Electric forward-moving counterweight type single-arm crane

Abstract

The utility model relates to an electric forward-moving counterweight type single-arm crane which comprises a frame assembly, a handle assembly and a power box are respectively arranged at the top of the tail side of the frame assembly, a forward-moving oil cylinder assembly is arranged on the frame assembly below the power box, and the front end of the forward-moving oil cylinder assembly is fixedly connected with a forward-moving support assembly. The two sides of a support plate of the forward moving support assembly are respectively provided with two forward moving idler wheels, the top of the forward moving support assembly is provided with the suspension arm assembly, the bottom of the frame assembly is respectively provided with an electric driving wheel and two steel core polyurethane trundles, and the materials are solid rubber and anti-skid pattern treads, so that the vehicle can be better suitable for being used in the outdoor environment. The electric travelling crane has the advantages of being flexible in operation, not limited by occasions and wide in application range. 2, the functions of rotating, forward moving and lifting can be flexibly realized, more possibilities are realized for lifting goods, and the working efficiency is improved;

Description

Technical Field

[0001] The utility model relates to a lifting device, in particular to an electric forward-moving counterweight type single-arm crane. Background Art

[0002] The single-arm crane in the field of lifting machinery is mainly composed of a column and a rotating boom, which is generally fixed on a concrete foundation and cannot be moved. The single-arm crane has a simple structure and is easy to operate. It is widely used in production lines such as factory workshops and mines. However, due to its fixed position and structural characteristics that it can only rotate, it is subject to usage restrictions in some occasions, such as when the lifting weight is not large, the boom length is short, the boom height is not high enough, etc., and its scope of application is not wide. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the defects and shortcomings of existing related products, an electric forward-moving counterweight single-arm crane is provided, which can move into some areas that are difficult for forklifts to enter for operation, and the boom can realize the functions of rotation, forward movement and lifting through the operation of the joystick.

[0004] The specific technical scheme of the utility model is: an electric forward-moving counterweight single-arm crane, including a frame assembly, a handle assembly, a forward-moving bracket assembly, a boom assembly, a telescopic cylinder assembly, a lifting cylinder assembly, a forward-moving cylinder assembly and a power box. The handle assembly and the power box are respectively installed on the top of the rear side of the frame assembly. The forward-moving cylinder assembly is installed on the frame assembly below the power box. The front end of the forward-moving cylinder assembly is fixedly connected to the forward-moving bracket assembly. Two forward-moving rollers are installed on both sides of the bracket plate of the forward-moving bracket assembly. The forward-moving rollers roll in cooperation with the U-shaped grooves of the frame side beams of the frame assembly and can slide freely on the side beams. The top of the forward-moving bracket assembly is equipped with a boom assembly, and the bottom of the frame assembly is equipped with an electric drive wheel and two steel-core polyurethane casters, which are made of solid rubber and have anti-skid patterned treads, and can better adapt to use in outdoor environments.

[0005] Furthermore, a slewing bearing is provided on the top of the forward support assembly, and a flange is provided on the bottom of the boom assembly. The flange is fixedly connected to the slewing bearing by bolts. The slewing bearing is driven by a hydraulic motor. When the hydraulic motor on the slewing bearing works, the overall bidirectional rotation function of the boom assembly can be realized. Two limit switches are installed on the slewing bearing to only allow the boom to rotate to a certain angle.

[0006] Furthermore, the boom assembly also includes a boom column, a main boom, an intermediate boom, and a small boom. The main boom, the intermediate boom, and the small boom are three telescopic square tubes of mutually matching sizes. The boom column is fixedly connected to the flange, the main boom is connected to the upper part of the boom column by a pin shaft, a hook is installed at the head of the intermediate boom, and the other end extends into the square tube of the main boom. A roller is installed at the lower extension of the head of the main boom and connected to the intermediate boom, which can effectively support the smooth movement of the intermediate boom. A hook is installed at the front end of the small boom, and the other end extends into the square tube of the intermediate boom. There are several through holes on the small boom, which can correspond to the through holes on the head of the intermediate boom respectively, and then connected by a positioning pin shaft, so as to facilitate manual operation to adjust the telescopic length of the small boom.

[0007] Furthermore, the boom assembly is also equipped with a telescopic cylinder assembly and a lifting cylinder assembly. The rear of the telescopic cylinder assembly is connected to the main boom through a pin shaft, and the head of the telescopic cylinder piston assembly is connected to the head of the middle boom through a pin shaft. The telescopic cylinder piston rod can move back and forth to achieve the front and back extension of the middle boom. The tail of the lifting cylinder assembly is connected to the lifting cylinder assembly at the lower part of the boom column through a pin shaft, and the head of the lifting cylinder assembly is connected to the main boom through a pin shaft. When the lifting cylinder piston rod moves back and forth, the lifting height of the entire boom can be changed.

