阅读说明：本技术 一种闭式同步驱动动力设备及其驱动方法 (Closed type synchronous driving power equipment and driving method thereof ) 是由 郭初生 邵立伟 梅燕民 于 2020-04-03 设计创作，主要内容包括：一种闭式同步驱动动力设备,包括：油箱,包括箱体；油泵,包括泵体、主动齿轮、第一从动齿轮和第二从动齿轮,所述泵体包括第一容腔和第二容腔；所述主动齿轮转动地设于所述泵体内并且分别与所述第一从动齿轮和第二从动齿轮啮合；动力单元,包括第一出油口和第二出油口,在所述动力单元驱动所述主动齿轮转动时,所述主动齿轮同时带动所述第一从动齿轮和第二从动齿轮转动以将油液同步从所述第一出油口和第二出油口泵出。上述的一种闭式同步驱动动力设备及其驱动方法通过动力单元的输出轴带动主动齿轮转动,使得主动齿轮可以同步带动第一从动齿轮和第二从动齿轮转动而分别将油液从第一出油口和第二出油口泵出,从而可以提供多路油液输出。(A closed synchronous drive power plant comprising: the oil tank comprises a tank body; the oil pump comprises a pump body, a driving gear, a first driven gear and a second driven gear, wherein the pump body comprises a first cavity and a second cavity; the driving gear is rotatably arranged in the pump body and is respectively meshed with the first driven gear and the second driven gear; and the power unit comprises a first oil outlet and a second oil outlet, and when the power unit drives the driving gear to rotate, the driving gear simultaneously drives the first driven gear and the second driven gear to rotate so as to pump oil out of the first oil outlet and the second oil outlet synchronously. According to the closed synchronous driving power equipment and the driving method thereof, the output shaft of the power unit drives the driving gear to rotate, so that the driving gear can synchronously drive the first driven gear and the second driven gear to rotate and pump oil out of the first oil outlet and the second oil outlet respectively, and therefore multi-path oil output can be provided.)

1. A closed synchronous drive power plant, comprising:

the oil tank comprises a tank body, and one end of the tank body is open;

the oil pump comprises a pump body, a driving gear, a first driven gear and a second driven gear, wherein the pump body is arranged at the open end of the box body and comprises a first cavity and a second cavity, the first cavity is communicated with the box body, and the first driven gear is rotationally arranged in the first cavity; the second accommodating cavity is communicated with the box body, and the second driven gear is rotatably arranged in the second accommodating cavity; the driving gear is rotatably arranged in the pump body and is respectively meshed with the first driven gear and the second driven gear;

the power unit comprises a first oil outlet and a second oil outlet, an output shaft of the power unit extends into the pump body and is connected with the driving gear, the first oil outlet is communicated with the first cavity, the second oil outlet is communicated with the second cavity, and when the power unit drives the driving gear to rotate, the driving gear simultaneously drives the first driven gear and the second driven gear to rotate so as to pump oil out of the first oil outlet and the second oil outlet synchronously.

2. The closed synchronous drive power equipment according to claim 1, wherein the power unit includes a cover and a machine body, the first oil outlet and the second oil outlet are provided in the cover, the pump is connected to the cover, and the output shaft of the power unit extends from the cover to the pump and is connected to the driving gear.

3. The closed synchronous drive power equipment as recited in claim 2, wherein the power unit further comprises a control box connected to the machine body and forming a closed cavity with the machine body and the cover.

4. The closed synchronous drive power plant of claim 3, wherein the body includes a terminal post extending into the control box, the control box being electrically connected to the body through the terminal post.

5. The closed synchronous drive power plant of claim 4, wherein the open end of the tank is connected to the cover such that the pump body is received in the tank.

6. The closed synchronous drive power equipment as claimed in claim 5, wherein the oil tank further comprises a movable piston, the tank body comprises an air vent, the movable piston is movably arranged in the tank body to divide the tank body into an oil cavity and an air cavity, the first and second cavities are respectively communicated with the oil cavity, and the air cavity is communicated with the outside through the air vent.

7. The closed synchronous drive power plant of claim 6, wherein the moving piston sleeve is provided with a sealing ring.

8. The closed synchronous drive power plant of claim 7, wherein a gear ratio of the drive gear to the first driven gear is equal to a gear ratio of the drive gear to the second driven gear.

9. A driving method of a closed type synchronous drive power plant, characterized by comprising:

an output shaft of the power unit drives the driving gear to rotate;

the driving gear simultaneously drives the first driven gear and the second driven gear to synchronously rotate, so that the first driven gear rotates to suck oil from the oil tank and pump the oil out of the first oil outlet, and the second driven gear rotates to suck oil from the oil tank and pump the oil out of the second oil outlet.

10. The driving method of a closed synchronous drive power plant according to claim 9, further comprising, when the first driven gear and the second driven gear draw oil from the oil tank:

the piston of the oil tank moves in the oil tank under the action of external air pressure, so that the volume of the cavity for storing oil liquid changes along with the volume of the oil liquid.

Technical Field

The invention belongs to the field of hydraulic equipment, and particularly relates to closed synchronous driving power equipment and a driving method thereof.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

When a hydraulic system needs double-cylinder synchronous driving, a flow equalizing valve, a flow equalizing motor, a proportional servo valve or a synchronous cylinder is mostly adopted for realizing the hydraulic system. The synchronous precision of the flow equalizing valve and the flow equalizing motor is about 2-3%; the precision of the servo proportional valve and the synchronous cylinder can reach within 1 percent, and the synchronous cylinder has high price and large volume. Meanwhile, the flow equalizing valve, the flow equalizing motor and the synchronous cylinder have the function of equalizing flow and have no function of regulating speed; the two sets of proportional servo valves are matched to realize synchronous control and speed control, but the proportional servo valves are expensive and need a pump station for matching.

Disclosure of Invention

In view of the above, there is a need for a closed synchronous drive power plant and a driving method thereof, which can provide multiple synchronous flow oil outputs at low cost.

A closed synchronous drive power plant comprising:

the oil tank comprises a tank body, and one end of the tank body is open;

the oil pump comprises a pump body, a driving gear, a first driven gear and a second driven gear, wherein the pump body is arranged at the open end of the box body and comprises a first cavity and a second cavity, the first cavity is communicated with the box body, and the first driven gear is rotationally arranged in the first cavity; the second accommodating cavity is communicated with the box body, and the second driven gear is rotatably arranged in the second accommodating cavity; the driving gear is rotatably arranged in the pump body and is respectively meshed with the first driven gear and the second driven gear;

the power unit comprises a first oil outlet and a second oil outlet, an output shaft of the power unit extends into the pump body and is connected with the driving gear, the first oil outlet is communicated with the first cavity, the second oil outlet is communicated with the second cavity, and when the power unit drives the driving gear to rotate, the driving gear simultaneously drives the first driven gear and the second driven gear to rotate so as to pump oil out of the first oil outlet and the second oil outlet synchronously.

Preferably, the power unit includes a cover and a body, the first oil outlet and the second oil outlet are disposed on the cover, the pump is connected to the cover, and the output shaft of the power unit extends from the cover to the pump and is connected to the driving gear.

Preferably, the power unit further comprises a control box, wherein the control box is connected to the machine body and forms a closed cavity together with the machine body and the cover body.

Preferably, the body includes a terminal extending into the control box, and the control box is electrically connected to the body through the terminal.

Preferably, the open end of the box body is connected to the cover body, so that the pump body is accommodated in the box body.

Preferably, the oil tank further comprises a movable piston, the tank body comprises an air hole, the movable piston is movably arranged in the tank body and divides the tank body into an oil cavity and an air cavity, the first accommodating cavity and the second accommodating cavity are respectively communicated with the oil cavity, and the air cavity is communicated with the outside through the air hole.

Preferably, the mobile piston sleeve is provided with a sealing ring.

Preferably, the transmission ratio of the driving gear to the first driven gear is equal to the transmission ratio of the driving gear to the second driven gear.

A driving method of a closed type synchronous drive power plant, comprising:

an output shaft of the power unit drives the driving gear to rotate;

the driving gear simultaneously drives the first driven gear and the second driven gear to synchronously rotate, so that the first driven gear rotates to suck oil from the oil tank and pump the oil out of the first oil outlet, and the second driven gear rotates to suck oil from the oil tank and pump the oil out of the second oil outlet.

Preferably, when the first driven gear and the second driven gear draw oil from the oil tank, the oil tank further comprises:

the piston of the oil tank moves in the oil tank under the action of external air pressure, so that the volume of the cavity for storing oil liquid changes along with the volume of the oil liquid.

Compared with the prior art, the closed synchronous driving power equipment and the driving method thereof drive the driving gear to rotate through the output shaft of the power unit, so that the driving gear can synchronously drive the first driven gear and the second driven gear to rotate and pump oil out from the first oil outlet and the second oil outlet respectively, and thus, multi-path oil output can be provided. The closed synchronous driving power equipment and the driving method thereof use equipment such as a proportional servo valve and the like, and can effectively reduce the cost of multi-path oil output equipment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a closed type synchronous drive power plant.

FIG. 2 is a schematic sectional view of II-II in FIG. 1.

Fig. 3 is a flowchart of a driving method of the closed type synchronous drive power plant.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, 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 to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In various embodiments of the present invention, for convenience in description and not in limitation, the term "coupled" as used in the specification and claims of the present application is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Fig. 1 is a schematic structural view of a closed type synchronous drive power plant, and fig. 2 is a schematic sectional structural view of II-II in fig. 1. As shown in fig. 1 and 2, the closed synchronous drive power unit includes an oil tank 20, an oil pump, and a power unit 10. The oil tank 20 is used for storing oil, and the power unit 10 is used for driving an oil pump to synchronously output two paths of oil.

The tank 20 includes a tank for storing oil of the hydraulic system. As shown in fig. 2, the oil tank 20 has a substantially cylindrical shape and has a cavity therein for storing oil. In this embodiment, the cavity of the oil tank 20 is open at one end. A movable piston 21 is further arranged in the cavity, and the movable piston 21 is movably arranged in the cavity and can move back and forth along the axial direction of the cavity. The circumferential surface of the movable piston 21 is provided with a sealing ring to divide the cavity into an oil cavity 23 and an air cavity 24, oil is stored in the oil cavity 23, and the side wall of the air cavity 24 is provided with a vent hole 22, so that the air cavity 24 can be communicated with the outside through the vent hole 22. Thus, the piston of the oil tank 20 moves in the oil tank 20 under the action of the external air pressure, so that the volume of the cavity for storing the oil changes along with the volume of the oil. Compared with the existing hydraulic pump station, most of the hydraulic pump station uses the open oil tank 20, the top of the oil tank 20 is provided with a vent hole, the oil suction port of the hydraulic pump is arranged at the lower part of the oil tank 20, and when the pump station continuously outputs oil, the oil level is lowered under the atmospheric depression, so that the pump can be ensured to have good oil absorption capacity. However, the oil tank 20 of the pumping station of the oil tank 20 is required to be installed upwards and cannot move along with the load, otherwise, oil can leak. Moreover, the oil inside directly contacts the atmosphere, and the oil is separated into air and moisture, so that the aging and deterioration of the oil can be accelerated, and the impurities are increased. The closed oil tank 20 provided by the embodiment can isolate oil from air, relieve the aging and deterioration of the oil, and realize the integral integration of the power unit 10 and the actuating mechanism (oil cylinder).

The oil pump includes a pump body 40, a drive gear 41, a first driven gear 42, and a second driven gear 43. The pump body 40 is provided at an open end of the case body so as to seal the oil chamber 23 of the oil tank 20. A first containing cavity 421 and a second containing cavity 431 are arranged in the pump body 40, the first containing cavity 421 is communicated with the oil cavity 23 of the box body, and oil in the oil cavity 23 can flow back and forth between the first containing cavity 421 and the oil cavity 23. Similarly, the second cavity 431 is communicated with the oil chamber 23 of the tank, and oil in the oil chamber 23 can flow back and forth between the second cavity 431 and the oil chamber 23. The drive gear 41 is rotatably provided in the pump body 40, and may be rotatably connected to the pump body 40 by a member such as a bearing. The first driven gear 42 is rotatably disposed in the first chamber 421, and the first driven gear 42 is engaged with the driving gear 41. The second driven gear 43 is rotatably disposed in the second receptacle 431, and the second driven gear 43 is engaged with the driving gear 41. In the present embodiment, the number of teeth, the modulus, and other parameters of the first driven gear 42 and the second driven gear 43 are the same, and therefore, the transmission ratio between the driving gear 41 and the first driven gear 42 is equal to the transmission ratio between the driving gear 41 and the second transmission gear, so that the driving gear 41 can drive the first driven gear 42 and the second driven gear 43 to rotate simultaneously, and the rotation speeds of the first driven gear 42 and the second driven gear 43 are the same. Therefore, the first driven gear 42 and the second driven gear 43 can suck oil from the oil tank 20 and output the oil from the first oil outlet 111 and the second oil outlet at the same flow rate, that is, two paths of oil outputs with the same flow rate can be provided, and a synchronous driving function is realized.

The power unit 10 is used for driving an oil pump to output oil. In this embodiment, the power unit 10 may be a motor, and includes a body 12, a cover 11, and a control box 30, where the body 12 includes a cylindrical housing having two ends penetrating therethrough, and a motor core formed by a wire winding and an output shaft (rotor) penetrating through the motor core are provided inside the housing. The cover 11 and the control box 30 are respectively fastened to two ends of the housing of the machine body 12, and form a closed cavity with the machine body 12, and the motor inner core is disposed in the cavity. The two ends of the output shaft are respectively connected to the cover body 11 and the control box 30 through bearings, and one end of the output shaft extends out of the cover body 11 and is directly connected to the driving gear 41 to drive the driving gear 41 to rotate, so that a coupler is not used, and the axial size of the equipment can be reduced.

Lid 11 lock is at the tip of organism 12 and with oil tank 20 and oil pump connection, and the uncovered of oil pump and oil tank 20 is connected to the side of keeping away from power unit 10 of lid 11 for the oil pump is located the uncovered of oil tank 20 and with lid 11 zonulae occludens, and this kind of integral type design of motor and oil pump can reduce equipment weight and axial dimensions is little, has compact structure's advantage. The cover 11 is provided with a first oil outlet 111, a second oil outlet (not shown in the figure, located on the side opposite to the first oil outlet 111), a first oil return port 112 and a second oil return port (not shown in the figure, located on the side opposite to the first oil return port 112), the first oil outlet 111 is communicated with the first cavity 421, the second oil outlet is communicated with the second cavity 431, and the first oil return port 112 corresponds to the first oil outlet 111 and is used for receiving returned oil output from the first oil outlet 111; the second oil return port corresponds to the second oil outlet and is used for receiving the returned oil output from the second oil outlet. In addition, the inside of the cover 11 also communicates with the oil pump, so that the first oil outlet 111 and the second oil outlet can communicate with the pump body 40.

The control box 30 is connected to an end portion of the casing of the machine body 12 opposite to the cover 11 to serve as a rear cover of the power unit 10, and forms a sealed cavity with the machine body 12 and the cover 11. In this embodiment, a side surface of the control box 30 is provided with a mounting groove corresponding to the body 12 of the motor, the mounting groove corresponds to the body 12 of the motor so that the body 12 can be embedded into the mounting groove to realize a sealing connection with the body 12, and an end portion of the output shaft is rotatably connected to a side surface of the control box 30 through a bearing and extends out of the control box 30 so as to mount the rotation speed detecting device. A control circuit board (not shown) is arranged in the control box 30, and the motor inner core of the machine body 12 is electrically connected with the control circuit board in the control box 30 through a terminal 31 penetrating through the side surface of the control box 30, so that the control circuit board of the control box 30 can control the rotating speed and the rotating direction of the motor. Therefore, the wiring part of the motor cannot be exposed to the outside, so that the condition that a water drainage plug is connected with an external power line and a control signal line is avoided, and the protection grade of the motor is improved.

In the embodiment, as a preferred embodiment, all joints are preferably sealed by using sealing rings, so that the overall protection level is improved, and the power unit 10 can be used by field mobile equipment.

Fig. 3 is a flowchart of a driving method of the closed type synchronous drive power plant. As shown in fig. 3, the driving method of the closed type synchronous drive power plant includes steps S301 to S303.

Step S301: the output shaft of the power unit 10 drives the driving gear 41 to rotate. In the present embodiment, the control box 30 of the power unit 10 controls the rotation of the output shaft of the motor, and adjusts the rotation speed and the rotation direction of the output shaft during the rotation according to the actual situation.

Step S302: the driving gear 41 simultaneously drives the first driven gear 42 and the second driven gear 43 to rotate synchronously, so that the first driven gear 42 rotates to suck the oil from the oil tank 20 and pump the oil out of the first oil outlet 111, and the second driven gear 43 rotates to suck the oil from the oil tank 20 and pump the oil out of the second oil outlet. In addition, in the process of outputting the oil, the control box 30 can also adjust the rotating speed of the motor according to the actual condition, so that the function of controlling the output flow of the oil can be realized.

When the first driven gear 42 and the second driven gear 43 draw oil from the oil tank 20, the oil is pumped out from the first outlet 111 and the second outlet, so that the volume of the oil in the oil tank 20 is reduced. The movable piston 21 of the oil tank 20 moves in the oil tank 20 under the action of the external air pressure, so that the volume of the cavity for storing oil changes along with the volume of the oil. When the oil pump sucks oil to cause the oil to be greatly reduced, the atmosphere can push the movable piston 21 in the oil tank 20 to move towards the motor pump side, the oil in the oil tank 20 is extruded to the oil pump, and the oil pump can be ensured not to be sucked empty all the time.

In the several embodiments provided in the present invention, it should be understood that the disclosed structures and components may be implemented in other ways. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. The terms first, second, etc. are used to denote names, but not any particular order.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.