Extension arm for crane

Abstract

The utility model relates to the field of cranes, in particular to an extension arm for a crane. The utility model provides an extension arm for a crane, which aims at a small-sized vehicle-mounted crane and has a stabilizing effect, the extension arm comprises a mounting plate, a base, a machine arm, an extension arm, a connecting arm, a support rod, a telescopic rod, a spring and a support frame, the base is arranged at the top of the mounting plate, the machine arm is rotationally arranged on the base, the extension arm is arranged on the machine arm in a sliding manner, and the connecting arm is arranged on the support frame. A connecting arm is arranged at the upper end of the extension arm, a supporting rod is hinged to the base, a telescopic rod is arranged in the supporting rod in a sliding mode, a spring is arranged between the telescopic rod and the supporting rod, the front end of the telescopic rod is connected with the bottom of the machine arm in a hinged mode, and supporting frames are arranged on the two sides of the mounting plate in a sliding mode. According to the utility model, the supporting frame is unfolded and matched with the weight bearing block, so that the effect of increasing the weight of the mounting plate and the base is realized, and the chassis achieves a more stable effect.

Description

Technical Field

[0001] The utility model relates to the field of cranes, and in particular to an extension arm for a crane. Background Art

[0002] A crane is a piece of mechanical equipment widely used in construction sites, ports, warehouses and other places where heavy material handling is required. It lifts, moves and places heavy objects through one or more hooks, cables and pulley systems. There are many types of cranes, each with its specific design and purpose.

[0003] Common ones include truck cranes, which are cranes installed on truck chassis. They can be quickly moved to different work locations and are suitable for operations that require frequent changes in work locations. In order to expand their operating range, extension arms are usually installed on the cranes to enable them to reach a farther and higher operating range. The extension arms need to be extended during use. When they are extended, the length of the arms will increase accordingly, making the entire crane appear to be extended forward. For smaller cranes, most of them are fixed and supported by the chassis. However, with only the support of the chassis, it is still easy to have an unstable center of gravity, which in turn leads to the risk of stability imbalance.

[0004] Therefore, in order to solve the above problems, a crane extension arm having a stabilizing effect is proposed for a small vehicle-mounted crane. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings in the prior art, the utility model provides an extension arm for a crane with a stabilizing effect and is aimed at a small vehicle-mounted crane.

[0006] In order to solve the above technical problems, the utility model provides an extension arm for a crane, comprising a mounting plate, a base, an arm, an extension arm, a connecting arm, a support rod, a telescopic rod, a spring, a support frame and a weight block. The base is arranged on the top of the mounting plate, the arm is rotatably arranged on the top of the base, the extension arm is slidably arranged in the arm, the connecting arm is arranged at the upper end of the extension arm, the support rod is hingedly arranged on the base, the telescopic rod is slidably arranged in the support rod, a spring is arranged between the telescopic rod and the support rod, the front end of the telescopic rod is hingedly connected to the bottom of the arm, two support frames are provided, and the two support frames are respectively slidably arranged on both sides of the mounting plate, two weight blocks are provided, and the two weight blocks are both arranged on the outward end surface of the support frame.

[0007] Preferably, it also includes a pull rope, a winding wheel and a clamping block. The winding wheel is rotatably arranged on the top of the machine arm, the pull rope is arranged on the winding wheel in a winding manner, the pull rope and the winding wheel are in a reel-type cooperation, the clamping block is arranged at the lower end of the pull rope, the clamping block passes through the mounting plate and the inward end of the two support frames, and the three are in a clamping cooperation.

[0008] Preferably, a dust cover is also included, which is arranged on the top rear side of the mounting plate and is surrounded above the card block.

[0009] Preferably, a mounting block is further included, and the mounting block is rotatably arranged at the bottom end of the connecting arm.

[0010] Preferably, a guide plate is further included, and the guide plate is rotatably arranged on the rear side of the mounting block.

[0011] Preferably, it also includes a connecting rod and a guide plate, wherein two connecting rods are provided, and the two connecting rods are arranged on both sides of the machine arm, and the guide plate is arranged between the two connecting rods on the same side.

[0012] Preferably, the guide plate is streamlined.

