Large-section heavy-load multi-fork-body telescopic pallet fork

Abstract

The utility model discloses a large-section multi-fork-body heavy-load telescopic pallet fork which comprises a plurality of fork bodies, every two fork bodies are connected through a universal driving shaft, a driving assembly is installed below one fork body, each fork body comprises an upper fork, a middle fork and a lower fork which are movably connected in sequence, universal flange plates are installed at the two ends of each universal driving shaft, and the universal flange plates are connected with the universal driving shafts. The driving assembly comprises a gear motor and a first chain wheel in driving connection with an output shaft of the gear motor, a gear shaft is installed on the lower fork, a torque limiter is installed at one end of the gear shaft, the other end of the gear shaft is connected with a universal flange plate, a second chain wheel is arranged on the torque limiter and connected with the first chain wheel through a chain, and the gear motor drives the torque limiter through the first chain wheel. And the torque limiter and the gear shaft coaxially transmit power to the transmission gear on the lower fork. The automatic picking and placing device is used in cooperation with the stacking machine so as to achieve automatic picking and placing of large-load long goods in the three-dimensional warehouse.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics machinery, in particular to a large-section multi-fork heavy-load telescopic fork. Background Art

[0002] With the acceleration of economic globalization, the huge potential contained in automated warehouses is attracting more and more attention. As an important component of the logistics center, the automated warehouse (Automatic Storage & Retrieval System) directly affects the strategy and planning formulated by the enterprise, and directs and adjusts the enterprise's actions. Due to the high storage and retrieval efficiency of the automated warehouse, it can effectively connect the production links outside the warehouse, and can form an automated logistics system in storage, thus forming a planned and organized production chain, which has greatly improved production capacity. It has become one of the symbols of enterprise production and management informationization. Forks are one of the core equipment of the entire automated warehouse. Telescopic forks are widely used in the logistics industry for the handling and storage of goods. Nowadays, the production capacity demand for longer materials such as steel pipes and rebars in steel mills is increasing, and the demand for three-dimensional storage space for these long materials is also increasing.

[0003] Therefore, there is a need for a telescopic fork that can adapt to the handling of long materials, that is, a telescopic fork with a large cross-section, multiple forks and a large load capacity, so that it can be combined with a stacker to realize the automatic pick-and-place operation of long materials in the three-dimensional warehouse. Among them, the large cross-section means that the cross-section of the fork is larger than that of the traditional telescopic fork, and the load-bearing strength is stronger. The multiple forks refer to the number of fork bodies, which are more applicable in a wider range of occasions. It is not only used for cargo handling and storage, but also for longer cargo, such as steel pipes, rectangular pipes, aluminum profiles, water pipes and other cargo with a length of about 10 to 12 meters. The large load refers to cargo with a load capacity of about 30 tons.

[0004] In summary, how to provide a telescopic fork that can be used in conjunction with a stacker to automatically pick up and place heavy-load long goods in a three-dimensional warehouse has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a large-section multi-fork heavy-load telescopic fork.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A large-section multi-fork large-load telescopic fork, comprising a plurality of fork bodies, two of the fork bodies being connected via a universal drive shaft, a drive assembly being mounted below one of the fork bodies, the fork body comprising an upper fork, a middle fork and a lower fork movably connected in sequence; universal flanges being mounted at both ends of each of the universal drive shafts, the drive assembly comprising a reduction motor and a first sprocket drively connected to the output shaft of the reduction motor, a gear shaft being mounted on the lower fork, a torque limiter being mounted at one end of the gear shaft and the universal flange being connected at the other end, a second sprocket being mounted on the torque limiter, the second sprocket being connected to the first sprocket via a chain; the reduction motor drives the torque limiter via the first sprocket, and the torque limiter and the gear shaft coaxially transmit power to a transmission gear on the lower fork;

[0008] The transmission gear drives the upper fork to extend from the middle fork and drives the middle fork to extend from the lower fork.

