Anti-collision protection mechanism of unmanned forklift truck head

Abstract

The application relates to the technical field of unmanned forklifts and discloses an anti-collision protection mechanism of a forklift head, which comprises an anti-collision shell, a lower supporting plate fixedly arranged on the inner side of the anti-collision shell, a forklift head fixedly provided with an upper supporting plate, the upper supporting plate being arranged above the lower supporting plate, a moving guide, a collision detection piece and a reset assembly being arranged between the lower supporting plate and the upper supporting plate, and a reset driving piece being arranged on the top of the upper supporting plate. The rotating arm is deflected in the fan-shaped groove, the rotating shaft is driven to rotate, the embedded disc is driven to rotate in the sealing cover, the contact slides on the arc-shaped carbon rod, the resistance of the arc-shaped carbon rod connected to the circuit changes, the rotating shaft is monitored whether to rotate through the arc-shaped carbon rod resistance monitoring mode, the anti-collision shell is monitored whether to collide, the distance sensor is cooperated to jointly monitor whether the anti-collision shell collides, and the detection is more reliable.

Description

Technical Field

[0001] This invention relates to the field of unmanned forklift technology, specifically to an anti-collision protection mechanism for the front of an unmanned forklift. Background Technology

[0002] AGV vehicles are now widely used in various fields as unmanned vehicles capable of autonomous navigation, obstacle avoidance, and path planning.

[0003] Existing AGVs use contact edges as mechanical safety protection. The contact edges are positive and negative wires wrapped with rubber strips. When the AGV collides with an obstacle, the rubber strips on the contact edge are squeezed, the internal positive and negative terminals make contact, the circuit is connected, the vehicle's protection logic is activated, the vehicle stops running, and a safety alarm is triggered.

[0004] The existing AGV uses anti-collision contact edges as a mechanical safety feature, which only provides protection along a linear ring at a specified height. If an obstacle is lower than or higher than the contact edge and protrudes, it will not provide mechanical protection. Therefore, further improvements are needed. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an anti-collision protection mechanism for the front of an unmanned forklift, which has the advantages of stable and reliable anti-collision effect and solves the problem that the anti-collision contact edge is too low and the collision position is prone to be higher than the contact edge.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned stable and reliable anti-collision effect, the present invention provides the following technical solution: an anti-collision protection mechanism for the front of an unmanned forklift, including an anti-collision shell, a lower support plate fixedly installed on the inner side of the anti-collision shell, an upper support plate fixedly installed on the front of the forklift, the upper support plate being located above the lower support plate, a moving guide, a collision detection component and a reset component being provided between the lower support plate and the upper support plate, and a reset drive component being provided on the top of the upper support plate.

[0009] Preferably, the moving guide includes two linear slide rails fixedly installed on the top of the lower support plate, and two sliders are fixedly installed on the bottom of the upper support plate, the sliders being slidably connected to the linear slide rails.

[0010] Preferably, the movable guide includes two trays fixedly installed on the top of the lower support plate. A fan-shaped groove is formed on the top of each tray, and a rotating shaft is rotatably connected through the center of each tray. A rotating arm is fixedly installed at the top of the rotating shaft, and a connecting column is fixedly installed at the top of the end of the rotating arm away from the rotating shaft. The connecting column has a T-shaped cross-section, and a second slider is rotatably connected to the outside of the connecting column. Two guide frames are fixedly installed at the bottom of the upper support plate, and the second slider is slidably connected inside the guide frames. Springs are fixedly installed between the left and right sidewalls of the guide frames and the second slider. An elastic element is connected to the bottom end of the rotating shaft. Damping components are provided on both sides of the second slider.

