Lifting and folding device of self-walking crane

Abstract

The invention belongs to the technical field of crane equipment, and particularly relates to a lifting and folding device of a self-walking crane, which comprises a body, one side of the top of the body is rotatably connected with a rotating rod, the other side in the body is rotatably connected with a hydraulic push rod I, and the output end of the hydraulic push rod I is rotatably connected to one side of the outer wall of the rotating rod; a first telescopic rod is slidably connected into the rotating rod. A second telescopic rod is slidably connected into the first telescopic rod. A motor is fixedly connected into the rotating rod, a lead screw is fixedly connected to the output end of the motor, and the lead screw is in threaded connection to one end in the first telescopic rod; first racks are fixedly connected to the two sides of the interior of the rotating rod, gears are rotationally connected to the two sides of the first telescopic rod, the first racks are meshed with the gears, second racks are fixedly connected to the two sides of the outer wall of the second telescopic rod, the gears are meshed with the second racks, and a lifting assembly is arranged on the outer wall of the front end of the second telescopic rod.

Description

Technical Field

[0001] The invention belongs to the technical field of crane equipment and relates to a lifting and folding device of a self-propelled crane. Background Art

[0002] Self-propelled cranes are usually a type of lifting equipment that can move on its own without external support. They are usually used in various industrial and construction sites to transport and lift heavy objects. Most self-propelled cranes are equipped with a lifting and folding mechanism, the purpose of which is to better retract and fold the equipment, thereby reducing the space occupied by the self-propelled crane during transportation.

[0003] The patent with the announcement number CN207844925U discloses a free-walking small crane, including a base frame beam, a column and a lifting boom. The bottom of the base frame beam is equipped with a universal walking wheel, and the top is equipped with an annular counterweight block; the hollow part of the annular counterweight block is equipped with a slewing assembly; the column is plugged into the slewing assembly, and the other end of the column is connected to the lifting boom; the inner side of the lifting boom is provided with a luffing rope, the luffing rope is connected to the luffing winch, and the other end of the luffing rope passes through the electric hoist and is connected to the lifting hook; the crane is lifted by the universal walking wheel. Move to the place where the work is needed, then lock the universal traveling wheel and carry out the lifting operation. The electric hoist is responsible for lifting, and the luffing winch controls the luffing of the electric hoist through the luffing rope. The 360-degree rotation of the small crane is controlled by the slewing assembly. It can easily solve the problem of difficult transportation of components and accessories in a small site, improve construction efficiency, and save a lot of manpower, material and financial resources. The self-propelled crane in this application occupies too much space when moving or transporting, which makes it inconvenient to enter some small places, resulting in its lack of applicability. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a lifting and folding device for a self-propelled crane, aiming to improve the problem that the existing self-propelled crane occupies too much space when moving or transporting, making it inconvenient to enter some small places.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A lifting and folding device for a self-propelled crane comprises a body, wherein one side of the top of the body is rotatably connected to a rotating rod, and the other side of the body is rotatably connected to a hydraulic push rod 1, the output end of the hydraulic push rod 1 is rotatably connected to one side of the outer wall of the rotating rod, the rotating rod is slidably connected to a telescopic rod 1, and the telescopic rod 1 is slidably connected to an telescopic rod 2; an electric motor is fixedly connected to the rotating rod, and the output end of the motor is fixedly connected to a screw rod, and the screw rod is threadedly connected to one end of the telescopic rod 1; rack 1 is fixedly connected to both sides of the rotating rod, and gears are rotatably connected to both sides of the telescopic rod 1, the rack 1 is meshed with the gear, and rack 2 is fixedly connected to both sides of the outer wall of the telescopic rod 2, the gear is meshed with the rack 2, and a lifting assembly is provided on the outer wall of the front end of the telescopic rod 2.

[0007] Furthermore, the lifting assembly includes a lifter and a lifting wheel, one side of the outer wall of the lifter is fixedly connected to the second outer wall of the telescopic rod, and the lifting wheel is arranged at the bottom of the lifter.

