Direct-connection rotating mechanism and electric three-way fork

Abstract

This utility model discloses a direct-drive rotating mechanism, relating to the field of cargo handling technology. The mechanism includes a rotating shaft, a high-ratio reducer, and a first servo motor. The output end of the first servo motor is connected to the input end of the high-ratio reducer, and the output end of the high-ratio reducer is connected to the rotating shaft. This direct-drive transmission structure, where the output end of the first servo motor is directly connected to the input end of the high-ratio reducer, and the output end of the high-ratio reducer is directly connected to the rotating shaft, completely eliminates the transitional reduction gear set used in existing electric drive solutions. This avoids problems such as center distance error and backlash caused by multi-gear meshing. The rotational clearance of the rotating shaft is controlled solely by the precision gears inside the high-ratio reducer, effectively reducing the transmission clearance of the rotating shaft. This prevents significant wobbling of the forklift due to increased clearance, improving the stability and accuracy of stacking operations.

Description

Technical Field

[0001] This utility model relates to the field of cargo handling technology, and more specifically, to a direct-drive rotating mechanism and an electric three-way fork. Background Technology

[0002] In the field of three-way forklift technology, the core function is to achieve fork rotation. Existing technologies employ various methods to achieve this rotation, primarily including the following: First, a sprocket is mounted on the rotating shaft, and two hydraulic cylinders are installed on the bridge. The piston rods of the cylinders pull a chain that passes over the sprocket, and the extension and retraction of the two cylinders drive the rotating shaft to rotate. Second, a hydraulic motor is used as the power source, and its output is transmitted to the rotating shaft through a reduction gear set, thereby driving it to rotate at a low speed. Third, a helical oscillating hydraulic cylinder is used to directly output low-speed, high-torque rotational motion, with the fork carriage directly mounted on its output shaft. While the first three technical solutions differ in specific structures, they all fall under the category of hydraulic drive. They generally suffer from insufficient control precision and response speed, and also perform poorly in terms of energy consumption, efficiency, and environmental protection, making them ill-suited to the current industry trends of electrification and intelligentization.

[0003] To overcome the inherent drawbacks of hydraulic drives, the industry is actively exploring electric drive solutions. One approach involves a fourth method: using a geared motor combined with a reduction gear set. This method replaces hydraulic drives with electric motors, effectively avoiding the shortcomings of hydraulic systems in terms of accuracy, response, and energy consumption. However, the small reducer equipped with the motor in this solution has a limited reduction ratio. To achieve the low-speed, high-torque output required by the rotating shaft, a transitional reduction gear set must be added between the motor reducer and the rotating shaft. This intermediate gear transmission structure not only significantly increases the complexity of the bridge structure and manufacturing costs, but its transmission performance is also highly susceptible to factors such as gear machining accuracy, center distance assembly errors, and backlash. This results in a significant rotational backlash at the transmission end of the rotating shaft. When this backlash is amplified by the fork carriage, it manifests as noticeable wobbling during fork operation, severely impacting the accuracy and stability of stacking operations and the user experience of the equipment. Utility Model Content

[0004] This invention provides a direct-drive rotating mechanism and an electric three-way fork, which can solve the problem that in the prior art, the reduction gear set not only significantly increases the complexity of the bridge structure and the processing and manufacturing cost, but also its transmission performance is greatly affected by factors such as gear processing accuracy, center distance assembly error and tooth backlash.

[0005] A direct-drive rotating mechanism includes a rotating shaft, a high-ratio reducer, and a first servo motor. The output end of the first servo motor is connected to the input end of the high-ratio reducer, and the output end of the high-ratio reducer is connected to the rotating shaft to drive the rotating shaft to rotate at a low speed. The rotating shaft is mounted on a cable tray via a first mounting bearing and is connected to the fork carriage to directly drive the fork carriage to rotate.

[0006] The direct-drive rotary mechanism provided by this utility model has, but is not limited to, the following beneficial effects compared with the prior art: This direct-drive rotating mechanism directly connects the output of the first servo motor to the input of the high-ratio reducer, and the output of the high-ratio reducer to the rotating shaft. This direct-drive structure completely eliminates the transitional reduction gear set used in existing electric drive solutions, avoiding problems such as center distance error and backlash caused by multi-gear meshing. The rotational clearance of the rotating shaft is controlled solely by the precision gears inside the high-ratio reducer, effectively reducing the transmission clearance of the rotating shaft. This prevents significant wobbling of the fork carriage due to increased clearance, improving the stability and accuracy of stacking operations. At the same time, it eliminates the need to machine the high-precision positioning structure required for gear assembly on the bridge frame, significantly reducing the machining complexity and manufacturing cost of the bridge frame.

