CN110775897A

CN110775897A - Improved lifting forklift and using method thereof

Info

Publication number: CN110775897A
Application number: CN201911194481.3A
Authority: CN
Inventors: 郑旭钦
Original assignee: Quanzhou Polk New Material Technology Co Ltd
Current assignee: Quanzhou Polk New Material Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-11

Abstract

The invention relates to an improved lifting forklift and a using method thereof, and the improved lifting forklift comprises a movable rack, wherein the upper part of the rack is provided with a parallelogram mechanism, the rear end of the parallelogram mechanism is hinged with a support frame, the parallelogram mechanism is driven by an electric cylinder to realize front end lifting, the rear part of the support frame is provided with a detachable power supply used for supplying power to the electric cylinder, and the front end of the parallelogram mechanism is provided with a pair of fork frames with adjustable intervals. This improved generation fork truck compact structure to can adjust fork frame width according to the user demand. The improved lifting forklift is compact in structure, convenient for battery replacement, capable of adjusting the width of the fork frame according to use requirements, and simple in use method.

Description

Improved lifting forklift and using method thereof

Technical Field

The invention relates to an improved lifting forklift and a using method thereof.

Background

Fork lift truck is often used to carry the equipment of terrace grinder, but current fork lift truck has following defect:

1. the side frames on the rack are obliquely arranged, so that the stress intensity borne by the connecting points of the side frames and the main bracket is high when the side frames are used, and the side frames are easy to bend when a lifting forklift loads goods with large weight;

2. the mounting frame for mounting the fork frame on the parallelogram mechanism consists of two vertical rods, has low strength and is easy to deform when loading goods with larger weight;

3. when the storage battery of the forklift is replaced, the whole mounting plate needs to be dismounted, so that the dismounting difficulty is increased;

4. the fork frame can not adjust the width of the fork frame according to the width of the carried goods, and the application range of the forklift is limited.

For this reason, there is a need for an improved lift truck.

Disclosure of Invention

The invention aims to provide an improved lifting forklift and a using method thereof, the improved lifting forklift is compact in structure, convenient for battery replacement, capable of adjusting the width of a fork according to use requirements, and simple in using method.

The technical scheme of the invention is as follows: the improved lifting forklift comprises a movable rack, wherein a parallelogram mechanism is arranged on the upper portion of the rack, the rear end of the parallelogram mechanism is hinged to a support frame, the front end of the parallelogram mechanism is driven by an electric cylinder to lift, a detachable power supply used for supplying power to the electric cylinder is arranged on the rear portion of the support frame, and a pair of fork frames with adjustable intervals are arranged at the front end of the parallelogram mechanism.

Further, the support frame comprises a main support, a pair of support rods which extend forwards and are used for avoiding the fork frame are arranged on the lower portion of the main support, a wheel carrier is arranged at the rear end of the main support, rollers are arranged at the front ends of the support rods and the wheel carrier respectively, and the support frame is arranged between the wheel carrier and a side frame which is obliquely arranged on the rear upper portion of the main support.

Further, parallelogram mechanism includes the first body of rod, the second body of rod, the third body of rod and the fourth body of rod of end to end articulated in proper order, the middle part of the first body of rod is articulated with the piston rod of electric cylinder, the lower extreme of the second body of rod links firmly with the rear side upper portion of frame, is provided with the push rod of rotatable regulation on the second body of rod.

Further, the middle part of the first rod body is provided with an avoiding groove, a seat shell of the electric cylinder is hinged to the rack, and a telescopic rod of the electric cylinder penetrates through the avoiding groove to be hinged to a hinged seat arranged on the first rod body.

Furthermore, the third rod piece comprises a connecting seat hinged with the upper end of the second rod piece, the upper part of the connecting seat is connected with an adjusting rod piece through a locking nut, the upper end of the adjusting rod piece is hinged with a hinged seat arranged at the upper end of the fourth rod piece, and the fourth rod piece is provided with a reinforcing member.

Further, the hinged end of push rod is provided with the limiting plate, be provided with the arc wall on the limiting plate, the circular arc center of arc wall and the articulated center coincidence of push rod, wear to be equipped with the locking member who passes the arc wall on the second body of rod, the rear end of push rod is provided with the bar.

Further, the detachable power source comprises a mounting plate, a shaft rod rotatably connected with the rear portion of the rack is fixed to the middle of the mounting plate, a mounting plate locking component is arranged on the side portion of the mounting plate, a vertical sliding rail is arranged on the rear side face of the mounting plate, a storage battery is connected to the rear side face of the mounting plate in a sliding mode, and a sliding limiting structure is arranged on the upper portion of the storage battery.

Furthermore, a mounting frame is arranged on the lower portion of the front end of the parallelogram mechanism, an adjusting plate is transversely arranged on the mounting frame, sliding grooves in the horizontal direction are respectively formed in two side portions of the adjusting plate, and the rear end of the fork frame is fixedly connected with the sliding grooves through a fastening mechanism.

Furthermore, the fork frame is an L-shaped fork frame consisting of a vertical frame and a horizontal frame, the vertical frame is fixedly fixed on the adjusting plate through a fastening mechanism, and a reinforcing member is fixed at a connecting part of the vertical frame and the horizontal frame.

A use method applied to an improved lifting forklift comprises the following steps:

(1) adjusting the height of the push rod according to the elevation of a user, and adjusting the distance between the forks according to the width of the article to be carried;

(2) controlling the electric cylinder to enable the parallelogram mechanism to drive the fork frame to descend to the lowest position;

(3) pushing the forklift to a position where the article needs to be moved and carried, and enabling the fork frame to extend into the lower side of the article needing to be moved and carried;

(4) controlling the electric cylinder to lift the parallelogram mechanism and lift the article to be carried by the fork;

(5) pushing the forklift to a position required to be carried, and putting down articles;

(6) when the detachable power supply for supplying power is out of power, the detachable power supply is detached and replaced.

Compared with the prior art, the invention has the following advantages: the improved forklift has a compact structure and high strength, and is more labor-saving in use compared with the existing forklift; meanwhile, the battery is more convenient to replace, the battery replacement difficulty is reduced, the width of the fork frame can be adjusted according to the use requirement, and meanwhile, the use method is simple.

Drawings

FIG. 1 is a first schematic structural diagram of the present invention;

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

FIG. 3 is a schematic structural diagram of the push rod of the present invention;

FIG. 4 is an enlarged view of the connection structure of the push rod and the second rod member according to the present invention;

FIG. 5 is a schematic diagram of a lever force configuration of a prior art fork lift truck;

FIG. 6 is a schematic diagram of the lever force configuration of the lift truck of the present invention;

FIG. 7 is a schematic view of the detachable power supply of the present invention after rotation;

FIG. 8 is a schematic view of a detachable power supply connection structure according to the present invention;

in the figure: 10-electric cylinder 100-frame 110-main support 111-support rod 112-side frame 120-wheel carrier 130-roller 131-parking structure 140-support frame 150-reinforced cross bar 200-parallelogram mechanism 210-first rod 211-avoidance groove 212-hinged seat 220-second rod 230-third rod 231-connecting seat 232-adjusting rod 240-fourth rod 241-hinged seat 242-reinforcing member 250-push rod 251-limiting plate 252-arc groove 253-handrail rod 254-hinged bolt 255-hinged nut 256-locking bolt 257-locking nut 300-detachable power supply 310-mounting plate 311-convex plate 312-locking bolt 313-vertical slide rail 320- The shaft rod 330, the storage battery 331, the sliding groove 332, the limiting block 400, the fork 401, the vertical frame 402, the horizontal frame 403, the reinforcing member 410, the mounting frame 420, the adjusting plate 421, the sliding groove 431, the fastening bolt 432 and the fastening nut.

Detailed Description

In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.

Refer to fig. 1 to 8

An improved lifting forklift comprises a movable rack 100, wherein a parallelogram mechanism 200 with the rear end hinged with a support frame and the front end lifted and lowered by the driving of an electric cylinder 10 is arranged on the upper part of the rack, and a detachable power supply 300 for supplying power to the electric cylinder is arranged on the rear part of the support frame, so that a storage battery is detached and replaced after the storage battery is not electrified. The front end of the parallelogram mechanism is provided with a pair of yokes 400 whose interval is adjustable so that the distance between the yokes is adjusted according to the width of goods.

In the existing forklift, the support frame mainly comprises a main support and a wheel frame, wherein the main support and the wheel frame are formed by side frames and support rods, and the side frames are directly inclined backwards and upwards, so that the stress intensity of the connection points of the side frames and the main support is high, and the side frames are easy to bend when the forklift loads goods with large weight.

In this application, the supporting frame includes a main frame 110, a pair of support rods 111 extending forward and used for avoiding the fork are disposed at a lower portion of the main frame, a wheel frame 120 is disposed at a rear end of the main frame, rollers 130 are disposed at front ends of the support rods and the wheel frame, respectively, and a supporting frame 140 is disposed between the wheel frame and a side frame 112 obliquely upward and rearward of the main frame. Therefore, the strength of the side frame is improved through the support frame, a triangular stable structure is formed among the wheel frame, the side frame and the support frame, and the strength of the rack, particularly the strength of the side frame, is effectively improved.

In this embodiment, the roller wheels mounted on the wheel carrier are universal wheels, and the parking structure 131 is disposed on the universal wheels, so that the direction of the forklift can be adjusted through the universal wheels, and the parking action of the forklift can be completed through the parking structure.

In this embodiment, the parallelogram mechanism includes a first rod 210, a second rod 220, a third rod 230, and a fourth rod 240, which are sequentially hinged from head to tail, the middle of the first rod is hinged to a piston rod of an electric cylinder, the lower end of the second rod is fixedly connected to the upper portion of the rear side of the frame, and a rotatably adjustable push rod 250 is disposed on the second rod. And connecting lines between the hinge point of the second rod body and the first rod body and between the hinge point of the second rod body and the hinge point of the third rod body are always in a vertical state, and the fourth rod body is vertical to the horizontal plane.

In this embodiment, in order to make fork truck more laborsaving when lifting the goods, the rear end of the first body of rod is articulated mutually with the lower extreme of the second body of rod, and the middle part of the first body of rod is provided with dodges the groove 211, the seat shell of electric jar is articulated mutually with the frame, and the telescopic link of electric jar passes dodges the groove and articulates with articulated seat 212 that sets up on the first body of rod mutually.

The reason is as follows: the power provided by the electric cylinder is F1, the gravity (resistance) of the loaded cargo is F2, the length of the power arm between the hinge point of the first rod and the second rod and the electric cylinder is L1, and the length of the first rod (resistance arm) is L2, according to the lever principle, i.e., F1 × L1= F2 × L2. Compared with the existing forklift, in use, when F2 of the forklift is the same, X1 is the same, namely L2 of the forklift at the same height position is the same, L1 of the improved forklift is larger than L1 'of the existing forklift, so F1 of the forklift is smaller than F1' of the existing forklift, and the forklift is more labor-saving than the existing forklift. See fig. 5, 6.

In this embodiment, in order to facilitate installation and adjustment of the length of the third rod, the third rod includes a connecting seat 231 hinged to the upper end of the second rod, the upper portion of the connecting seat is connected to an adjusting rod 232 through a locking nut, and the upper end of the adjusting rod is hinged to a hinge seat 241 disposed at the upper end of the fourth rod. The fourth rod is provided with a reinforcing member 242, so that the strength of the fourth rod is effectively improved.

In this embodiment, in order to adjust the angle of push rod, the hinged end of push rod is provided with limiting plate 251, be provided with arc wall 252 on the limiting plate, the arc center of arc wall and the coincidence of the hinged center of push rod, wear to be equipped with the locking member who passes the arc wall on the second body of rod, the rear end of push rod is provided with bar 253.

In this embodiment, in order to better complete the adjustment and locking of the push rod, the push rod is fixedly hinged to the second rod body through a hinge bolt 254 and a hinge nut 255, and the push rod can rotate around the central axis of the hinge bolt. The locking member comprises a locking bolt 256, one end of the locking bolt is provided with a second rod body and an arc-shaped groove, and the other end of the locking bolt is provided with a locking nut 257, so that the push rod is locked through the locking nut.

In this embodiment, the detachable power supply includes a mounting plate 310, a shaft rod 320 rotatably connected to the rear portion of the rack is fixed to the middle portion of the mounting plate, a mounting plate locking member is disposed on the side portion of the mounting plate, a vertical slide rail 313 is disposed on the rear side surface of the mounting plate, a storage battery 330 is slidably connected to the rear side surface of the mounting plate, and a sliding limiting structure is disposed on the upper portion of the storage battery.

Because the battery is vertical state under the normal use state, if directly upwards take out the battery, then can be blockked by the side bearer of frame, the route of upwards taking out is restricted, and need dismantle the battery under the vertical state and change, then need lift whole mounting panel off, increased the dismouting degree of difficulty. And in this application, can be directly through unclamping mounting panel locking member, the rotatory mounting panel lets the battery slope, can lift the battery off from the mounting panel this moment, has effectively reduced the required process of dismouting battery and the degree of difficulty, is favorable to the quick replacement of battery.

In this embodiment, the axle rod passes through a reinforcing cross bar 150 fixed to the lower portion of the rear side of the frame and is locked by nuts, which rotationally connects the axle rod to the reinforcing cross bars on the side frames. The mounting plate locking member comprises a convex plate 311 arranged on the upper side part of the mounting plate, and a locking bolt 312 in locking connection with the machine frame penetrates through the convex plate; the sliding limiting structure comprises a sliding groove 331 which is arranged on the storage battery and is in sliding fit with the vertical sliding rail, and a limiting block 332 which is positioned on the upper portion of the sliding groove is fixed on the storage battery, so that the storage battery is limited by the limiting block to continue to move downwards, and the storage battery is hung on the mounting plate. The accumulator is connected with the electric cylinder through a plug so as to supply power for a motor of the electric cylinder.

In this embodiment, a mounting frame 410 is disposed at the lower portion of the front end of the parallelogram mechanism, and the mounting frame is located at the lower side of the fourth rod and is integrally formed with the fourth rod. An adjusting plate 420 is transversely arranged on the mounting frame, a pair of horizontally-oriented sliding grooves 421 are respectively arranged at two side parts of the adjusting plate, and the rear end of the fork frame is fixedly connected with the sliding grooves through a fastening mechanism. The distance between the forks is adjusted by adjusting the position of the forks on the sliding grooves.

In this embodiment, for better connection with the adjusting plate, the fork is an L-shaped fork consisting of a vertical frame 401 and a horizontal frame 402, and the vertical frame is fixed on the adjusting plate through a fastening mechanism. The reinforcing member 403 is fixed to the connection portion of the vertical and horizontal frames, thereby improving the strength of the fork.

In this embodiment, the fastening mechanism includes a fastening bolt 431 passing through the chute and the vertical frame, and a fastening nut 432 is screwed to the fastening bolt.

It will be apparent to those skilled in the art that the above-described embodiments of the invention are merely preferred embodiments of the invention, and that various modifications, changes, substitutions and alterations can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The improved forklift comprises a movable rack and is characterized in that a parallelogram mechanism is arranged on the upper portion of the rack, the rear end of the parallelogram mechanism is hinged to a support frame, the front end of the parallelogram mechanism is driven by an electric cylinder to lift, a detachable power supply used for supplying power to the electric cylinder is arranged on the rear portion of the support frame, and a pair of fork frames with adjustable intervals are arranged at the front end of the parallelogram mechanism.

2. An improved forklift as claimed in claim 1, wherein said supporting frame includes a main frame, a pair of supporting rods extending forward and used for avoiding the fork are provided at a lower portion of said main frame, a wheel carrier is provided at a rear end of said main frame, rollers are provided at a front end of said supporting rods and said wheel carrier, respectively, and a supporting frame is provided between said wheel carrier and a side frame obliquely upward and rearward of said main frame.

3. An improved forklift as claimed in claim 1 or 2, wherein said parallelogram mechanism comprises a first rod body, a second rod body, a third rod body and a fourth rod body which are sequentially hinged end to end, the middle part of said first rod body is hinged with the piston rod of the electric cylinder, the lower end of said second rod body is fixedly connected with the upper part of the rear side of the frame, and a push rod which can be rotatably adjusted is arranged on the second rod body.

4. An improved forklift as claimed in claim 3, wherein the middle of the first rod is provided with an avoiding slot, the seat shell of the electric cylinder is hinged to the frame, and the telescopic rod of the electric cylinder passes through the avoiding slot to be hinged to the hinged seat arranged on the first rod.

5. An improved fork lift truck according to claim 3, wherein said third bar comprises a connecting seat hinged to the upper end of the second bar, an adjusting bar is connected to the upper part of said connecting seat via a locking nut, the upper end of said adjusting bar is hinged to a hinged seat provided at the upper end of the fourth bar, and said fourth bar is provided with a reinforcement member.

6. The improved lifting forklift as recited in claim 3, wherein the hinged end of the push rod is provided with a limiting plate, the limiting plate is provided with an arc-shaped groove, the arc center of the arc-shaped groove coincides with the hinged center of the push rod, the second rod body is provided with a locking member penetrating through the arc-shaped groove, and the rear end of the push rod is provided with a grab bar.

7. The improved forklift as recited in claim 1, wherein the detachable power source comprises a mounting plate, a shaft rod rotatably connected with the rear part of the frame is fixed in the middle of the mounting plate, a mounting plate locking member is arranged on the side part of the mounting plate, a vertical slide rail is arranged on the rear side surface of the mounting plate and is slidably connected with a storage battery, and a sliding limiting structure is arranged on the upper part of the storage battery.

8. An improved lifting forklift as claimed in claim 1, 2, 4, 5, 6 or 7, wherein the lower part of the front end of said parallelogram mechanism is provided with a mounting frame, said mounting frame is provided with a laterally adjustable plate, two side parts of said adjustable plate are respectively provided with a horizontally oriented chute, and the rear end of said fork is fixedly connected with said chute via a fastening mechanism.

9. An improved fork lift truck according to claim 7, wherein said fork is an L-shaped fork comprising a vertical frame and a horizontal frame, said vertical frame being fixed to said adjustable plate by a fastening mechanism, and a reinforcing member being fixed to the connecting portion between said vertical frame and said horizontal frame.

10. The use method of the improved forklift applied to the claim 3 is characterized by comprising the following steps: