CN218058346U - Forklift gantry forward-moving oil cylinder structure - Google Patents

Abstract

The utility model discloses a fork truck gantry forward oil cylinder structure, which comprises a double oil cylinder mechanism and a hydraulic mechanism; double cylinder mechanism includes reverse flexible first hydro-cylinder and second hydro-cylinder, wherein: the telescopic end of the first oil cylinder is pivoted on the vehicle body, and the telescopic end of the second oil cylinder is pivoted on the gantry; the hydraulic mechanism comprises a first oil path and a second oil path; wherein: one end of the first oil path is connected to an oil inlet of an upper cavity of the first oil cylinder, the other end of the first oil path is connected to an oil inlet of an upper cavity of the second oil cylinder, one end of the second oil path is connected to an oil inlet of a lower cavity of the first oil cylinder, and the other end of the second oil path is connected to an oil inlet of a lower cavity of the second oil cylinder. The utility model discloses utilize two flexible opposite direction's hydro-cylinders to combine together, under the prerequisite that does not change the installation distance, greatly increased the portal antedisplacement distance, do not influence fork truck overall stability. The two oil cylinders can be simply welded by the original oil cylinder, and the oil cylinder is convenient to manufacture and low in cost. The hydraulic mechanism with two oil paths is connected into the main high-pressure oil path of the forklift, so that the connection is reliable and the maintenance cost is low.

Description

Forklift gantry forward-moving oil cylinder structure

Technical Field

The utility model relates to a fork truck makes the field, specifically is a fork truck portal antedisplacement hydro-cylinder structure.

Background

The front and back movement of the gantry of the forklift is realized by a forward moving oil cylinder structure. The existing forward oil cylinder structure is generally provided with an oil cylinder between a portal support and a vehicle body, and the portal is driven to move by the extension and contraction of the oil cylinder. Because the whole vehicle trafficability characteristic of the forklift needs to be considered, the whole forklift design tends to be compact, the smaller the front suspension distance is, the more favorable the lifting of the longitudinal stability is, the smaller the mounting distance (the distance between the portal frame and the vehicle body) of the forward moving oil cylinder is, and therefore the following problems are solved:

to ensure that the forward movement distance is large enough, the stroke of the forward movement oil cylinder is large enough, and therefore, a large installation distance is required. The existing single oil cylinder cannot solve the contradiction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fork truck portal antedisplacement hydro-cylinder structure to solve the problem that proposes in the above-mentioned background art, adopt two hydro-cylinder combinations of flexible opposite direction, can adapt to less installation distance, can satisfy again that the antedisplacement is apart from big enough.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a fork truck portal antedisplacement hydro-cylinder structure, includes:

double cylinder mechanism, double cylinder mechanism includes reverse flexible first hydro-cylinder and second hydro-cylinder, wherein: the telescopic end of the first oil cylinder is pivoted on the vehicle body, the telescopic end of the second oil cylinder is pivoted on the gantry support, and the non-telescopic ends of the first oil cylinder and the second oil cylinder are fixedly connected together;

the hydraulic mechanism comprises a first oil way and a second oil way; wherein: one end of the first oil way is connected to an upper cavity oil inlet of the first oil cylinder, the other end of the first oil way is connected to an upper cavity oil inlet of the second oil cylinder, one end of the second oil way is connected to a lower cavity oil inlet of the first oil cylinder, and the other end of the second oil way is connected to a lower cavity oil inlet of the second oil cylinder.

As a further aspect of the present invention: the hydraulic mechanism further comprises two connectors which are respectively connected to the first oil path and the second oil path, and the oil inlet end of each connector is connected with the vehicle body main oil path.

As a further aspect of the present invention: the double-oil-cylinder mechanism further comprises a supporting plate and a sliding block, one end of the supporting plate is fixedly connected with the second oil cylinder, the other end of the supporting plate is fixedly connected with the sliding block, and the sliding block can freely slide on the upper end face of the portal support.

As a further aspect of the present invention: the bottom of the sliding block is of a hemispherical structure.

As a further aspect of the present invention: the double-oil-cylinder mechanism further comprises a connecting plate fixed at the non-telescopic ends of the first oil cylinder and the second oil cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses utilize two flexible opposite direction's hydro-cylinders to combine together, under the prerequisite that does not change the installation distance, greatly increased the portal antedisplacement distance, do not influence fork truck overall stability. The two oil cylinders can be simply welded by the original oil cylinder, and the oil cylinder is convenient to manufacture and low in cost. The hydraulic mechanism with two oil paths is connected into the main high-pressure oil path of the forklift, so that the connection is reliable and the maintenance cost is low.

Drawings

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

FIG. 2 is a top view of the door frame mounted on the cart body of the present invention;

FIG. 3 is a top view of the door frame mounted on the vehicle body of the present invention moving forward;

FIG. 4 is a partial enlarged view of the middle joint of the present invention;

in the figure: the hydraulic control system comprises a 1-double oil cylinder mechanism, 11-a first oil cylinder, 12-a second oil cylinder, 13-a supporting plate, 14-a sliding block, 15-a connecting plate, 2-a hydraulic mechanism, 21-a first oil way, 22-a second oil way, 23-a connector, 231-a first oil outlet, 232-an oil inlet, 233-a second oil outlet, a 3-portal support, a 4-vehicle body and a 5-portal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the products of the present invention are used, and are only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or communication connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, in an embodiment of the present invention, a forklift mast forward-moving cylinder structure includes a dual-cylinder mechanism 1, a hydraulic mechanism 2, and a mast support 3. Wherein:

the double-cylinder mechanism 1 includes a first cylinder 11 and a second cylinder 12 which are opposite in telescopic direction, wherein: the telescopic end of the first oil cylinder 11 is pivoted on the vehicle body 4, the telescopic end of the second oil cylinder 12 is pivoted on the gantry support 3, and the non-telescopic ends of the first oil cylinder 11 and the second oil cylinder 12 are fixedly connected together through a connecting plate 15 so as to ensure that the telescopic directions of the two oil cylinders are always parallel. The gantry 5 is vertically arranged on the gantry support 3, and when the two oil cylinders are contracted, the length directions of the two oil cylinders and the gantry 5 form a certain inclined included angle so as to utilize the limited installation distance to the maximum extent. After the two oil cylinders extend, the included angle between the length direction of the two oil cylinders and the 5 supports of the portal frame is enlarged and tends to be vertical.

The hydraulic mechanism 2 includes a first oil passage 21, a second oil passage 22, and a joint 23; wherein: one end of the first oil path 21 is connected to an upper chamber oil inlet of the first oil cylinder 11, the other end is connected to an upper chamber oil inlet of the second oil cylinder 12, and one end of the second oil path 22 is connected to a lower chamber oil inlet of the first oil cylinder 11, and the other end is connected to a lower chamber oil inlet of the second oil cylinder 12. The communication between the hydraulic mechanism 2 and the vehicle body main oil way system is realized through a joint 23.

Further, the joint 23 is a T-shaped three-way joint, and the three-way joint has a first oil outlet 231, an oil inlet 232, and a second oil outlet 233, wherein the first oil outlet 231 and the second oil outlet 233 are connected to the first oil path 21 or the second oil path 22 for communication, and the oil inlet 232 is connected to the forklift general high-pressure oil path system.

Further, the double-cylinder mechanism 1 further comprises a support plate 13 and a slide block 14, one end of the support plate 13 is fixedly connected with the second cylinder 12, the other end of the support plate is fixedly connected with the slide block 14, and the slide block 14 can freely slide on the upper end surface of the gantry support 3. Two oil paths in the hydraulic mechanism 2 are arranged on one side of the two oil cylinders, an eccentric structure is integrally formed, and the eccentric structure is supported by the supporting plate 13 and the sliding block 14 and is guaranteed to be always horizontal in the movement process. The bottom end face of the sliding block 14 is hemispherical, so that the supporting effect is achieved, and the friction resistance between the sliding block 14 and the portal support 3 can be reduced.

The utility model discloses when carrying out the antedisplacement motion, fork truck high pressure oil circuit gets into in the second oil circuit 22 through an oil inlet 232 that connects 23, and then gets into the cavity of resorption of two hydro-cylinders simultaneously, promotes the extension of hydro-cylinder piston rod to promote portal support 3 along the track forward motion, install portal 5 forward motion on portal support 3. When the forklift moves backwards, the high-pressure oil path of the forklift enters the first oil path 21 through the oil inlet 232 of the other joint 23, and then simultaneously enters the upper cavities of the two oil cylinders to push the piston rods of the oil cylinders to be recovered, so that the portal support 3 is pulled to move backwards along the rail, and the portal 5 mounted on the portal support 3 moves backwards. During the whole back and forth movement process, the slide block 14 supports the double-cylinder mechanism 1 and the hydraulic mechanism 2 to smoothly slide on the upper end surface of the portal support 3.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all the equivalent changes made within the scope of the claims of the present application are the protection scope of the claims of the present application.

Claims (5)

1. The utility model provides a fork truck portal antedisplacement hydro-cylinder structure which characterized in that includes:

double-cylinder mechanism (1), double-cylinder mechanism (1) is including reverse flexible first hydro-cylinder (11) and second hydro-cylinder (12), wherein: the telescopic end of the first oil cylinder (11) is pivoted on the vehicle body (4), the telescopic end of the second oil cylinder (12) is pivoted on the portal support (3), and the non-telescopic ends of the first oil cylinder (11) and the second oil cylinder (12) are fixedly connected together;

a hydraulic mechanism (2), the hydraulic mechanism (2) comprising a first oil path (21), a second oil path (22); wherein: one end of the first oil path (21) is connected to an upper cavity oil inlet of the first oil cylinder (11), the other end of the first oil path is connected to an upper cavity oil inlet of the second oil cylinder (12), and one end of the second oil path (22) is connected to a lower cavity oil inlet of the first oil cylinder (11) and the other end of the second oil path is connected to a lower cavity oil inlet of the second oil cylinder (12).

2. The forklift mast advancing cylinder structure according to claim 1, wherein the hydraulic mechanism (2) further comprises two joints (23) respectively connected to the first oil path (21) and the second oil path (22), and an oil inlet end of the joint (23) is connected to a main oil path of the body (4).

3. The forklift mast advancing cylinder structure according to claim 1, wherein the double cylinder mechanism (1) further comprises a support plate (13) and a slide block (14), one end of the support plate (13) is fixedly connected with the second cylinder (12), the other end of the support plate is fixedly connected with the slide block (14), and the slide block (14) can freely slide on the upper end surface of the mast support (3).

4. The forklift mast advancing cylinder structure according to claim 3, characterized in that the bottom of the slide block (14) is of a hemispherical structure.

5. The forklift mast advancing cylinder structure according to claim 1, wherein the double cylinder mechanism (1) further comprises a connecting plate (15) fixed to the non-telescopic ends of the first cylinder (11) and the second cylinder (12).

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