[0009] Furthermore, a flying sprocket is installed on the middle fork, and a leaf chain is installed on the upper fork. The leaf chain extends from the upper fork and is wound around the flying sprocket. The leaf chain is connected to the lower fork via the protruding end of the flying sprocket. The upper fork, the middle fork and the lower fork are connected by the leaf chain.

[0010] Furthermore, the lower fork is installed on the cargo platform of the stacker, a gear train is installed on the lower fork, and a rack is provided on the middle fork, and the rack is meshed with the gear train.

[0011] Furthermore, the transmission gear is engaged with the gear train, and the gear shaft transmits power to the gear train through the transmission gear.

[0012] Furthermore, a bearing seat is installed on the gear shaft.

[0013] Furthermore, the upper fork and the middle fork are slidably connected via a first sliding structure, the first sliding structure comprising a first sliding member and a first sliding groove, one of the first sliding member and the first sliding groove being provided on the upper fork, and the other being provided on the middle fork, and the first sliding member sliding on the first sliding groove to achieve sliding fit between the upper fork and the middle fork;

[0014] The middle fork and the lower fork are slidably connected via a second sliding structure, which includes a second sliding member and a second sliding groove. One of the second sliding member and the second sliding groove is provided on the middle fork, and the other is provided on the lower fork. The second sliding member slides on the second sliding groove to achieve sliding fit between the middle fork and the lower fork.

[0015] Furthermore, a tensioner is installed on the lower fork, and the tensioner is connected to the plate chain.

[0016] Furthermore, the reduction motor includes a first reduction motor and a second reduction motor, and the first reduction motor and the second reduction motor are both installed under the lower fork through a motor bracket. The output shaft of the first reduction motor drives the connected first sprocket, and the second reduction motor is a spare motor.

[0017] Furthermore, the gear train includes a large gear and a small gear that are meshed with each other.

[0018] Compared with existing technologies, the advantages of this utility model lie in: multiple forks are connected by a universal drive shaft, allowing the number of forks to be increased or decreased according to actual needs. This makes it suitable for a wide range of applications, not only for cargo handling and storage, but also for longer cargo, such as steel pipes, rectangular tubes, aluminum profiles, water pipes, and other goods up to 10-12 meters in length. When used in conjunction with a stacker crane, it can automatically retrieve and place large, long cargo within a three-dimensional warehouse. The fork cross-section is larger than that of traditional telescopic forks, providing greater load-bearing strength, solving the problem of insufficient strength and stability under long and heavy load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Attachment Figure 1 This is a schematic diagram of the usage state of an embodiment of the present application;

[0021] Attachment Figure 2 This is a schematic structural diagram of an embodiment of the present application;

[0022] Attachment Figure 3 This is a schematic diagram of the structure of the drive assembly according to an embodiment of the present application;

[0023] Attachment Figure 4 It is a schematic cross-sectional view of an embodiment of the present application.

[0024] Description of reference numerals and components in the accompanying drawings:

[0025] 1. Fork body; 2. Universal drive shaft; 3. Drive assembly; 31. Reducer motor; 32. First sprocket; 4. Upper fork; 41. Leaf chain; 5. Middle fork; 6. Lower fork; 61. Gear shaft; 62. Torque limiter; 63. Second sprocket; 64. Lower fork roller; 65. Lower fork guide block; 66. Gear train; 7. Universal flange; 8. Chain; 9. Transmission gear; 10. Tensioner; 11. Motor bracket; 12. Bearing seat. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solution of the present invention through specific implementation methods. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] See attached Figures 1 to 4 As shown, a large-section multi-fork large-load telescopic fork of the present application includes several fork bodies 1, and the two fork bodies 1 are connected by a universal drive shaft 2, wherein a drive assembly 3 is installed under one fork body 1, and the fork body 1 includes an upper fork 4, a middle fork 5 and a lower fork 6 that are movably connected in sequence, and a universal flange 7 is installed at both ends of each universal drive shaft 2. The drive assembly 3 includes a reduction motor 31 and a first sprocket 32 ​​that is drive-connected to the output shaft of the reduction motor 31, a gear shaft 61 is installed on the lower fork 6, a torque limiter 62 is installed at one end of the gear shaft 61, and the other end is connected to the universal flange 7, a second sprocket 63 is provided on the torque limiter 62, and the second sprocket 63 is connected to the first sprocket 32 ​​by a chain 8, the reduction motor 31 drives the torque limiter 62 through the first sprocket 32, and the torque limiter 62 and the gear shaft 61 coaxially transmit power to the transmission gear 9 on the lower fork 6, and the transmission gear 9 drives the upper fork 4 to extend from the middle fork 5 and drives the middle fork 5 to extend from the lower fork 6.

