A dust-resistant full chain-driven double-reach fork

Abstract

The present invention relates to the field of warehousing and logistics technology, specifically to a dust-tolerant full-chain driven double-extension fork, comprising two groups of lower fork assemblies, two groups of lower middle fork assemblies, two groups of upper middle fork assemblies and two groups of upper fork assemblies, wherein the two groups of lower middle fork assemblies are respectively slidably connected to adjacent lower fork assemblies, the two groups of upper middle fork assemblies are respectively slidably connected to adjacent lower middle fork assemblies, and the two groups of upper fork assemblies are respectively slidably connected to adjacent upper middle fork assemblies. This device uses an innovative chain rack structure, in which one side of the chain rack is connected to the moving fork body and the other side is meshed with the transmission chain. When working, the transmission chain drags the chain rack to move, and the chain rack moves with the transmission chain without relative movement. This can reduce the wear of the transmission chain and make the meshing of the transmission chain and the chain rack more reliable. At the same time, the insensitivity of the chain structure to dust is utilized to achieve a dust-tolerant design from the system structure.

Description

Technical Field

[0001] The invention relates to the technical field of warehousing logistics, and in particular to a dust-resistant full-chain driven double-extension cargo fork. Background Art

[0002] In recent years, with the continuous improvement of production and management levels of enterprises, more and more enterprises have realized that the improvement of logistics systems can improve production efficiency and reduce circulation costs. Automated high-bay warehouses are an important part of the logistics system. They are increasingly widely used in China, and the single-bay structure is generally adopted in the layout. However, with the increasing requirements for storage efficiency, double-bay warehouses have gradually emerged, and double-bay telescopic forks have also begun to be adopted;

[0003] Most of today's telescopic forks are single-reach forks, which include upper forks, middle forks, and lower forks. With the rise of double-bay warehouses, due to the limitations of aisles and fork levels, in some narrow aisles and where goods are far away, that is, the forks need to be extended a long distance, single-reach forks can no longer pick up goods. In addition, due to the diversity of shelf environments and some dusty working environments, further requirements for dust and dust resistance are put forward for forks.

[0004] Or, as provided in the publication number "CN118289680A", a high-precision narrow heavy-duty fork is used. All driving mechanisms of the device adopt gear and rack meshing transmission, which makes the overall failure rate low and the service life long. The telescopic positioning accuracy of the fork is high, and the fork arm width of the fork is narrow and the structure is compact, which reduces the cost and meets the requirement of narrow width direction of the picking space;

[0005] However, when used in a dusty environment, the gear rack transmission structure is prone to cause dust accumulation and is not suitable for working in a dusty environment. In addition, the gear rack transmission distance is limited. Although the use of a multi-stage motion mechanism can increase the movement distance of the fork, the overall structure is more complicated and has poor stability.

[0006] Therefore, those skilled in the art provide a dust-resistant full-chain driven double-extension fork to solve the problems raised in the above background technology. Summary of the invention

[0007] The object of the present invention is to provide a dust-resistant full-chain driven double-extension fork to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A dust-resistant full-chain driven double-reaching cargo fork comprises two groups of lower fork assemblies, two groups of lower middle fork assemblies, two groups of upper middle fork assemblies and two groups of upper fork assemblies, wherein the two groups of lower middle fork assemblies are respectively slidably connected to adjacent lower fork assemblies, the two groups of upper middle fork assemblies are respectively slidably connected to adjacent lower middle fork assemblies, the two groups of upper fork assemblies are respectively slidably connected to adjacent upper middle fork assemblies, and a first reach driving assembly and a second reach driving assembly are arranged below the two groups of lower fork assemblies, the first reach driving assembly is connected to the upper middle fork assembly through a chain, and the second reach driving assembly is connected to the lower middle fork assembly through a chain;

[0010] Two universal couplings are arranged between the two groups of lower fork assemblies, and the first extension drive assembly and the second extension drive assembly are respectively connected to adjacent universal couplings.

[0011] Preferably: the lower fork assembly comprises a lower fork body, the first extension drive assembly and the second extension drive assembly are both arranged below the lower fork body, and the inner walls on both sides of the lower fork body are both provided with a plurality of lower middle fork guide blocks and lower middle fork guide wheels for assisting the sliding of the lower middle fork assembly;

[0012] A fixing frame is also provided in the lower fork body, and the fixing frame is provided in the middle part of the lower fork body. A chain cleaning assembly for cleaning the chain is installed on the fixing frame, and an auxiliary chain cleaning assembly for cleaning the chain is provided on the fixing frame.

