CN207701632U - A kind of pneumatic parking brake - Google Patents
A kind of pneumatic parking brake Download PDFInfo
- Publication number
- CN207701632U CN207701632U CN201721848280.7U CN201721848280U CN207701632U CN 207701632 U CN207701632 U CN 207701632U CN 201721848280 U CN201721848280 U CN 201721848280U CN 207701632 U CN207701632 U CN 207701632U
- Authority
- CN
- China
- Prior art keywords
- piston
- brake
- axle
- piston shell
- ring flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
The utility model belongs to engineering machinery field, and in particular to a kind of pneumatic parking brake, braked wheel is located on brake axle and brake axle can be moved axially along braked wheel；Detent housing and piston shell are fixed together, and the brake assemblies of limitation braked wheel rotation are equipped between detent housing and piston shell；Ring flange is fixed on brake axle on the end face on drag housing side；Spring base is fixed on piston shell, piston bush is on brake axle, and can be moved axially between piston shell and spring base, the brake spring group for pushing piston to be moved to ring flange side is set on spring base, piston shell is equipped with the air inlet for leading to axial gap between piston shell and piston；The outer end face of ring flange is equipped with the matched tooth form of axial end with vehicle bridge wheel side transmission shaft.It does not generate or generates between the friction plate of the utility model and compare less wear and heat, without cooling and lubrication；And due to being not directly placed on friction plate, the pressure for releasing braking is smaller, therefore use air source power, energy conservation and environmental protection.
Description
Technical field
The invention belongs to engineering machinery fields, and in particular to a kind of parking brake.
Background technology
Currently, parking brake majority is mounted between transmission case and drive axle, and used aloned；Pass through groups of springs
The power of generation, pressing friction piece realize parking braking；It is pressed into hydraulic oil in checking cylinder, pushes the further holddown spring of piston, makes
Have between friction plate gap can be with relative motion, to realize that parking releases, i.e. vehicle is during traveling, friction plate one
Directly there are relative motion, each friction plate in phase mutual friction, to will produce more heat always；So multi-purpose wet brake,
Brake installs sealing element, is lubricated and is cooled down to friction plate with gear oil, prevents friction plate from crossing thermal sintering；And wet brake
Friction coefficient is relatively low between friction plate, in order to there is enough parking torques, it is necessary to more multigroup friction plate and more multigroup
Spring；More friction plate will produce more heats, and the sealing element to brake heat dissipation and brake is all harmful；
The brake release pressure that more groups of springs need is bigger, in the case where piston ring area is certain, can only with hydraulic coupling come
Release parking braking；If be not tight seal, it may occur that oil leaking pollution environment.
Invention content
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide a kind of pneumatic parking brake.
The present invention is achieved through the following technical solutions：A kind of pneumatic parking brake, including ring flange, brake axle,
Braked wheel, detent housing, piston shell, piston and spring base, the braked wheel is located on brake axle and brake axle can be along
Braked wheel moves axially；The detent housing and piston shell is bolted, detent housing and braked wheel and piston shell
It is set with bearing between body and braked wheel, the braking group of limitation braked wheel axial rotation is equipped between detent housing and piston shell
Part；Ring flange is fixed on brake axle on the end face on drag housing side；The spring base is bolted on piston shell
On body, the piston bush can move axially on brake axle between piston shell and spring base, be set on spring base
There is the brake spring group for pushing piston to be moved to ring flange side, brake axle is equipped in close brake spring group side determines piston
The axle bumper of position, piston shell are equipped with the air inlet for leading to axial gap between piston shell and piston；The ring flange
Outer end face is equipped with the matched tooth form of axial end with vehicle bridge wheel side transmission shaft.
Further, the brake assemblies include friction plate group, clutch-plate group, brake pad and tripping spring group, described
Friction plate group be located in detent housing, the clutch-plate group is set on the brake wheel, and friction plate group and clutch-plate group are along axis
To arranged for interval, each tripping spring is located on piston shell in corresponding spring eye in the tripping spring group, braking
Groups of springs pushes brake pad to be pressed together friction plate group and clutch-plate group.
Further, the piston is boss structure, and the small end of boss is arranged facing towards ring flange, the piston
Two curved surfaces of shell and piston are in close contact, and sealing ring is equipped between piston shell and curved surface；Piston is close to ring flange side
End face sliding thrust washer is fixed with by positioning pin.
Further, the brake axle and braked wheel use spline fitted.
