CN218539097U - Tower crane attached arm device for thin-wall structure construction - Google Patents

Abstract

The utility model relates to a building engineering technical field discloses a tower crane of thin-walled structure construction attaches arm device, including connected frame, one side of connected frame is provided with the linking arm, the one end of linking arm is provided with fine-tuning, fine-tuning includes flexible arm, flexible arm cover is established in one of linking arm and is served, be provided with the threaded rod on the flexible arm, just be provided with first rotating piece on the threaded rod, the cover is equipped with the movable block on the threaded rod, the both sides of movable block are provided with two articulated links respectively, two the one end of articulated link is articulated mutually with linking arm and flexible arm respectively, can make flexible arm stretch out and draw back on the linking arm through rotating first rotating piece, and then has avoided attaching the condition emergence that the arm was not installed, has improved the suitability of device.

Description

Tower crane attached arm device for thin-wall structure construction

Technical Field

The utility model relates to a building engineering technical field specifically is a tower crane of thin wall construction attaches arm device.

Background

The tower crane is the most common hoisting equipment on the construction site, also called tower crane, which is lengthened (high) section by section (called standard section for short) and is used for hanging construction raw materials such as reinforcing steel bars, wood ridges, concrete, steel pipes and the like for construction.

Chinese patent CN216687209U discloses an auxiliary tower crane arm attachment device, which comprises a tower crane arm attachment body, an oblique support and an overhanging steel beam, wherein a plurality of overhanging steel beams are fixed on a building main body structure nearest to a tower crane along the height direction, one end of the overhanging steel beam is a connecting end, the connecting end of the overhanging steel beam is fixed on the building main body structure through at least two groups of wall-penetrating bolts, the other end of the overhanging steel beam extends out of the building and is arranged in a suspension manner to form an overhanging end, one side of the overhanging end of the overhanging steel beam is provided with the oblique support to be connected with the building main body structure, and the other side is connected with the tower crane arm attachment body, so that the problem that a non-standard arm attachment member is adopted or is difficult to attach due to insufficient tower crane positioning arm attachment angle or outer vertical surface modeling is solved, the device can be recycled, and has convenient construction, simple structure, reliable performance and high safety, and provides effective support and help under the condition that the tower crane arm attachment is difficult and cannot be adjusted; but attaching the arm installation, can have certain error to lead to attaching the condition of arm length overlength or short excessively, the suitability is poor, attaches the arm and is connected through multiunit bolt with the building body, and the installation is troublesome, and attaches the arm installation and is difficult to realize diversified installation.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a tower crane of thin-walled structure construction attaches arm device possesses the fine setting, and simple installation and advantage such as diversified installation have been solved and have attached the arm installation, can have certain error to lead to attaching the condition of arm length overlength or short excessively, the suitability is poor, attaches the arm and is connected through the multiunit bolt with the building body, and the installation is troublesome, and attaches the problem that the arm installation is difficult to diversified installation.

(II) technical scheme

In order to solve the problem that a certain error exists in the installation process of the auxiliary arm, so that the situation that the length of the auxiliary arm is too long or too short is caused, the applicability is poor, the auxiliary arm is connected with a building body through a plurality of groups of bolts, the installation is troublesome, and the auxiliary arm is difficult to install in a multi-direction manner; the first rotating piece is rotated to drive the threaded rod to drive the movable block to move, and the movable block drives the two hinge rods to drive the telescopic arm to move along the direction of the connecting arm; the anti-disengaging mechanism is characterized in that a connecting mechanism is arranged on one side of the fine adjustment mechanism, an embedded part is arranged on one side of the connecting mechanism, the connecting mechanism is used for being connected with the embedded part, an anti-disengaging mechanism is arranged on one side of the embedded part, and a stabilizing mechanism is arranged on one side of the connecting arm and used for stabilizing the connecting arm.

Preferably, coupling mechanism includes fixed block, first recess and buckle, the one end fixed mounting of flexible arm has first universal joint, the fixed block with first universal joint fixed connection, first recess is seted up one side of fixed block, the buckle with fixed block normal running fit.

