Adjusting device for moment arm of hoisting crane

Abstract

The utility model relates to the technical field of hoisting cranes, in particular to a hoisting crane force arm adjusting device which comprises a main force arm and a positioning inserting column, an auxiliary force arm is arranged on the main force arm in a sliding mode, a plurality of positioning blocks are arranged on the main force arm in a sliding mode, an inserting groove is formed in the auxiliary force arm, and hollow sliding columns are arranged on the two sides of the inserting groove in a sliding mode. First springs are fixedly arranged on the hollow sliding columns, arc-shaped faces are arranged on the sides, away from each other, of the two hollow sliding columns, an arc-shaped groove is formed in the side, close to the positioning block, of the main force arm, a positioning column is fixedly arranged on the positioning insertion column, adjustment of the auxiliary force arm can be completed by one person, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, and in particular to a crane arm adjustment device. Background Art

[0002] A crane, commonly known as a crane or hoist, is a multi-action lifting machinery that vertically lifts and horizontally transports heavy objects within a certain range. It is a type of material handling machinery, mainly used for lifting and transporting in ports, workshops, construction sites, etc. It can complete a series of cyclic and intermittent actions such as the picking device lifts the object from the picking location, and then moves horizontally to the designated location to lower the object. When the crane is transporting heavy objects, the lever arm needs to be adjusted according to the actual situation.

[0003] As disclosed in a Chinese patent: an indoor crane for building decoration, application number: CN201610249201.4, it consists of a track, a trolley, a crane trolley, a reducer motor, a wire rope drum, a crane main column, a wire rope, a main column pulley, a main column pulley fixing pin, a main arm, a force arm adjustment hole, an auxiliary force arm, an auxiliary force arm pulley fixing pin, an auxiliary force arm pulley, a hook, a main arm support, a control switch, a main column rotating device, a main column lifting device, a track front end fixing plate, a track rear end fixing plate, a track support column, a support column adjustment hole, a support column left and right thread fine-tuning device, a ceiling top block, a wire rope drum fixing seat, a trolley connecting block, and a trolley axle.

[0004] However, in the above technical solution, after the position of the auxiliary arm is adjusted, it is necessary to align the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm with each other, and then the positioning plug can be inserted into the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm to fix the position of the auxiliary arm. This results in that when adjusting the position of the auxiliary arm, at least two people are required to complete it, one person adjusts the position of the auxiliary arm, and the other person observes the positions of the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm to align the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm, which wastes manpower. Utility Model Content

[0005] The main purpose of the utility model is to provide a crane arm adjustment device, which can effectively solve the problem in the background technology that after the position of the auxiliary arm is adjusted, the arm adjustment hole on the main arm and the arm adjustment hole on the auxiliary arm need to be aligned with each other, and then the positioning column can be inserted into the arm adjustment hole on the main arm and the arm adjustment hole on the auxiliary arm to fix the position of the auxiliary arm. This results in that when adjusting the position of the auxiliary arm, at least two people are required to complete it, one person adjusts the position of the auxiliary arm, and the other person observes the positions of the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm to align the arm adjustment holes on the main arm and the arm adjustment holes on the auxiliary arm, thereby wasting manpower.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A crane arm adjustment device includes a main arm and a positioning column, an auxiliary arm is slidably arranged on the main arm, a plurality of positioning blocks are slidably arranged on the main arm, a slot is arranged on the auxiliary arm, hollow sliding columns are slidably arranged on both sides of the slot, a first spring is fixedly arranged on the hollow sliding column, an arc surface is arranged on the side where the two hollow sliding columns are away from each other, an arc groove is arranged on the side of the main arm close to the positioning block, and a positioning column is fixedly arranged on the positioning column.

[0008] Preferably, one end of the first spring is fixedly connected to the auxiliary force arm.

[0009] Preferably, the positioning block comprises a positioning block base, a through slot and two guide slots are provided on the positioning block base, and two positioning slots are provided on the inner wall of the through slot.

[0010] Preferably, a sliding limit block is provided on one side of the positioning block base, and the sliding limit block is slidably connected to the main arm.

