CN207598901U - Power assisted gearshift failsafe structure - Google Patents
Power assisted gearshift failsafe structure Download PDFInfo
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- CN207598901U CN207598901U CN201721539005.7U CN201721539005U CN207598901U CN 207598901 U CN207598901 U CN 207598901U CN 201721539005 U CN201721539005 U CN 201721539005U CN 207598901 U CN207598901 U CN 207598901U
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- shaft
- input shaft
- power assisted
- assisted gearshift
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Abstract
The utility model belongs to transmission operation system regions, and in particular to a kind of power assisted gearshift failsafe structure, including input shaft and output shaft, output sleeve is located at outside input shaft, further includes stiff shaft；Input shaft is equipped with through-hole, and output shaft is equipped with the first hole and the second hole；Stiff shaft sequentially passes through the first hole, through-hole and the second hole so as to which input shaft and output shaft be connected.Valve opening stroke can be effectively reduced using the technical program, improve driver comfort；It improves and forces reliability of putting into gear, enhance drive safety.
Description
Technical field
The utility model belongs to transmission operation system regions, and in particular to a kind of power assisted gearshift failsafe structure.
Background technology
Gearbox is the core devices of motor vehicles, carries out different road conditions and speed in vehicle travel process by shifting gears
Degree requirement, therefore the quality for performance of shifting gears embodies safety, convenience and comfort that gearbox uses.The gearshift of gearbox
Mode is mostly to be shifted gears using cylinder shift fork；And cylinder is controlled often with valve mating reaction by the keying of valve
Gas flows, so as to drive the reciprocating motion of the pistons in cylinder.
Be equipped with core transmission component input shaft and output shaft in existing power assisted gearshift cylinder valve, the diameter of output shaft compared with
Big and hollow setting, output sleeve are located at outside input shaft, and wherein input shaft is used to transmit the power of gear level application, is helped in gearshift
When power cylinder deactivation, input shaft imparts power to output shaft by independent spring structure, and final realize forces gearshift.
At present in the operational process of vehicle, especially on heavy trucks the driver during slope, helped using existing gearshift
Power cylinder valve had the following problems during pressure gearshift：1st, it is spring due to being used between input shaft and output shaft
Structure, so when gearshift, valve opening stroke is longer, and neutral gear stroke is longer during gearshift, and driver comfort is relatively low；2nd, exist
When power assisted gearshift cylinder trouble fails, driver needs to put into gear by force, the existing power assisted gearshift cylinder valve using spring structure
Door during putting into gear by force, it is more likely that occurs leading to spring failure due to dynamics is excessive, and can not achieve pressure and put into gear, i.e.,
The reliability that pressure is put into gear is relatively low, and drive safety is not high.
Invention content
The purpose of the present invention is to provide a kind of power assisted gearshift failsafe structures, can effectively reduce valve opening stroke,
Improve driver comfort；It improves and forces reliability of putting into gear, enhance drive safety.
In order to achieve the above objectives, the base case of the utility model is as follows：Power assisted gearshift failsafe structure, including input
Axis and output shaft, output sleeve are located at outside input shaft, further include stiff shaft；Input shaft is equipped with through-hole, and output shaft is equipped with the
One hole and the second hole；Stiff shaft sequentially passes through the first hole, through-hole and the second hole and connects input shaft and output shaft.
Compared with using the structure of spring passing power in the prior art, the advantageous effect of above-mentioned technical proposal is：
1st, it sequentially passes through the first hole, through-hole and the second hole by stiff shaft to connect input shaft and output shaft, with showing
Have in technology and compared using the flexible connection mode of spring, the technical program can avoid spring pressure by rigidly connected mode
The process of compression deformation, so as to effectively shorten the opening travel of valve, neutral position sliding stroke when reducing gearshift helps to improve driving
Comfort.
