CN103742621A - Worm gear universal joint differential mechanism - Google Patents
Worm gear universal joint differential mechanism Download PDFInfo
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- CN103742621A CN103742621A CN201310756940.9A CN201310756940A CN103742621A CN 103742621 A CN103742621 A CN 103742621A CN 201310756940 A CN201310756940 A CN 201310756940A CN 103742621 A CN103742621 A CN 103742621A
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- worm
- gear
- worm screw
- semiaxis
- shaft
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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
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/28—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears
- F16H48/29—Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears with self-braking intermeshing gears having perpendicular arranged axes and having worms or helical teeth
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention discloses a worm gear universal joint differential mechanism. Transmission of a double cardan universal joint is characterized in that the double cardan universal joint can revolve but cannot rotate by fixing an optional end and enabling the other end to revolve around the fixed end, and the characteristic is just used for the unlocking and steering process of a worm gear mechanism, so that a vehicle is capable of steering without slipping.
Description
Technical field
The invention belongs to a kind of mechanical transmission box of tricks, be specifically related to a kind of differential mechanism that utilizes mechanical single-direction transmission to realize self-locking.
Differential mechanism is mainly used in the transmission system of automobile, and when left and right sidesing driving wheel exists speed discrepancy, the torque that differential mechanism is distributed to slow-speed driving wheel is greater than the torque that turns soon driving wheel.Common differential mechanism is divided into compensating gear and limited-slip differential (Limi ted Slip Differential is called for short LSD).
Compensating gear can meet the torque distribution characteristic that automobile normally travels in good road surface.But while travelling on automobile Huai road, but have a strong impact on passing capacity, for example, when a driving wheel of automobile is absorbed in muddy road surface, although another driving wheel is in good road surface, but the feature because of the torque of compensating gear mean allocation, make this driving wheel also can only assign to the torque with the driving wheel equivalent of trackslipping, so that driving force is not enough to overcome running resistance, automobile can not advance.
In order to address the above problem, on some offroad vehicle and limousine, install limited slip differential, limited slip differential can be so that when trackslip on a side drive wheel Huai road, can make the even whole torques of major part pass to the driving wheel in good road surface, to make full use of the adhesion of this driving wheel, produce enough driving forces, make automobile start to walk smoothly or continue to travel.
The structure of existing anti-limited-slip differential is as described to some extent in US Patent No. 2859641, this differential mechanism comprises a casing that can be driven by driving source, a pair of power output gear is rotatable to be installed in housing, and arrange by transmission of power to different points, the transmission gear that a pair of diameter is less than or equal to power output gear is installed in housing, and design and power output gear effect, balance gear and each transmission gear and diameter engagement mutually, power output gear is worm screw, and it is worm gear that power transmits tooth.This differential mechanism middle gear can produce slight shift in position when manufacturing and assemble, and this causes the slightly misaligned of Gear combination when engagement, this slightly misaligned may jeopardize this load side gear optimum balance, and may cause being enough to the bad wearing and tearing of load unbalanced generation and or noise problem.
Above-mentioned differential mechanism utilizes worm and worm wheel transmission, belong to friction driving, wearing and tearing in transmission process between worm gear and worm screw are larger, working life is shorter, and in assembly process to worm gear, worm screw arrangement, production technology all has higher requirement: and the worm screw in above-mentioned patent is directly connected on semiaxis, worm screw, is furnished with a plurality of worm gears around, causes that the manufacture process requirement of worm gear and worm screw is very high and assembling difficulty is larger.
Summary of the invention
The object of the invention is for deficiency of the prior art, a kind of low cost of manufacture is provided, interlocks effective differential mechanism.
The present invention is another transport characteristics that utilizes double cardan universal joint: be exactly that fixing any one end makes the other end can rotate around this end revolution but can not rotation, this feature is just being used on the release steering procedure of worm-and-wheel gear of the present invention.Reach the not only non-slip but also object that can turn to of vehicle.
