CN208698787U - A kind of low and slow decompression force parks cylinder - Google Patents
A kind of low and slow decompression force parks cylinder Download PDFInfo
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- CN208698787U CN208698787U CN201821311254.5U CN201821311254U CN208698787U CN 208698787 U CN208698787 U CN 208698787U CN 201821311254 U CN201821311254 U CN 201821311254U CN 208698787 U CN208698787 U CN 208698787U
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Abstract
The utility model discloses a kind of low and slow decompression forces to park cylinder, including parking cylinder composition, piston composition, energy storage spring, screw rod composition, parking cylinder seat composition and pawl composition, the piston composition includes piston and guide cylinder, the guide cylinder lower end opening portion is together with the detachable fixed seal connection of piston upper end, the cylinder diameter for parking cylinder for relieving stress air effective active area and being sealed by piston that lower section is filled with is formed by piston, without subtracting the endoporus area of guide cylinder.The utility model is by improving the piston structure for parking cylinder, guide cylinder and piston are installed together, under identical energy storage spring active force, using the utility model park cylinder it is minimum relieve stress it is lower, compared with the existing structure that guide sleeve is fixed on to cylinder body, it is minimized so that parking cylinder minimum and relieving stress, effectively prevents the malfunction for parking cylinder.
Description
Technical field
The utility model belongs to rail vehicle braking equipment technical field, in particular to a kind of low and slow decompression force parks cylinder.
Background technique
Rail traffic Parking Brake Cylinders are wanted under certain slope condition with parking brake primarily to meeting vehicle
It asks.Parking brake is generally realized by parking the effect of the energy storage spring in cylinder.The application and alleviation of parking brake can utilize pressure
Contracting air is realized: being applied parking brake when compressed air is discharged, is alleviated parking brake when being filled with compressed air.In addition,
Apply parking brake power by parking the extremely caused accident of cylinder in order to alleviate, or without compressed air but alleviation is needed to stop
When putting braking, Parking Brake Cylinders need hand relieving mechanism.
The alleviation air pressure for parking cylinder is typically derived from locomotive main air reservoir, it is excessive relieve stress (such as more than
600kPa), may result in and park cylinder malfunction: such as railcar, fully loaded passenger get off, and air spring uses air quantity
Greatly, it may cause and park cylinder and be filled with that air pressure is low to lead to parking brake.So relieving stress it is generally desirable to Parking Brake Cylinders
It is lower.
Guide sleeve in existing Parking Brake Cylinders composition, which is welded to, to be parked on cylinder body, causes calculating minimum delay in this way
When decompression force, the existing area of a circle parked piston effective area processed and need to subtract guide sleeve diameter for A relieves stress it relatively
It gets higher, for example parking cylinder cylinder diameter is 178mm, complete incidence graph energy storage spring directed force F=11KN, guide sleeve diameter A=74mm, then existing
There is the minimum for parking cylinder to relieve stress then as 534kPa.
Utility model content
The goal of the invention of the utility model is: in view of the above problems, providing one kind and can be effectively reduced and park
The low and slow decompression force that cylinder relieves stress parks cylinder.
The technical solution of the utility model is achieved in that a kind of low and slow decompression force parks cylinder, including park cylinder composition,
Piston composition, screw rod composition, parks cylinder seat composition and pawl composition at energy storage spring, it is characterised in that: the piston, which forms, includes
Piston and guide cylinder, the guide cylinder lower end opening portion is together with the detachable fixed seal connection of piston upper end, by living
The cylinder diameter for parking cylinder for relieving stress air effective active area and being sealed by piston that plug composition lower section is filled with, without subtracting
The endoporus area of guide cylinder.
Low and slow decompression force described in the utility model parks cylinder, and the guide cylinder is connect with piston thread, and is equipped with close
Seal is sealed, the drilling between the guide cylinder and piston, after screw rod group to be mounted in piston composition in groups, to drilling
Elastic cylindrical pin is inside squeezed into be connected and fixed.
Low and slow decompression force described in the utility model parks cylinder, is respectively fitted with and leads in the outer circle groove of the piston
To band and U-shaped sealing ring.
Low and slow decompression force described in the utility model parks cylinder, the piston inner hole top is provided with antirotation keys, institute
It states antirotation keys to connect by interference fit with piston, up-thrust bearing, nut, lower thrust axis is successively fixedly mounted in the piston
It holds, bearing block and backup washer component, the screw rod composition include screw rod and screw rod disk, set on the screw rod along its axial direction
It is equipped with the screw rod keyway with antirotation keys cooperation, the pawl composition includes ratchet and pawl, is provided in the nut excircle
Nut keyway is provided with the raised key with nut keyway corresponding matching in the ratchet inner hole.
