CN2661487Y - Power plant of electric motor coach - Google Patents

Abstract

The utility model discloses a power device for electric city buses. The electric bus power device comprises a shell, a traction motor, and a planetary gear reducer; wherein, the traction motor is fixed in the shell; the output end of the traction motor is connected with the input end of the planetary gear reducer; the traction motor and the planetary gear reducer are arranged overall in the shell, wherein, a speed sensor is also arranged in the shell. When the electric bus power device is used for the city buses, under the conditions of full load and any road condition, the buses can all be made to smoothly start, accelerate and run. In the electric bus power device disclosed by the utility model, the power and the control system as a whole are arranged in the shell, so the whole device is made to be smaller and more compact, and easy to be maintained.

Description

The electrobus engine installation

Technical field

The utility model relates to a kind of electrobus engine installation, especially a kind of electrobus engine installation that has epicyclic reduction gear.

Background technology

Present 8～11 meters electric bus passenger vehicle need add one speed reducer between traction electric machine and main gear, can give full play to the towability of motor like this.As public bus, can satisfy under full load conditions, under any road conditions condition, can both start to walk smoothly, quicken and move.But can't satisfy under the situation of above-mentioned requirements, so only install retarder additional in order to increase tractive force at present traction electric machine.

The technology contents of utility model

For this reason, the purpose of this utility model is to propose a kind of electrobus engine installation that has epicyclic reduction gear, can satisfy under full load conditions when it is used in when using on the bus, under any road conditions condition, can both make passenger vehicle start to walk smoothly, quicken and move.

Another purpose of the present utility model is to propose littler, the compacter electrobus engine installation of a kind of volume, and its maintainability is better.

For realizing above-mentioned utility model purpose, electrobus engine installation of the present utility model, this device comprises housing, traction electric machine, epicyclic reduction gear, wherein traction electric machine is fixed in the housing, and the traction electric machine mouth links to each other with the epicyclic reduction gear input end, traction electric machine and epicyclic reduction gear integral installation also are provided with speed sensor in its middle shell in housing.

Technique scheme of the present utility model has the following advantages compared to existing technology: the driving efficiency height of epicyclic reduction gear, usually 98～99%, its weight is light when transmitting same power and moment of torsion, because there have planetary wheel will drop into the ingear number of teeth to be many, with respect to cylindrical wheel, just can reduce the modulus of gear, the size of respective gears can reduce.

Secondly, electrobus engine installation medium power that the utility model proposed and control system integral installation make whole device volume littler, compacter in housing, are convenient to safeguard.

Description of drawings

For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below

Fig. 1 is the overall structure scheme drawing that the electrobus of engine installation of the present utility model is installed;

Fig. 2 is the scheme drawing of an embodiment of electrobus engine installation of the present utility model;

Fig. 3 is the A-A cross-sectional view among Fig. 2;

Fig. 4 is the another kind of version of the A-A cross-sectional view among Fig. 2.

The specific embodiment

With reference to the accompanying drawings the specific embodiment of the present utility model is elaborated, wherein, the analog structure of different embodiment in different accompanying drawings adopts identical Reference numeral to describe.Should be pointed out that following detailed description only is exemplary, not should be understood to the restriction to a kind of strictness of protection domain required for protection in claims.

Fig. 1 is the overall structure scheme drawing that is equipped with according to the electrobus of engine installation of the present utility model, Fig. 2 is the scheme drawing of an embodiment of electrobus engine installation of the present utility model, Fig. 3 is the A-A cross-sectional view among Fig. 2, and Fig. 4 is the another kind of version of the A-A cross-sectional view among Fig. 2.

Electrobus 20 shown in Fig. 1 is furnished with the engine installation that drives power wheel 10 in its front portion, certainly, driving/power wheel can be a front-wheel, it also can be trailing wheel, those skilled in the art should be appreciated that being provided with of this power wheel or drive wheel can perhaps be used for engine installation layout of the present utility model the vehicle of four wheel drive according to the different demand changes in actual conditions or the design.

According to the scheme drawing of an embodiment of engine installation of the present utility model as shown in Figure 2, wherein the electrobus engine installation comprises housing 2, traction electric machine 1, epicyclic reduction gear 3, speed sensor 7 and speed sensor gear case 5, wherein traction electric machine 1 is fixed in the housing 2, traction electric machine 1 mouth links to each other with epicyclic reduction gear 3 input ends, traction electric machine 1 and epicyclic reduction gear 3 integral installations wherein also are provided with speed sensor 7 and speed sensor gear case 5 in housing 2.

Traction electric machine 1 bottom is installed on the housing 2 by connecting element, its mouth shoulder is fixed on the fixed positioning piece 8 in the housing 2, wherein mouth links to each other with epicyclic reduction gear 3, the mouth of epicyclic reduction gear links to each other with speed sensor gear case 5, speed sensor gear case 5 changes the back by the velocity amplitude size of speed sensor acquisition by epicyclic reduction gear 3 outputs, in order to by corresponding control system motor 1 is controlled by gear structure wherein.

Speed sensor gear case 5 and non-essential parts among Fig. 2, perhaps speed sensor gear case 5 also can be combined into same parts with epicyclic reduction gear 3 and installs, perhaps speed sensor 7 is installed within the epicyclic reduction gear 3, wherein output gear is detected, equally also can obtain the velocity amplitude size of epicyclic reduction gear 3 outputs, in order to motor 1 is controlled by corresponding control system.

Control system can be arranged in engine installation inside, also can be arranged in the engine installation outside.The utility model preferably is arranged in control circuit board within the housing 2, control circuit board can also be arranged within the epicyclic reduction gear 3, perhaps also control circuit board can be arranged within the speed sensor gear case 5, perhaps directly control circuit board be arranged in the motor 1.

The above preferred embodiment form all can reduce the volume of engine installation, makes that whole engine installation is compacter, and engine installation integral installation circuit within housing 2 is connected all within housing, can not cause confusion, fault.

As shown in Figure 1, what epicyclic reduction gear 3 adopted is 2K-H (NGW) type, is its structure diagram shown in Fig. 1.Epicyclic reduction gear 3 shown in the figure is speed reduction gearings, in order to the rotating speed of reduction motor 1, and the output torque of increase motor 1.Wherein the mouth of motor 1 links to each other with the wheel shaft of the center gear 34 of epicyclic reduction gear, center gear 34 is meshed with a plurality of satellite gears 32 and rotates around center gear 34, the number of display line star-wheel 32 is 3 among the figure, be preferably 4, the wheel shaft of satellite gear 32 and wheel carrier 31 are rotatedly connected, the wheel shaft of power by satellite gear 32 passes to wheel carrier 31 and exports to power wheel 10, and satellite gear 32 outsides are meshed with inner gear 33, shown in Fig. 3,4 is this epicyclic reduction gear front view wherein.

In a specific embodiment, the parameter of electric machine of employing is:

1. rating horsepower: 45KW

2. maximum speed of revolution: 5400rpm

3. rated speed of rotation: 1760rpm

4. peak power: 90KW

5. torque peak: 690N*M

6. practical moment of torsion: 240N*M

2. parameter is selected and relevant calculation:

Reduction ratio: $i_{34H}=1+\frac{Z_{33}}{{\mathrm{<figure-callout\; id="34"\; label="Z"\; filenames="Y0326091400091.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{34}}$

The number of teeth is selected and i _34H

1×2×3∶32×13×58

i _34H＝2.8

Modulus: m

Normal module: 3.5

Transverse module: 3.732

Reference circle upward pressure angle β: 20

The four big necessary conditions that each wheel gear apolegamy will be satisfied in the train:

▲ assurance realizes given transmitting ratio:

$\frac{Z_{33}}{{\mathrm{<figure-callout\; id="34"\; label="Z"\; filenames="Y0326091400091.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{34}}=i_{34H}-1=1.8$

Concentric condition is satisfied in ▲ assurance: (necessary and sufficient condition)

According to the dead in line condition of two center gears, when the transmission of the standard of employing,

Z ₃₃＝Z ₃₄+2Z ₃₂＝32+26＝58

Mounting condition is satisfied in ▲ assurance:

(Z ₃₄+Z ₃₃)/3＝(32+58)/3＝N＝30

▲ guarantee to satisfy in abutting connection with condition:

(32+13)sin60°＞13+1.6，B＝56

38.9＞14.6

The calculating of each gear parameter in the train:

Code name and formula	Sun gear	Planetary wheel
			D＝m t.Z n	119.424	48.516
P t＝π.m t＝P n/cosβ	11.718	11.718
			S n＝π.m n/2	5.495	5.495
S t＝π.m t/2	5.859	5.859
			d b＝d.cosα t
h a＝h at.m t	3.732	3.732
			h f＝(h at+c t).m t	[8.397]	[8.397]
	4.665	4.665
			d a＝d+2h a	126.888	55.98
d f＝d-2h f	110.094	39.186
			a 1.2＝(d 1+d 2)/2	83.97

ε _f＝ε _α+ε _β＝ε _α+Bsinβ/π.m _n

Ring gear:

d＝m t.Z	216.456
		d a＝m t.(Z-2h a)	188.600
d f＝m t.(Z+2h a+2c)	225.786
		P＝π.m t	11.718
S＝π.m t/2	5.859

The selection of bearing:

7020AC	1003150324	5000 rev/mins
			7021AC	1053160326	4800 rev/mins
NK68/35	68382335	5300 rev/mins

The little tooth of adapter sleeve (inside and outside)

m＝2	α＝208
		d＝m.Z	48
h a＝h a*.m	2
		h f＝(h a*+C*).m	2.5
h＝h a+h f	4.5
		d a＝d+2h a	52
d f＝d 1-2h f	43
		P＝π.m	6.28
S＝π.m/2	3.14
		e＝[]	[3.14]

C＝C*.m	0.5
		d Ring＝d	48
d a＝d Ring-2h a	44
		d f＝d Ring+2h a	53

Oil sealed is selected

The lubricated selection

Select oil lubrication for use:

(1) with II, III ATF oil

With 15W/30CD level (preferably)

The utility model can also be preferred:

Local galaxy gear reducer module of gear is not more than 3.5

This retarder i _34H=2.7～2.8

Planetary wheel number: 4

Outboard gears Φ _Max=203～214mm

The facewidth: B _Max=56mm

Shell sizes: diameter * width * beam overall=280 * 170 * 210mm

The lubricated selection:, immerse splash system lubrication with automobile-used ATF lubricating oil

Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.

Claims (8)

1. electrobus engine installation, this device comprises housing (2), traction electric machine (1), epicyclic reduction gear (3), wherein said traction electric machine (1) is fixed in the described housing (2), described traction electric machine (1) mouth links to each other with described epicyclic reduction gear (3) input end, it is characterized in that: described traction electric machine (1) and described epicyclic reduction gear (3) integral installation also are provided with speed sensor (7) in the wherein said housing (2) in described housing (2).

2. electrobus engine installation as claimed in claim 1, it is characterized in that, described electrobus engine installation also comprises a control system, described control system and described speed sensor (7) link, and described speed sensor (7) links with the speed sensor gear case (5) that is arranged in the described housing (2).

3. electrobus engine installation as claimed in claim 1, it is characterized in that, described electrobus engine installation also comprises a control system, and described control system and described speed sensor (7) link, and described speed sensor (7) links with described epicyclic reduction gear (3).

4. as claim 2 or 3 described electrobus engine installations, it is characterized in that the control circuit board of described control system is arranged within the described housing (2).

5. as claim 2 or 3 described electrobus engine installations, it is characterized in that the control circuit board of described control system is arranged within the described epicyclic reduction gear (3).

6. electrobus engine installation as claimed in claim 2 is characterized in that, the control circuit board of described control system is arranged within the described speed sensor gear case (5).

7. as claim 2 or 3 described electrobus engine installations, it is characterized in that the control circuit board of described control system is arranged within the described motor (1).

8. as claim 1, one of 2,3,6 described electrobus engine installations is characterized in that described shell (2) is of a size of: diameter * width * beam overall=280 * 170 * 210mm.

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