Preferably, the buckle includes a rotating shaft, a fixing rod, a clamping shaft and a stop block, the rotating shaft is rotatably fitted on the fixing block, one end of the rotating shaft penetrates through the first groove and extends out of the fixing block, the fixing rod is fixedly mounted at one end of the rotating shaft located outside the fixing block, the fixing rod is arranged above the fixing block, the clamping shaft is fixedly mounted at the bottom of the fixing rod, the clamping shaft is arranged at one side of the fixing block, the stop block is fixedly mounted on the rotating shaft, and the stop block is arranged in the first groove; in the process of matching the connecting mechanism and the embedded part, the connecting mechanism drives the rotating shaft, the fixed rod, the clamping shaft and the stop block to move simultaneously, after the stop block and the embedded part are extruded, the stop block drives the rotating shaft to drive the fixed rod to move, and the fixed rod drives the clamping shaft to move into the first groove.

Preferably, the embedded part is arranged in the first groove and is in sliding fit with the inner wall of the first groove, a barb is arranged on the outer wall of one side of the embedded part, an avoiding opening is formed in one side, away from the barb, of the embedded part, the avoiding opening is formed in the first groove and is matched with the rotating shaft, a hanging opening is formed in one side of the embedded part, and the clamping shaft is arranged in the hanging opening and is matched with the hanging opening.

Preferably, anti-disengaging mechanism includes the connecting block, be provided with the elastic component in the connecting block, sliding fit has the anticreep piece in the connecting block, the elastic component sets up the connecting block with between the anticreep piece, the inclined plane has been seted up on the anticreep piece.

Preferably, one side of linking frame is provided with the second universal joint, the linking arm with second universal joint fixed connection, the second recess has been seted up on the flexible arm, threaded rod normal running fit is in on the flexible arm, just the one end of threaded rod runs through the second recess and extends to outside the flexible arm, the movable block sets up in the second recess.

Preferably, stabilizing mean includes the internal thread sleeve, the internal thread sleeve with the linking arm is articulated mutually, two-way lead screw is installed to the internal thread sleeve internal thread, fixed mounting has the second to rotate the piece on the two-way lead screw.

Preferably, the inner side of the connecting frame is provided with a mounting block, and the top of the mounting block is provided with a mounting hole.

(III) advantageous effects

Compared with the prior art, the utility model provides a tower crane of thin wall construction attaches arm device possesses following beneficial effect:

1. this tower crane of thin-walled structure construction attaches arm device, through rotating first rotating member, first rotating member drive threaded rod drives the movable block motion, and the movable block drives two hinge bar motions and struts linking arm and flexible arm and increase length, can make flexible arm stretch out and draw back on the linking arm through rotating first rotating member, and then has avoided attaching the condition emergence that the arm installation is not last, has improved the suitability of device.

2. This tower crane of thin-walled structure construction attaches arm device, in the in-process of adjusting flexible arm, flexible arm drives the fixed block, first recess, the apparatus further comprises a rotating shaft, the dead lever, card axle and dog simultaneous movement, correspond first recess and built-in fitting in the motion process, the embedded fitting of continuous motion can contact with the dog and extrudees it, the dog drives pivot drive dead lever motion after receiving the extrusion, the dead lever drives the card axle and moves to the hang mouth on the embedded fitting and locks the built-in fitting in first recess, realize the auto-lock, the card axle can push the anticreep piece and make the anticreep piece move at rotatory in-process, the anticreep piece motion can push the elastic component and save certain elastic potential energy, after in the card axle motion hang mouth, the anticreep piece can resume to the initial position under the effect of elastic component elasticity, the first rotating member of reverse rotation drives flexible arm to retrieve after the cooperation is accomplished, flexible arm drives the card axle to tighten the built-in fitting and accomplishes the fixing, can make the buckle conflict with the built-in fitting accomplish the locking through adjusting flexible arm, installation simple and convenient for traditional bolt, and convenient operation, and the high altitude operating time of staff has been reduced, and the work efficiency has been improved.