Worm and gear universal joint differential mechanism, comprises four kinds of technological schemes:
The first technological scheme is characterised in that: on a left side, semiaxis worm screw is set on right axle shaft, at two semiaxis worm screw places, be symmetrical arranged two with the worm shaft of worm screw again, worm screw on two worm shafts and semiaxis worm screw be left-handed and dextrorotation intermeshing each other, the diameter that can reduce like this differential mechanism increases output torque and offsets the end thrust of two worm screws, by two, it is one group again, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear interfixing, respectively with semiaxis worm screw and worm shaft on worm meshing, a left side is set again, right two axle shaft housings, by semiaxis worm screw, worm shaft and worm gear are contained in respectively a left side, on the housing of right axle shaft shell, by the same end of two worm shafts extend to axle shaft housing external arrange two gears and engagement, a gear hub is set again as differential carrier, intermeshing two gears are contained in gear hub, power is inputted by gear hub.This technological scheme can be used single start worm and make locking power reach 100%.
The second technological scheme is characterised in that: left and right two axle shaft housings of the first technological scheme are connected and fix and form a differential carrier that has San Geke chamber, left, center, right, left and right half worm shaft is extended to mesochite chamber, two double cardan universal joints are set in mesochite chamber again, link with left and right half worm shaft and two worm shafts respectively in the two ends of two double cardan universal joints.This technological scheme also can be used single start worm and make locking power reach 100%, but needs the joint part of universal joint very close to each other.
The third technological scheme is characterised in that: in the longitudinal center line both sides of differential carrier, Parallel Symmetric arranges two with the worm shaft of worm screw, left-handed and the dextrorotation each other of worm screw on two worm shafts is also intermeshing or do not mesh, the heterodoxy of two worm shafts is by two double cardan universal joints and a left side, right axle shaft interlock, on the housing of the corresponding differential carrier of the worm screw of two worm shafts, arranging two is one group again, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear interfixing respectively with two worm shafts on worm meshing, or using the heterodoxy of two worm shafts extend to differential carrier external respectively with double cardan universal joint interlock as semiaxis.This technological scheme can not used single start worm to have certain lockup capacity.
The 4th kind of technological scheme is characterised in that: using two double cardan universal joints as left and right half, at the longitudinal center line both sides of differential carrier Parallel Symmetric, two gears engagement are set, the heterodoxy of the axle of two gears extend respectively differential carrier external respectively with the interlock of left and right two duplexs joint.This technological scheme is simple in structure, volume is little, cost is low, but there is no latch functions.
Accompanying drawing explanation
Fig. 1 is embodiment 1 view
Fig. 2 is the internal structure view of Fig. 1
Fig. 3 is embodiment 2 view
Fig. 4 is the internal structure view of Fig. 3
Fig. 5 is embodiment 3 view
Fig. 6 is the internal structure view of Fig. 5
Fig. 7 is embodiment 4 view
Fig. 8 is the internal structure view of Fig. 7
In figure: 1 differential carrier 2 worm gear 3 left half axle housing 4 right axle shaft shells
5 right axle shaft worm screw 6 left half axle worm screw 7 gear 8 worm shafts
9 double cardan universal joint 10 gear 11 bearing positions
12 actuation gear flange plate 13 double cardan universal joints
Embodiment
The embodiment of the first technological scheme is as Fig. 1, 2, on a left side, semiaxis worm screw 5 is set on right axle shaft, 6, then two semiaxis worm screws 5, 6 places are symmetrical arranged two with worm screw and semiaxis worm screw 5 on 8, two worm shafts 8 of worm shaft of worm screw, 6 is single start worm, and left-handed and dextrorotation and intermeshing each other, the diameter that can reduce like this differential mechanism increases output torque and offsets the end thrust of two worm screws, then is one group by two, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear 2 interfixing, respectively with semiaxis worm screw 5, 6 and worm shaft 8 on worm meshing, then a left side is set, right two axle shaft housings 3, 4, by semiaxis worm screw 5, 6, worm shaft 8 and worm gear 2 are contained in respectively a left side, right axle shaft shell 3, on 4 housing, the same end of two worm shafts 8 is extended to a left side, right axle shaft shell 3, 4 external two gears 7 that arrange also mesh, then a gear hub are set as differential carrier 1, and intermeshing two gears 7 are contained in gear hub, and power is inputted by gear hub.This embodiment's bearing position 11 arranges two bearings
Power is inputted by differential carrier 1, by the engaging piece of two gears 7 as power fulcrum, arrive again worm gear 2, arrive again left, right axle shaft worm screw 5, 6, the semiaxis worm screw 5 in outside when Vehicular turn, 6 rotating speed is greater than inner side semiaxis worm screw 5, 6 rotating speed, left, right two worm mechanisms will link, two worm gear 2 of inner side can revolve round the sun by the worm screw around inner side in rotation, the worm tooth that two worm gear 2 in outside will revolve round the sun also and on worm shaft 8 in rotation drives the semiaxis worm screw in outside, thereby realize differential steering, it is left when single wheel is unsettled or keep straight on, right two worm-and-wheel gears because of cannot release just as a bearing, so this embodiment does not just have the possibility of wheel-slip.
