A direct drive type electric rotating assembly of a human upper type three-way forklift

Abstract

The application relates to the technical field of three-way forklifts, and discloses a direct-drive type electric rotating assembly of a human-up type three-way forklift, which comprises a lifting frame, a sliding frame is arranged on one side of the lifting frame in a sliding mode, a rotating frame is arranged on one side of the sliding frame in a rotating mode, a rotating motor is fixedly arranged on one side of the sliding frame, a first speed reducer is fixedly arranged on one side of the sliding frame, a lifting oil cylinder is fixedly sleeved at the bottom of the rotating frame, and a moving seat is fixedly connected to the output end of the lifting oil cylinder. In the process of inserting the forks into the tray slot, the rotating wheel is driven to move; when the posture of the forklift is inclined or the tray is placed in an inclined mode, the clutch is switched to a separated state; the rotating wheel rolls along the inner wall of the slot; the rotating angle of the forks is passively adjusted by the reaction force between the rotating wheel and the inner wall of the slot; the tray is prevented from shaking caused by the rigid contact between the forks and the tray; and the stability of the rotating assembly in the picking operation is improved.

Description

Technical Field

[0001] This application relates to the field of three-way forklift technology, and more particularly to a direct-drive electric rotary assembly for a man-mounted three-way forklift. Background Technology

[0002] A man-mounted three-way forklift attachment is a forklift attachment that enables independent rotation and lateral movement of the forks for picking up goods through a three-way drive mechanism. Existing three-way forklift attachments include a side-shift servo assembly, a lifting frame, a sliding frame, a swivel frame, and forks, along with a rotary swing cylinder assembly. The lifting frame is fixedly mounted on the forklift's lifting assembly. The sliding frame is slidably mounted on one side of the lifting frame and is driven by a hydraulic cylinder for horizontal lateral movement. The swivel frame is rotatably mounted on the sliding frame and is driven to rotate by a hydraulic motor and a reduction gear. The forks are mounted on the swivel frame via a lifting cylinder and a chain mechanism for vertical lifting. During operation, the operator drives the forklift to the shelf, first adjusting the forks to the target pallet height using the lifting assembly, then activating the hydraulic system to rotate the swivel frame by a certain angle (usually 180°) so that the forks point towards the pallet slots. Next, the side-shift cylinder pushes the sliding frame to extend horizontally, causing the forks to insert into the bottom slots of the pallet. Finally, the lifting cylinder raises the forks to lift the goods.

[0003] However, in the use of existing man-mounted three-way forklift attachments, after the forklift travels to the picking position, the forklift's direction of travel is prone to tilting relative to the rack end face. Alternatively, some pallets may be placed at an angle due to the forklift's tilted posture. Furthermore, it is difficult for operators to accurately judge the angle deviation between the forks and the slots by observing from the side. If the sliding frame is forcibly driven to move laterally to insert the forks into the pallet, the free end of the forks will rigidly contact the inner wall of the slot or the bottom of the pallet, causing the pallet to wobble. This can even cause the goods to deviate from the load center, or the pallet to move backward simultaneously. Consequently, when the forks carry goods for subsequent movement, especially during lateral movement and rotation linkage operations, the goods are prone to swaying or tipping due to the shift in the center of gravity, thus affecting the stability and safety of forklift operations. This makes it difficult to meet the requirements for flexible forklift and precise control in narrow aisle high rack scenarios. Summary of the Invention

[0004] This application proposes a direct-drive electric rotary assembly for a man-mounted three-way forklift, which has the advantages of improving the stability of pallet picking and improving the efficiency of pallet picking operations, in order to solve the problem that existing three-way forklift attachments are prone to causing goods to sway and pallet to shift when picking up pallets in an inclined posture.

