A hanging plate return device for hanging conveying

Abstract

The present invention belongs to the technical field of conveyors, and specifically relates to a hanging plate return device for hanging conveying; it comprises a track assembly and a plurality of conveying platform assemblies, the track assembly comprises a track mechanism and a tensioning mechanism, the track mechanism comprises two annular tracks arranged in parallel and symmetrically, and a chain track arranged between the two annular tracks, the tensioning mechanism is arranged on the side wall of the annular track, the chain track comprises a chain, the conveying platform assembly comprises a conveying platform, a gear and a slider, the gear and the slider are arranged at the bottom of the conveying platform, the two ends of the conveying platform are slidably arranged on the two annular tracks, the gear is meshed and connected with the chain, the chain is between the gear and the slider, the spacing between the slider and the gear is smaller than the width of the chain, the rear end of the slider is vertically upwardly inclined with an infrared transmitter, and the front end of the slider is vertically arranged with a plurality of infrared receivers; it can quickly adjust the chain and control the distance between the conveying platforms.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyors, and in particular relates to a hanging plate returning device for hanging conveying. Background Art

[0002] The power-free conveyor is a highly efficient material conveying equipment. In industrial production, material conveying is a crucial link, which directly affects production efficiency and product quality. Through its unique working principle and design, the power-free conveyor can achieve efficient, continuous and stable material conveying while having high flexibility and adjustability to meet the needs of different production environments and material characteristics.

[0003] At present, most power-and-free conveyors are installed on the ground. When the conveying distance is long, the power-and-free conveyor needs to occupy a large production site area. Although there are also suspended power-and-free conveyors to reduce the floor space, the installation, commissioning, maintenance and overhaul of such equipment are difficult, and a lot of man-hours are wasted, resulting in a long equipment manufacturing cycle and high equipment maintenance costs.

[0004] The accumulation conveyor is transmitted by chains, and multiple conveyor platforms on the conveyor are driven by the chains. The chains on the conveyor are long and have many links. This will cause the distance between each link to increase after long-term use. The increase in the distance between all the links will form a large cumulative error, causing the entire chain to become longer, thus causing the chain to become loose. Although most of the accumulation conveyors in the prior art are provided with chain tensioning devices for adjusting the tightness of the chain, the chain tensioning devices in the prior art can only be manually determined and adjusted manually by hand. On the one hand, it is difficult to determine whether adjustment is needed and can only be determined through experience. On the other hand, it is difficult to control the adjustment force through manual adjustment, which may lead to misjudgment and cause the conveyor platform to disengage from the chain, which can easily cause safety hazards.

[0005] Based on this, it is necessary to design a hanging plate return device for hanging conveying that can automatically adjust the chain tightness according to needs. Summary of the invention

[0006] In order to solve the problem in the prior art that the tightness of the chain cannot be automatically adjusted, the present invention provides a hanging plate return device for hanging conveying.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A hanging plate return device for hanging transportation of the present invention comprises a track assembly and a plurality of conveyor platform assemblies, the track assembly comprises a track mechanism and a tensioning mechanism, the track mechanism comprises two annular tracks arranged in parallel and symmetrically, a chain track arranged between the two annular tracks, the tensioning mechanism is arranged on the side wall of the annular track, the chain track comprises a chain, the conveyor platform assembly comprises a conveyor platform, a gear and a slider, the gear and the slider are arranged at the bottom of the conveyor platform, the two ends of the conveyor platform are slidably arranged on the two annular tracks, the gear is meshed and connected with the chain, the chain is between the gear and the slider, the distance between the slider and the gear is less than the width of the chain, the rear end of the slider is vertically inclined upwardly provided with an infrared transmitter, and the front end of the slider is vertically arranged with a plurality of infrared receivers;

[0009] Several infrared receivers at the rear of the moving direction adjust the gear rotation or stop according to the irradiation position of the infrared signal received from the front infrared transmitter, which is used to control the rear conveyor platform to stop or advance. The infrared receivers on the two adjacent conveyor platform components receive the infrared transmitter signal to determine the chain tightness, and the tensioning mechanism adjusts the chain tightness according to the reception status of the infrared receiver signal.

