CN217102740U

CN217102740U - Lifting type supporting leg structure of small portal crane

Info

Publication number: CN217102740U
Application number: CN202220460630.7U
Authority: CN
Inventors: 胡景蓉
Original assignee: Hubei Three Gorges Polytechnic
Current assignee: Hubei Three Gorges Polytechnic
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-08-02
Anticipated expiration: 2032-03-04

Abstract

The utility model provides a lifting type landing leg structure of a small portal crane, which comprises a movable base, wherein a landing leg upright post is fixed at the top of the movable base; a nut seat is fixed at the top of the support leg upright post, and a lifting screw is matched in the nut seat in a threaded transmission manner; a fixed seat is supported and installed at the upper part of the lifting screw rod, a rectangular sleeve is fixed at the bottom end of the fixed seat, and the rectangular sleeve is integrally sleeved outside the lifting screw rod; a top rectangular tube is fixed at the top end of the fixed seat; a lifting adjusting mechanism for driving the lifting screw rod to rotate is arranged in the top rectangular tube; the top of the top rectangular tube is fixed with a top plate. Through adopting foretell this over-and-under type bearing structure, can be used for supporting portal crane's girder, the regulation of realization height that moreover can be convenient.

Description

Lifting type supporting leg structure of small portal crane

Technical Field

The utility model belongs to the hoisting equipment field especially relates to small-size gantry crane's over-and-under type landing leg structure.

Background

The supporting leg of current small-size gantry crane mainly adopts the fixed height that section bar material made, and it is in concrete use, and the height of supporting leg is fixed unchangeable all the time, adopts above-mentioned structure in concrete use, when meetting the obstacle of a take the altitude on its migration path, can cause certain the blockking to the hoist portal, consequently, the height that need guarantee the supporting leg can be adjusted.

Although CN 104016242 a discloses a foldable and liftable mobile small portal crane, which can also realize the lifting adjustment function, the lifting adjustment is specifically in the form of a telescopic sleeve structure, and during the adjustment, the relative height between the sleeves is changed, and then locking is performed through a bolt. The height adjusting mechanism is inconvenient to use and time-consuming and labor-consuming to operate;

CN 210795569U discloses a lightweight portal crane capable of adjusting the height of a girder, and a lifting adjustment structure adopted by the crane is a hydraulic cylinder as a lifting drive device. By adopting the lifting structure, a hydraulic system and a corresponding control system need to be additionally arranged, and inconvenience exists when the lifting structure is used on site.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a lifting support leg structure of a small portal crane, which is used for supporting a main beam of the portal crane and can conveniently realize the height adjustment so as to change the support height of the main beam; the height adjusting mechanism adopts a mechanical adjusting mode and is directly integrated inside the supporting leg, so that the height adjusting structure is simplified, and the height adjusting process is facilitated.

In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the lifting type supporting leg structure of the small portal crane comprises a movable base, wherein a supporting leg upright post is fixed at the top of the movable base; a nut seat is fixed at the top of the support leg upright post, and a lifting screw is matched in the nut seat in a threaded transmission manner; a fixed seat is supported and installed at the upper part of the lifting screw rod, a rectangular sleeve is fixed at the bottom end of the fixed seat, and the rectangular sleeve is integrally sleeved outside the lifting screw rod; a top rectangular tube is fixed at the top end of the fixed seat; a lifting adjusting mechanism for driving the lifting screw rod to rotate is arranged in the top rectangular tube; the top of the top rectangular tube is fixed with a top plate.

Track wheels are rotatably supported on two sides of the bottom end of the movable base; the rail wheels are matched with channel steel rails laid on the installation foundation.

The nut seat is fixed on the top end of the supporting leg upright post through the nut clamping seat.

The fixing seat is limited and supported on a supporting step of the lifting screw rod through a plane bearing.

The outer part of the supporting leg upright post is fixed with a rectangular guide block, and the rectangular guide block and the inner cavity of the rectangular sleeve form sliding guide fit.

The lifting adjusting mechanism comprises a main shaft seat fixed on the opposite outer side wall of the rectangular pipe at the top; the main shaft seat is rotatably provided with a main shaft through a bearing, the main shaft is provided with a driving bevel gear, the driving bevel gear is in meshing transmission with a driven bevel gear, and the driven bevel gear is fixedly arranged at the top end of the lifting screw.

And bolt holes for fixing the crane beam are processed at four corners of the top plate.

And a square column matched with the socket wrench is processed at the extending end of the main shaft.

