CN108397535B - Reverse transmission device and differential mechanism - Google Patents
Reverse transmission device and differential mechanism Download PDFInfo
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- CN108397535B CN108397535B CN201710064357.XA CN201710064357A CN108397535B CN 108397535 B CN108397535 B CN 108397535B CN 201710064357 A CN201710064357 A CN 201710064357A CN 108397535 B CN108397535 B CN 108397535B
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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
- F16H48/12—Differential gearings without gears having orbital motion
- F16H48/14—Differential gearings without gears having orbital motion with cams
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/08—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
- F16D41/10—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
- F16D41/105—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing the intermediate members being of circular cross-section, of only one size and wedging by rolling movement not having an axial component between inner and outer races, one of which is cylindrical
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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
- F16H48/38—Constructional details
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Abstract
The invention provides a reverse drive and a differential, wherein the reverse drive comprises: a first end plate having a first through hole and a second end plate having a second through hole; the first eccentric shaft and the second eccentric shaft respectively comprise a first shaft section, a second shaft section and a third shaft section; the first shaft section of the first eccentric shaft is movably arranged in the first through hole, and the first shaft section of the second eccentric shaft is movably arranged in the second through hole; the first sliding structure and the second sliding structure respectively comprise a sliding block and a sliding block bracket, the sliding block is provided with a third through hole, and the sliding block bracket is provided with a fourth through hole; the third through hole and the fourth through hole of the first sliding structure are movably mounted with one of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft; the third and fourth through holes of the second sliding structure are movably mounted with the other of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft. The reverse transmission device and the differential mechanism have simple structures and low cost.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a reverse transmission device and a differential mechanism.
Background
When the automobile turns, the turning radius of the inner wheel is different from that of the outer wheel, and the turning radius of the outer wheel is larger than that of the inner wheel, so that the rotating speed of the outer wheel is required to be higher than that of the inner wheel during turning, and unnecessary power consumption and tire wear are reduced. The automobile differential is used as a main part of a drive axle and mainly has the main function of allowing the half shafts on the two sides to rotate at different rotating speeds while transmitting power to the half shafts on the two sides, so that wheels on the two sides can run in an unequal distance in a pure rolling mode as far as possible.
Fig. 1 shows a schematic structure of a conventional differential in the prior art, which includes: planetary gears 110, left and right side gears 120, and a carrier 130. One end of the transmission shaft 140 is provided with a driving gear 150, and is engaged with a driven gear 160 on the gear rack 130 through the driving gear 150, and the driving gear 150 has a small radius, so that the purpose of speed reduction and distance increase can be achieved in the process of transmitting power from the driving gear 150 to the driven gear 160 with a large radius ratio.
When the vehicle is traveling straight, the torque and rotational speed of the left and right side gears 120 are the same, and the planetary gears 110 are not rotating. When the vehicle runs into a curve, the resistance of the inner side wheel is larger than that of the outer side wheel, and the torque of the left half shaft gear 120 and the torque of the right half shaft gear 120 are different, so that the rotation of the planetary gear 120 is caused, the planetary gear 120 can give a resistance torque to the inner side half shaft gear 120 to realize speed reduction, and can also give a power torque to the outer side half shaft gear 120 to realize speed increase, so that the outer side half shaft gear 120 has a higher rotation speed than the inner side half shaft gear 120, and smooth curve can be realized.
However, the differential mechanism has disadvantages that, for example, when the wheels are suspended to cause idle running, the differential mechanism may continuously transmit power to the idle wheels without resistance, the vehicle cannot move forward, and a large amount of power is lost. Therefore, the prior art also proposes a Limited Slip Differential (LSD), which can be subdivided into various forms such as a torsion induction type, a viscous coupling type, a helical gear type, a standard mechanical type and the like according to the different implementation modes and the different machine part structures. The limited slip differential can ensure that the left wheel and the right wheel run together when in work, and the rotating speed difference of the left wheel and the right wheel is controlled within a certain range so as to ensure the normal running of the vehicle.
However, both the conventional differential and the limited slip differential described above employ bevel gears, which have problems of complicated structure, high manufacturing cost, and the like.
Disclosure of Invention
The invention solves the problems that the reverse transmission device or the differential mechanism in the prior art has complex structure and high manufacturing cost.
To solve the above problems, an embodiment of the present invention provides a reverse transmission device. The reverse drive device includes: the first end plate is provided with a first through hole, and the second end plate is opposite to the first end plate and is provided with a second through hole; the first eccentric shaft and the second eccentric shaft respectively comprise a first shaft section, a second shaft section and a third shaft section; the first shaft section of the first eccentric shaft is movably arranged in the first through hole, and the first shaft section of the second eccentric shaft is movably arranged in the second through hole; the first sliding structure and the second sliding structure respectively comprise a sliding block and a sliding block bracket matched with the sliding block, the sliding block is provided with a third through hole, and the sliding block bracket is provided with a fourth through hole; the third through hole and the fourth through hole of the first sliding structure are movably mounted with one of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft; the third through hole and the fourth through hole of the second sliding structure are movably mounted with the other of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft; wherein when a torque is applied to the first eccentric shaft such that the first eccentric shaft rotates in a first direction, the first eccentric shaft drives the sliding blocks of the first and second sliding structures to slide relative to the sliding block supports, thereby driving the second eccentric shaft to rotate in a second direction opposite to the first direction.
Optionally, a third through hole of the first sliding structure is movably mounted with a third shaft segment of the second eccentric shaft, and a fourth through hole is movably mounted with a third shaft segment of the first eccentric shaft; the third through hole of the second sliding structure is movably mounted with the second shaft section of the second eccentric shaft, and the fourth through hole is movably mounted with the second shaft section of the first eccentric shaft.
Optionally, the first through holes are uniformly arranged along the radial direction of the first end plate, the second through holes are uniformly arranged along the radial direction of the second end plate, and the arrangement direction of the second through holes is perpendicular to the arrangement direction of the first through holes.
Optionally, the number of the first through holes and the number of the second through holes are 3 respectively.
Optionally, the third through holes on the sliders of the first sliding structure and the second sliding structure are perpendicular to the arrangement direction of the fourth through holes on the slider bracket.
Optionally, the number of the third through holes on each slider and the number of the fourth through holes on each slider bracket are respectively 3.
Optionally, the length of the second shaft section of the first eccentric shaft is the same as the thickness of the slide block bracket of the second sliding structure, and the length of the third shaft section is the same as the thickness of the slide block bracket of the first sliding structure; the length of the second shaft section of the second eccentric shaft is the same as the thickness of the sliding block of the second sliding structure, and the length of the third shaft section is the same as the thickness of the sliding block of the first sliding structure.
Optionally, the diameters of the shaft sections of the first eccentric shaft and the second eccentric shaft are equal.
Optionally, the number of the first eccentric shaft and the second eccentric shaft is 3 respectively.
Optionally, a third through hole of the first sliding structure is movably mounted with the second shaft section of the first eccentric shaft, and a fourth through hole is movably mounted with the third shaft section of the second eccentric shaft; the third through hole of the second sliding structure is movably mounted with the second shaft section of the second eccentric shaft, and the fourth through hole is movably mounted with the third shaft section of the first eccentric shaft.
Optionally, the second shaft segments of the first and second eccentric shafts comprise a first, second and third sub-shaft segments, respectively, and the third shaft segments comprise a fourth, fifth and sixth sub-shaft segment, respectively; the first sliding structure comprises a first sub-sliding structure, a second sub-sliding structure and a third sub-sliding structure, the second sliding structure comprises a fourth sub-sliding structure, a fifth sub-sliding structure and a sixth sub-sliding structure, each sub-sliding structure comprises a sliding block and a sliding block support matched with the sliding block, the sliding block is provided with a third through hole, and the sliding block support is provided with a fourth through hole; the first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the first eccentric shaft are movably mounted with third through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure respectively, and the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section are movably mounted with fourth through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure respectively; the first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the second eccentric shaft are movably mounted with the third through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure respectively, and the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section are movably mounted with the fourth through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure respectively.
Optionally, the reverse drive further comprises a first output eccentric shaft and a second output eccentric shaft comprising a first shaft section and a second shaft section, respectively; the first shaft section of the first output eccentric shaft is movably arranged in the first through hole of the first end plate, and the second shaft section is movably arranged in the third through hole of the first sliding structure; the first shaft section of the second output eccentric shaft is movably arranged in the second through hole of the second end plate, and the second shaft section is arranged in the third through hole of the second sliding structure.
Optionally, the third through holes on the sliders on the first sliding structure and the second sliding structure are perpendicular to the arrangement direction of the fourth through holes on the slider bracket, the number of the third through holes on each slider is 3, and the number of the fourth through holes on each slider bracket is 2.
Optionally, the first eccentric shaft and the second eccentric shaft further comprise a fourth shaft section, respectively, the fourth shaft section of the first eccentric shaft is mounted in the second through hole of the second end plate, and the fourth shaft section of the second eccentric shaft is mounted in the first through hole of the first end plate.
Optionally, the diameters of the shaft sections of the first eccentric shaft or the second eccentric shaft are equal, and the number of the first eccentric shaft and the second eccentric shaft is 2 respectively.
Optionally, the first eccentric shaft and the second eccentric shaft are movably connected with the through holes of the first end plate, the second end plate, the first sliding structure and the second sliding structure through bearings.
Optionally, the reverse drive is sprayed with lubricant during operation.
Optionally, the reverse drive device further comprises a pressurizing device adapted to apply opposite pressures to the first end plate and the second end plate to increase the friction force between the contact surfaces of the first end plate, the second end plate, the first sliding structure and the second sliding structure.
The embodiment of the invention also provides a differential mechanism corresponding to the reverse transmission device. The differential includes: the reverse drive described above; the connecting cylindrical surface is fixedly connected with a first end plate and a second end plate of the reverse transmission device to form a differential shell; wherein the differential is adapted to distribute torque to the first and second eccentric shafts when the torque is applied to the differential case.
Optionally, the differential further comprises a gear structure disposed on the differential case, and torque applied to the differential case is input through the gear structure.
Optionally, the differential further comprises a first sleeve and a second sleeve arranged on the first end plate and the second end plate and connected with the reverse transmission device, and the first sleeve and the second sleeve are suitable for being connected with a driving shaft of an automobile.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the reverse transmission device comprises a first eccentric shaft, a second eccentric shaft, a first sliding structure and a second sliding structure, wherein a sliding block and a sliding block bracket of the first sliding structure and the second sliding structure are respectively connected with the first eccentric shaft and the second eccentric shaft. When torque is applied to the first eccentric shaft to enable the first eccentric shaft to rotate along the first direction, the sliding blocks of the first sliding structure and the second sliding structure can be driven to slide relative to the sliding block support, and the rotation of the first eccentric shaft is decomposed into orthogonal linear motion of the sliding blocks and the sliding block support. Since the first sliding structure and the second sliding structure are also connected with the second eccentric shaft, the second eccentric shaft can combine the orthogonal linear motion of the sliding block and the sliding block bracket again to form a torque for driving the second eccentric shaft to rotate in a second direction opposite to the first direction, so that the reverse transmission effect from the first eccentric shaft to the second eccentric shaft is realized. The reverse driving device does not comprise a bevel gear, and the sliding structure and the eccentric shaft are simple in structure and easy to manufacture, so that the manufacturing cost of the reverse driving device can be greatly reduced.
Correspondingly, the differential mechanism of the embodiment of the invention also has the advantages.
