Stepless rotary cutting device

Abstract

The utility model relates to the field of apertures, in particular to a stepless rotary cutting device which comprises a frame assembly, a main bearing, a cutting assembly and an aperture assembly, the frame assembly comprises a circular track circuit board and a rotary inner fluted disc, and at least four circular conductive tracks are arranged on the upper surface of the circular track circuit board; the cutting assembly is rotationally connected with the frame assembly through a main bearing, a plurality of spring ejector pins are arranged on the back face of the driving plate, each spring ejector pin abuts against one conductive rail, eight cutting motors and a rotating motor are arranged on the cutting assembly, and the rotating motor drives a rotating gear to be matched with a rotating inner fluted disc so that the cutting assembly can rotate. The cutting motor drives the four cutting blades to move around the main light path through the connecting rods. When the cutting device rotates, the cutting device is smooth, stable, free of shaking, low in noise, capable of freely rotating by 360 degrees and free of angle limitation, and the stepless rotating cutting device is simple in structure and compact in design.

Description

Technical Field

[0001] The utility model relates to the field of apertures, in particular to a stepless rotary cutting device. Background Art

[0002] With the development of modern electronic technology, the styles of stage equipment are becoming more and more diverse and complex. Among them, as a lamp with adjustable lighting range, the market requires the size of stage lights to be smaller and smaller, and the internal structure of stage lights is becoming more and more compact. As an important component for stage lights to adjust the lighting range, the cutting disk needs to rotate according to certain requirements inside the stage light, and also needs to realize cutting transformation, so that the light can be transformed in ways such as deformation, swinging or translation.

[0003] However, in the existing cutting disk solutions, the rotating mechanism and the moving mechanism are generally driven by synchronous belts and synchronous wheels, and some also use connecting rods, gears and racks. They all occupy a large space and lack compactness in structural design, which hinders the further reduction of the weight and volume of stage lights.

[0004] In addition, the cutting equipment in the existing stage lights generally has problems such as insufficient running stability, shaking of lights and lamps, and loud working noise when rotating due to the center of gravity offset and uneven force in all directions in the structural design. In addition, the internal transmission structure is prone to jamming, making the light switching process not smooth. Utility Model Content

[0005] In order to overcome the above problems, the utility model provides a stepless rotary cutting device.

[0006] The technical solution adopted by the utility model is: a stepless rotary cutting device, which is arranged at the front end of the main light path of the lamp, and comprises: a frame component, a main bearing, a cutting component and an aperture component;

[0007] The frame assembly comprises a main bracket, a rotating inner gear disc is fixedly provided on the upper part of the main bracket, a bottom bracket is fixedly provided on the lower part of the main bracket, a bearing outer fixing frame is fixedly provided on the upper part of the middle part of the bottom bracket, a ring track circuit board is fixedly provided on the upper side of the bottom bracket, and at least four annular conductive tracks are provided on the upper surface of the ring track circuit board;

[0008] The main bearing is nested in the bearing outer fixing frame, and the four conductive tracks and the main bearing are concentrically arranged;

[0009] The cutting assembly includes a cutter bracket and a driving plate, a plurality of second supporting columns are fixedly provided above the driving plate, and ends of the plurality of second supporting columns away from the driving plate are fixedly connected to the lower surface of the cutter bracket;

[0010] A rotating motor, an aperture motor, eight cutting motors and a cooling fan are fixedly mounted on the cutter bracket, a rotating gear is mounted on the motor shaft of the rotating motor, and one side of the rotating gear abuts against the rotating inner gear disc;

[0011] A bearing inner fixing frame is fixedly provided on the lower side of the middle part of the cutter bracket, and the bearing inner fixing frame sleeve is nested on the inner side of the main bearing;

[0012] The driving plate, the main bracket, the bottom bracket, the inner bearing bracket, the outer bearing bracket and the middle of the ring track circuit board are all provided with a light hole for passing the main light of the lamp;

[0013] Four cutting blades are arranged on the side of the light-through hole, and a first swing arm is rotatably arranged at the left and right ends of each of the four cutting blades. A second swing arm is fixedly arranged on the motor shafts of the eight cutting motors, and each of the first swing arms is rotatably connected to the adjacent second swing arm.

[0014] A plurality of spring ejectors are arranged on the back of the driving plate, each of which abuts against one of the conductive tracks, and at least one spring ejector abuts against each of the conductive tracks. A driving circuit is arranged on the front of the driving plate, and the driving circuit is electrically connected to the rotating motor, the aperture motor, the eight cutting motors and the cooling fan respectively.

[0015] The aperture assembly is arranged on the main light path of the lamp, the aperture assembly is fixedly connected to the cutter bracket, and an aperture rotating gear for driving the aperture assembly to work is fixedly arranged on the motor shaft of the aperture motor.

[0016] Preferably, a plurality of first support columns are fixedly provided on the upper surface of the main support, and ends of the plurality of first support columns away from the main support are fixedly connected to the lower surface of the rotating inner gear disk.

[0017] Preferably, a limiting column is provided on both sides of each of the second swing arms, and the lower ends of the sixteen limiting columns are fixedly connected to the upper surface of the cutter bracket.

[0018] Preferably, a homing magnet is fixedly provided on the lower side of the rotating inner gear disc, and a Hall sensor is fixedly provided on the upper side of the cutter bracket.

[0019] Preferably, two main bearings are provided, the two main bearings are coaxially arranged, and the two main bearings are respectively nested at the upper and lower sides between the inner bearing fixing frame and the outer bearing fixing frame.

[0020] Preferably, the rotating gear is a rubber-covered gear.

[0021] Preferably, eight spring ejectors are provided, and every two spring ejectors form a pair and are symmetrically arranged on both sides of the main bearing, and four pairs of spring ejectors respectively abut against one of the conductive tracks.

[0022] Preferably, a reinforcing bracket is provided on the upper side of the cutter bracket, and the aperture assembly is fixedly connected to the reinforcing bracket.

[0023] Preferably, a data interface is further provided on one side of the ring track circuit board, and the data interface is electrically connected to the ring track circuit board. An interface fixing frame is fixedly provided under the main bracket, and the data interface is fixedly connected to the interface fixing frame.

[0024] Preferably, a first air outlet is provided on the cutter bracket at a position directly opposite to the cooling fan outlet, a wind hood is fixedly provided on the first air outlet, and a second air outlet is provided on the bearing inner fixing frame at a position directly opposite to the cooling fan outlet.

[0025] The beneficial effects of the utility model are:

[0026] (1) The main bearing is driven by a rotating motor to drive the cutter to rotate for cutting. The cutting device rotates smoothly, steadily, without shaking, and with low noise. It can rotate 360 ​​degrees freely without angle restrictions. The stepless rotating cutting device has a simple structure and a compact design. The overall design is an independent module, making the installation and maintenance of the lamp more convenient.

[0027] (2) Through the cooperation of the four circular conductive tracks on the PCB board and the spring ejector pins, the cutting device can rotate 360 ​​degrees freely without angle restrictions while providing power and communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0030] Figure 2 This is an exploded view of the frame assembly of the second embodiment of the present utility model;

[0031] Figure 3 This is an exploded view of the cutting assembly of the second embodiment of the present utility model.

[0032] In the figure: 11, main bracket; 12, first support column; 13, rotating inner gear disk; 14, bottom bracket; 15, ring track circuit board; 16, conductive track; 17, data interface; 18, interface fixing frame; 21, cutter bracket; 22, rotating gear; 23, second support column; 24, drive plate; 25, spring ejector; 26, aperture rotating gear; 27, rotating motor; 28, aperture motor; 29, reinforcing bracket; 30, cutting motor; 31, cutting blade; 32, first swing arm; 33, second swing arm; 34, cooling fan; 35, first air outlet; 37, wind hood; 38, homing magnet; 41, main bearing; 42, bearing inner fixing frame; 43, bearing outer fixing frame; 51, aperture assembly. DETAILED DESCRIPTION

[0033] 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 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.

[0034] See also Figure 1 , is the first embodiment of the utility model, and this embodiment specifically discloses a stepless rotary cutting device, which is installed at the front end of the main light path of the lamp and is used to cut the output light of the lamp, and specifically includes a frame assembly, a main bearing 41, a cutting assembly and an aperture assembly 51;

[0035] The frame assembly includes a main bracket 11, a rotating inner gear disc 13 is fixedly provided on the upper part of the main bracket 11, a bottom bracket 14 is fixedly provided on the lower part of the main bracket 11, a bearing outer fixing frame 43 is fixedly provided on the upper part of the middle part of the bottom bracket 14, a ring track circuit board 15 is fixedly provided on the upper side of the bottom bracket 14, and at least four annular conductive tracks 16 are provided on the upper surface of the ring track circuit board 15; the conductive track 16 can be an annular pad printed on the circuit board, or a metal ring attached to the upper surface of the flat plate, as long as it can play the role of wear resistance and conductivity after abutting against the spring ejector pin 25, and it is simple to obtain and low in cost.

[0036] The main bearing 41 is nested in the bearing outer fixing frame 43, and the four conductive tracks 16 and the main bearing 41 are concentrically arranged;

[0037] The cutting assembly includes a cutter bracket 21 and a driving plate 24, a plurality of second supporting columns 23 are fixedly provided above the driving plate 24, and the ends of the plurality of second supporting columns 23 away from the driving plate 24 are fixedly connected to the lower surface of the cutter bracket 21;

[0038] A rotating motor 27, an aperture motor 28, eight cutting motors 30 and a cooling fan 34 are fixedly mounted on the cutter bracket 21. Ten first through holes are arranged on the cutter bracket 21. The motor shafts of the rotating motor 27, the aperture motor 28 and the eight cutting motors 30 all pass through the first through holes. A rotating gear 22 is arranged on the motor shaft of the rotating motor 27. One side of the rotating gear 22 abuts against the rotating inner gear disc 13.

[0039] A bearing inner fixing frame 42 is fixedly provided on the lower middle side of the cutter bracket 21, and the bearing inner fixing frame 42 is nested inside the main bearing 41;

[0040] The driving plate 24, the main bracket 11, the bottom bracket 14, the inner bearing bracket 42, the outer bearing bracket 43 and the middle of the ring track circuit board 15 are all provided with a light hole for passing the main light of the lamp;

[0041] Four cutting blades 31 are arranged on the side of the light-through hole, and the cutting blades 31 are symmetrically arranged in four directions, front, back, left, and right, with two blades on the top and two blades on the bottom overlapping each other. A first swing arm 32 is arranged at each of the left and right ends of the four cutting blades 31, and the eight first swing arms 32 are rotatably connected to the cutting blades 31. Second swing arms 33 are fixedly arranged on the motor shafts of the eight cutting motors 30, and one end of each first swing arm 32 away from the cutting blade 31 is rotatably connected to one end of the adjacent second swing arm 33 away from the cutting motor 30.

[0042] A plurality of spring pins 25 are provided on the back of the driving plate 24, each of which is in contact with one of the conductive tracks 16, and at least one spring pin 25 is in contact with each of the conductive tracks 16. A driving circuit is provided on the front of the driving plate 24, and the driving circuit is electrically connected to the rotating motor 27, the aperture motor 28, the eight cutting motors 30 and the cooling fan 34 respectively.

[0043] The aperture assembly 51 is arranged on the main light path of the lamp, and the aperture assembly 51 is fixedly connected to the cutter bracket 21 . An aperture rotating gear 2622 for driving the aperture assembly 51 to work is fixedly arranged on the motor shaft of the aperture motor 28 .

