Adjustable mast of engineering machinery

Abstract

The utility model discloses an adjustable mast of engineering machinery, which relates to the technical field of mast cranes and comprises a base, a movable frame is movably arranged at one end of the upper surface of the base through a pin shaft, two insertion pipes are fixedly arranged in the base, insertion rods are inserted in the insertion pipes, and the movable frame is connected with the insertion rods. And a movable seat is fixedly arranged at one end of the insertion rod. The base is arranged, the movable frame and the supporting arm are arranged above the base, the movable frame and the supporting arm can support a pulling rope, the pulling arm is arranged between the supporting arm and the base, the supporting arm, the pulling arm and the base form a triangular structure, and the upper support and the lower support are arranged between the movable frame and the base. The movable frame, the base, the upper support and the lower support form a triangular structure, and when the mast is adjusted, the two triangular structures can be synchronously adjusted, so that the adjusting range and the adjusting speed of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mast cranes, in particular to an adjustable mast for engineering machinery. Background Art

[0002] The mast plays a role of front-drive traction support in lifting machinery, forming a support of a certain angle and height through traction.

[0003] For example, patent number CN203976260U discloses a movable mast crane, including a mast crane body and a base foundation composed of a boom, a herringbone, a base, a winch and an electrical system, a ballast and an oil cylinder, a slide rail is laid on the base foundation, a slide groove matching the slide rail is provided at the bottom of the base, and the base is placed on the slide rail; the ballast is arranged at the rear of the base; one end of the oil cylinder is fixed to the base foundation, and the other end is connected to the base; the telescopic arm of the oil cylinder is parallel to the direction of the slide rail on the base foundation, and the oil cylinder drives the base to move and then drives the crane body to slide along the slide rail. The foundation of the utility model does not need to embed anchor bolts in advance, but arranges several square steel rails on the foundation, and the crane base is directly placed on the foundation. The base can move a certain distance along the track under the action of the oil cylinder to adjust the working range of the crane to adapt to the transportation of different goods. The utility model has the advantages of novel structure, low cost, easy installation, and large working range.

[0004] The above technical solution has some problems in practical application. During the use of the equipment, the mast needs to be adaptively adjusted according to different lifting conditions. However, the adjustment range of the mast in the above technical solution is limited and the adjustment speed is slow.

[0005] Therefore, it is necessary to invent an adjustable mast for engineering machinery to solve the above problems. Utility Model Content

[0006] The utility model aims to provide an adjustable mast for engineering machinery to solve the problems raised in the above-mentioned background technology.

[0007] 7. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 1, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod has a round shank to contact with said linking rod.

[0008] Preferably, an adjusting motor is fixedly provided at one end of the adjusting screw rod, and the adjusting motor is fixedly provided on the upper surface of the base.

[0009] Preferably, an upper bracket is movably provided at the top of the movable frame via a pin, a lower bracket is provided below the upper bracket, and the bottom end of the lower bracket is movably provided at one end of the upper surface of the base via a pin.

[0010] Preferably, a thread groove is provided through a bearing in the middle of the upper bracket, and an adjusting screw is provided through the inside of the thread groove.

[0011] Preferably, a driving motor is fixedly disposed at the bottom end of the adjusting screw, and the driving motor is fixedly disposed at the top end of the lower bracket.

[0012] Preferably, two positioning grooves are provided through the top end of the lower bracket, positioning rods are provided through the inside of the positioning grooves, and the positioning rods are fixedly provided at the bottom end of the upper bracket.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model provides a base, and a movable frame and a support arm are provided above the base. The movable frame and the support arm can support the traction rope. A pulling arm is provided between the support arm and the base, and the support arm, the pulling arm and the base form a triangular structure. An upper bracket and a lower bracket are provided between the movable frame and the base, and a triangular structure is formed between the movable frame, the base, the upper bracket and the lower bracket. When the mast is adjusted, the two triangular structures can be adjusted synchronously to improve the adjustment range and adjustment speed of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a side schematic diagram of the overall structure of the utility model.

[0017] Figure 3 It is a front schematic diagram of the overall structure of the utility model.

[0018] In the figure: 1. base; 2. movable frame; 3. insert pipe; 4. insert rod; 5. movable seat; 6. support arm; 7. guide wheel; 8. traction rope; 9. winch; 10. hook; 11. pulling arm; 12. positioning seat; 13. screw rod groove; 14. adjusting screw rod; 15. adjusting motor; 16. upper bracket; 17. lower bracket; 18. threaded groove; 19. adjusting screw rod; 20. driving motor; 21. positioning groove; 22. positioning rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in 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 in 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.

[0020] The utility model provides Figure 1-3 An adjustable mast for engineering machinery shown in the figure comprises a base 1, a movable frame 2 is movably provided at one end of the upper surface of the base 1 through a pin shaft, two plugs 3 are fixedly provided inside the base 1, a plug rod 4 is inserted inside the plugs 3, a movable seat 5 is fixedly provided at one end of the plug rod 4, a support arm 6 is movably provided on the upper surface of the movable seat 5 through a pin shaft, a guide wheel 7 is provided at the top of the support arm 6 and the movable frame 2, a traction rope 8 is provided on the outer side of the guide wheel 7, a winch 9 is provided at one end of the traction rope 8, and the winch 9 is fixedly provided at one end of the upper surface of the base 1, and a hook 10 is fixedly provided at the other end of the traction rope 8;