Drawings
FIG. 1 is a schematic representation of a prior art differential;
FIG. 2 is a schematic view of the mounting structure of the first end plate and the first eccentric shaft in the reverse transmission device according to an embodiment of the present invention;
FIG. 3 is a schematic view of the mounting structure of the first sliding structure and the first eccentric shaft in the reverse driving device according to an embodiment of the present invention;
FIG. 4 is a schematic view of the mounting structure of the second sliding structure and the first eccentric shaft in the reverse driving device according to an embodiment of the present invention;
FIG. 5 is a schematic view of the mounting structure of the second eccentric shaft and the first and second sliding structures in the reverse driving apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic view of the mounting structure of the second end plate and the second eccentric shaft in the reverse driving device according to an embodiment of the present invention;
FIG. 7 is a schematic representation of a differential incorporating the reverse drive of FIG. 6 in accordance with an embodiment of the present invention;
FIG. 8 is a schematic structural view of a reverse drive assembly in accordance with another embodiment of the present invention;
fig. 9 is an assembled schematic view of the reverse drive assembly shown in fig. 8.
Detailed Description
As can be seen from the background art, the differential of the prior art is complicated in structure and expensive to manufacture.
An embodiment of the present invention provides a reverse transmission device, including: the first end plate is provided with a first through hole, and the second end plate is opposite to the first end plate and is provided with a second through hole; the first eccentric shaft and the second eccentric shaft respectively comprise a first shaft section, a second shaft section and a third shaft section, the first shaft section of the first eccentric shaft is movably arranged in the first through hole, and the first shaft section of the second eccentric shaft is movably arranged in the second through hole; the first sliding structure and the second sliding structure respectively comprise a sliding block and a sliding block bracket matched with the sliding block, the sliding block is provided with a third through hole, and the sliding block bracket is provided with a fourth through hole; the third through hole and the fourth through hole of the first sliding structure are movably mounted with one of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft; the third through hole and the fourth through hole of the second sliding structure are movably mounted with the other of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft.
The reverse transmission device is connected with the first eccentric shaft and the second eccentric shaft through the first sliding structure and the second sliding structure, when torque is applied to the first eccentric shaft to enable the first eccentric shaft to rotate along the first direction, the eccentric shaft can not only transmit rotation, but also transmit revolution, the sliding blocks of the first sliding structure and the second sliding structure can be driven to slide relative to the sliding block support, the rotation of the first eccentric shaft is decomposed into orthogonal linear motion of the sliding blocks and the sliding block support, and the first sliding structure and the second sliding structure are also connected with the second eccentric shaft, so that the orthogonal linear motion of the sliding blocks and the sliding block support can be combined at the second eccentric shaft again to form torque for driving the second eccentric shaft to rotate along the second direction opposite to the first direction.
The reverse driving device does not comprise a bevel gear, and the end plate, the sliding structure and the eccentric shaft are simple in structure and easy to manufacture, and can be manufactured by processes such as blanking, sintering, casting and the like, so that the manufacturing cost of the reverse driving device is greatly reduced.
The embodiment of the invention also provides a differential mechanism which adopts the reverse transmission device and also has the advantage of low manufacturing cost.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that these drawings are provided to facilitate understanding of the embodiments of the present invention and should not be construed as unduly limiting the invention. For greater clarity, the dimensions shown in the figures are not to scale and may be exaggerated, reduced or otherwise altered.
Fig. 2 to 6 show a schematic structural view of a reverse driving apparatus according to an embodiment of the present invention, which includes a first end plate 210, a second end plate 220, a first eccentric shaft 230, a second eccentric shaft 240, a first sliding structure 250, and a second sliding structure 260. The reverse drive device according to the embodiment of the present invention will be described in detail with reference to fig. 2 to 6.
First, referring to fig. 2, fig. 2 shows a schematic view of an installation structure of the first end plate 210 and the first eccentric shaft 230 of the reverse driving apparatus of the present embodiment.
In this embodiment, the first end plate 210 is a circular disc, the first end plate 210 has first through holes 211, and the first through holes 211 are uniformly arranged along the radial direction of the first end plate 210. Specifically, as shown in fig. 2, the number of the first through holes 211 on the first end plate 210 is 3, and the first through holes 211 are distributed along the vertical direction, wherein one first through hole 211 is located at the center of the first end plate 210. In this embodiment, the first through hole 211 penetrates through the first end plate 210; in other embodiments, only the first through hole 211 located at the center of the first end plate 210 may penetrate through the first end plate 210, and the two first through holes 211 located at the two sides do not penetrate through the first end plate.
In other embodiments, the number of the first through holes 211 can be selected according to the specific application, and more or less than 3 in combination with the number of the first eccentric shafts 230.
Referring to fig. 2, the first eccentric shaft 230 includes a first shaft segment 231, a second shaft segment 232, and a third shaft segment 233. The axes of the shaft segments are parallel and do not coincide, so that the first eccentric shaft 230 can transmit not only rotation but also revolution. In this embodiment, the diameters of the shaft sections of the first eccentric shaft 230 are the same, and the lengths of the second shaft section 232 and the third shaft section 233 are the same.
As shown in fig. 2, in this embodiment, the number of the first eccentric shafts 230 is also 3, which is the same as the number of the first through holes 211 on the first end plate 210, and the first shaft segments 231 of the 3 first eccentric shafts 230 are respectively movably mounted in the 3 first through holes 211 of the first end plate 210. For example, the first shaft segment 221 of the first eccentric shaft 230 may rotate within the first through hole 211 of the first end plate 210. In this embodiment, the length of the first shaft segment 231 is greater than the thickness of the first end plate 210, so that the first shaft segment 231 can pass through the first end plate 210 and be exposed out of the first end plate 210 for connection with an external transmission device.
Specifically, the diameter of each shaft segment of the first eccentric shaft 230 needs to be determined according to the bearing torque and the part assembling and positioning requirements; the length of each shaft segment also needs to be determined by the size of the part that mates with the shaft segment and the necessary clearance between adjacent parts, which is not a limitation of the present invention.
