Connecting rod type forklift working device

Abstract

The utility model relates to a connecting rod type forklift working device which comprises a pallet fork assembly and a connecting rod mechanism connected with the pallet fork assembly. The connecting rod mechanism is composed of a supporting base, two lifting arms, two lifting oil cylinders, two rear vertical arms, two front vertical arms, two pull rods and two adjusting oil cylinders, short supporting lugs and high supporting lugs which are symmetrical in pairs are arranged at the two ends of the supporting base, and a cross brace is arranged between the two lifting arms; the upper ends of the two lifting arms are hinged to the two short supporting lugs on the supporting base respectively, one ends of the two lifting oil cylinders are hinged to the two ends of the supporting base respectively, and the other ends of the two lifting oil cylinders are hinged to the middles of the two lifting arms respectively. The lower ends of the two rear vertical arms are respectively hinged with the lower parts of the two lifting arms; the lower ends of the two front vertical arms are respectively hinged with the lower ends of the two lifting arms; one ends of the two pull rods are hinged to the upper ends of the two front vertical arms respectively, and the other ends of the two pull rods are hinged to the upper ends of the two rear vertical arms respectively. The forklift is compact in structure, small in occupied space, high in loading and unloading speed and particularly suitable for fork loading operation in some special environments.

Description

Technical Field

[0001] The utility model relates to a forklift, in particular to a connecting rod type forklift working device. Background Art

[0002] As a kind of handling machinery, forklifts are widely used in warehouses, cargo yards, docks and other places, which improves the efficiency of material handling. Telescopic arm forklifts are currently widely used. For example, "a telescopic arm forklift with 360-degree arbitrary rotation" disclosed in CN 106115564A includes a forklift body and a telescopic arm device, and also includes a rotary joint, the rotary joint includes a relatively rotatable guide shaft and a rotary sleeve, the guide shaft is fixedly connected to the lower frame, the rotary sleeve is fixedly connected to the upper frame, an oil inlet channel, an air inlet channel and an inlet channel are provided in the guide shaft, an oil outlet channel, an air outlet channel and an outlet channel are provided in the rotary sleeve, an oil-liquid docking mechanism, an electric docking mechanism and a gas docking mechanism are provided between the guide shaft and the rotary sleeve, the oil-liquid docking mechanism is arranged between the oil inlet channel and the oil outlet channel, the electric docking mechanism is arranged between the inlet channel and the outlet channel, and the gas docking mechanism is arranged between the inlet channel and the outlet channel. In this way, the upper frame can rotate arbitrarily relative to the lower frame. During the rotation of the upper frame relative to the lower frame, the rotating electrical connection of the oil and electricity can be achieved through the rotary joint, which can ensure the stable operation of the telescopic forklift. The telescopic arm forklift working device organically combines the telescopic arm structure of the truck crane with the loading and unloading function of the traditional forklift. The length and amplitude angle of the telescopic arm can be changed by the oil cylinder drive to achieve the required working height and distance. The telescopic arm forklift working device has outstanding characteristics such as flexibility, convenience, and high efficiency, and has gradually formed a universal series of products. However, for some forklift working environments (such as lateral loading and unloading of goods in train carriages), the forklift working device is required to occupy a small space and have a fast loading and unloading speed, but the telescopic arm forklift working device is still used for operation, which is relatively inefficient. Therefore, it is necessary to develop a special forklift working device that can be applied to certain forklift working environments.

[0003] CN 106429984A discloses a "forklift working device", which includes a gantry, a rotator is provided on the gantry, the rotator is slid up and down on the gantry through sliding parts on both sides, a fork frame is provided on the rotator, the fork frame is rotatably provided on the gantry through the rotator, the lower end of the fork frame is connected to the rotator, a push-pull cylinder is provided between the upper end of the fork frame and the rotator, two sliding guide devices are provided on the fork frame, a distance adjustment device is provided between the two sliding guide devices, each sliding guide device is connected to a fork, a plurality of bending sections for adjusting the shape of the fork are provided on the fork, and fastening bolts are provided at both ends of the bending sections. The forklift working device is easy to operate and maintain, has high production efficiency, low operating cost, can be used for multiple purposes, and reduces the repeated purchase of user equipment. Undoubtedly, the technical solution disclosed in the patent document is a beneficial attempt in the relevant technical field. Utility Model Content

[0004] The utility model aims to provide a connecting rod type forklift working device, which has a compact structure, occupies a small space, has a fast loading and unloading speed, and is particularly suitable for forklift operations in certain special environments.

[0005] The utility model discloses a linkage type forklift working device, comprising a fork assembly, wherein the fork assembly is connected with a linkage mechanism; the linkage mechanism is composed of a support seat, two lifting arms, two lifting cylinders, two rear vertical arms, two front vertical arms, two pull rods and two adjusting cylinders; two symmetrical short support ears and high support ears are arranged at the two ends of the support seat, and a plurality of cross braces are arranged between the two lifting arms; the upper ends of the two lifting arms are respectively hinged with the two short support ears on the support seat, and ... One end of the lifting cylinder is hinged to the two ends of the support seat, and the other end is hinged to the middle part of the two lifting arms; the lower ends of the two rear vertical arms are hinged to the lower parts of the two lifting arms; the lower ends of the two front vertical arms are hinged to the lower ends of the two lifting arms; one end of the two pull rods is hinged to the upper ends of the two front vertical arms, and the other end is hinged to the upper ends of the two rear vertical arms; one end of the two adjusting cylinders is hinged to the two high support ears on the support seat, and the other end is hinged to the upper parts of the two rear vertical arms.

[0006] Furthermore, the support seat of the connecting rod mechanism is fixedly connected to the forklift frame by screws, and the two front vertical arms of the connecting rod mechanism are connected to the fork assembly.

[0007] Furthermore, the fork assembly includes a fork connecting frame, a fork side shift shaft arranged on the upper part of the fork connecting frame, a fork connected to the fork side shift shaft, a fork side shift cylinder connected to the fork connecting frame at one end and the fork at the other end, and a fork locking member hingedly connected to the door frame for locking the fork.

[0008] Furthermore, the fork assembly also includes a portal frame connected to the fork connecting frame at the rear side, and a fork connecting frame lifting cylinder with one end hinged to the fork connecting frame and the other end hinged to the portal frame.

[0009] Furthermore, it also includes a mast rotating shaft with one end inserted into the shaft hole on the mast and the other end fixedly connected to the mounting frame through a flange, a mast rotating oil cylinder with two ends respectively hinged to the fork connecting frame through a pin shaft and the middle part hinged to the mast through a pin shaft, and the mast rotating oil cylinder is a double-acting hydraulic oil cylinder. The rear side of the mounting frame is fixedly connected to the two front vertical arms of the connecting rod mechanism.

[0010] Compared with the required technology, the utility model has the following advantages:

[0011] The use of a connecting rod mechanism makes the forklift's working device compact and occupies little space, making it particularly suitable for forklift operations in certain special environments (such as lateral loading and unloading of goods in train carriages).

[0012] Since the cylinder drives the connecting rod mechanism to rotate around the hinge point to achieve rapid lifting and amplitude change of the gantry fork, the action is simple and fast. At the same time, the lifting and rotation of the fork are achieved through the gantry and rotating shaft on the fork, and the loading and unloading speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is one of the structural diagrams of the fork assembly;

[0015] Figure 3 This is the second structural diagram of the fork assembly.

[0016] In the figure (technical features indicated by marks):

[0017] 1-fork assembly, 10-gantry, 11-fork side shift shaft, 12-fork, 13-fork side shift cylinder, 14-fork locking member, 15-mounting frame, 16-fork connecting frame lifting cylinder, 17-gantry rotation shaft, 18-gantry rotation cylinder, 19-fork connecting frame;

[0018] 20—support seat, 21—low support ear, 22—high support ear, 23—lifting arm, 24—cross brace, 25—lifting cylinder, 26—rear vertical arm, 27—front vertical arm, 28—pull rod, 29—adjusting cylinder. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0020] See also Figure 1 , Figure 2 and Figure 3The working device of a linkage forklift shown in the figure comprises a fork assembly 1, wherein the fork assembly 1 is connected with a linkage mechanism; the linkage mechanism is composed of a support seat 20, two lifting arms 23, two lifting cylinders 25, two rear vertical arms 26, two front vertical arms 27, two pull rods 28 and two adjusting cylinders 29. Two symmetrical short support ears 21 and high support ears 22 are arranged at the two ends of the support seat 20, and a plurality of cross braces 24 are arranged between the two lifting arms 23; the upper ends of the two lifting arms 23 are respectively hinged to the two short support ears 21 on the support seat 20, and the two lifting arms 23 are respectively hinged to the two short support ears 21 on the support seat 20. One end of the lifting oil cylinder 25 is respectively hinged to the two ends of the support seat 20, and the other end is respectively hinged to the middle of the two lifting arms 23; the lower ends of the two rear vertical arms 26 are respectively hinged to the lower parts of the two lifting arms 23; the lower ends of the two front vertical arms 27 are respectively hinged to the lower ends of the two lifting arms 23; one end of the two pull rods 28 is respectively hinged to the upper ends of the two front vertical arms 27, and the other end is respectively hinged to the upper ends of the two rear vertical arms 26; one end of the two adjusting oil cylinders 29 is respectively hinged to the two high ears 22 on the support seat 20, and the other end is respectively hinged to the upper parts of the two rear vertical arms 26. The support seat, lifting arm, rear vertical arm, front vertical arm and pull rod are all made of high-strength plate welding.

[0021] The support seat 20 of the connecting rod mechanism is fixedly connected to the forklift frame by screws, and the two front vertical arms 27 of the connecting rod mechanism are connected to the fork assembly 1.

[0022] The fork assembly 1 includes a fork connecting frame 19, a fork side shift shaft 11 disposed on the upper portion of the fork connecting frame, a fork 12 connected to the fork side shift shaft, a fork side shift oil cylinder 13 connected to the fork connecting frame at one end and the fork at the other end, and a fork locking member 14 hingedly connected to the fork connecting frame for locking the fork. By controlling the extension and retraction of the fork side shift oil cylinder, the fork can be moved left and right along the fork side shift shaft, and the lateral position of the fork can be adjusted, so as to facilitate quick and effective alignment and insertion of goods.

[0023] The fork assembly 1 also includes a gantry 10 connected to the fork connecting frame 19 at the rear side, and a fork connecting frame lifting cylinder 16 hinged to the gantry 10 at one end and hinged to the fork connecting frame 19 at the other end. The fork connecting frame can be pushed up and down to slide by controlling the telescopic movement of the gantry lifting cylinder.

[0024] It also includes a mast rotating shaft 17 with one end inserted into the shaft hole on the mast 10 and the other end fixedly connected to the mounting frame 15 through a flange, and a mast rotating oil cylinder 18 with both ends respectively hinged to the mounting frame 15 through a pin and the middle part hinged to the mast 10 through a pin. The mast rotating oil cylinder 18 is a double-acting hydraulic oil cylinder. By controlling the left and right extension of the mast rotating oil cylinder, the mast is driven to rotate left and right, and then the fork connecting frame also rotates with the mast. The rear side of the mounting frame 15 is fixedly connected to the two front vertical arms 27 of the connecting rod mechanism.

[0025] The use process of this utility model:

[0026] Fork leveling; two tie rods 28, two lifting arms 23, two adjusting cylinders 29 and two lifting cylinders 23 constitute a double parallelogram leveling mechanism; in the process of controlling the lifting cylinders 23 to extend and drive the lifting arms 23 to change the amplitude and lift, the adjusting cylinders 29 can be controlled to extend and drive the tie rods 28 at the same time, so that the tie rods 28 are always kept in a vertical state, thereby realizing the leveling of the forks 12;

[0027] Fork flipping; by controlling the extension and contraction of the oil cylinder 29, the angle of the fork assembly 1 can be changed;

[0028] The fork rotates; by controlling the left and right extension of the mast rotation cylinder 18, the mast 10 is driven to rotate left and right, and the fork connecting frame 19 also rotates with the mast;

[0029] Fork movement; by controlling the extension and contraction of the fork side shift cylinder 13, the fork 12 can be moved left and right along the fork side shift axis 11, and the lateral position of the fork 12 can be adjusted to facilitate quick and effective alignment of the inserted goods;

[0030] The fork connecting frame is lifted; by controlling the extension and retraction of the fork connecting frame lifting cylinder 16, the fork connecting frame 19 can be pushed up and down to slide;

[0031] By controlling the extension and retraction of the lifting cylinder 25, the elevation and pitching of the lifting arm 23 can be achieved.

Claims

1. A linkage type forklift working device, comprising a fork assembly (1), characterized in that: The fork assembly (1) is connected with a connecting rod mechanism; the connecting rod mechanism is composed of a support seat (20), two lifting arms (23), two lifting cylinders (25), two rear vertical arms (26), two front vertical arms (27), two pull rods (28) and two adjusting cylinders (29); two symmetrical short support ears (21) and high support ears (22) are provided at two ends of the support seat (20); a plurality of cross braces (24) are provided between the two lifting arms (23); the upper ends of the two lifting arms (23) are respectively hinged to the two short support ears (21) on the support seat (20); one end of the two lifting cylinders (25) is hinged to the two short support ears (21) on the support seat (20); One end of each of the two rear arms (26) is hinged to the lower part of the two lifting arms (23); the lower end of each of the two front arms (27) is hinged to the lower end of the two lifting arms (23); one end of each of the two pull rods (28) is hinged to the upper end of each of the two front arms (27) and the other end is hinged to the upper end of each of the two rear arms (26); one end of each of the two adjusting oil cylinders (29) is hinged to the two high support ears (22) on the support base (20) and the other end is hinged to the upper part of each of the two rear arms (26).

2. The linkage type forklift working device according to claim 1, characterized in that: The support seat (20) of the connecting rod mechanism is fixedly connected to the forklift frame by means of screws, and the two front upright arms (27) of the connecting rod mechanism are connected to the fork assembly (1).

3. The linkage type forklift working device according to claim 1 or 2, characterized in that: The fork assembly (1) comprises a fork connecting frame (19), a fork side shift shaft (11) arranged on the upper part of the fork connecting frame, a fork (12) connected to the fork side shift shaft, a fork side shift cylinder (13) connected to the fork connecting frame at one end and the fork at the other end, and a fork locking member (14) hingedly connected to the fork connecting frame for locking the fork.

4. The linkage type forklift working device according to claim 3 is characterized in that: The fork assembly (1) further comprises a door frame (10) connected to the fork connecting frame (19) at the rear side, and a fork connecting frame lifting cylinder (16) hinged to the door frame (10) at one end and hinged to the fork connecting frame (19) at the other end.

5. The linkage type forklift working device according to claim 4, characterized in that: It also includes a gantry rotating shaft (17) with one end inserted into the shaft hole on the gantry (10) and the other end fixedly connected to the mounting frame (15) through a flange, and a gantry rotating oil cylinder (18) with two ends respectively hinged to the mounting frame (15) through a pin and a middle part hinged to the gantry (10) through a pin. The gantry rotating oil cylinder (18) is a double-acting hydraulic oil cylinder, and the rear side of the mounting frame (15) is fixedly connected to the two front vertical arms (27) of the connecting rod mechanism.

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