[0007] Furthermore, the output end of the high-ratio reducer is detachably connected to the rotating shaft via a spline, and the housing of the high-ratio reducer is detachably connected to the bridge frame.

[0008] Furthermore, the reduction ratio of the high-ratio reducer is 300-700.

[0009] Furthermore, the support portions at both ends of the rotating shaft are provided with a lubrication structure, which includes a grease nipple disposed on the side of the first mounting bearing, a rotating lip seal and a lower baffle for sealing, the rotating lip seal being disposed on one side of the first mounting bearing, and the lower baffle being disposed on the bottom of the first mounting bearing.

[0010] Furthermore, the high-ratio reducer has an L-shaped structure.

[0011] An electric three-way fork includes a bridge, a drive mechanism, and a fork carriage. The bridge is slidably connected to a carriage, the drive mechanism is mounted on the bridge and is used to drive the bridge to move along the carriage, and the fork carriage is mounted on the bridge via a rotating shaft.

[0012] Furthermore, the bridge frame is equipped with an upper roller, a lower roller, and a main roller. The upper roller and the lower roller are adapted to be embedded in the raceway of the carriage and roll left and right along the raceway. The main roller is pressed against the surface of the carriage and rolls left and right synchronously with the bridge frame.

[0013] Furthermore, a gear shaft is also installed on the bridge frame, and both ends of the gear shaft are rotatably connected to the bridge frame through a second mounting bearing. A drive gear and a transmission gear are installed on the gear shaft, and a rack that meshes with the drive gear is provided on the slide.

[0014] Furthermore, the drive mechanism includes a small speed ratio reducer and a second servo motor, which are mounted on a bridge frame. The output end of the second servo motor is connected to the input end of the small speed ratio reducer. The output end of the small speed ratio reducer is provided with a drive gear, which meshes with a transmission gear.

[0015] Furthermore, the reduction ratio of the small speed ratio reducer is 50-150. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a direct-drive rotating mechanism according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an electric three-way fork according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the installation of a direct-drive rotating mechanism according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Rotary shaft; 2. High-ratio reducer; 3. First servo motor; 4. First mounting bearing; 5. Grease fitting; 6. Rotary lip seal; 7. Lower baffle; 8. Cable tray; 9. Drive mechanism; 10. Fork carriage; 11. Carriage; 12. Upper roller; 13. Lower roller; 14. Main roller; 15. Gear shaft; 16. Second mounting bearing; 17. Drive gear; 18. Transmission gear; 19. Low-ratio reducer; 20. Second servo motor; 21. Drive gear; 22. Rack. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, in the attached diagram, the X-axis represents the horizontal direction, that is, the front-to-back position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the back; in the attached diagram, the Y-axis represents the horizontal direction, that is, the left-to-right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up-to-down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0022] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] See Figures 1-2 As shown in the figure, the present invention provides a direct-drive rotating mechanism, including a rotating shaft 1, a high-ratio reducer 2 and a first servo motor 3. The output end of the first servo motor 3 is connected to the input end of the high-ratio reducer 2, and the output end of the high-ratio reducer 2 is connected to the rotating shaft 1 to drive the rotating shaft 1 to rotate at a low speed. The rotating shaft 1 is mounted on the bridge frame 8 through a first mounting bearing 4 and is connected to the fork carriage 10 to directly drive the fork carriage 10 to rotate.