3. This tower crane of thin-walled structure construction attaches arm device adjusts the second through needs and rotates the motion of the two-way screw drive internal thread sleeve of piece drive and adjust the angle between linking arm and the linking frame, can control the linking arm to be horizontal installation or be the angle installation according to the settlement position luffing motion linking arm of built-in fitting after the regulation is accomplished for this device mounting means increases, makes this device can diversely install.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

fig. 2 is a schematic view of a partial three-dimensional cross-sectional structure of the fine adjustment mechanism of the present invention;

fig. 3 is a schematic perspective sectional view of a part of the connection mechanism of the present invention;

FIG. 4 is a schematic view of a three-dimensional structure of the buckle part of the present invention;

FIG. 5 is a schematic view of a three-dimensional structure of the embedded part and the anti-falling mechanism of the present invention;

fig. 6 is a schematic view of the connection arm and telescopic arm connection three-dimensional structure of the present invention;

fig. 7 is a schematic perspective view of a part of the stabilizing mechanism of the present invention;

fig. 8 is a schematic perspective view of the connection frame of the present invention.

In the figure: 1. a connecting frame; 12. a connecting arm; 13. a first universal joint; 14. a second universal joint; 15. mounting a block; 16. mounting holes; 2. a fine adjustment mechanism; 21. a telescopic arm; 22. a threaded rod; 23. a first rotating member; 24. a movable block; 25. a hinged lever; 26. a second groove; 3. a connecting mechanism; 31. a fixed block; 32. a first groove; 33. buckling; 331. a rotating shaft; 332. fixing the rod; 333. clamping a shaft; 334. a stopper; 4. embedding parts; 41. a barb; 42. avoiding the mouth; 43. hanging the opening; 5. an anti-falling mechanism; 51. connecting blocks; 52. an anti-drop block; 6. a stabilizing mechanism; 61. an internally threaded sleeve; 62. a bidirectional lead screw; 63. a second rotating member.

Detailed Description

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

Referring to fig. 1-8, a tower crane auxiliary arm device for thin-wall structure construction includes a connecting frame 1, a connecting arm 12 is disposed on one side of the connecting frame 1, a fine adjustment mechanism 2 is disposed at one end of the connecting arm 12, the fine adjustment mechanism 2 includes a telescopic arm 21, the telescopic arm 21 is sleeved on one end of the connecting arm 12, a threaded rod 22 is disposed on the telescopic arm 21, a first rotating member 23 is disposed on the threaded rod 22, a movable block 24 is sleeved on the threaded rod 22, the movable block 24 is in threaded fit with the threaded rod 22, two hinge rods 25 are disposed on two sides of the movable block 24, one ends of the two hinge rods 25 are hinged to the movable block 24, and the other ends of the two hinge rods 25 are hinged to the connecting arm 12 and the telescopic arm 21; the first rotating part 23 is rotated to drive the threaded rod 22 to drive the movable block 24 to move, and the movable block 24 drives the two hinged rods 25 to drive the telescopic arm 21 to move along the direction of the connecting arm 12; one side of fine-tuning 2 is provided with coupling mechanism 3, and one side of coupling mechanism 3 is provided with built-in fitting 4, and coupling mechanism 3 is used for being connected with built-in fitting 4, and one side of built-in fitting 4 is provided with anti-disengaging mechanism 5, and one side of linking arm 12 is provided with stabilizing mean 6, and stabilizing mean 6 is used for stabilizing linking arm 12.

When the device is used for fixing a tower crane, an embedded part 4 can be embedded in a building, then a connecting frame 1 is sleeved and installed on the tower crane, after installation is completed, a stabilizing mechanism 6 is adjusted as required to support a connecting arm 12, after the connecting arm 12 is supported, the connecting arm 12 and the connecting frame 1 form a certain angle (the connecting arm 12 is not perpendicular to the connecting frame 1), after adjustment is completed, the connecting arm 12 can be swung up and down according to the set position of the embedded part 4 to control the connecting arm 12 to be horizontally installed or installed in an angle mode, when the distance between the connecting frame 1 and the embedded part 4 is larger than that of the attached arm device, a first rotating part 23 can be rotated, a first rotating part 23 drives a threaded rod 22 to drive a movable block 24 to move, the movable block 24 drives two hinged rods 25 to move to prop the connecting arm 12 and the telescopic arm 21 to expand to the set position, the connecting mechanism 3 corresponds to the embedded part 4 and continuously rotates the first rotating part 23, the connecting mechanism 3 can be matched with the embedded part 4 to achieve self-locking recovery of the first rotating part 23, after the embedded part is matched, the first rotating part 21 is reversely rotated to drive the telescopic arm 21 to achieve self-locking recovery, and the stretching of the connecting mechanism to fix the embedded part 4.