Next, referring to fig. 3, fig. 3 is a schematic view showing an installation structure of the first sliding structure 250 and the first eccentric shaft 230 of the reverse driving apparatus of the present embodiment.
In this embodiment, the first sliding structure 250 includes a sliding block 251 and a sliding block bracket 252 cooperating with the sliding block 251, the sliding block 251 has a third through hole 253, and the sliding block bracket 252 has a fourth through hole 254.
Referring to fig. 3, in the present embodiment, the number of the third through holes 253 on the slider 251 and the number of the fourth through holes 254 on the slider bracket 252 correspond to the number of the first eccentric shafts 230, and is 3. In this embodiment, the slider 251 and the slider bracket 252 of the first sliding structure 250 form a cross shape, and the slider 251 can slide in a direction perpendicular to the slider bracket 252. In this embodiment, the fourth through hole 254 of the slider bracket 252 of the first sliding structure 250 and the third through hole 253 of the slider 251 are located on different planes so as to be connected to the first eccentric shaft 230 and the second eccentric shaft 240, respectively.
The third and fourth through holes 253 and 254 of the first sliding structure 250 may be movably installed with one of the second and third shaft sections of the first and second eccentric shafts 230 and 240. In this embodiment, the fourth through hole 254 of the slider bracket 252 of the first sliding structure 250 is movably attached to the third shaft segment 233 of the first eccentric shaft 230, and the third shaft segment 233 of the first eccentric shaft 230 is rotatable in the fourth through hole 254 of the slider bracket 252. Subsequently, the third shaft segment of the second eccentric shaft 240 is movably installed with the third through hole 253 on the sliding block 251 of the first sliding structure 250. Since the slider 251 and the slider bracket 252 of the first sliding structure 250 form a cross shape, so that the arrangement direction of the third through holes 253 on the slider 251 is also perpendicular to the arrangement direction of the fourth through holes 254 on the slider bracket 252, when the slider 251 slides relative to the slider bracket 252, the third shaft segment of the second eccentric shaft 240 can be driven to move vertically relative to the third shaft segment 233 of the first eccentric shaft 230.
Next, referring to fig. 4, fig. 4 shows a schematic view of an installation structure of the second sliding structure 260 and the first eccentric shaft 230 of the present embodiment.
Similarly, in this embodiment, the second sliding structure 260 also includes a sliding block 261 and a sliding block bracket 262 cooperating with the sliding block 261, the sliding block 261 has a third through hole 263, and the sliding block bracket 262 has a fourth through hole 264. The number of the third through holes 263 on the slider 261 of the second sliding structure 260 and the number of the fourth through holes on the slider bracket 262 are 3 respectively. The third through holes 263 on the sliding block 261 of the second sliding structure 260 are perpendicular to the arrangement direction of the fourth through holes 264 on the sliding block bracket 262. In this embodiment, the fourth through hole 264 of the slider bracket 262 of the first sliding structure 260 and the third through hole 263 of the slider 261 are also located on different planes so as to be connected to the first eccentric shaft 230 and the second eccentric shaft 240, respectively, and the first sliding structure 250 is located in a frame surrounded by the slider 261 and the slider bracket 262 of the second sliding structure 260.
The third and fourth through holes 263 and 264 of the second sliding structure 260 may be movably installed with the other of the second and third shaft sections of the first and second eccentric shafts 230 and 240, to which the first sliding structure 250 is not connected. In this embodiment, the fourth through hole 264 of the slider bracket 262 of the second sliding structure 260 is movably mounted to the second shaft segment 232 of the first eccentric shaft 230, and the second shaft segment 232 of the first eccentric shaft 230 is rotatable in the fourth through hole 264 of the slider bracket 262. Subsequently, the second shaft section of the second eccentric shaft 240 is movably installed with the third through hole 263 on the sliding block 261 of the second sliding structure 260. Since the third through holes 263 of the sliding block 261 of the second sliding structure 260 are perpendicular to the arrangement direction of the fourth through holes 264 of the sliding block bracket 262, when the sliding block 261 of the second sliding structure 260 slides relative to the sliding block bracket 262, the second shaft segment of the second eccentric shaft 240 can be driven to move vertically relative to the second shaft segment 232 of the first eccentric shaft 230.
Next, referring to fig. 5, fig. 5 shows a schematic view of an installation structure of the second eccentric shaft 240 and the first and second sliding structures 250 and 260 according to the present embodiment.
In this embodiment, the second eccentric shaft 240 includes a first shaft section, a second shaft section and a third shaft section (not shown), and the diameters of the shaft sections are the same, and the lengths of the second shaft section and the third shaft section are the same. In this embodiment, the number of the second eccentric shafts 240 is also 4, and is the same as the number of the first shaft segments 230, the number of the third through holes 253 on the first sliding structure 250, and the number of the third through holes 263 on the second sliding structure 260.
The second shaft section of the second eccentric shaft 240 is movably mounted with the third through hole on the second sliding structure 260 slide block, and the third shaft section is movably mounted with the third through hole on the first sliding structure 250 slide block. Since the sliding brackets of the first sliding structure 250 and the second sliding structure 260 are connected to the third shaft segment and the second shaft segment of the first eccentric shaft 230, respectively, the movable connection between the first eccentric shaft 230 and the second eccentric shaft 240 is realized through the first sliding structure 250 and the second sliding structure 260.
