CN108223745A

CN108223745A - A kind of four-speed compares gear

Info

Publication number: CN108223745A
Application number: CN201611185513.XA
Authority: CN
Inventors: 周平
Original assignee: Chongqing Hard Core Drive Technology Co Ltd
Current assignee: Chongqing Hard Core Drive Technology Co Ltd
Priority date: 2016-12-21
Filing date: 2016-12-21
Publication date: 2018-06-29

Abstract

The present invention provides a kind of four-speed than gear, including：Input shaft, output shaft, rack, and three speed compare epicyclic transmission, one two speed compares gear, three speed include planetary gear set than epicyclic transmission, input link, output link, first shifting device, second shifting device, sun gear selects to be coupled transmission movement and torque with input link or rack by the first shifting device, gear ring selects to be coupled transmission movement and torque with input link or rack by the second shifting device, two speed include forward gear transmission than gear, backward gear transmission, third shifting device, forward gear transmission or backward gear transmission is selected to transmit movement and torque between input shaft and output shaft by third shifting device.

Description

A kind of four-speed compares gear

Technical field

The present invention relates to automotive transmission technical field, more particularly to a kind of four-speed compares gear.

Background technology

In certain application scenarios, dynamical system is needed to provide wide in range rotating speed and torque output, as driving cycle is complicated Automobile, for meet start to walk, accelerate, climb, a variety of driving cycle needs driving wheels such as run at high speed have wide in range rotating speed and torque Range, and automobile engine be typically only capable to the rotating speed section of relative narrowness provide limited range torque output, using with The speed changer extension output speed and torque range of multiple gearratios can meet the changeable driving cycle of Automobile Complex to rotating speed The huge power demand with torque difference.

It is necessary to have compact-sized, transmission efficiency, reliable service life as important automobile component for automotive transmission The features such as long, there are many being automotive transmission using gasoline engine or diesel engine as the automotive development of engine, some uses are more It is multiple that group epicyclic gear train and fluid torque-converter realize that multiple gearratios, some are realized using the gear pair of a variety of different gear ratios Gearratio, the use having change input shaft pulley and export the biography that the acquisition of the shaft pulley radius of clean-up can change in some gearratio section Dynamic ratio etc., these speed changers are to improving automobile dynamic quality and improving fuel economy contribution brilliance, but these speed changers are full The higher and higher user demand of foot, structure become increasingly complex, and manufacture difficulty is big, with high costs.

Invention content

The object of the present invention is to provide a kind of compact-sized, light-weight, transmission efficiency, reliable, long lifespans, use Planetary gear set is driven and tool to compare gear there are four the four-speed of forward speed ratio.

To achieve the above object, the technical solution taken of the present invention is：A kind of four-speed is provided than gear, including：It is defeated Enter axis, output shaft, rack, the four-speed further includes one three speed than epicyclic transmission, two speed than gear Than gear, three speed include planetary gear set, input link, output link, the first shifting than epicyclic transmission Device, the second shifting device, planetary gear set include a sun gear, a gear ring, a planet carrier, several planetary gears, Input link transmits movement and torque or by connecting transmission torque or merging into same structure with input shaft or by gear pair Part, sun gear are selected to be coupled with input link or rack to transmit and be moved and torque by the first shifting device, and gear ring passes through the The selection of two shifting devices, which is coupled to transmit with input link or rack, to be moved and torque, and planet carrier and output link or pass through is connect It transmits torque or merges into same component, output link is with output shaft or transmits movement and torque by gear pair or passes through company Connect and transmit torque or merge into same component, two speed than gear include forward gear transmission, backward gear transmission, Third shifting device, by third shifting device select forward gear transmission or backward gear transmission input shaft with Movement and torque are transmitted between output shaft.

In some embodiments, input shaft merges into same component with input link, and planet carrier merges with output link For same component, output link transmits movement and torque with output shaft by gear pair, and two speed are than the forward gear of gear The input gear of transmission and the input gear of backward gear transmission are arranged on input shaft, and two speed are than the advance of gear The output gear of gear driving pair and the output gear of backward gear transmission are arranged on output shaft.

In some embodiments, input shaft can also transmit torque with input link by connecting, planet carrier and output Component can also transmit torque by connection.