Further, the connecting mechanism 3 comprises a fixing block 31, a first groove 32 and a buckle 33, wherein a first universal joint 13 is fixedly mounted at one end of the telescopic arm 12, the fixing block 31 is fixedly connected with the first universal joint 13, the first groove 32 is formed in one side of the fixing block 31, and the buckle 33 is rotatably matched with the fixing block 31; in the process that the connecting mechanism 3 is matched with the embedded part 4, the first rotating part 23 is rotated to drive the fixed block 31, the first groove 32 and the buckle 33 move on the embedded part 4 at the same time, and in the moving process, the embedded part 4 is matched with the first groove 32 and extrudes the buckle 33 to drive the buckle 33 to rotate so as to fix the embedded part 4 and the connecting mechanism 3.

Further, the buckle 33 includes a rotating shaft 331, a fixing rod 332, a clamping shaft 333 and a stopper 334, the rotating shaft 331 is rotatably fitted on the fixing block 31, and one end of the rotating shaft 331 penetrates through the first groove 32 and extends out of the fixing block 31, the fixing rod 332 is fixedly installed at one end of the rotating shaft 331 located outside the fixing block 31, the fixing rod 332 is arranged above the fixing block 31, the clamping shaft 333 is fixedly installed at the bottom of the fixing rod 332, the clamping shaft 333 is arranged at one side of the fixing block 31, the stopper 334 is fixedly installed on the rotating shaft 331, and the stopper 334 is arranged in the first groove 32; in the process that the connecting mechanism 3 is matched with the embedded part 4, the connecting mechanism 3 drives the rotating shaft 331, the fixed rod 332, the clamping shaft 333 and the stop block 334 to move simultaneously, when the stop block 334 is extruded with the embedded part 4, the stop block 334 drives the rotating shaft 331 to drive the fixed rod 332 to move, and the fixed rod 332 drives the clamping shaft 333 to move into the first groove 32; in the process of installing and matching the connecting mechanism 3 and the embedded part 4, the connecting mechanism 3 drives the rotating shaft 331, the fixed rod 332, the clamping shaft 333 and the stop block 334 to move simultaneously, after the stop block 334 and the embedded part 4 are extruded, the stop block 334 drives the rotating shaft 331 to drive the fixed rod 332 to move, and the fixed rod 332 drives the clamping shaft 333 to move to lock the embedded part in the first groove 32 to complete fixing.

Further, the embedded part 4 is arranged in the first groove 32 and is in sliding fit with the inner wall of the first groove 32, a barb 41 is arranged on the outer wall of one side of the embedded part 4, an avoiding opening 42 is formed in one side of the embedded part 4, which is far away from the barb 41, the avoiding opening 42 is arranged in the first groove 32, the avoiding opening 42 is matched with the rotating shaft 331, a hanging opening 43 is arranged on one side of the embedded part 4, and the clamping shaft 333 is arranged in the hanging opening 43 and is matched with the hanging opening 43; the hanging opening 43 is used for matching with the clamping shaft 333.

Further, the anti-disengaging mechanism 5 includes a connecting block 51, an elastic member (the elastic member may be the prior art) is arranged in the connecting block 51, the anti-disengaging block 52 is slidably fitted in the connecting block 51, the elastic member is arranged between the connecting block 51) and the anti-disengaging block 52), and an inclined surface is formed on the anti-disengaging block 52; the anti-drop block 52 is squeezed and the anti-drop block 52 is moved in the rotation process of the clamping shaft, the elastic part can be squeezed and certain elastic potential energy can be stored by the movement of the anti-drop block 52, and after the clamping shaft 333 moves in the shaft hanging opening 43, the anti-drop block 52 can be restored to the initial position under the elastic force of the elastic part to prevent the clamping shaft 333 from being separated from the hanging opening 43.

