CN214884017U

CN214884017U - Excavator accessory operation logic switching system and excavator

Info

Publication number: CN214884017U
Application number: CN202120527507.8U
Authority: CN
Inventors: 杨家国; 李勇强; 秦勇; 张龙; 白晶; 张欣
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-11-26
Anticipated expiration: 2031-03-12

Abstract

The utility model provides an excavator accessory operation logic switched systems and excavator belongs to the excavator field. The excavator accessory operation logic switching system comprises: the left operating handle, the right operating handle, the main control valve and the eight-way reversing valve; the eight-way reversing valve is connected between the left operating handle and the main control valve and used for switching the flow direction of an oil path; and four input oil ports of the eight-way reversing valve are connected with the left operating handle, and four output oil ports of the eight-way reversing valve are connected with the main control valve. The mutual switching of the two operation logics can be realized by switching the position of the valve core of the eight-way reversing valve.

Description

Excavator accessory operation logic switching system and excavator

Technical Field

The utility model relates to a mechanical engineering field specifically relates to an excavator operation logic switched systems and excavator.

Background

Two kinds of excavators with different operation logics are available in the market, and the difference is reflected in that the actions of the excavator accessories controlled by the left operation handle are different. The excavator left operating handle with the first operation logic controls the outer swing of the excavator forearm in a forward pushing mode, controls the inner contraction of the excavator forearm in a backward pushing mode, controls the left rotation of the excavator upper body in a left pushing mode, and controls the right rotation of the excavator upper body in a right pushing mode. The left operating handle of the excavator with another operation logic is pushed forwards to control the right rotation of the upper body of the excavator, pushed backwards to control the left rotation of the upper body of the excavator, pushed leftwards to control the outer swing of the small arm of the excavator, and pushed rightwards to control the inner retraction of the small arm of the excavator. The operation logics of the right operating handle of the excavator with the two operation logics are the same, namely the right operating handle pushes forwards to control the large arm of the excavator to descend, the left operating handle pushes backwards to control the large arm of the excavator to ascend, the left operating handle pushes inwards to control the bucket of the excavator to retract, and the right operating handle pushes rightwards to control the bucket of the excavator to swing outwards, but the actions of excavator accessories controlled by the forward pushing, the backward pushing, the left pushing and the right pushing operation actions of the left operating handle of the excavator with the two operation logics are different, and the specific actions are shown in the following table:

left operating handle actuation	First kind of operation logic	Second kind of operation logic
			Push forward	Outer swing of forearm	Upper vehicle body right turning
Back push	Adduction of forearm	Left rotation of upper vehicle body
			Push left	Left rotation of upper vehicle body	Outer swing of forearm
Push right	Upper vehicle body right turning	Adduction of forearm

TABLE 1

The control oil circuit of the operating handle of the existing excavator is formed by supplying oil to an electromagnetic valve by a pilot pump, then supplying the oil to the operating handle, and then directly controlling a main control valve by the operating handle, so that only one operating logic from the operating handle to the main control valve can be realized, and the oil circuit can not be reversed under the condition of not additionally installing other devices to meet the operating logics of the two excavators, thereby not meeting the condition that an excavator operator with different habits operates the same excavator.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an excavator accessory operation logic switching system and excavator, this excavator accessory operation logic switching system and excavator can realize the switching of the different operation logics of same excavator.

In order to realize the above-mentioned purpose, the embodiment of the utility model provides an excavator accessory operation logic switched systems, excavator accessory operation logic switched systems includes left operating handle, right operating handle and master control valve, excavator accessory operation logic switched systems is still including connecting the eight switching-over valves that lead to between left operating handle and master control valve, eight switching-over valves that lead to are used for the switching of oil circuit flow direction, four input hydraulic fluid ports and the left operating handle of eight switching-over valves are connected, four output hydraulic fluid ports and the master control valve of eight switching-over valves are connected.

