A crane rotation angle measuring device

Abstract

The utility model discloses a crane slewing angle measuring device, including a real-time transmission measuring mechanism, a measuring and adjusting mechanism and a fixing mechanism, wherein the real-time transmission measuring mechanism includes a mounting block, a limiting groove is provided inside the mounting block, a turntable is provided inside the limiting groove, a first mounting seat is fixedly connected to the upper side of the turntable, and a rotary potentiometer is fixedly installed on the upper side of the first mounting seat. The utility model meshes the gear with the lower car slewing bearing gear through the setting of the real-time transmission measuring mechanism, the setting of the measuring and adjusting mechanism and the adjustment of the electric push rod. When the upper car rotates, the gear is meshed with the lower car slewing bearing gear, so the gear rotates, and the rotation of the gear drives the rotary potentiometer to rotate, and finally the actual slewing angle of the upper part of the crane is measured, so that the measurement accuracy is high, the measurement accuracy is maintained for a long time, and there is no need to use a rotary motor, which can effectively reduce the use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane rotation angle measuring device. Background Art

[0002] Crane is a mechanical equipment used for lifting, unloading and transporting heavy objects; it is usually composed of a hook, a lifting mechanism, a moving mechanism, an operating mechanism and a control system; cranes are widely used in construction sites, port terminals, logistics warehousing, manufacturing and other fields, and are important material handling and lifting equipment.

[0003] The turntable and the lower car of the crane are connected through a slewing bearing, wherein the outer ring of the slewing bearing is fixed to the lower car, and the inner ring is fixed to the turntable, and the slewing motor fixed on the turntable drives the slewing reducer to mesh with the outer ring teeth of the slewing bearing to realize the rotation of the turntable; when the crane is working in a narrow area, the rotation angle of its turntable will be limited, so it is necessary to detect the rotation angle in real time to prevent the turntable from colliding with external objects; a crane rotation angle measuring device is generally used for measurement. Most of the current rotation angle detections will add a sensor to the slewing motor to detect the pulse signal of the teeth of the slewing reducer gear. The number of teeth sensed during the rotation of the gear and the number of teeth on the outer ring of the slewing bearing can be determined based on the pulse signal. However, after this detection device adds a sensor for measuring the pulse signal, the cost of the slewing motor will increase a lot, and the practicality is not good; therefore, in order to solve the above problems, a crane rotation angle measuring device is proposed. Utility Model Content

[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a crane rotation angle measuring device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crane slewing angle measuring device, comprising a real-time transmission measuring mechanism, a measuring and adjusting mechanism and a fixing mechanism, the real-time transmission measuring mechanism comprising a mounting block, a limiting groove is provided inside the mounting block, a turntable is arranged inside the limiting groove, a first mounting seat is fixedly connected to the upper side of the turntable, a rotary potentiometer is fixedly installed on the upper side of the first mounting seat, a second mounting seat is fixedly connected to the lower side of the turntable, an electric push rod is fixedly installed on the lower side of the second mounting seat, a third mounting seat is fixedly connected to the lower side of the electric push rod, a gear is fixedly connected to the lower side of the third mounting seat by a screw, the gear is connected to the rotary potentiometer through the third mounting seat, the electric push rod, the second mounting seat, the turntable and the first mounting seat, so when the gear rotates, the rotary potentiometer will also rotate in real time.

[0006] Preferably, the turntable is slidably connected to the limiting groove, the measuring and adjusting mechanism is fixedly connected to the mounting block, the turntable is arranged in the mounting block, and the limiting groove is adapted to the turntable so that the limiting groove limits the turntable.

[0007] Preferably, the measuring and adjusting mechanism includes a mounting frame, a motor is fixedly mounted on one side of the mounting frame, a threaded rod is fixedly connected to the output end of the motor, a first connecting block is arranged on the outside of the threaded rod, a first slide groove is provided inside the mounting frame, the first connecting block is fixedly connected to the mounting block, a second slide groove is provided inside the mounting frame, a second connecting block is provided inside the second slide groove, the second connecting block is fixedly connected to the mounting block, the first connection block is arranged on one side of the mounting block and is fixedly connected to the mounting block, and the second connection block is arranged on the other side of the mounting block and is fixedly connected to the mounting block.