Furthermore, one side of the connecting frame 1 is provided with a second universal joint 14, the connecting arm 12 is fixedly connected with the second universal joint 14, a second groove 26 is formed in the telescopic arm 21, the threaded rod 22 is in running fit with the telescopic arm 21, one end of the threaded rod 22 penetrates through the second groove 26 and extends to the outside of the telescopic arm 21, and the movable block 24 is arranged in the second groove 26.

Further, the stabilizing mechanism 6 comprises an internal thread sleeve 61, the internal thread sleeve 61 is hinged with the connecting arm 21, a bidirectional screw 62 is mounted in the internal thread of the internal thread sleeve 61, and a second rotating piece 63 is fixedly mounted on the bidirectional screw 62; the bidirectional screw 62 is driven by rotating the second rotating member 63 to drive the internally threaded sleeve 61 to move so as to adjust the angle between the connecting arm 12 and the connecting frame 1, and at the same time, the stability of the whole mechanism can be increased.

Further, the inner side of the connecting frame 1 is provided with a mounting block 15, and the top of the mounting block 15 is provided with a mounting hole 16; during installation, the connecting frame can be arranged between two standard sections of the tower crane and connected with the two standard sections through the mounting blocks 15.

The working principle is as follows: when the device is used for fixing a tower crane, the barbs 41 on the embedded part 4 can be embedded in a building, then the connecting frame 1 is sleeved between two standard sections on the tower crane and connected with the two standard sections through the mounting blocks 15 and the mounting holes 16, after the installation is finished, the second rotating part 63 is adjusted to drive the bidirectional screw 62 to drive the internal threaded sleeve 61 to move according to needs so as to adjust the angle between the connecting arm 12 and the connecting frame 1 (the connecting arm 12 is not vertical to the connecting frame 1), after the adjustment is finished, the connecting arm 12 can be vertically swung according to the set position of the embedded part 4 to control the horizontal installation or the angular installation of the connecting arm 12, when the distance between the connecting frame 1 and the embedded part 4 has a certain difference with the attached arm device, the first rotating part 23 can be rotated, the threaded rod 22 is driven by the first rotating part 23 to drive the movable block 24 to move, the movable block 24 drives the two hinged rods 25 to move to unfold the connecting arm 12 and the telescopic arm 21 to increase the length, meanwhile, the telescopic arm 21 drives the fixed block 31, the first groove 32, the rotating shaft 331, the fixed rod 332, the clamping shaft 333 and the stop block 334 move simultaneously, the first groove 32 corresponds to the embedded part 4 in the moving process, the embedded part 4 which moves continuously contacts with and extrudes the stop block 334, the stop block 334 drives the rotating shaft 331 to drive the fixed rod 332 to move after being extruded, the fixed rod 332 drives the clamping shaft 333 to move into the hanging opening 43 on the embedded part 4 and lock the embedded part 4 in the first groove 32 to realize self-locking, the clamping shaft 333 extrudes the anti-falling block 52 and enables the anti-falling block 52 to move in the rotating process, the anti-falling block 52 moves to extrude the elastic part and store certain elastic potential energy, after the clamping shaft 333 is in the hanging opening 43, the anti-falling block 52 can restore to the initial position under the elastic force of the elastic part, after the matching is finished, the first rotating part 23 is rotated reversely to drive the telescopic arm 21 to recover, and the telescopic arm 21 drives the clamping shaft 333 to tension the embedded part 4 to finish fixing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a tower crane of thin-walled structure construction attaches arm device, includes connecting frame (1), its characterized in that: one side of connecting frame (1) is provided with linking arm (12), the one end of linking arm (12) is provided with fine-tuning (2), fine-tuning (2) are including flexible arm (21), flexible arm (21) cover is established and is served at one of linking arm (12), be provided with threaded rod (22) on flexible arm (21), just be provided with first pivoted member (23) on threaded rod (22), the cover is equipped with movable block (24) on threaded rod (22), movable block (24) with threaded rod (22) screw-thread fit, the both sides of movable block (24) are provided with two hinge bar (25) respectively, two the one end of hinge bar (25) all with movable block (24) are articulated mutually, two the other end of hinge bar (25) articulates with linking arm (12) and flexible arm (21) respectively; the movable block (24) is driven to move by rotating the first rotating piece (23) to drive the threaded rod (22), and the movable block (24) drives the two hinged rods (25) to drive the telescopic arm (21) to move along the direction of the connecting arm (12); one side of fine tuning (2) is provided with coupling mechanism (3), one side of coupling mechanism (3) is provided with built-in fitting (4), coupling mechanism (3) are used for being connected with built-in fitting (4), one side of built-in fitting (4) is provided with anti-disengaging mechanism (5), one side of linking arm (12) is provided with stabilizing mean (6), stabilizing mean (6) are used for stabilizing linking arm (12).