[0011] Preferably, the elastic element includes two support frames fixedly installed at the bottom of the lower support plate, each support frame having a slide block slidably connected thereon, and a pressure plate fixedly installed at the opposite ends of the two slide blocks. L-shaped plates are provided on both sides of the pressure plate, and the L-shaped plates are fixedly installed at the bottom of the lower support plate. A spring is fixedly installed between the L-shaped plates and the pressure plate. A compensation frame is fixedly installed at the opposite ends of the two slide blocks. A turntable is fixedly installed at the bottom end of the rotating shaft, and a push column is fixedly installed at the bottom edge of the turntable, the push column being slidably connected within the compensation frame.

[0012] Preferably, the damping assembly includes two slide rods fixedly installed on the left and right sides of the slider two. The slide rods are slidably connected to the guide frame. A fixing plate is fixedly installed at the end of the slide rod away from the slider two. A piston rod is fixedly installed at the end of the fixing plate away from the slide rod. A piston column is fixedly installed between the opposite ends of the two piston rods. A spiral groove is arrayed on the circumferential surface of the piston column. The spiral groove communicates with both ends of the piston column. A piston cylinder is fixedly installed on the front side of the guide frame. The piston cylinder is filled with hydraulic oil. The piston column is slidably connected inside the piston cylinder.

[0013] Preferably, the collision detection component includes a trigger plate fixedly installed on the front side of the top of the lower support plate, a bracket rotatably connected to the top of the upper support plate, a limit switch fixedly installed on the left end of the bracket, the limit switch being located behind the trigger plate, a tension spring connected to the right end of the bracket, the end of the tension spring away from the bracket being fixedly installed on the top of the upper support plate, and a limit plate fixedly installed on the top of the upper support plate, the limit plate being attached to the rear side of the right half of the bracket.

[0014] Preferably, the collision detection component includes an arched seat fixedly installed at the center of the bottom of the upper support plate, and a distance sensor is fixedly installed at the bottom of the arched seat, with the distance sensor facing the fixed plate.

[0015] Preferably, the collision detection component further includes a sealing cover fixedly installed at the bottom of the lower support plate. An arc-shaped carbon rod is fixedly installed on the bottom wall of the sealing cover. A rotating shaft is rotatably connected through the center of the sealing cover. An embedded plate is fixedly installed on the circumferential surface of the rotating shaft. The embedded plate is rotatably connected inside the sealing cover. A contact is fixedly installed at the bottom of the embedded plate. The contact is slidably connected to the arc-shaped carbon rod.

[0016] Preferably, the reset assembly includes two fixed covers fixedly installed at the bottom of the upper support plate. A spiral disk is rotatably connected inside the fixed cover. Four sets of sliding grooves are arrayed at the bottom of the fixed cover. A slider three is slidably connected in the sliding groove. An inner support rod is fixedly installed at the bottom of the slider three. A collar is fixedly installed at the top of the lower support plate. The axis of the collar coincides with the axis of the fixed cover and the spiral disk. The inner support rod is located inside the collar.

[0017] Preferably, the reset drive component includes a slide bar with two guide grooves on its surface. Two fixing buttons are fixedly installed on the top of the upper support plate. The fixing buttons have a T-shaped cross-section. The slide bar is slidably connected to the fixing buttons through the guide grooves. A rack plate is provided on the rear side of both ends of the slide bar. A connecting shaft is fixedly installed at the center of the top of the scroll plate. The connecting shaft is rotatably connected to the upper support plate. A gear is fixedly installed at the top of the connecting shaft, and the gear meshes with the rack plate. A motor is fixedly installed on the top of the upper support plate. A threaded rod is connected to the output end of the motor. A lug is fixedly installed in the middle of the slide bar, and the lug is threadedly connected to the threaded rod.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a collision protection mechanism for the front of an unmanned forklift, which has the following beneficial effects:

[0020] 1. The anti-collision protection mechanism of the unmanned forklift head causes relative displacement between the lower and upper pallets when the anti-collision shell collides with the vehicle. The rotating arm deflects in the fan-shaped groove, and the second slider slides in the guide frame. This causes a change in the distance between the fixed plate and the distance sensor, thereby triggering the vehicle circuit, stopping the vehicle and issuing an audible and visual warning. Because the anti-collision shell has a large coverage area, it can more reliably monitor whether a collision has occurred.

[0021] 2. The anti-collision protection mechanism of the unmanned forklift head deflects the rotating arm in the fan-shaped groove, thereby driving the rotating shaft to rotate, which in turn drives the insert to rotate in the sealed cover. The contact slides on the arc-shaped carbon rod, and the resistance of the arc-shaped carbon rod connected to the circuit changes. By monitoring the resistance of the arc-shaped carbon rod, the mechanism can monitor whether the rotating shaft rotates, and thus whether the anti-collision shell has collided. In conjunction with the distance sensor, it can monitor whether the anti-collision shell has collided, making the detection more reliable.

[0022] 3. The anti-collision protection mechanism of the unmanned forklift head, when the slider two slides along the guide frame, drives the piston rod to slide inside the piston cylinder. During the flow of hydraulic oil through the spiral groove, the movement of the piston rod inside the piston cylinder is suppressed. When the rotating shaft rotates, it drives the push rod to make a circular motion, which drives the pressure plate to move between the two L-shaped plates. The elasticity of the spring two suppresses the movement of the pressure plate, thereby suppressing the rotation of the rotating shaft, thus suppressing the movement of the anti-collision shell relative to the front of the vehicle and absorbing part of the collision energy.

[0023] 4. The anti-collision protection mechanism of the unmanned forklift head, after the anti-collision shell collides, the anti-collision shell moves relative to the head of the vehicle. Through the rotation of the volute, the four sets of sliders move outward along the slide groove. The inner support rod pushes the collar outward, so that the axis of the collar coincides with the axis of the fixed cover, thereby restoring the position of the lower support plate and the upper support plate to the initial state. The relative displacement of the lower support plate and the upper support plate in the left-right direction and the front-back direction can be reset in one go. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of an anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention;

[0025] Figure 2 This is a three-dimensional exploded view of an embodiment of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0026] Figure 3 This is a three-dimensional structural schematic diagram of a second embodiment of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention;

[0027] Figure 4 This is a bottom-view three-dimensional structural diagram of a second embodiment of an anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the moving guide and damping components of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0029] Figure 6 This is a three-dimensional structural diagram of the pallet and swing arm of an anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the moving guide component of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention;

[0031] Figure 8 This is a three-dimensional structural diagram of the elastic element in the moving guide of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0032] Figure 9This is a three-dimensional structural diagram of the damping component of an anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0033] Figure 10 This is a three-dimensional structural diagram of the reset component of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention;

[0034] Figure 11 This is a three-dimensional structural diagram of the reset drive component of the anti-collision protection mechanism for the front of an unmanned forklift proposed in this invention.

[0035] In the diagram: 100, anti-collision shell; 200, lower support plate; 300, upper support plate; 400, moving guide; 500, collision detection component; 600, damping assembly; 700, reset assembly; 800, reset drive component;

[0036] 301. L-shaped mounting bracket; 401. Linear slide rail; 402. Slider one; 403. Tray; 404. Sector groove; 405. Rotating shaft; 406. Rotating arm; 407. Connecting column; 408. Slider two; 409. Guide frame; 410. Spring one; 411. Support frame; 412. Slide seat; 413. Pressure plate; 414. L-shaped plate; 415. Spring two; 416. Compensation frame; 417. Turntable; 418. Push column;

[0037] 501. Trigger plate; 502. Bracket; 503. Limit switch; 504. Tension spring; 505. Limit plate; 506. Arched seat; 507. Distance sensor; 508. Sealing cover; 509. Arc-shaped carbon rod; 510. Insert plate; 511. Contact;

[0038] 601. Slide rod; 602. Fixing plate; 603. Piston rod; 604. Piston column; 605. Helical groove; 606. Piston cylinder;

[0039] 701. Fixed cover; 702. Scroll plate; 703. Slide groove; 704. Slider three; 705. Inner support rod; 706. Collar;

[0040] 801. Sliding bar; 802. Guide groove; 803. Fixing button; 804. Rack plate; 805. Connecting shaft; 806. Gear; 807. Motor; 808. Threaded rod; 809. Lug. Detailed Implementation

[0041] 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.

