CN111720307A

CN111720307A - Oil pump slide block control mechanism driven by motor and gear

Info

Publication number: CN111720307A
Application number: CN202010691940.5A
Authority: CN
Inventors: 刘伟丰; 许仲秋; 刘光明; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2020-09-29

Abstract

The oil pump sliding block control mechanism driven by a motor and a gear relates to the technical field of oil pumps and comprises a sliding block which is arranged in an oil cavity of a pump body and can swing, wherein one side of the sliding block is fixedly connected with a sliding block arm, the outside of the oil cavity is provided with the motor, the motor is in transmission connection with the gear, the gear is positioned in the oil cavity, one end of the sliding block arm is provided with a rack which is meshed with the gear, and the motor can drive the gear to rotate forwards or backwards to move the rack so as to drive the sliding block to swing to change the displacement. The invention utilizes the motor to drive the sliding block to swing, thereby quickening the control of the reaction time, reducing the design difficulty and simplifying the sealing structure.

Description

Oil pump slide block control mechanism driven by motor and gear

Technical Field

The invention relates to the technical field of oil pumps, in particular to an oil pump slide block control mechanism driven by a motor and a gear.

Background

With the increasing development of the energy-saving and emission-reducing technology of automobiles, the variable-displacement oil pump is widely applied to the lubricating system of the internal combustion engine. In a traditional variable displacement oil pump, a movable slide block is generally arranged in an oil cavity, and feedback oil enters the feedback oil cavity to push the slide block to swing so as to change the eccentric quantity of the slide block and a rotor, so that the displacement of the pump is changed. The slider control method has the disadvantages that various feedback oil passages, safety valves, pilot valves and other structures need to be designed, the complexity is relatively high, and a spring needs to be arranged on one side of the slider to abut against the slider, so that the calculation of the corresponding elastic coefficient specification required by the slider is troublesome, long reaction time is needed for the feedback oil to enter a feedback oil cavity and push the slider to swing, and a complex sealing structure needs to be designed for preventing the oil in the feedback oil cavity from entering a rotor cavity.

Disclosure of Invention

The invention aims to provide an oil pump sliding block control mechanism driven by a motor and a gear, which utilizes the motor to drive a sliding block to swing so as to accelerate control reaction time, reduce design difficulty and simplify a sealing structure.

In order to solve the technical problems, the invention adopts the following technical scheme: a motor and gear driven oil pump slide block control mechanism comprises a slide block which is arranged in an oil cavity of a pump body and can swing, a slide block arm is fixedly connected to one side of the slide block, a motor is arranged outside the oil cavity, the motor is in transmission connection with a gear, the gear is located in the oil cavity, a rack which is meshed with the gear is arranged at one end of the slide block arm, the motor can drive the gear to rotate forwards or backwards to enable the rack to move, and therefore the slide block arm drives the slide block to swing to achieve displacement change.

Preferably, the rack is an arc-shaped rack body protruding outwards along the length direction of the rack, and the rack is integrally formed at one end of the slider arm.

More preferably, the teeth of the gear are distributed on the outer circumferential surface of the gear in a semi-annular shape.

More preferably, one end of the output shaft of the motor extends into the oil cavity along the axial direction of the sliding block, and the gear is coaxially and fixedly mounted on the output shaft of the motor.

More preferably, the motor can be connected with an engine ECU or a control chip capable of controlling the operation of the motor is arranged inside the motor.

More preferably, the slider is connected with the oil chamber through a rotating pin.

More preferably, a groove is formed in the inner wall of the oil cavity, an arc-shaped protrusion matched with the groove is correspondingly arranged on the side wall of the slider, and the rotating pin penetrates through the arc-shaped protrusion along the axial direction of the slider and is connected to the bottom of the oil cavity.

The invention has the beneficial effects that: compared with the traditional sliding block control mechanism, the variable displacement oil pump applying the control mechanism does not need to design complicated structures such as a feedback oil duct, a safety valve, a pilot valve and the like, so that the design difficulty is reduced; meanwhile, a feedback oil cavity is not required to be arranged, so that the sealing structure is effectively simplified; in addition, the mode of directly driving the sliding block to swing by the motor and the gear can obviously accelerate the control of the reaction time.

Drawings

Fig. 1 is a schematic overall structure diagram in the embodiment of the present invention.

The reference signs are:

1-slide block 2-slide block arm 3-motor

4-gear 5-rack 6-rotary pin

7-arc bulge.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

As shown in figure 1, the oil pump slide block control mechanism driven by a motor and a gear comprises a slide block 1 which is arranged in an oil cavity of a pump body and can swing, wherein one side of the slide block 1 is fixedly connected with a slide block arm 2, a motor 3 is arranged outside the oil cavity, the motor 3 is in transmission connection with a gear 4, the gear 4 is positioned in the oil cavity, one end of the slide block arm 2 is provided with a rack 5 which is meshed with the gear 4, the motor 3 can drive the gear 4 to rotate forwards or backwards to move the rack 5, and therefore the slide block arm 2 drives the slide block 1 to swing to change the displacement.

The working principle of the oil pump slide block control mechanism driven by the motor and the gear provided by the embodiment is as follows: the gear 4 is driven by the motor 3 to rotate forwards or backwards, so that the rack 5 can be driven to move, and the slider arm 2 drives the slider 1 to swing to change the displacement.

Preferably, the motor 3 may be connected to an engine ECU, so as to directly control the rotation of the gear 4 by using the engine ECU, and in the practical application process, a person skilled in the art should know that a sensor for detecting the pressure of the oil may be arranged in an external oil passage connected to the oil pump, and when the pressure of the oil reaches a certain preset value, the sensor may send a signal to the engine ECU, and the engine ECU may control the operation of the motor 3 accordingly; or a control chip capable of controlling the operation of the motor 3 can be separately arranged in the motor 3, so that the signal of the sensor can be directly sent to the control chip in the motor 3, and then the operation of the motor 3 is controlled by the control chip.

It should be noted that the control program required by the engine ECU to control the operation of the motor 3 or the separate control chip to control the operation of the motor 3 is very simple and easy to obtain for those skilled in the art, because such control programs are already common in the application of the art (i.e. the controller controls the motor to rotate forward or backward or rotate by a preset angle), and can be implemented without any creative labor, and therefore, the description is omitted.

Preferably, the rack 5 is an arc-shaped rack body protruding outwards along the length direction, that is, the rack 5 in this embodiment actually corresponds to a part of the structure of another gear engaged with the gear 4, so that the rack 5 can maintain a good degree of engagement with the gear 4 during the whole swing process of the slider arm 2, and in addition, the rack 5 can be integrally formed at one end of the slider arm 2.

More preferably, the teeth of the gear 4 are distributed on the outer circumferential surface of the gear 4 along a semi-ring shape, and since the slider arm 2 only needs to drive the slider 1 to swing within a certain angle range, accordingly, the gear 4 does not need to rotate within a large angle range, so that the gear 4 does not need to be provided with teeth on the whole outer circumferential surface, and the teeth distributed on the outer circumferential surface of the gear 4 in a semi-ring shape are provided, so that the whole occupied space of the gear 4 can be saved to a certain extent.

More preferably, one end of the output shaft of the motor 3 extends into the oil cavity along the axial direction of the slider 1, and the gear 4 is coaxially and fixedly mounted on the output shaft of the motor 3, the transmission connection mode is direct, and the transmission effect is firm, of course, in order to adapt to spaces of oil pumps or engines with different structures, the mounting direction of the motor 3 (i.e. the axial direction of the output shaft of the motor 3) is not limited thereto, and only a feasible transmission connection structure is required to be provided between the output shaft of the motor 3 and the gear 4, and of course, the gear 4 is correspondingly ensured to be stably mounted in the oil cavity and to be driven to rotate smoothly.

In addition, in the embodiment, the slider 1 is connected with the oil chamber through the rotating pin 6, specifically, a groove is arranged on the inner wall of the oil chamber, an arc-shaped protrusion 7 matching with the groove is correspondingly arranged on the side wall of the slider 1, the rotating pin 6 passes through the arc-shaped protrusion 7 along the axial direction of the slider 1 and is connected to the bottom of the oil chamber, and when the motor 3 drives the slider arm 2 to move, the slider 1 can swing in the oil chamber by taking the axis of the rotating pin 6 as a rotating center.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.

Claims

1. Adopt motor and gear drive's oil pump slider control mechanism, including being arranged in the oil pocket of the pump body and wobbling slider (1), one side fixedly connected with slider arm (2) of slider (1), its characterized in that: the oil cavity is externally provided with a motor (3), the motor (3) is in transmission connection with a gear (4), the gear (4) is located in the oil cavity, one end of the slider arm (2) is provided with a rack (5) meshed with the gear (4), and the motor (3) can drive the gear (4) to rotate positively or negatively to enable the rack (5) to move, so that the slider arm (2) drives the slider (1) to swing to change the displacement.

2. The oil pump slide block control mechanism driven by the motor and the gear according to claim 1, characterized in that: the rack (5) is an arc-shaped rack body protruding outwards along the length direction of the rack, and the rack (5) is integrally formed at one end of the sliding block arm (2).

3. The oil pump slide block control mechanism driven by the motor and the gear according to claim 1, characterized in that: the gear teeth of the gear (4) are distributed on the outer peripheral surface of the gear (4) along a semi-ring shape.

4. The oil pump slide block control mechanism driven by the motor and the gear according to claim 1, characterized in that: one end of an output shaft of the motor (3) extends into the oil cavity along the axial direction of the sliding block (1), and the gear (4) is coaxially and fixedly installed on the output shaft of the motor (3).

5. The oil pump slide block control mechanism driven by the motor and the gear according to claim 1, characterized in that: the motor (3) can be connected with an engine ECU or a control chip capable of controlling the motor (3) to operate is arranged in the motor (3).

6. The oil pump slide block control mechanism driven by the motor and the gear according to claim 1, characterized in that: the sliding block (1) is connected with the oil cavity through a rotating pin (6).

7. The oil pump slide block control mechanism driven by the motor and the gear according to claim 6, characterized in that: the inner wall of the oil cavity is provided with a groove, the side wall of the sliding block (1) is correspondingly provided with an arc-shaped protrusion (7) matched with the groove, and the rotating pin (6) penetrates through the arc-shaped protrusion (7) along the axial direction of the sliding block (1) and is connected to the bottom of the oil cavity.