CN112209292A

CN112209292A - Building site work piece lifting machinery device

Info

Publication number: CN112209292A
Application number: CN202011181334.5A
Authority: CN
Inventors: 沈国荣
Original assignee: Deqing Shijin Intelligent Technology Co Ltd
Current assignee: Deqing Shijin Intelligent Technology Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-01-12

Abstract

The invention relates to the technical field of lifting devices, and discloses a mechanical lifting device for a workpiece in a construction site, which comprises an upper cover, wherein a transmission device is arranged at the upper end of the upper cover, the transmission device comprises a double-head motor, a transmission rod and a threaded rod, the lower surface of the upper cover is connected with a supporting device, the supporting device comprises supporting columns, a first sliding chute and a first supporting leg, lifting plates are connected among the supporting columns in a sliding manner, a clamping device is arranged on each lifting plate, a material conveying box is arranged at the upper end of each lifting plate, and an anti-slipping device is arranged on one side of each supporting column. The supporting device is suitable for the ground with uneven construction site, the device is stable, the device is prevented from side turning, the device can be folded and is convenient to carry, the clamping device is arranged on the lifting plate, the material conveying box on the lifting plate is convenient to clamp and take down, the net cover is convenient to disassemble, the operation time is saved, and the anti-slip device prevents operators from being injured due to the fact that the lifting plate slips because of sudden power failure in the operation process.

Description

Building site work piece lifting machinery device

Technical Field

The invention relates to the technical field of lifting devices, in particular to a mechanical device for lifting a workpiece in a construction site.

Background

Building site, yue language building ground, construction ground, for short ground, is a place where building projects are being developed and civil engineering is carried out, and often the scope is enclosed by bounding walls, wire netting or bounding walls, the access of personnel, materials, machinery and vehicles is restricted, and building materials need to be transported to a certain height on the building site, so that constructors can conveniently use the building materials. But at present use the lift loop wheel machine to accomplish, the operation is dangerous, wastes time and energy, and the lift in-process material drops easily.

Disclosure of Invention

The invention aims to provide a workpiece lifting mechanical device for a construction site, which achieves the aim of conveniently conveying materials.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a building site work piece lift mechanical device, includes the upper cover, transmission is installed to the upper cover upper end, transmission includes double-end motor, transfer line and threaded rod, the upper cover lower surface is connected with strutting arrangement, strutting arrangement includes support column, first spout and first supporting leg, sliding connection has the lifter plate between the support column, install the chucking device on the lifter plate, the lifter plate upper end is equipped with the fortune workbin, anti-skidding device is installed to support column one side.

Preferably, upper cover upper end fixed mounting has the transmission case, the transmission case sets up for cavity, transmission case inner wall bottom fixed mounting has double-end motor, the equal fixedly connected with transfer line in double-end motor both ends, the first conical gear of transfer line one end fixedly connected with, the equal fixed mounting in upper cover both sides has second end block, the threaded rod runs through second end block, and inserts in the transmission case, threaded rod upper end fixed mounting has second conical gear, second conical gear and first conical gear meshing are connected.

Preferably, the lower end of the upper cover is fixedly connected with a support column through a bolt, a first groove is formed in the front face of the support column, the inner walls of the two sides of the first groove are connected with a first support leg through a bolt hinge, the first support leg is provided with an elongated slot on one side, the two sides of the inner wall of one end of the first support leg are connected with a second support leg through a bolt hinge, the first support leg is perpendicular to the support column, the second support leg is perpendicular to the first support leg, a second groove is formed in one side of the support leg, the two sides of the inner wall of the second groove are connected with a third support leg through a hinge, a buckle is fixedly installed on one side of the support column and is positioned on one side of the second groove, a third groove is formed in one side of the third support leg close to the support column, a first spring is arranged in the third, the other end is fixedly connected with the inner wall of the second groove, and one side of the support column is provided with a first sliding groove.

Preferably, the upper end of the lifting plate is provided with a second chute, the two sides of the lifting plate are fixedly provided with the baffle plates, the two sides of the lifting plate are fixedly provided with first end blocks, the first end blocks are provided with threaded holes and are in threaded connection with the threaded rods, the two sides of the lifting plate are fixedly connected with first pulleys, and the first pulleys are clamped inside the first chutes and are in sliding connection with the first chutes.

Preferably, the clamping device comprises a first shell, a first shifting block, a second spring and a first clamping block, the first shell is fixedly installed at the upper end of the lifting plate, the first clamping block is clamped inside the first shell, the upper end of the first clamping block penetrates through the first shell, the second spring is installed at the lower end of the first clamping block, one end of the second spring is fixedly connected with the lower end of the first clamping block, the other end of the second spring is fixedly connected with the bottom of the inner wall of the first shell, the first shifting block is fixedly installed on one side of the first clamping block, and the first shifting block penetrates through the side wall of the first shell.

Preferably, four second pulleys are fixedly mounted at the lower end of the material conveying box, the second pulleys are clamped in the second sliding grooves and are in sliding connection with the second sliding grooves, a handle is fixedly mounted on the front side of the material conveying box, T-shaped blocks are fixedly connected to the two sides of the upper end of the material conveying box, a net cover is arranged at the upper end of the material conveying box, T-shaped grooves are formed in the lower surface of the net cover, the T-shaped blocks are in sliding connection with the T-shaped grooves, a rotating buckle is fixedly mounted on the front side of the net cover, and the net cover is fixedly connected with the material conveying box through the rotating buckle.

Preferably, the anti-slipping device comprises a second shell, a third spring, a second clamping block and a second shifting block, the second shell is fixedly mounted on one side of the supporting column, the second clamping block is clamped inside the second shell, one end of the second clamping block penetrates through one side of the second shell and the supporting column and is inserted into the first sliding groove, the third spring is mounted inside the second shell, one end of the third spring is fixedly connected with the second clamping block, the other end of the third spring is fixedly connected with the inner wall of the shell, the second shifting block is mounted on the front face of the second clamping block, and the second shifting block penetrates through the second shell.

Preferably, a part of the first latch penetrating through the first housing is at a sixty-degree angle.

The invention provides a building site workpiece lifting mechanical device. The method has the following beneficial effects:

(1) according to the invention, the first support leg and the second support leg are arranged and hinged through the bolt, the second support leg can be folded and combined into the long groove of the first support leg, the first support leg is hinged with the first groove in the front of the support column through the bolt, the first support leg can also be combined into the first groove, the third support leg is hinged with the second groove and can be matched with the second groove, the first spring is arranged between the second groove and the third support leg, the third support leg can be combined with the second groove through the buckle, the third support leg can be popped out under the action of the first spring by pulling the buckle, the device is more suitable for the ground with uneven construction site, the device is more stable, the device is prevented from being turned over, and can be folded when not used, and the carrying is convenient.

(2) According to the invention, through arranging the lifting plate, the lifting plate can carry out up-and-down transportation motion under the action of rotation of the threaded rod, the upper end of the lifting plate is provided with the clamping device, the lower end of the material conveying box is provided with the second pulley, the material conveying box filled with materials can be conveniently pushed to the lifting plate, the material conveying box is contacted with the sixty-degree inclined plane of the first clamping block, the first clamping block can shrink downwards under the action of the second spring, then when the material conveying box completely reaches the lifting plate, the first clamping block pops out under the action of the second spring, the rear end of the first clamping block is a flat surface, the material conveying box can be clamped on the lifting plate, when the height of the material conveying box is raised to a certain height, an operator can push the material conveying box downwards by pressing the first shifting block downwards, so that the first clamping block shrinks downwards, the material conveying box can be conveniently pushed out, the time and labor are saved for the.

(3) According to the invention, the net cover is arranged on the material conveying box, the T-shaped groove on the net cover is matched with the T-shaped block on the material conveying box, and then the rotating buckle is rotated, so that the net cover can be fixed on the material conveying box, the phenomenon that conveyed materials fall down due to shaking in the process of lifting the material conveying box is prevented, the rotating rod is rotated, the net cover is pulled, the disassembly and the matching are convenient, and the conveying time is saved.

(4) According to the anti-slipping device, the lifting plate rises, the first pulley is in contact with the inclined surface of the second clamping block, the second clamping block retracts under pressure, the first pulley passes through the second clamping block, the second clamping block is popped out under the action of the third spring, the lifting plate is arranged at the uppermost end, the second shifting block is pulled, the lifting plate can descend, and the situation that an operator is suddenly powered off in the operation process to cause the lifting plate to slip off and hurt the operator is prevented.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view in another aspect of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a bottom view of the present invention;

FIG. 5 is a partial view of section A of FIG. 2 in accordance with the present invention;

FIG. 6 is a partial cross-sectional view of FIG. 3D of the present invention;

FIG. 7 is a partial view of section C of FIG. 1 in accordance with the present invention;

fig. 8 is a partial sectional view B of fig. 3 according to the present invention.

In the figure: 1. an upper cover; 2. a support device; 21. a support pillar; 22. a first groove; 23. a first support leg; 24. a second support leg; 25. a second groove; 26. a third support leg; 27. a first spring; 28. buckling; 29. a third groove; 201. a first chute; 3. a lifting plate; 31. a first pulley; 32. a second chute; 33. a clamping device; 301. a first housing; 302. a first shifting block; 303. a second spring; 304. a first clamping block; 4. a material conveying box; 41. a second pulley; 42. a grip; 43. a net cover; 44. turning and buckling; 45. a T-shaped block; 46. a T-shaped slot; 5. a transmission device; 51. a transmission case; 52. a double-headed motor; 53. a transmission rod; 54. a first bevel gear; 55. a second bevel gear; 56. a threaded rod; 57. a first end block; 58. a second end block; 6. an anti-slip device; 61. a second housing; 62. a third spring; 63. a second fixture block; 64. and a second shifting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 8, the present invention provides a technical solution: a workpiece lifting mechanical device for a construction site comprises an upper cover 1, a transmission device 5 is installed at the upper end of the upper cover 1, the transmission device 5 comprises a double-headed motor 52, a transmission rod 53 and a threaded rod 56, a transmission box 51 is fixedly installed at the upper end of the upper cover 1, the transmission box 51 is hollow, the double-headed motor 52 is fixedly installed at the bottom of the inner wall of the transmission box 51, the transmission rod 53 is fixedly connected with two ends of the double-headed motor 52, a first conical gear 54 is fixedly connected with one end of the transmission rod 53, second end blocks 58 are fixedly installed at two sides of the upper cover 1, the threaded rod 56 penetrates through the second end blocks 58 and is inserted into the transmission box 51, a second conical gear 55 is fixedly installed at the upper end of the threaded rod 56, the second conical gear 55 is meshed with the first conical gear 54, the double-headed motor 52 drives the threaded rod 56 to rotate through the transmission, the lower surface of the upper cover 1 is connected with a supporting device 2, the supporting device 2 comprises a supporting column 21, a first sliding groove 201 and a first supporting leg 23, the lower end of the upper cover 1 is fixedly connected with the supporting column 21 through a bolt, a first groove 22 is formed in the front surface of the supporting column 21, the inner walls of two sides of the first groove 22 are hinged with the first supporting leg 23 through bolts, one side of the first supporting leg 23 is provided with an elongated slot, two sides of the inner wall of one end of the first supporting leg 23 are hinged with a second supporting leg 24 through bolts, the first supporting leg 23 is vertical to the supporting column 21, the second supporting leg 24 is vertical to the first supporting leg 23, one side of the supporting leg is provided with a second groove 25, two sides of the inner wall of the second groove 25 are hinged with a third supporting leg 26, one side of the supporting column 21 is fixedly provided with a buckle 28, the buckle 28 is positioned on one, a first spring 27 is arranged in the third groove 29, one end of the first spring 27 is fixedly connected with the inner wall of the third groove 29, the other end of the first spring 27 is fixedly connected with the inner wall of the second groove 25, one side of the support column 21 is provided with a first sliding groove 201, four first support legs 23, four second support legs 24 and four third support legs 26 are respectively arranged, the first support legs 23 and the second support legs 24 are arranged, the first support legs 23 are hinged with the second support legs 24 through bolts, the second support legs 24 can be folded and combined in long grooves of the first support legs 23, the first support legs 23 are hinged with the first grooves 22 on the front surfaces of the support columns 21 through bolts, the first support legs 23 can also be combined in the first grooves 22, the third support legs 26 are hinged with the second grooves 25 and can be matched with the second grooves 25, the first spring 27 is arranged between the second grooves 25 and the third support legs 26, the third support legs 26 can be combined with the second grooves 25 through buckles 28, the third supporting leg 26 of the pulling buckle 28 can be popped out under the action of the first spring 27, the device is more suitable for the ground with uneven construction site, the device is more stable, the device can be folded when being prevented from side turning, the device is convenient to carry, the lifting plate 3 is connected between the supporting columns 21 in a sliding way, the upper end of the lifting plate 3 is provided with the second chute 32, both sides of the lifting plate 3 are fixedly provided with baffle plates, both sides of the lifting plate 3 are fixedly provided with the first end block 57, the first end block 57 is provided with a threaded hole, the first end block 57 is in threaded connection with the threaded rod 56, both sides of the lifting plate 3 are fixedly connected with the first pulley 31, the first pulley 31 is clamped in the first chute 201 and is in sliding connection with the first chute 201, the friction of the lifting plate 3 is reduced in the ascending or descending process by arranging the first pulley 31 to be matched with the first chute 201, the stability of the lifting, the lifting plate 3 can carry out up-and-down transportation movement under the action of rotation of the threaded rod 56, the upper end of the lifting plate 3 is provided with the clamping device 33, the lower end of the material conveying box 4 is provided with the second pulley 41, the material conveying box 4 filled with materials can be conveniently pushed to the lifting plate 3, the material conveying box 4 is contacted with an inclined plane with sixty degrees of the first clamping block 304, the first clamping block 304 can be downwards contracted under the action of the second spring 303, then when the material conveying box 4 completely reaches the lifting plate 3, the first clamping block 304 can be popped out under the action of the second spring 303, the rear end of the first clamping block 304 is a flat surface, the material conveying box 4 can be clamped on the lifting plate 3, when the material conveying box rises to a certain height, an operator can downwards push the material conveying box 4 out conveniently by pressing the first shifting block 302, the time and labor can be saved for the operator, the operation is convenient, the clamping device 33 is arranged on the lifting plate 3, the four clamping devices 33 are respectively positioned at four corners of the lifting plate 3, each clamping device 33 comprises a first shell 301, a first shifting block 302, a second spring 303 and a first clamping block 304, the first shell 301 is fixedly arranged at the upper end of the lifting plate 3, the first clamping block 304 is clamped in the first shell 301, the upper end of the first clamping block 304 penetrates through the first shell 301, the part of the first clamping block 304 penetrating through the first shell 301 is in a sixty-degree angle, the second spring 303 is arranged at the lower end of the first clamping block 304, one end of the second spring 303 is fixedly connected with the lower end of the first clamping block 304, the other end of the second spring 303 is fixedly connected with the bottom of the inner wall of the first shell 301, the first shifting block 302 is fixedly arranged at one side of the first clamping block 304, the first shifting block 302 penetrates through the side wall of the first shell 301, a material conveying box 4 is arranged at the upper end of the lifting plate 3, four second pulleys 41 are fixedly arranged at the lower end of the material conveying box, and is connected with the second chute 32 in a sliding manner, the front surface of the material transporting box 4 is fixedly provided with a handle 42, two sides of the upper end of the material transporting box 4 are fixedly connected with a T-shaped block 45, the upper end of the material transporting box 4 is provided with a net cover 43, the lower surface of the net cover 43 is provided with a T-shaped groove 46, the T-shaped block 45 is connected with the T-shaped groove 46 in a sliding manner, the front surface of the net cover 43 is fixedly provided with a rotating buckle 44, the net cover 43 is fixedly connected with the material transporting box 4 through the rotating buckle 44, the net cover 43 is provided with the net cover 43, the T-shaped groove 46 on the net cover 43 is matched with the T-shaped block 45 on the material transporting box 4, the rotating buckle 44 is rotated, the net cover 43 can be fixed on the material transporting box 4, the phenomenon that the material is dropped due to the shaking in the ascending process of the material transporting box 4 is prevented, the rotating rod is rotated, the net cover 43 is pulled, A third spring 62, a second block 63 and a second shifting block 64, wherein the second housing 61 is fixedly installed at one side of the supporting column 21, the second block 63 is clamped inside the second housing 61, one end of the second block 63 penetrates through one side of the second housing 61 and the supporting column 21 and is inserted into the first sliding groove 201, the third spring 62 is installed inside the second housing 61, one end of the third spring is fixedly connected with the second block 63, the other end of the third spring is fixedly connected with the inner wall of the housing, the second shifting block 64 is installed at the front surface of the second block 63, the second shifting block 64 penetrates through the second housing 61, an anti-slip device 6 is arranged, the lifting plate 3 is lifted, the first pulley 31 contacts with the inclined surface of the second block 63, the second block 63 is retracted under pressure, the first pulley 31 passes through the second block 63, the second block 63 is ejected under the action of the third spring 62, the lifting plate 3 is clamped at the uppermost end, the second shifting block 64 is pulled, and the lifting plate 3 can be lowered, prevent that operating personnel from cutting off the power supply suddenly and causing lifter plate 3 landing in the operation process, and cause the injury to operating personnel.

When in use, the supporting device 2 is provided with a plurality of supporting legs which can be folded and are suitable for various construction sites, so that the supporting legs are stably supported and the inclination condition is prevented in the lifting process, the material conveying box 4 filled with materials is pushed onto the lifting plate 3, the second pulley 41 below the material conveying box 4 slides in the second sliding groove 32, the first fixture block 304 on the clamping device 33 contracts downwards, when the rear side of the material conveying box 4 contacts with the rest fixture blocks on the clamping device 33, the first fixture block 304 on the front side returns under the action of the second spring 303, then the double-head motor 52 rotates to drive the lifting plate 3 to ascend to a certain height, the first pulley 31 on one side contacts with the second fixture block 63, the second fixture block 63 contracts backwards, when the pulley rises to the highest point, the second fixture block 63 pops out under the action of the third spring 62, even if the power is off, the lifting plate 3 is clamped by the second fixture block 63, and can not the landing, stir first shifting block 302 at the operating personnel who exceeds the operation, make first fixture block 304 contract down, can be convenient push away fortune workbin 4, convenient laborsaving, take out the material in the fortune workbin 4 at last, push up lifter plate 3 with fortune workbin 4, stir second shifting block 64, make second fixture block 63 contract backward, double-end motor 52 rotates, makes lifter plate 3 descend.

To sum up can, strutting arrangement 2 sets up many supporting legs, it is more stable to make lifting mechanical device, be applicable to changeable building site ground, the supporting leg is collapsible, conveniently carry, increase the space utilization, the second pulley 41 that chucking device 33 and fortune workbin 4 bottoms set up can be with the convenient release of fortune workbin 4 and lock on lifter plate 3, make operating personnel labour saving and time saving, convenient operation, anti-skidding device 6 prevents the outage suddenly, lifter plate 3 landing suddenly, prevent the emergence of accident, ensure the safety in the operating personnel operation process.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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

1. A building site work piece lifting machinery device, includes upper cover (1), its characterized in that: transmission (5) are installed to upper cover (1) upper end, transmission (5) include double-end motor (52), transfer line (53) and threaded rod (56), upper cover (1) lower surface is connected with strutting arrangement (2), strutting arrangement (2) are including support column (21), first spout (201) and first supporting leg (23), sliding connection has lifter plate (3) between support column (21), install chucking device (33) on lifter plate (3), lifter plate (3) upper end is equipped with fortune workbin (4), antiskid device (6) that falls is installed to support column (21) one side.

2. A construction site work lifting mechanism as claimed in claim 1, wherein: the utility model discloses a gearbox, including upper cover (1), transmission case (51), double-end motor (52), threaded rod (56), upper cover (1) upper end fixed mounting has transmission case (51), transmission case (51) sets up for the cavity, transmission case (51) inner wall bottom fixed mounting has double-end motor (52), the equal fixedly connected with transfer line (53) in double-end motor (52) both ends, the first conical gear (54) of transfer line (53) one end fixedly connected with, the equal fixed mounting in upper cover (1) both sides has second end block (58), second end block (58) are run through in threaded rod (56), and insert in transmission case (51), threaded rod (56) upper end fixed mounting has second conical gear (55), second conical gear (55) and first conical gear (.