[0027] In this embodiment, a direct-drive structure is used, where the output of the first servo motor 3 is directly connected to the input of the high-ratio reducer 2, and the output of the high-ratio reducer 2 is directly connected to the rotating shaft 1. This completely eliminates the transitional reduction gear set used in existing electric drive solutions, avoiding problems such as center distance error and backlash caused by multi-gear meshing. The rotational clearance of the rotating shaft 1 is controlled solely by the precision gears inside the high-ratio reducer 2, effectively reducing the transmission clearance of the rotating shaft 1. This prevents significant wobbling of the fork carriage 10 due to increased clearance, improving the stability and precision of stacking operations. Furthermore, it eliminates the need for machining the high-precision positioning structure required for gear assembly on the bridge frame 8, significantly reducing the machining complexity and manufacturing cost of the bridge frame 8. The rotating shaft 1 is mounted on the bridge frame 8 via the first mounting bearing 4, which can simultaneously withstand radial and axial loads. This effectively disperses the combined stress generated when the rotating shaft 1 drives the fork carriage 10 to rotate, preventing the rotating shaft 1 from shifting or deforming due to uneven force, extending the service life of the rotating shaft 1, and ensuring the coaxiality of the rotating shaft 1 during rotation, further improving the smoothness of the rotating action of the fork carriage 10.

[0028] Specifically, the transmission combination of the first servo motor 3 and the high-ratio reducer 2 can not only achieve precise angle adjustment of the rotating shaft 1 through the high-precision control of the servo motor, but also convert the high-speed, low-torque power of the servo motor into the low-speed, high-torque required by the rotating shaft 1 with the help of the high-ratio reducer 2, so as to ensure that the fork carriage 10 can still rotate smoothly when carrying a full load, and meet the operation requirements under heavy load conditions.

[0029] Among them, the high-ratio reducer 2 has an L-shaped structure. The L-shaped structure allows the input end (the end connected to the first servo motor 3) and the output end (the end connected to the rotating shaft 1) of the high-ratio reducer 2 to form a vertical or nearly vertical angle, which can cleverly avoid the installation space of the rotating shaft 1 at the front of the bridge frame 8 and the layout area of ​​the rear side-shifting mechanism, avoiding interference between the components in the limited bridge frame space, making the overall structure of the bridge frame 8 more compact, and saving more than 30% of the lateral installation space compared with the straight-tube type reducer. The L-shaped structure allows the housing of the high-ratio reducer 2 to fit the contour surface of the bridge frame 8 more closely. With the detachable stop connection between the housing and the bridge frame 8, the overhang length of the reducer after installation can be reduced, the additional bending moment of the rotating shaft 1 caused by the weight of the reducer can be reduced, the first mounting bearing 4 can be prevented from bearing additional radial load, the bearing service life can be extended, and the coaxiality of the rotating shaft 1 during rotation can be ensured, reducing the sway of the fork carriage 10.

[0030] like Figure 1 As shown, the output end of the high-ratio reducer 2 is detachably connected to the rotating shaft 1 via a spline, and the housing of the high-ratio reducer 2 is detachably connected to the bridge frame 8.

[0031] In this embodiment, the spline connection has advantages over ordinary flat key connections in terms of high centering accuracy and strong load-bearing capacity. It can ensure that the output end of the high-ratio reducer 2 and the rotating shaft 1 maintain coaxiality during long-term high-torque transmission, avoiding the increase in transmission clearance caused by loose connection, thereby reducing the sway of the fork carriage 10. At the same time, the detachable nature of the spline makes it easy to disassemble and replace the rotating shaft 1 or the high-ratio reducer 2 separately in the future without the need for an overall disassembly mechanism, which greatly reduces the difficulty of maintenance. Through the detachable connection between the housing of the high-ratio reducer 2 and the bridge frame 8, on the one hand, the installation position of the reducer can be flexibly adjusted according to the spatial layout of the bridge frame 8, which is especially suitable for the compact installation requirements of L-shaped structure reducers. On the other hand, when the reducer fails, it can be directly removed from the bridge frame 8 for repair without processing or modification of the bridge frame 8 body, reducing equipment downtime for maintenance.

[0032] The combination of the two detachable connection methods gives the mechanism good modularity. If it is necessary to replace the high-ratio reducer 2 with a different speed ratio to adapt to different load conditions, the replacement can be completed simply by disassembling the spline connection with the housing. This improves the equipment's adaptability to diverse operating scenarios and reduces the cost of equipment upgrades and modifications.

[0033] like Figure 1 As shown, the reduction ratio of the high-ratio reducer 2 is 300-700, preferably 400.

