Lifting mechanism and OLED flat panel display cleaning equipment

Abstract

The present invention belongs to the technical field of substrate manufacturing process, and discloses a lifting mechanism and OLED flat panel display cleaning equipment. The mechanism includes a shell, a first, a second, a third and a fourth lifting device. A lifting space is provided in the shell, the first lifting device includes a first lifting platform sliding in the lifting space and a first conveying assembly for conveying a substrate, the second lifting device includes a second lifting platform sliding in the lifting space and a second conveying assembly for conveying a substrate, the third lifting device includes a third lifting platform sliding in the lifting space and a third conveying assembly for conveying a substrate, and the fourth lifting device includes a fourth lifting platform sliding in the lifting space and a fourth conveying assembly for conveying a substrate. The idle stroke is reduced by the mutual cooperation of each lifting platform. When the second lifting platform is not returned to its position, the normal inflow of the substrate is ensured by the cooperation of the first, the third and the fourth lifting platforms, thereby improving the equipment coordination rhythm requirements and improving the transmission efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of substrate manufacturing processes, and in particular to a lifting mechanism and an OLED flat panel display cleaning device. Background Art

[0002] Glass substrates for electronic devices have become a representative product today. They have the characteristics of high hardness, thinness, lightness and small area. Such glass substrates are often used in the screens and back covers of mobile phones and tablet computers. Due to the particularity of the application field, the production of such glass substrates often requires fast and batch production.

[0003] In the prior art, during the processing of glass substrates, double-layer equipment usually needs to be equipped with an elevator to complete the upper and lower layer transmission of glass substrates. In order to cooperate with the conveying rhythm, the elevator generally needs to be equipped with a buffer zone to complete the accelerated transmission to meet the rhythm, so that no glass substrates can flow into the zone before the elevator returns to its position, resulting in more empty travels and lower transmission efficiency. Summary of the invention

[0004] The object of the present invention is to provide a lifting mechanism which can reduce the number of idle strokes, improve the coordination rhythm and enhance the transmission efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In one aspect, a lifting mechanism is provided, comprising:

[0007] A shell, wherein a lifting space is provided in the shell, and a main feed port and a main discharge port are provided on the shell, wherein the main feed port is used for an upper device to transport a substrate into the lifting space, and the main discharge port is used for the lifting space to transport a substrate to a lower device;

[0008] A first lifting device, the first lifting device comprising a first lifting platform and a first conveying assembly, the first lifting platform being slidably disposed in the lifting space along a first direction, the first conveying assembly being fixedly disposed on the first lifting platform, and the first conveying assembly being used to convey the substrate on the first lifting platform;

[0009] A second lifting device, the second lifting device comprising a second lifting platform and a second conveying assembly, the second lifting platform being slidably disposed below the first lifting platform along the first direction, the second conveying assembly being fixedly disposed on the second lifting platform, and the second conveying assembly being used to convey the substrate on the second lifting platform;

[0010] a third lifting device, the third lifting device comprising a third lifting platform and a third conveying assembly, the third lifting platform being slidably disposed below the second lifting platform along the first direction, the third conveying assembly being fixedly disposed on the third lifting platform, and the third conveying assembly being used to convey the substrate on the third lifting platform;

[0011] A fourth lifting device, comprising a fourth lifting platform and a fourth conveying assembly, wherein the fourth lifting platform is slidably arranged in the lifting space along the first direction and is arranged in parallel with the second lifting platform, and the fourth conveying assembly is fixedly arranged on the fourth lifting platform, and the fourth conveying assembly is used to convey the substrate on the fourth lifting platform.

[0012] Optionally, the first conveying assembly includes a first driving member and a plurality of first rotating shafts arranged at intervals, the first rotating shafts are rotatably arranged on the first lifting platform, and the first driving member is used to drive the first rotating shafts to rotate; and / or;

[0013] The second conveying assembly comprises a second driving member and a plurality of second rotating shafts arranged at intervals, the second rotating shafts are rotatably arranged on the second lifting platform, and the second driving member is used to drive the second rotating shafts to rotate; and / or;

[0014] The third conveying assembly comprises a third driving member and a plurality of third rotating shafts arranged at intervals, wherein the third rotating shafts are rotatably arranged on the third lifting platform, and the third driving member is used for driving the third rotating shafts to rotate; and / or;

[0015] The fourth conveying assembly includes a fourth driving member and a plurality of fourth rotating shafts arranged at intervals. The fourth rotating shafts are rotatably arranged on the fourth lifting platform. The fourth driving member is used to drive the fourth rotating shafts to rotate.

