Automatic lifting truck for wet joint formwork

Abstract

An automatic lifting carriage for wet joint formwork, characterized in that it comprises a chassis (1), a winch (2) being mounted on the top of the chassis (1), a rotary shaft (3) being rotatably mounted on the front end of the chassis (1), a lifting part (4) being mounted on the rotary shaft (3), the lifting part (4) comprising a steel wire rope (5) wound around the rotary shaft (3) and a hook (6) being mounted on the free end of the steel wire rope (5), the hook (6) being arranged in the middle of the chassis (1) in the width direction, at least two lifting parts (4) being mounted on the rotary shaft (3), and the axial position of the lifting part (4) on the rotary shaft (3) being adjustable.

Description

Technical FieldThe present invention relates to the technical field of road and bridge construction, in particular to an automatic lifting truck for wet-seam formworks.Prior ArtWhen constructing wet joints in roads and bridges, a wet joint formwork is raised from below the bridge to the wet joint sole and installed there. As a rule, the wet-seam formwork is raised manually without further auxiliary tools by means of a polyester cable directly from below the bridge onto the wet-seam sole and installed there. At relatively low bridge heights, this design is easy to use, but at high bridge heights, this design is inefficient, the construction time is long, the work intensity of the construction workers is high, and the use of construction work is relatively high. The existing wet joint design slows down the progress of the wet joint, increases the process cycle time of the building team, increases the use of construction work, and the construction is also uncertain. At the same time, after completion of the concreting of the wet joint, the dismantling of the formwork is also carried out manually with the polyester rope in order to lift the formwork from the wet joint sole to below the bridge, so this construction of the wet joint without the aid of auxiliary tools is neither scientific, nor reasonable, nor economical.Content of the InventionIn order to solve the above technical problem, the present invention proposes an automatic lift truck for wet-seam formworks.The technical solution of the present invention is achieved in this way:An automatic hoisting truck for wet-seam formworks comprises a chassis, wherein a winch is attached to the top of the chassis, a rotary shaft is rotatably attached to the front end of the chassis, a lifting part is attached to the rotary shaft, the lifting part comprises a steel wire rope wound around the rotary shaft and a hook attached to the free end of the steel wire rope, and the hook is arranged at the center of the chassis in the width direction, at least two lifting parts are attached to the rotary shaft, and the axial position of the lifting part is adjustable on the rotary shaft.Further, the elevating part includes a shaft sleeve, wherein the outer side of the rotating shaft is slidably sheathed by the shaft sleeve, the steel wire rope is wound around the outer side of the shaft sleeve, a positioning pin is penetrated at both ends of the outer side of the shaft sleeve, respectively, and the rotating shaft is opened with positioning holes for inserting the positioning pins.Further, the positioning pin includes a first rod-shaped portion having a smooth surface and a threaded portion provided at one end of the first rod-shaped portion, wherein a pair of bushes which can be screwed to the threaded portion is provided corresponding to each positioning pin on both sides of the shaft sleeve, and each pair of bushes lies on the same diameter line of the shaft sleeve, the inner diameter of the bush corresponds to the outer diameter of the first rod-shaped portion, and the outer end of the bush is provided with a through hole corresponding to the outer diameter of the first rod-shaped portion.Further, the length of the internal cavity of the female screw is formed to be larger than the length of the threaded portion, and the positioning pin includes a second rod-shaped portion provided at an end of the threaded portion opposite to the first rod-shaped portion, the second rod-shaped portion is a rod-shaped structure having a smooth surface, and the surface of the rotating shaft is provided with an annular slide groove having a width corresponding to the outer diameter of the second rod-shaped portion, and the second rod-shaped portion is capable of making a circular motion in the annular slide groove after being disengaged from the positioning hole.Further, an end of the shaft sleeve is fixedly sheathed by a ratchet wheel, a ratchet wheel block is provided on a side of the ratchet wheel to secure the shaft sleeve against twisting in the direction of releasing the steel wire rope, a slide rod is provided in parallel on a side of the rotation shaft, and a rod sleeve