CN104728387A - Three-fork-shaft-type noncircular bevel gear limited slip differential - Google Patents
Three-fork-shaft-type noncircular bevel gear limited slip differential Download PDFInfo
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- CN104728387A CN104728387A CN201510138418.3A CN201510138418A CN104728387A CN 104728387 A CN104728387 A CN 104728387A CN 201510138418 A CN201510138418 A CN 201510138418A CN 104728387 A CN104728387 A CN 104728387A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
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Abstract
The invention provides a three-fork-shaft-type noncircular bevel gear limited slip differential which is simple in structure, low in cost and high in strength. The three-fork-shaft-type noncircular bevel gear limited slip differential is provided with a differential shell, a left noncircular bevel half shaft gear, a right noncircular bevel half shaft gear and three noncircular bevel planetary gears. The left noncircular bevel half shaft gear is installed in a left half shell of the differential shell. The right noncircular bevel half shaft gear is installed in a right half shell of the differential shell. The three noncircular bevel planetary gears are installed in the differential shell through a three-fork shaft. The three-fork shaft is in a Y shape with three branch shafts. The three branch shafts are evenly distributed at equal angles. The three noncircular bevel planetary gears are meshed with the left noncircular bevel half shaft gear and the right noncircular bevel half shaft gear. The number of teeth of the noncircular bevel planetary gears, the number of teeth of the left noncircular bevel half shaft gear and the number of teeth of the right noncircular bevel half shaft gear are the same.
Description
Technical field
The present invention relates to a kind of limited-slip differential, particularly relate to a kind of slip-limiting differential mechanism with noncircular bevel gear of trident shaft type.
Background technique
Current, automobile becomes conventional means of transportation gradually, and self-driving travel more and more becomes the travel mode that people pursue, and the common car in area is difficult to travel in mountain area etc., and therefore go-anywhere vehicle becomes the first choice of some people.
Because offroad vehicle will through muddy, soft surface even cross-country locality traveling of being everlasting, passing ability is one of its most important performance index.Differential mechanism is as the vitals of automobile, and its effect is distribution of torque between two output shafts, and ensures that two output shafts likely rotate with different angular velocity, and its form and performance are directly connected to the passing ability of car load.
At present, China's offroad vehicle ransaxle also generally adopts symmetrical cone gear differential mechanism, and its two-semiaxle gear size is identical, can distribute to left and right driving wheel by a rough average for torque.When automobile travels on good road, no matter such distribution can both meet for straight-line travelling or turning driving.But when single wheel is in the very little smooth ground of coefficient of attachment, although there is good attachment on opposite side wheel and ground, also cannot plays potential tractive force, cause automobile to travel.
The approach solved the problem adopts anti-slip differential device, increases locking coefficient.Common method mainly contains as follows.
(1) differential lock, when a wheel is in the less road surface of adhesion, differential lock can be handled differential carrier and semiaxis are locked together, differential mechanism is made not play differential action, now locking coefficient is ∞, left and right adhesion of taking turns can be made full use of like this, make the maximum value that tractive force reaches possible.Sail the section that is difficult to walk in automobile running before, differential lock can be handled differential mechanism is pinned, after crossing the section that is difficult to walk, but, should in time differential lock be unclamped, to avoid the adverse consequences occurred because indifferential effect brings.
(2) friction type differential, its principle utilizes the internal friction of mechanical component in differential mechanism to increase locking coefficient.This differential design is complicated, and requirement on machining accuracy is high, easy to wear.Owing to need do larger change to drive axle body structure, therefore generally cannot install on the vehicle of having shaped, its Applicable scope is restricted.
(3) free wheel type differential mechanism, free wheel type differential mechanism carries out work according to the speed discrepancy of left and right wheels, makes left and right semiaxis moment of torsion mutually without impact.When single wheel skids, it can automatically drive the semiaxis of wheel to separate with differential mechanism by turning soon, allows fast runner freely rotate, and all torsion torque is all passed to slow-speed driving wheel.Shortcoming is complex structure, wearing and tearing and impulse ratio more serious.
