CN208951253U - Electric car and its transmission assembly, differential mechanism - Google Patents
Electric car and its transmission assembly, differential mechanism Download PDFInfo
- Publication number
- CN208951253U CN208951253U CN201821589343.6U CN201821589343U CN208951253U CN 208951253 U CN208951253 U CN 208951253U CN 201821589343 U CN201821589343 U CN 201821589343U CN 208951253 U CN208951253 U CN 208951253U
- Authority
- CN
- China
- Prior art keywords
- spherical
- shell
- spherical surface
- planetary gear
- radius
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Retarders (AREA)
Abstract
The utility model relates to a kind of electric car and its transmission assemblies, differential mechanism.The spherical radius of first spherical surface and the spherical radius of the second spherical surface be respectively greater than Internal Spherical Surface spherical radius and spherical outside surface spherical radius when, the big end of the first spherical surface is contacted with shell, and the small end of the second spherical surface is contacted with planetary gear.At this point, the contact area between spherical pad and shell is big, frictional force is bigger, and spherical pad is relative to housing stationary.Conversely, the small end of the first spherical surface is contacted with shell, and the big end of the second spherical surface is contacted with planetary gear.At this point, the contact area between spherical pad and planetary gear is big, frictional force is bigger, and spherical pad is static relative to planetary gear.It is optimized by the radius to spherical surface, can avoid spherical pad and occur with the case where shell, planetary gear opposite sliding simultaneously, and this is exactly the reason of causing differential mechanism abnormal sound.Therefore, the riding experience of above-mentioned electric car is effectively promoted.
Description
Technical field
The utility model relates to technical field of new energy, in particular to a kind of electric car and its transmission assembly,
Differential mechanism.
Background technique
Traditional passenger car power drive system is the power assembly that engine adds speed changer, and electric passenger vehicle dynamical system
It is the power assembly of battery, motor and speed reducer.Traditional passenger car when power transmits, make an uproar by the noise ratio speed changer of engine
Sound is big, and electric passenger vehicle motor noise is smaller than engine.
It is found during electric automobile during traveling, carries out the abnormal sound that can generate " crash crash " when the walking of " 8 " word.Further point
Analysis discovery, which issued by differential mechanism.Motor noise is small when due to electric car work, therefore the noise of " crash crash " is just shown
It obtains especially ear-piercing.Therefore, driver and passenger's perception in electric car is very uncomfortable, and riding experience is poor.
Utility model content
Based on this, it is necessary to for the problem that existing electric car riding experience is poor, provide one kind and can effectively be promoted and be driven
Multiply the electric car and its transmission assembly, differential mechanism of experience.
A kind of differential mechanism, comprising:
Shell has Internal Spherical Surface；
Planetary gear train, including being fixed on the intracorporal gear shaft of the shell and being rotatablely arranged on the gear shaft
Planetary gear, the planetary gear have spherical outside surface towards the side of the Internal Spherical Surface；
Output precision, including axle shaft gear and the output axle shaft being fixedly connected with the axle shaft gear, the axle shaft gear
It is engaged with the planetary gear；And
Spherical pad is sheathed on the planetary gear shaft and is held between the Internal Spherical Surface and the spherical outside surface, described
Spherical pad has the first spherical surface towards the side of the Internal Spherical Surface, has the second spherical surface towards the side of the spherical outside surface；
Wherein, the spherical radius of first spherical surface and the spherical radius of second spherical surface are respectively greater than or are less than and is described
The spherical radius of the spherical radius of Internal Spherical Surface and the spherical outside surface.
Flat pad is provided between the axle shaft gear and the inner wall of the shell in one of the embodiments,.
The planetary gear includes two in one of the embodiments, and two planetary gears are opposite and interval is set
It sets.
The output precision is two in one of the embodiments, and the half axle gear of each output precision
Wheel is engaged with two planetary gears.
