CN2709411Y - Lift mechanism of forklife - Google Patents

Abstract

The utility model discloses a lift mechanism of a forklift, which comprises a windlass and a goods shelf which are arranged on a main door frame. The utility model also comprises movable frames respectively arranged on two borders of the main door frame, the movable frames are driven by the windlass through a wire rope to move up and down, the movable frames and the goods shelf are connected into a four bar linkage mechanism through a main rock arm and an auxiliary rock arm, one end of the main rock arm is provided with a pulley, one end of a differential chain on the pulley is connected with the movable frame, and the other end of the differential chain is connected with a chassis. The utility model has the advantages of increase of the lifting height of the goods shelf, no increase of the manufacturing cost of a forklift, balanced stress and maintenance of horizontality of the goods shelf and capacity of lowering the goods shelf to the ground.

Description

The elevation mechanism of fork truck

Technical field

The utility model belongs to a kind of elevation mechanism of fork truck.

Background technology

Fork truck is a kind of handling machinery, and it has walking and promotes the function of shelf.Usually the lifting of mechanical type fork truck is to drive the shelf up-and-down movement by winch by the steel rope on the vehicle frame, and the hoisting depth of fork truck shelf is under vehicle frame, improve the hoisting depth of shelf, will increase the volume of fork truck, increases the manufacturing cost of fork truck.

Summary of the invention

The purpose of this utility model provides a kind of volume is higher than the fork truck of vehicle frame with regard to energy lift fork car rack elevation mechanism that do not increase.

The purpose of this utility model is to realize like this, it comprises winch, the shelf of adorning on the main door frame, comprise also on two frames of main door frame that respectively the activity box of dress, activity box move up-and-down movement by winch by rope belt, activity box and shelf are connected to four-bar linkage by master rocker and secondary-rocker, the pulley of master rocker one end dress, differential chain one end on the pulley is connected with activity box, and the differential chain other end connects to ground.

The utility model is owing to master rocker, secondary-rocker, activity box and shelf constitute four-bar linkage, and master rocker not only can rise with activity box under the differential chain bar effect of pulley, and is the center rotation with the end, makes the height that promotes shelf on main door frame.If increase the height that promotes shelf, only need to increase the length of rocking arm, therefore saved the fork truck material, reduce the manufacturing cost of fork truck, also have the shelf stress balance and keep horizontality, the advantage of putting on the ground can fall in shelf.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1

Fig. 2 is that the shelf of the utility model embodiment 1 are by the right side structural representation of elevate a turnable ladder (the utility model left and right sides symmetrical configuration)

Fig. 3 is that the shelf of the utility model embodiment 1 are put down the right side structural representation of lifting

Fig. 4 is fallen the right side structural representation of putting below underframe for the shelf of the utility model embodiment 1

Fig. 5 is the right side structural representation of the utility model embodiment 2

Fig. 6 is that the shelf of the utility model embodiment 2 are by the right side structural representation of elevate a turnable ladder

Among the figure: underframe 1 wheel 2 steered wheels 3 differential chain 4 activity box 6 secondary-rockers 7 main door frame 8 winchs 9 rocker-arm links 10 hinged shelf 11 pulleys 12

Embodiment 1, with reference to Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the vehicle frame of fork truck is made up of main door frame 8 and underframe 1.Main door frame 8 is structure as a whole with underframe 1, and two wheels 2 and two steered wheels 3 are equipped with in underframe 1 bottom.Elevation mechanism is to adorn activity box 6 respectively on two frames of main door frame 8, and the winch 9 of dress is made synchronous up-and-down movement along the frame of main door frame 8 respectively by two moving activity box 6 of rope belt on the main door frame 8.Two sides of shelf 11 are fixed with the rocker-arm link 10 perpendicular with the shelf platform respectively, master rocker 5 one ends and rocker-arm link 10 are hinged, secondary-rocker 7 one ends and rocker-arm link 10 are hinged, secondary-rocker 7 other ends and activity box 6 are hinged, master rocker 5 bottoms and activity box 6 are hinged, and pivotally attached master rocker 5 and secondary-rocker 7 constitute four-bar linkage with shelf 11 on the activity box 6.Master rocker 5 other ends are equipped with pulley 12, the differential chain 4 of configuration on the pulley 12, and an end of differential chain 4 is fixed on the activity box 6, and differential chain 4 other ends are fixed on the underframe 1.Principle of work: when winch drove the activity box rising, master rocker, secondary-rocker rose with activity box; Master rocker one end is that rotate at the center with its end under the pining down of differential chain; Differential chain one end that is fixed on simultaneously on the activity box also rises with activity box, the center of turn of its master rocker is also being risen, so just increase the shelf lift, by master rocker and secondary-rocker with the shelf elevate a turnable ladder on main door frame, master rocker and secondary-rocker also can fall shelf and place on the ground.

Embodiment 2, with reference to Fig. 5, Fig. 6, embodiment 2 is the same with embodiment 1 structure, be described rocking arm pipe link 10 be to be fixed on the activity box 6, each end of master rocker 5, secondary-rocker 7 is hinged on the shelf respectively, master rocker 5 bottoms and rocking arm pipe link 10 are hinged, and secondary-rocker 7 other ends and rocking arm pipe link 10 are hinged.Because each end of master rocker 5 and secondary-rocker 7 is that level is laid on the shelf, so shelf are when being raised to vertex, and the platform of shelf remains horizontality.

Claims (3)

1, a kind of elevation mechanism of fork truck, it comprises winch, the shelf of adorning on the main door frame, it is characterized in that: also comprise on two frames of main door frame (8) respectively the activity box (6) of dress, activity box (6) by winch (9) by rope belt action up-and-down movement, activity box (6) is connected to four-bar linkage with shelf (11) by master rocker (5) and secondary-rocker (7), the pulley (12) of master rocker (5) one ends dress, differential chain (4) one ends on the pulley (12) are connected with activity box (6), and differential chain (6) other end is connected with vehicle frame (1).

2, the elevation mechanism of fork truck according to claim 1, it is characterized in that: two sides of described shelf (11) are fixed with the rocker-arm link (10) perpendicular with the shelf base plate respectively, master rocker (5) one ends and rocker-arm link (10) are hinged, secondary-rocker (7) one ends and rocker-arm link (10) are hinged, secondary-rocker (7) other end and activity box (6) are hinged, and master rocker (5) bottom and activity box (6) are hinged.

3, the elevation mechanism of fork truck according to claim 1, it is characterized in that: described rocking arm pipe link (10) is to be fixed on the activity box (6), each end of master rocker (5), secondary-rocker (7) is hinged on respectively on the shelf (11), master rocker (5) bottom and rocking arm pipe link (10) are hinged, and secondary-rocker (7) other end and rocking arm pipe link (10) are hinged.

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