The front drive axle reducer shell
Technical field
The utility model relates to the car deceleration device, especially a kind of front drive axle reducer shell that is used for preposition forerunner, 4 wheel driven vehicle.
Background technique
Principal organ such as the motor of vehicle, steering equipment all are arranged at front part of vehicle; Therefore be provided with that the space is little, restriction is many; Driving and driven tooth of the retarder of front drive axle and differential mechanism all are installed in the installation cavity that is made up of front drive axle reducing gearbox body cavity shell, and the installation cavity two ends are back of the body lid, the input shaft end lid may enclose through being fixedly connected with the chamber shell respectively.Be divided into input shaft outer bearing installation cavity, shoe cream room, input shaft inner bearing installation cavity, differential mechanism installation cavity successively along retarder drive path installation cavity; Wherein input shaft outer bearing installation cavity, input shaft inner bearing installation cavity are the chambeies that is used to install bearing of input shaft and input shaft; Shoe cream room is corresponding input shaft axle sleeve between two bearings; The differential mechanism installation cavity is the chamber that is used to install differential mechanism and the driving and driven tooth of retarder, and constitutes the oil tray of lubricant oil simultaneously by the differential mechanism installation cavity.
Be ease of assembly; The chamber shell of existing front drive axle reducer shell adopts split type structure usually, and partition patterns mainly comprises two kinds: along more than half axis and perpendicular to the plane subdivision of input shaft axis be two ones of front and back, along cross the input shaft axis and perpendicular to the plane subdivision of semiaxis axis be about two ones.Two ones differential casing is an example before and after with the subdivision being; The chamber shell comprises upper body, lower case; The seat of honour of split type axle bearing seat is one-body molded with upper body, lower case respectively with following, and the limited ring of split type axle bearing seat adopts subdivision structure and one-body molded with upper body, lower case equally.
In the vehicle driving process, power is imported into by input shaft, and the differential mechanism driving tooth rotates and drives driven tooth and rotates with input shaft, and driven tooth is got rid of the lubricant oil in the chamber and splashed on each gear, inner bearing, the chamber wall.The input shaft outer bearing also promptly away from the bearing of driven tooth one end, can't be realized lubricating through directly getting rid of to spatter, and therefore, obtains proper lubrication in order to guarantee the input shaft outer bearing, and the chamber shell is provided with oil input channel and back oil road.Usually; Oil input channel is arranged on shell top, chamber and is communicated with the differential mechanism installation cavity and shoe cream room, back oil road are arranged on chamber shell bottom and are communicated with input shaft outer bearing installation cavity and differential mechanism installation cavity; Got rid of a part of lubricant oil that splashes differential mechanism installation cavity inwall and get into the shoe cream room between the two bearings installation cavity from oil input channel, the lubricant oil in the shoe cream room returns the differential mechanism installation cavity by back oil road after partly flowing to inner bearing and flowing back to interior, the partly lubricated outer bearing of differential mechanism installation cavity.
But the retarder of front drive axle; Input shaft is positioned at the differential mechanism rear, also is that oil input channel is positioned at retarder driven tooth rear, rotates counterclockwise during retarder driven tooth cruising; The oil input channel oil-feed; At first get rid of through driven tooth and spatter lubricant oil to top of chamber, lubricant oil flows into oil input channel or gets into oil input channel through the bounce-back of chamber roof along the chamber roof of inclination then, so oil-feed is comparatively difficult.The input shaft outer bearing receives centrifugal forces affect less than inner bearing, and the suction of inner bearing is bigger; Lubricant oil is sucked by inner bearing more easily; Cause the outer bearing lubricants capacity not enough, and then cause that the outer bearing temperature continue to raise, cause the damage of outer bearing easily and break down.
The model utility content
It is reliable and amount is big that the utility model technical problem to be solved provides a kind of oil input channel oil-feed, and outer bearing lubricates, and the front drive axle reducer shell of highly versatile.
The utility model solves the technological scheme that its technical problem adopted: the front drive axle reducer shell; Comprise the chamber shell, oil input channel, back oil road, the split type axle bearing seat that constitute installation cavity; Successively installation cavity is divided into input shaft outer bearing installation cavity, shoe cream room, input shaft inner bearing installation cavity, differential mechanism installation cavity along the retarder drive path, wherein input shaft outer bearing installation cavity, the coaxial setting of input shaft inner bearing installation cavity and axis are positioned at split type axle bearing seat axis below; Part between the oil input channel two ends is isolated with installation cavity, and the oil input channel two ends are communicated with differential mechanism installation cavity and shoe cream room respectively, and oil input channel is arranged at the middle part of chamber shell one side, and the end that is communicated with the differential mechanism installation cavity of oil input channel is higher than the other end of oil input channel.
