Miniature crane structure with self-adaptive load adjusting function

Abstract

The invention belongs to the technical field of miniature cranes, and particularly relates to a miniature crane structure with a self-adaptive load adjusting function, which comprises a base, a support column is fixed at the top of the base, a cross beam is hinged to the upper side of one side wall of the support column, and a hydraulic push rod is hinged to the lower side of one side wall of the support column corresponding to the cross beam; a mounting groove is formed in the bottom of the cross beam, a pressure sensor is fixed in the mounting groove, the bottom of the pressure sensor is hinged to the outer end of the hydraulic push rod through a hinge piece, a controller and an alarm are fixed to one side wall of the supporting column, and the outer end of the short shaft on one side is connected with a heat dissipation assembly. Load monitoring is achieved, the controller can adjust the power of the servo motor through the frequency converter according to the load condition, so that the power can be automatically matched with the load, it is guaranteed that the servo motor is in the optimal working state when goods are hoisted, the servo motor is protected, and the service life of the servo motor is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of micro cranes, and in particular to a micro crane structure with an adaptive load adjustment function. Background Art

[0002] A crane is also called a hoist. A crane refers to a multi-action lifting machine that can lift heavy objects vertically and carry them horizontally within a certain range. It is also called an overhead crane, an overhead crane, or a crane. A micro crane is a micro crane as the name suggests.

[0003] At present, micro cranes are composed of a bracket, a servo motor, a winding roller and a wire rope. A guide wheel is installed on the bracket to guide the wire rope, and then the servo motor drives the winding roller to retract and release the wire rope. A hook is installed at the outer end of the wire rope, so that the hook and the object can be hung, so as to realize the use of the wire rope to drive the object to lift and lower. However, in actual use, the servo motor often outputs constant power and does not have the effect of adjusting the servo motor power for different loads. Therefore, when the load is large, the servo motor continues to work at a constant power, which will affect the servo motor itself and its service life. At the same time, the guide wheel will generate certain friction when guiding the wire rope. At the same time, when working for a long time, the heat on the guide wheel and the wire rope will accumulate, and the autonomous heat dissipation effect is poor, which is easy to affect the service life. For this reason, it is necessary to design a new technical solution to solve it. Summary of the invention

[0004] The purpose of the present invention is to provide a micro crane structure with an adaptive load adjustment function, which solves the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a micro crane structure with an adaptive load adjustment function, comprising a base, a pillar is fixed on the top of the base, a crossbeam is hinged on the upper side of one side wall of the pillar, a first guide wheel and a second guide wheel are respectively installed in the frame at the top of the pillar and in the groove opened at the outer end of the crossbeam, hollow short shafts are connected at the middle of the two side walls of the first guide wheel and the second guide wheel, two groups of the short shafts are respectively movably passed through the frame and the inner side of the groove, a frame is fixed on the upper side of the other side wall of the pillar, a winding roller is rotatably installed on the inner wall of the frame, a servo motor and a frequency converter are fixedly installed on one side wall of the frame, a transmission shaft of the servo motor movably passes through the frame and is fixedly connected to one end of the winding roller, a steel wire rope is wound around the outer wall of the winding roller, and the outer end of the steel wire rope passes around the first guide wheel and the second guide wheel and is fixedly connected to a hook;

[0006] A hydraulic push rod is hinged on the lower side of one side wall of the corresponding cross beam of the pillar, a mounting groove is provided at the bottom of the cross beam and a pressure sensor is fixed in the mounting groove, the bottom of the pressure sensor and the outer end of the hydraulic push rod are hinged through a hinge, a controller and an alarm are fixed on one side wall of the pillar, and the outer end of the short shaft on one side is connected to a heat dissipation component.

[0007] As a preferred embodiment of the present invention, the signal output end of the pressure sensor is connected to the signal input end of the controller, the signal output end of the controller is connected to the signal input end of the frequency converter and the alarm, and the signal output end of the frequency converter is connected to the signal input end of the servo motor.

[0008] By adopting the above technical solution, the device is first transferred to the position where it is needed, and then the servo motor drives the winding roller to rotate, so as to realize the retraction and release of the wire rope, so as to realize the lifting of the items hung on the hook. In the process of lifting the goods, the pressure sensor will monitor the pressure value and feed it back to the controller, so as to achieve the effect of monitoring the load, and the controller will use the inverter to adjust the power of the servo motor according to the load situation, so that the power can be automatically adapted to the load, so as to ensure that the servo motor is in the best working state when lifting the goods, protect the servo motor and extend the service life of the servo motor. At the same time, when the load exceeds the load range, the controller will start the alarm to alarm, so as to avoid dangerous situations. At the same time, the wire rope will generate friction heat with the first guide wheel and the second guide wheel during the continuous retraction and release process, so that the heat dissipation component can be used for auxiliary heat dissipation, which is conducive to reducing heat accumulation.