[0013] Preferably: the one-stretch drive assembly includes a one-stretch reduction motor and two one-stretch driving chains, the two one-stretch driving chains are respectively arranged in two groups of lower fork bodies, the output end of the one-stretch reduction motor is connected to the first sprocket through a coupling, the first sprocket is meshed with a one-stretch transmission chain, the one-stretch transmission chain is meshed with the one-stretch driving chain in the adjacent lower fork body, the end of the one-stretch transmission chain away from the one-stretch reduction motor is connected to one of the universal couplings, the universal coupling is meshed with the one-stretch driving chain in the other lower fork body through sprocket meshing, multiple sets of double-row sprocket assemblies are hinged at both ends of the lower fork body, and the multiple sets of double-row sprocket assemblies are meshed with the one-stretch driving chain.

[0014] Preferably: the double-extension drive assembly includes a double-extension reduction motor and two double-extension active chains, the two double-extension active chains are respectively arranged in two groups of lower fork bodies, the output end of the double-extension reduction motor is connected to the second sprocket through a coupling, the second sprocket is meshed with a double-extension transmission chain, the double-extension transmission chain is meshed with the double-extension active chains in the adjacent lower fork body through the chain, one end of the double-extension transmission chain away from the double-extension reduction motor is connected to the adjacent universal coupling, the side of the universal coupling away from the double-extension transmission chain is meshed with the double-extension active chain in the other group of lower fork bodies, and the two double-extension active chains are respectively slidably sleeved on the multiple double-row sprocket assemblies in the lower fork body.

[0015] Preferably: the lower middle fork assembly comprises a lower middle fork body, the lower middle fork body is slidably connected to the lower fork body, a lower middle fork chain rack is arranged in the lower middle fork body, and the lower middle fork chain rack is meshed with the two-extension active chain in the lower fork body, and a plurality of upper middle fork guide blocks and upper middle fork guide wheels for assisting the sliding of the upper middle fork assembly are also installed on both sides of the top of the lower middle fork body;

[0016] The upper middle fork assembly includes an upper middle fork body, and the upper middle fork body is slidably connected to the lower middle fork body. An upper middle fork moving chain is provided in the lower middle fork body, and the upper middle fork moving chain is meshed with the double-row sprocket assembly. An upper middle fork guide sprocket is also meshed at one end of the upper middle fork moving chain close to the upper fork assembly, and an upper middle fork chain tooth meshed with the upper middle fork moving chain is installed in the upper middle fork body.

[0017] Preferably: the double-row sprocket assembly includes a sprocket shaft, a double-row sprocket body is arranged on the sprocket shaft, the double-row sprocket body is respectively engaged with the upper middle fork movable chain and a first extension driving chain, a passing wheel is also arranged on the sprocket shaft, and the second extension driving chain is slidably connected to the passing wheel.

[0018] Preferably: the upper fork assembly includes an upper fork body, a plurality of upper fork moving guide blocks and upper fork moving guide wheels are installed on the inner walls on both sides of the upper fork body, the upper fork body is slidably connected to the upper middle fork assembly through the upper fork moving guide blocks and the upper fork moving guide wheels, the upper fork body is installed with a first upper fork moving chain and a second upper fork moving chain, one end of the first upper fork moving chain and the second upper fork moving chain close to the upper fork body is installed in the upper fork body, the other ends of the first upper fork moving chain and the second upper fork moving chain are fixedly connected to a chain fixing adjustment seat, and the first upper fork moving chain and the second upper fork moving chain are fixed to the lower middle fork body via the chain fixing adjustment seat.

[0019] Preferably: two drainage grooves are arranged in the fixed frame, the bottoms of the two drainage grooves are connected with drainage pipes, foam spray heads are arranged on both sides of the inner wall of the fixed frame, liquid inlet pipes connected with the two foam spray heads are arranged on both sides of the fixed frame, and a clean water spray head and a wiping cotton are arranged on the end of the inner wall of the fixed frame away from the foam spray head.

[0020] Preferably: the chain cleaning assembly comprises a plurality of side brushes, the plurality of side brushes are rotatably connected to the inner walls on both sides of the fixed frame, and the plurality of side brushes are arranged between the foam spray head and the wiping cotton, the two side brushes located on the same side are both equipped with a first transmission wheel, and the first transmission wheel is installed in the inner wall of the fixed frame, a first transmission belt is arranged between two adjacent first transmission wheels, the two first transmission wheels are connected through the first transmission belt, a third transmission belt is also arranged on the first transmission wheel close to the foam spray head, and the other end of the third transmission belt is connected to the sprocket shaft in the lower fork body;