Optionally, the eight-way reversing valve has a first valve position and a second valve position; when a valve core of the eight-way reversing valve is positioned at a first valve position, an oil path controlled by the left operating handle in a backward pushing mode is connected with an inner arm retracting oil path controlled by the main control valve, an oil path controlled by the left operating handle in a forward pushing mode is connected with an outer arm swinging oil path controlled by the main control valve, an oil path controlled by the left operating handle in a right pushing mode is connected with an upper vehicle body right rotating oil path controlled by the main control valve, and an oil path controlled by the left operating handle in a left pushing mode is connected with an upper vehicle body left rotating oil path controlled by the main control valve;

when the valve core of the eight-way reversing valve is located at the second valve position, the oil path controlled by the left operating handle in a backward pushing mode is connected with the left rotary oil path of the upper vehicle body controlled by the main control valve, the oil path controlled by the left operating handle in a forward pushing mode is connected with the right rotary oil path of the upper vehicle body controlled by the main control valve, the oil path controlled by the left operating handle in a right pushing mode is connected with the inner arm containing oil path controlled by the main control valve, and the oil path controlled by the left operating handle in a left pushing mode is connected with the outer arm swinging oil path controlled by the main control valve.

Optionally, the four input oil ports of the eight-way reversing valve are an input port a, an input port B, an input port C and an input port D; the input port A, the input port B, the input port C and the input port D are respectively connected with an oil path for forward pushing control of a left operating handle, an oil path for right pushing control of the left operating handle, an oil path for backward pushing control of the left operating handle and an oil path for left pushing control of the left operating handle;

the four output oil ports of the eight-way reversing valve are an A1 output port, a B1 output port, a C1 output port and a D1 output port; the A1 output port, the B1 output port, the C1 output port and the D1 output port are respectively connected with a small arm outward swinging oil way, an upper vehicle body right rotating oil way, a small arm inward contracting oil way and an upper vehicle body left rotating oil way;

when the valve core of the eight-way reversing valve is positioned at a first valve position, the input port A, the input port B, the input port C and the input port D of the eight-way reversing valve are respectively communicated with the output port A1, the output port B1, the output port C1 and the output port D1;

when the valve core of the eight-way reversing valve is located at the second valve position, the input port A, the input port B, the input port C and the input port D of the eight-way reversing valve are respectively communicated with the output port B1, the output port C1, the output port D1 and the output port A1.

Optionally, a buffer valve group is connected between the right operating handle and the main control valve.

Optionally, a buffer valve group is connected between the eight-way reversing valve and the main control valve.

Optionally, the right operating handle and the eight-way reversing valve are respectively connected with the main control valve through independent buffer valves.

Optionally, the eight-way reversing valve is a manual two-position eight-way reversing valve.

Optionally, the eight-way reversing valve is a two-position eight-way hydraulic control reversing valve or a two-position eight-way magnetic reversing valve.

On the other hand, the utility model provides an excavator, be provided with on the excavator as above the excavator accessory operation logic switching system.

According to the technical scheme, an eight-way reversing valve is integrated in an oil circuit system controlled by a left operating handle of the excavator, the oil circuit flow direction of the eight-way reversing valve at different valve positions is preset, when a valve core of the eight-way reversing valve is located at a first valve position, the oil circuit controlled by the left operating handle meets the oil circuit flow direction of the first operating logic, when the valve core of the eight-way reversing valve is located at a second valve position, the oil circuit controlled by the left operating handle meets the oil circuit flow direction of the second operating logic, and the mutual switching of the two operating logics can be realized by switching the position of the valve core of the eight-way reversing valve.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:

fig. 1 is a schematic flow diagram of an oil path of an excavator according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an oil path connection in which a valve element of an eight-way directional valve is located at a first valve position in an operation logic switching system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an oil path connection in which a valve element of an eight-way directional valve is located at a second valve position in an operation logic switching system according to an embodiment of the present invention;

figure 4 is an eight-way reversing valve bitmap provided by one embodiment of the present invention.