[0034] In this embodiment, by setting the reduction ratio of the high-ratio reducer 2 to 400, it plays a key role in optimizing the power transmission and operational performance of the entire rotating mechanism. First, this reduction ratio can efficiently amplify the output torque of the first servo motor 3 by 400 times. Even if the output torque of the servo motor itself is relatively small, after being transmitted by the high-ratio reducer 2, it can still provide the rotating shaft 1 with a large torque sufficient to drive the fork carriage 10 and the full load, ensuring that the fork carriage 10 can still smoothly complete the rotational action when carrying 1.3-1.5 tons of goods, completely solving the problem that existing low-ratio reducers require additional gear sets to supplement torque. Second, the reduction ratio of 400 can accurately reduce the high-speed output speed of the first servo motor 3 to the low-speed range required for operation. For example, when the output speed of the servo motor is 1200 r / min, after being reduced by the high-ratio reducer 2, the speed of the rotating shaft 1 is only 3 r / min. This speed can meet the requirements of precise alignment and stacking of the fork carriage 10, and can also avoid the centrifugal shaking of goods due to excessive speed, thus improving operational safety.

[0035] like Figure 1 As shown, the support parts at both ends of the rotating shaft 1 are provided with a lubrication structure. The lubrication structure includes a grease nipple 5 provided on the side of the first mounting bearing 4, a rotating lip seal 6 and a lower baffle 7 for sealing. The rotating lip seal 6 is installed on one side of the first mounting bearing 4, and the lower baffle 7 is installed at the bottom of the first mounting bearing 4.

[0036] In this embodiment, grease can be periodically injected into the bearing via the grease nipple 5 located on the side of the first mounting bearing 4. This continuously forms a stable oil film on the contact surfaces of the bearing rolling elements and inner and outer rings, effectively reducing frictional wear of the bearing during the rotation of the rotating shaft 1. This prevents overheating or wear of the bearing due to insufficient lubrication, ensuring that the rotating shaft 1 maintains stability when driving the fork carriage 10 to rotate, and extending the service life of the first mounting bearing 4. The rotating lip seal 6 installed on one side of the first mounting bearing 4 tightly fits the bearing end face and the surface of the rotating shaft 1, forming a first sealing barrier that effectively blocks... External dust, moisture, and other impurities prevent the grease from becoming contaminated and deteriorating, while also preventing grease leakage from the bearing clearance. The double seal formed by the lower baffle 7 at the bottom of the first mounting bearing 4 and the rotating lip seal 6 further enhances the protective effect. Even under frequent forklift operation or complex working conditions, the sealing of the lubrication structure can be ensured, reducing the frequency of grease replenishment, lowering maintenance costs, and ensuring the lubrication reliability of the first mounting bearing 4. This prevents the rotating shaft 1 from jamming due to impurities or grease loss, thereby maintaining the stability and accuracy of the fork carriage 10's rotation.

[0037] like Figure 2 and Figure 3 As shown, an electric three-way fork includes a bridge 8, a drive mechanism 9, and a fork carriage 10. The bridge 8 is slidably connected to a carriage 11. The drive mechanism 9 is mounted on the bridge 8 and is used to drive the bridge 8 to move along the carriage 11. The fork carriage 10 is mounted on the bridge 8 via a rotating shaft 1.

[0038] In this embodiment, the sliding connection between the bridge 8 and the carriage 11, combined with the power output of the drive mechanism 9, allows the bridge 8 to move stably left and right along the carriage 11, enabling the fork carriage 10 to accurately align with the cargo positions on both sides of the aisle. This breaks through the limitation of traditional forklifts that can only stack in the forward direction, achieving three-way stacking functions (forward, left and right), and significantly improving the utilization rate of storage space. The fork carriage 10 is mounted on the bridge 8 via the rotating shaft 1. This connection allows the fork carriage 10 to rotate flexibly around the rotating shaft 1. Combined with the lateral movement of the bridge 8, the fork angle can be quickly adjusted to adapt to the storage and retrieval needs of goods of different specifications. Furthermore, the rigid connection between the rotating shaft 1 and the bridge 8 prevents the fork carriage 10 from loosening during lateral movement or rotation, ensuring operational stability.

[0039] like Figure 3 As shown, the cable tray 8 is equipped with an upper roller 12, a lower roller 13 and a main roller 14. The upper roller 12 and the lower roller 13 are adapted to be embedded in the raceway of the slide 11 and roll left and right along the raceway. The main roller 14 is pressed against the surface of the slide 11 and rolls left and right synchronously with the cable tray 8.

