CN210915072U

CN210915072U - Hollow single-point crane

Info

Publication number: CN210915072U
Application number: CN201921737782.1U
Authority: CN
Inventors: 田吉韦; 田宏裕
Original assignee: Jiangsu Gingko Stage Equipment Co ltd
Current assignee: Jiangsu Gingko Stage Equipment Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-07-03
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to a hollow single-point crane, which comprises a shell, a servo motor, a speed reducer, a rope inlet swinging wheel, a hollow winding drum, a rope outlet swinging wheel and a gear mechanism consisting of a driving gear and a rotary gear which are matched with each other, wherein the shell consists of two parallel side plates and a connecting plate which connects the two side plates; a rotating shaft parallel to an output shaft of the speed reducer is installed on the shell, and two ends of the rotating shaft are provided with two rotary gears which are matched with the driving gears and correspond to the driving gears one by one; an output shaft of the servo motor is connected with an input shaft of a speed reducer, and an output shaft of the speed reducer is connected with a driving gear so as to drive the driving gear to rotate; the hollow winding drum is sleeved on the rotating shaft and fixed together. The utility model not only can improve the rotating speed, but also greatly improves the bearing capacity of the winding drum through gear transmission; in addition, the hollow winding drum is arranged between the two side plates, so that the volume occupation is further reduced, and the weight is greatly reduced.

Description

Hollow single-point crane

Technical Field

The utility model relates to a cavity formula single-point loop wheel machine belongs to stage equipment technical field.

Background

The single-point crane is a hoisting device used for hanging props, actors or other performance facilities, and is widely applied to studios, theaters, multifunctional halls and the like. The single point crane has great flexibility in use, and the lifting point can move freely or along the track, so that the position of the lifting point can cover a certain area or a large area of the stage.

The single point crane normally requires that the spatial position of the rope outlet point is approximately unchanged, but because the steel wire rope is wound on the winding drum (the winding drum is provided with the rope grooves), once the steel wire rope enters or exits, the position of the steel wire rope relative to the winding drum is changed. Therefore, in order to ensure that the spatial position of the rope outlet point of the single-point crane is kept approximately unchanged, the prior art mostly adopts a rocker arm type single-point crane, a rope outlet pulley and reel mobile single-point crane or an integral mobile single-point crane, and the concrete structures and working principles of the three cranes can refer to three driving modes and application modes of the single-point crane (author: xue Cheng, Fanghuili, Yao Liang, Yan Yi science and technology, 2017 (7)).

However, the running speed of the rocker arm type single-point crane is not suitable to be too fast, is generally controlled below 1.5m/s, and has a small load, generally not exceeding 250kg, otherwise rope disorder or rope skipping is easily caused. The single-point crane with the movable rope outlet pulley and the movable winding drum is too complex in structure and high in manufacturing cost. And the whole portable single-point loop wheel machine is when going out or entering the groove angle and surpassing 3, can take place to jump the groove or the phenomenon is wiped to the wire rope card, lead to the unable normal work of single-point loop wheel machine, consequently need do the reel very big, accomplish enough with holding the rope volume in limited axial distance, satisfy the lift requirement of single-point loop wheel machine, also exactly because the increase of reel, the moment that leads to the motor needs increases, then the requirement of selecting for use bigger reduction gear to adapt to the loop wheel machine, thereby manufacturing cost has been increased.

In addition, the reel in the prior art is directly used as a rotating shaft, so that the reel is generally of a solid structure, the weight and the cost of the crane are large, the crane is often arranged above a stage, and inconvenience is caused during installation and use, and particularly the problem is more prominent in the integral movable single-point crane.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the single-point crane has the advantages of high running speed, light weight, low cost and small occupied space.

