CN211078205U

CN211078205U - Telescopic lifting frame for narrow space

Info

Publication number: CN211078205U
Application number: CN201922212349.2U
Authority: CN
Inventors: 杨洋; 冯毅
Original assignee: China Metallurgical Construction Engineering Group Co Ltd
Current assignee: China Metallurgical Construction Engineering Group Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-07-24
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a telescopic lifting frame for narrow space, which comprises a crossbeam, wherein two telescopic supporting tubes are detachably arranged at the left end and the right end of the crossbeam, and the telescopic lifting frame is characterized in that the crossbeam can be a telescopic crossbeam and comprises a left crossbeam, a right crossbeam and a locking sleeve, the left crossbeam is sleeved in the right crossbeam, the left crossbeam can slide along the length direction of the right crossbeam, the locking sleeve is sleeved on the right crossbeam, and the right crossbeam can be fixed on the left crossbeam through rotating the locking sleeve; the telescopic supporting tube comprises an upper tube and a lower tube, the upper tube is sleeved in the lower tube, a rack is arranged on the upper tube, a gear meshed with the rack is arranged on the lower tube, and the upper tube can be driven to move up and down in the lower tube by rotating the gear; one side of the gear is also provided with a propping piece which tightly props the gear at the side end of the rack. The utility model discloses the telescopic gallows crossbeam that plays that is used for narrow space that obtains and support frame can both stretch out and draw back, and easy operation.

Description

Telescopic lifting frame for narrow space

Technical Field

The utility model relates to a lift by crane the apparatus, concretely relates to telescopic gallows that plays for narrow space.

Background

In piping lane construction or underground pipe network work progress, need install many pipelines in comparatively constrictive space usually, and conventional hoisting equipment is bulky, can't rise to hoist and mount the installation to equipment or pipeline of weight within 300kg, can only hoist equipment and pipeline through the mode of workman's lifting, and this kind of construction mode wastes time and energy, and is great to the time limit for a project influence.

In order to solve the problems, the Chinese intellectual property office announces in 2015, 7 and 1, and the announcement number is 204434085, wherein the simple telescopic lifting frame is mainly applied to narrow spaces and comprises cross beams and support frames, and the number of the support frames is 2, and the support frames are of telescopic structures; the crossbeam is detachably connected with the support frame, is provided with hoisting accessory at the crossbeam middle part, when specifically using, can set up electric block, chain block, pulley etc. according to the use needs. After the lifting frame is adopted, the required lifting equipment can be lifted by the aid of the lifting device arranged on the cross beam, and operation is convenient. The lifting frame only has the support frame capable of stretching, and the cross beam cannot stretch, so that certain application limitation is realized. Meanwhile, the telescopic structure of the supporting frame is troublesome to operate. Based on the above reasons, the applicant wants to design a crossbeam and support frame can both stretch out and draw back, and the telescopic operation comparatively simple telescopic plays the gallows.

Disclosure of Invention

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a crossbeam and support frame can both stretch out and draw back, and the telescopic operation comparatively simple a telescopic lifting frame that is used for narrow space.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a telescopic lifting frame for a narrow space comprises a cross beam, wherein two telescopic supporting tubes are detachably mounted at the left end and the right end of the cross beam; the telescopic supporting tube comprises an upper tube and a lower tube, the upper tube is sleeved in the lower tube, a rack is arranged on the upper tube, a gear meshed with the rack is arranged on the lower tube, and the upper tube can be driven to move up and down in the lower tube by rotating the gear; one side of the gear is also provided with a propping piece which tightly props the gear at the side end of the rack; a winch is fixedly installed in the middle of the lower pipe of each telescopic supporting pipe, a hanging pulley is respectively arranged at the left end and the right end of each cross beam, a plurality of circles of flexible inhaul cables are wound on a reel of the winch, one end of each flexible inhaul cable is fixed on the reel, the other end of each flexible inhaul cable is drooping after penetrating through the hanging pulley, and the flexible inhaul cables can be driven to move up and down by rotating the reel on the winch; the outer end of each flexible inhaul cable is provided with a lifting hook. Like this, telescopic stay tube comprises top pipe and lower side pipe, and the pipe fitting that square pipe is constituteed can not appear rotating at the slip in-process, and is more firm. And the upper pipe and the lower pipe move up and down in a manner of meshing the gear and the rack, the telescopic structure is convenient to adjust, and the adjustment precision is higher. And crossbeam right left crossbeam and right crossbeam are constituteed to through a locking sleeve locking, its flexible structure is also comparatively simple, when adjusting crossbeam length, adjusts the depth of insertion of left crossbeam earlier, and rethread locking sleeve is together fixed with left crossbeam and right crossbeam, and the regulation mode is simple and convenient, and can adjust the length in the millimeter. The gear can be tightly abutted to the side end of the rack by the abutting piece, so that the upper pipe and the lower pipe can be fixed together by the abutting piece after the height is adjusted in place, and the operation mode is also convenient. The pipeline hoisting assembly is composed of the winch, the hoisting pulley and the flexible inhaul cable, when the pipeline hoisting assembly is used, the flexible inhaul cable can be placed or lifted by rotating the reel of the winch, so that the fallen objects under the flexible inhaul cable can be lifted or lowered, and the operation mode is simple and labor-saving.

