A gravity center rearward moving structure for a fork lifting and carrying AGV

Abstract

The application provides a gravity center rear-moving structure for a fork-lifting carrying AGV, which comprises a fixed frame and a box body movable along the AGV in front and back directions, the fixed frame is provided with guide cylinders at both ends, the box body is provided with a front-extending connecting arm, the connecting arm is in sliding sleeve connection with the guide cylinders, the front end of the connecting arm is used for being hingedly connected with the rear end of a front fork, a counterweight is arranged at the rear end in the box body, a leaning frame connected with the fixed frame is further arranged, the lower end of the leaning frame is provided with a guide sleeve, and the front fork is in sliding sleeve connection with the guide sleeve, so that the problems of high gravity center and front inclination of the fork-lifting integrated AGV are solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical maintenance, and in particular to a rearward-shifting structure for a forklift-operated AGV. Background Technology

[0002] Forklifts are a common type of ground handling vehicle in factories. As the integration of electrical cabinets increases, the height of electrical cabinets in power plants gradually increases, and the center of gravity also rises accordingly. When using the forklift to lift the electrical cabinet, it may cause it to tip over. Therefore, in recent years, a forklift-lifting integrated AGV has been developed to replace the forklift for lifting electrical cabinets with a high center of gravity.

[0003] The prior art invention patent application with application number 202010586306.5 has proposed a lifting truck boom structure, which is an improvement on the existing general-purpose lifting forklift. Through the mast, boom, fork tooth device and base, it can complete the whole process of "unpacking-lifting-installation" of cabinet high-power frequency converter on the same operating tool without the need for a crane to lift.

[0004] These types of AGVs with integrated forklifts and cranes have a raised and forward-biased center of gravity due to the integrated lifting device at the top front end. This makes them prone to tilting forward when lifting tall electrical cabinets. Therefore, some AGVs require extended forks with rollers at their tips for ground support. However, electrical cabinets are usually not placed on pallets and lack pre-drilled forklift entry holes. This causes the forks to easily interfere with the cabinet, making it difficult for the AGV to reach the intended depth and for the lifting device to reach the top of the cabinet. Utility Model Content

[0005] This invention provides a rearward-shifting center of gravity structure for forklift-lift AGVs, solving the problem of high and forward-biased center of gravity, which makes them prone to tilting forward in integrated forklift-lift AGVs.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rearward shift structure for forklift transport of AGV, including a fixed frame and a box that can move back and forth along the AGV. The fixed frame is provided with guide cylinders at both ends, and the box is provided with a forward-extending connecting arm. The connecting arm is slidably sleeved with the guide cylinder. The front end of the connecting arm is used to hinge with the rear end of the front fork. The rear end of the box is provided with a counterweight block and a support frame connected to the fixed frame. The lower end of the support frame is provided with a guide sleeve, and the front fork is slidably sleeved with the guide sleeve.

[0007] In a preferred embodiment, the rear end of the fixing frame has a column hole, a slidable pin is provided in the column hole, and an inclined channel is provided in the pin. The rear end of the fixing frame also has a movable inner pull rod. The end of the inner pull rod near the pin is provided with a thin rod part, and the end of the thin rod part is provided with a rotatable abutment roller. The abutment roller rolls against the upper and lower inclined walls of the inclined channel. The guide sleeve and guide cylinder are provided with pin holes. The inner pull rod moves so that the upper end of the pin is inserted into or pulled out of the pin hole.

[0008] In a preferred embodiment, the connecting arm may be provided with a slidable rear pull rod. The front end of the rear pull rod is used to connect with the inner pull rod, and the rear end of the connecting arm is provided with a rotatable nut. The rear end of the rear pull rod is threadedly connected to the nut. A pin-triggered motor is provided inside the housing. The shaft end of the pin-triggered motor and the outer wall of each nut are fitted with transmission wheels. The transmission wheels of the pin-triggered motor and the transmission wheels of the nut are driven by a transmission belt.