[0011] Preferably, a hollow push column and a second spring are fixedly provided on one side of the positioning block base away from the guide groove, and one end of the second spring is fixedly connected to the main force arm.

[0012] Preferably, the through groove, the guide groove and the positioning groove are interconnected.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) When the position of the auxiliary arm needs to be adjusted, the utility model moves the auxiliary arm, and the arc groove squeezes the arc surface, so that the two hollow slide columns are close to each other, and the first spring is deformed. When the hollow slide column moves to the other arc groove, the first spring is deformed and rebounds, so that one end of the hollow slide column enters the arc groove, and the through groove and the inner and outer slots of the hollow slide column are aligned with each other. At this time, if the auxiliary arm continues to move, the resistance will obviously increase, thereby prompting the staff to fix the auxiliary arm. At the same time, the hollow slide column squeezes the hollow push column, and the positioning block base is moved away from the slot through the hollow push column, so that a part of the positioning block base inside the main arm is moved to the outside of the main arm, which is convenient for the staff to observe the position of the hollow slide column, and further prompts the staff to fix the auxiliary arm. One person can complete the adjustment of the auxiliary arm, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional three-dimensional structural schematic diagram of a crane arm adjustment device of the utility model;

[0016] Figure 2 The utility model is a crane arm adjustment device Figure 1 A schematic diagram of a local enlarged structure;

[0017] Figure 3 This is a structural schematic diagram of a positioning block in a crane arm adjustment device of the utility model;

[0018] Figure 4 The utility model is a rear structural schematic diagram of a positioning block in a crane arm adjustment device.

[0019] In the figure: 1. main force arm; 2. positioning plug column; 3. auxiliary force arm; 4. positioning block; 401. positioning block base; 402. through groove; 403. guide groove; 404. positioning groove; 405. sliding limit block; 406. hollow push column; 407. second spring; 5. slot; 6. hollow sliding column; 7. first spring; 8. arc surface; 9. arc groove; 10. positioning column. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 and Figure 2As shown, a crane arm adjustment device includes a main arm 1 and a positioning column 2, an auxiliary arm 3 is slidably arranged on the main arm 1, a plurality of positioning blocks 4 are slidably arranged on the main arm 1, a slot 5 is arranged on the auxiliary arm 3, hollow sliding columns 6 are slidably arranged on both sides of the slot 5, a first spring 7 is fixedly arranged on the hollow sliding column 6, an arc surface 8 is arranged on the side where the two hollow sliding columns 6 are away from each other, an arc groove 9 is arranged on the side of the main arm 1 close to the positioning block 4, and a positioning column 10 is fixedly arranged on the positioning column 2.

[0022] like Figure 3 and Figure 4 As shown, in another embodiment of the utility model, the positioning block 4 includes a positioning block base 401, a through slot 402 and two guide slots 403 are provided on the positioning block base 401, and two positioning slots 404 are provided on the inner wall of the through slot 402;

[0023] A sliding limit block 405 is provided on one side of the positioning block base 401, and the sliding limit block 405 is slidably connected to the main arm 1;

[0024] The side of the positioning block base 401 away from the guide groove 403 is fixedly provided with a hollow push column 406 and a second spring 407, one end of the second spring 407 is fixedly connected to the main arm 1, and when the hollow sliding column 6 moves to the arc groove 9, the first spring 7 deforms and rebounds, so that one end of the hollow sliding column 6 enters the arc groove 9, and then the hollow sliding column 6 squeezes the hollow push column 406, and the positioning block base 401 is moved in the direction away from the slot 5 through the hollow push column 406, and the second spring 407 is deformed, so that a part of the positioning block base 401 inside the main arm 1 moves to the outside of the main arm 1, which is convenient for the staff to observe the position of the hollow sliding column 6, and then The positioning pin 2 is passed through the through slot 402 and the inner cavity of the hollow slide column 6 into the slot 5, and the positioning column 10 is located in the guide slot 403, so that the auxiliary arm 3 is fixed at this time by the positioning pin 2, and then the positioning pin 2 is released. Then, under the action of gravity, the positioning pin 2 rotates around the positioning pin 10, so that the positioning pin 2 enters the positioning slot 404, thereby limiting the position of the positioning pin 2 to a certain extent. When the hollow slide column 6 leaves the arc slot 9, the second spring 407 rebounds, so that the positioning block base 401 re-enters the main arm 1, thereby preventing the protruding positioning block base 401 from hindering the movement of the main arm 1.