[0009] As a preferred embodiment of the present invention, the heat dissipation assembly includes a connecting shaft, which is a hollow structure. The connecting shaft and the corresponding short shaft are fixedly connected, a plurality of evenly distributed blades are fixed to the outer end of the connecting shaft, a plurality of evenly distributed strip holes are opened on the outer wall of the connecting shaft, and a cover shell is movably mounted on the outer wall of the connecting shaft, and the two cover shells are respectively fixedly connected to the pillar and the beam.

[0010] By adopting the above technical scheme, the connecting shaft can be driven to rotate during the rotation of the first guide wheel and the second guide wheel, thereby driving the blades to rotate, thereby driving the blades to blow air, so that the wind can enter the inner cavity of the short shaft along the strip holes on the connecting shaft, thereby entering the inner cavity of the first guide wheel and the second guide wheel, and then be discharged along the short shaft on the other side, thereby clamping the flow speed of the gas in the first guide wheel and the second guide wheel, thereby further improving the heat dissipation effect, and thus helping to avoid the situation where the service life of the first guide wheel and the second guide wheel and the wire rope is affected by heat accumulation. At the same time, when the first guide wheel and the second guide wheel rotate in the opposite direction, the blades rotate in the opposite direction, thereby realizing exhaust and changing the direction of gas flow, and still achieving rapid heat dissipation of the first guide wheel and the second guide wheel.

[0011] As a preferred embodiment of the present invention, the outer walls of the first guide wheel and the second guide wheel are both provided with a plurality of evenly distributed holes.

[0012] As a preferred embodiment of the present invention, a dustproof net is fixed to the outer opening of the cover shell.

[0013] As a preferred embodiment of the present invention, an extension rod is fixed in the middle of one side wall of the pillar, and handles are fixed on both side walls of the outer end of the extension rod.

[0014] As a preferred embodiment of the present invention, a side wall of the base is hinged with a transverse plate on both sides, and the outer end bottom of the transverse plate and both sides of the bottom of the base are fixed with self-locking universal wheels.

[0015] As a preferred embodiment of the present invention, a limiting hole is provided on the surface of the transverse plate.

[0016] As a preferred embodiment of the present invention, the pillars and beams are both hollow square tubes.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention pushes the crossbeam through the hydraulic push rod to form a support, and then the servo motor drives the winding roller to wind the wire rope, and the wire rope will press the first guide wheel and the second guide wheel, so that the pressure sensor under the crossbeam will detect the pressure, and then feed it back to the controller, so as to realize load monitoring. The controller will use the frequency converter to adjust the power of the servo motor according to the load condition, so that the power can be automatically adapted to the load, thereby ensuring that the servo motor is in the best working state when lifting the goods, protecting the servo motor and extending the service life of the servo motor;

[0019] The first guide wheel and the second guide wheel are hollow structures, and both side walls of the first guide wheel and the second guide wheel are connected with hollow short shafts, and holes are opened on the outer walls of the first guide wheel and the second guide wheel, so that during use, air can enter the first guide wheel and the second guide wheel along the short shaft and then be discharged along the holes, thereby improving the heat dissipation effect of the first guide wheel and the second guide wheel themselves, and also assisting the heat dissipation of the wire rope, thereby improving the heat dissipation effect and helping to reduce heat accumulation;

[0020] The rotation of the first guide wheel and the second guide wheel can drive the connecting shaft to rotate, thereby driving the blades to rotate, thereby driving the blades to blow air, so that the wind can enter the inner cavity of the short shaft along the strip holes on the connecting shaft, and then enter the inner cavity of the first guide wheel and the second guide wheel, and then be discharged along the short shaft on the other side, so as to clamp the flow speed of the gas in the first guide wheel and the second guide wheel, thereby further improving the heat dissipation effect, and thus helping to avoid the situation where the service life of the first guide wheel and the second guide wheel and the wire rope is affected by heat accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of a micro crane structure with an adaptive load adjustment function according to the present invention;

[0023] Figure 2 It is a rear view structural schematic diagram of a micro crane structure with adaptive load adjustment function according to the present invention;

[0024] Figure 3 It is a schematic diagram of the heat dissipation component structure of a micro crane structure with an adaptive load adjustment function according to the present invention;

[0025] Figure 4 This is a schematic diagram of the first guide wheel structure of a micro crane structure with an adaptive load adjustment function according to the present invention;

[0026] Figure 5 It is an enlarged structural schematic diagram of A of a micro crane structure with adaptive load adjustment function of the present invention.