[0008] Preferably, the threaded rod is threadedly connected to the first connecting block, the first connecting block is slidably connected to the first slide groove, and the second connecting block is slidably connected to the second slide groove. The first connecting block can be moved in the first slide groove by rotating the threaded rod, thereby driving the mounting block to move.

[0009] Preferably, a setting groove is provided on the upper surface of the mounting frame, a screw is provided inside the second connecting block, the screw is fixedly connected to the second connecting block, the setting groove is communicated with the second sliding groove, and the second connecting block can be fixed in the second sliding groove when the screwing end of the screw rests on the upper surface of the mounting frame.

[0010] Preferably, fixing frames are fixedly connected to both sides of the mounting frame, fixing holes are penetrated through the surface of the fixing frame, and a plurality of fixing frames are provided, and two relatively arranged fixing frames are provided on each side of the mounting frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model meshes the gear with the lower car slewing bearing gear through the setting of the real-time transmission measuring mechanism, the setting of the measuring and adjusting mechanism and the adjustment of the electric push rod. When the upper car rotates, the gear meshes with the lower car slewing bearing gear, so the gear rotates, and the rotation of the gear drives the rotary potentiometer to rotate, and finally the actual rotation angle of the upper part of the crane is measured, so that the measurement accuracy is high, the measurement accuracy is maintained for a long time, and there is no need to use a slewing motor, which can effectively reduce the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the first structure of the utility model, which is a front view of the whole structure;

[0015] Figure 2 This is a schematic diagram of the second structure of the utility model, which is a front view of the whole structure;

[0016] Figure 3 It is a structural schematic diagram of the utility model in front view section.

[0017] In the figure: 1. mounting block; 2. limiting groove; 3. turntable; 4. first mounting seat; 5. rotary potentiometer; 6. second mounting seat; 7. electric push rod; 8. third mounting seat; 9. gear; 10. mounting frame; 11. motor; 12. threaded rod; 13. first connecting block; 14. first slide groove; 15. second slide groove; 16. second connecting block; 17. setting groove; 18. screw; 19. fixing frame; 20. fixing hole. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-3 A crane slewing angle measuring device comprises a real-time transmission measuring mechanism, a measuring and adjusting mechanism and a fixing mechanism. The real-time transmission measuring mechanism comprises a mounting block 1. A limiting slot 2 is provided inside the mounting block 1. A turntable 3 is arranged inside the limiting slot 2. A first mounting seat 4 is fixedly connected to the upper side of the turntable 3. A rotary potentiometer 5 is fixedly installed on the upper side of the first mounting seat 4. A second mounting seat 6 is fixedly connected to the lower side of the turntable 3. An electric push rod 7 is fixedly installed on the lower side of the second mounting seat 6. A third mounting seat 8 is fixedly connected to the lower side of the electric push rod 7. The lower side of the third mounting seat 8 is fixedly connected by screws. A gear 9 is fixedly connected, the turntable 3 is slidably connected to the limit groove 2, and the measuring and adjusting mechanism is fixedly connected to the mounting block 1. The gear 9 is meshed with the lower car slewing bearing gear by setting the measuring and adjusting mechanism and adjusting the electric push rod 7. When the upper car rotates, since the gear 9 is meshed with the lower car slewing bearing gear, the gear 9 will rotate, and the rotation of the gear 9 drives the rotary potentiometer 5 to rotate, and finally the actual rotation angle of the upper part of the crane is measured, so that the measurement accuracy is high, the measurement accuracy is maintained for a long time, and there is no need to use a slewing motor, which can effectively reduce the use cost.

[0020] In one aspect of the present embodiment, when the gear 9 needs to be adjusted, the motor 11 installed on one side of the mounting frame 10 can be started to drive the threaded rod 12 to rotate. The threaded connection between the threaded rod 12 and the first connecting block 13 is arranged, and the first sliding groove 14 is arranged to limit the first connecting block 13. When the threaded rod 12 rotates, the mounting block 1 can be driven to move through the first connecting block 13, so that the gear 9 can be closely meshed with the off-vehicle slewing support gear. When the mounting block 1 moves, it will drive the second connecting block 16 to slide in the second sliding groove 15, so that the movement of the mounting block 1 is more stable.