[0021] The chain cleaning assembly also includes a bottom brush, which is rotatably connected to the bottom of the inner wall of the fixed frame. A second transmission wheel is also provided in the inner wall of the fixed frame, and the second transmission wheel is provided below one of the first transmission wheels. A second transmission belt is provided between the second transmission wheel and the adjacent first transmission wheel. The second transmission wheel is connected to the adjacent first transmission wheel through the second transmission belt. The side of the second transmission wheel close to the bottom brush is fixedly connected to the first bevel gear through a connecting shaft. A second bevel gear is provided at the bottom of the bottom brush, and the second bevel gear is meshed with the first bevel gear.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention adopts an innovative sprocket structure. One side of the sprocket is connected to the mobile fork body and the other side is meshed with the transmission chain. When working, the transmission chain drags the sprocket to move, and the sprocket moves with the transmission chain without relative movement. This can reduce the wear of the transmission chain and make the meshing of the transmission chain and the sprocket more reliable. At the same time, the insensitivity of the chain structure to dust is utilized to achieve dust-tolerant design from the perspective of system structure.

[0024] 2. The present invention sets the chain teeth in a tooth-down installation mode, and the lower middle fork body and the upper middle fork body are hollowed out at the joints with the chain, so that dust can fall off by itself, thereby achieving the purpose of dust tolerance.

[0025] 3. In the present invention, the two sets of chain fixing adjustment seats in the upper middle fork and the upper fork assembly are fixed on the lower middle fork body and are respectively connected to the two upper fork moving chains. When the upper middle fork moves, it pulls the upper fork moving chain to one side. Due to the traction of the chain, the upper fork body also moves in the same direction. The upper fork moving chain is embedded in the upper middle fork body, does not increase the fork body space, has a compact structure, good stability, and is suitable for the storage and retrieval of goods in a small space.

[0026] 4. The chain cleaning assembly provided in the present invention can, when in use, firstly perform a simple cleaning on the chain passing through the lower fork body by rotating the side brush and the bottom brush, sweep the dust on the chain off and drop it into the drain trough, and then spray the detergent on the surface of the chain through the provided foam spray head, and then cooperate with the side brush and the bottom brush to perform a deep cleaning on the chain to ensure the stability of the fork when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the first viewing angle of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of the lower fork assembly, the lower middle fork assembly, the upper middle fork assembly and the upper fork assembly of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the lower fork body in the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the lower middle fork body of the present invention;

[0031] Figure 5 It is a schematic structural diagram of the upper middle fork assembly and the upper fork assembly of the present invention;

[0032] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point A in the middle;

[0033] Figure 7 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0034] Figure 8 It is a schematic diagram of the chain structure in the lower fork body of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of a double-row sprocket assembly in the present invention;

[0036] Fig.10 It is a schematic diagram of the structure on the fixed frame in the present invention;

[0037] Fig.11 It is a partial structural schematic diagram of the chain cleaning assembly in the present invention;

[0038] Fig.12 It is a schematic diagram of a part of the structure inside the fixed frame in the present invention;

[0039] Fig.13 It is a partial structural schematic diagram of the chain cleaning assembly in the present invention;

[0040] Fig.14 It is a schematic diagram of the present invention when it is working;

[0041] Fig.15 It is a schematic diagram of the second stretcher of the present invention when it is working.

[0042] In the figure: 1. lower fork assembly; 11. lower fork body; 12. universal coupling; 13. lower middle fork guide block; 14. lower middle fork guide wheel; 15. fixed frame; 16. drainage trough; 17. foam spray head; 18. liquid inlet pipe; 19. wiping cotton; 2. lower middle fork assembly; 21. lower middle fork body; 22. lower middle fork chain rack; 23. upper middle fork guide block; 24. upper middle fork guide wheel; 3. upper middle fork assembly; 31. upper middle fork body; 32. upper middle fork moving chain; 33. upper middle fork guide sprocket; 34. upper middle fork chain rack; 4. upper fork assembly; 41. upper fork body; 42. first upper fork moving chain; 43. second upper fork moving chain; 44. chain 45. upper fork moving guide block; 46. upper fork moving guide wheel; 5. first extension drive assembly; 51. first extension reduction motor; 52. first extension driving chain; 53. first extension transmission chain; 6. second extension drive assembly; 61. second extension reduction motor; 62. second extension driving chain; 63. second extension transmission chain; 7. double-row sprocket assembly; 71. sprocket shaft; 72. double-row sprocket body; 73. overwheel; 8. chain cleaning assembly; 81. side brush; 82. bottom brush; 83. first transmission wheel; 84. first transmission belt; 85. second transmission wheel; 86. first bevel gear; 87. second bevel gear; 88. second transmission belt; 89. third transmission belt. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] For example, see Figure 1-Figure 15A dust-resistant full-chain driven double-extension cargo fork comprises two sets of lower fork assemblies 1, two sets of lower middle fork assemblies 2, two sets of upper middle fork assemblies 3 and two sets of upper fork assemblies 4. The two sets of lower middle fork assemblies 2 are respectively slidably connected to the adjacent lower fork assemblies 1, the two sets of upper middle fork assemblies 3 are respectively slidably connected to the adjacent lower middle fork assemblies 2, and the two sets of upper fork assemblies 4 are respectively slidably connected to the adjacent upper middle fork assemblies 3. A first extension drive assembly 5 and a second extension drive assembly 6 are arranged below the two sets of lower fork assemblies 1. The first extension drive assembly 5 is connected to the upper middle fork assembly 3 through a chain, and the second extension drive assembly 6 is connected to the lower middle fork assembly 2 through a chain. Two universal couplings are arranged between the two sets of lower fork assemblies 1. 12, the first extension drive assembly 5 and the second extension drive assembly 6 are respectively connected to the adjacent universal coupling 12, the lower fork assembly 1 includes a lower fork body 11, the first extension drive assembly 5 and the second extension drive assembly 6 are both arranged below the lower fork body 11, and the inner walls on both sides of the lower fork body 11 are provided with a plurality of lower middle fork guide blocks 13 and lower middle fork guide wheels 14 for assisting the sliding of the lower middle fork assembly 2, and the lower fork body 11 is also provided with a fixed frame 15, the fixed frame 15 is arranged in the middle of the lower fork body 11, and a chain cleaning assembly 8 for cleaning the chain is installed on the fixed frame 15, and an auxiliary assembly for assisting the chain cleaning assembly 8 to clean the chain is arranged on the fixed frame 15;