Low and slow decompression force described in the utility model parks cylinder, and the backup washer component includes support sleeve and hole gear
Circle, the support set upper side are supported on bearing block lower end by cushion, and the support sleeve lower end, which is supported on, to be fixed in piston
Hole retaining ring on.
Low and slow decompression force described in the utility model parks cylinder, and the screw rod is threadedly coupled with screw rod disk, in the spiral shell
Bar disk periphery is provided with annular groove, guide ring is provided in the annular groove, the guide ring is circular for an opening, and institute
State the annular groove outer diameter that guide ring internal diameter is greater than screw rod disk.
Low and slow decompression force described in the utility model parks cylinder, and the screw rod lower end is provided with screw rod shelves screw thread
Hole is equipped with screw rod shelves in the screw rod shelves threaded hole.
Low and slow decompression force described in the utility model parks cylinder, and the nut inner thread is non-self-lock-ing screw thread, with spiral shell
The externally threaded non-self-lock-ing screw thread engagement of bar.
Guide cylinder and piston are installed together by improving to the piston structure for parking cylinder by the utility model,
Under identical energy storage spring active force, the minimum of cylinder is parked using the utility model and relieves stress lower, fixes guide sleeve with existing
It is compared in the structure of cylinder body, is minimized so that parking cylinder minimum and relieving stress, effectively prevents the malfunction for parking cylinder.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram that piston forms in the utility model.
Fig. 3 is the structural schematic diagram of nut in the utility model.
Fig. 4 is the structural schematic diagram of ratchet in the utility model.
Fig. 5 and Fig. 6 is the structural schematic diagram of screw arbor assembly in the utility model.
Fig. 7 is structural schematic diagram of the utility model in inflation alleviating position.
Fig. 8 is structural schematic diagram of the utility model in retarder location.
Marked in the figure: 1 forms to park cylinder, 2 form for piston, and 3 be energy storage spring, and 4 form for screw rod, and 5 be to park cylinder seat
Composition, 6 form for pawl, and 7 be screw rod shelves, and 21 be hole retaining ring, and 22 be bearing block, and 23 be nut, and 23a is nut keyway, and 24
It is guide cylinder for sealing ring, 25,26 be antirotation keys, and 27 be elastic cylindrical pin, and 28 be up-thrust bearing, and 29 be lower thrust-bearing,
30 be cushion, and 31 be support sleeve, and 32 be guidance tape, and 33 be U-shaped sealing ring, and 34 be piston, and 41 be guide ring, and 42 be screw rod
Disk, 43 be annular groove, and 44 be screw rod, and 44a is screw rod keyway, and 44b is screw rod shelves threaded hole, and 61 be ratchet, and 61a is raised key,
62 be pawl, and 63 be pull ring.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Figure 1, a kind of low and slow decompression force parks cylinder, including park cylinder composition 1, piston composition 2, energy storage spring 3, screw rod
Composition 4 parks cylinder seat composition 5 and pawl composition 6, and the piston composition 2 includes piston 34 and guide cylinder 25, the guide cylinder
25 lower end opening portions together with the detachable fixed seal connection in 34 upper end of piston, by piston form 2 lower sections be filled with it is slow
The cylinder diameter for parking cylinder that decompression force air effective active area is sealed by piston 34, without subtracting the inner hole surface of guide cylinder 25
Product.In this way, under identical energy storage spring active force, using the utility model park cylinder it is minimum relieve stress it is lower.
It can be seen that the utility model is with the existing main distinction for parking cylinder, in existing Parking Brake Cylinders composition
Guide sleeve, which is welded to, parks cylinder body, and the guide cylinder of the utility model is mounted on piston composition, is calculating minimum alleviate
When pressure, existing the cylinder piston effective area of parking needs to subtract the area of a circle that guide sleeve diameter is A.In identical energy storage spring active force
Under F, according to P=F/S, minimum relieve stress that the low and slow decompression force of the utility model parks cylinder wants low.For example park cylinder cylinder diameter
178mm, complete incidence graph energy storage spring directed force F=11kN, A=74mm, then existing cylinder minimum of parking relieves stress 534kPa, and originally
The low and slow decompression force Parking Brake Cylinders minimum of utility model relieves stress only 442kPa.
As shown in Fig. 2,3 and 4, the guide cylinder 25 is threadedly coupled with piston 34, and is equipped with sealing ring 24 and is sealed, and is
Prevent the screw thread of guide cylinder 25 from exiting, screw rod composition 4 is being assembled in work by the drilling between the guide cylinder 25 and piston 34
After plug composition 2, elastic cylindrical pin 27 is squeezed into drilling and is connected and fixed, is respectively fitted in the outer circle groove of the piston 34
Guidance tape 32 and U-shaped sealing ring 33.
Wherein, the 34 inner hole top of piston is provided with antirotation keys 26, the antirotation keys 26 are by interference fit and live
34 connection of plug, be successively fixedly mounted in the piston 34 up-thrust bearing 28, nut 23, lower thrust-bearing 29, bearing block 22 with
And backup washer component, the backup washer component include support sleeve 31 and hole retaining ring 21,31 upper end of support sleeve passes through
Cushion 30 is supported on 22 lower end of bearing block, and 31 lower end of support sleeve is supported on the hole retaining ring 21 being fixed in piston 34
On, the screw rod composition 4 includes screw rod 44 and screw rod disk 42, and 23 internal screw thread of nut is non-self-lock-ing screw thread, with screw rod 44
Externally threaded non-self-lock-ing screw thread engagement, is provided with the screw rod keyway cooperated with antirotation keys 26 on the screw rod 44 along its axial direction
44a, in this way, screw rod 44 can only move up and down, without being able to rotate, the pawl composition 6 includes ratchet 61 and pawl 62, described
23 excircle of nut is provided with nut keyway 23a, is provided in 61 inner hole of ratchet convex with nut keyway 23a corresponding matching
Key 61a is played, such nut 23 can be rotated together with ratchet 61, and can opposite sliding up and down.
As it can be seen in figures 5 and 6, the screw rod 44 is threadedly coupled with screw rod disk 42, and it is equipped with elastic cylindrical pin and prevents the two
Between rotate and exit, wherein external thread of screw is non-self-lock-ing screw thread, 42 periphery of screw rod disk is provided with annular groove 43, described
Guide ring 41 is provided in annular groove 43, the guide ring 41 is that an opening is circular, and 41 internal diameter of the guide ring is greater than spiral shell
43 outer diameter of annular groove of bar disk 42, after screw rod, which forms, is packed into piston, guide ring plays a supportive role to screw rod composition, and screw rod is in diameter
To that can move about, the other strength of screw rod is prevented, power output is influenced；44 lower end of screw rod is provided with screw rod shelves threaded hole 44b,
After parking cylinder assembling, screw rod shelves 7 are assembled in the screw rod shelves threaded hole 44b, and screw thread glue is needed to lock.
The working principle of the utility model is:
(1) inflation is alleviated
Rigid group install after park cylinder as shown in Figure 1, charged pressure air, piston driving nut move upwards, nut with
The engagement of screw rod non-self-locking nut, screw rod are limited by antirotation keys and can only be moved up and down, in this way, nut is clockwise (under upward)
Rotation moves upwards, and until cylinder body is parked in guide cylinder contact, completion inflation is alleviated, as shown in Figure 7.In above process, due to
Nut and ratchet are keyed, up and down energy relative motion, but are unable to relative rotation, ratchet also rotation clockwise under the drive of nut
Turn.
(2) parking brake
When the pressure air below piston is parked in emptying, parks piston and moved downward under the action of energy storage spring, nut
Screw rod is driven to move down, nut has counterclockwise (under upward) rotation trend, but the ratchet due to being keyed therewith is by pawl
Limitation, cannot rotate counterclockwise, and such nut drives screw rod to move down, and the piston that screw rod is pushed to checking cylinder (does not draw this zero
Part) parking brake is formed, as shown in Figure 8.
(3) hand relieving
After Parking Brake Cylinders air draft braking, its alleviation can be made by charged pressure air again, in the effect of pressure air
Under, piston driving nut, screw rod moves upwards, and parks cylinder body until guide cylinder touches, and in this process, nut does not occur to turn
It is dynamic.