[0008] Furthermore, the frame assembly is also equipped with extended legs on both sides through positioning pins, and an adjustment handle is also installed on the outside of the extended legs, and a support plate is installed at the bottom of the adjustment handle. When the vehicle moves, the extended legs are retracted toward the vehicle body and fixed by the positioning pins. When the single-arm crane starts working, it is necessary to extend the extended legs in advance, fix them with positioning pins, and then turn the adjustment handle until the support plate at the bottom of the adjustment screw contacts the ground to bear force.

[0009] The movement and steering of the entire vehicle are achieved by operating the accelerator knob on the large handle and turning the handle.

[0010] The three joysticks on the multi-way valve respectively control the reciprocating motion of the piston rods of the telescopic cylinder, the lifting cylinder and the forward cylinder.

[0011] The beneficial effects of the utility model are: 1. The equipment is electrically operated, flexible in operation, not limited by occasions, and has a wide range of applications. 2. It can flexibly realize the functions of rotation, forward movement, and lifting, providing more possibilities for lifting goods and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : It is a schematic diagram of the main structure of the boom assembly of the utility model without moving forward.

[0013] Figure 2 : It is a schematic diagram of the front structural view of the boom assembly of the utility model.

[0014] Figure 3: It is a schematic diagram of the structure of the boom assembly of the utility model when it is not moved forward.

[0015] Figure 4 : It is a schematic diagram of the forward-moving top view of the boom assembly of the utility model. DETAILED DESCRIPTION

[0016] The embodiments of the present utility model are described in conjunction with the accompanying drawings.

[0017] An electric forward-moving counterweight single-arm crane includes a frame assembly 1, a handle assembly 2, a forward-moving bracket assembly 3, a boom assembly 4, a telescopic cylinder assembly 5, a lifting cylinder assembly 6, a forward-moving cylinder assembly 7 and a power box 10. The handle assembly 2 and the power box 10 are respectively installed on the top of the rear side of the frame assembly 1. The forward-moving cylinder assembly 7 is installed on the frame assembly 1 below the power box 10. The front end of the forward-moving cylinder assembly 7 is fixedly connected to the forward-moving bracket assembly 3. Two forward-moving rollers 23 are installed on both sides of the bracket plate of the forward-moving bracket assembly 3. The forward-moving rollers 23 are rollingly matched with the U-shaped grooves of the frame side beams 25 of the frame assembly 1, and can slide freely on the side beams. The boom assembly 4 is installed on the top of the forward-moving bracket assembly 3, and an electric drive wheel 9 and two steel-core polyurethane casters 8 are respectively installed at the bottom of the frame assembly 1. The material is solid rubber and the anti-skid pattern tread can better adapt to use in outdoor environments.

[0018] A slewing bearing 18 is provided at the top of the forward support assembly 3, and a flange is provided at the bottom of the boom assembly 4. The flange is fixedly connected to the slewing bearing 18 by bolts. The slewing bearing 18 is driven by a hydraulic motor 19. When the hydraulic motor 19 on the slewing bearing works, the overall bidirectional rotation function of the boom assembly 4 can be realized. Two left and right limit switches are installed on the slewing bearing 18, which only allow the boom to rotate to a certain angle.

[0019] The boom assembly 4 also includes a boom column 11, a main boom 12, an intermediate boom 13, and a small boom 14. The main boom 12, the intermediate boom 13, and the small boom 14 are three telescopic square tubes of mutually matching sizes. The boom column 11 is fixedly connected to the flange, the main boom 12 is connected to the upper part of the boom column 11 by a pin 17, a hook is installed at the head of the intermediate boom 13, and the other end extends into the square tube of the main boom 12. A roller 16 is installed at the extension below the head of the main boom 12 and connected to the intermediate boom 13, which can effectively support the smooth movement of the intermediate boom 13. A hook is installed at the front end of the small boom 14, and the other end extends into the square tube of the intermediate boom 13. There are several through holes on the small boom 14, which can correspond to the through holes on the head of the intermediate boom 13 respectively, and then connected by a positioning pin 15, so as to facilitate manual operation to adjust the telescopic length of the small boom.

[0020] The boom assembly 4 is also equipped with a telescopic cylinder assembly 5 and a lifting cylinder assembly 6. The rear end of the telescopic cylinder assembly 5 is connected to the main boom 12 through a pin 17. The head of the telescopic cylinder piston assembly 5 is connected to the head of the intermediate boom 13 through a pin 17. The telescopic cylinder piston rod reciprocates to achieve the forward and backward extension of the intermediate boom. The rear end of the lifting cylinder assembly 6 is connected to the lifting cylinder assembly 6 at the lower part of the boom column 11 through a pin 17. The head of the lifting cylinder assembly 6 is connected to the main boom 12 through a pin 17. When the lifting cylinder piston rod reciprocates, the lifting height of the entire boom can be changed.