[0042] Please see Figures 1-4 A collision protection mechanism for the front of an unmanned forklift includes a collision shield 100, a lower support plate 200 fixedly installed inside the collision shield 100, and an upper support plate 300 fixedly installed on the forklift front. Specifically, the upper support plate 300 is fixedly installed on the forklift front via an L-shaped mounting bracket 301, and the upper support plate 300 is located above the lower support plate 200. The collision shield 100 is attached to the forklift front. A moving guide 400, a collision detection component 500, and a reset assembly 700 are provided between the lower support plate 200 and the upper support plate 300. A reset drive component 800 is provided on the top of the upper support plate 300.

[0043] Example 1: Please refer to Figures 1-3 The moving guide 400 includes two linear slide rails 401 fixedly mounted on the top of the lower support plate 200, and two sliders 402 fixedly mounted on the bottom of the upper support plate 300. The sliders 402 are slidably connected to the linear slide rails 401. The linear slide rails 401 and sliders 402 cooperate to guide the movement path of the anti-collision shell 100. This allows the anti-collision shell 100 to move relative to the forklift front in the front-rear direction, meeting the requirements for most forklift front collision scenarios. The structure is simple and the cost is low.

[0044] The collision detection component 500 includes a trigger plate 501 fixedly installed on the front side of the top of the lower support plate 200, a bracket 502 rotatably connected to the top of the upper support plate 300, a limit switch 503 fixedly installed on the left end of the bracket 502, the limit switch 503 being located behind the trigger plate 501, a tension spring 504 connected to the right end of the bracket 502, the end of the tension spring 504 away from the bracket 502 being fixedly installed on the top of the upper support plate 300, and a limit plate 505 fixedly installed on the top of the upper support plate 300, the limit plate 505 being attached to the rear side of the right half of the bracket 502.

[0045] When the forklift front is impacted, the anti-collision shell 100 moves backward relative to the forklift front, triggering the trigger plate 501 to press the limit switch 503, triggering the vehicle circuit, stopping the vehicle and issuing an audible and visual warning. When the anti-collision shell 100 moves a large distance, the limit switch 503, during the pressing process of the trigger plate 501, deflects backward along with the bracket 502, stretching the tension spring 504, thus preventing the limit switch 503 from being damaged by excessive compression. When the reset assembly 700 and the reset drive 800 drive the anti-collision shell 100 to move in the opposite direction for reset, the bracket 502 resets under the tension of the tension spring 504, causing the limit switch 503 to move to its initial position.

[0046] Example 2: Please refer to Figures 3-7The movable guide 400 includes two trays 403 fixedly installed on the top of the lower support plate 200. A fan-shaped groove 404 is formed on the top of each tray 403. A rotating shaft 405 is rotatably connected through the center of each tray 403. A rotating arm 406 is fixedly installed at the top of the rotating shaft 405. Initially, the rotating arm 406 is located in the middle of the fan-shaped groove 404. A connecting post 407 is fixedly installed at the top of the end of the rotating arm 406 away from the rotating shaft 405. The connecting post 407 has a T-shaped cross-section. A slider 408 is rotatably connected to the outside of the connecting post 407 to prevent the slider 408 from detaching from the connecting post 407. Specifically, the two trays 403, the rotating arm 406, and the connecting post 407 are mirror images of each other about the center of the lower support plate 200, meaning one rotating arm 406 tilts to the right front and the other tilts to the left front.

[0047] Two guide frames 409 are fixedly installed at the bottom of the upper support plate 300. A second slider 408 is slidably connected inside the guide frames 409. Springs 410 are fixedly installed between the left and right side walls of the guide frames 409 and the second slider 408. An elastic element is connected to the bottom end of the rotating shaft 405; the elastic element inhibits the rotation of the rotating shaft 405. Damping components 600 are provided on both sides of the second slider 408. The damping components 600 and the springs 410 cooperate to inhibit the sliding of the second slider 408 inside the guide frames 409.

[0048] During forklift movement, the forklift front end is subjected to impacts not only in the same direction as its travel but also perpendicular to it. Therefore, the swing arm 406 can deflect within the sector groove 404, while the slider 408 can slide within the guide frame 409, allowing the lower support plate 200 and the upper support plate 300 to move relative to each other in the front-back direction and also in the left-right direction.

[0049] When the upper support plate 300 and the lower support plate 200 move relative to each other in the front-back direction, or when the upper support plate 300 and the lower support plate 200 move relative to each other in the left-right direction, the slider 408 will slide within the guide frame 409, and the rotating arm 406 will deflect within the sector groove 404.

[0050] Please see Figure 4 and Figure 8The elastic element includes two support frames 411 fixedly installed at the bottom of the lower support plate 200. Each support frame 411 is slidably connected to a slide block 412. A pressure plate 413 is fixedly installed at the opposite ends of the two slide blocks 412. L-shaped plates 414 are provided on both sides of the pressure plate 413. The L-shaped plates 414 are fixedly installed at the bottom of the lower support plate 200. A second spring 415 is fixedly installed between the L-shaped plates 414 and the pressure plate 413. Due to the elasticity of the second spring 415, the pressure plate 413 tends to be located in the middle between the two L-shaped plates 414. A compensation frame 416 is fixedly installed at the opposite ends of the two slide blocks 412. The compensation frame 416 and the pressure plate 413 are perpendicular to the slide blocks 412 and extend backward. A turntable 417 is fixedly installed at the bottom end of the rotating shaft 405. A push post 418 is fixedly installed at the bottom edge of the turntable 417 and is slidably connected inside the compensation frame 416.

[0051] As the rotating arm 406 deflects within the sector groove 404, the rotating shaft 405 and the turntable 417 rotate, causing the push column 418 to perform a circular motion. The push column 418 pushes the compensation frame 416 to the left or right, thereby causing the pressure plate 413 to move between the two L-shaped plates 414. This compresses the second spring 415 on one side of the pressure plate 413 and stretches the second spring 415 on the other side of the pressure plate 413. Thus, the elasticity of the second spring 415 can suppress the rotation of the rotating shaft 405.

[0052] Please see Figure 9 The damping assembly 600 includes two slide rods 601 fixedly installed on the left and right sides of the second slider 408. The slide rods 601 are slidably connected to the guide frame 409. A fixing plate 602 is fixedly installed at the end of the slide rod 601 away from the second slider 408. A piston rod 603 is fixedly installed at the end of the fixing plate 602 away from the slide rod 601. A piston column 604 is fixedly installed between the opposite ends of the two piston rods 603. The second slider 408, slide rods 601, fixing plate 602, piston rods 603 and piston column 604 together form a square frame structure.

[0053] A spiral groove 605 is arrayed on the circumferential surface of the piston rod 604, connecting to both ends of the piston rod 604. A piston cylinder 606 is fixedly installed on the front side of the guide frame 409, and the piston cylinder 606 is filled with hydraulic oil. The piston rod 604 is slidably connected inside the piston cylinder 606, and the diameter of the piston rod 604 is equal to the inner diameter of the piston cylinder 606. Thus, when the slider 2 408 slides inside the guide frame 409, it drives the piston rod 604 to slide synchronously inside the piston cylinder 606. The hydraulic oil flows through the spiral groove 605. The spiral design of the spiral groove 605 extends the flow path of the hydraulic oil inside the spiral groove 605; the resistance of the hydraulic oil to the piston rod 604 inhibits the sliding of the slider 2 408 inside the guide frame 409.

[0054] Please see Figures 5-7The collision detection component 500 includes an arched seat 506 fixedly mounted at the center of the bottom of the upper support plate 300. A distance sensor 507 is fixedly mounted at the bottom of the arched seat 506, facing the fixed plate 602. Thus, when the slider 408 slides inside the guide frame 409, in conjunction with the connecting action of the slide rod 601, it causes the fixed plate 602 to move relative to the distance sensor 507. When the anti-collision shell 100 collides, and the slider 408 moves relative to the guide frame 409, the fixed plate 602 moves, and the distance sensor 507 detects the change in the distance between the fixed plate 602 and the distance sensor 507, triggering the vehicle circuit, stopping the vehicle, and issuing an audible and visual warning. In practice, both ends of the arched seat 506 extend to the outer sides of the ends of the distance sensor 507 to prevent the fixed plate 602 from colliding with the distance sensor 507.

[0055] The collision detection component 500 also includes a sealing cover 508 fixedly installed at the bottom of the lower support plate 200. An arc-shaped carbon rod 509 is fixedly installed on the bottom wall of the sealing cover 508. A rotating shaft 405 is rotatably connected through and rotatably connected to the center of the sealing cover 508. A disc 510 is fixedly installed on the circumferential surface of the rotating shaft 405. The disc 510 is rotatably connected inside the sealing cover 508. A contact 511 is fixedly installed at the bottom of the disc 510. The contact 511 is slidably connected to the arc-shaped carbon rod 509. When the rotating shaft 405 rotates, it drives the disc 510 to rotate inside the sealing cover 508, and the contact 511 slides on the arc-shaped carbon rod 509. The arc-shaped carbon rod 509 and the contact 511 are connected in series in the circuit. The contact 511 slides on the arc-shaped carbon rod 509, causing the length of the arc-shaped carbon rod 509 connected to the circuit to change. By monitoring the resistance of the part of the arc-shaped carbon rod 509 connected to the circuit, it is possible to detect whether the contact 511 slides on the arc-shaped carbon rod 509, and thus monitor whether the rotating shaft 405 rotates.

[0056] Please see Figure 10 The reset assembly 700 includes two fixed covers 701 fixedly installed at the bottom of the upper support plate 300. A spiral disk 702 is rotatably connected inside the fixed cover 701. Four sets of sliding grooves 703 are arrayed at the bottom of the fixed cover 701. A slider 704 is slidably connected inside the sliding groove 703. An inner support rod 705 is fixedly installed at the bottom of the slider 704. A collar 706 is fixedly installed at the top of the lower support plate 200. The axis of the collar 706 coincides with the axis of the fixed cover 701 and the spiral disk 702. The inner support rod 705 is located inside the collar 706. When the lower support plate 200 and the upper support plate 300 are relatively displaced, the axis of the collar 706 will be offset from the axis of the fixed cover 701. The rotation of the spiral disk 702 drives the four sets of sliders 704 to move outward along the four sets of sliding grooves 703 respectively, and the inner support rod 705 moves outward synchronously, thereby pushing the collar 706 to move, so that the axis of the collar 706 coincides with the axis of the fixed cover 701 again, and the relative position of the lower support plate 200 and the upper support plate 300 returns to the initial state.

[0057] Please see Figure 11 The reset drive component 800 includes a slide bar 801, which is arranged along the length of the upper support plate 300. Two guide grooves 802 are formed on the surface of the slide bar 801. Two fixing buttons 803 are fixedly installed on the top of the upper support plate 300. The fixing buttons 803 have a T-shaped cross-section. The slide bar 801 is slidably connected to the fixing buttons 803 through the guide grooves 802. The fixing buttons 803 and the guide grooves 802 cooperate to guide the movement path of the slide bar 801.

