WO2015149296A1 - 一种转向电机的双油道结构 - Google Patents

一种转向电机的双油道结构 Download PDF

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Publication number
WO2015149296A1
WO2015149296A1 PCT/CN2014/074600 CN2014074600W WO2015149296A1 WO 2015149296 A1 WO2015149296 A1 WO 2015149296A1 CN 2014074600 W CN2014074600 W CN 2014074600W WO 2015149296 A1 WO2015149296 A1 WO 2015149296A1
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WO
WIPO (PCT)
Prior art keywords
oil
cavity
valve
oil passage
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/074600
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English (en)
French (fr)
Inventor
龚蜀刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Zhixing Single-Axle Two-Wheeled Driving Technology Co Ltd
Original Assignee
Shenzhen Zhixing Single-Axle Two-Wheeled Driving Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Zhixing Single-Axle Two-Wheeled Driving Technology Co Ltd filed Critical Shenzhen Zhixing Single-Axle Two-Wheeled Driving Technology Co Ltd
Priority to CN201480076947.9A priority Critical patent/CN106488868B/zh
Priority to PL14887872T priority patent/PL3127778T3/pl
Priority to EP14887872.1A priority patent/EP3127778B1/en
Priority to US15/300,691 priority patent/US10348155B2/en
Priority to KR1020167028405A priority patent/KR102128146B1/ko
Priority to JP2016559975A priority patent/JP6386076B2/ja
Priority to ES14887872T priority patent/ES2750554T3/es
Publication of WO2015149296A1 publication Critical patent/WO2015149296A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0418—Electric motor acting on road wheel carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/02—Steering linkage; Stub axles or their mountings for pivoted bogies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H02K7/16—Structural association with mechanical loads, e.g. with hand-held machine tools or fans for operation above the critical speed of vibration of the rotating parts

Definitions

  • the invention relates to the technical field of electric motor oil passages, in particular to a double oil passage structure of a steering motor.
  • the steering system of the automobile has also been rapidly improved, and the electric power steering system is the development direction of the automobile steering system.
  • the system provides steering assistance directly from the steering motor, eliminating some of the components necessary in traditional hydraulic power steering systems, saving energy and protecting the environment.
  • the system is easy to adjust, flexible to assemble, and in a variety of situations.
  • the steering assist can be provided underneath.
  • the torque sensor detects the steering of the steering wheel and the magnitude of the torque, and sends the voltage signal to the electronic control unit.
  • the electronic control unit detects the torque voltage signal and the direction of rotation according to the torque sensor. And the vehicle speed signal, etc., an instruction is given to the steering motor controller to cause the steering motor to output a steering assist torque of a corresponding magnitude and direction to generate auxiliary power; when the vehicle is not turning, the electronic control unit does not issue an instruction to the motor controller, the motor Not working.
  • the object of the present invention is to provide a double oil passage structure of a steering motor, which aims to solve the problem that each oil passage inside the steering motor exists in the prior art, and adopts a separate design to occupy a large internal space of the steering motor, thereby increasing Turning to the volume of the motor, resulting in waste of resources and increased production costs.
  • the technical solution provided by the present invention is a double oil passage structure of a steering motor, comprising an upper cover buffer assembly and a oil separation plate, the oil separation plate being disposed under the upper cover buffer assembly, and the upper cover
  • the buffer assembly is closed to form a closed axial cavity;
  • the oil separation plate is provided with an oil passage arranged in a radial direction and communicating with the axial cavity, and the oil separation plate is provided with an oil inlet.
  • the oil separation discs respectively extend upwardly and downwardly with a hollow column having an inner cavity arranged in the axial direction, and an inner wall of the hollow column is provided with a oil passage connecting the oil passage;
  • An inner side of the hollow column is provided with a reversing valve having a valve core, and an inner side wall of the hollow column forms a first radial cavity with an outer wall of the reversing valve, and a pin is embedded in the first radial cavity
  • the first radial cavity is separated by the pin to form mutually independent oil inlet oil inlet cavity and oil separation plate oil discharge cavity, and the oil inlet oil inlet cavity is connected with the oil inlet port
  • the oil discharge oil cavity of the oil separation plate is in communication with the axial cavity;
  • the upper part of the side wall of the valve cavity is provided with a reversing valve oil passage arranged radially in the radial direction, and the oil passage of the reversing valve is disposed below the axial direction of the oil passage;
  • the outer wall of the upper end of the valve core is provided with a semi-circular oil passage groove having a semicircular cross section, and the oil passage ring communicates with the oil inlet oil inlet cavity and the oil discharge oil outlet cavity;
  • An outer wall of the lower end of the valve core and a lower side wall of the valve cavity form a second radial cavity, and a lower portion of the valve cavity is provided with an oil outlet, and the oil outlet is in communication with the second radial cavity.
  • the upper cover buffer assembly includes an upper cover and a butterfly-shaped elastic diaphragm, the elastic diaphragm is embedded in the inner lower edge of the upper cover and is sealed with the oil separation plate by a fastener cover.
  • a cylinder assembly is disposed under the oil separation disc, and the cylinder assembly includes an oil cylinder abutting against a lower surface of the oil separation disc and having both ends open, and is disposed in the cylinder chamber and has a fixed connection at an upper end.
  • a fuel bladder, and a piston fixedly coupled to the lower end of the elastic oil bladder and axially movable within the cylinder.
  • the elastic oil bladder has an opening at an upper end thereof, and an edge thereof is fixedly connected to the oil cylinder, and the oil separation disc is provided with a damping hole that communicates with the axial cavity and the elastic oil bladder, respectively.
  • the diameter of the orifice is smaller than the diameter of the opening of the upper end of the elastic oil bladder.
  • the reversing valve comprises a winding coil disposed under the oil separation disc and sleeved on an outer circumference of the valve chamber.
  • a center of the valve core is provided with a circular through hole
  • the outer wall ring of the valve core is provided with a plurality of open ring grooves, and an O-ring is embedded in the open ring groove.
  • the bottom end of the valve core has a valve tail
  • the valve tail extends downward to the bottom end of the valve cavity
  • the inner wall and the outer wall of the valve tail are annularly provided with an open slot, the opening A hollow bellows is embedded in the slot, and the hollow bellows extends downwardly from the bottom end of the spool.
  • the inner wall of the top end of the hollow column is sleeved with a deep groove ball bearing, and the inner groove of the deep groove ball bearing is provided with a hollow sleeve, and the inner diameter of the hollow sleeve is smaller than the circular through hole opened on the valve core Inner diameter.
  • a pipeline jacket is disposed in the hollow casing, and the pipeline jacket extends downward along the inner wall of the hollow casing and extends beyond the hollow bellows.
  • the double oil passage structure of the steering motor passes through the valve core of the reversing valve and the valve cavity thereof, and enters the oil cavity from the oil separation plate, passes through the oil ring groove on the valve core, and the oil is discharged from the oil distribution plate.
  • the cavity enters the axial cavity to form an oil passage;
  • the oil inlet cavity from the oil separation plate passes through the oil passage hole on the reversing valve, enters the second radial cavity, and communicates with the oil outlet to form another An oil passage.
  • the oil passage is divided into two branch oil passages which do not interfere with each other, which reduces the occupied space, thereby reducing the volume of the steering motor, saving resources and saving cost.
  • FIG. 1 is a schematic cross-sectional view showing a dual oil passage structure assembled to a steering motor according to an embodiment of the present invention
  • Figure 2 is a partial enlarged view of Figure 1;
  • Figure 3 is a partial enlarged view of the portion of the oil separation plate of Figure 1;
  • Figure 4 is a partially enlarged schematic view of the portion of the reversing valve of Figure 1;
  • Figure 5 is a cross-sectional view taken along the line A-A of Figure 1;
  • Figure 6 is a cross-sectional view taken along the line B-B of Figure 1.
  • the embodiment provides a double oil passage structure of a steering motor, and the double oil passage structure is disposed inside the steering motor, and includes: an upper cover buffer assembly 1 and a oil separation plate 2, and the oil separation plate 2 is disposed on the upper cover buffer Below the assembly 1, and the upper cover buffer assembly 1 and the oil separation plate 2 are closed to form a closed axial cavity 4; the oil separation plate 2 is provided with hollow columns 21 extending upward and downward and axially respectively.
  • the hollow column 21 has an inner cavity.
  • the oil distribution plate 2 is provided with an oil inlet port 22, and a oil passage 23 arranged in the radial direction.
  • the inner wall of the hollow column 21 is provided with a oil passage through the oil passage 23.
  • the oil passage 23 communicates with the inner cavity of the hollow column 21 through the oil passage, and the oil passage 23 also communicates with the axial cavity 4; the inner side of the hollow column 21 is provided with the reversing valve 3, and the reversing valve 3 has the valve core 31 And a valve chamber 32; the inner wall of the hollow column 21 and the outer wall of the valve chamber 32 form a first radial cavity, in which the pin 7 is embedded, and the first radial cavity is separated by the pin 7 to form independent
  • the oil pan oil discharge cavity 25 communicates with the axial cavity 4; the upper part of the side wall of the valve cavity 32 is provided with a reversing valve oil passage 33 which is arranged in the radial direction, and the reversing valve oil passage 33 is axially below.
  • a lubricating oil hole 34 arranged in a radial direction; in addition, an upper ring of the outer wall of the valve core 31 is provided with a semi-circular oil passage groove 35 having a semicircular cross section, and the oil ring groove 35 respectively communicates with the oil inlet oil inlet cavity 24 and a second radial cavity 36 is formed between the outer wall of the lower end of the valve core 31 and the inner wall of the lower portion of the valve cavity 32.
  • the lower part of the valve cavity 32 is provided with an oil outlet 37, and the oil outlet 37 and the first The two radial cavities 36 are in communication.
  • the oil inlet oil inlet cavity 24 and the reversing valve oil passage 33, the oil ring groove 35, the oil discharge oil outlet cavity 25, and the axial cavity 4 constitute an oil passage.
  • the oil passage is used for oil supply and lift oil supply of the steering motor hydraulic damping system; the oil inlet oil inlet cavity 24 communicates with the oil passage hole 34, the second radial cavity 36, and the oil outlet 37, forming another An oil passage that is used to supply oil to the brakes of the steering motor.
  • the closed cover axial cavity 4 is formed by the upper cover buffer assembly 1 and the oil separation plate 2, and the oil distribution plate oil discharge cavity 25 communicating with the axial cavity 4, the reversing valve oil passage 33 passes through
  • the oil ring groove 35 communicates with the oil inlet oil inlet cavity 24;
  • the second radial cavity 36 communicates with the oil hole 34, the oil inlet oil inlet cavity 24, and the oil outlet 37; through the valve core 31
  • the valve chamber 32 moves up and down, and the oil ring groove 35 and the multi-channel O-ring 38 cooperate with the inner wall of the valve chamber 32 to realize the switching of the two oil passages without interference, and the design reduces the two oil passages.
  • the occupied space reduces the size of the steering motor, saves resources, and saves costs.
  • the upper cover buffer assembly 1 includes an upper cover 11 and an elastic diaphragm 12, wherein the elastic diaphragm 12 has a butterfly shape, and the elastic diaphragm 12 is embedded and fastened in the inner lower edge of the upper cover 11, and the oil separation plate 2 is
  • the structure is matched with the structure of the upper cover buffer assembly 1, and the two cover are combined to realize the sealed connection by the fastener.
  • the above-mentioned upper cover buffer assembly 1 and the above-mentioned oil separation are provided according to specific circumstances and actual needs.
  • the disk 2 can also be of other shapes.
  • a cylinder assembly 5 is disposed under the oil separation plate 2, and the cylinder assembly 5 includes an oil cylinder 51, an elastic oil bladder 52, and a piston 53.
  • the oil cylinder 51 is a hollow columnar structure with open ends, and the upper end of the oil cylinder 51 is The lower surface of the oil separation plate 2 abuts, and the elastic oil bladder 52 and the piston 53 are both disposed in the oil cylinder 51.
  • the elastic oil bladder 52 is a bladder-shaped elastic diaphragm with an open upper end, and the tail end of the elastic oil bladder 52 and the piston 53 The upper end is fixedly coupled and the piston 53 is axially movable within the cylinder 51.
  • An edge of the upper end of the elastic oil bladder 52 is fixedly connected to an inner wall of the upper end of the cylinder 51 to form a seal to the port of the oil cylinder 51, and an opening of the elastic oil bladder 52 is transmitted through the oil separation disc 2 and the axial cavity. 4 sealed and connected to form the oil passage.
  • a damping hole 26 is defined in the bottom surface of the oil separation plate 2, and the damping hole 26 is disposed opposite to the opening of the upper end of the elastic oil bladder 52.
  • the elastic oil bladder 52 is realized by the damping hole 26 and the axial cavity 4 described above.
  • the sealing communication is of course.
  • the elastic oil bladder 52 can also be in sealing communication with the axial cavity 4 by other means, such as pipe communication, or passage communication.
  • the diameter of the orifice 26 is smaller than the diameter of the opening of the elastic oil bladder 52.
  • the damping hole 26 also acts as a damping buffer. Of course, this is only one form of buffering. In other embodiments, other buffering forms may be used.
  • the directional control valve 3 is an electromagnetic directional control valve, and the directional control valve 3 further includes a winding coil 39.
  • the winding coil 39 is sleeved on the outer wall of the valve chamber 32, and the outer wall is provided with a shaft. To the positioning flange, the winding coil 39 is located below the hollow post 21 and above the outer wall of the valve cavity 32.
  • other types of reversing valves may be employed depending on the actual situation and needs.
  • a circular through hole is formed in the center of the valve body 31, and a plurality of split ring grooves are formed in the outer wall ring of the valve body 31, and an O-ring 38 is embedded in each of the split ring grooves.
  • the oil ring groove 35 and the oil passage 23 are staggered, and the switching valve oil passage 33 is blocked by the outer wall of the valve core 31.
  • the second radial cavity 36 passes through the oil hole 34 and the minute.
  • the oil pan inlet oil chamber 24 communicates, that is, the oil passage formed by the oil disc inlet oil chamber 24 and the second radial cavity 36 constitutes a passage, and the oil disc inlet oil chamber 24 and the axial cavity 4 are The oil passage formed by the elastic oil bladder 52 is blocked; when the winding coil 39 is energized, the valve core 31 is entirely moved downward, the oil passage groove 35 is in alignment with the oil passage 33, and the O-ring of the lower tapered surface of the valve core 31 is sealed.
  • the ring 38 presses the conical surface of the lower portion of the valve chamber 32, that is, the second radial cavity 36 is blocked, so that the oil inlet cavity 24 and the axial cavity 4 and the elastic oil bladder 52 form an oil passage. Forming the passage, at the same time, the oil passage formed by the oil inlet cavity 24 and the second radial cavity 36 is blocked; the switching of the two oil passages is realized by the switching of the reversing valve 3, and mutual Do not interfere.
  • the bottom end of the valve core 31 has a valve tail, and the valve tail extends downwardly from the bottom end of the valve chamber 32, and the inner wall and the outer wall of the valve tail are respectively provided with open grooves extending in the circumferential direction, and the open groove is embedded therein.
  • the inner wall of the hollow column 21 is sleeved with a deep groove ball bearing 8 , and the inner groove of the deep groove ball bearing 8 is provided with a hollow sleeve 9 , and the valve core 31 is provided with a circular through hole penetrating the upper and lower sides thereof, and the hollow sleeve 9 is The inner diameter is smaller than the inner diameter of the circular through hole.
  • the inner end of the inner wall of the hollow column 21 may also be sleeved with other types of bearings.
  • the hollow casing 9 is provided with a pipeline sheath 10 extending downward from the inner wall of the hollow casing 9 to the bottom end of the valve core 31 and extending into the hollow bellows 6.
  • the hollow bellows 6 and the hollow sleeve 9 serve to support and position the pipeline jacket 10; in the present embodiment, the pipeline jacket 10 is used to lay the hand brake cable.
  • the laying of the brake wire can be used in other ways, and the pipeline sheath 10 can also be used to lay other pipelines.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Fluid-Damping Devices (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Vibration Dampers (AREA)
  • Multiple-Way Valves (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

一种转向电机的双油道结构，包括上盖缓冲组件（1）和分油盘（2），两者盖合形成轴向型腔（4）；分油盘（2）中设有过油通道（23）、进油口（22）和中空柱（21），过油通道（23）与轴向型腔（4）连通，中空柱（21）内壁开设连通过油通道（23）的过油口；中空柱（21）内设含阀芯（31）的换向阀（3），中空柱（21）与换向阀（3）间形成第一径向型腔，该型腔被销钉（7）隔离成分油盘进油、出油型腔（24，25），前者与进油口（22）连通，后者与轴向型腔（4）连通；阀腔（32）侧壁上部设换向阀过油通道（33），其下方设过油孔（34）；阀芯（31）外壁环设过油环槽（35），并连通分油盘进油、出油型腔（24，25）；阀芯（31）下端外壁与阀腔（32）下部侧壁形成第二径向型腔（36），阀腔（32）下部开设有与第二径向型腔（36）连通的出油口（37）。上述双油道结构将油道分成互不干扰的两支油道，占用空间缩小，减小了电机体积。

Description

一种转向电机的双油道结构 技术领域
本发明涉及电动机油道的技术领域，尤其涉及一种转向电机的双油道结构。
 背景技术
随着汽车工业的不断发展，汽车的转向系统也得到飞速进步，而电动助力转向系统则是汽车转向系统的发展方向。该系统由转向电机直接提供转向助力，省去了传统液压动力转向系统中所必需的一些部件，既节省能量，又保护了环境；另外，该系统还具有调整简单、装配灵活以及在多种状况下都能提供转向助力的特点。
驾驶员在操纵方向盘进行转向时，转矩传感器检测到转向盘的转向以及转矩的大小，将电压信号输送到电子控制单元，电子控制单元根据转矩传感器检测到的转矩电压信号、转动方向和车速信号等，向转向电机控制器发出指令，使转向电机输出相应大小和方向的转向助力转矩，从而产生辅助动力；当汽车不转向时，电子控制单元不向电动机控制器发出指令，电动机不工作。
　　目前的转向电机常常内设有各种油道，比如，用于减震供油的油道、用于刹车供油的油道、用于举升供油的油道等等，但这些油道基本是采用单独设计和装配，各个油道之间彼此分隔，这样，过多的单独油道就占用了转向电机很多内部空间，这样导致转向电机内部的剩余使用空间相对缩小，为了避免该影响，往往增大转向电机的整体体积，既浪费资源，又增加了生产成本。
 技术问题
本发明的目的在于提供一种转向电机的双油道结构，旨在解决现有技术中，转向电机内部的各个油道存在，采用单独设计而占用转向电机较大的内部空间，而增大了转向电机体积，进而造成资源浪费、生产成本增加的缺陷。
 技术解决方案
本发明提供的技术方案是，一种转向电机的双油道结构，包括上盖缓冲组件和分油盘，所述分油盘置于所述上盖缓冲组件的下方，且与所述上盖缓冲组件盖合形成密闭的轴向型腔；所述分油盘中设有沿径向布置且与所述轴向型腔连通的过油通道，所述分油盘上设有进油口，所述分油盘分别向上和向下延伸有沿轴向布置的具有内腔的中空柱，所述中空柱的内壁上开设有连通所述过油通道的过油口；
　　所述中空柱内侧设有具有阀芯的换向阀，所述中空柱的内侧壁与所述换向阀的外壁形成第一径向型腔，所述第一径向型腔中嵌入有销钉，所述第一径向型腔被所述销钉隔离形成相互独立的分油盘进油型腔和分油盘出油型腔，所述分油盘进油型腔与所述进油口连通，所述分油盘出油型腔与所述轴向型腔连通；
　　所述阀腔侧壁上部开设有沿径向贯通布置的换向阀过油通道，所述换向阀过油通道轴向的下方开设有沿径向布置的过油孔；
　　所述阀芯上端的外壁上环设有截面呈半圆形的过油环槽，所述过油环槽连通所述分油盘进油型腔和所述分油盘出油型腔；
　　所述阀芯下端的外壁与所述阀腔下部侧壁形成第二径向型腔，所述阀腔下部开设有出油口，所述出油口与所述第二径向型腔连通。
　　进一步地，所述上盖缓冲组件包括上盖和呈蝶形状的弹性隔膜，所述弹性隔膜嵌入所述上盖内侧下缘且与所述分油盘通过紧固件盖合密封。
　　优选地，所述分油盘的下方设有油缸组件，所述油缸组件包括抵接于所述分油盘下表面且两端开口的油缸，置于所述油缸腔内且上端固定连接的弹性油囊，以及与所述弹性油囊下端固定连接且于所述油缸内轴向移动的活塞。
　　进一步地，所述弹性油囊的上端具有开口，其边缘与所述油缸固定连接，所述分油盘中设有分别连通所述轴向型腔及所述弹性油囊的阻尼孔。
　　进一步地，所述阻尼孔的孔径小于所述弹性油囊上端开口的口径。
　　优选地，所述换向阀包括置于所述分油盘下方且套设于所述阀腔外周的绕组线圈。
　　进一步地，所述阀芯中心开设有圆形通孔，所述阀芯外壁环设有多个开口环槽，所述开口环槽内嵌入有O型密封圈。
　　进一步地，所述阀芯的底端具有阀尾，所述阀尾向下延伸至所述阀腔的底端，且所述阀尾的内壁和外壁上均环设有开口槽，所述开口槽内嵌入有中空波纹管，所述中空波纹管向下延伸出所述阀芯底端。
　　进一步地，所述中空柱顶端的内壁套设有深沟球轴承，所述深沟球轴承内圈套设有中空套管，所述中空套管内径小于所述阀芯上开设的圆形通孔的内径。
　　进一步地，所述中空套管内设有管线护套，所述管线护套沿所述中空套管内壁向下延伸并超出所述中空波纹管。
 有益效果
本发明提供的转向电机的双油道结构，通过换向阀的阀芯与其阀腔的配合，从分油盘进油型腔，经过阀芯上的过油环槽，和分油盘出油型腔，进入轴向型腔，形成一条油道；从分油盘进油型腔，经过换向阀上的过油孔，进入第二径向型腔，并与出油口连通，形成另一条油道。通过换向阀的阀芯与其阀腔的配合，使油道分成互不干扰的两个分支油道，缩小了其占用的空间，进而减小了转向电机体积，节约资源，节省成本。
 附图说明
图1为本发明实施例提供的双油道结构装配于转向电机的剖面示意图；
　　图2为图1的局部放大示意图；
　　图3为图1中分油盘部分的局部放大示意图；
　　图4为图1中换向阀部分的局部放大示意图；
　　图5为图1中A-A剖切方向的剖切示意图；
　　图6为图1中B-B剖切方向的剖切示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
　　以下结合具体实施例对本发明的实现进行详细的描述。
　　如图1~6所示，为本发明提供的一个较佳实施例。
　　本实施例提供了一种转向电机的双油道结构，该双油道结构设置在转向电机的内部，其包括：上盖缓冲组件1和分油盘2，分油盘2设置在上盖缓冲组件1的下方，且上盖缓冲组件1与分油盘2盖合形成了密闭的轴向型腔4；分油盘2中设有分别向上和向下延伸且沿轴向布置的中空柱21，中空柱21具有内腔，同时，分油盘2中开设有进油口22，以及沿径向布置的过油通道23，中空柱21的内壁上开设有连通过油通道23的过油口，过油通道23通过过油口连通中空柱21的内腔，并且过油通道23还连通轴向型腔4；中空柱21的内侧设有换向阀3，换向阀3具有阀芯31和阀腔32；中空柱21的内壁与阀腔32外壁形成第一径向型腔，该第一径向型腔中嵌入有销钉7，第一径向型腔被销钉7隔离形成相互独立的分油盘进油型腔24和分油盘出油型腔25，其中，分油盘进油型腔24与进油口22连通，分油盘出油型腔25与轴向型腔4连通；阀腔32侧壁上部开设有沿径向贯通布置的换向阀过油通道33，换向阀过油通道33的轴向下方开设有沿径向布置的过油孔34；另外，阀芯31外壁的上部环设有截面呈半圆形的过油环槽35，该过油环槽35分别连通分油盘进油型腔24和分油盘出油型腔25；阀芯31下端的外壁与阀腔32下部内壁之间形成第二径向型腔36，阀腔32下部开设有出油口37，该出油口37与第二径向型腔36连通。
　　如上所述，分油盘进油型腔24与换向阀过油通道33、过油环槽35、分油盘出油型腔25，以及轴向型腔4连通构成了一条油道，该油道用于转向电机液压减震系统供油和举升供油；分油盘进油型腔24与过油孔34、第二径向型腔36，以及出油口37连通，构成了另一条油道，此油道用于转向电机的刹车供油。通过阀芯31在阀腔32内的上下移动，以及过油环槽35、多个O形密封圈38与阀腔32内壁的配合，实现了上述两条油道互不干扰的切换。
　　采用上述的双油道结构运用于转向电机，具有如下特点：
　　通过上盖缓冲组件1与分油盘2盖合形成了密闭的轴向型腔4，以及与轴向型腔4连通的分油盘出油型腔25，换向阀过油通道33，通过过油环槽35与分油盘进油型腔24连通；第二径向型腔36与过油孔34、分油盘进油型腔24连通以及出油口37连通；通过阀芯31在阀腔32中上下移动，以及过油环槽35和多道O形密封圈38与阀腔32内壁的配合，实现了上述两条油道互不干扰的切换，该设计缩小了两条油道所占用的空间，进而减小了转向电机体积，节约资源，节省成本。
　　本实施例中，上述上盖缓冲组件1包括上盖11和弹性隔膜12，其中，弹性隔膜12呈蝶形状，该弹性隔膜12嵌入上盖11内侧下缘密封紧固，上述分油盘2的结构与上盖缓冲组件1的结构相匹配对应，两者盖合并通过紧固件实现密封连接，当然，在其他实施例中，根据具体情况和实际需要，上述上盖缓冲组件1和上述分油盘2也可以为其他形状的结构。
　　本实施例中，上述分油盘2的下方设置有油缸组件5，该油缸组件5包括油缸51、弹性油囊52和活塞53，油缸51为两端开口的中空柱状结构，油缸51的上端与分油盘2的下表面抵接，弹性油囊52和活塞53则均设置在该油缸51中，弹性油囊52为上端开口的囊状弹性隔膜，弹性油囊52的尾端与活塞53的上端固定连接，该活塞53可以在油缸51内轴向移动。
　　上述弹性油囊52上端开口的边缘与上述油缸51上端开口的内壁固定连接，从而形成对油缸51端口的密封，并且，弹性油囊52的开口透过上述分油盘2与上述轴向型腔4密封连通，从而构成了油道。
　　上述分油盘2的底面上开设有阻尼孔26，该阻尼孔26正对上述弹性油囊52上端的开口设置，这样，弹性油囊52通过该阻尼孔26实现了与上述轴向型腔4的密封连通，当然，在其他实施例中，弹性油囊52也可以通过其他的方式与上述轴向型腔4密封连通，比如管道连通，或者通道连通等。
　　并且，上述阻尼孔26的孔径小于弹性油囊52开口的口径，这样，当弹性油囊52受到上述活塞53压迫时，其内的油液被挤压而通过阻尼孔26进入上述轴向型腔4，该阻尼孔26也就起到了阻尼缓冲的作用，当然，这只是缓冲的一种形式，在其他实施例中，也可以采用其他的缓冲形式。
　　本实施例中，上述的换向阀3采用的是电磁换向阀，该换向阀3还包括绕组线圈39；具体地，绕组线圈39套设在阀腔32外壁，该外壁上设有轴向定位凸缘，绕组线圈39且位于中空柱21的下方和阀腔32外壁定位凸缘的上方。当然，在其他实施例中，根据实际情况和需要，也可以采用其他类型的换向阀。
　　上述阀芯31的中心开设有圆形通孔，阀芯31的外壁环设有多个开口环槽，各个开口环槽内嵌入有O型密封圈38。
　　初始状态下，过油环槽35与过油通道23错开，换向阀过油通道33被阀芯31的外壁所封堵，此时，第二径向型腔36通过过油孔34与分油盘进油型腔24连通，即分油盘进油型腔24与第二径向型腔36形成的油道构成通路，且分油盘进油型腔24与上述轴向型腔4以及弹性油囊52形成的油道被阻断；当绕组线圈39通电时，阀芯31整体下移，过油环槽35与过油通道33对准连通，阀芯31下部锥面的O型密封圈38压紧了阀腔32下部的圆锥面，即第二径向型腔36被封堵，这样，分油盘进油型腔24与轴向型腔4以及弹性油囊52形成的油道构成通路，同时，分油盘进油型腔24与第二径向型腔36形成的油道被阻断；通过换向阀3的换向切换作用实现了两条油道的切换，且互不干扰。
　　本实施例中，阀芯31的底端具有阀尾，阀尾向下延伸出阀腔32的底端，且阀尾的内壁和外壁均开设有圆周方向贯通的开口槽，该开口槽内嵌入有中空波纹管6，中空波纹管6向下延伸出阀芯31的底端。
　　上述中空柱21内壁顶端套设有深沟球轴承8，深沟球轴承8内圈套设有中空套管9，上述阀芯31中开设有贯通其上下的圆形通孔，中空套管9的内径小于圆形通孔的内径，在其他实施例中，上述中空柱21内壁顶端也可以套设其他类型轴承。
　　具体地，上述中空套管9内设有管线护套10，管线护套10沿中空套管9内壁向下延伸出阀芯31底端，并伸入上述中空波纹管6内。中空波纹管6和中空套管9对管线护套10起到支承和定位的作用；在本实施例中，管线护套10用于套设手刹车拉线。当然，在其他实施例中，手刹车拉线的铺设也可以采用其他方式，管线护套10也可以用作铺设其他管线。
　　上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种转向电机的双油道结构，其特征在于，包括上盖缓冲组件和分油盘，所述分油盘置于所述上盖缓冲组件下方，且与所述上盖缓冲组件盖合形成密闭的轴向型腔；所述分油盘中设有沿径向布置且与所述轴向型腔连通的过油通道，所述分油盘上设有进油口，所述分油盘中分别向上和向下延伸有沿轴向布置的具有内腔的中空柱，所述中空柱的内壁上开设有连通所述过油通道的过油口；
    　　所述中空柱内侧设有具有阀芯的换向阀，所述中空柱的内侧壁与所述换向阀的外壁形成第一径向型腔，所述第一径向型腔中嵌入有销钉，所述第一径向型腔被所述销钉隔离形成相互独立的分油盘进油型腔和分油盘出油型腔，所述分油盘进油型腔与所述进油口连通，所述分油盘出油型腔与所述轴向型腔连通；
    　　所述阀腔侧壁上部开设有沿径向贯通布置的换向阀过油通道，所述换向阀过油通道轴向的下方开设有沿径向布置的过油孔；
    　　所述阀芯上端的外壁上环设有截面呈半圆形的过油环槽，所述过油环槽连通所述分油盘进油型腔和所述分油盘出油型腔；
    　　所述阀芯下端的外壁与所述阀腔下部侧壁形成第二径向型腔，所述阀腔下部开设有出油口，所述出油口与所述第二径向型腔连通。
  2. 　　如权利要求1所述的转向电机的双油道结构，其特征在于，所述上盖缓冲组件包括上盖和呈蝶形状的弹性隔膜，所述弹性隔膜嵌入所述上盖内侧下缘且与所述分油盘通过紧固件盖合密封。
  3. 　　如权利要求1所述的转向电机的双油道结构，其特征在于，所述分油盘的下方设有油缸组件，所述油缸组件包括抵接于所述分油盘下表面且两端开口的油缸，置于所述油缸腔内且上端固定连接的弹性油囊，以及与所述弹性油囊下端固定连接且于所述油缸内轴向移动的活塞。
  4. 　　如权利要求3所述的转向电机的双油道结构，其特征在于，所述弹性油囊的上端具有开口，其边缘与所述油缸固定连接，所述分油盘中设有分别连通所述轴向型腔及所述弹性油囊的阻尼孔。
  5. 如权利要求4所述的转向电机的双油道结构，其特征在于，所述阻尼孔的孔径小于所述弹性油囊上端开口的口径。
  6. 如权利要求1~5任一项所述的转向电机的双油道结构，其特征在于，所述换向阀还包括置于所述分油盘下方且套设于所述阀腔外周的绕组线圈。
  7. 如权利要求6所述的转向电机的双油道结构，其特征在于，所述阀芯中心开设有圆形通孔，所述阀芯外壁环设有多个开口环槽，所述开口环槽内嵌入有O型密封圈。
  8. 如权利要求6所述的转向电机的双油道结构，其特征在于，所述阀芯的底端具有阀尾，所述阀尾向下延伸至所述阀腔的底端，且所述阀尾的内壁和外壁上均环设有开口槽，所述开口槽内嵌入有中空波纹管，所述中空波纹管向下延伸出所述阀芯底端。
  9. 如权利要求8所述的转向电机的双油道结构，其特征在于，所述中空柱顶端的内壁套设有深沟球轴承，所述深沟球轴承内圈套设有中空套管，所述中空套管内径小于所述阀芯上开设的圆形通孔的内径。
  10. 如权利要求9所述的转向电机的双油道结构，其特征在于，所述中空套管内设有管线护套，所述管线护套沿所述中空套管内壁向下延伸并超出所述中空波纹管。
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