CN110759286A

CN110759286A - Forklift overhead guard and forklift with same

Info

Publication number: CN110759286A
Application number: CN201810846617.3A
Authority: CN
Inventors: 赵荣尊
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2020-02-07

Abstract

The invention discloses a forklift overhead guard and a forklift with the same, wherein the forklift overhead guard comprises: the landing leg group, top frame and drive arrangement, the landing leg group is used for linking to each other with fork truck's automobile body, the top frame includes first sub top frame and the sub top frame of second, first sub top frame pushes up frame and the sub top frame of second along controlling direction sliding connection, first sub top frame pushes up the frame with the sub top frame of second all links to each other with the landing leg group, and first sub top frame pushes up at least one in frame and the sub top frame of second and landing leg group along controlling direction sliding connection, actuating mechanism connects between first sub top frame and the sub top frame of second, be used for driving first sub top frame and the sub top frame of second along controlling direction relative slip. According to the forklift overhead guard provided by the invention, the top frame capable of relatively sliding along the left and right directions and the supporting leg group in sliding fit with the top frame are arranged, so that the forklift can be adjusted according to the upper width condition of a passing area, the passing performance of the forklift is further enhanced, and the application range of the forklift is wider.

Description

Forklift overhead guard and forklift with same

Technical Field

The invention relates to the technical field of vehicle manufacturing, in particular to a forklift overhead guard and a forklift with the same.

Background

In the related art, the width of the overhead guard of the forklift is the same as that of the main body of the forklift, so that the forklift is easy to interfere with the overhead guard when passing through a shelf with a wide bottom and a narrow top (such as a through shelf), or sometimes the forklift needs to pass through a low factory door, the forklift cannot pass through the overhead guard, and the passing performance of the forklift is affected.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to provide an adjustable width, removable forklift canopy guard.

The invention also provides a forklift with the forklift overhead guard.

The forklift overhead guard according to the present invention comprises: the supporting leg group is used for being connected with a forklift body; the top frame comprises a first sub top frame and a second sub top frame, the first sub top frame and the second sub top frame are connected in a sliding mode along the left-right direction, the first sub top frame and the second sub top frame are both connected with the supporting leg group, and at least one of the first sub top frame and the second sub top frame is connected with the supporting leg group in a sliding mode along the left-right direction; and the driving mechanism is connected between the first sub top frame and the second sub top frame and is used for driving the first sub top frame and the second sub top frame to relatively slide along the left-right direction.

According to the forklift overhead guard provided by the invention, the top frame capable of relatively sliding along the left and right directions and the supporting leg group capable of slidably matching with the top frame are arranged, so that the forklift can be adjusted according to the width of the upper part of a passing area, the passing performance of the forklift is further enhanced, the application range of the forklift is wider, and the driver can adjust the transverse dimension of the top frame more conveniently and flexibly due to the arrangement of the driving device.

In some embodiments, a width of the top frame in the left-right direction is smaller than a width of the leg group in the left-right direction.

In some embodiments, the set of legs includes a plurality of legs, each of the legs including: the stand with locate the first sliding part of stand upper end, first sub-top frame with in the sub-top frame of second the lower extreme of at least one is equipped with the second sliding part, first sliding part with second sliding part is along left right direction sliding connection.

In some embodiments, one of the first and second sliding portions includes a guide rail provided with a guide groove extending in the left-right direction, and the other of the first and second sliding portions includes a slider slidably coupled with the guide rail through the guide groove.

In some embodiments, the set of legs comprises: first landing leg, second landing leg, third landing leg, fourth landing leg, the lower extreme of the front column of first sub top frame with the upper end of first landing leg is along controlling direction sliding connection, the lower extreme of the back stand of first sub top frame with the upper end of second landing leg is along controlling direction sliding connection, the lower extreme of the front column of second sub top frame with the upper end of third landing leg is along controlling direction sliding connection, the lower extreme of the back stand of second sub top frame with the upper end of fourth landing leg is along controlling direction sliding connection.

In some embodiments, the first sub-top frame and the second sub-top frame each comprise: the upper end of the front upright post is connected with the front end of the upper longitudinal beam, the upper end of the rear upright post is connected with the rear end of the upper longitudinal beam, and the lower end of the front upright post and the lower end of the rear upright post are respectively connected with the supporting leg group in a sliding mode in the left-right direction.

In some embodiments, the first sub-top box further comprises: one end of the guide sleeve is connected with the upper longitudinal beam of the first sub top frame, and the guide sleeve extends towards the direction close to the second sub top frame along the left-right direction; the second sub-top frame further comprises: one end of the guide column is connected with the upper longitudinal beam of the second sub top frame, and the guide column extends towards the direction close to the first sub top frame along the left-right direction; the guide sleeve is sleeved outside the guide column, and is connected with the guide column in a sliding mode in the left-right direction.

In some embodiments, the guide sleeve and the guide post are plural and arranged at intervals in the front-rear direction.

In some embodiments, the driving mechanism includes a telescopic cylinder, one end of the telescopic cylinder is connected to the first sub top frame, and the other end of the telescopic cylinder is connected to the second sub top frame.

In some embodiments, the telescopic cylinder comprises a cylinder body and a piston rod, one end of the cylinder body, which faces away from the piston rod, is connected with one of the first sub top frame and the second sub top frame, and the piston rod is connected with the other of the first sub top frame and the second sub top frame.

In some embodiments, the telescopic cylinder includes a cylinder body, a first piston rod and a second piston rod, the first piston rod and the second piston rod respectively extend out from two ends of the cylinder body, the first piston rod is connected to the first sub top frame, and the second piston rod is connected to the second sub top frame.

In some embodiments, the forklift overhead guard further comprises: the support frame, the support frame with landing leg group links to each other, the cylinder body with the support frame links to each other.

In some embodiments, the support frame comprises: the connecting plate is connected with two rear support legs in the support leg group; the fixing frame is connected with the connecting plate, and the cylinder body is connected with the fixing frame.

In some embodiments, the telescopic cylinder comprises a first telescopic cylinder and a second telescopic cylinder, the first telescopic cylinder and the second telescopic cylinder each comprise a cylinder body and a piston rod, the first piston rod is connected with the first sub top frame, and the second piston rod is connected with the second sub top frame;

the forklift overhead guard further comprises a supporting frame, the supporting frame is connected with the supporting leg group, and the cylinder body is connected with the supporting frame.