[0016] Optionally, the first conveying assembly further includes a plurality of first auxiliary wheels, each of the first rotating shafts is sleeved with a plurality of the first auxiliary wheels, and top surfaces of the plurality of the first auxiliary wheels are located on the same horizontal plane; and / or,

[0017] The second conveying assembly further includes a plurality of second auxiliary wheels, each of the second rotating shafts is sleeved with a plurality of the second auxiliary wheels, and the top surfaces of the plurality of the second auxiliary wheels are located on the same horizontal plane; and / or,

[0018] The third conveying assembly further includes a plurality of third auxiliary wheels, each of the third rotating shafts is sleeved with a plurality of the third auxiliary wheels, and the top surfaces of the plurality of third auxiliary wheels are located on the same horizontal plane; and / or,

[0019] The fourth conveying assembly further includes a plurality of fourth auxiliary wheels. Each of the fourth rotating shafts is sleeved with a plurality of the fourth auxiliary wheels. The top surfaces of the plurality of fourth auxiliary wheels are located on the same horizontal plane.

[0020] Optionally, the lifting mechanism also includes a first platform screw, a second platform screw and a lifting platform driving component. The first lifting platform, the second lifting platform and the third lifting platform are all sleeved on the first platform screw and threadedly connected to the first platform screw. The fourth lifting platform is sleeved on the second platform screw and threadedly connected to the second platform screw. The lifting platform driving component is used to drive the first platform screw and the second platform screw to rotate.

[0021] Optionally, the lifting mechanism further comprises a first cassette, the first cassette is slidably disposed on the second lifting platform along the first direction, and the first cassette is used to store the substrate transported to the second lifting platform; and / or;

[0022] The lifting mechanism further includes a second cassette, which is slidably disposed on the fourth lifting platform along the first direction, and the second cassette is used to store the substrate transported to the fourth lifting platform.

[0023] Optionally, the second lifting device further includes a first lifting assembly, the first lifting assembly includes a first power member and a first cassette lead screw, the first cassette is threadedly connected to the first cassette lead screw, the first power member is fixed on the second lifting platform, and the first power member is used to drive the first cassette lead screw to rotate; and / or,

[0024] The fourth lifting device also includes a second lifting assembly, the second lifting assembly includes a second power member and a second cassette screw, the second cassette is threadedly connected to the second cassette screw, the second power member is fixed on the fourth lifting platform, and the second power member is used to drive the second cassette screw to rotate.

[0025] Optionally, the first lifting assembly further comprises a first stopper, one end of which is fixedly mounted on the first cassette, and the other end of which is in contact with an inner wall of the lifting space; and / or,

[0026] The second lifting assembly further includes a second limiting member, one end of which is fixedly mounted on the second cassette, and the other end of which is in contact with the inner wall of the lifting space.

[0027] Optionally, a partition is provided in the shell, and a secondary feed port corresponding to the main feed port and a secondary discharge port corresponding to the main discharge port are provided on the partition, and the partition divides the lifting space into a first lifting bin and a second lifting bin, the first lifting device, the second lifting device and the third lifting device are located in the first lifting bin, and the fourth lifting device is located in the second lifting bin.

[0028] Optionally, a first slide rail is provided in the first lifting warehouse, and the first lifting platform, the second lifting platform and the third lifting platform are all slidably provided on the first slide rail along the first direction; and / or,

[0029] The second lifting warehouse is provided with a second slide rail, and the fourth lifting platform is slidably disposed on the second slide rail along the first direction.

[0030] On the other hand, an OLED flat panel display cleaning device is provided, comprising the lifting mechanism as described in any one of the above items.

[0031] Beneficial effects of the present invention:

[0032] The present invention provides a lifting mechanism. The mechanism mainly includes a first lifting device, a second lifting device, a third lifting device and a fourth lifting device that can slide in a shell. Each lifting device has its own corresponding lifting platform and conveying assembly, which is fixed on the lifting platform and is used to convey the substrate. The upper equipment first delivers the substrate to the second lifting platform through the main feed port, and the second lifting platform carries the substrate and descends to the main discharge port, and conveys the substrate conveyed by the upper equipment to the lower equipment through the main discharge port. When the second lifting platform descends, the first lifting platform and the third lifting platform also descend. The first lifting platform descends to the main feed port, and ensures that the first lifting platform and the fourth lifting platform are flush. The upper equipment continues to convey the substrate to the fourth lifting platform through the main feed port via the first lifting platform, and then the fourth lifting platform descends. When the fourth lifting platform descends, the first lifting platform, the second lifting platform and The third lifting platform rises, the first lifting platform leaves the main feed port, the second lifting platform returns to the main feed port and continues to receive the substrates transported by the upper equipment, the third lifting platform is aligned with the main discharge port, and when the fourth lifting platform is flush with the third lifting platform, the substrate on the fourth lifting platform is transported to the lower equipment through the main discharge port via the third lifting platform, and the cycle is repeated in sequence, thereby reducing the number of empty strokes and ensuring the normal inflow of substrates through the cooperation of the first, third and fourth lifting platforms when the second lifting platform is not returned to the position, thereby improving the equipment coordination rhythm requirements and thus improving the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of the initial state of the lifting mechanism of the present invention;