[0044] This embodiment uses two cutting motors 30 to drive a cutting blade 31, and specifically adopts a first swing arm 32 and a second swing arm 33 that are connected in rotation, so that the cutting blade 31 moves forward or backward under the joint action of the two cutting motors 30, so that the four cutting blades 31 move separately to block the main light path, thereby achieving a complex cutting effect or an effect of translating the lighting range.

[0045] The main bearing 41 is driven by the rotating motor 27 to drive the cutter to rotate for cutting. The cutting device rotates smoothly, steadily, without shaking, and with low noise. It can rotate freely 360 degrees without angle restrictions. The stepless rotating cutting device has a simple structure and a compact design. The whole is designed as an independent module, making the installation and maintenance of the lamp more convenient.

[0046] Through the cooperation of the four circular conductive tracks 16 of the PCB board and the spring ejector pins 25, the cutting device can rotate freely 360 degrees while power supply and communication are being performed. The power supply and communication signals will not be terminated, thus avoiding the problem of limited rotation angle due to wire entanglement, and there is no angle limitation.

[0047] See also Figure 2 and Figure 3 , is the second embodiment of the utility model. The difference between this embodiment and the first embodiment is that a plurality of first support columns 12 are fixedly provided on the upper surface of the main bracket 11, and the ends of the plurality of first support columns 12 away from the main bracket 11 are fixedly connected to the lower surface of the rotating inner gear disk 13.

[0048] Each of the two sides of the second swing arm 33 is provided with a limit column, and the lower ends of the sixteen limit columns are fixedly connected to the upper surface of the cutter bracket 21. Each time the stepless rotary cutting device is turned on and initialized, the cutter is assumed to be in the open state, that is, the eight cutting motors 30 automatically rotate to retract the cutting blade 31 until the second swing arm 33 abuts the outer limit column. The current change output by the drive circuit determines that the cutting motor 30 has returned to its original position, thereby determining the rotation zero point of the cutting motor 30, and then confirming the cutting position, so that the drive circuit can accurately control the opening and closing angle of the cutting blade 31. The second swing arm 33 abuts the outer limit column to limit the maximum stroke of the second swing arm 33 to prevent the cutting blade 31 from being damaged due to excessive rotation angle when the return error occurs. The cutting assembly of this embodiment uses a high-precision 36 stepper motor, and the drive circuit is provided with a 2209 stepper motor drive module, and the drive step loss rate range is smaller.

[0049] In this embodiment, a return magnet 38 is fixedly provided on the lower side of the rotating inner toothed disc 13, and a Hall sensor is fixedly provided on the upper side of the cutter bracket 21. The Hall sensor and the return magnet 38 sense each other during self-check rotation. When the Hall sensor is triggered, the cutting assembly rotates to the zero angle. Each time the cutting disc is turned on and initialized, a default position state is set. When the Hall sensor and the return magnet 38 sense low-level signals during self-check rotation, they are in the default position of positioning stop.

[0050] In this embodiment, two main bearings 41 are provided. The two main bearings 41 are coaxially arranged, and the two main bearings 41 are respectively embedded in the upper and lower sides between the inner bearing fixing frame 42 and the outer bearing fixing frame 43. The configuration of two bearings makes the overall rotation structure of the cutting device more stable, can better withstand and offset the deflection force during rotation, and is convenient for design and assembly.

[0051] The main support 11 and the cutter support 21 of the present embodiment are both made of high-strength hard aluminum, and are light and strong.

[0052] The rotating gear 22 is a rubber-coated gear, which can reduce vibration during rotation and make the rotation smoother.

[0053] In this embodiment, eight spring pins 25 are provided. Every two spring pins 25 form a pair and are symmetrically arranged on both sides of the main bearing 41 . The four pairs of spring pins 25 abut against one of the conductive tracks 16 , respectively.

[0054] Preferably, eight spring pins 25 are evenly arranged in eight directions, and the central angle between two adjacent spring pins 25 is 45 degrees, so that when the spring pins 25 abut against the conductive track 16, the circuit board at both side points is subjected to more uniform force, thereby avoiding the structure of the cutting device from being skewed due to uneven distribution of the elastic force of the pins.

[0055] A reinforcing bracket 29 is provided on the upper side of the cutter bracket 21, and the aperture assembly 51 is fixedly connected to the reinforcing bracket 29. The reinforcing bracket 29 is used to further limit the movement space of the cutting blade 31, and can also enhance the structural strength of the cutter bracket 21 to ensure that the cutter bracket 21 fixed with multiple stepper motors will not bend excessively after being stressed. At the same time, 10 bearings are also provided on the reinforcing bracket 29, which are respectively sleeved on the shafts of eight cutting motors 30, one rotating motor 27 and one aperture motor 28, so as to increase the stability of the bearings when the stepper motors are working and disperse the stress on the bearings.

[0056] A data interface 17 is also provided on one side of the ring track circuit board 15 , and the data interface 17 is electrically connected to the ring track circuit board 15 . An interface fixing frame 18 is fixedly provided under the main bracket 11 , and the data interface 17 is fixedly connected to the interface fixing frame 18 .

[0057] A first air outlet 35 is provided on the cutter bracket 21, facing the air outlet of the cooling fan 34. A wind hood 37 is fixedly provided on the first air outlet 35. The wind hood 37 is used to direct the airflow blown out of the first air outlet 35 toward the main light path. A second air outlet is provided on the bearing inner fixing frame 42, facing the air outlet of the cooling fan 34, for air cooling of the entire stepless rotary cutting device, mainly the light-receiving part on the main light path.

[0058] Each cutting blade 31 is provided with at least one protrusion, and the cutter bracket 21 is provided with a slide fixing plate. The slide fixing plate is provided with at least four slides matching with the protrusions. The protrusions move in the slides to limit the movement trajectory of the cutting blade 31.

[0059] The length of all the second support columns 23 is greater than , leaving enough heat dissipation space between the drive plate 24 and the motor to prevent the heat of the motor and the drive circuit from being transferred to each other, resulting in excessive heat accumulation in the middle of the entire device.

[0060] A wiring through hole is provided on one side of the bottom bracket 14 of the present embodiment for passing a wire and a plug between the data interface 17 and the ring track circuit board 15 .

[0061] The data interface 17 of this embodiment adopts a DB interface, which is convenient for connecting with an existing mainboard and power supply in the lamp.

[0062] The cutting device of the present embodiment is driven by the meshing of a rubber gear and a rack. Compared with the existing technology that commonly uses a synchronous belt and gear drive, the solution adopted in the present embodiment is more convenient to install and maintain. There is no need to adjust the tightness of the belt, and there is no need to worry about the synchronous belt loosening due to long-term use of the lamp. There is no need for a tensioning mechanism, and there will be no problem of the synchronous belt wearing out and shedding debris and fibers.