[0005] To achieve the above objectives, this application adopts the following technical solution: a direct-drive electric rotary assembly for a man-mounted three-way forklift, comprising a lifting frame, a sliding frame slidably disposed on one side of the lifting frame, a rotating frame rotatably disposed on one side of the sliding frame, a rotary motor fixedly disposed on one side of the sliding frame, a reducer fixedly disposed on one side of the sliding frame, a lifting cylinder fixedly sleeved at the bottom of the rotating frame, a movable seat fixedly connected to the output end of the lifting cylinder, a sprocket rotatably disposed on the top of the movable seat, a chain being meshed and driven to the outer side of the sprocket, a connecting frame slidably connected to one side of the rotating frame, a mounting base fixedly connected to one side of the connecting frame, and two forks fixedly connected to one side of the mounting base;

[0006] It also includes an adjustment mechanism, the angle rotation range of the rotating frame is greater than °, and the adjustment mechanism can drive the forks to rotate around the rotation center of the rotating frame when the pallet is not being picked up after the forks are inserted into the slot at the bottom of the pallet.

[0007] Furthermore, two fixed racks arranged in parallel are fixedly installed on one side of the lifting frame, and a drive shaft is rotatably installed on the inner side of the sliding frame. Drive gears are fixedly sleeved near the top and bottom of the drive shaft, and the drive gears mesh with the corresponding fixed racks.

[0008] Furthermore, a side-moving motor is fixedly installed on the top of the sliding frame, and a second reducer is fixedly installed near the top of the sliding frame. The input shaft of the second reducer is fixedly connected to the output shaft of the side-moving motor, and the output shaft of the second reducer is fixedly connected to the transmission shaft.

[0009] Furthermore, the sliding frame is rotatably equipped with several horizontal guide wheels and longitudinal support wheels on the side near the lifting frame. The horizontal guide wheels are engaged with the lifting frame in a rolling manner, and the longitudinal support wheels are in contact with the bottom fixed rack of the two fixed racks.

[0010] Furthermore, both the first and second reducers are RV reducers, and both the lateral motor and the rotary motor are servo motors. The input end of the first reducer is fixedly connected to the output end of the rotary motor. One end of the chain is fixedly connected to the frame near the bottom of the rotating frame, and the other end of the chain is fixedly connected to the connecting frame.

[0011] Furthermore, the adjustment mechanism includes a rotating wheel, which is rotatably connected to the forks. A clutch is fixedly installed at the bottom of the rotating frame. The driving end of the clutch is fixedly connected to the output end of the first reducer, and the driven end of the clutch is fixedly connected to the rotating frame. An angle sensor is installed on the top of the first reducer, and the angle sensor is used to detect the rotation angle of the rotating frame relative to the first reducer.

[0012] Furthermore, a sliding block is slidably engaged on one side of the fork. The sliding block is T-shaped, and a contact wheel is rotatably connected to one side of the sliding block. A pressure sensor is fixedly installed on one side of the fork, and a pressure mechanism is installed on one side of the fork. The pressure mechanism is used to drive the sliding block to extend towards the fork and to retract the sliding block into the fork. The two sliding blocks extend in opposite directions.

[0013] Furthermore, the pressure mechanism includes a spring and a drive mechanism. One end of the spring is fixedly connected to a pressure sensor, and the other end of the spring is fixedly connected to a sliding block. The drive mechanism includes an adjusting gear. A transmission rack is slidably arranged on one side of the fork. A limit rod is fixedly connected to the top of the transmission rack. An active rack is slidably arranged on one side of the fork. A transmission rod is fixedly connected to one side of the active rack. A connecting rod is fixedly connected to one end of the two transmission rods.

[0014] Furthermore, the adjusting gear is rotatably connected to the corresponding fork, the transmission rack and the drive rack are both meshed with the adjusting gear, the transmission rod is slidably sleeved with the fork, and an electric push rod is fixedly connected to one side of the bottom of the mounting base, the output end of the electric push rod is connected to the connecting rod in a transmission manner.

[0015] Furthermore, each of the forks has two sliding blocks and two pressure mechanisms, with the two sliding blocks positioned near both ends of the fork.

[0016] The beneficial effects of this invention are as follows:

[0017] This application provides a direct-drive electric rotary assembly for a man-mounted three-way forklift. During the insertion of the forks into the pallet slot, the rotary wheel moves. When the clutch is disengaged, if the forklift's travel posture deviates or the pallet is tilted, the rotary wheel rolls along the inner wall of the slot. The reaction force between the rotary wheel and the slot wall passively adjusts the fork's rotation angle. This reduces the angle between the fork's extension direction and the slot's extension direction while inserting the fork without picking up the pallet, preventing pallet wobbling caused by rigid fork contact and avoiding excessive deviation of goods from the load center, which could lead to tipping during subsequent movement or rotation. Furthermore, the small transmission clearance structure of the servo motor and RV reducer enhances the stability of the rotary assembly's forklift operation while ensuring transmission accuracy. This makes it suitable for situations where the fork and slot orientation is difficult to judge due to limited viewing angles in narrow aisle high-rack environments.

