Small hand-push crane with telescopic supporting legs

Abstract

The utility model belongs to the technical field of cranes, and particularly relates to a small hand-push crane with telescopic supporting legs, which comprises a frame, symmetrical universal trundles are arranged at the left end of the lower side wall of the frame, and symmetrical directional trundles are arranged at the right end of the lower side wall of the frame. The loading stability of the vehicle body is improved, the supporting area of the bottom of the vehicle body is enlarged, the maximum allowable weight of loaded heavy objects is greatly improved, the allowable operation range of the suspension arm is enlarged, the passing capacity of the whole vehicle is not affected when the supporting legs are retracted, the supporting leg sleeves and the vehicle frame are integrally arranged, the weight of the vehicle body is reduced, and the appearance size of the vehicle body is reduced. A telescopic supporting leg rapid lifting structure is adopted, the unfolding and recycling efficiency is improved, and rapid switching between hoisting operation and traveling transfer is achieved through the telescopic supporting legs which are rapidly unfolded and folded.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a hand-pushed small crane with telescopic outriggers. Background Technique

[0002] A small crane is a short-distance loading, unloading and transportation device often used at construction sites or production sites. For occasions where the object is heavy, not suitable for one or two people to carry, the site is narrow, the transportation distance is dozens to hundreds of meters, and the transportation path changes greatly, a hand-pushed small crane is a very convenient loading, unloading and transportation tool;

[0003] However, the existing small cranes still have the following technical problems when in use:

[0004] When hoisting heavy objects, the vehicle body is only supported by the bottom traveling wheels, and the stability of the vehicle body is relatively poor and it is easy to overturn; when hoisting heavy objects, the vehicle body is only supported by the bottom traveling wheels, and the area formed by this support point is small, thus limiting the weight range of the hoisted object; when hoisting heavy objects, due to the small support area formed by the bottom traveling wheels, when hoisting an object, the swinging range of the boom left and right is limited, thus limiting the operating range of the boom rotation when loading heavy objects.

[0005] Therefore, a hand-pushed small crane with telescopic outriggers is proposed to solve the above-mentioned problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a hand-pushed small crane with telescopic outriggers to solve the problems mentioned in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A hand-pushed small crane with telescopic outriggers, including a frame, symmetric universal casters are arranged at the left end of the lower side wall of the frame, symmetric directional casters are arranged at the right end of the lower side wall of the frame, a column is fixed on the upper side wall of the frame, a boom is arranged at the upper end of the column, a winch is fixed on the upper side wall of the boom, a lifting appliance is wound and arranged inside the winch, and the right end of the lifting appliance penetrates through the right end of the boom;

[0008] The side wall of the frame is slidably provided with evenly arranged telescopic outriggers. The telescopic outriggers include rectangular steel pipes, the rectangular steel pipes are slidably connected with the frame, a lifting screw is threaded on the side wall of the rectangular steel pipe, and a seat plate is arranged at the lower end of the lifting screw.

[0009] Preferably, a push-pull handrail is fixed at the left end of the upper side wall of the frame.

[0010] Preferably, the vehicle frame includes longitudinal beams, with an upper flat plate fixed to the right end inside the longitudinal beams, symmetric cross beams fixed to the left end inside the longitudinal beams, symmetric leg sleeves obliquely fixed to the side walls of the two cross beams, and symmetric wheel connection plates fixed to the left and right ends of the lower side wall of the longitudinal beams.

[0011] Preferably, a lifting device connection plate is commonly fixed to the upper side walls of the symmetric cross beams, and the column is fixedly connected to the cross beam through the lifting device connection plate.

[0012] Preferably, symmetric handrail connection plates are fixed to the left end of the upper surface of the longitudinal beams, and the push-pull handrail is fixedly connected to the upper surface of the longitudinal beams through the handrail connection plates.

[0013] Preferably, the rectangular steel pipe is slidably connected to the leg sleeve, insertion holes are formed in the side walls of the rectangular steel pipe and the leg sleeve, and a pin is commonly inserted into the two insertion holes.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] This application adopts retractable legs. When the legs are in the supporting state, it improves the loading stability of the vehicle body, expands the supporting area at the bottom of the vehicle body, greatly increases the maximum allowable weight of the loaded heavy objects, expands the allowable operation range of the boom. When the legs are retracted, it does not affect the passing ability of the whole vehicle. The leg sleeves and the vehicle frame are integrally arranged, reducing the weight of the vehicle body and the external dimensions of the vehicle body. The retractable leg quick lifting and lowering structure is adopted to improve the deployment and recovery efficiency. The quickly deployable and retractable legs are adopted to realize the quick switching between hoisting operations and driving and transferring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present novel when the legs are extended;

[0017] Figure 2 It is a schematic structural diagram of the present novel when the legs are retracted;

[0018] Figure 3 It is a schematic structural diagram of the retractable legs;

[0019] Figure 4 It is a schematic structural diagram of the vehicle frame.

[0020] In the figure: 1 sling, 2 boom, 3 winch, 4 directional caster, 6 column, 7 push-pull handrail, 8 swivel caster, 9 vehicle frame, 10 retractable legs, 10a rectangular steel pipe, 10b lifting screw, 10c seat plate, 11 pin, 9a wheel connection plate, 9b upper flat plate, 9c longitudinal beam, 9d leg sleeve, 9e cross beam, 9f lifting device connection plate, 9g handrail connection plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0023] Embodiment:

[0024] Please refer to Figures 1-4 , the present invention provides a technical solution:

[0025] A hand-pushed small crane with telescopic outriggers, including a vehicle frame 9. Symmetrical universal casters 8 are provided at the left end of the lower side wall of the vehicle frame 9, and symmetrical directional casters 4 are provided at the right end of the lower side wall of the vehicle frame 9. A column 6 is fixed to the upper side wall of the vehicle frame 9. A boom 2 is provided at the upper end of the column 6. A winch 3 is fixed to the upper side wall of the boom 2. A power output device is provided on the side wall of the winch 3 to enable the winch 3 to rotate. A lifting appliance 1 is wound inside the winch 3. The right end of the lifting appliance 1 passes through the right end of the boom 2. The lifting appliance 1 includes a steel wire rope and a hook, and a guide wheel is fixed to the upper side wall of the boom 2. The steel wire rope is slidably connected to the side wall of the guide wheel;

[0026] Telescopic outriggers 10 are slidably arranged on the side wall of the vehicle frame 9. The telescopic outriggers 10 include rectangular steel pipes 10a. The four rectangular steel pipes 10a are welded together with the longitudinal beam 9C and the cross beam 9e to form a vehicle frame 9 structure with sufficient structural strength and stiffness. The rectangular steel pipes 10a are slidably connected to the vehicle frame 9. A lifting screw 10b is threaded on the side wall of the rectangular steel pipe 10a. A seat plate 10c is provided at the lower end of the lifting screw 10b. The seat plate 10c is in direct contact with the ground, and the seat plate 10c can swing slightly to correct the uneven ground.

[0027] When the four telescopic outriggers 10 in the front, back, left, and right directions are fully retracted or fully extended, they can be locked with the bolt pins 11 to prevent displacement. When loading and transporting heavy objects, push the push-pull handrail 7 manually to move the small crane to the loading position. Pull out the bolt pin 11, extend each transverse outrigger 10, reinsert the bolt pin 11, and then lower each lifting screw 10b and stabilize the vehicle body. At this time, the boom 2 and the winch 3 of the lifting device can be operated to lift the heavy object with the lifting tool 1. If the heavy object needs to be transported over a short distance, the boom 2 can be rotated to place the heavy object at the front of the trolley and fix it. Then, retract the lifting screw 10b, retract the telescopic outriggers 10 and lock them with the bolt pins 11, push the trolley to the unloading position, extend the telescopic outriggers 10 again, and operate the winch 3, boom 2, and lifting tool 1 of the lifting device to unload the heavy object.

[0028] A push-pull handrail 7 is fixed to the left end of the upper side wall of the vehicle frame 9.

[0029] The vehicle frame 9 includes longitudinal beams 9c. The upper flat plate 9b is fixed to the right end inside the longitudinal beam 9c. Symmetrical cross beams 9e are fixed to the left end inside the longitudinal beam 9c. Symmetrical leg sleeves 9d are obliquely fixed to the side walls of the two cross beams 9e. Symmetrical wheel connecting plates 9a are fixed to the left end and the right end of the lower side wall of the longitudinal beam 9c. Four obliquely welded rectangular steel pipes 10a form the installation holes, guiding, and supporting structures for the telescopic outriggers 10. There is a small clearance fit between the inner wall of the rectangular steel pipe 10a and the outer wall of the telescopic outrigger 10.

[0030] The upper side walls of the symmetrical cross beams 9e are jointly fixed with a lifting device connecting plate 9f. The column 6 is fixedly connected to the cross beam 9e through the lifting device connecting plate 9f.

[0031] Symmetrical handrail connecting plates 9g are fixed to the left end of the upper surface of the longitudinal beam 9c. The push-pull handrail 7 is fixedly connected to the upper surface of the longitudinal beam 9c through the handrail connecting plates 9g.