[0046] When the device is started, firstly, according to the need of storing and retrieving goods, the appropriate one-extension drive assembly 5 or two-extension drive assembly 6 is selected and started. When the one-extension work is performed, the upper middle fork assembly 3 and the upper fork assembly 4 are driven to extend outward by the one-extension drive assembly 5, so as to realize one-extension storage and retrieval of goods;

[0047] When the second extension is in progress, the second extension drive assembly 6 is started, and the second extension drive assembly 6 first drives the lower middle fork assembly 2 to move, and the lower middle fork assembly 2 drives the upper middle fork assembly 3 and the upper fork assembly 4 to move through the chain, thereby realizing the second extension storage and retrieval of goods;

[0048] By means of the chain cleaning assembly 8 provided in the lower fork body 11, the chain in the lower fork body 11 can be cleaned as required during use, thereby ensuring the stability of the fork during operation.

[0049] For example 2, please refer to Figure 1-Figure 15The one-extension drive assembly 5 includes an extension reduction motor 51 and two one-extension driving chains 52, and the two one-extension driving chains 52 are respectively arranged in the two groups of lower fork bodies 11. The output end of the one-extension reduction motor 51 is connected to the first sprocket through a coupling, and the first sprocket is meshed with an extension transmission chain 53, and the one-extension transmission chain 53 is meshed with the one-extension driving chain 52 in the adjacent lower fork body 11. The end of the one-extension transmission chain 53 away from the one-extension reduction motor 51 is connected to one of the universal couplings 12, and the universal coupling 12 is meshed with the one-extension driving chain 52 in the other lower fork body 11 through sprocket meshing. Both ends of the lower fork body 11 are hinged with multiple groups of double-row sprocket assemblies 7, and the multiple groups of double-row sprocket assemblies 7 are meshed with the one-extension driving chain 52. The dynamic component 6 includes a two-extension reduction motor 61 and two two-extension driving chains 62, the two two-extension driving chains 62 are respectively arranged in two groups of lower fork bodies 11, the output end of the two-extension reduction motor 61 is connected to the second sprocket through a coupling, and the second sprocket is meshed with a two-extension transmission chain 63, the two-extension transmission chain 63 is meshed with the two-extension driving chain 62 in the adjacent lower fork body 11 through a chain, the end of the two-extension transmission chain 63 away from the two-extension reduction motor 61 is connected to the adjacent universal coupling 12, the side of the universal coupling 12 away from the two-extension transmission chain 63 is meshed with the two-extension driving chain 62 in the other group of lower fork bodies 11, the two two-extension driving chains 62 are respectively slidably sleeved on the multiple double-row sprocket assemblies 7 in the lower fork body 11, and the lower middle fork assembly 2 includes a lower middle fork The main body 21, the lower middle fork main body 21 is slidably connected to the lower fork main body 11, a lower middle fork chain rack 22 is provided in the lower middle fork main body 21, and the lower middle fork chain rack 22 is meshed with the two-extension active chain 62 in the lower fork main body 11, and a plurality of upper middle fork guide blocks 23 and an upper middle fork guide wheel 24 for assisting the sliding of the upper middle fork assembly 3 are also installed on both sides of the top of the lower middle fork main body 21, and the upper middle fork assembly 3 includes an upper middle fork main body 31, the upper middle fork main body 31 is slidably connected to the lower middle fork main body 21, an upper middle fork moving chain 32 is provided in the lower middle fork main body 21, and the upper middle fork moving chain 32 is meshed with the double-row sprocket assembly 7, and an upper middle fork guide sprocket 33 is also meshed at one end of the upper middle fork moving chain 32 close to the upper fork assembly 4, and a The upper middle fork chain tooth bar 34 meshed with the upper middle fork moving chain 32, the double-row sprocket assembly 7 includes a sprocket shaft 71, a double-row sprocket body 72 is arranged on the sprocket shaft 71, the double-row sprocket body 72 is respectively meshed with the upper middle fork moving chain 32 and the first extension driving chain 52, the sprocket shaft 71 is also provided with a pass wheel 73, and the second extension driving chain 62 is slidably connected to the pass wheel 73, the upper fork assembly 4 includes an upper fork body 41, a plurality of upper fork moving guide blocks 45 and upper fork moving guide wheels 46 are installed on the inner walls on both sides of the upper fork body 41, the upper fork body 41 is slidably connected to the upper middle fork assembly 3 through the upper fork moving guide blocks 45 and the upper fork moving guide wheels 46, the first upper fork moving chain 42 and the second upper fork moving chain 43 are installed in the upper fork body 41,One end of the first upper fork moving chain 42 and the second upper fork moving chain 43 close to the upper fork body 41 is installed in the upper fork body 41, and the other ends of the first upper fork moving chain 42 and the second upper fork moving chain 43 are fixedly connected to a chain fixing adjustment seat 44, and the first upper fork moving chain 42 and the second upper fork moving chain 43 are fixed to the lower middle fork body 21 through the chain fixing adjustment seat 44;