A kind of transmission assembly, comprising:
Speed reducer；And
Differential mechanism as described in any one of above preferred embodiment, the output end of the speed reducer and the shell are driven
Connection.
A kind of electric car, including battery, motor and the transmission assembly as described in above preferred embodiment, the electricity
The input terminal of the output shaft of machine and the speed reducer is sequentially connected.
Above-mentioned electric car and its transmission assembly, differential mechanism, the spherical surface of the spherical radius of the first spherical surface and the second spherical surface
Radius be respectively greater than Internal Spherical Surface spherical radius and spherical outside surface spherical radius when, the big end of the first spherical surface is contacted with shell, and
The small end of second spherical surface is contacted with planetary gear.At this point, the contact area between spherical pad and shell is big, frictional force is bigger,
Spherical pad is relative to housing stationary.Conversely, the small end of the first spherical surface is contacted with shell, and the big end of the second spherical surface and planet tooth
Wheel contact.At this point, the contact area between spherical pad and planetary gear is big, frictional force is bigger, and spherical pad is relative to planet
Gear stationary.It is optimized by the radius to spherical surface, can avoid spherical pad and shell, planetary gear simultaneously with respect to sliding
The reason of situation occurs, and this exactly causes differential mechanism abnormal sound.Therefore, the riding experience of above-mentioned electric car is effectively mentioned
It rises.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of differential mechanism in the utility model preferred embodiment.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes to the utility model
The understanding of disclosure is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
The utility model provides a kind of electric car, transmission assembly and differential mechanism.Wherein, which includes
Speed reducer and the differential mechanism.Electric car includes battery, motor and the transmission assembly, the output shaft of motor and speed reducer it is defeated
Enter end transmission connection.
Referring to Fig. 1, differential mechanism 100 in the utility model preferred embodiment include shell 110, planetary gear train 120,
Output precision 130 and spherical pad 140.
Shell 110 has Internal Spherical Surface (figure is not marked).110 one end of shell is by metal forming.In application process, shell 110
It can be rotated.Specifically, the surface of shell 110 is typically provided with gear, speed reducer is connect with the gear drive.Motor output power
Enter retarder through input terminal, shell 110 is transferred to by output end after slowing down, so that shell 110 be driven to rotate.
Planetary gear train 120 includes gear shaft 121 and planetary gear 123.Gear shaft 121 is fixed in shell 110, planet
Gear 123 is rotatablely arranged on gear shaft 121.Specifically, the side wall of shell 110 offers opposite through-hole, (figure is not
Mark), the both ends of gear shaft 121 are fastened in through-hole.Shell 110 rotates, and can rotate with movable gear shaft 121, and then drives planet
Gear 123 rotates.In addition, planetary gear 123 can also be around 121 rotation of gear shaft.Further, planetary gear 123 is towards shell
The side of 110 Internal Spherical Surface has spherical outside surface (figure is not marked).
Specifically in the present embodiment, planetary gear 123 includes two, and two planetary gears 123 are opposite and interval is arranged.It can
Different according to the magnitude of load of differential mechanism 100 to understand, the quantity of planetary gear 123 is not limited to two.
Output precision 130 includes axle shaft gear 131 and the output axle shaft 133 being fixedly connected with axle shaft gear 131.Half axle gear
The generally bevel gear of wheel 131.Wherein, axle shaft gear 131 is engaged with planetary gear 123, therefore planetary gear 123 can drive half axle gear
131 rotation of wheel, and then output axle shaft 133 is driven to rotate.
The power of motor output can drive shell 110 to rotate after retarder；The rotation of shell 110 can be with movable gear shaft
121 rotations, and then planetary gear 123 is driven to rotate；The rotation of planetary gear 123 can drive the axle shaft gear 131 engaged
Rotation, and then output axle shaft 133 is driven to rotate, so that the power of motor output is conducted to output axle shaft 133.Output axle shaft 133
It is connect for the wheel with vehicle, to realize power output.
Specifically in the present embodiment, flat pad 150 is provided between axle shaft gear 131 and the inner wall of shell 110.Plane
Gasket 150 can between axle shaft gear 131 and shell 110 its buffer function, thus avoid axle shaft gear 131 and shell 110 because
It contacts and excessive wear firmly.
In the present embodiment, output precision 130 be two, and the axle shaft gear 131 of each output precision 130 with two
Planetary gear 123 engages.Two output axle shafts 133, which respectively conduct power to two wheels, realizes driving.
Spherical pad 140 is sheathed on 123 axis 121 of planetary gear and is held on the Internal Spherical Surface and planetary gear 123 of shell 110
Spherical outside surface between.For spherical pad 140 generally by rubber-moulding, two sides have spherical surface.Specifically, spherical pad 140 is towards interior
The side of spherical surface has the first spherical surface (figure is not marked), has the second spherical surface towards the side of spherical outside surface (figure is not marked).
When electric car is turned to, the curved walking of " 8 " word when, differential mechanism 100 realizes differential.That is, two output axle shafts 133
There are rotational speed differences.At this point, planetary gear 123 and axle shaft gear 133 have engagement rotation, 123 rotation of planetary gear is driven；Planet tooth
Taking turns 123 stress can move towards 110 direction of shell, to push the Internal Spherical Surface of ball ring 140 abutting shells 110.
Wherein, the spherical radius of 140 first spherical surface of spherical pad and the spherical radius of the second spherical surface are respectively greater than shell 110
The spherical radius of 123 spherical outside surface of spherical radius and planetary gear of Internal Spherical Surface；Alternatively, the spherical surface of 140 first spherical surface of spherical pad
The spherical radius of radius and the second spherical surface is respectively smaller than 123 spherical outside surface of spherical radius and planetary gear of 110 Internal Spherical Surface of shell
Spherical radius.
Greater than when, the big end of the first spherical surface is contacted with shell 110, and the small end of the second spherical surface is contacted with planetary gear 123.
Spherical surface is considered as the face that multiple circles are superimposed as.Wherein, big end refers to the region for the close spherical surface centre of sphere being relatively large in diameter, and
Small end refers to the region of the smaller separate spherical surface centre of sphere of diameter.At this point, the contact area between spherical pad 140 and shell 110
It is larger, therefore frictional force is bigger.Therefore, when 123 rotation of planetary gear, spherical pad 140 is static relative to shell 110 and only opposite
It is rotated in planetary gear 123.
Less than when, the small end of the first spherical surface is contacted with shell 110, and the big end of the second spherical surface is contacted with planetary gear 123.
At this point, the contact area between spherical pad 140 and planetary gear 123 is larger when being less than, frictional force is bigger.Therefore, ball ring
Piece 140 is static relative to planetary gear 123 and rotates only with respect to shell 110.
It is found by NVH analysis, the abnormal sound of differential mechanism 100 " crash crash " is mainly by the discontinuous rotation of spherical pad 140
Caused by.Spherical pad 140 is between shell 110 and planetary gear 123, and pressure is born on two sides.In traditional differential mechanism,
It is influenced by foozle, 140 two sides of spherical pad and the non-fully interior ball with the spherical outside surface of planetary gear 123 and shell 110
Face contact.Therefore, the frictional force on 140 two sides of spherical pad is not of uniform size, leads to spherical pad 140 and shell 110, planet tooth
Opposite sliding off and on is existed simultaneously between wheel 123, to generate abnormal sound.
Differential mechanism 100 in the present embodiment, by the radius to Internal Spherical Surface, spherical outside surface, the first spherical surface and the second spherical surface into
Row optimization can avoid spherical pad 140 and occur with the case where shell 110, planetary gear 123 opposite sliding simultaneously, to avoid
The generation of above-mentioned " crash crash " abnormal sound.
