CN207257657U - A kind of drive pattern switching device and the vehicle with the device - Google Patents
A kind of drive pattern switching device and the vehicle with the device Download PDFInfo
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- CN207257657U CN207257657U CN201721294078.4U CN201721294078U CN207257657U CN 207257657 U CN207257657 U CN 207257657U CN 201721294078 U CN201721294078 U CN 201721294078U CN 207257657 U CN207257657 U CN 207257657U
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- lock assembly
- differential lock
- shift fork
- piston
- jackshaft
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Abstract
The utility model discloses a kind of drive pattern switching device, it includes：Differential lock assembly, jackshaft, slidably engage set and output shaft；Differential lock assembly slidably engages set slip with slidably engaging set connection, for driving；Set is slidably engaged respectively with jackshaft and output axis connection, is slidably engaged set and is used to make jackshaft and output axis connection or disconnection；Differential lock assembly, which is equipped with, is used for the sensor that indirect identification slidably engages set position.The beneficial effects of the utility model are compared with the prior art：The drive pattern switching device can be such that vehicle is travelled by tandem axle, and the power between tandem axle can also disconnected, is lifted rear axle assy according to operating mode, realize vehicle list bridge driving traveling.The device can enable the vehicle to preferably adapt to various different road conditions, and then improve fuel efficiency and save the purpose of fuel oil according to operation optimization system of vehicle transmission efficiency.The drive pattern switching device is installed on jackshaft output terminal, and installation dimension is short, and cost is relatively low.
Description
Technical field
It the utility model is related to vehicle transmission gear technical field, and in particular to a kind of drive pattern switching device and have
The vehicle of the device.
Background technology
At present, double drive axle applies quite varied, to be designed using double drive axle advantage on heavy-duty cargo truck
It is that it can match high-power engine, the dead weight of truck can be lifted, additionally it is possible to strengthens vehicle traveling
Stationarity, and can also disperse to undertake vehicle load to reduce vehicle to Road relative to single drive axle, double drive axle
The influence in face.But double drive axle design similarly existing defects, vehicle in motion, due to load-carrying is different or road conditions not
Together, required power is also different, and traditional double drive axle can not become the quantity for the middle drive axle that changes jobs, and part drive axle can not be into
Row lifting, drive pattern is more single, and the reasonable distribution of power can not be realized according to operating mode.For example, in vehicle zero load or institute
In the case of loading thing lighter in weight, traditional double drive axle remains that doube bridge drives, and driving force can be caused remaining, and then make
The oil consumption increase of vehicle.
On the one hand, further enhancing with national environmental protection consciousness, have to the relevant parameter such as oil consumption of vehicle traveling by
Walk harsh requirement；On the other hand, from the cost consideration for reducing car operation, design one kind can switch vehicle list bridge or doube bridge drives
The switchover apparatus of dynamic model formula is very necessary.The driving for participating in work can be changed by the drive pattern switching device
The quantity of bridge, and then realize the reasonable distribution of power.
In view of drawbacks described above, the utility model creator obtains this practicality newly finally by prolonged research and practice
Type.
Utility model content
To solve above-mentioned technological deficiency, the technical solution adopted in the utility model is, there is provided a kind of drive pattern switching
Device, it is characterised in that it includes：Differential lock assembly, jackshaft, slidably engage set and output shaft；The differential lock assembly with
It is described to slidably engage set connection, for driving the set that slidably engages to slide；It is described slidably engage set respectively with the jackshaft
With the output axis connection, the set that slidably engages is used to make the jackshaft and the output axis connection or disconnection；The difference
Fast lock assembly is equipped with the sensor for being used for that set position to be slidably engaged described in indirect identification.
Preferably, the differential lock assembly further includes the first housing, shift fork, sensor and piston component, the first shell
Body is equipped with the first housing through-hole, and the sensor is connected by first housing through-hole with first housing, the biography
Sensor is connected by first housing through-hole with the shift fork or the piston component；Described shift fork one end and the piston group
Part connects, and the other end slidably engages set connection with described.
Preferably, the shift fork links with the piston component；The sensor is connected with the shift fork, the shift fork with
The contact surface of the sensor is in inclined-plane, and the sensor is pressure switch or laser range sensor.
Preferably, the differential lock assembly further includes power set and elastic device, the power set and the elasticity
Device is connected with the piston component, and the forward and reverse movement of respectively described piston component provides power.
Preferably, the power set are air pump or caisson or hydraulic device or motor or electromagnet.
Preferably, being additionally provided with flange on the jackshaft, the first rolling bearing is socketed on the flange；The output shaft bag
Include output shaft to plug into end, output shaft end of plugging into is equipped with and is used to accommodating the recessed of the flange and first rolling bearing
Groove；The output shaft, which is plugged into, is additionally provided with the adjust pad of annular between end and the jackshaft.
Preferably, the output shaft includes output shaft body, the second rolling bearing, institute are socketed with the output shaft body
It is double-row conical bearing to state the second rolling bearing.
Preferably, the drive pattern switching device further includes shell and oil seal seat；Second rolling bearing passes through institute
State oil seal seat and be fixed on the enclosure, the shell and the oil seal seat are equipped with lubricant passage way.
Preferably, the set that slidably engages includes the first internal spline and the second internal spline, the set that slidably engages passes through institute
State the first internal spline to engage with the jackshaft, the set that slidably engages is nibbled by second internal spline with the output shaft
Close；The modulus of first internal spline is 2 to 6, and the modulus of second internal spline is 2 to 6.
Preferably, the utility model also provides a kind of vehicle, which includes the drive pattern switching device.
The beneficial effects of the utility model are compared with the prior art：A kind of drive pattern provided by the utility model is cut
Changing device can be such that vehicle is travelled by tandem axle, and the power between tandem axle can also disconnected, according to operating mode that rear axle is total
Into lifting, vehicle list bridge driving traveling is realized.The device can enable the vehicle to more preferable according to operation optimization system of vehicle transmission efficiency
The various different road conditions of adaptation, and then improve fuel efficiency and save the purpose of fuel oil.The drive pattern switching device is pacified
Mounted in jackshaft output terminal, installation dimension is short, and cost is relatively low.
Brief description of the drawings
In order to illustrate more clearly of the technical solution in various embodiments of the utility model, institute in being described below to embodiment
Attached drawing to be used is needed to be briefly described.
Fig. 1 is differential lock assembly first state schematic diagram in the utility model embodiment 1；
Fig. 2 is the second view of differential lock assembly in the utility model embodiment 1；
Fig. 3 is the structure diagram of drive pattern switching device in the utility model embodiment 1；
Fig. 4 is jackshaft and output shaft attachment structure schematic diagram in the utility model embodiment 1；
Fig. 5 is differential lock assembly structure diagram in the utility model embodiment 2；
Fig. 6 is the structure diagram of differential lock assembly in the utility model embodiment 13.
Reference numeral：
Input shaft 10, jackshaft 20, jackshaft first end 201, jackshaft second end 202,203 first rolling bearing of flange
204th, differential lock assembly 30, the first housing 31, the first cavity 311, the second cavity 312, central cavity 313, spring retention cavity
314th, the 3rd cavity 315, the 3rd cavity blind end 316, baffle 317, spring 32, piston rod 33, piston 34, sealing ring 341, dial
Pitch the 35, first contact surface 351, the second contact surface 352, the 3rd contact surface 353, yoke bar 354, pressure switch 36, the second housing
37th, plunger end 38, slidably engage set 40, annular groove 41, output shaft 50, output shaft plug into end 501, output shaft body 502,
Adjust pad 503, the second rolling bearing 504, shell 60, oil seal seat 601.
Embodiment
Below in conjunction with attached drawing, and other technical characteristic above-mentioned to the utility model and advantage are described in more detail.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on orientation shown in the drawings
Or position relationship, description the utility model is for only for ease of, rather than the device or element of instruction or hint meaning must have
There is specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the utility model, " multiple " are meant that at least two, unless otherwise
It is clearly specific to limit.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or be electrically connected or can communicate each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, can be the interaction relationship of connection inside two elements or two elements, unless otherwise restricted clearly.For this
For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area
Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into
Row combines and combination.
Embodiment 1
As shown in Figure 1, it is differential lock assembly first state schematic diagram in the present embodiment；As shown in Fig. 2, in the present embodiment
The second view of differential lock assembly；As shown in figure 3, the structure diagram for drive pattern switching device in the present embodiment.
As shown in figure 4, it is jackshaft in the present embodiment and output shaft attachment structure schematic diagram.The one of the offer of the utility model embodiment 1
Kind drive pattern switching device, it includes：Input shaft 10, jackshaft 20, differential lock assembly 30, slidably engage set 40, output shaft
50 and shell 60.20 one end of jackshaft is connected by spline with input shaft 10, the other end with by spline and slidably engaging set 40
Connection.Input shaft 10 is connected with middle axle assembly, for making input shaft 10 link with middle axle assembly.Slidably engage set 40 and be equipped with the
One internal spline and the second internal spline, the first spline are meshed with jackshaft 20, and the second spline is meshed with output shaft 50.It is preferred that
, the modulus for slidably engaging the first internal spline on set 40 is 2 to 6, and the modulus for slidably engaging the second internal spline on set 40 is 2 to 6.
Slidably engage set 40 in a ring, annular groove 41 is additionally provided with its outer contour, annular groove 41 connects with differential lock assembly 30
Connect, can make to slidably engage set 40 along the slip of the axial direction of jackshaft 20 or output shaft 50 by differential lock assembly 30.Pass through
Slidably engaging set 40 can realize the engagement of jackshaft 20 and output shaft 50 with separating.Jackshaft 20, slidably engage set 40 and defeated
Shaft 50 is placed in inside shell 60.
Differential lock assembly 30 includes the first housing 31, elastic device, piston component, shift fork 35, sensor, the second housing 37
And power set.Power set and elastic device are connected with piston component, and the respectively forward and reverse fortune of piston component
It is dynamic that power is provided.Sensor is pressure switch 36 in the present embodiment.Piston component includes piston rod 33 and piston 34, piston rod 33
With 34 detachable connection of piston.Elastic device is preferably spring 32 in the present embodiment, and spring 32 and shift fork 35 are socketed in work
On stopper rod 33.Piston rod 33 is stepped, it is preferred that piston rod 33 is multidiameter structure.Shift fork 35 includes shift fork head and shift fork
Bar 354.Shift fork head includes the first contact surface 351, the second contact surface 352 and the 3rd contact surface 353.Shift fork headgear is connected on piston rod
On 33, shift fork head and piston rod 33 are coaxial.The second contact surface 352 and the multi-diameter shaft shaft shoulder of shift fork 35 offset, and the 3rd of shift fork 35 the
Contact surface 353 is connected with spring 32.Yoke bar 354 is located at the lower end of shift fork 35, and yoke bar 354 is inserted into annular groove 41, for band
The dynamic set 40 that slidably engages slides.Shift fork 35 is fixedly connected with slidably engaging set 40, and shift fork 35 slidably engages set 40 for locking, is dialled
Fork 35 is additionally operable to drive and slidably engages set 40 to slide axially.Piston 34 is connected with power set, power set in the present embodiment
For air pump or caisson.Second housing 37 is equipped with venthole, and venthole is connected with air pump or caisson.Second housing 37
It is detachably connected with the sealing of the first housing 31.
First housing 31 is internally provided with multiple cavities, it include the first cavity 311, the second cavity 312, central cavity 313,
314 and the 3rd cavity 315 of spring retention cavity.First cavity, 311 one end is penetrated through with central cavity 313, and the other end passes through second
Venthole on housing 37 is connected with air pump or caisson.First housing through-hole is set on the first housing 31, and the first housing leads to
Hole is internally formed the second cavity 312, and the second cavity 312 is penetrated through with central cavity 313, and is located at 313 top of central cavity, and second
Cavity 312 is used to house pressure switch 36.Pressure switch 36 is connected by the first housing through-hole with the first housing 31, pressure switch
36 are connected by the first housing through-hole with shift fork 35, and pressure switch 36 is used for the position for identifying shift fork 35.
Spring 32 is placed in inside spring retention cavity 314, and spring retention cavity 314 had both been used for the opposite position of fixed spring 32
Put, be additionally operable to the axial movement track of guide springs 32.Central cavity 313 is used to accommodate shift fork 35 and piston rod 33.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with the sealing ring for keeping air-tightness
341.Piston 34 can move back and forth in the first cavity 311.
Pressure switch 36 runs through the second cavity 312, and 36 contact of pressure switch is contacted with the first contact surface 351 on shift fork 35
Connection, pressure switch axis is arranged vertically with shift fork axle, with the contact surface 351 of pressure switch 36 is in inclined-plane on shift fork 35.Pressure is opened
The signal for the state that the effect of pass 36 is differential lock assembly 30 being presently in is input to driver's cabin, driver is understood currently
Differential lock assembly 30 state, and then driver is understood current drive pattern.
Plunger end 38 is placed in inside the 3rd cavity 315, and the 3rd cavity 315 had both been used for the phase of fixed piston rod tail end 38
To position, the axial movement track of guiding plunger end 38 is additionally operable to.Plunger end 38 is in 315 internal round-trip of the 3rd cavity
Movement, plunger end 38 can offset with the 3rd cavity blind end 316 during the motion, when the positive fortune of plunger end 38
Move to when offseting with the 3rd cavity blind end 316, plunger end 38 can only be static or continues under the action of elastic force anti-
To movement.Therefore, the position of the 3rd cavity blind end 316 had both determined the total length of the 3rd cavity 315, while also determined piston
The range of bar tail end 38.
Since the first cavity 311 is penetrated through with central cavity 313, if piston 34 departs from the first cavity 311 and enters center cavity
Body 313, piston 34 are influenced by gravity, and piston 34, which will be unable to reenter the first cavity 311, to move back and forth, and can cause difference
Fast 30 failure of lock assembly, to prevent piston 34 departs from the first cavity 311 from entering central cavity 313, therefore, plunger end 38
Range be not more than the first cavity 311 total length, i.e., when 38 positive movement of plunger end to the 3rd cavity close
When end 316 offsets, spring 32 is no longer compressed, and still inside the first cavity 311, its advantage is piston 34：It is living
Stopper rod tail end 38 combined with the first housing 31 to piston 34 formed position limiting structure, avoid piston 34 depart from the first cavity 311 and
Into central cavity 313, it also avoid spring 32 and damaged because pressure is excessive, reduce the failure rate of differential lock assembly 30, increase
The job stability of differential lock assembly 30 is added.
Since the contact jaw of pressure switch 36 is elastic extension structure, if 36 contact of pressure switch is in 35 positive movement of shift fork
During disengaged with the first contact surface 351, the contact jaw of pressure switch 36 can block the second contact surface 352, so as to cause
Pressure switch 36 hinders the counter motion of shift fork 35, makes 30 failure of differential lock assembly or damage pressure switch 36.It is other types of
Sensor similarly needs to avoid disengaging with the first contact surface 351, avoids data measurement deviation.To prevent pressure switch
36 contacts disengage during 35 positive movement of shift fork with the first contact surface 351, therefore, the maximum row of plunger end 38
No more than the distance between the second contact surface 352 and the 3rd contact surface 353, the range of plunger end 38 is not more than to be dialled journey
The axial range of axial length of the plug along shift fork axle, i.e. piston component is grown no more than shift fork head along the axial direction of shift fork axle
Degree.Its advantage is：Plunger end 38 is combined with the first housing 31 forms position limiting structure to shift fork 35, avoids pressure
Switch 36 contacts to disengage with the first contact surface 351 during 35 positive movement of shift fork, reduce differential lock assembly 30
Failure rate, adds the job stability of differential lock assembly 30.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in differential lock assembly first state, power
Device is not actuated, in the present embodiment i.e. air pump or caisson not by the venthole on the second housing 37 to the first cavity
Gas is pumped into 311.Piston 34 is contacted with the second housing 37, and 36 contact of pressure switch is contacted with the first contact surface 351, and pressure is opened
Close 36 contact positions and also proximate the 3rd contact surface 353, spring 32 has certain elastic force.
When air pump or caisson are pumped into gas into the first cavity 311,34 both ends air pressure of piston is unbalanced, gas pressure
Push piston 34 and do positive movement, piston rod 33 drives shift fork 35 to do positive movement vertically, shift fork 35 and then to spring 32
Be compressed, meanwhile, plunger end 38 in 315 inside positive movement of the 3rd cavity, when 38 positive movement of plunger end extremely
When offseting with the 3rd cavity blind end 316, piston rod 33, piston 34 and shift fork 35 are limited, and positive movement stops, at this time differential
Lock assembly 30 enters the second state of differential lock assembly.When differential lock assembly 30 is in the second state of differential lock assembly, piston 34
In the position away from the second housing 37, spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351,
36 contact position of pressure switch also proximates the second contact surface 352.When venthole on by the second housing 37 is outwards vented, quilt
The spring 32 of compression promotes shift fork 35 to carry out counter motion, and shift fork 35 is carried out reversely vertically by piston rod 33 with piston 34
Movement, until after piston 34 is contacted with the second housing 37, counter motion stops, and it is total to switch to differential lock for differential lock assembly 30 at this time
Into first state.By the reciprocal switching of differential lock assembly first state and the second state of differential lock assembly, i.e., so that yoke bar
354 drives slidably engage set 40 and are slided.First contact surface 351 diverse location to the pressure of 36 contact of pressure switch not
Together, therefore, the position of shift fork 35 can be identified by pressure switch 36.First housing 31 is connected with shell 60, and center cavity
Body 313 and the inside of shell 60 connect, for providing the space of movement for yoke bar 354.
Sensor matches with the shift fork 35 comprising inclined-plane in the present embodiment, sensor by judge the position of shift fork 35 come
Identification slidably engages the position of set 40, and its advantage is that ramp effect of the sensor directly with shift fork 35, shortens detection
Distance, improves the precision of position identification；Meanwhile enhance the job stability of differential lock assembly sensor and using the longevity
Life, is in addition also avoided that the problem that pressure switch stroke is inadequate.
Jackshaft 20 includes jackshaft first end 201 and jackshaft second end 202, and jackshaft first end 201 passes through spline
Input shaft 10 connects, and jackshaft second end 202 is equipped with external splines, and 202 external splines of jackshaft second end is with slidably engaging set 40
First internal spline is meshed.Flange 203 is additionally provided with jackshaft second end 202, the first rolling bearing is also socketed on flange 203
204, the first rolling bearing 204 is preferably needle bearing.
Output shaft 50 is plugged into including output shaft holds 501 and output shaft body 502, and output shaft, which is plugged into, holds 501 to be equipped with outer flower
Key, the external splines that output shaft is plugged on end 501 are meshed with slidably engaging the second internal spline of set 40.Output shaft is plugged into end 501
The adjust pad 503 of annular is additionally provided between jackshaft second end 202, the beneficial effect of adjust pad 503 is to provide slow
Punching acts on, and reduces the frictional dissipation that output shaft is plugged between end 501 and jackshaft second end 202, and add device uses the longevity
Life.Output shaft, which is plugged into, holds 501 grooves being internally provided with for accommodating 203 and first rolling bearing 204 of flange.Export shaft body
The second rolling bearing 504 is socketed on 502, the second rolling bearing 504 is preferably double-row conical bearing.Second rolling bearing
504 are also fixed on inside shell 60 by oil seal seat 601.The rigidity of double-row conical bearing is strong, and large carrying capacity is loaded
Deformation quantity is few afterwards, therefore suitably output shaft is supported.But since the amount loaded of double-row conical bearing is larger and rolls
Quantum count is larger, then double-row conical bearing needs good lubricant environment, therefore is equipped with shell 60 and oil seal seat 601
Lubricant passage way, for providing lubricating oil for the second rolling bearing 504.Output shaft 50 is also connected with rear axle assy, for rear axle
Transmission.
A kind of operation principle of drive pattern switching device provided in this embodiment is：
When vehicle needs tandem axle to both participate in power output when overloaded, differential lock assembly 30 is in differential lock assembly at this time
First state, the position of shift fork 35 make to slidably engage set 40 and keep slidably engaging to cover first position, that is, slidably engage the difference of set 40
Engaged at the same time with jackshaft 20 and output shaft 50.Jackshaft 20 links with output shaft 50, and vehicle power path is followed successively by, and is started
Machine, gearbox, middle axle assembly, input shaft 10, jackshaft 20, output shaft 50 and rear axle assy, i.e., by the engine power same time-division
Axle assembly and rear axle assy in dispensing.
When being changed into vehicle underloading or zero load, to reduce vehicle oil consumption and running cost, and lifting system of vehicle transmission efficiency,
Need to realize that vehicle is changed into single drive axle traveling from tandem axle traveling, its transition regime is：Pass through differential lock assembly power
The driving of device, the state of differential lock assembly 30 is changed to the second state of differential lock assembly by differential lock assembly first state,
The drive of yoke bar 354 at the same time slidably engages set 40 and slides axially, and slidably engages the set second place to reach, slidably engages set second
Position is to slidably engage set 40 to depart from the position being connected with jackshaft 20, and the set second place is slidably engaged when slidably engaging to cover to be located at
When, slidably engage the end of only plugging into yoke bar 354 and output shaft of set 40 and 501 be connected.Jackshaft 20 at this time can not be with output shaft
50 linkages, jackshaft 20 perform idle running, are disconnected to the power of rear axle assy transmission.Vehicle power path is followed successively by, engine, change
Fast case, middle axle assembly, input shaft 10 and jackshaft 20, i.e., be only assigned to middle axle assembly by engine power.Pressure switch 36 is logical
Cross and judge that the position of shift fork 35 travels to identify that vehicle travels still tandem axle for single drive axle.
Vehicle switches to single drive axle traveling, total with rear axle although rear axle assy is not involved in the output of power at this time
Vehicle tyre into connection is still contacted with ground, and oil consumption is also increased while adding unnecessary friction.Therefore rear
While axle assembly power interruption or after interruption, rear axle assy is lifted, and then make the vehicle tyre being connected with rear axle assy
Depart from ground, can further reduce the oil consumption of vehicle.
In addition, when slidably engage set 40 from slidably engage set the second place return to slidably engage set first position process
In, if jackshaft 20 can not keep coaxial state with output shaft 50, slidably engage set 40 and will be unable to nibble with jackshaft 20 again
Close, vehicle can only single drive axle traveling, can not be switched to tandem axle traveling, will also cause jackshaft second end 202 and slide
The mechanical injuries of engaging sleeve 40, to overcome the technical problem, the present embodiment is inserted into output shaft using flange 203 and plugs into end 501
Connection structure, it is beneficial in that：No matter slidably engage set 40 and be in slidably engage and cover first position or slidably engage
The second place is covered, which can guarantee that jackshaft 20 keeps coaxial state with output shaft 50, it is ensured that in the present embodiment
The job stability of switching device is driven, reduces failure rate.
The present embodiment additionally provides a kind of vehicle for including middle axle assembly, drive pattern switching device and rear axle assy, should
Vehicle can switch the quantity for the drive axle for participating in power output according to load condition, moreover it is possible to by sensor by vehicle traction mould
Formula feeds back to driver.
Embodiment 2
The present embodiment in place of the difference of embodiment 1 with being：It is as shown in figure 5, total for differential lock in utility model embodiment 2
Into structure diagram；First cavity, 311 one end is connected with central cavity 313, and the other end passes through the venthole on the second housing 37
Connected with air pump or caisson.First cavity 311 and the junction of central cavity 313 are equipped with baffle 317.Plunger end 38
Moved in 315 internal round-trip of the 3rd cavity, plunger end 38 during the motion can not be with 316 phase of the 3rd cavity blind end
Support.Piston 34 can offset in positive movement with baffle 317, can offset when piston 34 is in positive movement with baffle 317
When, piston 34 can only be static or continues counter motion under the action of elastic force.Therefore, the position of baffle 317 determines work
The range of plug 34.
Since the first cavity 311 is connected with central cavity 313, if piston 34 departs from the first cavity 311 and enters center cavity
Body 313, piston 34 are influenced by gravity, and piston 34, which will be unable to reenter the first cavity 311, to move back and forth, and can cause difference
Fast 30 failure of lock assembly, therefore, the setting of baffle 317 can prevent piston 34 from departing from the first cavity 311 and entering central cavity
313, i.e., when piston 34 and baffle 317 offset, spring 32 is no longer compressed, and piston 34 is still inside the first cavity 311.
So that the axial range of piston component is not more than the total length of the first cavity 311.The beneficial effect of baffle 317 is set to exist
In：Baffle 317 forms position limiting structure to piston 34, avoids piston 34 and departs from the first cavity 311 and enter central cavity 313,
It it also avoid spring 32 to damage because pressure is excessive, reduce the failure rate of differential lock assembly 30, add differential lock assembly 30
Job stability.
Since the contact jaw of pressure switch 36 is elastic extension structure, if 36 contact of pressure switch is in 35 positive movement of shift fork
During disengaged with the first contact surface 351, the contact jaw of pressure switch 36 can block the second contact surface 352, so as to cause
Pressure switch 36 hinders the counter motion of shift fork 35, makes 30 failure of differential lock assembly or damage pressure switch 36.It is other types of
Sensor similarly needs to avoid disengaging with the first contact surface 351, avoids data measurement deviation.To prevent pressure switch
36 contacts are disengaged, it is necessary to make the range of piston 34 not during 35 positive movement of shift fork with the first contact surface 351
More than the distance between the second contact surface 352 and the 3rd contact surface 353, the range of piston 34 is not more than shift fork head along shift fork
The axial range of the axial length of axis, i.e. piston component is not more than axial length of the shift fork head along shift fork axle.It is beneficial to effect
Fruit is：Baffle 317 forms position limiting structure to shift fork 35 indirectly, avoids 36 contact of pressure switch in 35 positive movement mistake of shift fork
Disengaged in journey with the first contact surface 351, reduce the failure rate of differential lock assembly 30, add the work of differential lock assembly 30
Make stability.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in the differential lock assembly third state, power
Device is not actuated, in the present embodiment i.e. air pump or caisson not by the venthole on the second housing 37 to the first cavity
Gas is pumped into 311, piston 34 is contacted with the second housing 37, and 36 contact of pressure switch is contacted with the first contact surface 351, and pressure is opened
Close 36 contact positions and also proximate the 3rd contact surface 353, spring 32 has certain elastic force.When air pump or caisson are to the first chamber
When being pumped into gas in body 311,34 both ends air pressure of piston is unbalanced, and gas pressure promotes piston 34 to do positive movement, piston rod 33
Drive shift fork 35 to do positive movement vertically, shift fork 35 and then spring 32 be compressed, when 34 positive movement of piston to gear
When plate 317 offsets, piston rod 33 and shift fork 35 are limited, and positive movement stops, and it is total to enter differential lock for differential lock assembly 30 at this time
Into the 4th state.