[0034] Figure 2 is a schematic diagram of the first cartridge of the present invention when it is fully loaded with substrates;

[0035] Figure 3 is a schematic diagram of the first cassette of the present invention when unloading substrates and loading substrates into the second cassette;

[0036] Figure 4 It is a schematic diagram of the first cassette of the present invention when loading substrates and the second cassette unloading substrates.

[0037] In the figure:

[0038] 100. Substrate;

[0039] 1. Shell; 11. Main feed port; 12. Main discharge port; 13. Partition plate; 131. Secondary feed port; 132. Secondary discharge port;

[0040] 2. First lifting device; 21. First lifting platform; 22. First rotating shaft;

[0041] 3. Second lifting device; 31. Second lifting platform; 32. Second rotating shaft; 33. First cassette; 34. First lifting assembly; 341. First power member; 342. First cassette lead screw;

[0042] 4. third lifting device; 41. third lifting platform; 42. third rotating shaft;

[0043] 5. Fourth lifting device; 51. Fourth lifting platform; 52. Fourth rotating shaft; 53. Second cassette; 54. Second lifting assembly; 541. Second power member; 542. Second cassette lead screw;

[0044] 6. First platform lead screw;

[0045] 7. Second platform lead screw;

[0046] 8. Lifting platform drive parts. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] In order to reduce the number of idle strokes, improve the coordination rhythm, and enhance the transmission efficiency, this embodiment provides a lifting mechanism.

[0052] like Figure 1-4As shown, the lifting mechanism includes a shell 1, a first lifting device 2, a second lifting device 3, a third lifting device 4 and a fourth lifting device 5. A lifting space is provided in the shell 1, and a main feed port 11 and a main discharge port 12 are provided on the shell 1. The main feed port 11 is used for the upper equipment to transport the substrate 100 into the lifting space, and the main discharge port 12 is used for the lifting space to transport the substrate 100 to the lower equipment. The first lifting device 2 includes a first lifting platform 21 and a first conveying assembly. The first lifting platform 21 is slidably arranged in the lifting space along a first direction. The first conveying assembly is fixed to the first lifting platform 21. The first conveying assembly is used to convey the substrate 100 on the first lifting platform 21. The second lifting device 3 includes a second lifting platform 31 and a second conveying assembly. The second lifting platform 31 is slidably arranged below the first lifting platform 21 along the first direction. The second conveying assembly is fixed to the first lifting platform 21. The second lifting platform 31 is provided, and the second conveying assembly is used to convey the substrate 100 on the second lifting platform 31. The third lifting device 4 includes a third lifting platform 41 and a third conveying assembly. The third lifting platform 41 is slidably provided below the second lifting platform 31 along the first direction. The third conveying assembly is fixedly provided on the third lifting platform 41. The third conveying assembly is used to convey the substrate 100 on the third lifting platform 41. The fourth lifting device 5 includes a fourth lifting platform 51 and a fourth conveying assembly. The fourth lifting platform 51 is slidably provided in the lifting space along the first direction and is arranged in parallel with the second lifting platform 31. The fourth conveying assembly is fixedly provided on the fourth lifting platform 51. The fourth conveying assembly is used to convey the substrate 100 on the fourth lifting platform 51. The number of empty strokes is reduced by the mutual cooperation of the first lifting device 2, the second lifting device 3, the third lifting device 4 and the fourth lifting device 5, and the normal inflow of the substrate 100 is ensured by the mutual cooperation of the first lifting device 2, the third lifting device 4 and the fourth lifting device 5 when the second lifting device 3 is not returned to its position, thereby improving the equipment coordination beat requirements and thus improving the transmission efficiency.

[0053] The lifting mechanism can be applied to various devices involving lifting of substrate 100. In this embodiment, it is mainly applied to OLED flat panel display cleaning equipment and used to transport glass substrates. In this embodiment, the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are arranged at intervals, and sufficient lifting space is left to avoid interference during lifting work.

[0054] Alternatively, if Figure 1As shown, the first conveying assembly includes a first driving member and a plurality of first rotating shafts 22 arranged at intervals, the first rotating shaft 22 is rotatably arranged on the first lifting platform 21, and the first driving member is used to drive the first rotating shaft 22 to rotate; the second conveying assembly includes a second driving member and a plurality of second rotating shafts 32 arranged at intervals, the second rotating shaft 32 is rotatably arranged on the second lifting platform 31, and the second driving member is used to drive the second rotating shaft 32 to rotate; the third conveying assembly includes a third driving member and a plurality of third rotating shafts 42 arranged at intervals, the third rotating shaft 42 is rotatably arranged on the third lifting platform 41, and the third driving member is used to drive the third rotating shaft 42 to rotate; the fourth conveying assembly includes a fourth driving member and a plurality of fourth rotating shafts 52 arranged at intervals, the fourth rotating shaft 52 is rotatably arranged on the fourth lifting platform 51, and the fourth driving member is used to drive the fourth rotating shaft 52 to rotate. Since the first lifting platform 21, the second lifting platform 31, the third lifting platform 41 and the fourth lifting platform 51 all use their corresponding first rotating shaft 22, the second rotating shaft 32, the third rotating shaft 42 and the fourth rotating shaft 52 to transport the substrate 100, each transportation link can be connected, thereby facilitating the transfer of the substrate 100 between each lifting platform.

[0055] In this embodiment, the rotating shafts on each lifting platform are arranged at equal intervals, and the intervals between the rotating shafts on each lifting platform are the same. In addition, the distances between the two adjacent rotating shafts on the fourth lifting platform 51 and the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are also the same, thereby ensuring the connectivity between the fourth lifting platform 51 and the first lifting platform 21 and the third lifting platform 41. The intervals between the rotating shafts can be set according to the actual size of the substrate 100. In this embodiment, fifteen rotating shafts with equal intervals are arranged on each lifting platform.

[0056] Furthermore, the first conveying assembly also includes multiple first auxiliary wheels, each first rotating shaft 22 is provided with multiple first auxiliary wheels, and the top surfaces of the multiple first auxiliary wheels are all located on the same horizontal plane. The second conveying assembly also includes multiple second auxiliary wheels, each second rotating shaft 32 is provided with multiple second auxiliary wheels, and the top surfaces of the multiple second auxiliary wheels are all located on the same horizontal plane. The third conveying assembly also includes multiple third auxiliary wheels, each third rotating shaft 42 is provided with multiple third auxiliary wheels, and the top surfaces of the multiple third auxiliary wheels are all located on the same horizontal plane. The fourth conveying assembly also includes multiple fourth auxiliary wheels, each fourth rotating shaft 52 is provided with multiple fourth auxiliary wheels, and the top surfaces of the multiple fourth auxiliary wheels are all located on the same horizontal plane. By respectively arranging the first auxiliary wheel, the second auxiliary wheel, the third auxiliary wheel and the fourth auxiliary wheel corresponding to each other on the first rotating shaft 22, the second rotating shaft 32, the third rotating shaft 42 and the fourth rotating shaft 52, the substrate 100 falls on the first auxiliary wheel, the second auxiliary wheel, the third auxiliary wheel and the fourth auxiliary wheel. Since the auxiliary wheel has a smaller cross-sectional area than the rotating shaft, the contact area with the substrate 100 is reduced, thereby reducing the probability of damaging the substrate 100.

[0057] In this embodiment, since the glass substrate is transported, which is relatively fragile, the first auxiliary wheel, the second auxiliary wheel, the third auxiliary wheel and the fourth auxiliary wheel are all made of relatively soft materials to ensure that the glass substrate will not be damaged. For example, the first auxiliary wheel, the second auxiliary wheel, the third auxiliary wheel and the fourth auxiliary wheel can be made of soft materials such as rubber or nylon. In addition, in this embodiment, the first rotating shaft 22, the second rotating shaft 32, the third rotating shaft 42 and the fourth rotating shaft 52 are respectively provided with a plurality of auxiliary wheels, and the auxiliary wheels on each adjacent two rotating shafts are arranged in a staggered manner to better support the glass substrate. For example, in this embodiment, fifteen first rotating shafts 22 are provided, and each first rotating shaft 22 is provided with a plurality of first auxiliary wheels at intervals, and the first auxiliary wheels on each adjacent two first rotating shafts 22 are arranged in a staggered manner, and the arrangement of the corresponding auxiliary wheels on the other second rotating shafts 32, the third rotating shaft 42 and the fourth rotating shaft 52 is the same as the arrangement of the first auxiliary wheels on the first rotating shaft 22.

