CN219117026U

CN219117026U - Lifting device for assembled building

Info

Publication number: CN219117026U
Application number: CN202320163663.XU
Authority: CN
Inventors: 陆松伦; 唐玉娇; 喻虎; 金淑玉; 许霄腾
Original assignee: Shandong Youke Shangpin Energy Saving Technology Co ltd
Current assignee: Shandong Youke Shangpin Energy Saving Technology Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-06-02
Anticipated expiration: 2033-02-01

Abstract

The utility model relates to a hoisting device for assembled building, including the base, be equipped with hoisting platform on the base, base and hoisting platform are used for fixed trailing arm, trailing arm top fixed connection xarm to fix the xarm in the eminence. The telescopic shaft of the hoisting motor on the cross arm rotates to drive the reel to rotate, and the reel rotates in different directions to control the rope to slide along the pulley and further control lifting of the lifting hook. The hanging frame is abutted with the prefabricated wallboard, the clamping joint is driven to approach the prefabricated wallboard by shrinkage of the telescopic shaft of the clamping cylinder, and the edge of the prefabricated wallboard is embedded into the clamping joint and is tightly pressed, so that the prefabricated wallboard is fixed on the hanging frame. The lifting hook is connected with the lifting frame through the fixing rope, and lifting of the lifting hook drives lifting of the lifting frame and the prefabricated wallboard to realize lifting of the prefabricated wallboard. This application has the hoist and mount that make things convenient for prefabricated wallboard, uses manpower sparingly, improves the effect of hoist and mount efficiency.

Description

Lifting device for assembled building

Technical Field

The application relates to the field of assembly type building hoisting technical equipment, in particular to a hoisting device for an assembly type building.

Background

The assembled building is a building which is formed by transferring a large amount of field operation work in a traditional building mode to a factory, processing and manufacturing building components and accessories (such as floors, prefabricated wallboards, stairs, balconies and the like) in the factory, transporting to a building construction site, and assembling and installing in the field through a reliable connection mode, wherein a hoisting device is needed when the assembled building is assembled.

The related art can refer to the chinese patent with publication number CN213202168U and discloses an assembled building hoisting device, including supporting leg and bottom plate, the last fixed surface of bottom plate installs the backup pad, the last fixed surface of backup pad installs first hydraulic stem body, the opposite side fixed mounting of first hydraulic stem body has first support arm of force, the one end of first support arm of force is provided with the shaft, the surface of shaft is provided with the rim plate, the surface of rim plate sets up the steel cable, the one end fixed mounting of steel cable has the balancing weight, the lower fixed surface of balancing weight installs the lifting hook, one side of landing leg is all fixed mounting has the pushing hands. According to the assembled building lifting device, the stability of the lifting hook in the lifting or descending process can be maintained when the lifting hook lifts an object through the supporting arm of force.

To the relevant technique among the above-mentioned, adopt the lifting hook to hang and get prefabricated wallboard of assembled building, need pre-buried link in prefabricated wallboard manufacturing process, thereby use rope connection lifting hook and link to hang and get, need hang the link excision after the prefabricated wallboard installation is accomplished, the process is loaded down with trivial details, pre-buried and excision rings process consume more manpower, and efficiency is lower.

Disclosure of Invention

In order to facilitate the hoisting of prefabricated wallboard, use manpower sparingly, improve hoisting efficiency, this application provides a hoisting device for assembled building.

The application provides a hoisting device for assembled building adopts following technical scheme:

the utility model provides a hoisting device for assembled building, which comprises a base, be equipped with hoisting platform on the base, the vertical trailing arm that sets up of fixedly connected with on the hoisting platform, the horizontal arm that hoisting platform one end fixedly connected with level set up is kept away from to the trailing arm, fixedly connected with jack-up motor on the xarm, jack-up motor output shaft level sets up and coaxial fixedly connected with reel, fixedly connected with rope on the reel, the xarm is kept away from trailing arm one end and is rotated and is connected with the pulley, rope and pulley sliding connection and rope keep away from reel one end fixedly connected with lifting hook, lifting hook is connected with a plurality of fixed ropes, lifting hook one end is kept away from to the fixed rope is connected with the gallows, the gallows includes bracing piece and two dead levers, dead lever perpendicular to bracing piece and with bracing piece fixed connection, equal sliding connection in dead lever both ends has the joint that is used for fixing prefabricated wallboard, dead lever both ends equal fixedly connected with joint cylinder, the clamping cylinder is parallel to the dead lever setting and joint cylinder telescopic shaft and joint fixed connection.