[0018] Furthermore, through the cooperation of a sliding block, contact wheels, springs, pressure sensors, and a drive mechanism including a limit rod and a gear rack assembly, after the forks are inserted into the pallet, the limit rod is controlled by an electric push rod to release the constraint on the sliding block. This allows one or more contact wheels to actively abut against the inner wall of the slot under the action of spring force. The pressure difference detected by the two pressure sensors at corresponding positions determines the direction and degree of offset of the fork end relative to the center of the pallet, thereby guiding the operator to fine-tune the forklift forward or backward until the pressure difference is within the rated range. This ensures that the extension direction of the forks is precisely parallel and centered with the direction of the pallet slot without moving the pallet, avoiding the risk of uneven load and tipping caused by controlling the fork lifting assembly with only a side view in the traditional method, and further improving the stability of the rotating assembly in lifting the pallet. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0020] Figure 1 This is a schematic diagram of the structure of the moving and rotating component of the present invention;

[0021] Figure 2 This is a schematic diagram of the rotating frame part of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the lifting cylinder of the present invention;

[0023] Figure 4 This is a schematic diagram of the clutch structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the fork structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the electric actuator of the present invention;

[0026] Figure 7 This is a schematic cross-sectional view of the structure at the adjusting gear of the present invention;

[0027] Figure 8 This is a schematic cross-sectional view of the structure at the pressure application component of the present invention;

[0028] Figure 9 This is a schematic diagram illustrating the arrangement of multiple pressure sensors according to the present invention.

[0029] In the diagram: 1. Rotary motor; 2. Reducer No. 1; 3. Connecting frame; 4. Rotating frame; 5. Mounting base; 6. Lifting cylinder; 7. Moving base; 8. Sprocket; 9. Side-shifting motor; 10. Reducer No. 2; 11. Transmission gear; 12. Fixed rack; 13. Lifting frame; 14. Transmission shaft; 15. Sliding frame; 16. Moving frame; 17. Fork; 18. Rotating wheel; 19. Sliding block; 20. Contact wheel; 21. Pressure sensor; 22. Spring; 23. Adjusting gear; 24. Transmission rack; 25. Driving rack; 26. Limit rod; 27. Transmission rod; 28. Electric push rod; 29. ​​Connecting rod; 30. Angle sensor; 31. Clutch. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1, as Figures 1-6 A direct-drive electric rotary assembly for a man-mounted three-way forklift includes a lifting frame 13, which is fixedly mounted on the lifting assembly of the man-mounted three-way forklift. Two fixed racks 12 arranged in parallel are fixedly arranged on one side of the lifting frame 13. The two fixed racks 12 are respectively arranged near the top and bottom of the lifting frame 13. A sliding frame 15 is slidably arranged on one side of the lifting frame 13. The sliding frame 15 can move horizontally relative to the sliding frame 13 in the extension direction of the fixed racks 12 without disengaging from the lifting frame 13. A drive shaft 14 is rotatably arranged on the inner side of the sliding frame 15. A drive gear 11 is fixedly sleeved near the top and bottom of the shaft of the drive shaft 14. The drive gear 11 meshes with the corresponding fixed rack 12.

[0032] A lateral motor 9 for driving the transmission shaft 14 to rotate is fixedly installed on the top of the sliding frame 15. The lateral motor 9 is a servo motor. A second reducer 10 is fixedly installed near the top of the sliding frame 15. The input shaft of the second reducer 10 is fixedly connected to the output shaft of the lateral motor 9. The output shaft of the second reducer 10 is fixedly connected to the transmission shaft 14. Preferably, a horizontal guide wheel and a longitudinal support wheel are rotatably installed on the side of the sliding frame 15 near the lifting frame 13. Specifically, the number of horizontal guide wheels is set to several and symmetrically arranged on the top and bottom of the lifting frame 13. The horizontal guide wheels are engaged with the lifting frame 13 in a rolling manner. The number of longitudinal support wheels is set to several. The longitudinal support wheel contacts the bottom fixed rack 12 of the two fixed racks 12. The longitudinal support wheel is located at the top of the corresponding fixed rack 12.

