阅读说明：本技术 一种带中置式液冷电涡流缓速器的挂车车轴 (Trailer axle with central liquid cooling eddy current retarder ) 是由 纪建奕 纪奕春 杨朝会 王建 刘宗强 马长城 韩振东 纪国清 纪文涛 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种带中置式液冷电涡流缓速器的挂车车轴,包括中置式液冷电涡流缓速器、半桥壳总成、轮毂总成、制动器总成及轮边减速器,所述轮毂总成与轮边减速器固定连接,所述半桥壳总成与轮毂总成轴承链接,所述轮边减速器通过半桥壳总成与中置式液冷电涡流缓速器串联,所述半桥壳总成与制动器总成固定连接,所述制动器总成通过空气制动；其解决缓速器过热问题,集成于挂车车轴中央,实现车轮的缓速；研制大速比轮边减速装置对缓速器进行二次增扭,实现整桥大制动扭矩,降低缓速器定子质量；可在需要时实现连续缓速制动,进而拖拽半挂车,实现汽车列车制动,以提高制动能力,减少轮边制动器制动强度,取消制动鼓淋水装置,增加制动器摩擦片使用寿命,可适用于重载长下坡车型。(The invention discloses a trailer axle with a central liquid-cooled eddy current retarder, which comprises the central liquid-cooled eddy current retarder, a half-bridge shell assembly, a hub assembly, a brake assembly and a hub reduction gear, wherein the hub assembly is fixedly connected with the hub reduction gear; the retarder solves the problem of overheating of the retarder, is integrated in the center of a trailer axle and realizes retarding of wheels; a large-speed-ratio hub reduction gear is developed to carry out secondary torque increase on the retarder, so that the whole bridge large braking torque is realized, and the stator quality of the retarder is reduced; the brake device can realize continuous slow braking when needed, further drag the semitrailer, realize the braking of the automobile train, improve the braking capability, reduce the braking strength of the wheel brake, cancel the brake drum water spray device, prolong the service life of the brake friction plate, and is suitable for heavy-load long downhill vehicle types.)

1. A trailer axle with a central liquid-cooled eddy current retarder comprises the central liquid-cooled eddy current retarder, a half-bridge shell assembly, a hub assembly, a brake assembly and a hub reduction gear, and is characterized in that the hub assembly is fixedly connected with the hub reduction gear, the half-bridge shell assembly is in bearing connection with the hub assembly, the hub reduction gear is connected with the central liquid-cooled eddy current retarder in series through the half-bridge shell assembly, the half-bridge shell assembly is fixedly connected with the brake assembly, and the brake assembly is braked through air;

the central liquid cooling eddy current retarder comprises a stator, a coil and a rotor which are positioned inside the stator and an integrally formed double water channel structure, wherein petal weight reduction grooves are formed in flange surfaces at two ends of the stator.

2. The trailer axle with the central liquid cooling eddy current retarder according to claim 1, wherein the half axle housing assembly comprises a half axle housing body, a plate spring base plate, a plate spring pressing plate, a brake connecting flange, a retarder connecting flange and a hub axle tube, the half axle housing body, the plate spring base plate, the plate spring pressing plate, the brake connecting flange, the retarder connecting flange and the hub axle tube are integrally formed, the half axle housing assembly is connected with a bearing of the hub assembly through the hub axle tube, and the half axle housing assembly is fixedly connected with the brake assembly through the brake connecting flange.

3. The trailer axle with a centrally mounted liquid-cooled eddy current retarder as claimed in claim 2, wherein the axle housing body is provided with an oil filling hole and an oil drain hole, the breather plug is fastened to the oil filling hole through threads, and the magnetic plug screw is fastened to the oil drain hole through threads.

4. A trailer axle with a centrally mounted liquid cooled eddy current retarder as claimed in claim 3, wherein the bell mouth of the axle housing body is provided with an electric motor, and the electric motor is fixedly connected with the rotor through bolts.

5. The trailer axle with a centrally mounted liquid cooled eddy current retarder as claimed in claim 3, wherein the connecting surfaces of the brake connecting flange and the retarder connecting flange are provided with petal weight reduction grooves.

6. The trailer axle with the centrally-mounted liquid-cooled eddy current retarder according to claim 1, wherein the hub reduction gear comprises a hub reduction gear shell, a planet gear shaft and a sun gear, and the hub reduction gear shell is fixedly connected with a brake drum of the hub assembly; the hub reduction gear shell fixes the planet gear in the hub reduction gear shell planet carrier through the planet gear shaft, and the planet gear is matched with the sun gear.

7. The trailer axle with a centrally mounted liquid cooled eddy current retarder of claim 6, wherein the rotational speed ratio of the wheel hub reduction gear is 3.947 ~ 6.5.5.

8. The control system of the trailer axle with the central liquid-cooled eddy current retarder according to any one of claims 1 to 7, wherein the control system comprises an operating rod, a control box and a temperature sensor, and when the trailer is braked, the operating rod works to transmit signals to the central liquid-cooled eddy current retarder through the control box so as to realize the braking of the whole trailer.

9. The control system of the trailer axle with the central-positioned liquid-cooled eddy current retarder according to claim 8, further comprising a liquid-cooled circulating system, wherein the liquid-cooled circulating system is composed of a stator with a double-water-channel structure, a water pump, a heat dissipation water tank and an expansion water tank; when the central liquid cooling eddy current retarder works, the stator containing the double-water-channel structure generates a large amount of heat, the temperature sensor transmits signals to the control box, the control water pump circulates cooling liquid of the expansion water tank to the heat dissipation water tank, and the heat dissipation water tank discharges the heat through air cooling.

Technical Field

The invention relates to the technical field of automobile auxiliary braking, in particular to a trailer axle with a central liquid cooling eddy current retarder.

Background

For semi-trailer trains, the brakes are basically realized by friction between a friction plate and a brake drum. Because the carrying weight of the transport vehicle is large, when the transport vehicle is continuously braked for a long time on a long downhill or in a mountain area, the friction plate is overheated, the braking efficiency is reduced, and even the tragedies that the vehicle brake fails and the vehicle is destroyed and casualties occur.

At present, most semi-trailer trains still adopt a method of cooling the brake by water sprayed from a water tank, although the braking efficiency is temporarily improved, the service life of the brake is shortened, a brake drum is easy to burst, particularly, the road surface is frozen in winter, the road surface adhesion coefficient is reduced, and the safety of the following vehicles is seriously influenced.

The retarder belongs to the field of auxiliary braking, and the commercial retarders comprise eddy current retarders and hydraulic retarders; the retarber mainly installs in gearbox or transaxle differential package front end, has increased gearbox or axle cantilever, and the structure is complicated, and it is big to arrange the influence to the whole car.

And if the retarder is arranged on the tractor to realize the braking of the tractor, the trailer with huge mass does not brake at the moment, and still advances according to the original speed, so that mutual force of the ejection effect is generated at the towing connection, and dangers such as tail flicking, side turning and the like are easy to occur.

The eddy current retarder has the characteristics of obvious low-speed braking effect and quick response time, is suitable for working conditions of long downhill and mountainous areas, but the torque generated by eddy current has a direct relation with the stator volume of the eddy current retarder, so that the retarder stator meeting the downhill requirement of a large-scale heavy-duty vehicle is very heavy, the traditional air-cooled eddy current retarder has serious heat fading, the braking torque is reduced by 50 percent within 2 minutes, and the downhill requirement of the large-scale heavy-duty vehicle cannot be met.

The notice number is: CN 107516985A discloses an electromagnetism liquid cooling retarber of bridge type, stator inner water course is the cavity that rotor support and stator formed, and is not integrative structure yet, has the risk of revealing, and the oil pocket that stator and left and right flange axle constitute only has an oil inlet, and the oil drain is inconvenient, and the cavity is in the stator, and the stator generates heat and arouses that the pressure is too high in the oil pocket, has oil leak, the risk of bleeding.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a trailer axle with a central liquid-cooled eddy current retarder, which solves the problem of overheating of the retarder, is integrated in the center of the trailer axle, develops a high-speed-ratio hub reduction gear to carry out secondary speed-increasing and retarding braking on the retarder, further pulls a semitrailer, realizes braking of an automobile train, can continuously reduce the braking strength of the hub brake when needed, cancels a brake drum water spraying device, prolongs the service life of a brake friction plate, and is suitable for heavy-load long downhill vehicle models.

In order to achieve the purpose, the invention provides the following technical scheme: a trailer axle with a central liquid-cooled eddy current retarder comprises the central liquid-cooled eddy current retarder, a half-bridge shell assembly, a hub assembly, a brake assembly and a hub reduction gear, wherein the hub assembly is fixedly connected with the hub reduction gear;

the central liquid cooling eddy current retarder comprises a stator, a coil and a rotor which are positioned inside the stator and an integrally formed double water channel structure, wherein petal weight reduction grooves are formed in flange surfaces at two ends of the stator.

Further, half-bridge shell assembly includes half-bridge shell body, leaf spring backing plate, leaf spring clamp plate, stopper flange, retarber flange and wheel hub central siphon, half-bridge shell body, leaf spring backing plate, leaf spring clamp plate, stopper flange, retarber flange and wheel hub central siphon integrated into one piece, half axle housing assembly passes through the wheel hub central siphon and links with wheel hub assembly bearing, half axle housing assembly passes through stopper flange and stopper assembly fixed connection.

Furthermore, be provided with tank filler sleeve and oil drain hole on the half-axle housing body, the breather plug passes through the screw-thread fastening at the tank filler sleeve, and the magnetism plug screw passes through the screw-thread fastening at the oil drain hole.

Further, the horn mouth of half axle housing body is provided with the motor, the motor passes through bolt fixed connection with the rotor.

Furthermore, petal subtracts heavy groove all is provided with to stopper flange and retarber flange's connection face.

Further, the hub reduction gear comprises a hub reduction gear shell, a planet gear shaft and a sun gear, wherein the hub reduction gear shell is fixedly connected with a brake drum of the hub assembly; the hub reduction gear shell fixes the planet gear in the hub reduction gear shell planet carrier through the planet gear shaft, and the planet gear is matched with the sun gear.

Further, the rotation speed ratio of the hub reduction gear is 3.947 ~ 6.5.5.

The utility model provides a control system of trailer axletree of formula liquid cooling eddy current retarder in area, control system includes action bars, control box and temperature sensor, and when the car braking, action bars work and pass through the control box with signal transfer for formula liquid cooling eddy current retarder in the middle of, realize whole car braking.

The water cooling system comprises a stator with a double-water-channel structure, a water pump, a heat dissipation water tank and an expansion water tank; when the central liquid cooling eddy current retarder works, the stator containing the double-water-channel structure generates a large amount of heat, the temperature sensor transmits signals to the control box, the control water pump circulates cooling liquid of the expansion water tank to the heat dissipation water tank, and the heat dissipation water tank discharges the heat through air cooling.

The invention has the following beneficial effects:

1. the double-water-channel structure integrally formed in the stator does not need welding, simplifies the process, ensures the tightness of the water channel, and realizes weight reduction by arranging the petal weight reduction grooves on the flange surfaces at the two ends of the stator.

2. The speed ratio of the wheel-side speed reducer is designed to be 3.947-6.5, secondary speed increasing is realized on the rotor through the wheel-side speed reducer, and the higher the rotating speed of the eddy current retarder is, the larger the braking torque is.

3. The half-bridge shell is integrally cast and formed, the structural strength is high, the half-bridge shell is provided with the oil filling hole, the oil drain hole and the upper oil passage and the lower oil passage, the maintenance is convenient, and the ventilation plug is arranged at the oil filling hole, so that the influence of temperature on the internal pressure of the axle shell is avoided.

4. The invention designs a permanent magnet brushless motor, converts the kinetic energy of an axle into electric energy, and supplies power to the excitation coil of the axle retarder and a main vehicle, thereby achieving the purpose of saving energy. The invention has the functions of bearing, braking, retarding and energy recovery, is arranged at the first shaft position of the semitrailer, can realize continuous retarding braking when needed, further pulls the semitrailer and realizes braking of an automobile train, and compared with a retarder scheme arranged on a tractor, the scheme has relatively low cost and high safety.

Drawings

FIG. 1 is an overall system diagram of the present invention;

FIG. 2 is an overall profile view of the present invention;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a schematic view of the stator of the present invention being sliced;

FIG. 5 is a schematic cut-away view of the half-bridge shell assembly of the present invention;

in the figure: 1-hub reduction gear, 1-2-hub assembly, 1-3-half-bridge shell assembly, 1-4-middle-positioned liquid cooling eddy current retarder and 1-5-brake assembly; 2-1-trailer axle, 2-temperature sensor, 2-3-radiating water tank, 2-4-expansion water tank, 2-5-control box, 2-6-water pump, 2-7-operating lever; 3-1-stator, 3-2-coil, 3-rotor, 3-4-motor, 3-5-half-bridge shell body, 3-6-breather plug, 3-7-half shaft, 3-8-magnetic screw plug, 3-9-bearing, 3-11-brake drum, 3-13-hub reducer shell, 3-14-planet wheel, 3-15-needle bearing, 3-16-planet wheel shaft and 3-17-sun wheel; 4-1-petal weight reduction groove, 4-2-outer water channel, 4-3-inner water channel; 5-1-retarder connecting flange, 5-2-plate spring backing plate, 5-3-hub axle tube, 5-4-brake connecting flange and 5-plate spring pressing plate.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.