A multi-way valve integrating electric control lifting and mechanical hydraulic output

Abstract

A multi-way valve assembly integrating electric control lifting and mechanical hydraulic output includes a multi-way valve front cover, a four-position hydraulic output valve assembly, a three-position hydraulic output valve assembly and an electric control lifting valve assembly connected in sequence, wherein the electric control lifting valve assembly includes a valve body and a first two-position two-way solenoid valve, a three-position four-way solenoid reversing valve, a first pressure measuring plug, a hydraulic control one-way valve, a second two-position two-way solenoid valve and a second pressure measuring plug installed on the valve body. The present invention replaces the mechanical lifting valve and rear cover of the original multi-way valve with a new type of electric control lifting valve assembly, and the electric control operation reduces the labor intensity of the driver. Combined with the original mechanical hydraulic output retained, it is convenient to control the lifting, neutral, lowering and floating functions of the tractor lifting system, and the structure can be seamlessly connected with existing connectors, pipelines and other accessories.

Description

Technical Field

[0001] The invention belongs to the field of tractors and relates to a multi-way valve with integrated electric control lifting and mechanical hydraulic output for tractors. Background Art

[0002] At present, most of the lifting systems of large and medium-power tractors in China are operated by mechanical handles. As a system that is frequently used in the farming process, the lifting system has a large operating force and stroke, and the driving intensity is high. Although foreign electric lifting systems are easy to operate, they are expensive and difficult for users to accept. Therefore, a new type of multi-way valve that integrates electric lifting and mechanical hydraulic output is used. On the one hand, the lifting system is changed to electric lifting to reduce the labor intensity of the driver; on the other hand, the original mechanical hydraulic output is retained and integrated with it. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-way valve with integrated electric-controlled lifting and mechanical hydraulic output, which is easy to operate, highly versatile, cost-effective and simple in structure. On the basis of the existing multi-way valve, the interface position is not changed, and an electric-controlled lifting valve assembly is designed to facilitate the control of the lifting, neutral, lowering and floating functions of the tractor lifting system, while being able to seamlessly connect with the original connection points, pipelines, etc.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a multi-way valve integrating electric control lifting and mechanical hydraulic output, comprising a multi-way valve front cover, a four-position hydraulic output valve assembly, a three-position hydraulic output valve assembly and an electric control lifting valve assembly connected in sequence, wherein the electric control lifting valve assembly comprises a valve body and a first two-position two-way solenoid valve, a three-position four-way solenoid reversing valve, a first pressure measuring plug, a hydraulically controlled one-way valve, a second two-position two-way solenoid valve and a second pressure measuring plug installed on the valve body; the a port of the first two-position two-way solenoid valve communicates with the oil outlet P1 of the three-position hydraulic output valve assembly, and the b port communicates with the oil return port T1 of the three-position hydraulic output valve assembly; The d port of the three-position four-way solenoid reversing valve communicates with the oil outlet P1 of the three-position hydraulic output valve assembly, the e port communicates with the h port of the hydraulically controlled one-way valve, the f port communicates with the external interface B3 of the valve body, and the c port communicates with the return oil port T1 of the three-position hydraulic output valve assembly; the first pressure measuring plug is installed on the oil passage communicating with the external interface B3 of the valve body; the g port of the hydraulically controlled one-way valve communicates with the external interface B3 of the valve body, and the k port communicates with the external interface A3 of the valve body; the n port of the second two-position two-way solenoid valve communicates with the return oil port T1 of the three-position hydraulic output valve assembly, and the m port communicates with the external interface A3 of the valve body; the second pressure measuring plug is installed on the oil passage communicating with the external interface A3 of the valve body.

[0005] The multi-way valve front cover, the four-position hydraulic output valve assembly, the three-position hydraulic output valve assembly and the electric control lifting valve assembly are sequentially stacked and connected together by bolts.

[0006] The first two-position two-way solenoid valve, the three-position four-way solenoid reversing valve, the first pressure measuring plug, the hydraulically controlled one-way valve, the second two-position two-way solenoid valve and the second pressure measuring plug are all screwed onto the valve body in the form of threaded connection.

[0007] The present invention has the following innovations and advantages: the present invention replaces the original mechanical lifting valve and rear cover of the multi-way valve with a new type of electrically controlled lifting valve assembly. The electronic control reduces the labor intensity of the driver. Combined with the retained original mechanical hydraulic output, it facilitates the control of the lifting, neutral, lowering and floating functions of the tractor lifting system. At the same time, the structure can be seamlessly connected with existing connecting ports, pipelines and other accessories. Compared with foreign electrically controlled lifting systems, the cost is much lower than that of foreign systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a multi-way valve assembly of the present invention;

[0009] Figure 2 It is a schematic diagram of an electrically controlled poppet valve assembly in a multi-way valve of the present invention;

[0010] Figure 3 It is a schematic diagram of the multi-way valve assembly of the present invention;

[0011] Figure 4 It is a schematic diagram of the neutral state of the electric-controlled poppet valve assembly in the multi-way valve of the present invention;

[0012] Figure 5 It is a principle diagram of the lifting state of the electric-controlled lifting valve assembly in the multi-way valve of the present invention;

[0013] Figure 6 It is a schematic diagram of the descending state of the electric-controlled lifting valve assembly in the multi-way valve of the present invention;

[0014] Figure 7 It is a schematic diagram of the floating state of the electric-controlled poppet valve assembly in the multi-way valve of the present invention;

[0015] Markings in the figure: 1, front cover of multi-way valve, 2, four-position hydraulic output valve assembly, 3, three-position hydraulic output valve assembly, 4, electric control lifting valve assembly; 4.1 valve body, 4.2, first two-position two-way solenoid valve, 4.3, three-position four-way solenoid reversing valve, 4.4, first pressure measuring plug, 4.5, hydraulic control one-way valve, 4.6, second two-position two-way solenoid valve, 4.7, second pressure measuring plug. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the invention in any way.

[0017] See attached Figure 1 , 2As shown, a multi-way valve assembly integrating electric control lifting and mechanical hydraulic output mainly comprises: a multi-way valve front cover 1, a four-position hydraulic output valve assembly 2, a three-position hydraulic output valve assembly 3 and an electric control lifting valve assembly 4. The electric control lifting valve assembly comprises: a valve body 4.1, a first two-position two-way solenoid valve 4.2, a three-position four-way solenoid reversing valve 4.3, a first pressure measuring plug 4.4, a hydraulic control check valve 4.5, a second two-position two-way solenoid valve 4.6 and a second pressure measuring plug 4.7. The first two-position two-way solenoid valve 4.2, the three-position four-way solenoid reversing valve 4.3, the first pressure measuring plug 4.4, the hydraulic control check valve 4.5, the second two-position two-way solenoid valve 4.6 and the second pressure measuring plug 4.7 are screwed on the valve body 4.1 in the form of threaded connection to form the electric control lifting valve assembly 4, and the electric control lifting valve assembly 4 is then connected with the three-position hydraulic output valve assembly 3, the four-position hydraulic output valve assembly 2 and the multi-way valve front cover 1 in sequence by bolts.

[0018] The internal oil circuit of the electronically controlled poppet valve assembly is as follows Figure 3 As shown, the port a of the first two-position two-way solenoid valve 4.2 communicates with the oil outlet P1 of the three-position hydraulic output valve assembly 3, and the port b communicates with the oil return port T1 of the three-position hydraulic output valve assembly 3; the port d of the three-position four-way solenoid reversing valve 4.3 communicates with the oil outlet P1 of the three-position hydraulic output valve assembly 3, the port e communicates with the port h of the hydraulic control check valve 4.5, the port f communicates with the external interface B3 of the valve body 4.1, and the port c communicates with the oil return port T1 of the three-position hydraulic output valve assembly 3; the first pressure measuring plug 4.4 is installed at On the oil passage connected with the external interface B3 of the valve body 4.1; the g port of the hydraulically controlled one-way valve 4.5 communicates with the external interface B3 of the valve body 4.1, the h port communicates with the e port of the three-position four-way electromagnetic reversing valve 4.3, and the k port communicates with the external interface A3 of the valve body 4.1; the n port of the second two-position two-way electromagnetic valve 4.6 communicates with the return oil port T1 of the three-position hydraulic output valve assembly 3, and the m port communicates with the external interface A3 of the valve body 4.1; the second pressure measuring plug 4.7 is installed on the oil passage connected with the external interface A3 of the valve body 4.1.

[0019] In the neutral state, the system principle is as shown in the attached Figure 3~4 As shown, the multi-way valve is not operated, the solenoid valves are all de-energized, and the oil from the oil pump passes through the multi-way valve front cover 1, the four-position hydraulic output valve assembly 2 and the three-position hydraulic output valve assembly 3 in sequence into the a port of the first two-position two-way solenoid valve 4.2 in the electric control lifting valve assembly 4, and the return oil passes through the b port of the first two-position two-way solenoid valve 4.2 and the return oil port of the three-position hydraulic output valve assembly 3 and returns to the oil tank.

[0020] In the lifting state, the system principle is as shown in the attached Figure 5As shown, the three-position four-way solenoid reversing valve 4.3 is energized to move left to the lifting position, the first two-position two-way solenoid valve 4.2 is energized to move right, the oil from the oil pump opens the hydraulic control one-way valve 4.5 through the three-position four-way solenoid reversing valve 4.3 and enters the external oil port A3 of the valve body 4.1, the oil cylinder is lifted, and the return oil from the oil cylinder enters the return oil port T1 of the three-position hydraulic output valve assembly 3 through the three-position four-way solenoid reversing valve 4.3 and returns to the oil tank, and the second two-position two-way solenoid valve 4.6 is de-energized.

[0021] In the descending state, the system principle is as shown in the attached Figure 6 As shown, the three-position four-way solenoid reversing valve 4.3 is energized and moves rightward to the descending position, the first two-position two-way solenoid valve 4.2 is energized and moves rightward, the oil from the oil pump enters the external oil port B3 of the valve body 4.1 through the three-position four-way solenoid reversing valve 4.3, and opens the hydraulic control one-way valve 4.5, the oil cylinder descends, and the return oil from the oil cylinder enters the return oil port T1 of the three-position hydraulic output valve assembly 3 through the three-position four-way solenoid reversing valve 4.3 and returns to the oil tank, and the second two-position two-way solenoid valve 4.6 is de-energized.

[0022] In floating state, the system principle is as shown in the attached Figure 7 As shown, the three-position four-way solenoid reversing valve 4.3 is not energized, the first two-position two-way solenoid valve 4.2 is not energized, the oil from the oil pump passes through the first two-position two-way solenoid valve 4.2 and is connected to the return oil port T1 of the three-position hydraulic output valve assembly 3, the oil returns to the oil tank, the second two-position two-way solenoid valve 4.6 is energized and moves to the left, the upper and lower chambers of the oil cylinder are communicated through the second two-position two-way solenoid valve 4.6 and the three-position four-way solenoid reversing valve 4.3, and the agricultural machinery can realize the floating function.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Those skilled in the art should understand that the specific implementation modes of the present invention may be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A multi-way valve integrating electric control lifting and mechanical hydraulic output, comprising a multi-way valve front cover (1), a four-position hydraulic output valve assembly (2), a three-position hydraulic output valve assembly (3) and an electric control lifting valve assembly (4) connected in sequence, characterized in that: The electrically controlled lifting valve assembly (4) comprises a valve body (4.1) and a first two-position two-way solenoid valve (4.2), a three-position four-way solenoid reversing valve (4.3), a first pressure measuring plug (4.4), a hydraulically controlled one-way valve (4.5), a second two-position two-way solenoid valve (4.6) and a second pressure measuring plug (4.7) installed on the valve body (4.1); the port a of the first two-position two-way solenoid valve (4.2) communicates with the oil outlet port P1 of the three-position hydraulic output valve assembly (3), and the port b communicates with the oil return port T1 of the three-position hydraulic output valve assembly (3); the port d of the three-position four-way solenoid reversing valve (4.3) communicates with the oil outlet port P1 of the three-position hydraulic output valve assembly (3), and the port e communicates with the hydraulically controlled one-way valve (4.5). The h port of the valve (4.5) is in communication, the f port is in communication with the external port B3 of the valve body (4.1), and the c port is in communication with the oil return port T1 of the three-position hydraulic output valve assembly (3); the first pressure measuring plug (4.4) is installed on the oil passage communicating with the external port B3 of the valve body; the g port of the hydraulically controlled one-way valve (4.5) is in communication with the external port B3 of the valve body (4.1), and the k port is in communication with the external port A3 of the valve body (4.1); the n port of the second two-position two-way solenoid valve (4.6) is in communication with the oil return port T1 of the three-position hydraulic output valve assembly (3), and the m port is in communication with the external port A3 of the valve body (4.1); the second pressure measuring plug (4.7) is installed on the oil passage communicating with the external port A3 of the valve body (4.1).

2. The multi-way valve with integrated electronically controlled lifting and mechanical hydraulic output according to claim 1, characterized in that: The multi-way valve front cover (1), the four-position hydraulic output valve assembly (2), the three-position hydraulic output valve assembly (3) and the electric control lift valve assembly (4) are sequentially stacked and connected together by bolts.

3. The multi-way valve with integrated electronically controlled lifting and mechanical hydraulic output according to claim 1, characterized in that: The first two-position two-way solenoid valve (4.2), the three-position four-way solenoid reversing valve (4.3), the first pressure measuring plug (4.4), the hydraulically controlled one-way valve (4.5), the second two-position two-way solenoid valve (4.6) and the second pressure measuring plug (4.7) are all screwed onto the valve body (4.1) in the form of threaded connections.

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