[0010] Furthermore, the chain track includes a driving wheel, a driven wheel, a driving shaft and a driven shaft, the driving shaft is rotatably connected to one end of the two circular tracks, the driving wheel is transmission-connected to the driving shaft, the tensioning mechanism is arranged at the other end of the circular track, the driven shaft is rotatably connected to the tensioning mechanism, the driven wheel is transmission-connected to the driven shaft, and the chain transmission is sleeved on the driving wheel and the driven wheel.

[0011] Furthermore, the conveyor platform assembly also includes an electric clutch, which is arranged at the bottom of the conveyor platform. The gear transmission is connected to the electric clutch, and the infrared receivers on two adjacent conveyor platform assemblies receive infrared transmitter signals to instruct the electric clutch to control the gear to be stationary or rotate.

[0012] Furthermore, a level sensor is also provided on the conveyor platform assembly, and the level sensor is used to detect the posture of the conveyor platform. The tensioning mechanism adjusts the chain tension according to the data of the level sensor and the infrared receiver.

[0013] Furthermore, the annular track includes an upper sliding track segment and a lower sliding track segment, both of which are semicircular, the upper sliding track segment and the lower sliding track segment are connected to the upper horizontal track segment on the top, and are connected to the lower horizontal track segment on the bottom, the upper sliding track segment, the upper horizontal track segment and the lower horizontal track segment are all provided with sliding rails and have a smooth transition to each other, the driven shaft is transmission-connected to two auxiliary wheels, and the two auxiliary wheels are slidably abutted against the bottom of the conveying platform for the conveying platform to flip and slide downward.

[0014] Furthermore, the conveyor platform assembly includes an upper pulley group and a lower pulley group, the upper pulley group includes a plurality of cambered wheels, the plurality of cambered wheels are rotatably connected to both sides of the conveyor platform and are rollingly arranged on the slide rail, the lower pulley group includes a plurality of vertical wheels and horizontal wheels, the vertical wheels and horizontal wheels are both rotatably connected to the bottom of the conveyor platform, the vertical wheel rim is rollingly abutted against the auxiliary wheel rim to assist the conveyor platform in rotating along the auxiliary wheel rim surface, and the horizontal wheel is rollingly abutted against the radial surface of the auxiliary wheel to limit the conveyor platform.

[0015] Furthermore, the tensioning mechanism has two groups and is respectively arranged on the outer sides of the two circular tracks. The tensioning mechanism includes a fixed frame, a movable plate, a threaded rod and a tensioning motor. The fixed frame is arranged on the outer side wall of the circular track, and the movable plate is slidably arranged on the fixed frame. One end of the threaded rod is connected to the tensioning motor, and the threaded rod is rotatably connected to the fixed frame and the movable plate. Both ends of the driven shaft are respectively rotatably connected to the movable plates on the two circular tracks. The tensioning motor drives the threaded rod to rotate to adjust the position of the movable plate, and the movement of the movable plate is used to adjust the chain tension.

[0016] Furthermore, it also includes a slide slot bracket, which is connected to the annular track and is located between two annular tracks. A slide slot is opened on the side of the slide slot bracket, and the horizontal section of the chain is slidably arranged in the slide slot.

[0017] Furthermore, it also includes a hanger, the track assembly is arranged on the hanger, and the hanger is detachably connected to the hanging flange on the top of the workshop.

[0018] Furthermore, a protective net is provided below the hanger, and the protective net is used to intercept workpieces that accidentally fall during the workpiece transportation process.

[0019] The beneficial effects of the present invention are as follows: by arranging an infrared transmitter tilted upward at the rear of the slider and arranging a plurality of infrared receivers arranged vertically in front of the slider, the infrared rays of the infrared transmitter on the front conveying platform are irradiated on the infrared receiver on the rear conveying platform to judge whether the chain falls, so as to judge the tightness of the chain, and the tensioning mechanism is instructed to adjust the tightness of the chain through the infrared signal receiving state of the infrared receiver;

[0020] At the same time, the infrared transmitter set obliquely shines on the infrared receivers at different heights at different distances to judge the distance between the two conveyor platforms, and the infrared signal receiving status of the infrared receiver instructs the electric clutch to control the rotation or stillness of the gear to control the stop or movement of the conveyor platform.

[0021] The hanging flange is quickly connected to the hanger to achieve rapid hanging and installation of the equipment. At the same time, equipment debugging, inspection and maintenance can be carried out on the workshop floor, which greatly reduces the equipment manufacturing cycle and reduces the equipment maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 An enlarged structural diagram of the middle tensioning mechanism;

[0026] Figure 4 It is a schematic diagram of the structure of the conveyor platform assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the infrared transmitter and the infrared receiver on the slider of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the workpiece conveying of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the conveyor platform returning of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the protective net of the present invention.

[0031] Legend: 1. Circular track; 2. Chain; 3. Conveyor platform assembly; 31. Conveyor platform; 32. Upper pulley block; 33. Lower pulley block; 34. Gear; 35. Slider; 351. Infrared receiver; 352. Infrared transmitter; 36. Electric suction device; 301. First conveyor platform; 302. Second conveyor platform; 303. Third conveyor platform; 304. Fourth conveyor platform; 305. Fifth conveyor platform; 306. Sixth conveyor platform; 307. 7. Seventh conveyor platform; 308. Eighth conveyor platform; 4. Auxiliary wheel; 5. Tensioning mechanism; 51. Threaded rod; 52. Fixed frame; 53. Tensioning motor; 54. Moving plate; 55. Driven shaft; 6. Hanging flange; 61. Hanging pin; 62. Locking screw; 7. Hanging bracket; 8. Protective net; 9. Workpiece; 901. First workpiece; 902. Second workpiece; 903. Third workpiece; 904. Fourth workpiece; 10. Quick-change hanging box. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] like Figure 1-Figure 8 As shown, a hanging plate return device for hanging conveying of the present invention comprises a track assembly and a plurality of conveying platform assemblies 3, the track assembly comprises a track mechanism and a tensioning mechanism 5, the track mechanism comprises two annular tracks 1 arranged in parallel and symmetrically, a chain track arranged between the two annular tracks 1, the tensioning mechanism 5 is arranged on the side wall of the annular track 1, the chain track comprises a chain 2, the two annular tracks 1 and the middle chain track are all separated by a certain distance, the conveying platform assembly 3 comprises a conveying platform 31, a gear 34 and a slider 35, the gear 34 and the slider 35 are arranged at the bottom of the conveying platform 31, the two ends of the conveying platform 31 are slidably arranged on the two annular tracks 1, and the gear 34 at the bottom is meshed with the chain 2 on the chain track, so that the chain 2 is between the slider 35 and the gear 34, and at the same time, the distance between the gear 34 and the slider 35 is less than the width of the chain 2, so that the chain 2 is difficult to fall off after meshing with the gear 34;

[0034] Since the chain 2 is connected together by many links, and the interconnected parts of each link of the chain 2 will wear during the long-term rotation process, resulting in a larger spacing between each link. When the number of links is sufficient, the wear on each link is small, but the cumulative error generated by multiple links of the entire chain 2 will cause the chain 2 to be stretched. When the wheelbase of the shafts at both ends of the chain 2 remains unchanged, the chain 2 will loosen, causing the middle of the chain 2 to fall under the action of gravity due to lack of support. After the chain 2 is loosened, it may cause the gear 34 to be disengaged during operation.

[0035] Therefore, by setting a plurality of infrared transmitters 352 and a plurality of infrared receivers 351 on the slider 35 at the bottom of the conveying platform 31, the infrared transmitter 352 is set at the rear end of the slider 35, and the infrared receiver 351 is set at the front end of the slider 35. Since the circular track 1 is perpendicular to the horizontal plane, the conveying platform 31 moves horizontally along the circular track 1 first and then flips upward, then moves horizontally and then flips downward to form a loop. Since a plurality of conveying platform assemblies 3 are set on the circular track 1 for conveying workpieces 9, the infrared transmitters 352 and the infrared receivers 351 at the bottom of the plurality of conveying platforms 31 cooperate with each other, so that on the one hand, the tightness of the chain 2 can be detected, and on the other hand, the distance of each conveying platform 31 can be controlled, and the timing of the movement of the conveying platform 31 can also be controlled;

[0036] Specifically, since there are several conveying platforms 31 on the circular track 1, each conveying platform 31 is arranged in sequence, and the infrared transmitter 352 on the conveying platform 31 in the front direction of the moving direction transmits an infrared signal to the infrared receiver 351 of the conveying platform 31 behind. Since the light is propagated in a straight line, when the chain 2 is stretched and loosened, it will fall between the two supporting points, and the height in the middle is lower than the height on both sides. The two sides of the conveying platform 31 are slidably arranged on the circular tracks 1 on both sides, so the height of the conveying platform 31 remains unchanged, and the chain 2 will block the infrared signal after it loosens and falls. The transmission of the external line causes the infrared receiver 351 at the rear to be unable to receive the infrared signal, so the height of the slider 35 can be adjusted as needed, and the tightness of the chain 2 can be judged by the infrared transmitter 352 and the infrared receiver 351 on the slider 35. When the chain 2 blocks the signal of the infrared transmitter 352, since the tensioning mechanism 5 is connected with the infrared receiver 351 by wireless communication, the tensioning mechanism 5 adjusts the tightness of the chain 2 until the chain 2 does not block the infrared and the infrared receiver 351 can receive the infrared signal again.

[0037] On the other hand, since the conveyor platform 31 is in a circular orbit 1, in the process of conveying the workpiece 9, the workpiece 9 needs to be moved from one end of the circular orbit 1 to the other end, and needs to stay briefly at the initial position and the target position to facilitate the picking up of the workpiece 9. In the actual production process, after multiple conveyor platforms 31 move to the target position, they will form an accumulation, that is, several conveyor platforms 31 are connected end to end. In order to control the movement and stop of the conveyor platform 31, a buffer device is provided on the existing conveyor platform 31. When the gear 34 is stationary in the moving state, the conveyor platform 31 The gear 34 rotates freely when the buffer device on the rear conveyor platform 31 hits the buffer device on the front conveyor platform 31. The free rotation of the gear 34 will cause the chain 2 to be unable to provide driving force for the conveyor platform 31, and the conveyor platform 31 stops moving. However, the buffer device on the conveyor platform 31 can only make the gear 34 rotate after the two conveyor platforms 31 contact each other. The body parts hung on the conveyor platform 31 may fall off when they collide. Therefore, in this embodiment, the infrared light source on the conveyor platform 31 at the front The infrared transmitter 352 is tilted upward, and the multiple infrared receivers 351 on the rear conveying platform 31 are arranged vertically. The infrared rays on the infrared transmitter 352 are irradiated on different infrared receivers 351 on the rear conveying platform 31 at different distances between the two conveying platforms 31. The distance between the two conveying platforms 31 is determined by the position of the received infrared rays. When the distance between the two conveying platforms 31 is far, the infrared transmitter 352 in front will irradiate the higher infrared receiver 351 at the rear, and when the distance is close, it will irradiate the lower infrared receiver 351. In the process of the two conveyor platforms 31 moving from far to near, the irradiation height of the infrared transmitter 352 gradually moves from high to low. After the distance between the two conveyor platforms 31 is determined, the conveyor platform 31 at the rear is in a full rotation state, a half rotation state and a stationary state through the control gear 34. When it is not close to the conveyor platform 31 in front, it is in a stationary state, so that the conveyor platform 31 moves forward. After approaching the conveyor platform 31 in front, it is in a half rotation state, so that the conveyor platform 31 slows down, until it contacts the conveyor platform 31 in front, it is in a full rotation state, so that the conveyor platform 31 stops.

[0038] like Figure 6 As shown, the first workpiece 901 is located at the upper position, the second workpiece 902 and the third workpiece 903 are located at the intermediate position, and the fourth workpiece 904 is located at the lower position. The workpiece 9 is suspended and connected to the conveying table 31 through the quick-change hanging box 10. After the conveying table 31 transports the workpiece 9 through the upper position, the intermediate position, and the lower position in sequence, the workpiece 9 and the quick-change hanging box 10 are separated from the conveying table 31, completing the hanging and conveying of the workpiece 9. By replacing different quick-change hanging boxes 10, different workpieces 9 can be produced, which is suitable for flexible co-line production of multiple products.

[0039] In one embodiment, the chain track includes a driving wheel, a driven wheel, a driving shaft and a driven shaft 55. The driving shaft is rotatably connected to one end of the two circular tracks 1, the driving wheel is transmission-connected to the driving shaft, the tensioning mechanism 5 is arranged at the other end of the circular track 1, the driven shaft 55 is rotatably connected to the tensioning mechanism 5, the driven wheel is transmission-connected to the driven shaft 55, the chain 2 is transmission-sleeved on the driving wheel and the driven wheel, the main wheel shaft is connected to a driving motor for driving the chain 2 transmission, and the driven shaft 55 is arranged on the tensioning mechanism 5, and the spacing between the driving shaft and the driven shaft 55 is controlled by adjusting the tensioning mechanism 5 to adjust the tightness of the chain 2.