[0027] In the figure:

[0028] 1. Base; 11. Pillar; 12. Frame; 13. Winding roller; 14. Wire rope; 15. Hook; 16. First guide wheel; 17. Second guide wheel; 18. Self-locking universal wheel; 19. Crossbeam;

[0029] 2. Horizontal plate; 21. Limiting hole;

[0030] 3. Hydraulic push rod; 31. Articulated part; 32. Pressure sensor;

[0031] 4. heat dissipation component; 41. cover shell; 42. connecting shaft; 43. blade; 44. strip hole;

[0032] 5. Extension rod; 51. Handle;

[0033] 6. Short axis;

[0034] 7. Holes. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The models of electrical appliances provided in the present invention are only for reference, and different models of electrical appliances with the same functions can be replaced according to actual usage.

[0038] See also Figure 1-5The present invention provides a technical solution: a micro crane structure with adaptive load adjustment function, comprising a base 1, a pillar 11 is fixed on the top of the base 1, a crossbeam 19 is hinged on the upper side of one side wall of the pillar 11, a first guide wheel 16 and a second guide wheel 17 are respectively installed in the frame at the top of the pillar 11 and in the groove opened at the outer end of the crossbeam 19, the middle of the two side walls of the first guide wheel 16 and the second guide wheel 17 are connected with a hollow short shaft 6, the two groups of short shafts 6 are respectively movably passed through the frame and the inner side of the groove, a frame 12 is fixed on the upper side of the other side wall of the pillar 11, a winding roller 13 is rotatably installed on the inner wall of the frame 12, a servo motor and a frequency converter are fixedly installed on one side wall of the frame 12, the transmission shaft of the servo motor movably passes through the frame 12 and is fixedly connected to one end of the winding roller 13, a steel wire rope 14 is wound around the outer wall of the winding roller 13, and the outer end of the steel wire rope 14 passes around the first guide wheel 16 and the second guide wheel 17 and is fixedly connected with a hook 15;

[0039] A hydraulic push rod 3 is hinged on the lower side of one side wall of the corresponding cross beam 19 of the pillar 11, a mounting groove is provided at the bottom of the cross beam 19 and a pressure sensor 32 is fixed in the mounting groove, the bottom of the pressure sensor 32 and the outer end of the push rod of the hydraulic push rod 3 are hinged by a hinge 31, a controller and an alarm are fixed on one side wall of the pillar 11, and a heat dissipation component 4 is connected to the outer end of the short shaft 6 on one side;

[0040] The signal output end of the pressure sensor 32 is connected to the signal input end of the controller, the signal output end of the controller is connected to the signal input end of the frequency converter and the alarm, and the signal output end of the frequency converter is connected to the signal input end of the servo motor;

[0041] In actual use, the device is first transferred to the position where it is needed, and then the servo motor is used to drive the winding roller 13 to rotate, so as to realize the retraction and release of the wire rope 14, so as to realize the lifting of the items hung on the hook 15. In the process of lifting the goods, the pressure sensor 32 will monitor the pressure value and feed it back to the controller, so as to achieve the effect of monitoring the load, and the controller will use the inverter to adjust the power of the servo motor according to the load situation, so that the power can be automatically adapted to the load, so as to ensure that the servo motor is in the best working state when lifting the goods, protect the servo motor and extend the service life of the servo motor. At the same time, when the load exceeds the load range, the controller will start the alarm to alarm, so as to avoid dangerous situations. At the same time, the wire rope 14 will generate friction heat with the first guide wheel 16 and the second guide wheel 17 during the continuous retraction and release process, so that the heat dissipation component 4 can be used for auxiliary heat dissipation, which is conducive to reducing heat accumulation.

[0042] Furthermore, a horizontal plate 2 is hinged on both sides of one side wall of the base 1, and self-locking universal wheels 18 are fixed to the outer bottom of the horizontal plate 2 and both sides of the bottom of the base 1, so that the entire device can be transferred and moved using the self-locking universal wheels 18.