In some embodiments, input shaft and input link transmit movement and torque by gear pair, planet carrier with it is defeated Go out component and merge into same component, output link merges into same component with output shaft, and two speed are than the forward gear of gear The input gear of transmission and the input gear of backward gear transmission are arranged on input shaft, and two speed are than the advance of gear The output gear of gear driving pair and the output gear of backward gear transmission are arranged on output shaft.

In some embodiments, planet carrier and output link can also transmit torque by connecting, output link with it is defeated Shaft can also transmit torque by connection.

In some embodiments, the first shifting device include connect with input link the first shifting driving link, The first shifting driven member being connect with sun gear, the first shifting fastener being connect with rack, the first shifting driven member Can be coupled respectively with the first shifting driving link or the first shifting fastener transmit torque, the second shifting device include with it is defeated The the second shifting driving link for entering component connection, the second shifting driven member being connect with gear ring, the second choosing being connect with rack Gearshift fastener, the second shifting driven member can be coupled transmission with the second shifting driving link or the second shifting fastener respectively Torque, third shifting device include with input shaft or export the third shifting connecting shaft part of axis connection, are driven with forward gear The forward gear pair shifting part of secondary input or output gear connection connects with the input of backward gear transmission or output gear The backward gear pair shifting part connect, the connecting shaft part of third shifting device can respectively with forward gear pair shifting part or retrogressing Gear pair shifting part, which is coupled, transmits torque.

In some embodiments, the first shifting driven member can neither be coupled with the first shifting driving link nor with One shifting fastener is coupled, and the second shifting driven member can neither be coupled with the second shifting driving link nor be changed with the second choosing Block latch fitting is coupled, and the connecting shaft part of third shifting device can neither be coupled with forward gear pair shifting part nor with retreating tooth Wheel set shifting part is coupled.

In some embodiments, the gear pair between the input shaft and input link, output link and output shaft it Between gear pair, two speed than gear forward gear transmission, two speed than gear backward gear transmissions tooth Wheel can be replaced completely or partially by sprocket wheel or belt wheel.

In some embodiments, as tool, there are four forward speed ratio and a reverse speed ratios than gear for the four-speed Four-speed gear box.

In some embodiments, the four-speed than gear and other Mechanism Combinations into multi-ratio speed transmission.

Input link of the present invention generally refers to the component of movement and torque input, but in certain purposes or operating mode, defeated Enter the output link that component also is used as movement and torque.

Output link of the present invention generally refers to the component of movement and torque output, but in certain purposes or operating mode, defeated Go out the input link that component also is used as movement and torque.

Rack of the present invention refers to the components such as the stent of case of transmission or mechanism, bearing.

Shifting device of the present invention refers to make what transmission parts were coupled two-by-two according to transmission connection relation demand Mechanism or device, such as synchronizer, clutch.

Advantageous effect

By the description of preceding solution, it is understood that four-speed provided by the invention can be obtained at least than gear and following be had One of beneficial effect is whole：

There is compact-sized, light-weight, transmission efficiency, reliable, long lifespan；

With various structures variant, a variety of arrangement demands can be met, be suitable for various application occasions；

There are four forward speed ratio and a reverse speed ratios for tool, and it is wider so as to meet not only to extend output speed and torque range General application demand, moreover it is possible to improve power performance, the delivery efficiency for improving engine；

Also because compact-sized, light-weight and have the characteristics that various structures variant adapts to a variety of arrangement demands so that according to this The four-speed of invention cannot be only used for four-speed than speed changer than gear, can also be expanded with other Mechanism Combinations as with more Multi-speed exchanged than speed changer meet more application demands.

Description of the drawings

Attached drawing as described herein is only used for illustrative purpose, it should be understood that illustrates and specific example is only intended to show Meaning purpose, range disclosed by the invention is limited without being intended to.

In the accompanying drawings, identical label consistently represents identical element, component or feature.

Fig. 1 is the schematic diagram than gear according to the four-speed of one of the preferred embodiment of the present invention.

Fig. 2 is the schematic diagram than gear according to two four-speed of the preferred embodiment of the present invention.