When because of various reasons, it cannot make to park cylinder using charged pressure air when alleviating, hand relieving can be used.It draws
The pull ring 63 of pawl composition, pawl is to the restriction cancellation of ratchet, there is counterclockwise (under upward nut when due to parking brake
See) rotation trend as a result show as piston once pawl, to the restriction cancellation of ratchet, nut rotates counterclockwise and move down, screw rod
It is moved up under the action of checking cylinder return spring, completes hand relieving, as shown in Figure 1.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (8)
1. a kind of low and slow decompression force parks cylinder, including parks cylinder composition (1), piston composition (2), energy storage spring (3), screw rod composition
(4), cylinder seat composition (5) and pawl composition (6) are parked, it is characterised in that: the piston composition (2) includes piston (34) and leads
To cylinder (25), guide cylinder (25) lower end opening portion together with the detachable fixed seal connection in piston (34) upper end,
The cylinder for parking cylinder for relieving stress air effective active area and being sealed by piston (34) being filled with below (2) is formed by piston
Diameter, without subtracting the endoporus area of guide cylinder (25).
2. low and slow decompression force according to claim 1 parks cylinder, it is characterised in that: the guide cylinder (25) and piston (34)
It is threadedly coupled, and is equipped with sealing ring (24) and is sealed, the drilling between the guide cylinder (25) and piston (34), by spiral shell
After bar composition (4) is assembled in piston composition (2), elastic cylindrical pin (27) is squeezed into drilling and is connected and fixed.
3. low and slow decompression force according to claim 1 parks cylinder, it is characterised in that: in the outer circle groove of the piston (34)
Inside it is respectively fitted with guidance tape (32) and U-shaped sealing ring (33).
4. low and slow decompression force according to claim 1 parks cylinder, it is characterised in that: set on the piston (34) inner hole top
It is equipped with antirotation keys (26), the antirotation keys (26) are connect by interference fit with piston (34), successively solid in the piston (34)
Dingan County loads onto thrust bearing (28), nut (23), lower thrust-bearing (29), bearing block (22) and backup washer component, described
Screw rod composition (4) includes screw rod (44) and screw rod disk (42), is provided on the screw rod (44) along its axial direction and antirotation keys
(26) the screw rod keyway (44a) cooperated, the pawl composition (6) includes ratchet (61) and pawl (62), in the nut (23)
Excircle is provided with nut keyway (23a), is provided in the ratchet (61) inner hole convex with nut keyway (23a) corresponding matching
It rises key (61a).
5. low and slow decompression force according to claim 4 parks cylinder, it is characterised in that: the backup washer component includes support
It covers (31) He Kongyong retaining ring (21), support sleeve (31) upper end is supported on bearing block (22) lower end, institute by cushion (30)
It states support sleeve (31) lower end and is supported on and be fixed on the hole in piston (34) on retaining ring (21).
6. low and slow decompression force according to claim 4 parks cylinder, it is characterised in that: the screw rod (44) and screw rod disk (42)
It is threadedly coupled, screw rod disk (42) periphery is provided with annular groove (43), be provided with guide ring in the annular groove (43)
(41), the guide ring (41) is that an opening is circular, and the guide ring (41) internal diameter is greater than the annular groove of screw rod disk (42)
(43) outer diameter.
7. low and slow decompression force according to claim 6 parks cylinder, it is characterised in that: be arranged in the screw rod (44) lower end
There is screw rod shelves threaded hole (44b), is equipped with screw rod shelves (7) in the screw rod shelves threaded hole (44b).
8. low and slow decompression force according to claim 4 parks cylinder, it is characterised in that: nut (23) internal screw thread be it is non-from
Screw thread is locked, is engaged with the externally threaded non-self-lock-ing screw thread of screw rod (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821311254.5U CN208698787U (en) | 2018-08-15 | 2018-08-15 | A kind of low and slow decompression force parks cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821311254.5U CN208698787U (en) | 2018-08-15 | 2018-08-15 | A kind of low and slow decompression force parks cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208698787U true CN208698787U (en) | 2019-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821311254.5U Active CN208698787U (en) | 2018-08-15 | 2018-08-15 | A kind of low and slow decompression force parks cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN208698787U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108944991A (en) * | 2018-08-15 | 2018-12-07 | 眉山中车制动科技股份有限公司 | A kind of low and slow decompression force parks cylinder |
| CN108944991B (en) * | 2018-08-15 | 2024-07-19 | 眉山中车制动科技股份有限公司 | Low pressure parking cylinder that alleviates |
-
2018
- 2018-08-15 CN CN201821311254.5U patent/CN208698787U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108944991A (en) * | 2018-08-15 | 2018-12-07 | 眉山中车制动科技股份有限公司 | A kind of low and slow decompression force parks cylinder |
| CN108944991B (en) * | 2018-08-15 | 2024-07-19 | 眉山中车制动科技股份有限公司 | Low pressure parking cylinder that alleviates |
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