阅读说明：本技术 液压马达控制系统和机械设备 (Hydraulic motor control system and mechanical equipment ) 是由 刘永东 汪建利 陈嫦 于 2019-10-18 设计创作，主要内容包括：本发明提供了一种液压马达控制系统和机械设备。所述液压马达控制系统包括：液压马达；通断阀组件,所述通断阀组件用于导通和断开所述液压马达的油路连接；驱动部件,与所述通断阀组件连接,用于控制所述通断阀组件导通所述液压马达的油路连接；反馈组件,分别与所述液压马达和所述通断阀组件连接,在液压马达转动时,具有驱动所述通断阀组件向断开所述液压马达的油路连接动作的趋势,直至断开所述液压马达的油路连接。本发明能够提高液压马达控制的精准程度和稳定性。(The invention provides a hydraulic motor control system and mechanical equipment. The hydraulic motor control system includes: a hydraulic motor; the on-off valve assembly is used for conducting and disconnecting the oil circuit connection of the hydraulic motor; the driving component is connected with the on-off valve assembly and is used for controlling the on-off valve assembly to conduct oil circuit connection of the hydraulic motor; and the feedback assembly is respectively connected with the hydraulic motor and the on-off valve assembly, and when the hydraulic motor rotates, the feedback assembly drives the on-off valve assembly to tend to disconnect the oil circuit connection of the hydraulic motor until the oil circuit connection of the hydraulic motor is disconnected. The invention can improve the accuracy and stability of the hydraulic motor control.)

1. A hydraulic motor control system, comprising:

a hydraulic motor;

the on-off valve assembly is used for conducting and disconnecting the oil circuit connection of the hydraulic motor;

the driving component is connected with the on-off valve assembly and is used for controlling the on-off valve assembly to conduct oil circuit connection of the hydraulic motor;

and the feedback assembly is respectively connected with the hydraulic motor and the on-off valve assembly, and when the hydraulic motor rotates, the feedback assembly drives the on-off valve assembly to tend to disconnect the oil circuit connection of the hydraulic motor until the oil circuit connection of the hydraulic motor is disconnected.

2. The hydraulic motor control system of claim 1, comprising:

a housing;

the hydraulic motor, the on-off valve component and the feedback component are arranged in the shell, two external oil paths are arranged on the shell, one of the two external oil paths is used for connecting an external pressure oil source, the other external oil return tank is used for connecting and disconnecting the two external oil paths and the two oil inlet and outlet ports of the hydraulic motor, and one external oil path is connected with the oil inlet and outlet ports of one hydraulic motor.

3. The hydraulic motor control system of claim 2,

the driving part, the on-off valve assembly, the feedback assembly and the hydraulic motor are sequentially arranged along the length direction of the shell.

4. The hydraulic motor control system of claim 3, comprising:

the speed reducer is arranged in the shell and connected with the hydraulic motor, and the speed reducer is arranged on one side of the hydraulic motor, which faces away from the feedback assembly.

5. The hydraulic motor control system of claim 4, wherein the housing comprises:

a fixed housing and a movable housing, the fixed housing and the movable housing being rotatably connected;

the driving part, the on-off valve assembly, the feedback assembly, the hydraulic motor and the speed reducer are fixed through the fixed shell, an output shaft of the speed reducer is connected with the movable shell through the planetary transmission assembly, and the movable shell is used for transmitting power outwards.

6. The hydraulic motor control system according to any one of claims 2 to 5, wherein the on-off valve assembly includes:

the first valve sleeve is internally provided with a first valve cavity;

the movable valve core is rotatably arranged in the first valve cavity and is suitable for axially reciprocating in the first valve cavity, two oil passages are arranged on the movable valve core along the circumferential direction of the movable valve core, and when the on-off valve assembly is switched on, two external oil passages are connected with two oil inlets and two oil outlets of the hydraulic motor through the two oil passages;

the movable valve core moves in the first valve cavity in the forward direction to enable the on-off valve assembly to conduct the oil circuit connection of the hydraulic motor, and moves in the first valve cavity in the reverse direction to enable the on-off valve assembly to disconnect the oil circuit connection of the hydraulic motor.

7. The hydraulic motor control system of claim 6,

one of the feedback assembly and the drive member is slidably or threadably coupled to the movable spool, and the other is threadably coupled to the movable spool.

8. The hydraulic motor control system according to any one of claims 1 to 5, characterized in that the drive member includes:

the driving motor connecting sleeve is internally provided with a motor connecting sleeve inner cavity;

the on-off valve assembly and the driving motor are connected in an inner cavity of the motor connecting sleeve.

9. The hydraulic motor control system according to any one of claims 1 to 5, characterized by comprising:

and the feedback assembly speed reducer is arranged between the feedback assembly and the hydraulic motor, and the feedback assembly and the hydraulic motor are mutually connected through the feedback assembly speed reducer.

10. A mechanical device, comprising: a hydraulic motor control system as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of hydraulic motors, in particular to a hydraulic motor control system and mechanical equipment.

Background

A hydraulic motor is a power actuator that outputs power by converting hydraulic pressure energy into mechanical energy. The hydraulic motor has the advantages of high power density, distributed arrangement with a power source and the like.

However, since the rotational accuracy of the hydraulic motor is difficult to be accurately controlled, its application to precision instruments and equipment is always limited.

Disclosure of Invention

The present invention is directed to solving at least one of the above problems.

A first object of the present invention is to provide a hydraulic motor control system.

A second object of the invention is to provide a mechanical device.

To achieve the first object of the present invention, an embodiment of the present invention provides a hydraulic motor control system including: a hydraulic motor; the on-off valve assembly is used for conducting and disconnecting the oil circuit connection of the hydraulic motor; the driving component is connected with the on-off valve assembly and is used for controlling the on-off valve assembly to conduct oil circuit connection of the hydraulic motor; and the feedback assembly is respectively connected with the hydraulic motor and the on-off valve assembly, and when the hydraulic motor rotates, the feedback assembly drives the on-off valve assembly to tend to disconnect the oil circuit connection of the hydraulic motor until the oil circuit connection of the hydraulic motor is disconnected.

Through the technical scheme, the rotation precision of the hydraulic motor can be accurately controlled. Specifically, in the technical scheme, the on-off valve assembly is used for conducting or disconnecting an oil circuit connection of the hydraulic motor, wherein the driving component drives the on-off valve assembly to achieve a conducting effect, the feedback assembly controls the on-off valve assembly to achieve a disconnecting effect, and the feedback assembly is connected with the hydraulic motor, so that the hydraulic motor can drive the feedback assembly to correspondingly operate, such as rotate or move and the like, when in work. Because the feedback assembly is connected with the on-off valve assembly, the operation of the feedback assembly drives the on-off valve assembly to generate state change, and therefore the effect of disconnecting the oil circuit of the hydraulic motor is achieved. Through the technical scheme, after the hydraulic motor outputs rated power or rotates for rated circles, the on-off valve assembly can be closed timely and accurately under the driving of the hydraulic motor, so that a hydraulic oil transmission pipeline of the hydraulic motor is closed or disconnected, and the operation of the motor is stopped. Therefore, the embodiment can accurately control the output precision of the hydraulic motor when outputting rated power and improve the precision degree of the hydraulic motor control.

In addition, the technical solutions provided by the above embodiments of the present invention may also have the following additional technical features.

Among the above-mentioned technical scheme, hydraulic motor control system includes: a housing; the hydraulic motor, the on-off valve component and the feedback component are arranged in the shell, two external oil paths are arranged on the shell, one of the two external oil paths is used for connecting an external pressure oil source, the other external oil return tank is used for connecting and disconnecting the two external oil paths and the two oil inlet and outlet ports of the hydraulic motor, and one external oil path is connected with the oil inlet and outlet ports of one hydraulic motor.

In the technical scheme, the hydraulic motor, the on-off valve assembly and the feedback assembly are arranged on the shell together, so that the hydraulic motor, the on-off valve assembly and the feedback assembly are integrally connected with one another, the whole size of the hydraulic motor control system is reduced, the components are convenient to assemble with one another, and the whole operation reliability and the working efficiency of the hydraulic motor control system are improved.

In any of the above technical solutions, the driving part, the on-off valve assembly, the feedback assembly, and the hydraulic motor are sequentially disposed along a length direction of the housing.