[0025] The working principle of this crane arm adjustment device:

[0026] When in use, first when the position of the auxiliary arm 3 needs to be adjusted, the auxiliary arm 3 is moved, and the auxiliary arm 3 drives the hollow sliding column 6 to move, and then the arc groove 9 squeezes the arc surface 8, so that the two hollow sliding columns 6 are close to each other, the first spring 7 is deformed, and the hollow sliding column 6 is inside the auxiliary arm 3, and then the auxiliary arm 3 continues to move. When the hollow sliding column 6 moves to the other arc groove 9, the first spring 7 deforms and rebounds, so that one end of the hollow sliding column 6 enters the arc groove 9, and the through groove 402 and the hollow sliding column 6 and the slot 5 are aligned with each other. At this time, if the auxiliary arm 3 continues to move, the resistance will obviously increase, thereby prompting the staff to fix the auxiliary arm 3. At the same time, the hollow sliding column 6 squeezes the hollow push column 406, and the positioning block base 401 is moved away from the slot 5 through the hollow push column 406. The auxiliary arm 3 is moved to the outside by the second spring 407, and the second spring 407 is deformed, so that a part of the positioning block base 401 inside the main arm 1 is moved to the outside of the main arm 1, so that the staff can observe the position of the hollow sliding column 6 conveniently, and further prompt the staff to fix the auxiliary arm 3. One person can complete the adjustment of the auxiliary arm 3, saving manpower. Then the positioning plug 2 is passed through the through groove 402 and the inner cavity of the hollow sliding column 6 into the slot 5, and the positioning column 10 is located in the guide groove 403, so that the auxiliary arm 3 is fixed at this time by the positioning plug 2, and then the positioning plug 2 is released. Then, under the action of gravity, the positioning plug 2 rotates around the positioning column 10, so that the positioning plug 2 enters the positioning groove 404, thereby limiting the position of the positioning plug 2 to a certain extent.

[0027] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A crane arm adjustment device, comprising a main arm (1) and a positioning column (2), characterized in that: The main arm (1) is slidably provided with an auxiliary arm (3), the main arm (1) is slidably provided with a plurality of positioning blocks (4), the auxiliary arm (3) is provided with a slot (5), hollow sliding columns (6) are slidably provided on both sides of the slot (5), a first spring (7) is fixedly provided on the hollow sliding column (6), an arc surface (8) is provided on the side away from each other of the two hollow sliding columns (6), an arc groove (9) is provided on the side of the main arm (1) close to the positioning block (4), and a positioning column (10) is fixedly provided on the positioning plug column (2).

2. A crane arm adjustment device according to claim 1, characterized in that: One end of the first spring (7) is fixedly connected to the auxiliary force arm (3).

3. A crane arm adjustment device according to claim 2, characterized in that: The positioning block (4) comprises a positioning block base (401), a through slot (402) and two guide slots (403) are provided on the positioning block base (401), and two positioning slots (404) are provided on the inner wall of the through slot (402).

4. A crane arm adjustment device according to claim 3, characterized in that: A sliding limit block (405) is provided on one side of the positioning block base (401), and the sliding limit block (405) is slidably connected to the main force arm (1).

5. A crane arm adjustment device according to claim 4, characterized in that: A hollow push column (406) and a second spring (407) are fixedly arranged on one side of the positioning block base (401) away from the guide groove (403), and one end of the second spring (407) is fixedly connected to the main force arm (1).

6. A crane arm adjustment device according to claim 5, characterized in that: The through groove (402), the guide groove (403) and the positioning groove (404) are interconnected.

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