In order to solve the technical problem, the utility model provides a technical scheme is: a hollow single-point crane comprises a shell, a power source, a rope inlet swinging wheel, a rope outlet swinging wheel and a winding drum, wherein the rope inlet swinging wheel, the rope outlet swinging wheel and the power source are all arranged on the shell; the shell is composed of two parallel side plates and a connecting plate for connecting the two side plates; the power source is a servo motor, an output shaft of the servo motor is connected with an input shaft of a speed reducer, the output shaft of the speed reducer extends out to the left side and the right side, a driving gear is fixedly connected to the left extending part and the right extending part respectively, a rotating shaft parallel to the output shaft of the speed reducer is installed on the shell, two ends of the rotating shaft are provided with two rotary gears which are matched with the driving gear and correspond to the driving gear one by one, and the driving gear and the rotary gears form a gear driving mechanism; the winding drum is a hollow winding drum, the hollow winding drum is positioned between the two rotary gears and sleeved on the rotating shaft, and the hollow winding drum is fixedly connected with the rotating shaft; the servo motor, the hollow winding drum, the speed reducer and the gear driving mechanism are all located between the two side plates.

The utility model discloses when using, wire rope penetrates and wears out behind the wheel through cavity reel and play rope pendulum from advancing the rope pendulum to the wheel. After the servo motor is started, the speed reducer is driven to drive the driving gear to rotate, and then the hollow winding drum is driven to rotate through the meshing of the driving gear and the rotary gear. The utility model adopts the servo motor as power, and has the advantages of small volume, fast running speed, fast response, large overload capacity, wide speed regulation range, large low-speed moment, small fluctuation, stable running, low noise, high efficiency and the like; the utility model discloses still adopt gear mechanism as transmission structure, with the lead screw among the prior art and establish the rotation axis outside that is driven by slewing gear with cavity reel cover, not only reduced the weight of reel, further reduced the volume moreover and occupy. Furthermore, servo motor, speed reducer and gear mechanism are located between two blocks of curb plates, consequently compared with the prior art, the utility model, not only can make the bearing capacity of reel obtain improving greatly through gear drive, moreover under equal load condition, the volume can be done very little.

The utility model discloses a preset different drive ratios's gear mechanism, can adjust the reel rotational speed, through the experimental demonstration of the applicant, the top speed can reach 4m/s, surpasses the speed of highest 1.5m/s among the prior art far away. Additionally, the utility model discloses make the reel cavity form, the reel no longer directly can obtain guaranteeing as the rotation axis, its intensity, but its weight alleviates greatly than the solid construction among the prior art.

The further improvement of the technical scheme is as follows: the rope pressing device is arranged on the shell and is an elastic columnar object arranged in parallel with the hollow winding drum, and a gap is reserved between the rope pressing device and the hollow winding drum. The rope pressing device is preferably made of polyurethane high polymer materials, and the gap is matched with the outer diameter of the steel wire rope, so that high abrasion resistance, insulation, electric conduction prevention, rope loosening prevention, rope disorder prevention, rope skipping prevention and the like can be realized, and the effect of stable and safe operation is achieved.

The technical scheme is further improved as follows: the rope feeding swing wheel is characterized in that a vertically arranged hollow cylinder is fixedly connected to the outer side of the shell, an upper bearing and a lower bearing are arranged at the upper end and the lower end of the hollow cylinder respectively, an upper shaft column extending upwards is fixedly connected to an inner ring of the upper bearing, a lower shaft column extending downwards is fixedly connected to an inner ring of the lower bearing, the rope feeding swing wheel is installed at the lower end of the lower shaft column, and the rope discharging swing wheel is installed at the upper end of the upper shaft column. When the rope feeding and discharging swinging device is used, the rope feeding swinging wheel and the rope discharging swinging wheel can rotate around the bearing along with the lower shaft column and the upper shaft column, so that the swinging angles of the steel wire rope feeding and discharging can be adjusted; after the adjustment is finished, the swinging angle is kept unchanged through the stress of the steel wire rope.

The technical scheme is further improved as follows: and a stroke limiter is arranged on an output shaft of the speed reducer. Thus, the overtravel of the winding drum is prevented, and the use safety is ensured.

In order to facilitate the installation of the single-point crane, preferably, the side plate is provided with a lifting hole.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the embodiment of the present invention after removing a side plate.

