CN216971905U - Forklift truck - Google Patents

Abstract

The utility model discloses a forklift, comprising: the device comprises a vehicle body, a pallet fork, a lifting device, a pressure sensing device and a controller; the lifting device is arranged on the trolley body and comprises a driving wheel and a transmission strip wound on the driving wheel, and the driving wheel is matched with the transmission strip to drive the fork to move up and down; the pressure sensing device is suitable for sensing the pressure of the transmission strip acting on the pressure sensing device in a loose state and sending a signal of the pressure to the controller, and the controller is suitable for controlling the lifting device to stop driving the fork to move downwards when receiving the signal of the pressure. Therefore, the conditions that the transmission strip falls off from the transmission wheel, the transmission strip is wound with the portal wire harness and the like can be avoided, and the safety accident of the forklift under the condition that the transmission strip is not supported by the transmission wheel is avoided.

Description

Forklift truck

Technical Field

The utility model relates to the technical field of forklifts, in particular to a forklift.

Background

The forklift can be applied to a plurality of scenes such as stations, docks, ports, airports or warehouses and is efficient equipment for mechanical loading and unloading, stacking and short-distance transportation. When placing the goods, need fork truck's fork to go up and down in order to go up and down the transport. However, in the related art, since the position of the fork cannot be determined, the fork may continue to descend after contacting the bottom of the rack, which causes the chain to fall off from the sprocket, and affects the safety performance of the forklift.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, the utility model proposes a fork lift truck having high safety performance.

According to the embodiment of the utility model, the forklift comprises:

the device comprises a vehicle body, a pallet fork, a lifting device, a pressure sensing device and a controller;

the lifting device is arranged on the truck body and comprises a driving wheel and a transmission strip wound on the driving wheel, and the driving wheel is matched with the transmission strip to drive the fork to move downwards;

the pressure sensing device is suitable for sensing the pressure of the transmission strip acting on the pressure sensing device in a loose state and sending a signal of the pressure to the controller, and the controller is suitable for controlling the lifting device to stop driving the fork to move downwards when receiving the signal of the pressure.

According to the forklift provided by the embodiment of the utility model, the pressure sensing device and the controller are arranged, and the controller controls the lifting device to stop moving downwards when receiving a pressure signal, so that the situations that the transmission strip falls off from the transmission wheel, the transmission strip is wound with a portal wire harness and the like due to the fact that the lifting device descends continuously after the pallet fork contacts the bottom goods shelf are avoided, safety accidents caused by the fact that the forklift retreats under the condition that the transmission strip is not supported by the transmission wheel of the forklift are avoided, and the reliability and the safety of the forklift are improved.

In some embodiments, one end of the driving strip is connected with the vehicle body, and the pressure sensing device is arranged between one end of the driving strip and the vehicle body.

In some embodiments, the pressure sensing device comprises a pressure sensor.

In some embodiments, the drive wheel is a sprocket and the drive bar is a chain.

In some embodiments, the forklift further comprises: the height sensing device is arranged on the goods fork; the height sensing device is suitable for sensing a goods shelf or the distance between the height sensing device and the goods shelf and sending a signal of the goods shelf or a signal of the distance to the controller, and the controller is suitable for controlling the fork to stop moving relative to the goods shelf according to the signal of the goods shelf or the signal of the distance.

In some embodiments, the pallet fork comprises: a fork portion extending in a horizontal direction; the blocking part is connected to one end of the fork part, the blocking part extends along the vertical direction, and the height sensing device is arranged on the fork part and at least one of the blocking parts.

In some embodiments, the height sensing device is disposed at an end of the prong distal from the stop.

In some embodiments, the height sensing device is provided at the bottom of the fork.

In some embodiments, the bottom of the fork is formed with a receiving groove, and the height sensing device is disposed in the receiving groove.

In some embodiments, the forklift further comprises: the anti-collision sensing device is suitable for sensing an obstacle in the horizontal moving direction of the pallet fork and sending a signal of the obstacle to the controller, and the controller is suitable for controlling the vehicle body to stop moving when receiving the signal of the obstacle.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a side view of a forklift according to an embodiment of the present invention.

Fig. 2 is a side view of a forklift according to an embodiment of the utility model.

Fig. 3 is a side view of a partial structure of a forklift truck according to an embodiment of the utility model, in which the forks are not in contact with the bottom shelf.

Fig. 4 is a top view of a partial structure of a forklift truck according to an embodiment of the present invention, in which the forks are in contact with the bottom shelf.