The embodiment of the second technological scheme is as Fig. 3,4, left and right two axle shaft housings 3,4 of the first technological scheme are connected and fix and form a differential carrier 1 that has San Geke chamber, left, center, right, left and right half worm screw 5,6 axles are extended to mesochite chamber, link with left and right half worm screw 5,6 axles and two worm shafts 8 respectively in the two ends that 13, two double cardan universal joints 13 of two double cardan universal joints are set in mesochite chamber again.Worm screw in this embodiment on 5,6 and two worm shafts 8 of semiaxis worm screw is single start worm, does not have engagement and the modulus of left and right half worm screw 5,6 to be greater than the modulus of two worm screws on worm shaft 8.
Power is inputted by differential carrier 1, again to four worm gear 2 again to two worm shafts 8, outside when Vehicular turn, semiaxis worm screw rotating speed is greater than inner side semiaxis worm screw rotating speed, interior outside worm screw is linked and release mutually by two universal joints 13 and two worm shafts 8 simultaneously, left, right two worm mechanisms will link, two worm gear 2 of inner side can revolve round the sun by the semiaxis worm screw around inner side in rotation, the worm tooth that two worm gear 2 in outside will revolve round the sun also and on worm shaft 8 in rotation drives the semiaxis worm screw in outside, and realize release, turn to, it is left when single wheel is unsettled and keep straight on, so right two worm-and-wheel gears are not because cannot release just there is no the possibility of wheel-slip just as this embodiment of bearing.
The embodiment of the third technological scheme is as Fig. 5, 6, at the longitudinal center line both sides of differential carrier 1 Parallel Symmetric, arrange two with the worm shaft 8 of worm screw, worm screw on two worm shafts 8 is left-handed and dextrorotation intermeshing each other, the heterodoxy of two worm shafts 8 is by two double cardan universal joints 9 and a left side, right axle shaft interlock, on the housing of the corresponding differential carrier 1 of the worm screw of two worm shafts 8, arranging two is one group again, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear 2 interfixing respectively with two worm shafts 8 on worm meshing, or using the heterodoxy of two worm shafts 8 extend to differential carrier 1 external respectively with double cardan universal joint 9 interlock as semiaxis.
Power is inputted by differential carrier 1, to two worm gear 2, to two worm shafts 8, arrive again left and right double cardan universal joint 9 more again, when Vehicular turn, outboard wheels rotating speed is greater than inboard wheel rotating speed, and now the one end due to inner side double cardan universal joint 9 does not have rotation to realize differential steering around the other end revolution.
The embodiment of the 4th kind of technological scheme is as Fig. 7,8, using two double cardan universal joints 9 as left and right half, at the longitudinal center line both sides of differential carrier 1 Parallel Symmetric, two gears 10 engagement are set, the heterodoxy of the axle of two gears 10 extend respectively differential carrier 1 external respectively with left and right two duplexs joint, 9 interlocks.
When power is input to two gears by differential carrier 1, work as Ackermann steer angle outboard wheels rotating speed again to two double cardan universal joints 9 and be greater than inboard wheel rotating speed, now the one end due to inner side double cardan universal joint 9 does not have rotation to realize differential steering around the other end revolution.
Claims (4)
1. worm and gear universal joint differential mechanism, it is characterized in that: on a left side, semiaxis worm screw is set on right axle shaft, at two semiaxis worm screw places, be symmetrical arranged two with the worm shaft of worm screw again, left-handed and the dextrorotation each other of worm screw on two worm shafts and semiaxis worm screw is also intermeshing or do not mesh, by two, it is one group again, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear interfixing, respectively with semiaxis worm screw and worm shaft on worm meshing, a left side is set again, right two axle shaft housings, by semiaxis worm screw, worm shaft and worm gear are contained in respectively a left side, on the housing of right axle shaft shell, by the same end of two worm shafts extend to axle shaft housing external arrange two gears and engagement, a gear hub is set again as differential carrier, intermeshing two gears are contained in gear hub, power is inputted by gear hub.
2. worm and gear universal joint differential mechanism according to claim 1, it is characterized in that: left and right two axle shaft housings are connected and fix and form a differential carrier that has San Geke chamber, left, center, right, left and right half worm shaft is extended to mesochite chamber, two double cardan universal joints are set in mesochite chamber again, link with left and right half worm shaft and two worm shafts respectively in the two ends of two double cardan universal joints.
3. according to right 1, worm and gear universal joint differential mechanism described in 2, it is characterized in that: in the longitudinal center line both sides of differential carrier, Parallel Symmetric arranges two with the worm shaft of worm screw, left-handed and the dextrorotation each other of worm screw on two worm shafts is also intermeshing or do not mesh, the heterodoxy of two worm shafts is by two double cardan universal joints and a left side, right axle shaft interlock, on the housing of the corresponding differential carrier of the worm screw of two worm shafts, arranging two is one group again, left-handed and dextrorotation each other, concentric, the number of teeth is identical, the worm gear interfixing respectively with two worm shafts on worm meshing, or using the heterodoxy of two worm shafts extend to differential carrier external respectively with double cardan universal joint interlock as semiaxis.
4. worm and gear universal joint differential mechanism according to claim 3, it is characterized in that: using two double cardan universal joints as left and right half, at the longitudinal center line both sides of differential carrier Parallel Symmetric, two gears engagement are set, the heterodoxy of the axle of two gears extend respectively differential carrier external respectively with the interlock of left and right two duplexs joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756940.9A CN103742621A (en) | 2013-12-30 | 2013-12-30 | Worm gear universal joint differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756940.9A CN103742621A (en) | 2013-12-30 | 2013-12-30 | Worm gear universal joint differential mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN103742621A true CN103742621A (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310756940.9A Pending CN103742621A (en) | 2013-12-30 | 2013-12-30 | Worm gear universal joint differential mechanism |
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| Country | Link |
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| CN (1) | CN103742621A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859438A (en) * | 2015-03-25 | 2015-08-26 | 魏家斌 | Locking worm and gear drive axle with universal joint |
| CN107387717A (en) * | 2017-06-15 | 2017-11-24 | 大连理工大学 | Universal joint worm-gear self-locking differential mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170878A (en) * | 1998-12-09 | 2000-06-23 | Viscodrive Japan Kk | Differential gear |
| CN101008437A (en) * | 2006-08-13 | 2007-08-01 | 田贞洪 | Active differential mechanism |
| CN103388667A (en) * | 2012-05-12 | 2013-11-13 | 重庆茂田机械有限公司 | Differential deceleration system with inlaid structure |
| CN103453106A (en) * | 2013-09-02 | 2013-12-18 | 魏家斌 | Differential |
| CN203703046U (en) * | 2013-12-30 | 2014-07-09 | 魏家斌 | Differential mechanism of worm and gear cardan joint |
-
2013
- 2013-12-30 CN CN201310756940.9A patent/CN103742621A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000170878A (en) * | 1998-12-09 | 2000-06-23 | Viscodrive Japan Kk | Differential gear |
| CN101008437A (en) * | 2006-08-13 | 2007-08-01 | 田贞洪 | Active differential mechanism |
| CN103388667A (en) * | 2012-05-12 | 2013-11-13 | 重庆茂田机械有限公司 | Differential deceleration system with inlaid structure |
| CN103453106A (en) * | 2013-09-02 | 2013-12-18 | 魏家斌 | Differential |
| CN203703046U (en) * | 2013-12-30 | 2014-07-09 | 魏家斌 | Differential mechanism of worm and gear cardan joint |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859438A (en) * | 2015-03-25 | 2015-08-26 | 魏家斌 | Locking worm and gear drive axle with universal joint |
| CN107387717A (en) * | 2017-06-15 | 2017-11-24 | 大连理工大学 | Universal joint worm-gear self-locking differential mechanism |
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Application publication date: 20140423 |