Specifically, Internal Spherical Surface, spherical outside surface, the first spherical surface and the second spherical surface spherical radius following methods can be used set
Meter:
1, nominal size is designed:
The nominal size of 110 inner sphere radius of shell: RA；
The nominal size of 140 first spherical radius of spherical pad: RB；
The nominal size of 140 second spherical radius of spherical pad: RC；
The nominal size of 123 ectosphere radius surface of planetary gear: RD；Wherein, RA=RB；RC=RD.
2, the tolerance of nominal size is designed:
The tolerance of 110 inner sphere radius of shell: ra；
The tolerance of 140 first spherical radius of spherical pad: rb；
The tolerance of 140 second spherical radius of spherical pad: rc；
The tolerance of 123 ectosphere radius surface of planetary gear: rd.
3, the deviation of nominal size is designed:
The first design scheme A:
The deviation of 110 inner sphere radius of shell :-ra；
The deviation of 140 first spherical radius of spherical pad :+rb；
The deviation of 140 second spherical radius of spherical pad :+rc；
The deviation of 123 ectosphere radius surface of planetary gear :-rd；
Second of design scheme B:
The deviation of 110 inner sphere radius of shell :+ra；
The deviation of 140 first spherical radius of spherical pad :-rb；
The deviation of 140 second spherical radius of spherical pad :-rc；
The deviation of 123 ectosphere radius surface of planetary gear :+rd.
4, actual size is determined:
The first option A:
The actual size of 110 inner sphere radius of shell: RA-ra；
The actual size of 140 first spherical radius of spherical pad: RB+rb；
The actual size of 140 second spherical radius of spherical pad: RC+rc；
The actual size of 123 ectosphere radius surface of planetary gear: RD-rd；
Second of design scheme B:
The actual size of 110 inner sphere radius of shell: RA+ra；
The actual size of 140 first spherical radius of spherical pad: RB-rb；
The actual size of 140 second spherical radius of spherical pad: RC-rc；
The actual size of 123 ectosphere radius surface of planetary gear: RD+rd。
The first design scheme A:RA-ra< RB+rb, RC+rc> RD-rd；Second of design scheme B:RA+ra> RB-rb, RC-rc
< RD+rd。
Above-mentioned electric car and its transmission assembly, differential mechanism 100, the ball of the spherical radius of the first spherical surface and the second spherical surface
Radius surface be respectively greater than Internal Spherical Surface spherical radius and spherical outside surface spherical radius when, big end and the shell 110 of the first spherical surface connect
Touching, and the small end of the second spherical surface is contacted with planetary gear 123.At this point, the contact area between spherical pad 140 and shell 110
Greatly, frictional force is bigger, and spherical pad 140 is static relative to shell 110.Conversely, the small end of the first spherical surface is contacted with shell 110,
And the big end of the second spherical surface is contacted with planetary gear 123.At this point, the contact area between spherical pad 140 and planetary gear 123
Greatly, frictional force is bigger, and spherical pad 140 is static relative to planetary gear 123.It is optimized, can be kept away by the radius to spherical surface
The case where exempting from the opposite sliding simultaneously of spherical pad 140 and shell 110, planetary gear 123 appearance, and this exactly causes differential mechanism different
Loud reason.Therefore, the riding experience of above-mentioned electric car is effectively promoted.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. a kind of differential mechanism characterized by comprising
Shell has Internal Spherical Surface；
Planetary gear train, including the planet for being fixed on the intracorporal gear shaft of the shell and being rotatablely arranged on the gear shaft
Gear, the planetary gear have spherical outside surface towards the side of the Internal Spherical Surface；
Output precision, including axle shaft gear and the output axle shaft being fixedly connected with the axle shaft gear, the axle shaft gear and institute
State planetary gear engagement；And
Spherical pad is sheathed on the planetary gear shaft and is held between the Internal Spherical Surface and the spherical outside surface, the spherical surface
Gasket has the first spherical surface towards the side of the Internal Spherical Surface, has the second spherical surface towards the side of the spherical outside surface；
Wherein, the spherical radius of first spherical surface and the spherical radius of second spherical surface are respectively greater than or are less than the interior ball
The spherical radius of the spherical radius in face and the spherical outside surface.
