阅读说明：本技术 挖掘机回转马达及挖掘机回转液压系统 (Excavator rotation motor and excavator rotation hydraulic system ) 是由 宋旭东 荆玉涛 董立队 郭志学 李宣辰 张明康 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种挖掘机回转马达及挖掘机回转液压系统,其属于工程机械技术领域。它解决了现有技术中传统回转马达存在的外接油口多、管路多而出现的连接复杂、液压油渗漏等缺陷。其主体结构包括回转马达,所述回转马达包括制动阀、制动油缸、马达、回转装置和制动装置,所述马达与回转装置连接,所述制动装置分别与制动阀的C2口和信号a口连接,所述制动阀的A2口与制动油缸连接,B2口与Dr口连接。本发明主要用于挖掘机等工程机械上。(The invention discloses an excavator rotation motor and an excavator rotation hydraulic system, and belongs to the technical field of engineering machinery. The rotary motor overcomes the defects of complex connection, hydraulic oil leakage and the like caused by the fact that a traditional rotary motor has a plurality of external oil ports and pipelines in the prior art. The main structure of the hydraulic brake comprises a rotary motor, the rotary motor comprises a brake valve, a brake cylinder, a motor, a rotary device and a brake device, the motor is connected with the rotary device, the brake device is respectively connected with a port C2 and a port signal a of the brake valve, a port A2 of the brake valve is connected with the brake cylinder, and a port B2 is connected with a port Dr. The invention is mainly used for engineering machinery such as excavators and the like.)

1. An excavator swing motor, includes swing motor (1), its characterized in that: the rotary motor (1) comprises a brake valve (106), a brake oil cylinder (107), a motor (114), a rotary device and a brake device, wherein the motor (114) is connected with the rotary device, the brake device is respectively connected with a port C2 and a port signal a of the brake valve (106), a port A2 of the brake valve (106) is connected with the brake oil cylinder (107), and a port B2 is connected with a port Dr.

2. The excavator swing motor of claim 1, wherein: the rotary motor (1) further comprises an overflow valve A (104) and an overflow valve B (105), and oil ports on two sides of the motor (114) are respectively connected with the overflow valve A (104) and the overflow valve B (105).

3. The excavator swing motor of claim 2, wherein: the brake device comprises a balance valve A (101), and the balance valve A (101) is respectively connected with a port C2 of a brake valve (106), a signal port a and a motor (114).

4. The excavator swing motor of claim 3, wherein: the slewing device comprises a one-way valve A (102) and a one-way valve B (103), signal oil ports on two sides of a balance valve A (101) are respectively connected with an oil inlet of the one-way valve A (102) and an oil inlet of the one-way valve B (103), an oil outlet of the one-way valve A (102) is connected with a side B1 of a motor (114), and an oil outlet of the one-way valve B (103) is connected with a side A1 of the motor (114).

5. The excavator swing motor of claim 2, wherein: the brake device comprises a one-way valve C (110) and a one-way valve D (111), wherein an oil outlet of the one-way valve C (110) and an oil outlet of the one-way valve D (111) are respectively connected with a port C2 and a signal port a of the brake valve (106).

6. The excavator swing motor of claim 5, wherein: the slewing device comprises a check valve A (102), a check valve B (103) and a balance valve B (109), wherein an oil outlet of the check valve A (102) is connected with an oil inlet of a check valve D (111) and a B1 side of a motor (114) respectively, an oil outlet of the check valve B (103) is connected with an oil inlet of a check valve C (110) and an A1 side of the motor (114) respectively, and the balance valve B (109) is connected with the motor (114).

7. The excavator swing motor of claim 5, wherein: the slewing device comprises a hydraulic control one-way valve A (112) and a hydraulic control one-way valve B (113), wherein the hydraulic control one-way valve A (112) is respectively connected with the B1 side of the motor (114) and the oil inlet of the one-way valve D (111), and the hydraulic control one-way valve B (113) is respectively connected with the A1 side of the motor (114) and the oil inlet of the one-way valve C (110).