By adopting the technical scheme, the base and the hoisting platform are used for fixing the longitudinal arm, and the top end of the longitudinal arm is fixedly connected with the transverse arm, so that the transverse arm is fixed at a high position. The telescopic shaft of the hoisting motor on the cross arm rotates to drive the reel to rotate, and the reel rotates in different directions to control the rope to slide along the pulley and further control lifting of the lifting hook. The hanging frame is abutted with the prefabricated wallboard, the clamping joint is driven to approach the prefabricated wallboard by shrinkage of the telescopic shaft of the clamping cylinder, and the edge of the prefabricated wallboard is embedded into the clamping joint and is tightly pressed, so that the prefabricated wallboard is fixed on the hanging frame. The lifting hook is connected with the lifting frame through the fixing rope, and lifting of the lifting hook drives lifting of the lifting frame and the prefabricated wallboard to realize lifting of the prefabricated wallboard. The hoisting of the prefabricated wallboard is convenient, the manpower is saved, and the hoisting efficiency is improved.

Optionally, the equal sliding connection in bracing piece both ends has the limiting plate that is used for the L shape of fixed prefabricated wallboard, and the equal fixedly connected with limiting cylinder in bracing piece both ends, limiting cylinder are on a parallel with the bracing piece setting and limiting cylinder telescopic shaft and limiting plate fixed connection.

Through adopting above-mentioned technical scheme, when hoist and mount prefabricated wallboard, the telescopic shaft shrink of spacing cylinder drives limiting plate to prefabricated wallboard one end slip until with prefabricated wallboard butt to the displacement of prefabricated wallboard in being on a parallel with the bracing piece direction has been restricted, makes prefabricated wallboard be fixed in on the gallows more steadily. The stability of the hoisting process is improved, and the safety of nearby workers is also improved.

Optionally, a first buffer layer is uniformly laid on the surface of one side, in contact with the prefabricated wallboard, of the clamping connector, and a second buffer layer is uniformly laid on the surface of one side, in contact with the prefabricated wallboard, of the limiting plate.

Through adopting above-mentioned technical scheme, buffer layer one and buffer layer two all adopt soft rubber material to make, have fine buffering and antiskid effect, can protect prefabricated wallboard to a certain extent, reduce its damage in the hoist and mount in-process. And simultaneously, the prefabricated wallboard can be fixed more firmly.

Optionally, the hoisting platform is rotatably connected to the base and the rotation shaft is vertically arranged.

Through adopting above-mentioned technical scheme, hoist and mount platform can rotate on the base, can drive trailing arm and xarm rotation, and then drive the prefabricated wallboard rotation of hoist and mount. The hoisting device can complete more complex hoisting tasks, and the application scene of the hoisting device is expanded.

Optionally, the hoisting platform is along circumference fixedly connected with annular rack, fixedly connected with rotation motor on the base, and rotation motor output shaft level sets up and fixedly connected with helical gear, helical gear and rack toothing.

Through adopting above-mentioned technical scheme, hoist and mount platform and the structural mass that connects are great, and manual rotation is wasted time and energy, has restricted hoist and mount efficiency to a certain extent. The rotation of the hoisting platform is controlled by adopting the rotating motor, and the machine replaces manpower, so that the manpower is saved, and the hoisting efficiency is improved.

Optionally, the hoisting platform includes roof and bottom plate, and the bottom plate rotates with the base to be connected and with rack chute fixed connection, roof and trailing arm fixed connection, fixedly connected with a plurality of vertical jack-up posts that set up on the bottom plate, roof sliding connection on the jack-up post, the jack-up cylinder of a plurality of vertical settings of fixedly connected with on the bottom plate, jack-up cylinder telescopic shaft keep away from bottom plate one end and roof fixed connection.

Through adopting above-mentioned technical scheme, roof sliding connection is on the jack-up post, can drive the lift of roof through the motion of jack-up cylinder telescopic shaft, and then drive the trailing arm and go up and down. The highest limit of the hoisting device is improved.