In some embodiments, the drive mechanism comprises: a power source; the gear is connected with the output end of the power source; the first rack and the second rack are meshed with the gear and distributed on two sides of the gear, the first rack is connected with the first sub top frame, and the second rack is connected with the second sub top frame.

The forklift overhead guard according to the present invention comprises: the forklift comprises a first sub top frame and a second sub top frame, wherein the first sub top frame and the second sub top frame are connected in a sliding mode along the left-right direction, the first sub top frame and the second sub top frame are both connected with a forklift body, and at least one of the first sub top frame and the second sub top frame is connected with the forklift body in a sliding mode along the left-right direction; and the driving mechanism is connected between the first sub top frame and the second sub top frame and is used for driving the first sub top frame and the second sub top frame to relatively slide along the left-right direction.

According to the forklift overhead guard provided by the invention, the change of the transverse size of the forklift overhead guard is realized through the sliding of the first sub-top frame and/or the second sub-top frame along the left and right directions of the forklift body, so that the passing performance of the forklift is enhanced.

The forklift truck according to the present invention includes the forklift truck according to any one of the above embodiments of the present invention.

According to the forklift provided by the invention, as long as the region where the wheels of the forklift can pass is provided, the forklift can pass through the region with limited space (narrower or lower) at the upper part of the forklift by adjusting or disassembling the forklift overhead guard, so that the safety of a driver is ensured, and meanwhile, the passing performance of the forklift is enhanced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

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 schematic structural view of a forklift overhead guard according to one embodiment of the present invention;

FIG. 2 is a schematic structural view of a top frame according to one embodiment of the present invention;

FIG. 3 is a schematic structural view of a leg set according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a drive mechanism according to one embodiment of the present invention;

FIG. 5 is a schematic structural view of a forklift overhead guard according to another embodiment of the invention;

FIG. 6 is a schematic structural view of a top frame according to another embodiment of the present invention;

FIG. 7 is a schematic structural view of a leg set (showing a support stand) according to another embodiment of the present invention;

FIG. 8 is a schematic perspective view of a drive mechanism according to another embodiment of the present invention;

FIG. 9 is a cross-sectional view of a drive mechanism according to another embodiment of the present invention;

FIG. 10 is a schematic structural view of a forklift overhead guard according to yet another embodiment of the invention;

FIG. 11 is a schematic structural view of a leg set (showing a support stand) according to yet another embodiment of the present invention;

FIG. 12 is a cross-sectional view of a drive mechanism according to yet another embodiment of the present invention;

FIG. 13 is a schematic perspective view of a drive mechanism according to yet another embodiment of the present invention;

FIG. 14 is a schematic structural view of a forklift overhead guard according to yet another embodiment of the invention;

FIG. 15 is a schematic structural diagram of a top frame according to yet another embodiment of the present invention;

FIG. 16 is a schematic structural view of a leg set (showing a support stand) according to yet another embodiment of the present invention

FIG. 17 is a schematic perspective view of a drive mechanism according to yet another embodiment of the present invention (power source not shown);

figure 18 is a cross-sectional view of a lift truck (without the support frame) according to one embodiment of the present invention;

figure 19 is a cross-sectional view of a lift truck (including a support frame) according to another embodiment of the present invention;

FIG. 20 is a schematic view of the construction of a canopy guard and shelf according to the present invention;

fig. 21 and 22 are schematic views of the mating of the first slider portion with the second slider portion according to the present invention.

Reference numerals:

a forklift 1000;

a forklift overhead guard 100;

a leg group 1; a first leg 11; a second leg 12; a third leg 13; a fourth leg 14; a first sliding portion 101; a reinforcing rib 102;

a top frame 2; a first sub-top frame 21; a guide sleeve 211; a second sub-top frame 22; a guide post 221; a second sliding portion 201; a front pillar 202; an upper longitudinal beam 203; a rear pillar 204;

a drive mechanism 3; a telescopic cylinder 31; a cylinder body 311; a piston rod 312; a first telescopic cylinder 32; a second telescopic cylinder 33; the first cylinder 321; a first piston rod 322; the second cylinder 331; the second piston rod 332; a first oil port 301; a second oil port 302; a power source 34; a gear 35; a first rack 36; a second rack 37;

a support frame 4; a connecting plate 41; a fixed frame 42; a rack fixing plate 43;

a shelf 2000.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Wherein, the longitudinal direction, i.e. the X direction, refers to the front and back direction of the forklift; the transverse direction is the Y direction and refers to the left and right directions of the forklift; the vertical direction is the Z direction, and refers to the up-down direction of the forklift.

A forklift overhead guard 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 22.

As shown in fig. 1 to 22, a forklift overhead guard 100 according to an embodiment of the present invention includes: the forklift truck comprises a supporting leg group 1, a top frame 2 and a driving mechanism 3, wherein the supporting leg group 1 is used for being connected with a truck body of the forklift truck 1000, the top frame 2 comprises a first sub top frame 21 and a second sub top frame 22, the first sub top frame 21 comprises a guide sleeve 211 extending along the left-right direction to the direction close to the second sub top frame 22, the second sub top frame 22 comprises a guide column 221 extending along the left-right direction to the direction close to the first sub top frame 21, the guide sleeve 211 is sleeved outside the guide column 221, the guide sleeve 211 and the guide column 221 are connected in a sliding mode along the left-right direction to enable the first sub top frame 21 and the second sub top frame 22 to be arranged along the left-right direction, the first sub top frame 21 and the second sub top frame 22 are connected in a sliding mode along the left-right direction to enable the first sub top frame 21 and the second sub top frame 22 to slide relatively along the left-right direction, the first sub top frame 21 and the second sub top frame 22 are both connected with the supporting leg group 1, and at least one of the first sub top frame 21 and the second sub top frame 22 is connected with the supporting, the driving mechanism 3 is connected between the first sub top frame 21 and the second sub top frame 22, and is used for driving the first sub top frame 21 and the second sub top frame 22 to slide relatively in the left-right direction.

The sliding of the first sub top frame 21 and the second sub top frame 22 in the left-right direction includes various cases, which will be described in further detail below:

in some embodiments, when one of the first sub top frame 21 and the second sub top frame 22 is slidably connected to the leg group 1, taking the first sub top frame 21 is slidably connected to the leg group 1, and the second sub top frame 22 is fixedly connected to the leg group 1 as an example, the driving device may drive the first sub top frame 21 to move toward the second sub top frame 22, so as to reduce the lateral dimension of the top frame 2; the driving device 3 can drive the first sub top frame 21 to move away from the second sub top frame 22, so that the transverse size of the top frame 2 is increased. When the first sub top frame 21 is fixedly connected with the leg assembly 1, and the second sub top frame 22 is slidably connected with the leg assembly 1, the driving manner of the driving mechanism 3 for the top frame 2 is similar, and is not described herein again.

In other embodiments, when the first sub top frame 21 is slidably connected to the leg group 1, and the second sub top frame 22 is slidably connected to the leg group 1, the driving device 3 may drive the first sub top frame 21 to move toward the second sub top frame 22, and the driving device 3 may drive the second sub top frame 22 to move toward the first sub top frame 21, so as to reduce the lateral dimension of the top frame 2; the driving device 3 may drive the first sub top frame 21 to move away from the second sub top frame 22, and the driving device 3 may drive the second sub top frame 22 to move away from the first sub top frame 21 so as to increase the transverse dimension of the top frame 2.

As shown in fig. 1 to 22, in some examples, both the first sub top frame 21 and the second sub top frame 22 are slidably connected to the leg group 1 in the left-right direction.

The connection of the guide sleeve 211 and the guide column 221 forms a cross beam supporting structure connected between the upper longitudinal beam 203 of the first sub top frame 21 and the upper longitudinal beam 203 of the second sub top frame 22, so that the top frame 2 forms a structure with an upper part capable of preventing objects from falling high, so that the forklift overhead guard 100 can realize the function of protecting a driver, the guide sleeve 211 can slide relative to the guide column 221, so that the sliding connection of the first sub top frame 21 and the second sub top frame 22 is realized, the guide column 221 and the guide sleeve 211 are matched, the guide sleeve 211 can limit the guide column 221 in multiple directions, the guide effect is good, and because the guide sleeve 211 is sleeved outside the guide column 221, the strength of the top frame 2 at the position is high, the mutual limiting effect of the guide column 221 and the guide sleeve 211 is good, the strength of the top frame 2 at the position is high, so that the performance of preventing objects from falling high above the vehicle can be enhanced, and the manufacturing cost is low, and the assembly is convenient.

The guide sleeve 211 and the guide column 221 are matched in a manner that the sliding range of the guide sleeve 211 and the guide column 221 is large, for example, when the lengths of the guide sleeve 211 and the guide column 221 are the same, the maximum transverse dimension of the top frame 2 can be close to the sum of the total lengths of the guide column 221 and the guide sleeve 211. In a normal state, the guide post 221 and the guide sleeve 211 are only sleeved with each other in a small section, when the first sub top frame 21 and the second sub top frame 22 slide relatively in a direction of being relatively close to each other in a transverse direction, and the guide sleeve 211 is completely sleeved outside the guide post 221, the total width of the top frame 2 is close to about half of the normal state, that is, the minimum transverse dimension of the top frame 2 can be close to the length of the guide post 221 or the guide sleeve 211. That is, the lateral adjustment range of the top frame 2 is large, and the passing performance of the forklift 1000 in a narrow area is stronger.

In some examples, the guide sleeve 211 may be a flat tube, the guide post 221 may be a flat steel, the flat steel may be inserted into the flat tube, and the flat steel may slide in the flat tube, and the flat steel and the flat tube cooperate to realize the sliding connection of the first sub top frame 21 and the second sub top frame 22.

In some examples, as shown in fig. 1 to 20, the first sub top frame 21 and the second sub top frame 22 may be arranged in a left-right direction, that is, in a lateral direction, so that when the forklift 1000 needs to pass through a rack 2000 or the like having a narrow top, the first sub top frame 21 and the second sub top frame 22 of the forklift canopy guard 100 may slide relatively in the left-right direction, and at least one of the first sub top frame 21 and the second sub top frame 22 may slide relatively in the left-right direction with respect to the leg group 1, that is, the first sub top frame 21 and the second sub top frame 22 may slide in directions approaching each other, so that the width of the upper portion of the forklift canopy guard 100 in the lateral direction is reduced, so that the forklift 1000 may pass through an area having a narrow top; when the forklift 1000 works in a relatively open area, the first sub top frame 21 and the second sub top frame 22 can slide in directions away from each other, so that the width of the forklift overhead guard 100 in the transverse direction is increased, the protection range of the forklift overhead guard 100 can be increased, and then falling objects and the like are prevented from injuring a driver.

When the driver normally uses the forklift 1000, the driver rides on the lower part of the forklift overhead guard 100, because only the top frame 2 on the upper part of the forklift overhead guard 100 is designed into the first sub top frame 21 and the second sub top frame 22 which can slide relatively, when passing through the narrow area on the top, only the top frame 2 on the upper part of the forklift overhead guard 100 needs to be narrowed, the supporting leg group 1 on the lower part of the forklift overhead guard 100 is fixed, the driver can be prevented from being accidentally injured when the forklift overhead guard 100 is narrowed, and when the forklift overhead guard 100 is narrowed, the working space of the driver is not influenced.

In some examples, the set of outriggers 1 and the top frame 2 of the forklift overhead guard 100 may be detachably connected, so that the top frame 2 may be detached from the set of outriggers 1 when the forklift 1000 passes through a relatively low area such as a factory door, thereby reducing the overall height of the forklift 1000, allowing the forklift 1000 to pass through the relatively low area, and thus widening the use range of the forklift overhead guard 100.

According to the forklift overhead guard 100 provided by the embodiment of the invention, the top frame 2 capable of relatively sliding along the left-right direction and the supporting leg group 1 in sliding fit with the top frame 2 are arranged, so that the forklift 1000 can be adjusted according to the width of the upper part of a passing area, the passing performance of the forklift 1000 is further enhanced, the application range of the forklift 1000 is wider, the strength of the top frame 2 at the position is large due to the arrangement of the guide sleeve 211 and the guide column 221, the transverse size adjusting range is large, the safety and the passing performance of the forklift 1000 are further enhanced, and the arrangement of the driving device 3 enables a driver to conveniently and flexibly adjust the transverse size of the top frame 2.

Some embodiments of a forklift overhead guard 100 according to the present invention are described below with reference to fig. 1 to 22.

In some embodiments, as shown in fig. 18 to 20, the width of the top frame 2 in the left-right direction is smaller than the width of the leg group 1 in the left-right direction, so that when the top frame 2 moves relative to the leg group 1, the width of the top frame 2 in the left-right direction is smaller than the width of the leg group 1 in the left-right direction, and thus the forklift canopy guard 100 with a narrow top and a wide bottom can be formed, while the passing performance of the forklift 1000 is enhanced, the structural strength of the forklift canopy guard 100 can be ensured, and a driver can be better protected from being injured by high-altitude falling objects and the like.

In some embodiments, as shown in fig. 1 to 16, the leg set 1 includes a plurality of legs, the plurality of legs are provided to ensure the supporting strength of the forklift canopy guard 100, and each leg includes: the supporting leg group comprises a vertical column and a first sliding portion 101 arranged at the upper end of the vertical column, a second sliding portion 201 is arranged at the lower end of at least one of the first sub top frame 21 and the second sub top frame 22, the first sliding portion 101 and the second sliding portion 201 are connected in a sliding mode in the left-right direction, and the first sliding portion 101 is matched with the second sliding portion 201 to achieve sliding of the first sub top frame 21 and/or the second sub top frame 22 relative to the supporting leg group 1.

In some examples, as shown in fig. 18 and 19, a reinforcing rib 102 may be further provided at a junction of each leg and the second sliding portion 201, and the provision of the reinforcing rib 102 may enhance the strength of the forklift canopy guard 100 at the junction, and also enhance the structural strength of the leg group 1, thereby enhancing the protection performance of the forklift canopy guard 100.

In some embodiments, as shown in fig. 21 and 22, one of the first sliding portion 101 and the second sliding portion 201 includes a guide rail provided with a guide groove extending in the left-right direction, and the other of the first sliding portion 101 and the second sliding portion 201 includes a slider slidably coupled to the guide rail through the guide groove, for example, as shown in fig. 1 to 22, the first sliding portion 101 includes a slide rail, and the second sliding portion 201 includes a slider. The cooperation form simple structure of slider and guide rail, low cost to can reduce fork truck overhead guard 100's manufacturing cost, and the guide slot can play spacing effect to the slider, thereby make this sliding construction can be stable slide along the left and right directions of fork truck 1000, promoted fork truck overhead guard 100's gliding stability.

In some embodiments, as shown in fig. 1-16, leg set 1 includes: the lower end of the front upright column 202 of the first sub top frame 21 is connected with the upper end of the first supporting leg 11 in a left-right sliding manner, the lower end of the rear upright column 204 of the first sub top frame 21 is connected with the upper end of the second supporting leg 12 in a left-right sliding manner, the lower end of the front upright column 202 of the second sub top frame 22 is connected with the upper end of the third supporting leg 13 in a left-right sliding manner, the lower end of the rear upright column 204 of the second sub top frame 22 is connected with the upper end of the fourth supporting leg 14 in a left-right sliding manner, so that the first sub top frame 21 and the second sub top frame 22 can slide relative to the four supporting legs of the supporting leg group 1, when the width of the top frame 2 in the left-right direction needs to be reduced, the first sub top frame 21 slides in a direction close to the second sub top frame 22, the second sub top frame 22 slides in a direction close to the first sub top frame 21, and the distance between the first sub top frame 21 and the second sub top frame 22 is reduced, namely, the width of the top frame 2 of the upper part of the forklift overhead guard 100 in the left-right direction is reduced.

In some embodiments, as shown in fig. 1 to 16, each of the first sub top frame 21 and the second sub top frame 22 includes: the forklift top guard comprises a front upright 202, an upper longitudinal beam 203 and a rear upright 204, wherein the upper end of the front upright 202 is connected with the front end of the upper longitudinal beam 203, the upper end of the rear upright 204 is connected with the rear end of the upper longitudinal beam 203, the lower end of the front upright 202 and the lower end of the rear upright 204 are respectively connected with a supporting leg group 1 in a sliding mode along the left-right direction, and the front upright 202, the upper longitudinal beam 203 and the rear upright 204 jointly form a framework of a top frame 2, so that the strength of the upper portion of the forklift top guard 100 is guaranteed. In some examples, the front pillar 202 and the upper side rail 203 may be integrally formed, and the upper side rail 203 and the rear pillar 204 may be connected by welding. In some examples, the joint of the upper longitudinal beam 203 and the rear upright 204 may further be provided with a reinforcing rib, and the arrangement of the reinforcing rib may enhance the joint strength of the upper longitudinal beam 203 and the rear upright 204, and also enhance the structural strength of the top frame 2 at the joint, thereby enhancing the protection performance of the forklift top guard 100.

In some embodiments, as shown in fig. 1-16, the first sub-top frame 21 further includes: one end of the guide sleeve 211 is connected with the upper longitudinal beam 203 of the first sub top frame 21, and the guide sleeve 211 extends towards the direction close to the second sub top frame 22 along the left-right direction; the second sub-top frame 22 further includes: one end of the guide column 221 is connected with the upper longitudinal beam 203 of the second sub top frame 22, and the guide column 221 extends in the left-right direction to be close to the first sub top frame 21; the guide sleeve 211 is sleeved outside the guide column 221, the guide sleeve 211 is connected with the guide column 221 in a sliding mode in the left-right direction, the guide sleeve 211 is connected with the guide column 221 to form a cross beam which is connected with the upper longitudinal beam 203 of the first sub top frame 21 and the upper longitudinal beam 203 of the second sub top frame 22, so that the top frame 2 forms a structure capable of preventing objects from falling from high altitude, the forklift overhead guard 100 can achieve the function of protecting a driver, the guide sleeve 211 can slide relative to the guide column 221, sliding connection of the first sub top frame 21 and the second sub top frame 22 is achieved, the guide column 221 and the guide sleeve 211 are matched, the guide effect is good, the mutual limiting effect of the guide column 221 and the guide sleeve 211 is good, the manufacturing cost is low, and assembly is convenient. The guide sleeve 211 can be a flat through, the guide column 221 can be a flat steel, the flat steel can be inserted into the flat through, the flat steel can slide in the flat through, and the flat steel and the flat through are matched to realize the sliding connection of the first sub top frame 21 and the second sub top frame 22.

In some embodiments, as shown in fig. 1 to 16, each of the guide sleeves 211 and the guide pillars 221 is multiple and arranged at intervals in the front-back direction, the guide sleeves 211 correspond to the guide pillars 221 one by one, that is, each of the guide sleeves 211 has the guide pillar 221 matched therewith, and the matching of the plurality of guide sleeves 211 and the guide pillars 221 can improve the effect of preventing objects from falling from high altitude of the top frame 2, and can improve the connection strength between the first sub top frame 21 and the second sub top frame 22 and stabilize the relative sliding.

In some embodiments, as shown in fig. 1-16, the forklift overhead guard 100 further comprises: actuating mechanism 3, actuating mechanism 3 is connected between first sub top frame 21 and the sub top frame 22 of second, be used for driving first sub top frame 21 and the sub top frame 22 of second along left right direction relative slip, actuating mechanism 3's setting makes the relative slip of first sub top frame 21 and the sub top frame 22 of second can be better controlled, the driver need not get off only need can realize the regulation to the transverse dimension of top frame 2 on the car through controlling actuating mechanism 3, the drive mode is more convenient, it is nimble. The driving mechanism 3 may be hydraulic, pneumatic, electric, etc.

In some embodiments, as shown in fig. 1 to 16, the driving mechanism 3 includes a telescopic cylinder 31, one end of the telescopic cylinder 31 is connected to the first sub top frame 21, the other end of the telescopic cylinder 31 is connected to the second sub top frame 22, the first sub top frame 21 and the second sub top frame 22 can be realized by extension and contraction of the telescopic cylinder 31, and the telescopic cylinder 31 has a small volume, is convenient to operate, and is low in manufacturing cost. The telescopic cylinder 31 can be connected to the top frame 2 through bolts, so that the telescopic cylinder 31 is convenient to assemble, and the telescopic cylinder 31 is convenient to replace or maintain.

In some embodiments, as shown in fig. 1 to 4, the telescopic cylinder 31 includes a cylinder body 311 and a piston rod 312, an end of the cylinder body 311 facing away from the piston rod 312 is connected to one of the first sub top frame 21 and the second sub top frame 22, and the piston rod 312 is connected to the other of the first sub top frame 21 and the second sub top frame 22, that is, when the cylinder body 311 is connected to the first sub top frame 21, the piston rod 312 is connected to the second sub top frame 22; when the piston rod 312 is connected to the first sub top frame 21, the cylinder body 311 is connected to the second sub top frame 22. The relative sliding of the first sub top frame 21 and the second sub top frame 22 can be realized by the relative movement of the piston rod 312 and the cylinder 311: when the transverse size of the top frame 2 needs to be reduced, the piston rod 312 is contracted towards the cylinder 311, so as to drive the first sub top frame 21 and the second sub top frame 22 to shorten the relative distance therebetween; when the transverse size of the top frame 2 needs to be increased, the piston rod 312 extends in a direction away from the cylinder 311, so as to drive the first sub top frame 21 and the second sub top frame 22 to increase the relative distance therebetween.

The telescopic cylinder 31 in the above embodiment may be a hydraulic cylinder, and one end of the cylinder body 311 connected to the piston rod 312 is provided with a first oil port 301, and the other end of the cylinder body 311 is provided with a second oil port 302, when the transverse size of the top frame 2 needs to be widened, the second oil port 302 takes oil, the first oil port 301 returns oil, and at least a part of the piston rod 312 extends out of the cylinder body 311 under the action of oil pressure; when the transverse size of the top frame 2 needs to be narrowed, oil enters from the first oil port 301, oil returns from the second oil port 302, at least one part of the piston rod 312 retracts into the cylinder body 311 under the action of oil pressure, the hydraulic oil cylinder stretches out or contracts the piston rod 312 with the oil entering or returning through the oil holes, the stability of the hydraulic oil cylinder is good, and the control is convenient, so that the reliability of the forklift top protection frame 100 is enhanced.

In other embodiments, as shown in fig. 5 to 9, the telescopic cylinder 31 may include a cylinder body 311, a first piston rod 322 and a second piston rod 332, the first piston rod 322 and the second piston rod 332 respectively extend from two ends of the cylinder body 311, the first piston rod 322 is connected to the first sub top frame 21, the second piston rod 332 is connected to the second sub top frame 22, and the relative sliding between the first sub top frame 21 and the second sub top frame 22 may be achieved by the relative movement between the first piston rod 322 and the cylinder body 311 and the relative movement between the second piston rod 332 and the cylinder body 311: when the transverse size of the top frame 2 needs to be reduced, the first piston rod 322 contracts towards the cylinder body 311, and the second piston rod 332 contracts towards the cylinder body 311, so that the first sub top frame 21 and the second sub top frame 22 are driven to shorten the relative distance; when the transverse size of the top frame 2 needs to be increased, the first piston rod 322 extends in the direction away from the cylinder body 311, and the second piston rod 332 extends in the direction away from the cylinder body 311, so that the first sub top frame 21 and the second sub top frame 22 are driven, and the relative distance between the first sub top frame 21 and the second sub top frame 22 is increased.

The telescopic cylinder 31 in the above embodiment may be a hydraulic cylinder, and one end of the cylinder body 311 connected to the first piston rod 322 is provided with a first oil port 301, one end of the cylinder body 311 connected to the second piston rod 332 is also provided with the first oil port 301, the cylinder body 311 between the first piston rod 322 and the second piston rod 332 is provided with a second oil port 302, when the transverse size of the top frame 2 needs to be widened, the second oil port 302 takes oil, the first oil port 301 at the first piston rod 322 and the first oil port 301 at the second piston rod 332 return oil, and at least a part of the piston rod 312 extends out of the cylinder body 311 under the action of oil pressure; when the transverse size of the top frame 2 needs to be narrowed, the first oil port 301 at the position of the first piston rod 322 and the first oil port 301 at the position of the second piston rod 332 are filled with oil, the second oil port 302 is filled with oil, at least one part of the piston rod 312 is retracted into the cylinder body 311 under the action of oil pressure, and the hydraulic oil cylinder and the oil filling or oil returning through the oil holes realize the extension or contraction of the piston rod 312; the hydraulic cylinder can also comprise a control valve, the control valve can respectively control the oil cylinder at the first piston cylinder or the oil cylinder at the second piston rod 332, and then the first piston rod 322 or the second piston rod 332 can be subjected to unilateral adjustment, or the movement strokes of the first piston rod 322 and the second piston rod 332 are different, so that when the top frame 2 can be in accordance with the conditions of different left and right widths of the top area of the forklift 1000, the independent sub top frame 2 (the first sub top frame 21 or the second sub top frame 22) can be driven to move to enable the forklift 1000 to pass through, and then the adjusting range of the top protecting frame of the forklift 1000 is larger, and the trafficability of the forklift 1000 is stronger. The stability of hydraulic cylinder is good, and is convenient for control to reinforcing fork truck overhead guard 100's reliability.

In some embodiments, as shown in fig. 5, 7, 10, 11, 14, 16, 19, the forklift overhead guard 100 further comprises: the supporting frame 4, the supporting frame 4 is connected with the supporting leg group 1, the cylinder body 311 is connected with the supporting frame 4, the supporting frame 4 is used for supporting the cylinder body 311, the cylinder body 311 is made to be immovable relative to the supporting leg, in this way, when the cylinder body 311 works, the cylinder body 311 is not moved relative to the supporting leg, the piston rod 312 moves relative to the supporting leg, therefore, the first sub top frame 21 and/or the second sub top frame 22 connected to the piston rod 312 move relative to the supporting leg, and further, the transverse size of the top frame 2 is changed.

In some embodiments, as shown in fig. 7, 11, 16, the support frame 4 comprises: the supporting leg assembly comprises a connecting plate 41 and a fixing frame 42, wherein the connecting plate 41 is connected with two supporting legs at the middle and rear parts of the supporting leg assembly 1 to support the fixing frame 42 and connect the supporting frame 4 with the supporting leg assembly 1, the fixing frame 42 is connected with the connecting plate 41, a cylinder body 311 is connected with the fixing frame 42, and the fixing frame 42 is used for connecting the cylinder body 311 with the supporting frame 4, so that the relative fixation of the cylinder body 311 and the supporting leg assembly 1 is realized.

In still other embodiments, as shown in fig. 10 to 13, the telescopic cylinder 31 includes a first telescopic cylinder 32 and a second telescopic cylinder 33, each of the first telescopic cylinder 32 and the second telescopic cylinder 33 includes a cylinder body 311 and a piston rod 312, the first telescopic cylinder 32 is used to drive the first sub top frame 21, the second telescopic cylinder 33 is used to drive the second sub top frame 22, the first piston rod 322 is connected to the first sub top frame 21, the second piston rod 332 is connected to the second sub top frame 22, the forklift canopy guard 100 further includes a support frame 4, the support frame 4 is connected to the leg group 1, and the cylinder body 311 is connected to the support frame 4.

Therefore, when the first piston rod 322 works, the piston rod 312 of the first telescopic cylinder 32 moves relative to the cylinder body 311 of the first telescopic cylinder 32, so as to drive the first sub top frame 21 to move, the piston rod 312 of the second telescopic cylinder 33 moves relative to the cylinder body 311 of the second telescopic cylinder 33, so as to drive the second sub top frame 22 to move, the support frame 4 is connected with the cylinder body 311 of the first telescopic cylinder 32 and the cylinder body 311 of the second telescopic cylinder 33, so as to make the first telescopic cylinder 32 and the second telescopic cylinder 33 immovable relative to the leg assembly 1, and due to the arrangement of the two telescopic cylinders 31, when the transverse size of the top frame 2 needs to be adjusted, the first telescopic cylinder 32 and/or the second telescopic cylinder 33 can work, when the first sub top frame 21 and/or the second sub top frame 22 corresponding to the first telescopic cylinder 32 and/or the second telescopic cylinder 33 move, the first sub top frame 21 and the second sub top frame 22 can move independently or simultaneously, that is, the first sub top frame 21 or the second sub top frame 22 can be driven independently to move, when making roof frame 2 can be according to the circumstances such as the regional width difference about fork truck 1000 tops, can drive solitary sub-roof frame 2 (first sub-roof frame 21 or the sub-roof frame 22 of second) motion and make fork truck 1000 can pass through, and then make fork truck 1000's overhead guard's control range bigger, make fork truck 1000's trafficability characteristic stronger.

The first telescopic cylinder 32 and the second telescopic cylinder 33 in the above embodiments may be hydraulic cylinders, one end of the first cylinder 321 connected to the first piston rod 322 is provided with a first oil port 301, the other end of the first cylinder 321 is provided with a second oil port 302, one end of the second cylinder 331 connected to the second piston rod 332 is provided with a first oil port 301, the other end of the second cylinder 331 is provided with a second oil port 302, when the transverse size of the top frame 2 needs to be widened, the second oil port 302 of the first cylinder 321 and the second oil port 302 of the second cylinder 331 are filled with oil, the first oil port 301 of the first cylinder 321 and the first oil port 301 of the second cylinder 331 are returned with oil, at least a part of the first piston rod 322 extends out of the first cylinder 321 under the action of oil pressure, and at least a part of the second piston rod 332 extends out of the second cylinder 331 under the action of oil pressure; when the transverse size of the top frame 2 needs to be adjusted to be narrow, oil enters from the first oil port 301 of the first cylinder body 321, oil enters from the first oil port 301 of the second cylinder body 331, oil returns from the second oil port 302 of the first cylinder body 321, oil returns from the second oil port 302 of the second cylinder body 331, at least one part of the first piston rod 322 retracts into the first cylinder body 321 under the action of oil pressure, at least one part of the second piston rod 332 retracts into the hydraulic oil cylinder in the second cylinder body 331 under the action of oil pressure, and the extension or contraction of the piston rod 312 is realized through the oil entering or oil returning of the oil holes, so that the stability of the hydraulic oil cylinder is good, the control is convenient, and the reliability of the forklift top protection frame 100 is enhanced.

Because the first telescopic cylinder 32 drives the first piston rod 322, the second telescopic cylinder 33 drives the second piston rod 332, the first piston rod 322 or the second piston rod 332 can be subjected to unilateral adjustment, or the movement strokes of the first piston rod 322 and the second piston rod 332 are different, so that when the top frame 2 can be in accordance with the conditions of different left and right widths of the top area of the forklift 1000, the independent sub top frame 2 (the first sub top frame 21 or the second sub top frame 22) can be driven to move to enable the forklift 1000 to pass through, the adjustment range of the top protection frame of the forklift 1000 is larger, and the passing performance of the forklift 1000 is stronger. The stability of hydraulic cylinder is good, and is convenient for control to reinforcing fork truck overhead guard 100's reliability.

In some examples, as shown in fig. 1 to 13, the number of the telescopic cylinders 31 may be multiple, the plurality of telescopic cylinders 31 are arranged at intervals in the longitudinal direction, and the arrangement of the plurality of telescopic cylinders 31 may enable the driving force of the driving mechanism 3 to the first sub top frame 21 and the second sub top frame 22 to be greater, and the distribution of the driving force is also more uniform, so that the movement of the first sub top frame 21 and the second sub top frame 22 is more smooth and reliable.

In still other embodiments, as shown in fig. 14-17, the drive mechanism 3 may include: the device comprises a power source 304, a gear 35, a first rack 36 and a second rack 37, wherein the gear 35 is connected with the output end of the power source 304, the first rack 36 and the second rack 37 are both meshed with the gear 35 and distributed on two sides of the gear 35, the first rack 36 is connected with the first sub top frame 21, and the second rack 37 is connected with the second sub top frame 22.

In some examples, the power source 304 may be a motor, and a motor shaft of the motor may be keyed with the gear 35, so that the driving force of the power source 304 may be transmitted to the gear 35, eventually driving the movement of the first sub top frame 21 and the second sub top frame 22. The motor can pass through threaded connection spare threaded connection with support frame 4 to be convenient for actuating mechanism 3 the installation on fork truck overhead guard 100, and actuating mechanism 3 can also include the motor shock pad, and the motor shock pad is connected at motor and 4 supports of support frame, thereby absorbs vibrations and the noise that the motor during operation produced, thereby promotes actuating mechanism 3's performance.

In some examples, as shown in fig. 16, the supporting frame 4 may further include two rack fixing plates 43, the rack fixing plates 43 are connected to the fixing frame 42, the two rack fixing plates 43 respectively extend in the transverse direction and are arranged at intervals in the longitudinal direction, the first rack 36 and the second rack 37 are longitudinally sandwiched between the two rack fixing plates 43, one rack fixing plate 43 is used for abutting against the first rack 36, the other rack fixing plate 43 is used for abutting against the second rack 37, and when the first rack 36 and the second rack 37 are assembled, the rack fixing plate 43 is used for longitudinally limiting the first rack 36 and the second rack 37.

Therefore, the driving mechanism 3 can drive the gear 35 to rotate through the power source 304, the gear 35 drives the rack to move, and further the movement of the first sub top frame 21 and the second sub top frame 22 is realized, and the movement directions of the first sub top frame 21 and the second sub top frame 22 can be realized by changing the forward rotation or the reverse rotation of the gear 35, because the first rack 36 and the second rack 37 are both meshed with the gear 35 and are distributed on two sides of the gear 35, when the gear 35 rotates, the first rack 36 and the second rack 37 move in opposite directions, and further the first sub top frame 21 and the second sub top frame 22 move in opposite directions, so that the first sub top frame 21 and the second sub top frame 22 can move in directions close to or far away from each other at the same time. The matching form of the gear 35 and the rack has a simple structure, is convenient to arrange, and has a simple design, so that the manufacturing cost of the forklift overhead guard 100 can be reduced.

The forklift overhead guard 100 according to the present invention includes: the forklift truck top guard comprises a first sub top frame 21, a second sub top frame 22 and a driving mechanism 3, wherein the first sub top frame 21 and the second sub top frame 22 are connected in a sliding mode along the left-right direction, the first sub top frame 21 and the second sub top frame 22 are both connected with a truck body of the forklift truck 1000, at least one of the first sub top frame 21 and the second sub top frame 22 is connected with the truck body in a sliding mode along the left-right direction, the driving mechanism 3 is connected between the first sub top frame 21 and the second sub top frame 22 and used for driving the first sub top frame 21 and the second sub top frame 22 to slide relatively along the left-right direction, and therefore the change of the transverse size of the forklift truck top guard 100 phase is achieved through the sliding of the first sub top frame 21 and/or the second sub top frame 22 along the left-right direction of the truck body, and the passing performance of the forklift truck 1000 is further enhanced.

The forklift 1000 according to the present invention has the forklift truck overhead guard 100 according to any one of the embodiments of the present invention.

Accordingly, as shown in fig. 18 and 19, the width of the top frame 2 is a, the width of the forklift 1000 is b, the height from the wheels of the forklift 1000 to the upper end of the leg group 1 is c, and the overall height of the forklift 1000 is d: when the forklift 1000 is normally running, the width of the top frame 2 and the width of the forklift 1000 may be equal, i.e., (a ═ b); when the forklift 1000 needs to pass through a narrow area at the top, the driving mechanism 3 can be operated to drive the first sub top frame 21 and the second sub top frame 22 to move towards the direction of approaching each other, so that the width of the top frame 2 is reduced, and the width of the top frame 2 is smaller than that of the forklift 1000 (namely a is smaller than b); after the forklift 1000 passes through a narrow area on the top, in order to increase the protection area of the forklift overhead guard 100, the driving mechanism 3 may be operated to drive the first sub-top frame 21 and the second sub-top frame 22 to move in the direction away from each other, so as to increase the width of the top frame 2; when the forklift 1000 needs to pass through an area with a low top height, the top frame 22 may be detached from the forklift 1000 so that the overall height of the forklift 1000 is equal to the height from the wheels of the forklift 1000 to the upper end of the leg unit 1, (i.e., c ═ d), so that the forklift 1000 can pass through the area with a low height; when the forklift 1000 enters a wide area, the top frame 2 may be mounted to the leg unit 1 so that the height from the wheels of the forklift 1000 to the upper end of the leg unit 1 is greater than the overall height of the forklift 1000 (i.e., c < d).

By providing the forklift truck 1000 according to the present invention with the forklift truck overhead guard 100 according to the present invention, the forklift truck 1000 can pass through an area with a limited space (narrower or lower) in the upper part of the forklift truck 1000 by adjusting or detaching the forklift truck overhead guard 100 as long as the area through which the wheels of the forklift truck 1000 can pass, thereby enhancing the passing ability of the forklift truck 1000 while ensuring the safety of the driver.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the invention, "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 herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A forklift overhead guard, comprising:

the supporting leg group is used for being connected with a forklift body;

the top frame comprises a first sub top frame and a second sub top frame, the first sub top frame and the second sub top frame are connected in a sliding mode along the left-right direction, the first sub top frame and the second sub top frame are both connected with the supporting leg group, and at least one of the first sub top frame and the second sub top frame is connected with the supporting leg group in a sliding mode along the left-right direction;

and the driving mechanism is connected between the first sub top frame and the second sub top frame and is used for driving the first sub top frame and the second sub top frame to relatively slide along the left-right direction.

2. The forklift overhead guard of claim 1, wherein a width of the top frame in the left-right direction is smaller than a width of the leg group in the left-right direction.

3. The forklift canopy guard of claim 1 wherein said set of outriggers comprises a plurality of outriggers, each of said outriggers comprising: the stand with locate the first sliding part of stand upper end, first sub-top frame with in the sub-top frame of second the lower extreme of at least one is equipped with the second sliding part, first sliding part with second sliding part is along left right direction sliding connection.

4. The forklift overhead guard of claim 3, wherein one of the first and second sliding portions comprises a guide rail provided with a guide groove extending in the left-right direction, and the other of the first and second sliding portions comprises a slider slidably connected with the guide rail through the guide groove.

5. The forklift overhead guard of claim 1, wherein the set of legs comprises: first landing leg, second landing leg, third landing leg, fourth landing leg, the lower extreme of the front column of first sub top frame with the upper end of first landing leg is along controlling direction sliding connection, the lower extreme of the back stand of first sub top frame with the upper end of second landing leg is along controlling direction sliding connection, the lower extreme of the front column of second sub top frame with the upper end of third landing leg is along controlling direction sliding connection, the lower extreme of the back stand of second sub top frame with the upper end of fourth landing leg is along controlling direction sliding connection.

6. The forklift canopy guard of claim 1, wherein the first sub-top frame and the second sub-top frame each comprise: the upper end of the front upright post is connected with the front end of the upper longitudinal beam, the upper end of the rear upright post is connected with the rear end of the upper longitudinal beam, and the lower end of the front upright post and the lower end of the rear upright post are respectively connected with the supporting leg group in a sliding mode in the left-right direction.

7. The forklift canopy guard of claim 6, wherein the first sub-canopy frame further comprises: one end of the guide sleeve is connected with the upper longitudinal beam of the first sub top frame, and the guide sleeve extends towards the direction close to the second sub top frame along the left-right direction;

the second sub-top frame further comprises: one end of the guide column is connected with the upper longitudinal beam of the second sub top frame, and the guide column extends towards the direction close to the first sub top frame along the left-right direction; wherein,

the guide sleeve is sleeved outside the guide post, and the guide sleeve is connected with the guide post in a sliding mode along the left and right directions.

8. The forklift overhead guard of claim 7, wherein the guide sleeve and the guide post are each plural and arranged at a spacing in a front-rear direction.

9. The forklift canopy guard according to any one of claims 1 to 8, wherein the driving mechanism comprises a telescopic cylinder, one end of the telescopic cylinder is connected to the first sub-top frame, and the other end of the telescopic cylinder is connected to the second sub-top frame.

10. The forklift canopy guard of claim 9, wherein the telescoping cylinder comprises a cylinder body and a piston rod, an end of the cylinder body facing away from the piston rod being connected to one of the first sub-head frame and the second sub-head frame, the piston rod being connected to the other of the first sub-head frame and the second sub-head frame.

11. The forklift canopy guard according to claim 9, wherein the telescopic cylinder includes a cylinder body, a first piston rod and a second piston rod, the first piston rod and the second piston rod extend out from both ends of the cylinder body, respectively, the first piston rod is connected to the first sub-top frame, and the second piston rod is connected to the second sub-top frame.

12. The forklift overhead guard of claim 11, further comprising: the support frame, the support frame with landing leg group links to each other, the cylinder body with the support frame links to each other.

13. The forklift overhead guard of claim 11, wherein the support frame comprises:

the connecting plate is connected with two rear support legs in the support leg group;

the fixing frame is connected with the connecting plate, and the cylinder body is connected with the fixing frame.

14. The forklift canopy guard according to claim 9, wherein the telescopic cylinder comprises a first telescopic cylinder and a second telescopic cylinder, the first telescopic cylinder and the second telescopic cylinder each comprise a cylinder body and a piston rod, the first piston rod is connected with the first sub-top frame, and the second piston rod is connected with the second sub-top frame;

15. The forklift canopy guard of any of claims 1-8, wherein the drive mechanism comprises:

a power source;

the gear is connected with the output end of the power source;

the first rack and the second rack are meshed with the gear and distributed on two sides of the gear, the first rack is connected with the first sub top frame, and the second rack is connected with the second sub top frame.

16. A forklift overhead guard, comprising:

the forklift comprises a first sub top frame and a second sub top frame, wherein the first sub top frame and the second sub top frame are connected in a sliding mode along the left-right direction, the first sub top frame and the second sub top frame are both connected with a forklift body, and at least one of the first sub top frame and the second sub top frame is connected with the forklift body in a sliding mode along the left-right direction;

17. A forklift truck having a forklift truck overhead guard as claimed in any one of claims 1 to 16.