[0058] Alternatively, if Figure 1-4 As shown, the lifting mechanism also includes a first platform lead screw 6, a second platform lead screw 7 and a lifting platform driving member 8. The first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are all sleeved on the first platform lead screw 6 and are threadedly connected to the first platform lead screw 6. The fourth lifting platform 51 is sleeved on the second platform lead screw 7 and is threadedly connected to the second platform lead screw 7. The lifting platform driving member 8 is used to drive the first platform lead screw 6 and the second platform lead screw 7 to rotate. The first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are connected together through the first platform lead screw 6, so that when the first platform lead screw 6 rotates, the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 can be driven to rise or fall at the same time, making the operation process more convenient.

[0059] In this embodiment, since the first lifting platform 21, the second lifting platform 31, the third lifting platform 41 and the fourth lifting platform 51 are arranged in parallel, the first platform lead screw 6 and the second platform lead screw 7 are each provided with a lifting platform driving member 8 for driving, so as to achieve separate control. Exemplarily, the lifting platform driving member 8 is a motor.

[0060] Optionally, the second lifting device 3 further includes a first cassette 33, which is slidably disposed on the second lifting platform 31 along the first direction, and the first cassette 33 is used to store the substrate 100 transported to the second lifting platform 31. The fourth lifting device 5 further includes a second cassette 53, which is slidably disposed on the fourth lifting platform 51 along the first direction, and the second cassette 53 is used to store the substrate 100 transported to the fourth lifting platform 51. By providing the first cassette 33 and the second cassette 53, multiple substrates 100 can be transported in one lift, thereby improving the efficiency of transport.

[0061] In this embodiment, the first cassette 33 is a frame composed of a first top plate, a first bottom plate and two first support frames. The first top plate and the first bottom plate of the first cassette 33 are respectively located on the upper and lower sides of the second rotating shaft 32, and the two first support frames pass through the gap between the second rotating shaft 32 to connect the first top plate and the first bottom plate together to form the first cassette 33. The second cassette 53 is a frame composed of a second top plate, a second bottom plate and two second support frames. The second top plate and the second bottom plate of the second cassette 53 are respectively located on the upper and lower sides of the fourth rotating shaft 52, and the two second support frames pass through the gap between the fourth rotating shaft 52 to connect the second top plate and the second bottom plate together to form the second cassette 53. The first support frame and the second support frame are similar to ladder structures and are divided into multiple layers, and each layer can hold a substrate 100. In this embodiment, the first platform screw 6 is arranged on the side of the second lifting platform 31 close to the inner wall of the lifting space to avoid interference between the first platform screw 6 and the first cassette 33, and the second platform screw 7 is arranged on the side of the fourth lifting platform 51 close to the inner wall of the lifting space to avoid interference between the second platform screw 7 and the second cassette 53.

[0062] Further, the second lifting device 3 also includes a first lifting assembly 34, the first lifting assembly 34 includes a first power member 341 and a first cassette lead screw 342, the first cassette 33 is threadedly connected to the first cassette lead screw 342, the first power member 341 is fixedly arranged on the second lifting platform 31, and the first power member 341 is used to drive the first cassette lead screw 342 to rotate; the fourth lifting device 5 also includes a second lifting assembly 54, the second lifting assembly 54 includes a second power member 541 and a second cassette lead screw 542, the second cassette 53 is threadedly connected to the second cassette lead screw 542, the second power member 541 is fixedly arranged on the fourth lifting platform 51, and the second power member 541 is used to drive the second cassette lead screw 542 to rotate. Since the lead screw structure adopts a threaded structure, the positioning accuracy is high and it also has a self-locking function.

[0063] In this embodiment, the first bottom plate of the first cassette 33 and the second bottom plate of the second cassette 53 are respectively fixed with a first screw sleeve and a second screw sleeve, the first screw sleeve is located on the side of the first bottom plate away from the first platform screw 6, and the second screw sleeve is located on the side of the second bottom plate away from the second platform screw 7, so as to avoid the first cassette screw 342 from colliding with the first platform screw 6, and the second cassette screw 542 from colliding with the second platform screw 7. In other words, the first cassette screw 342 and the first platform screw 6 are respectively located on both sides of the first cassette 33, and the second cassette screw 542 and the second platform screw 7 are respectively located on both sides of the second cassette 53. The first cassette screw 342 is threadedly connected to the first screw sleeve, and the second cassette screw 542 is threadedly connected to the second screw sleeve. Exemplarily, the first power member 341 and the second power member 541 are both motors.