[0033] The horizontal guide wheel and the longitudinal support wheel cooperate to reduce the contact wear when the sliding frame 15 slides relative to the lifting frame 13. A rotating frame 4 is rotatably provided on one side of the sliding frame 15. A rotary motor 1 is fixedly provided on one side of the sliding frame 15. A first reducer 2 is fixedly provided on one side of the sliding frame 15. Preferably, both the first reducer 2 and the second reducer 10 are RV reducers. The rotary motor 1 is a servo motor. The input end of the first reducer 2 is fixedly connected to the output end of the rotary motor 1. The first reducer 2 is used to drive the rotating frame 4 to rotate. A lifting cylinder 6 is fixedly sleeved at the bottom of the rotating frame 4. A moving seat 7 is fixedly connected to the output end of the lifting cylinder 6. A sprocket 8 is rotatably provided on the top of the moving seat 7. The lifting cylinder 6 is used to drive the moving seat 7 to move vertically. A connecting frame 3 is slidably connected to one side of the rotating frame 4. The connecting frame 3 can move vertically without disengaging from the rotating frame 4. A chain is connected to the outer side of the sprocket 8 in a meshing manner.

[0034] One end of the chain is fixedly connected to the frame near the bottom of the rotating frame 4, and the other end of the chain is fixedly connected to the connecting frame 3. The sprocket 8 moves upward to cooperate with the chain to lift the connecting frame 3, thereby adjusting the height of the connecting frame 3. (See reference...) Figure 4 A clutch 31 is fixedly installed at the bottom of the rotating frame 4. The driving end of the clutch 31 is fixedly connected to the output end of the first reducer 2, and the driven end of the clutch 31 is fixedly connected to the rotating frame 4. An angle sensor 30 is installed on the top of the first reducer 2. The angle sensor 30 is used to detect the rotation angle of the rotating frame 4 relative to the first reducer 2 and feeds the detection result back to the PLC controller. A mounting base 5 is fixedly connected to one side of the connecting frame 3. (See reference...) Figure 5 Two forks 17 are fixedly connected to one side of the mounting base 5.

[0035] A rotating wheel 18 is rotatably connected to one side of the fork 17. The diameter of the rotating wheel 18 is larger than the horizontal width of the fork 17. The fork 17 can drive the rotating wheel 18 to extend into the slot at the bottom of the pallet to be picked up. The rotation range of the rotating frame 4 is greater than 180°. After the rotating frame 4 rotates until the extension direction of the fork 17 is parallel to the extension direction of the fixed rack 12, it can rotate further to make the free end of the fork 17 rotate around the rotation center to move closer to or away from the sliding frame 15. This is used to adjust the angle within a certain range when the extension direction of the fork 17 is tilted to the extension direction of the pallet slot.

[0036] During operation, the lifting frame 13 is moved to the side of the shelf at the height corresponding to the pallet to be picked up by the forks via the lifting assembly. The PLC controller controls the rotary motor 1, which, together with the first reducer 2 and the clutch 31, drives the rotary frame 4 to rotate. At the same time, the side-shifting motor 9, together with the second reducer 10, drives the transmission shaft 14 to rotate. The rotation of the transmission shaft 14 drives the transmission gear 11 to rotate relative to the corresponding fixed rack 12, thereby driving the sliding frame 15 to move horizontally and change the position of the rotary frame 4. With the rotation of the rotary frame 4, the forks 17 can be turned within a small space. Specifically, the rotation of the rotary frame 4 drives the connecting frame 3 to rotate, the connecting frame 3 drives the mounting base 5 to rotate, and the mounting base 5 drives the forks 17 to rotate, so that the extension direction of the forks 17 is parallel to the horizontal movement direction of the sliding frame 15.

[0037] The lifting cylinder 6 adjusts the extension length, which drives the moving seat 7 to move. The moving seat 7 drives the sprocket 8 to move vertically, and the chain adjusts the position of the rotating frame 4, thereby adjusting the up and down stroke of the forks 17 so that the height of the forks 17 matches the height of the pallet slot. The side-shifting motor 9, in conjunction with the second reducer 10, drives the sliding frame 15 to move closer to the pallet to be picked up by the forks. The sliding frame 15 drives the forks 17 to move horizontally until the forks 17 drive the rotating wheel 18 to extend into the pallet slot. At this time, the side-shifting motor 9 is turned off and the clutch 31 is switched to the disengaged state.

[0038] When the forklift's posture deviates, meaning its travel direction is tilted relative to the end face of the rack, the extension direction of the fixed rack 12 on the lifting frame 13 becomes tilted relative to the normal direction of the pallet slot's end face near the forklift. Alternatively, the pallet may be placed at an angle due to the forklift's tilt. Unlike one-way forklifts, where the operator is positioned to the side of the forks 17 during the forking operation, it is difficult to determine whether the extension direction of the forks 17 aligns with the potentially tilted extension direction of the pallet slot, easily leading to excessively large tilt angles. At this time, the sliding frame 15 moves, causing the freely rotating frame 4 to continue moving closer to the pallet containing the goods. The rotating frame 4, together with the connecting frame 3 and the mounting base 5, causes the fork 17 to continue to penetrate deeper into the slot. The fork 17 causes the rotating wheel 18 to move in an inclined direction relative to the extension of the slot, so that the side of the rotating wheel 18 contacts the inner wall of the slot. The inner wall of the slot restricts the movement of the rotating wheel 18 in the inclined direction, causing the rotating wheel 18 to roll along the inner wall of the slot and extend in. The reaction force between the rotating wheel 18 and the inner wall of the slot causes the fork 17 to rotate around the rotation center.

[0039] Thus, even without forking the pallet, within a certain range, the rotation angle of the forks 17 is passively adjusted while the forks 17 are inserting, so that the forks 17 are inserted into the bottom of the pallet. This avoids the pallet wobbling caused by the rigid contact of the forks 17 with the pallet, which could lead to incomplete forking and possible deviation of the goods or pallet from the load-bearing center position. This would affect the subsequent movement of the forks, especially the shaking of the goods during the rotation of the forks 17, which could cause the goods to tip over. This improves the stability of the rotating component in picking up the pallet with the forks. After the forks 17 are inserted into the pallet slot, the clutch 31 switches to the engaged state, and the lifting cylinder 6 lifts the forks 17 to complete the picking up of the pallet loaded with goods. The small transmission clearance of the servo motor and RV reducer further ensures the reliability of the rotating component.

[0040] Example 2, as Figures 4-8 Based on Embodiment 1, a sliding block 19 is slidably engaged on one side of the fork 17. The sliding block 19 is T-shaped and can slide in the width direction of the fork 17 without disengaging from the fork 17. A contact wheel 20 is rotatably connected to one side of the sliding block 19. A pressure sensor 21 is fixedly installed on one side of the fork 17. A pressure mechanism is provided on one side of the fork 17. The pressure mechanism includes a spring 22 and a drive mechanism disposed between the pressure sensor 21 and the sliding block 19. One end of the spring 22 is fixedly connected to the pressure sensor 21, and the other end of the spring 22 is fixedly connected to the sliding block 19, which is used to push the sliding block 19 to extend outward from the fork 17. The drive mechanism includes an adjusting gear 23, which is rotatably connected to the corresponding fork 17. A transmission rack 24 is slidably installed on one side of the fork 17, and the moving direction of the transmission rack 24 is adapted to the moving direction of the sliding block 19.