Further, the inner ring of the braked wheel is being smooth curved surface, the circle inside braked wheel far from ring flange side
Sliding curved surface is equipped with sliding bearing with braking between centers.
Further, the spring base is equipped with sliding bearing with braking between centers.
Further, the end face outside of the spring base is fixed with sensor holder, and sensor holder is equipped with for monitoring
The sensor of brake axle extreme sport position.
The parking brake of the present invention is mounted on vehicle bridge wheel side, and is to use in pairs, is often used 4,6 or 8,
Parking is safer.The present invention come the wheel side transmission shaft engagement of control flange disk and vehicle bridge and is taken off by piston and brake spring group
It opens, achieve the purpose that parking and releases parking, in the whole process, friction plate is without relative motion or has less relative motion,
It does not generate or generates and compare less wear and heat, without cooling and lubrication, therefore dry brake can be used.Dry brake rubs
Pad friction coefficient is larger, and friction plate group number used is fewer, and tripping spring group number can also be fewer.The present invention is not due to straight
It connects and acts on friction plate, brake spring group power is smaller, therefore releasing braking pressure used is also smaller, therefore can be used directly
Vehicle-mounted air source is as power, and power resources are convenient, and clean energy is not afraid of leakage, and pipeline is arranged well.
The beneficial effects of the invention are as follows：Without relative motion or there is less relative motion between the friction plate of the present invention, does not produce
Less wear and heat are compared in raw or generation, without cooling and lubrication；And the present invention is not directly placed on friction plate, brake spring group
Power is smaller, therefore releasing braking pressure used is also smaller, therefore uses vehicle-mounted air source as power, energy conservation and environmental protection.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structure chart of ring flange of the present invention；
In figure, 1, ring flange, 2, brake axle, 3, braked wheel, 4, detent housing, 5, friction plate group, 6, clutch-plate group, 7, system
Dynamic pad, 8, tripping spring group, 9, piston shell, 9-1, air inlet, 9-2, spring eye, 10, piston, 11, spring base, 12, sensing
Device seat, 13, sensor, 14, brake spring group, 15, positioning pin, 16, sliding thrust washer, 17, axial gap.
Specific implementation mode
Below according to drawings and examples, the present invention is further described.
As depicted in figs. 1 and 2, a kind of pneumatic parking brake, including ring flange 1, brake axle 2, braked wheel 3, drag housing
Body 4, piston shell 9, piston 10 and spring base 11, the braked wheel 3 is located on brake axle 2 and brake axle 2 can be along braking
3 axial movement of wheel；The detent housing 4 and piston shell 9 is bolted, detent housing 4 and braked wheel 3 and piston shell
Bearing is set between body 9 and braked wheel 3, the bearing between detent housing 4 and braked wheel 3 is by the 4 endoporus shaft shoulder of detent housing and system
The corresponding shaft shoulder limit of outer circle of driving wheel 3；Bearing between piston shell 9 and braked wheel 3 is by the 9 endoporus shaft shoulder of piston shell and braking
The corresponding shaft shoulder limit of outer circle of wheel 3；The braking group of limitation 3 axial rotation of braked wheel is equipped between detent housing 4 and piston shell 9
Part；Ring flange 1 is fixed on brake axle 2 on the end face of 4 side of detent housing；The spring base 11 is bolted on work
It fills on shell 9, the piston 10 is sleeved on brake axle 2, and can be moved axially between piston shell 9 and spring base 11,
Be set on spring base 11 and push the brake spring group 14 that is moved to 1 side of ring flange of piston 10, brake spring group 14 it is each from
It closes spring to be installed on spring base 11 in corresponding blind hole, brake axle 2 is equipped with close to 14 side of brake spring group to piston 10
The axle bumper positioned, piston shell 9 are equipped with the air inlet 9-1 for leading to axial gap 17 between piston shell 9 and piston 10,
When air inlet 9-1 air inlets, piston 10 can overcome the resistance of brake spring group 14 to be axially moved towards 14 direction of brake spring group,
Due on brake axle 2 between piston 10 and brake spring group 14 be equipped with axle bumper, piston 10 can push brake axle 2 together towards from
14 direction of groups of springs is closed to be axially moved；As shown in Fig. 2, the outer end face of the ring flange 1 is equipped with and vehicle bridge wheel side transmission shaft
The matched tooth form of axial end.