[0064] Furthermore, the first lifting assembly 34 further includes a first stopper, one end of which is fixedly mounted on the first cassette 33, and the other end of which is in contact with the inner wall of the lifting space, and the second lifting assembly 54 further includes a second stopper, one end of which is fixedly mounted on the second cassette 53, and the other end of which is in contact with the inner wall of the lifting space. By providing the stopper, the first cassette 33 is prevented from rotating when the first cassette lead screw 342 drives the first cassette 33 to be lifted or lowered, and the second cassette 53 is prevented from rotating when the second cassette lead screw 542 drives the second cassette 53 to be lifted or lowered.

[0065] In this embodiment, a plurality of first and second limiters are provided, which are respectively located at the four corners of the first cassette 33 and the second cassette 53, wherein the first limiter is clamped between the first cassette 33 and the inner wall of the lifting space, and the second limiter is clamped between the second cassette 53 and the inner wall of the lifting space. In order to avoid hard contact, the first and second limiters are both made of a relatively soft material, and illustratively, the first and second limiters are both aluminum blocks.

[0066] Optionally, a partition 13 is provided in the housing 1, and a secondary feed port 131 corresponding to the main feed port 11 and a secondary discharge port 132 corresponding to the main discharge port 12 are provided on the partition 13. The partition 13 divides the lifting space into a first lifting bin and a second lifting bin. The first lifting device 2, the second lifting device 3 and the third lifting device 4 are located in the first lifting bin, and the fourth lifting device 5 is located in the second lifting bin. The partition 13 is provided to prevent the substrate 100 from falling out from the other side due to inertia when it is transported from the upper device to the second lifting platform 31.

[0067] In this embodiment, the shell 1 is divided into two lifting compartments by a partition 13. In other embodiments, two elevators may also be set up, the first lifting device 2, the second lifting device 3 and the third lifting device 4 are set in one elevator, and the fourth lifting device 5 is set in another elevator, and the two elevators are placed side by side and connected to each other.

[0068] Optionally, a first slide rail is provided in the first lifting warehouse, and the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are all slidably provided on the first slide rail along the first direction; a second slide rail is provided in the second lifting warehouse, and the fourth lifting platform 51 is slidably provided on the second slide rail along the first direction. By providing the first slide rail in the first lifting warehouse, the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 slide more smoothly. By providing the second slide rail in the second lifting warehouse, the fourth lifting platform 51 slides more smoothly.

[0069] In this embodiment, since the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 are driven to rise and fall by the first platform lead screw 6, the first slide rail also plays a certain limiting role to prevent the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 from rotating with the first platform lead screw 6. In addition, the fourth lifting platform 51 is driven to rise and fall by the second platform lead screw 7, so the second slide rail also plays a limiting role on the fourth lifting platform 51 to prevent the fourth lifting platform 51 from rotating with the second platform lead screw 7.

[0070] Optionally, a first position sensor is provided in the first cassette 33, and the first position sensor is used to detect whether the substrate 100 is located at the storage position of the first cassette 33; a second position sensor is provided in the second cassette 53, and the second position sensor is used to detect whether the substrate 100 is located at the storage position of the second cassette 53. By providing the first position sensor in the first cassette 33 and the second position sensor in the second cassette 53, it is ensured that the next operation is started only after the substrate 100 completely enters the cassette storage position, thereby avoiding damage to the substrate 100. In this embodiment, the first position sensor and the second position sensor are proximity switches.