[0009] In the preferred embodiment, the front end of the rear tie rod is provided with an annular groove, the rear end of the inner tie rod is provided with a constriction neck, the constriction neck is inserted into the annular groove, the inner diameter of the constriction neck is larger than the outer diameter of the bottom wall of the annular groove, the annular groove is provided with a side stop, the inner diameter of the constriction neck is smaller than the outer diameter of the side stop, and the width of the annular groove is larger than the thickness of the constriction neck.

[0010] In the preferred embodiment, the front end of the rear tie rod is provided with a threaded adjusting rod, the front end of the adjusting rod is provided with a convex ring, and the front end of the adjusting rod is provided with a stop screw, the convex ring and the stop screw forming an annular groove.

[0011] In the preferred embodiment, a flexible retaining ring is fitted on the inner side of the neck.

[0012] In the preferred embodiment, a rotatable support roller is provided at the lower rear side of the box, and the lowest point of the support roller is higher than the ground when the box is retracted.

[0013] In the preferred embodiment, the rear end of the fixing frame is provided with a rear bracket, and the rear end of the box is provided with a shelf, the rear bracket being used to support the shelf.

[0014] In the preferred embodiment, a linear drive cylinder is provided on the fixed frame, which drives the housing to move back and forth.

[0015] In the preferred embodiment, the two ends of the linear drive cylinder are hinged to the fixed frame and the housing, respectively.

[0016] The beneficial effects of this utility model are as follows: A movable box body with a counterweight is used, and the counterweight is placed at the rear end of the box body, causing the AGV's center of gravity to shift downwards and backwards; when the box body moves backwards, it drives the front fork to retract, allowing the AGV to get closer to the electrical cabinet, facilitating the lifting device to reach directly above the electrical cabinet; the front fork integrates a locking pin mechanism, which can lock the support frame when the front fork participates in insertion / removal to prevent it from shifting backwards due to the pressure from the electrical cabinet; when the box body with the counterweight extends backwards, it can lock the box body and the fixed frame, making the connection more reliable and stable, and preventing the box body from falling out; a single drive motor can synchronously drive the two side pin columns, saving hardware costs; the connecting arm and the front fork are hinged, allowing the front fork to swing up and down, facilitating fork entry and tilting, while also allowing the box body to stand upright on the ground after extension, preventing the box body structural components from bending and deforming. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a rear structural diagram of the present invention.

[0019] Figure 2 This is a front structural diagram of the present invention.

[0020] Figure 3 This is a diagram showing the bracket after it has been concealed.

[0021] Figure 4 This is a schematic diagram of a pin-locked bracket.

[0022] Figure 5 This is an enlarged view of the pin post.

[0023] Figure 6 This is a diagram illustrating the fork lowering and entering the fork position.

[0024] Figure 7 This is a schematic diagram of the box extending backward and tilting downward.

[0025] Figure 8 This is a schematic diagram of the floating connection between the adjusting rod and the inner tie rod.

[0026] Figure 9 This is a structural diagram of the fixed frame.

[0027] In the diagram: 1. Fixed frame; 101. Guide cylinder; 102. Rear bracket; 103. Column hole; 2. Housing; 201. Connecting arm; 202. Shelf; 203. Support roller; 3. Front fork; 4. Counterweight; 5. Backrest; 501. Guide sleeve; 6. Pin post; 601. Inclined groove; 602. Inner tie rod; 603. Thin rod part; 604. Abutment roller; 605. Pin hole; 606. Adjusting rod; 607. Rear tie rod; 608. Nut; 609. Drive wheel; 610. Pin trigger motor; 611. Drive belt; 612. Annular groove; 613. Neck; 614. Side stop; 615. Protruding ring; 616. Stop screw; 617. Flexible retaining ring; 7. Linear drive cylinder. Detailed Implementation

[0028] like Figure 1-9 In this invention, a rearward-shifting center of gravity structure for forklift transport of AGV includes a fixed frame 1 and a box 2 that can move back and forth along the AGV. The fixed frame 1 has guide cylinders 101 at both ends. The box 2 has a forward-extending connecting arm 201 that is slidably sleeved with the guide cylinder 101. The front end of the connecting arm 201 is used to hinge with the rear end of the front fork 3. The rear end of the box 2 has a counterweight block 4 and a support frame 5 connected to the fixed frame 1. The lower end of the support frame 5 has a guide sleeve 501 that is slidably sleeved with the front fork 3.