[0040] In one embodiment, the conveyor platform assembly 3 further includes an electric absorber 36, which is disposed at the bottom of the conveyor platform 31, and the gear 34 is transmission-connected to the electric absorber 36, and the infrared receiver 351 on two adjacent conveyor platform assemblies 3 receives the signal of the infrared transmitter 352 to instruct the electric absorber 36 to control the gear 34 to be stationary or rotated;

[0041] The electric attractor 36 is a device that uses electromagnetic force to achieve attraction and separation. Its working principle is to provide current through the power supply, so that the coil forms a strong magnetic field and generates corresponding magnetic flux. This strong magnetic field will form a strong suction force on the magnet (or iron core), thereby attracting the object. When the power is disconnected, the magnetic force disappears and the object can be easily separated. The electric attractor 36 controls the friction force with the gear 34 by adjusting the magnitude of the electric suction force, and is used to control the rotation or stop of the gear 34. Since the electric attractor 36 is electrically connected to the infrared receiver 351, when the infrared receiver 351 detects that the distance between the two conveying platforms 31 is gradually approaching, the electric attractor 36 controls the gear 34 to be in a full rotation state or a half rotation state, so that the conveying platform 31 gradually slows down until it stops.

[0042] Since the slider 35 is arranged at the bottom of the conveying platform 31, and the gear 34 is located on the side close to the conveying platform 31, the slider 35 is located on the side far from the bottom of the conveying platform 31, and the chain 2 is sleeved on the driving wheel and the driven wheel, so that the driving wheel and the driven wheel form two horizontal parts of the upper and lower sections of the chain 2. When the conveying platform 31 moves to the lower horizontal part of the chain 2, the slider 35 is above the chain 2, and the state of the chain 2 cannot be detected. Only when the conveying platform 31 is flipped and moved to the upper horizontal part can the slider 35 be located below the chain 2. In order to make the detection result more accurate, in one embodiment, the conveying platform assembly 3 is A level sensor is also provided, which is used to detect the posture of the conveyor platform 31. The level sensor is electrically connected to the infrared receiver 351 and wirelessly communicated with the tensioning mechanism 5 through the level sensor, or the infrared receiver 351, the infrared transmitter 352, and the level sensor are connected to the same control module, and then wirelessly communicated with the tensioning mechanism 5 through the control module. Only when the level sensor detects that the conveyor platform 31 is in the upper section of the chain 2, the detection result is output to the tensioning mechanism 5. At the same time, the tensioning mechanism 5 adjusts the tensioning force of the chain 2 according to the data of the level sensor and the infrared receiver 351.

[0043] In one embodiment, the annular track 1 includes an upper sliding track segment and a lower sliding track segment, both of which are semicircular, the upper sliding track segment and the lower sliding track segment are connected to an upper horizontal track segment at the top, and connected to a lower horizontal track segment at the bottom, the upper sliding track segment, the upper horizontal track segment and the lower horizontal track segment are all provided with slide rails and smoothly transition to each other, the driven shaft 55 is transmission-connected to two auxiliary wheels 4, the two auxiliary wheels 4 are in sliding contact with the bottom of the conveying platform 31 for the conveying platform 31 to flip and slide downward;

[0044] Since the forces exerted on the conveyor platform 31 during the process of flipping from bottom to top and from top to bottom are different, when flipping from bottom to top, gravity is overcome by the drive of the chain 2, and the upper sliding track section is arc-shaped, so there is a large outward force on the conveyor platform 31. Therefore, the slide rail of the upper sliding track section is on the outside of the conveyor platform 31, and the slide rail provides an inward support force to the conveyor platform 31. When the conveyor platform 31 passes through the lower sliding track section, it flips from top to bottom. In addition to the driving force provided by the chain 2, and gravity and the driving force are in the same direction, the conveyor platform 31 has a tendency to fall rapidly, resulting in an inward force on the conveyor platform 31. Therefore, the lower sliding track section provides two auxiliary wheels 4 on the driven shaft 55, and the two auxiliary wheels 4 roll and abut against the bottom of the conveyor platform 31, and the two auxiliary wheels 4 provide an outward support force to the conveyor platform 31.