[0032] The rectangular steel pipe 10a is slidably connected to the leg sleeve 9d. Jack holes are provided on the side walls of the rectangular steel pipe 10a and the leg sleeve 9d. A bolt pin 11 is inserted into the two jack holes. Before operating the telescopic outrigger 10, first pull out the bolt pin 11, then manually push the telescopic outrigger 10 to be fully extended or fully retracted, and then use the bolt pin 11 to lock the position of the telescopic outrigger 10 to prevent displacement.

[0033] A nut is welded to the top of the end of the rectangular steel pipe 10a, which cooperates with the lifting screw 10b. The seat plate 10c is installed at the lower end of the lifting screw 10b with bolts. The thread of the lifting screw 10b adopts two non-continuous sections in the middle to achieve the fast lifting and lowering operation of the lifting screw 10b.

[0034] When the hand-pushed small crane needs to perform a hoisting operation, first push the small crane to the operation site, select an appropriate position, then unfold the telescopic outriggers 10 and lock them with pins 11, lower the seat plate 10c to increase the support area and support stiffness of the small crane, and then carry out the hoisting. After the hoisting operation is completed, when the small crane needs to move, first lift the seat plate 10c, then retract the telescopic outriggers 10 and lock them with pins 11, which can reduce the overall vehicle outline size and improve the passing ability during driving.

[0035] Working principle:

[0036] When the small crane needs to be used, the rectangular steel pipe 10a can be slid out from the inside of the outrigger sleeve 9d. After extending to a certain position, the rectangular steel pipe 10a and the outrigger sleeve 9d are plugged and limited by the pin 11. By adjusting the lifting screw 10b, the lower seat plate 10c is made to contact the ground, thereby increasing the stability of the entire small crane. The winch 3 is driven to rotate by the power output device provided on the side wall of the winch 3, so as to unwind the steel wire rope, and the heavy object is suspended and lifted by the hook.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small push crane with telescopic outriggers, comprising a vehicle frame (9), characterized in that, On the left end of the lower side wall of the vehicle frame (9), symmetric universal casters (8) are provided. On the right end of the lower side wall of the vehicle frame (9), symmetric fixed casters (4) are provided. On the upper side wall of the vehicle frame (9), a column (6) is fixed. At the upper end of the column (6), a boom (2) is provided. On the upper side wall of the boom (2), a winch (3) is fixed. Inside the winch (3), a lifting appliance (1) is wound. The right end of the lifting appliance (1) penetrates through the right end of the boom (2). On the side wall of the vehicle frame (9), uniformly arranged telescopic legs (10) are slidably provided. The telescopic legs (10) include rectangular steel pipes (10a). The rectangular steel pipes (10a) are slidably connected to the vehicle frame (9). On the side wall of the rectangular steel pipe (10a), a lifting screw rod (10b) is threaded. At the lower end of the lifting screw rod (10b), a seat plate (10c) is provided.

2. The push-type small crane with telescopic outriggers according to claim 1, characterized in that: On the left end of the upper side wall of the vehicle frame (9), a push-pull handrail (7) is fixed.

3. The push trolley small crane with telescopic outriggers according to claim 2, characterized in that: The vehicle frame (9) includes longitudinal beams (9c). At the right end inside the longitudinal beam (9c), an upper flat plate (9b) is fixed. At the left end inside the longitudinal beam (9c), symmetric cross beams (9e) are fixed. On the side walls of the two cross beams (9e), symmetric leg sleeves (9d) are obliquely fixed. At the left end and the right end of the lower side wall of the longitudinal beam (9c), symmetric wheel connection plates (9a) are fixed.

4. The hand-pushed small crane with telescopic outriggers according to claim 3, characterized in that: On the upper side walls of the symmetric cross beams (9e), a hoisting device connection plate (9f) is jointly fixed. The column (6) is fixedly connected to the cross beam (9e) through the hoisting device connection plate (9f).

5. The trolley-mounted small crane with telescopic outriggers according to claim 3, wherein: On the left end of the upper surface of the longitudinal beam (9c), symmetric handrail connection plates (9g) are fixed. The push-pull handrail (7) is fixedly connected to the upper surface of the longitudinal beam (9c) through the handrail connection plates (9g).

6. The trolley-mounted small crane with telescopic outriggers according to claim 3, characterized in that: The rectangular steel pipe (10a) is slidably connected to the leg sleeve (9d). On the side walls of the rectangular steel pipe (10a) and the leg sleeve (9d), insertion holes are provided. Inside the two insertion holes, a pin (11) is jointly inserted.

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