet is connected with signal transceiver 4 is whole to be embedded solid, the inside and 3 inside clearance fit of drive shaft of signal transceiver 4, the whole and 2 upper end clearance fits of fixing base of 3, 2 surfaces of fixing base and 1 bottom bolt fastening of equipment cabinet, equipment cabinet 1 includes stabiliser 11, two-way motor 12, switching-over sleeve 13,

capstan winch

14, 11 tops of stabiliser and 14 surface clearance fits of capstan winch, 14 left sides of capstan winch and 13 inside clearance fit of switching-over sleeve, the inside meshing with 12 tops of two-way motor of switching-over sleeve 13 is connected, 12 tops of two-way motor and 14 whole clearance fits of capstan winch.

The stabilizer 11 includes a top cable support 111, a support table 112, a pressure-reducing pull rope 113 and a telescopic column 114, two sides of the top cable support 111 are in clearance fit with the pressure-reducing pull rope 113, the inner side of the pressure-reducing pull rope 113 is in clearance fit with the inner side of the support table 112, the surface of the support table 112 is in nested connection with the bottom of the telescopic column 114, two sides of the telescopic column 114 are in clearance fit with the inner side of the top cable support 111, the top cable support 111 is provided with two parts which are distributed on the outer side of the telescopic column 114 and in clearance fit with the inner side of the pressure-reducing pull rope 113, and the telescopic column 114 is favorable for the matching support table 112 with the pressure-reducing pull rope 113 to extend and retract back so as to further push up and close the cable by the auxiliary top cable support 111.

The top cable support 111 comprises a compression block a1, a sliding jaw a2, a sliding groove a3 and a spring post a4, the bottom surface of the compression block a1 is fixedly connected with the surface of the spring post a4 in an embedded manner, the lower end of the spring post a4 is connected with the surface of the sliding jaw a2 in a welded manner, the surface of the sliding jaw a2 is in sliding fit with the surface of the sliding groove a3, the upper end of the sliding groove a3 is in overall clearance fit with the spring post a4, the sliding jaw a2 is distributed on the bottom surface of the spring post a4 in a welded manner, and the surface of the sliding jaw a2 is in sliding fit with the surface of the sliding groove a3, wherein the spring post a4 is beneficial to damping the surface of the cable, so that the cable is subjected to pressure release and buffering through a damping structure on the surface, and the cable is wound and tightened.

The pressed block a1 comprises an elastic strip a11, a limiting block a12, a scratch-proof block a13 and a swinging frame a14, the two sides of the elastic strip a11 are connected with the side wall of the limiting block a12 in a clamping manner, the inner wall of the limiting block a12 is fixedly connected with the outer wall of the swinging frame a14 in an embedded manner, the upper surface of the swinging frame a14 is fixedly connected with the scratch-proof block a13 in an integrated manner, the surface of the elastic strip a11 is movably matched with the outer wall of the swinging frame a14, the scratch-proof block a13 is distributed on the surface of the swinging frame a14 in an embedded manner, and the outer surface of the swinging frame a14 is hinged and matched with the surface of the elastic strip a11, wherein the scratch-proof block a13 is beneficial to avoiding the scratch of the surface of the cable in the process of jacking the cable, and can also further jacking the cable when the cable to prevent the cable from being rolled and loosened.

The specific working principle is as follows:

the invention achieves wireless remote control through the signal transceiver 4 on the fixed seat 2, then the driving shaft 3 on the fixed seat 2 is triggered by the equipment cabinet 1 to drive the winch 14, when the bidirectional motor 12 is driven to rotate to trigger the winch 14 by matching with the reversing sleeve 13, in the process of winding the cable, the cable surface is movably matched with the stabilizer 11, so that the top cable support 111 is contracted towards the inside of the support table 112 under the matching of the telescopic columns 114 at the two ends of the decompression pull rope 113 in the cable winding process, the sliding clamping jaw a2 slides on the inner surface of the sliding groove a3, the pressure block a1 at the top end buffers the pressure released from the wound cable under the matching of the spring column a4, the scratch-proof block a13 in the limiting block a12 is attached to the cable surface under the assistance of the elastic strip a11 and the swinging frame a14, the invention lifts the cable through the top cable support 111 when the winch 14 winds the cable, spring post a4 slides the jack catch a2 and slides on slideway a3 surface under the cooperation of piece a1 receives when the jacking for the pushing pressure of cable conductor releases, then prevents scraping piece a13 and the surperficial perfect laminating of cable conductor and close the cable conductor top in the cooperation, and the compactness when effectively having improved the cable conductor rolling is too not hard up when avoiding the cable conductor to draw in.