[0021] Specifically, a pulling arm 11 is movably provided at one end of the upper surface of the base 1 through a pin shaft, and the top end of the pulling arm 11 is movably connected to the middle part of the inner wall of the support arm 6 through a pin shaft, a positioning seat 12 is fixedly provided at one end of the insertion rod 4, and the positioning seat 12 is penetrated through the middle part of the base 1 and extends to the top of the base 1, a screw rod groove 13 is penetrated through the middle part of the positioning seat 12, and an adjusting screw rod 14 is penetrated inside the screw rod groove 13, an adjusting motor 15 is fixedly provided at one end of the adjusting screw rod 14, and the adjusting motor 15 is fixedly provided on the upper surface of the base 1, the support arm 6, the pulling arm 11 and the base 1 form a triangular structure, so when the bottom end of the support arm 6 moves, the triangular structure changes, the inclination angle of the support arm 6 changes, and the top position of the support arm 6 changes at the same time;

[0022] More specifically, an upper bracket 16 is movably provided at the top of the movable frame 2 through a pin shaft, a lower bracket 17 is provided below the upper bracket 16, and the bottom end of the lower bracket 17 is movably provided at one end of the upper surface of the base 1 through a pin shaft, a threaded groove 18 is penetrated through the middle part of the upper bracket 16 through a bearing, an adjusting screw 19 is penetrated inside the threaded groove 18, a driving motor 20 is fixedly provided at the bottom end of the adjusting screw 19, and the driving motor 20 is fixedly provided at the top of the lower bracket 17, two positioning grooves 21 are penetrated at the top of the lower bracket 17, a positioning rod 22 is penetrated inside the positioning groove 21, and the positioning rod 22 is fixedly provided at the bottom end of the upper bracket 16, the movable frame 2, the upper bracket 16, the lower bracket 17 and the base 1 form a triangular structure, when the position between the upper bracket 16 and the lower bracket 17 changes, the movable frame 2 rotates around the pin shaft at its bottom end, and at this time the angle of the movable frame 2 and the top height thereof change.

[0023] Working principle of this utility model:

[0024] When the device is in use, the base 1 can be fixed in the use area by fasteners such as pins, and the adjusting motor 15 drives the adjusting screw 14 to rotate. The adjusting screw 14 cooperates with the screw groove 13, so that the positioning seat 12 slides horizontally. The positioning seat 12 can drive the movable seat 5 to move through the insertion rod 4, thereby driving the bottom end of the support arm 6 to move. Since the support arm 6, the pulling arm 11 and the base 1 form a triangular structure, when the bottom end of the support arm 6 moves, the triangular structure changes, the inclination angle of the support arm 6 changes, and the top position of the support arm 6 changes. At the same time, the adjusting screw 19 is driven to rotate by the driving motor 20, and the adjusting screw 19 cooperates with the thread groove 18, so that the position between the upper bracket 16 and the lower bracket 17 is adjusted, and the movable frame 2, the upper bracket 16, the lower bracket 17 and the base 1 form a triangular structure. When the position between the upper bracket 16 and the lower bracket 17 changes, the movable frame 2 rotates around the pin shaft at its bottom end. At this time, the angle of the movable frame 2 and the top height of the movable frame 2 change, and the device can be adjusted at this time.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An adjustable mast for engineering machinery, comprising a base (1), characterized in that: A movable frame (2) is movably provided at one end of the upper surface of the base (1) via a pin shaft, two plugs (3) are fixedly provided inside the base (1), a plug rod (4) is inserted inside the plugs (3), a movable seat (5) is fixedly provided at one end of the plug rod (4), a support arm (6) is movably provided on the upper surface of the movable seat (5) via a pin shaft, guide wheels (7) are provided at the top ends of the support arm (6) and the movable frame (2), a traction rope (8) is provided on the outer side of the guide wheel (7), a winch (9) is provided at one end of the traction rope (8), and the winch (9) is fixedly provided at A hook (10) is fixedly provided at one end of the upper surface of the base (1) and at the other end of the traction rope (8); a pulling arm (11) is movably provided at one end of the upper surface of the base (1) via a pin shaft, and the top end of the pulling arm (11) is movably connected to the middle part of the inner wall of the support arm (6) via a pin shaft; a positioning seat (12) is fixedly provided at one end of the insertion rod (4), and the positioning seat (12) is penetrated through the middle part of the base (1) and extends to the top of the base (1); a screw rod groove (13) is penetrated through the middle part of the positioning seat (12), and an adjusting screw rod (14) is penetrated inside the screw rod groove (13).

2. The adjustable mast for construction machinery according to claim 1, characterized in that: An adjusting motor (15) is fixedly arranged at one end of the adjusting screw rod (14), and the adjusting motor (15) is fixedly arranged on the upper surface of the base (1).

3. The adjustable mast for construction machinery according to claim 2, characterized in that: An upper bracket (16) is movably arranged at the top of the movable frame (2) via a pin shaft, a lower bracket (17) is arranged below the upper bracket (16), and the bottom end of the lower bracket (17) is movably arranged on one end of the upper surface of the base (1) via a pin shaft.

4. The adjustable mast for construction machinery according to claim 3, characterized in that: A thread groove (18) is provided in the middle of the upper bracket (16) through a bearing, and an adjusting screw rod (19) is provided inside the thread groove (18).

5. The adjustable mast for construction machinery according to claim 4, characterized in that: A driving motor (20) is fixedly arranged at the bottom end of the adjusting screw rod (19), and the driving motor (20) is fixedly arranged at the top end of the lower bracket (17).

6. The adjustable mast for construction machinery according to claim 5, characterized in that: Two positioning grooves (21) are provided through the top end of the lower bracket (17), positioning rods (22) are provided through the interior of the positioning grooves (21), and the positioning rods (22) are fixedly provided at the bottom end of the upper bracket (16).

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