Anti-collision protection mechanism of unmanned forklift head

Abstract

The invention relates to the technical field of unmanned forklifts, and discloses an unmanned forklift head anti-collision protection mechanism which comprises an anti-collision shell, a lower supporting plate is fixedly installed on the inner side of the anti-collision shell, an upper supporting plate is fixedly installed on the forklift head, and the upper supporting plate is located above the lower supporting plate. A moving guide part, a collision detection part and a reset assembly are arranged between the lower supporting plate and the upper supporting plate, and a reset driving part is arranged at the top of the upper supporting plate. The rotating arm deflects in the fan-shaped groove, so that 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, and the resistance of the arc-shaped carbon rod connected to a circuit is changed, and therefore whether the rotating shaft rotates or not is monitored by monitoring the resistance of the arc-shaped carbon rod, and then whether the anti-collision shell collides or not is monitored. And whether the anti-collision shell is collided or not is monitored together with the distance sensor, so that the detection is more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned forklifts, and in particular to an anti-collision protection mechanism for the front end of an unmanned forklift. Background Art

[0002] AGV vehicles are currently widely used in various fields. As an unmanned vehicle that can autonomously navigate, avoid obstacles, and realize path planning, it has become an important part of my country's current realization of Industry 4.0.

[0003] Existing AGVs use touch edges as mechanical safety protection. The touch edges are positive and negative wire levels wrapped in rubber strips. When the AGV collides with an obstacle, the touch edge rubber strips are squeezed, the internal positive and negative poles come into contact, the circuit is connected, the vehicle protection logic is turned on, the vehicle stops running, and a safety alarm is issued.

[0004] The existing AGV uses an anti-collision edge as a mechanical safety protection, which can only protect a circle of linear protection at a specified height. If an obstacle is lower than the edge or higher than the edge and protrudes, the mechanical protection will not be effective. Therefore, further improvement is possible. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present 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 touch edge height is low, and the collision position is easily higher than the touch edge.

[0006] In order to achieve the purpose of stable and reliable anti-collision effect mentioned above, the present invention provides the following technical solution: an anti-collision protection mechanism for the front of an unmanned forklift, comprising 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 movable guide, a collision detection member and a reset assembly being arranged between the lower support plate and the upper support plate, and a reset drive member being arranged on the top of the upper support plate.

[0007] Preferably, the movable guide member includes two linear slide rails fixedly mounted on the top of the lower support plate, and two sliders 1 are fixedly mounted on the bottom of the upper support plate, and the sliders 1 are slidably connected to the linear slide rails.

[0008] Preferably, the movable guide comprises two trays fixedly mounted on the top of the lower support plate, a fan-shaped groove is provided on the top of the tray, a rotating shaft passes through the center of the tray and is rotatably connected, a rotating arm is fixedly mounted on the top of the rotating shaft, a connecting column is fixedly mounted on the top of the rotating arm away from the rotating shaft, the cross-section of the connecting column is T-shaped, and a slider 2 is rotatably connected to the outside of the connecting column; two guide frames are fixedly mounted on the bottom of the upper support plate, and the slider 2 is slidably connected to the inside of the guide frame, a spring 1 is fixedly mounted between the left and right side walls of the guide frame and the slider 2, and the bottom end of the rotating shaft is connected to an elastic member; damping components are provided on both sides of the slider 2.

[0009] Preferably, the elastic member includes two support frames fixedly mounted on the bottom of the lower support plate, each of the support frames is slidably connected to a slide, a pressure plate is fixedly mounted on the opposite ends of the two slides, L-shaped plates are provided on the left and right sides of the pressure plate, the L-shaped plates are fixedly mounted on the bottom of the lower support plate, and a spring 2 is fixedly mounted between the L-shaped plate and the pressure plate; a compensation frame is fixedly mounted on the opposite ends of the two slides, a turntable is fixedly mounted on the bottom end of the rotating shaft, a push column is fixedly mounted at the bottom edge of the turntable, and the push column is slidably connected in the compensation frame.

[0010] Preferably, the damping assembly includes two sliding rods fixedly mounted on the left and right sides of the slider 2, the sliding rods are slidably connected to the guide frame, a fixed plate is fixedly mounted on the end of the sliding rod away from the slider 2, a piston rod is fixedly mounted on the end of the fixed plate away from the sliding rod, a piston column is fixedly mounted between the opposite ends of the two piston rods, spiral grooves are arranged in an array on the circumferential surface of the piston column, the spiral grooves are connected to the two ends of the piston column, a piston cylinder is fixedly mounted on the front side of the guide frame, the piston cylinder is filled with hydraulic oil, and the piston column is slidably connected in the piston cylinder.

[0011] Preferably, the collision detection component includes a trigger plate fixedly mounted on the front side of the top of the lower support plate, the top of the upper support plate is rotatably connected to a bracket, a limit switch is fixedly mounted on the left end of the bracket, the limit switch is located on the rear side of the trigger plate, the right end of the bracket is connected to a tension spring, the end of the tension spring away from the bracket is fixedly mounted on the top of the upper support plate, a limit plate is fixedly mounted on the top of the upper support plate, and the limit plate is attached to the rear side of the right half of the bracket.

[0012] Preferably, the collision detection component includes an arched seat fixedly mounted at the center of the bottom of the upper supporting plate, a distance sensor is fixedly mounted at the bottom of the arched seat, and the distance sensor faces the fixed plate.

[0013] Preferably, the collision detection part also includes a sealing cover fixedly mounted on the bottom of the lower support plate, an arc-shaped carbon rod is fixedly mounted on the bottom wall of the sealing cover, a rotating shaft passes through and is rotatably connected to the center of the sealing cover, an embedded disk is fixedly mounted on the circumferential surface of the rotating shaft, the embedded disk is rotatably connected to the inside of the sealing cover, a contact is fixedly mounted on the bottom of the embedded disk, and the contact is slidably connected to the arc-shaped carbon rod.

[0014] Preferably, the reset assembly includes two fixed covers fixedly mounted on the bottom of the upper support plate, a vortex disk is rotatably connected inside the fixed cover, four groups of slide grooves are arranged in the bottom array of the fixed cover, a slider three is slidably connected in the slide groove, an inner support rod is fixedly mounted on the bottom of the slider three, a ring is fixedly mounted on the top of the lower support plate, the axis of the ring coincides with the axis of the fixed cover and the vortex disk, and the inner support rod is located inside the ring.

[0015] Preferably, the reset drive component includes a slide bar, two guide grooves are provided on the surface of the slide bar, two fixing buttons are fixedly installed on the top of the upper support plate, the cross section of the fixing button is T-shaped, the slide bar is slidably connected to the fixing button through the guide groove, and a rack plate is provided on the rear side of both ends of the slide bar, and a connecting shaft is fixedly installed at the top center of the vortex disk, and the connecting shaft passes through and is rotatably connected to the upper support plate, and a gear is fixedly installed on the top of the connecting shaft, and the gear is meshed with the rack plate; a motor is fixedly installed on the top of the upper support plate, and a threaded rod is connected to the output end of the motor, and a lug is fixedly installed on the middle of the slide bar, and the lug is threadedly connected to the threaded rod.

[0016] Compared with the prior art, the present invention provides an anti-collision protection mechanism for the front of an unmanned forklift, which has the following beneficial effects: 1. The anti-collision protection mechanism of the unmanned forklift's front end causes a collision through the anti-collision shell, causing relative displacement between the lower and upper support plates. The rotating arm deflects in the fan-shaped groove, while the second slider slides in the guide frame, causing the distance between the fixed plate and the distance sensor to change, thereby triggering the vehicle circuit, stopping the vehicle and issuing an audible and visual warning. The anti-collision shell has a wide coverage area, which can more reliably monitor whether a collision has occurred. 2. The anti-collision protection mechanism of the unmanned forklift's front end rotates by rotating the arm in the fan-shaped slot, thereby driving the rotating shaft to rotate, and then the embedded disk to rotate in the sealing 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 rotation of the rotating shaft is detected, and then the collision of the anti-collision shell is detected. The collision of the anti-collision shell is monitored in conjunction with the distance sensor, making the detection more reliable. 3. The anti-collision protection mechanism of the unmanned forklift's front end, when the slider 2 slides along the guide frame, drives the piston rod to slide in the piston cylinder. As the hydraulic oil flows through the spiral groove, it inhibits the movement of the piston rod in the piston cylinder. When the shaft rotates, it drives the push rod to make a circular motion, driving the pressure plate to move between the two L-shaped plates. The elasticity of the spring 2 inhibits the movement of the pressure plate, and then inhibits the rotation of the shaft, thereby inhibiting the movement of the anti-collision shell relative to the front end, absorbing part of the collision energy. 4. The anti-collision protection mechanism of the front of the unmanned forklift is that after the anti-collision shell collides, the anti-collision shell moves relative to the front of the vehicle, and through the rotation of the vortex plate, it drives the four groups of sliders to 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 their initial state; the relative displacement of the lower support plate and the upper support plate in the left and right directions and the front and back directions can be reset at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an anti-collision protection mechanism for the front of an unmanned forklift proposed by the present invention; Figure 2 This is a schematic diagram of a three-dimensional exploded structure of a first embodiment of an anti-collision protection mechanism for the front end of an unmanned forklift proposed by the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of a second embodiment of an anti-collision protection mechanism for the front end of an unmanned forklift proposed by the present invention; Figure 4 This is a bottom-view three-dimensional structural diagram of a second embodiment of an anti-collision protection mechanism for the front end of an unmanned forklift proposed by the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the movable guide member and the damping assembly of the anti-collision protection mechanism of the front of an unmanned forklift proposed by the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the tray and rotating arm of the anti-collision protection mechanism of the unmanned forklift head proposed by the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of a movable guide member of an anti-collision protection mechanism for the front end of an unmanned forklift proposed by the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of an elastic member in a movable guide member of an anti-collision protection mechanism for the front end of an unmanned forklift proposed by the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the damping component of the anti-collision protection mechanism of the front of an unmanned forklift proposed by the present invention; Figure 10 This is a schematic diagram of the three-dimensional structure of a reset component of an anti-collision protection mechanism for the front of an unmanned forklift proposed by the present invention; Figure 11This is a schematic diagram of the three-dimensional structure of the reset drive component of the anti-collision protection mechanism of the unmanned forklift head proposed by the present invention.

[0018] In the figure: 100, anti-collision shell; 200, lower support plate; 300, upper support plate; 400, moving guide member; 500, collision detection member; 600, damping assembly; 700, reset assembly; 800, reset drive member; 301, L-shaped mounting frame; 401, linear slide rail; 402, slider 1; 403, tray; 404, fan-shaped slot; 405, rotating shaft; 406, rotating arm; 407, connecting column; 408, slider 2; 409, guide frame; 410, spring 1; 411, support frame; 412, slide seat; 413, pressure plate; 414, L-shaped plate; 415, spring 2; 416, compensation frame; 417, turntable; 418, push column; 501, trigger plate; 502, bracket; 503, travel switch; 504, tension spring; 505, limit plate; 506, arch seat; 507, distance sensor; 508, sealing cover; 509, curved carbon rod; 510, embedded disk; 511, contact; 601, slide rod; 602, fixed plate; 603, piston rod; 604, piston column; 605, spiral groove; 606, piston cylinder; 701, fixed cover; 702, scroll plate; 703, slide groove; 704, slider three; 705, inner support rod; 706, collar; 801. Slide bar; 802. Guide groove; 803. Fixing button; 804. Rack plate; 805. Connecting shaft; 806. Gear; 807. Motor; 808. Threaded rod; 809. Lug. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4A collision protection mechanism for the front of an unmanned forklift truck includes a crash shell 100, a lower support plate 200 fixedly mounted inside the crash shell 100, and an upper support plate 300 fixedly mounted on the forklift truck's front. Specifically, the upper support plate 300 is fixedly mounted on the truck's front via an L-shaped mounting bracket 301. The upper support plate 300 is positioned above the lower support plate 200, and the crash shell 100 is attached to the truck's front. A movable guide 400, a collision detector 500, and a reset assembly 700 are disposed between the lower support plate 200 and the upper support plate 300. A reset driver 800 is disposed on top of the upper support plate 300.

[0021] Example 1: Please refer to Figure 1-Figure 3 The movable guide 400 comprises two linear rails 401 fixedly mounted on the top of the lower support plate 200. Two sliders 402 are fixedly mounted on the bottom of the upper support plate 300. Sliding sliders 402 are slidably connected to the linear rails 401. The linear rails 401 and sliders 402 cooperate to guide the movement of the crash shell 100. This allows the crash shell 100 to move forward and backward relative to the forklift head, meeting the requirements of most forklift head collision scenarios. The structure is simple and the cost is low.

[0022] The collision detection part 500 includes a trigger plate 501 fixedly installed on the front side of the top of the lower support plate 200, a bracket 502 is rotatably connected to the top of the upper support plate 300, a limit switch 503 is fixedly installed on the left end of the bracket 502, the limit switch 503 is located on the rear side of the trigger plate 501, and a tension spring 504 is connected to the right end of the bracket 502. The end of the tension spring 504 away from the bracket 502 is fixedly installed on the top of the upper support plate 300, and a limit plate 505 is fixedly installed on the top of the upper support plate 300. The limit plate 505 is attached to the rear side of the right half of the bracket 502.

[0023] When the forklift's front end is impacted, the crash shell 100 moves backward relative to the forklift's front end, triggering the plate 501 to squeeze the travel switch 503, triggering the vehicle circuit, stopping the vehicle, and emitting an audible and visual warning. When the crash shell 100 moves a significant distance, the travel switch 503 deflects backward along with the bracket 502 during the compression of the trigger plate 501, stretching the tension spring 504 and preventing damage to the travel switch 503 from excessive compression. When the reset assembly 700 and reset driver 800 drive the crash shell 100 in the reverse direction to reset, the bracket 502 resets under the tension of the tension spring 504, causing the travel switch 503 to return to its initial position.

[0024] Example 2: Please refer to Figure 3-Figure 7The movable guide 400 includes two trays 403 fixedly mounted on top of the lower support plate 200. A fan-shaped slot 404 is defined on the top of each tray 403. A rotating shaft 405 runs through the center of each tray 403 and is rotatably connected thereto. A rotating arm 406 is fixedly mounted on the top of the rotating shaft 405. Initially, the rotating arm 406 is located in the middle of the fan-shaped slot 404. A connecting post 407 is fixedly mounted on 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 and a second slider 408 is rotatably connected to the outer side of the connecting post 407 to prevent the second slider 408 from detaching from the connecting post 407. Specifically, the two trays 403, the rotating arm 406, and the connecting post 407 are arranged in a mirror image with respect to the center of the lower support plate 200, i.e., one rotating arm 406 is tilted toward the front right, while the other is tilted toward the front left.

[0025] Two guide frames 409 are fixedly mounted on the bottom of the upper support plate 300. Sliding block 408 is slidably connected within the guide frames 409. Springs 1 410 are fixedly mounted between the left and right sidewalls of the guide frames 409 and the sliding block 408. An elastic member is connected to the bottom of the rotating shaft 405, which inhibits rotation of the rotating shaft 405. Damping assemblies 600 are installed on both sides of the sliding block 408. The damping assemblies 600 and springs 1 410 cooperate to prevent sliding of the sliding block 408 within the guide frames 409.

[0026] During the travel of the forklift, the front of the vehicle is subjected to impacts in the same direction as the travel direction as well as impacts perpendicular to the travel direction. Therefore, the rotating arm 406 can deflect in the fan-shaped groove 404, and the second slider 408 can slide in the guide frame 409, so that the lower support plate 200 and the upper support plate 300 can move relative to each other in the front-to-back direction or in the left-to-right direction.

[0027] When the upper support plate 300 and the lower support plate 200 move relative to each other along the front-back direction, or when the upper support plate 300 and the lower support plate 200 move relative to each other along the left-right direction, the slider 2 408 is driven to slide in the guide frame 409 , and the rotating arm 406 is deflected in the fan-shaped groove 404 .

[0028] See also Figure 4 and Figure 8The elastic member includes two support frames 411 fixedly mounted on the bottom of the lower support plate 200. A slide 412 is slidably connected to each support frame 411. A pressure plate 413 is fixedly mounted on opposite ends of the two slides 412. L-shaped plates 414 are provided on both sides of the pressure plate 413. The L-shaped plates 414 are fixedly mounted on the bottom of the lower support plate 200. A second spring 415 is fixedly mounted between the L-shaped plates 414 and the pressure plate 413. The elasticity of the second spring 415 forces the pressure plate 413 to be positioned in the middle between the two L-shaped plates 414. A compensation frame 416 is fixedly mounted on opposite ends of the two slides 412. The compensation frame 416 and the pressure plate 413 are both perpendicular to the slides 412 and extend rearward. A turntable 417 is fixedly mounted on the bottom end of the rotating shaft 405. A push post 418 is fixedly mounted on the bottom edge of the turntable 417. The push post 418 is slidably connected within the compensation frame 416.

[0029] When the rotating arm 406 deflects in the fan-shaped groove 404, the rotating shaft 405 and the turntable 417 rotate, driving the push column 418 to make a circular motion. The push column 418 pushes the compensation frame 416 to the left or right, thereby driving the pressure plate 413 to move between the two L-shaped plates 414, so that the spring 2 415 on one side of the pressure plate 413 is compressed, and the spring 2 415 on the other side of the pressure plate 413 is stretched, so that the elasticity of the spring 2 415 can suppress the rotation of the rotating shaft 405.

[0030] See also Figure 9 The damping assembly 600 includes two sliding rods 601 fixedly installed on the left and right sides of the slider 2 408. The sliding rods 601 are slidably connected to the guide frame 409. A fixed plate 602 is fixedly installed on the end of the sliding rod 601 away from the slider 2 408. A piston rod 603 is fixedly installed on the end of the fixed plate 602 away from the sliding rod 601. A piston column 604 is fixedly installed between the opposite ends of the two piston rods 603. The slider 2 408, the sliding rod 601, the fixed plate 602, the piston rod 603 and the piston column 604 are enclosed in a square frame structure.

[0031] Spiral grooves 605 are arranged in an array on the circumference of the piston column 604, connecting the two ends of the piston column 604. A piston cylinder 606 is fixedly mounted on 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 within the piston cylinder 606. The diameter of the piston cylinder 604 is equal to the inner diameter of the piston cylinder 606. Therefore, when the second slider 408 slides within the guide frame 409, it drives the piston column 604 to slide synchronously within the piston cylinder 606. The hydraulic oil flows through the spiral grooves 605. The spiral design of the spiral grooves 605 prolongs the flow path of the hydraulic oil within the spiral grooves 605. The resistance of the hydraulic oil to the piston column 604 inhibits the sliding of the second slider 408 within the guide frame 409.

[0032] See also Figure 5-Figure 7The collision detection component 500 includes an arched seat 506 fixedly mounted at the bottom center of the upper support plate 300. A distance sensor 507 is fixedly mounted at the bottom of the arched seat 506, and the distance sensor 507 faces the fixed plate 602. Therefore, when the slider 2 408 slides inside the guide frame 409, the connection function of the slide bar 601 drives the fixed plate 602 to move relative to the distance sensor 507. When the anti-collision shell 100 collides and the slider 2 408 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, the vehicle stops, and an audible and visual warning is issued. In reality, the two ends of the arched seat 506 extend to the outside of the end of the distance sensor 507 to prevent the fixed plate 602 from colliding with the distance sensor 507.

[0033] The collision detector 500 also includes a sealing cover 508 fixedly mounted on the bottom of the lower support plate 200. A curved carbon rod 509 is fixedly mounted on the bottom wall of the sealing cover 508. The rotating shaft 405 extends through the center of the sealing cover 508 and is rotatably connected thereto. An embedded disk 510 is fixedly mounted on the circumference of the rotating shaft 405 and is rotatably connected to the interior of the sealing cover 508. A contact 511 is fixedly mounted on the bottom of the embedded disk 510 and is slidably connected to the curved carbon rod 509. When the rotating shaft 405 rotates, it drives the embedded disk 510 to rotate within the sealing cover 508, causing the contact 511 to slide on the curved carbon rod 509. The arc-shaped carbon rod 509 and the contact 511 are connected in series within 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 portion of the arc-shaped carbon rod 509 connected to the circuit, it is possible to detect whether the contact 511 is sliding on the arc-shaped carbon rod 509, and thus to detect whether the shaft 405 is rotating.

[0034] See also Figure 10 The reset assembly 700 includes two fixed covers 701 fixedly mounted on the bottom of the upper support plate 300, a vortex disk 702 is rotatably connected inside the fixed cover 701, four sets of slide grooves 703 are arranged in an array at the bottom of the fixed cover 701, a slider three 704 is slidably connected in the slide groove 703, an inner support rod 705 is fixedly mounted on the bottom of the slider three 704, a collar 706 is fixedly mounted on 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 vortex disk 702, and 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 and the axis of the fixed cover 701 will be offset; through the rotation of the vortex plate 702, the four groups of sliders 704 are driven to move outward along the four groups of slide 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 and the axis of the fixed cover 701 coincide with each other again, so that the relative position of the lower support plate 200 and the upper support plate 300 is restored to the initial state.

[0035] See also Figure 11 The reset drive component 800 includes a slide bar 801, which is arranged along the length direction of the upper support plate 300. Two guide grooves 802 are provided 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 cross section of the fixing button 803 is T-shaped. The slide bar 801 is slidably connected to the fixing button 803 through the guide groove 802. The fixing button 803 and the guide groove 802 cooperate to guide the moving path of the slide bar 801.

[0036] Rack plates 804 are provided on the rear sides of both ends of the slide bar 801. A connecting shaft 805 is fixedly installed at the center of the top of the scroll plate 702. The connecting shaft 805 passes through and is rotatably connected to the upper support plate 300. A gear 806 is fixedly installed on the top of the connecting shaft 805, and the gear 806 is engaged with the rack plate 804. The slide bar 801 moves along the length direction of the upper support plate 300, driving the gear 806 to rotate, thereby driving the connecting shaft 805 and the scroll plate 702 to rotate.

[0037] A motor 807 is fixedly mounted on the top of the upper support plate 300. The output end of the motor 807 is connected to a threaded rod 808. A lug 809 is fixedly mounted in the middle of the slide bar 801. 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 driving the lug 809 and the slide bar 801 to move along the length of the upper support plate 300.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-collision protection mechanism for the front of an unmanned forklift, comprising an anti-collision shell (100), characterized in that: A lower support plate (200) is fixedly mounted on the inner side of the anti-collision shell (100), an upper support plate (300) is fixedly mounted on the front of the forklift, the upper support plate (300) is located above the lower support plate (200), a movable guide member (400), a collision detection member (500) and a reset assembly (700) are provided between the lower support plate (200) and the upper support plate (300), and a reset driving member (800) is provided on the top of the upper support plate (300); The reset assembly (700) includes two fixed covers (701) fixedly mounted on the bottom of the upper support plate (300), a vortex disk (702) is rotatably connected inside the fixed cover (701), four groups of slide grooves (703) are arranged in an array at the bottom of the fixed cover (701), a slider three (704) is slidably connected inside the slide groove (703), an inner support rod (705) is fixedly mounted on the bottom of the slider three (704), a collar (706) is fixedly mounted on 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 vortex disk (702), and the inner support rod (705) is located inside the collar (706).

2. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 1 is characterized in that: The movable guide member (400) comprises 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), wherein the sliders (402) are slidably connected to the linear slide rails (401).

3. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 1 is characterized in that: The movable guide member (400) comprises two trays (403) fixedly mounted on the top of the lower support plate (200), a fan-shaped groove (404) is provided on the top of the tray (403), a rotating shaft (405) is passed through the center of the tray (403) and is rotatably connected, a rotating arm (406) is fixedly mounted on the top of the rotating shaft (405), a connecting column (407) is fixedly mounted on the top of one end of the rotating arm (406) away from the rotating shaft (405), the connecting column (407) has a T-shaped cross section, and a second slider (408) is rotatably connected to the outer side of the connecting column (407); Two guide frames (409) are fixedly installed at the bottom of the upper support plate (300), the second slider (408) is slidably connected to the inside of the guide frame (409), and a spring (410) is fixedly installed between the left and right side walls of the guide frame (409) and the second slider (408), and the bottom end of the rotating shaft (405) is connected to an elastic member; Damping components (600) are provided on both sides of the second slider (408).

4. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 3 is characterized in that: The elastic member comprises two support frames (411) fixedly mounted on the bottom of the lower support plate (200), each support frame (411) is slidably connected to a slide seat (412), a pressure plate (413) is fixedly mounted on opposite ends of the two slide seats (412), an L-shaped plate (414) is provided on the left and right sides of the pressure plate (413), the L-shaped plate (414) is fixedly mounted on the bottom of the lower support plate (200), and a second spring (415) is fixedly mounted between the L-shaped plate (414) and the pressure plate (413); A compensation frame (416) is fixedly mounted on opposite ends of the two slides (412), a turntable (417) is fixedly mounted on the bottom end of the rotating shaft (405), a push column (418) is fixedly mounted on the bottom edge of the turntable (417), and the push column (418) is slidably connected in the compensation frame (416).

5. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 3 is characterized in that: The damping assembly (600) includes two slide bars (601) fixedly mounted on the left and right sides of the second slide bar (408), the slide bars (601) are slidably connected to the guide frame (409), a fixed plate (602) is fixedly mounted on one end of the slide bar (601) away from the second slide bar (408), a piston rod (603) is fixedly mounted on one end of the fixed plate (602) away from the slide bar (601), a piston column (604) is fixedly mounted between the opposite ends of the two piston rods (603), spiral grooves (605) are arranged in an array on the circumferential surface of the piston column (604), and the spiral grooves (605) are connected to the two ends of the piston column (604), a piston cylinder (606) is fixedly mounted on 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).

6. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 2 is characterized in that: The collision detection member (500) includes a trigger plate (501) fixedly mounted on the front side of the top of the lower support plate (200); a bracket (502) is rotatably connected to the top of the upper support plate (300); a travel switch (503) is fixedly mounted on the left end of the bracket (502); the travel switch (503) is located on the rear side of the trigger plate (501); a tension spring (504) is connected to the right end of the bracket (502); an end of the tension spring (504) away from the bracket (502) is fixedly mounted on the top of the upper support plate (300); a limit plate (505) is fixedly mounted on the top of the upper support plate (300); and the limit plate (505) is attached to the rear side of the right half of the bracket (502).

7. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 5 is characterized in that: The collision detection member (500) comprises an arched seat (506) fixedly mounted at the bottom center of the upper supporting plate (300), a distance sensor (507) fixedly mounted at the bottom of the arched seat (506), and the distance sensor (507) faces the fixed plate (602).

8. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 7 is characterized in that: The collision detection member (500) further includes a sealing cover (508) fixedly mounted on the bottom of the lower support plate (200), an arc-shaped carbon rod (509) fixedly mounted on the bottom wall of the sealing cover (508), a rotating shaft (405) passing through and rotatably connected to the center of the sealing cover (508), an embedded disk (510) fixedly mounted on the circumferential surface of the rotating shaft (405), the embedded disk (510) rotatably connected to the inside of the sealing cover (508), a contact (511) fixedly mounted on the bottom of the embedded disk (510), and the contact (511) slidably connected to the arc-shaped carbon rod (509).

9. The anti-collision protection mechanism for the front of an unmanned forklift according to claim 1 is characterized in that: The reset drive member (800) includes a slide bar (801), two guide grooves (802) are provided on the surface of the slide bar (801), two fixing buttons (803) are fixedly installed on the top of the upper support plate (300), and the cross section of the fixing button (803) is T-shaped. The slide bar (801) is slidably connected to the fixing button (803) through the guide groove (802), and rack plates (804) are provided on the rear sides of both ends of the slide bar (801). A connecting shaft (805) is fixedly installed at the center of the top of the vortex disk (702), and the connecting shaft (805) is rotatably connected to the upper support plate (300). A gear (806) is fixedly installed on the top of the connecting shaft (805), and the gear (806) is meshed with the rack plate (804); A motor (807) is fixedly mounted on the top of the upper support plate (300), and a threaded rod (808) is connected to the output end of the motor (807). A lug (809) is fixedly mounted on the middle of the slide bar (801), and the lug (809) is threadedly connected to the threaded rod (808).

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