[0063] The above specific embodiments further describe the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above are only specific embodiments of the utility model and are not intended to limit the protection scope of the utility model. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A stepless rotary cutting device, arranged at the front end of the main light path of the lamp, characterized in that: include: frame assembly, main bearing, cutting assembly and aperture assembly; The frame assembly comprises a main bracket, a rotating inner gear disc is fixedly provided on the upper part of the main bracket, a bottom bracket is fixedly provided on the lower part of the main bracket, a bearing outer fixing frame is fixedly provided on the upper part of the middle part of the bottom bracket, a ring track circuit board is fixedly provided on the upper side of the bottom bracket, and at least four annular conductive tracks are provided on the upper surface of the ring track circuit board; The main bearing is nested in the bearing outer fixing frame, and the four conductive tracks and the main bearing are concentrically arranged; The cutting assembly includes a cutter bracket and a driving plate, a plurality of second supporting columns are fixedly provided above the driving plate, and ends of the plurality of second supporting columns away from the driving plate are fixedly connected to the lower surface of the cutter bracket; A rotating motor, an aperture motor, eight cutting motors and a cooling fan are fixedly mounted on the cutter bracket, a rotating gear is mounted on the motor shaft of the rotating motor, and one side of the rotating gear abuts against the rotating inner gear disc; A bearing inner fixing frame is fixedly provided on the lower side of the middle part of the cutter bracket, and the bearing inner fixing frame sleeve is nested on the inner side of the main bearing; The driving plate, the main bracket, the bottom bracket, the inner bearing bracket, the outer bearing bracket and the middle of the ring track circuit board are all provided with a light hole for passing the main light of the lamp; Four cutting blades are arranged on the side of the light-through hole, and a first swing arm is rotatably arranged at the left and right ends of each of the four cutting blades. A second swing arm is fixedly arranged on the motor shafts of the eight cutting motors, and each of the first swing arms is rotatably connected to the adjacent second swing arm. A plurality of spring ejectors are arranged on the back of the driving plate, each of which abuts against one of the conductive tracks, and at least one spring ejector abuts against each of the conductive tracks. A driving circuit is arranged on the front of the driving plate, and the driving circuit is electrically connected to the rotating motor, the aperture motor, the eight cutting motors and the cooling fan respectively. The aperture assembly is arranged on the main light path of the lamp, the aperture assembly is fixedly connected to the cutter bracket, and an aperture rotating gear for driving the aperture assembly to work is fixedly arranged on the motor shaft of the aperture motor.

2. The stepless rotary cutting device according to claim 1, characterized in that: A plurality of first support columns are fixedly provided on the upper surface of the main support, and ends of the plurality of first support columns away from the main support are fixedly connected to the lower surface of the rotating inner gear disk.

3. The stepless rotary cutting device according to claim 1, characterized in that: A limiting column is respectively provided on both sides of each of the second swing arms, and the lower ends of the sixteen limiting columns are fixedly connected to the upper surface of the cutter bracket.

4. The stepless rotary cutting device according to claim 1, characterized in that: A homing magnet is fixedly provided on the lower side of the rotating inner gear disc, and a Hall sensor is fixedly provided on the upper side of the cutter bracket.

5. The stepless rotary cutting device according to claim 1, characterized in that: The main bearings are provided with two, the two main bearings are coaxially arranged, and the two main bearings are respectively embedded in the upper and lower sides between the inner bearing fixing frame and the outer bearing fixing frame.

6. The stepless rotary cutting device according to claim 1, characterized in that: The rotating gear is a rubber-covered gear.

7. The stepless rotary cutting device according to claim 1, characterized in that: There are eight spring ejectors, and every two spring ejectors form a pair and are symmetrically arranged on both sides of the main bearing. The four pairs of spring ejectors are respectively in contact with one of the conductive tracks.

8. The stepless rotary cutting device according to claim 1, characterized in that: A reinforcing bracket is provided on the upper side of the cutter bracket, and the aperture assembly is fixedly connected to the reinforcing bracket.

9. The stepless rotary cutting device according to claim 1, characterized in that: A data interface is also provided on one side of the ring track circuit board, and the data interface is electrically connected to the ring track circuit board. An interface fixing frame is fixedly provided under the main bracket, and the data interface is fixedly connected to the interface fixing frame.

10. The stepless rotary cutting device according to claim 1, characterized in that: A first air outlet is provided on the cutter bracket at a position directly opposite to the air outlet of the cooling fan, a wind hood is fixedly provided on the first air outlet, and a second air outlet is provided on the bearing inner fixing frame at a position directly opposite to the air outlet of the cooling fan.

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