[0029] The mounting bracket 1 is connected and fixed to the AGV frame. A lifting device can be installed on the top of the AGV frame, which extends forward past the upper end of the support bracket 5 to perform lifting operations.

[0030] Initially, the hinge position of the fork 3 and the connecting arm 201 is located in the gap between the guide sleeve 501 and the guide cylinder 101. Therefore, if the backrest 5 is rotatably connected to the fixed frame 1, the backrest 5 and the fork 3 can swing as a whole relative to the fixed frame 1. However, the housing 2 is inserted into the guide cylinder 101 of the fixed frame 1 by the connecting arm 201. Therefore, the housing 2 will not swing with the fork 3 and the backrest 5. The housing 2 can only move back and forth relative to the fixed frame 1.

[0031] Since the forks of forklifts or forklift-crane trucks generally need to be able to tilt to prevent the goods being lifted from tipping forward, under the premise of ensuring this, the box 2 can carry the counterweight 4 and move it backward to shift the overall center of gravity of the AGV to the rear, thereby preventing the AGV from tipping forward and causing danger.

[0032] In a preferred embodiment, the rear end of the fixing frame 1 is provided with a column hole 103, and a slidable pin 6 is provided in the column hole 103. The pin 6 is provided with an inclined channel 601. The rear end of the fixing frame 1 is also provided with a movable inner pull rod 602. The end of the inner pull rod 602 near the pin 6 is provided with a thin rod part 603. The end of the thin rod part 603 is provided with a rotatable abutment roller 604. The abutment roller 604 rolls against the upper and lower inclined walls of the inclined channel 601. The guide sleeve 501 and the guide cylinder 101 are provided with pin holes 605. The inner pull rod 602 moves so that the upper end of the pin 6 is inserted into or pulled out of the pin hole 605.

[0033] Taking the upper and lower inclined walls of the inclined channel 601 as an example, when the inner pull rod 602 is pulled back, it presses against the roller 604 to compress the lower inclined wall, causing the pin 6 to move downwards and be pulled out of the pin hole 605. The guide sleeve 501 and the front fork 3 can then move relative to each other. When the inner pull rod 602 is pushed forward, it presses against the roller 604 to compress the upper inclined wall, causing the pin 6 to move upwards and be inserted into the pin hole 605, locking the guide sleeve 501 and the front fork 3. This prevents the goods from pressing against the support frame 5 and causing it to shift when the fork is raised and the front fork 3 tilts forward.

[0034] In a preferred embodiment, the connecting arm 201 may be provided with a slidable rear pull rod 607. The front end of the rear pull rod 607 is used to connect with the inner pull rod 602. The rear end of the connecting arm 201 is provided with a rotatable nut 608. The rear end of the rear pull rod 607 is threadedly connected to the nut 608. The housing 2 is provided with a pin-triggered motor 610. The shaft end of the pin-triggered motor 610 and the outer wall of each nut 608 are fitted with transmission wheels 609. The transmission wheels 609 of the pin-triggered motor 610 and the transmission wheels 609 of the nut 608 are connected by a transmission belt 611.

[0035] The drive pulley 609 can be a synchronous pulley, and the drive belt 611 can be a synchronous belt.

[0036] The pin-triggered motor 610 has two transmission wheels 609 on its shaft end. A single pin-triggered motor 610 can drive two rear pull rods 607 to rotate synchronously.