2. differential mechanism according to claim 1, which is characterized in that set between the axle shaft gear and the inner wall of the shell
It is equipped with flat pad.
3. differential mechanism according to claim 1, which is characterized in that the planetary gear includes two, two planets
Gear is opposite and interval is arranged.
4. differential mechanism according to claim 3, which is characterized in that the output precision is two, and each output
The axle shaft gear of component is engaged with two planetary gears.
5. a kind of transmission assembly characterized by comprising
Speed reducer；And
Such as the described in any item differential mechanisms of above-mentioned Claims 1-4, the output end of the speed reducer and shell transmission connect
It connects.
6. a kind of electric car, which is characterized in that including battery, motor and the transmission assembly as described in the claims 5,
The input terminal of the output shaft of the motor and the speed reducer is sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821589343.6U CN208951253U (en) | 2018-09-28 | 2018-09-28 | Electric car and its transmission assembly, differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821589343.6U CN208951253U (en) | 2018-09-28 | 2018-09-28 | Electric car and its transmission assembly, differential mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208951253U true CN208951253U (en) | 2019-06-07 |
Family
ID=66739816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821589343.6U Active CN208951253U (en) | 2018-09-28 | 2018-09-28 | Electric car and its transmission assembly, differential mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208951253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692308A (en) * | 2020-06-12 | 2020-09-22 | 株洲齿轮有限责任公司 | Method for reducing wear of differential shell |
-
2018
- 2018-09-28 CN CN201821589343.6U patent/CN208951253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692308A (en) * | 2020-06-12 | 2020-09-22 | 株洲齿轮有限责任公司 | Method for reducing wear of differential shell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9297447B2 (en) | Transmission system of hybrid electric vehicle | |
| US8007391B2 (en) | Differential apparatus for vehicle | |
| US9033844B2 (en) | Differential gear | |
| US10989297B2 (en) | Electric powertrain with sun bearing | |
| US8376886B2 (en) | Coaxial epicyclic gear train with bidirectional input and one-way output | |
| US20090325754A1 (en) | Differential gear device for vehicle | |
| WO2018099392A1 (en) | Planetary speed reducer with small tooth difference, in-vehicle display, and vehicle | |
| CN205331352U (en) | Spur gear differential mechanism | |
| CN109458440B (en) | Double-flow gearbox | |
| CN208951253U (en) | Electric car and its transmission assembly, differential mechanism | |
| CN105848949A (en) | Traction system for hybrid vehicle | |
| CN104154207A (en) | Differential with functions of torque vector control and mechanical differential locking | |
| KR101805100B1 (en) | The two-speed transmission using differential gear assembly | |
| CN108116327A (en) | Vehicle-mounted display screen device and vehicle | |
| CN205654786U (en) | Planetary speed reducer | |
| CN205278252U (en) | Transmission that elder generation's differential commutated and changes speed | |
| WO2015039611A1 (en) | Coaxial motor variable torque differential assembly | |
| US7479085B2 (en) | Axle having dual planetary reduction | |
| CN209818660U (en) | Planet wheel hub reduction gear | |
| WO2020007318A1 (en) | Vehicle transmission apparatus and vehicle | |
| CN208311368U (en) | A kind of three-cylinder engine balance shaft apparatus and automobile | |
| CN102943854A (en) | Planet friction wheel reducing speed increaser | |
| CN202418456U (en) | Circular conical surface friction planetary transmission | |
| CN206606053U (en) | A kind of engineering machinery main tumbler of high speed high pulling torque | |
| CN105240458A (en) | Joint speed reducer applied to industrial robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |