CN116425085A

CN116425085A - Fork truck with safety protection function

Info

Publication number: CN116425085A
Application number: CN202310698537.9A
Authority: CN
Inventors: 李俊; 王亮; 许小涛; 张学义; 徐永祥; 杨发亮; 冯冲; 许振刚; 王庆飞
Original assignee: Henan Yuanfa Special Vehicle Group Co ltd
Current assignee: Henan Yuanfa Special Vehicle Group Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2023-07-14
Anticipated expiration: 2043-06-14
Also published as: CN116425085B

Abstract

The invention discloses a forklift truck with a safety protection function, which relates to the technical field of forklifts and comprises a forklift chassis, a maintenance and stability assembly, a lifting assembly, an electromagnetic locking assembly and a hydraulic rod, wherein the lifting assembly is arranged in a portal frame, the electromagnetic locking assembly and the lifting assembly are both arranged above the forklift chassis, and the hydraulic rod is arranged between the lifting assembly and the forklift chassis. According to the invention, the forklift chassis is arranged and comprises the fixed frame, one side of the fixed frame is provided with the movable frame capable of sliding horizontally, the movable frame can be pushed out by the forklift in the process of lifting cargoes, the bottom end of the movable frame is provided with the supporting wheels, the length of the forklift chassis is prolonged after the movable frame is pushed out, and when the forklift has a forward tilting trend due to lifting cargoes, the supporting wheels are matched with the movable frame, so that the supporting effect on the forklift can be realized, and the situation that the forklift tilts is avoided.

Description

Fork truck with safety protection function

Technical Field

The invention relates to the technical field of forklifts, in particular to a forklift with a safety protection function.

Background

Fork trucks are industrial transportation vehicles, and are various wheeled transportation vehicles that perform handling, stacking, and short-distance transportation operations on pallet goods. The International organization for standardization ISO/TC110 is referred to as an industrial vehicle. The technical parameters of the forklift are used for indicating the structural characteristics and the working performance of the forklift. The main technical parameters are as follows: rated lifting capacity, load center distance, maximum lifting height, portal inclination angle, maximum running speed, minimum turning radius, minimum ground clearance, wheelbase and the like.

Application number: CN201910851974.3, a forklift is disclosed, and the frame is provided with a containing groove which is open towards the upper side; the door frame is rotatably arranged on the frame; the cab is arranged on the portal and is positioned at the rear of the portal; the driving device is used for driving the portal to rotate between the first position and the second position, when the portal is in the second position, the portal is vertically arranged, when the portal is in the first position, the portal is horizontally arranged and the cab is accommodated in the accommodating groove, therefore, the portal can be reclined by 90 degrees, the portal is adjusted to be parallel to the ground from the ground perpendicular state, the length and the height direction of the forklift can be reduced on the one hand, the transportation space of the forklift is reduced, and on the other hand, the center of gravity of goods can be positioned in the middle of front wheels and rear wheels of the forklift when the forklift is in the working state, and the stability of the forklift is improved.

According to the technical scheme, although the gravity center position of the forklift can be changed, so that the forklift can maintain stability during running, in the actual running process, due to the inclination of the portal frame, the gravity center of a driver can be changed, so that the psychological pressure of the driver is increased, and driving accidents can be possibly caused in serious cases.

Therefore, it is necessary to invent a forklift truck with a safety protection function to solve the above problems.

Disclosure of Invention

The invention aims to provide a forklift with a safety protection function, which solves the technical problem that the forklift loses stability and tips forward due to overlarge moment generated on a front wheel supporting point because of overlarge gravity center or overload of cargoes during operation.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the forklift truck with the safety protection function comprises a truck frame, wherein a forklift chassis is arranged at the bottom of the truck frame, a hydraulic rod fixedly connected with the top of the forklift chassis is arranged on the side edge of the truck frame, a maintenance and stability assembly is arranged in the forklift chassis, a portal is fixedly connected to the top of the forklift chassis, a lifting assembly is arranged on the outer side of the portal, and an electromagnetic locking assembly is arranged in the portal; a sliding rheostat which is contacted with the electromagnetic locking component is buried in the portal; the forklift chassis comprises a fixing frame, and a fixing frame is fixedly arranged at one end of the fixing frame; the maintenance and stabilization assembly comprises a movable frame which is arranged inside a fixed frame in a penetrating manner, two supporting wheels are arranged at one end of the lower surface of the movable frame, a connecting rod is fixedly arranged at the other end of the movable frame, sliding blocks are fixedly arranged at two ends of the connecting rod, sliding grooves matched with the sliding blocks are formed in the inner walls of two sides of the fixed frame, movable arms are movably arranged at two ends of the connecting rod through pin shafts, a sliding seat is movably arranged at the bottom end of each movable arm through a pin shaft, and a driving assembly is arranged inside each sliding seat; the movable frame comprises a first connecting frame connected with two supporting wheels, leaf spring pieces are fixedly connected to two ends of the first connecting frame, and two second connecting frames connected with connecting rods are connected to one ends, away from the connecting frames, of the leaf spring pieces.