[0045] Since in the above-mentioned embodiment, the shapes of the slide rails of the upper slide rail section and the lower slide rail section are different, in order to reduce the friction between the conveying platform 31 and the slide rail, the shapes of the pulleys matched therewith are also different. Therefore, in one embodiment, the conveying platform assembly 3 includes an upper pulley group 32 and a lower pulley group 33. The upper pulley group 32 includes a plurality of cambered wheels, which are rotatably connected to both sides of the conveying platform 31 and are rollingly arranged on the slide rail. The lower pulley group 33 includes a plurality of vertical wheels and horizontal wheels, which are both rotatably connected to the bottom of the conveying platform 31. The rim of the vertical wheel rolls against the rim of the auxiliary wheel 4 to assist the conveying platform 31 in rotating along the rim surface of the auxiliary wheel 4. The horizontal wheel rolls against the radial surface of the auxiliary wheel 4 to limit the conveying platform 31.

[0046] The arc wheels of the upper pulley group 32 of the conveyor platform 31 are directly placed on the slide rail, and are used to cooperate with the slide rail on the upper horizontal track segment, the upper slide track segment and the lower horizontal track segment, while the lower pulley group 33 is used to abut and cooperate with the auxiliary wheel 4. Therefore, vertical wheels and horizontal wheels are required. The vertical wheels and horizontal wheels form 90 degrees with each other, and the vertical wheels and horizontal wheels respectively roll and abut with the rim surface and radial surface of the auxiliary wheel 4 to reduce friction and limit.

[0047] Since the lower horizontal track segment and the upper sliding track segment have a smooth transition, after the arc wheel of the conveyor platform 31 moves to the highest point of the upper sliding track segment on the slide rail, the upper horizontal track segment is on the outside of the arc wheel, and the upper horizontal track segment is on the inside of the arc wheel. Therefore, the upper sliding track segment and the upper horizontal track segment are staggered, and the width of the arc wheel when sliding to the junction is the same as the diameter of the arc wheel. Therefore, the upper sliding track segment moves to the upper horizontal track segment with a smooth transition.

[0048] like Figure 7 As shown, when the conveyor platform 31 is working, the eight conveyor platforms 31 circulate in a circle in turn, and the return route of the conveyor platform 31 is: passing through the first conveyor platform 301 position, the second conveyor platform 302 position, the third conveyor platform 303 position, the fourth conveyor platform 304 position, the fifth conveyor platform 305 position, the sixth conveyor platform 306 position, the seventh conveyor platform 307 position and the eighth conveyor platform 308 position in turn, and returning to the first conveyor platform 301 position, and repeating the cycle to realize the station change of the conveyor platform 31.

[0049] In one embodiment, the tensioning mechanism 5 has two groups and is respectively arranged on the outer sides of the two circular tracks 1. The tensioning mechanism 5 includes a fixed frame 52, a movable plate 54, a threaded rod 51 and a tensioning motor 53. The fixed frame 52 is arranged on the outer side wall of the circular track 1, and the movable plate 54 is slidably arranged on the fixed frame 52. One end of the threaded rod 51 is connected to the tensioning motor 53. The threaded rod 51 is rotatably connected to the fixed frame 52 and abuts against the movable plate 54. Both ends of the driven shaft 55 are respectively rotatably connected to the movable plates 54 on the two circular tracks 1. The tensioning motor 53 drives the threaded rod 51 to rotate to adjust the position of the movable plate 54, and the movable plate 54 moves to adjust the tension of the chain 2.

[0050] The threaded rod 51 is divided into a threaded section and a smooth section. The smooth section is rotatably connected to the fixed frame 52, while the threaded section is rotatably connected to the movable plate 54. The rotation of the threaded rod 51 drives the movable plate 54 to slide horizontally, thereby realizing the position adjustment of the driven shaft 55.

[0051] In one embodiment, it also includes a slide groove bracket, which is connected to the circular track 1 and is located between two circular tracks 1. A slide groove is opened on the side of the slide groove bracket, and the horizontal part of the lower section of the chain 2 is slidably set in the slide groove. The slide groove bracket is used to limit the chain 2 to prevent the horizontal part of the lower section of the chain 2 from falling, and to prevent the gear 34 from disengaging from the chain 2 after the conveying platform 31 moves to the lower horizontal track section.

