Rotary push-pull folding vertical lift device

Abstract

The application discloses a rotary push-pull folding vertical lifting device, which is provided with an eccentric transmission structure, the eccentric transmission structure comprises an inner wheel, a bearing and an outer wheel, the inner wheel is provided with an eccentric hole, a driving shaft of a driving device is assembled in the eccentric hole and drives the inner wheel to rotate around the eccentric hole, the bearing is arranged between the outer wheel and the inner wheel, and the outer wheel drives a rotary arm to rotate; wherein the bearing comprises two flange plates, a plurality of cylindrical rollers and connecting pieces, the two flange plates are fixedly connected through the connecting pieces, the two ends of the roller are rotatably installed on the flange plates on the same side, and the two end portions of the roller are provided with balls, and the balls protrude from the end faces of the end portions of the roller. Most of the bearings in the prior art are concentric circle structures and only play a role in reducing friction, while the application utilizes the eccentric hole to realize the eccentric transmission structure to reduce friction while transmitting, has obvious progress, and reduces the abrasion between the inner wheel, the outer wheel and the flange plate, thereby prolonging the service life of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting devices, in particular to a rotary, push-pull, foldable and vertical lifting device. Background Art

[0002] Disposable plastic tableware for daily use, such as disposable cups, bowls, plates, lids, boxes and other products, has two main production methods in the existing technology. The first is injection molding, and the other is punching and shearing of sheet thermoforming machines. The lower mold of the existing cup making machine adopts a hydraulic opening and closing mechanism and uses hydraulics as the mold closing power source. The hydraulic cylinder output process has large speed fluctuations and large impact force, which leads to defects such as difficulty in processing and high machining precision. Publication No. CN111847338A discloses a multi-tonnage large-amplitude lifting device with a lever push-pull structure, wherein the lower rotating support seat is fixed to a stationary base, the lower rotating support seat and the lower end of the lower lifting crank are relatively rotatably connected through a hinge shaft, the upper end of the lower lifting crank is relatively rotatably connected to the positioning rotating sliding lever crank through a hinge shaft, the upper end of the positioning rotating sliding lever crank is hinged to the lower end of the upper lifting crank through a hinge shaft, the upper end of the upper lifting crank is relatively rotatably connected to the lower end of the upper connecting seat through a hinge shaft, and the upper connecting seat is fixed. At the bottom of the object being lifted, the positioning lifting shaft is installed on the positioning rotating sliding lever crank and the positioning lifting shaft is installed with a vertical lifting limit slide. The vertical lifting limit slide is slidably mounted on the stationary support seat, forming a vertical lifting structure in which the three points of the hinged shaft connecting the lower lifting crank and the lower rotating support seat, the positioning lifting shaft, and the hinged shaft connecting the vertical lifting limit slide and the upper connecting seat are always in a straight line; the lower tail end of the positioning rotating sliding lever crank and one end of the lever pressure and pull lifting crank are relatively rotatably connected through an axis; the other end of the lever pressure and pull lifting crank is driven to move by a push-pull drive mechanism. This technology has effectively solved the technical problem of how to achieve fast and long-stroke lifting of large tonnage loads, but there are still problems such as occasional discomfort and easy wear of equipment due to large resistance.

[0003] Therefore, in view of the problems existing in the prior art, there is an urgent need to provide a technology with low resistance, smooth operation and equipment that is not prone to wear. Summary of the Invention

[0004] The purpose of the present invention is to avoid the shortcomings of the prior art and provide a rotating, pushing, folding and vertical lifting device with low resistance, smooth operation and low wear.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] Provided is a rotary push-pull folding vertical lifting device, comprising a driving device, an upper connecting seat, an upper folding arm, a rotating arm, a lower folding arm, a lower connecting seat, a positioning lifting shaft, a lifting limit sliding member and a lifting limit seat. The upper connecting seat, the upper folding arm, the rotating arm, the lower folding arm and the lower connecting seat are sequentially connected and can be relatively moved. The driving device drives one end of the rotating arm to rotate. An eccentric transmission structure and a push-pull lifting shaft are also provided.

[0007] The eccentric transmission structure includes an inner wheel, a bearing and an outer wheel. The inner wheel is provided with an eccentric hole. The drive shaft of the driving device is assembled in the eccentric hole and drives the inner wheel to rotate around the eccentric hole. The bearing is arranged between the outer wheel and the inner wheel. The outer wheel is provided with a connecting ear. The push-pull lifting shaft passes through the rotating arm and the lower folding arm and is connected to the connecting ear of the outer wheel to drive the rotating arm to rotate. The bearing includes two flange plates, multiple cylindrical bearing rollers and a connecting piece. The two flange plates are fixedly connected by the connecting piece. The two ends of the bearing roller are respectively rotatably mounted on the flange plate on the same side, and the two ends of the bearing roller are provided with roller end balls. The roller end balls protrude from the end surface of the bearing roller end.