Reference sign

001st, gear is compared according to the four-speed of one of the preferred embodiment of the present invention；

002nd, gear is compared according to two four-speed of the preferred embodiment of the present invention；

01st, three speed compare epicyclic transmission；

02nd, two speed compare gear；

10th, rack（Or case of transmission）；

11st, input shaft；

12nd, input link；

13rd, output link；

14th, output shaft；

20th, planetary gear set；

21st, sun gear；

22nd, gear ring；

23rd, planet carrier；

24th, planetary gear；

30th, the first shifting device；

31st, the first shifting driving link；

32nd, the first shifting driven member；

33rd, the first shifting fastener；

40th, the second shifting device；

41st, the second shifting driving link；

42nd, the second shifting driven member；

43rd, the second shifting fastener；

50th, third shifting device；

51st, forward gear pair shifting part；

52nd, backward gear pair shifting part；

53rd, third shifting connecting shaft part；

60th, input shaft and input link gear driving pair；

61st, input shaft gear；

62nd, input link gear；

70th, forward gear transmission；

71st, the input gear of forward gear transmission；

72nd, the output gear of forward gear transmission；

80th, backward gear transmission；

81st, the input gear of backward gear transmission；

82nd, the output gear of backward gear transmission；

83rd, backward gear transmission reverses gear component；

90th, output link and output shaft gear transmission；

91st, output link gear；

92nd, output shaft gear.

Specific embodiment

For technical problem solved by the invention, technical solution and advantageous effect is more clearly understood, below in conjunction with attached Figure and preferred embodiment, the present invention is further described in detail.It should be understood that specific embodiments described below Only to illustrate, explain the present invention, it is substantially only exemplary rather than be intended for limitation disclosure of the invention, should With or purposes.

As shown in Figure 1, according to the four-speed of one of the preferred embodiment of the present invention than gear 001, including：Input shaft 11, Output shaft 14, rack 10, the four-speed further include one three speed than epicyclic transmission 01, one than gear 001 Two speed include planetary gear set 20, input link 12, output link than gear 02, three speed than epicyclic transmission 01 13rd, the first shifting device 30, the second shifting device 40, planetary gear set 20 include 21, gear rings 22 of a sun gear, One planet carrier 23, several planetary gears 24, input link 12 merge into same component with input shaft 11, and sun gear 21 passes through first Shifting device selection 30 is coupled transmission movement and torque with input link 12 or rack 10, and gear ring 22 is filled by the second shifting Put selection 40 is coupled with input link 12 or rack 10 transmit move and torque, planet carrier 23 merged into output link 13 same Component, output link 13 transmit movement and torque with output shaft 14 by gear pair 90, and two speed are included than gear 02 advances Gear driving pair 70, backward gear transmission 80, third shifting device 50 select advance tooth by third shifting device 50 Wheel transmission 70 or backward gear transmission 80 transmit movement and torque between input shaft 11 and output shaft 14.

Wherein, two speed than gear 02 forward gear transmissions input gear 71 and backward gear transmission it is defeated Enter gear 81 to be arranged on input shaft 11, two speed are than the output gear 72 of the forward gear transmission of gear 02 and retrogressing tooth The output gear 82 of wheel transmission is arranged on the output shaft 14.

In addition, it can be appreciated that input shaft 11 can also pass through with input link 12 connect（Such as spline connection mode）It passes Torque delivery, planet carrier 23 can also pass through with output link 13 to be connect（Such as spline connection mode）Transmit torque.

In addition, the first shifting device 30 includes the first shifting driving link 31 and the sun being connect with input link 12 First shifting driven member 32 of 21 connection of wheel, the first shifting fastener 33 being connect with rack 10, the first shifting are driven Part 32 can be coupled with the first shifting driving link 31 or the first shifting fastener 33 respectively transmits torque, the second shifting device 40 comprising connect with input link 12 the second shifting driving link 41, connect with gear ring 22 the second shifting driven member 42, The second shifting fastener 43 being connect with rack 10, the second shifting driven member 42 can respectively with the second shifting driving link 41 Or second shifting fastener 43 be coupled transmit torque, third shifting device 50 include and input shaft 11（Or output shaft 14）Even Third shifting connecting shaft part 53, the input gear 71 with forward gear transmission connect（Or output gear 72）The advance tooth of connection Wheel set shifting part 51, the input gear 81 with backward gear transmission（Or output gear 82）The backward gear pair choosing of connection is changed Block piece 52, the connecting shaft part 53 of third shifting device can respectively with forward gear pair shifting part 51 or backward gear pair shifting Part 52, which is coupled, transmits torque.

In addition, the first shifting driven member 32 can neither be coupled with the first shifting driving link 31 and also with the first shifting Fastener 33 is coupled, the second shifting driven member 42 can neither be coupled with the second shifting driving link 41 and also with the second shifting Fastener 43 is coupled, the connecting shaft part 53 of third shifting device can neither be coupled with forward gear pair shifting part 51 and also with it is rear Gear pair shifting part 52 is moved back to be coupled.