[0013] Beneficial effects: 1. The utility model realizes the effect of increasing the weight of the mounting plate and the base by unfolding the support frame and then cooperating with the weight block, so that the chassis achieves a more stable effect;

[0014] 2. The utility model clamps the position of the mounting plate and the support frame by means of a clamping block, so that the support frame remains in a fixed state when not in use, thereby preventing it from moving, thereby achieving the effect of stabilizing the position of the support frame;

[0015] 3. The utility model installs various clamps and hooks through the installation block, so that the installation of such parts is convenient, and the direction of the heavy object is guided by the guide plate, so that the direction of the heavy object when loading is more effectively controlled;

[0016] 4. The utility model guides the wind flow through the guide plate, so that the device can achieve the effect of slowing down the wind speed when dealing with extremely strong wind weather, thereby ensuring the safe use of the device in this situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the extension arm, connecting arm, support rod and other parts of the utility model.

[0019] Figure 3 It is a schematic cross-sectional view of the supporting rod, telescopic rod, spring and other components of the utility model.

[0020] Figure 4 This is a schematic diagram of the use status of components such as the mounting plate, support frame and load-bearing block of the utility model.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the components such as the machine arm, connecting rod and guide plate of the utility model.

[0022] The marks in the accompanying drawings are: 1-mounting plate, 101-dust cover, 2-base, 3-machine arm, 4-extension arm, 5-connecting arm, 6-support rod, 7-telescopic rod, 8-spring, 9-pull rope, 91-winding wheel, 10-block, 11-support frame, 12-weight block, 13-mounting block, 14-guide plate, 15-connecting rod, 16-drainage plate. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Embodiment: An extension arm for a crane, such as Figure 1-Figure 5 As shown, it includes a mounting plate 1, a base 2, an arm 3, an extension arm 4, a connecting arm 5, a support rod 6, a telescopic rod 7, a spring 8, a support frame 11 and a load block 12. The base 2 is fixedly provided at the center position of the top of the mounting plate 1. The arm 3 is rotatably provided on the base 2. The arm 3 can realize multi-angle rotation to facilitate angle adjustment when grabbing items. The extension arm 4 is slidably provided on the arm 3. The extension arm 4 can be in two states of extension and retraction, so as to realize the length adjustment of the arm 3. The angle and length adjustment of the entire device are realized through the cooperation of the arm 3 and the extension arm 4. The upper end of the extension arm 4 is provided with a connecting arm 5. A support rod 6 is hingedly arranged between the inner walls, and a telescopic rod 7 is slidably arranged inside the support rod 6. The telescopic rod 7 is in a forward and backward sliding state. A spring 8 is arranged between the telescopic rod 7 and the support rod 6. The spring 8 can share the force of the telescopic rod 7, thereby realizing the supporting effect on the machine arm 3. The front end of the telescopic rod 7 is hingedly connected to the bottom of the machine arm 3, which can facilitate the adjustment of the supporting operation of the device. Support frames 11 are slidably arranged on the left and right sides of the mounting plate 1, and the outward end faces of the two support frames 11 are provided with weight blocks 12. The weight blocks 12 can load the two ends of the support frames 11, thereby forming a more stable chassis and achieving a stable effect.

[0025] like Figure 3 and Figure 4As shown, it also includes a pull rope 9, a winding wheel 91 and a clamping block 10. The top of the machine arm 3 is rotatably provided with a winding wheel 91, and the winding wheel 91 is provided with a pull rope 9. The pull rope 9 is wound on the winding wheel 91 to facilitate the collection of the pull rope 9, and the pull rope 9 and the winding wheel 91 are in a reel-type cooperation, which can realize the free reeling of the pull rope 9. The lower end of the pull rope 9 is provided with a clamping block 10, and the bottom end of the clamping block 10 is in the shape of a protruding rod, and the clamping block 10 passes through the mounting plate 1 and the inward end of the two support frames 11. The three are in a clamping cooperation, and the positions of the three can be fixed by the clamping block 10, thereby achieving the effect of stabilizing the position.

[0026] like Figure 2 As shown, a dust cover 101 is also included. The dust cover 101 is fixedly arranged on the top rear side of the mounting plate 1. The dust cover 101 is surrounded above the card block 10 and can limit the position of the card block 10 while preventing dust and protecting its surface.

[0027] like Figure 1 As shown, a mounting block 13 is also included. The bottom end of the connecting arm 5 is rotatably provided with the mounting block 13. The mounting block 13 is hook-shaped, which can facilitate the device to be assembled with a hook or clamp suitable for loading heavy objects.

[0028] like Figure 1 As shown, a guide plate 14 is also included. The rear side of the mounting block 13 is rotatably provided with the guide plate 14, and the guide plate 14 can guide the loading direction of the heavy object.

[0029] like Figure 1 and Figure 5 As shown, it also includes a connecting rod 15 and a guide plate 16. Two connecting rods 15 are fixedly arranged on the left and right sides of the arm 3. A guide plate 16 is arranged between the two connecting rods 15 on the same side, and an elastic member is sleeved on the connecting rod 15. The elastic member is connected between the connecting rod 15 and the guide plate 16. The streamlined guide plate 16 cooperates with the elastic member to achieve wind diversion, thereby reducing wind force and protecting the device.

[0030] When it is necessary to use a crane, the staff first checks whether the device is firmly installed on the vehicle body and ensures that the mounting plate 1 is in a stable state, and then the operation can be started. The staff adjusts the angle of the arm 3, and then installs the clamp or hook adapted to the heavy object on the mounting block 13, and then controls the extension arm 4 to extend it forward. After the extension arm 4 reaches the fixed point, the heavy object is hoisted. At the same time, the guide plate 14 guides the direction of the object, so that the staff can perceive the direction more intuitively when operating. When the arm 3 and the base 2 rotate, the support rod 6 also tilts, and the telescopic rod 7 moves a certain distance. The spring 8 slides and deforms to support the bottom of the arm 3, which can achieve a more stable effect. At the same time, when the arm 3 rotates or tilts at a certain angle, the pull rope 9 is pulled to reel the pull rope 91. Under the action of the pull rope 9, the rear block 10 will be separated from the mounting plate 1 and the support frame 11, so that the support frame 11 can resume its movable state, that is, the staff can slide the support frames 11 on both sides to make them unfolded. At the same time, the weight block 12 will fix the two ends of the support frame 11 by load-bearing method, thereby stabilizing its position, so that the device can achieve a more stable effect during operation.

[0031] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications, improvements and substitutions can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An extension arm for a crane, comprising a mounting plate (1), a base (2), an arm (3), an extension arm (4), a connecting arm (5), a support rod (6), a telescopic rod (7) and a spring (8), wherein a base (2) is arranged on the top of the mounting plate (1), an arm (3) is rotatably arranged on the base (2), an extension arm (4) is slidably arranged on the arm (3), a connecting arm (5) is arranged at the upper end of the extension arm (4), a support rod (6) is hingedly arranged on the base (2), a telescopic rod (7) is slidably arranged inside the support rod (6), a spring (8) is arranged between the telescopic rod (7) and the support rod (6), and a front end of the telescopic rod (7) is hingedly connected to the bottom of the arm (3); It is characterized in that It also includes a support frame (11) and a weight block (12); the support frames (11) are slidably arranged on both sides of the mounting plate (1); and the outward end surfaces of the two support frames (11) are each provided with a weight block (12).

2. The crane extension arm according to claim 1, characterized in that: It also includes a pull rope (9), a winding wheel (91) and a clamping block (10). The top of the machine arm (3) is rotatably provided with a winding wheel (91). The winding wheel (91) is provided with a pull rope (9). The pull rope (9) and the winding wheel (91) are in a reeling-type cooperation. A clamping block (10) is provided at the lower end of the pull rope (9). The clamping block (10) passes through the mounting plate (1) and the inward end of the two support frames (11), and the three are in a clamping-type cooperation.

3. The crane extension arm according to claim 2, characterized in that: It also comprises a dust cover (101), which is arranged on the top rear side of the mounting plate (1), and the dust cover (101) is located above the clamping block (10) in a surrounding manner.

4. The crane extension arm according to claim 3, characterized in that: It also includes a mounting block (13), and the mounting block (13) is rotatably arranged on the connecting arm (5).

5. The crane extension arm according to claim 4, characterized in that: It also includes a guide plate (14), and the guide plate (14) is rotatably arranged on the rear side of the mounting block (13).

6. The crane extension arm according to claim 5, characterized in that: It also includes a connecting rod (15) and a guide plate (16), wherein two connecting rods (15) are arranged on both sides of the machine arm (3), and a guide plate (16) is arranged between the two connecting rods (15) on the same side.

7. The crane extension arm according to claim 6, characterized in that: The guide plate (16) is streamlined.

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