Furthermore, an external thread is arranged at the sleeving end of the right cross beam, and an internal thread matched with the external thread is arranged on the inner cylinder of the locking sleeve; the inner diameter of the right cross beam is larger than the outer diameter of the left cross beam, a plurality of strip-shaped deformation ports are further arranged at intervals at the sleeving end of the right cross beam along the axial direction of the right cross beam, an arc-shaped plate is formed between every two adjacent deformation ports, the arc-shaped plate at the sleeving end of the right cross beam is close to the outer wall of the left cross beam after being inwards extruded through the rotary locking sleeve and is tightly attached to the outer wall of the left cross beam, and the left cross beam is fixed on the right cross beam. Like this, through set up the strip mouth that warp on right crossbeam for each arc can be the shrink form after being extrudeed, and the diameter diminishes, thereby holds the left crossbeam tightly, realizes the fixed of left crossbeam and right crossbeam. The structure is stable and convenient to operate.

Furthermore, the thickness of the arc-shaped plate is gradually increased from outside to inside, and the left side and the right side of each arc-shaped plate are inclined planes which are inclined towards the middle direction of the arc-shaped plate. Like this, receive the extrusion back at the arc, have better shrink nature, simultaneously, the side also can not cause the hindrance.

Furthermore, a mounting box is detachably mounted on the lower pipe, a rotating shaft is arranged in the mounting box, one end of the rotating shaft is fixed on one surface of the mounting box, and the other end of the rotating shaft extends out of the mounting box; the gear is sleeved on the rotating shaft in the mounting box, and one side of the gear meshed with the rack extends out of the mounting box. Therefore, after the installation box is arranged, the gear can be conveniently installed, and the gear is protected to prevent dust from entering.

Furthermore, a handle is connected to the outer end of the rotating shaft, and a bearing is sleeved at the fixed end of the rotating shaft and embedded in the side wall of the mounting box. Like this, after setting up the handle, can be convenient for rotate the pivot to drive gear is rotatory, and the bearing that sets up on the mounting box can be convenient for the pivot rotatory, reduces the rotatory produced resistance of pivot.

Furthermore, a through hole is formed in the mounting box and on the opposite side of the gear meshing end, the inner end of the abutting piece penetrates through the through hole and then is arranged in the mounting box in a transverse mode, the abutting piece is pushed inwards to be fixed on the mounting box, the inner end of the abutting piece abuts against the side end of the gear, and the gear is fixed at the current position. Like this, the piece of propping is horizontal setting, can be convenient for promote, and the inner end easily offsets with the gear.

Furthermore, the diameter of the abutting piece is gradually increased from the inner end to the outer end, a plurality of elastic blocking pieces are arranged in the middle of the through hole at intervals, and the elastic blocking pieces divide the through hole into an inner hole and an outer hole which are communicated with each other; a return spring is arranged in the inner hole, the return spring is sleeved on the abutting piece, and the inner end of the return spring is fixed on the side wall of the inner hole; pressing the abutting piece inwards until the outer end of the abutting piece extrudes the elastic blocking piece and is placed in the inner hole, and then tightly attaching the inner end of the abutting piece to the side end of the gear to fix the gear at the current position; after the outer end of the abutting part is pressed again, the outer end of the abutting part extrudes the elastic separation blade outwards under the jacking action of the reset spring and extends out of the mounting box, and a gap is formed between the inner end and the side end of the gear. Like this, establish into the reducing pattern through the diameter that will support the piece after, can ensure that whole support the piece and be convenient for promote, simultaneously, the outer end diameter that supports the piece is great, thereby be convenient for and the cooperation of elastic separation blade, it is outer along less with the interval between the elastic separation blade, it makes elastic separation blade can warp under less thrust behind the elastic separation blade bulldozing more easily, and then after elastic separation blade warp, make the diameter increase of the middle part space that the elastic separation blade surrounds and form, and when not promoting, resume original state. The reset spring is compressed in the process of pushing the abutting piece inwards, and after the abutting piece is pressed again, the reset spring continuously receives extrusion force and generates larger deformation, so that when the pressing is finished, outward rebound thrust is generated, the abutting piece is further pushed to move outwards, the elastic separation blade is extruded to open outwards in the moving process, the diameter is increased after the deformation is generated, and the gear is not clamped with the gear any more after the abutting piece moves outwards, so that the gear is unlocked.