[0052] The two circular tracks 1 are an integrated structure, and a plurality of hangers 7 are respectively connected to the outer sides of the two circular tracks 1 , and the circular tracks 1 are hoisted on the top of the working area through the hangers 7 .

[0053] like Figure 8 As shown, the protective net 8 is installed on the hanger 7 and placed directly below the workpiece 9. When the workpiece 9 is suspended and transported, the protective net 8 is used to intercept the workpiece 9 that accidentally falls during the transportation process to prevent safety accidents.

[0054] like Figure 1 As shown, the equipment body of the hanging conveying hanger return device is hung in the air above the production site by a hanger 7, does not occupy the ground area of ​​the production site, and the equipment debugging, overhaul and maintenance can be carried out on the workshop floor. After the equipment debugging or overhaul and maintenance is completed, the hanger 7 is quickly connected to the hanging flange 6 through the hanging pin 61 and the locking screw 62, so as to realize the rapid hanging installation and disassembly of the equipment.

[0055] Working principle: Several conveyor platforms 31 on the circular track 1 are arranged and moved in sequence under the drive of the chain 2. When approaching the upper sliding track section, the conveyor platform 31 needs to pause at this position until the workpiece 9 is taken away because it is necessary to wait for the staff to take away the workpiece 9 on the conveyor platform 31. It can be judged by the gravity sensor that in order to keep the number of conveyor platforms 31 on the upper horizontal track section and the lower horizontal track section equal, the conveyor platform 31 needs to wait for a conveyor platform 31 to slide up before another conveyor platform 31 can slide down when approaching the downward sliding track section. Some conveyor platforms 31 will be piled up at these two positions, so it is necessary to control the gear 34 to rotate or stop through the electric absorber 36, and the action of the electric absorber 36 is controlled by the infrared receiver 351. The infrared transmitter on the conveyor platform 31 in front 352 is tilted and emits infrared rays to the vertically arranged infrared receiver 351 on the rear conveyor platform 31, and judges the distance from the front conveyor platform 31 by the irradiation height of the infrared rays. When gradually approaching the front conveyor platform 31, the electric absorber 36 is used to control the rotation of the gear 34 to decelerate the conveyor platform 31 until it stops; after judging that the conveyor platform 31 has moved to the upper horizontal track section through the level sensor, the infrared transmitter 352 of the front conveyor platform 31 emits infrared rays to the infrared receiver 351 of the rear conveyor platform 31. When the infrared receiver 351 cannot receive the infrared rays, it means that it is blocked by the falling chain 2, which means that the chain 2 is loose, and then a command is sent to the tensioning mechanism 5 through the infrared receiver 351, so that the tensioning mechanism 5 tightens the chain 2 to prevent the chain 2 from loosening and disengaging from the gear 34.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hanging plate return device for hanging transportation, characterized in that: It comprises a track assembly and a plurality of conveyor platform assemblies, wherein the track assembly comprises a track mechanism and a tensioning mechanism, wherein the track mechanism comprises two annular tracks arranged in parallel and symmetrically, and a chain track arranged between the two annular tracks, wherein the tensioning mechanism is arranged on the side wall of the annular track, wherein the chain track comprises a chain, wherein the conveyor platform assembly comprises a conveyor platform, a gear and a slider, wherein the gear and the slider are arranged at the bottom of the conveyor platform, wherein both ends of the conveyor platform are slidably arranged on the two annular tracks, wherein the gear is meshed and connected with the chain, wherein the chain is located between the gear and the slider, wherein the distance between the slider and the gear is smaller than the width of the chain, wherein an infrared transmitter is arranged vertically and upwardly at the rear end of the slider, and a plurality of infrared receivers are arranged vertically and arranged at the front end of the slider; The infrared receiver on the conveyor platform at the rear in the moving direction adjusts the gear rotation or stop according to the infrared signal received from the infrared transmitter on the front conveyor platform, and is used to control the rear conveyor platform to stop or move forward. The infrared receivers on the two adjacent conveyor platform assemblies receive the infrared transmitter signal to determine the chain tightness, and the tensioning mechanism adjusts the chain tightness according to the infrared receiver signal reception status; The conveyor assembly is also provided with a level sensor, which is used to detect the posture of the conveyor, and the tensioning mechanism adjusts the chain tension according to the data of the level sensor and the infrared receiver; when the level sensor detects that the conveyor flips and moves to the upper horizontal part of the chain, the detection result is output to the tensioning mechanism and the tensioning mechanism is instructed to tension the chain; The tensioning mechanism is wirelessly connected to the infrared receiver. The chain blocks the signal of the infrared transmitter, and the tensioning mechanism adjusts the tightness of the chain until the chain does not block the infrared signal and the infrared receiver can receive the infrared signal again.

2. A hanging plate return device for hanging transportation according to claim 1, characterized in that: The chain track also includes a driving wheel, a driven wheel, a driving shaft and a driven shaft. The driving shaft is rotatably connected to one end of the two circular tracks, the driving wheel is transmission-connected to the driving shaft, the tensioning mechanism is arranged at the other end of the circular track, the driven shaft is rotatably connected to the tensioning mechanism, the driven wheel is transmission-connected to the driven shaft, and the chain transmission is sleeved on the driving wheel and the driven wheel.

3. A hanging plate return device for hanging transportation according to claim 1, characterized in that: The conveyor platform assembly also includes an electric absorber, which is arranged at the bottom of the conveyor platform. The gear transmission is connected to the electric absorber. The infrared receivers on two adjacent conveyor platform assemblies receive infrared transmitter signals to instruct the electric absorber to control the gear to be stationary or rotate.

4. A hanging plate return device for hanging transportation according to claim 2, characterized in that: The annular track includes an upper sliding track segment and a lower sliding track segment, both of which are semicircular, the upper sliding track segment and the lower sliding track segment are connected to the upper horizontal track segment at the top, and connected to the lower horizontal track segment at the bottom, the upper sliding track segment, the upper horizontal track segment and the lower horizontal track segment are all provided with slide rails and smoothly transition to each other, the driven rotating shaft is transmission-connected with two auxiliary wheels, and the two auxiliary wheels are slidably abutted against the bottom of the conveying platform for the conveying platform to flip and slide downward.

5. A hanging plate return device for hanging transportation according to claim 4, characterized in that: The conveyor platform assembly includes an upper pulley group and a lower pulley group, the upper pulley group includes a plurality of cambered wheels, the plurality of cambered wheels are rotatably connected to both sides of the conveyor platform and are rollingly arranged on the slide rail, the lower pulley group includes a plurality of vertical wheels and horizontal wheels, the vertical wheels and horizontal wheels are both rotatably connected to the bottom of the conveyor platform, the vertical wheel rim is rollingly abutted against the auxiliary wheel rim for assisting the conveyor platform to rotate along the auxiliary wheel rim surface, and the horizontal wheel is rollingly abutted against the radial surface of the auxiliary wheel for limiting the conveyor platform.

6. A hanging plate return device for hanging transportation according to claim 2, characterized in that: The tensioning mechanism has two groups and is respectively arranged on the outer sides of the two circular tracks. The tensioning mechanism includes a fixed frame, a movable plate, a threaded rod and a tensioning motor. The fixed frame is arranged on the outer side wall of the circular track, and the movable plate is slidably arranged on the fixed frame. One end of the threaded rod is connected to the tensioning motor, and the threaded rod is rotatably connected to the fixed frame and the movable plate. The two ends of the driven shaft are respectively rotatably connected to the movable plates on the two circular tracks. The tensioning motor drives the threaded rod to rotate to adjust the position of the movable plate, and the movement of the movable plate is used to adjust the chain tension.

7. The hanging plate return device for hanging transportation according to claim 1 is characterized in that: It also includes a slide groove bracket, which is connected to the annular track and located between two annular tracks. A slide groove is opened on the side of the slide groove bracket, and the horizontal section of the chain is slidably arranged in the slide groove.

8. The hanging plate return device for hanging transportation according to claim 1 is characterized in that: It also includes a hanger, the track assembly is arranged on the hanger, and the hanger is detachably connected to a hanging flange on the top of the workshop.

9. A hanging plate return device for hanging transportation according to claim 8, characterized in that: A protective net is arranged below the hanger, and the protective net is used to intercept workpieces that accidentally fall during the workpiece conveying process.

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