Optionally, a weight box is fixedly connected to one side of the top plate, which is far away from the cross arm, and a plurality of balancing weights are arranged in the weight box.

Through adopting above-mentioned technical scheme, the balancing weight is located roof and keeps away from xarm one side, can balance whole hoist device when hoist and mount, and then can hoist and mount the bigger object of quality. The maximum hoisting quality of the hoisting device is increased.

Optionally, the base bottom is equipped with and removes the round, and base side level rotation is connected with a plurality of support arms, and support arm keeps away from the vertical support cylinder that sets up of base one end fixedly connected with, supports cylinder telescopic shaft and sets up and fixedly connected with supporting head downwards, supports when cylinder telescopic shaft is in complete shrink state, and the supporting head is higher than in the vertical direction and removes the round bottom.

Through adopting above-mentioned technical scheme, remove the wheel and can make things convenient for hoist device nimble removal. When the lifting operation is not carried out, the supporting arm is rotated to a position close to the base, so that the occupied space of the lifting device is reduced, and the lifting device is convenient to move. During hoisting, each supporting arm is rotated, each supporting cylinder is far away from the base, the supporting cylinder telescopic shaft is started to drive the supporting head to move downwards, and the supporting head is abutted with the ground and enables the moving wheel to be separated from the ground. The balance moment of the lifting device is increased, so that the lifting device is not easy to topple over, and the stability of the lifting device is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during hoisting, the hanging frame is abutted to the prefabricated wallboard, the clamping cylinder telescopic shaft is contracted to drive the clamping joint to approach the prefabricated wallboard, the edge of the prefabricated wallboard is embedded into the clamping joint and is tightly pressed, so that the prefabricated wallboard is fixed on the hanging frame, the hanging frame is connected with the hanging frame through the fixing rope, the lifting of the hanging frame drives the hanging frame and the lifting of the prefabricated wallboard to realize the hoisting of the prefabricated wallboard, the hoisting of the prefabricated wallboard is facilitated, the labor is saved, and the hoisting efficiency is improved;

2. the hoisting platform and the structure connected with the hoisting platform are large in mass, and manual rotation is time-consuming and labor-consuming, so that hoisting efficiency is limited to a certain extent. The rotation of the hoisting platform is controlled by adopting the rotating motor, and the machine replaces manpower, so that the manpower is saved, and the hoisting efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the embodiment.

Fig. 2 is a schematic diagram of the internal structure of the embodiment.

Reference numerals illustrate: 1. a base; 11. a moving wheel; 12. a support arm; 13. a support cylinder; 14. a support head; 2. hoisting the platform; 21. a helical rack; 22. a rotating motor; 23. bevel gear; 24. a top plate; 25. a bottom plate; 26. a lifting column; 27. a lifting cylinder; 28. a weight box; 281. balancing weight; 3. a trailing arm; 4. a cross arm; 41. a hoisting motor; 42. a reel; 43. a rope; 44. a pulley; 45. a lifting hook; 46. a fixing rope; 5. a hanging bracket; 51. a fixed rod; 511. a clamping joint; 5111. a buffer layer I; 512. the clamping cylinder; 52. a support rod; 521. a limiting plate; 5211. a buffer layer II; 522. a limit cylinder; 100. prefabricating wallboard.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a hoisting device for assembled building.

Referring to fig. 1 and 2, a lifting device for an assembled building comprises a base 1, wherein a lifting platform 2 is rotationally connected to the base 1, a vertical arm 3 is fixedly connected to the lifting platform 2, and the base 1 and the lifting platform 2 can enable the vertical arm 3 to keep a vertical state. One end of the longitudinal arm 3, which is far away from the hoisting platform 2, is fixedly connected with a horizontal arm 4 which is horizontally arranged, and the longitudinal arm 3 fixes the horizontal arm 4 on a certain height, so that a height foundation is provided for hoisting. The upper surface of the cross arm 4 is fixedly connected with a lifting motor 41, an output shaft of the lifting motor 41 is fixedly connected with a reel 42, and the lifting motor 41 can drive the reel 42 to rotate forward or backward. The connecting part of the cross arm 4 and the longitudinal arm 3 is positioned at one end of the cross arm 4, one end of the cross arm 4 far away from the longitudinal arm 3 is rotationally connected with a pulley 44, and the rotating shaft of the pulley 44 is horizontally arranged and is vertical to the length direction of the cross arm 4. The pulley 44 is slidably connected with a rope 43, one end of the rope 43 is fixedly connected with the reel 42, and the other end of the rope naturally sags and is fixedly connected with a lifting hook 45. Rotation of the reel 42 may increase or decrease the length of the rope 43 wrapped around the reel 42 to effect up and down movement of the hook 45. The hanging hooks 45 are connected with hanging frames 5 through four fixing ropes 46, and the hanging frames 5 are used for rapidly fixing the prefabricated wall panels 100, so that hanging work of the prefabricated wall panels 100 is achieved.