8. The utility model provides an excavator gyration hydraulic system, includes gyration guide handle (2), main valve gyration antithetical couplet (3), main pump (4) and hydraulic tank (6), its characterized in that: the excavator slewing hydraulic system further comprises a slewing motor (1) according to any one of claims 1 to 7, the main valve slewing gear (3) is connected with an A port, a B port of the slewing motor (1), a main pump (4) and a hydraulic oil tank (6), and the slewing pilot handle (2) is connected with pilot oil ports on two sides of the main valve slewing gear (3).

9. The excavator slewing hydraulic system of claim 8, wherein: the middle position of the main valve rotary joint (3) is Y-shaped function.

10. The excavator slewing hydraulic system of claim 9, wherein: the excavator rotation hydraulic system further comprises a pilot oil source valve (5), and the pilot oil source valve (5) is connected with an oil outlet of the main pump (4).

The technical field is as follows:

the invention belongs to the technical field of engineering machinery, and particularly relates to an excavator rotation motor and an excavator rotation hydraulic system.

Background art:

in the prior art, two excavators realize the rotation of the whole excavator through a rotation motor, the first one is shown in figure 5,

firstly, a rotation implementation process: the operator operates the rotary pilot handle, connects the pilot oil path to push the main valve rotary union valve core, so that the hydraulic oil of the main pump enters the port B of the motor through the valve core hole, and the hydraulic oil returns from the port A through the main valve rotary union valve core to finish the whole rotary oil supply process.

Secondly, a rotation braking process: an operator operates a rotary pilot handle, a main valve rotary linkage valve core is closed, oil of a main pump cannot enter a motor, oil supply and oil return from an A, B port of the motor are stopped, the motor is dragged to rotate continuously due to inertia, and oil is required to be supplemented to an M port of the motor to prevent the motor from being emptied at the moment; when the pressure generated by the rotation inertia of the whole machine is higher than the set pressure of the overflow valve, the overflow valve overflows, and the overflowed hydraulic oil enters the motor oil supplementing opening to supplement partial oil.

Thirdly, braking by a rotary motor: a friction plate is arranged in the rotary motor and used for braking when the motor stops use to prevent the motor from rotating, pilot oil is introduced into the motor through an external PG port oil way to relieve the braking, and the motor can normally rotate; when no pilot oil enters, the friction sheet is pressed by spring force, the motor is braked to prevent the motor from rotating, and when the pilot oil enters, the friction sheet overcomes the spring force, and the motor releases the brake.

Second, as shown in fig. 6, the second type is different from the first type mainly in releasing the swing motor brake,

braking release of the rotary motor: the friction plate is arranged in the rotary motor and used for braking when the motor stops using to prevent the motor from rotating, the motor introduces pilot oil through an external PG port oil way to relieve braking, but a shuttle valve is added, high-pressure oil is screened out from a rotary pilot handle and enters an SH oil port of the rotary motor to push a valve core, and the pilot oil of a PG oil port enters a piston cavity braked by the rotary motor to relieve braking of the motor, so that the rotary motor can normally rotate; the friction plate is pressed by spring force when no pilot oil enters, the motor is braked to prevent the motor from rotating, and when the pilot oil enters, the spring force is overcome, and the motor releases braking.

However, in the first or second scheme, the rotary motor must be provided with the oil supplementing port M and the external pressure oil port and the pipeline for releasing the braking of the rotary motor, so that the rotary motor has many external oil ports and pipelines, and the problems of complex connection, hydraulic oil leakage and the like are caused.

The invention content is as follows:

the invention aims to overcome the defects of the prior art and provides an excavator rotary motor and an excavator rotary hydraulic system.

In order to realize the purpose, the invention is realized by adopting the following technical scheme:

the utility model provides an excavator swing motor, includes the swing motor, the swing motor includes brake valve, brake cylinder, motor, slewer and arresting gear, the motor is connected with the slewer, arresting gear is connected with the C2 mouth and the signal a mouth of brake valve respectively, the A2 mouth and the brake cylinder of brake valve are connected, and the B2 mouth is connected with the Dr mouth.

Preferably, the rotary motor further comprises an overflow valve a and an overflow valve B, and oil ports on two sides of the motor are respectively connected with the overflow valve a and the overflow valve B.

Preferably, the brake device comprises a balance valve A which is respectively connected with a port C2 of the brake valve, a port signal a and a motor.