As the improvement of the present embodiment, brake assemblies of the invention include friction plate group 5, clutch-plate group 6,7 and of brake pad
Tripping spring group 8, the friction plate group 5 are located in detent housing 4, and the clutch-plate group 6 is located on braked wheel 3, friction
Piece group 5 and clutch-plate group 6 axially arranged for interval, each tripping spring is located at piston shell 9 in the tripping spring group 8
In upper corresponding spring eye 9-2, tripping spring group 8 pushes brake pad 7 to be pressed together friction plate group 5 and clutch-plate group 6
Form the brake portion of brake.
Further, the piston 10 is boss structure, and the small end of boss is arranged facing towards ring flange 1, described
Piston shell 9 and two curved surfaces of piston 10 are in close contact, and sealing ring is equipped between piston shell 9 and curved surface, and sealing ring can
To prevent the gas leak being passed through in axial gap 17；Piston 10 is fixed with close to the end face of 1 side of ring flange by positioning pin 15
Slide thrust washer 16.
As the improvement of the present embodiment, the brake axle 2 and braked wheel 3 use spline fitted.Spline couple stress compared with
It is uniform；Because slot is shallower, stress concentration is smaller at tooth root, and the strength reduction of brake axle 2 and braked wheel 3 is less；The number of teeth is more, always
Contact area is larger, thus can bear larger load.
Further, the inner ring of the braked wheel 3 is being smooth curved surface far from 1 side of ring flange, inside braked wheel 3
Sliding bearing is equipped between smooth curved surface and brake axle 2, sliding bearing is limited close to 1 side of ring flange by the 3 inner ring shaft shoulder of braked wheel,
The other side of sliding bearing is then limited by the hole elastic spring being located on braked wheel 3.Further, the spring base 11
Sliding bearing is equipped between brake axle 2.Sliding bearing at two can ensure brake axle 2 smoothly sliding and rotation.
As the improvement of the present embodiment, as shown in Figure 1, the end face outside of the spring base 11 is fixed with sensor holder
12, sensor holder 12 is equipped with the sensor 13 for monitoring 2 extreme sport position of brake axle.Sensor 13 is braked for determining
Whether device with normal brake application and can release braking.
The present invention includes five parts：Outer interconnecting piece, braking parts, clutch part, piston anti-rotating move portion and test section.
Outer interconnecting piece：As shown in Figure 1, axle housing phase of the brake by seam allowance and bolt and vehicle bridge in detent housing 4
It is fixed.
Braking parts：As shown in Figure 1, ring flange 1, brake axle 2, braked wheel 3, bearing, detent housing 4, friction plate group 5, system
Movable plate group 6, brake pad 7, tripping spring group 8 and piston shell 9 collectively constitute braking parts.Tripping spring group 8 is pressed by brake pad 7
Friction-tight piece group 5 and brake(-holder) block group 6 generate braking moment；When needing parking, braking moment passes through braked wheel 3 and brake axle 2
It is transmitted on ring flange 1, and ring flange 1 and vehicle bridge wheel side transmission shaft mesh together, to realize parking braking；Work as needs
When releasing parking braking, ring flange 1 and vehicle bridge wheel side transmission shaft are separated from, you can release braking, vehicle can be transported normally
Turn.During normal parking, friction plate group 5 and brake(-holder) block group 6 are without opposite sliding, such as when parking torque is excessive：Slope
Road heavy duty parking, friction plate group 5 and brake(-holder) block group 6 produce relative sliding, and overload protection is carried out to parking brake.Ring flange 1
On be equipped with the tooth being equipped with around axial end on alveolus and vehicle bridge wheel side transmission shaft around disk and match, the alveolus of ring flange 1
Engagement and disengaging between the tooth of vehicle bridge wheel side transmission shaft are then realized by clutch part.
Clutch part：As shown in Figure 1, brake axle 2, braked wheel 3, sliding bearing, hole elastic spring, piston 10, sealing ring,
Spring base 11, bearing shim, brake spring group 14, axle bumper, positioning pin 15 and sliding thrust washer 16 collectively constitute clutch part.When
Air inlet 9-1 does not have air pressure into fashionable, and brake spring group 14 presses against piston 10 and moves along a straight line outward, and piston 10, which passes through, slides thrust
Gasket 16 presses against brake axle 2 and ring flange 1 moves along a straight line outward, so that the tooth of ring flange 1 and vehicle bridge wheel side transmission shaft
On tooth mesh together, vehicle bridge wheel side transmission shaft and brake are linked up, realize braking.When air inlet 9-1 has gas
Be pressed into it is fashionable, air pressure overcome brake spring group 14 resistance push 10 negative direction of piston linear motion, piston 10 compress clutch bullet
Spring group 14, and drive brake axle 2 and ring flange 1 inwardly to move along a straight line by axle bumper, the alveolus of ring flange 1 and the transmission of vehicle bridge wheel side
Tooth on axis is separated from, and realizes brake release.Sliding bearing ensures brake axle 2 smoothly sliding and rotation；2 He of brake axle
Spline fitted between braked wheel 3 not only transmits torque, but also plays guiding role.