Dividing the movable frame into three parts, when the lifting assembly is lifted, gradually extending out of the fixed frame according to the lifting height of the lifting assembly, wherein the deformation of the reed of the upper plate of the movable frame can reflect the lifting height of the lifting assembly; the movable frame extends from the fixed frame to support the forklift body, meanwhile, along with lifting of the lifting assembly, the resistance value of the sliding rheostat buried in the portal is gradually reduced, so that the electromagnetic locking assembly device cannot be changed, meanwhile, when the lifting assembly suddenly slides from the portal, the resistance value of the sliding rheostat is gradually increased, when the lifting assembly slides to a certain distance, the electromagnetic locking assembly locks the lifting assembly, the lifting assembly is prevented from being suddenly locked at a high position, and the generated impact force enables the frame to overturn.

Preferably, the driving assembly comprises a thread groove formed in the two sliding seats, a threaded rod is arranged in the thread groove in a penetrating manner, and one end of the threaded rod is movably arranged on the inner wall of the fixing frame through a bearing; the other end of the threaded rod is fixedly provided with a driving wheel, a driving wheel is arranged between the two driving wheels, a driving belt is arranged between the driving wheel and the driving wheel, one side of the driving wheel is provided with an adjusting motor, and the adjusting motor is fixedly arranged in the fixing frame. The adjusting motor drives the driving wheel to rotate, the driving wheel drives the driving wheel to rotate through the driving belt, the driving wheel drives the threaded rod to rotate, the threaded rod is matched with the threaded groove, and the sliding block and the sliding groove are limited, so that the threaded rod can drive the sliding seat to axially slide, the sliding seat can drive the movable frame to slide through the movable arm, and the movable frame can be pushed out from the inside of the fixed frame.

Preferably, an extending groove of an inclined structure is formed in one end of the sliding groove, a positioning plate is fixedly arranged at one end of the sliding block, and the positioning plate is arranged at a notch of the sliding groove. When the sliding block slides into the inclined extending groove, the height of the movable frame is adjusted, and the supporting wheel can be separated from the ground, so that the forklift is convenient to move.

Preferably, the chute is a chute, the included angle between the chute and the bottom of the fixing frame is an acute angle, and the outer ring of the supporting wheel is provided with an expansion piece. Through setting the contained angle of spout and mount bottom to the acute angle to make the fly frame when being released from the inside of mount by the level, the supporting wheel on the fly frame takes place to contact with ground, the expansion piece that the ground set up the supporting wheel outer lane extrudes, make the expansion piece take place to deform, on the one hand promoted the supporting effect of fly frame to fork truck, on the other hand because the expansion piece takes place to deform, make the extrusion force reinforcing of fly frame and ground, thereby make the frictional force increase of supporting wheel and ground, thereby when fork truck removes, can play certain deceleration effect, further strengthened fork truck operating stability.

Preferably, the electromagnetic locking assembly comprises a through groove formed in the outer side face of the portal, the top of the through groove is rotationally connected with a locking wheel through the electromagnetic assembly, an auxiliary wheel is arranged at the bottom of the through groove, and a transmission chain is arranged between the locking wheel and the auxiliary wheel; the electromagnetic assembly comprises a supporting frame fixedly arranged at the top of the through groove, a circular groove is formed in the middle of the supporting frame in a penetrating mode, positioning rings are fixedly arranged on the inner walls of the two sides of the supporting frame, and a plurality of positioning grooves are formed in the inner side walls of the positioning rings in a surrounding mode; the middle part of locking wheel is fixed to be provided with and runs through the transfer line that sets up in circular slot inside, the inside of transfer line buries the electro-magnet with slide rheostat electric connection, the fixed extension dish that is provided with in middle part of transfer line, the outside of extension dish is provided with a plurality of fixture blocks through the round pin axle encirclement, just the fixture block sets up to arc structure, and the setting of arc structure makes the fixture block laminate in the outside of default state with the transfer line.

When lifting the assembly, the locking wheel and the auxiliary wheel are driven to rotate through the transmission belt, and meanwhile, the resistance value of the sliding rheostat buried in the portal is gradually reduced, so that magnetism generated by the electromagnet is gradually increased, the electromagnet adsorbs the clamping block, the clamping block is prevented from contacting with the positioning groove when the lifting assembly is lifted, and locking of the locking wheel is realized

Preferably, one end of the clamping block is movably connected with the outer side wall of the extension disc through a tension spring, a positioning block is fixedly arranged at one end of the clamping block, and the positioning block is matched with the positioning groove. When the lifting assembly suddenly falls, the resistance value of the sliding rheostat buried in the portal is gradually increased, the electromagnet loses the adsorption to the clamping block, the clamping block is thrown outwards due to the action of centrifugal force, the positioning block can be inserted into the positioning groove, the clamping block can be clamped in the positioning ring, and the braking to the transmission rod and the locking wheel can be realized.

Preferably, the lifting assembly comprises a movable seat, the movable seat is arranged on the outer side of the portal, a connecting seat is fixedly arranged on the inner side of the movable seat, and the connecting seat is fixedly arranged on the top end of the hydraulic rod; the inside face fixedly connected with of movable seat just with the movable block that slide rheostat contacted, just the movable block sets up in the inside of portal, the movable block is close to the fixed sliding frame that is provided with of one end of movable seat, just the sliding frame sets up in the inside of logical groove, the fixed rack that is provided with in one side of movable block, just the rack meshes with the drive chain mutually. The movable block can drive the transmission chain to move through the rack so as to realize transmission between the lifting assembly and the electromagnetic locking assembly.

Preferably, the outer side surface of the movable seat is fixedly provided with two forks, and the heights of the two forks are lower than the height of the connecting seat. The fork can realize carrying the goods, and has certain difference in height between fork and the connecting seat to guarantee that the fork can fall on ground.

Preferably, the inside bottom of fixed frame is provided with a plurality of supporting rollers that contact with the movable frame surface, the outside four corners department of mount all is provided with the walking wheel. The support roller is convenient for the sliding of the movable frame, and the travelling wheel is convenient for the movement of the forklift.

Preferably, a control terminal is arranged in the frame, a control system is arranged in the control terminal, and the control system controls electrical elements in the device.

The invention has the technical effects and advantages that:

1. according to the invention, the forklift chassis is arranged and comprises the fixed frame, one side of the fixed frame is provided with the movable frame capable of sliding horizontally, the movable frame can be pushed out by the forklift in the process of lifting cargoes, the bottom end of the movable frame is provided with the supporting wheels, the length of the forklift chassis is prolonged after the movable frame is pushed out, and when the forklift has a forward tilting trend due to lifting cargoes, the supporting wheels are matched with the movable frame, so that the supporting effect on the forklift can be realized, and the situation that the forklift tilts is avoided.

According to the invention, the electromagnetic locking assembly and the lifting assembly are arranged, the lifting assembly can move up and down in the portal, the transmission chain is arranged in the through groove, the lifting assembly can drive the transmission rod to rotate through the transmission chain in the moving process, the clamping blocks arranged on the outer side of the transmission rod are outwards opened under the action of centrifugal force when the hydraulic rod fails, so that the positions of the transmission rod and the transmission chain can be locked, and the lifting assembly and the cargo can be locked at the same time, so that the potential safety hazard caused by falling of the cargo is avoided.

According to the invention, the fork truck chassis is arranged, the threaded rod is arranged in the fork truck chassis and driven by the adjusting motor, the sliding seat is arranged in the fork truck chassis, the threaded groove matched with the threaded rod is formed in the sliding seat, when the lifting assembly is lifted upwards, the adjusting motor can drive the threaded rod to rotate, and the threaded rod is matched with the threaded groove, so that the sliding seat drives the movable frame to push outwards, and therefore, the movable frame can be automatically pushed out and retracted, and the fork truck is convenient to use.

According to the invention, the movable frame and the electromagnet are arranged, when the lifting assembly is lifted, the movable frame gradually extends out of the fixed frame according to the lifting height of the lifting assembly to support the forklift body, meanwhile, as the lifting assembly is lifted, the embedded sliding rheostat in the portal drives the electromagnetic locking assembly device not to do not move, and meanwhile, when the lifting assembly suddenly slides down from the inside of the portal, the sliding rheostat drives the electromagnetic locking assembly to lock the lifting assembly, so that the sudden locking of the lifting assembly at a high position is avoided, and the generated impact force causes the overturning accident of the forklift frame.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic view of a forklift chassis according to the present invention.

Fig. 3 is a schematic view of a movable frame structure according to the present invention.

Fig. 4 is a schematic side view of the structure of the fixing frame of the present invention.

Fig. 5 is a schematic diagram of the structure of the driving wheel of the present invention.

Fig. 6 is a schematic view of the structure of the support assembly and the lifting assembly of the present invention.

Fig. 7 is a schematic structural view of a lifting assembly according to the present invention.

FIG. 8 is a schematic cross-sectional view of a support assembly of the present invention.

Fig. 9 is an enlarged schematic view of the structure of fig. 8 a according to the present invention.

Fig. 10 is a schematic view of a supporting frame structure according to the present invention.

FIG. 11 is a schematic view of a retaining ring according to the present invention.

Fig. 12 is a schematic cross-sectional view of a supporting frame structure according to the present invention.

Fig. 13 is a schematic view of the locking wheel structure of the present invention.

In the figure: 1. a frame; 2. a forklift chassis; 201. a fixing frame; 202. a fixed frame; 3. a hydraulic rod; 4. a dimensional stability component; 401. a movable frame; 402. a support wheel; 403. a connecting rod; 404. a slide block; 405. a chute; 406. a movable arm; 407. a slide; 4011. a first connection frame; 4012. a plate reed; 4013. a second connecting frame; 5. a door frame; 6. a lifting assembly; 601. a movable seat; 602. a connecting seat; 603. a movable block; 604. a sliding frame; 605. a rack; 606. a fork; 7. an electromagnetic locking assembly; 701. a through groove; 702. a locking wheel; 703. an auxiliary wheel; 704. a drive chain; 8. a drive assembly; 801. a thread groove; 802. a threaded rod; 803. a driving wheel; 804. a driving wheel; 805. a transmission belt; 9. an extension groove; 10. a positioning plate; 11. an electromagnetic assembly; 1101. a support frame; 1102. a circular groove; 1103. a positioning ring; 1104. a positioning groove; 1105. a transmission rod; 1106. an electromagnet; 1107. an extension tray; 1108. a clamping block; 1109. a tension spring; 1110. a positioning block; 12. supporting rollers; 13. and a walking wheel.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1 to 13, a forklift truck with a safety protection function comprises a frame 1, wherein a forklift chassis 2 is arranged at the bottom of the frame 1, a hydraulic rod 3 fixedly connected with the top of the forklift chassis 2 is arranged on the side edge of the frame 1, a maintenance and stability assembly 4 is arranged in the forklift chassis 2, a portal 5 is fixedly connected to the top of the forklift chassis 2, a lifting assembly 6 is arranged on the outer side of the portal 5, and an electromagnetic locking assembly 7 is arranged in the portal 5; the forklift chassis 2 comprises a fixed frame 201, and a fixed frame 202 is fixedly arranged at one end of the fixed frame 201; the dimension steady subassembly 4 is including running through the movable frame 401 that sets up inside fixed frame 202, the lower surface one end of movable frame 401 is provided with two supporting wheels 402, supporting wheels 402 set up to the universal wheel, the other end of movable frame 401 is fixed to be provided with connecting rod 403, the both ends of connecting rod 403 are all fixed to be provided with slider 404, the spout 405 with slider 404 looks adaptation has all been seted up to the both sides inner wall of mount 201, the both ends of connecting rod 403 all are provided with the expansion arm 406 through the round pin axle activity, the bottom of expansion arm 406 is provided with slide 407 through the round pin axle activity, the inside of slide 407 is equipped with actuating assembly 8. The movable arm 406 is provided so that a certain height difference can be generated between the slide 407 and the connecting rod 403, so as to ensure that the movable frame 401 can be lifted upwards during the process of storage.

Specifically, the driving assembly 8 includes a threaded groove 801 formed inside the two sliding seats 407, a threaded rod 802 is disposed inside the threaded groove 801 in a penetrating manner, and one end of the threaded rod 802 is movably disposed on the inner wall of the fixing frame 201 through a bearing; the other end of the threaded rod 802 is fixedly provided with a driving wheel 803, a driving wheel 804 is arranged between the two driving wheels 803, a driving belt 805 is arranged between the driving wheel 803 and the driving wheel 804, one side of the driving wheel 804 is provided with an adjusting motor, and the adjusting motor is fixedly arranged in the fixing frame 201. The adjusting motor drives the driving wheel 804 to rotate, the driving wheel 804 drives the driving wheel 803 to rotate through the driving belt 805, the driving wheel 803 drives the threaded rod 802 to rotate, the threaded rod 802 and the threaded groove 801 are matched, and the sliding block 404 and the sliding groove 405 are limited, so that the threaded rod 802 can drive the sliding seat 407 to axially slide, the sliding seat 407 can drive the movable frame 401 to slide through the movable arm 406, and the movable frame 401 can be pushed out from the inside of the fixed frame 201.

Specifically, an extending groove 9 with an inclined structure is formed at one end of the chute 405, a positioning plate 10 is fixedly arranged at one end of the slider 404, and the positioning plate 10 is arranged at a notch of the chute 405. When the slider 404 slides into the inclined extension groove 9, the height of the movable frame 401 is adjusted, and the supporting wheel 402 can be separated from the ground, so that the forklift can be conveniently moved.

Specifically, the chute 405 is a chute, an included angle between the chute 405 and the bottom of the fixing frame 201 is an acute angle, and an expansion member is arranged on the outer ring of the supporting wheel 402. Through setting the contained angle of spout 405 and mount 201 bottom to the acute angle to make movable frame 401 when being released from the inside of mount 201 by the level, the supporting wheel 402 on the movable frame 401 takes place to contact with ground, the expansion member that the ground set up the supporting wheel 402 outer lane extrudes, make the expansion member take place to deform, promoted the supporting effect of movable frame 401 to fork truck on the one hand, on the other hand because the expansion member takes place to deform, make the extrusion force reinforcing of movable frame 401 and ground, thereby make the frictional force increase of supporting wheel 402 and ground, thereby when fork truck removes, can play certain deceleration effect, further strengthened fork truck operating stability.

Specifically, the electromagnetic locking assembly 7 comprises a through groove 701 formed in the outer side surface of the portal 5, a locking wheel 702 is rotatably connected to the top of the through groove 701 through an electromagnetic assembly 11, an auxiliary wheel 703 is arranged at the bottom of the through groove 701, and a transmission chain 704 is arranged between the locking wheel 702 and the auxiliary wheel 703; the electromagnetic assembly 11 comprises a supporting frame 1101 fixedly arranged at the top of the through groove 701, a circular groove 1102 is formed in the middle of the supporting frame 1101 in a penetrating manner, positioning rings 1103 are fixedly arranged on the inner walls of two sides of the supporting frame 1101, and a plurality of positioning grooves 1104 are formed in the inner side walls of the positioning rings 1103 in a surrounding manner; the middle part of the locking wheel 702 is fixedly provided with a transmission rod 1105 penetrating through the inside of the circular groove 1102, the middle part of the transmission rod 1105 is fixedly provided with an extension disc 1107, the outer side of the extension disc 1107 is provided with a plurality of clamping blocks 1108 in a surrounding mode through a pin shaft, the clamping blocks 1108 are of an arc-shaped structure, and the clamping blocks 1108 can be attached to the outer side of the transmission rod 1105 in a default state due to the arrangement of the arc-shaped structure; one end of the clamping block 1108 is movably connected with the outer side wall of the extension plate 1107 through a tension spring 1109, and one end of the clamping block 1108 is fixedly provided with a positioning block 1110, and the positioning block 1110 is matched with the positioning groove 1104. When the clamping block 1108 is thrown outwards due to the action of centrifugal force, the positioning block 1110 can be inserted into the positioning groove 1104, at this time, the clamping block 1108 can be clamped in the positioning ring 1103, and at this time, the braking of the transmission rod 1105 and the locking wheel 702 can be realized.

Specifically, the lifting assembly 6 comprises a movable seat 601, the movable seat 601 is arranged on the outer side of the portal 5, a connecting seat 602 is fixedly arranged on the inner side of the movable seat 601, and the connecting seat 602 is fixedly arranged on the top end of the hydraulic rod 3; the inside surface of movable seat 601 is fixed and is provided with two movable blocks 603, and movable block 603 sets up in the inside of portal 5, and movable block 603 is close to the fixed sliding frame 604 that is provided with of one end of movable seat 601, and sliding frame 604 sets up in the inside of logical groove 701, and one side of movable block 603 is fixed and is provided with rack 605, and rack 605 meshes with drive chain 704. The movable block 603 can drive the transmission chain 704 to move through the rack 605 so as to realize transmission between the lifting assembly 6 and the electromagnetic locking assembly 7.

Specifically, the outer side surface of the movable seat 601 is fixedly provided with two forks 606, and the height of the two forks 606 is lower than that of the connecting seat 602. The fork 606 can carry goods, and a certain height difference exists between the fork 606 and the connecting seat 602, so that the fork 606 can fall on the ground.

Specifically, the bottom end inside the fixed frame 202 is provided with a plurality of supporting rollers 12 contacting with the outer surface of the movable frame 401, and four corners of the outer side of the fixed frame 201 are provided with travelling wheels 13. The support roller 12 facilitates the sliding of the movable frame 401, and the travelling wheel 13 facilitates the movement of the forklift.

Specifically, the inside of the frame 1 is provided with a control terminal, the inside of the control terminal is provided with a control system, and the control system controls electrical elements in the device.

To sum up, this device when using, fork truck chassis 2 can drive frame 1 and remove, and it can fork the goods to rise subassembly 6 to realize the lifting of goods through hydraulic stem 3, at this in-process, fork truck chassis 2 can realize the expansion of length, avoid the device to empty with hoisting device's stability, simultaneously, rise subassembly 6 and rise the in-process, steady subassembly 4 can play to rise the protection of falling of subassembly 6 to the stability of device working process.

When the goods are lifted, the lifting assembly 6 can drive the threaded rod 802 to rotate through the driving wheel 804 and the driving wheel 803, the threaded rod 802 is matched with the threaded groove 801, the sliding seat 407 slides, the sliding seat 407 can drive the movable frame 401 to slide through the movable arm 406, the movable frame 401 is pushed out of the fixed frame 201, the movable frame 401 can play a role in expanding the forklift chassis 2 after being pushed out, when the forklift has a forward tilting trend due to lifting of the goods, the supporting wheel 402 is matched with the movable frame 401, the supporting effect on the forklift can be achieved, the situation that the forklift falls is avoided, the lifting assembly 6 can slide in the direction of the driving wheel 804 through the adjusting motor in the falling process, the movable frame 401 can be retracted, when the movable frame 401 is retracted to a certain extent, the sliding block 404 slides into the inclined extending groove 9, the height of the movable frame 401 is adjusted, and at the moment, the supporting wheel 402 is separated from the ground, so that the forklift is convenient to move, meanwhile, the retracted movable frame 401 cannot influence on the falling of the lifting assembly 6, and the fork 606 in the lifting assembly 6 is convenient to move to the lowest point.

In the process of movement of the lifting assembly 6, the movable block 603 slides in the portal 5, the movable block 603 drives the transmission chain 704 to move through the rack 605, the transmission chain 704 can drive the locking wheel 702 and the auxiliary wheel 703 to rotate, the locking wheel 702 drives the transmission rod 1105 to rotate, the transmission rod 1105 drives the plurality of clamping blocks 1108 to rotate through the extension disc 1107, when the lifting assembly 6 moves normally, the locking wheel 702 and the transmission rod 1105 rotate slowly, the clamping blocks 1108 are tightly attached to the outer side of the transmission rod 1105 under the action of the tension spring 1109, when the hydraulic rod 3 fails to enable the lifting assembly 6 to fall down quickly, the lifting assembly 6 drives the transmission chain 704 to move quickly, the transmission chain 704 drives the locking wheel 702 to rotate quickly, the locking wheel 702 drives the clamping blocks 1108 to rotate quickly through the transmission rod 1105, the clamping blocks 1108 are thrown outwards under the action of centrifugal force, at the moment, the positioning blocks 1110 at one end of the clamping blocks 1108 are inserted into the positioning grooves 1104, at the moment, the positions between the transmission rod 1105 and the positioning rings 1103 are fixed, the transmission rod 1105 cannot rotate, the clamping blocks can realize the lifting of the transmission rod 1105 through the locking wheel 1105 to the transmission chain 704, and the braking assembly 704 can realize braking of the braking assembly 603 through the braking assembly 6.

