Gear shifting control valve group of gearbox

Abstract

The utility model provides a gearbox gear shifting control valve group which comprises a gearbox gear shifting control valve block (1), an oil inlet filter (2), a proportional pressure reducing valve (3), a first two-position four-way electromagnetic valve (41), a second two-position four-way electromagnetic valve (42), a first working oil port filter (51), a second working oil port filter (52), a third working oil port filter (53) and a fourth working oil port filter (54). A P port, a T port, an A port, a B port, an R port and an F port are formed in the gearbox gear shifting control valve block (1), the A port and the B port are communicated with an oil port A1 and an oil port B1 of a gearbox control gear respectively, the R port and the F port are communicated with an oil port of a gearbox control retreat R1 and an oil port of a gearbox control advancing F1 respectively, the P port is an oil inlet, and the T port is an oil return port. The gear shifting control valve group of the gearbox is stable and reliable, and has the advantages of being simple in structure, few in used elements, few in electric control logic, low in cost and few in fault points.

Description

Technical Field

[0001] The utility model relates to a valve group technology, in particular to a gearbox shift control valve group. Background Art

[0002] The gearbox is a key component of construction machinery. It is used to change the transmission ratio and the torque of the engine crankshaft to meet the different requirements for the traction of the drive wheels and the vehicle speed under different driving conditions such as starting, accelerating, driving, and overcoming various road obstacles. The working conditions and working environment of construction machinery are very load-intensive, changeable, and maneuverable. The engine load changes greatly during operation, and the machine speed changes frequently. In order to ensure that the construction machinery can achieve efficient and energy-saving operations and fast maneuvers, it is necessary to constantly adjust the gear position of the machine. Conventional gearbox control valve group electronic control is complex and has many control components, such as Figure 1 As shown. There are problems of high cost and many failure points. The principle is as follows: Therefore, a stable and reliable gearbox shift valve group is the top priority. Utility Model Content

[0003] The purpose of the utility model is to propose a transmission shift control valve group to address the problems of complex electronic control and many control elements of the current transmission control valve group. The valve group has the advantages of simple structure, few components, less electronic control logic, low cost and few failure points.

[0004] It should be noted that, in the present utility model, unless otherwise specified, the specific meaning of "including" in relation to composition limitation and description includes both open-ended "including", "comprising" and similar meanings, and closed-ended "composed of", "composed of" and similar meanings.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a gearbox shift control valve group, including a gearbox shift control valve block 1, an oil inlet filter 2, a proportional pressure reducing valve 3, a first two-position four-way solenoid valve 41, a second two-position four-way solenoid valve 42, a first working oil port filter 51, a second working oil port filter 52, a third working oil port filter 53, and a fourth working oil port filter 54;

[0006] The gearbox shift control valve block 1 is provided with a P port, a T port, an A port, a B port, an R port and an F port, the A port and the B port are connected to the gearbox (specifically, the A port and the B port are respectively connected to the oil ports A1 and B1 of the gearbox for controlling the gear position), the R port and the F port are connected to the gearbox (specifically, the R port and the F port are respectively connected to the oil ports R1 and F1 of the gearbox for controlling the reverse and forward movements), the P port is an oil inlet, the T port is an oil return port, the A port, the B port, the R port and the F port are working oil ports for realizing forward and reverse movement and shifting gear positions, the F port and the R port control the forward and reverse rotation of the gearbox gears to realize the forward and reverse directions, and the A port and the B port control the gear position of the gearbox;

[0007] In the forward gear, when the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is energized, the oil port P, the oil inlet filter 2, the 2nd port of the proportional pressure reducing valve 3, the 1st port of the proportional pressure reducing valve 3, the 3rd port of the second two-position four-way solenoid valve 42, the 4th port of the second two-position four-way solenoid valve 42, the fourth working oil port filter 54, the gearbox F1 oil port, the gearbox forward shift cylinder, the third working oil port filter 53, the 2nd port of the second two-position four-way solenoid valve 42, the 1st port of the second two-position four-way solenoid valve 42 and the oil tank are connected in sequence, so that the gearbox is shifted to the forward gear position, and the vehicle moves forward after the gear is engaged;

[0008] In the reverse gear, when the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is not energized, the oil port P, the oil inlet filter 2, the 2nd port of the proportional pressure reducing valve 3, the 1st port of the proportional pressure reducing valve 3, the 3rd port of the second two-position four-way solenoid valve 42, the 2nd port of the second two-position four-way solenoid valve 42, the third working oil port filter 53, the gearbox R1 oil port, the gearbox reverse shift cylinder, the fourth working oil port filter 54, the 4th port of the second two-position four-way solenoid valve 42, the 1st port of the second two-position four-way solenoid valve 42 and the oil tank are connected in sequence, so that the gearbox is shifted to the reverse gear position, and the vehicle moves backward after the gear is engaged;

[0009] In the first gear, the first two-position four-way solenoid valve 41 is not energized, and the oil port P, the oil inlet filter 2, the 3rd port of the first two-position four-way solenoid valve 41, the 2nd port of the first two-position four-way solenoid valve 41, the first working oil port filter 51, the gearbox, the second working oil port filter 52, the 4th port of the first two-position four-way solenoid valve 41, the 1st port of the first two-position four-way solenoid valve 41 and the oil tank are connected in sequence to achieve the first gear;

[0010] In the second gear, the first two-position four-way solenoid valve 41 is energized, and the oil port P, the oil inlet filter 2, the 3rd port of the first two-position four-way solenoid valve 41, the 4th port of the first two-position four-way solenoid valve 41, the second working oil port filter 52, the gearbox, the first working oil port filter 51, the 2nd port of the first two-position four-way solenoid valve 41, the 1st port of the first two-position four-way solenoid valve 41 and the oil tank are connected in sequence to achieve the second gear.

[0011] Furthermore, the proportional pressure reducing valve 3 includes three ports, namely port 1 of the proportional pressure reducing valve 3, port 2 of the proportional pressure reducing valve 3 and port 3 of the proportional pressure reducing valve 3. Port 2 of the proportional pressure reducing valve 3 is a pressure oil port; port 1 of the proportional pressure reducing valve 3 is a working oil port, and its main function is to control the action of the oil cylinder; port 3 of the proportional pressure reducing valve 3 is an oil drain port for unloading the high-pressure oil.

[0012] Further, the first two-position four-way solenoid valve 41 includes four ports, namely port 1 of the first two-position four-way solenoid valve 41, port 2 of the first two-position four-way solenoid valve 41, port 3 of the first two-position four-way solenoid valve 41 and port 4 of the first two-position four-way solenoid valve 41. Port 1 of the first two-position four-way solenoid valve 41 and port 3 of the first two-position four-way solenoid valve 41 are located on a side of the valve body of the first two-position four-way solenoid valve 41 close to the proportional pressure reducing valve 3, and port 2 of the first two-position four-way solenoid valve 41 and port 4 of the first two-position four-way solenoid valve 41 are located on a side of the valve body of the first two-position four-way solenoid valve 41 away from the proportional pressure reducing valve 3.

[0013] Further, the second two-position four-way solenoid valve 42 includes four ports, namely port 1 of the second two-position four-way solenoid valve 42, port 2 of the second two-position four-way solenoid valve 42, port 3 of the second two-position four-way solenoid valve 42, and port 4 of the second two-position four-way solenoid valve 42. Port 1 of the second two-position four-way solenoid valve 42 and port 3 of the second two-position four-way solenoid valve 42 are located on a side of the second two-position four-way solenoid valve 42 valve body close to the proportional pressure reducing valve 3, and port 2 of the second two-position four-way solenoid valve 42 and port 4 of the second two-position four-way solenoid valve 42 are located on a side of the second two-position four-way solenoid valve 42 valve body away from the proportional pressure reducing valve 3.

[0014] Furthermore, the proportional pressure reducing valve 3 , the first two-position four-way solenoid valve 41 and the second two-position four-way solenoid valve 42 are located on the same side of the transmission shift control valve block 1 .

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1) The utility model has a simple structure for the gearbox shift control valve group and uses fewer components;

[0017] 2) The utility model has less electronic control logic for the gearbox shift control valve group;

[0018] 3) The utility model has few failure points in the gearbox shift control valve group;

[0019] 4) The utility model has a low cost for the gearbox shift control valve group. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a conventional transmission control valve group;

[0021] Figure 2 This is the principle diagram of the gearbox shift control valve group of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the gearbox shift control valve group of the utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0025] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0026] Example 1

[0027] This embodiment discloses a gearbox shift control valve group, such as Figure 2 and Figure 3 As shown, it includes a gearbox shift control valve block 1, an oil inlet filter 2, a proportional pressure reducing valve 3, a first two-position four-way solenoid valve 41, a second two-position four-way solenoid valve 42, a first working oil port filter 51, a second working oil port filter 52, a third working oil port filter 53, and a fourth working oil port filter 54;

[0028] The gearbox shift control valve block 1 is provided with a P port, a T port, an A port, a B port, an R port and an F port. The A port and the B port are respectively communicated with the oil ports A1 and B1 of the gearbox control gear, and the R port and the F port are respectively communicated with the oil ports R1 and F1 of the gearbox control reverse and forward. The P port is the oil inlet port, the T port is the oil return port, the A port, the B port, the R port and the F port are the working oil ports for realizing forward, reverse and shifting gears, the F port and the R port control the forward and reverse rotation of the gearbox gear to realize the forward and reverse directions, and the A port and the B port control the gearbox gear; the proportional pressure reducing valve 3, the first two-position four-way solenoid valve 41 and the second two-position four-way solenoid valve 42 are located on the same side of the gearbox shift control valve block 1.

[0029] The proportional pressure reducing valve 3 includes three ports, namely port 1 of the proportional pressure reducing valve 3, port 2 of the proportional pressure reducing valve 3 and port 3 of the proportional pressure reducing valve 3. Port 2 of the proportional valve is the oil inlet; port 1 is the working port; and port 3 is the oil drain port.

[0030] The first two-position four-way solenoid valve 41 includes four ports, namely port 1 of the first two-position four-way solenoid valve 41, port 2 of the first two-position four-way solenoid valve 41, port 3 of the first two-position four-way solenoid valve 41 and port 4 of the first two-position four-way solenoid valve 41. Port 1 of the first two-position four-way solenoid valve 41 and port 3 of the first two-position four-way solenoid valve 41 are located on a side of the valve body of the first two-position four-way solenoid valve 41 close to the proportional pressure reducing valve 3, and port 2 of the first two-position four-way solenoid valve 41 and port 4 of the first two-position four-way solenoid valve 41 are located on a side of the valve body of the first two-position four-way solenoid valve 41 away from the proportional pressure reducing valve 3.

[0031] The second two-position four-way solenoid valve 42 includes four ports, namely port 1 of the second two-position four-way solenoid valve 42, port 2 of the second two-position four-way solenoid valve 42, port 3 of the second two-position four-way solenoid valve 42, and port 4 of the second two-position four-way solenoid valve 42. Port 1 of the second two-position four-way solenoid valve 42 and port 3 of the second two-position four-way solenoid valve 42 are located on a side of the second two-position four-way solenoid valve 42 valve body close to the proportional pressure reducing valve 3, and port 2 of the second two-position four-way solenoid valve 42 and port 4 of the second two-position four-way solenoid valve 42 are located on a side of the second two-position four-way solenoid valve 42 valve body away from the proportional pressure reducing valve 3.

[0032] In neutral gear, the proportional pressure reducing valve 3, the first two-position four-way solenoid valve 41 and the second two-position four-way solenoid valve 42 are all de-energized, and the oil port P, the oil inlet filter 2 and the oil inlet 2 of the proportional pressure reducing valve 3 are sealed. The gearbox, the filter 53, the port 1 of the proportional pressure reducing valve 3, the port 3 of the proportional pressure reducing valve 3 and the port T are connected to the oil return tank. There is no pressure at the working ports A, B, R and F, and the vehicle is in neutral gear at this time.

[0033] In the forward gear, when the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is energized, the oil port P, the oil inlet filter 2, the proportional pressure reducing valve 3, the 3rd port of the second two-position four-way solenoid valve 42, the 4th port of the second two-position four-way solenoid valve 42, the fourth working oil port filter 54, the gearbox F1 oil port, the gearbox forward shift cylinder, the third working oil port filter 53, the 2nd port of the second two-position four-way solenoid valve 42, the 1st port of the second two-position four-way solenoid valve 42 and the oil tank are connected in sequence, so that the gearbox is shifted to the forward gear position, and the vehicle moves forward after the gear is engaged;

[0034] In the reverse gear, when the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is not energized, the oil port P, the oil inlet filter 2, the proportional pressure reducing valve 3, the 3rd port of the second two-position four-way solenoid valve 42, the 2nd port of the second two-position four-way solenoid valve 42, the third working oil port filter 53, the gearbox R1 oil port, the gearbox reverse shift cylinder, the fourth working oil port filter 54, the 4th port of the second two-position four-way solenoid valve 42, the 1st port of the second two-position four-way solenoid valve 42 and the oil tank are connected in sequence, so that the gearbox is shifted to the reverse gear position, and the vehicle moves backward after the gear is engaged;

[0035] In the first gear, the first two-position four-way solenoid valve 41 is not energized, and the oil port P, the oil inlet filter 2, the 3rd port of the first two-position four-way solenoid valve 41, the 2nd port of the first two-position four-way solenoid valve 41, the first working oil port filter 51, the gearbox, the second working oil port filter 52, the 4th port of the first two-position four-way solenoid valve 41, the 1st port of the first two-position four-way solenoid valve 41 and the oil tank are connected in sequence to achieve the first gear;

[0036] In the second gear, the first two-position four-way solenoid valve 41 is energized, and the oil port P, the oil inlet filter 2, the 3rd port of the first two-position four-way solenoid valve 41, the 4th port of the first two-position four-way solenoid valve 41, the second working oil port filter 52, the gearbox, the first working oil port filter 51, the 2nd port of the first two-position four-way solenoid valve 41, the 1st port of the first two-position four-way solenoid valve 41 and the oil tank are connected in sequence to achieve the second gear.

[0037] The working principle of this gearbox shift control is as follows:

[0038] 1. Neutral

[0039] The proportional pressure reducing valve 3, the first two-position four-way solenoid valve 41 and the second two-position four-way solenoid valve 42 are all non-energized, and the oil circuit is as follows:

[0040] Oil port P—Port 2 of oil inlet filter 2—Port 1 of oil inlet filter 2—Port 2 of proportional pressure reducing valve 3—Oil is sealed. Transmission—Port 2 of filter 53—Port 1 of filter 53—Port 1 of proportional pressure reducing valve 3—Port 3 of proportional pressure reducing valve 3—T returns to the oil tank. There is no pressure in all working ports A / B / R / F, and the vehicle is in neutral.

[0041] 2. Forward gear

[0042] When the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is energized, it is the forward gear. The oil circuit is as follows:

[0043] Oil port P—port 2 of the oil inlet filter 2—port 1 of the oil inlet filter 2—port 2 of the proportional pressure reducing valve 3—port 1 of the proportional pressure reducing valve 3—port 3 of the second two-position four-way solenoid valve 42—port 4 of the second two-position four-way solenoid valve 42—port 1 of the fourth working oil port filter 54—port 2 of the fourth working oil port filter 54—transmission F1 oil port—transmission forward shift cylinder plug—port 2 of the third working oil port filter 53—port 1 of the third working oil port filter 53—port 2 of the second two-position four-way solenoid valve 42—port 1 of the second two-position four-way solenoid valve 42—oil tank, so that the transmission shifts to the forward gear and the vehicle moves forward after engaging the gear.

[0044] 3. Reverse gear

[0045] When the proportional pressure reducing valve 3 is energized and the second two-position four-way solenoid valve 42 is not energized, it is reverse gear. The oil circuit is as follows:

[0046] Oil port P—port 2 of the oil inlet filter 2—port 1 of the oil inlet filter 2—port 2 of the proportional pressure reducing valve 3—port 1 of the proportional pressure reducing valve 3—port 3 of the second two-position four-way solenoid valve 42—port 2 of the second two-position four-way solenoid valve 42—port 1 of the third working oil port filter 53—port 2 of the third working oil port filter 53—transmission R1 oil port—transmission reverse shift cylinder—port 2 of the fourth working oil port filter 54—port 1 of the fourth working oil port filter 54—port 4 of the second two-position four-way solenoid valve 42—port 1 of the second two-position four-way solenoid valve 42—oil tank, so that the transmission is shifted to the reverse gear position and the vehicle moves backward after engaging the gear.

[0047] 4. First gear

[0048] The first two-position four-way solenoid valve 41 must not be energized. The oil circuit is as follows:

[0049] Oil port P—port 2 of the oil inlet filter 2—port 1 of the oil inlet filter 2—port 3 of the first two-position four-way solenoid valve 41—port 2 of the first two-position four-way solenoid valve 41—port 1 of the first working oil port filter 51—port 2 of the first working oil port filter 51—enter the gearbox—port 2 of the second working oil port filter 52—port 1 of the second working oil port filter 52—port 4 of the first two-position four-way solenoid valve 41—port 1 of the first two-position four-way solenoid valve 41—oil tank, achieving 1st gear.

[0050] 5. Second gear

[0051] The first two-position four-way solenoid valve 41 is energized. The oil circuit is as follows:

[0052] Oil port P—port 2 of the oil inlet filter 2—port 1 of the oil inlet filter 2—port 3 of the first two-position four-way solenoid valve 41—port 4 of the first two-position four-way solenoid valve 41—port 1 of the second working oil port filter 52—port 2 of the second working oil port filter 52—enter the gearbox—port 2 of the first working oil port filter 51—port 1 of the first working oil port filter 51—port 2 of the first two-position four-way solenoid valve 41—port 1 of the first two-position four-way solenoid valve 41—oil tank, achieving 1st gear.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A gearbox shift control valve group, characterized in that: It comprises a gearbox shift control valve block (1), an oil inlet filter (2), a proportional pressure reducing valve (3), a first two-position four-way solenoid valve (41), a second two-position four-way solenoid valve (42), a first working oil port filter (51), a second working oil port filter (52), a third working oil port filter (53), and a fourth working oil port filter (54); In the forward gear, when the proportional pressure reducing valve (3) is energized and the second two-position four-way solenoid valve (42) is energized, the oil port P, the oil inlet filter (2), the 2nd port of the proportional pressure reducing valve (3), the 1st port of the proportional pressure reducing valve (3), the 3rd port of the second two-position four-way solenoid valve (42), the 4th port of the second two-position four-way solenoid valve (42), the fourth working oil port filter (54), the gearbox F1 oil port, the gearbox forward shift cylinder, the third working oil port filter (53), the 2nd port of the second two-position four-way solenoid valve (42), the 1st port of the second two-position four-way solenoid valve (42) and the oil tank are connected in sequence; In the reverse gear, when the proportional pressure reducing valve (3) is energized and the second two-position four-way solenoid valve (42) is not energized, the oil port P, the oil inlet filter (2), the 2nd port of the proportional pressure reducing valve (3), the 1st port of the proportional pressure reducing valve (3), the 3rd port of the second two-position four-way solenoid valve (42), the 2nd port of the second two-position four-way solenoid valve (42), the third working oil port filter (53), the gearbox R1 oil port, the gearbox reverse shift cylinder, the fourth working oil port filter (54), the 4th port of the second two-position four-way solenoid valve (42), the 1st port of the second two-position four-way solenoid valve (42) and the oil tank are connected in sequence; In the first gear, the first two-position four-way solenoid valve (41) is not energized, and the oil port P, the oil inlet filter (2), the 3rd port of the first two-position four-way solenoid valve (41), the 2nd port of the first two-position four-way solenoid valve (41), the first working oil port filter (51), the gearbox, the second working oil port filter (52), the 4th port of the first two-position four-way solenoid valve (41), the 1st port of the first two-position four-way solenoid valve (41) and the oil tank are connected in sequence; In the second gear, the first two-position four-way solenoid valve (41) is energized, and the oil port P, the oil inlet filter (2), the 3rd port of the first two-position four-way solenoid valve (41), the 4th port of the first two-position four-way solenoid valve (41), the second working oil port filter (52), the gearbox, the first working oil port filter (51), the 2nd port of the first two-position four-way solenoid valve (41), the 1st port of the first two-position four-way solenoid valve (41) and the oil tank are connected in sequence.

2. The transmission shift control valve group according to claim 1, characterized in that: The first two-position four-way solenoid valve (41) comprises four ports, namely port 1 of the first two-position four-way solenoid valve (41), port 2 of the first two-position four-way solenoid valve (41), port 3 of the first two-position four-way solenoid valve (41) and port 4 of the first two-position four-way solenoid valve (41); port 1 of the first two-position four-way solenoid valve (41) and port 3 of the first two-position four-way solenoid valve (41) are located on a side of the valve body of the first two-position four-way solenoid valve (41) close to the proportional pressure reducing valve (3); port 2 of the first two-position four-way solenoid valve (41) and port 4 of the first two-position four-way solenoid valve (41) are located on a side of the valve body of the first two-position four-way solenoid valve (41) far from the proportional pressure reducing valve (3).

3. The transmission shift control valve group according to claim 1, characterized in that: The second two-position four-way solenoid valve (42) comprises four ports, namely port 1 of the second two-position four-way solenoid valve (42), port 2 of the second two-position four-way solenoid valve (42), port 3 of the second two-position four-way solenoid valve (42), and port 4 of the second two-position four-way solenoid valve (42); port 1 of the second two-position four-way solenoid valve (42) and port 3 of the second two-position four-way solenoid valve (42) are located on a side of the valve body of the second two-position four-way solenoid valve (42) close to the proportional pressure reducing valve (3); port 2 of the second two-position four-way solenoid valve (42) and port 4 of the second two-position four-way solenoid valve (42) are located on a side of the valve body of the second two-position four-way solenoid valve (42) away from the proportional pressure reducing valve (3).

4. The transmission shift control valve group according to claim 1, characterized in that: The proportional pressure reducing valve (3), the first two-position four-way solenoid valve (41) and the second two-position four-way solenoid valve (42) are located on the same side of the gearbox shift control valve block (1).

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