CN2791368Y

CN2791368Y - Differential gear

Info

Publication number: CN2791368Y
Application number: CN 200520016308
Authority: CN
Inventors: 谢龙昌; 张信良; 柯国勇
Original assignee: Chengguang Sci & Tec Co Ltd
Current assignee: Chengguang Sci & Tec Co Ltd
Priority date: 2005-04-11
Filing date: 2005-04-11
Publication date: 2006-06-28
Anticipated expiration: 2015-04-11

Abstract

The utility model relates to a differential gear which comprises a casing, an annular gear arranged in the casing, a clamp connecting block embedded on the annular gear, two planet bevel gears respectively pivoted on the front and the back sides of the clamp connecting block in coaxial type, two power output bevel gears pivoted on the left and the right sides of the clamp connecting block, two bearings and two transmission shafts which extend by penetrating into the casing and are linked with the power output bevel gears, wherein the equal bearings are respectively sheathed on the equal power output bevel gears and are arranged on the casing so as to the weight of the annular gear, the planet bevel gears and the power output bevel gears is loaded on the casing to reduce the load of the inner ends of the transmission shafts.

Description

Differential mechanism

[technical field]

The utility model relates to a kind of differential mechanism, particularly relates to a kind of applying on the electric vehicle, to cause the left and right wheels speed difference, and the differential mechanism that vehicle is turned smoothly.

[background technique]

Figure 1 shows that the differential mechanism of general electric vehicle, this differential mechanism is driven to drive wheel (figure does not show) by an electric motor 11 and rotates, this differential mechanism has that a housing 13, is installed in this housing 13 and plugs into the transmission shaft 15 in this housing 13 with the gear unit 14, two of electric motor 11 interlocks, and most encapsulations respectively are located at the bearing 16 on this transmission shaft 15.This housing 13 has a holding part 131 that is installed in this gear unit 14, and two pipe spreaders 132 that extended toward both sides coaxially by this limit, holding part 131 two opposite sides respectively.

These transmission shafts 15 be exactly respectively by the pipe spreader 132 of this housing 13 stretch through into and with this gear unit 14 interlocks rotation, and these bearings 16 are exactly to be sheathed on this transmission shaft 15 and to be installed in this pipe spreader 132.Whereby, these electric motor 11 driven gear unit 14 rotate with interlock transmission shaft 15.

When but this gear unit 14 is installed in the holding part 131 of this housing 13, be complete unsettled setting, but very support and be rotatably mounted in this housing 13 by the inner of these transmission shafts 15.That is to say that the torque when these transmission shafts 15 are driven except bearing, a moment that causes from the gravity of gear unit 14 is also born in its inner, increases the load of transmission shaft 15.

[model utility content]

The purpose of this utility model provides a kind of differential mechanism, can avoid causing this transmission shaft the inner to be subjected to moment because of the weight of gear unit, thereby can reduce the load of transmission shaft.

A kind of differential mechanism of the present utility model comprises:

One housing has a holding part, and two pipe spreaders that extended toward both sides coaxially by this limit, two opposite sides, holding part left and right sides respectively;

One ring gear, the horizontal axis that extends around about is installed in the holding part of this housing rotatably;

One clamping block is installed in this ring gear with extending up and down, and has two and result from its left and right sides two relative side respectively and be positioned at the pivot joint flange of ring gear circle centre position;

Two planetary bevel gears coaxially respectively are hubbed at both sides before and after this clamping block, and the axis normal of described planetary bevel gear is in the central axis of this ring gear;

Two power output bevel gears, each power output bevel gear have the gear part that an inner shafts is placed on the pivot joint flange of this clamping block and meshes described planetary bevel gear, and a tubulose sleeved part of being extended outward by this gear part;

Two bearings, plug is loaded in the pipe spreader of this housing; And

Two transmission shafts are stretched respectively in the described pipe spreader that is loaded on this housing;

It is characterized in that: described bearing is the sleeved part outer circumferential face that is sheathed on described power output bevel gear respectively, and described transmission shaft the inner be can be linkedly respectively axle be loaded in the sleeved part of described power output bevel gear.

[description of drawings]

Below by most preferred embodiment and accompanying drawing differential mechanism of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the three-dimensional cutaway view of general differential mechanism, and the assembling situation of its inside is described.

Fig. 2 is the embodiment's of the utility model differential mechanism a stereogram, and illustrates that it is driven to drive two wheels by a motor.

Fig. 3 is this embodiment's a three-dimensional exploded view.

Fig. 4 is this embodiment's an overlooking surface sectional view, and the interlock situation of a gear unit is described.

Fig. 5 is this embodiment's a part overlooking surface sectional view, and the interlock situation of two planetary bevel gear power output bevel gears of this gear unit is described.

Fig. 6 be this embodiment with the view that 6-6 hatching line among Fig. 4 dissects, illustrate that this gear unit is installed on the structure in the housing.

Fig. 7 is this embodiment's a side sectional view, illustrates that this gear unit is that axle is loaded on this housing via two bearings.

[embodiment]

As shown in Figures 2 and 3, the embodiment of the utility model differential mechanism 3 is suitable for being installed on the electric vehicle (figure does not show), and two wheels 22 that drive the left and right sides to be driven by an electric motor 21 rotate.This differential mechanism 3 comprises: a housing 4, is placed in gear unit 5, majorities in this housing 4 and is installed on bearing 6 in this housing 4, and two insert stretch in this housing 4 and with the transmission shaft 7 of these gear unit 5 interlocks.Present embodiment is that to drive with electric motor 21 be that example explains, in the enforcement not as limit.

This housing 4 has a holding part 41, and two pipe spreaders 42 that extended toward both sides coaxially by this limit, two opposite sides, holding part 41 left and right sides respectively.

As Fig. 3, Fig. 4 and shown in Figure 5, this gear unit 5 have a ring gear 51, be embedded in this ring gear 51 clamping block 52, two accordingly axle be loaded on that planetary bevel gear 53, two on these clamping block 52 front and back two side faces is positioned on the left and right sides two side faces of this clamping block 52 and the gear pole that drives by described electric motor 21 with the power output bevel gear 54 of these planetary bevel gears 53 engagements, 55, one with the gearwheel 56 of gear pole 55 engagements, and one with these gearwheel 56 coaxial interlocks and the small gear 57 that meshes with this ring gear 51.

The horizontal axis that this ring gear 51 extends around about one is installed in the holding part 41 of this housing 4 rotatably.And be circular and the dual side-edge up and down respectively at inner circumferential surface on have two clamping grooves 511 respectively.

The upper and lower end of this clamping block 52 is embedded at respectively in these clamping grooves 511 of ring gear 51, and has two and result from its left and right sides two relative side respectively and be positioned at the pivot joint flange 521 of ring gear 51 circle centre positions.

As Fig. 3, Fig. 5 and shown in Figure 6, each planetary bevel gear 53 has a cylindric sleeve 531 that is installed in these clamping block 52 sides, and two gear part 532 that are set on this sleeve 531.The sleeve 531 of these planetary bevel gears 53 is to be fixed on the front and back two side faces of this clamping block 52 by a screw 533, and the axis normal that causes two planetary bevel gears 53 is in the central axis of this ring gear 51.

Each power output bevel gear 54 has an inner shafts and is placed on the pivot joint flange 521 of this clamping block 52 and meshes the tubulose sleeved part 542 that the gear part 541, of these planetary bevel gears 53 is extended outward by this gear part 541 simultaneously, and results from two latch grooves 543 of these sleeved part 542 inner peripheral surfaces two opposite sides.

These bearings 6 are sheathed on sleeved part 542 outer circumferential faces of these power output bevel gears 54 respectively, and plug is loaded in the pipe spreader 42 of this housing 4.

Whereby, these power output bevel gears 54 rotatably are fixed in this housing 4 by these bearings 6, and articulate flanges 521 by these of this clamping block 52 and be set in respectively in the gear part 541 of these power output bevel gears 54, power output bevel gear 54 is led on the left and right side that is positioned at this clamping block 52.That is to say that this ring gear 51, planetary bevel gear 53 and power output bevel gear 54 are to be assembled in this housing 4 by these bearings 6, the weight that makes ring gear 51, clamping block 52, planetary bevel gear 53 and power output bevel gear 54 is to be born by this housing 4.

These transmission shafts 7 are stretched respectively in these pipe spreaders 42 that are loaded on this housing 4, and inner can being plugged in respectively linkedly in the sleeved part 542 of these power output bevel gears 54.And each transmission shaft 7 is radially inserted by one and is extended through in the latch groove 543 that its inner latch 71 is installed in this power output bevel gear 54, makes this power output bevel gear 54 and these transmission shaft 7 interlocks.The outer end of these transmission shafts 7 is to stretch through to adorn for described wheel 22 (being found in Fig. 2) couple axle to pipe spreader 42 outsides of this housing 4.

Whereby, when this gear pole 55 is driven by described electric motor 21, drive this ring gear 51 via large and

small gear

56,57 and rotate.And when this ring gear 51 is driven by described electric motor 21, roll to drive these these wheels 22 of transmission shafts 7 drivings by the engagement of planetary bevel gear 53 and power output bevel gear 54, and cause described electric vehicle to advance.When described electric vehicle must be turned, can rotate by these planetary pinions 53 of this gear unit 5 and cause these power output bevel gear 54 speed difference, the rotating speed difference that described wheel 22 (being found in Fig. 2) is advanced causes electric vehicle to turn.

As Fig. 5 and shown in Figure 7, since these power output bevel gears 54 by these bearings 6 and the axle be loaded in the pipe spreader 42 of this housing 4, so torsion that the inner of these transmission shafts 7 is driven by gear unit 5 only, and the moment that weight caused of gearless unit 5 can reduce the moment of bearing of these transmission shafts 7.

Take a broad view of above-mentioned, these power output bevel gears 54 of the utility model differential mechanism 3 by these bearings 6 and the axle be loaded on this housing 4, making ring gear 51, planetary bevel gear 53 and power output bevel gear 54 is that axle is loaded on the housing 4, avoid causing these transmission shaft 7 the inners to be subjected to moment because of the weight of gear unit 5, to reduce the load of transmission shaft 7, so very practical really and progressive.

Claims

1. differential mechanism comprises:

Two bearings, plug is loaded in the pipe spreader of this housing; And

2. differential mechanism as claimed in claim 1 is characterized in that: this ring gear be circular and the dual side-edge up and down respectively at inner circumferential surface on have two clamping grooves respectively, the upper and lower end of this clamping block is embedded at respectively in the described clamping groove.

3. differential mechanism as claimed in claim 1, it is characterized in that: each planetary bevel gear has a cylindric sleeve that is installed in this clamping block side, and two gear part that are set on this sleeve, the sleeve of described planetary bevel gear is to be fixed on the front and back two side faces of this clamping block by a screw.

4. differential mechanism as claimed in claim 1, it is characterized in that: each power output bevel gear is respectively equipped with the latch groove in these sleeved part inner peripheral surface two opposite sides, and each transmission shaft is radially inserted by one and extended through in the latch groove that its inner latch is installed in this power output bevel gear.