Folding arm crane provided with winding lifting mechanism

Abstract

A folding arm crane provided with a winding lifting mechanism is provided with a base, a rotating column installed on the base and an extending arm arranged at the top of the rotating column, and a variable-amplitude oil cylinder is correspondingly arranged between the rotating column and the extending arm in a matched mode; a winch fixing plate used for installing a winch is further fixedly arranged at the top end of the rotating column, a lifting hook connecting plate is further fixedly arranged at the head end of the movable portion of the extending arm, a lifting hook used for hooking is installed on the lifting hook connecting plate, the lifting hook is provided with a movable lifting hook and a fixed lifting hook, the movable lifting hook and the fixed lifting hook can be selected according to use scenes, and the fixed lifting hook is used for lifting goods under the conventional lifting condition. And when the goods need to be vertically lifted repeatedly, the winch is used for driving the movable lifting hook to lift the goods up and down, so that the working efficiency and the use performance of the product are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of folding arm cranes, in particular to a folding arm crane equipped with a hoisting mechanism. Background Art

[0002] The application of folding arm cranes in engineering construction is gradually increasing. They can effectively complete lifting tasks in the narrow spaces of factory buildings or under bridges, where mobile cranes cannot reach. Knuckle arm cranes are equipped with two luffing cylinders, which can achieve horizontal or vertical movement of cargo through the coordinated action of the two cylinders. Compared with mobile cranes that use hooks to lift cargo, this is an advantage. However, in special working conditions where only vertical lifting is required, this type of lifting efficiency is relatively slow.

[0003] The utility model with announcement number CN221607636U discloses a folding arm crane device, the key points of its technical solution include a folding arm crane body, a stabilizing device installed at the lower end of the folding arm crane body, the stabilizing device including: a counterweight balancing assembly, a fixing assembly, and a mobile load-bearing vehicle body, a placement frame is opened at the upper end of the mobile load-bearing vehicle body, the inner side of the fixing assembly is installed at the front and rear ends of the mobile load-bearing vehicle body, the inner side of the counterweight balancing assembly is installed on both sides of the mobile load-bearing vehicle body, and the lower end of the folding arm crane body is fixedly installed on the placement frame. The folding arm crane device mainly adjusts the weight by moving the counterweight weight by the counterweight balancing assembly, thereby avoiding the problem of offset and tipping of the folding arm crane body due to unstable weight at the lower end during operation. For special working conditions where only vertical lifting of goods is required, the lifting can only be performed by repeated movement.

[0004] In order to improve the lifting efficiency, a new lifting mechanism folding arm crane needs to be designed for lifting in multiple working conditions. Summary of the Invention

[0005] The purpose of the utility model is to address the deficiencies of the above-mentioned prior art and to provide a folding arm crane equipped with a hoisting mechanism, wherein the hoisting mechanism is installed on the side of the rotating column to achieve efficient construction of repeated hoisting operations.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A folding arm crane equipped with a hoisting mechanism comprises a base, a rotating column mounted on the base, and an extension arm provided on the top of the rotating column, wherein a luffing cylinder is provided between the rotating column and the extension arm;

[0008] A winch fixing plate for installing a winch is also fixed on the top of the rotating column, and the winch is installed on the winch fixing plate. A hook connecting plate is also fixed on the movable head end of the extension arm, and a hook for hooking is installed on the hook connecting plate.

[0009] The hook includes a movable hook or a fixed hook;

[0010] The fixed hook is detachably fixed to the hook connecting plate;

[0011] The movable hook is installed on a pulley device arranged on a hook connecting plate, and a steel wire rope is connected above the movable hook and passes through the pulley device and is wound on a winch.

[0012] The pulley device comprises a pulley frame and a pulley rotatably mounted on the bottom of the pulley frame. The steel wire rope slides through the pulley and is fixedly connected to a movable hook at the bottom.