[0050] When the first extension work is performed, the first extension reduction motor 51 starts to execute the first extension instruction, and the first extension reduction motor 51 drives the first extension driving chain 52 to move through the first sprocket and the first extension transmission chain 53, and the first extension driving chain 52 drives the other first extension driving chain 52 in the lower fork body 11 to move synchronously through the universal coupling 12, so as to realize the synchronous movement of the double forks. With the movement of the first extension driving chain 52, the double-row sprocket assembly 7 is driven to rotate at the same time, so that the upper middle fork moving chain 32 drives the upper middle fork chain rack 34 to move. Since the upper middle fork body 31 is fixedly connected to the upper middle fork chain rack 34, when the upper middle fork chain rack 34 moves, the upper middle fork body 31 moves synchronously with the upper middle fork chain rack 34, and extends outward to perform the storage and retrieval operation, so as to realize the movement of the upper middle fork assembly 3. At the same time, when the first extension reduction motor 51 is started, the second extension reduction motor 61 is in a braking state, and the second extension driving chain 62 and the lower middle fork chain rack 22 are also fixed. At this time, the lower middle fork body 21 is in a stagnant state;

[0051] When the upper middle fork body 31 moves, the first upper fork moving chain 42 and the second upper fork moving chain 43 are pulled to move to one side by the chain fixing adjustment seat 44. Under the pulling of the chain, the upper fork body 41 and the upper middle fork body 31 are driven to extend in the same direction to realize the movement of the upper fork assembly 4. When the use is completed, the upper middle fork body 31 and the upper fork body 41 can be retracted by controlling the first extension reduction motor 51 to rotate in the opposite direction.

[0052] When the second extension is in progress, the second extension reduction motor 61 executes the second extension instruction, drives the second sprocket to drive the second extension driving chain 62 to move, and drives another set of the second extension driving chain 62 to move through the universal coupling 12, so as to realize the synchronous movement of the double forks. With the movement of the second extension driving chain 62, the lower middle fork chain rack 22 engaged with the second extension driving chain 62 also moves with the second extension driving chain 62. The lower middle fork chain rack 22 is fixed as a whole with the lower middle fork body 21, so the lower middle fork body 21 also moves with the lower middle fork chain rack 22. Because the upper middle fork moving chain 32 and the upper middle fork guide wheel 24 are fixed on the lower middle fork body 21, the upper middle fork moving chain 32 also moves in the same direction. Since the second extension driving chain 62 is clamped on the overwheel 73 of the sprocket shaft 71, when the second extension driving chain 62 moves, the double-row sprocket assembly 7 does not rotate.