[0043] Furthermore, an extension rod 5 is fixed in the middle of one side wall of the pillar 11, and handles 51 are fixed to both side walls of the outer end of the extension rod 5. The arrangement of the handle 51 makes it convenient for the staff to hold the handle 51 and push the entire device for transfer.

[0044] It is worth mentioning that a limiting hole 21 is provided on the surface of the transverse plate 2. The setting of the limiting hole 21 enables the two transverse plates 2 to be limited by a pin shaft with a certain length inserted into the two limiting holes 21 after the two transverse plates 2 are opened to a certain angle, thereby ensuring the overall stability of the device.

[0045] It should be noted that the support 11 and the crossbeam 19 are both hollow square tubes, which can minimize the overall weight of the device and improve the ease of transfer.

[0046] like Figure 1 and 2 , 3; the heat dissipation assembly 4 includes a connecting shaft 42, the connecting shaft 42 is a hollow structure, the connecting shaft 42 and the corresponding short shaft 6 are fixedly connected, the outer end of the connecting shaft 42 is fixed with a plurality of evenly distributed blades 43, the outer wall of the connecting shaft 42 is provided with a plurality of evenly distributed strip holes 44, the outer wall of the connecting shaft 42 is movably sleeved with a cover 41, and the two cover shells 41 are fixedly connected to the pillar 11 and the beam 19 respectively;

[0047] In the process of the first guide wheel 16 and the second guide wheel 17 rotating, the connecting shaft 42 can be driven to rotate, thereby driving the blades 43 to rotate, so as to drive the blades 43 to blow air, so that the wind can enter the inner cavity of the short shaft 6 along the strip hole 44 on the connecting shaft 42, thereby entering the inner cavity of the first guide wheel 16 and the second guide wheel 17, and then be discharged along the short shaft 6 on the other side, so as to clamp the flow speed of the gas in the first guide wheel 16 and the second guide wheel 17, so as to further improve the heat dissipation effect, and thus help to avoid the situation where the service life of the first guide wheel 16 and the second guide wheel 17 and the wire rope 14 is affected by heat accumulation. At the same time, when the first guide wheel 16 and the second guide wheel 17 rotate in the opposite direction, the blades 43 rotate in the opposite direction, so as to realize exhaust and change the direction of gas flow, and still realize rapid heat dissipation of the first guide wheel 16 and the second guide wheel 17.

[0048] Furthermore, a dustproof net is fixed at the outer opening of the cover shell 41 , and the dustproof net can prevent external impurities from entering and affecting the blades 43 .

[0049] Furthermore, the outer walls of the first guide wheel 16 and the second guide wheel 17 are provided with a plurality of evenly distributed holes 7. The arrangement of the holes 7 allows the gas to pass through the holes 7 and act on the surface of the wire rope 14, thereby assisting the wire rope 14 in dissipating heat and further improving the heat dissipation effect.

[0050] The implementation principle of the micro crane structure with adaptive load adjustment function of the present application is: in actual use, first transfer the device to the position where it needs to be used, and then drive the winding roller 13 to rotate through the servo motor, so as to realize the winding and releasing of the wire rope 14, so as to realize the lifting of the items hung by the hook 15. In the process of lifting the goods, the pressure sensor 32 will monitor the pressure value and feed it back to the controller, so as to achieve the effect of monitoring the load, and the controller will use the frequency converter to adjust the power of the servo motor according to the load situation, so that the power can be automatically adapted to the load, so as to ensure that the servo motor is in the best working state when lifting the goods, protect the servo motor and extend the service life of the servo motor. At the same time, when the load exceeds the load range, the controller will activate the alarm to alarm, so as to avoid dangerous situations. At the same time, the wire rope 14 will be in the process of continuous winding and releasing, and the first guide wheel 16 and The second guide wheel 17 generates friction heat, and in the process of rotating the first guide wheel 16 and the second guide wheel 17, it can drive the connecting shaft 42 to rotate, thereby driving the blades 43 to rotate, so as to drive the blades 43 to blow air, so that the wind can enter the inner cavity of the short shaft 6 along the strip holes 44 on the connecting shaft 42, thereby entering the inner cavity of the first guide wheel 16 and the second guide wheel 17, and then be discharged along the short shaft 6 on the other side, so as to clamp the flow speed of the gas in the first guide wheel 16 and the second guide wheel 17, so as to further improve the heat dissipation effect, and thus help to avoid the situation where the service life of the first guide wheel 16 and the second guide wheel 17 and the wire rope 14 is affected by heat accumulation. At the same time, when the first guide wheel 16 and the second guide wheel 17 rotate in the opposite direction, the blades 43 rotate in the opposite direction, so as to realize exhaust and change the direction of gas flow, and still realize rapid heat dissipation of the first guide wheel 16 and the second guide wheel 17.