To more fully understand the four-speed according to one of the preferred embodiment of the present invention than gear 001, below to the implementation The movement of four forward speed ratios and reverse speed ratios and the transmission situation of torque are described in detail in example：

Movement of three speed than 01 first fast ratio of epicyclic transmission and torque transmit：

The first shifting driven member 32 is made to be coupled with the first shifting driving link 31, makes the second shifting driven member 42 and the second choosing Gearshift fastener 43 be coupled, make the connecting shaft part 53 of third shifting device be neither coupled with forward gear pair shifting part 51 nor It is coupled with backward gear pair shifting part 52.

Movement and torque are by input shaft 11（Input link 12）Input, through the first shifting driving link 31, the first shifting Driven member 32 is transferred to sun gear 21, and being connect the second choosing with rack 10 with the gear ring 22 that the second shifting driven member 42 is connect changes Block latch fitting 43 locks, and movement and torque are exported by planet carrier 23 to output after being slowed down by 21 input planet gear group 20 of sun gear Component 13, movement and torque output link gear 91, output shaft gear through output link Yu output shaft gear transmission 90 again 92 are transferred to output shaft 14.

Movement of three speed than 01 second fast ratio of epicyclic transmission and torque transmit：

The first shifting driven member 32 is made to be coupled with the first shifting fastener 33, makes the second shifting driven member 42 and the second choosing Gearshift driving link 41 be coupled, make the connecting shaft part 53 of third shifting device be neither coupled with forward gear pair shifting part 51 nor It is coupled with backward gear pair shifting part 52.

Movement and torque are by the first input shaft 11（Input link 12）Input is selected through the second shifting driving link 41, second Gearshift driven member 42 is transferred to gear ring 22, and first is connect with rack 10 with the sun gear 21 that the first shifting driven member 32 is coupled Shifting fastener 33 locks, and movement and torque are exported by planet carrier 23 to defeated after being slowed down by 22 input planet gear group 20 of gear ring Go out component 13, movement and torque output link gear 91, output shaft tooth through output link Yu output shaft gear transmission 90 again Wheel 92 is transferred to output shaft 14.

The movement of three speed ratio faster than 01 third of epicyclic transmission and torque transmit：

The first shifting driven member 32 is made to be coupled with the first shifting driving link 31, makes the second shifting driven member 42 and the second choosing Gearshift driving link 41 be coupled, make the connecting shaft part 53 of third shifting device be neither coupled with forward gear pair shifting part 51 nor It is coupled with backward gear pair shifting part 52.

Movement and torque are by the first input shaft 11（Input link 12）Input, movement and torque are through the first shifting driving link 31st, the first shifting driven member 32 is transferred to sun gear 21, is passed through the second shifting driving link 41, the second shifting driven member 42 Gear ring 22 is handed to, movement and torque after sun gear 21,22 input planet gear group 20 of gear ring by planet carrier 23 by being exported to output Component 13, movement and torque output link gear 91, output shaft gear through output link Yu output shaft gear transmission 90 again 92 are transferred to output shaft 14.

Two movements of the speed than 02 forward speed ratio of gear and torque transmit：

The connecting shaft part 53 of third shifting device is coupled with forward gear pair shifting part 51, has made the first shifting driven member 32 both Be not coupled with the first shifting driving link 31 be not also coupled with the first shifting fastener 33 or the second shifting driven member 42 both It is not coupled with the second shifting driving link 41 and is not also coupled with the second shifting fastener 43.

Movement and torque are inputted by input shaft 11, the connecting shaft part 53 through third shifting device, forward gear pair shifting Part 51, the input gear 71 of forward gear transmission, output gear 72 are transferred to output shaft 14.

Two movements of the speed than 02 reverse speed ratios of gear and torque transmit：

The connecting shaft part 53 of third shifting device is coupled with backward gear pair shifting part 52, has made the first shifting driven member 32 both Be not coupled with the first shifting driving link 31 be not also coupled with the first shifting fastener 33 or the second shifting driven member 42 both It is not coupled with the second shifting driving link 41 and is not also coupled with the second shifting fastener 43.

Movement and torque are inputted by input shaft 11, the connecting shaft part 53 through third shifting device, backward gear pair shifting Part 52, the input gear 81 of backward gear transmission, reverse gear 83, output gear 82 are transferred to output shaft 14.

It can be appreciated that movement is transmitted because three speed are more in parallel than gear 02 than 01 and two speed of epicyclic transmission and is turned round Square, therefore three speed are than three speed ratios of epicyclic transmission 01 and two fast forward speed ratio, one than gear 02 A retrogressing gear ratio can be combined into four advance gear ratio and a reverse speed ratios, this five speed than can alternate application, therefore four-speed Gear 001 can obtain four forward speed ratios, a reverse speed ratios altogether.

It should be noted that three speed cannot transmit movement and torque in situations below than epicyclic transmission 01：

When the first shifting driven member 32 be neither coupled with the first shifting driving link 31 and also with the first shifting fastener 33 During connection：Sun gear 21 is in free state, and torque can not be transmitted between input link 12 and output link 13.

When the second shifting driven member 42 is neither coupled with the second shifting driving link 41 nor is only locked with the second shifting When part 43 is coupled：Gear ring 22 is in free state, and torque can not be transmitted between input link 12 and output link 13.

When meeting any one or two kinds of situations in both the above situation and meeting simultaneously, three speed compare planetary gear speed-changing Mechanism 01 cannot transmit movement and torque, be that three speed are in neutral position state than epicyclic transmission 01.

It is also noted that two speed cannot transmit movement and torque in situations below than gear 02：

When the connecting shaft part 53 of third shifting device is neither coupled with forward gear transmission shifting part 51 nor with retreating tooth When taking turns 52 connection of transmission shifting part：Movement and torque can not be transmitted between input shaft 11 and output shaft 14, at this time two fast ratios Gear 02 is in neutral position state.

When three speed are in neutral position state than 01 and two speed of epicyclic transmission than gear 02, input shaft 11 Torque and movement cannot be transmitted between output shaft 14, according to the four-speed of one of the preferred embodiment of the present invention than gear 001 Obtain neutral position state.

It is to be further noted that three speed can also be locked output link 13 than epicyclic transmission 01 in situations below Firmly, it is impossible to rotate：When the first shifting driven member 32 is coupled with the first shifting fastener 33, and the second shifting driven member 42 When being coupled with the second shifting fastener 43：Is connect with rack 10 with the sun gear 21 that the first shifting driven member 32 is coupled One shifting fastener 33 locks, and the second shifting is connect with rack 10 with the gear ring 22 that the second shifting driven member 42 is connect Fastener 43 locks, and planet carrier 23 cannot rotate, and because output link 13 connect or merge into same component with planet carrier, therefore has Being lockable with output link 13 cannot rotate, and be moored according to the four-speed of one of the preferred embodiment of the present invention than gear 001 Car bumper.

It can be appreciated that in the four-speed according to one of the preferred embodiment of the present invention than in gear 001, forward gear is driven Pair 70, backward gear transmission 80 and output link and output shaft gear transmission 90 gear can completely or partially by sprocket wheel or Belt wheel is replaced.

As shown in Fig. 2, according to two four-speed of the preferred embodiment of the present invention than gear 002, including：Input shaft 11, Output shaft 14, rack 10, the four-speed further include one three speed than epicyclic transmission 01, one than gear 002 Two speed include planetary gear set 20, input link 12, output link than gear 02, three speed than epicyclic transmission 01 13rd, the first shifting device 30, the second shifting device 40, planetary gear set 20 include 21, gear rings 22 of a sun gear, One planet carrier 23, several planetary gears 24, input link 12 transmit movement and torque, the sun with input shaft 11 by gear pair 60 Wheel 21 is coupled transmission movement with input link 12 or rack 10 by the first shifting device selection 30 and torque, gear ring 22 pass through Second shifting device selection 40 is coupled transmission movement and torque, planet carrier 23 and output link with input link 12 or rack 10 13 merge into same component, and output link 13 merges into same component with output shaft 14, and two speed are included than gear 02 advances Gear driving pair 70, backward gear transmission 80, third shifting device 50 select advance tooth by third shifting device 50 Wheel transmission 70 or backward gear transmission 80 transmit movement and torque between input shaft 11 and output shaft 14.

In addition, it can be appreciated that planet carrier 23 can also pass through with output link 13 connect（Such as spline connection mode）It passes Torque delivery, output link 13 can also pass through with output shaft 14 to be connect（Such as spline connection mode）Transmit torque.

To more fully understand two four-speed according to the preferred embodiment of the present invention than gear 002, below to the implementation The movement of four forward speed ratios and reverse speed ratios and the transmission situation of torque are described in detail in example：

Movement and torque are inputted by input shaft 11, the input shaft gear through input shaft Yu input link gear driving pair 60 61st, input link gear 62 is transferred to input link 12, then is passed through the first shifting driving link 31, the first shifting driven member 32 Sun gear 21 is handed to, the second shifting fastener 43 is connect with rack 10 with the gear ring 22 that the second shifting driven member 42 is connect It locks, movement and torque are exported by planet carrier 23 to output link 13 after being slowed down by 21 input planet gear group 20 of sun gear（It is defeated Shaft 14）.

Movement and torque are inputted by input shaft 11, the input shaft gear through input shaft Yu input link gear driving pair 60 61st, input link gear 62 is transferred to input link 12, then is passed through the second shifting driving link 41, the second shifting driven member 42 Gear ring 22 is handed to, the first shifting fastener 33 is connect with rack 10 with the sun gear 21 that the first shifting driven member 32 is coupled It locks, movement and torque are exported by planet carrier 23 to output link 13 after being slowed down by 22 input planet gear group 20 of gear ring（Output Axis 14）.

Movement and torque are inputted by input shaft 11, the input shaft gear through input shaft Yu input link gear driving pair 60 61st, input link gear 62 is transferred to input link 12, movement and torque through the first shifting driving link 31, the first shifting from Moving part 32 is transferred to sun gear 21, and gear ring 22 is transferred to through the second shifting driving link 41, the second shifting driven member 42, movement With torque by being exported after sun gear 21,22 input planet gear group 20 of gear ring by planet carrier 23 to output link 13（Output shaft 14）.

Movement and torque are inputted, then the input gear 71 through advance gear driving pair, output gear 72 are passed by input shaft 11 Forward gear pair shifting part 51 is handed to, then the connecting shaft part 53 through third shifting device is transferred to output shaft 14.

Movement and torque are inputted by input shaft 11, then the input gear 81 through backward gear transmission, reverse gear 83, defeated Go out gear 82 and be transferred to backward gear pair shifting part 52, then the connecting shaft part 53 through third shifting device is transferred to output shaft 14。

When three speed are in neutral position state than 01 and two speed of epicyclic transmission than gear 02, input shaft 11 Torque and movement cannot be transmitted between output shaft 14, according to two four-speed of the preferred embodiment of the present invention than gear 002 Obtain neutral position state.

It is to be further noted that three speed can also be locked output link 13 than epicyclic transmission 01 in situations below Firmly, it is impossible to rotate：When the first shifting driven member 32 is coupled with the first shifting fastener 33, and the second shifting driven member 42 When being coupled with the second shifting fastener 43：Is connect with rack 10 with the sun gear 21 that the first shifting driven member 32 is coupled One shifting fastener 33 locks, and the second shifting is connect with rack 10 with the gear ring 22 that the second shifting driven member 42 is connect Fastener 43 locks, and planet carrier 23 cannot rotate, and because output link 13 connect or merge into same component with planet carrier, therefore has Being lockable with output link 13 cannot rotate, and be moored according to two four-speed of the preferred embodiment of the present invention than gear 002 Car bumper.

It can be appreciated that in two four-speed according to the preferred embodiment of the present invention than in gear 002, input shaft is with inputting The gear of element gears transmission 60, forward gear transmission 70 and backward gear transmission 80 can completely or partially by sprocket wheel or Belt wheel is replaced.

In conclusion be understood that four-speed according to the present invention can not only be obtained than gear four forward speed ratios and One reverse speed ratios, and also there is various structures and arrangement form, a variety of application demands can be met；It is also apparent that according to this hair Bright four-speed than gear can be used not only as tool there are four forward speed ratio four-speed gear box, also can with other Mechanism Combinations into Multi-ratio speed transmission.

In addition, it is also apparent that four-speed according to the present invention than gear because using Planetary Gear Transmission, using synchronization Device（Or clutch etc.）Four-speed according to the present invention as block selecting device is a kind of to have compact-sized, weight than gear Gently, the gear for the advantages that bearing capacity is strong, transmission efficiency, reliable, long lifespan.

This is appreciated that the description more than present invention is only exemplary, and without departing from the variant of essence of the invention It is also within the scope of the present invention, this variant is not regarded as a departure from the spirit and scope of the invention.

