Electric oil pre-supply pump with speed reducer

Abstract

The invention discloses an electric pre-supply oil pump with a speed reducer, which relates to the technical field of oil pumps and comprises an oil pump and a motor in butt joint with each other. The accelerator is arranged between the motor and the oil pump; wherein the accelerator comprises two groups of accelerating gear sets which are hinged with each other, and the two gear sets are respectively connected with the motor and the oil pump. According to the electric oil pre-supply pump with the speed reduction device, due to the fact that the two accelerators hinged to each other are adopted to form a gearbox between the motor and the oil pump, installation holes in the accelerators can correspond to an output shaft of the motor and an impeller shaft respectively by rotating or pulling the accelerators, and therefore the speed reduction effect is achieved. The technical problems that when a traditional electric pre-supply oil pump is used, an acceleration device cannot be additionally installed in the later period and is inconvenient to replace are effectively solved, then the adaptive relation among an accelerator, a motor and the oil pump is achieved, the follow-up installation and replacement difficulty is lowered, later installation is facilitated, and the adaptability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pumps, in particular to an electric pre-supply oil pump with a deceleration device. Background Art

[0002] An electric pre-supply oil pump is used to provide pressure and flow to lubrication or fuel systems before equipment starts. It typically consists of an electric motor, pump body, and control device. When energized, the motor rotates the pump's rotor or impeller, drawing oil from the tank or storage container through centrifugal force or volumetric change, and pressurizing it to the system requiring it. In lubrication systems, it delivers lubricating oil to various lubrication points before the engine starts, forming an oil film and reducing wear during startup.

[0003] Currently, a Chinese patent application with the patent number "CN202321479310.7" discloses an electric pre-supply oil pump, comprising a motor and a pre-supply oil pump. A clutch is disposed between the motor and the pre-supply oil pump, wherein the output shaft of the motor is connected to the input shaft of the clutch, and the output shaft of the clutch is connected to the input shaft of the pre-supply oil pump. The clutch comprises a housing, wherein a spring is disposed within the housing, and a sliding oil cylinder is disposed to the right of the spring. An oil inlet chamber is disposed at the lower right portion of the sliding oil cylinder, and the upper right portion of the sliding oil cylinder is connected to a friction plate. Although this patent enables the pre-supply oil pump flow rate to be automatically reduced after the oil pressure behind the pump reaches a limit, thereby preventing the pre-supply oil pump motor from overloading, it overlooks a more important point, namely, the speed requirement when the oil pump is in use. Conventional oil pumps and motors are connected via a reduction gearbox, which transmits the motor speed to the oil pump through the acceleration of the gears. The overall structure is fixed and inconvenient to adjust.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were found:

[0005] It is impossible to retrofit an acceleration device later and replacement is inconvenient: Traditional electric pre-supply oil pumps rely on the gearbox to control the speed, and the gearbox and motor are tightly connected via high-strength bolts and connecting flanges. When the pre-supply oil pump needs to be removed or replaced, maintenance personnel must first use tools such as socket wrenches and torque wrenches to unscrew the bolts securing the pump to the vehicle body, then remove it with the help of equipment such as a jack. They must then remove the bolts connecting the gearbox and motor to separate the two. This process is complicated and time-consuming, requiring high professional skills from maintenance personnel. If the pre-supply oil pump is not equipped with a gearbox at the factory, subsequent installation will be extremely difficult, requiring re-planning of the layout, precise measurement of the installation location, and consideration of compatibility. Failure to do so can easily lead to installation failure, affecting performance.

[0006] From a manufacturing perspective, since the gearbox is responsible for connecting and transmitting power between the motor and the oil pump, installation requires a strict sequence. Workers first precisely position the gearbox onto the motor according to the installation markings, initially securing it with locating pins, and then tightening the bolts to the specified torque. The oil pump is then installed on the other side of the gearbox. Because the gearbox gears are fixed in position, workers must visually inspect and use feeler gauges to ensure that the motor output shaft and impeller shaft precisely align with the gear holes. Any deviation requires repeated adjustments, severely restricting installation progress and production efficiency. To address this, we propose an electric pre-supply oil pump with a reduction gear. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In view of the shortcomings of the existing technology, the present invention provides an electric pre-supply oil pump with a deceleration device, which solves the technical problems that the traditional electric pre-supply oil pump cannot be equipped with an acceleration device later and is inconvenient to replace during use.

[0009] (2) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] An electric pre-supply oil pump with a deceleration device, the pre-supply oil pump comprising:

[0012] The oil pump and motor are connected to each other;

[0013] The accelerator is provided between the motor and the oil pump, and is used to connect the motor and the oil pump and adjust the speed output by the motor to the oil pump;

[0014] The accelerator comprises two sets of mutually hinged acceleration gear sets, and the two gear sets are respectively connected to the motor and the oil pump; when the motor rotates, the speed is transmitted to the oil pump through the acceleration gear set.

[0015] Preferably, the acceleration gear set includes two gears meshing with each other, namely a driven gear and a driving gear, and the outer diameter of the driven gear is smaller than the outer diameter of the driving gear.

[0016] Preferably, one driving gear in the two groups of acceleration gear sets is coaxial with the driven gear in the other group and is connected by a docking piece, and the driving gear and the driven gear other than the coaxial connection are connected to the motor and the oil pump respectively;

[0017] The acceleration gear set can rotate with the docking piece as the axis, and the two acceleration gear sets are connected to form a "V" shape.

[0018] Preferably, the two groups of acceleration gear sets are connected by a docking member, and the two docking members can mesh with each other, and the docking member includes a connecting shaft that can be connected to the driven gear or the driving gear, and the front end of the connecting shaft is connected to a plurality of extension columns;

[0019] Wherein, when the two docking parts are connected, the extension column on the connecting shaft and the extension column on the other connecting shaft are staggered with each other.

[0020] Preferably, the end of the extension column is provided with a docking joint, which corresponds to the docking groove provided between two adjacent extension columns;

[0021] Wherein, the front end of the docking joint is provided with an arc-shaped opening, and when the two docking pieces are docked, the buckle rod inside the docking groove is inserted into the opening on the docking joint.

[0022] Preferably, the acceleration gear set further includes a positioning bottom cover, and an outer cover of the positioning bottom cover is provided with a protective cover, and the protective cover covers the outside of the driving gear and the driven gear.

[0023] Preferably, the positioning bottom cover comprises a cover plate that can be docked with the bottom of the protective cover, and the cover plate is provided with two protrusions that can be connected to the bearings on the driven gear or the driving gear through the protrusions;

[0024] A through hole is formed on one of the protrusions, and the two protrusions with the through holes correspond to each other, and the docking piece passes through the through hole.

[0025] Preferably, the protective cover is provided with a limiting ring, and the limiting ring corresponds to the gear inside the protective cover, and the gears are connected to the inner wall of the protective cover through bearings;

[0026] The motor or oil pump passes through the corresponding limiting ring and is connected to the gear inside the protective cover.

[0027] Preferably, reserved grooves are provided on the inner sides of the driven gear and the driving gear, and when the output shaft of the motor or the impeller shaft is inserted into the gear, the key on the shaft corresponds to the reserved groove.

[0028] Preferably, a protective cover is connected between the motor and the oil pump via threads, so as to connect the motor and the oil pump; wherein the protective cover covers the outside of the accelerator.

[0029] (3) Beneficial effects

[0030] 1. Since two mutually articulated accelerators are used to form a "gearbox" between the motor and the oil pump, the accelerator can be rotated or pulled to make the mounting holes on the accelerator correspond to the output shaft of the motor and the impeller shaft respectively, so that it can be adaptively adjusted according to the actual positions of the motor and the impeller shaft. Therefore, it effectively solves the technical problem that the traditional electric pre-supply oil pump cannot be equipped with an accelerator device later and is inconvenient to replace during use. The adaptation relationship between the accelerator, the motor and the oil pump is realized, thereby reducing the difficulty of subsequent installation and replacement, facilitating later installation, and thus improving the adaptability of the device.