[0053] When executing the second extension instruction, the first extension reduction motor 51 is in a braking state, the first extension driving chain 52 is also in a stopped state, the double-row sprocket assembly 7 is also in a stopped state, and the double-row sprocket assembly 7 is engaged with the upper middle fork moving chain 32. The upper middle fork moving chain 32 in a moving state interacts with the double-row sprocket assembly 7 in a fixed state that is engaged with each other, and the upper middle fork moving chain 32 rotates relatively, and the upper middle fork chain rack 34 engaged with the upper middle fork moving chain 32 moves with the chain, and the upper middle fork body 31 and the upper middle fork body 31 are engaged with each other. The fork chain rack 34 is integrally connected, so the upper middle fork body 31 also moves with the upper middle fork chain rack 34. The chain fixing adjustment seat 44 in the upper middle fork assembly 3 and the upper fork assembly 4 is fixed on the lower middle fork body 21, and is connected to the first upper fork moving chain 42 and the second upper fork moving chain 43. When the upper middle fork body 31 moves, it pulls the first upper fork moving chain 42 and the second upper fork moving chain 43 to one side. Due to the traction of the chain, the upper fork body 41 also moves in the same direction to complete the two extension instructions.

[0054] For example 3, please refer to Figure 3 , Fig.10 , Fig.11 , Fig.12 and Fig.13Two drainage grooves 16 are provided in the fixed frame 15, and the bottoms of the two drainage grooves 16 are connected to drainage pipes. Foam spray heads 17 are also provided on both sides of the inner wall of the fixed frame 15. Liquid inlet pipes 18 connected to the two foam spray heads 17 are provided on both sides of the fixed frame 15. A clean water spray head wiping cotton 19 is also provided on the end of the inner wall of the fixed frame 15 away from the foam spray head 17. The chain cleaning assembly 8 includes a plurality of side brushes 81, and the plurality of side brushes 81 are rotatably connected to the inner walls on both sides of the fixed frame 15, and the plurality of side brushes 81 are arranged between the foam spray heads 17 and the wiping cotton 19. A first transmission wheel 83 is installed on the two side brushes 81 on the same side, and the first transmission wheel 83 is installed in the inner wall of the fixed frame 15. A first transmission belt 84 is provided between two adjacent first transmission wheels 83, and the two first transmission wheels 83 are driven by the first transmission belt 84. The chain cleaning assembly 8 further comprises a bottom brush 82, the bottom brush 82 being rotatably connected to the bottom of the inner wall of the fixed frame 15, a second transmission wheel 85 being further arranged in the inner wall of the fixed frame 15, and the second transmission wheel 85 being arranged below one of the first transmission wheels 83, a second transmission belt 88 being arranged between the second transmission wheel 85 and the adjacent first transmission wheel 83, the second transmission wheel 85 being transmission-connected to the adjacent first transmission wheel 83 through the second transmission belt 88, a first bevel gear 86 being fixedly connected to the side of the second transmission wheel 85 close to the bottom brush 82 through a connecting shaft, a second bevel gear 87 being arranged at the bottom of the bottom brush 82, and the second bevel gear 87 being meshed with the first bevel gear 86;

[0055] When the chain needs to be cleaned, the liquid inlet pipe 18 is opened, so that the cleaning agent is sprayed on the chain passing through the fixed frame 15 through the liquid inlet pipe 18 and the foam spray head 17. When the chain continues to move forward, the sprocket shaft 71 is continuously driven to rotate, and the third transmission belt 89 connected to the sprocket shaft 71 rotates at the same time. The third transmission belt 89 drives one of the first transmission wheels 83 to rotate, and the two first transmission wheels 83 are synchronously rotated through the first transmission belt 84, so that the two side brushes 81 rotate to clean the surface of the chain, and the dust on the chain is removed by the cleaning agent. The chain continues to move forward, and the cleaning agent remaining on the surface is rinsed by the clean water sprayed by the clean water spray head, and then wiped clean by the wiping cotton 19 to complete the cleaning of the chain;

[0056] At the same time, when the two first transmission wheels 83 rotate, one of the first transmission wheels 83 drives the second transmission wheel 85 to rotate through the second transmission belt 88, and the second transmission wheel 85 drives the second bevel gear 87 to rotate through the first bevel gear 86, so that the bottom brush 82 rotates in the fixed frame 15, and the bottom of the chain is cleaned by the bottom brush 82, so that the chain cleaning assembly 8 cleans the chain in all directions;

[0057] The drainage groove 16 provided in the fixing frame 15 can collect the dripping detergent and clean water to avoid corrosion to other components.