Further, the abutting piece is located on the same axis with the center of the gear. Therefore, the clamping or gear releasing device can effectively ensure that the clamping part moves the minimum distance to clamp or release the gear clamping, and can not block the rotation of the gear when the clamping state is released.

Furthermore, a chassis is arranged at the bottom of the lower pipe of each telescopic supporting pipe, and a plurality of inclined struts which are fixed with the outer wall of the lower pipe through welding are arranged on the chassis. In this way, the telescopic support tube can stand well on the ground through the chassis.

Drawings

FIG. 1 is a schematic view showing an assembling structure of a telescopic lifting frame in the embodiment;

FIG. 2 is an enlarged view of the mounting structure of the gear, the mounting box and the abutting member in the embodiment;

FIG. 3 is an enlarged schematic view of the fixed end of the right cross member in the embodiment.

In the figure: the device comprises a cross beam 1, a left cross beam 11, a right cross beam 12, a strip-shaped deformation opening 13, a locking sleeve 14, a telescopic supporting tube 2, an upper square tube 21, a rack 22, a lower square tube 23, a mounting box 24, a through hole 241, a bearing 25, a rotating shaft 26, a gear 27, a handle 28, an elastic blocking piece 29, a butting piece 3, a return spring 31, a chassis 4, a winch 5, a fixed pulley 6, a hanging pulley 7, a flexible inhaul cable 8 and a lifting hook 9.

Detailed Description

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

Example (b):

the telescopic lifting frame for the narrow space provided by the embodiment comprises a cross beam 1, wherein two telescopic supporting tubes 2 are detachably arranged at the left end and the right end of the cross beam 1; the beam 1 is a telescopic beam and comprises a left beam 11, a right beam 12 and a locking sleeve 14, the left beam 11 is sleeved in the right beam 12, the left beam 11 can slide along the length direction of the right beam 12, the locking sleeve 14 is sleeved on the right beam 12, and the right beam can be fixed on the left beam through rotating the locking sleeve; the telescopic supporting tube 2 comprises an upper tube 21 and a lower tube 23, the upper tube 21 is sleeved in the lower tube 23, a rack 22 is arranged on the upper tube 21, a gear 27 meshed with the rack 22 is arranged on the lower tube 23, and the upper tube 21 can be driven to move up and down in the lower tube 23 by rotating the gear 27; a propping piece 3 for propping the gear 27 tightly against the side end of the rack 22 is arranged on one side of the gear 27; a winch 5 is fixedly arranged in the middle of the lower pipe 23 of each telescopic supporting pipe 2, a hanging pulley 7 is arranged at each of the left end and the right end of the cross beam, a plurality of circles of flexible inhaul cables 8 are wound on a reel of the winch 5, one end of each flexible inhaul cable 8 is fixed on the reel, the other end of each flexible inhaul cable 8 passes through the hanging pulley 7 and then sags, and the flexible inhaul cables 8 can be driven to move up and down by rotating the reel on the winch 5; the outer end of each flexible inhaul cable 8 is provided with a hook 9.

Above-mentioned crossbeam 1 is detachable to be connected between the telescopic stay tube, and is specific, all is fixed with a connection side pipe under the left crossbeam 11 of crossbeam 1 and the 12 outer ends of right crossbeam, connection side pipe overlaps the upper end at upper square pipe 21 through the mode of pegging graft.

During installation, the rack 22 is arranged along the length direction of the upper pipe 21, the lower end of the rack is flush with the lower end of the upper pipe, the upper end of the rack is arranged in the middle of the upper pipe or close to the top of the upper pipe or flush with the top of the upper pipe, and the rack is installed on the upper pipe 21 through welding or a fastener.

