A motor and an engineering vehicle with magnetoelectric induction variable speed function

Abstract

The present invention discloses a motor with a magnetoelectric induction speed change function, including that a hydraulic oil inlet channel and a hydraulic oil outlet channel are arranged in the motor rear cover. A distribution shaft is further arranged in the motor rear cover, an adjustment channel is arranged in the distribution shaft, a valve core is arranged in the adjustment channel, a plurality of channel adjustment grooves are arranged on the inner wall of the adjustment channel, a plurality of valve core adjustment grooves are arranged around the outer periphery of the valve core, the channel adjustment grooves communicate with the rotor assembly, the hydraulic oil inlet channel and the hydraulic oil outlet channel, the movement of the valve core controls the disconnection or connection of the channel adjustment grooves and the valve core adjustment grooves. The valve core is made of a magnetic material, an electromagnet is arranged on one side of the valve core, and a return spring is arranged between the electromagnet and the valve core. The valve core is pushed to move under the dual action of the electromagnet and the return spring. The advantages are that the electromagnet structure is simple and the speed change is stable.

Description

Technical Field

[0001] The present invention relates to the field of motors, and more particularly to a motor and an engineering vehicle with magnetoelectric induction variable speed function. Background Art

[0002] In mines, tunnels and coal mine transportation, heavy transportation vehicles are required. A hydraulic motor that provides power for the heavy transportation vehicle is installed on the heavy transportation vehicle, and the hydraulic motor drives the wheels of the transportation vehicle to make the vehicle move forward. Since during the driving process of heavy vehicles, especially in mines, tunnels and tunnel construction sites with complex road conditions, in order to ensure safety, the driver needs to precisely control the vehicle speed to increase or decrease slowly at any time, so as to achieve the purpose of safe loading and safe driving, while taking into account the requirements of economy.

[0003] One way of a traditional low-speed high-torque hydraulic motor is to separately configure a hydraulic regulating valve on the hydraulic motor to halve the displacement of the hydraulic motor to achieve the purpose of increasing the motor speed. The speed of the hydraulic motor has a doubling relationship. That is to say, when the external oil source flow is constant, when the motor displacement is reduced to half of the original, the vehicle speed at this time is twice the original. A spool is arranged in the hydraulic regulating valve, and the spool is moved through hydraulic control to change the number of channels, thereby controlling the hydraulic pressure to achieve variable speed.

[0004] The disadvantages of the prior art are as follows: The hydraulic oil itself is compressible and air is easily introduced into it. The performance of the pressure reducing valve and the reversing valve is unstable, which will cause the variable speed of the supporting vehicle to be unstable; the three major faults of hydraulics: leakage, vibration, and noise have always been difficult problems in hydraulic technology. At the same time, the complex structure and high failure rate are also determined by its own characteristics. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a motor and an engineering vehicle with magnetoelectric induction variable speed function that use electromagnetic induction to drive the spool to move to adjust the speed.

[0006] The technical solution adopted by the present invention to solve the above technical problems is a motor with magnetoelectric induction variable speed function, including a motor front cover, a motor rear cover, a stator, and a rotor assembly connected to a wheel shaft. A plurality of plunger assemblies that can move radially are arranged around the rotor assembly. It is characterized in that a hydraulic oil inlet channel and a hydraulic oil outlet channel are arranged in the motor rear cover. A distribution shaft is also arranged in the motor rear cover. An adjustment channel is arranged in the distribution shaft. A valve core is arranged in the adjustment channel. A plurality of channel adjustment grooves are arranged on the inner wall of the adjustment channel, and a plurality of valve core adjustment grooves are arranged around the outer periphery of the valve core. The channel adjustment grooves communicate with the rotor assembly, the hydraulic oil inlet channel, and the hydraulic oil outlet channel. The movement of the valve core controls the disconnection or connection of the channel adjustment grooves and the valve core adjustment grooves. The valve core is made of a magnetic material. An electromagnet is arranged on one side of the valve core, and a return spring is arranged between the electromagnet and the valve core. The valve core is pushed to move under the dual action of the electromagnet and the return spring.

[0007] A further preferred solution of the present invention is that the channel adjustment grooves include a first adjustment groove, a second adjustment groove, a third adjustment groove, and a fourth adjustment groove; in the normal state, the first adjustment groove and the second adjustment groove are connected, the third adjustment groove and the fourth adjustment groove are connected, the second adjustment groove and the third adjustment groove are disconnected, and high-pressure hydraulic oil flows in the pipelines corresponding to the first adjustment groove, the second adjustment groove, the third adjustment groove, and the fourth adjustment groove; after the valve core moves, the first adjustment groove and the second adjustment groove are disconnected, the third adjustment groove and the fourth adjustment groove are disconnected, there is no longer high-pressure hydraulic oil in the pipelines corresponding to the second adjustment groove and the third adjustment groove, and high-pressure hydraulic oil continuously exists in the pipelines corresponding to the first adjustment groove and the fourth adjustment groove. The reduction in the number of hydraulic oils that can be introduced leads to an increase in the rotational speed of the motor.

[0008] A further preferred solution of the present invention is that the valve core adjustment groove is an annular groove surrounding the outer side of the valve core.

[0009] A further preferred solution of the present invention is that the two sides of the valve core adjustment groove are the valve core side walls, and buffer grooves are arranged on the valve core side walls, and the buffer grooves are connected to one side of the valve core adjustment groove.

[0010] A further preferred solution of the present invention is that there are two valve core adjustment grooves, and four buffer grooves are arranged on both sides of the adjustment groove respectively.

[0011] A further preferred solution of the present invention is that a supplementary oil valve core is arranged inside the valve core. After the valve core moves, the supplementary oil valve core is used to connect the first adjustment groove, the second adjustment groove, and the third adjustment groove, or to connect the second adjustment groove, the third adjustment groove, and the fourth adjustment groove.

[0012] A further preferred embodiment of the present invention is as follows: The oil replenishing spool includes a valve body which can move left and right in the valve cavity. The valve body includes two oil replenishing channel assemblies. Each oil replenishing channel assembly includes two longitudinal pipes and a transverse pipe. The transverse pipe is arranged in the middle of the longitudinal pipes, and the transverse pipe and the longitudinal pipes form an "I" structure. The outer end of the transverse pipe communicates with the valve cavity, and the two oil replenishing channel assemblies are symmetrically arranged on both sides of the valve body. When the oil replenishing spool is on the left side, the first adjustment groove, the second adjustment groove and the third adjustment groove are communicated; when the oil replenishing spool is on the right side, the second adjustment groove, the third adjustment groove and the fourth adjustment groove are communicated.

[0013] A further preferred embodiment of the present invention is as follows: Channels extending outward to the valve cavity are provided at the upper port and the lower port of the longitudinal pipe closer to the outside.

[0014] A further preferred embodiment of the present invention is as follows: Two spool adjustment grooves are provided on the spool. The two spool adjustment grooves and the side wall of the spool are respectively communicated with four groups of spool channels, and the four groups of spool channels correspond to the four longitudinal pipes.

[0015] A further preferred embodiment of the present invention is as follows: The four groups of spool channels are respectively the first group of spool channels, the second group of spool channels, the third group of spool channels and the fourth group of spool channels. The two spool adjustment grooves are respectively the first spool adjustment groove and the second spool adjustment groove. The first group of spool channels communicates with the first spool adjustment groove, the second group of spool channels communicates with the side wall of the spool, the third group of spool channels communicates with the second spool adjustment groove, and the fourth group of spool channels communicates with the side wall of the spool.

[0016] A further preferred embodiment of the present invention is as follows: When the oil replenishing spool is on the right side, there is a communication gap between the inner longitudinal pipe of the right oil replenishing channel assembly and the third group of spool channels.

[0017] In the present invention, the spool is made of a magnetic material, and an electromagnet is provided on one side of the spool. A return spring is provided between the electromagnet and the spool. In the normal speed state, the electromagnet is energized to generate suction to adsorb the spool on the right side, and the return spring is compressed between the electromagnet and the spool. When speed change is required, the electromagnet is de-energized, and the return spring pushes the spool to move left. The movement of the spool causes a change in the amount of high-pressure hydraulic oil flowing through the channel adjustment groove, thereby controlling the change in the motor speed. The present invention eliminates hydraulic oil, will not mix in air, does not require hydraulic structures such as pressure reducing valves and reversing valves, and will not have technical problems such as hydraulic oil leakage, vibration and noise. The electromagnet structure is simple and the speed change is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the motor when the hydraulic oil enters the channel from the right side and is in the normal speed state;

[0019] Figure 2Schematic diagram of the structure when the motor is fed with hydraulic oil from the hydraulic oil inlet channel on the right side and is in a variable speed state;

[0020] Figure 3 Schematic diagram of the structure when the motor is fed with hydraulic oil from the hydraulic oil inlet channel on the left side and is in a constant speed state;

[0021] Figure 4 Schematic diagram of the structure when the motor is fed with hydraulic oil from the hydraulic oil inlet channel on the left side and is in a variable speed state;

[0022] Figure 5 For Figure 1 The enlarged view of part A in

[0023] Figure 6 For Figure 2 The enlarged view of part B in

[0024] Figure 7 Schematic diagram of the principle of the channel adjustment groove and the corresponding pipeline;

[0025] Figure 8 Schematic diagram of the structure of the oil replenishing valve core;

[0026] Figure 9 Stereogram of the valve core. Detailed implementation mode

[0027] The present invention will be further described in detail below with reference to the embodiments in the drawings.

[0028] As Figures 1 - 9 shown, a motor with a magneto - electric induction variable speed function includes a motor front cover 1, a motor rear cover 2, a stator 3, and a rotor assembly 31 connected to a wheel shaft 4. The motor front cover 1 is arranged on the left side, the motor rear cover 2 is arranged on the right side, and the rotor assembly 31 is arranged in the cavity formed by the motor front cover 1 and the motor rear cover 2. A plurality of plunger assemblies 5 that can move radially are arranged outside the rotor assembly 31. High - pressure hydraulic oil pushes the plunger assemblies 5 to perform piston motion, and the stator 3 remains stationary, so that the rotor assembly drives the wheel shaft 4 to rotate. A hydraulic oil inlet channel 6 and a hydraulic oil discharge channel 7 are arranged in the motor rear cover 2. As Figure 3 and Figure 4As shown, the functions of the hydraulic oil inlet passage 6 and the hydraulic oil outlet passage 7 can be interchanged. A distribution shaft 8 is also provided inside the motor rear cover 2. An adjustment passage 9 is provided inside the distribution shaft 8. A valve core 10 is provided inside the adjustment passage 9. A plurality of passage adjustment grooves 12 are provided on the inner wall of the adjustment passage 9. A plurality of valve core adjustment grooves 11 are provided on the outer periphery of the valve core 10. The passage adjustment grooves 12 and the valve core adjustment grooves 11 cooperate with each other to control the quantity of high-pressure hydraulic oil in the pipeline corresponding to the passage adjustment grooves 12. The passage adjustment grooves 12 communicate with the rotor assembly 31, the hydraulic oil inlet passage 6 and the hydraulic oil outlet passage 7. The high-pressure hydraulic oil first enters from the hydraulic oil inlet passage 6, enters the distribution shaft 8, then enters the rotor assembly 31. After the high-pressure hydraulic oil in the rotor assembly 31 finishes working, it becomes low-pressure hydraulic oil. The low-pressure hydraulic oil enters the distribution shaft 8 again and finally flows out from the hydraulic oil outlet passage 7. The movement of the valve core 10 controls the disconnection or connection of the passage adjustment grooves 12 and the valve core adjustment grooves 11. The valve core 10 is made of magnetic material. An electromagnet 13 is provided on one side of the valve core 10. The circuit controls the energization and de-energization of the electromagnet 13. A return spring 14 is provided between the electromagnet 13 and the valve core 10. Under the dual action of the electromagnet 13 and the return spring 14, the valve core 10 is pushed to move. In the normal speed state, the electromagnet 13 is energized to generate suction to adsorb the valve core 10 on the right side, and the return spring 14 is compressed between the electromagnet 13 and the valve core 10. When speed change is required, the electromagnet 13 is de-energized, and the return spring 14 pushes the valve core 10 to move leftward. The movement of the valve core 10 causes a change in the quantity of high-pressure hydraulic oil flowing through the passage adjustment grooves 12, thereby controlling the change in the motor speed.

[0029] As Figure 5 , Figure 6As shown, the channel adjustment slots 12 from left to right are: the first adjustment slot 21, the second adjustment slot 22, the third adjustment slot 23, and the fourth adjustment slot 24. The hydraulic oil inlet channel 6 is connected to the fourth adjustment slot 24, and the hydraulic oil outlet channel 7 is connected to the first adjustment slot 21. When in the normal state, the first adjustment slot 21 and the second adjustment slot 22 are connected, the third adjustment slot 23 and the fourth adjustment slot 24 are connected, the second adjustment slot 22 and the third adjustment slot 23 are disconnected, and high-pressure hydraulic oil flows in the pipelines corresponding to the first adjustment slot 21, the second adjustment slot 22, the third adjustment slot 23, and the fourth adjustment slot 24. Specifically, high-pressure hydraulic oil enters the fourth adjustment slot 24 and the two inlets of the self-provided oil inlet channel from the hydraulic oil inlet channel 6. The two inlets of the oil inlet channel enter the rotor assembly 31 and then enter the two outlets of the oil outlet channel, and are discharged from the hydraulic oil outlet channel 7. The hydraulic oil in the fourth adjustment slot 24 enters the third adjustment slot 23. The hydraulic oil in the third adjustment slot 23 enters the four inlets of the oil inlet channel. The hydraulic oil in the four inlets of the oil inlet channel passes through the rotor assembly 31 and then enters the second adjustment slot 22 and then enters the first adjustment slot 21, and finally flows out from the hydraulic oil outlet channel 7, realizing the work of six-way high-pressure hydraulic oil. After the valve core 10 moves, the first adjustment slot 21 and the second adjustment slot 22 are disconnected, the third adjustment slot 23 and the fourth adjustment slot 24 are disconnected, and there is no longer high-pressure hydraulic oil in the pipelines corresponding to the second adjustment slot 22 and the third adjustment slot 23. The pipelines corresponding to the first adjustment slot 21 and the fourth adjustment slot 24 are continuously filled with high-pressure hydraulic oil. Only two-way high-pressure hydraulic oil does work on the rotor assembly 31, changing from six-way to two-way. The number of lines that the hydraulic oil of a unit quantity can pass through decreases, resulting in an increase in the rotational speed of the motor. The valve core adjustment slot 11 is an annular slot surrounding the outside of the valve core 10. On both sides of the valve core adjustment slot 11 are the valve core side walls 15. Buffer slots 16 are provided on the valve core side walls 15. The buffer slots 16 are connected to one side of the valve core adjustment slot 11. The contact surface of the buffer slots 16 with the high-pressure hydraulic oil is small, and the initial force generated is small. As the four adjustment slots come into contact, because the contact surface is large, the force generated increases significantly, thus playing a role of providing a small initial force before providing a large force, making the movement of the valve core 10 smoother. There are two valve core adjustment slots 11, and there are four buffer slots 16 which are respectively arranged on both sides of the valve core adjustment slots 11. The buffer slots 16 provide buffering effects in all directions.

[0030] After the spool 10 moves, the hydraulic oil in the second adjustment groove 22, the third adjustment groove 23 and the corresponding pipelines is cut off. However, at this time, the hydraulic oil in the second adjustment groove 22, the third adjustment groove 23 and the corresponding pipelines is still affected by the movement of the rotor plunger. The change in the volume of the plunger hole where the plunger is located creates a vacuum in the second adjustment groove 22, the third adjustment groove 23 and the corresponding pipelines, resulting in motor vibration. In order to reduce motor vibration, it is necessary to replenish hydraulic oil to the second adjustment groove 22, the third adjustment groove 23 and the corresponding pipelines. The present invention uses the hydraulic oil in the first adjustment groove 21 to replenish the second adjustment groove 22, the third adjustment groove 23 and the corresponding pipelines. The specific solution is: Since the hydraulic oil inlet channel 6 and the hydraulic oil outlet channel 7 are structures that can be swapped, it causes the reverse change of other structural functions. As Figure 1 、 Figure 2 shown, when the right side is the hydraulic oil inlet channel 6, a replenishing oil spool 30 is arranged inside the spool 10. When the electromagnet 13 is powered off and the spool 10 moves to the left, the replenishing oil spool 30 is located on the left side. The replenishing oil spool 30 is used to connect the first adjustment groove 21, the second adjustment groove 22 and the third adjustment groove 23, so that the hydraulic oil in the first adjustment groove 21 enters the second adjustment groove 22 and the third adjustment groove 23. As Figure 3 、 Figure 4As shown in the figure, when the hydraulic oil enters the channel 6 on the left side, a make-up oil spool 30 is arranged inside the valve core 10. When the electromagnet 13 is de-energized and the valve core 10 moves to the left side, the make-up oil spool 30 is located on the right side. The make-up oil spool 30 communicates with the second adjustment groove 22, the third adjustment groove 23 and the fourth adjustment groove 24, so that the hydraulic oil in the fourth adjustment groove 24 enters the second adjustment groove 22 and the third adjustment groove 23. The make-up oil spool 30 includes a valve body 17. The valve body 17 can move left and right in the valve cavity 18. The valve body 17 includes two make-up oil channel components on the left and right. The make-up oil channel component includes two longitudinal pipes 19 and a transverse pipe 20. The transverse pipe 20 is arranged in the middle of the longitudinal pipes 19. The transverse pipe 20 and the longitudinal pipes 19 form an I-shaped structure. The outer end of the transverse pipe 20 communicates with the valve cavity 18. The two make-up oil channel components are symmetrically arranged on both sides of the valve body 17. When the make-up oil spool 30 is on the left side, it communicates with the first adjustment groove 21, the second adjustment groove 22 and the third adjustment groove 23. When the make-up oil spool 30 is on the right side, it communicates with the second adjustment groove 22, the third adjustment groove 23 and the fourth adjustment groove 24. The upper port and the lower port of the longitudinal pipe 19 near the outside are provided with channels 25 extending outward to the valve cavity 18. Two valve core adjustment grooves 11 are arranged on the valve core 10. The two valve core adjustment grooves 11 and the side wall of the valve core 10 communicate with four groups of valve core channels respectively. The four groups of valve core channels correspond to the four longitudinal pipes 19. The four groups of valve core channels are the first group of valve core channels 41, the second group of valve core channels 42, the third group of valve core channels 43 and the fourth group of valve core channels 44. The two valve core adjustment grooves 11 are the first valve core adjustment groove 51 and the second valve core adjustment groove 52 respectively. The first group of valve core channels 41 communicates with the first valve core adjustment groove 51. The second group of valve core channels 42 communicates with the side wall of the valve core 10. The third group of valve core channels 43 communicates with the second valve core adjustment groove 52. The fourth group of valve core channels 44 communicates with the side wall of the valve core 10. When the make-up oil spool 30 is located on the left side, when the make-up oil spool 30 is located on the right side, there is a communication gap between the inner longitudinal pipe 19 of the right make-up oil channel component and the third group of valve core channels 43. Due to the structural limitations inside the valve core, the scheme of small-hole make-up oil using the communication gap can also provide sufficient hydraulic oil for the second adjustment groove 22 and the third adjustment groove 23.

[0031] An engineering vehicle includes a motor with a magneto-electric induction speed change function having the above technical features. The speed change structure is simple and can perform speed change stably.

[0032] The above has introduced in detail a motor with a magneto-electric induction speed change function provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A motor with magnetoelectric induction variable speed function, comprising a motor front cover, a motor rear cover, a stator and a rotor assembly connected to a wheel shaft. A plurality of plunger assemblies that can move radially are arranged on the periphery of the rotor assembly, and it is characterized in that A hydraulic oil inlet passage and a hydraulic oil discharge passage are provided inside the motor rear cover. A distribution shaft is also provided inside the motor rear cover. An adjustment passage is provided inside the distribution shaft. A valve core is provided inside the adjustment passage. A plurality of passage adjustment grooves are provided on the inner wall of the adjustment passage. A plurality of valve core adjustment grooves are provided around the outer periphery of the valve core. The passage adjustment grooves communicate with the rotor assembly, the hydraulic oil inlet passage, and the hydraulic oil discharge passage. The movement of the valve core controls the disconnection or connection of the passage adjustment grooves and the valve core adjustment grooves. The valve core is made of a magnetic material. An electromagnet is provided on one side of the valve core. A return spring is provided between the electromagnet and the valve core. The valve core is pushed to move under the dual action of the electromagnet and the return spring; the valve core adjustment groove is an annular groove surrounding the outside of the valve core; on both sides of the valve core adjustment groove are valve core side walls, and buffer grooves are provided on the valve core side walls, and the buffer grooves communicate with one side of the valve core adjustment groove; The passage adjustment grooves include a first adjustment groove, a second adjustment groove, a third adjustment groove, and a fourth adjustment groove. The hydraulic oil inlet passage is connected to the fourth adjustment groove, and the hydraulic oil discharge passage is connected to the first adjustment groove; in the normal state, the first adjustment groove and the second adjustment groove are connected, the third adjustment groove and the fourth adjustment groove are connected, the second adjustment groove and the third adjustment groove are disconnected, and high-pressure hydraulic oil flows in the pipelines corresponding to the first adjustment groove, the second adjustment groove, the third adjustment groove, and the fourth adjustment groove; after the valve core moves, the first adjustment groove and the second adjustment groove are disconnected, the third adjustment groove and the fourth adjustment groove are disconnected, there is no longer high-pressure hydraulic oil in the pipelines corresponding to the second adjustment groove and the third adjustment groove, and high-pressure hydraulic oil continuously exists in the pipelines corresponding to the first adjustment groove and the fourth adjustment groove, and the number of hydraulic oils that can be introduced into the hydraulic oil management decreases, resulting in an increase in the speed of the motor; There are two valve core adjustment grooves, and there are four buffer grooves which are respectively arranged on both sides of the valve core adjustment grooves; An oil replenishing valve core is provided inside the valve core. After the valve core moves, the oil replenishing valve core is used to connect the first adjustment groove, the second adjustment groove, and the third adjustment groove, or to connect the second adjustment groove, the third adjustment groove, and the fourth adjustment groove; The oil replenishing valve core includes a valve body. The valve body can move left and right in the valve cavity. The valve body includes two oil replenishing channel components. Each oil replenishing channel component includes two longitudinal pipelines and one transverse pipeline. The transverse pipeline is arranged in the middle of the longitudinal pipelines. The transverse pipeline and the longitudinal pipelines form an I-shaped structure. The outer end of the transverse pipeline communicates with the valve cavity. The two oil replenishing channel components are symmetrically arranged on both sides of the valve body; when the oil replenishing valve core is on the left, it connects the first adjustment groove, the second adjustment groove, and the third adjustment groove, and when the oil replenishing valve core is on the right, it connects the second adjustment groove, the third adjustment groove, and the fourth adjustment groove; Channels extending outward to the valve cavity are provided at the upper port and the lower port of the longitudinal pipeline closer to the outside; Two valve core adjustment grooves are provided on the valve core. The two valve core adjustment grooves and the side wall of the valve core are respectively connected to four groups of valve core channels. The four groups of valve core channels correspond to four longitudinal pipelines; The four groups of valve core channels are respectively the first group of valve core channels, the second group of valve core channels, the third group of valve core channels and the fourth group of valve core channels. The two valve core adjusting grooves are respectively the first valve core adjusting groove and the second valve core adjusting groove. The first group of valve core channels communicates with the first valve core adjusting groove. The second group of valve core channels communicates with the side wall of the valve core. The third group of valve core channels communicates with the second valve core adjusting groove. The fourth group of valve core channels communicates with the side wall of the valve core; When the oil replenishing valve core is located on the right side, there is a communication gap between the inner longitudinal pipe of the right oil replenishing channel assembly and the third group of valve core channels.

2. An engineering vehicle, characterized in that It includes a motor with a magnetoelectric induction speed change function described in claim 1.

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