The driving bevel gear is positioned and installed on the main shaft through a positioning sleeve.

The utility model discloses there is following beneficial effect:

1. the lifting support structure is used for supporting a main beam of the portal crane, and can conveniently realize height adjustment so as to change the support height of the main beam; the height adjusting mechanism adopts a mechanical adjusting mode and is directly integrated inside the supporting leg, so that the height adjusting structure is simplified, and the height adjusting process is facilitated.

2. Through foretell plane bearing locate mode, guaranteed that the lifting screw can bear the axial force to guaranteed its rotation that can be smooth, and then realized subsequent lift action.

3. The rectangular guide block can be used for guiding the lifting process of the rectangular sleeve, and smooth lifting under the jacking action of the lifting screw rod is guaranteed.

4. The lifting adjusting mechanism can be used for providing lifting power.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a first perspective three-dimensional view of the present invention.

Fig. 2 is a second perspective three-dimensional view of the present invention.

Fig. 3 is a third perspective three-dimensional view of the present invention.

Fig. 4 is a rear view of the present invention.

Fig. 5 is a front view of the present invention.

Fig. 6 is a view from a-a in fig. 5 according to the present invention.

Fig. 7 is a side view of the present invention.

Fig. 8 is a view from B-B in fig. 7 according to the present invention.

Fig. 9 is a three-dimensional view of the present invention with the rectangular sleeve removed.

In the figure: the device comprises a top plate 1, a top rectangular pipe 2, a fixed seat 3, a rectangular sleeve 4, a support leg upright post 5, a movable base 6, a track wheel 7, a bolt hole 8, a square post 9, a main shaft 10, a main shaft seat 11, a driving bevel gear 12, a bearing 13, a driven bevel gear 14, a plane bearing 15, a supporting step 16, a lifting screw 17, a nut seat 18, a nut clamping seat 19, a rectangular guide block 20 and a positioning sleeve 21.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

Referring to fig. 1-9, the lifting support leg structure of the small portal crane comprises a movable base 6, wherein a support leg upright post 5 is fixed at the top of the movable base 6; a nut seat 18 is fixed at the top of the leg upright post 5, and a lifting screw 17 is matched with the interior of the nut seat 18 in a threaded transmission manner; the upper part of the lifting screw 17 is supported and provided with a fixed seat 3, the bottom end of the fixed seat 3 is fixed with a rectangular sleeve 4, and the rectangular sleeve 4 is integrally sleeved outside the lifting screw 17; a top rectangular tube 2 is fixed at the top end of the fixed seat 3; a lifting adjusting mechanism for driving the lifting screw 17 to rotate is arranged in the top rectangular tube 2; the top end of the top rectangular tube 2 is fixed with a top plate 1. By adopting the lifting support structure, the main beam of the portal crane can be supported, and the height can be conveniently adjusted, so that the support height of the main beam can be changed; the height adjusting mechanism adopts a mechanical adjusting mode and is directly integrated inside the supporting leg, so that the height adjusting structure is simplified, and the height adjusting process is facilitated. In the specific use process, the lifting screw 17 is driven by the lifting adjusting mechanism, and the lifting of the fixed seat 3 is realized through the matching between the lifting screw 17 and the nut seat 18, so that the purpose of adjusting the height of the top plate 1 is finally achieved.

Further, two sides of the bottom end of the movable base 6 are rotatably supported with track wheels 7; the rail wheels 7 are matched with channel steel rails laid on the installation foundation. Through foretell cooperation, guaranteed to remove base 6 and can remove along the channel-section steel track, and then realized gantry crane's removal walking.

Further, the nut seat 18 is fixed on the top end of the leg upright post 5 through a nut clamping seat 19. By the above-mentioned fixed mounting manner, reliable support and mounting of the nut seat 18 are ensured.

Further, the fixed seat 3 is limited and supported on a supporting step 16 of the lifting screw 17 through a plane bearing 15. Through the above-mentioned plane bearing 15 positioning mode, it is guaranteed that the lifting screw 17 can bear the axial force, and it is guaranteed that it can smoothly rotate, and then the subsequent lifting action is realized.

Furthermore, a rectangular guide block 20 is fixed outside the leg upright 5, and the rectangular guide block 20 and the inner cavity of the rectangular sleeve 4 form sliding guide fit. The rectangular guide block 20 can be used for guiding the lifting process of the rectangular sleeve 4, and the smooth lifting of the rectangular sleeve under the jacking action of the lifting screw 17 is ensured.

Further, the lifting adjusting mechanism comprises a spindle seat 11 fixed on the opposite outer side wall of the top rectangular tube 2; a main shaft 10 is rotatably arranged on a main shaft seat 11 through a bearing 13, a driving bevel gear 12 is arranged on the main shaft 10, the driving bevel gear 12 is in meshing transmission with a driven bevel gear 14, and the driven bevel gear 14 is fixedly arranged at the top end of a lifting screw 17. The lifting adjusting mechanism can be used for providing lifting power. In the working process, the main shaft 10 is rotated to drive the driving bevel gear 12 through the main shaft 10, the driving bevel gear 12 drives the driven bevel gear 14, and the lifting screw 17 is driven to rotate through the driven bevel gear 14.

Furthermore, bolt holes 8 for fixing a crane beam are machined in four corners of the top plate 1. The structure can be used for stably supporting the cross beam of the crane.

Further, the overhanging end of the main shaft 10 is provided with a square column 9 for matching with a socket wrench. The square column 9 can be used for conveniently driving the main shaft 10 to rotate, and then the main shaft 10 drives the whole lifting adjusting mechanism.

Further, the drive bevel gear 12 is positioned and mounted on the main shaft 10 through a positioning sleeve 21. The positioning sleeve 21 can reliably position the driving bevel gear 12, prevent the driving bevel gear from moving on the main shaft 10 and ensure reliable meshing transmission between the driving bevel gear and the driven bevel gear 14.

The utility model discloses working process and principle:

when the height of whole gantry crane needs to be adjusted, square column 9 is rotated through the spanner, main shaft 10 is driven through square column 9, driving bevel gear 12 is driven through main shaft 10, driven bevel gear 14 is driven through driving bevel gear 12, lifting screw 17 is driven to rotate through driven bevel gear 14, whole fixing base 3 is driven to lift through the cooperation between lifting screw 17 and nut seat 18, and then top plate 1 at the top is driven to lift through fixing base 3, and finally, crane beam lifting is driven through top plate 1.

Claims

1. Small-size gantry crane's over-and-under type landing leg structure, its characterized in that: the device comprises a movable base (6), wherein a supporting leg upright post (5) is fixed at the top of the movable base (6); a nut seat (18) is fixed at the top of the supporting leg upright post (5), and a lifting screw (17) is matched with the interior of the nut seat (18) in a threaded transmission manner; the upper part of the lifting screw (17) is supported and provided with a fixed seat (3), the bottom end of the fixed seat (3) is fixed with a rectangular sleeve (4), and the rectangular sleeve (4) is integrally sleeved outside the lifting screw (17); a top rectangular pipe (2) is fixed at the top end of the fixed seat (3); a lifting adjusting mechanism for driving a lifting screw rod (17) to rotate is arranged in the top rectangular tube (2); the top end of the top rectangular tube (2) is fixed with a top plate (1).

2. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: track wheels (7) are rotatably supported on two sides of the bottom end of the movable base (6); the rail wheels (7) are matched with channel steel rails paved on an installation foundation.

3. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: the nut seat (18) is fixed at the top end of the supporting leg upright post (5) through a nut clamping seat (19).

4. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: the fixed seat (3) is limited and supported on a supporting step (16) of the lifting screw (17) through a plane bearing (15).

5. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: the outer part of the supporting leg upright post (5) is fixed with a rectangular guide block (20), and the rectangular guide block (20) and the inner cavity of the rectangular sleeve (4) form sliding guide fit.

6. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: the lifting adjusting mechanism comprises a spindle seat (11) fixed on the opposite outer side wall of the top rectangular pipe (2); a main shaft (10) is rotatably arranged on a main shaft seat (11) through a bearing (13), a driving bevel gear (12) is arranged on the main shaft (10), the driving bevel gear (12) is in meshing transmission with a driven bevel gear (14), and the driven bevel gear (14) is fixedly arranged at the top end of a lifting screw (17).

7. The elevating leg structure of a small-sized gantry crane according to claim 1, wherein: and bolt holes (8) for fixing a crane beam are machined at four corners of the top plate (1).

8. The elevating leg structure of a small-sized gantry crane according to claim 6, wherein: the outer extending end of the main shaft (10) is provided with a square column (9) matched with a socket wrench.

9. The elevating leg structure of a small-sized gantry crane according to claim 6, wherein: the driving bevel gear (12) is positioned and installed on the main shaft (10) through a positioning sleeve (21).