Claims

1. a kind of four-speed is than gear, including：Input shaft, output shaft, rack, which is characterized in that the four-speed compares variable-speed motor Structure further includes one three speed than epicyclic transmission, two speed than gear, and three speed compare epicyclic transmission Comprising planetary gear set, input link, output link, the first shifting device, the second shifting device, planetary gear set includes One sun gear, a gear ring, a planet carrier, several planetary gears, input link transmit fortune with input shaft or by gear pair Dynamic and torque transmits torque by connection or merges into same component, sun gear by the first shifting device select with it is defeated Enter component or rack is coupled transmission movement and torque, gear ring selects to be coupled with input link or rack by the second shifting device Transmit movement and torque, planet carrier with output link or by connect transmission torque or merging into same component, output link and Output shaft transmits movement and torque by gear pair or transmits torque by connection or merge into same component, and two speed are than becoming Fast mechanism includes forward gear transmission, backward gear transmission, third shifting device, is selected by third shifting device Forward gear transmission or backward gear transmission transmit movement and torque between input shaft and output shaft.

2. four-speed according to claim 1 compares gear, which is characterized in that input shaft is merged into same with input link Component, planet carrier merge into same component with output link, and output link transmits movement and torque with output shaft by gear pair, Two speed are arranged in input than the input gear of forward gear transmission and the input gear of backward gear transmission of gear On axis, two speed are arranged in than the output gear of forward gear transmission and the output gear of backward gear transmission of gear On output shaft.

3. gear is compared according to the four-speed any in claim 1 to 2, which is characterized in that input shaft and input link Torque can also be transmitted by connection, planet carrier can also transmit torque with output link by connecting.

4. four-speed according to claim 1 compares gear, which is characterized in that input shaft passes through gear pair with input link Movement and torque are transmitted, planet carrier merges into same component with output link, and output link merges into same component with output shaft, Two speed are arranged in input than the input gear of forward gear transmission and the input gear of backward gear transmission of gear On axis, two speed are arranged in than the output gear of forward gear transmission and the output gear of backward gear transmission of gear On output shaft.

5. gear is compared according to the four-speed any in claim 1 or 4, which is characterized in that planet carrier and output link Torque can also be transmitted by connection, output link can also transmit torque with output shaft by connecting.

6. gear is compared according to the four-speed any in claim 1 to 5, which is characterized in that the first shifting device packet It is connect containing the first shifting driving link being connect with input link, the first shifting driven member being connect with sun gear, with rack The first shifting fastener, the first shifting driven member can respectively with the first shifting driving link or the first shifting fastener It is coupled and transmits torque, the second shifting device includes the second shifting driving link being connect with input link, connect with gear ring Second shifting driven member, the second shifting fastener being connect with rack, the second shifting driven member can be selected with second respectively Gearshift driving link or the second shifting fastener, which are coupled, transmits torque, and third shifting device is included to be connected with input shaft or output shaft The third shifting connecting shaft part that connects, be driven auxiliary input with forward gear or forward gear pair shifting part that output gear is connect, The backward gear pair shifting part being connect with backward gear transmission auxiliary input or output gear, the connecting shaft part of third shifting device It can be coupled respectively with forward gear pair shifting part or backward gear pair shifting part and transmit torque.

7. gear is compared according to the four-speed any in claim 1 to 6, which is characterized in that the first shifting driven member It can neither be coupled with the first shifting driving link nor be coupled with the first shifting fastener, the second shifting driven member can be neither It is coupled with the second shifting driving link and is not also coupled with the second shifting fastener, the connecting shaft part of third shifting device can be neither It is coupled with forward gear pair shifting part and is not also coupled with backward gear pair shifting part.

8. gear is compared according to the four-speed any in claim 1 to 7, which is characterized in that the input shaft and input The gear pair between gear pair, output link and output shaft between component, two speed than gear forward gear transmission, Two speed can be replaced completely or partially than the gear of the backward gear transmission of gear by sprocket wheel or belt wheel.

9. gear is compared according to the four-speed any in claim 1 to 8, which is characterized in that the four-speed compares variable-speed motor Structure is used as tool, and there are four forward speed ratios and the four-speed gear box of a reverse speed ratios.

10. gear is compared according to the four-speed any in claim 1 to 9, which is characterized in that the four-speed compares variable-speed motor Structure and other Mechanism Combinations are into multi-ratio speed transmission.