[0013] The extension arm comprises an inner arm, a basic arm and a movable arm which are connected in sequence, and the inner arm is rotatably fixed on the top of the rotating column;

[0014] The luffing cylinder includes an upper luffing cylinder and a lower luffing cylinder, wherein the fixed end of the upper luffing cylinder is fixed to the inner arm, and the movable end of the upper luffing cylinder is hinged to the basic arm;

[0015] The fixed end of the lower luffing cylinder is fixed to the rotating column, and the movable end of the lower luffing cylinder is hinged to the inner arm;

[0016] The upper luffing cylinder and the lower luffing cylinder cooperate to realize the telescopic rotation of the extension arm.

[0017] A rope wedge is also fixedly provided at the end of the steel wire rope, and the movable hook is connected to the rope wedge through a provided pin shaft.

[0018] The winch and the movable hook are arranged on the same side of the inner arm.

[0019] The hook connecting plate is welded and fixed on the front end of the movable arm.

[0020] The beneficial effects of the utility model are:

[0021] (1) A folding arm crane equipped with a winch lifting mechanism is provided with a base, a rotating column installed on the base and an extension arm provided on the top of the rotating column, and a variable-length oil cylinder is provided between the rotating column and the extension arm; a winch fixing plate for installing a winch is also fixed on the top of the rotating column, and a hook connecting plate is also fixed on the movable end of the extension arm, and a hook for hooking is installed on the hook connecting plate, which can be installed with a movable hook or a fixed hook, which can be selected according to the use scenario. In conventional lifting situations, a fixed hook is used to lift goods. When it is necessary to lift goods vertically repeatedly, a winch is used to drive the movable hook to lift goods up and down, thereby improving the working efficiency and the performance of the product.

[0022] (2) The folding arm crane equipped with a winch lifting mechanism is equipped with a movable hook. When the cargo needs to be lifted vertically repeatedly, the wire rope of the winch mechanism is connected to the movable hook through the pulley seat, and the cargo is lifted with the movable hook, which improves the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 It is a structural diagram of the rotating column;

[0025] Figure 3 It is a structural diagram of the movable arm;

[0026] Figure 4 It is a schematic diagram of the structure of a folding arm crane with a fixed hook;

[0027] Figure 5 This is a schematic diagram of the structure of a folding arm crane with a movable hook;

[0028] Figure 6 It is a structural diagram of a fixed hook;

[0029] Figure 7 It is a structural diagram of a movable hook. DETAILED DESCRIPTION

[0030] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0031] The utility model provides a folding arm crane equipped with a hoisting mechanism, such as Figures 1 to 7 shown.

[0032] A folding arm crane equipped with a winch lifting mechanism includes a base 1, a rotating column 2 installed on the base 1, and an extension arm provided on the top of the rotating column 2, and a variable-length oil cylinder is correspondingly provided between the rotating column 2 and the extension arm; a winch fixing plate 201 for installing a winch 8 is also fixed to the top of the rotating column 2, and a hook connecting plate 701 is also fixed to the head end of the movable part of the extension arm, and a hook for hooking is installed on the hook connecting plate 701.

[0033] The hook can be installed with a movable hook 13 or a fixed hook 9, which can be selected according to the usage scenario; the fixed hook 9 can be detachably fixed to the hook connecting plate 701; and the movable hook 13 is installed on a pulley device provided on the hook connecting plate 701, and a steel wire rope is connected above the movable hook 13 and passes through the pulley device and is wound on the winch 8.

[0034] The pulley device includes a pulley frame 10 and a pulley 11 rotatably mounted at the bottom of the pulley frame 10. The wire rope slides through the pulley 11 and is fixed on a rope wedge 12, and the rope wedge 12 is hinged to a movable hook 13 through a provided pin shaft.

[0035] More specifically, the extension arm comprises an inner arm 4, a base arm 6, and a movable arm 7, which are connected in sequence. The inner arm is rotatably fixed to the top of the rotating column, and a hook connecting plate 701 is welded and fixed to the front end of the movable arm 7. The luffing cylinders correspondingly include an upper luffing cylinder 5 and a lower luffing cylinder 3. The fixed end of the upper luffing cylinder 5 is fixed to the inner arm 4, and the movable end of the upper luffing cylinder 5 is hinged to the movable arm 7; the fixed end of the lower luffing cylinder 3 is fixed to the rotating column 2, and the movable end of the lower luffing cylinder 3 is hinged to the inner arm 4. The upper and lower luffing cylinders cooperate to achieve the telescopic rotation of the extension arm.

[0036] Preferably, the winch 8 and the movable hook 13 are arranged on the same side of the inner arm 4, which can ensure that the wire rope of the winch 8 can smoothly reach the pulley 11.

[0037] When the operator needs to lift the cargo, the winch 8 is not used in the normal state, and the movement of the fixed hook 9 is realized by operating the coordinated action of the lower luffing cylinder 3 and the upper luffing cylinder 5. Figure 4 As shown, the goods are transported from one place to another.

[0038] Under special working conditions, when the same type of cargo needs to be lifted vertically repeatedly, it becomes very troublesome to operate the coordinated actions of the lower luffing cylinder 3 and the upper luffing cylinder 5. Each action takes a long time and the working efficiency is very low. It is necessary to use the winch 8 to retract and release the wire rope to pull the movable hook 13 to lift the cargo.

[0039] like Figure 5 The figure shows a folding arm crane operating with a movable hook. The winch 8 is mounted on the winch fixing plate 201 on the rotating column 2, the pulley frame 10 is mounted on the hook connecting plate 701, and the pulley 11 is mounted on the pulley frame 10. The rope wedge 12 is fixed to the end of the wire rope of the winch 8, and the movable hook 13 is connected to the rope wedge 12 via a pin. The winch 8 and the movable hook 13 are both on the same side of the inner arm 4, allowing the wire rope of the winch 8 to reach the pulley 11 smoothly. When lifting cargo, the lower and upper luffing cylinders 3 and 5 do not need to be extended or retracted. The winch 8 rotates to retract and release the wire rope, pulling the movable hook 13 to achieve the up and down movement, improving operating efficiency.

[0040] If the words "first" and "second" are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0041] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0042] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

Claims

1. A folding arm crane equipped with a hoisting mechanism, characterized in that: It includes a base, a rotating column installed on the base, and an extension arm provided on the top of the rotating column, and a variable amplitude oil cylinder is provided between the rotating column and the extension arm; A winch fixing plate for installing a winch is also fixed on the top of the rotating column, and the winch is installed on the winch fixing plate. A hook connecting plate is also fixed on the movable head end of the extension arm, and a hook for hooking is installed on the hook connecting plate.

2. A folding arm crane equipped with a hoisting mechanism according to claim 1, characterized in that: The hook includes a movable hook or a fixed hook; The fixed hook is detachably fixed to the hook connecting plate; The movable hook is installed on a pulley device arranged on a hook connecting plate, and a steel wire rope is connected above the movable hook and passes through the pulley device and is wound on a winch.

3. A folding arm crane equipped with a hoisting mechanism according to claim 2, characterized in that: The pulley device comprises a pulley frame and a pulley rotatably mounted on the bottom of the pulley frame. The steel wire rope slides through the pulley and is fixedly connected to a movable hook at the bottom.

4. A folding arm crane equipped with a hoisting mechanism according to claim 2, characterized in that: The extension arm comprises an inner arm, a basic arm and a movable arm which are connected in sequence, and the inner arm is rotatably fixed on the top of the rotating column; The luffing cylinder includes an upper luffing cylinder and a lower luffing cylinder, wherein the fixed end of the upper luffing cylinder is fixed to the inner arm, and the movable end of the upper luffing cylinder is hinged to the basic arm; The fixed end of the lower luffing cylinder is fixed to the rotating column, and the movable end of the lower luffing cylinder is hinged to the inner arm; The upper luffing cylinder and the lower luffing cylinder cooperate to realize the telescopic rotation of the extension arm.

5. The folding arm crane equipped with a hoisting mechanism according to claim 3, characterized in that: A rope wedge is also fixedly provided at the end of the steel wire rope, and the movable hook is connected to the rope wedge through a provided pin shaft.

6. The folding arm crane equipped with a hoisting mechanism according to claim 2, characterized in that: The winch and the movable hook are arranged on the same side of the inner arm.

7. The folding arm crane equipped with a hoisting mechanism according to claim 4, characterized in that: The hook connecting plate is welded and fixed on the front end of the movable arm.

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