Example two

Based on the first embodiment, although the stable lifting of the forklift is realized by using the stabilizing component 4 and the electromagnetic locking component 7, meanwhile, the stabilizing component 4 cannot adaptively adjust according to the weight and the height of the goods forked by the lifting component 6 when the lifting component 6 performs the fork assembly operation, so that each time the lifting component 6 performs the fork assembly operation, the stabilizing component 4 extends out of the fixing frame 201, thereby obviously reducing the working efficiency of the forklift, and meanwhile, when the lifting component 6 suddenly slides from a high place, if the electromagnetic locking component 7 directly locks the lifting component 6 at the high place, the impact force of the goods on the lifting component 6 on the forklift still can cause the possibility of tipping.

As shown in fig. 3 and 12, a slide rheostat contacting with the electromagnetic locking assembly 7 is embedded in the portal 5; the movable frame 401 comprises a first connecting frame 4011 connected with two supporting wheels 402, two ends of the first connecting frame 4011 are fixedly connected with plate spring pieces 4012, and one ends of the two plate spring pieces 4012 far away from the connecting frame are commonly connected with a second connecting frame 4013 connected with a connecting rod 403; an electromagnet 1106 electrically connected to the slide rheostat is embedded in the transmission rod 1105.

Dividing the movable frame 401 into three parts, when the lifting assembly 6 is lifted, the movable frame 401 gradually extends out of the fixed frame 201 according to the lifting height of the lifting assembly 6, and the deformation amount of the plate spring 4012 on the movable frame 401 can reflect the lifting height of the lifting assembly 6; the movable frame 401 extends out of the fixed frame 201 to support the frame 1, and simultaneously, along with lifting of the lifting assembly 6, the resistance value of the sliding rheostat embedded in the portal 5 is gradually reduced, so that magnetism generated by the electromagnet 1106 embedded in the transmission rod 1105 is gradually increased, and the electromagnet 1106 adsorbs the clamping block 1108 to prevent the clamping block 1108 from contacting the positioning groove 1104 when the lifting assembly 6 is lifted; when the lifting assembly 6 suddenly slides down from the inside of the portal 5, the resistance value of the sliding rheostat is gradually increased, so that magnetism generated by the electromagnet 1106 embedded in the inside of the transmission rod 1105 is gradually reduced, when the lifting assembly 6 slides down to a certain distance, the electromagnet 1106 loses the adsorption to the clamping block 1108, the clamping block 1108 is thrown outwards under the action of centrifugal force, the positioning block 1110 can be inserted into the positioning groove 1104, at the moment, the clamping block 1108 can be clamped in the positioning ring 1103, at the moment, the braking on the transmission rod 1105 and the locking wheel 702 can be realized, the phenomenon that the frame 1 is tilted due to the generated impact force is avoided, and the lifting assembly 6 is suddenly locked at a high position.

When the device is used, an operator sits in the frame 1, a forklift is started, the travelling wheel 13 drives the forklift chassis 2 to move beside a cargo to be carried, the operator operates the fork 606 on the forklift and inserts the fork 606 into the bottom of the cargo, then the hydraulic rod 3 is controlled to extend, the top of the hydraulic rod 3 jacks up the connecting seat 602, and the connecting seat 602 is in sliding connection with the through groove 701 through the sliding frame 604 and the movable block 603, so that when the connecting seat 602 drives the fork 606 to lift up through the movable seat 601, the sliding frame 604 slides upwards along the inner side of the through groove 701, and the phenomenon that dislocation can not occur between the connecting seat 602 and the door frame 5 when the fork 606 lifts up is ensured; meanwhile, as the racks 605 on the movable block 603 are in a meshed state with the transmission chain 704 between the locking wheel 702 and the auxiliary wheel 703, the movable block 603 synchronously drives the transmission chain 704 to move through the racks 605 in the process that the connecting seat 602 drives the movable block 603 to lift upwards, and the transmission chain 704 synchronously drives the locking wheel 702 and the auxiliary wheel 703 to rotate.

Because the forklift works based on the relative weight balance of two sides of a fulcrum, after the forklift lifts the goods, the weight of the front half part of the forklift is increased along with the lifting of the goods, and the gravity center of the forklift is deviated at the moment, so that the longitudinal stability of the forklift is possibly reduced; therefore, in the process that the hydraulic rod 3 drives the fork 606 to lift upwards through the connecting seat 602, the control system can judge the weight of the goods forked on the fork 606 by monitoring the elongation of the hydraulic rod 3 in unit time; and the lifting height of the goods can be obtained by detecting the total elongation of the free end of the hydraulic rod 3; judging whether the maintenance and stabilization assembly 4 acts or not through the weight and the lifting height of the goods, and if the weight and the lifting height of the goods do not exceed the set values, the maintenance and stabilization assembly 4 and the driving assembly 8 do not act at the moment, so that the fork loading efficiency of the forklift is improved; if the weight and lifting height of the goods exceed the set values, the control system starts the adjusting motor to adjust the driving wheel 804 to rotate, the driving wheel 804 drives the driving wheel 803 to operate through the driving belt 805, the driving wheel 803 drives the sliding seat 407 to move towards the fixed frame 202 along the sliding groove 405 through the rotation of the threaded rod 802, the sliding seat 407 drives the movable frame 401 to push out from the inside of the fixed frame 201 through the movable arm 406, the movable frame 401 can play a role of expanding the forklift chassis 2 after being pushed out, and therefore the longitudinal stability of the forklift is improved, meanwhile, because an included angle between the sliding groove 405 and the bottom of the fixed frame 201 is an acute angle, when the movable frame 401 is pushed out horizontally from the inside of the fixed frame 201, the supporting wheel 402 on the movable frame 401 is in contact with the ground, the expansion piece arranged on the outer ring of the supporting wheel 402 is extruded, so that the expansion piece deforms (the expansion piece is a rubber layer or a silica gel layer coated on the supporting wheel 402), on one hand, and on the other hand, the supporting effect of the movable frame 401 on the forklift is improved, and the extrusion force between the movable frame 401 and the ground is enhanced, so that the forklift and the forklift can further transversely run under the condition of enhancing the action.

Simultaneously, the movable seat 601 drives the fork 606 to lift upwards through the connecting seat 602 and simultaneously drives the movable block 603 to move upwards along the through groove 701, as the sliding rheostat is buried in the door frame 5, and as one end of the sliding rheostat is electrically connected with an external power supply, the other end of the sliding rheostat is connected with the electromagnet 1106, so that when the movable seat 601 drives the movable block 603 to move upwards, the movable block 603 is equivalent to a sliding sheet on the sliding rheostat due to the contact of the movable block 603 with the sliding rheostat, the resistance value of the sliding rheostat gradually decreases in the upward movement process of the movable block 603, the current applied by the external power supply to the electromagnet 1106 gradually increases, the magnetic attraction generated by the electromagnet 1106 increases, after the magnetic attraction of the electromagnet 1106 increases, the clamping block 1108 on the extension disc 1107 is magnetically adsorbed on one hand, therefore, the phenomenon that the locking wheel 702 and the auxiliary wheel 703 are driven by the racks 605 on the movable block 603 to rotate by the locking wheel 702 synchronously drives the transmission rod 1105 in the running process of the locking wheel 704, so that the locking block 1108 can be inserted into the positioning groove 1104 under the influence of centrifugal force is avoided, on the other hand, as the magnetic attraction of the electromagnet 1106 is increased, when the fork 606 rises to a certain height, the electromagnet 1106 generates magnetic attraction force on the fork 606, and micro deformation is generated from one end of the fork 606 far away from the movable seat 601 to the top of the portal 5, so that the risk of slipping of goods on the fork 606 is avoided when the fork 606 drives the goods to lift after one end of the fork 606 far away from the movable seat 601 is inclined to the ground for a certain time in long-term use; when the lifting assembly 6 is lifted upwards and the hydraulic rod 3 suddenly breaks down to cause the lifting assembly 6 to fall, at the moment, the electromagnet 1106 still has a certain magnetic attraction to the fork 606, so that the falling speed of the lifting assembly 6 is slowed down, the movable block 603 synchronously moves downwards in the falling process of the lifting assembly 6, the resistance value of the sliding rheostat is gradually increased, the electromagnet 1106 gradually loses the magnetic attraction to the fork 606 and the clamping block 1108, when the fork 606 falls to a certain extent, the electromagnet 1106 thoroughly loses the magnetic attraction to the fork 606 and the clamping block 1108, at the moment, the clamping block 1108 is thrown outwards under the centrifugal force action of the transmission rod 1105, and the positioning block 1110 at one end of the clamping block 1108 is inserted into the positioning groove 1104, so that the position between the transmission rod 1105 and the positioning ring 1103 is fixed, and further the braking of the lifting assembly 6 is realized; since the maintenance component 4 still supports the frame 1 in the descending process of the lifting component 6 caused by faults, at the moment of the braking of the lifting component 6, the impact force generated by the downward movement of the lifting component 6 is absorbed by the maintenance component 4, and meanwhile, the plate spring piece 4012 is arranged between the first connecting frame 4011 and the second connecting frame 4013, and the plate spring piece 4012 buffers and absorbs the impact force generated by the downward movement of the lifting component 6, so that the phenomenon that the frame 1 is tilted at the moment of the braking of the lifting component 6 is avoided.

It should be noted that: when the lifting assembly 6 is lifted, the movable frame 401 extends out of the fixed frame 201 according to the lifting height equal proportion of the lifting assembly 6 and forms stability for supporting the lifting frame 1 on the forklift body, in the extending process of the movable frame 401, the gravity applied to the movable frame 401 in the lifting process of the lifting assembly 6 and the goods on the fork 606 is reflected by the plate spring sheet 4012, and the lifting height of the lifting assembly 6 can be reflected according to the deformation quantity of the plate spring sheet 4012; when the lifting assembly 6 is lifted, the resistance value of the sliding rheostat embedded in the portal 5 is gradually reduced, so that the magnetic attraction force generated by the electromagnet 1106 is gradually increased, the electromagnet 1106 adsorbs the clamping block 1108, and the electromagnetic locking assembly 7 is prevented from being moved; when the lifting assembly 6 suddenly slides down from the inside of the portal 5, the resistance value of the sliding rheostat is gradually increased, the magnetism generated by the electromagnet 1106 is gradually reduced, when the lifting assembly 6 slides down to a certain distance, the electromagnet 1106 loses the adsorption to the clamping block 1108, the clamping block 1108 is thrown outwards due to the action of centrifugal force, the positioning block 1110 can be inserted into the positioning groove 1104 to complete the braking of the lifting assembly 6, the impact force generated by the lifting assembly 6 is absorbed by the leaf spring 4012 on the movable frame 401, and the phenomenon that the frame 1 is tilted at the moment generated by the braking of the lifting assembly 6 is avoided.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a forklift truck with safety protection function, includes frame, its characterized in that: the forklift truck comprises a forklift truck body, and is characterized in that a forklift truck chassis is arranged at the bottom of the forklift truck body, a hydraulic rod fixedly connected with the top of the forklift truck chassis is arranged on the side edge of the forklift truck body, a maintenance and stability assembly is arranged in the forklift truck chassis, a portal is fixedly connected to the top of the forklift truck chassis, a lifting assembly is arranged on the outer side of the portal, and an electromagnetic locking assembly is arranged in the portal; a sliding rheostat which is contacted with the electromagnetic locking component is buried in the portal;

the forklift chassis comprises a fixing frame, and a fixing frame is fixedly arranged at one end of the fixing frame;

the maintenance and stabilization assembly comprises a movable frame which is arranged inside a fixed frame in a penetrating manner, two supporting wheels are arranged at one end of the lower surface of the movable frame, a connecting rod is fixedly arranged at the other end of the movable frame, sliding blocks are fixedly arranged at two ends of the connecting rod, sliding grooves matched with the sliding blocks are formed in the inner walls of two sides of the fixed frame, movable arms are movably arranged at two ends of the connecting rod through pin shafts, a sliding seat is movably arranged at the bottom end of each movable arm through a pin shaft, and a driving assembly is arranged inside each sliding seat;

the movable frame comprises a first connecting frame connected with two supporting wheels, leaf spring pieces are fixedly connected to two ends of the first connecting frame, and two second connecting frames connected with connecting rods are connected to one ends, away from the connecting frames, of the leaf spring pieces.

2. The forklift truck with a safety protection function according to claim 1, characterized in that: the driving assembly comprises thread grooves formed in the two sliding seats, a threaded rod penetrates through the thread grooves, and one end of the threaded rod is movably arranged on the inner wall of the fixing frame through a bearing; the other end of the threaded rod is fixedly provided with a driving wheel, a driving wheel is arranged between the two driving wheels, a driving belt is arranged between the driving wheel and the driving wheel, one side of the driving wheel is provided with an adjusting motor, and the adjusting motor is fixedly arranged in the fixing frame.

3. The forklift truck with a safety protection function according to claim 2, characterized in that: the extending groove of the inclined structure is formed in one end of the sliding groove, a positioning plate is fixedly arranged at one end of the sliding block, and the positioning plate is arranged at the notch of the sliding groove.

4. The forklift truck with a safety protection function according to claim 2, characterized in that: the chute is a chute, the included angle between the chute and the bottom of the fixed frame is an acute angle, and the outer ring of the supporting wheel is provided with an expansion piece.

5. The forklift truck with a safety protection function according to claim 1, characterized in that: the electromagnetic locking assembly comprises a through groove formed in the outer side face of the portal frame, the top of the through groove is rotationally connected with a locking wheel through the electromagnetic assembly, an auxiliary wheel is arranged at the bottom of the through groove, and a transmission chain is arranged between the locking wheel and the auxiliary wheel;

the electromagnetic assembly comprises a supporting frame fixedly arranged at the top of the through groove, a circular groove is formed in the middle of the supporting frame in a penetrating mode, positioning rings are fixedly arranged on the inner walls of the two sides of the supporting frame, and a plurality of positioning grooves are formed in the inner side walls of the positioning rings in a surrounding mode;

the middle part of locking wheel is fixed to be provided with and runs through the transfer line that sets up in circular slot inside, the inside of transfer line buries the electro-magnet with slide rheostat electric connection, the fixed extension dish that is provided with in middle part of transfer line, the outside of extension dish is provided with a plurality of fixture blocks through the round pin axle encirclement, just the fixture block sets up to arc structure.

6. The forklift truck with a safety protection function according to claim 5, wherein: one end of the clamping block is movably connected with the outer side wall of the extension disc through a tension spring, a positioning block is fixedly arranged at one end of the clamping block, and the positioning block is matched with the positioning groove.

7. The forklift truck with a safety protection function according to claim 5, wherein: the lifting assembly comprises a movable seat, the movable seat is arranged on the outer side of the portal frame, a connecting seat is fixedly arranged on the inner side of the movable seat, and the connecting seat is fixedly arranged on the top end of the hydraulic rod;

the inside face fixedly connected with of movable seat just with the movable block that slide rheostat contacted, just the movable block sets up in the inside of portal, the movable block is close to the fixed sliding frame that is provided with of one end of movable seat, just the sliding frame sets up in the inside of logical groove, the fixed rack that is provided with in one side of movable block, just the rack meshes with the drive chain mutually.

8. The forklift truck with a safety protection function according to claim 7, wherein: the outer side of the movable seat is fixedly provided with two forks, and the heights of the two forks are lower than the height of the connecting seat.

9. The forklift truck with a safety protection function according to claim 1, characterized in that: the inside bottom of fixed frame is provided with a plurality of supporting rollers that contact with the movable frame surface, the outside four corners department of mount all is provided with the walking wheel.

10. The forklift truck with a safety protection function according to claim 1, characterized in that: the inside of frame is equipped with control terminal, control terminal's inside is equipped with control system, control system controls the inside electrical components of device.