is fixedly attached to the end of the ratchet wheel block facing away from the shaft sleeve, and the rod sleeve is slidably supported at an end on the outside of the slide rod, and a distance between the slide rod and the rotation shaft is larger than the length of the positioning pin.Furthermore, the two positioning pins on the shaft sleeve are symmetrically distributed on both sides of the shaft sleeve, the outer side of the ratchet block is displaceably sheathed by a toothed sleeve, a spring is provided in the toothed sleeve, which spring gives the toothed block elasticity in order that it can move out of the toothed sleeve, and the rod sleeve is fixedly attached to the end of the toothed sleeve facing away from the toothed block.Furthermore, the rod sleeve is provided with a threaded bore at an end facing away from the ratchet block, and a set screw is screwed into the threaded bore, the inner end of which screw abuts the surface of the sliding rod.Further, the rotating shaft includes a plurality of rotating shaft bodies sequentially connected to each other, one end of the rotating shaft body is opened in a central symmetry manner with a plurality of connection thread grooves, the surface of the other end of the rotating shaft body is opened with connection notches corresponding to the thread grooves one-to-one, a connection bolt that can be screwed with the connection thread groove is provided in the connection notch.Further, the outer end of the outermost rotating shaft body is connected to an auxiliary support bracket, the auxiliary support bracket comprising an open U-shaped beam bent downward, a support plate vertically mounted in the upper center of the U-shaped beam, and a support axle body rotatably supported at the upper end of the support plate, the outer surface of the support axle body is opened with support bracket notches corresponding to the connection thread grooves one-to-one, and is provided with fastening bolts disposed in the support bracket notches, the end of the fastening bolt facing the first shaft body penetrates the support axle body and is screwed to the connection thread groove in the rotating shaft body.Further, the slide rod includes a plurality of rod bodies connected to each other in sequence, one end of the rod body is fixedly provided with a terminal threaded post, and the other end of the rod body is provided with a terminal threaded groove that can be screwed to the terminal threaded post, an auxiliary support rod is rotatably supported on one side of the support plate, and the chassis-facing end of the support rod is provided with a support threaded post that can be fitted into the terminal threaded groove. The present invention has the following advantageous effects: 1. in an automatic lift truck for wet-seam formwork provided according to the present invention, a winch is used to lift the wet-seam formwork, which reduces the outlay on construction work. In addition, the progress of construction is accelerated compared to manual lifting, the construction time is shortened, and the construction efficiency is increased. 2. the entire lifting and installation process of the formwork is controlled via the reversing switch of the winch, whereby the progress of the installation of the wet joint formwork is improved and the entire lifting and installation process can be interrupted and adjusted at any time. 3. the chassis is designed to be easily movable in order to facilitate the transport of the wet-joint formwork between different working areas. 4. the operator's frame is controlled by the operator via a switch and the winch is used for raising, installing the formwork and transporting the formwork between different working areas, whereby the operator does not have to rely on the conventional polyester rope for raising, so that the construction safety is higher. 5. the apparatus has a high degree of mechanization. The formwork is easily controllable and can be adapted at any time. The operation is simple and can be carried out by an operating personnel after simple corresponding training, whereby a one-person operation is possibleExplanation of the Drawings:FIG. 1 shows a schematic overall illustration of an automatic lift truck for wet-seam formworks according to the present utility model; FIG. 2 is an enlarged view of A in FIG. 1 according to the present invention; FIG. 3 is an enlarged view of B in FIG. 1 according to the present invention; FIG. 4 is a schematic illustration of the pivot shaft, the slide rod and the lifting member in disassembled form according to the present invention; FIG. 5 is an enlarged view of C in FIG. 4 according to the present invention; FIG. 6 is an enlarged view of D in FIG. 4 according to the present invention; FIG. 7 is an enlarged view of E in FIG. 4 according to the present invention; FIG. 8 is an enlarged view of F in FIG. 4 according to the present invention; FIG. 9 is a schematic