Example 2:

as shown in fig. 6 to 9:

the winch 14 comprises a wire carrying disc 141, a disengagement preventing pin 142 and a limiting plate 143, wherein the center of the wire carrying disc 141 is integrally connected with the disengagement preventing pin 142 in a nested manner, the inner side of the disengagement preventing pin 142 is in surface clearance fit with the limiting plate 143, the inner side of the limiting plate 143 is in surface clamping connection with the wire carrying disc 141, the disengagement preventing pin 142 is distributed at the outer center positions of the wire carrying disc 141 and the limiting plate 143 and is fixed in a nested manner, the limiting plate 143 is favorable for protecting the cable in the process of winding the cable, and meanwhile, the cable can be wound more neatly through the limiting plate 143.

The wire carrying disc 141 comprises a smoothing seat b1, a fixed bolt b2, a disc body b3 and a pin connecting rope b4, the two sides of the smoothing seat b1 are movably clamped with the surface of the disc body b3, the surface of the disc body b3 is fixed with the fixed bolt b2 through bolts, the surface of the fixed bolt b2 is connected with the top end of the pin connecting rope b4 in a nested mode, the surface of the pin connecting rope b4 is in clearance fit with the bottom of the smoothing seat b1, the smoothing seat b1 is distributed on the surface of the disc body b3 for movable clamping, four are arranged, the insides of the four are in clearance fit with the pin connecting rope b4, the smoothing seat b1 is favorable for bearing the wound-in cable, and the cable arrangement is smoothed by matching with the internal structure in the bearing process.

The smoothing seat b1 comprises a guide wheel b11, a seat cavity b12, a damping sleeve b13 and a fixing frame b14, the center of the guide wheel b11 is fixedly embedded in the top end of the fixing frame b14, the fixing frame b14 is integrally and movably matched with the inside of the seat cavity b12, the lower surface of the seat cavity b12 is integrally and fixedly embedded in the damping sleeve b13, the inside of the damping sleeve b13 is embedded and connected with the bottom of the fixing frame b14, the damping sleeve b13 is distributed on the bottom surface of the seat cavity b12 for embedding and connecting, and the upper end of the damping sleeve b14 is embedded and matched with the lower surface of the fixing frame b14, wherein the fixing frame b14 is favorable for supporting the guide wheel b11 and can be movably matched with the inside of the damping sleeve b13 at the lower end after being stressed, so that pressure buffering is achieved.

The guide wheel b11 comprises a rotation inserting shaft c1, an inner concave groove c2 and a scraping-proof cushion block c3, the rotation inserting shaft c1 is integrally connected with the inner portion of the inner concave groove c2 in a nested mode, the surface of the inner concave groove c2 is in clearance fit with the inner side of the scraping-proof cushion block c3, two sides of the scraping-proof cushion block c3 are in movable fit with the surface of the rotation inserting shaft c1, the inner concave grooves c2 are distributed on the inner side of the scraping-proof cushion block c3 in a clearance fit mode, the middle of the scraping-proof cushion block c3 is in hinged fit with the rotation inserting shaft c1, the inner concave groove c2 facilitates clamping of the surface of a wound cable, and the problem that the cable is not wound according to guide in the winding process and the cable is overlapped and extruded together in a staggered mode is avoided.

The specific working principle is as follows:

the coiled cable is carried by a wire carrying disc 141 in the stirring disc 14, the outer end of the coiled cable is fixed by a limiting plate 143 to a falling-off prevention pin 142, a smoothing seat b1 clamped on the surface of a clamping disc body b3 in the process of coiling the cable assists the cable rope, an internal fixing bolt b2 and a connecting pin rope b4 are matched to support the bottom of a smoothing seat b1, so that the surface of the cable is clamped by a concave slot c2 on the surface of a guide wheel b11 under the pressure of the cable, then a self-rotation inserting shaft c1 on two sides and a scraping-prevention cushion block c3 auxiliary guide wheel b11 rotate on the upper surface of a fixing frame b14, when the pressure is higher, the guide wheel b11 sinks towards the inside of a seat cavity b12, so that the fixing frame b14 is pressed to the inside a bottom shock-absorbing sleeve b13 to be nested, the guide wheel b11 is contracted to enter the seat cavity b 6 for storage, when the self-rotation inserting shaft 1 movably clamped on the surface of the wire carrying disc 141 is clamped in the self-rotation inserting shaft b 3527 c, the cable rope 73742 is matched with the concave slot c of the cable rope 1 c in the self-rotation inserting shaft b 73727 to be nested in the fixing frame b2 to store the cable rope The part rotates to reach the guidance quality when pressing appointed rotatory circuit auxiliary cable conductor rolling, effectively avoided the crisscross overlapping together of cable conductor when the rolling, the problem that the chuck phenomenon takes place when the cable conductor is qualified for the next round of competitions when causing follow-up use takes place.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein; any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a wireless remote control's cable reel equipment, its structure includes equipment cabinet (1), fixing base (2), drive shaft (3), signal transceiver (4), equipment cabinet (1) upper surface is connected with signal transceiver (4) whole embedded solid, signal transceiver (4) inside and drive shaft (3) inside clearance fit, drive shaft (3) whole and fixing base (2) upper end clearance fit, fixing base (2) surface and equipment cabinet (1) bottom bolt fastening, its characterized in that:

the equipment cabinet (1) comprises a stabilizer (11), a two-way motor (12), a reversing sleeve (13) and a winch (14), wherein the top end of the stabilizer (11) is movably matched with the surface of the winch (14), the left side of the winch (14) is in clearance fit with the inside of the reversing sleeve (13), the inside of the reversing sleeve (13) is meshed with the top end of the two-way motor (12), and the top end of the two-way motor (12) is in clearance fit with the whole winch (14).

2. A wireless remote controlled cable winch apparatus according to claim 1, wherein: the stabilizer (11) comprises a top cable support (111), a support platform (112), a pressure reducing pull rope (113) and a telescopic column (114), wherein the two sides of the top cable support (111) are in clearance fit with the inside of the pressure reducing pull rope (113), the inner side of the pressure reducing pull rope (113) is in movable fit with the inside of the support platform (112), the surface of the support platform (112) is connected with the bottom of the telescopic column (114) in a nested mode, and the two sides of the telescopic column (114) are in clearance fit with the inner side of the top cable support (111).

3. A wireless remote controlled cable winch apparatus according to claim 2, wherein: top cable pillar (111) is including receiving pressure piece (a 1), slip jack catch (a 2), sliding tray (a 3), spring post (a 4), receive pressure piece (a 1) bottom surface and spring post (a 4) surface embedded solid and be connected, spring post (a 4) lower extreme and slip jack catch (a 2) surface welded connection, slip jack catch (a 2) surface and sliding tray (a 3) surface sliding fit, sliding tray (a 3) upper end and the whole clearance fit of spring post (a 4).

4. A wireless remote controlled cable winch apparatus according to claim 3, wherein: the compression block (a 1) comprises an elastic strip (a 11), a limiting block (a 12), a scratch-resistant block (a 13) and a swinging frame (a 14), the two sides of the elastic strip (a 11) are connected with the side wall of the limiting block (a 12) in a clamping manner, the inner wall of the limiting block (a 12) is fixedly embedded with the outer wall of the swinging frame (a 14), the upper surface of the swinging frame (a 14) is fixedly embedded with the scratch-resistant block (a 13) integrally, and the surface of the elastic strip (a 11) is movably matched with the outer wall of the swinging frame (a 14).

5. A wireless remote controlled cable winch apparatus according to claim 1, wherein: the winch (14) comprises a wire carrying disc (141), an anti-dropping pin (142) and a limiting plate (143), wherein the center of the wire carrying disc (141) is integrally connected with the anti-dropping pin (142) in a nested mode, the inner side of the anti-dropping pin (142) is in surface clearance fit with the limiting plate (143), and the inner side of the limiting plate (143) is connected with the surface of the wire carrying disc (141) in a clamped mode.

6. A wireless remote controlled cable winch apparatus according to claim 5, wherein: wire carrier (141) are including smoothing out seat (b 1), gim peg (b 2), chuck body (b 3), link round pin rope (b 4), smooth out seat (b 1) both sides and chuck body (b 3) surface activity block, chuck body (b 3) surface and gim peg (b 2) whole bolt fastening, gim peg (b 2) surface and link round pin rope (b 4) top nested connection, link round pin rope (b 4) surface and smooth out in the order seat (b 1) bottom clearance fit.

7. A wireless remote controlled cable winch apparatus according to claim 6, wherein: smooth out with fingers seat (b 1) and include leading wheel (b 11), seat chamber (b 12), shock attenuation cover (b 13), mount (b 14), leading wheel (b 11) center is embedded fixedly with mount (b 14) top and is connected, mount (b 14) whole and seat chamber (b 12) inside movable fit, seat chamber (b 12) lower surface is embedded fixedly with shock attenuation cover (b 13) whole and is connected, inside and mount (b 14) bottom nested connection of shock attenuation cover (b 13).

8. A wireless remote controlled cable winch apparatus according to claim 7, wherein: the guide wheel (b 11) comprises a rotation inserting shaft (c 1), an inner concave groove (c 2) and a scraping-preventing cushion block (c 3), the rotation inserting shaft (c 1) is integrally connected with the inner part of the inner concave groove (c 2) in a nested mode, the surface of the inner concave groove (c 2) is in clearance fit with the inner side of the scraping-preventing cushion block (c 3), and the two sides of the scraping-preventing cushion block (c 3) are in surface movable fit with the rotation inserting shaft (c 1).