When differential lock assembly 30 is in four state of differential lock assembly, piston 34 is in the position away from the second housing 37
Put, piston 34 offsets with baffle 317, and spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351, pressure
Power switchs 36 contact positions and also proximates the second contact surface 352.
When venthole on by the second housing 37 is outwards vented, the spring 32 compressed promotes shift fork 35 to carry out reversely
Movement, shift fork 35 carry out counter motion vertically by piston rod 33 with piston 34, until piston 34 connects with the second housing 37
After touch, counter motion stops, and differential lock assembly 30 switches to the differential lock assembly third state at this time.Pass through differential lock assembly the 3rd
The reciprocal switching of state and the 4th state of differential lock assembly, that is, cause the drive of yoke bar 354 to slidably engage set 40 and slided.
A kind of operation principle of drive pattern switching device provided in this embodiment is：
When vehicle needs tandem axle to both participate in power output when overloaded, differential lock assembly 30 is in differential lock assembly at this time
The third state, the position of shift fork 35 make to slidably engage set 40 and keep slidably engaging to cover first position, that is, slidably engage the difference of set 40
Engaged at the same time with jackshaft 20 and output shaft 50.Jackshaft 20 links with output shaft 50, and vehicle power path is followed successively by, and is started
Machine, gearbox, middle axle assembly, input shaft 10, jackshaft 20, output shaft 50 and rear axle assy, i.e., by the engine power same time-division
Axle assembly and rear axle assy in dispensing.
When being changed into vehicle underloading or zero load, to reduce vehicle oil consumption and running cost, and lifting system of vehicle transmission efficiency,
Need to realize that vehicle is changed into single drive axle traveling from tandem axle traveling, its transition regime is：Pass through differential lock assembly power
The driving of device, the state of differential lock assembly 30 is changed to the 4th state of differential lock assembly by the differential lock assembly third state,
The drive of yoke bar 354 at the same time slidably engages set 40 and slides axially, and slidably engages the set second place to reach, slidably engages set second
Position is to slidably engage set 40 to depart from the position being connected with jackshaft 20, and the set second place is slidably engaged when slidably engaging to cover to be located at
When, slidably engage the end of only plugging into yoke bar 354 and output shaft of set 40 and 501 be connected.Jackshaft 20 at this time can not be with output shaft
50 linkages, jackshaft 20 perform idle running, are disconnected to the power of rear axle assy transmission.Vehicle power path is followed successively by, engine, change
Fast case, middle axle assembly, input shaft 10 and jackshaft 20, i.e., be only assigned to middle axle assembly by engine power.Vehicle switches to list
Drive axle travels, although rear axle assy is not involved in the output of power at this time, the vehicle tyre being connected with rear axle assy is still
Contacted with ground, oil consumption is also increased while adding unnecessary friction.Therefore while rear axle assy power interruption
Or after interrupting, rear axle assy is lifted, and then the vehicle tyre for making to be connected with rear axle assy departs from ground, can further subtract
The oil consumption of few vehicle.
Embodiment 3
The present embodiment is with the difference part of embodiment 1：Piston 34 is connected with power set, power set in the present embodiment
For electromagnet.Piston 34 is equipped with permanent magnet, and the second housing 37 is equipped with electromagnet, when the solenoid is energized, produces magnetic field, magnetic
Push 34 positive movement of piston.When electromagnet powers off, magnetic field disappears.
First housing 31 is internally provided with multiple cavities, it include the first cavity 311, the second cavity 312, central cavity 313,
314 and the 3rd cavity 315 of spring retention cavity.First cavity, 311 one end is penetrated through with central cavity 313, the other end and second shell
Body 37 connects.First housing through-hole is set on the first housing 31, and the first housing through-hole is internally formed the second cavity 312.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with sealing ring 341.Due to the present embodiment
In need not ensure air-tightness, therefore, annular groove and sealing ring 341 on piston 34 can be not provided with.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in differential lock assembly first state, power
Device is not actuated, and in the present embodiment i.e. under electromagnet powering-off state, piston 34 is contacted with the second housing 37, and pressure switch 36 is touched
Point is contacted with the first contact surface 351, and 36 contact position of pressure switch also proximates the 3rd contact surface 353, and spring 32 has certain
Elastic force.
When the solenoid is energized, electromagnet produces electromagnetic field, and electromagnetic field effect exists in the permanent magnet on piston 34, piston 34
Do positive movement under magneticaction, piston rod 33 drives shift fork 35 to do positive movement vertically, shift fork 35 so to spring 32 into
Row compression, meanwhile, plunger end 38 in 315 inside positive movement of the 3rd cavity, when 38 positive movement of plunger end to
When 3rd cavity blind end 316 offsets, piston rod 33, piston 34 and shift fork 35 are limited, and positive movement stops, at this time differential lock
Assembly 30 enters the second state of differential lock assembly.
When differential lock assembly 30 is in the second state of differential lock assembly, piston 34 is in the position away from the second housing 37
Put, spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351, and 36 contact position of pressure switch also leans on
Nearly second contact surface 352.
After electromagnet powers off, the spring 32 compressed promotes shift fork 35 to carry out counter motion, and shift fork 35 passes through piston rod
33 band pistons 34 carry out counter motion vertically, until after piston 34 is contacted with the second housing 37, counter motion stops, at this time
Differential lock assembly 30 switches to differential lock assembly first state.Pass through differential lock assembly first state and the second shape of differential lock assembly
The reciprocal switching of state, that is, cause the drive of yoke bar 354 to slidably engage set 40 and slided.
The beneficial effect that permanent magnet matches is equipped with using electromagnet as power set with piston 34 to be：It is easy to dynamic
Power apparatus is controlled, simple in structure, convenient maintenance.