[0031] 2. By utilizing the meshing function between the butt joints, the accelerator with the butt joints is installed on the motor output shaft and the impeller shaft of the oil pump respectively, and then the motor and the oil pump are connected together by utilizing the meshing function between the butt joints. After that, a protective cover can be installed on the outside of the accelerator, thereby reducing the difficulty of assembling the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

[0033] Figure 1 is an overall structural diagram of an embodiment of the present invention;

[0034] Figure 2 An exploded schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the explosion of two accelerators in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the accelerator rotation structure in an embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the rotation of the driven gear and the driving gear in an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the explosion of an accelerator in an embodiment of the present invention;

[0039] Figure 7 A schematic diagram of the docking structure of the docking pieces in an embodiment of the present invention;

[0040] Figure 8 Schematic diagram of an explosion of a driving gear according to an embodiment of the present invention;

[0041] Figure 9 This is a performance test diagram of an embodiment of the present invention;

[0042] Figure 10In the embodiment of the present invention Figure 9 Graph of the curve.

[0043] Legend:

[0044] 1. Motor;

[0045] 2. Oil pump; 21. Pump body; 22. Mounting cover; 23. Impeller shaft;

[0046] 3. Protective cover;

[0047] 4. Mounting seat;

[0048] 5. Accelerator; 51. Protective cover; 52. Positioning bottom cover; 521. Cover plate; 522. Protrusion; 53. Driven gear; 54. Driving gear; 55. Docking piece; 551. Connecting shaft; 552. Extension column; 553. Docking head; 554. Docking groove; 555. Buckle rod; 56. Limiting ring. DETAILED DESCRIPTION

[0049] The embodiment of the present application provides an electric pre-supply oil pump with a deceleration device, which effectively solves the technical problem that the traditional electric pre-supply oil pump cannot be retrofitted with an acceleration device and is inconvenient to replace during use. When the traditional electric pre-supply oil pump is used, two mutually hinged accelerators are used to form a "gearbox" between the motor and the oil pump. By rotating or pulling the accelerator, the mounting holes on the accelerator are respectively aligned with the output shaft and the impeller shaft of the motor, so that the accelerator can be adaptively adjusted according to the actual position of the motor and the impeller shaft, thereby achieving an adaptive relationship between the accelerator, the motor and the oil pump, thereby reducing the difficulty of subsequent installation and replacement, making it easier to install later and improving the adaptability of the device. In addition, by utilizing the meshing function between the docking parts, and installing the accelerator with the docking parts on the motor output shaft and the impeller shaft of the oil pump respectively, and then utilizing the meshing function between the docking parts to connect the motor and the oil pump together, a protective cover can be installed on the outside of the accelerator, thereby reducing the difficulty of device assembly. Among them, through gear deceleration, the current of the motor can be reduced without changing the oil output (while also playing a certain protective role for the motor), thereby achieving improved mechanical efficiency, such as Figures 9 to 10 shown.

[0050] Example

[0051] The technical solution in the embodiment of the present application effectively solves the technical problem that the traditional electric pre-fuel pump cannot be equipped with an acceleration device later and is inconvenient to replace during use. The overall idea is as follows:

[0052] In response to the problems existing in the prior art, the present invention provides an electric pre-supply oil pump with a deceleration device, which is mainly composed of three parts: a motor 1, an oil pump 2, and an accelerator 5 connected between the two. The focus of this application is on the "accelerator 5". Compared with the traditional gearbox-type "accelerator 5", the accelerator 5 of this application has a simple structure and can be rotated and adjusted to adapt to motors 1 and oil pumps 2 in different positions. In this way, we can directly purchase existing motors 1 and oil pumps 2 on the market (select similar shapes or sizes) without considering the pairing relationship between the two and the design of the gearbox. In this way, the adaptation problem of the gearbox can be minimized. In order to install the motor 1 and oil pump 2 on the car, a mounting bracket 4 is installed on each of the motor 1 and the oil pump 2, through which they are connected to the car.

[0053] The oil pump 2 includes a pump body 21, a mounting cover 22 mounted at the rear end of the pump body 21, and an impeller shaft 23 mounted on the mounting cover 22. The specific structure is as follows:

[0054] In order to adapt to the positional relationship between the motor 1 and the oil pump 2, the accelerator 5 uses two mutually articulated acceleration gear sets to form a "gearbox", such as Figure 4 As shown, the angle between the two acceleration gear sets can be adjusted by rotating them, thereby moving the mounting holes (corresponding to the retaining ring 56) on the acceleration gear sets. This allows the positions of the two acceleration gear sets to be adjusted to match the different positions of the motor 1 output shaft and the impeller shaft 23 (inside the oil pump 2). This allows the rotation speed of the motor 1 to be transmitted to the oil pump 2 through the acceleration gear sets when the motor 1 rotates.

[0055] The acceleration gear set includes two gears meshing with each other, namely a driven gear 53 and a driving gear 54, and the outer diameter of the driven gear 53 is smaller than the outer diameter of the driving gear 54. Figure 5 Since the outer diameter of the driven gear 53 is smaller than that of the driving gear 54, when the driving gear 54 rotates one circle, the driven gear 53 meshing therewith needs to rotate more than one circle.

[0056] In order to enable the two accelerators 5 to rotate relative to each other, a driving gear 54 in one of the two acceleration gear sets is coaxial with a driven gear 53 in the other set and connected via a docking piece 55. Figure 3 As shown, the drive gear 54 and driven gear 53, which are not coaxially connected, are connected to the motor 1 and the oil pump 2, respectively. The output of the motor 1 is driven by the drive gear 54, which meshes with the driven gear 53. The torque is then transmitted to the drive gear 54 in the other acceleration gear set through the connection of the docking member 55. The above function is repeated, and the power of the motor 1 is ultimately transmitted to the impeller shaft 23. This achieves a double acceleration effect.

[0057] Because the two acceleration gear sets are connected together by the docking member 55, they can rotate about the docking member 55, forming a "V" shape. The position of the two acceleration gear sets can then be adjusted as needed to accommodate different spacings between the output shaft of the motor 1 and the impeller shaft 23.

[0058] The docking piece 55: The two sets of the acceleration gear sets are connected together by the docking piece 55. The docking piece 55 includes a cylindrical connecting shaft 551, and the connecting shaft 551 can be inserted into the center of the driven gear 53 or the driving gear 54, so as to form a linkage with the driven gear 53 or the driving gear 54. The front end of the connecting shaft 551 has three extension columns 552, such as Figure 7 As shown, when the two connecting members 55 are connected, the extension column 552 on one connecting shaft 551 is inserted into the notch on the other connecting shaft 551, staggered with each other, thereby forming a "mutually engaged" state. In this way, when one rotating connecting shaft 551 rotates, the extension column 552 can drive the other connecting shaft 551 to rotate, thereby forming power transmission.

[0059] In order to connect the two docking pieces 55 together, a docking joint 553 is provided at the end of the extension column 552, so that it corresponds to the docking groove 554 opened between the two adjacent extension columns 552. The front end of the docking joint 553 is provided with an arc-shaped opening, and when the two docking pieces 55 are docked, the buckle rod 555 inside the docking groove 554 is inserted into the opening on the docking joint 553, as shown in FIG. Figure 7 As shown in the enlarged view in FIG. When the docking member 55 rotates, the torque is transmitted through the mutually engaged extension columns 552, while the docking head 553 inserted in the docking groove 554 does not bear the rotational torque.

[0060] In order to reduce the safety of the acceleration gear set, the gear is installed on a bar-shaped positioning bottom cover 52, and a protective cover 51 is set on its outside, so that the driving gear 54 and the driven gear 53 are covered inside the driving gear 54 and the driven gear 53. Figure 6 As shown in the figure, the positioning bottom cover 52 has two protrusions 522 on the cover plate 521 to secure the gears. The driven gear 53 and the driving gear 54 are mounted on the two protrusions 522, respectively. The protrusions 522 are connected to the bearings on the driven gear 53 and the driving gear 54. Bearings are connected to both ends of the driven gear 53 and the driving gear 54, so that the driven gear 53 and the driving gear 54 are not affected by the protective cover 51 or the positioning bottom cover 52.

[0061] A through hole is provided on one of the protrusions 522 (providing a space for connection of the docking member 55), and the two protrusions 522 with through holes correspond to each other, and the docking member 55 passes through the through hole. Figure 3 shown.

[0062] An arc-shaped limiting ring 56 is provided on the protective cover 51, and the limiting ring 56 corresponds to the gear inside the protective cover 51. The gears (including the driven gear 53 and the driving gear 54) are connected to the inner wall of the protective cover 51 through bearings. Figure 3 As shown, the limiting ring 56 on the protective cover 51 is for easy observation, and the motor 1 or the oil pump 2 is inserted into the protective cover 51 and connected to the gear inside the protective cover 51.

[0063] In the specific implementation process, take an accelerator 5, and make the limiting ring 56 on the accelerator 5 correspond to the output shaft of the motor 1, and the gear corresponding to the limiting ring 56 is the driving gear 54. Then press the accelerator 5 or use a tool to install the accelerator 5 on the output shaft of the motor 1. Since the limiting ring 56 on the accelerator 5 corresponds to the driving gear 54 inside the protective cover 51, when the output shaft of the motor 1 is inserted into the accelerator 5, it can be connected to the driving gear 54 inside the protective cover 51. Since the driving gear 54 in the protective cover 51 is engaged with the driven gear 53, and the outer diameter of the driven gear 53 is smaller than the outer diameter of the driving gear 54, as shown in FIG. Figure 5 Since the outer diameter of the driven gear 53 is smaller than that of the driving gear 54, when the driving gear 54 rotates one circle, the driven gear 53 meshing therewith needs to rotate more than one circle.

[0064] Then, another accelerator 5 is mounted on the impeller shaft 23. The retaining ring 56 on the accelerator 5 corresponds to the driven gear 53. Therefore, when the accelerator 5 is mounted on the impeller shaft 23, the impeller shaft 23 is connected to the driven gear 53 in the accelerator 5. Both the output shaft of the motor 1 and the impeller shaft 23 are equipped with keys that correspond to the reserved grooves on the driven gear 53 or the driving gear 54. In this way, both the output shaft of the motor 1 and the impeller shaft 23 can rotate synchronously with the driven gear 53 or the driving gear 54 (this structure is a conventional structure and will not be described in detail here).

[0065] After completion, it is time for the final assembly step, where the oil pump 2 and the accelerator 5 on the motor 1 are aligned with each other, and the docking pieces 55 on the accelerator 5 are aligned with each other. At this time, the extension columns 552 on the two docking pieces 55 are staggered, as shown in FIG. Figure 7As shown. In this way, when one of the rotating connecting shafts 551 rotates, the extension column 552 can drive the other connecting shaft 551 to rotate, thereby forming power transmission. In the process of plugging the extension columns 552 into each other, the docking joint 553 at the end of the extension column 552 corresponds to the docking groove 554 opened between the two adjacent extension columns 552. The front end of the docking joint 553 is provided with an arc-shaped opening, and when the two docking parts 55 are docked, the buckle rod 555 inside the docking groove 554 is inserted into the opening on the docking joint 553, as shown. Figure 7 As shown in the enlarged view in FIG. When the docking member 55 rotates, the torque is transmitted through the mutually engaged extension columns 552, while the docking head 553 inserted in the docking groove 554 does not bear the rotational torque.

[0066] Finally, rotate the protective cover 3 connected to the motor 1 to move it toward the accelerator 5 between the motor 1 and the oil pump 2 until the other end of the protective cover 3 is threadedly connected to the outside of the oil pump 2. At this time, the protective cover 3 is threadedly connected to the motor 1 and the oil pump 2 at the same time, and the protective cover 3 covers the outside of the accelerator 5 to protect the accelerator 5. Figure 1 shown.

[0067] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An electric pre-supply oil pump with a deceleration device, characterized in that: The pre-supply oil pump includes: An oil pump (2) and a motor (1) connected to each other; An accelerator (5) is provided between the motor (1) and the oil pump (2), and is used to connect the motor (1) and the oil pump (2) and adjust the speed of the motor (1) output to the oil pump (2); The accelerator (5) comprises two sets of mutually hinged acceleration gear sets, and the two gear sets are respectively connected to the motor (1) and the oil pump (2); when the motor (1) rotates, the rotation speed is transmitted to the oil pump (2) through the acceleration gear set.

2. The electric pre-supply oil pump with a deceleration device according to claim 1, characterized in that: The acceleration gear set comprises two gears meshing with each other, namely a driven gear (53) and a driving gear (54), and the outer diameter of the driven gear (53) is smaller than the outer diameter of the driving gear (54).

3. The electric pre-supply oil pump with a deceleration device according to claim 2, characterized in that: One driving gear (54) in the two acceleration gear sets is coaxial with the driven gear (53) in the other set and is connected via a docking member (55). The driving gear (54) and the driven gear (53) outside the coaxial connection are respectively connected to the motor (1) and the oil pump (2); The acceleration gear set can rotate with the docking member (55) as an axis, and the two acceleration gear sets are connected to form a "V" shape.

4. The electric pre-supply oil pump with a deceleration device according to claim 3, characterized in that: The two groups of acceleration gear sets are connected by a docking member (55), and the two docking members (55) can mesh with each other. The docking member (55) includes a connecting shaft (551) that can be connected to the driven gear (53) or the driving gear (54). The front end of the connecting shaft (551) is connected to a plurality of extension columns (552); When the two docking members (55) are connected, the extension column (552) on the connecting shaft (551) and the extension column (552) on the other connecting shaft (551) are staggered with each other.

5. The electric pre-supply oil pump with a deceleration device according to claim 4, characterized in that: The end of the extension column (552) is provided with a docking joint (553), which corresponds to the docking groove (554) provided between two adjacent extension columns (552); The front end of the docking joint (553) is provided with an arc-shaped opening, and when the two docking members (55) are docked, the buckle rod (555) inside the docking groove (554) is inserted into the opening on the docking joint (553).

6. The electric pre-supply oil pump with a deceleration device according to claim 3, characterized in that: The acceleration gear set further comprises a positioning bottom cover (52), and the outer cover of the positioning bottom cover (52) is provided with a protective cover (51), and the protective cover (51) covers the outside of the driving gear (54) and the driven gear (53).

7. The electric pre-supply oil pump with a deceleration device according to claim 6, characterized in that: The positioning bottom cover (52) includes a cover plate (521) that can be docked with the bottom of the protective cover (51), and the cover plate (521) is provided with two protrusions (522) that can be connected to the bearings on the driven gear (53) or the driving gear (54) through the protrusions (522); A through hole is provided on one of the protrusions (522), and the two protrusions (522) with the through holes correspond to each other, and the docking member (55) passes through the through hole.

8. The electric pre-supply oil pump with a deceleration device according to claim 7, characterized in that: The protective cover (51) is provided with a limiting ring (56), and the limiting ring (56) corresponds to the gear inside the protective cover (51), and the gears are connected to the inner wall of the protective cover (51) through bearings; The motor (1) or the oil pump (2) passes through a corresponding limiting ring (56) and is connected to a gear inside the protective cover (51).

9. The electric pre-supply oil pump with a deceleration device according to claim 2, characterized in that: The inner sides of the driven gear (53) and the driving gear (54) are both provided with reserved grooves, and when the output shaft of the motor (1) or the impeller shaft (23) is inserted into the gears, the keys on the shafts correspond to the reserved grooves.

10. The electric pre-supply oil pump with a deceleration device according to claim 1, characterized in that: A protective cover (3) is threadedly connected between the motor (1) and the oil pump (2), and the motor (1) and the oil pump (2) can be connected.

Images