[0058] The working principle of the present invention is as follows: when the device is started, firstly, according to the need of storing and retrieving goods, a suitable one-extending reduction motor 51 or two-extending reduction motors 61 are selected and started. When performing one-extending work, the one-extending reduction motor 51 drives the two one-extending active chains 52 to move, so that the two one-extending active chains 52 drive the upper middle fork moving chain 32 and the upper middle fork chain rack 34 to move through the double-row sprocket body 72, so that the upper middle fork body 31 is extended, and one-extending storing and retrieving goods is realized;

[0059] When the second extension is in progress, the second extension reduction motor 61 is started, and the second extension reduction motor 61 first drives the second extension driving chain 62 to move, and the second extension driving chain 62 drives the lower middle fork chain rack 22 to move through the chain, and the lower middle fork body 21 drives the upper middle fork body 31 to move together through the double-row sprocket assembly 7, and pulls the upper fork body 41 to move in the same direction through the chain fixing adjustment seat 44, thereby realizing the second extension storage and retrieval;

[0060] When the chain needs to be cleaned, the liquid inlet pipe 18 is opened, so that the detergent is sprayed on the chain passing through the fixed frame 15 through the liquid inlet pipe 18 and the foam spray head 17. As the chain continues to move forward, the sprocket shaft 71 is continuously driven to rotate, and the third transmission belt 89 connected to the sprocket shaft 71 rotates at the same time. The third transmission belt 89 drives the first transmission wheel 83 to rotate and the two first transmission wheels 83 rotate synchronously through the first transmission belt 84, so that the two side brushes 81 rotate to clean the surface of the chain. The chain continues to move forward and the clean water sprayed by the clean water spray head rinses the detergent remaining on the surface. The flowing water is discharged through the drainage groove 16 and wiped clean by the wiping cotton 19 to complete the cleaning of the chain.

[0061] At the same time, when the two first transmission wheels 83 rotate, one of the first transmission wheels 83 drives the second transmission wheel 85 to rotate through the second transmission belt 88, and the second transmission wheel 85 drives the second bevel gear 87 to rotate through the first bevel gear 86, so that the bottom brush 82 rotates in the fixed frame 15, and the bottom of the chain is cleaned by the bottom brush 82, so that the chain cleaning assembly 8 can clean the chain in all directions.