[0021] In one aspect of the present embodiment, the device is first fixed by passing an external fixing part through the fixing hole 20 through the fixing frame 19. When the gear 9 is moved to engage with the lower vehicle slewing support gear, the screw 18 is screwed into the second connecting block 16 through the setting groove 17. Thereafter, the screw 18 is continuously screwed so that the screwing end of the screw 18 abuts against the upper surface of the mounting frame 10, thereby fixing the second connecting block 16 in the second slide groove 15, and thus the mounting frame 10 can be fixed more stably through the second connecting block 16.

[0022] Working principle of the utility model: when the crane slewing angle measuring device is in use, the starting motor 11 drives the threaded rod 12 to rotate, and the threaded connection between the threaded rod 12 and the first connecting block 13 is set, and the first sliding groove 14 is set to limit the first connecting block 13, so that when the threaded rod 12 rotates, the first connecting block 13 can drive the mounting block 1 to move, so that the gear 9 can be close to the lower car slewing bearing gear, and then the gear 9 is meshed with the lower car slewing bearing gear through the adjustment of the electric push rod 7. When the upper car rotates, since the gear 9 is meshed with the lower car slewing bearing gear, the gear 9 will rotate, and the rotation of the gear 9 drives the rotary potentiometer 5 to rotate, and finally the actual rotation angle of the upper part of the crane is measured. In this scheme, all electrical equipment is powered by an external power supply.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crane slewing angle measuring device, comprising a real-time transmission measuring mechanism, a measuring and adjusting mechanism and a fixing mechanism, characterized in that: The real-time transmission measurement mechanism comprises a mounting block (1), a limiting groove (2) is provided inside the mounting block (1), a turntable (3) is arranged inside the limiting groove (2), a first mounting seat (4) is fixedly connected to the upper side of the turntable (3), a rotary potentiometer (5) is fixedly installed on the upper side of the first mounting seat (4), a second mounting seat (6) is fixedly connected to the lower side of the turntable (3), an electric push rod (7) is fixedly installed on the lower side of the second mounting seat (6), a third mounting seat (8) is fixedly connected to the lower side of the electric push rod (7), and a gear (9) is fixedly connected to the lower side of the third mounting seat (8) via screws.

2. A crane slewing angle measuring device according to claim 1, characterized in that: The rotating disk (3) is slidably connected to the limiting groove (2), and the measuring and adjusting mechanism is fixedly connected to the mounting block (1).

3. The crane slewing angle measuring device according to claim 1, characterized in that: The measuring and adjusting mechanism comprises a mounting frame (10), a motor (11) is fixedly mounted on one side of the mounting frame (10), a threaded rod (12) is fixedly connected to the output end of the motor (11), a first connecting block (13) is arranged outside the threaded rod (12), a first sliding groove (14) is provided inside the mounting frame (10), the first connecting block (13) is fixedly connected to the mounting block (1), a second sliding groove (15) is provided inside the mounting frame (10), a second connecting block (16) is arranged inside the second sliding groove (15), and the second connecting block (16) is fixedly connected to the mounting block (1).

4. A crane rotation angle measuring device according to claim 3, characterized in that: The threaded rod (12) is threadedly connected to the first connecting block (13), the first connecting block (13) is slidably connected to the first sliding groove (14), and the second connecting block (16) is slidably connected to the second sliding groove (15).

5. The crane rotation angle measuring device according to claim 3 is characterized in that: The upper surface of the mounting frame (10) is provided with a setting groove (17), and the interior of the second connecting block (16) is provided with a screw (18), and the screw (18) is fixedly connected to the second connecting block (16).

6. The crane rotation angle measuring device according to claim 3, characterized in that: The two sides of the mounting frame (10) are fixedly connected to fixing frames (19), and the surface of the fixing frame (19) is penetrated by fixing holes (20).

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