[0040] In this embodiment, the upper roller 12 and lower roller 13 are fitted into the raceway of the carriage 11 to form a guide structure that clamps the cable tray 8 vertically during sliding, which can precisely limit the vertical movement of the cable tray 8 during sliding and prevent the fork carriage 10 from shaking due to vertical displacement during lateral movement. At the same time, the constraint effect of the raceway on the rollers can ensure that the cable tray 8 moves smoothly along a straight line, and the lateral deviation is controlled within a very small range, improving the positioning accuracy. The main roller 14 is pressed against the surface of the carriage 11, and together with the upper roller 12 and lower roller 13, it supports the cable tray 8 and the fork carriage 10. The overall load of 0 is distributed across three roller groups, reducing the stress and wear on individual rollers and extending their service life. At the same time, it avoids deformation of the carriage 11 due to excessive local load, ensuring the structural stability of long-term operation. By replacing traditional sliding friction with rolling friction between the rollers and the carriage 11, the resistance during lateral movement of the bridge 8 is significantly reduced. This allows the drive mechanism 9 to output only a small amount of power to drive the bridge 8 to move quickly, improving lateral movement efficiency. Furthermore, the noise generated by rolling friction is lower, meeting the requirements of quiet operation in the storage environment.

[0041] like Figure 3 As shown, a gear shaft 15 is also installed on the bridge frame 8. Both ends of the gear shaft 15 are rotatably connected to the bridge frame 8 through the second mounting bearing 16. A drive gear 17 and a transmission gear 18 are installed on the gear shaft 15. A rack 22 that meshes with the drive gear 17 is provided on the slide 11.

[0042] In this embodiment, the gear shaft 15 meshes with the rack 22 on the carriage 11 via the drive gear 17, forming a precise gear and rack transmission pair. Compared with chain or belt drives, this avoids slippage and slack, allowing the power of the drive mechanism 9 to be efficiently transmitted to the bridge frame 8 in a 1:1 ratio. The lateral movement speed and displacement are more precisely controlled, ensuring that the fork carriage 10 can quickly align with the target position. The gear shaft 15 is rotatably connected to the bridge frame 8 at both ends via second mounting bearings 16. The second mounting bearings 16 can simultaneously withstand radial loads and slight axial loads, which reduces frictional resistance during the rotation of the gear shaft 15, reduces power loss, and ensures the coaxiality of the gear shaft 15. This prevents uneven meshing clearance between the drive gear 17 and the rack 22 due to shaft misalignment, thereby preventing lateral movement jamming or abnormal gear wear.

[0043] like Figure 3 As shown, the drive mechanism 9 includes a small speed ratio reducer 19 and a second servo motor 20. The small speed ratio reducer 19 and the second servo motor 20 are mounted on the bridge frame 8. The output end of the second servo motor 20 is connected to the input end of the small speed ratio reducer 19. The output end of the small speed ratio reducer 19 is provided with a drive gear 21, which meshes with the transmission gear 18.

[0044] In this embodiment, the combination of the second servo motor 20 and the small-ratio reducer 19 enables precise adjustment of lateral movement speed and displacement by leveraging the high-precision control characteristics of the servo motor. Simultaneously, the small-ratio reducer 19 maintains a high output speed while outputting appropriate torque. Through the meshing transmission of the drive gear 21 and the transmission gear 18, the bridge frame 8 can be driven to move laterally quickly, significantly improving cargo storage and retrieval efficiency. The meshing of the drive gear 21 at the output end of the small-ratio reducer 19 with the transmission gear 18 on the gear shaft 15 avoids installation space conflicts caused by the direct connection of the drive mechanism 9 to the rack 22. Furthermore, the rigid transmission of the gear meshing reduces power loss, allowing the power of the second servo motor 20 to be efficiently transmitted to the gear shaft 15, ensuring that the bridge frame 8 can still move laterally smoothly even under full load.

[0045] The first servo motor 3 and the second servo motor 20 both integrate drivers and brakes.

[0046] like Figure 3 As shown, the reduction ratio of the small speed ratio reducer 19 is 50-150, preferably 100; In this embodiment, the reduction ratio ensures the torque required for lateral movement while maintaining the high-efficiency speed of the second servo motor 20. For example, when the output speed of the second servo motor 20 is 1500 r / min, after being reduced by the small-ratio reducer 19, the speed of the drive gear 21 at its output end can reach 15 r / min. Then, through meshing with the transmission gear 18, it can drive the gear shaft 15 to drive the bridge frame 8 to move laterally along the slide 11 at a speed of ≥0.5 m / s. This perfectly meets the efficiency requirements of lateral movement for quick storage and retrieval of goods, avoiding the lateral movement speed being too slow due to an excessively large reduction ratio, and improving the turnover rate of warehousing operations. With a reduction ratio of 100, the output torque of the second servo motor 20 can be amplified by 100 times. Even if the output torque of the motor itself is small, it can still provide sufficient power to the drive gear 21 through the reducer, ensuring that there is no slippage when the drive gear 21 meshes with the transmission gear 18, thereby driving the bridge frame 8 and the fork carriage 10 to move laterally smoothly without the need for additional gear sets to supplement torque, simplifying the lateral movement transmission structure.

[0047] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A direct-drive rotary mechanism, characterized in that, It includes a rotating shaft (1), a high-ratio reducer (2) and a first servo motor (3). The output end of the first servo motor (3) is connected to the input end of the high-ratio reducer (2). The output end of the high-ratio reducer (2) is connected to the rotating shaft (1) to drive the rotating shaft (1) to rotate at low speed. The rotating shaft (1) is mounted on the bridge frame (8) through a first mounting bearing (4) and is connected to the fork carriage (10) to directly drive the fork carriage (10) to rotate.

2. The direct-drive rotary mechanism as described in claim 1, characterized in that, The output end of the high-ratio reducer (2) is detachably connected to the rotating shaft (1) via a spline, and the housing of the high-ratio reducer (2) is detachably connected to the bridge frame (8).

3. The direct-drive rotary mechanism as described in claim 1, characterized in that, The reduction ratio of the high-ratio reducer (2) is 300-700.

4. The direct-drive rotary mechanism as described in claim 1, characterized in that, The support parts at both ends of the rotating shaft (1) are provided with a lubrication structure, which includes a grease nipple (5) provided on the side of the first mounting bearing (4), a rotating lip seal (6) and a lower baffle (7) for sealing. The rotating lip seal (6) is installed on one side of the first mounting bearing (4), and the lower baffle (7) is installed at the bottom of the first mounting bearing (4).

5. The direct-drive rotary mechanism as described in claim 1, characterized in that, The high-ratio reducer (2) has an L-shaped structure.

6. An electric three-way fork, using the direct-drive rotary mechanism as described in any one of claims 1-5, characterized in that, It includes a cable tray (8), a drive mechanism (9) and a fork carriage (10). The cable tray (8) is slidably connected to a carriage (11). The drive mechanism (9) is mounted on the cable tray (8) and is used to drive the cable tray (8) to move along the carriage (11). The fork carriage (10) is mounted on the cable tray (8) via a rotating shaft (1).

7. The electric three-way fork as described in claim 6, characterized in that, The bridge frame (8) is equipped with an upper roller (12), a lower roller (13) and a main roller (14). The upper roller (12) and the lower roller (13) are adapted to be embedded in the raceway of the slide (11) and roll left and right along the raceway. The main roller (14) is pressed against the surface of the slide (11) and rolls left and right synchronously with the bridge frame (8).

8. The electric three-way fork as described in claim 6, characterized in that, The bridge frame (8) is also equipped with a gear shaft (15). Both ends of the gear shaft (15) are rotatably connected to the bridge frame (8) through a second mounting bearing (16). The gear shaft (15) is equipped with a drive gear (17) and a transmission gear (18). The slide (11) is provided with a rack (22) that meshes with the drive gear (17).

9. The electric three-way fork as described in claim 6, characterized in that, The drive mechanism (9) includes a small speed ratio reducer (19) and a second servo motor (20). The small speed ratio reducer (19) and the second servo motor (20) are mounted on the bridge frame (8). The output end of the second servo motor (20) is connected to the input end of the small speed ratio reducer (19). The output end of the small speed ratio reducer (19) is provided with a drive gear (21), which meshes with the transmission gear (18).

10. The electric three-way fork as described in claim 9, characterized in that, The reduction ratio of the small speed ratio reducer (19) is 50-150.

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