[0008] The two ends of the positioning lifting shaft pass through the rotating arm and are rotatably connected to the lifting limit sliding piece. The lifting limit sliding piece is vertically slid into the slide groove of the lifting limit seat. Two rows of roller assemblies are respectively arranged on both sides of the slide groove of the lifting limit seat. Each row of roller assemblies is composed of multiple slide groove rollers arranged in sequence from top to bottom.

[0009] Preferably, a bearing body installed on the upper connecting seat is also provided, and load-bearing translational sliding components are respectively provided on the two outer side surfaces of the bearing body. The load-bearing translational sliding components include a supporting groove rail, multiple rolling shafts and a sliding plate. The multiple rolling shafts are rotatably installed inside the supporting groove rail and arranged in sequence. The sliding plate is fixed to the bearing body and a convex strip is provided at the bottom of the sliding plate. When the sliding plate covers the supporting groove rail, the convex strip of the sliding plate slides on the multiple rolling shafts.

[0010] Preferably, the driving device includes a motor and a reduction gearbox, the power output shaft of the reduction gearbox is the driving shaft, the power output shaft passes through the eccentric hole of the eccentric transmission structure and both ends are rotatably mounted on the bearing seat; a gear set is provided inside the reduction gearbox, the gear set consists of a plurality of meshing transmissions, one end of the gear set is connected to the power output shaft, and the other end extends outward to the outside of the bearing seat to be connected to the rotating shaft of the motor.

[0011] Preferably, inner wheel limiting balls are provided on both side surfaces of the inner wheel.

[0012] Preferably, the connecting member includes a fastening column and two screws, the two ends of the fastening column are respectively connected to the two flange plates, and the two screws respectively pass through the flange plates on the same side and are threadedly connected to the fastening column.

[0013] Preferably, a cover plate is also provided, a limiting portion is provided on one side of the outer wheel, the bearing is installed inside the outer wheel and located on the inner side of the limiting portion, the inner wheel is installed on the inner ring of the bearing, and the cover plate is located outside the inner wheel and the bearing and is fixed to the outer wheel.

[0014] Preferably, the upper connecting seat, the upper folding arm, the rotating arm, the lower folding arm and the lower connecting seat that are relatively rotatably connected in sequence from top to bottom constitute a group of folding and lifting units, one of the lower part of the upper connecting seat and the upper part of the upper folding arm is provided with a supporting shaft rotating component and a stop cover is installed on the outer side of the supporting shaft rotating component, and the other component is fixed with a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the end of the rotating shaft; the two ends of the rotating shaft are respectively installed in the aforementioned two supporting shaft rotating components and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side;

[0015] One of the lower part of the upper folding arm and the upper part of the rotating arm is provided with a support shaft rotating component, and a stop cover is installed on the outer side of the support shaft rotating component. The other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two support shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side;

[0016] One of the lower part of the rotating arm and the upper part of the lower folding arm is provided with a support shaft rotating component and a stop cover is installed on the outer side of the support shaft rotating component. The other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two support shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side;

[0017] One of the lower part of the lower folding arm and the upper part of the lower connecting seat is provided with a support shaft rotating component, and a stop cover is installed on the outer side of the support shaft rotating component. The other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two support shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side;

[0018] The end of the positioning lifting shaft passing through the lifting limit sliding member is installed with a shaft end ball, and the shaft end ball protrudes from the end of the positioning lifting shaft;

[0019] The rotating parts of the supporting shaft are bearings or copper sleeves.

[0020] Preferably, a power-assisted lifting buffer device is further provided, which includes a lifting support frame, a driven component, a lifting component and a lifting drive component;

[0021] The lifting drive assembly includes a driving source, a transmission assembly and a lifting drive shaft. The driving source drives the lifting drive shaft to rotate through the transmission assembly. Both sides of the lifting drive shaft are provided with driving bevel gears.

[0022] The driven component includes a bearing seat and a transmission rod. The transmission rod is fixed to the lifting support frame through the bearing seat. Transmission bevel gears are respectively provided at both ends of the transmission rod. The transmission bevel gear at one end of the transmission rod meshes with the driving bevel gear of the lifting drive shaft, and the other end is connected to the lifting component.

[0023] The lifting assembly includes a lifting umbrella gear, a lifting rack and a lifting gear. The lifting gear and the lifting umbrella gear are installed on the same shaft. The lifting umbrella gear is engaged with the transmission umbrella gear at one end of the transmission rod for transmission. The lifting gear is engaged with the lifting rack for transmission connection. A buffer is installed on the upper end of the lifting rack.

[0024] Preferably, the driving source is a cylinder, the transmission assembly consists of a driving rack and a transmission gear, the driving rack is installed on the telescopic rod of the cylinder, the transmission gear is installed on the lifting drive shaft, and the transmission gear is meshed with the driving rack.