[0028] The above structure is further described below:

[0029] The particularity of this application is reflected in three elements, namely, large cross-section, large load and multiple forks. The so-called large cross-section refers to the large cross-section size of the fork. The cross-section refers to the width of the upper fork 4 and the size from the upper surface of the upper fork 4 to the lower surface of the middle fork 5. The larger the cross-section size, the greater the load it can carry. The length of the fork body 1 is about 1 meter to 3 meters. The length of the fork body 1 depends on the length and width of the cargo. The corresponding size can be designed according to actual needs. The above specifications are different from the dimensions of traditional forks. They are much larger than the cross-section dimensions of traditional forks. The larger the cross-section, the greater the strength of the fork and the weight of the cargo that can be carried, thereby reflecting the characteristics of large loads. The driving motors of this application are two high-power and high-torque reduction motors 31, which can provide sufficient driving torque. The fork can carry a load of about 30 tons. The characteristics of the multiple forks are not only attached Figure 1 The four forks 1 shown can be increased to five, six or even more forks. The number of forks can be increased or decreased according to actual needs, so that the fork can be used for longer cargo and can carry cargo of about ten to twenty meters in length. When the fork load is 30 tons, the deflection of the fork is about 30 mm. The spacing between the forks 1 is adjusted according to the length and weight of the cargo, and the longer the spacing between the forks 1, the longer the universal joint shaft 2.

[0030] See attached Figures 1 to 4 As shown, the upper fork 4 and the middle fork 5 are slidably connected by a first sliding structure, which includes a first sliding member and a first chute. One of the first sliding member and the first chute is provided on the upper fork 4, and the other is provided on the middle fork 5. The first sliding member slides on the first chute to achieve sliding cooperation between the upper fork 4 and the middle fork 5. The first sliding member of the present application includes an upper fork roller and an upper fork guide block, which are sequentially mounted on the inner wall of the upper fork 4. The first chute is provided on the outer wall of the middle fork 5. The upper fork 4 is sleeved on the middle fork 5 via the upper fork roller and the upper fork guide block, and slides on the middle fork 5 via the upper fork roller and the upper fork guide block. The middle fork 5 and the lower fork 6 are slidably connected by a second sliding structure, which includes a second sliding member and a second chute. One of the second sliding member and the second chute is provided on the middle fork 5, and the other is provided on the lower fork 6. The second sliding member slides on the second chute to achieve sliding cooperation between the middle fork 5 and the lower fork 6. The second sliding member of the present application includes a lower fork roller 64 and a lower fork guide block 65, which are sequentially mounted on the outer wall of the lower fork 6. A second sliding groove is provided on the inner wall of the middle fork 5. The middle fork 5 is sleeved onto the lower fork 6 via the lower fork roller 64 and the lower fork guide block 65, and slides on the lower fork 6 via the lower fork roller 64 and the lower fork guide block 65. The upper fork roller, upper fork guide block, lower fork roller 64, and lower fork guide block 65 of the present application are all support and guide devices, serving as support and guidance. Specifically, the support and guide devices of the upper fork 4 are designed on the inner wall of the upper fork 4, while the support and guide devices of the lower fork 6 are designed on the outer wall of the lower fork 6. A groove for supporting the support and guide devices of the upper fork 4 is provided on the outer side of the middle fork 5, while a groove for supporting the support and guide devices of the lower fork 6 is provided on the inner side. Furthermore, the upper fork 4, the middle fork 5, and the lower fork 6 are enabled to slide relative to each other through the support and guide devices.

