Hydraulic device for bucket rod oil cylinder of excavator

Abstract

The utility model belongs to the technical field of excavator hydraulic systems, and particularly relates to an excavator bucket rod oil cylinder hydraulic device which mainly comprises a multi-way valve, an oil outlet steel pipe, an oil outlet rubber pipe, a confluence block, a confluence block support, a hydraulic rubber pipe and a connection relation of the multi-way valve, the oil outlet steel pipe and the hydraulic rubber pipe. A part of hydraulic oil of the second bucket rod valve element and hydraulic oil of the first bucket rod valve element are combined, and then the combined hydraulic oil and the other part of hydraulic oil of the second bucket rod valve element are combined, so that the pressure loss of a large cavity of a bucket rod oil cylinder in the operation process of an excavator can be obviously reduced, and the working efficiency is improved; the whole structural design is ingenious, the structure is reasonable, using is convenient, practicability is high, and the using effect is the best especially on the machine types of 20 T or above.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems for excavators, in particular to a hydraulic device for a bucket cylinder of a medium or large excavator of 20 tons or above. Background Art

[0002] During excavator operation, the boom cylinder is used most frequently, and the large chamber of the boom cylinder requires a larger flow rate. Under the same pipe diameter conditions, the greater the flow rate, the greater the pressure loss. Therefore, reducing the pressure loss in the excavator boom cylinder circuit is very important and has certain economic benefits. Reducing pressure loss can reduce the output power of the engine, thereby reducing the operating fuel consumption of the excavator and improving the operating efficiency of the excavator. The common boom cylinder hydraulic circuit of 20T and above excavators is that the oil output of the No. 2 valve core is combined with the oil output of the No. 1 valve core through the internal channel of the multi-way valve and then supplied to the boom cylinder. The new excavator boom cylinder hydraulic circuit is based on this and adds an external merging channel to the large chamber oil circuit of the boom cylinder. This channel is smoother than the internal channel of the multi-way valve, which can significantly reduce the pressure loss of the hydraulic circuit. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems existing in the background technology, and for this purpose, a hydraulic device for an excavator bucket cylinder is provided.

[0004] In order to achieve the above purpose, the technical solutions adopted by this utility model are as follows:

[0005] A hydraulic device for an excavator arm cylinder, comprising a multi-way valve, an oil outlet steel pipe, an oil outlet rubber hose, a confluence block and a hydraulic hose;

[0006] The multi-way valve includes a No. 1 valve core of the bucket arm and a No. 2 valve core of the bucket arm;

[0007] The first oil outlet end of the No. 2 valve core of the bucket arm is connected to the first oil outlet end of the No. 1 valve core of the bucket arm and is connected to the confluence block through an oil outlet steel pipe;

[0008] The first oil outlet end of the No. 2 valve core of the boom is connected to the confluence block through an oil outlet hose;

[0009] The merging block is connected to the extended end of the boom cylinder through a hydraulic hose.

[0010] The following is a technical solution further defined by the present invention: the merging block is fixedly mounted on a merging block bracket, and the merging block bracket is fixedly mounted on an outer side wall of a valve body of the multi-way valve.

[0011] The following is a technical solution further defined by the present utility model. An internal merging channel is provided in the multi-way valve. The first oil outlet end of the boom No. 2 valve core is connected to the first oil outlet end of the boom No. 1 valve core through the internal merging channel. The internal merging channel is connected to the merging block through an oil outlet steel pipe.

[0012] The following is a technical solution further defined by the present invention, in which the second oil outlet end of the No. 2 valve core of the boom is connected to the second oil outlet end of the No. 1 valve core of the boom and is connected to the retraction end of the boom cylinder.

[0013] The following is a technical solution further defined by the present invention, in which the second oil inlet end of the No. 2 valve core of the boom is connected to the second oil inlet end of the No. 1 valve core of the boom.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] The utility model merges a part of the hydraulic oil of the bucket arm valve core No. 2 with the hydraulic oil of the bucket arm valve core No. 1, and then merges the merged hydraulic oil with another part of the hydraulic oil of the bucket arm valve core No. 2, which can significantly reduce the pressure loss of the large cavity of the bucket arm cylinder during the operation of the excavator and improve the work efficiency. The overall structural design is ingenious, reasonable, easy to use and highly practical, and the use effect is best especially for models of 20T and above.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a circuit connection principle diagram of the utility model.

[0020] Figure numerals: 1. Multi-way valve; 2. Oil outlet hose; 3. Junction block; 4. Hydraulic hose; 5. Junction block bracket; 6. Oil outlet steel pipe; 7. No. 2 valve core of boom; 8. No. 1 valve core of boom. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0023] like Figure 1 As shown, this embodiment provides a hydraulic device for an excavator boom cylinder, which mainly includes a multi-way valve 1, an oil outlet steel pipe 6, an oil outlet rubber hose 2, a merging block 3, a merging block bracket 5 and a hydraulic hose 4.

[0024] The multi-way valve 1 includes arm valve core 1 (spool 8), arm valve core 2 (spool 7), and an internal converging channel. In this embodiment, arm valve core 1 (spool 8) is a four-way hydraulically controlled directional valve with a first oil inlet, a second oil inlet, a first oil outlet, and a second oil outlet. In this embodiment, arm valve core 2 (spool 7) is a four-way hydraulically controlled directional valve with a first oil inlet, a second oil inlet, a first oil outlet, and a second oil outlet.

[0025] like Figure 2As shown, the first oil outlet of arm valve core 2 7 is connected to the first oil outlet of arm valve core 1 8 via an internal merging channel; the internal merging channel is connected to merging block 3 via an oil outlet steel pipe 6; the first oil outlet of arm valve core 2 7 is connected to merging block 3 via an oil outlet hose 2; and merging block 3 is connected to the extension end of the arm cylinder via a hydraulic hose 4. Therefore, when the excavator is operating, a portion of the hydraulic oil output from the first oil outlet of arm valve core 2 7 merges with the hydraulic oil output from the first oil outlet of arm valve core 1 8 through the internal merging channel of the multi-way valve 1, and then connects to merging block 3 via an oil outlet steel pipe 6; the other portion of the hydraulic oil output from the first oil outlet of arm valve core 2 7 is connected to merging block 3 via an oil outlet hose 2. The two hydraulic oils merge inside merging block 3 and are then connected to the arm cylinder via a hydraulic hose 4, causing the arm cylinder to extend, thereby reducing pressure loss in the arm cylinder hydraulic circuit. In addition, the merging block 3 is fixed to the multi-way valve 1 through the merging block bracket 5 to reduce the impact and vibration caused during the operation of the excavator, and also facilitate the assembly of the external merging pipeline.

[0026] like Figure 2 As shown, the second oil outlet of arm valve spool No. 2 7 is connected to the second oil outlet of arm valve spool No. 1 8 and is also connected to the retraction end of the arm cylinder. Therefore, when the excavator is not operating, the hydraulic oil output from the second oil outlet of arm valve spool No. 2 7 and the second oil outlet of arm valve spool No. 1 8 merge and flow into the arm cylinder, causing the arm cylinder to retract.

[0027] Furthermore, an oil inlet end of the boom valve core No. 2 7 is connected to an oil inlet end of the boom valve core No. 1 8 .

[0028] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the methods and technical content disclosed above to make many possible variations and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any equivalent variations based on the shape, structure, and principle of the present invention that do not depart from the content of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A hydraulic device for an excavator arm cylinder, characterized in that: It comprises a multi-way valve (1), an oil outlet steel pipe (6), an oil outlet rubber hose (2), a confluence block (3) and a hydraulic hose (4); The multi-way valve (1) comprises a boom No. 1 valve core (8) and a boom No. 2 valve core (7); The first oil outlet end of the No. 2 valve core (7) of the boom is connected to the first oil outlet end of the No. 1 valve core (8) of the boom and is connected to the merging block (3) through the oil outlet steel pipe (6); The first oil outlet end of the No. 2 valve core (7) of the boom is connected to the merging block (3) via an oil outlet hose (2); The merging block (3) is connected to the extended end of the boom cylinder via a hydraulic hose (4).

2. The hydraulic device of the bucket cylinder of an excavator according to claim 1, characterized in that: The merging block (3) is fixedly mounted on a merging block bracket (5), and the merging block bracket (5) is fixedly mounted on the outer side wall of the valve body of the multi-way valve (1).

3. The hydraulic device of an excavator arm cylinder according to claim 1, characterized in that: An internal merging channel is provided in the multi-way valve (1); the first oil outlet end of the No. 2 valve core (7) of the boom is connected to the first oil outlet end of the No. 1 valve core (8) of the boom via the internal merging channel; and the internal merging channel is connected to the merging block (3) via an oil outlet steel pipe (6).

4. The hydraulic device of an excavator arm cylinder according to claim 1, characterized in that: The second oil outlet end of the boom valve core No. 2 (7) is communicated with the second oil outlet end of the boom valve core No. 1 (8) and is connected to the retracted end of the boom oil cylinder.

5. The hydraulic device of the bucket cylinder of an excavator according to claim 1, characterized in that: The second oil inlet end of the boom No. 2 valve core (7) is connected to the second oil inlet end of the boom No. 1 valve core (8).

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