Oil pump motor assembly

Abstract

The utility model belongs to the field of oil pump motors, and particularly relates to an oil pump motor assembly which comprises a motor, a planetary reduction mechanism, a valve body assembly, a gear pump, an oil pump oil tank assembly and the like, the motor assembly is connected with one end of the valve body assembly, a stator and a rotor are arranged in an inner cavity on one side of the motor assembly, and the planetary reduction mechanism is arranged in an inner cavity on the other side of the motor assembly. The rotor output end of the motor assembly is connected with the planetary reduction mechanism and provides power, the other end of the valve body assembly is connected with the oil pump oil tank assembly, the output end of the planetary reduction mechanism is connected with the oil pump oil tank assembly and provides power, and a controller electrically connected with the motor assembly is arranged at the rear end of the motor assembly. The high rotating speed output by the motor assembly is decelerated through the planetary speed reduction mechanism, so that the gear pump stably drives hydraulic oil to flow into an oil cylinder of an external device at the rated rotating speed, the oil pump motor assembly is compact in structure, the size is reduced, the application scenarios of the oil pump motor are increased, and meanwhile the production cost of the oil pump motor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil pump motors, specifically an oil pump motor assembly. Background Technology

[0002] Existing oil pump motor assemblies generally adopt a direct motor-driven oil pump solution. Due to the working characteristics of hydraulic oil, the operating speed of the oil pump is generally set at around 3000 rpm. Too high a speed will cause the efficiency of converting mechanical energy into hydraulic energy to drop too quickly and increase noise. Too low a speed will cause the oil pump to increase in size. However, for the motor, its rated output power is proportional to the motor speed and torque, and the motor output torque is proportional to the motor size. Therefore, under the same size, the higher the motor speed, the greater its rated output power. Conversely, under the same output power condition, increasing the motor operating speed can reduce the motor output torque and the motor size can be reduced. Because the existing direct drive solution generally has a low motor operating speed, the oil pump motor is relatively large, resulting in higher manufacturing costs. Moreover, the large size of the oil pump motor will limit the application environment of the oil pump motor. Therefore, an oil pump motor assembly is proposed to address the above problems. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, this utility model proposes an oil pump motor assembly.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an oil pump motor assembly, including a motor assembly, one end of which is connected to a valve body assembly, a stator and a rotor are provided on one side of the motor assembly, a planetary reduction mechanism is provided in the inner cavity on the other side of the motor assembly, the rotor output end of the motor assembly is connected to the planetary reduction mechanism and provides power, the other end of the valve body assembly is connected to an oil pump tank assembly, the output end of the planetary reduction mechanism is connected to the oil pump tank assembly and provides power, and a controller electrically connected to the motor assembly is provided at the rear end of the motor assembly;

[0005] Preferably, the valve body assembly includes a valve body housing, the valve body housing having a channel structure for oil flow, and the valve body housing having a safety valve and an electromagnetic directional valve for controlling the opening and closing of the channel structure.

[0006] Preferably, the planetary reduction mechanism includes an internal gear ring, one end of which is fixedly connected to the motor assembly, and the other end of which is fixedly connected to the valve body assembly. A planet carrier is provided on the inner side of the internal gear ring, and a set of planetary gears that mesh with the sun gear at the output end of the motor assembly is provided on the planet carrier. The sun gear and the output shaft of the motor assembly are an integral structure. The output end of the planet carrier is connected to the oil pump tank assembly and provides power.

[0007] Preferably, the oil pump tank assembly includes an oil tank housing, in which a gear pump is built-in, and the gear pump is connected to the output end of the planetary carrier.

[0008] Preferably, the motor assembly is provided with a ventilated component to prevent lubricating grease from spilling into the motor assembly.

[0009] Preferably, the motor assembly includes a motor housing with a void structure inside, and the venting assembly includes a venting bend for storing spilled grease, one end of which is connected to a planetary reduction gear mechanism, and the other end of which is connected to the void structure.

[0010] The advantages of this utility model are:

[0011] 1. The high speed output of the motor assembly is reduced by the planetary reduction mechanism, so that the gear pump can stably drive the hydraulic oil into the cylinder of the external device at the rated speed. This design makes the oil pump motor assembly compact and reduces its size, which increases the application scenarios of the oil pump motor, while also reducing the production cost of the oil pump motor.

[0012] 2. The motor housing is designed with casting gaps, and a venting component is designed inside the gap structure. There is a pipe at the bottom of the planetary reduction mechanism leading to this gap. During the operation of the planetary reduction mechanism, the heat generated causes the expanding grease to enter the housing gap through the pipe, preventing it from entering the motor through the bearing. The motor cools down, and the grease flows back to the transmission mechanism. The venting component is used to deal with the diffusion of lubricating grease in the motor components, preventing the lubricating grease from spreading to other parts of the machine body, such as the oil pump and motor.

[0013] 3. This invention can be applied to electric pallet trucks to provide hydraulic energy to the lifting components of the pallet truck. This invention can also be applied to other devices that require small-amplitude lifting and intermittent operation. The motor assembly of this invention uses a permanent magnet brushless motor. This invention has the advantages of small size, providing stable pressure without the need for additional deceleration devices, and integrating motor technology, transmission technology and hydraulic technology. It can provide stable hydraulic power without the need for additional deceleration devices. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a partial cross-sectional structural diagram of the present invention;

[0016] Figure 2 This is an exploded view of the gearbox and oil pump motor of this utility model;

[0017] Figure 3 This is an exploded view of the oil tank and planetary gear set of this utility model.

[0018] In the picture:

[0019] 1. Oil pump and tank assembly; 11. Gear pump; 12. Tank housing; 2. Valve body assembly; 21. Safety valve; 22. Valve body housing; 23. Channel structure; 3. Solenoid directional valve; 4. Motor assembly; 41. Motor housing; 42. Gap structure; 5. Vent assembly; 51. Vent bend; 6. Controller; 7. Planetary reduction mechanism; 71. Planetary carrier; 72. Internal gear ring; 73. Planetary gear set. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0022] This application discloses an oil pump motor assembly, including a motor assembly 4. The motor assembly 4 is connected to one end of a valve body assembly 2. A stator and a rotor are provided in the inner cavity on one side of the motor assembly 4, and a planetary reduction mechanism 7 is provided in the inner cavity on the other side of the motor assembly 4. The output end of the rotor of the motor assembly 4 is connected to the planetary reduction mechanism 7 and provides power. The other end of the valve body assembly 2 is connected to an oil pump tank assembly 1. The output end of the planetary reduction mechanism 7 is connected to the oil pump tank assembly 1 and provides power. A controller 6 electrically connected to the motor assembly 4 is provided at the rear end of the motor assembly 4.

[0023] The valve body assembly 2 includes a valve body housing 22, the valve body housing 22 is provided with a channel structure 23 for oil flow, and the valve body housing 22 is provided with a safety valve 21 and an electromagnetic reversing valve 3 for controlling the opening and closing of the channel structure 23.

[0024] The planetary reduction mechanism 7 includes an internal gear ring 72, one end of which is fixedly connected to the motor assembly 4, and the other end of which is fixedly connected to the valve body assembly 2. A planet carrier 71 is provided on the inner side of the internal gear ring 72. A planetary gear set 73 is provided on the planet carrier 71, which meshes with the sun gear at the output end of the motor assembly 4. The sun gear and the output shaft of the motor assembly 4 are an integral structure. The output end of the planet carrier 71 is connected to the oil pump tank assembly 1 and provides power.

[0025] The oil pump tank assembly 1 includes an oil tank housing 12, and a gear pump 11 is built into the oil tank housing 12. The gear pump 11 is connected to the output end of the planetary carrier 71.

[0026] The motor assembly 4 is provided with a breathable component 5 to prevent lubricating grease from spilling into the motor assembly 4.

[0027] The motor assembly 4 includes a motor housing 41, and a void structure 42 is provided inside the motor housing 41. The ventilated assembly 5 includes a ventilated bend 51 for storing overflowing grease. One end of the ventilated bend 51 is connected to the planetary reduction mechanism 7, and the other end of the ventilated bend 51 is connected to the void structure 42.

[0028] Working principle: During operation, the controller 6, electrically connected to the motor assembly 4, starts the motor assembly 4, causing its rotor to rotate. The planetary gear set 73 in the planetary reduction mechanism 7 meshes with the sun gear at the output end of the motor assembly 4. The sun gear and the output shaft of the motor assembly 4 are a single unit, causing the planetary gear set 73 to rotate under the influence of the sun gear. The planetary gear set 73 also meshes with the tooth grooves within the internal gear ring 72, reducing the output speed of the planet carrier 71 connected to it. The end of the planet carrier 71 is connected to the input end of the gear pump 11, resulting in the reduced speed of the planet carrier 71 driving the gear at the input end of the gear pump 11 to rotate. The high speed output of the motor assembly 4 is reduced by the planetary reduction mechanism 7, so that the gear pump 11 can operate at its rated speed. Under the action of the gear pump 11, the hydraulic oil stored in the oil tank shell 12 enters the channel structure 23 of the valve body assembly 2. The oil tank shell 12 is used to store hydraulic oil. The outlet of the channel structure 23 is connected to the cylinder of the external device. The gear at the input end of the gear pump 11 drives the hydraulic oil in the oil tank shell 12 to flow into the cylinder of the external device through the channel structure 23. The input shaft of the gear pump 11 has a driving gear, which drives the driven gear. The two gears mesh and rotate, one side sucks in the hydraulic oil in the oil tank shell 12, and the other side squeezes out the hydraulic oil under high pressure, so that the external device can obtain hydraulic energy.

[0029] While the motor assembly 4 is rotated under the control of the controller 6, the gear pump 11 forces hydraulic oil under high pressure, causing the hydraulic oil to flow into the channel structure 23. When the hydraulic oil flows to the solenoid directional valve 3, because the solenoid directional valve 3 has two channels, the main channel is in a fixed position and is fixed in that position when not in operation. A check valve is also installed on the main channel. When the hydraulic oil flows in, it can directly open the check valve and enter the cylinder of the external device. When the motor assembly 4 stops rotating and no longer supplies hydraulic oil, the check valve of the main channel of the solenoid directional valve 3 closes automatically, cutting off the flow. The hydraulic oil in the external device cylinder does not flow back into the oil tank housing 12. When the hydraulic oil in the external device cylinder needs to flow back into the oil tank housing 12, i.e., when the heavy object being lifted by the external device needs to be lowered, the solenoid directional valve 3 switches to another channel, allowing the hydraulic oil to flow back into the oil tank housing 12. When it is necessary to control the external device to lower slightly, the control button of the solenoid directional valve 3 is released, and the solenoid directional valve 3 automatically switches back to its normal position, cutting off the oil passage again, and the heavy object stops at the required height. The safety valve 21 connected to the channel structure 23 is used for pressure relief. When the pressure inside the channel structure 23 becomes too high, the safety valve 21 can release the pressure. Through the above actions, when the external device's cylinder lifts the item to the user's desired position, even if the motor assembly 4 stops operating, the external device's cylinder will not be forced back into the oil tank housing 12 due to gravitational potential energy. This is because the solenoid directional valve 3 promptly blocks the channel of the channel structure 23, preventing the hydraulic oil in the external device's cylinder from flowing back. When the heavy object lifted by the external device's cylinder needs to be lowered, pressing the control solenoid directional valve 3... The button allows the channel structure 23 to flow again. At this time, the cylinder of the external device is subjected to the gravitational potential energy of the heavy object, causing the hydraulic oil in the cylinder of the external device to flow back to the oil tank shell 12 through the channel structure 23. During the process of hydraulic oil recirculation, it will impact the impeller of the gear pump 11, causing the gear pump 11 to be driven. The gear pump 11 drives the motor assembly 4 to rotate through the planetary reduction mechanism 7. The motor assembly 4 can use the kinetic energy of the hydraulic oil recirculation to convert it into a generator to charge the external battery, thereby saving energy and achieving the effect of energy saving and emission reduction.