[0071] The actual working process is as follows: in the initial state, the first lifting platform 21 is located above the main feed port 11, the second lifting platform 31 is aligned with the main feed port 11, the third lifting platform 41 is aligned with the main discharge port 12, and the fourth lifting platform 51 is aligned with the second lifting platform 31. First, the second driving member is started to drive the second rotating shaft 32 to rotate. The rotation of the second rotating shaft 32 will drive the second auxiliary wheel thereon to rotate, and the substrate 100 delivered from the upper device through the main feed port 11 is delivered to the uppermost layer of the first cassette 33. Then, the first power member 341 drives the first cassette lead screw 342 to rotate, and drives the first cassette 33 to rise. At this time, the second layer of the first cassette 33 is flush with the second rotating shaft 32. The second rotating shaft 32 delivers the substrate 100 delivered from the upper device to the second layer of the first cassette 33, and so on, until the first cassette 33 is lifted. 33 is filled with substrates 100. At this time, the bottom layer of the first cassette 33 is flush with the second shaft 32. Then the lifting platform driving component 8 drives the first platform screw 6 to rotate, driving the second lifting platform 31 to descend, until the second shaft 32 is aligned with the main discharge port 12, and the substrate 100 of the bottom layer of the first cassette 33 is sent to the lower equipment through the main discharge port 12 through the second shaft 32. The first cassette screw 342 rotates in the opposite direction, driving the first cassette 33 to descend, and then the substrate 100 of the upper layer continues to be sent out until all the substrates 100 in the first cassette 33 are transported to the lower equipment. When the second lifting platform 31 descends, the first lifting platform 21 and the third lifting platform 41 descend with the second lifting platform 31. When the second lifting platform 31 is aligned with the main discharge port 12, the first lifting platform 21 is aligned with the main feed port 11, and the third lifting platform 41 is located below the main discharge port 12. At this time, the fourth lifting platform 51 is aligned with the first lifting platform 21, so that the first rotating shaft 22 and the fourth rotating shaft 52 form a flush conveying platform, and the substrate 100 conveyed by the upper device is finally conveyed into the first layer of the second cassette 53 through the main feed port 11, the first rotating shaft 22, the secondary feed port 131 and the fourth rotating shaft 52 in sequence. After that, the second cassette lead screw 542 drives the second cassette 53 to rise until the second cassette 53 is filled, and then the fourth lifting platform 51 descends. When the fourth lifting platform 51 is aligned with the secondary discharge port 132, the first lifting platform 21, the second lifting platform 31 and the third lifting platform 41 rise and return to the initial position driven by the first platform lead screw 6. At this time, the fourth lifting platform 51 is aligned with the third lifting platform 41, and the substrates 100 in the second cassette 53 are finally transported to the lower device through the fourth rotating shaft 52, the secondary discharge port 132, the third rotating shaft 42 and the main discharge port 12. When the second cassette 53 transports the substrates 100 to the lower device, the upper device is transporting the substrates 100 to the first cassette 33 because the second lifting platform 31 has returned to its position.This cycle is repeated, thereby reducing the number of empty strokes and ensuring that when the second lifting platform 31 is not returned to its original position, the first lifting platform 21, the third lifting platform 41 and the fourth lifting platform 51 cooperate with each other to ensure the normal flow of the substrate 100, thereby improving the equipment coordination rhythm requirements and thus improving the transmission efficiency.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lifting mechanism, characterized in that: The lifting mechanism comprises: A shell (1), wherein a lifting space is provided in the shell (1), and a main feed port (11) and a main discharge port (12) are provided on the shell (1), wherein the main feed port (11) is used for an upper layer device to transport a substrate (100) into the lifting space, and the main discharge port (12) is used for the lifting space to transport a substrate (100) to a lower layer device; A first lifting device (2), the first lifting device (2) comprising a first lifting platform (21) and a first conveying assembly, the first lifting platform (21) being slidably disposed in the lifting space along a first direction, the first conveying assembly being fixedly disposed on the first lifting platform (21), and the first conveying assembly being used to convey the substrate (100) on the first lifting platform (21); A second lifting device (3), the second lifting device (3) comprising a second lifting platform (31) and a second conveying assembly, the second lifting platform (31) being slidably disposed below the first lifting platform (21) along the first direction, the second conveying assembly being fixedly disposed on the second lifting platform (31), and the second conveying assembly being used to convey the substrate (100) on the second lifting platform (31); A third lifting device (4), the third lifting device (4) comprising a third lifting platform (41) and a third conveying assembly, the third lifting platform (41) being slidably disposed below the second lifting platform (31) along the first direction, the third conveying assembly being fixedly disposed on the third lifting platform (41), and the third conveying assembly being used to convey the substrate (100) on the third lifting platform (41); A fourth lifting device (5), the fourth lifting device (5) comprising a fourth lifting platform (51) and a fourth conveying assembly, the fourth lifting platform (51) being slidably arranged in the lifting space along the first direction and arranged in parallel with the second lifting platform (31), the fourth conveying assembly being fixedly arranged on the fourth lifting platform (51), and the fourth conveying assembly being used to convey the substrate (100) on the fourth lifting platform (51); The lifting mechanism further comprises a first platform lead screw (6), a second platform lead screw (7) and a lifting platform driving member (8); the first lifting platform (21), the second lifting platform (31) and the third lifting platform (41) are all sleeved on the first platform lead screw (6) and threadedly connected to the first platform lead screw (6); the fourth lifting platform (51) is sleeved on the second platform lead screw (7) and threadedly connected to the second platform lead screw (7); the lifting platform driving member (8) is used for driving the first platform lead screw (6) and the second platform lead screw (7) to rotate; The lifting mechanism further comprises a first cassette (33), the first cassette (33) being slidably disposed on the second lifting platform (31) along the first direction, the first cassette (33) being used to store the substrate (100) transported to the second lifting platform (31); and / or; The lifting mechanism further comprises a second cassette (53), the second cassette (53) being slidably disposed on the fourth lifting platform (51) along the first direction, the second cassette (53) being used to store the substrate (100) transported to the fourth lifting platform (51); The second lifting device (3) further comprises a first lifting assembly (34), the first lifting assembly (34) comprising a first power member (341) and a first cassette lead screw (342), the first cassette (33) being threadedly connected to the first cassette lead screw (342), the first power member (341) being fixed on the second lifting platform (31), the first power member (341) being used to drive the first cassette lead screw (342) to rotate; and / or, The fourth lifting device (5) also includes a second lifting assembly (54), the second lifting assembly (54) includes a second power member (541) and a second cassette screw (542), the second cassette (53) is threadedly connected to the second cassette screw (542), the second power member (541) is fixed on the fourth lifting platform (51), and the second power member (541) is used to drive the second cassette screw (542) to rotate.