[0037] In a preferred embodiment, the front end of the rear tie rod 607 is provided with an annular groove 612, and the rear end of the inner tie rod 602 is provided with a constricting neck 613. The constricting neck 613 is inserted into the annular groove 612. The inner diameter of the constricting neck 613 is larger than the outer diameter of the bottom wall of the annular groove 612. The annular groove 612 is provided with a side stop 614. The inner diameter of the constricting neck 613 is smaller than the outer diameter of the side stop 614. The width of the annular groove 612 is larger than the thickness of the constricting neck 613.

[0038] When the fork 3 swings relative to the connecting arm 201, the gap between the annular groove 612 and the neck 613 allows the adjusting rod 606 to swing relative to the inner tie rod 602.

[0039] When the rear lever 607 rotates, the two side stops 614 form front and rear limits on the neck 613, which are used to push or pull the inner lever 602 to lock or unlock the pin 6.

[0040] In a preferred embodiment, the front end of the rear tie rod 607 is provided with a threaded adjusting rod 606, the front end of the adjusting rod 606 is provided with a convex ring portion 615, and the front end of the adjusting rod 606 is provided with a stop screw 616. The convex ring portion 615 and the stop screw 616 form an annular groove 612.

[0041] The adjusting rod 606 is coated with thread-locking adhesive and has a lock nut. The extension length is adjusted so that the neck 613 is initially in the center of the annular groove 612. After adjustment, the lock nut is locked. After the adhesive solidifies, it can prevent the adjusting rod 606 from loosening.

[0042] In the preferred embodiment, a flexible retaining ring 617 is fitted inside the neck 613.

[0043] The flexible retaining ring 617 can be made of rubber and can be compressed and deformed. When the inner pull rod 602 and the adjusting rod 606 are rotated to the limit position, the flexible retaining ring 617 is squeezed to prevent damage caused by direct collision.

[0044] In the preferred embodiment, a rotatable support roller 203 is provided at the lower rear side of the housing 2, and the lowest point of the support roller 203 is higher than the ground when the housing 2 is retracted.

[0045] When the housing 2 is retracted, the bottom of the support roller 203 is slightly higher than the ground, which can prevent the support roller 203 from contacting the ground in the normal state and affecting the AGV's driving and steering.

[0046] As the housing 2 moves backward, the fork 3 gradually retracts towards the rear end of the guide sleeve 501 and enters the guide cylinder 101. When the hinge between the rear end of the fixed frame 1 and the connecting arm 201 is exposed from the rear end of the guide cylinder 101, the connecting arm 201 loses support and the rear end drops. It can continue to move backward by relying on the support roller 203 to support the ground.

[0047] In the preferred embodiment, the rear end of the fixing frame 1 is provided with a rear bracket 102, and the rear end of the box body 2 is provided with a shelf 202. The rear bracket 102 is used to support the shelf 202.

[0048] The front end of the box 2 is slidably connected to the fixed frame 1 via the guide cylinder 101. However, since the counterweight 4 is at the rear end, a rear support structure needs to be designed to prevent the rear end of the box 2 from deforming due to prolonged suspension.

[0049] The rear bracket 102 and the shelf 202 are chamfered, which serve as a guide when the box 2 retracts into the fixing frame 1.

[0050] In the preferred embodiment, the fixed frame 1 is equipped with a linear drive cylinder 7, which drives the housing 2 to move back and forth.

[0051] The linear drive cylinder 7 can be an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder.

[0052] In the preferred embodiment, the two ends of the linear drive cylinder 7 are hinged to the fixed frame 1 and the housing 2, respectively.

[0053] The cylinder body and cylinder rod end of the linear drive cylinder 7 can be connected to the fixed frame 1 and the housing 2 by a hinged seat. Even if the housing 2 can be slightly lowered relative to the rear end and swing at a certain angle, the hinged linear drive cylinder 7 can also adapt to the situation.

[0054] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A rearward-shifting center of gravity structure for a forklift-operated AGV, characterized in that: It includes a fixed frame (1) and a box (2) that can move back and forth along the AGV. The fixed frame (1) is provided with guide cylinders (101) at both ends. The box (2) is provided with a forward-extending connecting arm (201). The connecting arm (201) is slidably sleeved with the guide cylinder (101). The front end of the connecting arm (201) is used to hinge with the rear end of the front fork (3). The rear end of the box (2) is provided with a counterweight block (4). It is also provided with a support frame (5) connected to the fixed frame (1). The lower end of the support frame (5) is provided with a guide sleeve (501). The front fork (3) is slidably sleeved with the guide sleeve (501).

2. The rearward shift structure for a forklift AGV according to claim 1, characterized in that: The fixed frame (1) has a column hole (103) inside its rear end. A slidable pin (6) is provided in the column hole (103). An inclined channel (601) is provided in the pin (6). The fixed frame (1) also has a movable inner pull rod (602) at its rear end. The inner pull rod (602) has a thin rod part (603) at one end near the pin (6). A rotatable abutment roller (604) is provided at the end of the thin rod part (603). The abutment roller (604) rolls against the upper and lower inclined walls of the inclined channel (601). The guide sleeve (501) and the guide cylinder (101) have pin holes (605). The inner pull rod (602) moves so that the upper end of the pin (6) is inserted into the pin hole (605) or pulled out from the pin hole (605).

3. The rearward shift structure for a forklift AGV according to claim 2, characterized in that: The connecting arm (201) may be provided with a sliding rear pull rod (607). The front end of the rear pull rod (607) is used to connect with the inner pull rod (602). The rear end of the connecting arm (201) is provided with a rotatable nut (608). The rear end of the rear pull rod (607) is threadedly connected to the nut (608). The housing (2) is provided with a pin-triggered motor (610). The shaft end of the pin-triggered motor (610) and the outer wall of each nut (608) are fitted with transmission wheels (609). The transmission wheels (609) of the pin-triggered motor (610) and the transmission wheels (609) of the nut (608) are driven by a transmission belt (611).

4. The rearward shift structure for a forklift AGV according to claim 3, characterized in that: The front end of the rear tie rod (607) is provided with an annular groove (612), and the rear end of the inner tie rod (602) is provided with a constriction neck (613). The constriction neck (613) is inserted into the annular groove (612). The inner diameter of the constriction neck (613) is greater than the outer diameter of the bottom wall of the annular groove (612). The annular groove (612) is provided with a side stop (614). The inner diameter of the constriction neck (613) is smaller than the outer diameter of the side stop (614). The width of the annular groove (612) is greater than the thickness of the constriction neck (613).

5. The rearward shift structure for a forklift AGV according to claim 4, characterized in that: The front end of the rear tie rod (607) is provided with a threaded adjustment rod (606), the front end of the adjustment rod (606) is provided with a convex ring (615), and the front end of the adjustment rod (606) is provided with a stop screw (616). The convex ring (615) and the stop screw (616) form an annular groove (612).

6. The rearward shift structure for a forklift AGV according to claim 4, characterized in that: A flexible retaining ring (617) is fitted inside the neck (613).

7. The rearward shift structure for a forklift AGV according to claim 1, characterized in that: The lower rear side of the box (2) is provided with a rotatable support roller (203). When the box (2) is retracted, the lowest point of the support roller (203) is higher than the ground.

8. The rearward shift structure for a forklift AGV according to claim 7, characterized in that: The mounting bracket (1) has a rear bracket (102) at the rear end, and the box body (2) has a shelf (202) at the rear end. The rear bracket (102) is used to support the shelf (202).

9. The rearward shift structure for a forklift AGV according to claim 1, characterized in that: A linear drive cylinder (7) is provided on the fixed frame (1), and the linear drive cylinder (7) drives the housing (2) to move back and forth.

10. The rearward shift structure for a forklift AGV according to claim 9, characterized in that: The two ends of the linear drive cylinder (7) are hinged to the fixed frame (1) and the housing (2) respectively.

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