[0031] The middle fork 5 of the present application is mounted with a fly sprocket, and the upper fork 4 is mounted with a leaf chain 41. The leaf chain 41 extends from the upper fork 4 and is wound around the fly sprocket. The leaf chain 41 is connected to the lower fork 6 via the extended end of the fly sprocket. The upper fork 4 and the lower fork 6 are connected by the leaf chain 41 running around the fly sprocket on the middle fork 4. In this embodiment, one end of the leaf chain 41 is fixed to the inner wall of the upper fork 4, and the other end is fixed to the side wall of the lower fork 6. A tensioner 10 is mounted on the lower fork 6. The slider head of the tensioner 10 is connected to the leaf chain 41. The tensioner 10 is used to adjust the tension of the leaf chain 41. The leaf chain 41 is then wound around the fly sprocket on the middle fork 5. The middle fork 5 is equipped with two fly sprockets, which are respectively arranged on the inner walls of the middle fork 5 on both sides. The two fly sprockets are located at the two ends of the middle fork 5 along the length direction, that is, they are arranged in opposite directions between the two fly sprockets. The lower fork 6 is fixed to the stacker loading platform. The lower fork 6 is equipped with a gear train 66, which consists of large and small gears that mesh with each other. The middle fork 5 is equipped with a rack, and the ends of the rack are respectively fixed to the upper fork 4 and the lower fork 6. The gear train 66 meshes with the rack on the middle fork 5, thereby transmitting power from the lower fork 6 to the middle fork 5.

[0032] The drive assembly 3 includes a reduction motor 31 and a first sprocket 32 ​​driven and connected to the output shaft of the reduction motor 31. The reduction motor 31 includes a first reduction motor and a second reduction motor, and the first reduction motor and the second reduction motor are used as a backup, that is, the second reduction motor is a backup motor for the first reduction motor. The first reduction motor and the second reduction motor are both installed under the lower fork 6 through the motor bracket 11. The motor bracket in this embodiment is an adjustable mechanism and a tensioning mechanism, which is used for chain tensioning, that is, the first reduction motor and the second reduction motor are both installed with a first sprocket 32, model 16B-2, on their output shafts. A gear shaft 61 is mounted on the lower fork 6. A torque limiter 62 is mounted on one end of the gear shaft 61, and the other end is connected to a universal flange 7. A second sprocket 63 is mounted on the torque limiter 62. The second sprocket 63 is the same model as the first sprocket 32. The second sprocket 63 is connected to the first sprocket 32 ​​via a chain 8. The reduction motor 31 drives the torque limiter 62 by driving the first sprocket 32. The torque limiter 62 and the gear shaft 61 coaxially transmit power to the transmission gear 9 on the lower fork 6. To prevent the gear shaft 61 from bending due to excessive tension in the chain 8, a bearing seat 12 is mounted on the end of the gear shaft 61 to strengthen the strength of the gear shaft 61. Two meshing transmission gears 9 are mounted on the lower fork 6 of the present application. The gear shaft 61 transmits power to the gear train 66 by meshing the two transmission gears 9.

[0033] That is, the reduction motor 31 of the present application provides a power source, which drives the torque limiter 62 through the first sprocket 32 ​​and the second sprocket 63. The torque limiter 62 and the gear shaft 61 coaxially transmit power to the transmission gear 9. The transmission gear 9 engages with a gear system 66 composed of a large gear and a small gear meshing with each other. The gear system 66 engages with the rack on the middle fork 5. The rack is installed on the middle fork 5. The two ends of the rack 5 are respectively fixed to the upper fork 4 and the lower fork 6 through the plate chain 41. The plate chain 41 is wound around the flying sprocket on the middle fork 5 to transfer the kinetic energy of the middle fork 5 to the upper fork 4, thereby completing the entire kinetic energy transmission.