view of the gear sleeve and the rod sleeve after slicing according to the present invention.In the drawings are: 1. chassis; 2. winch; 3. rotating shaft; 3.1. rotating shaft body; 4. lifting part; 5. steel wire rope; 6. hook; 7. shaft sleeve; 8. positioning pin; 8.1. first rod-shaped portion; 8.2. Threaded section; 8.3. second rod-shaped section; 9th positioning bore; 10th threaded bushing; 11th through bore; 12th annular sliding groove; 13th ratchet wheel; 14th ratchet wheel block; 15th sliding rod; 15.1. Rod body; 16th Rod sleeve; 17th Toothed sleeve; 18th Spring; 19th Threaded bore; 20th Adjusting screw; 21st Connecting threaded groove; 22nd Connecting notch; 23rd Connecting bolt; 24th Auxiliary support holder 24.1. U-shaped support; 24.2. Support plate; 24.3. Support axle body; 24.4. Support Retaining Notch; 24.5. Fastening bolts; 25th connection threaded post 26th connection threaded groove; 27th auxiliary support rod; 28th support threaded post.Exemplary EmbodimentAn exemplary embodiment of the present invention is explained in more detail below with reference to the drawings. As shown in FIGS. 1 to 9, an automatic hoisting truck for wet-seam formwork comprises a chassis 1, a winch 2 is attached to the top of the chassis 1, a rotary shaft 3 is rotatably attached to the front end of the chassis 1, a hoisting member 4 is attached to the rotary shaft 3, the hoisting member 4 comprises a steel wire rope 5 wound around the rotary shaft 3 and a hook 6 attached to the free end of the steel wire rope 5, and the hook 6 is arranged at the center of the chassis 1 in the width direction, at least two hoisting members 4 are attached to the rotary shaft 3, and the axial position of the hoisting member 4 is adjustable on the rotary shaft 3.After the automatic lift truck for wet-seam formwork according to this exemplary embodiment is put into operation, the winch 2 is used for lifting the wet-seam formwork, which reduces the outlay on construction work. In addition, the progress of construction is accelerated compared to manual lifting, the construction time is shortened, and the construction efficiency is increased. At the same time, the entire lifting and installation process of the formwork is controlled via the reversing switch of the winch 2, whereby the progress of installation of the wet-joint formwork is improved and the entire lifting and installation process can be interrupted and adapted at any time. Moreover, the chassis 1 is easily movable in order to facilitate the transport of the wet-joint formwork between different working areas.A plurality of lifting parts 4 are provided to enable simultaneous lifting of a plurality of formworks during operation of the wet-seam formwork, and after simultaneous lifting of the plurality of formworks, a plurality of workers cooperate to connect and fasten the plurality of formworks, thereby significantly improving the efficiency of operation.The elevating part 4 includes a shaft sleeve 7, the outer side of the rotating shaft 3 is slidably sheathed by the shaft sleeve 7, the steel wire rope 5 is wound around the outer side of the shaft sleeve 7, a positioning pin 8 is penetratingly provided at both ends of the outer side of the shaft sleeve 7, respectively, and the rotating shaft 3 is opened with positioning holes 9 for inserting the positioning pins 8.The positioning pin 8 is inserted into the positioning hole 9 to fix the shaft sleeve 7 to the rotation shaft 3. At the same time, the shaft sleeve 7 can be removed from the rotary shaft 3 after the positioning pin 8 is pulled out of the positioning bore 9. In this way, the operator can select a different number of shaft sleeves 7 to be mounted on the rotary shaft 3 as required, and thus adapt to simultaneously lifting a different number of wet joint formworks according to the operating conditions of the wet joint construction.The positioning pin 8 comprises a first rod-shaped portion 8.1 with a smooth surface and a threaded portion 8.2 provided at one end of the first rod-shaped portion 8.1, wherein corresponding to each positioning pin 8 on both sides of the shaft sleeve 7 a pair of threaded bushes 10 is provided which can be screwed to the threaded portion 8.2, and each pair of threaded bushes 10 lies on the same diameter line of the shaft sleeve 7, the inner diameter of the threaded bush 10 corresponds to the outer diameter of the first rod-shaped portion 8.1, and the outer end of the threaded bush 10 is provided with a through bore 11 which corresponds to the outer diameter of the first rod-shaped portion 8.1.When using the positioning pin 8 for fastening the shaft sleeve 7 on the rotary shaft 3, the threaded section 8.2 of the positioning pin 8 is passed through the positioning bore 9 and then introduced into the opposite threaded bushing 10 and screwed to the threaded bushing 10. In this way, the positioning pin 8 is effectively fixed, which improves the stability