CN2426809Y - Rear-wheel driving bridge assembly for light vehicle - Google Patents

Abstract

The utility model relates to a rear driving axle assembly for a light automobile. A circular tube section axle housing of an original BJ130 type is changed into a square tube section axle housing 2, and the dimension of which is that outer side length 105 mm * outer side length 105 mm * wall thickness 6 mm; the original 3t capacity lever BJ130 type rear wheel axle is improved into the 4.5 t capacity level, and the hydraulic braking is changed into the pneumatic braking; when a running automobile is braked, a driver pedal only control a pneumatic valve, when the automobile can be lightly braked under the overloading condition, the labor can be saved, and the response speed is high. The circular pipe section axle housing of the original 2310 rear axle is changed into the square tube section axle housing 2, and the dimension of which is that outer long length 85 mm * outer long length 85 mm * wall thickness 5 mm.

Description

Lilliput car rear driving axle assembly

The utility model relates to lilliput car rear driving axle assembly.Relate in particular to the lilliput car rear driving axle assembly of compression air brake.

Current domestic public BJ130 type lilliput car load carrying ability is generally 1.5-2t (being equivalent to rear driving axle capacity 3t), simultaneously, the axle housing of BJ130 automobile is the pipe cross section of Φ 105mm * 6mm (external diameter * wall thickness), and the axle housing of 2310 type automobiles is the pipe cross section of Φ 85mm * 5mm (external diameter * wall thickness).The vertical bending stiffness of the axle housing of the axle housing of BJ130 automobile and 2310 type automobiles is little, makes that the automobile axle load carrying ability is little.

And it is the hydraulic braking pattern of working medium that BJ130 type lilliput car generally all adopts the chemosynthesis braking liquid, but in long-term use process Shen, its shortcoming is a chemosynthesis braking liquid contaminated environment, corrosion auto parts and components and harmful.

Prior art Chinese patent Granted publication number: CN2199883, patent No. ZL94209957.5, utility model title: lilliput car rear driving axle, complex structure.

The purpose of this utility model is: provide that a kind of load-carrying capacity is big, the lilliput car rear driving axle assembly of compression air brake, protection environment.

Technical characterstic of the present utility model is: the utility model continues to adopt the difference of former BJ130 back axle to subtract assembly and wheel limit structure, parts such as semiaxis.Improvement part is: be improved to the 4.5t capacity level on the basis of former 3t capacity level BJ130 type lilliput car rear driving axle structure, improve load-carrying capacity, also original hydraulic braking is improved to the compression air brake pattern simultaneously.

See Fig. 1: drive part is: weld mutually with axle tube 11 at two ends, rear drive axle housing 2 left and right sides, connect brake support plate 12 on axle tube 11 flanges, two tapered roller bearings 10 of assembling on the axle tube 11, by tapered roller bearing 10 supporting left and right sides wheel hubs 13, brake wheel 9 and wheel are installed on the wheel hub 13, semiaxis 3 flanges, one end and wheel hub 13 end faces are connected and fixed, the other end penetrates axle tube 11 and rear-axle casing 2, be connected with the axle side gear 4 of main reduction gear, the operation torque of automotive engine output makes automotive operation by power-transfer clutch-change speed gear box-transmission shaft-main reduction gear-semiaxis 3-wheel hub 13-wheel.Identical with top with the drive part structure of the BJ130 type rear driving axle of prior art.

Improvement part of the present utility model is: the structure of air-pressure brake is: air chamber 5 is by the first half and lower part blanked part, glued membrane of therebetween is formed, the push rod on air chamber 5 next doors, fork-shaped attaching parts 14 are connected with regulating arm 6, there is a splined hole to cooperate in the regulating arm 6 with castellated shaft on the camshaft 7, the preceding end cam 15 of camshaft 7 extend in two interior brake straps 8 of drg, and camshaft 7 is fixed on the rear-axle casing 2 by camshaft stand 16; Two eccentric shaft 17 axial location make eccentric shaft can adjust the gap of 8 of brake straps, and brake support plate 12 usefulness bolt are on the flange 18 of rear-axle casing 2, and two brake strap 8 usefulness pull back springs 19 are held, and cam 15 are clipped in the centre of brake strap 8.

When service brake in service or emergency braking, chaufeur depresses brake pedal, the control pressurized air promotes glued membrane in the air chamber 5, adjusting arm 6 is rotated, thereby drive camshaft 7 and cam 15 rotations, brake strap 8 is outwards opened and the applying of brake wheel 9 inwalls, absorb and the offset wheel rotating torque, make automobile out of service, finish braking function.

Improvement for axle housing is as follows:

1, with the back axle pipe cross section axle housing of former BJ130 type, changes square tube cross section axle housing 2 into, be of a size of outer length of side 105mm * outer length of side 105mm * wall thickness 6mm;

2, with the back axle pipe cross section axle housing of former 2310 types, change square tube cross section axle housing 2 into, be of a size of outer length of side 85mm * outer length of side 85mm * wall thickness 5mm.

Advantage of the present utility model:

1, because the rear axle case 2 of BJ130 type and 2310 type automobiles adopts square tube cross section axle housing, and bending stiffness has improved 70% than pipe axle housing bending stiffness, and technology is constant substantially, and material consumption slightly increases.This has not only increased substantially the load-carrying capacity of back axle 2, and because increasing substantially of axle housing 2 rigidity improves the semiaxis force-bearing situation, increases the service life.

Be calculated as follows:

The vertical bending stiffness of former BJ130 pipe cross section axle housing is: $W1=\frac{\mathrm{\π}({105}^4-{93}^4)}{32\×105}=43707\left({\mathrm{mm}}^4\right)$

The vertical bending stiffness that changes square tube cross section axle housing 2 into is: $\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="0022326700061.png"\; state="\{\{state\}\}">W</figure-callout>}2=\frac{105\&times;{105}^3-93\&times;{93}^3}{6\&times;105}=74199\left({\mathrm{mm}}^4\right)$

Therefore square tube cross section axle housing 2 bending stiffnesies have improved than pipe cross section axle housing: $\frac{W2-W1}{W1}=\frac{74199-43707}{43707}=70\%$

2, change compression air brake into stoste compacting is moving, making original chaufeur is propulsion source with foot-operated power, implements braking through pedal-master cylinder-wheel cylinder, change the compressed-air power source into, driver pedal is only controlled air pressure valve, and is therefore lightly a lot of at heavily loaded glancing impact, laborsaving and be swift in response; Simultaneously also having avoided former hydraulic brake fluid generally all to adopt the chemosynthesis agent is working medium, and corrosion auto parts and components, contaminated environment and harmful drawback are arranged in the long-term use process.

Fig. 1: lilliput car rear driving axle assembly structure chart of the present utility model.

Fig. 2: the BJ130 type of prior art and 2310 type rear axle case constructionals drawing.

Fig. 3: axle housing 2 constructionals drawing of lilliput car rear driving axle assembly of the present utility model.

Embodiment 1:

See Fig. 3,, be square tube cross section axle housing, be of a size of outer length of side 105mm * outer length of side 105mm * wall thickness 6mm for the axle housing 2 of BJ130 type;

See Fig. 1, it is identical that drive part and front have been narrated.The structure of air-pressure brake is: air chamber 5 is by the first half and lower part blanked part, glued membrane of therebetween is formed, the push rod on air chamber 5 next doors, fork-shaped attaching parts 14 is connected with regulating arm 6, there is a splined hole to cooperate in the regulating arm 6 with castellated shaft on the camshaft 7, the preceding end cam 15 of camshaft 7 extend in two interior brake straps 8 of drg, camshaft 7 is fixed on the rear-axle casing 2 by camshaft stand 16, two eccentric shaft 17 axial location, make eccentric shaft can adjust the gap of 8 of brake straps, brake support plate 12 usefulness bolt are on the flange 18 of rear-axle casing 2, two brake strap 8 usefulness pull back springs 19 are held, and cam 15 are clipped in the centre of brake strap 8.

Embodiment 2:

See Fig. 3, being characterized as of the lilliput car rear driving axle assembly of another kind of lighter one-level: only former 2310 back axle pipe cross section axle housings are of a size of: external diameter Φ 85mm * wall thickness 5mm, change square tube cross section axle housing into, be of a size of: outer length of side 85mm * outer length of side 85mm * wall thickness 5mm, still adopt original hydraulic brake structure.

Claims (2)

1, lilliput car rear driving axle assembly comprises: weld mutually with axle tube 11 at two ends, rear drive axle housing 2 left and right sides, connect brake support plate 12 on axle tube 11 flanges, two tapered roller bearings 10 of assembling on the axle tube 11, connect left and right sides wheel hub 13 by tapered roller bearing 10, brake wheel 9 and wheel are installed on the wheel hub 13, and semiaxis 3 flanges, one end and wheel hub 13 end faces are connected and fixed, and the other end penetrates axle tube 11 and rear-axle casing 2, be connected with the axle side gear 4 of main reduction gear, it is characterized by:

For the axle housing 2 of BJ130 type automobile, be square tube cross section axle housing, be of a size of outer length of side 105mm * outer length of side 105mm * wall thickness 6mm;

The structure of air-pressure brake is: air chamber 5 is by the first half and lower part blanked part, glued membrane of therebetween is formed, the push rod on air chamber 5 next doors, fork-shaped attaching parts 14 is connected with regulating arm 6, there is a splined hole to cooperate in the regulating arm 6 with castellated shaft on the camshaft 7, the preceding end cam 15 of camshaft 7 extend in two interior brake straps 8 of drg, camshaft 7 is fixed on the rear-axle casing 2 by camshaft stand 16, two eccentric shaft 17 axial location, make eccentric shaft can adjust the gap of 8 of brake straps, brake support plate 12 usefulness bolt are on the flange 18 of rear-axle casing 2, two brake strap 8 usefulness pull back springs 19 are held, and cam 15 are clipped in the centre of brake strap 8.

2, lilliput car rear driving axle assembly according to claim 1, its feature comprises: only change former 2310 type automobile axle pipe cross section axle housings into square tube cross section axle housing 2, be of a size of outer length of side 85mm * outer length of side 85mm * wall thickness 5mm, still adopt original hydraulic brake structure.

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