[0034] Better, see attached Figures 1 to 3 As shown, the two fork bodies 1 of this embodiment are connected by a universal joint shaft 2, both ends of the universal joint shaft 2 are installed on the universal flange 7, and the universal flange 7 is connected to the gear shaft 61 to transmit power to each fork body 1, thereby driving the entire set of forks to operate.

[0035] Better, see attached Figure 1 and attached Figure 2 As shown, the reduction motor 31 of this embodiment drives the gear train 66 in the lower fork 6 to enable the upper fork 4 and the middle fork 5 to extend in sequence, wherein the sliding speed of the upper fork 4 is twice that of the middle fork 5.

[0036] The above description of the disclosed embodiments will enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large-section, large-load, multi-fork telescopic fork, characterized in that: The transmission gear of claim 1, wherein the first gear is connected to the transmission gear of the present invention and the second gear is connected to the transmission gear of the present invention; the transmission gear of the present invention is connected to the transmission gear of the present invention in an intermittent manner; the transmission gear of the present invention is connected to the transmission gear of the present invention in an intermittent manner; the transmission gear of the present invention is connected to the transmission gear of the present invention in an intermittent manner; the transmission gear of the present invention is connected to the transmission gear of the present invention in an intermittent manner; The transmission gear drives the upper fork to extend from the middle fork and drives the middle fork to extend from the lower fork.

2. A large-section, large-load, multi-fork telescopic fork according to claim 1, characterized in that: A flying sprocket is installed on the middle fork, and a leaf chain is installed on the upper fork. The leaf chain extends from the upper fork and is wound around the flying sprocket. The leaf chain is connected to the lower fork via the extended end of the flying sprocket. The upper fork, the middle fork and the lower fork are connected by the leaf chain.

3. The large-section, large-load, multi-fork telescopic fork according to claim 1, characterized in that: The lower fork is installed on the cargo platform of the stacker. A gear train is installed on the lower fork. A rack is provided on the middle fork. The rack is meshed with the gear train.

4. A large-section, large-load, multi-fork telescopic fork according to claim 3, characterized in that: The transmission gear is engaged with the gear train, and the gear shaft transmits power to the gear train through the transmission gear.

5. The large-section, large-load, multi-fork telescopic fork according to claim 1, characterized in that: A bearing seat is installed at the gear shaft.

6. The large-section, large-load, multi-fork telescopic fork according to claim 1, characterized in that: The upper fork and the middle fork are slidably connected via a first sliding structure, wherein the first sliding structure includes a first sliding member and a first sliding groove, wherein one of the first sliding member and the first sliding groove is provided on the upper fork, and the other is provided on the middle fork, and the first sliding member slides on the first sliding groove to achieve sliding fit between the upper fork and the middle fork; The middle fork and the lower fork are slidably connected via a second sliding structure, which includes a second sliding member and a second sliding groove. One of the second sliding member and the second sliding groove is provided on the middle fork, and the other is provided on the lower fork. The second sliding member slides on the second sliding groove to achieve sliding fit between the middle fork and the lower fork.

7. The large-section, large-load, multi-fork telescopic fork according to claim 2, characterized in that: A tensioner is installed on the lower fork, and the tensioner is connected to the plate chain.

8. The large-section, large-load, multi-fork telescopic fork according to claim 1, characterized in that: The reduction motor includes a first reduction motor and a second reduction motor. The first reduction motor and the second reduction motor are both installed below the lower fork through a motor bracket. The output shaft of the first reduction motor drives the connected first sprocket, and the second reduction motor is a spare motor.

9. The large-section, large-load, multi-fork telescopic fork according to claim 3, characterized in that: The gear train includes a large gear and a small gear that are meshed with each other.

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