of fixing the shaft sleeve 7 to the rotating shaft 3, thereby ensuring that the positioning pin 8 does not come off during the rotation of the rotating shaft 3.The first rod-shaped portion 8.1 is formed to fit in the through hole 11 in the female screw 10 through which it penetrates, so that the positioning pin 8 can effectively contact the two female screws 10 simultaneously, thereby improving the stability of attaching the shaft sleeve 7 to the rotary shaft 3.The length of the inner cavity of the threaded bushing 10 is designed to be greater than the length of the threaded section 8.2, and the positioning pin 8 comprises a second rod-shaped section 8.3 which is provided at an end of the threaded section 8.2 facing away from the first rod-shaped section 8.1, wherein the second rod-shaped section 8.3 is a rod-shaped structure with a smooth surface and the surface of the rotary shaft 3 is provided with an annular sliding groove 12 whose width corresponds to the outer diameter of the second rod-shaped section 8.3, and the second rod-shaped section 8.3 can execute a circular movement in the annular sliding groove 12 after being released from the positioning bore 9.If a difference in height occurs between the formworks during the simultaneous lifting of a plurality of formworks, the winch 2 is stopped and the positioning pin 8 on the lifting part 4 is rotated in accordance with the formwork to be adjusted in height, so that the threaded section 8.2 of the positioning pin 8 is pulled out of the opposite threaded bushing 10 and then introduced through the positioning bore 9 into the other threaded bushing 10, where the threaded section 8.2 is screwed to the threaded bushing 10. At this time, the second rod-shaped portion 8.3 is located in the annular slide groove 12, and by the cooperation of the second rod-shaped portion 8.3 with the annular slide groove 12, the position of the shaft sleeve 7 in the longitudinal direction of the rotary shaft 3 can be restricted. At the same time, the positioning pin 8 is directly used as a handle for rotating the shaft sleeve 7, and the shaft sleeve 7 rotates on the outside of the rotating shaft 3 to achieve the effect of manually adjusting individual heights of a single formwork. In this way, the initial height of the hooks 6 on all the shaft sleeves 7 can also be adjusted to remain uniform, whereby the automatic lift truck for wet-seam formworks becomes more conformable and better meets the different requirements of construction work.One end of the shaft sleeve 7 is tightly sheathed by a ratchet wheel 13, a ratchet wheel block 14 is provided on one side of the ratchet wheel 13 to secure the shaft sleeve 7 against rotation in the direction of releasing the steel wire rope 5, a slide rod 15 is provided in parallel on one side of the rotation shaft 3, and a rod sleeve 16 is fixedly attached to the end of the ratchet wheel block 14 remote from the shaft sleeve 7, and the rod sleeve 16 is slidably supported at one end on the outside of the slide rod 15, and a distance between the slide rod 15 and the rotation shaft 3 is larger than the length of the positioning pin 8. At this time, the ratchet block 14 cooperates with the ratchet 13 to limit the state of the rotation of the rotary shaft 3 and the shaft sleeve 7 and the associated downward release of the steel wire rope 5, so that the formwork can be prevented from falling down during the formwork raising, thereby improving the safety of the formwork raising operation. When the height of a single formwork is adjusted, the ratchet block 14 cooperates with the ratchet 13 to limit the formwork falling, so that the manual adjustment of the height of the formwork is safer, and at the same time, in manually adjusting the height of the formwork, it is also convenient for the operator to release the positioning pin 8 at all times to perform other related cooperation operations, making the construction work more convenient.The two positioning pins 8 on the shaft sleeve 7 are symmetrically distributed on both sides of the shaft sleeve 7, the outer side of the ratchet block 14 is displaceably surrounded by a toothed sleeve 17, a spring 18 is provided in the toothed sleeve 17, which spring gives the toothed block elasticity in order that it can move out of the toothed sleeve 17, and the rod sleeve 16 is fixedly attached to the end of the toothed sleeve 17 facing away from the toothed block. The rod sleeve 16 is provided with a threaded bore 19 at an end remote from the ratchet block 14, and a set screw 20 is screwed into the threaded bore 19, the inner end of which screw abuts the surface of the slide rod 15. By rotating the adjusting screw 20, the adjusting screw 20 is pressed against the outside of the slide rod 15, so that the position of the ratchet block 14 can be fixed by fixing the position of the rod sleeve 16. Moreover, by rotating the adjusting screw 20, the adjusting screw 20 can be released from the slide rod 15 and the position of the ratchet block 14 can be adjusted by sliding the rod sleeve 16 on the outside of the slide rod 15.The rotating shaft 3 comprises a plurality of rotating shaft bodies 3.1 connected to each other in sequence, one end of the rotating shaft body 3.1 is opened in a central symmetry manner with a plurality of connecting thread grooves 21, the surface of the other end of the rotating shaft body 3.1 is opened with connecting notches 22 corresponding to the thread grooves one-to-one, a connecting bolt 23 which can be screwed to the connecting thread groove 21 is provided in the connecting notch 22.The pivot axis 3 is adapted to be connected by the rotating shaft bodies 3.1, so that during operation, according to the length of the formwork and the actual number of formworks to be simultaneously lifted, a suitable number of rotating shaft bodies 3.1 can be selected for connection. At the same time, the connecting notch 22 is provided for receiving the connecting bolt 23, so that the connecting bolt 23 is located within the circumference of the rotating shaft body 3.1 without hindering the dismantling and mounting of the shaft sleeve 7.The outer end of the outermost rotating shaft body 3.1 is connected to an auxiliary support bracket 24, the auxiliary support bracket 24 comprising an open, downwardly bent U-shaped bracket 24.1, a support plate 24.2 vertically mounted in the upper center of the U-shaped bracket 24.1, and a support axle body 24.3 rotatably supported on the upper end of the support plate 24.2, the outer surface of the support axle body 24.3 being opened with support bracket notches 24.4 corresponding to the connection thread grooves 21 one-to-one, and provided with fastening bolts 24.5 disposed in the support bracket notches 24.4, wherein the end of the fastening bolt 24.5 facing the first shaft body penetrates the support axle body 24.3 and is screwed to the connection thread groove 21 in the rotating shaft body 3.1.By providing the auxiliary support bracket 24, the end of the rotating shaft 3 opposite from the chassis 1 can be supported, thereby improving the stability in lifting by the rotating shaft 3.The sliding rod 15 comprises several rod bodies 15.1 which are connected to each other in succession, wherein one end of the rod body 15.1 is firmly provided with a connection threaded post 25 and the other end of the rod body 15.1 is provided with a connection threaded groove 26 which can be screwed to the connection threaded post 25, an auxiliary support rod 27 is rotatably mounted on one side of the support plate 24.2, and the end of the auxiliary support rod 27 facing the chassis 1 is provided with a support threaded post 28 which can be fitted into the connection threaded groove 26. The slide rod 15 can be adjusted according to the number of the rotating shaft bodies 3.1. At the same time, the end of the slide rod 15 remote from the chassis 1 is also supported by the auxiliary support bracket 24 to improve stability.

Claims

An automatic hoisting truck for wet-seam formwork, characterized by comprising a chassis (1), wherein a winch (2) is attached to the top of the chassis (1), a rotary shaft (3) is rotatably attached to the front end of the chassis (1), a hoisting member (4) is attached to the rotary shaft (3), wherein the hoisting member (4) comprises a steel wire rope (5) wound around the rotary shaft (3) and a hook (6) attached to the free end of the steel wire rope (5), and the hook (6) is arranged at the center of the chassis (1) in the width direction, wherein at least two hoisting members (4) are attached to the rotary shaft (3), and the axial position of the hoisting member (4) is adjustable on the rotary shaft (3).The wet-joint formwork automatic hoisting truck according to claim 1, characterized in that the hoisting member (4) comprises a shaft sleeve (7), wherein the outside of the rotary shaft (3) is slidably sheathed by the shaft sleeve (7), the steel wire rope (5) is wound around the outside of the shaft sleeve (7), a positioning pin (8) is penetratingly provided at both ends of the outside of the shaft sleeve (7), respectively, and the rotary shaft (3) is opened with positioning holes (9) for inserting the positioning pins (8).The automatic lift truck for wet-joint formwork according to claim 2, characterized in that the positioning pin (8) comprises a first rod-shaped portion (8.1) with a smooth surface and a threaded portion (8.2) provided at one end of the first rod-shaped portion (8.1), wherein corresponding to each positioning pin (8) on both sides of the shaft sleeve (7) a pair of threaded bushes (10) is provided, which can be screwed to the threaded portion (8.2), and each pair of threaded bushes (10) lies on the same diameter line of the shaft sleeve (7), the inner diameter of the threaded bush (10) corresponds to the outer diameter of the first rod-shaped portion (8.1), and the outer end of the threaded bush (10) is provided with a through bore (11), which corresponds to the outer diameter of the first rod-shaped portion (8.1).Automatic lifting carriage for wet-joint formworks according to claim 3, characterised in that the length of the inner cavity of the threaded bushing (10) is designed to be greater than the length of the threaded section (8.2), and the positioning pin (8) comprises a second rod-shaped section (8.3) which is provided at an end of the threaded section (8.2) facing away from the first rod-shaped section (8.1), wherein the second rod-shaped section (8.3) is a rod-shaped structure with a smooth surface and the surface of the rotary shaft (3) is provided with an annular sliding groove (12), the width of which corresponds to the outer diameter of the second rod-shaped section (8.3), and the second rod-shaped section (8.3) can execute a circular movement in the annular sliding groove (12) after being released from the positioning bore (9).The wet-joint formwork automatic lift truck according to claim 3, characterized in that one end of the shaft sleeve (7) is fixedly sheathed by a ratchet wheel (13), a ratchet wheel block (14) is provided on one side of the ratchet wheel (13) to secure the shaft sleeve (7) against rotation in the direction of releasing the steel wire rope (5), a slide rod (15) is provided in parallel on one side of the rotation shaft (3), and a rod sleeve (16) is fixedly attached to the end of the ratchet wheel block (14) facing away from the shaft sleeve (7), and the rod sleeve (16) is slidably supported at one end on the outside of the slide rod (15), and a distance between the slide rod (15) and the rotation shaft (3) is larger than the length of the positioning pin (8).Automatic lifting carriage for wet-joint formworks according to claim 5, characterised in that the two positioning pins (8) on the shaft sleeve (7) are symmetrically distributed on both sides of the shaft sleeve (7), the outer side of the ratchet wheel block (14) is displaceably sheathed by a toothed sleeve (17), a spring (18) is provided in the toothed sleeve (17), which spring gives the toothed block elasticity so that it can move out of the toothed sleeve (17), and the rod sleeve (16) is fixedly attached to the end of the toothed sleeve (17) facing away from the toothed block.Automatic lifting carriage for wet-joint formworks according to claim 5, characterised in that the rod sleeve (16) is provided with a threaded bore (19) at an end facing away from the ratchet block (14), and a set screw (20) is screwed into the threaded bore (19), the inner end of which screw abuts the surface of the sliding rod (15).The wet-joint formwork automatic lift truck according to claim 5, characterized in that the rotating shaft (3) comprises a plurality of rotating shaft bodies (3.1) connected to each other in sequence, one end of the rotating shaft body (3.1) is opened in a central symmetry manner with a plurality of connection thread grooves (21), the surface of the other end of the rotating shaft body (3.1) is opened with connection notches (22) corresponding to the thread grooves one-to-one, a connection bolt (23) which can be screwed to the connection thread groove (21) is provided in the connection notch (22).The automatic lift truck for wet-seam formwork according to claim 8, characterized in that the outer end of the outermost rotating shaft body (3.1) is connected to an auxiliary support bracket (24), the auxiliary support bracket (24) comprising an open, downwardly bent U-shaped beam (24.1), a support plate (24.2) vertically mounted in the upper center of the U-shaped beam (24.1), and a support axle body (24.3) rotatably supported at the upper end of the support plate (24.2), the outer surface of the support axle body (24.3) is opened with support bracket notches (24.4) corresponding to the connection thread grooves (21) one-to-one, and provided with fastening bolts (24.5) disposed in the support bracket notches (24.4), wherein the end of the fastening bolt (24.5) facing the first shaft body penetrates the support axle body (24.3) and is screwed to the connection thread groove (21) in the rotating shaft body (3.1).The automatic lift truck for wet-joint formwork according to claim 9, characterized in that the sliding rod (15) comprises a plurality of rod bodies (15.1) connected one after the other, wherein one end of the rod body (15.1) is fixedly provided with a connection threaded post (25), and the other end of the rod body (15.1) is provided with a connection threaded groove (26) that can be screwed to the connection threaded post (25), an auxiliary support rod (27) is rotatably supported on one side of the support plate (24.2), and the end of the auxiliary support rod (27) facing the chassis (1) is provided with a support threaded post (28) that can be fitted into the connection threaded groove (26).

Images