2. The tower crane attached arm device for thin-wall structure construction according to claim 1, characterized in that: coupling mechanism (3) include fixed block (31), first recess (32) and buckle (33), the one end fixed mounting of flexible arm (21) has first universal joint (13), fixed block (31) with first universal joint (13) fixed connection, first recess (32) are seted up one side of fixed block (31), buckle (33) with fixed block (31) normal running fit.

3. The tower crane attached arm device for thin-wall structure construction according to claim 2, characterized in that: the buckle (33) comprises a rotating shaft (331), a fixing rod (332), a clamping shaft (333) and a stop block (334), the rotating shaft (331) is rotatably matched with the fixing block (31), one end of the rotating shaft (331) penetrates through the first groove (32) and extends out of the fixing block (31), the fixing rod (332) is fixedly installed at one end, located outside the fixing block (31), of the rotating shaft (331), the fixing rod (332) is arranged above the fixing block (31), the clamping shaft (333) is fixedly installed at the bottom of the fixing rod (332), the clamping shaft (333) is arranged on one side of the fixing block (31), the stop block (334) is fixedly installed on the rotating shaft (331), and the stop block (334) is arranged in the first groove (32); in the process of matching the connecting mechanism (3) with the embedded part (4), the connecting mechanism (3) drives the rotating shaft (331), the fixing rod (332), the clamping shaft (333) and the stop block (334) to move simultaneously, after the stop block (334) is extruded with the embedded part (4), the stop block (334) drives the rotating shaft (331) to drive the fixing rod (332) to move, and the fixing rod (332) drives the clamping shaft (333) to move into the first groove (32).

4. The tower crane attached arm device for thin-wall structure construction according to claim 3, wherein: built-in fitting (4) set up in first recess (32) and with first recess (32) inner wall sliding fit, be provided with barb (41) on the outer wall of one side of built-in fitting (4), built-in fitting (4) keep away from with one side of barb (41) has been seted up and has been dodged mouth (42), just dodge mouth (42) and set up in first recess (32), dodge mouth (42) with pivot (331) looks adaptation, one side of built-in fitting (4) is provided with and hangs mouth (43), card axle (333) set up in hanging mouth (43) and with hang mouth (43) looks adaptation.

5. The tower crane attached arm device for thin-wall structure construction according to claim 1, characterized in that: anti-disengaging mechanism (5) are including connecting block (51), be provided with the elastic component in connecting block (51), sliding fit has anti-disengaging piece (52) in connecting block (51), the elastic component sets up connecting block (51) with between anti-disengaging piece (52), the inclined plane has been seted up on anti-disengaging piece (52).

6. The tower crane attached arm device for thin-wall structure construction according to claim 1, characterized in that: one side of linking frame (1) is provided with second universal joint (14), linking arm (12) with second universal joint (14) fixed connection, second recess (26) have been seted up on flexible arm (21), threaded rod (22) normal running fit is in on flexible arm (21), just the one end of threaded rod (22) is run through second recess (26) and extend to outside flexible arm (21), movable block (24) set up in second recess (26).

7. The tower crane attached arm device for thin-wall structure construction according to claim 1, characterized in that: stabilizing mean (6) include internal thread sleeve (61), internal thread sleeve (61) with linking arm (12) are articulated mutually, two-way lead screw (62) are installed to internal thread sleeve (61), fixed mounting has the second to rotate piece (63) on two-way lead screw (62).

8. The tower crane attached arm device for thin-wall structure construction according to claim 1, characterized in that: the inner side of the connecting frame (1) is provided with a mounting block (15), and the top of the mounting block (15) is provided with a mounting hole (16).

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