[0025] Beneficial effects of the present invention:

[0026] (1) Compared with the prior art, the rotary push-pull folding vertical lifting device of the present invention is provided with a rotary arm that rotates and drives the upper and lower folding arms. The connection hole of the upper folding arm is connected to the lower lifting mold table (a component of the cup making machine, or other components) that can be lifted and lowered. The rotation of the rotary arm can drive the rotation of the upper and lower folding arms to achieve folding or stretching and lifting. In order to make the lifting operation smooth and avoid jamming, the eccentric transmission structure of the present invention includes an inner wheel, a bearing and an outer wheel. The bearing is arranged between the outer wheel and the inner wheel, and the outer wheel drives the rotary arm to rotate; wherein, the bearing includes two flange plates, multiple cylindrical rollers and a connecting piece. The two flange plates are fixedly connected by the connecting piece. The two ends of the roller are rotatably mounted on the flange plates on the same side, and the ends of the roller are provided with balls, and the balls protrude from the end faces of the roller ends. Most of the bearings in the prior art are concentric circle structures that only play the role of reducing friction. The present invention uses eccentric holes to realize an eccentric transmission structure that reduces friction while transmitting, which is a significant improvement. Furthermore, the present invention provides a uniquely structured bearing with multiple cylindrical rollers and roller end balls at both ends of the rollers. This not only significantly reduces the friction between the outer side of the inner wheel and the inner side of the outer wheel, but also the friction between the two side surfaces of the inner wheel and the flange plate, making the relative movement between the inner and outer wheels smoother. At the same time, inner wheel limit balls are provided on both sides of the inner wheel to reduce wear between the inner and outer wheels and the flange plate, thereby extending the service life of the equipment. In addition, the present invention chooses to install the push-pull lifting shaft at the connection point between the lower hole of the rotating arm and the lower arm to minimize the lifting rotation radius, allowing the upper folding arm, rotating arm, and lower folding arm to fold or extend forward and backward when the eccentric wheel's rotation and lifting circumference is small, thereby achieving a lifting stroke nearly twice that of traditional technologies.

[0027] (2) In the present invention, two rows of roller assemblies are provided on either side of the chute of the lifting limit seat, each row of roller assemblies consisting of a plurality of rollers arranged in sequence from top to bottom. Because the roller assemblies are provided in the chute of the lifting limit seat, the lifting limit sliding member can smoothly drive the positioning lifting shaft to move up and down smoothly and steadily. The chute rollers installed on both sides of the chute of the lifting limit seat of the present invention effectively reduce frictional resistance.

[0028] (3) In order to accommodate the low-friction sliding of a loaded device that requires reciprocating motion (such as the lower mold of a thermoforming machine), the present invention provides a load-bearing translational sliding assembly on both outer sides of the guide rail of the lifting mold platform. The load-bearing translational sliding assembly includes a support groove rail, multiple rolling shafts, and a sliding plate. The multiple rolling shafts are rotatably mounted inside the support groove rail and arranged in sequence. The bottom of the sliding plate is provided with a convex strip. When the sliding plate covers the support groove rail, the convex strip of the sliding plate slides on the multiple rolling shafts. The sliding plate can carry the loaded device (such as the lower mold of a thermoforming machine) to slide along the rolling shafts in the support groove rail. Since the rolling friction is much smaller than the sliding friction, the present invention can carry a loaded device of larger tonnage and enable the loaded device to slide smoothly.

[0029] (4). Generally speaking, the outer diameter of the shaft is larger than the inner diameter, which cannot meet the requirements of the installation and relative rotation of the upper folding arm, the rotating arm and the lower folding arm. In particular, the inner diameter of the rotating shaft cannot meet the load-bearing capacity of dozens of tons. However, all the rotating shafts of the present invention are processed with limited ball holes at both ends to install the balls at the end of the rotating shaft. After installation, the shaft, the inner ring of the bearing and the balls at the end of the rotating shaft will not move back and forth, which can meet the requirements of carrying a weight of dozens of tons.

[0030] (5) The present invention is also equipped with a power-assisted lifting and lowering buffer device to solve the buffering problems of large upward resistance and large downward impact force. The buffer of the power-assisted lifting and lowering buffer device of the present invention can be adjusted in height as needed to meet different height requirements, which is more flexible. The power-assisted lifting and lowering buffer device of the present invention also solves the problem of the prior art of installing cylinders on either side of the mold platform as buffer devices, which is prone to uneven air supply between the two cylinders or jamming caused by failure of any one cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0033] Figure 2 It is a structural schematic diagram of a reduction gearbox (composed of a gear set inside) used in one embodiment of the present invention.

[0034] Figure 3 It is a structural schematic diagram of an embodiment of the present invention using another reduction gearbox.

[0035] Figure 4 yes Figure 3 Schematic diagram of the reduction gearbox in the raised state with the outer casing removed.

[0036] Figure 5 It is a schematic structural diagram of a lifting limit seat according to an embodiment of the present invention.

[0037] Figure 6 It is a schematic diagram of an exploded decomposition of an eccentric transmission structure according to one embodiment of the present invention.

