CN115680983A - Motor - Google Patents

Abstract

Embodiments of the present invention relate to a motor, and according to an embodiment of the present invention, the motor includes: a main body; a first valve provided inside the main body; a second valve disposed in the main body so as to be spaced apart from the first valve; a first flow path opened and closed by the first valve or the second valve, for guiding movement of a fluid; a second flow path which is arranged in the main body so as to be separated from the first flow path, is opened and closed by the first valve or the second valve, and guides the movement of the fluid; a check valve disposed in the main body so as to be spaced apart from the second valve, and operated by a fluid moving through the first flow path or the second flow path; and an input flow path that is disposed between the first valve and the second valve and into which fluid for moving the first valve and the second valve flows.

Description

Motor

Technical Field

Embodiments of the present invention relate to a motor, and more particularly, to a motor for rotating a rotating body of construction machinery.

Background

Generally, a motor drives a device provided with the motor by supplying power. Specifically, the hydraulic motor may receive the working oil and drive the device according to the pressure thereof.

When such a hydraulic motor is provided in construction machinery, power is supplied so that the swing body swings from the body. When the control for stopping the rotation of the upper body is performed, the hydraulic motor blocks the supply of the working oil through the left rotation port or the right rotation port, and the upper body continues to rotate by the inertial force in a state where the supply of the working oil to the left rotation connection port and the right rotation connection port of the hydraulic motor connected thereto is blocked.

As a result, the brake pressure that resists in the direction opposite to the one-side connection port due to the continuous turning of the upper body by the inertia of the upper body is accumulated in the hydraulic motor, and the turning of the upper body is finally stopped by the self weight of the upper body.

In this case, the pressure formed inside the hydraulic motor is lower than the relief pressure, and the hydraulic oil cannot escape, so that the high pressure on the side where the braking action is performed is lowered, the pressure on the opposite side of the low pressure state is raised, and the reverse rotation phenomenon occurs again by the high pressure accumulated again.

To prevent such a reverse rotation phenomenon, a check valve is disposed in the hydraulic motor to prevent the accumulation of pressure by communicating the flow paths on both sides.

However, in the case of such a conventional hydraulic motor, a structure is proposed in which fluid is supplied to the check valve even if the operating state of the motor is changed, thereby reducing the starting force at the initial operation of the motor.

Further, the check valve has a low degree of freedom in design change of the flow passage area, and thus it is difficult to reduce the impact.

Documents of the prior art

Patent document

Patent document 1: korean laid-open patent publication No. 10-2018-0071693

Disclosure of Invention

An embodiment of the invention provides a motor capable of improving starting force during the initial operation of the rotary body in the rotary work.

According to an embodiment of the present invention, a motor includes: a main body; a first valve provided inside the main body; a second valve disposed in the main body so as to be spaced apart from the first valve; a first flow path opened and closed by the first valve or the second valve, for guiding movement of a fluid; a second flow path which is arranged in the main body so as to be separated from the first flow path, is opened and closed by the first valve or the second valve, and guides the movement of the fluid; a check valve disposed in the main body so as to be spaced apart from the second valve, and operated by a fluid moving through the first flow path or the second flow path; and an input flow path that is disposed between the first valve and the second valve and into which fluid for moving the first valve and the second valve flows.

The first valve or the second valve may block the first flow path and the second flow path when a pressure of a fluid equal to or higher than a set reference is input to the input flow path.

When the first flow path and the second flow path are blocked, the first valve or the second valve may block the supply of the fluid to the check valve.

The pressure of the fluid equal to or higher than the set reference may be input to the input flow path as a signal input in the swivel operation mode.

When a pressure of a fluid smaller than a set reference is input to the input flow path, the first valve or the second valve may communicate the first flow path, the check valve, and the second flow path with each other.

The pressure of the fluid smaller than the set reference may be input to the input flow path as a signal input in the whirling stop mode.

Alternatively, the main body may include: a first body provided with the first valve and the second valve; and a second body connected to the first body and provided with the check valve.

The first and second flow paths may be formed across the first and second bodies.

Alternatively, the present invention provides a motor provided in a construction machine facility for providing power for rotating a rotating body, the construction machine facility including a main body and a rotating body, the rotating body being provided in the main body and being rotatable, the motor including: an anti-reverse valve; a valve unit disposed apart from the check valve; an input channel for inputting the fluid operated by the valve section in response to a swing operation signal of the swing body; a first channel opened and closed by the valve unit, for guiding movement of a fluid to the check valve; and a second channel which is disposed apart from the first channel, is opened and closed by the valve unit, and guides the movement of the fluid to the check valve.

When the rotary body is in a rotary operation mode, the fluid for operating the valve section can flow into the input flow path, and the fluid flowing into the check valve through the first flow path and the second flow path is blocked.

Alternatively, the present invention provides a motor provided in a construction machine facility for providing power for rotating a rotating body, the construction machine facility including a main body and a rotating body, the rotating body being provided in the main body and being rotatable, the motor including: an anti-reverse valve; a valve unit disposed apart from the check valve; an input flow path through which a fluid for operating the valve section is input in response to a brake pressure signal; a first channel opened and closed by the valve unit, for guiding movement of a fluid to the check valve; and a second channel which is disposed apart from the first channel, is opened and closed by the valve unit, and guides the movement of the fluid to the check valve.

According to the embodiment of the invention, when the rotary body rotates in the initial stage of the rotary work, the motor can effectively improve the starting force.

Drawings

Fig. 1 shows a construction machine provided with a motor according to an embodiment of the present invention.

Fig. 2 shows a circuit diagram of the motor of the present invention.

Fig. 3 shows a partial cross-sectional view of the motor of the present invention.

Fig. 4 and 5 show the motor when the swivel body is in the swivel mode.

Fig. 6 and 7 show the motor when the revolution body stops revolving or performs reverse rotation.

Fig. 8 shows a partial sectional view of a motor according to another embodiment of the present invention.

Fig. 9 and 10 show the pressure in the operating state of the motor according to the embodiment of the present invention.

Description of reference numerals

100: a main body; 110: a first body;

111. 112, 112: a motor; 120: a second body;

200: a valve section; 210: a first valve;

220: a second valve; 300: an anti-reverse valve;

410: a first flow path; 420: a second flow path;

500: an input flow path; 10: engineering machinery equipment;

20: a body; 30: a revolution body.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the present invention. The invention can be implemented in a number of different embodiments and is not limited to the embodiments described herein.

The drawings are of a schematic illustration and are not to scale. Relative dimensions and proportions of parts of the figures have been shown exaggerated or reduced in size, relative to their size, for the sake of clarity and convenience in the drawings, and any dimensions are exemplary only and not intended to be limiting. Moreover, to illustrate similar features, the same reference numerals are used for identical structures, elements, or components that appear in more than two figures.

The embodiments of the present invention specifically show desirable embodiments of the present invention. As a result, various modifications can be expected. Thus, embodiments are not limited to the particular forms of regions illustrated, including, for example, manufacturing-based morphological variations.

Hereinafter, the motor 111 according to an embodiment of the present invention will be described with reference to fig. 1 to 7.

The motor 111 operates by the supplied fluid and provides power to the device in which the motor 111 is provided. Specifically, as shown in fig. 1, the motor 111 is provided in the construction machine 10 to provide power for rotating the revolving unit 30 about the main body 20, the construction machine 10 includes the main body 20 and the revolving unit 30, and the revolving unit 30 is provided in the main body 20. That is, the motor 111 according to an embodiment of the present invention may be a swing motor that is provided in the construction machine 10 and supplies power for swinging the swing body 30 as a hydraulic motor.

As shown in fig. 2 and 3, the motor 111 according to an embodiment of the present invention includes a body 100, a first valve 210, a second valve 220, a first flow path 410, a second flow path 420, a check valve 300, and an input flow path 500.

The body 100 is provided with a first valve 210. Specifically, the first valve 210 may be disposed within the first chamber 101 formed in the body 100 to be movable along the inside of the first chamber 101.

The second valve 220 is disposed in the main body 100 to be spaced apart from the first valve 210. Specifically, the second valve 220 may be disposed in the second chamber 102 formed in the body 100 to be separated from the first chamber 101, and the second valve 220 may be moved along the inside of the second chamber 102.

The valve portion 200 may include a first valve 210 and a second valve 220.

The first flow path 410 has a hollow interior to guide the movement of fluid. The first flow path 410 can be opened and closed by the first valve 210 or the second valve 220.

The second flow path 420 has a hollow interior to guide the movement of the fluid. The second flow path 420 can be opened and closed by the first valve 210 or the second valve 220. The second channel 420 may be disposed to be spaced apart from the first channel 410.

The check valve 300 may be disposed in the body 100 to be spaced apart from the first valve 210 and the second valve 220. Also, the check valve 300 may be operated by the fluid moving through the first flow path 410 or the second flow path 420. Specifically, the check valve 300 can include a pair of valves 310, 320, which can form the first check chamber 103 and the second check chamber 104 in the body 100. The first check valve 310 may be disposed in the first check chamber 103 and the second check valve 320 may be disposed in the second check chamber 104. Also, the first and second check valves 310 and 320 may form an inner flow path 301 therein, so that the first and second check chambers 103 and 104 may communicate with each other.

Specifically, the first flow path 410 may communicate the first chamber 101, the second chamber 102, and the first check chamber 103. The second flow path 420 may communicate the first chamber 101, the second chamber 102, and the second check chamber 104.

The input flow path 500 is disposed between the first valve 210 and the second valve 220. The input flow path 500 moves the first valve 210 and the second valve 220 according to the pressure of the input fluid. That is, the first and second flow paths 410 and 420 can be selectively opened and closed by the movement of the first and second valves 210 and 220 according to the pressure of the input fluid.

Specifically, the input flow path 500 may include an input portion 510 and a branch portion 520. The input unit 510 may be an inlet port for introducing a fluid into the input channel 500. The branching portion 520 is a flow path that can branch the fluid flowing into the input portion 510 so as to supply the fluid to the first valve 210 and the second valve 220.

Accordingly, one side of the branch part 520 may communicate with the first chamber 101, and the other side of the branch part 520 may communicate with the second chamber 102.

Thus, in the motor 111 according to an embodiment of the present invention, the first and second flow paths 410 and 420 for supplying the fluid to the check valve 300 can be opened and closed by the first and second valves 210 and 220, and thus, when the check valve 300 is not required to be operated, the first and second flow paths 410 and 420 can be blocked, thereby effectively increasing the starting force of the motor 111.

As shown in fig. 4 and 5, in the motor 111 according to the embodiment of the present invention, when the pressure of the fluid equal to or higher than the set reference is input to the input flow path 500, the first flow path 410 and the second flow path 420 may be blocked.

When the pressure of the fluid equal to or higher than the set reference is input through the input portion 510, the pressure may be transmitted to the first valve 210 and the second valve 220 through the branch portion 520. Accordingly, the pressure of the fluid above the set reference provided by the input 510 may provide power to move the first and second valves 210 and 220 along the respective first and second chambers 101 and 102.

This blocks the first and second flow paths 410 and 420, and thus the movement of the fluid supplied to the check valve 300 may be blocked. In this case, the first and second flow paths 410 and 420 may be blocked from each other.

Specifically, when the pressure of the fluid equal to or higher than the set reference is input through the input unit 510, the pressure may be a hydraulic signal pressure input in a swing operation mode for swinging the swing body 30. That is, when the hydraulic signal pressure for performing the swing operation of the swing body 30 is input, the first flow path 410 and the second flow path 420 may be blocked from each other according to the inflow pressure of the fluid supplied through the input flow path 500. Thus, in the first flow path 410 and the second flow path 420, the communication between the first check chamber 103 and the second check chamber 104 can be blocked by the first valve 210 and the second valve 220.

Therefore, when in the swivel operation mode for swiveling of the swivel body 30, the fluid flowing through the first flow path 410 or the second flow path 420 does not flow through the check valve 300, so that the starting force of the motor 111 can be increased.

That is, when the rotary body 30 performs the rotary operation, the fluid is supplied to the check valve 300 through the first flow path 410 or the second flow path 420, and the hydraulic pressure as the fluid is prevented from moving along with the supply of the fluid, so that the starting force of the motor 111 can be increased.

As shown in fig. 6 and 7, when the pressure of the fluid smaller than the set reference is input to the input flow path 500, the motor 111 according to the embodiment of the present invention can communicate the first flow path 410, the second flow path 420, and the check valve 300.

When a pressure of the fluid smaller than the set reference is input to the input flow path 500, the fluid is input along the first flow path 410, and the fluid thus input flows into the first check chamber 103. The first check valve 310 in the first check chamber 103 moves, and the fluid is transmitted to the second check valve 320 and the second check chamber 104 through the internal flow path 301. Also, the fluid of the second check chamber 104 moves through the second flow path 420.

Accordingly, the first flow passage 410, the check valve 300, and the second flow passage 420 communicate with each other, and thus, when the motor 111 does not rotate the rotating body 30, it is possible to prevent the motor 111 from rotating the rotating body 30 by inertia. That is, when the pressures of the first flow path 410 and the second flow path 420 are the same, the first flow path 410, the second flow path 420, and the check valve 300 are communicated with each other, so that even if the turning operation of the input turning body 30 is stopped, the turning body 30 can be prevented from continuing to turn by the inertia of the motor 111.

Further, since the first flow path 410, the check valve 300, and the second flow path 420 are communicated with each other, when the motor 111 stops the swing operation of the swing body 30, it is possible to prevent a reverse rotation phenomenon in which a high pressure acting as a brake is generated to generate a torque for rotating the motor 111 in a reverse direction because the residual hydraulic oil formed inside is not discharged.

The fluid can be transferred to the check valve 300 with reference to one of the first flow path 410 and the second flow path 420, and the reference of such supply can be changed according to the turning direction of the motor 111.

That is, in addition to the case where the motor 111 moves and stops the rotary body 30 in one direction, when the motor 111 moves and stops the rotary body 30 in the other direction, the fluid may flow into the check valve 300 through the second flow path 420.

Specifically, when the pressure of the fluid smaller than the set reference is input through the input unit 510, the pressure may be a hydraulic signal pressure input in a swing stop mode (when the swing stop signal and the motor are reversed) in which the swing operation mode for swinging the swing body 30 is stopped. That is, when the hydraulic signal pressure for stopping the rotation operation of the rotating body 30 is input, the first flow path 410, the check valve 300, and the second flow path 420 can communicate with each other according to the inflow pressure of the fluid supplied through the input flow path 500.

Therefore, when the rotation of the rotating body 30 is stopped, the first flow path 410 and the second flow path 420 have the same pressure, and the first flow path 410, the check valve 300, and the second flow path 420 can communicate with each other. Therefore, the first and second flow passages 410 and 420 and the check valve 300 are communicated with each other, and the reverse rotation phenomenon and the re-reverse rotation phenomenon in which the motor 111 rotates in the opposite direction to the rotation direction can be effectively prevented. That is, the first flow path 410, the check valve 300, and the second flow path 420 can communicate with each other, and thus the motor 111 can be prevented from rotating in the opposite direction due to a reverse rotation phenomenon.

Further, the first flow path 410, the check valve 300, and the second flow path 420 communicate with each other, so that the shock caused when the motor 111 rotates in the reverse direction can be reduced.

For example, the pressure input through the input portion 510 may be a brake pressure signal. That is, the brake pressure signal can be received from an operation portion of a handle, not shown, and transmitted to the input portion 510.

Accordingly, the motor 111 according to an embodiment of the present invention may be selectively operated according to the swing mode using the brake pressure signal without an additional signal for operating the first and second valves 210 and 220 or an additional valve device.

Further, when the check valve 300 and the first and second flow passages 410 and 420 communicate with each other, a sufficient flow passage area can be secured, and the check function as the function of the check valve 300 can be improved. Specifically, the flow path area of the check valve 300 can be secured to a large extent, so that the impact due to the reverse rotation phenomenon can be reduced.

As shown in fig. 8, the body 100 of the motor 112 according to another embodiment of the present invention may further include a first body 110 and a second body 120.

A first valve 210 and a second valve 220 may be provided at the first body 110. Specifically, a first chamber 101 provided with a first valve 210 may be formed at the first body 110, and a second chamber 102 provided with a second valve 220 may be formed separately from the first chamber 101.

The second body 120 may be connected with the first body 110. An anti-reverse valve 300 may be provided at the second body 120. Specifically, a first check chamber 103 and a second check chamber 104 may be formed at the second body 120. Also, a first check valve 310 may be provided in the first check chamber 103, and a second check valve 320 may be provided in the second check chamber 104.

That is, the inflow of the fluid flowing into the check valve 300 can be selectively controlled by additionally providing the first body 110 in the region where the second body 120 of the conventional check valve 300 is provided.

In other words, the first body 110 may be additionally provided to a structure in which only the second body 120 is provided, as needed, to effectively increase the starting force of the motor 111.

Also, the first and second flow paths 410 and 420 of the motor 112 according to another embodiment of the present invention may be formed across the first and second bodies 110 and 120.

One end of the first flow path 410 may be formed at the first body 110, and the other end may communicate with the first anti-reverse chamber 103 of the second body 120.

One end of the second flow path 420 may be formed at the first body 110, and the other end may communicate with the second anti-reverse chamber 104 of the second body 120.

Referring to fig. 9 and 10, a graph showing a change in pressure of the motor 111 according to an embodiment of the present invention over time will be described.

Fig. 9 shows that the motor 111 starts the swing operation in the section a. In this case, the pressure of the fluid, which is a brake pressure signal equal to or higher than a predetermined pressure, flows into the input flow path 500.

In fig. 9, the Inlet Pressure (Inlet Pressure) represents the fluid Pressure of the first flow path 410. The Outlet Pressure (Outlet Pressure) represents the fluid Pressure of the second flow path 420. SH Pressure (SH Pressure) represents the Pressure of the fluid input to the flow path 500. Speed (Speed) represents the Speed of the motor 111.

Thus, the first valve 210 and the second valve 220 block the first flow path 410 and the second flow path 420 and block the inflow of the fluid into the check valve 300 through the first flow path 410 and the second flow path 420.

Therefore, as shown in fig. 9, the first and second flow paths 410 and 420 do not communicate, thereby exhibiting different pressure states.

Also, the rotation speed of the motor 111 may increase the initial reaction speed according to the operation to reduce the start-up loss, so that the reaction force may be increased. That is, as the motor 111 starts the swing operation, the start loss of the motor 111 can be effectively reduced.

Fig. 9 shows that the swing operation of the motor 111 is stopped in the B interval. In this case, the pressure of the fluid, which is a brake pressure signal smaller than the predetermined pressure, flows into the input flow path 500.

Thereby, the first valve 210 and the second valve 220 open the blocked first flow path 410 and the second flow path 420. And, the fluid flowing through the first flow path 410 operates the check valve 300 and moves through the second flow path 420. The check valve 300 is moved by the inputted fluid.

Therefore, as shown in fig. 9, the first flow path 410, the second flow path 420, and the check valve 300 communicate with each other, and the first flow path 410 and the second flow path 420 are in the same pressure state.

Fig. 9 shows a reverse rotation phenomenon of the motor 111 in the section C. In this case, as in the case of the above-described rotation stop of the motor 111, the pressure of the fluid, which is the brake pressure signal smaller than the predetermined pressure, flows into the input flow path 500.

Specifically, the pressure of the second flow path 420 is greater than the pressure of the first flow path 410, and the pressure of the first flow path 410 is also greater than the pressure of the second flow path 420, so that the reverse rotation phenomenon of the motor 111 occurs.

In this case, the first flow path 410, the second flow path 420, and the check valve 300 are communicated with each other, so that the pressure of the first flow path 410 and the pressure of the second flow path 420 are the same as the movement direction of the check valve 300 is changed, thereby preventing the movement due to the reverse rotation phenomenon of the motor 111.

That is, the check valve 300 can communicate the first and second flow paths 410 and 420 with each other to prevent movement of the motor 111 due to inertia due to the same fluid pressure. That is, when the pressures of the fluids of the first and second flow paths 410 and 420 are the same, the check valve 300 prevents the movement of the motor 111 by communicating them with each other.

As shown in fig. 10, the motor 111 according to the embodiment of the present invention can communicate the first flow path 410, the second flow path 420, and the check valve 300 when the motor rotates in reverse as compared to the conventional motor, and thus can effectively reduce the impact applied to the motor 111 and the valves provided therein. In this case, in fig. 10, the inlet pressure (Before (beform)) represents the fluid pressure of the first flow path of the conventional motor. The outlet pressure (before) represents the fluid pressure of the second flow path 420 of the existing motor. The inlet pressure represents the fluid pressure of the first flow path 410 of the motor 111 according to an embodiment of the present invention. The outlet pressure of the motor 111 in one embodiment of the present invention represents the fluid pressure of the second fluid passage 420.

Although the embodiments of the present invention have been described with reference to the drawings, it will be understood by those skilled in the art to which the present invention pertains that the present invention may be implemented in other specific embodiments without changing the technical spirit or essential features of the present invention.

Therefore, it should be understood that the above-described examples are merely illustrative in all aspects and are not limitative of the present invention, and the scope of the present invention is to be interpreted not by the above detailed description but by the meaning and range of the claims and all modifications and variations derived from the equivalent concept are included in the scope of the present invention.

Claims (11)

1. A motor, comprising:

a main body;

a first valve provided inside the main body;

a second valve disposed in the main body so as to be spaced apart from the first valve;

a first flow path opened and closed by the first valve or the second valve, for guiding movement of a fluid;

a second flow path which is arranged in the main body so as to be separated from the first flow path, is opened and closed by the first valve or the second valve, and guides the movement of the fluid;

a check valve disposed in the main body so as to be spaced apart from the second valve, and operated by a fluid moving through the first flow path or the second flow path; and

and an input flow path that is disposed between the first valve and the second valve and into which a fluid for moving the first valve and the second valve flows.

2. The motor according to claim 1, wherein the first valve or the second valve blocks the first flow path and the second flow path when a pressure of a fluid equal to or higher than a set reference is input to the input flow path.

3. The motor according to claim 2, wherein the first valve or the second valve blocks supply of the fluid to the check valve when the first flow path and the second flow path are blocked.

4. The motor according to claim 2, wherein the input of the pressure of the fluid equal to or higher than a predetermined reference to the input flow path is a signal input in a whirling operation mode.

5. The motor according to claim 1, wherein the first valve or the second valve interconnects the first flow path, the check valve, and the second flow path when a pressure of a fluid smaller than a set reference is input to the input flow path.

6. The motor according to claim 5, wherein the input of the pressure of the fluid smaller than the set reference to the input flow path is a signal input in a whirling stop mode.

7. The motor of claim 1, wherein said body comprises:

a first body provided with the first valve and the second valve; and

and a second body connected to the first body and provided with the check valve.

8. The motor according to claim 7, wherein the first flow path and the second flow path are formed across the first body and the second body.

9. A motor provided in a construction machine that provides power for rotating a rotating body, the construction machine including a main body and the rotating body, the rotating body being provided in the main body and being capable of rotating, the motor comprising:

an anti-reverse valve;

a valve unit disposed apart from the check valve;

an input channel for inputting the fluid for operating the valve section in response to a rotation operation signal of the rotator;

a first channel opened and closed by the valve unit for guiding the movement of the fluid to the check valve; and

and a second flow path which is disposed apart from the first flow path, and which is opened and closed by the valve unit to guide the movement of the fluid to the check valve.

10. The motor according to claim 9, wherein when the rotary body is in a rotary operation mode, the fluid for operating the valve portion flows into the input flow path, and the fluid flowing into the check valve through the first flow path and the second flow path is blocked.

11. A motor provided in construction machinery equipment for providing power for rotating a rotating body, the construction machinery equipment comprising a main body and the rotating body, the rotating body being provided in the main body and capable of rotating, the motor comprising:

an anti-reverse valve;

a valve unit disposed apart from the check valve;

an input flow path through which a fluid for operating the valve section is input in response to a brake pressure signal;

a first channel opened and closed by the valve unit, for guiding movement of a fluid to the check valve; and

and a second flow path which is disposed apart from the first flow path, and which is opened and closed by the valve unit to guide the movement of the fluid to the check valve.

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