[0058] Both ends of the slide bar 801 are equipped with rack plates 804 on their rear sides. A connecting shaft 805 is fixedly installed at the top center of the spiral disk 702. The connecting shaft 805 is rotatably connected to the upper support plate 300. A gear 806 is fixedly installed at the top of the connecting shaft 805, and the gear 806 meshes with the rack plates 804. By moving the slide bar 801 along the length of the upper support plate 300, the gear 806 is driven to rotate, thereby driving the connecting shaft 805 and the spiral disk 702 to rotate.

[0059] A motor 807 is fixedly mounted on the top of the upper support plate 300. A threaded rod 808 is connected to the output end of the motor 807. A lug 809 is fixedly mounted in the middle of the slide bar 801, and the lug 809 is threadedly connected to the threaded rod 808. The threaded rod 808 and the slide bar 801 are parallel to each other. The motor 807 drives the threaded rod 808 to rotate, thereby causing the lug 809 and the slide bar 801 to move along the length of the upper support plate 300.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A collision protection mechanism for a driverless fork truck vehicle head, comprising a collision protection shell (100), characterized in that: The anti-collision shell (100) is internally fixedly installed with a lower supporting plate (200), a forklift head is fixedly installed with an upper supporting plate (300), the upper supporting plate (300) is located above the lower supporting plate (200), and a moving guide (400), a collision detection part (500) and a reset assembly (700) are arranged between the lower supporting plate (200) and the upper supporting plate (300); and the upper supporting plate (300) is provided with a reset driving part (800) at the top; The reset assembly (700) comprises two fixed covers (701) fixedly installed at the bottom of the upper supporting plate (300), the fixed cover (701) is rotatably connected with a spiral disc (702) inside, four groups of sliding grooves (703) are arrayed at the bottom of the fixed cover (701), sliding blocks three (704) are slidably connected in the sliding grooves (703), inner supporting rods (705) are fixedly installed at the bottom of the sliding blocks three (704), a sleeve ring (706) is fixedly installed at the top of the lower supporting plate (200), the axis of the sleeve ring (706) coincides with the axes of the fixed cover (701) and the spiral disc (702), and the inner supporting rods (705) are located inside the sleeve ring (706); The moving guide (400) comprises two trays (403) fixedly installed at the top of the lower supporting plate (200), the tray (403) is provided with a fan-shaped groove (404) at the top, a rotating shaft (405) is rotatably connected at the center of the tray (403), a rotating arm (406) is fixedly installed at the top of the end of the rotating shaft (405) away from the tray (403), a connecting column (407) is fixedly installed at the top of the end of the rotating arm (406) away from the rotating shaft (405), the connecting column (407) is in T-shaped cross section, and sliding blocks two (408) are rotatably connected outside the connecting column (407); Two guide frames (409) are fixedly installed at the bottom of the upper supporting plate (300), the sliding blocks two (408) are slidably connected inside the guide frames (409), spring one (410) is fixedly installed between the left and right side walls of the guide frame (409) and the sliding blocks two (408), and the rotating shaft (405) is connected with an elastic part at the bottom end; Damping assemblies (600) are arranged on both sides of the sliding blocks two (408); The damping assembly (600) comprises two sliding rods (601) fixedly installed on the left and right sides of the sliding blocks two (408), the sliding rods (601) are slidably connected on the guide frames (409), fixed plates (602) are fixedly installed at the ends of the sliding rods (601) away from the sliding blocks two (408), piston rods (603) are fixedly installed at the ends of the fixed plates (602) away from the sliding rods (601), a piston column (604) is fixedly installed between the opposite ends of the two piston rods (603), helical grooves (605) are arrayed on the circumferential surface of the piston column (604), the helical grooves (605) are communicated to the two ends of the piston column (604), a piston cylinder (606) is fixedly installed at the front side of the guide frame (409), the piston cylinder (606) is filled with hydraulic oil, and the piston column (604) is slidably connected in the piston cylinder (606).

2. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 1, characterized in that: The mobile guide (400) comprises two linear slides (401) fixedly installed on the top of the lower supporting plate (200), two sliding blocks (402) are fixedly installed on the bottom of the upper supporting plate (300), and the sliding blocks (402) are slidably connected to the linear slides (401).

3. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 2, characterized in that: The elastic member comprises two supporting frames (411) fixedly installed on the bottom of the lower supporting plate (200), a sliding seat (412) is slidably connected to each supporting frame (411), a pressing plate (413) is fixedly installed on the opposite end of each sliding seat (412), L-shaped plates (414) are arranged on the left and right sides of the pressing plate (413), the L-shaped plates (414) are fixedly installed on the bottom of the lower supporting plate (200), and spring (415) is fixedly installed between the L-shaped plates (414) and the pressing plate (413). The opposite end of each sliding seat (412) is fixedly installed with a compensation frame (416), the bottom end of the rotating shaft (405) is fixedly installed with a rotating disc (417), the bottom edge of the rotating disc (417) is fixedly installed with a pushing column (418), and the pushing column (418) is slidably connected to the compensation frame (416).

4. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 2, characterized in that: The collision detection member (500) comprises a trigger plate (501) fixedly installed on the top of the lower supporting plate (200), a support (502) rotatably connected to the top of the upper supporting plate (300), a travel switch (503) fixedly installed on the left end of the support (502), the travel switch (503) located on the rear side of the trigger plate (501), a tension spring (504) connected to the right end of the support (502), one end of the tension spring (504) fixedly installed on the top of the upper supporting plate (300) and away from the support (502), a limiting plate (505) fixedly installed on the top of the upper supporting plate (300), and the limiting plate (505) abuts on the rear side of the right half of the support (502).

5. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 4, characterized in that: The collision detection member (500) comprises an arc-shaped seat (506) fixedly installed at the center of the bottom of the upper supporting plate (300), and a distance sensor (507) fixedly installed on the bottom of the arc-shaped seat (506) and facing the fixed plate (602).

6. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 5, characterized in that: The collision detection member (500) further comprises a sealing cover (508) fixedly installed on the bottom of the lower supporting plate (200), an arc-shaped carbon rod (509) fixedly installed on the bottom wall of the sealing cover (508), the rotating shaft (405) penetratingly and rotatably connected to the center of the sealing cover (508), an embedded disc (510) fixedly installed on the circumferential surface of the rotating shaft (405), the embedded disc (510) rotatably connected to the inside of the sealing cover (508), a contact (511) fixedly installed on the bottom of the embedded disc (510), and the contact (511) slidably connected to the arc-shaped carbon rod (509).

7. The anti-collision protection mechanism of the unmanned fork truck vehicle head according to claim 1, characterized in that: The reset driving element (800) comprises a slide bar (801), two guide grooves (802) are formed on the surface of the slide bar (801), two fixed buttons (803) are fixedly installed on the top of the upper supporting plate (300), the fixed buttons (803) are T-shaped in cross section, the slide bar (801) is slidably connected with the fixed buttons (803) through the guide grooves (802), toothed plate (804) is arranged on the rear side of both ends of the slide bar (801), a connecting shaft (805) is fixedly installed at the top center of the vortex disc (702), the connecting shaft (805) penetrates through and is rotatably connected to the upper supporting plate (300), a gear (806) is fixedly installed at the top end of the connecting shaft (805), and the gear (806) is meshed with the toothed plate (804); A motor (807) is fixedly installed on the top of the upper supporting plate (300), a threaded rod (808) is connected to the output end of the motor (807), lugs (809) are fixedly installed on the middle of the slide bar (801), and the lugs (809) are threadedly connected to the threaded rod (808).

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