(4) gear ratio differential mechanism, differential bevel wheel is secondary according to variable ratio, then under the prerequisite not changing ransaxle general structure, the barrier effect of variable ratio transmission can be relied on to increase its locking coefficient, improve the cross-country passing ability of vehicle.The pattern occurred the earliest is velocity ratio period of change is a circular pitch (Liu Weixin, automotive axle design [M], Beijing: publishing house of Tsing-Hua University, 2004, Chinese patent ZL89100102.6, a kind of drive ratio-changing differential mechanism), namely, velocity ratio change realizes by a pair conjugate tooth profile, if gear has N number of tooth, then gear turns around, velocity ratio just changes N number of cycle, for keeping transmission continuity, namely require that contact ratio is greater than 1, the gear number of teeth just can not be very little, therefore, in transmission process, period of change is too many, frequency is too high, and it is too little to change amplitude.Three circular pitch non-conical compensating gear (Chinese patents: ZL01131791.4 were there are afterwards, differential mechanism with variable transmission ratio and eliminating slip), that is, velocity ratio realizes by three pairs of conjugate tooth profiles, and the gear number of teeth adopts the multiple of 3, comparative maturity be designed to 3:4, (planetary pinion 9 teeth, differential gear 12 teeth), small gear turns around, velocity ratio changes 3 cycles, and the theoretical locking coefficient of differential mechanism can reach 1.857.But in these gear ratio differential mechanisms, the intensity of gear is low, damage working life.
Summary of the invention
The object of the invention is the slip-limiting differential mechanism with noncircular bevel gear proposing the trident shaft type that a kind of structure is simple, cost is low, intensity is high for the technological deficiency existed in prior art.
Following technological scheme is adopted for realizing object of the present invention.
The slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 1, there is differential casing, left non-conical differential gear, right non-conical differential gear and 3 non-conical planetary pinions, described left non-conical differential gear is arranged in a left side half housing of described differential casing, described right non-conical differential gear is arranged in the right side half housing of described differential casing, 3 described non-conical planetary pinions are arranged in described differential casing by trident shaft, described trident shaft is formed as the Y-shaped with 3 branched shaft, 3 described branched shaft separate identical even angle distribution, 3 described non-conical planetary pinions engage with described left non-conical differential gear and described right non-conical differential gear, the planetary number of teeth of described non-conical, the number of teeth of described left non-conical differential gear and the number of teeth of described right non-conical differential gear identical.
The slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 2, in the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 1, described left non-conical differential gear and the velocity ratio rule between described right non-conical differential gear and described non-conical planetary pinion according to
setting, wherein: i
34for described left non-conical differential gear and described right non-conical differential gear and the planetary velocity ratio of described non-conical, z
3, z
4be respectively described left non-conical differential gear and described right non-conical differential gear and the planetary number of teeth of described non-conical,
for the planetary corner of described non-conical, c is constant, and its scope is 0 ~ 0.5.
The slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 3, in the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 1 or 2, described non-conical planetary pinion, described left non-conical differential gear and described right non-conical differential gear have 9 teeth respectively.
Compared with prior art, the present invention has following beneficial effect.
According to the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 1, there is left non-conical differential gear, right non-conical differential gear and 3 non-conical planetary pinions, by trident shaft, non-conical planetary pinion is arranged in differential casing, and engage with differential gear, in addition, by planetary for the non-conical number of teeth, the number of teeth of left non-conical differential gear and the number of teeth of right non-conical differential gear are set to identical, by using non-conical gear, and the number of teeth of pitch wheel is set to identical, the locking coefficient of differential mechanism can be increased better, increase coupling mechanism force, improve the transmission to the tractive force of go-anywhere vehicle, more be easy to offroad vehicle muddy, soft surface even cross-country locality travels.In addition, the number of teeth of gear is identical, and therefore easy to process, cost is low.And the compact structure formed like this, load diatibution is reasonable, under the prerequisite keeping larger locking coefficient, can significantly improve the structural strength of limited-slip differential.
According to the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 2, velocity ratio is set according to above-mentioned formula, can gear revolve turn around time, make velocity ratio change three cycles, ensure that the continuity of transmission.
According to the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of technological scheme 3, the number of teeth of non-conical planetary pinion, left non-conical differential gear and right non-conical differential gear is set to 9.When ensureing distribution, structure can be made compacter, and farthest can improve the performance of limited-slip differential by arranging 9 teeth.By so special mechanism, can overcome that the root caused because the number of teeth is few is cut, topping, contact ratio be less than the defect such as 1.
Accompanying drawing explanation
Fig. 1 is the decomposing schematic representation of the slip-limiting differential mechanism with noncircular bevel gear representing trident shaft type of the present invention.
Cross-sectional schematic when Fig. 2 is the non-conical gears meshing of the slip-limiting differential mechanism with noncircular bevel gear representing trident shaft type of the present invention.
Embodiment
With reference to the accompanying drawings embodiments of the present invention are described in detail.
Fig. 1 is the decomposing schematic representation of the slip-limiting differential mechanism with noncircular bevel gear representing trident shaft type of the present invention.Cross-sectional schematic when Fig. 2 is the non-conical gears meshing of the slip-limiting differential mechanism with noncircular bevel gear representing trident shaft type of the present invention.
As shown in Figure 1 and Figure 2, the slip-limiting differential mechanism with noncircular bevel gear of trident shaft type of the present invention has differential casing 10, left non-conical differential gear 20, right non-conical differential gear 30 and 3 non-conical planetary pinions 40.
Left non-conical differential gear 20 is arranged in a left side half housing 11 of differential casing 10, and right non-conical differential gear 30 is arranged in the right side half housing 12 of differential casing 10.3 non-conical planetary pinions 40 are arranged in differential casing 10 by trident shaft 50, and trident shaft 50 is formed as the Y-shaped with 3 branched shaft 51, and 3 branched shaft 51 separate identical even angle distribution.
3 non-conical planetary pinions 40 engage with left non-conical differential gear 20 and right non-conical differential gear 30, and the number of teeth of the number of teeth of non-conical planetary pinion 40, the number of teeth of left non-conical differential gear 20 and right non-conical differential gear 30 is identical.
According to the slip-limiting differential mechanism with noncircular bevel gear of above-mentioned trident shaft type, there is left non-conical differential gear, right non-conical differential gear and 3 non-conical planetary pinions, by trident shaft, non-conical planetary pinion is arranged in differential casing, and engage with differential gear, in addition, by planetary for the non-conical number of teeth, the number of teeth of left non-conical differential gear and the number of teeth of right non-conical differential gear are set to identical, by using non-conical gear, and the number of teeth of pitch wheel is set to identical, the locking coefficient of differential mechanism can be increased better, increase coupling mechanism force, improve the transmission to the tractive force of go-anywhere vehicle, more be easy to offroad vehicle muddy, soft surface even cross-country locality travels.In addition, the number of teeth of gear is identical, and therefore easy to process, cost is low.And the compact structure formed like this, load diatibution is reasonable, under the prerequisite keeping larger locking coefficient, can significantly improve the structural strength of limited-slip differential.
In addition, left non-conical differential gear and the velocity ratio rule between right non-conical differential gear and non-conical planetary pinion can be according to
setting, wherein: i
34for left non-conical differential gear and right non-conical differential gear and the planetary velocity ratio of non-conical, z
3, z
4be respectively left non-conical differential gear and right non-conical differential gear and the planetary number of teeth of non-conical,
for the planetary corner of non-conical, c is constant, and its scope is 0 ~ 0.5.
According to the slip-limiting differential mechanism with noncircular bevel gear of above-mentioned trident shaft type, velocity ratio is set according to above-mentioned formula, can gear revolve turn around time, make velocity ratio change three cycles, ensure that the continuity of transmission.
In addition, non-conical planetary pinion, left non-conical differential gear and right non-conical differential gear can have 9 teeth respectively.By arranging 9 teeth, when ensureing distribution, structure can be made compacter, and farthest can improve the performance of limited-slip differential.By so special mechanism, can overcome that the root caused because the number of teeth is few is cut, topping, contact ratio be less than the defect such as 1.Certainly, the number of teeth of non-conical planetary pinion, left non-conical differential gear and right non-conical differential gear can not be 9, but other quantity, such as 6,12,15 etc.
In addition, each embodiment above-mentioned is only a kind of mode of execution, and each embodiment above-mentioned combination in any can form various may connection, and this combination is also contained in protection scope of the present invention.
Above the slip-limiting differential mechanism with noncircular bevel gear of the trident shaft type of the preferred embodiment of the present invention is illustrated, but, the present invention is not limited to above-mentioned concrete mode of execution, only otherwise depart from the scope of claim, can carry out various distortion or change.Present invention resides in the various distortion in the scope of claim and change.