Preferably, the slewing device comprises a check valve a and a check valve B, signal oil ports on two sides of the balance valve a are respectively connected with an oil inlet of the check valve a and an oil inlet of the check valve B, an oil outlet of the check valve a is connected with a side B1 of the motor, and an oil outlet of the check valve B is connected with a side a1 of the motor.

Preferably, the brake device comprises a one-way valve C and a one-way valve D, and an oil outlet of the one-way valve C and an oil outlet of the one-way valve D are respectively connected with a port C2 and a signal port a of the brake valve.

Preferably, the slewing device comprises a check valve A, a check valve B and a balance valve B, an oil outlet of the check valve A is respectively connected with an oil inlet of the check valve D and the B1 side of the motor, an oil outlet of the check valve B is respectively connected with an oil inlet of the check valve C and the A1 side of the motor, and the balance valve B is connected with the motor.

Preferably, the slewing device comprises a pilot-controlled check valve A and a pilot-controlled check valve B, the pilot-controlled check valve A is respectively connected with the B1 side of the motor and the oil inlet of the check valve D, and the pilot-controlled check valve B is respectively connected with the A1 side of the motor and the oil inlet of the check valve C.

The excavator rotation hydraulic system comprises a rotation pilot handle, a main valve rotation joint, a main pump and a hydraulic oil tank, and further comprises any one of the rotation motors, wherein the main valve rotation joint is connected with an A port, a B port, the main pump and the hydraulic oil tank of the rotation motor, and the rotation pilot handle is connected with pilot oil ports on two sides of the main valve rotation joint.

Preferably, the middle position of the main valve rotary joint is Y-shaped function.

Preferably, the excavator slewing hydraulic system further comprises a pilot oil source valve, and the pilot oil source valve is connected with an oil outlet of the main pump.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the balance valve A, the balance valve B, the brake valve and the main valve rotary union valve core are added into the rotary motor, and the Y-shaped valve core is used, so that the oil ports A/B of the rotary motor are all communicated with the return oil T when the main valve core is positioned at the middle position, thereby realizing the internal self-locking, the releasing and the oil supplementing of the rotary motor and achieving the purpose of removing the oil supplementing port and the brake releasing port of the rotary motor;

2. the method has the advantages that the inner part of the existing rotary motor of the excavator and the rotary valve core of the main valve are adjusted in multiple places, the oil supplementing port and the brake releasing port which are externally connected with the existing rotary motor are removed, and the problems that the rotary motor is large in external oil ports, multiple in pipelines, complex in connection, hydraulic oil leakage and the like are solved.

Description of the drawings:

FIG. 1 is a schematic diagram of embodiment 2 of the present invention;

FIG. 2 is a schematic diagram of embodiment 3 of the present invention;

FIG. 3 is a schematic diagram of embodiment 4 of the present invention;

FIG. 4 is a hydraulic schematic diagram of embodiment 5 of the present invention;

FIG. 5 is a first hydraulic schematic of a swing hydraulic system of a prior art excavator;

fig. 6 is a hydraulic schematic diagram of a swing hydraulic system of a conventional excavator.

In the figure: 1. a rotary motor; 2. a rotary pilot handle; 3. the main valve is connected with the main valve in a rotating way; 4. a main pump; 5. a pilot oil source valve; 6. a hydraulic oil tank; 101. a balance valve A; 102. a one-way valve A; 103. a check valve B; 104. an overflow valve A; 105. an overflow valve B; 106. a brake valve; 107. a brake cylinder; 108. a speed reducer; 109. a balance valve B; 110. a check valve C; 111. a check valve D; 112. a hydraulic control one-way valve A; 113. a hydraulic control one-way valve B; 114. a motor; 115. a choke; 116. an orifice.

The specific implementation mode is as follows:

the invention is further illustrated by the following specific examples in combination with the accompanying drawings.

Example 1:

an excavator swing motor comprises a swing motor 1, wherein the swing motor 1 comprises a brake valve 106, a brake cylinder 107, a motor 114, a swing device and a brake device, the motor 114 is connected with the swing device, the brake device is respectively connected with a port C2 and a port signal a of the brake valve 106, a port A2 of the brake valve 106 is connected with the brake cylinder 107, and a port B2 is connected with a port Dr. The spring chamber of the brake cylinder 107 is connected to the Dr port, which is connected back to the hydraulic tank 6. The motor 114 is connected to the speed reducer 108, and the speed reducer 108 outputs the motor 114 after reducing the speed.

The rotary motor 1 further comprises an overflow valve A104 and an overflow valve B105, oil ports on two sides of the motor 114 are respectively connected with the overflow valve A104 and the overflow valve B105, and the overflow valve A104 and the overflow valve B105 are connected in parallel. The overflow valve A104 and the overflow valve B105 enable the cavities A1/B1 to be communicated, and when the pressure of the cavity A1 is higher than the set pressure of the overflow valve B105, hydraulic oil overflows to the cavity B1; when the pressure of the cavity B1 is higher than the set pressure of the overflow valve A104, the hydraulic oil overflows to the cavity A1, and the overflow pressures of the overflow valve A104 and the overflow valve B105 are set to be consistent.

Example 2:

as shown in fig. 1, the brake device of the excavator swing motor includes a balance valve a101, and the balance valve a101 is connected to a port C2 of a brake valve 106, a signal port a, a motor 114, an external oil source port a, and an external oil source port B, respectively.

The balance valve A101 is of a three-position five-way structure, springs are arranged on two sides of a valve core and used for returning the valve core, throttling holes 116 are arranged on two sides of the valve core of the balance valve A101, the valve core can smoothly and stably move through the throttling holes 116, and impact is reduced.

The slewing device comprises a one-way valve A102 and a one-way valve B103, signal oil ports on two sides of a balance valve A101 are respectively connected with an oil inlet of the one-way valve A102 and an oil inlet of the one-way valve B103, an oil outlet of the one-way valve A102 is connected with the side B1 of the motor 114, and an oil outlet of the one-way valve B103 is connected with the side A1 of the motor 114. The other portions are the same as in example 1.

Example 3:

as shown in fig. 2, the braking device of the excavator swing motor comprises a one-way valve C110 and a one-way valve D111, and an oil outlet of the one-way valve C110 and an oil outlet of the one-way valve D111 are respectively connected with a port C2 and a port signal a of the brake valve 106. Check valve C110 and check valve D111 take pressure signals from the main oil passage and apply the signals to brake valve 106.

The slewing device comprises a one-way valve A102, a one-way valve B103 and a balance valve B109, wherein an oil outlet of the one-way valve A102 is respectively connected with an oil inlet of a one-way valve D111 and the B1 side of a motor 114, an oil outlet of the one-way valve B103 is respectively connected with an oil inlet of a one-way valve C110 and the A1 side of the motor 114, and the balance valve B109 is connected with the B1 side, the A1 side, an external oil source A port and an external oil source B port of the motor 114. The other portions are the same as in example 1.

Check valves a102 and B103 are provided in the main oil passage of the a/B port of the swing motor 1 to prevent the hydraulic oil of the swing motor 1 from flowing in the reverse direction. The balance valve B109 is of a three-position four-way structure, and springs are arranged on two sides of the valve core and used for returning the valve core; the throttle holes 116 are arranged on two sides of the valve core, so that the valve core can smoothly and stably move, and impact is reduced.

Example 4:

as shown in fig. 3, the braking device of the excavator swing motor comprises a one-way valve C110 and a one-way valve D111, and an oil outlet of the one-way valve C110 and an oil outlet of the one-way valve D111 are respectively connected with a port C2 and a port signal a of the brake valve 106.

The slewing device comprises a hydraulic control one-way valve A112 and a hydraulic control one-way valve B113, wherein the hydraulic control one-way valve A112 is respectively connected with the B1 side of the motor 114, the oil inlet of the one-way valve D111, the external oil source A port and the external oil source B port, and the hydraulic control one-way valve B113 is respectively connected with the A1 side of the motor 114, the oil inlet of the one-way valve C110, the external oil source A port and the external oil source B port. The other portions are the same as in example 1.

When high pressure is fed into the port B, the check valve in the port A hydraulic control check valve B113 can be pushed to open for oil return, and when high pressure is fed into the port A, the check valve in the port B hydraulic control check valve A112 can be pushed to open for oil return; in addition, the throttling ports 115 are arranged between the port A and the hydraulic control one-way valve A112 and between the port B and the hydraulic control one-way valve B113, and the control oil path increases throttling, so that the valve core can move smoothly and stably, and the impact is reduced.

Example 5:

as shown in fig. 4, a revolving hydraulic system of an excavator includes a revolving pilot handle 2, a main valve revolving joint 3, a main pump 4, a pilot oil source valve 5, a hydraulic oil tank 6, and a revolving motor 1 according to any one of embodiments 1 to 4, wherein the main valve revolving joint 3 is connected to an a port, a B port of the revolving motor 1, the main pump 4, and the hydraulic oil tank 6, the revolving pilot handle 2 is connected to pilot oil ports on both sides of the main valve revolving joint 3, and the pilot oil source valve 5 is connected to an oil outlet of the main pump 4.

The middle position of the main valve rotary union 3 is Y-shaped, and oil return T is communicated with the oil ports A/B of the rotary motor 1 to supplement oil during the middle position.

The specific implementation process of the present invention is illustrated by example 2:

firstly, a rotation implementation process: an operator operates the rotary pilot handle 2 to connect a pilot oil path to push a valve core of the main valve rotary joint 3, so that hydraulic oil of a main pump 4 enters a port B of the rotary motor 1 through a valve core hole, the hydraulic oil of the port B enters the motor 114 through the one-way valve A102, high-pressure oil of the port B simultaneously acts on the left side of the valve core of the balance valve A101, the valve core moves to the right, the valve core of the balance valve A101 is positioned at the left position, the hydraulic oil entering from the port B returns through the motor 114, the hydraulic oil enters the valve core of the main valve rotary joint 3 through the port A through the valve core of the balance valve A101 to return, and the whole rotary oil supply process is completed.

Secondly, a rotation braking process: an operator operates the rotary pilot handle 2 to close the valve core of the main valve rotary joint 3, oil of the main pump 4 cannot enter the motor 114, oil supply and oil return from an A, B port of the rotary motor 1 are stopped, at the moment, the motor 114 is dragged to continuously rotate due to inertia of the whole machine, at the moment, oil is required to be supplied to an A1/B1 port of the motor 114 to prevent the motor 114 from being sucked empty, at the moment, the valve core of the main valve rotary joint 3 is in a middle position, the valve core uses a Y-shaped valve core, and the A/B oil ports of the rotary motor 1 are communicated with the hydraulic oil tank 6 to achieve the purpose of oil supply; when the pressure generated by the rotation inertia of the whole machine is higher than the set pressure of the relief valve A104/the relief valve B105, the relief valve A104/the relief valve B105 overflows, and the overflowed hydraulic oil enters the motor 114 to partially replenish oil in the side oil passage.

Thirdly, braking and releasing of the rotary motor: the friction plate is installed inside the rotary motor 1 for braking when the motor 114 is stopped to prevent the motor 114 from rotating, and the motor brake release process is as follows: an operator operates the rotary pilot handle 2, connects a pilot oil path to push a valve core of the main valve rotary joint 3, so that hydraulic oil of a main pump 4 enters a port B of the rotary motor 1 through the valve core of the main valve rotary joint 3, at the moment, the valve core of the balance valve A101 moves rightwards, the valve core of the balance valve A101 is positioned on the left side, an intermediate oil path is communicated, so that high-pressure oil reaches the valve core of the brake valve 106 through the valve core, the pressure oil enters a port a on the right side of the brake valve 106 to push the valve core of the brake valve 106 to move leftwards, the high-pressure oil in front of the valve core of the brake valve 106 enters a brake oil cylinder 107, and the brake of the rotary motor 1 is relieved by overcoming the spring force; when an operator operates the rotary pilot handle 2 to close the valve core of the main valve rotary joint 3, oil liquid of the main pump 4 cannot enter the rotary motor 1, no high-pressure oil exists at the A, B port of the rotary motor 1, the balance valve A101 returns to the middle position, no high-pressure oil exists at the a side of the brake valve 106, the valve core is moved to the left position by the left side spring force, pressure oil of the brake oil cylinder 107 flows to the Dr port through the throttle hole in the valve core of the brake valve 106, and after the time delay of the pressure oil passing through the throttle hole is 5-6s, the rotary motor 1 realizes self-locking braking.