2nd, when the failure of power assisted gearshift cylinder trouble is put into gear by force, the gearshift with using spring structure in the prior art
Power-assisted cylinder valve is compared, and the technical program passes through rigid axis connection input shaft and output shaft so that driver is putting into gear by force
When, it is possible to prevente effectively from spring cannot restore deformation, so that happening for gearshift cannot be forced due to stress is excessive, and adopt
The larger shearing force of input shaft can be born with stiff shaft, pressure can be effectively improved and put into gear reliability, enhances drive safety, it is right
Driver puts into gear play a protective role by force.
Preferred embodiment one, as the preferred embodiment of basic scheme, the both ends of stiff shaft respectively with the first hole and the second hole mistake
It is full of cooperation, the diameter of stiff shaft is less than the diameter of through-hole.
The advantageous effect of above-mentioned technical proposal is：
1st, pass through interference fit so that stiff shaft, so as to fulfill being fastenedly connected, is connected by the elastic pressure of input shaft circumferential direction
Connect stabilization, pressure reliability of putting into gear is stronger.
2nd, the diameter of stiff shaft is less than the diameter of through-hole, can prevent input shaft axial movement apart from excessive, limiter valve
During unlatching to greatest extent.
Preferred embodiment two, as the preferred embodiment of basic scheme, the first hole is through hole, and the second hole is blind hole.In this way,
When being inserted into stiff shaft, one end of stiff shaft can be allowed to pass sequentially through the through-hole of through hole, input shaft, be finally against blind hole again
On, it is easy to operate, moreover it is possible to stiff shaft to be avoided to be pierced by from the second hole, the connection between input shaft is more preferably secured, stablizes.
Preferred embodiment three, as the preferred embodiment of basic scheme, preferred embodiment one or preferred embodiment two, stiff shaft,
The longitudinal section in one hole and the second hole is circle.In this way, stiff shaft connect more preferably secured with the first hole, the second hole, process simultaneously
Simply, flexibility ratio is larger.
The preferred embodiment of preferred embodiment four, preferably three, the longitudinal section of through-hole is ellipse.The through-hole of ellipse
Stiff shaft can be allowed not generate interference to input shaft, ensure in normal driving process (when not having to force gearshift), input shaft
It is not influenced by stiff shaft, reduces the operating force of operating lever.
The difference of the preferred embodiment of preferred embodiment five, preferably four, the major radius of through-hole and the radius of stiff shaft is
0.2~0.3mm.The through-hole of this size not only can effectively prevent stiff shaft and generate interference to input shaft, moreover it is possible to avoid through-hole mistake
The situation that input shaft is allowed to rotate caused greatly ensures that input shaft is normally axially moved, and gearshift performance is more stable.
Description of the drawings
Fig. 1 is the structure diagram of the utility model power assisted gearshift failsafe structure embodiment；
Fig. 2 is the sectional view along A-A of input shaft in Fig. 1.
Specific embodiment
Below by the further details of explanation of specific embodiment：
Reference numeral in Figure of description includes：Input shaft 1, through-hole 10, output shaft 2, through hole 20, blind hole 21, circle
Pin 3.
Embodiment is substantially as shown in Figure 1：Power assisted gearshift failsafe structure, including input shaft 1 and output shaft 2, output
Axis 2 is set in outside input shaft 1, further includes stiff shaft, and the preferred longitudinal section of stiff shaft is circular straight pin 3；Input shaft 1 is equipped with
Through-hole 10, the longitudinal section of through-hole 10 is oval, and elliptical long axis direction and axial parallel, the diameter of straight pin 3 of input shaft 1
Less than the diameter of through-hole 10, and the difference of the radius of the major radius of through-hole 10 and straight pin 3 is 0.2~0.3mm, and the present embodiment is preferred
0.25mm not only can effectively prevent vehicle in normally travel in this way, and straight pin 3 generates interference to input shaft 1, moreover it is possible to keep away
Exempt from through-hole 10 it is excessive and cause allow input shaft 1 rotate situation, ensure input shaft 1 normally be axially moved.
As shown in Fig. 2, output shaft 2 is equipped with the first hole and the second hole, the first hole is preferably that longitudinal section is run through to be circular
Hole 20, the second hole are preferably that longitudinal section is circular blind hole 21；Straight pin 3 sequentially passes through through hole 20, through-hole 10 and blind hole 21
So as to which input shaft 1 and output shaft 2 be connected, i.e. the axis of straight pin 3 and input shaft 1, the axis of output shaft 2 is vertical, and
The both ends of straight pin 3 are interference fitted respectively with through hole 20 and blind hole 21, so as to fasten straight pin 3 and output shaft 2 well, more
Excellent, the longitudinal center line coincidence of the longitudinal center line and through hole 20, through-hole 10, blind hole 21 of straight pin 3.
The present embodiment uses the rigid connection of straight pin 3, meanwhile, the both ends of straight pin 3 and 2 interference of output shaft are matched
It closes, and shape, the magnitude relationship of the diameter of the through-hole 10 on the diameter of ingehious design straight pin 3 and input shaft 1, can not only avoid
The process of compression deformation of the spring of the prior art so as to effectively shorten the opening travel of valve, reduces neutral position sliding stroke, has
Help improve driver comfort；It can also effectively avoid spring that from cannot restoring deformation due to stress is excessive, conversely, straight pin 3 can be with
The larger shearing force of input shaft 1 is born, is put into gear reliability so as to improve pressure, enhances drive safety.
Above-described is only the embodiment of the utility model, and the common sense such as well known concrete structure and characteristic are herein in scheme
It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure
Under, several modifications and improvements can also be made, these should also be considered as the scope of protection of the utility model, these are not all interfered with
The effect and practical applicability that the utility model is implemented.This application claims protection domain should be with the content of its claim
Subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (6)
1. power assisted gearshift failsafe structure, including input shaft and output shaft, the output sleeve is located at outside input shaft, feature
It is：Further include stiff shaft；The input shaft is equipped with through-hole, and the output shaft is equipped with the first hole and the second hole；It is described firm
Property axis sequentially passes through the first hole, through-hole and the second hole and connects input shaft and output shaft.
2. power assisted gearshift failsafe structure according to claim 1, it is characterised in that：The both ends difference of the stiff shaft
It is interference fitted with the first hole and the second hole, the diameter of the stiff shaft is less than the diameter of the through-hole.
3. power assisted gearshift failsafe structure according to claim 1, it is characterised in that：First hole is through hole,
Second hole is blind hole.
4. according to the power assisted gearshift failsafe structure described in claim 1,2 or 3, it is characterised in that：The stiff shaft, first
The longitudinal section in hole and the second hole is circle.
5. power assisted gearshift failsafe structure according to claim 4, it is characterised in that：The longitudinal section of the through-hole is ellipse
It is round.
6. power assisted gearshift failsafe structure according to claim 5, it is characterised in that：The major radius of the through-hole and just
Property axis radius difference be 0.2~0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721539005.7U CN207598901U (en) | 2017-11-17 | 2017-11-17 | Power assisted gearshift failsafe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721539005.7U CN207598901U (en) | 2017-11-17 | 2017-11-17 | Power assisted gearshift failsafe structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207598901U true CN207598901U (en) | 2018-07-10 |
Family
ID=62759761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721539005.7U Active CN207598901U (en) | 2017-11-17 | 2017-11-17 | Power assisted gearshift failsafe structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207598901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185792A (en) * | 2019-06-28 | 2019-08-30 | 一汽解放汽车有限公司 | A kind of speed changer and power assisted gearshift device are transferred box assembly |
-
2017
- 2017-11-17 CN CN201721539005.7U patent/CN207598901U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185792A (en) * | 2019-06-28 | 2019-08-30 | 一汽解放汽车有限公司 | A kind of speed changer and power assisted gearshift device are transferred box assembly |
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