阅读说明：本技术 快换控制系统、挖掘机和挖掘机机具快换控制方法 (Quick-change control system, excavator and excavator tool quick-change control method ) 是由 秦小兵 于 2019-10-30 设计创作，主要内容包括：本发明的实施例提供了一种快换控制系统、挖掘机和挖掘机机具快换控制方法,涉及挖掘机机具更换技术领域。快换控制系统包括压力源油缸、作用油缸、管路及单向阀组件。管路连接于作用油缸的无杆腔和压力源油缸之间,单向阀组件设置于管路,以使压力源油缸内的高压油流入作用油缸的无杆腔内。挖掘机包括铲斗油缸和快换控制系统,压力源油缸为铲斗油缸。通过从挖掘机的铲斗油缸向快换油缸提供压力油,以提高快换油缸中的油压,满足快换油缸的压力要求,具有补压、保压的作用,安全可靠,改善由于挖掘机的液压控制系统压力低而导致的机具脱落的问题。(The embodiment of the invention provides a quick-change control system, an excavator and an excavator implement quick-change control method, and relates to the technical field of excavator implement replacement. The quick-change control system comprises a pressure source oil cylinder, an action oil cylinder, a pipeline and a one-way valve assembly. The pipeline is connected between the rodless cavity of the action oil cylinder and the pressure source oil cylinder, and the check valve assembly is arranged on the pipeline so that high-pressure oil in the pressure source oil cylinder flows into the rodless cavity of the action oil cylinder. The excavator comprises a bucket cylinder and a quick-change control system, and the pressure source cylinder is the bucket cylinder. The pressure oil is provided for the quick-change oil cylinder from the bucket oil cylinder of the excavator, so that the oil pressure in the quick-change oil cylinder is improved, the pressure requirement of the quick-change oil cylinder is met, the effects of pressure supplementing and maintaining are achieved, safety and reliability are achieved, and the problem that machines and tools fall off due to the fact that the pressure of a hydraulic control system of the excavator is low is solved.)

1. A quick change control system is characterized by comprising a pressure source oil cylinder, an action oil cylinder, a pipeline and a one-way valve assembly;

the pipeline is connected between the rodless cavity of the action oil cylinder and the pressure source oil cylinder, and the check valve assembly is arranged on the pipeline so that high-pressure oil in the pressure source oil cylinder flows into the rodless cavity of the action oil cylinder.

2. The quick-change control system according to claim 1, characterized in that said circuit comprises a first branch (11), a second branch (12) and a third branch (13), said one-way valve assembly comprising a first one-way valve (15) and a second one-way valve (16);

first branch road (11) with the rodless chamber of pressure source hydro-cylinder is connected, second branch road (12) with the rod chamber of pressure source hydro-cylinder is connected, the one end of pressure source hydro-cylinder is kept away from in first branch road (11) with the one end that the pressure source hydro-cylinder was kept away from in second branch road (12) respectively with the first end of third branch road (13) is connected, the second end of third branch road (13) with the rodless chamber of effect hydro-cylinder is connected, first check valve (15) set up in on first branch road (11), second check valve (16) set up in on second branch road (12).

3. The quick-change control system according to claim 2, characterized in that the quick-change control system (100) further comprises a first direction-changing valve (18) and a second direction-changing valve (19), the line further comprises a fourth branch (14), a first end of the fourth branch (14) is communicated with the second branch (12), and a second end is communicated with the rod chamber of the actuation cylinder;

the first reversing valve (18) is arranged on the second branch (12) and divides the second branch (12) into a first reversing branch (121) and a second reversing branch (122), the second reversing valve (19) is arranged on the third branch (13) and the fourth branch (14) at the same time, the second reversing valve (19) divides the third branch (13) into a third reversing branch (131) and a fourth reversing branch (132), and divides the fourth branch (14) into a fifth reversing branch (141) and a sixth reversing branch (142);

the quick-change control system (100) has a first communication state and a second communication state before and after reversing, the first reversing valve (18) and the second reversing valve (19) are in a forward reversing state, the quick-change control system (100) is in the first communication state, hydraulic oil flows to the second reversing branch (122) from the first reversing branch (121), meanwhile, hydraulic oil flows to the fourth reversing branch (132) from the third reversing branch (131), hydraulic oil flows to the fifth reversing branch (141) from the sixth reversing branch (142), the first reversing valve (18) and the second reversing valve (19) are in a backward reversing state, the quick-change control system (100) is in the second communication state, hydraulic oil flows to the sixth reversing branch (142) from the third reversing branch (131), and hydraulic oil flows to the fifth reversing branch (141) from the fourth reversing branch (132), meanwhile, hydraulic oil flows from the second reversing branch (122) to the first reversing branch (121).

4. A quick-change control system according to claim 3, characterized in that the one-way valve assembly further comprises a third one-way valve (17), the second one-way valve (16) being located between the first reversing valve (18) and the third branch (13) and allowing hydraulic oil to flow from the second branch (12) to the third branch (13);

the third one-way valve (17) is arranged on the fourth branch (14), and the third one-way valve (17) is located between the first reversing valve (18) and the second reversing valve (19) and enables hydraulic oil to flow to the second branch (12) from the second reversing valve (19).

5. The quick-change control system according to claim 3, characterized in that a hydraulic control one-way valve (135) is arranged on the reversing branch four (132), the hydraulic control one-way valve (135) comprises an oil inlet and an oil outlet, the oil inlet is close to the second reversing valve (19), and the oil outlet is close to the rodless cavity of the acting cylinder;

a sub-branch (145) is arranged on the reversing branch six (142), and the sub-branch (145) is connected with the hydraulic control one-way valve (135).

6. The quick-change control system according to claim 3, characterized in that the quick-change control system (100) further comprises a control switch (185), the control switch (185) being electrically connected to both the first direction valve (18) and the second direction valve (19) and being adapted to control the direction change of the first direction valve (18) and the second direction valve (19).

7. An excavator, comprising a bucket cylinder (10) and the quick-change control system (100) as claimed in any one of claims 1 to 6, wherein the pressure source cylinder is the bucket cylinder (10).

8. The excavator according to claim 7, further comprising a quick change over, wherein the action cylinder is a quick change over cylinder (20) of the quick change over.

9. A quick change control method for an excavator tool is characterized by comprising the following steps of:

the hydraulic oil in the bucket cylinder (10) flows to a rodless cavity of the quick-change cylinder (20).

10. The excavator implement quick-change control method of claim 9, further comprising the step of replacing the cloth: reversing a hydraulic oil path between the bucket oil cylinder (10) and the quick-change oil cylinder (20);

before the direction is changed, hydraulic oil in the bucket oil cylinder (10) flows into a rodless cavity of the quick-change oil cylinder (20), and hydraulic oil in a rod cavity of the quick-change oil cylinder (20) flows back into the rodless cavity of the quick-change oil cylinder (20);

after the direction is changed, the hydraulic oil in the rodless cavity of the bucket oil cylinder (10) flows to the rod cavity of the quick-change oil cylinder (20), and the hydraulic oil in the rodless cavity of the quick-change oil cylinder (20) flows to the rod cavity of the bucket oil cylinder (10).

Technical Field

The invention relates to the technical field of replacement of machines and tools of excavators, in particular to a quick-change control system, an excavator and a quick-change control method of machines and tools of the excavator.

Background

The hydraulic excavator may be equipped with, for example: the excavator comprises machines such as a breaking hammer, a hydraulic shear, a thumb clamp and a grab bucket, so that the excavator meets the requirement of installing multifunctional machines.

The quick-change device of the existing excavator clamps the machine loosely, so that the machine has the risk of falling off.

Disclosure of Invention

The invention aims to provide a quick-change control system, an excavator and an excavator implement quick-change control method, which can enable a quick-change device of the excavator to clamp an implement and reduce the probability of the implement being disengaged.

Embodiments of the invention may be implemented as follows:

in a first aspect, an embodiment provides a quick-change control system, which includes a pressure source cylinder, an action cylinder, a pipeline and a check valve assembly;

the pipeline is connected between the rodless cavity of the action oil cylinder and the pressure source oil cylinder, and the check valve assembly is arranged on the pipeline so that high-pressure oil in the pressure source oil cylinder flows into the rodless cavity of the action oil cylinder.

In an alternative embodiment, the circuit comprises a first branch, a second branch and a third branch, and the one-way valve assembly comprises a first one-way valve and a second one-way valve;

the first branch is connected with a rodless cavity of the pressure source oil cylinder, the second branch is connected with a rod cavity of the pressure source oil cylinder, one end of the first branch, which is far away from the pressure source oil cylinder, and one end of the second branch, which is far away from the pressure source oil cylinder, are respectively connected with a first end of a third branch, a second end of the third branch is connected with a rodless cavity of the action oil cylinder, the first check valve is arranged on the first branch, and the second check valve is arranged on the second branch.

In an optional embodiment, the quick-change control system further comprises a first reversing valve and a second reversing valve, the pipeline further comprises a fourth branch, a first end of the fourth branch is communicated with the second branch, and a second end of the fourth branch is communicated with the rod cavity of the action cylinder;

the first reversing valve is arranged on the second branch and divides the second branch into a first reversing branch and a second reversing branch, the second reversing valve is simultaneously arranged on the third branch and the fourth branch, the second reversing valve divides the third branch into a third reversing branch and a fourth reversing branch and divides the fourth branch into a fifth reversing branch and a sixth reversing branch;

the quick-change control system is provided with a first communication state and a second communication state before and after reversing, the first reversing valve and the second reversing valve are in a forward reversing state, the quick-change control system is in the first communication state, hydraulic oil flows from the first reversing branch to the second reversing branch, meanwhile, hydraulic oil flows from the third reversing branch to the fourth reversing branch, hydraulic oil flows from the sixth reversing branch to the fifth reversing branch, the first reversing valve and the second reversing valve are in a backward reversing state, the quick-change control system is in the second communication state, hydraulic oil flows from the third reversing branch to the sixth reversing branch, hydraulic oil flows from the fourth reversing branch to the fifth reversing branch, and meanwhile, hydraulic oil flows from the second reversing branch to the first reversing branch.

In an alternative embodiment, the check valve assembly further comprises a third check valve located between the first directional valve and the third branch and allowing hydraulic oil to flow from the second branch to the third branch;

the third one-way valve is arranged on the fourth branch, is positioned between the first reversing valve and the second reversing valve and enables hydraulic oil to flow to the second branch from the second reversing valve.

In an optional embodiment, a hydraulic control one-way valve is arranged on the reversing branch four, the hydraulic control one-way valve comprises an oil inlet and an oil outlet, the oil inlet is close to the second reversing valve, and the oil outlet is close to a rodless cavity of the acting oil cylinder;

and a sub-branch is arranged on the reversing branch six and is connected with the hydraulic control one-way valve.

In an optional embodiment, the quick-change control system further comprises a control switch, which is electrically connected to the first direction valve and the second direction valve at the same time and is used for controlling the direction change of the first direction valve and the second direction valve.

In a second aspect, embodiments provide an excavator, including a bucket cylinder and the quick-change control system of any one of the foregoing embodiments, wherein the pressure source cylinder is the bucket cylinder.

In an optional embodiment, the excavator further comprises a quick-change device, and the acting cylinder is a quick-change cylinder of the quick-change device.

In a third aspect, an embodiment provides a quick change control method for an excavator tool, including a pressurization step:

hydraulic oil in the bucket oil cylinder flows into a rodless cavity of the quick-change oil cylinder.

In an alternative embodiment, the method further comprises the step of replacing the cloth: reversing a hydraulic oil path between the bucket oil cylinder and the quick-change oil cylinder;

before the direction is changed, the hydraulic oil in the bucket oil cylinder flows to the rodless cavity of the quick-change oil cylinder, and the hydraulic oil in the rod cavity of the quick-change oil cylinder flows back to the rodless cavity of the quick-change oil cylinder;

after the direction is changed, the hydraulic oil in the rodless cavity of the bucket oil cylinder flows to the rod cavity of the quick-change oil cylinder, and the hydraulic oil in the rodless cavity of the quick-change oil cylinder flows to the rod cavity of the bucket oil cylinder.

The beneficial effects of the embodiment of the invention include, for example:

the pressure oil is provided for the acting oil cylinder (quick-change oil cylinder of the quick-change device) from the pressure source oil cylinder (bucket oil cylinder of the excavator), and the one-way valve is arranged on the pipeline, so that the oil pressure in the acting oil cylinder is improved, and the pressure requirement of the acting oil cylinder during clamping operation is met. When the quick-change control system is applied to the excavator, pressure oil can be provided for the quick-change oil cylinder from the bucket oil cylinder, and high-pressure oil in the bucket oil cylinder flows to a rodless cavity of the quick-change oil cylinder in a one-way mode to supplement pressure for the rodless cavity of the quick-change oil cylinder. Therefore, the problem that the quick-change device of the existing excavator cannot clamp the machine tightly to cause falling is solved, and the quick-change device has the functions of pressure supplementing and maintaining, and is safe and reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a hydraulic schematic diagram of a quick-change control system provided in an embodiment of the present application;

fig. 2 is a schematic diagram of an oil path for pressurizing a quick-change oil cylinder by the quick-change control system provided in the embodiment of the present application;

fig. 3 is an oil path schematic diagram of a first communication state of the quick-change control system according to the embodiment of the present application;

fig. 4 is an oil path schematic diagram of a second communication state of the quick-change control system according to the embodiment of the present application.

Icon: 100-quick change control system; 10-bucket cylinder; 11-a first branch; 12-a second branch; 121-commutation branch one; 122-commutation branch two; 13-a third branch; 131-a third commutation branch; 132-commutation branch four; 14-a fourth branch; 141-commutation branch five; 142-commutation branch six; 145-sub branch; 15-a first one-way valve; 16-a second one-way valve; 17-a third one-way valve; 135-a pilot operated check valve; 185-a control switch; 18-a first direction valve; 19-a second reversing valve; and 20-quickly changing the oil cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.