[0038] Figure 7 It is a schematic diagram of the bearing structure of an eccentric transmission structure according to an embodiment of the present invention.

[0039] Figure 8 It is a schematic diagram of the bearing roller structure of an embodiment of the present invention.

[0040] Figure 9 It is a schematic diagram of the connector structure of an embodiment of the present invention.

[0041] Figure 10 It is a schematic diagram of an embodiment of the present invention applied to the lifting of the lower mold of a thermoforming machine.

[0042] Figure 11 It is a schematic diagram of an embodiment of the present invention provided with a carrying body (elevating mold platform).

[0043] Figure 12 It is a structural schematic diagram of an embodiment of the present invention provided with a load-bearing translational sliding assembly.

[0044] Figure 13 is another schematic diagram of an embodiment of the present invention.

[0045] Figure 14 It is a schematic structural diagram of a power-assisted lifting and buffering device according to an embodiment of the present invention.

[0046] Figure 15 It is a schematic diagram of the application of the present invention in a thermoforming machine.

[0047] Figure 16 It is a schematic structural diagram of a power-assisted lifting and buffering device according to another embodiment of the present invention.

[0048] exist Figures 1 to 16 These include:

[0049] 1 driving device, 1-1 driving shaft, 2 upper connecting seat, 3 upper folding arm, 4 rotating arm, 5 lower folding arm, 6 lower connecting seat, 7 base, 8 positioning lifting shaft, 9 lifting limit sliding member,

[0050] 10 lifting limit seat, 10-1 slide, 10-2 slide roller,

[0051] 11 eccentric transmission structure, 11-1 inner wheel, 11-2 eccentric hole, 11-3 outer wheel, 11-4 limit part,

[0052] 11-5 connecting ear, 11-6 bearing, 11-7 flange plate, 11-8 bearing roller,

[0053] 11-9 Connector, 11-91 Fastening column, 11-92 Two screws, 11-10 Cover plate, 11-11 Bearing end ball, 11-12 Inner wheel limit ball;

[0054] 12 lower mold,

[0055] 13 load-bearing translation sliding assembly, 13-1 support groove rail, 13-2 rolling shaft, 13-3 sliding plate, 13-4 convex strip,

[0056] 14 reduction box, 14-1 gear set, 15 lifting mold platform, 16 rotating shaft, 17 rotating shaft end ball, 18 bearing, 19 gear cover, 20 motor, 20-1 motor rotating shaft, 21 bearing seat.

[0057] Power-assisted lifting and buffering device: 22-1 lifting support frame, 22-2 transmission rod bearing seat, 22-3 transmission rod, 22-4 transmission bevel gear, 22-5 driving source, 22-6 lifting rack, 22-7 lifting gear, 22-8 lifting drive shaft, 22-9 driving bevel gear, 22-10 buffer, 22-11 transmission assembly, 22-12 drive rack, 22-13 transmission gear, 22-14 lifting bevel gear.

[0058] 23 push-pull lifting axis. DETAILED DESCRIPTION

[0059] The present invention will be further described with reference to the following examples. Example 1

[0060] refer to Figures 1 to 4 The rotating push-pull folding vertical lifting device of this embodiment includes a driving device 1, an upper connecting seat 2, an upper folding arm 3, a rotating arm 4, a lower folding arm 5, a lower connecting seat 6, a positioning lifting shaft 8, a lifting limit sliding member 9, a lifting limit seat 10, a push-pull lifting shaft 23 and an eccentric transmission structure 11, wherein the upper connecting seat 2, the upper folding arm 3, the rotating arm 4, the lower folding arm 5 and the lower connecting seat 6 can be connected in sequence to rotate relative to each other, and the driving device 1 drives one end of the rotating arm 4 to rotate.

[0061] Specifically, the lower connecting seat 6 is fixed to the stationary base 7, and the lower connecting seat 6 and the lower end of the lower folding arm 5 are connected to each other for relative rotation via a hinge shaft. The upper end of the lower folding arm 5 and the rotating arm 4 are connected to each other for relative rotation via a hinge shaft. The upper end of the rotating arm 4 and the lower end of the upper folding arm 3 are hinged via a hinge shaft, and the upper end of the upper folding arm 3 and the lower end of the upper connecting seat 2 are connected to each other for relative rotation via a hinge shaft. The upper connecting seat 2 is fixed to the bottom of the object to be lifted (the object to be lifted is a lifting mold platform in this embodiment). The upper connecting seat 2, upper folding arm 3, rotating arm 4, lower folding arm 5 and lower connecting seat 6 that are connected to each other for relative rotation from top to bottom constitute a group of folding lifting units. The number of folding lifting units can be set according to actual needs. In this embodiment, the number of folding lifting units is two groups. Among them, both ends of the positioning lifting shaft 8 pass through the rotating arms 4 on both sides and each end is rotatably connected to the lifting limit sliding member 9 on the same side. Reference Figure 5 The lifting limit sliding member 9 is slidably arranged in the slide groove 10-1 of the lifting limit seat 10. Two rows of roller assemblies are respectively arranged on both sides of the slide groove 10-1 of the lifting limit seat 10, and each row of roller assemblies is composed of multiple rollers 10-2 arranged in sequence from top to bottom.

[0062] refer to Figures 6 to 10 The eccentric transmission structure 11 of this embodiment includes an inner wheel 11-1, a bearing 11-6, and an outer wheel 11-3. The outer wheel 11-3 is provided with a connecting ear 11-5. The inner wheel 11-1 is provided with an eccentric hole 11-2. The drive shaft 1-1 of the drive device 1 is assembled in the eccentric hole 11-2 and drives the inner wheel 11-1 to rotate around the eccentric hole 11-2. The bearing 11-6 is disposed between the outer wheel 11-3 and the inner wheel 11-1. The connecting ear 11-5 of the outer wheel 11-3 is connected to the lower folding arm 5 and drives the rotating arm 4 to rotate. Because the inner wheel 11-1 is provided with an eccentric hole 11-2, when the drive shaft 1-1 is assembled in the eccentric hole 11-2 and drives the inner wheel 11-1, the inner wheel 11-1 rotates around the center of the eccentric hole 11-2 rather than the center of the inner wheel 11-1. This allows the presence of a bearing 11-6 between the inner wheel 11-1 and the outer wheel 11-3, and also allows the outer wheel 11-3 to rotate around the drive shaft 1-1 due to the thrust of the inner wheel 11-1. Moreover, because the unique bearing 11-6 of this embodiment is installed between the inner wheel 11-1 and the outer wheel 11-3, the direct friction between the two is very small, making the operation smoother and preventing jamming, and reducing wear between the equipment and extending the service life. The push-pull lifting shaft 23 passes through the rotating arm 4 and the lower folding arm 5 and is connected to the connecting ear 11-5 of the outer wheel 11-3, thereby driving the rotating arm 4 to rotate.

[0063] Bearing 11-6 in this embodiment comprises two flange plates 11-7, multiple cylindrical rollers 11-8, and a connector 11-9. The two flange plates 11-7 are fixedly connected by connector 11-9. The roller 10-2 is rotatably mounted at both ends of the flange plates 11-7 on the same side. Roller end balls 11-11 are provided at both ends of roller 11-8, protruding from the end surfaces of roller 10-2. Compared to the prior art, this embodiment innovatively incorporates roller end balls 11-11 at both ends of cylindrical roller 11-8, thereby reducing friction on the inner wheel 11-1 both circumferentially and on both sides.

[0064] The connecting member 11-9 of this embodiment includes a fastening column 11-91 and two screws 11-92. The two ends of the fastening column 11-91 are respectively connected to the two flange plates 11-7. The two screws 11-92 pass through the flange plates 11-7 on the same side and are threadedly connected to the fastening column 11-91, thereby achieving a fastened connection between the two flange plates 11-7. In order to restrict the inner wheel 11-1 within the outer wheel 11-3, the eccentric transmission structure 11 of this embodiment is further provided with a cover plate 11-10. A limiting portion 11-4 is provided on one side of the outer wheel 11-3. The bearing 11-6 is mounted inside the outer wheel 11-3 and located inside the limiting portion 11-4. The inner wheel 11-1 is mounted on the inner ring of the bearing 11-6. The cover plate 11-10 is located outside the inner wheel 11-1 and the bearing 11-6 and is fixedly connected to the outer wheel 11-3. At the same time, inner wheel limiting balls 11-12 are provided on both sides of the inner wheel 11-1 in this embodiment, which greatly reduces the friction between the two sides of the inner wheel 11-1 and the flange plate 11-7, and is more conducive to the rotation of the eccentric transmission structure 11. Example 2

[0065] refer to Figure 11 and 12The rotary push-pull folding vertical lifting device of this embodiment is provided with a bearing body installed on the upper connecting seat 2, and the bearing body is a lifting mold platform 15. The lifting mold platform 15 is used to carry the lower mold 12 of the thermoforming machine and allows the lower mold 12 of the thermoforming machine to move and change position above it. Since the lower mold 12 is very heavy, only using guide rails cannot allow the lower mold 12 to interact very smoothly and the guide rails are easily damaged. To this end, the two outer sides of the guide rails of the lifting mold platform 15 of this embodiment are respectively provided with load-bearing translation sliding components 113. The load-bearing translation sliding component 113 includes a support groove rail 13-1, a plurality of rolling shafts 13-2 and a sliding plate 13-3. The plurality of rolling shafts 13-2 are rotatably installed inside the support groove rail 13-1 and are arranged in sequence. The bottom of the sliding plate 13-3 is provided with a convex strip 13-4, and the convex strip 13-4 of the sliding plate extends into the support groove rail 13-1. When the sliding plate 13-3 covers the supporting groove 13-1, the ridges 13-4 of the sliding plate 13-3 slide on the multiple rolling shafts 13-2. To better restrict the sliding of the sliding plate 13-3 within the groove 18-1, the ridges 13-4 are embedded in the groove 18-1. The load-bearing sliding assembly of this embodiment has a strong load-bearing capacity, which can meet the requirements of smooth sliding of the lower mold 12 on the lifting mold platform 15 and long equipment life. Because the lifting mold platform 15 is equipped with a load-bearing translation sliding assembly 113, it is suitable for supporting thermoforming machines, thereby enabling the practical application of the three-action cup-making technology per mold cycle. Example 3

[0066] refer to Figures 9 to 11 In this embodiment, there are two eccentric transmission structures 11. The drive shaft 1-1 passes through the eccentric holes 11-2 of the two eccentric transmission structures 11 and is rotatably mounted on the bearing 11-6 seat at both ends. It should be noted that the number of eccentric transmission structures 11 is also one or more, and the specific number can be selected according to actual conditions. The power output shaft of the reduction gearbox 14 is the drive shaft 1-1. The power output shaft passes through the eccentric holes of the eccentric transmission structure 11 and is rotatably mounted on the bearing seat 21 at both ends; a gear set 14-1 is provided inside the reduction gearbox 14. The gear set 14-1 consists of a plurality of meshing transmissions. One end of the gear set 14-1 is connected to the power output shaft, and the other end extends outward to the outside of the bearing seat 21 and is connected to the rotating shaft 20-1 of the motor 20.

[0067] The main technical solution of this embodiment is basically the same as that of Example 1 or Example 2. The features not explained in this embodiment are explained in Example 1 or Example 2 and will not be repeated here. Example 4

[0068] refer to Figure 13In this embodiment, one of the lower part of the upper connecting seat 2 and the upper part of the upper folding arm 3 is provided with a bearing 18 and a stop cover 19 is installed on the outside of the bearing 18. The other component is fixedly connected to the rotating shaft 16, and rotatable rotating shaft end balls 17 are installed at both ends of the rotating shaft 16. The rotating shaft end balls 17 protrude from the ends of the rotating shaft 16; the two ends of the rotating shaft 16 are respectively installed in the above-mentioned two bearings 18 and are located on the inner side of the stop cover 19 on the corresponding side with the rotating shaft end balls 17.

[0069] One of the lower part of the upper folding arm 3 and the upper part of the rotating arm 4 is provided with a bearing 18 and a stop cover 19 is installed on the outside of the bearing 18. The other part is fixedly connected to the rotating shaft 16, and rotatable rotating shaft end balls 17 are installed at both ends of the rotating shaft 16. The rotating shaft end balls 17 protrude from the ends of the rotating shaft 16; the two ends of the rotating shaft 16 are respectively installed in the above-mentioned two bearings 18 and the rotating shaft end balls 17 are located on the inner side of the stop cover 19 on the corresponding side.

[0070] One of the lower part of the rotating arm 4 and the upper part of the lower folding arm 5 is provided with a bearing 18 and a stop cover 19 is installed on the outside of the bearing 18. The other part is fixed with a rotating shaft 16, and rotatable rotating shaft end balls 17 are installed at both ends of the rotating shaft 16. The rotating shaft end balls 17 protrude from the ends of the rotating shaft 16; the two ends of the rotating shaft 16 are respectively installed in the above-mentioned two bearings 18 and the rotating shaft end balls 17 are located on the inner side of the stop cover 19 on the corresponding side.

[0071] One of the lower part of the lower folding arm 5 and the upper part of the lower connecting seat 6 is provided with a bearing 18 and a stop cover 19 is installed on the outer side of the bearing 18. The other part is fixedly connected to the rotating shaft 16, and rotatable rotating shaft end balls 17 are installed at both ends of the rotating shaft 16. The rotating shaft end balls 17 protrude from the ends of the rotating shaft 16; the two ends of the rotating shaft 16 are respectively installed in the above-mentioned two bearings 18 and the rotating shaft end balls 17 are located on the inner side of the stop cover 19 on the corresponding side.

[0072] Similarly, a shaft end ball bearing 17 is installed on the end of the positioning lifting shaft 8 that passes through the lifting limit sliding member 9 , and the shaft end ball bearing 17 protrudes from the end of the positioning lifting shaft 8 .

[0073] Since the rotating shaft 16 is mounted horizontally on the bearing 18, it is prone to horizontal left-right displacement during movement, resulting in resistance generated by the side contact between the upper and lower components, thus affecting the rotational movement of each arm. To solve the problem of horizontal left-right displacement of the rotating shaft 16, this embodiment is equipped with a stop cover 19 on the outer side of the bearing 18 to limit the horizontal left-right movement of the rotating shaft 16. However, the contact between the end face of the rotating shaft 16 and the inner side of the stop cover 19 will generate a certain amount of friction, thereby affecting the smooth rotation, pushing, pulling and lifting of the entire lifting device. In this embodiment, all the ends of the rotating shaft 16 are equipped with rotating shaft end balls 17. The friction generated by the contact between the rotating shaft end balls 17 and the stop cover 19 is extremely small. This can prevent the left-right displacement of the rotating shaft 16 and avoid excessive friction, ensuring smooth lifting and lowering of large-tonnage objects.

[0074] The bearing 18 in this embodiment is a component that supports the rotation of the shaft. It should be noted that the bearing 18 can also be a copper sleeve or other components that can support the rotation of the shaft. Example 5

[0075] refer to Figure 14 and Figure 15 The rotary push-pull folding lifting device of this embodiment is also provided with a power-assisted lifting buffer device, which includes a lifting support frame 22-1, a transmitted component, a lifting component and a lifting drive component. The lifting drive component drives the lifting component to rise and fall through the transmitted component, and a buffer 22-10 is provided on the top of the lifting component.

[0076] The lift drive assembly includes a drive source 22-5, a transmission assembly 22-11, and a lift drive shaft 22-8. In this embodiment, the drive source 22-5 is a motor, and the transmission assembly 22-11 is a gear set. The drive source 22-5 drives the lift drive shaft 22-8 through the transmission assembly 22-11. Specifically, the motor's output shaft is equipped with a gear, and the lift drive shaft 22-8 is also fixedly connected to a gear. The gears on the motor's output shaft mesh with the gears on the lift drive shaft 22-8. To achieve transmission with the driven components, drive bevel gears 22-9 are installed on both sides of the lift drive shaft 22-8.

[0077] The driven assembly includes a transmission rod bearing seat 22-2 and a transmission rod 22-3. The transmission rod 22-3 is secured to the lifting support frame 22-1 via the transmission rod bearing seat 22-2. Transmission bevel gears 22-4 are provided at the upper and lower ends of the transmission rod 22-3. The transmission bevel gear at one end of the transmission rod 22-3 meshes with the drive bevel gear 22-9 of the lifting drive shaft 28, while the other end is in transmission connection with the lifting assembly. In this embodiment, the transmission bevel gear meshes with the lifting bevel gear of the lifting assembly. The lifting assembly includes a lifting bevel gear 22-14, a lifting rack 22-6, and a lifting gear 22-7. The lifting gear 22-7 and the lifting bevel gear 22-14 are mounted on the same shaft. The lifting gear 22-7 meshes with the lifting rack 22-6. A buffer 22-10 is mounted on the upper end of the lifting rack 22-6.

[0078] It should be noted that the driving source 22-5 can be an electric push rod, a motor or other equipment that can realize the lifting and lowering of the driving shaft 22-8. Figure 16 When the driving source 22-5 is a cylinder, the transmission assembly consists of a driving rack 22-12 and a transmission gear 22-13. The driving rack 22-12 is installed on the telescopic rod of the cylinder, and the transmission gear 22-13 is installed on the lifting drive shaft 22-8. The transmission gear 22-13 is meshed and connected with the driving rack 22-12.

[0079] Compared with the prior art, the power-assisted lifting buffer device of the present invention can adjust the height of the buffer 22 - 10 as needed, can meet the height requirements of different equipment or molds, and play a good buffering role.

[0080] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the claims. A person skilled in the art will understand that, with reference to the preferred embodiments, modifications or equivalent substitutions to the technical solutions of the present invention may be made, provided that the modifications remain substantially the same and within the scope of protection of the present invention.

Claims

1. A rotary push-pull folding vertical lifting device, comprising a drive device, an upper connecting seat, an upper folding arm, a rotating arm, a lower folding arm, a lower connecting seat, a positioning lifting shaft, a lifting limit slide, and a lifting limit seat. The upper connecting seat, the upper folding arm, the rotating arm, the lower folding arm, and the lower connecting seat are sequentially connected for relative movement. The drive device drives one end of the rotating arm to rotate, and is characterized by: An eccentric transmission structure and a push-pull lifting shaft are also provided. The eccentric transmission structure includes an inner wheel, a bearing and an outer wheel, the inner wheel is provided with an eccentric hole, the driving shaft of the driving device is assembled in the eccentric hole and drives the inner wheel to rotate around the eccentric hole, the bearing is provided between the outer wheel and the inner wheel, and the outer wheel is provided with a connecting ear; the push-pull lifting shaft passes through the rotating arm and the lower folding arm and is connected to the connecting ear of the outer wheel to drive the rotating arm to rotate; the bearing includes two flange plates, a plurality of cylindrical bearing rollers and a connecting piece, the two flange plates are fixedly connected by the connecting piece, the two ends of the bearing roller are respectively rotatably mounted on the flange plate on the same side and the two end ends of the bearing roller are provided with roller end balls, and the roller end balls protrude from the end surface of the bearing roller end; the two ends of the positioning lifting shaft pass through the rotating arm and are rotatably connected to the lifting limit sliding piece, and the lifting limit sliding piece is vertically slidably arranged in the slide groove of the lifting limit seat.

2. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: Two rows of roller assemblies are respectively arranged on both sides of the slide groove of the lifting limit seat, and each row of roller assemblies is composed of a plurality of slide groove rollers arranged in sequence from top to bottom.

3. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: A bearing body is also provided which is mounted on the upper connecting seat, and load-bearing translational sliding components are respectively provided on the two outer side surfaces of the bearing body, and the load-bearing translational sliding components include a supporting groove rail, a plurality of rolling shafts and a sliding plate, and the plurality of rolling shafts are rotatably mounted inside the supporting groove rail and arranged in sequence, and the sliding plate is fixed to the bearing body and a convex strip is provided on the bottom of the sliding plate, and when the sliding plate covers the supporting groove rail, the convex strip of the sliding plate slides on the plurality of rolling shafts.

4. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: The driving device includes a motor and a reduction gearbox, the power output shaft of the reduction gearbox is the driving shaft, the power output shaft passes through the eccentric hole of the eccentric transmission structure and is rotatably mounted on the bearing seat at both ends; a gear set is provided inside the reduction gearbox, and the gear set consists of a plurality of meshing transmissions, one end of the gear set is connected to the power output shaft, and the other end extends outward to the outside of the bearing seat and is connected to the rotating shaft of the motor.

5. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: Inner wheel limiting balls are arranged on both side surfaces of the inner wheel.

6. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: The connecting piece includes a fastening column and two screws. The two sections of the fastening column are respectively connected to the two flange plates. The two screws respectively pass through the flange plates on the same side and are threadedly connected to the fastening column.

7. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: A cover plate is also provided, and a limiting portion is provided on one side of the outer wheel. The bearing is installed inside the outer wheel and located inside the limiting portion. The inner wheel is installed on the inner ring of the bearing. The cover plate is located outside the inner wheel and the bearing and is fixed to the outer wheel.

8. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: The upper connecting seat, the upper folding arm, the rotating arm, the lower folding arm and the lower connecting seat which are rotatably connected relative to each other from top to bottom constitute a group of folding and lifting units, one of the lower part of the upper connecting seat and the upper part of the upper folding arm is provided with a supporting shaft rotating component and a stop cover is installed on the outer side of the supporting shaft rotating component, and the other component is fixed with a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the two supporting shaft rotating components and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side; One of the lower part of the upper folding arm and the upper part of the rotating arm is provided with a supporting shaft rotating component and a stop cover is installed on the outer side of the supporting shaft rotating component, and the other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two supporting shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side; One of the lower part of the rotating arm and the upper part of the lower folding arm is provided with a support shaft rotating component and a stop cover is installed on the outer side of the support shaft rotating component, and the other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two support shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side; One of the lower part of the lower folding arm and the upper part of the lower connecting seat is provided with a support shaft rotating component, and a stop cover is installed on the outer side of the support shaft rotating component. The other component is fixedly connected to a rotating shaft, and rotatable rotating shaft end balls are installed at both ends of the rotating shaft, and the rotating shaft end balls protrude from the ends of the rotating shaft; the two ends of the rotating shaft are respectively installed in the above-mentioned two support shaft rotating components, and the rotating shaft end balls are located on the inner side of the stop cover on the corresponding side; The end of the positioning lifting shaft passing through the lifting limit sliding member is installed with a shaft end ball, and the shaft end ball protrudes from the end of the positioning lifting shaft; The supporting shaft rotating component is a bearing or a copper sleeve.

9. The rotary, push-pull, foldable, vertical lifting device according to claim 1, characterized in that: A power-assisted lifting and buffering device is also provided, which includes a lifting support frame, a driven component, a lifting component and a lifting drive component; The lifting drive assembly includes a driving source, a transmission assembly and a lifting drive shaft. The driving source drives the lifting drive shaft to rotate through the transmission assembly. Both sides of the lifting drive shaft are provided with driving bevel gears. The driven assembly includes a transmission rod bearing seat and a transmission rod. The transmission rod is rotatably mounted on the lifting support frame through the transmission rod bearing seat. Transmission bevel gears are respectively provided at both ends of the transmission rod. The transmission bevel gear at one end of the transmission rod is meshed with the driving bevel gear of the lifting drive shaft, and the other end is transmission-connected to the lifting assembly. The lifting assembly includes a lifting umbrella gear, a lifting rack and a lifting gear. The lifting gear and the lifting umbrella gear are installed on the same shaft. The lifting umbrella gear is engaged with the transmission umbrella gear at one end of the transmission rod for transmission. The lifting gear is engaged with the lifting rack for transmission connection. A buffer is installed on the upper end of the lifting rack.

10. The rotary, push-pull, foldable, vertical lifting device according to claim 9, characterized in that: The driving source is a cylinder, and the transmission assembly consists of a driving rack and a transmission gear. The driving rack is installed on the telescopic rod of the cylinder, and the transmission gear is installed on the lifting drive shaft. The transmission gear is meshed with the driving rack.

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