Referring to fig. 1 and 2, the hanger 5 includes a support bar 52 and two fixing bars 51, the two fixing bars 51 are parallel to each other and are fixedly connected to the support bar 52, the fixing bars 51 are perpendicular to the support bar 52, and the support bar 52 is located above the fixing bars 51. The two ends of the fixed rod 51 are both connected with clamping connectors 511 in a sliding manner, and the clamping connectors 511 are U-shaped and are provided with openings towards the support rods 52. The sliding direction of the locking tab 511 is parallel to the longitudinal direction of the fixing lever 51. When in hoisting, the prefabricated wall plate 100 is arranged below the fixed rod 51, and the prefabricated wall plate 100 is embedded into the clamping connector 511 by the sliding clamping connector 511, so that the prefabricated wall plate 100 can be fixed.

Referring to fig. 1 and 2, both ends of the fixing rod 51 are fixedly connected with a clamping cylinder 512, the clamping cylinder 512 is parallel to the fixing rod 51, and a telescopic shaft of the clamping cylinder 512 is fixedly connected with the clamping connector 511. The sliding of the clamping head 511 can be driven by the expansion and contraction of the telescopic shaft of the clamping cylinder 512. The prefabricated wallboard 100 is convenient to hoist, labor is saved, and hoisting efficiency is improved.

Referring to fig. 1 and 2, both ends of the support bar 52 are slidably connected with L-shaped limiting plates 521, and a sliding direction of the limiting plates 521 is parallel to a length direction of the support bar 52. During hoisting, the sliding limiting plate 521 makes the limiting plate 521 abut against the prefabricated wall panel 100, so as to limit the displacement of the prefabricated wall panel 100 in the length direction of the supporting rod 52. The prefabricated wall panel 100 is more stably fixed on the hanging frame 5, so that the stability of the hanging process is improved, and the safety of workers is also ensured. Both ends of the supporting rod 52 are fixedly connected with limiting cylinders 522, the limiting cylinders 522 are parallel to the supporting rod 52, and telescopic shafts of the limiting cylinders 522 are fixedly connected with limiting plates 521. The sliding displacement of the limiting plate 521 can be driven by the expansion and contraction of the telescopic shaft of the limiting cylinder 522.

Referring to fig. 1 and 2, a first buffer layer 5111 is uniformly applied to a surface of the clip 511 contacting the prefabricated wall panel 100, and a second buffer layer 5211 is uniformly applied to a surface of the limiting plate 521 contacting the prefabricated wall panel 100. The prefabricated wallboard 100 is generally formed by pouring concrete, has a hard texture and is fragile when impacted, and the buffer layer I5111 and the buffer layer II 5211 are made of soft rubber, so that a good buffer effect can be provided for the prefabricated wallboard 100, the prefabricated wallboard 100 is protected to a certain extent, and the damage of the prefabricated wallboard in the hoisting process is reduced.

Referring to fig. 1 and 2, the lifting platform 2 includes a top plate 24 and a bottom plate 25, the bottom plate 25 is rotatably connected to the base 1, an annular diagonal rack 21 is disposed along the circumference of the bottom plate 25, the diagonal rack 21 is connected end to end, and the diagonal rack 21 is fixedly connected with the bottom plate 25. The base 1 is fixedly connected with a rotating motor 22, an output shaft of the rotating motor 22 is horizontally arranged and is coaxially and fixedly connected with a bevel gear 23, and the bevel gear 23 is meshed with the bevel rack 21. Generally, the prefabricated wall panel 100 has a large mass and a large volume, and in order to be able to hoist the prefabricated wall panel 100, the hoisting platform 2 and the structure connected thereto have a large mass. If the hoisting platform 2 is rotated manually, a great deal of manpower is consumed, and the hoisting efficiency is limited to a certain extent. The rotation of the hoisting platform 2 is driven and controlled by the rotation motor 22, and the machine replaces manpower, so that not only is the manpower saved, but also the hoisting efficiency is improved.