[0041] A limiting rod 26 is fixedly connected to the top of the transmission rack 24. The limiting rod 26 is located at the top of the thinner part of the sliding block 19 and contacts the T-shaped part of the sliding block 19 to limit the extension of the sliding block 19. A drive rack 25 is slidably arranged on one side of the fork 17. The movement direction of the drive rack 25 is perpendicular to the movement direction of the transmission rack 24. Both the transmission rack 24 and the drive rack 25 mesh with the adjusting gear 23. A transmission rod 27 is fixedly connected to one side of the drive rack 25. The transmission rod 27 is slidably sleeved with the fork 17. One end of the transmission rod 27 extends out of the fork 17. A connecting rod is fixedly connected to one end of the two transmission rods 27. 29. An electric push rod 28 is fixedly connected to one side of the bottom of the mounting base 5. The output end of the electric push rod 28 is connected to the connecting rod 29 for transmission. The drive mechanism is used to cooperate with the spring 22 to drive the sliding block 19 to extend outward toward the fork 17 and to drive the sliding block 19 to retract inward toward the fork 17. The two sliding blocks 19 extend in opposite directions. Therefore, the drive mechanism can also be set as a magnetic component, such as a permanent magnet or an electromagnet assembly. The electromagnet is installed on one side of the pressure sensor 21, and the permanent magnet is installed on one side of the sliding block 19. When needed, the attraction between the electromagnet and the permanent magnet overcomes the elastic force of the spring 22 to drive the sliding block 19 to retract.

[0042] When the forks 17 have finished extending into the pallet slot and the clutch 31 remains disengaged, the electric push rod 28 extends, causing the connecting rod 29 to move closer to the forks 17. The movement of the connecting rod 29 moves the transmission rod 27, which in turn moves the drive rack 25. The drive rack 25 then rotates the adjusting gear 23, which in turn moves the transmission rack 24. The movement of the transmission rack 24 moves the limit rod 26, removing the movement limit on the sliding block 19. Under the elastic force of the spring 22, the sliding block 19 extends from the side wall of the forks 17. The moving contact wheel 20 moves to abut the inner wall of the pallet slot. The reaction force of the two contact wheels 20 contacting the pallet drives the fork 17 to rotate around the rotation center within the moving range. The pressure sensor 21 detects the corresponding side and feeds it back to the processor. When the difference in the detected pressure values ​​of the two pressure sensors 21 is greater than the rated range, the processor determines that the fork 17 is in a tilted state. That is, the end of the fork 17 on the side with the larger feedback value of the pressure sensor 21 is close to the outer wall of the corresponding side of the pallet, and the end of the fork 17 on the side with the smaller feedback value of the pressure sensor 21 is away from the outer wall of the corresponding side of the pallet.

[0043] At this time, the horizontal position of the rotating frame, which is the center of rotation of the fork 17, does not correspond to the horizontal position of the center line of the pallet. The operator controls the forklift to move forward or backward according to the feedback results and the observed offset results, and fine-tunes the movement position of the forklift until the difference between the two pressure sensors 21 is within the rated range. At this time, the end of the fork 17 swings to a position close to the center of the pallet after being corrected by the reaction force of the spring 22, so that the extension direction of the fork 17 is approximately parallel to the extension direction of the pallet slot. This ensures that the position of the fork 17 is centered relative to the pallet without moving the pallet, further improving the stability of the fork 17 picking up the pallet. Then, the clutch 31 switches to the engaged state, the electric push rod 28 retracts, and the transmission drives the limit rod 26 to move and reset, thereby driving the sliding block 19 to move and reset.

[0044] Example 3, see Figure 9 Based on Embodiment 2, the number of sliding blocks 19 and pressure mechanisms corresponding to a single fork 17 is set to two, and the two corresponding transmission rods 27 are fixedly connected. The two sliding blocks 19 are arranged near the two ends of the fork 17. When the difference between the two pressure sensors 21 at the corresponding positions of the two forks 17 is within the rated range, it can be considered that the fork 17 is in an approximately centered state relative to the pallet, which further improves the detection accuracy and improves the reliability and stability of the rotating component.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A direct-drive electric rotary assembly for a man-mounted three-way forklift, comprising a lifting frame (13), wherein a sliding frame (15) is slidably disposed on one side of the lifting frame (13), characterized in that, A rotating frame (4) is rotatably mounted on one side of the sliding frame (15). A rotary motor (1) is fixedly mounted on one side of the sliding frame (15). A reducer (2) is fixedly mounted on one side of the sliding frame (15). A lifting cylinder (6) is fixedly sleeved at the bottom of the rotating frame (4). A movable seat (7) is fixedly connected to the output end of the lifting cylinder (6). A sprocket (8) is rotatably mounted on the top of the movable seat (7). A chain is connected to the outer side of the sprocket (8) in a meshing manner. A connecting frame (3) is slidably connected to one side of the rotating frame (4). A mounting seat (5) is fixedly connected to one side of the connecting frame (3). Two forks (17) are fixedly connected to one side of the mounting seat (5). It also includes an adjustment mechanism, the rotation range of the rotating frame (4) is greater than 180°, and the adjustment mechanism can drive the forks (17) to rotate around the rotation center of the rotating frame (4) when the pallet is not picked up after the forks (17) are partially inserted into the bottom slot of the pallet.

2. The direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 1, characterized in that, Two fixed racks (12) arranged in parallel are fixedly installed on one side of the lifting frame (13). A transmission shaft (14) is rotatably installed on the inner side of the sliding frame (15). A transmission gear (11) is fixedly sleeved near the top and bottom of the shaft of the transmission shaft (14). The transmission gear (11) meshes with the corresponding fixed rack (12).

3. The direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 1, characterized in that, A side-moving motor (9) is fixedly installed on the top of the sliding frame (15), and a second reducer (10) is fixedly installed near the top of the sliding frame (15). The input shaft of the second reducer (10) is fixedly connected to the output shaft of the side-moving motor (9), and the output shaft of the second reducer (10) is fixedly connected to the transmission shaft (14).

4. The direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 1, characterized in that, The sliding frame (15) is rotatably equipped with several horizontal guide wheels and longitudinal support wheels on the side near the lifting frame (13). The horizontal guide wheels are engaged with the lifting frame (13) in a rolling manner, and the longitudinal support wheels are in contact with the bottom fixed rack (12) of the two fixed racks (12).

5. A direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 3, characterized in that, The first reducer (2) and the second reducer (10) are both RV reducers. The side-moving motor (9) and the rotary motor (1) are both servo motors. The input end of the first reducer (2) is fixedly connected to the output end of the rotary motor (1). One end of the chain is fixedly connected to the frame near the bottom of the rotating frame (4). The other end of the chain is fixedly connected to the connecting frame (3).

6. The direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 1, characterized in that, The adjustment mechanism includes a rotating wheel (18), which is rotatably connected to the forks (17). A clutch (31) is fixedly installed at the bottom of the rotating frame (4). The active end of the clutch (31) is fixedly connected to the output end of the first reducer (2), and the passive end of the clutch (31) is fixedly connected to the rotating frame (4). An angle sensor (30) is installed on the top of the first reducer (2). The angle sensor (30) is used to detect the rotation angle of the rotating frame (4) relative to the first reducer (2).

7. A direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 6, characterized in that, A sliding block (19) is slidably engaged on one side of the fork (17). The sliding block (19) is T-shaped. A contact wheel (20) is rotatably connected to one side of the sliding block (19). A pressure sensor (21) is fixedly installed on one side of the fork (17). A pressure mechanism is installed on one side of the fork (17). The pressure mechanism is used to drive the sliding block (19) to extend towards the fork (17) and to retract the sliding block (19) into the fork (17). The two sliding blocks (19) extend in opposite directions.

8. A direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 7, characterized in that, The pressure mechanism includes a spring (22) and a drive mechanism. One end of the spring (22) is fixedly connected to a pressure sensor (21), and the other end of the spring (22) is fixedly connected to a sliding block (19). The drive mechanism includes an adjusting gear (23). A transmission rack (24) is slidably arranged on one side of the fork (17). A limit rod (26) is fixedly connected to the top of the transmission rack (24). An active rack (25) is slidably arranged on one side of the fork (17). A transmission rod (27) is fixedly connected to one side of the active rack (25). A connecting rod (29) is fixedly connected to one end of the two transmission rods (27).

9. A direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 8, characterized in that, The adjusting gear (23) is rotatably connected to the corresponding fork (17). The transmission rack (24) and the driving rack (25) are both meshed with the adjusting gear (23). The transmission rod (27) is slidably sleeved with the fork (17). An electric push rod (28) is fixedly connected to one side of the bottom of the mounting base (5). The output end of the electric push rod (28) is connected to the connecting rod (29) in a transmission connection.

10. A direct-drive electric rotary assembly for a man-mounted three-way forklift according to claim 7, characterized in that, The number of sliding blocks (19) and pressure mechanisms corresponding to a single fork (17) is set to two, and the two sliding blocks (19) are arranged near the two ends of the fork (17).

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