CN112978629B

CN112978629B - Forklift protection device

Info

Publication number: CN112978629B
Application number: CN202110450835.7A
Authority: CN
Inventors: 衣学航; 刘兴隆; 王瑞; 张智斌; 刘健
Original assignee: Shandong Mingyu Heavy Industry Machinery Co Ltd
Current assignee: Shandong Mingyu Heavy Industry Machinery Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-07-23
Anticipated expiration: 2041-04-26
Also published as: CN112978629A

Abstract

The invention relates to the technical field of forklifts, in particular to a forklift protection device, which comprises a protection flat plate with a rectangular structure, a vertical upright rod, a side protection mechanism and a gravity center balance mechanism, wherein the side protection mechanism comprises two side panels, each side panel is hinged with one long edge of a protection bottom plate through a hinged shaft, the gravity center balance mechanism comprises a tripod, a balance rod and a pull rod which are vertically fixed on the protection flat plate, the top of the short edge of the protection flat plate, which is close to the vertical upright rod, is provided with a hinged seat, and the top of the protection flat plate is provided with a plurality of force unloading components. The two sides of the cab are protected, and the safety risk of a driver is reduced.

Description

Forklift protection device

Technical Field

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

Background

The forklift truck protection device relates to a truck frame body, a cab and the like, wherein a driver sits in the cab, when driving operation is carried out, if a heavy object falls onto a forklift truck overhead guard (or the cab) from a high position, the overhead guard (or the cab) is easy to crush flat or even directly crushed, the driver is injured, and the top of the cab is provided with glass which is easier to crush and injure the driver; or when the forklift turns over during the driving process, the side of the frame body lands, and the cab glass can be directly crushed and deformed due to insufficient strength and glass of the cab, so that a driver is very easily injured.

The forklift protection device with the patent publication No. CN201711083833.9 comprises a ceiling assembly arranged above a cab of a forklift and a stand column assembly which is connected with the ceiling assembly and supports the ceiling assembly, wherein a gap is formed between the ceiling assembly and glass arranged at the top of the cab, so that the gap is kept between the ceiling assembly and the top glass of the cab, and through the design of the gap, falling objects are directly hit on the ceiling assembly and cannot fall on the top surface of the cab, so that a driver in the cab is not directly injured, and the protection effect on the forklift driver is improved; and there is certain distance between the top glass of ceiling assembly and driver's cabin, has guaranteed abundant light source, and the light transmissivity is good, can let the light source directly see through the clearance and get into the driver's cabin, can not influence driver's sight.

But has several disadvantages:

(1) this fork truck protector's installation, it is higher to fork truck's requirement, a lot of structures need be installed in the top outside of fork truck's driver's cabin, come this fork truck protector's of adaptation installation, a part weight that the driver's cabin still need bear car protector simultaneously, improve and require the rigidity of driver's cabin, this fork truck protector can only be sold by supporting fork truck, this fork truck protector purchases alone and installs on the fork truck that does not have adaptation structure, its structural center of gravity is unstable.

(2) The top of this protection frame is the horizontal support body only, does not have the function of unloading power and buffering, smashes on this protection frame as the heavy object, and the protection frame is out of shape easily, still produces the influence to whole fork truck's driver's cabin for the glass of driver's cabin is broken.

(3) This fork truck protector only plays the guard action to the heavy object potential safety hazard at top, does not have protect function to the driver's cabin both sides, still has the safety risk.

Disclosure of Invention

The invention aims to provide a forklift truck protection device aiming at the defects of the prior art.

In order to solve the above problems, the present invention provides the following technical solutions:

a forklift truck protection device comprises a protection flat plate with a rectangular structure, a vertical upright rod, a side protection mechanism and a gravity center balance mechanism, the vertical upright stanchion is integrated with the bottom of one short side of the protection flat plate, the side protection mechanism comprises two side panels, each side panel is hinged with one long side of the protection bottom plate through a hinge shaft, the gravity center balance mechanism comprises a tripod, a balance rod and a pull rod which are vertically fixed on a protective flat plate, the top of the short edge of the protective flat plate close to the vertical upright rod is provided with a hinged seat, the middle section of the balancing pole is rotationally connected with the hinged seat through a rotating shaft, the axis of the rotating shaft is horizontally vertical to the central line of the vertical upright pole, one end of the balancing rod is hinged to the top end of the tripod, the other end of the balancing rod is hinged to one end of the pull rod, and the top of the protection flat plate is provided with a plurality of force unloading assemblies.

Further, two long limits at the dull and stereotyped top of protection all articulate there is the linkage cylinder, the output shaft axis of linkage cylinder is perpendicular with the dull and stereotyped long limit of protection, the end of linkage cylinder is articulated with one of them long limit of protection flat board, the output of linkage cylinder pass through the connecting rod and articulate with the dull and stereotyped articulated side board in another long limit of protection, the output fixed mounting of linkage cylinder has first connecting seat, the one end of connecting rod is passed through the axis and is articulated with first connecting seat, side board middle part is provided with the second connecting seat, the second connecting seat is articulated through the other end that links up axle and connecting rod.

Further, the tripod is the isosceles triangle structure, the place plane of tripod is perpendicular with the place plane of side board and the place plane of protection flat board simultaneously, the top of tripod is articulated through the one end of pivot with the balancing pole, and the pivot is parallel with the rotation axis, the pull rod including rotatory frame, first lead screw and with the second lead screw of first lead screw concentric line, rotatory frame is provided with two respectively with first lead screw and second lead screw thread fit's screw hole, the screw direction of first lead screw and second lead screw is opposite, the one end that rotatory frame was kept away from to first lead screw is articulated with the tip of balancing pole, the one end that rotatory frame was kept away from to the second lead screw is articulated through the cross axle and is installed the third connecting seat.

Furthermore, all the force unloading assemblies are respectively arranged at the two sides of the top of the protection flat plate and positioned on the tripod, each force unloading assembly comprises a force unloading plate and a vertically arranged ball head rod, and the center of the bottom of the force unloading plate is provided with a ball cap which is in running fit with the top end of the ball head rod.

Furthermore, the bottom of the stress relief plate is of a rectangular structure, and four right-angle positions of the bottom of the stress relief plate are provided with soft cushion blocks.

Further, the connecting rod is the arc structure, the intrados of connecting rod is down and its place plane is perpendicular with the axis of articulated shaft, first connecting seat is located centraxonial top fixed mounting and has the limiting plate.

Furthermore, the protection plate is provided with a groove for accommodating the force unloading assembly, the depth of the groove is greater than the thickness of the force unloading assembly, and a gap is formed between the force unloading plate and the inner wall of the groove.

The forklift protection device disclosed by the invention has the following beneficial effects:

one is as follows: according to the invention, the vertical upright rod is fixed on the forklift, the third connecting seat at the bottom end of the pull rod is fixed on the forklift, and then the balance rod is pulled by the pull rod, so that the protection flat plate can still keep horizontal and cannot incline when a heavy object is smashed, the structure added on the forklift for adapting the forklift protection device is completely omitted, and the adaptation rate of the forklift protection device is improved.

The second step is as follows: the protective flat plate is not directly contacted with the top of the cab of the forklift, the cab is not affected when heavy objects fall on the protective flat plate to generate impact vibration, and the cab does not bear part of the weight of the protective device, so that the requirement on the rigidity of the cab is reduced.

And thirdly: according to the force unloading assembly on the protection flat plate, when a heavy object falls down, the force unloading plate is smashed, inclined and swings around the bulb rod, so that part of impact force of the heavy object can be decomposed, impact of the heavy object on the protection flat plate is reduced, deformation of the protection flat plate is avoided, influence on a cab of a whole forklift is reduced, and glass breakage of the cab is avoided.

Fourthly, the method comprises the following steps: according to the invention, the linkage air cylinder drives the two side panels to overturn around the hinge shaft to a vertical state, and the two side panels shield the upper half part of the cab, so that the two sides of the cab are protected on the premise of not influencing the sight, and the safety risk of a driver is reduced.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic perspective view of the side protection mechanism of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is a schematic view, partially in section, in perspective, of the shield plate and force-relief assembly of the present invention;

FIG. 6 is an enlarged view of FIG. 5 at B;

fig. 7 is a side view of the center of gravity balancing mechanism of the present invention.

Description of reference numerals:

the device comprises a protective flat plate 1, a vertical upright rod 2, a side protective mechanism 3, a side panel 31, a hinge shaft 32, a linkage cylinder 33, a connecting rod 34, a first connecting seat 35, a middle shaft 36, a second connecting seat 37, a connecting shaft 38, a limiting plate 39, a gravity center balance mechanism 4, a tripod 41, a balance rod 42, a pull rod 43, a hinge seat 44, a rotating shaft 45, a first screw rod 46, a second screw rod 47, a rotating frame 48, a third connecting seat 49, a force unloading assembly 5, a force unloading plate 51, a ball head rod 52, a ball cap 53, a cushion block 54, a transverse shaft 6, a groove 7 and a rotating shaft 8.

Detailed Description

The following detailed description of specific embodiments of the present invention is made with reference to the accompanying drawings and examples:

referring to fig. 1 to 7, a forklift protection device comprises a protection flat plate 1 with a rectangular structure, a vertical upright 2, a side protection mechanism 3 and a gravity center balance mechanism 4, wherein the vertical upright 2 is integrally formed with the bottom of one short side of the protection flat plate 1, the side protection mechanism 3 comprises two side panels 31, each side panel 31 is hinged with one long side of a protection bottom plate through a hinge shaft 32, the gravity center balance mechanism 4 comprises a tripod 41, a balance bar 42 and a pull rod 43 which are vertically fixed on the protection flat plate 1, a hinge seat 44 is arranged at the top of the short side of the protection flat plate 1 close to the vertical upright 2, the middle section of the balance bar 42 is rotatably connected with the hinge seat 44 through a rotating shaft 45, the axis of the rotating shaft 45 is horizontally perpendicular to the center line of the vertical upright 2, and one end of the balance bar 42 is hinged with the top end of the tripod 41, the other end of the balance rod 42 is hinged with one end of the pull rod 43, the top of the protection flat plate 1 is provided with a plurality of force unloading assemblies 5, the bottom end of the vertical upright rod 2 is fixed at the back of a cab of the forklift, the protection flat plate 1, the side protection mechanism 3 and the gravity center balance mechanism 4 are erected right above the cab through the vertical upright rod 2, the protection flat plate 1 is erected right above the cab, the gravity center of the protection flat plate 1 is right in front of the vertical upright rod 2, the bottom end of the pull rod 43 is hinged at the back of the cab of the forklift, by utilizing the lever balance principle, when a heavy object is hit on the protection flat plate 1, the heavy object can be guaranteed to be hit off, one end of the balance rod 42 is pulled through the pull rod 43, the relative acting force can prevent the protection flat plate 1 from still keeping horizontal and not inclining to the front lower part of the forklift, and the structure added on, the adaptation rate of the forklift protection device is improved.

Two long edges at the top of the protection flat plate 1 are hinged with linkage cylinders 33, the axis of an output shaft of each linkage cylinder 33 is perpendicular to the long edge of the protection flat plate 1, the tail end of each linkage cylinder 33 is hinged with one long edge of the protection flat plate 1, the output end of each linkage cylinder 33 is hinged with a side plate 31 hinged with the other long edge of the protection flat plate 1 through a connecting rod 34, a first connecting seat 35 is fixedly installed at the output end of each linkage cylinder 33, one end of each connecting rod 34 is hinged with the first connecting seat 35 through a middle shaft 36, a second connecting seat 37 is arranged in the middle of each side plate 31, the second connecting seat 37 is hinged with the other end of each connecting rod 34 through a connecting shaft 38, the output shaft of each linkage cylinder 33 extends out to drive the connecting rods 34 to push the side plates 31 to rotate downwards around a hinge shaft 32 to be in a vertical state, and the two linkage cylinders 33 drive the two side plates 31 to turn around the hinge shaft 32 to be in a vertical state, two side panels 31 shelter from the first half of driver's cabin, under the prerequisite that does not influence the sight, protect driver's cabin both sides, reduce driver's safety risk, and the output shaft of linkage cylinder 33 retracts, drives connecting rod 34 pulling side panel 31 and rotates to vertical state around articulated shaft 32 upwards.

The tripod 41 is in an isosceles triangle structure, the plane of the tripod 41 is perpendicular to the plane of the side panel 31 and the plane of the protective plate 1, the top end of the tripod 41 is hinged to one end of the balancing rod 42 through the rotating shaft 8, the rotating shaft 8 is parallel to the rotating shaft 45, the pull rod 43 comprises a rotating frame 48, a first lead screw 46 and a second lead screw 47 which is concentric with the first lead screw 46, the rotating frame 48 is provided with two threaded holes which are respectively in threaded fit with the first lead screw 46 and the second lead screw 47, the thread directions of the first lead screw 46 and the second lead screw 47 are opposite, one end of the first lead screw 46 far away from the rotating frame 48 is hinged to the end of the balancing rod 42, one end of the second lead screw 47 far away from the rotating frame 48 is hinged to a third connecting seat 49 through a cross shaft 6, and the hinge point of the balancing rod 42 and the tripod 41 is raised through the tripod 41, the hinge point of the balance rod 42 and the pull rod 43 is lowered, so that the pull rod 43 tends to be in a vertical state, and the space occupied by the pull rod 43 in the horizontal direction is reduced, thereby reducing the space requirement of the device.

All unload power subassembly 5 and set up the both sides that are located tripod 41 at protection flat plate 1 top respectively, unload power subassembly 5 including the bulb pole 52 of unloading power board 51 and vertical setting, the bottom center of unloading power board 51 is provided with the bulb 53 with bulb pole 52 top normal running fit, when can making the heavy object fall, unload power board 51 and be pounded the slope and rock around bulb pole 52, can decompose a part of impact force of heavy object, reduce the impact of heavy object to protection flat plate 1, avoid protection flat plate 1 to warp, reduce the influence to whole fork truck's driver's cabin simultaneously, avoid the glass breakage of driver's cabin.

The bottom of unloading board 51 is the rectangle structure, four right angles departments of unloading board 51 bottom all are provided with soft cushion 54, cushion 54 can be materials such as sponge, unload power board 51 after being pounded the slope and make a round trip to rock, take off the heavy object, the restoring force of the cushion 54 of four right angles departments restores to the horizontality with unloading board 51, the cushion 54 of four rectangle distributions, it is not fixed fulcrum to constitute, when the heavy object is pounded down, cushion 54 is squashed, unload power board 51 by the pressure slope, the direction that can make the heavy object strike is partial, according to the decomposition principle of power, the vertical downward impact force of heavy object can reduce, the decomposition power of horizontal direction makes the heavy object slide on unloading board 51, reduce the damage of impact.

Connecting rod 34 is the arc structure, the intrados of connecting rod 34 is down and its place plane is perpendicular with articulated shaft 32's axis, first connecting seat 35 is located axis 36's top fixed mounting has limiting plate 39, and limiting plate 39 can make connecting rod 34 can not rotate around axis 36 towards limiting plate 39's direction, and jamming and interference can not appear in connecting rod 34 and linkage cylinder 33's output, guarantees that linkage cylinder 33's output shaft stretches out and drives connecting rod 34 and promote the side board 31 and rotate downwards, connecting rod 34 is the arc structure, can realize side board 31 around articulated shaft 32 in the upset of vertical direction 180 degrees, can not appear interfering.

The protection plate is provided with a groove 7 for accommodating the force unloading assembly 5, the depth of the groove 7 is larger than the thickness of the force unloading assembly 5, a gap is formed between the inner walls of the force unloading plate 51 and the groove 7, the gap provides a space for the force unloading plate 51 to rock back and forth around the ball head rod 52, when a heavy object falls on the force unloading plate 51, the heavy object can not fall off from the protection flat plate 1 again when rolling down into the groove 7, and the safety influence on a cab is avoided after the heavy object falls off.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A fork truck protector which characterized in that: the protective device comprises a protective flat plate (1) with a rectangular structure, a vertical upright rod (2), a side protective mechanism (3) and a gravity center balance mechanism (4), wherein the vertical upright rod (2) and one of the short sides of the protective flat plate (1) are integrally formed, the side protective mechanism (3) comprises two side panels (31), each side panel (31) is hinged with one long side of a protective bottom plate through a hinged shaft (32), the gravity center balance mechanism (4) comprises a triangular frame (41), a balance rod (42) and a pull rod (43) which are vertically fixed on the protective flat plate (1), a hinged seat (44) is arranged at the top of the short side of the protective flat plate (1) close to the vertical upright rod (2), the middle section of the balance rod (42) is rotatably connected with the hinged seat (44) through a rotating shaft (45), and the axis of the rotating shaft (45) is horizontally vertical to the central line of the vertical upright rod (2), one end of the balance rod (42) is hinged with the top end of the tripod (41), the other end of the balance rod (42) is hinged with one end of the pull rod (43), and the top of the protection flat plate (1) is provided with a plurality of force unloading assemblies (5); the triangular support (41) is of an isosceles triangle structure, the plane of the triangular support (41) is perpendicular to the plane of the side panel (31) and the plane of the protective flat plate (1), the top end of the triangular support (41) is hinged to one end of the balance rod (42) through a rotating shaft (8), the rotating shaft (8) is parallel to the rotating shaft (45), the pull rod (43) comprises a rotating frame (48), a first screw rod (46) and a second screw rod (47) which shares the same central line with the first screw rod (46), the rotating frame (48) is provided with two threaded holes which are respectively in threaded fit with the first screw rod (46) and the second screw rod (47), the thread directions of the first screw rod (46) and the second screw rod (47) are opposite, one end, far away from the rotating frame (48), of the first screw rod (46) is hinged to the end of the balance rod (42), and one end, far away from the rotating frame (48), of the second screw rod (47) is hinged to a third connecting seat (49) through a cross shaft (6); all the force unloading assemblies (5) are respectively arranged at the top of the protective flat plate (1) and positioned at two sides of the tripod (41), each force unloading assembly (5) comprises a force unloading plate (51) and a vertically arranged ball head rod (52), and a ball cap (53) which is in running fit with the top end of each ball head rod (52) is arranged at the center of the bottom of each force unloading plate (51); the bottom of the stress relief plate (51) is of a rectangular structure, and four right-angle positions of the bottom of the stress relief plate (51) are provided with soft cushion blocks (54).

2. The forklift guard of claim 1, wherein: two long limits at protection flat board (1) top all articulate there is linkage cylinder (33), the output shaft axis of linkage cylinder (33) is perpendicular with the long limit of protection flat board (1), the end of linkage cylinder (33) is articulated with one of them long limit of protection flat board (1), the output of linkage cylinder (33) passes through connecting rod (34) and articulates with another long limit articulated side board (31) of protection flat board (1), the output fixed mounting of linkage cylinder (33) has first connecting seat (35), the one end of connecting rod (34) is passed through axis (36) and is articulated with first connecting seat (35), side board (31) middle part is provided with second connecting seat (37), second connecting seat (37) are articulated through the other end that links up axle (38) and connecting rod (34).

3. The forklift guard of claim 2, wherein: the connecting rod (34) is of an arc-shaped structure, the inner arc surface of the connecting rod (34) faces downwards, the plane where the inner arc surface is located is perpendicular to the axis of the hinge shaft (32), and a limiting plate (39) is fixedly mounted above the middle shaft (36) of the first connecting seat (35).

4. The forklift guard of claim 1, wherein: the protection flat plate (1) is provided with a groove (7) used for accommodating the force unloading assembly (5), the depth of the groove (7) is larger than the thickness of the force unloading assembly (5), and a gap is formed between the force unloading plate (51) and the inner wall of the groove (7).