Referring to fig. 1 and 2, four vertically arranged jack posts 26 are fixedly connected to a bottom plate 25, and a top plate 24 is slidably connected to each jack post 26 in a vertical direction. Two lifting cylinders 27 which are vertically arranged are fixedly connected to the bottom plate 25, and one end, far away from the bottom plate 25, of a telescopic shaft of each lifting cylinder 27 is fixedly connected with the top plate 24. The trailing arm 3 is fixedly attached to the upper surface of the top plate 24. The lifting of the top plate 24 and thus the lifting of the trailing arm 3 can be driven by the telescopic movement of the telescopic shaft of the lifting cylinder 27. The ground clearance of the longitudinal arm 3 and the transverse arm 4 can be adjusted according to different use requirements, so that more use scenes can be met.

Referring to fig. 1 and 2, a weight box 28 is fixedly connected to one side of the top plate 24 far away from the cross arm 4, a plurality of balancing weights 281 for balancing the lifting device are arranged in the weight box 28, and the number of the balancing weights 281 can be adjusted according to different use requirements, so that the balance of the whole lifting device can be conveniently adjusted. Meanwhile, objects with larger mass can be hoisted, and the maximum hoisting mass of the hoisting device is increased.

Referring to fig. 1 and 2, a moving wheel 11 is arranged at the bottom end of the base 1, so that the lifting device can move flexibly. Four support arms 12 are connected with the horizontal rotation of base 1 side, and support cylinder 13 of vertical setting is connected with to support arm 12 one end of keeping away from base 1 fixedly, and support cylinder 13 telescopic shaft sets up and fixedly connected with supporting head 14 downwards. When the hoisting work is not performed, the telescopic shaft of the supporting cylinder 13 is in a completely contracted state, the supporting head 14 is higher than the bottom end of the movable wheel 11 in the vertical direction, the supporting head 14 leaves the ground, and the movable wheel 11 is in contact with the ground. And the supporting arm 12 can rotate to the position closest to the base 1, so that the space occupied by the whole hoisting device is reduced, and the hoisting device is convenient to move. When the lifting operation is carried out, each supporting arm 12 is rotated, so that each supporting cylinder 13 horizontally moves, and the supporting cylinder 13 is far away from the base 1. The supporting cylinder 13 is started, the telescopic shaft of the supporting cylinder 13 drives the supporting head 14 to move downwards, the supporting head 14 is abutted with the ground and lifts the base 1, and the moving wheel 11 is separated from the ground. The balance moment of the hoisting device is increased, and the stability of the hoisting device is improved.