[0051] In addition, the components included in the micro crane structure with adaptive load adjustment function of the present invention are all universal standard parts or components known to technical personnel in this field. The structure and principle can be known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adaptive monitoring computers and power supplies are connected through wires. The specific connection means should refer to the following working principle. The electrical connection is completed in the working order of each electrical component. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A micro crane structure with adaptive load adjustment function, comprising a base (1), characterized in that: A support column (11) is fixed on the top of the base (1), a crossbeam (19) is hinged on the upper side of one side wall of the support column (11), a first guide wheel (16) and a second guide wheel (17) are respectively installed in the frame at the top of the support column (11) and in the groove formed at the outer end of the crossbeam (19), the middle of the two side walls of the first guide wheel (16) and the second guide wheel (17) are connected with a hollow short shaft (6), two groups of the short shafts (6) are respectively movably passed through the frame and the inner side of the groove, the support column (11) A frame (12) is fixed on the upper side of the other side wall, a winding roller (13) is rotatably mounted on the inner wall of the frame (12), a servo motor and a frequency converter are fixedly mounted on one side wall of the frame (12), a transmission shaft of the servo motor movably passes through the frame (12) and is fixedly connected to one end of the winding roller (13), a steel wire rope (14) is wound around the outer wall of the winding roller (13), the outer end of the steel wire rope (14) passes around a first guide wheel (16) and a second guide wheel (17) and is fixedly connected to a hook (15); A hydraulic push rod (3) is hingedly connected to the lower side of one side wall of the corresponding cross beam (19) of the support (11); a mounting groove is provided at the bottom of the cross beam (19) and a pressure sensor (32) is fixed in the mounting groove; the bottom of the pressure sensor (32) and the outer end of the hydraulic push rod (3) are hingedly connected via a hinge (31); a controller and an alarm are fixed to one side wall of the support (11); and a heat dissipation component (4) is connected to the outer end of the short shaft (6) on one side.

2. The micro crane structure with adaptive load adjustment function according to claim 1 is characterized in that: The signal output end of the pressure sensor (32) is connected to the signal input end of the controller, the signal output end of the controller is connected to the signal input end of the frequency converter and the alarm, and the signal output end of the frequency converter is connected to the signal input end of the servo motor.

3. The micro crane structure with adaptive load adjustment function according to claim 1 is characterized in that: The heat dissipation assembly (4) comprises a connecting shaft (42), the connecting shaft (42) is a hollow structure, the connecting shaft (42) and the corresponding short shaft (6) are fixedly connected, a plurality of evenly distributed blades (43) are fixed to the outer end of the connecting shaft (42), a plurality of evenly distributed strip holes (44) are opened on the outer wall of the connecting shaft (42), and a cover shell (41) is movably mounted on the outer wall of the connecting shaft (42), and the two cover shells (41) are respectively fixedly connected to the pillar (11) and the crossbeam (19).

4. The micro crane structure with adaptive load adjustment function according to claim 3 is characterized in that: The outer walls of the first guide wheel (16) and the second guide wheel (17) are each provided with a plurality of evenly distributed holes (7).

5. The micro crane structure with adaptive load adjustment function according to claim 3 is characterized in that: A dustproof net is fixed at the outer opening of the cover shell (41).

6. The micro crane structure with adaptive load adjustment function according to claim 1, characterized in that: An extension rod (5) is fixed in the middle of one side wall of the support (11), and handles (51) are fixed on both side walls of the outer ends of the extension rod (5).

7. The micro crane structure with adaptive load adjustment function according to claim 1 is characterized in that: A transverse plate (2) is hingedly connected to both sides of a side wall of the base (1), and self-locking universal wheels (18) are fixed to the outer bottom of the transverse plate (2) and both sides of the bottom of the base (1).

8. The micro crane structure with adaptive load adjustment function according to claim 7, characterized in that: A limiting hole (21) is provided on the surface of the transverse plate (2).

9. The micro crane structure with adaptive load adjustment function according to claim 1, characterized in that: The pillars (11) and the crossbeams (19) are both hollow square tubes.

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