2. The lifting mechanism according to claim 1, characterized in that: The first conveying assembly comprises a first driving member and a plurality of first rotating shafts (22) arranged at intervals, the first rotating shafts (22) being rotatably arranged on the first lifting platform (21), and the first driving member being used for driving the first rotating shafts (22) to rotate; and / or; The second conveying assembly comprises a second driving member and a plurality of second rotating shafts (32) arranged at intervals, the second rotating shafts (32) are rotatably arranged on the second lifting platform (31), and the second driving member is used to drive the second rotating shafts (32) to rotate; and / or; The third conveying assembly comprises a third driving member and a plurality of third rotating shafts (42) arranged at intervals, wherein the third rotating shafts (42) are rotatably arranged on the third lifting platform (41), and the third driving member is used to drive the third rotating shafts (42) to rotate; and / or; The fourth conveying assembly comprises a fourth driving member and a plurality of fourth rotating shafts (52) arranged at intervals. The fourth rotating shafts (52) are rotatably arranged on the fourth lifting platform (51). The fourth driving member is used to drive the fourth rotating shafts (52) to rotate.

3. The lifting mechanism according to claim 2, characterized in that: The first conveying assembly further comprises a plurality of first auxiliary wheels, each of the first rotating shafts (22) is sleeved with a plurality of the first auxiliary wheels, and the top surfaces of the plurality of the first auxiliary wheels are located on the same horizontal plane; and / or, The second conveying assembly further comprises a plurality of second auxiliary wheels, each of the second rotating shafts (32) is sleeved with a plurality of the second auxiliary wheels, and the top surfaces of the plurality of the second auxiliary wheels are located on the same horizontal plane; and / or, The third conveying assembly further comprises a plurality of third auxiliary wheels, each of the third rotating shafts (42) is sleeved with a plurality of the third auxiliary wheels, and the top surfaces of the plurality of third auxiliary wheels are located on the same horizontal plane; and / or, The fourth conveying assembly further comprises a plurality of fourth auxiliary wheels, each of the fourth rotating shafts (52) is sleeved with a plurality of the fourth auxiliary wheels, and the top surfaces of the plurality of the fourth auxiliary wheels are located on the same horizontal plane.

4. The lifting mechanism according to claim 1, characterized in that: The first lifting assembly (34) further comprises a first limiting member, one end of which is fixedly mounted on the first cassette (33), and the other end of which is in contact with the inner wall of the lifting space; and / or, The second lifting assembly (54) further comprises a second limiting member, one end of which is fixedly mounted on the second cassette (53), and the other end of which is in contact with the inner wall of the lifting space.

5. The lifting mechanism according to any one of claims 1 to 4, characterized in that: A partition (13) is provided in the shell (1), and a secondary feed port (131) corresponding to the main feed port (11) and a secondary discharge port (132) corresponding to the main discharge port (12) are also provided on the partition (13); the partition (13) divides the lifting space into a first lifting bin and a second lifting bin; the first lifting device (2), the second lifting device (3) and the third lifting device (4) are located in the first lifting bin, and the fourth lifting device (5) is located in the second lifting bin.

6. The lifting mechanism according to claim 5, characterized in that: A first slide rail is provided in the first lifting warehouse, and the first lifting platform (21), the second lifting platform (31) and the third lifting platform (41) are all slidably arranged on the first slide rail along the first direction; and / or, A second slide rail is provided in the second lifting compartment, and the fourth lifting platform (51) is slidably arranged on the second slide rail along the first direction.

7. OLED flat panel display cleaning equipment, characterized in that: The OLED flat panel display cleaning device comprises the lifting mechanism as described in any one of claims 1-6.

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