Claims (3)
1. a slip-limiting differential mechanism with noncircular bevel gear for trident shaft type, is characterized in that,
There are differential casing, left non-conical differential gear, right non-conical differential gear and 3 non-conical planetary pinions,
Described left non-conical differential gear is arranged in a left side half housing of described differential casing, and described right non-conical differential gear is arranged in the right side half housing of described differential casing,
3 described non-conical planetary pinions are arranged in described differential casing by trident shaft, and described trident shaft is formed as the Y-shaped with 3 branched shaft, and 3 described branched shaft separate identical even angle distribution,
3 described non-conical planetary pinions engage with described left non-conical differential gear and described right non-conical differential gear, the number of teeth of the planetary number of teeth of described non-conical, described left non-conical differential gear and the number of teeth of described right non-conical differential gear identical.
2. the slip-limiting differential mechanism with noncircular bevel gear of trident shaft type according to claim 1, is characterized in that, described left non-conical differential gear and the velocity ratio rule between described right non-conical differential gear and described non-conical planetary pinion according to
setting, wherein: i
34for described left non-conical differential gear and described right non-conical differential gear and the planetary velocity ratio of described non-conical, z
3, z
4be respectively described left non-conical differential gear and described right non-conical differential gear and the planetary number of teeth of described non-conical,
for the planetary corner of described non-conical, c is constant, and its scope is 0 ~ 0.5.
3. the slip-limiting differential mechanism with noncircular bevel gear of trident shaft type according to claim 1 and 2, is characterized in that, described non-conical planetary pinion, described left non-conical differential gear and described right non-conical differential gear have 9 teeth respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138418.3A CN104728387B (en) | 2015-03-27 | 2015-03-27 | The slip-limiting differential mechanism with noncircular bevel gear of trident shaft type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510138418.3A CN104728387B (en) | 2015-03-27 | 2015-03-27 | The slip-limiting differential mechanism with noncircular bevel gear of trident shaft type |
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| Publication Number | Publication Date |
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| CN104728387A true CN104728387A (en) | 2015-06-24 |
| CN104728387B CN104728387B (en) | 2017-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102630410B1 (en) * | 2023-06-09 | 2024-01-29 | 송길봉 | A gear device in which a gear shaft and gear tube are combined into an integral structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658705A1 (en) * | 1993-12-15 | 1995-06-21 | Henry Dangel | Speed-reducing mechanism and transmission device with two ranges for a motor vehicle |
| CN1418784A (en) * | 2001-11-14 | 2003-05-21 | 王小椿 | Differential mechanism with variable transmission ratio and eliminating slip |
| CN1487222A (en) * | 2003-08-18 | 2004-04-07 | 中国人民解放军军事交通学院 | Anti-skid differential with adaptive speed ratio |
| CN101886695A (en) * | 2010-08-10 | 2010-11-17 | 中国人民解放军军事交通学院 | Slip-limiting differential mechanism with noncircular bevel gear |
-
2015
- 2015-03-27 CN CN201510138418.3A patent/CN104728387B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0658705A1 (en) * | 1993-12-15 | 1995-06-21 | Henry Dangel | Speed-reducing mechanism and transmission device with two ranges for a motor vehicle |
| CN1418784A (en) * | 2001-11-14 | 2003-05-21 | 王小椿 | Differential mechanism with variable transmission ratio and eliminating slip |
| CN1487222A (en) * | 2003-08-18 | 2004-04-07 | 中国人民解放军军事交通学院 | Anti-skid differential with adaptive speed ratio |
| CN101886695A (en) * | 2010-08-10 | 2010-11-17 | 中国人民解放军军事交通学院 | Slip-limiting differential mechanism with noncircular bevel gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102630410B1 (en) * | 2023-06-09 | 2024-01-29 | 송길봉 | A gear device in which a gear shaft and gear tube are combined into an integral structure |
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| CN104728387B (en) | 2017-06-30 |
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Address after: 300161 No.1, dongjuzi, Chenglin Road, Hedong District, Tianjin Patentee after: ARMY MILITARY TRANSPORTATION University Address before: No.1, dongjuzi, Hedong District, Tianjin, 300361 Patentee before: Military Transportation University of PLA |
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