Further; The two ends of said oil input channel axis; Said oil input channel is communicated with the axis of an end between input shaft inner bearing installation cavity axis and split type axle bearing seat axis with the differential mechanism installation cavity, said oil input channel is communicated with an end with shoe cream room axis is positioned at input shaft inner bearing installation cavity axis below.
Further, said oil input channel axis and input shaft inner bearing installation cavity axis angle are 10 °~14 °.
Further, said shoe cream room bottom is provided with coaxial with it and is fixed on the oily wall of the ring-like retaining of semicircle on the shell of chamber, and said oil input channel is communicated with the shoe cream room between oily wall of retaining and the input shaft outer bearing installation cavity.
Further, said back oil road is arranged on shell bottom, chamber, and the part between the back oil road two ends is isolated with installation cavity, two ends are communicated with input shaft outer bearing installation cavity and differential mechanism installation cavity respectively; The opening that back oil road is communicated with an end with the differential mechanism installation cavity is greater than the other end opening.
Further; Said oil input channel is arranged at the corresponding side that the driven tooth that retarder links to each other with differential mechanism is installed of chamber shell, and oil input channel is communicated with an end with the differential mechanism installation cavity opening is positioned at the differential mechanism installation cavity is communicated with an end with the end face of the adjacent end of input shaft inner bearing installation cavity, with shoe cream room opening and is positioned at the shoe cream room side.
Further, said oil input channel is a tapered channel, and the cross section that is communicated with an end with the differential mechanism installation cavity is greater than the other end; Said oil input channel both ends open all adopts the horn mouth that adapts with corresponding cross section.
Further, said oil input channel is provided with oil hole.
Further; Said chamber shell comprises upper body, lower case; Wherein the separating surface of upper body, lower case was a split type axle bearing seat axis and perpendicular to the plane of input shaft inner bearing installation cavity axis, and upper body, the moulding of lower case integrally casting.
Further; Split type axle bearing seat comprises limited ring, the seat of honour and following; And the split surface between the seat of honour and following is the separating surface of upper body, lower case, wherein limited ring and following and chamber shell integrally casting moulding, and the seat of honour is to pass through bolt and following absolute construction that is fixedly connected.
The beneficial effect of the utility model is: the change of position is set through oil input channel; Oil input channel got rid of spatter the oil-feed mode and change the overflow mode that pasta rises and to cause into; Oil-feed is reliable and amount is big; Can guarantee to be the lubricated lubricant oil that capacity is provided of outer bearing, avoid because the outer bearing temperature continues damage and the fault that rising causes.Simultaneously, the restriction that vehicle front mechanism is many, front reduction gear is provided with is many, and oil input channel is arranged at housing one middle side part; Eliminated shared space when being provided with, former oil input channel top; It is little that therefore restriction is installed, and highly versatile can be as the versatility front reduction gear housing of multiple vehicle.
Description of drawings
Fig. 1 is the schematic three dimensional views of the utility model;
Fig. 2 is the axis vertical cross-sectional schematic of the utility model;
Fig. 3 is the axial horizontal cross-sectional schematic of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Like Fig. 1, Fig. 2, shown in Figure 3; The front drive axle reducer shell of the utility model; Comprise the chamber shell, oil input channel 31, back oil road 32, the split type axle bearing seat that constitute installation cavity 2; Successively installation cavity 2 is divided into input shaft outer bearing installation cavity 21, shoe cream room 22, input shaft inner bearing installation cavity 23, differential mechanism installation cavity 24 along the retarder drive path, wherein input shaft outer bearing installation cavity 21, the 23 coaxial settings of input shaft inner bearing installation cavity and axis are positioned at split type axle bearing seat axis below; Part between oil input channel 31 two ends is isolated with installation cavity 2; Oil input channel 31 two ends are communicated with differential mechanism installation cavity 24 and shoe cream room 22 respectively; Oil input channel 31 is arranged at the middle part of chamber shell one side, and the end that is communicated with differential mechanism installation cavity 24 of oil input channel 31 is higher than the other end of oil input channel 31.
Oil input channel 31 is arranged at the middle part of chamber shell one side; Therefore near the pasta of lubricant oil in the differential mechanism installation cavity 24; In the normal vehicle operation process; The driven tooth that is connected with differential mechanism of retarder rotates counterclockwise, and therefore the viscous through lubricant oil causes that the lubricant oil liquid level rises and falls, and then makes lubricant oil overflow into oil input channel 31; Simultaneously; Input shaft outer bearing installation cavity 21, the 23 coaxial settings of input shaft inner bearing installation cavity and axis are positioned at split type axle bearing seat axis below; Also be that the input shaft axis is positioned at semiaxis axis below; The end that oil input channel 31 is communicated with differential mechanism installation cavity 24 and the other end that is higher than oil input channel 31, so lubricant oil gets into oil input channel 31 backs inflow shoe cream room 22 automatically.Therefore; Through oil input channel 31 change of position is set, oil input channel 31 is got rid of spatter the oil-feed mode and change the overflow mode that pasta rises and causes into, oil-feed is reliable and amount is big; Can guarantee to be the lubricated lubricant oil that capacity is provided of outer bearing, avoid because the outer bearing temperature continues damage and the fault that rising causes.
In order to guarantee the oil mass of lubricant oil through the oil-feed of overflow mode; Oil mass level in conjunction with gear reducer lube; Said oil input channel 31 is communicated with the axis of an end between input shaft inner bearing installation cavity 23 axis and split type axle bearing seat axis with differential mechanism installation cavity 24, said oil input channel 31 is communicated with an end with shoe cream room 22 axis is positioned at input shaft inner bearing installation cavity 23 axis below.
The end that oil input channel 31 is communicated with differential mechanism installation cavity 24 is higher than the other end of oil input channel 31, and its inclination angle can be installed attitude etc. according to the oil-feed needs of reality and retarder and is provided with.But shoe cream room 22 radial dimensions are limited; Oil input channel 31 is little with the amplitude of accommodation that shoe cream room 22 is communicated with an end opening position, and therefore if oil input channel 31 is communicated with approximate the seeing in an end opening position to fix with shoe cream room 22, oil input channel 31 inclination angles are big more; It is high more that oil input channel 31 and differential mechanism installation cavity 24 are communicated with an end; Oil input channel 31 is bigger with the pasta spacing, oil inlet quantity is more little, and lubricant oil flowing oil input channel 31 in is smooth and easy more, delay is few more, and differential mechanism installation cavity 24 interior oil masses are many more; The inclination angle is more little, and it is low more that oil input channel 31 and differential mechanism installation cavity 24 are communicated with an end, and the oil inlet quantity of oil input channel 31 is big more, and lubricant oil flowing in oil input channel 31 be slower, it is many more to be detained, and differential mechanism installation cavity 24 interior oil masses are few more.Therefore; In order to obtain the balance that an oil mass is distributed between the two at differential mechanism installation cavity 24 and shoe cream room 22; Guarantee that simultaneously lubricant oil all can get into oil input channel 31 smoothly under various travelling states, best, said oil input channel 31 axis and input shaft inner bearing installation cavity 23 axis angles are 10 °~14 °; In instance as shown in the figure, axis angle is specially 12 °.
The input shaft outer bearing is less than inner bearing; In the course of the work, the suction of inner bearing is bigger, and lubricant oil is sucked by inner bearing more easily; Cause the lubricant oil of outer bearing not enough; Therefore further, said shoe cream room 22 bottoms are provided with coaxial with it and are fixed on the oily wall 4 of the ring-like retaining of semicircle on the shell of chamber, and said oil input channel 31 is communicated with the shoe cream room between oily wall 4 of retaining and the input shaft outer bearing installation cavity 21 22.Fit into oil duct 31 and be communicated with an end axis with shoe cream room 22 and be positioned at input shaft inner bearing installation cavity 23 axis belows,, make more lubricating oil flow to outer bearing, guarantee the sufficient lubrication of outer bearing through keeping off stopping of oily wall 4.