Fig. 2 is a rear view schematic of fig. 1.

Fig. 3 is a schematic left side view of fig. 1.

Fig. 4 is a schematic right view of fig. 1.

Fig. 5 is a schematic top view of fig. 1.

Reference numerals: 1-servo motor, 2-speed reducer, 3-driving gear, 4-rotary gear, 5-side plate, 6-hollow reel, 7-rope-in swinging wheel, 8-rope-out swinging wheel, 9-upper shaft column, 10-stroke limiter, 11-rope pressing device, 12-hollow cylinder, 13-base fixing plate, 14-lifting hole, 15-rotating shaft, 16-connecting plate and 17-lower shaft column.

Detailed Description

Examples

The hollow single-point crane of the present embodiment, as shown in fig. 1 to 5, includes a housing formed by two parallel side plates 5 (for convenience of displaying an internal structure, one of the side plates is removed in fig. 1) and a connecting plate 16 connecting the two side plates 5, a servo motor 1 (as a power source), a speed reducer 2, a rope feeding swinging wheel 7, a hollow winding drum 6, a rope discharging swinging wheel 8, and a gear mechanism formed by a driving gear 3 and a rotating gear 4 that are mutually matched, where the rope feeding swinging wheel 7, the rope discharging swinging wheel 8, the servo motor 1, the speed reducer 2, and the gear mechanism are all installed on the housing, and the servo motor 1, the speed reducer 2, and the gear mechanism are located between the two side plates 5, so as to reduce volume occupation.

When the device is used, an output shaft of the servo motor 1 is connected with an input shaft of the speed reducer 2, the output shaft of the speed reducer 2 extends out to the left side and the right side, and the left extending part and the right extending part of the output shaft are respectively fixedly connected with a driving gear 3, namely the servo motor 1 is used for driving the speed reducer 2 to drive the driving gear 3 to rotate. The shell is provided with a rotating shaft 15 parallel to an output shaft of the speed reducer 2, two ends of the rotating shaft 15 are provided with two rotary gears 4 which are matched with the driving gear 3 and correspond to each other one by one, and the driving gear 3 and the rotary gears 4 form a gear driving mechanism.

The side plate 5 is formed by a high-carbon steel seamless steel tube in a hollow shape and is subjected to finish machining, and as an optimal scheme, two lifting holes 14 are reserved in the side plate 5, so that the side plate is convenient to move, install and use. The shell is provided with a base fixing plate 13 for fixedly mounting the crane in use.

The hollow winding drum 6 is made of a high-carbon steel seamless steel pipe, is subjected to finish machining and chromium plating treatment, is positioned between the two slewing gears 4 and is sleeved on the rotating shaft 15, and the hollow winding drum 6 is fixedly connected with the rotating shaft 15. The rotary gear 4 rotates to drive the hollow winding drum 6 to rotate, so that the stability is high, the concentricity is high, the bearing capacity of the winding drum is greatly improved through gear transmission during operation and loading, and the size of the crane can be further reduced under the same loading condition.

When the lifting hook is used in the embodiment, one end of the steel wire rope connected with the lifting hook penetrates into the hollow winding drum 6 and penetrates out of the hollow winding drum 8 through the rope inlet swinging wheel 7, namely, the steel wire rope is wound in a straight line through the hollow winding drum 6 and runs at a high speed through the rope inlet swinging wheel 7, and reaches a specified lifting point through the rope outlet swinging wheel 8, and the highest speed can reach about 4m/s and is far higher than that of a crane (generally below 1.5 m/s) driven by a screw rod in the prior art.

The embodiment can be further modified as follows:

1) the casing outside fixedly connected with cavity cylinder 12 of a vertical setting, the upper and lower both ends of cavity cylinder 12 are equipped with upper bearing and lower bearing respectively (because upper bearing and lower bearing embedding are in cavity cylinder 12, not shown in the figure), and the inner circle rigid coupling of upper bearing has the upper shaft post 9 that upwards stretches out, the inner circle rigid coupling of lower bearing has the lower shaft post 17 that stretches out downwards, it installs the lower extreme at lower shaft post 17 to advance rope pendulum to take turns 7, it installs the upper end at upper shaft post 9 to go out rope pendulum to take turns 8. Therefore, when the rope feeding swinging wheel 7 and the rope discharging swinging wheel 8 are used, the rope feeding swinging wheel and the rope discharging swinging wheel can respectively rotate along with the lower shaft column 17 and the upper shaft column 9, and the swinging angles of the rope feeding and the rope discharging of the steel wire rope are not limited. The rope inlet swinging wheel 7 and the rope outlet swinging wheel 8 can be made of synthetic materials commonly known as plastic steel, and have the performances of impact resistance, bearing resistance, super wear resistance, high strength and high-speed running. In this embodiment, the rope outlet swinging wheel 8 is limited by the side plate 5, so that the adjustable angle of the rope outlet swinging wheel 8 is 0-120 degrees, and the adjustable angle of the rope inlet swinging wheel 7 is 0-180 degrees.

2) The output shaft of the speed reducer 2 is provided with a stroke limiter 10, and two independent stroke limiters 10 can be arranged to prevent overtravel.

3) The outer periphery of the hollow winding drum 6 is provided with a rope pressing device 11, the rope pressing device 11 is an elastic columnar object arranged in parallel with the hollow winding drum 6, and a gap matched with the outer diameter of the steel wire rope is reserved between the rope pressing device 11 and the hollow winding drum 6. The rope pressing device 11 is preferably made of polyurethane polymer materials, can realize high wear resistance, insulation, electric conduction prevention, rope loosening prevention, rope disorder prevention and rope skipping prevention, and ensures stable and safe operation. The rope presser 11 may be provided in four pieces, which are uniformly distributed around the circumference of the hollow winding drum 6.

The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments can be provided in addition to the above embodiments. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like that are made within the spirit and principle of the present invention are within the scope of the present invention.

Claims

1. A hollow single-point crane comprises a shell, a power source, a rope inlet swinging wheel, a rope outlet swinging wheel and a winding drum, wherein the rope inlet swinging wheel, the rope outlet swinging wheel and the power source are all arranged on the shell; the method is characterized in that: the shell is composed of two parallel side plates and a connecting plate for connecting the two side plates; the power source is a servo motor, an output shaft of the servo motor is connected with an input shaft of a speed reducer, the output shaft of the speed reducer extends out to the left side and the right side, a driving gear is fixedly connected to the left extending part and the right extending part respectively, a rotating shaft parallel to the output shaft of the speed reducer is installed on the shell, two ends of the rotating shaft are provided with two rotary gears which are matched with the driving gear and correspond to the driving gear one by one, and the driving gear and the rotary gears form a gear driving mechanism; the winding drum is a hollow winding drum, the hollow winding drum is positioned between the two rotary gears and sleeved on the rotating shaft, and the hollow winding drum is fixedly connected with the rotating shaft; the servo motor, the hollow winding drum, the speed reducer and the gear driving mechanism are all located between the two side plates.

2. The hollow single point hoist of claim 1, wherein: the rope pressing device is arranged on the shell and is an elastic columnar object arranged in parallel with the hollow winding drum, and a gap is reserved between the rope pressing device and the hollow winding drum.

3. The hollow single point hoist of claim 1, wherein: the rope feeding swing wheel is characterized in that a vertically arranged hollow cylinder is fixedly connected to the outer side of the shell, an upper bearing and a lower bearing are arranged at the upper end and the lower end of the hollow cylinder respectively, an upper shaft column extending upwards is fixedly connected to an inner ring of the upper bearing, a lower shaft column extending downwards is fixedly connected to an inner ring of the lower bearing, the rope feeding swing wheel is installed at the lower end of the lower shaft column, and the rope discharging swing wheel is installed at the upper end of the upper shaft column.

4. The hollow single point hoist of claim 1, wherein: and a stroke limiter is arranged on an output shaft of the speed reducer.

5. The hollow single point hoist of claim 1, wherein: and lifting holes are formed in the side plates.