3. A construction site work lifting mechanism as claimed in claim 1, wherein: the lower end of the upper cover (1) is fixedly connected with a support column (21) through a bolt, a first groove (22) is openly formed in the support column (21), inner walls on two sides of the first groove (22) are connected with first support legs (23) through bolt hinges, one side of each first support leg (23) is provided with an elongated slot, two sides of the inner wall of one end of each first support leg (23) are connected with second support legs (24) through bolt hinges, the first support legs (23) are perpendicular to the support column (21), the second support legs (24) are perpendicular to the first support legs (23), one side of each support leg is provided with a second groove (25), two sides of the inner wall of each second groove (25) are connected with third support legs (26) through bolt hinges, one side of the support column (21) is fixedly provided with a buckle (28), and the buckle (28) is positioned on one side of the second groove (, one side that third supporting leg (26) is close to support column (21) is equipped with third recess (29), be equipped with first spring (27) in third recess (29), first spring (27) one end and third recess (29) inner wall fixed connection, the other end and second recess (25) inner wall fixed connection, first spout (201) have been seted up to support column (21) one side.

4. A construction site work lifting mechanism as claimed in claim 3, wherein: the lifting plate is characterized in that a second sliding groove (32) is formed in the upper end of the lifting plate (3), baffle plates are fixedly mounted on two sides of the lifting plate (3), first end blocks (57) are fixedly mounted on two sides of the lifting plate (3), threaded holes are formed in the first end blocks (57), the first end blocks (57) are in threaded connection with threaded rods (56), first pulleys (31) are fixedly connected to two sides of the lifting plate (3), and the first pulleys (31) are clamped inside the first sliding grooves (201) and are in sliding connection with the first sliding grooves (201).

5. A construction site work lifting mechanism as claimed in claim 1, wherein: chucking device (33) include first casing (301), first shifting block (302), second spring (303) and first fixture block (304), first casing (301) fixed mounting is in the upper end of lifter plate (3), first fixture block (304) card is established inside first casing (301), and the upper end of first fixture block (304) runs through first casing (301), second spring (303) are installed at first fixture block (304) lower extreme, second spring (303) one end and first fixture block (304) lower extreme fixed connection, the other end and first casing (301) inner wall bottom fixed connection, first shifting block (302) fixed mounting is in one side of first fixture block (304), first shifting block (302) runs through the lateral wall of first casing (301).

6. A construction site work piece lifting mechanism as claimed in claim 4, wherein: fortune workbin (4) lower extreme fixed mounting has four second pulleys (41), second pulley (41) card is established in second spout (32), and with second spout (32) sliding connection, fortune workbin (4) openly fixed mounting has handle (42), the equal fixedly connected with T-shaped piece (45) in fortune workbin (4) upper end both sides, fortune workbin (4) upper end is equipped with net lid (43), T-shaped groove (46) have been seted up to net lid (43) lower surface, T-shaped piece (45) and T-shaped groove (46) sliding connection, net lid (43) openly fixed mounting has to change and detain (44), net lid (43) are through changeing detaining (44) and fortune workbin (4) fixed connection.

7. A construction site work lifting mechanism as claimed in claim 3, wherein: the anti-slipping device (6) comprises a second shell (61), a third spring (62), a second clamping block (63) and a second shifting block (64), the second shell (61) is fixedly installed on one side of the supporting column (21), the second clamping block (63) is clamped inside the second shell (61), one end of the second clamping block (63) penetrates through one side of the second shell (61) and the supporting column (21) and is inserted into the first sliding groove (201), the third spring (62) is installed inside the second shell (61), one end of the third clamping block is fixedly connected with the second clamping block (63), the other end of the third clamping block is fixedly connected with the inner wall of the shell, the second shifting block (64) is installed on the front face of the second clamping block (63), and the second shifting block (64) penetrates through the second shell (61).

8. A construction site work piece lifting and lowering mechanism as claimed in claim 5, wherein: the part of the first fixture block (304) penetrating through the first shell (301) is at a sixty-degree angle.