The main purpose of back oil road 32 is to constitute the circulation of lubricant oil, and it can adopt any existing mode.In instance as shown in the figure; Said back oil road 32 is arranged on shell bottom, chamber; Part between back oil road 32 two ends is isolated with installation cavity 2, two ends are communicated with input shaft outer bearing installation cavity 21 and differential mechanism installation cavity 24 respectively; The bottom is provided with and can guarantees that the lubricant oil pasta all is higher than back oil road 32 in differential mechanism installation cavity 24, the input shaft outer bearing installation cavity 21, therefore can guarantee that input shaft outer bearing installation cavity 21 contains the lubricant oil of certain pasta level through the pasta level in the differential mechanism installation cavity 24; The opening that back oil road 32 is communicated with an end with differential mechanism installation cavity 24 is greater than the other end opening; Flow when further restriction lubricant oil gets into back oil road 32 by input shaft outer bearing installation cavity 21; Therefore the setting through above-mentioned back oil road 32; Further guarantee under various travelling states such as upward slope, descending the oil mass of lubricant oil in shoe cream room 22, the input shaft outer bearing installation cavity 21, guaranteed the lubricated of outer bearing.
In order further to make things convenient for oil-feed; Said oil input channel 31 is arranged at the corresponding side that the driven tooth that retarder links to each other with differential mechanism is installed of chamber shell; Oil input channel 31 is communicated with an end with differential mechanism installation cavity 24 opening is positioned at differential mechanism installation cavity 24 is communicated with an end with the end face of input shaft inner bearing installation cavity 23 adjacent ends, with shoe cream room 22 opening and is positioned at shoe cream room 22 sides; This moment, oil input channel 31 was communicated with the aperture position lubricant oil liquid level fluctuating maximum of an end, oil-feed most convenient with differential mechanism installation cavity 24.Simultaneously, oil input channel 31 is arranged at housing one middle side part, has eliminated shared space when being provided with, existing reducer shell oil input channel top; And the axial both sides of housing input shaft; One side width of the driven tooth that corresponding installation retarder links to each other with differential mechanism is greater than opposite side; Oil input channel 31 is arranged at the corresponding side that the driven tooth that retarder links to each other with differential mechanism is installed of chamber shell, can further facilitate the setting of oil input channel 31, the shared space of minimizing front drive axle reducer shell; And the gap that takes up room can reduce the interference probability, restriction is installed; Increase degrees of freedom is installed, therefore can be as the versatility front reduction gear housing of multiple vehicle, highly versatile.Oil input channel 31 is arranged at the corresponding side that the driven tooth that retarder links to each other with differential mechanism is installed of chamber shell; Cooperate above-mentioned differential mechanism installation cavity 24 1 ends between input shaft inner bearing installation cavity 23 axis and split type axle bearing seat axis; This moment, oil input channel 31 was communicated with the top that an end opening is positioned at driving tooth, driven tooth engaging position, oil-feed most convenient with differential mechanism installation cavity 24.
In order to further facilitate the oil-feed of oil input channel 31, said oil input channel 31 is tapered channels, and the cross section that is communicated with an end with differential mechanism installation cavity 24 is greater than the other end; Said oil input channel 31 both ends opens all adopt the horn mouth that adapts with corresponding cross section.
The oil hole of existing housing is provided with usually with the back of the body and covers 13 tops, receives spatial limitation, operating difficulties during oiling.Oiling for ease, said oil input channel 31 is provided with oil hole 33, the side oiling, the operating space is big, and is therefore easy to operate.Drain oil is arranged on differential mechanism installation cavity 24 bottoms with existing identical.
The setting of the form that is provided with of chamber shell and oil input channel 31, back oil road 32 does not have necessary relation, so the chamber shell can adopt existing split type structure.But further; Said chamber shell comprises upper body 11, lower case 12; Wherein the separating surface of upper body 11, lower case 12 was a split type axle bearing seat axis and perpendicular to the plane of input shaft inner bearing installation cavity 23 axis; And upper body 11, lower case 12 integrally casting moulding can effectively improve the installation precision and the quality of fit of driving and driven tooth of retarder and differential mechanism through the integrally casting moulding; During assembling; Only need handle that the back of the body covers 13, the sealing between input shaft end cap and the chamber shell; The back of the body covers 13, all non-staple load parts of input shaft end cap; Leakage probability in the using process is little, therefore can effectively avoid chamber shell self leakage in use through the integrally casting moulding, can effectively guarantee whole sealability.
Further; Split type axle bearing seat comprises limited ring 14, the seat of honour 16 and following 15; And the split surface between the seat of honour 16 and following 15 is the separating surface of upper body 11, lower case 12; Wherein limited ring 14 and following 15 and chamber shell integrally casting moulding, the seat of honour 16 is for passing through bolt and following 15 absolute construction that is fixedly connected.Avoided limited ring 14 is set to split type, further improved sealability, when adjustment differential mechanism backlash, the adjustment pad contacts with limited ring 14 simultaneously, and whole stressed, stressed even.