Piston anti-rotating moves portion：As shown in Figure 1, positioning pin 15, sliding thrust washer 16 and axle bumper collectively constitute piston anti-rotating
Dynamic portion.When ring flange 1 and the into and out engagement of vehicle bridge wheel side transmission shaft, ring flange 1 and brake axle 2 have the possibility of rotation；
Or all brakes for vehicle fail the same time and enter engagement or disengagement engagement, the method for partial brake device when acting
Blue disk 1 and brake axle 2 have the possibility of rotation；The rotation of ring flange 1 and brake axle 2 may be such that piston 10 is also driven, living
The rotation of plug 10 can reduce the service life of sealing ring so that the air-tightness of brake declines, and the rotation of piston 10 can make
14 run-off the straight of brake spring group, may make clutch part can not work normally.Axle bumper is brake axle 2, sliding thrust washer 16
It is together in series with piston 10, and stays the gap of 0.3~0.5mm between piston 10 and transmission shaft 2；Sliding thrust washer 16 is determined
Position pin 15 is fixed on the end face of piston 10, and sliding 16 friction coefficient of thrust washer is small, when brake and transmission shaft enter engagement,
Piston anti-rotating moves portion and can be preferably minimized the torsional moment that piston 10 is subject to；It is living when brake and transmission shaft are disengaged from
There is gap between plug 10 and transmission shaft 2 so that piston 10 is not by torsional moment.
Test section：As shown in Figure 1, sensor holder 12 and sensor 13 constitute test section.Sensor 13 is made by detecting
The extreme position that moving axis 2 outwardly or inwardly moves determine brake whether can with normal brake application and release brake.
Claims (7)
1. a kind of pneumatic parking brake, it is characterised in that：Including ring flange（1）, brake axle（2）, braked wheel（3）, drag housing
Body（4）, piston shell（9）, piston（10）And spring base（11）, the braked wheel（3）It is located at brake axle（2）Upper and brake axle
（2）It can be along braked wheel（3）Axial movement；The detent housing（4）And piston shell（9）It is bolted, drag housing
Body（4）And braked wheel（3）With piston shell（9）And braked wheel（3）Between be set with bearing, detent housing（4）And piston shell
（9）Between be equipped with limitation braked wheel（3）The brake assemblies of axial rotation；Ring flange（1）It is fixed on brake axle（2）Close to detent housing
（4）On the end face of side；The spring base（11）It is bolted on piston shell（9）On, the piston（10）Suit
In brake axle（2）On, and can be in piston shell（9）And spring base（11）Between move axially, spring base（11）On be set with and push away
Piston（10）To ring flange（1）The brake spring group of side movement（14）, brake axle（2）Close to brake spring group（14）Side is set
Have to piston（10）The axle bumper positioned, piston shell（9）It is equipped with and leads to piston shell（9）And piston（10）Between it is axial
Gap（17）Air inlet（9-1）；The ring flange（1）Outer end face be equipped with and vehicle bridge wheel side transmission shaft axial end match
The tooth form of conjunction.
2. a kind of pneumatic parking brake according to claim 1, it is characterised in that：The brake assemblies include friction
Piece group（5）, clutch-plate group（6）, brake pad（7）With tripping spring group（8）, the friction plate group（5）It is located at detent housing（4）
On, the clutch-plate group（6）It is located at braked wheel（3）On, friction plate group（5）With clutch-plate group（6）Axially arranged for interval,
The tripping spring group（8）Interior each tripping spring is located at piston shell（9）Upper corresponding spring eye（9-2）It is interior, braking
Groups of springs（8）Push brake pad（7）By friction plate group（5）With clutch-plate group（6）It is pressed together.
3. a kind of pneumatic parking brake according to claim 1, it is characterised in that：The piston（10）For boss knot
Structure, the small end of boss is facing towards ring flange（1）Setting, the piston shell（9）With piston（10）Two curved surfaces it is close
Contact, and piston shell（9）Sealing ring is equipped between curved surface；Piston（10）Close to ring flange（1）The end face of side passes through positioning
Pin（15）It is fixed with sliding thrust washer（16）.
4. a kind of pneumatic parking brake according to claim 1, it is characterised in that：The brake axle（2）And braking
Wheel（3）Using spline fitted.
5. a kind of pneumatic parking brake according to claim 4, it is characterised in that：The braked wheel（3）Inner ring
Far from ring flange（1）Side is smooth curved surface, braked wheel（3）Internal smooth curved surface and brake axle（2）Between be equipped with sliding axle
It holds.
6. a kind of pneumatic parking brake according to claim 1, it is characterised in that：The spring base（11）With braking
Axis（2）Between be equipped with sliding bearing.
7. a kind of pneumatic parking brake according to claim 1~6 any one, it is characterised in that：The spring
Seat（11）End face outside be fixed with sensor holder（12）, sensor holder（12）It is equipped with for monitoring brake axle（2）The limit is transported
The sensor of dynamic position（13）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848280.7U CN207701632U (en) | 2017-12-26 | 2017-12-26 | A kind of pneumatic parking brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848280.7U CN207701632U (en) | 2017-12-26 | 2017-12-26 | A kind of pneumatic parking brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207701632U true CN207701632U (en) | 2018-08-07 |
Family
ID=63028715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721848280.7U Active CN207701632U (en) | 2017-12-26 | 2017-12-26 | A kind of pneumatic parking brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207701632U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939864A (en) * | 2017-12-26 | 2018-04-20 | 徐州科源液压股份有限公司 | Pneumatic parking brake |
| CN111409606A (en) * | 2020-04-13 | 2020-07-14 | 长沙凯瑞重工机械有限公司 | Driven axle braking system |
-
2017
- 2017-12-26 CN CN201721848280.7U patent/CN207701632U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939864A (en) * | 2017-12-26 | 2018-04-20 | 徐州科源液压股份有限公司 | Pneumatic parking brake |
| CN107939864B (en) * | 2017-12-26 | 2024-01-30 | 徐州科源液压股份有限公司 | Pneumatic parking brake |
| CN111409606A (en) * | 2020-04-13 | 2020-07-14 | 长沙凯瑞重工机械有限公司 | Driven axle braking system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103375515B (en) | Driving and parking linked multi-sheet wet-type liquid braking device | |
| CN111043185B (en) | Integrated low-delay intermediate shaft brake | |
| CN207701632U (en) | A kind of pneumatic parking brake | |
| CN103671618A (en) | Clutch actuator assembly for vehicle automatic transmission | |
| CN209705119U (en) | A kind of wet type clutch export structure and tractor | |
| CN107939864A (en) | Pneumatic parking brake | |
| CN206290612U (en) | A kind of and gearbox integration-in-one multi-sheet wet-type EPB | |
| CN103486159A (en) | Driving and parking dual-purpose wet-type multi-piece brake | |
| CN201934549U (en) | Running speed reducer brake for service braking | |
| CN202402523U (en) | Multi-disc wet type brake | |
| CN106763307A (en) | A kind of and gearbox integration-in-one multi-sheet wet-type EPB | |
| CN110171789A (en) | A kind of fork truck type wet drive axle | |
| CN203784163U (en) | Quantitative returning disc brake for electric automobile | |
| CN203594713U (en) | Wet-type drive axle | |
| CN103895493B (en) | The double-motor assembly of the integrated dual planetary gear brake coupling of a kind of hybrid power passenger car | |
| CN217271541U (en) | Normally closed wet brake with double friction pairs | |
| CN106286648B (en) | Brake for hydrostatic transmissions | |
| CN106740745B (en) | Wet braking drive axle of scraper | |
| CN209616792U (en) | A kind of new automobile disc type rear axle assy of 5.5 tons of carrying | |
| CN204387162U (en) | A kind of novel multi-disc disk type integrated arrestor | |
| CN203611961U (en) | Wet front axle | |
| CN207018389U (en) | Pneumatic power wet-type brake | |
| CN206845737U (en) | Large-scale track maintenance vehicles transmit disengaging gear with gearbox dynamic | |
| CN206265034U (en) | Parking brake for open type motor vehicles | |
| CN205836791U (en) | A kind of fork truck wet brake of band connecting plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |