阅读说明：本技术 一种离合器和油缸综合控制液压系统 (Clutch and oil cylinder integrated control hydraulic system ) 是由 秦龚玉 邱文刚 罗静 郑静 于 2021-07-02 设计创作，主要内容包括：本发明公开了一种离合器和油缸综合控制液压系统,属于液压控制技术领域。该系统包括第一平衡阀块、第二平衡阀块和第三平衡阀块,所述第一平衡阀块的一端通过第一控制阀和油泵与油箱连接,另一端并联连接有第五油缸组和第六油缸组,所述第二平衡阀块的一端通过第三控制阀和油泵与油箱连接,另一端并联连接有第一油缸组和第二油缸组,所述第三平衡阀块的一端通过第二控制阀和油泵与油箱连接,另一端并联连接有第三油缸和第四油缸。用于控制多个同步动作的油缸或离合器时,有助于减少阀门使用数量,大大简化油路构成。此外,采用三联油泵组作为动力源,也有助于简化油路。(The invention discloses a clutch and oil cylinder comprehensive control hydraulic system, and belongs to the technical field of hydraulic control. The system comprises a first balance valve block, a second balance valve block and a third balance valve block, wherein one end of the first balance valve block is connected with an oil tank through a first control valve and an oil pump, the other end of the first balance valve block is connected with a fifth oil cylinder group and a sixth oil cylinder group in parallel, one end of the second balance valve block is connected with the oil tank through a third control valve and the oil pump, the other end of the second balance valve block is connected with the first oil cylinder group and the second oil cylinder group in parallel, one end of the third balance valve block is connected with the oil tank through a second control valve and the oil pump, and the other end of the third balance valve block is connected with a third oil cylinder and a fourth oil cylinder in parallel. When the device is used for controlling a plurality of oil cylinders or clutches which act synchronously, the use number of valves is reduced, and the oil circuit composition is greatly simplified. In addition, the triple oil pump group is adopted as a power source, and the simplification of an oil way is facilitated.)

1. The utility model provides a clutch and hydro-cylinder integrated control hydraulic system which characterized in that: the oil tank balance valve comprises a first balance valve block (27), a second balance valve block (28) and a third balance valve block (29), one end of the first balance valve block (27) is connected with an oil tank (26) through a first control valve (14) and an oil pump, the other end of the first balance valve block is connected with a fifth oil cylinder group (11) and a sixth oil cylinder group (12) in parallel, one end of the second balance valve block (28) is connected with the oil tank (26) through a third control valve (16) and the oil pump, the other end of the second balance valve block is connected with a first oil cylinder group (7) and a second oil cylinder group (8) in parallel, one end of the third balance valve block (29) is connected with the oil tank (26) through a second control valve (15) and the oil pump, and the other end of the third balance valve block (9) and a fourth oil cylinder (10) are connected in parallel.

2. The clutch and cylinder integrated control hydraulic system according to claim 1, wherein: the fifth cylinder group (11) is used for controlling the synchronous engagement or disengagement of the fifth clutch group (5), the sixth cylinder group (12) is used for controlling the synchronous engagement or disengagement of the sixth clutch group (6), the first cylinder group (7) is used for controlling the synchronous engagement or disengagement of the first clutch group (1), the second cylinder group (8) is used for controlling the synchronous engagement or disengagement of the second clutch group (2), the third cylinder (9) is used for controlling the engagement or disengagement of the third clutch (3), and the fourth cylinder (10) is used for controlling the engagement or disengagement of the fourth clutch (4).

3. The clutch and cylinder integrated control hydraulic system according to claim 1, wherein: the first balance valve block (27) is a double-hydraulic control one-way valve.

4. The clutch and cylinder integrated control hydraulic system according to claim 1, wherein: the first control valve (14), the second control valve (15) and the third control valve (16) are all three-position four-way electromagnetic valves.

5. The clutch and cylinder integrated control hydraulic system according to claim 1, wherein: the oil pump comprises a triple oil pump group (24) and a motor (23) for driving the triple oil pump group (24).

6. The integrated clutch and cylinder control hydraulic system as claimed in claim 5, wherein: and a first oil outlet of the triple oil pump group (24) is connected with a second control valve (15) and a third control valve (16), and a second oil outlet is connected with a first control valve (14).

7. The integrated clutch and cylinder control hydraulic system as claimed in claim 6, wherein: a pipeline between a first oil outlet of the triple oil pump set (24) and a third control valve (16) is connected with an oil tank (26) through a first electromagnetic overflow valve (19); and a pipeline between the second oil outlet and the first control valve (14) is connected with an oil tank (26) through a second electromagnetic overflow valve (20).

8. The integrated clutch and cylinder control hydraulic system as claimed in claim 7, wherein: and a first oil outlet and a second oil outlet of the triple oil pump set (24) are respectively provided with a second one-way valve (22).

9. The integrated clutch and cylinder control hydraulic system as claimed in claim 6, wherein: and a third oil outlet of the triple oil pump set (24) is connected with a lubricating oil way (21), and one end, close to the triple oil pump set (24), of the lubricating oil way (21) is connected with an oil tank (26) through a low-pressure overflow valve (25).

10. The clutch and cylinder integrated control hydraulic system according to claim 1, wherein: and oil return pipelines of the first control valve (14), the second control valve (15) and the third control valve (16) are connected together and then are connected with an oil tank (26), and a first one-way valve (13) is arranged on the oil return pipeline between the first control valve (14) and the second control valve (15).

Technical Field

The invention relates to a clutch and oil cylinder comprehensive control hydraulic system, and belongs to the technical field of hydraulic control.

Background

At present, a hydraulic system on a transmission mainly controls a clutch or a brake, and with the demand of the development and diversification of the transmission, higher requirements are put forward on the control system, and the hydraulic system not only needs to complete the control of the clutch and the brake, but also needs to perform related control on various functional oil cylinders.

Therefore, chinese patent publication No. CN110792646A discloses a clutch and cylinder integrated control hydraulic system, in which after an oil pump works, a second safety valve controls the maximum pressure of the entire hydraulic system, a second proportional valve controls the position of a first cylinder through a first limit valve, and a balance valve controls the position of a second cylinder, so that the second cylinder is more accurately controlled than the first limit valve. The oil circuit of the first two-position three-way valve is used for controlling the first middle-position transition valve, the middle position of the first middle-position transition valve plays a throttling role, oil inlet and oil outlet control of the piston is mainly performed by the left position and the right position, the rest two-position three-way valves and the middle-position transition valve control the corresponding clutches in the same mode, the first safety valve is used for controlling the pressure of the left-side oil inlet circuit, and if the pressure is too high, the corresponding oil circuit can be automatically cut off. The simultaneous control of the clutch and the brake in the same hydraulic system is realized, meanwhile, the oil circuit system is simple in structure, the clutches and the oil cylinders can be controlled through expansion connection, and the system can be popularized and used in various systems needing multiple hydraulic actuators.

However, two-position three-way valves and a middle transition valve are needed for controlling each clutch in the system, a limit valve and a proportional valve are needed for controlling each oil cylinder, and when the system is used for controlling a plurality of synchronously acting oil cylinders or clutches, a large number of valves are correspondingly used, so that an oil circuit is too complex.

Disclosure of Invention

In order to solve the technical problem, the invention provides a clutch and oil cylinder comprehensive control hydraulic system.

The invention is realized by the following technical scheme:

the utility model provides a clutch and hydro-cylinder integrated control hydraulic system, includes first balanced valve block, second balanced valve block and third balanced valve block, the one end of first balanced valve block is passed through first control valve and oil pump and is connected with the oil tank, and other end parallel connection has fifth hydro-cylinder group and sixth hydro-cylinder group, the one end of second balanced valve block is passed through third control valve and oil pump and is connected with the oil tank, and other end parallel connection has first hydro-cylinder group and second hydro-cylinder group, the one end of third balanced valve block is passed through second control valve and oil pump and is connected with the oil tank, and other end parallel connection has third hydro-cylinder and fourth hydro-cylinder.

The fifth oil cylinder group is used for controlling the synchronous connection or disconnection of the fifth clutch group, the sixth oil cylinder group is used for controlling the synchronous connection or disconnection of the sixth clutch group, the first oil cylinder group is used for controlling the synchronous connection or disconnection of the first clutch group, the second oil cylinder group is used for controlling the synchronous connection or disconnection of the second clutch group, the third oil cylinder is used for controlling the connection or disconnection of the third clutch, and the fourth oil cylinder is used for controlling the connection or disconnection of the fourth clutch.

The first balance valve block is a double-hydraulic control one-way valve.

The first control valve, the second control valve and the third control valve are all three-position four-way electromagnetic valves.

The oil pump comprises a triple oil pump group and a motor for driving the triple oil pump group.

And a first oil outlet of the triple oil pump group is connected with a second control valve and a third control valve, and a second oil outlet is connected with a first control valve.

And a pipeline between a first oil outlet of the triple oil pump set and a third control valve is connected with the oil tank through a first electromagnetic overflow valve, and a pipeline between a second oil outlet and the first control valve is connected with the oil tank through a second electromagnetic overflow valve.

And a first oil outlet and a second oil outlet of the triple oil pump group are respectively provided with a second one-way valve.

And a third oil outlet of the triple oil pump set is connected with a lubricating oil path, and one end of the lubricating oil path, which is close to the triple oil pump set, is connected with an oil tank through a low-pressure overflow valve.

And oil return pipelines of the first control valve, the second control valve and the third control valve are connected together and then connected with an oil tank, and a first one-way valve is arranged on the oil return pipeline between the first control valve and the second control valve.

The invention has the beneficial effects that: when the device is used for controlling a plurality of oil cylinders or clutches which act synchronously, the use number of valves is reduced, and the oil circuit composition is greatly simplified. In addition, the triple oil pump group is adopted as a power source, and the simplification of an oil way is facilitated. An electromagnetic overflow valve is installed on the control oil path to control the maximum pressure, and a low-pressure overflow valve is installed on the lubricating oil path to control the maximum pressure, so that the safe operation of the whole hydraulic system is ensured.

Drawings

FIG. 1 is a schematic diagram of a hydraulic system of the present invention.

In the figure: 1-a first clutch group, 2-a second clutch group, 3-a third clutch, 4-a fourth clutch, 5-a fifth clutch group, 6-a sixth clutch group, 7-a first cylinder group, 8-a second cylinder group, 9-a third cylinder, 10-a fourth cylinder, 11-a fifth cylinder group, 12-a sixth cylinder group, 13-a first one-way valve, 14-a first control valve, 15-a second control valve, 16-a third control valve, 19-a first electromagnetic spill valve, 20-a second electromagnetic spill valve, 21-a lubricating oil path, 22-a second one-way valve, 23-a motor, 24-a triple oil pump group, 25-a low pressure spill valve, 26-an oil tank, 27-a first balance valve block, 28-a second balance valve block, 29-third balanced valve block.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

As shown in fig. 1, the hydraulic system for comprehensive control of a clutch and a cylinder according to the present invention includes a first balanced valve block 27, a second balanced valve block 28, and a third balanced valve block 29, wherein one end of the first balanced valve block 27 is connected to an oil tank 26 through a first control valve 14 and an oil pump, the other end is connected in parallel to a fifth cylinder group 11 and a sixth cylinder group 12, one end of the second balanced valve block 28 is connected to the oil tank 26 through a third control valve 16 and an oil pump, the other end is connected in parallel to a first cylinder group 7 and a second cylinder group 8, one end of the third balanced valve block 29 is connected to the oil tank 26 through a second control valve 15 and an oil pump, and the other end is connected in parallel to a third cylinder 9 and a fourth cylinder 10.

The fifth cylinder group 11 is used for controlling the fifth clutch group 5 to be synchronously engaged or disengaged, the sixth cylinder group 12 is used for controlling the sixth clutch group 6 to be synchronously engaged or disengaged, the first cylinder group 7 is used for controlling the first clutch group 1 to be synchronously engaged or disengaged, the second cylinder group 8 is used for controlling the second clutch group 2 to be synchronously engaged or disengaged, the third cylinder 9 is used for controlling the third clutch 3 to be engaged or disengaged, and the fourth cylinder 10 is used for controlling the fourth clutch 4 to be engaged or disengaged.

The first balance valve block 27 is a double pilot operated check valve.

The first control valve 14, the second control valve 15 and the third control valve 16 are all three-position four-way solenoid valves.

The oil pump includes a triple oil pump unit 24 and a motor 23 for driving the triple oil pump unit 24.

The first oil outlet of the triple oil pump group 24 is connected with the second control valve 15 and the third control valve 16, and the second oil outlet is connected with the first control valve 14.

And a pipeline between a first oil outlet of the triple oil pump group 24 and the third control valve 16 is connected with an oil tank 26 through a first electromagnetic overflow valve 19, and a pipeline between a second oil outlet and the first control valve 14 is connected with the oil tank 26 through a second electromagnetic overflow valve 20.

And a second check valve 22 is arranged at the first oil outlet and the second oil outlet of the triple oil pump set 24.

And a third oil outlet of the triple oil pump set 24 is connected with a lubricating oil path 21, and one end of the lubricating oil path 21, which is close to the triple oil pump set 24, is connected with an oil tank 26 through a low-pressure overflow valve 25.

And the return pipelines of the first control valve 14, the second control valve 15 and the third control valve 16 are connected together and then connected with the oil tank 26, and the first one-way valve 13 is arranged on the return pipeline between the first control valve 14 and the second control valve 15.

The invention relates to a clutch and oil cylinder comprehensive control hydraulic system, which has the working principle as follows:

after the motor 23 and the triple oil pump unit 24 are started, the maximum pressure of the whole hydraulic system is controlled by the first electromagnetic overflow valve 19, the second electromagnetic overflow valve 20 and the low-pressure overflow valve 25.

The third control valve 16 controls the positions of the first and second cylinder groups 7, 8, thereby controlling the engagement and disengagement of the first and second clutch groups 1, 2. When the valve core of the third control valve 16 is positioned at the left working position, the first oil cylinder group 7 is filled with oil, the first clutch group 1 is engaged, and the second clutch group 2 is disengaged; when the spool of the third control valve 16 is in the right operating position, the second cylinder group 8 is filled with oil, the second clutch group 2 is engaged, and the first clutch group 1 is disengaged. The positions of the first cylinder group 7 and the second cylinder group 8 are maintained by the second balance valve block 28.

Similarly, the second control valve 15 controls the positions of the third cylinder 9 and the fourth cylinder 10 respectively, so as to control the third clutch 3 and the fourth clutch 4 to be engaged or disengaged, and the balance valve block three 29 maintains the positions of the third cylinder 9 and the fourth cylinder 10.

Similarly, the first control valve 14 controls the positions of the fifth cylinder group 11 and the sixth cylinder group 12 to engage or disengage the fifth clutch group 5 and the sixth clutch group 6, respectively, and the balancing valve block one 27 holds the positions of the fifth cylinder group 11 and the sixth cylinder group 12.

The entire system is lubricated by the lubricating oil passage 21.

The clutch and oil cylinder comprehensive control hydraulic system provided by the invention is used for controlling a plurality of synchronously acting oil cylinders or clutches, is beneficial to reducing the use number of valves and greatly simplifies the oil circuit structure. In addition, the triple oil pump group 24 is adopted as a power source, and the simplification of an oil circuit is facilitated. The control oil circuit is provided with an electromagnetic overflow valve for controlling the maximum pressure, and the lubricating oil circuit 21 is provided with a low-pressure overflow valve 25 for controlling the maximum pressure, so that the safe operation of the whole hydraulic system is ensured.