Description of the reference numerals

1-right operating handle oil-way channel 2-right operating handle oil-way channel

3-left operating handle oil-way passage

100-left operating handle

101-oil path for left operating handle push-back control 102-oil path for left operating handle push-forward control

103-oil path controlled by right push of left operating handle 104-oil path controlled by left push of left operating handle

110-Right operating handle

111-oil path for push-back control of right operating handle 112-oil path for push-forward control of right operating handle

113-oil path for right push control of right operating handle 114-oil path for left push control of right operating handle

120-main control valve

121-small arm outward swing oil path 122-small arm inward contraction oil path

123-upper vehicle body right rotary oil path 124-upper vehicle body left rotary oil path

125-big arm ascending oil path 126-big arm descending oil path

127-bucket swing oil path 128-bucket retraction oil path

130-buffer valve group

140-eight-way reversing valve

141-A input port 142-B input port

143-C input port 144-D input port

145-A1 outlet 146-B1 outlet

147-C1 outlet 148-D1 outlet

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

In the embodiment of the present invention, when the direction words such as "push forward, push backward, push left and push right" are used without any explanation, the operation state of the operator sitting in the cab for operating the operating handle is used as a reference.

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

In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may for example be fixedly connected, detachably connected, or integrally connected; 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, the present embodiment provides a schematic flow direction diagram of an excavator oil path. The schematic diagram includes a pilot pump, a solenoid valve, an operating handle, a logic directional valve, a buffer valve group 130, a main control valve 120 and a working accessory.

As shown in fig. 1 and fig. 2, the excavator accessory operation logic switching system provided by the present invention comprises an operating handle, a logic directional control valve and a main control valve 120, wherein the operating handle comprises a left operating handle 100 and a right operating handle 110, and the logic directional control valve is an eight-way directional control valve 140.

As shown in fig. 1, the P3 pilot pump supplies oil to the solenoid valve and then to the operating handle in the excavator accessory operating logic switching system, the oil path of the operating handle is finally applied to the main control valve 120, and the oil path controlled by the main control valve 120 drives the operating accessories to operate. As shown in fig. 1, the oil path from the operating handle to the main control valve 120 can be divided into three paths:

the first channel is a right operating handle oil path channel 1, and is an oil path channel for directly acting the oil path controlled by the right operating handle 110 on the main control valve 120;

the second channel is a right operating handle oil path channel 2, an oil path controlled by the right operating handle 110 passes through the buffer valve group 130 and then serves as an oil path channel of the main control valve 120, and the purpose is that the instant impact of hydraulic oil in the oil path on the main control valve 120 after passing through the buffer valve group 130 is reduced, so that the whole oil path system controlled by the right operating handle 110 is more stable;

the third channel is the left operating handle oil path channel 3, and the oil path controlled by the left operating handle 100 passes through the eight-way reversing valve 140 and then serves as the oil path channel of the main control valve 120. The oil path flow directions of the eight-way reversing valve 140 at different valve positions are preset, and the valve positions are switched by changing the valve core position of the eight-way reversing valve 140, so that the oil path flow direction controlled by the left operating handle 100 is changed, and finally the switching of the excavator accessory operating logic is realized.

Optionally, the left operating handle oil path channel 3 passes through the eight-way reversing valve 140, and then is connected to the buffer valve bank 130, and then is used as the main control valve 120. The purpose is that the instantaneous impact of the hydraulic oil in the oil path to the main control valve 120 after passing through the buffer valve group 130 is reduced, so that the oil path system controlled by the left operating handle 100 is overall more stable.

Referring to fig. 2 and 3, there are shown oil circuit connection diagrams of two operation logics of the excavator accessory operation logic switching system according to an alternative embodiment of the present invention.

As shown in fig. 2, 3 and 4, four oil paths controlled by the left operating handle 100 are respectively connected to four input oil ports of the eight-way directional valve 140, four output oil ports of the eight-way directional valve 140 are respectively connected to four oil paths controlled by the main control valve 120 (oil paths controlling the operation of the excavator forearm and the rotation of the upper body), the four input oil ports of the eight-way directional valve 140 are respectively an a input port 141, a B input port 142, a C input port 143 and a D input port 144, and the four output oil ports of the eight-way directional valve 140 are respectively an a1 output port 145, a B1 output port 146, a C1 output port 147 and a D1 output port 148.

Preferably, four oil paths output by the eight-way reversing valve 140 may pass through the buffer valve bank 130 and then be connected to the main control valve 120.

Fig. 2 is a schematic diagram of the oil circuit connection of the eight-way selector valve 140 with the spool in the first position. As shown in fig. 2, when the eight-way reversing valve 140 is located at the first valve position, the four oil paths controlled by the left operating handle 100 are connected as follows:

the oil path 101 for controlling the backward pushing of the left operating handle is connected with the C input port 143 of the eight-way reversing valve 140, the C input port 143 of the eight-way reversing valve 140 is communicated with the C1 output port 147, and the C1 output port 147 is connected with the small arm inward-retracting oil path 122 controlled by the main control valve 120 after passing through the buffer valve group 130, so that the backward pushing operation of the left operating handle 100 is realized to control the inward retracting action of the small arm of the excavator;

the oil path 102 controlled by the forward pushing of the left operating handle is connected with an input port 141A of the eight-way reversing valve 140, the input port 141A of the eight-way reversing valve 140 is communicated with an output port 145A 1, and the output port 145A 1 is connected with the arm swing oil path 121 controlled by the main control valve 120 after passing through the buffer valve group 130, so that the forward pushing operation of the left operating handle 100 is realized to control the arm swing action of the excavator;

the oil path 103 controlled by the left operating handle by pushing to the right is connected with the B input port 142 of the eight-way reversing valve 140, the B input port 142 of the eight-way reversing valve 140 is communicated with the B1 output port 146, and the B1 output port 146 is connected with the upper vehicle body right rotary oil path 123 controlled by the main control valve 120 after passing through the buffer valve group 130, so that the left operating handle 100 is operated by pushing to the right to control the right rotary motion of the upper vehicle body of the excavator;

the left operation handle left push control oil path 104 is connected with a D input port 144 of the eight-way reversing valve 140, the D input port 144 of the eight-way reversing valve 140 is communicated with a D1 output port 148, and the D1 output port 148 is connected with an upper vehicle body left rotation oil path 124 controlled by the main control valve 120 after passing through the buffer valve group 130, so that the left operation handle 100 left push operation is realized to control the left rotation of the upper vehicle body of the excavator accessory.

Optionally, the oil path output by the eight-way reversing valve 140 may not pass through the buffer valve group 130, and is directly connected to the oil path corresponding to the main control valve 120.

Optionally, part of the oil path output by the eight-way reversing valve 140 may pass through the buffer valve bank 130 and then be connected to the main control valve 120, and part of the oil path may not pass through the buffer valve bank 130 and is directly connected to the main control valve 120.

Fig. 3 is a schematic diagram of the oil circuit connection of the valve spool of the eight-way directional valve 140 in the second position. As shown in fig. 3, when the eight-way selector valve 140 is in the second position, the four oil paths controlled by the left operating handle 100 are connected as follows:

the oil path 101 controlled by the left operating handle through pushing back is connected with the C input port 143 of the eight-way reversing valve 140, the C input port 143 of the eight-way reversing valve 140 is communicated with the D1 output port 148, and the D1 output port 148 is connected with the upper vehicle body left rotary oil path 124 controlled by the main control valve 120 after passing through the buffer valve group 130, so that the left operating handle 100 is pushed back to control the left rotary motion of the upper vehicle body of the excavator;

the oil path 102 controlled by the forward pushing of the left operating handle is connected with an input port 141A of an eight-way reversing valve 140, the input port 141A of the eight-way reversing valve 140 is communicated with an output port 146B 1, and the output port 146B 1 is connected with an upper vehicle body right rotary oil path 123 controlled by a main control valve 120 after passing through a buffer valve group 130, so that the forward pushing operation of the left operating handle 100 is realized to control the right rotary motion of an upper vehicle body of the excavator;

the oil path 103 for left operating handle push control is connected with the B input port 142 of the eight-way reversing valve 140, the B input port 142 of the eight-way reversing valve 140 is communicated with the C1 output port 147, and the C1 output port 147 is connected with the forearm inside retracting oil path 122 controlled by the main control valve 120 through the buffer valve group 130, so that the left operating handle 100 push control excavator forearm inside retracting action is realized;

the left operation handle left push control oil path 104 is connected with a D input port 144 of the eight-way reversing valve 140, the D input port 144 of the eight-way reversing valve 140 is communicated with an A1 output port 145, and the A1 output port 145 is connected with the forearm outward swinging oil path 121 controlled by the main control valve 120 through a buffer valve group 130, so that the left operation handle 100 is pushed left to control the outward swinging motion of the forearm of the excavator.

The operators with different operation habits can realize the two operation logic switching of the fig. 2 and the fig. 3 by switching the valve position of the valve core of the eight-way reversing valve 140, thereby meeting the operation habits of different operators.

Optionally, the oil path 111 for the right operating handle push-back control is connected to the boom raising oil path 125 controlled by the main control valve 120, the oil path 112 for the right operating handle push-forward control is connected to the boom lowering oil path 126 controlled by the main control valve 120, the oil path 113 for the right operating handle push-right control is connected to the bucket outward swinging oil path 127 controlled by the main control valve 120, and the oil path 114 for the right operating handle push-left control is connected to the bucket inward retracting oil path 128 controlled by the main control valve 120.

Optionally, an oil path portion controlled by the right operating handle 110 may pass through the buffer valve group 130, as shown in fig. 2 and 3, the oil path 111 controlled by the right operating handle by pushing backward passes through the buffer valve group 130 and is connected to the boom raising oil path 125 controlled by the main control valve 120, and the oil path 112 controlled by the right operating handle by pushing forward passes through the buffer valve group 130 and is connected to the boom lowering oil path 126 controlled by the main control valve 120, so that the right operating handle 110 can more stably control raising and lowering of the boom of the excavator.

Alternatively, the oil paths controlled by the right operating handle 110 may all be provided through the cushion valve block 130.

Optionally, the oil line system controlled by the left operating handle 100 and the oil line system controlled by the right operating handle 110 share the cushion valve group 130, or may be replaced by independent cushion valves.

Optionally, the eight-way reversing valve 140 has a pure mechanical structure, and is simple in structure, and an electric wire does not need to be connected to a controller or other pilot control pipelines.

Optionally, the eight-way reversing valve 140 is a manual two-position eight-way reversing valve, the valve position of the eight-way reversing valve can be manually switched, and a manipulator of a different excavator can switch the operation logic of the excavator accessory only by simply manually pulling the eight-way reversing valve 140, so that the operation habit of the manipulator is met.

Optionally, the eight-way reversing valve 140 is a hydraulic control reversing valve or an electromagnetic reversing valve, and a button can be manually pressed or an instruction can be sent to perform reversing operation.

Optionally, the oil path controlled by the left operating handle 100 can be connected to the eight-way reversing valve 140 through a hydraulic rubber hose, so that the eight-way reversing valve is easy to assemble, can be temporarily additionally installed, is applied to switching of operating logics of different new and old vehicles, and is convenient for customers.

The utility model also provides an excavator is provided with the utility model discloses an excavator accessory operation logic switched systems.

The utility model discloses an excavator accessory includes common scraper bowl, quartering hammer, pile driver, hydraulic pressure and cuts, crushing pincers, olecranon and cuts, tears the car and cuts, grabs wood or stone implement, lotus flower and grabs, broken fill, moves trees machine, reaches accessories such as vibratory tamper, the excavator accessory all can realize through this method that the operation logic switches, all is the protection scheme of this patent.

The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.

In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.

Claims

1. An excavator accessory operation logic switching system, comprising a left operating handle (100), a right operating handle (110) and a main control valve (120), characterized in that the excavator accessory operation logic switching system further comprises: the eight-way reversing valve (140) is connected between the left operating handle (100) and the main control valve (120), the eight-way reversing valve (140) is used for switching the flow direction of an oil path, four input oil ports of the eight-way reversing valve (140) are connected with the left operating handle (100), and four output oil ports of the eight-way reversing valve (140) are connected with the main control valve (120).

2. The excavator accessory operating logic switching system of claim 1,

the eight-way reversing valve (140) has a first valve position and a second valve position;

when a valve core of the eight-way reversing valve (140) is located at a first valve position, an oil path (101) controlled by pushing the left operating handle backwards is connected with a small arm inward-contraction oil path (122) controlled by a main control valve (120), an oil path (102) controlled by pushing the left operating handle forwards is connected with a small arm outward-swinging oil path (121) controlled by the main control valve (120), an oil path (103) controlled by pushing the left operating handle rightwards is connected with an upper vehicle body right-turning oil path (123) controlled by the main control valve (120), and an oil path (104) controlled by pushing the left operating handle leftwards is connected with an upper vehicle body left-turning oil path (124) controlled by the main control valve (120);

when a valve core of the eight-way reversing valve (140) is located at a second valve position, an oil path (101) controlled by the left operating handle through pushing backwards is connected with an upper vehicle body left rotary oil path (124) controlled by the main control valve (120), an oil path (102) controlled by the left operating handle through pushing forwards is connected with an upper vehicle body right rotary oil path (123) controlled by the main control valve (120), an oil path (103) controlled by the left operating handle through pushing rightwards is connected with a small arm inward contraction oil path (122) controlled by the main control valve (120), and an oil path (104) controlled by the left operating handle through pushing leftwards is connected with a small arm outward swinging oil path (121) controlled by the main control valve (120).

3. The excavator accessory operating logic switching system of claim 2,

the four input oil ports of the eight-way reversing valve (140) are an input port A (141), an input port B (142), an input port C (143) and an input port D (144);

the input port A (141), the input port B (142), the input port C (143) and the input port D (144) are respectively connected with an oil path (102) for forward control of a left operating handle, an oil path (103) for right control of the left operating handle, an oil path (101) for backward control of the left operating handle and an oil path (104) for left control of the left operating handle;

the four output oil ports of the eight-way reversing valve (140) are an A1 output port (145), a B1 output port (146), a C1 output port (147) and a D1 output port (148);

the A1 output port (145), the B1 output port (146), the C1 output port (147) and the D1 output port (148) are respectively connected with a small arm outward swinging oil way (121), an upper vehicle body right rotating oil way (123), a small arm inward closing oil way (122) and an upper vehicle body left rotating oil way (124);

when a valve core of the eight-way reversing valve (140) is located at a first valve position, an A input port (141), a B input port (142), a C input port (143) and a D input port (144) of the eight-way reversing valve (140) are respectively communicated with an A1 output port (145), a B1 output port (146), a C1 output port (147) and a D1 output port (148);

when the valve core of the eight-way reversing valve (140) is located at the second valve position, the A input port (141), the B input port (142), the C input port (143) and the D input port (144) of the eight-way reversing valve (140) are respectively communicated with the B1 output port (146), the C1 output port (147), the D1 output port (148) and the A1 output port (145).

4. The excavator accessory operating logic switching system of claim 3, wherein a buffer valve group (130) is connected between the right operating handle (110) and the master control valve (120).

5. The excavator accessory operating logic switching system of claim 3, wherein a buffer valve group (130) is connected between the eight-way reversing valve (140) and the main control valve (120).

6. The excavator accessory operating logic switching system of claim 5, wherein the right operating handle (110) is connected to a main control valve (120) through the set of trim valves (130).

7. The excavator accessory operating logic switching system of claim 3, wherein the right operating handle (110) and the eight-way reversing valve (140) are each connected to the main control valve (120) by an independent cushion valve.

8. The excavator accessory operating logic switching system of any one of claims 1 to 7, wherein the eight-way reversing valve (140) is a manual two-position eight-way reversing valve.

9. The excavator accessory operating logic switching system of any one of claims 1 to 7, wherein the eight-way reversing valve (140) is a two-position eight-way hydraulically controlled reversing valve or a two-position eight-way magnetically controlled reversing valve.

10. An excavator characterized in that the excavator accessory operation logic switching system according to any one of claims 1 to 9 is provided.