[0030] The high speed output of the motor assembly 4 is reduced by the planetary reduction mechanism 7, so that the gear pump 11 can stably output high pressure at the rated speed, so that the hydraulic oil flows into the cylinder of the external device. This design makes the oil pump motor assembly compact and reduces its size, increasing the application scenarios of the oil pump motor, while also reducing the production cost of the oil pump motor.

[0031] The motor housing has a casting gap, and a venting component 5 is designed inside the gap structure 42. The bottom of the planetary reduction mechanism 7 has a pipe leading to this gap. During operation, the planetary reduction mechanism 7 generates heat, causing the expanded grease to enter the housing gap through the pipe, preventing it from entering the motor through the bearing. The motor cools down, and the grease flows back to the transmission mechanism. The venting component 5 is used to handle the diffusion of lubricating grease in the motor assembly 4, preventing the lubricating grease from spreading to other parts of the machine and damaging the oil pump motor.

[0032] This invention can be applied to electric pallet trucks to provide power to the lifting components of the pallet trucks. This invention can also be applied to other devices that require small-amplitude lifting and intermittent operation. The motor assembly 4 of this invention uses a permanent magnet brushless motor. This invention has the advantages of small size, providing stable pressure operation without the need for additional deceleration devices, and small size. It integrates motor technology, transmission technology and hydraulic technology, and can provide stable hydraulic power without the need for additional deceleration devices.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An oil pump motor assembly comprising a motor assembly (4) characterised in that: The motor assembly (4) is connected with one end of the valve body assembly (2), the inner cavity of one side of the motor assembly (4) is provided with a stator and a rotor, the inner cavity of the other side of the motor assembly (4) is provided with a planetary reduction mechanism (7), the rotor output end of the motor assembly (4) is connected with the planetary reduction mechanism (7) and provides power, the other end of the valve body assembly (2) is connected with the oil pump oil tank assembly (1), the output end of the planetary reduction mechanism (7) is connected with the oil pump oil tank assembly (1) and provides power, and the rear end of the motor assembly (4) is provided with a controller (6) which is electrically connected with the motor assembly (4).

2. An oil pump motor assembly as claimed in claim 1, characterized in that: The valve body assembly (2) comprises a valve body shell (22), the valve body shell (22) is provided with a channel structure (23) for oil flow, the valve body shell (22) is provided with a safety valve (21) and an electromagnetic reversing valve (3) for controlling the opening and closing of the channel structure (23).

3. An oil pump motor assembly as in claim 1, wherein: The planetary reduction mechanism (7) comprises an inner gear ring (72), one end of the inner gear ring (72) is fixedly connected with the motor assembly (4), the other end of the inner gear ring (72) is fixedly connected with the valve body assembly (2), the inner side of the inner gear ring (72) is provided with a planet carrier (71), the planet carrier (71) is provided with a planetary gear set (73) which is engaged with the sun gear of the output end of the motor assembly (4), the sun gear and the output end of the motor assembly (4) are an integral structure, and the output end of the planet carrier (71) is connected with the oil pump oil tank assembly (1) and provides power.

4. An oil pump motor assembly as claimed in claim 3, characterized in that: The oil pump oil tank assembly (1) comprises an oil tank shell (12), the oil tank shell (12) is built-in with a gear pump (11), and the gear pump (11) is connected with the output end of the planet carrier (71).

5. An oil pump motor assembly as recited in claim 1 wherein: The motor assembly (4) is provided with a breathable assembly (5) which prevents the overflow of lubricating grease into the motor assembly (4).

6. An oil pump motor assembly as claimed in claim 5, characterized in that: The motor assembly (4) comprises a motor shell (41), the motor shell (41) is provided with a gap structure (42), the breathable assembly (5) comprises a breathable elbow (51) for storing the overflowed grease, one end of the breathable elbow (51) is connected with the planetary reduction mechanism (7), and the other end of the breathable elbow (51) is connected with the gap structure (42).

Images