[0062] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0063] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust-resistant full chain-driven double-extension fork, characterized in that: The invention comprises two groups of lower fork assemblies (1), two groups of lower middle fork assemblies (2), two groups of upper middle fork assemblies (3) and two groups of upper fork assemblies (4), wherein the two groups of lower middle fork assemblies (2) are respectively slidably connected to adjacent lower fork assemblies (1), the two groups of upper middle fork assemblies (3) are respectively slidably connected to adjacent lower middle fork assemblies (2), and the two groups of upper fork assemblies (4) are respectively slidably connected to adjacent upper middle fork assemblies (3). A first extension drive assembly (5) and a second extension drive assembly (6) are arranged below the two groups of lower fork assemblies (1), wherein the first extension drive assembly (5) is connected to the upper middle fork assembly (3) via a chain, and the second extension drive assembly (6) is connected to the lower middle fork assembly (2) via a chain. Two universal couplings (12) are arranged between the two groups of lower fork assemblies (1), and the first extension drive assembly (5) and the second extension drive assembly (6) are respectively connected to adjacent universal couplings (12); The lower fork assembly (1) comprises a lower fork body (11); the first extension drive assembly (5) and the second extension drive assembly (6) are both arranged below the lower fork body (11); and the inner walls on both sides of the lower fork body (11) are provided with a plurality of lower middle fork guide blocks (13) and lower middle fork guide wheels (14) for assisting the lower middle fork assembly (2) to slide; a fixing frame (15) is also provided in the lower fork body (11); the fixing frame (15) is arranged in the middle of the lower fork body (11); a chain cleaning assembly (8) for cleaning a chain is installed on the fixing frame (15); and an auxiliary assembly for assisting the chain cleaning assembly (8) to clean the chain is provided on the fixing frame (15); the first extension drive assembly (5) comprises a A stretch reduction motor (51) and two stretch driving chains (52), the two stretch driving chains (52) are respectively arranged in two groups of lower fork bodies (11), the output end of the stretch reduction motor (51) is connected to a first sprocket through a coupling, the first sprocket is meshed with a stretch transmission chain (53), the stretch transmission chain (53) is meshed with a stretch driving chain (52) in an adjacent lower fork body (11), one end of the stretch transmission chain (53) away from the stretch reduction motor (51) is connected to one of the universal couplings (12), the universal coupling (12) is meshed with a stretch driving chain (52) in another lower fork body (11) through a sprocket, and both ends of the lower fork body (11) are hinged with a plurality of double-row A sprocket assembly (7), and a plurality of groups of double-row sprocket assemblies (7) are all meshed with a first extension driving chain (52); the second extension driving assembly (6) comprises a second extension reduction motor (61) and two second extension driving chains (62), the two second extension driving chains (62) are respectively arranged in two groups of lower fork bodies (11), the output end of the second extension reduction motor (61) is connected to a second sprocket via a coupling, the second sprocket is meshed with a second extension transmission chain (63), the second extension transmission chain (63) is meshed with the second extension driving chain (62) in the adjacent lower fork body (11) via a chain, the second extension transmission chain (63) is connected to an adjacent universal coupling (12) at one end away from the second extension reduction motor (61), and the universal coupling (12) is away from the second extension reduction motor (61). One side of the extension transmission chain (63) is meshed with two extension driving chains (62) in another group of lower fork bodies (11), and the two extension driving chains (62) are respectively slidably sleeved on a plurality of double-row sprocket wheel assemblies (7) in the lower fork body (11); the lower middle fork assembly (2) comprises a lower middle fork body (21), the lower middle fork body (21) is slidably connected to the lower fork body (11), a lower middle fork chain rack (22) is provided in the lower middle fork body (21), and the lower middle fork chain rack (22) is meshed with the two extension driving chains (62) in the lower fork body (11), and a plurality of upper middle fork guide blocks (23) and upper middle fork guide wheels (24) are also installed on both sides of the top of the lower middle fork body (21) to assist the upper middle fork assembly (3) in sliding;The upper middle fork assembly (3) comprises an upper middle fork body (31), the upper middle fork body (31) being slidably connected to the lower middle fork body (21), an upper middle fork movable chain (32) being arranged in the lower middle fork body (21), and the upper middle fork movable chain (32) being meshed with the double-row sprocket assembly (7), an upper middle fork guide sprocket (33) being meshed at one end of the upper middle fork movable chain (32) close to the upper fork assembly (4), an upper middle fork chain tooth (34) being meshed with the upper middle fork movable chain (32) being installed in the upper middle fork body (31); the double-row chain The wheel assembly (7) comprises a sprocket shaft (71), on which a double-row sprocket body (72) is arranged, and the double-row sprocket body (72) is respectively meshed with the upper middle fork moving chain (32) and the first extension driving chain (52), and the sprocket shaft (71) is also provided with a passing wheel (73), and the second extension driving chain (62) is slidably connected to the passing wheel (73); the upper fork assembly (4) comprises an upper fork body (41), and the inner walls on both sides of the upper fork body (41) are provided with a plurality of upper fork moving guide blocks (45) and upper fork moving guide wheels (46), The upper fork body (41) is slidably connected to the upper middle fork assembly (3) via an upper fork moving guide block (45) and an upper fork moving guide wheel (46); a first upper fork moving chain (42) and a second upper fork moving chain (43) are installed in the upper fork body (41); one end of the first upper fork moving chain (42) and the second upper fork moving chain (43) close to the upper fork body (41) are installed in the upper fork body (41); the other ends of the first upper fork moving chain (42) and the second upper fork moving chain (43) are fixedly connected to a chain fixing adjustment seat (44). The first upper fork moving chain (42) and the second upper fork moving chain (43) are fixed to the lower middle fork body (21) via a chain fixing adjustment seat (44); two drainage grooves (16) are arranged in the fixing frame (15); foam spray heads (17) are arranged on both sides of the inner wall of the fixing frame (15); liquid inlet pipes (18) connected to the two foam spray heads (17) are arranged on both sides of the fixing frame (15); a clean water spray head and a wiping cotton (19) are also arranged on the end of the inner wall of the fixing frame (15) away from the foam spray heads (17);The chain cleaning assembly (8) comprises a plurality of side brushes (81), the plurality of side brushes (81) being rotatably connected to the inner walls on both sides of the fixed frame (15), and the plurality of side brushes (81) being arranged between the foam spray head (17) and the wiping cotton (19), two side brushes (81) located on the same side being installed with a first transmission wheel (83), and the first transmission wheel (83) being installed in the inner wall of the fixed frame (15), a first transmission belt (84) being arranged between two adjacent first transmission wheels (83), the two first transmission wheels (83) being connected in transmission via the first transmission belt (84), and a third transmission belt (89) being arranged on the first transmission wheel (83) close to the foam spray head (17), and the other end of the third transmission belt (89) being connected to the sprocket shaft (71) in the lower fork body (11); The chain cleaning assembly (8) further comprises a bottom brush (82), the bottom brush (82) being rotatably connected to the bottom of the inner wall of the fixed frame (15), a second transmission wheel (85) being arranged in the inner wall of the fixed frame (15), and the second transmission wheel (85) being arranged below one of the first transmission wheels (83), a second transmission belt (88) being arranged between the second transmission wheel (85) and the adjacent first transmission wheel (83), the second transmission wheel (85) being transmission-connected to the adjacent first transmission wheel (83) via the second transmission belt (88), a first bevel gear (86) being fixedly connected to the side of the second transmission wheel (85) close to the bottom brush (82) via a connecting shaft, a second bevel gear (87) being arranged at the bottom of the bottom brush (82), and the second bevel gear (87) being meshed with the first bevel gear (86). ; 2. The dust-resistant full chain-driven double-extension fork according to claim 1, characterized in that: The bottoms of the two drainage grooves (16) are both connected to a drainage pipe.

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