[0021] The two sides of the frame assembly 1 are also equipped with extended legs 20 through positioning pins, and the outer side of the extended legs 20 is also equipped with an adjustment handle 21, and the bottom of the adjustment handle 21 is equipped with a support plate 22. When the vehicle moves, the extended legs 20 are folded against the vehicle body and fixed by the positioning pins. When the single-arm crane starts working, it is necessary to extend the extended legs 20 in advance, fix them with positioning pins, and then turn the adjustment handle 21 until the support plate 22 at the bottom of the adjustment screw contacts the ground to bear force.

[0022] The movement and steering of the whole vehicle are accomplished by manipulating the accelerator knob on the large handle 26 and rotating the handle.

[0023] The three operating levers 27 on the multi-way valve respectively control the reciprocating motion of the piston rods of the telescopic cylinder, the lifting cylinder and the forward cylinder.

[0024] When in use, control the large handle 26 to move the boom vehicle to the side of the cargo to be hoisted, open the extended legs 20, fix them with the positioning pins, and then turn the adjustment handle 21 until the support plate 22 at the bottom of the adjustment screw contacts the ground. According to the required hoisting height of the cargo, adjust the length of the middle boom 13 through the telescopic cylinder assembly 5, then telescope the small boom 14 and then use the movable pin 15 to position it to adjust the overall boom length. After hooking the cargo with the hook, the lifting cylinder assembly 6 lifts the boom assembly 4 to lift the cargo, and then the slewing bearing 18 is driven by the hydraulic motor 19 to rotate the flange, and at the same time drives the boom assembly 4 to rotate to the loading vehicle, and repeat this process.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric forward-moving counterweight single-arm crane, characterized in that: The invention comprises a frame assembly (1), a handle assembly (2), a forward moving support assembly (3), a boom assembly (4), a telescopic cylinder assembly (5), a lifting cylinder assembly (6), a forward moving cylinder assembly (7) and a power box (10), wherein the handle assembly (2) and the power box (10) are respectively mounted on the top of the rear side of the frame assembly (1), and a forward moving cylinder assembly (7) is mounted on the frame assembly (1) below the power box (10), the front end of the forward moving cylinder assembly (7) is fixedly connected to the forward moving support assembly (3), two forward moving rollers (23) are respectively mounted on both sides of the support plate of the forward moving support assembly (3), and the forward moving rollers (23) are rollingly engaged with the U-shaped grooves of the frame side beams (25) of the frame assembly (1), the top of the forward moving support assembly (3) is mounted with a boom assembly (4), and the bottom of the frame assembly (1) is respectively mounted with an electric drive wheel (9) and two steel core polyurethane casters (8).

2. The electric forward-moving counterweight single-arm crane according to claim 1, characterized in that: A slewing bearing (18) is provided at the top of the forward support assembly (3), and a flange is provided at the bottom of the boom assembly (4). The flange and the slewing bearing (18) are fixedly connected by bolts. The slewing bearing (18) is driven by a hydraulic motor (19), and two left and right limit switches are installed on the slewing bearing (18).

3. The electric forward-moving counterweight single-arm crane according to claim 2, characterized in that: The boom assembly (4) further comprises a boom column (11), a main boom (12), an intermediate boom (13), and a small boom (14). The main boom (12), the intermediate boom (13), and the small boom (14) are three telescopic square tubes of mutually matching sizes. The boom column (11) is fixedly connected to a flange. The main boom (12) is connected to the upper part of the boom column (11) via a pin (17). A hook is installed at the head of the intermediate boom (13), and the other end thereof extends into the square tube of the main boom (12). A roller (16) is installed at the extension below the head of the main boom (12) and connected to the intermediate boom (13). A hook is installed at the front end of the small boom (14), and the other end thereof extends into the square tube of the intermediate boom (13). A plurality of through holes are provided on the small boom (14), which can correspond to the through holes on the head of the intermediate boom and then be connected via a positioning pin (15).

4. The electric forward-moving counterweight single-arm crane according to claim 3, characterized in that: The boom assembly (4) is also equipped with a telescopic cylinder assembly (5) and a lifting cylinder assembly (6); the rear end of the telescopic cylinder assembly (5) is connected to the main boom (12) via a pin shaft (17); the head of the telescopic cylinder assembly (5) is connected to the head of the intermediate boom (13) via a pin shaft (17); the rear end of the lifting cylinder assembly (6) is connected to the lifting cylinder assembly (6) at the bottom of the boom column (11) via a pin shaft (17); and the head of the lifting cylinder assembly (6) is connected to the main boom (12) via a pin shaft (17).

5. The electric forward-moving counterweight single-arm crane according to claim 1, characterized in that: Extended legs (20) are installed on both sides of the frame assembly (1) via positioning pins. An adjustment handle (21) is installed on the outside of the extended legs (20). A support plate (22) is installed at the bottom of the adjustment handle (21).

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