Embodiment 4
The present embodiment is with the difference part of embodiment 2：Piston 34 is connected with power set, power set in the present embodiment
For electromagnet.Piston 34 is equipped with permanent magnet, and the second housing 37 is equipped with electromagnet, when the solenoid is energized, produces magnetic field, magnetic
Push 34 positive movement of piston.When electromagnet powers off, magnetic field disappears.
First housing 31 is internally provided with multiple cavities, it include the first cavity 311, the second cavity 312, central cavity 313,
314 and the 3rd cavity 315 of spring retention cavity.First cavity, 311 one end is connected with central cavity 313, the other end and second shell
Body 37 connects.First housing through-hole is set on the first housing 31, and the first housing through-hole is internally formed the second cavity 312.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with sealing ring 341.Due to the present embodiment
In need not ensure air-tightness, therefore, annular groove and sealing ring 341 on piston 34 can be not provided with.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in the differential lock assembly third state, power
Device is not actuated, and in the present embodiment i.e. under electromagnet powering-off state, piston 34 is contacted with the second housing 37, and pressure switch 36 is touched
Point is contacted with the first contact surface 351, and 36 contact position of pressure switch also proximates the 3rd contact surface 353, and spring 32 has certain
Elastic force.
When the solenoid is energized, electromagnet produces electromagnetic field, and electromagnetic field effect exists in the permanent magnet on piston 34, piston 34
Do positive movement under magneticaction, piston rod 33 drives shift fork 35 to do positive movement vertically, shift fork 35 so to spring 32 into
Row compression, when 34 positive movement of piston with baffle 317 to when offseting, piston rod 33 and shift fork 35 are limited, and positive movement stops,
Differential lock assembly 30 enters the 4th state of differential lock assembly at this time.
When differential lock assembly 30 is in four state of differential lock assembly, piston 34 is in the position away from the second housing 37
Put, piston 34 offsets with baffle 317, and spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351, pressure
Power switchs 36 contact positions and also proximates the second contact surface 352.
After electromagnet powers off, the spring 32 compressed promotes shift fork 35 to carry out counter motion, and shift fork 35 passes through piston rod
33 band pistons 34 carry out counter motion vertically, until after piston 34 is contacted with the second housing 37, counter motion stops, at this time
Differential lock assembly 30 switches to the differential lock assembly third state.Pass through the differential lock assembly third state and the 4th shape of differential lock assembly
The reciprocal switching of state, that is, cause the drive of yoke bar 354 to slidably engage set 40 and slided.
The beneficial effect that permanent magnet matches is equipped with using electromagnet as power set with piston 34 to be：It is easy to dynamic
Power apparatus is controlled, simple in structure, convenient maintenance.
Embodiment 5
The present embodiment is with the difference part of embodiment 1：Piston 34 is connected with power set, power set in the present embodiment
For hydraulic device or motor.Hydraulic device or motor are connected through the second housing 37 with 34 interference of piston.When hydraulic device or electricity
When machine starts, 34 positive movement of hydraulic device or motor pushing piston.
First housing 31 is internally provided with multiple cavities, it include the first cavity 311, the second cavity 312, central cavity 313,
314 and the 3rd cavity 315 of spring retention cavity.First cavity, 311 one end is penetrated through with central cavity 313, the other end and second shell
Body 37 connects.First housing through-hole is set on the first housing 31, and the first housing through-hole is internally formed the second cavity 312.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with sealing ring 341.Due to the present embodiment
In need not ensure air-tightness, therefore, annular groove and sealing ring 341 on piston 34 can be not provided with.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in differential lock assembly first state, power
Device is not actuated, in the case that i.e. hydraulic device or motor do not export power in the present embodiment, 34 and second housing 37 of piston
Contact, 36 contact of pressure switch are contacted with the first contact surface 351, and 36 contact position of pressure switch also proximates the 3rd contact surface 353,
Spring 32 has certain elastic force.
When hydraulic device or motor output power, piston 34 does positive movement under thrust, and piston rod 33 drives
Shift fork 35 does positive movement vertically, shift fork 35 and then spring 32 is compressed, meanwhile, plunger end 38 is in the 3rd cavity
315 inside positive movements, when 38 positive movement of plunger end with the 3rd cavity blind end 316 to when offseting, piston rod 33, live
Plug 34 and shift fork 35 are limited, and positive movement stops, and differential lock assembly 30 enters the second state of differential lock assembly at this time.
When differential lock assembly 30 is in the second state of differential lock assembly, piston 34 is in the position away from the second housing 37
Put, spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351, and 36 contact position of pressure switch also leans on
Nearly second contact surface 352.
After hydraulic device or motor stop output power, the spring 32 compressed promotes shift fork 35 to carry out counter motion,
Shift fork 35 carries out counter motion vertically by piston rod 33 with piston 34, until after piston 34 is contacted with the second housing 37,
Counter motion stops, and differential lock assembly 30 switches to differential lock assembly first state at this time.Pass through differential lock assembly first state
With the reciprocal switching of the second state of differential lock assembly, that is, the drive of yoke bar 354 is caused to slidably engage set 40 and slided.
Embodiment 6
The present embodiment is with the difference part of embodiment 2：Piston 34 is connected with power set, power set in the present embodiment
For hydraulic device or motor.Hydraulic device or motor are connected through the second housing 37 with 34 interference of piston.When hydraulic device or electricity
When machine starts, 34 positive movement of hydraulic device or motor pushing piston.
First housing 31 is internally provided with multiple cavities, it include the first cavity 311, the second cavity 312, central cavity 313,
314 and the 3rd cavity 315 of spring retention cavity.First cavity, 311 one end is connected with central cavity 313, the other end and second shell
Body 37 connects.First housing through-hole is set on the first housing 31, and the first housing through-hole is internally formed the second cavity 312.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with sealing ring 341.Due to the present embodiment
In need not ensure air-tightness, therefore, annular groove and sealing ring 341 on piston 34 can be not provided with.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in the differential lock assembly third state, power
Device is not actuated, in the case that i.e. hydraulic device or motor do not export power in the present embodiment, 34 and second housing 37 of piston
Contact, 36 contact of pressure switch are contacted with the first contact surface 351, and 36 contact position of pressure switch also proximates the 3rd contact surface 353,
Spring 32 has certain elastic force.
When hydraulic device or motor output power, piston 34 does positive movement under thrust, and piston rod 33 drives
Shift fork 35 does positive movement vertically, shift fork 35 and then spring 32 is compressed, when 34 positive movement of piston to baffle 317
When offseting, piston rod 33 and shift fork 35 are limited, and positive movement stops, and differential lock assembly 30 enters differential lock assembly the 4th at this time
State.
When differential lock assembly 30 is in four state of differential lock assembly, piston 34 is in the position away from the second housing 37
Put, piston 34 offsets with baffle 317, and spring 32 is contacted by maximum compression, 36 contact of pressure switch with the first contact surface 351, pressure
Power switchs 36 contact positions and also proximates the second contact surface 352.
After hydraulic device or motor stop output power, the spring 32 compressed promotes shift fork 35 to carry out counter motion,
Shift fork 35 carries out counter motion vertically by piston rod 33 with piston 34, until after piston 34 is contacted with the second housing 37,
Counter motion stops, and differential lock assembly 30 switches to the differential lock assembly third state at this time.Pass through the differential lock assembly third state
With the reciprocal switching of the 4th state of differential lock assembly, that is, the drive of yoke bar 354 is caused to slidably engage set 40 and slided.
Embodiment 7
The present embodiment is with the difference part of embodiment 1：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 1, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 1, real
Apply the light contact position that 36 contact position of pressure switch in example 1 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 8
The present embodiment is with the difference part of embodiment 2：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 2, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 2, real
Apply the light contact position that 36 contact position of pressure switch in example 2 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 9
The present embodiment is with the difference part of embodiment 3：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 3, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 3, real
Apply the light contact position that 36 contact position of pressure switch in example 3 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 10
The present embodiment is with the difference part of embodiment 4：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 4, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 4, real
Apply the light contact position that 36 contact position of pressure switch in example 4 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 11
The present embodiment is with the difference part of embodiment 5：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 5, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 5, real
Apply the light contact position that 36 contact position of pressure switch in example 5 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 12
The present embodiment is with the difference part of embodiment 6：Sensor in differential assembly 30 is preferably that laser ranging passes
Sensor, i.e., using the pressure sensor 36 in laser range sensor alternate embodiment 6, laser range sensor is still placed in second
Inside cavity 312,36 contact of pressure sensor is changed into the light contact of laser range sensor in the present embodiment in embodiment 6, real
Apply the light contact position that 36 contact position of pressure switch in example 6 is changed into laser range sensor in the present embodiment.
Since the first contact surface 351 is in inclined-plane, during 35 positive movement of shift fork or counter motion, Laser Measuring
Light contact position away from sensor and the first contact surface 351 can change, the distance hair of light contact and laser range sensor
It is raw to change, by reading the distance between laser range sensor and light contact, it can identify the location of shift fork 35.
Embodiment 13
As shown in fig. 6, the structure diagram for differential lock assembly in the present embodiment.Differential lock assembly 30 includes the first housing
31st, elastic device, piston component, shift fork 35, sensor, the second housing 37 and power set.Power set and elastic device are equal
It is connected with piston component, and the forward and reverse movement of respectively piston component provides power.Sensor is pressure in the present embodiment
Power switch 36.Piston component includes piston rod 33 and piston 34, piston rod 33 and 34 detachable connection of piston.In the present embodiment
Elastic device is preferably spring 32, and spring 32 and shift fork 35 are socketed on piston rod 33.Piston rod 33 is stepped, preferably
, piston rod 33 is multidiameter structure.Shift fork 35 includes shift fork head and yoke bar 354.Shift fork headgear is connected on piston rod 33, is dialled
Plug and piston rod 33 are coaxial.
Shift fork head includes the first contact surface 351, the second contact surface 352 and the 3rd contact surface 353.Second contact of shift fork 35
Face 352 offsets with the multi-diameter shaft shaft shoulder, and the 3rd contact surface 353 of shift fork 35 is connected with spring 32.Yoke bar 354 is located at shift fork 35
Lower end, yoke bar 354 are inserted into annular groove 41, and the slip of set 40 is slidably engaged for driving.Shift fork 35 is fixed with slidably engaging set 40
Connection, shift fork 35 are used for locking and slidably engage set 40, and shift fork 35 is additionally operable to drive and slidably engages cover 40 and slide axially.Piston 34
It is connected with power set, power set are air pump or caisson in the present embodiment.Second housing 37 is equipped with venthole, ventilation
Hole is connected with air pump or caisson.Second housing 37 is detachably connected with the sealing of the first housing 31.
First housing 31 is internally provided with multiple cavities, it includes the first cavity 311, the second cavity 312, central cavity 313
With spring retention cavity 314.First cavity, 311 one end is penetrated through with central cavity 313, and the other end passes through logical on the second housing 37
Stomata is connected with air pump or caisson.First housing through-hole is set on the first housing 31, second is formed in the first housing through-hole
Cavity 312, the second cavity 312 are penetrated through with central cavity 313, and the second cavity 312 is used to house pressure switch 36.Pressure switch 36
It is connected by the first housing through-hole with the first housing 31, pressure switch 36 is connected by the first housing through-hole with piston rod 33, pressure
Power switch 36 is used for the position for identifying piston rod 33.
Spring 32 is placed in inside spring retention cavity 314, and spring retention cavity 314 had both been used for the opposite position of fixed spring 32
Put, be additionally operable to the axial movement track of guide springs 32.Central cavity 313 is used to accommodate shift fork 35 and piston rod 33.Piston 34
It is built in the first cavity 311, piston 34 is equipped with annular groove, and annular groove is built-in with the sealing ring for keeping air-tightness
341.Piston 34 can move back and forth in the first cavity 313.
Pressure switch 36 runs through the second cavity 312, and 36 contact of pressure switch is connected with piston rod 33,36 contact of pressure switch
Offset with plunger end 38.The effect of pressure switch 36 is the signal input for the state for being presently in differential lock assembly 30
To driver's cabin, driver is set to understand the state of current differential lock assembly 30, and then driver is understood current drive pattern.
Plunger end 38 is placed in inside the second cavity 312, and the second cavity 312 had both been used for the phase of fixed piston rod tail end 38
To position, the axial movement track of guiding plunger end 38 is additionally operable to.Plunger end 38 is in 312 internal round-trip of the second cavity
Movement.
The operation principle of differential lock assembly 30 is：When differential lock assembly 30 is in five state of differential lock assembly, power
Device is not actuated, in the present embodiment i.e. air pump or caisson not by the venthole on the second housing 37 to the first cavity
Gas is pumped into 311.Piston 34 is contacted with the second housing 37, and 36 contact of pressure switch is contacted with plunger end 38, spring 32
With certain elastic force.
When air pump or caisson are pumped into gas into the first cavity 311,34 both ends air pressure of piston is unbalanced, gas pressure
Push piston 34 and do positive movement, piston rod 33 drives shift fork 35 to do positive movement vertically, shift fork 35 and then to spring 32
It is compressed, meanwhile, plunger end 38 is promoted in 312 inside positive movement of the second cavity, 38 positive movement of plunger end
Pressure switch 36, makes the pressure value of 36 contact jaw of pressure switch change, when piston rod 33 and piston 34 move to its forward direction
Maximum stroke is moved, differential lock assembly 30 enters the 6th state of differential lock assembly at this time.When differential lock assembly 30 is in differential
During six state of lock assembly, piston 34 is in the position away from the second housing 37, and spring 32 is by maximum compression, piston rod 33 and work
Plug 34 moves to its positive movement maximum stroke.
When venthole on by the second housing 37 is outwards vented, the spring 32 compressed promotes shift fork 35 to carry out reversely
Movement, shift fork 35 carry out counter motion vertically by piston rod 33 with piston 34, until piston 34 connects with the second housing 37
After touch, counter motion stops, and differential lock assembly 30 switches to the 5th state of differential lock assembly at this time.Pass through differential lock assembly the 5th
The reciprocal switching of state and the 6th state of differential lock assembly, that is, cause the drive of yoke bar 354 to slidably engage set 40 and slided.It is living
Stopper rod tail end 38 is different to the pressure of 36 contact of pressure switch in diverse location, therefore, work can be identified by pressure switch 36
The position of stopper rod 33, and then identify shift fork 35 and slidably engage the position of set 40.First housing 31 is connected with shell 60, and in
Chambers of the heart body 313 and the inside of shell 60 connect, for providing the space of movement for yoke bar 354.
Sensor is arranged on the first housing 31 in the present embodiment, and the thickness of the first housing 31 is less than the thickness of the second housing 37
Degree, had both avoided the problem of 36 stroke stroke of pressure switch is inadequate, and had also increased the accuracy of detection of 36 pressure value of pressure switch.Together
When, enhance the job stability and service life of differential lock assembly sensor.
The present embodiment additionally provides a kind of vehicle for including differential lock assembly 30, which further includes middle axle assembly, driving
The vehicle of mode-changeover device and rear axle assy, differential lock assembly 30 are used for the quantity for switching the drive axle of power output, moreover it is possible to
Vehicle driving patterns are fed back to by driver by sensor.
It these are only the preferred embodiment of the utility model, be merely illustrative for the utility model, rather than limit
Property processed.Those skilled in the art understands, it can be carried out in the spirit and scope that the utility model claims are limited
Many changes, modification, in addition it is equivalent, but fall within the scope of protection of the utility model.
Claims (10)
1. a kind of drive pattern switching device, it is characterised in that it includes：Differential lock assembly, jackshaft, slidably engage set and it is defeated
Shaft；The differential lock assembly slidably engages set connection with described, for driving the set that slidably engages to slide；The slip is nibbled
Trap is used to make the jackshaft and the output with the jackshaft and the output axis connection, the set that slidably engages respectively
Axis connection or disconnection；The differential lock assembly is equipped with the sensor for being used for that set position to be slidably engaged described in indirect identification.
2. drive pattern switching device as claimed in claim 1, it is characterised in that the differential lock assembly further includes first shell
Body, shift fork, sensor and piston component, first housing are equipped with the first housing through-hole, and the sensor passes through described
One housing through-hole is connected with first housing, and the sensor passes through first housing through-hole and the shift fork or the work
Plug assembly connects；Described shift fork one end is connected with the piston component, and the other end slidably engages set connection with described.
3. drive pattern switching device as claimed in claim 2, it is characterised in that the shift fork joins with the piston component
It is dynamic；The sensor is connected with the shift fork, and the contact surface of the shift fork and the sensor is in inclined-plane, and the sensor is pressure
Power switchs or laser range sensor.
4. drive pattern switching device as claimed in claim 2 or claim 3, it is characterised in that the differential lock assembly further includes dynamic
Power apparatus and elastic device, the power set and the elastic device are connected with the piston component, and are respectively described
The forward and reverse movement of piston component provides power.
5. drive pattern switching device as claimed in claim 4, it is characterised in that the power set fill for air pump or gas storage
Put or hydraulic device or motor or electromagnet.
6. the drive pattern switching device as described in claim 1 or 2 or 3 or 5, it is characterised in that also set on the jackshaft
There is flange, the first rolling bearing is socketed on the flange；The output shaft is plugged into end including output shaft, and the output shaft is plugged into end
It is equipped with the groove for being used for accommodating the flange and first rolling bearing；The output shaft plug into end with the jackshaft it
Between be additionally provided with annular adjust pad.
7. the drive pattern switching device as described in claim 1 or 2 or 3 or 5, it is characterised in that the output shaft includes defeated
Go out shaft body, be socketed with the second rolling bearing in the output shaft body, second rolling bearing is double-row conical axis
Hold.
8. drive pattern switching device as claimed in claim 7, it is characterised in that the drive pattern switching device further includes
Shell and oil seal seat；Second rolling bearing is fixed on the enclosure by the oil seal seat, the shell and described
Oil seal seat is equipped with lubricant passage way.
9. the drive pattern switching device as described in claim 1 or 2 or 3 or 5, it is characterised in that described to slidably engage set bag
The first internal spline and the second internal spline are included, the set that slidably engages is engaged by first internal spline with the jackshaft, institute
State to slidably engage to cover and engaged by second internal spline with the output shaft；The modulus of first internal spline is 2 to 6,
The modulus of second internal spline is 2 to 6.
10. a kind of vehicle, it is characterised in that including the drive pattern switching device as described in claim 1-9 is any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721294078.4U CN207257657U (en) | 2017-10-10 | 2017-10-10 | A kind of drive pattern switching device and the vehicle with the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721294078.4U CN207257657U (en) | 2017-10-10 | 2017-10-10 | A kind of drive pattern switching device and the vehicle with the device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207257657U true CN207257657U (en) | 2018-04-20 |
Family
ID=61916901
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721294078.4U Expired - Fee Related CN207257657U (en) | 2017-10-10 | 2017-10-10 | A kind of drive pattern switching device and the vehicle with the device |
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| Country | Link |
|---|---|
| CN (1) | CN207257657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112319478A (en) * | 2019-07-31 | 2021-02-05 | 比亚迪股份有限公司 | Vehicle driving mode switching method and device, storage medium and electric commercial vehicle |
-
2017
- 2017-10-10 CN CN201721294078.4U patent/CN207257657U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112319478A (en) * | 2019-07-31 | 2021-02-05 | 比亚迪股份有限公司 | Vehicle driving mode switching method and device, storage medium and electric commercial vehicle |
| CN112319478B (en) * | 2019-07-31 | 2022-04-15 | 比亚迪股份有限公司 | Vehicle driving mode switching method and device, storage medium and electric commercial vehicle |
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Granted publication date: 20180420 Termination date: 20181010 |