As shown in fig. 1, in order to facilitate the stability of the telescopic support tubes 2, a chassis 4 is disposed at the bottom of the lower tube 23 of each telescopic support tube 2, and a plurality of diagonal braces whose ends are fixed to the outer wall of the lower tube by welding are disposed on the chassis 4. In addition, in order to reduce the gravity borne by the hanging pulley 7 and facilitate the pulling of the flexible inhaul cable 8, at least one fixed pulley 6 is arranged on the lower pipe 23 and the upper pipe 21 at intervals, a rotating shaft is arranged in the middle of the fixed pulley 6, two ends of the rotating shaft are arranged on a support lug, and the support lug is fixed on the lower pipe 23 or the upper pipe 21. During assembly, the flexible inhaul cable 8 sequentially penetrates through the fixed pulley 6 and the hanging pulley 7 from bottom to top and then sags.

As shown in fig. 1 and 3, an external thread is provided on the sleeve end of the right beam 12, and an internal thread matched with the external thread is provided on the inner wall of the locking sleeve 14; the inner diameter of the right cross beam 12 is larger than the outer diameter of the left cross beam 11, a plurality of strip-shaped deformation openings 13 are further arranged at intervals at the sleeving end of the right cross beam 12 along the axial direction of the right cross beam, an arc-shaped plate is formed between every two adjacent deformation openings 13, the arc-shaped plate at the sleeving end of the right cross beam is extruded inwards to be close to the outer wall of the left cross beam 11 through the rotary locking sleeve 14 and is tightly attached to the outer wall of the left cross beam 11, and the left cross beam 11 is fixed on the right cross beam 12. The thickness of the arc-shaped plates (not marked in the figure) is gradually increased from outside to inside, and the left side and the right side of each arc-shaped plate are inclined planes which are inclined towards the middle direction of the arc-shaped plate.

As shown in fig. 1 and 2, a mounting box 24 is detachably mounted on the lower tube 23, a rotating shaft 26 is disposed in the mounting box 24, one end of the rotating shaft 26 is fixed to one surface of the mounting box 24, and the other end of the rotating shaft extends out of the mounting box 24; the gear 27 is sleeved on the rotating shaft 26 in the mounting box, and one side of the gear 27 meshed with the rack 22 extends out of the mounting box 24.

Further, in order to facilitate the rotation of the gear 27, a handle 28 is connected to the outer end of the rotating shaft 26, and a bearing 25 is sleeved on the fixed end of the rotating shaft 26, wherein the bearing 25 is embedded in the side wall of the mounting box 24.

A through hole 241 is arranged on the mounting box 24 at the opposite side of the gear meshing end, the inner end of the abutting piece 3 is arranged in the mounting box 24 after passing through the through hole, and is transversely arranged, and the centers of the abutting piece 3 and the gear 27 are positioned on the same axis. By pushing the abutting member 3 inward, the abutting member 3 can be fixed on the mounting box 24, and the inner end abuts against the side end of the gear 27, so that the gear 27 is fixed at the current position.

As shown in fig. 2, the diameter of the fastening member 3 gradually increases from the inner end to the outer end, a plurality of elastic blocking pieces 29 are arranged at intervals in the middle of the through hole 241, and the elastic blocking pieces 29 divide the through hole into an inner hole and an outer hole which are communicated with each other; a return spring 31 is arranged in the inner hole, the return spring 31 is sleeved on the abutting piece 3, and the inner end of the return spring 31 is fixed on the side wall of the inner hole; the gear 27 is fixed at the current position by pressing the abutting piece 3 inwards until the outer end of the abutting piece 3 extrudes the elastic catch 29 and placing the elastic catch 29 in the inner hole, and the inner end of the abutting piece 3 is tightly attached to the side end of the gear 27; after the outer end of the abutting member 3 is pressed again, the outer end of the abutting member 3 extrudes the elastic blocking piece 29 outwards under the jacking action of the return spring 31 and extends out of the mounting box 24, and a gap is formed between the inner end and the side end of the gear.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.

Claims

1. A telescopic lifting frame for a narrow space comprises a cross beam (1), wherein two telescopic supporting tubes (2) are detachably mounted at the left end and the right end of the cross beam (1), and is characterized in that the cross beam (1) is a telescopic cross beam and comprises a left cross beam (11), a right cross beam (12) and a locking sleeve (14), the left cross beam (11) is sleeved in the right cross beam (12), the left cross beam (11) can slide along the length direction of the right cross beam (12), the locking sleeve (14) is sleeved on the right cross beam (12), and the right cross beam can be fixed on the left cross beam through rotating the locking sleeve; the telescopic supporting tube (2) comprises an upper tube (21) and a lower tube (23), the upper tube (21) is sleeved in the lower tube (23), a rack (22) is arranged on the upper tube (21), a gear (27) meshed with the rack (22) is arranged on the lower tube (23), and the upper tube (21) can be driven to move up and down in the lower tube (23) by rotating the gear (27); one side of the gear (27) is also provided with a propping piece (3) which props the gear (27) against the side end of the rack (22); a winch (5) is fixedly installed in the middle of the lower pipe (23) of each telescopic supporting pipe (2), a hanging pulley (7) is arranged at each of the left end and the right end of the cross beam, a plurality of circles of flexible inhaul cables (8) are wound on a reel of the winch (5), one end of each flexible inhaul cable (8) is fixed on the reel, the other end of each flexible inhaul cable (8) penetrates through the hanging pulley (7) and then sags, and the flexible inhaul cables (8) can be driven to move up and down by rotating the reel on the winch (5); the outer end of each flexible inhaul cable (8) is provided with a lifting hook (9).

2. The telescopic lifting frame for narrow spaces as claimed in claim 1, wherein the right cross member (12) is provided with an external thread at the coupling end thereof, and the locking sleeve (14) is provided with an internal thread on the inner wall thereof for engagement with the external thread; the inner diameter of the right cross beam (12) is larger than the outer diameter of the left cross beam (11), a plurality of strip-shaped deformation ports (13) are further arranged at intervals at the sleeving end of the right cross beam (12) along the axial direction of the right cross beam, an arc-shaped plate is formed between every two adjacent deformation ports (13), through the rotary locking sleeve (14), the arc-shaped plate at the sleeving end of the right cross beam is inwards extruded to be close to the outer wall of the left cross beam (11) and is tightly attached to the outer wall of the left cross beam (11), and the left cross beam (11) is fixed on the right cross beam (12).

3. The telescopic lifting frame for a narrow space as claimed in claim 2, wherein the thickness of the arc-shaped plate is gradually increased from outside to inside, and the left and right sides of each arc-shaped plate are inclined planes inclined toward the middle of the arc-shaped plate.

4. The telescopic lifting frame for narrow spaces as claimed in claim 1, wherein a mounting box (24) is further detachably mounted on the lower pipe (23), a rotating shaft (26) is provided in the mounting box (24), one end of the rotating shaft (26) is fixed to one surface of the mounting box (24), and the other end of the rotating shaft extends out of the mounting box (24); the gear (27) is sleeved on the rotating shaft (26) in the mounting box, and one side, meshed with the rack (22), of the gear (27) extends out of the mounting box (24).

5. Telescopic lifting frame for narrow spaces according to claim 4, characterised in that a handle (28) is attached to the outer end of the shaft (26), and that a bearing (25) is fitted around the fixed end of the shaft (26), said bearing (25) being embedded in the side wall of the mounting box (24).

6. The telescopic lifting frame for narrow spaces as claimed in claim 4, wherein a through hole (241) is formed in the mounting case (24) at the opposite side of the gear engagement end, the inner end of said abutment member (3) is inserted into the mounting case (24) and is transversely disposed, and the abutment member (3) is fixed to the mounting case (24) by pushing the abutment member (3) inward, and the inner end abuts against the side end of the gear (27) to fix the gear (27) at the current position.

7. The telescopic lifting frame for narrow spaces as claimed in claim 6, wherein said retaining member (3) has a diameter that gradually increases from the inner end to the outer end, and a plurality of elastic stopping pieces (29) are provided at intervals in the middle of the through hole (241), said elastic stopping pieces (29) dividing the through hole into an inner hole and an outer hole that are communicated with each other; a return spring (31) is arranged in the inner hole, the return spring (31) is sleeved on the abutting piece (3), and the inner end of the return spring is fixed on the side wall of the inner hole; the pressing piece (3) is pressed inwards until the outer end of the pressing piece (3) extrudes the elastic stop piece (29) and is placed in the inner hole, the inner end of the pressing piece (3) is tightly attached to the side end of the gear (27), and the gear (27) is fixed at the current position; after the outer end of the abutting piece (3) is pressed again, the outer end of the abutting piece (3) extrudes the elastic blocking piece (29) outwards under the jacking action of the return spring (31) and extends out of the mounting box (24), and a gap is formed between the inner end and the side end of the gear.

8. Telescopic lifting frame for narrow spaces according to claim 7, characterised in that the abutment member (3) is on the same axis as the centre of the gear wheel (27).

9. The telescopic lifting frame for narrow spaces according to claim 1, wherein a base plate (4) is provided at the bottom of the lower tube (23) of each telescopic support tube (2), and a plurality of diagonal braces having ends fixed to the outer wall of the lower tube by welding are provided on the base plate (4).