The implementation principle of the lifting device for the assembled building is as follows: the hoisting platform 2 is used for fixing the trailing arm 3 and controlling the rotation and lifting of the trailing arm 3. The top end of the longitudinal arm 3 is fixedly connected with the cross arm 4, so that the cross arm 4 is fixed at a high position and can rotate or adjust the height along with the longitudinal arm 3. The telescopic shaft of the lifting motor 41 on the cross arm 4 drives the reel 42 to rotate forwards or reversely, and the reel 42 rotates in different directions to control the sliding direction of the rope 43 along the pulley 44, so as to control the lifting of the lifting hook 45. The hanging frame 5 is abutted with the prefabricated wall plate 100, the telescopic shaft of the clamping cylinder 512 is contracted to drive the clamping connector 511 to approach the prefabricated wall plate 100, and the edge of the prefabricated wall plate 100 is embedded into the clamping connector 511 and is tightly pressed, so that the prefabricated wall plate 100 is quickly fixed on the hanging frame 5. The lifting hook 45 is connected with the lifting frame 5 through the fixing rope 46, and lifting of the lifting hook 45 drives lifting of the lifting frame 5 and the prefabricated wall panel 100, so that quick lifting of the prefabricated wall panel 100 is realized. The prefabricated wallboard 100 is convenient to hoist, labor is saved, and hoisting efficiency is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a hoisting device for assembled building, includes base (1), its characterized in that: the lifting platform (2) is arranged on the base (1), the vertical longitudinal arm (3) is fixedly connected to the lifting platform (2), one end of the longitudinal arm (3) is far away from the lifting platform (2) and fixedly connected with the horizontal cross arm (4), the lifting motor (41) is fixedly connected to the cross arm (4), the output shaft of the lifting motor (41) is horizontally arranged and is fixedly connected with the winch wheel (42) coaxially, the winch wheel (42) is fixedly connected with the rope (43), one end of the cross arm (4) is far away from the longitudinal arm (3) and is rotationally connected with the pulley (44), the rope (43) is in sliding connection with the pulley (44) and one end of the rope (43) is far away from the winch wheel (42) and is fixedly connected with the lifting hook (45), the lifting hook (45) is connected with a plurality of fixing ropes (46), one end of the fixing ropes (46) is far away from the lifting hook (45) and is connected with the lifting frame (5), the lifting frame (5) comprises the supporting rod (52) and two fixing rods (51), the fixing rods (51) are perpendicular to the supporting rod (52) and are fixedly connected with the winch wheel (42), two ends of the fixing rods (51) are fixedly connected with the U-shaped clamping joints (511) for fixing the wallboard (100), the clamping cylinder (512) is parallel to the fixed rod (51) and the telescopic shaft of the clamping cylinder (512) is fixedly connected with the clamping connector (511).

2. A fabricated building hoist device according to claim 1, characterized in that: both ends of the supporting rod (52) are both connected with limiting plates (521) in an L shape for fixing the prefabricated wallboard (100) in a sliding manner, both ends of the supporting rod (52) are both connected with limiting cylinders (522) in a fixed manner, the limiting cylinders (522) are parallel to the supporting rod (52) and telescopic shafts of the limiting cylinders (522) are fixedly connected with the limiting plates (521).

3. A fabricated building hoist device according to claim 2, characterized in that: the buffer layer I (5111) is uniformly laid on the surface of the side, which is contacted with the prefabricated wallboard (100), of the clamping connector (511), and the buffer layer II (5211) is uniformly laid on the surface of the side, which is contacted with the prefabricated wallboard (100), of the limiting plate (521).

4. A fabricated building hoist device according to claim 1, characterized in that: the hoisting platform (2) is rotationally connected to the base (1) and the rotating shaft is vertically arranged.

5. The hoisting device for a fabricated building according to claim 4, wherein: the lifting platform (2) is fixedly connected with an annular helical rack (21) along the circumferential direction, the base (1) is fixedly connected with a rotating motor (22), an output shaft of the rotating motor (22) is horizontally arranged and is coaxially and fixedly connected with a helical gear (23), and the helical gear (23) is meshed with the helical rack (21).

6. A fabricated building hoist device according to claim 5, characterized in that: hoist and mount platform (2) are including roof (24) and bottom plate (25), bottom plate (25) rotate with base (1) to be connected and with rack (21) fixed connection, roof (24) and trailing arm (3) fixed connection, fixedly connected with a plurality of vertical jack-up posts (26) of setting on bottom plate (25), roof (24) sliding connection is on jack-up post (26), fixedly connected with a plurality of vertical jack-up cylinders (27) of setting on bottom plate (25), jack-up cylinder (27) telescopic shaft keep away from bottom plate (25) one end and roof (24) fixed connection.

7. The assembled building hoisting device according to claim 6, wherein: one side of the top plate (24) far away from the cross arm (4) is fixedly connected with a weight box (28), and a plurality of balancing weights (281) are arranged in the weight box (28).

8. A fabricated building hoist device according to claim 1, characterized in that: the base (1) bottom is equipped with removes round (11), and base side level rotation is connected with a plurality of support arms (12), and support cylinder (13) of base one end fixedly connected with vertical setting are kept away from to support arm (12), and support cylinder (13) telescopic shaft set up and fixedly connected with support head (14) down, and when support cylinder (13) telescopic shaft was in complete shrink state, support head (14) were higher than in vertical direction and remove round (11) bottom.