[0008] Furthermore, the outer walls on both sides of the vehicle body are rotatably connected with wheels.

[0009] Furthermore, a rotating column is rotatably connected inside the vehicle body, and a worm gear is fixedly connected to the bottom of the rotating column.

[0010] Furthermore, a double-headed motor is fixedly connected to the interior of the vehicle body, a worm is fixedly connected to the output end of the double-headed motor, and the worm is meshed with the worm wheel.

[0011] Furthermore, a double-headed motor is fixedly connected inside the vehicle body, a worm is fixedly connected to the output end of the double-headed motor, the worm is horizontally arranged, and the worm is meshed with the worm wheel.

[0012] Furthermore, an extension rod is fixedly connected to the top of the outer wall of the rotating column, the extension rod is horizontally arranged, and a vertically arranged support rod is fixedly connected to one side of the extension rod.

[0013] Furthermore, a second hydraulic push rod is fixedly connected inside the support rod, and an output end of the second hydraulic push rod is fixedly connected to a base.

[0014] Furthermore, the base is slidably connected to the inside of the support rod and is inserted into the inside of the support rod.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, the gear inside the telescopic rod 1 rolls on the rack 1, driving the movement of the rack 2, so that the rack 2 drives the telescopic rod 2 to slide out of the telescopic rod 1, thereby realizing the telescopic and folding of the mechanism, solving the problem that the self-propelled crane occupies too much space when moving or transporting, and improving the convenience of transportation of the crane.

[0017] 2. In the present invention, the double-headed motor controls the rotation of the worms on both sides, drives the worm wheel and then drives the rotating column to rotate, so that the extension rod extends out of the top of the vehicle body. The second hydraulic push rod controls the base to extend out of the support rod, making the crane operation more stable, solving the problem of instability of the self-propelled crane during operation, and improving the stability of the crane operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of a lifting and folding device of a self-propelled crane of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of a rotating rod of a lifting and folding device of a self-propelled crane of the present invention;

[0020] Figure 3 A schematic diagram of the internal structure of a vehicle body of a lifting and folding device of a self-propelled crane of the present invention;

[0021] Figure 4 The present invention is a schematic diagram of the internal structure of a support rod of a lifting and folding device of a self-propelled crane.

[0022] In the figure: 1. body; 2. wheel; 3. rotating rod; 4. hydraulic push rod 1; 5. lifting device; 6. lifting wheel; 7. support rod; 8. telescopic rod 1; 9. telescopic rod 2; 10. screw; 11. rack 1; 12. gear; 13. rack 2; 14. motor; 15. worm; 16. worm wheel; 17. rotating column; 18. extension rod; 19. double-headed motor; 20. hydraulic push rod 2; 21. base. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0024] Reference Figure 1 and Figure 2, an embodiment provided by the present invention: a lifting and folding device of a self-propelled crane, comprising a body 1, a rotating rod 3 is rotatably connected to one side of the top of the body 1, a hydraulic push rod 4 is rotatably connected to the other side of the body 1, the output end of the hydraulic push rod 4 is rotatably connected to one side of the outer wall of the rotating rod 3, a telescopic rod 8 is slidably connected to the inside of the rotating rod 3, and a telescopic rod 2 9 is slidably connected to the inside of the telescopic rod 8; a motor 14 is fixedly connected to the inside of the rotating rod 3, a screw rod 10 is fixedly connected to the output end of the motor 14, and the screw rod 10 is threadedly connected to one end of the inside of the telescopic rod 8; racks 11 are fixedly connected to both sides of the rotating rod 3, gears 12 are rotatably connected to both sides of the telescopic rod 8, the racks 11 are meshed with the gears 12, racks 2 13 are fixedly connected to both sides of the outer wall of the telescopic rod 2 9, and the gears 12 are meshed with the racks 2 13;

[0025] Specifically, when it is necessary to control the extension and retraction of the crane, the hydraulic push rod 14 will push the rotation of the rotating rod 3 in a specific way. This rotation enables the rotating rod 3 to be propped up or put down, thereby changing the height and position of the crane. Inside the rotating rod 3, there is a motor 14, which can drive the screw rod 10 to rotate. The rotation of the screw rod 10 will drive the telescopic rod 18 to slide out of the rotating rod 3. This sliding action enables the crane to expand or contract, thereby adapting to different work requirements. Furthermore, the gear 12 inside the telescopic rod 8 will roll on the rack 11, and this rolling action will drive the movement of the rack 2 13, and the movement of the rack 2 13 will drive the telescopic rod 2 9 to slide out of the interior of the telescopic rod 8. This design makes the crane have higher stability and accuracy during the extension and retraction process. Through the coordinated work of these components, the self-propelled crane can realize the function of telescopic folding, which makes the crane more flexible and efficient when performing tasks, and also greatly improves its adaptability and practicality.

[0026] Reference Figure 1 A lifting assembly is provided on one side of the outer wall of the telescopic rod 29, and the lifting assembly includes a lifting device 5 and a lifting wheel 6. One side of the outer wall of the lifting device 5 is fixedly connected to one side of the outer wall of the telescopic rod 29, and the lifting wheel 6 is arranged at the bottom of the lifting device 5. The outer walls on both sides of the vehicle body 1 are rotatably connected to the wheels 2;

[0027] Specifically, a hoist 5 is provided on the top of the telescopic rod 29, and the hoist 5 can control the lifting and lowering of the lifting wheel 6 to facilitate the operation of the crane. A plurality of wheels 2 are provided on the body 1, which can effectively support the crane and drive it to move.

[0028] Reference Figure 3 and Figure 4, the body 1 is rotatably connected with four rotating columns 17, which are symmetrically arranged and respectively located on both sides of the rotating rod 3 and the hydraulic push rod 1 4. A worm gear 16 is fixedly connected to the bottom of the rotating column 17, and a double-headed motor 19 is fixedly connected to the body 1. A worm 15 is fixedly connected to the output end of the double-headed motor 19. The worm 15 is horizontally arranged, and the worm 15 is meshed with the worm gear 16. An extension rod 18 is fixedly connected to the top of the outer wall of the rotating column 17, and a support rod 7 is fixedly connected to one side of the extension rod 18. A hydraulic push rod 20 is fixedly connected to the inside of the support rod 7, and a base 21 is fixedly connected to the output end of the hydraulic push rod 20. The base 21 is slidably connected to the inside of the support rod 7 and is stuck in the inside of the support rod 7;

[0029] Specifically, when the crane is in operation, the worm gears 15 on both sides start to rotate under the control of the double-headed motor 19 . The rotation of the worm 15 drives the rotation of the worm wheel 16, which further drives the rotation of the rotating column 17. As the rotating column 17 rotates, the extension rod 18 gradually extends from the top of the vehicle body 1. At this time, the hydraulic push rod 20 begins to play a role. It controls the base 21 to extend out of the support rod 7, providing a stable support for the crane. This design makes the crane more stable during operation and can cope with various complex environments and conditions. The design of the transmission system such as the double-headed motor 19 and the worm 15, the worm wheel 16, and the rotating column 17 enables the crane to achieve precise positioning and stable operation. At the same time, the design of the hydraulic push rod 20 and the base 21, the support rod 7, etc. provides strong support and stability for the crane, ensuring the safety and efficiency of the operation. In addition, this crane also has high flexibility and adaptability. By adjusting the speed of the double-headed motor 19 and the pressure of the hydraulic push rod 20, precise control of the lifting weight can be achieved. At the same time, the crane has a compact structure and is easy to operate, and can adapt to various different working environments and conditions.

[0030] Working principle: when the self-propelled crane is extended or retracted, the hydraulic push rod 14 can be controlled to control the rotation of the rotating rod 3, so that the rotating rod 3 can be propped up and lowered. An electric motor 14 is arranged inside the rotating rod 3, and the electric motor 14 can drive the screw rod 10 to rotate, so that the screw rod 10 drives the telescopic rod 18 to slide out of the rotating rod 3. At the same time, the gear 12 inside the telescopic rod 8 will roll on the rack 11, so that the rolling of the gear 12 drives the movement of the rack 2 13, so that the rack 2 13 drives the telescopic rod 2 9 to slide out of the telescopic rod 18, so that the telescopic folding of the mechanism can be realized. When the crane is operating, the double-headed motor 19 can control the rotation of the worm 15 on both sides, so that the worm 15 drives the worm wheel 16 to rotate, and then the worm wheel 16 drives the rotating column 17 to rotate, so that the extension rod 18 extends out of the top of the vehicle body 1, and the hydraulic push rod 2 20 can control the base 21 to extend out of the support rod 7, so that the operation of the crane is more stable.

Claims

1. A lifting and folding device for a self-propelled crane, comprising a vehicle body (1), characterized in that: One side of the top of the vehicle body (1) is rotatably connected to a rotating rod (3), and the other side of the interior of the vehicle body (1) is rotatably connected to a hydraulic push rod (4), and the output end of the hydraulic push rod (4) is rotatably connected to one side of the outer wall of the rotating rod (3). The interior of the rotating rod (3) is slidably connected to a telescopic rod (8), and the interior of the telescopic rod (8) is slidably connected to a telescopic rod (9); the interior of the rotating rod (3) is fixedly connected to an electric motor (14), and the output end of the electric motor (14) is fixedly connected to a screw rod (10 ), the screw rod (10) is threadedly connected to one end of the telescopic rod (8); racks (11) are fixedly connected to both sides of the rotating rod (3), gears (12) are rotatably connected to both sides of the telescopic rod (8), the racks (11) are meshed with the gears (12), the outer walls of the telescopic rod (9) are fixedly connected to the racks (13), the gears (12) are meshed with the racks (13), and a lifting assembly is arranged on the outer wall of the front end of the telescopic rod (9).

2. The lifting and folding device of a self-propelled crane according to claim 1, characterized in that: The lifting assembly comprises a lifting device (5) and a lifting wheel (6); one side of the outer wall of the lifting device (5) is fixedly connected to the outer wall of the second telescopic rod (9); and the lifting wheel (6) is arranged at the bottom of the lifting device (5).

3. The lifting and folding device of a self-propelled crane according to claim 1, characterized in that: The outer walls on both sides of the vehicle body (1) are rotatably connected to wheels (2).

4. The lifting and folding device of a self-propelled crane according to claim 1, characterized in that: The vehicle body (1) is internally rotatably connected with four rotating columns (17), which are symmetrically arranged and respectively located on both sides of the rotating rod (3) and the hydraulic push rod (4), and the bottom of the rotating column (17) is fixedly connected with a worm gear (16).

5. The lifting and folding device of a self-propelled crane according to claim 4, characterized in that: A double-headed motor (19) is fixedly connected inside the vehicle body (1), a worm (15) is fixedly connected to the output end of the double-headed motor (19), the worm (15) is arranged horizontally, and the worm (15) is meshed with the worm wheel (16).

6. The lifting and folding device of a self-propelled crane according to claim 5, characterized in that: An extension rod (18) is fixedly connected to the top of the outer wall of the rotating column (17); the extension rod (18) is arranged horizontally, and one side of the extension rod (18) is fixedly connected to a vertically arranged support rod (7).

7. The lifting and folding device of a self-propelled crane according to claim 6, characterized in that: A second hydraulic push rod (20) is fixedly connected inside the support rod (7), and a base (21) is fixedly connected to the output end of the second hydraulic push rod (20).

8. The lifting and folding device of a self-propelled crane according to claim 7, characterized in that: The base (21) is slidably connected to the inside of the support rod (7) and is inserted into the inside of the support rod (7).

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