In the technical scheme, the driving part, the on-off valve component, the feedback component and the hydraulic motor are sequentially arranged along the length direction of the shell, so that the driving part, the on-off valve component, the feedback component and the hydraulic motor are coaxially connected, direct and effective power transmission among the parts is conveniently realized on the basis of further reducing the size, and the integral operation reliability of the hydraulic motor control system is further improved.

In any one of the above technical solutions, the hydraulic motor control system includes: the speed reducer is arranged in the shell and connected with the hydraulic motor, and the speed reducer is arranged on one side of the hydraulic motor, which faces away from the feedback assembly.

In this technical scheme, set up speed reducer and feedback subassembly respectively in hydraulic motor's both sides, from this, hydraulic motor can carry out drive control to the feedback subassembly promptly, can also realize the rotational speed of its output, or the nimble regulation of moment of torsion to speed reducer and feedback subassembly can not mutual interference or hinder, thereby this technical scheme can further realize integrating and the miniaturization of casing.

In any one of the above technical solutions, the housing includes: a fixed housing and a movable housing, the fixed housing and the movable housing being rotatably connected; the driving component, the on-off valve component, the feedback component, the hydraulic motor and the speed reducer are fixed through the fixed shell, an output shaft of the speed reducer is connected with the movable shell through the planetary transmission component, and the movable shell is used for transmitting power outwards.

In this technical scheme, fixed casing can make drive component, on-off valve subassembly, feedback subassembly, hydraulic motor and speed reducer between interconnect fixed effectively. The movable housing follows the reducer to rotate through the action of the planetary transmission assembly. From this, this technical scheme can set up drive unit, break-make valve subassembly, feedback subassembly, hydraulic motor and speed reducer jointly with the casing through the fixed casing and the movable casing of mutually supporting to realize hydraulic motor control system's integral type design.

In any one of the above technical solutions, the on-off valve assembly includes: the first valve sleeve is internally provided with a first valve cavity; the movable valve core is rotatably arranged in the first valve cavity and is suitable for axially reciprocating in the first valve cavity, two oil passages are arranged on the movable valve core along the circumferential direction of the movable valve core, and when the on-off valve assembly is switched on, two external oil passages are connected with two oil inlets and two oil outlets of the hydraulic motor through the two oil passages; the movable valve core moves in the first valve cavity in the forward direction to enable the on-off valve assembly to conduct the oil circuit connection of the hydraulic motor, and moves in the first valve cavity in the reverse direction to enable the on-off valve assembly to disconnect the oil circuit connection of the hydraulic motor.

According to the technical scheme, the hydraulic motor can be controlled by the mutual matching of the first valve sleeve and the movable valve core. The structure that the first valve sleeve and the movable valve core are matched with each other has the advantages of stable performance, difficult damage and easy processing and manufacturing. In addition, because the first valve sleeve controls the hydraulic motor through linear movement in the first valve sleeve, the present embodiment can apply work in a linear direction by rotation of the hydraulic motor, so that the movable valve core moves. The structure can ensure that the power output by the hydraulic motor is transmitted to the movable valve core in equal proportion and accurately to generate corresponding displacement, thereby ensuring that the hydraulic motor can be stopped in time after outputting rated power or finishing rated rotation turns, and further improving the operation precision of the hydraulic motor.

In any of the above technical solutions, one of the feedback assembly and the driving member is slidably or threadedly connected to the movable valve element, and the other is threadedly connected to the movable valve element.

In any of the above technical solutions, the feedback component includes: the second valve sleeve is internally provided with a second valve cavity; the rotary valve core is arranged in the second valve cavity; wherein the rotary valve core rotates in the second valve cavity to drive the on-off valve assembly to disconnect the oil circuit connection of the hydraulic motor.

The second valve sleeve and the rotary valve core which are matched with each other have the advantages of simple structure, small volume, suitability for batch production and the like. In particular, the second valve sleeve and the rotary valve element, which are engaged with each other, can convert the rotation of the hydraulic motor into a linear motion of the rotary valve element in the same direction as the axial direction of the motor output of the hydraulic motor, as compared to other mechanical motion conversion structures such as a crank link or a rack and pinion, thereby ensuring that mechanical energy is stably and efficiently transmitted.

In any of the above technical solutions, the driving part includes: a drive motor; the driving motor connecting sleeve is internally provided with a motor connecting sleeve inner cavity; wherein, break-make valve subassembly and driving motor interconnect in motor adapter sleeve inner chamber.

The design of the drive motor connecting sleeve is convenient for the installation and fixation of the drive motor and the control of the drive component to the movable valve core. The inside motor adapter sleeve inner chamber of driving motor adapter sleeve has formed sufficient airtight space to remove case and driving motor interconnect in the motor adapter sleeve inner chamber, consequently, this embodiment accessible multiple mechanical motion transformation structure realizes removing the connection of case and driving motor, thereby make the selection of the connected mode between removal case and the driving motor more nimble and diversified, and effectively protect driving motor and remove the case, guarantee the leakproofness between the two, get into dust and other impurity in avoiding the hydraulic motor control system.

In any one of the above technical solutions, the hydraulic motor control system includes: and the feedback assembly speed reducer is arranged between the feedback assembly and the hydraulic motor, and the feedback assembly and the hydraulic motor are mutually connected through the feedback assembly speed reducer.

Among this technical scheme, through setting up the feedback subassembly reduction gear, can slow down hydraulic motor, and then improve the accurate degree of feedback subassembly reduction gear when measuring the number of revolutions of motor output shaft, improve the accurate degree of control of hydraulic motor when the drive on-off valve subassembly is closed from this.

In any of the above technical solutions, the on-off valve assembly and the driving part and/or the on-off valve assembly and the feedback assembly are connected to each other through a ball screw structure.

The ball screw structure can ensure that stable and effective power transmission is realized between the on-off valve assembly and the driving part and/or between the on-off valve assembly and the feedback assembly.

To achieve the second object of the present invention, embodiments of the present invention provide a machine including a hydraulic motor control system according to any one of the embodiments of the present invention. The mechanical equipment can be vehicles such as a dump truck, a mixer truck, a pump truck and a car, can also be construction machinery such as a road roller, a paver, a milling machine, a grader, an excavator and a front-face lifting device, and can also be fixed equipment such as a machine tool and the like. Since the mechanical equipment includes the hydraulic motor control system according to any embodiment of the present invention, the mechanical equipment has all the advantages of the hydraulic motor control system according to any embodiment of the present invention, and details are not described herein again.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic cross-sectional view of a hydraulic motor control system according to some embodiments of the present invention;

FIG. 2 is an enlarged partial view of a hydraulic motor control system according to some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 2 is:

10: hydraulic motor, 20: on-off valve assembly, 22: first valve housing, 24: first valve chamber, 26: moving spool, 30: drive means, 32: drive motor, 34: drive motor adapter sleeve, 40: feedback component, 42: second valve housing, 44: second valve chamber, 46: rotary valve element, 50: feedback assembly decelerator, 60: speed reducer, 61: planetary gear assembly, 70: a housing, 71: a stationary housing; 72: movable housing, 73: bearing, 201: working port, 262: drive member connection portion, 264: feedback assembly connection, 322: drive motor output shaft, 342: motor adapter sleeve inner chamber, 462: on-off valve assembly connection, 464: motor output shaft connecting portion, P: pressure oil path, T: oil return path, a: a first oil inlet and outlet, B: and the second oil inlet and outlet.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The technical solutions of some embodiments of the present invention are described below with reference to the accompanying drawings.

As shown in fig. 1, an embodiment of the present invention provides a hydraulic motor control system. The hydraulic motor control system includes: hydraulic motor 10, on-off valve assembly 20, drive member 30 and feedback assembly 40.

The on-off valve assembly 20 is used to turn on and off the oil circuit connection of the hydraulic motor 10. The driving member 30 is connected to the on-off valve assembly 20 for controlling the on-off valve assembly 20 to open the oil passage connection of the hydraulic motor 10. The feedback unit is connected to the hydraulic motor 10 and the on-off valve unit 20, respectively, and drives the on-off valve unit 20 to open the oil passage connection of the hydraulic motor 10 until the oil passage connection of the hydraulic motor 10 is disconnected when the hydraulic motor 10 rotates.

Two of the working ports 201 of the on-off valve assembly 20 are respectively connected with two oil inlets and outlets of the hydraulic motor 10, that is, as shown in fig. 1, the two working ports 201 of the on-off valve assembly 20 are respectively connected with a first oil inlet and outlet a and a second oil inlet and outlet B. The on-off valve assembly 20 is used to turn on and off the oil circuit connection of the hydraulic motor 10. The driving member 30 is connected to the on-off valve assembly 20, and controls the on-off valve assembly 20 to conduct the oil path connection of the hydraulic motor. The feedback assembly 40 is connected to the hydraulic motor 10 and the on-off valve assembly 20, respectively, and adjusts the on-off valve assembly 20 to disconnect the oil circuit connection of the hydraulic motor 10.

The working port 201 is opened on a side wall of the on-off valve assembly 20, and has a through hole structure, so that the inner space and the outer space of the on-off valve assembly 20 are communicated with each other. The two working ports 201 are connected to a first oil inlet/outlet a and a second oil inlet/outlet B of the hydraulic motor 10, respectively. The hydraulic oil can flow from the external pressure oil source, enter the hydraulic motor 10 through any one of the working ports 201 and through the first oil inlet/outlet port a, and flow through the hydraulic motor 10, then flow back to any other working port 201 through the second oil inlet/outlet port B, and return to the external pressure oil source.

In addition, the hydraulic oil may also flow from the external pressure oil source, enter the hydraulic motor 10 through any one of the working ports 201 and through the second oil inlet/outlet B, and flow through the hydraulic motor 10, and then flow back to any other working port 201 from the first oil inlet/outlet a and return to the external pressure oil source. That is, the hydraulic oil may flow in the hydraulic motor 10 in a forward direction or a reverse direction. When one of the first oil inlet/outlet A and the second oil inlet/outlet B is an oil outlet, the other is an oil inlet.

The functions of the components and the overall working principle of the hydraulic motor control system provided by the embodiment of the invention are as follows.

The on-off valve assembly 20 functions to turn on or off the oil passage connection of the hydraulic motor 10 by switching between two states. When the on-off valve assembly 20 is in the first state, the oil path connection of the hydraulic motor 10 is turned on, and hydraulic oil can enter the hydraulic motor 10 to drive the hydraulic motor 10 to work. When the on-off valve assembly 20 is in the second state, the oil passage connection of the hydraulic motor 10 is disconnected, hydraulic oil cannot enter the hydraulic motor 10 to drive the hydraulic motor 10, and thus the hydraulic motor 10 stops operating.

The function of the drive member 30 is to drive the on-off valve assembly 20 into the first state so that the on-off valve assembly 20 controls the oil circuit connection of the hydraulic motor 10 to be conducted. The feedback assembly 40 functions to drive the on-off valve assembly 20 into the second state such that the oil circuit connection of the hydraulic motor 10 is disconnected.

It should be noted that when the driving member 30 and the feedback assembly 40 operate simultaneously, the on-off valve assembly 20 maintains the conductive state, i.e., the first state, under the simultaneous action of the driving member 30 and the feedback assembly 40, so that the hydraulic motor 10 performs continuous power output.

Wherein the feedback assembly 40 is connected to the hydraulic motor 10. Specifically, the feedback assembly 40 is connected to the motor output shaft of the hydraulic motor 10. It changes state in synchronization with the rotation of the hydraulic motor 10 and accordingly feeds back the state of the hydraulic motor 10 to the on-off valve assembly 20. Thus, the feedback assembly 40 regulates the on-off valve assembly 20 to accordingly and appropriately disconnect the oil circuit connection of the hydraulic motor 10 according to the operating condition of the hydraulic motor 10.

When the hydraulic motor is required to achieve rated power output or rated number of turns of rotation, the control device of the hydraulic motor in the related art is difficult to achieve the above function, resulting in an unsatisfactory accuracy of the output power of the hydraulic motor.

Therefore, in order to improve the control accuracy of the hydraulic motor and ensure that the hydraulic motor outputs at an arbitrary rated power or rated number of revolutions, the present embodiment controls the opening of the on-off valve assembly 20 using the hydraulic motor 10, so that the on-off valve assembly 20 can be accurately opened in time after the hydraulic motor 10 outputs the rated power, thereby stopping the operation of the hydraulic motor 10. Therefore, the embodiment can accurately control the output precision of the hydraulic motor when outputting rated power, and improve the control precision of the hydraulic motor and the stability and precision of the hydraulic motor when outputting rated power.