Reference numerals:

a forklift 100;

a vehicle body 10;

a height sensing device 20; a pressure sensing device 30; a collision avoidance sensing device 40; a fastener 50; an oil cylinder 60;

a fork 70; a fork portion 71; a stopper portion 72; a through hole 73; the accommodation groove 74;

a lifting device 80; a transmission wheel 81; a drive bar 82; a fixed plate 90;

a cargo 200; a top shelf 300; a bottom shelf 400.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being exemplary, and a forklift according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.

The forklift 100 according to the embodiment of the present invention may include a body 10, a fork 70, a lifting device 80, a pressure sensing device 30, and a controller (not shown). The lifting device 80 is arranged on the vehicle body 10, the lifting device 80 comprises a driving wheel 81 and a driving strip 82 wound on the driving wheel 81, and the driving wheel 81 is matched with the driving strip 82 to drive the fork 70 to move up and down; the pressure sensing device 30 is adapted to sense the pressure of the driving strap 82 on the pressure sensing device 30 in the relaxed state and send a signal of the pressure to the controller, and the controller is adapted to control the lifting device 80 to stop moving the forks 70 downward when receiving the signal of the pressure.

The forks 70 of the forklift 100 are adapted to receive the goods 200, and the forklift 100 may place the goods 200 received on the forks 70 on shelves, which may be top shelves 300 located above the forks 70 or bottom shelves 400 located below the forks 70. The forks 70 are movable along the fork carriage to adjust the position of the forks according to the shape of the load 200.

As shown in fig. 1-4, the fork 70 is adapted to receive the cargo 200 thereon, and the fork 70 is movably disposed on the body 10 to move the cargo 200 up and down. The lifting device 80 is arranged on the vehicle body 10, the lifting device 80 comprises a transmission wheel 81 and a transmission strip 82 wound on the transmission wheel 81, one end of the transmission strip 82 is connected with the fork frame (not shown in the figure), and when the lifting device 80 works, the transmission wheel 81 is matched with the transmission strip 82 to drive the fork frame to move up and down, so that the forks 70 are driven to move up and down; the other end of the drive strap 82 is connected to the vehicle body 10. The lifting device 80 may further include an oil cylinder 60, and the oil cylinder 60 may drive the transmission wheel 81 to move up and down so as to drive the fork 70 to move up and down through the transmission strip 82.

As shown in fig. 3, the lifting device 80 includes a driving wheel 81 and a driving bar 82 wound around the driving wheel 81, one end of the driving bar 82 is fixedly connected to the fork carriage, and the other end of the driving bar 82 is connected to the vehicle body. The oil cylinder 60 drives the transmission wheel 81 to move upwards to drive the one end of the transmission strip 82 to move upwards, so that the fork 70 and the goods 200 arranged on the fork 70 are driven to ascend; the oil cylinder 60 drives the transmission wheel 81 to move downwards to drive the one end of the transmission strip 82 to move downwards, so that the fork 70 and the goods 200 arranged on the fork 70 are driven to descend.

The pressure sensing device 30 and the fork 70 are respectively provided at both sides of the elevating device 80. The pressure sensing device 30 can be used to sense pressure, and referring to fig. 3 and fig. 4, when the fork 70 is not in contact with the bottom shelf 400 (for example, as shown in fig. 3), the driving bar 82 is always under the pulling force generated by the fork carriage and the fork 70 (and the goods 200 when loaded), and when the driving bar 82 is not under the pulling force (for example, as shown in fig. 4), it means that the fork 70 is already in contact with the bottom shelf 400, at this time, the pressure sensing device 30 senses the gravity of the driving bar 82 itself, and the lifting device 80 can be controlled to stop descending, so as to prevent the driving bar 82 from loosening, and thus avoid the situation that the driving bar 82 is disengaged from the driving wheel 81.

According to the control assembly of the embodiment of the utility model, the pressure sensing device 30 is arranged at one end of the transmission strip 82 of the forklift 100 far away from the fork 70, and the controller in communication connection with the pressure sensing device 30 is arranged, so that the controller can control the oil cylinder 60 of the lifting device 80 to stop descending when receiving a pressure signal, thereby avoiding the situation that the transmission strip 82 falls off from the transmission wheel 81 because the lifting device 80 descends continuously after the fork 70 contacts the bottom shelf 400, avoiding the safety accident caused by the backward movement of the forklift 100 under the condition that the transmission wheel 81 does not support the transmission strip 82, avoiding the situations that the transmission strip 82 is separated from the transmission wheel 81, the transmission strip 82 is wound with a portal wire harness and the like caused by the looseness of the transmission strip 82 after the fork 70 descends and touches the bottom, and improving the reliability and safety of the forklift 100.

Specifically, when the forklift 100 is in operation, if the fork 70 does not contact the bottom shelf 400, the transmission bar 82 is under the pulling force of the fork frame and the fork 70 (possibly with the goods 200), and is in a tight state, the transmission bar 82 has no pressure on the pressure sensing device 30, after the fork 70 contacts the bottom shelf 400, the goods 200 and the fork 70 are supported by the bottom shelf 400, and the transmission bar 82 no longer receives the pulling force of the goods 200 and the fork 70, at this time, the gravity of the transmission bar 82 forms a vertical downward pressure, at this time, the pressure sensing device 30 senses the pressure applied to the pressure sensing device 30 when the transmission bar is in a loose state, a signal of the vertical downward pressure sensed by the pressure sensing device 30 is sent to the controller, and the controller controls the lifting device 80 to stop descending when receiving the signal of the pressure.

The pressure sensing device 30 can sense pressure to prevent the lifting device 80 from continuously descending after the fork 70 touches the bottom of the goods shelf, the pressure sensing device 30 has the function that after the fork 70 touches the bottom of the goods shelf, the goods 200 and the fork 70 are supported by the goods shelf, and the transmission strip 82 is not pulled by the goods 200 and the fork 70 any more, at this time, the gravity of the transmission strip 82 forms vertical downward pressure to be sensed by the pressure sensing device 30, a signal of the vertical downward pressure sensed by the pressure sensing device 30 is sent to the controller, and the controller controls the lifting device 80 to stop descending when receiving the signal of the pressure. If the pressure sensing device 30 and the controller are not used for controlling, the lifting device 80 continues to descend, which causes the transmission strip 82 to fall off from the transmission wheel 81, and the chain is not supported by the chain wheel, which is easy to cause the safety accident that the forklift moves backwards.

In some embodiments, as shown in fig. 3 and 4, one end of the driving bar 82 is connected to the vehicle body 10, and the pressure sensing device 30 is disposed between the other end of the driving bar 82 and the vehicle body 10. The vehicle body 10 may have a fixing plate 90, the other end of the driving strap 82 is fixed to the fixing plate 90, and the pressure-sensitive device 30 is located on the fixing plate 90. For example, the other ends of the pressure-sensitive devices 30 and the driving straps 82 may be connected to the fixing plate 90 by the fasteners 50, by disposing the pressure-sensitive device 30 between the above-indicated other end of the drive belt 82 and the vehicle body 10, so that the pressure sensing device 30 can obtain a pressure signal and send the signal to the controller, the controller controls the lifting device 80 to stop descending, thereby avoiding the driving strip 82 of the lifting device 80 from falling off from the driving wheel 81 due to the continuous descending of the lifting device 80 after the pallet fork 70 contacts the bottom goods shelf 400, avoiding the safety accident caused by the backward movement of the forklift 100 under the condition that the driving wheel 81 does not support the driving strip 82, meanwhile, the situation that the transmission strip 82 is separated from the transmission wheel 81, the transmission strip 82 is wound with the portal wire harness and the like due to the looseness of the transmission strip 82 after the fork 70 descends and bottoms is avoided, and the reliability and the safety of the forklift 100 are improved.

In some embodiments, as shown in fig. 2, the forklift further comprises a height sensing device 20, the height sensing device 20 being provided on said forks 70. The height sensing means 20 is adapted to sense a shelf or a distance of the height sensing means 20 from the shelf and to send a signal of the shelf or a signal of the distance to the controller, which is adapted to control the fork 70 to stop moving relative to the shelf in dependence of the signal of the shelf or the signal of the distance.

For example, the shelves may include a top shelf 300 and a bottom shelf 400, the height sensing device 20 may be used to sense the top shelf 300 or the bottom shelf 400 to prevent the top of the fork 70 or the top of the goods 200 from colliding with the top shelf 300 or the bottom of the fork 70 or the bottom of the goods 200 from colliding with the bottom shelf 400, and the pressure sensing device 30 may prevent the fork 70 from continuously contacting with the bottom shelf 400, so that by arranging the height sensing device 20 and the pressure sensing device 30, the fork 70 or the goods 200 may be prevented from colliding with the top shelf 300 or the bottom shelf 400, the safety performance of the forklift 100 is improved, and meanwhile, the lifting device 80 is prevented from continuously descending after the fork 70 is bottomed, the situation that the driving bar 82 is separated from the driving wheel 81 and the driving bar 82 is wound around the mast wire harness is avoided, and the safety of the forklift 100 is further improved.

Alternatively, the height sensing device 20 may be used to sense the distance from the preset position to the top shelf 300 or may be used to sense the distance from the preset position to the bottom shelf 400. As shown in fig. 2, when the height sensing device 20 can be used to sense the distance from the preset position to the top shelf 300, the distance value from the height sensing device 20 to the top shelf 300 can be measured, and if the measured distance value from the height sensing device 20 to the top shelf 300 is less than or equal to the preset value, that is, the distance value of the actual lifting of the fork 70 is greater than or equal to the preset distance value, at this time, the fork 70 can be controlled to stop lifting, so as to prevent the goods 200 or the forklift 100 from being damaged due to the extrusion with the top shelf 300. When the height sensing device 20 is used for measuring the distance value from the height sensing device 20 to the bottom shelf 400, the distance value from the height sensing device 20 to the bottom shelf 400 can be measured, and if the distance value from the height sensing device 20 to the bottom shelf 400 is measured to be smaller than or equal to a preset value, that is, the actual descending distance value of the fork 70 is greater than or equal to a preset distance value, at this time, the fork 70 can be controlled to stop descending, so as to prevent the fork 70 from descending continuously after bottom contact, thereby avoiding the situations that the transmission bar 82 is separated from the transmission wheel 81, the transmission bar 82 is wound with a portal wire harness and the like due to the looseness of the transmission bar 82 after the fork 70 descends and touches the bottom, and improving the safety of the forklift 100.

In some embodiments, as shown in fig. 2, the pallet fork 70 includes a fork portion 71 and a stopper portion 72, the fork portion 71 extending in a horizontal direction; the blocking portion 72 is connected to one end (e.g., a rear end as shown in fig. 2) of the fork portion 71, the blocking portion 72 extends in a vertical direction, and the height sensing device 20 is provided on at least one of the fork portion 71 and the blocking portion 72. The fork parts 71 are convenient for the fork parts 71 to hold the goods 200, so that the fork 70 can bear the goods 200 with larger volume, and the application range of the forklift 100 is enlarged. Meanwhile, the blocking portion 72 may limit the goods 200 in the front-rear direction, may prevent the goods 200 from falling off from the fork 70, improves the stability of the fork 70 when bearing the goods 200, and improves the reliability of the forklift 100. In addition, the height sensing device 20 may be disposed on at least one of the fork portion 71 and the blocking portion 72, thereby facilitating the height sensing device 20 to sense a shelf or measure a distance value, and ensuring reliability of the height sensing device 20.

In some embodiments, as shown in FIG. 2, the height sensing device 20 is disposed at an end of the prong 71 distal from the stop 72. Height-sensing device 20 can locate the one end of keeping away from fender portion 72 of fork portion 71, therefore, can prevent that height-sensing device 20 from being sheltered from by goods 200, thereby prevent that height-sensing device 20 from sensing for goods 200, or the distance numerical value that measures is height-sensing device 20 to the inefficacy of the distance numerical value of goods 200 cause, further promoted height-sensing device 20's reliability, can further prevent that fork 70 from touching when rising or falling and touching the end, further improved fork truck 100's security.

In some embodiments, as shown in FIG. 1, the height sensing device 20 is disposed at the bottom of the fork portion 71. The height sensor 20 may be disposed at the bottom of the fork portion 71, and a through hole 73 penetrating in the thickness direction may be formed on the fork portion 71, and the through hole 73 may be opposite to the height sensor 20, thereby further improving the sensing stability of the height sensor 20. The height sensing device 20 is arranged at the bottom of the fork part 71, so that the influence on the service life of the height sensing device 20 caused by the fact that the height sensing device 20 is touched when the cargo 200 is installed or disassembled can be prevented, and the reliability of the height sensing device 20 is further improved by arranging the through holes 73 corresponding to the position of the height sensing device 20.

In some embodiments, as shown in fig. 2, the bottom of the fork 71 is formed with a receiving groove 74, and the height sensing device 20 is disposed in the receiving groove 74. The accommodating groove 74 may be formed at the bottom of the fork portion 71, and the height sensing device 20 is disposed in the accommodating groove 74, thereby facilitating the installation of the height sensing device 20 and improving the installation reliability of the height sensing device 20; on the other hand, if the fork portion 71 collides with the bottom shelf 400, the bottom of the height sensing device 20 is prevented from being damaged by direct contact with the bottom shelf 400, thereby further improving the safety of the forklift 100.

Both the height sensing device 20 and the pressure sensing device 30 are in communication with the controller. The height sensing device 20 and the pressure sensing device 30 can send signals to the controller, so as to control the lifting or stopping motion of the fork 70, and prevent the fork 70 from touching or touching the bottom when lifting or descending, thereby preventing the forklift 100, the goods shelf or goods 200 from being damaged, improving the safety of the forklift 100, and simultaneously preventing the fork 70 from continuously descending after touching the bottom, thereby preventing the situation that the transmission strip 82 is separated from the transmission strip 82 due to the fact that the transmission strip 82 loses the support of the transmission wheel 81 after loosening, avoiding the safety accident caused by the winding of the transmission strip 82 and the portal wire harness of the forklift 100, and improving the safety performance of the forklift 100.

In some embodiments, as shown in fig. 2, the pressure sensing device 30 may include a pressure sensor, and the pressure sensor may obtain a stress value to determine whether the forklift 100 is in a bottom-touching state, so as to further avoid the situation that the transmission strip 82 is separated from the transmission wheel 81, the transmission strip 82 is wound around a mast wire harness of the forklift 100, and the like, and improve the reliability and the service life of the forklift 100.

In some embodiments, as shown in FIG. 2, the drive pulley 81 is a sprocket and the drive bar 82 is a chain. Set up the drive wheel 81 into the sprocket, the driving strip 82 sets up into the chain, and the transmission of sprocket, chain is effectual, and the bearing capacity of sprocket, chain is strong, and difficult atress produces deformation, so set up can realize the reciprocating of fork 70, improve the reliability and the life of drive wheel 81 and driving strip 82 to fork truck 100's reliability and life have been improved.

In some embodiments, as shown in fig. 2, the forklift 100 further comprises a pre-crash sensing device 40, the pre-crash sensing device 40 being adapted to sense an obstacle in the horizontal movement direction of the forks 70 and to send a signal of the obstacle to the controller, the controller being adapted to control the vehicle body 10 to stop moving when receiving the signal of the obstacle. The collision avoidance sensing means 40 may be disposed in the receiving groove 74 of the fork 70, and the collision avoidance sensing means 40 may be disposed at a position adjacent to the height sensing means 20, and the collision avoidance sensing means 40 may detect a position of an obstacle, and after the collision avoidance sensing means 40 detects the obstacle and transmits a signal to the controller, the controller may control the vehicle body 10 to stop moving. The collision avoidance sensing device 40 thus provided can prevent damage due to collision of the forks 70 with obstacles in the front-rear direction, improving the safety and reliability of the forklift 100.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner and are not to be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A forklift, comprising:

the device comprises a vehicle body, a pallet fork, a lifting device, a pressure sensing device and a controller;

the lifting device is arranged on the trolley body and comprises a driving wheel and a transmission strip wound on the driving wheel, and the driving wheel is matched with the transmission strip to drive the fork to move up and down;

the pressure sensing device is suitable for sensing the pressure of the transmission strip acting on the pressure sensing device in a loose state and sending a signal of the pressure to the controller, and the controller is suitable for controlling the lifting device to stop driving the fork to move downwards when receiving the signal of the pressure.

2. The lift truck of claim 1, wherein one end of said drive strip is connected to said truck body, said pressure sensing device being disposed between said one end of said drive strip and said truck body.

3. The lift truck of claim 1, wherein said pressure sensing device comprises a pressure sensor.

4. The lift truck of claim 1, wherein said drive wheels are sprockets and said drive bars are chains.

5. The lift truck of claim 1, further comprising:

the height sensing device is arranged on the goods fork; the height sensing device is suitable for sensing a goods shelf or the distance between the height sensing device and the goods shelf and sending a signal of the goods shelf or the distance signal to the controller, and the controller is suitable for controlling the fork to stop moving relative to the goods shelf according to the signal of the goods shelf or the distance signal.

6. The lift truck of claim 5, wherein the fork comprises:

a fork portion extending in a horizontal direction;

keep off the portion, keep off the portion and connect the one end of fork portion, keep off the portion and extend along vertical direction, high induction system establishes fork portion with on at least one in the fender portion.

7. A lift truck as claimed in claim 6, wherein said height sensing means is provided at an end of said forks remote from said stops.

8. The lift truck of claim 6, wherein said height sensing device is provided at the bottom of said fork portion.

9. The lift truck of claim 6, wherein a receiving slot is formed in a bottom of said fork portion, said height sensing device being disposed within said receiving slot.

10. The lift truck of any one of claims 1-9, characterized by further comprising:

the anti-collision sensing device is suitable for sensing an obstacle in the horizontal moving direction of the pallet fork and sending a signal of the obstacle to the controller, and the controller is suitable for controlling the vehicle body to stop moving when receiving the signal of the obstacle.

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