In this embodiment, the length of the second shaft section of the first eccentric shaft 230 is the same as the thickness of the slide bracket of the second sliding structure 260, the length of the third shaft section is the same as the thickness of the slide of the first sliding structure 250, and the thickness of the slide bracket of the first and second sliding structures refers to the thickness of the portion of the slide bracket having the fourth through hole; the length of the second shaft segment of the second eccentric shaft 240 is the same as the thickness of the slide block of the second sliding structure 260, the length of the third shaft segment is the same as the thickness of the slide block of the first sliding structure 250, and the thickness of the slide block refers to the thickness of the portion of the slide block having the third through hole. In other embodiments, the length of each shaft segment of the first eccentric shaft 230 and the second eccentric shaft 240 may also be slightly greater than the thickness of the corresponding slider bracket or slider, so that there is a certain gap between the parts assembled on the first eccentric shaft 230 and the second eccentric shaft 240.
Next, referring to fig. 6, fig. 6 shows a schematic view of an installation structure of the second end plate 220 and the second eccentric shaft 240 of the present embodiment.
In this embodiment, the second end plate 220 is opposite to the first end plate 210, has a similar shape to the first end plate 210, and is also a circular disk. The second end plate 220 has second through holes 221 (in fig. 6, the second through holes 221 are filled with the first shaft segment of the second eccentric shaft 240), the second through holes 221 are uniformly arranged along the radial direction of the second end plate, and the arrangement direction of the second through holes 221 is perpendicular to the arrangement direction of the first through holes on the first end plate 210. Specifically, as shown in fig. 6, the number of the second through holes 221 on the second end plate 220 is 3, and the second through holes 221 are distributed along the horizontal direction, wherein one second through hole 221 is located at the center of the second end plate 220.
In this embodiment, the second through hole 221 penetrates through the second end plate 220, and the first shaft segment (not labeled) of the second eccentric shaft 240 is movably installed in the second through hole 221. The first shaft section of the second eccentric shaft 240 can rotate within the first through hole 221 of the second end plate 220. In this embodiment, the length of the first shaft segment of the second eccentric shaft 240 is greater than the thickness of the second end plate 220, so that the first shaft segment can pass through the second end plate 220, be exposed out of the second end plate 220, and be used for connecting with an external transmission device. In other embodiments, only the second eccentric shaft 211 located at the center of the circle may expose the second end plate 220 for external transmission connection.
In the above reverse driving device, the first eccentric shaft 230 and the second eccentric shaft 240 are connected by the slider and the slider bracket of the first sliding structure 250 and the second sliding structure 260, when a torque is input to the first eccentric shaft 230 to rotate the first eccentric shaft 230 in a first direction, the first eccentric shaft 230 can drive the slider of the first sliding structure 250 and the second sliding structure 260 to slide relative to the slider bracket, so as to drive the second eccentric shaft 240 to rotate in a second direction opposite to the first direction, thereby realizing the reverse driving from the first eccentric shaft 230 to the second eccentric shaft 240. It will be appreciated by those skilled in the art that the above described gearing arrangement may similarly effect a reverse gearing from the second eccentric shaft 240 to the first eccentric shaft 230.
Correspondingly, the embodiment of the invention also provides a differential mechanism, which comprises the reverse transmission device and the connecting cylindrical surface.
Referring to fig. 7, fig. 7 shows a differential according to an embodiment of the present invention, which includes a counter drive device as shown in fig. 2-6 and a connecting cylindrical surface 270, wherein the connecting cylindrical surface 270 is fixedly connected to a first end plate (not shown) and a second end plate 220 of the counter drive device to form a differential case. When a torque is applied to the differential case, the differential is adapted to distribute the torque to the first and second eccentric shafts (not shown).
In this embodiment, the differential further includes a gear structure 280, the gear structure 280 is disposed on the differential case, and when a torque is applied to the differential case, the torque is input through the gear structure 280. The differential also includes first and second collars (not shown) 290 disposed on the first and second end plates 290 for connection to the reverse drive. For example, the first socket is coupled to a first eccentric shaft of the reverse drive, and the second socket 290 is adapted to be coupled to a second eccentric shaft of the reverse drive. The first and second sockets 290 are shown connected to the vehicle drive shafts (axle shafts) during use of the differential. In other embodiments, the first and second sleeves may be omitted, and the first and second eccentric shafts of the reversing gear may be directly connected to the vehicle drive shaft.
In a specific use process, the driving gear of the transmission shaft of the automobile is engaged with the gear structure 280 on the differential housing, and the number of teeth of the gear structure 280 is usually greater than that of the driving gear on the transmission shaft, so that the speed reduction and distance increase of the automobile power from the driving gear of the transmission shaft to the gear structure 280 on the differential housing are realized. The first and second sockets 290 of the differential are connected to a drive shaft and can drive the rotation of the vehicle drive wheels. In the process of straight-line driving of the automobile, resistance on driving wheels on two sides of the automobile is the same, torque transmitted to a first eccentric shaft and a second eccentric shaft of the differential is the same, sliding blocks and sliding block supports of a first sliding structure and a second sliding structure in the differential are relatively static, and the rotating speeds of the first eccentric shaft and the second eccentric shaft are the same. When the automobile turns, the resistance received by the wheel at the inner side of the automobile is larger than that received by the wheel at the outer side, and the inner side wheel is connected with the first eccentric shaft through the driving shaft and the first pipe sleeve, and the outer side wheel is connected with the second eccentric shaft through the driving shaft and the second pipe sleeve, so that the resistance torque received by the first eccentric shaft is larger than that received by the second eccentric shaft, the sliding blocks and the sliding block supports of the first sliding structure and the second sliding structure in the speed changer slide relatively, the second eccentric shaft rotates in the opposite direction relative to the first eccentric shaft, the speed reduction is realized at the first eccentric shaft, the speed increase is realized at the second eccentric shaft, the rotating speed of the second eccentric shaft is larger than that of the first eccentric shaft, namely, the rotating speed of the wheel at the outer side is larger than that of the wheel at the inner side, and the smooth turning of the automobile.
Since the above-described reverse transmission device and differential include only simple-structured components such as end plates, sliding structures, and eccentric shafts, the structural complexity and manufacturing cost of the reverse transmission device and differential are greatly reduced as compared with the prior art that includes bevel gears.
