Digging control system of loader-digger

Abstract

The utility model provides an excavation control system of a backhoe loader, which relates to the technical field of engineering machinery and comprises a pilot oil filter, an energy accumulator, a two-way throttle valve, a one-way throttle valve and an operation pilot handle, the oil filter is connected with the energy accumulator, the tail end of the energy accumulator is respectively connected with the operation pilot handle, the operation pilot handle is connected with the one-way throttle valve through a reversing valve, and the one-way throttle valve is connected with the reversing valve. The tail end of the one-way throttle valve is connected with the movable arm oil cylinder, the operation pilot handle is connected with the two-way throttle valve through the reversing valve, and the tail end of the two-way throttle valve is connected with the swing oil cylinder, so that linear control over lifting and descending of the movable arm is achieved, the purpose that a customer wants to adjust the movable arm or relieve pressure after flameout of a vehicle is achieved is achieved, and a pilot oil filter is additionally arranged at the oil supply rear end of the pilot pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field, concretely relates to a kind of excavator loading machine excavating control system. BACKGROUND

[0002] Excavator loading machine is controlled valve body action by operating pilot handle, so that control valve body passway is communicated with swing arm, and the action of end swing arm is realized by pressure;

[0003] The pilot control system of prior art is directly connected with valve, and only the fine control of pilot handle by operating hand can realize micro-operation, and after the vehicle is turned off, because the whole system has no pressure source, so it is impossible to realize swing arm or pressure relief after turning off. SUMMARY

[0004] To achieve the above object, one or more embodiments of the utility model provide the following technical scheme.

[0005] The utility model provides a kind of excavator loading machine excavating control system, including pilot oil filter, energy accumulator, two-way throttle valve, check throttle valve and operating pilot handle, oil filter connects energy accumulator, and the end of energy accumulator is connected operating pilot handle respectively, operating pilot handle is connected check throttle valve by reversing valve, and check throttle valve end is connected swing arm oil cylinder, operating pilot handle is connected two-way throttle valve by reversing valve, and two-way throttle valve end is connected swing cylinder.

[0006] Further setting is that operating pilot handle includes branch leg two-connection handle, left pilot handle, right pilot handle and single-connection foot valve.

[0007] Further setting is that branch leg two-connection handle, left pilot handle, right pilot handle and single-connection foot valve are connected swing arm oil cylinder and swing cylinder respectively by an oil circuit.

[0008] Further setting is that the swing cylinder includes left swing cylinder and right swing cylinder.

[0009] Further setting is that the reversing valve includes three-position eight-way electromagnetic reversing valve and three-position three-way reversing valve.

[0010] Further setting is that the three-position three-way reversing valve is connected with the middle position of three-position eight-way electromagnetic reversing valve.

[0011] Further setting is that the two side positions of three-position three-way reversing valve are connected with the middle position of three-position eight-way electromagnetic reversing valve.

[0012] Further setting is that operating pilot handle is connected with left branch leg oil cylinder, right branch leg oil cylinder, bucket rod oil cylinder and bucket oil cylinder.

[0013] Further, the left outrigger oil cylinder, the right outrigger oil cylinder, the arm oil cylinder and the bucket oil cylinder are connected with the outrigger two-handle, the left pilot handle, the right pilot handle and the single-connection foot valve respectively.

[0014] Further, the oil filter is connected with the oil tank, and the oil tank inputs oil through a pipeline to the oil filter.

[0015] The above one or more technical solutions have the following beneficial effects:

[0016] (1) The one-way throttle valve is connected with the boom pilot oil port, the oil flow is effectively controlled under the premise of ensuring the pilot oil supply, the pilot oil supply is double-controlled by the throttle valve and the operation handle, the linear control of the boom lifting and lowering is realized, and the purpose of realizing micro-control is achieved.

[0017] (2) The accumulator is added after the pilot filter, so that the accumulator pressure is used to supply oil to the pilot valve P port for a short time after the engine is turned off, the purpose of the customer to realize the boom alignment or pressure relief after the engine is turned off is met, and the pilot filter is added at the rear end of the pilot pump oil supply, so that the influence of different oil cleanliness in different regions on the pilot valve system is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the application, serve to explain the application, and do not constitute limitations to the application.

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] Figure 2 It is a side view of the utility model.

[0021] Figure 3 It is a hydraulic system diagram of the utility model.

[0022] In the figure, 1 is a pilot filter; 2 is an accumulator; 3 is a two-way throttle valve; 4 is a one-way throttle valve; 5 is an operation pilot handle; 51 is an outrigger two-handle; 52 is a left pilot handle; 53 is a right pilot handle; 54 is a single-connection foot valve; 6 is a swing oil cylinder; 7 is a boom oil cylinder; 8 is a left outrigger oil cylinder; 81 is a right outrigger oil cylinder; 9 is an arm oil cylinder; 10 is a bucket oil cylinder; 11 is an oil tank; and 12 is a reversing valve.

[0023] 5 operation pilot handle; 51 outrigger two-handle; 52 left pilot handle; 53 right pilot handle; 54 single-connection foot valve;

[0024] 6 swing oil cylinder; 7 boom oil cylinder;

[0025] 8 left outrigger oil cylinder; 81 right outrigger oil cylinder;

[0026] 9 arm oil cylinder; 10 bucket oil cylinder; 11 oil tank; and 12 reversing valve. DETAILED DESCRIPTION

[0027] The specific implementation manner of the embodiment will be described below with reference to the drawings.

[0028] A kind of excavator digging control system, refer to Figure 1 、 Figure 2 And Figure 3 , including pilot oil filter 1, accumulator 2, two-way throttle valve 3, one-way throttle valve 4 and operation pilot handle 5, oil filter is connected with accumulator 2, the end of accumulator 2 is connected with operation pilot handle 5 respectively, operation pilot handle 5 is connected with one-way throttle valve 4 by reversing valve 12, one-way throttle valve 4 is connected with swing cylinder 7 at the end, operation pilot handle 5 is connected with two-way throttle valve 3 by reversing valve, two-way throttle valve 3 is connected with swing cylinder 6 at the end.

[0029] Operation pilot handle 5 includes two-branch handle 51, left pilot handle 52, right pilot handle 53 and single-branch foot valve 54, two-branch handle 51, left pilot handle 52, right pilot handle 53 and single-branch foot valve 54 are connected with swing cylinder 7 and swing cylinder 6 respectively through an oil circuit, swing cylinder 6 includes left swing cylinder 6 and right swing cylinder 6, 0.7mm two-way throttle valve 3 is added to the pilot oil port of left and right swing cylinder 6, realize one-branch valve piece control two same type cylinder to do opposite action, and through throttle valve control flow, so that pilot oil supply is controlled by throttle valve and operation hand operation pilot handle 5 double, realize linear control of digging connecting rod mechanism when rotating around hinged sliding frame, reduce the influence of large flow fluctuation on valve core.

[0030] Reversing valve includes three-position eight-way electromagnetic reversing valve and three-position three-way reversing valve, three-position three-way reversing valve is connected with middle position of three-position eight-way electromagnetic reversing valve, three-position three-way reversing valve is connected with middle position of three-position eight-way electromagnetic reversing valve on both sides, three-position eight-way electromagnetic reversing valve and three-position three-way reversing valve available on the market are used, and the switching of electromagnetic control reversing valve is realized.

[0031] Operation pilot handle 5 is connected with left branch cylinder 8, right branch cylinder 81, boom cylinder 9 and bucket cylinder 10, left branch cylinder 8, right branch cylinder 81, boom cylinder 9 and bucket cylinder 10 are connected with two-branch handle 51, left pilot handle 52, right pilot handle 53 and single-branch foot valve 54 respectively, and the output attribute is controlled by operating two-branch handle 51, left pilot handle 52, right pilot handle 53 and single-branch foot valve 54 respectively.

[0032] Oil filter is connected with oil tank 11, oil tank 11 inputs oil through pipeline to oil filter, pilot oil filter 1 is added to oil supply end, avoid the influence of different oil cleanliness in different regions on pilot valve system, avoid the phenomenon of valve sticking, better ensure the durability and controllability of the whole vehicle, and save the difficulty and cost of maintenance.

[0033] The utility model discloses above although the specific embodiment of the utility model has been described in conjunction with the drawing, is not the limit to the protection scope of the utility model, and the person skilled in the art should understand that on the basis of the technical scheme of the utility model, various modifications or deformation that the person skilled in the art can make without paying creative labour are still within the protection scope of the utility model.

Claims

1. An excavating loader excavating control system characterized by, The pilot oil filter, accumulator, two-way throttle valve, one-way throttle valve and operation pilot handle are connected, the oil filter is connected with the accumulator, the accumulator is connected with the operation pilot handle, the operation pilot handle is connected with the one-way throttle valve through the reversing valve, the one-way throttle valve is connected with the swing arm oil cylinder, the operation pilot handle is connected with the two-way throttle valve through the reversing valve, and the two-way throttle valve is connected with the swing oil cylinder.

2. An excavating loader excavating control system according to claim 1, wherein, The operation pilot handle comprises a two-branch handle, a left pilot handle, a right pilot handle and a single-branch foot valve.

3. An excavating loader excavating control system according to claim 1, wherein, The two-branch handle, the left pilot handle, the right pilot handle and the single-branch foot valve are connected with the swing arm oil cylinder and the swing oil cylinder through an oil circuit.

4. An excavating loader excavating control system as claimed in claim 1, wherein, The swing oil cylinder comprises a left swing oil cylinder and a right swing oil cylinder.

5. An excavating loader excavating control system as claimed in claim 1, wherein, The reversing valve comprises a three-position eight-way electromagnetic reversing valve and a three-position three-way reversing valve.

6. An excavating loader excavating control system according to claim 5, wherein, The three-position three-way reversing valve is connected with the middle position of the three-position eight-way electromagnetic reversing valve.

7. An excavating loader excavating control system as claimed in claim 1, wherein, The two side positions of the three-position three-way reversing valve are connected with the middle position of the three-position eight-way electromagnetic reversing valve.

8. An excavating loader excavating control system according to claim 1 wherein, The operation pilot handle is connected with a left outrigger oil cylinder, a right outrigger oil cylinder, a boom oil cylinder and a bucket oil cylinder.

9. An excavating loader excavating control system as claimed in claim 1, wherein, The left outrigger oil cylinder, the right outrigger oil cylinder, the boom oil cylinder and the bucket oil cylinder are connected with the two-branch handle, the left pilot handle, the right pilot handle and the single-branch foot valve.

10. An excavating loader excavating control system as claimed in claim 1, wherein, The oil filter is connected with an oil tank.

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