Further, fig. 8 and 9 show a schematic structural view of a reverse drive device according to another embodiment of the present invention, wherein fig. 9 is an assembly view of fig. 8.
Similar to the previous embodiment, in this embodiment, the first eccentric shaft and the second eccentric shaft are connected by a sliding structure, and the torque is reversely transmitted from one eccentric shaft to the other eccentric shaft by using the relative sliding between the sliding block and the sliding block bracket in the sliding structure.
Referring to fig. 8 and 9 together, the reverse gear of the present embodiment includes: a first end plate 310 and a second end plate 320, the first end plate 310 having a first through hole (not shown) therein, the second end plate 320 having a second through hole 321 therein; a first eccentric shaft 330 and a second eccentric shaft 340, which respectively comprise a first shaft section, a second shaft section and a third shaft section (not labeled), wherein the first shaft section of the first eccentric shaft 330 is movably installed in the first through hole of the first end plate 310, and the first shaft section of the second eccentric shaft 340 is installed in the second through hole of the second end plate 320; a first slider structure 350 and a second slider structure 360, each of which comprises a slider and a slider bracket (not labeled) engaged with the slider, wherein the slider has a third through hole, the slider bracket has a fourth through hole (not labeled), the third through hole of the first slider structure 350 is movably mounted with the second shaft section of the first eccentric shaft 330, and the fourth through hole is movably mounted with the third shaft section of the second eccentric shaft 340; the third through hole of the second sliding structure 360 is movably mounted with the second shaft section of the second eccentric shaft 340, and the fourth through hole is movably mounted with the third shaft section of the first eccentric shaft 330. When a torque is applied to the first eccentric shaft 330 such that the first eccentric shaft 330 rotates in a first direction, the first eccentric shaft 330 drives the sliders of the first and second sliding structures 350 and 360 to slide along the slider brackets, thereby driving the second eccentric shaft 340 to rotate in a second direction opposite to the first direction.
In particular, with continued reference to fig. 8 and 9, in the present embodiment, the second shaft segments of the first eccentric shaft 330 and the second eccentric shaft 340 respectively comprise a first sub-shaft segment, a second sub-shaft segment and a third sub-shaft segment, and the third shaft segments respectively comprise a fourth sub-shaft segment, a fifth sub-shaft segment and a sixth sub-shaft segment (not labeled); the first sliding structure 350 includes a first sub-sliding structure, a second sub-sliding structure and a third sub-sliding structure, and the second sliding structure 360 includes a fourth sub-sliding structure, a fifth sub-sliding structure and a sixth sub-sliding structure. Each sub-sliding structure includes a slider and a slider holder cooperating with the slider, and, for example, as shown in fig. 9, the second sliding structure 360 includes a slider 361 and a slider holder 362. In this embodiment, the slider bracket 362 is divided into two parts, and the slider 361 is located between the two parts of the slider bracket 362, and the two parts can be connected by a guide rail or other structures. Compared with the previous embodiment, the sliding blocks and the sliding block brackets of the sliding structures in the previous embodiment are located on different planes, while in the present embodiment, the sliding blocks and the sliding block brackets of the first sliding structure 350 and the second sliding structure 360 are located on the same plane, which further reduces the structural complexity and the manufacturing cost of the sliding structures.
In this embodiment, the diameters of the shaft sections of the first eccentric shaft 330 or the second eccentric shaft 340 are equal, and the number of the first eccentric shaft 330 and the second eccentric shaft 340 is two. The two first eccentric shafts 330 are movably installed in two first through holes at two ends in the diameter direction of the first end plate 320, the two second eccentric shafts 340 are movably installed in two second through holes at two ends in the diameter direction of the second end plate 340, and the arrangement direction of the two first eccentric shafts 330 is perpendicular to the arrangement direction of the two second eccentric shafts 340.
Continuing with the example of the second sliding structure 360 in fig. 9, the slider 361 has a third through hole 363, and the slider bracket 362 has a fourth through hole 364. Similarly, the slider of the first sliding structure 350 is also provided with a third through hole, and the slider bracket is provided with a fourth through hole. The arrangement direction of the third through holes is vertical to the arrangement direction of the fourth through holes.
In this embodiment, the first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the first eccentric shaft 330 are respectively movably mounted with the third through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure of the first sliding structure 350, the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section are respectively movably mounted with the fourth through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure of the second sliding structure 360, the third through holes are located on the sliding block, and the fourth through holes are located on the sliding block bracket. The first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the second eccentric shaft 340 are movably mounted with the fourth sub-sliding structure, the fifth sub-sliding structure and the third through hole of the sixth sub-sliding structure of the second sliding structure 360 respectively, and the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section are movably mounted with the first sub-sliding structure, the second sub-sliding structure and the fourth through hole of the third sub-sliding structure of the first sliding structure 350 respectively. In this embodiment, the first sub-sliding structure, the second sub-sliding structure, the third sub-sliding structure, the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure are sequentially arranged along a direction from the first end plate 310 to the second end plate 320, the connection between the first eccentric shaft 330 and the second eccentric shaft 340 is realized through the slider and the slider bracket of each sub-sliding structure, and when the slider of each sub-sliding structure slides relative to the slider bracket, the relative movement between the first eccentric shaft 330 and the second eccentric shaft 340 can be driven.
In this embodiment, the reverse drive further comprises a first output eccentric shaft 391 and a second output eccentric shaft 392 comprising a first shaft section and a second shaft section, respectively. The first shaft segment of the first output eccentric shaft 391 is movably installed in the first through hole of the first end plate 310, and the second shaft segment is movably installed in the third through hole of the first sliding structure 350. Since the first sliding structure 350 in this embodiment includes the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure, which are three sub-sliding structures, correspondingly, the second shaft section of the first output eccentric shaft 391 also includes three sub-shaft sections, which are respectively and correspondingly installed in the third through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure included in the first sliding structure 350. Similarly to the first output eccentric shaft 391, the first shaft segment of the second output eccentric shaft 392 is movably installed in the second through hole of the second end plate 320, and the second shaft segment includes three sub-shaft segments, which are respectively installed in the third through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure of the second sliding structure 360.
In this embodiment, the first and second end plates 310 and 320 have a circular configuration. The first and second through holes for installing the first shaft segment of the first output eccentric shaft 391 and the first shaft segment of the second output eccentric shaft 392 are located at the center of the first end plate 310 and the second end plate 320, respectively. The first 391 and second 392 output eccentric shafts may subsequently be used for connection to the drive shafts of the motor vehicle.
In this embodiment, since the third through holes of the first and second sliding structures 350 and 360 are connected to the first and second eccentric shafts 330 and 340, and the first and second output eccentric shafts 391 and 392 are further included, the number of the third through holes of the sliders on the first and second sliding structures 350 and 360 is greater than the number of the fourth through holes on the slider bracket. For example, when the number of the first and second eccentric shafts 330 and 340 is 2 and the number of the first and second output eccentric shafts 391 and 392 is 1, respectively, the number of the third through holes of each of the sliders on the first and second sliding structures 350 and 360 is 3, the number of the fourth through holes of each of the slider supports is 2, and the third through holes of the sliders are perpendicular to the arrangement direction of the fourth through holes of the slider supports.
In this embodiment, the first eccentric shaft 330 and the second eccentric shaft 340 further include a fourth shaft section, respectively, the fourth shaft section of the first eccentric shaft 330 is mounted in the second through hole of the second end plate 320, and the fourth shaft section of the second eccentric shaft 340 is mounted in the first through hole of the first end plate 310. That is, in this embodiment, the first eccentric shaft 330 and the second eccentric shaft 340 penetrate both the first end plate 310 and the second end plate 320, so that the strength of the reverse driving apparatus structure can be enhanced.
Corresponding to the reverse drive arrangement shown in fig. 8 and 9, embodiments of the present invention also provide a differential including the reverse drive arrangement described above. The differential includes a cylindrical connecting surface connecting the first end plate 310 and the second end plate 320 to form a differential case. In some embodiments, the differential may also include a gear structure disposed on the differential housing, and first and second shrouds disposed on the first and second end plates 310, 320 for connection with the vehicle drive shaft. Specifically, reference may be made to the description of the differential of the previous embodiment, which is not repeated here. It should be noted that the differential of the present embodiment may also be connected to the driving shaft of the vehicle through the first output eccentric shaft 391 and the second output eccentric shaft 392.
It should be noted that although the present invention is disclosed above in terms of preferred embodiments, the reverse drive and differential embodiments of the present invention are not limited to the above embodiments. The invention has the idea that a slide block and a slide block bracket of a sliding device are respectively connected with a first eccentric shaft and a second eccentric shaft, and the rotation torque of one eccentric shaft is reversely transmitted to the other eccentric shaft through the relative sliding of the slide block and the slide block bracket in the sliding device, thereby realizing the purpose of reverse transmission; in a specific application, the sliding device can be provided with various connecting modes of the eccentric shaft.
In some embodiments, the reverse drive device and the differential further comprise a bearing structure, for example, the first eccentric shaft and the second eccentric shaft are movably connected with the through holes of the first end plate, the second end plate, the first sliding structure and the second sliding structure through bearings, which is beneficial to reducing friction force during rotation of the eccentric shafts relative to the through holes, and reducing energy loss and component wear.
In some embodiments, the reverse drive and differential may also be sprayed with a lubricant during operation to further reduce friction.
In some embodiments, the reverse drive device and the differential may further include a pressure device, and the pressure device may apply opposite pressure to the first end plate and the second end plate, and increase friction between contact surfaces of the first end plate, the second end plate, the first sliding structure and the second sliding structure along an axial direction of the first eccentric shaft and the second eccentric shaft, so as to limit an excessive speed difference between rotation of the first eccentric shaft and the second eccentric shaft, and achieve a function of a Limited Slip Differential (LSD).
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (21)
1. A reverse drive device, comprising:
the first end plate is provided with a first through hole, and the second end plate is opposite to the first end plate and is provided with a second through hole;
the first eccentric shaft and the second eccentric shaft respectively comprise a first shaft section, a second shaft section and a third shaft section; the first shaft section of the first eccentric shaft is movably arranged in the first through hole, and the first shaft section of the second eccentric shaft is movably arranged in the second through hole; and
the first sliding structure and the second sliding structure respectively comprise a sliding block and a sliding block bracket matched with the sliding block, the sliding block is provided with a third through hole, and the sliding block bracket is provided with a fourth through hole; the third through hole and the fourth through hole of the first sliding structure are movably mounted with one of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft; the third through hole and the fourth through hole of the second sliding structure are movably mounted with the other of the second shaft section and the third shaft section of the first eccentric shaft and the second eccentric shaft;
wherein when a torque is applied to the first eccentric shaft such that the first eccentric shaft rotates in a first direction, the first eccentric shaft drives the sliding blocks of the first and second sliding structures to slide relative to the sliding block supports, thereby driving the second eccentric shaft to rotate in a second direction opposite to the first direction.
2. The reverse drive of claim 1, wherein the third through-hole of the first slide construction is movably mounted with the third shaft segment of the second eccentric shaft and the fourth through-hole of the first slide construction is movably mounted with the third shaft segment of the first eccentric shaft; the third through hole of the second sliding structure is movably mounted with the second shaft section of the second eccentric shaft, and the fourth through hole of the second sliding structure is movably mounted with the second shaft section of the first eccentric shaft.
3. The reverse drive apparatus according to claim 2, wherein the first through holes are uniformly arranged in a radial direction of the first end plate, the second through holes are uniformly arranged in a radial direction of the second end plate, and an arrangement direction of the second through holes is perpendicular to an arrangement direction of the first through holes.
4. A reverse drive arrangement as claimed in claim 3, in which the number of said first through-holes and the number of said second through-holes are each 3.
5. The reverse drive of claim 2, wherein the third through holes of the sliders of the first and second slide structures are perpendicular to the arrangement direction of the fourth through holes of the slider holder.
6. The reverse drive of claim 5, wherein the number of the third through holes in each slider and the number of the fourth through holes in each slider bracket are 3, respectively.
7. The reverse drive of claim 2, wherein the second shaft section of the first eccentric shaft has the same length as the thickness of the shoe support of the second sliding mechanism, and the third shaft section of the first eccentric shaft has the same length as the thickness of the shoe support of the first sliding mechanism; the length of the second shaft section of the second eccentric shaft is the same as the thickness of the sliding block of the second sliding structure, and the length of the third shaft section of the second eccentric shaft is the same as the thickness of the sliding block of the first sliding structure.
8. The reverse drive of claim 7, wherein the shaft segments of said first eccentric shaft and said second eccentric shaft are of equal diameter.
9. The reverse drive of claim 7, wherein the first and second eccentric shafts are each 3 in number.
10. The reverse drive of claim 1, wherein the third through-hole of the first slide structure is movably mounted with the second shaft section of the first eccentric shaft and the fourth through-hole of the first slide structure is movably mounted with the third shaft section of the second eccentric shaft; the third through hole of the second sliding structure is movably mounted with the second shaft section of the second eccentric shaft, and the fourth through hole of the second sliding structure is movably mounted with the third shaft section of the first eccentric shaft.
11. The reverse drive of claim 10, wherein the second shaft segments of the first and second eccentric shafts comprise first, second, and third sub-shaft segments, respectively, and the third shaft segments comprise fourth, fifth, and sixth sub-shaft segments, respectively;
the first sliding structure comprises a first sub-sliding structure, a second sub-sliding structure and a third sub-sliding structure, the second sliding structure comprises a fourth sub-sliding structure, a fifth sub-sliding structure and a sixth sub-sliding structure, each sub-sliding structure comprises a sliding block and a sliding block support matched with the sliding block, the sliding block is provided with a third through hole, and the sliding block support is provided with a fourth through hole;
the first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the first eccentric shaft are movably mounted with the third through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure respectively, and the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section of the first eccentric shaft are movably mounted with the fourth through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure respectively; the first sub-shaft section, the second sub-shaft section and the third sub-shaft section of the second eccentric shaft are movably mounted with the third through holes of the fourth sub-sliding structure, the fifth sub-sliding structure and the sixth sub-sliding structure respectively, and the fourth sub-shaft section, the fifth sub-shaft section and the sixth sub-shaft section of the second eccentric shaft are movably mounted with the fourth through holes of the first sub-sliding structure, the second sub-sliding structure and the third sub-sliding structure respectively.
12. The reverse drive of claim 10, further comprising a first output eccentric shaft and a second output eccentric shaft comprising a first shaft segment and a second shaft segment, respectively; the first shaft section of the first output eccentric shaft is movably arranged in the first through hole of the first end plate, and the second shaft section of the first output eccentric shaft is movably arranged in the third through hole of the first sliding structure; the first shaft section of the second output eccentric shaft is movably arranged in the second through hole of the second end plate, and the second shaft section of the second output eccentric shaft is arranged in the third through hole of the second sliding structure.
13. The reverse drive of claim 12, wherein the third through holes of the sliders on the first and second slide structures are perpendicular to the arrangement direction of the fourth through holes on the slider supports, the number of the third through holes on each slider is 3, and the number of the fourth through holes on each slider support is 2.
14. The reverse drive of claim 10, wherein the first and second eccentric shafts further comprise a fourth shaft segment, respectively, the fourth shaft segment of the first eccentric shaft being mounted in the second through hole of the second end plate and the fourth shaft segment of the second eccentric shaft being mounted in the first through hole of the first end plate.
15. The reverse drive of claim 10, wherein the shaft segments of the first eccentric shaft or the second eccentric shaft are equal in diameter, and the number of the first eccentric shaft and the second eccentric shaft is 2 each.
16. The reverse drive of claim 1, wherein the first eccentric shaft and the second eccentric shaft are movably coupled to the through holes of the first end plate, the second end plate, the first sliding structure and the second sliding structure by bearings.
17. The reverse drive of claim 1, wherein the reverse drive is sprayed with lubricant during operation.
18. The reverse drive of claim 1, further comprising a pressure applying device adapted to apply opposing pressures to said first end plate and said second end plate to increase friction between said first end plate, said second end plate, said first sliding structure and said second sliding structure interface.
19. A differential, comprising:
a reverse drive as claimed in any one of claims 1 to 18;
the connecting cylindrical surface is fixedly connected with a first end plate and a second end plate of the reverse transmission device to form a differential shell;
wherein the differential is adapted to distribute torque to the first and second eccentric shafts when the torque is applied to the differential case.
20. The differential of claim 19, further comprising a gear structure disposed on said differential case, said application of torque to said differential case being input through said gear structure.
21. The differential of claim 19, further comprising first and second bushings disposed on said first and second end plates for connection to said reverse drive means, said first and second bushings adapted for connection to an automotive drive shaft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710064357.XA CN108397535B (en) | 2017-02-04 | 2017-02-04 | Reverse transmission device and differential mechanism |
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| CN201710064357.XA CN108397535B (en) | 2017-02-04 | 2017-02-04 | Reverse transmission device and differential mechanism |
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| CN108397535A CN108397535A (en) | 2018-08-14 |
| CN108397535B true CN108397535B (en) | 2021-03-02 |
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| CN108397535A (en) | 2018-08-14 |
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