CN201437367U - Two-way compressing brake shoe slack adjuster - Google Patents
Two-way compressing brake shoe slack adjuster Download PDFInfo
- Publication number
- CN201437367U CN201437367U CN200920227667XU CN200920227667U CN201437367U CN 201437367 U CN201437367 U CN 201437367U CN 200920227667X U CN200920227667X U CN 200920227667XU CN 200920227667 U CN200920227667 U CN 200920227667U CN 201437367 U CN201437367 U CN 201437367U
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- cylindrical shell
- spring
- adjustment nut
- pull bar
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Abstract
The utility model discloses a two-way compressing brake shoe slack adjuster. The brake shoe slack adjuster comprises a coupling head, a first cylinder body, a second cylinder body, a third cylinder body and a hollow end cover which are connected in sequence, wherein an adjusting nut is located in the second cylinder body, a pull rod is located in the first cylinder body, and a threaded rod penetrates the first, the second and the third cylinder bodies; a first spring is sleeved on the pull rod, and a second spring is sleeved on the threaded rod; one end of an operating rod is hinged on the coupling head, the rod body penetrates a lateral through hole of the coupling head and a horizontal through hole of the pull rod, and the other end of the operating rod is connected with a control lever through a control lever mounting hole; and the control lever is used for adjusting the intensity of the action forces of the first and the second springs on the adjusting nut, so that under the two-way action forces of the two springs, the adjusting nut can move between the first and the second cylinder bodies, and can be meshed therewith or released therefrom. The adjuster with simple structure can be applied to brake apparatus of railway wagons for automatic and accurate brake shoe slack adjustment, so as to provide uniform brake force for railway vehicles.
Description
Technical field
The utility model relates to the brake slack adjuster in the railway truck brake equipment, refers to a kind of bidirectional compression type shoe gap adjuster particularly.
Background technology
Along with the fast development of railway transportation, also more and more higher to the requirement of railway truck brake equipment.Brake cylinder is one of critical component of brake equipment, and the quality of its performance is very big to the reliability and the influence in service life of whole brake equipment.For the vehicle of piston travel overlength, its braking force will reduce, and lag behind with respect to the normal car brakeing of other piston stroke simultaneously.For the too short vehicle of piston travel, its braking force will increase, with respect to the normal car brakeing of other piston stroke in advance simultaneously.No matter braking retardation or braking all will cause Lognitudinal Impact of Trains to increase in advance.Under the pattern of current vehicle heavy duty high-speed cruising, keeping piston travel is very important in the scope of a relative close tolerance, otherwise the longitudinal impact force can't accurately control train braking the time, even lead to the train traffic safety accident.
The piston travel overlength or too short mainly be because the brake clearance in the brake equipment strengthens than normal value or reduces and cause, and the correction of brake clearance depends on brake slack adjuster.At present, the brake slack adjuster that is adopted in the railway truck brake equipment is biaxial tension formula structure mostly, and it is subjected to tensile force and works during car brakeing.The defective of its existence mainly contains following several respects: the one, and the structure of this adjuster is comparatively complicated, in order to realize its expanding-contracting action, needs to adopt four springs, the corresponding increase of assembly technology difficulty, manufacturing cost is also corresponding to be increased; The 2nd, the once maximum shortening amount of this adjuster is about 60mm, and one time the maximum elongation amount is about 30mm, for the bigger adjustment amount of brake clearance, can not once adjust to the right place, needs repeatedly to adjust and can realize.Like this, complicated and changeable, the inefficiency of mode adjusted of brake clearance not only, and adjusting accuracy is low, error big, gap value is not easy control, cause piston travel to be not easy to maintain in the normal constant scope, the braking force that acts on the wheel becomes inhomogeneous, the safe reliability variation of vehicle operating; The 3rd, this adjuster only is adapted to be mounted within on the car body, has limited the design space of vehicle to a certain extent.
Summary of the invention
The purpose of this utility model will solve above-mentioned existing in prior technology deficiency exactly, provide a kind of simple in structure, can accurately transfer big automatically or turn brake clearance down, provide the more evenly bidirectional compression type shoe gap adjuster of braking force for rolling stock.
For achieving the above object, bidirectional compression type shoe gap adjuster provided by the utility model, mainly by first cylindrical shell, second cylindrical shell, the 3rd cylindrical shell, first spring, second spring, parts such as coupling head, control stalk, joystick, pull bar, adjustment nut, screw rod and hollow end cap are formed, and its key points in design is:
One end of A. described first cylindrical shell links to each other with the afterbody of coupling head, and the other end of first cylindrical shell is connected with the threaded one end of second cylindrical shell, and the other end of second cylindrical shell is connected with the threaded one end of the 3rd cylindrical shell, and the other end of the 3rd cylindrical shell links to each other with the hollow end cap.
B. described adjustment nut is positioned at second cylindrical shell, on the outer wall of adjustment nut in opposite directions or be arranged with two conical ring faces, one of them conical ring face can with the end conical surface engagement fit of first cylindrical shell, another conical ring face can with the inward flange conical surface engagement fit of second cylindrical shell.
C. described pull bar is positioned at first cylindrical shell, and an end of pull bar is provided with cross through hole, and the other end of pull bar is provided with vertical blind hole; The cross through hole of pull bar extend out in first cylindrical shell the side direction through hole that the coupling head afterbody offers, and the tail end of vertical blind hole of pull bar extends to the end face counterbore place of adjustment nut.
D. described screw rod is in first cylindrical shell, second cylindrical shell and the 3rd cylindrical shell, and the screw flight section screws out from adjustment nut and extend in vertical blind hole of pull bar, and the polished rod section of screw rod is stretched out in the hollow end lid and linked to each other with screw head.
E. the two ends of described adjustment nut are provided with the bearing that can be convenient to its rotation, and the outside of bearing is provided with trip ring, and the polished rod section middle part of screw rod is provided with fixedly back-up ring; First spring housing is contained on the pull bar, between an end trip ring and coupling head of adjustment nut; Second spring housing is contained on the screw rod, at the other end trip ring of adjustment nut and fixedly between the back-up ring; Under the effect of first spring and second spring, adjustment nut can move between first cylindrical shell and second cylindrical shell, and with first cylindrical shell and second cylindrical shell or engagement or disengaging.
F. an end of described joystick is hinged by bearing pin and coupling head, and the shaft of joystick passes the side direction through hole of coupling head and the cross through hole of pull bar simultaneously, and the other end of joystick is provided with the control stalk mounting hole; The thread segment of control stalk passes the control stalk mounting hole and is matched with in the control stalk mounting hole with the lining nut thread, also is provided with the Thrust nut that reclines and cooperate with the lining nut on the thread segment of control stalk; Drive joystick by control stalk and rotate around bearing pin, but drive stay move, put on amount of force on the adjustment nut and then control adjustment nut and first cylindrical shell and second cylindrical shell or engagement or disengaging thereby adjust first spring and second spring.
Principle of work of the present utility model is such: second spring is used to promote the engagement of the adjustment nut disengaging and second cylindrical shell, and be delivered to compressive force combined action on the screw rod by screw head with the vehicle foundation brake rigging, force the engagement of the adjustment nut and first cylindrical shell.First spring is used to overcome the elastic force of second spring, and promotes adjustment nut and the engagement of second cylindrical shell.And joystick is used to regulate the size of first spring and second acting force of the spring.When adjustment nut and first cylindrical shell or second cylindrical shell were in disengaging configuration, adjustment nut can be around the rotation of screw flight section, and this moment can be by changing the length that relative position between screw rod and the cylindrical shell change brake slack adjuster.When adjustment nut was in first cylindrical shell or the second cylindrical shell engage position, adjustment nut can not rotate around the screw flight section, thereby the relative position that can hinder between screw rod and the cylindrical shell changes, and the length of brake slack adjuster can not change yet.
Compare with traditional biaxial tension formula brake slack adjuster that is installed on the car body, the utlity model has following advantage:
One, this adjuster only rely on the application force of two bidirectional compression type springs to change, and just can change the position relation of screw rod and cylindrical shell, thereby realize the adjustment action of brake clearance, its structure tube list, stable performance, be easy to processing and assembling, the corresponding reduction of productive costs.
Its two, the screw rod shortening amount of this adjuster or elongation can once be adjusted to the right place according to the value of actual needs, have effectively avoided traditional drawing brake slack adjuster to need repeatedly to adjust the defective that just can put, adjust inefficiency in place.
They are three years old, vertically moving of the Spin Control screw rod of this adjuster by adjustment nut, foundation brake gap that can stepless automatically regulating railway truck, and can accurately this gap width be controlled in the constant scope, thereby keep piston travel in the limit of regulation, make the braking force that acts on the wheel more even, vehicle operating is more safe and reliable.
Its four, this adjuster is adapted to be mounted within on the bogie truck of rail freight, need not take vehicle body space, and can make the design space, bottom of car body more reasonable.
Description of drawings
Fig. 1 is a kind of sectional structure scheme drawing of bidirectional compression type shoe gap adjuster;
Fig. 2 is the structure for amplifying scheme drawing of the left side component part among Fig. 1;
Fig. 3 is the structure for amplifying scheme drawing of the middle component part among Fig. 1;
Fig. 4 is the structure for amplifying scheme drawing of the right side component part among Fig. 1;
Fig. 5 analyses and observe the structure for amplifying scheme drawing for the adjustment nut among Fig. 1;
Fig. 6 analyses and observe the structure for amplifying scheme drawing for the pull bar among Fig. 1.
The specific embodiment
Below in conjunction with the drawings and specific embodiments bidirectional compression type shoe gap adjuster of the present utility model is described in further detail:
Bidirectional compression type shoe gap adjuster shown in the figure, mainly by first cylindrical shell 6, second cylindrical shell 9, the 3rd cylindrical shell 10, first spring 7, second spring 11, parts such as coupling head 1, control stalk 2, joystick 15, pull bar 5, adjustment nut 8, screw rod 12 and hollow end cap 13 are formed.Structural relation between each parts specifically describes as follows:
A. an end of first cylindrical shell 6 and the afterbody of coupling head 1 are by being threaded, one end of the other end of first cylindrical shell 6 and second cylindrical shell 9 is by being threaded, one end of the other end of second cylindrical shell 9 and the 3rd cylindrical shell 10 is by being threaded, and the other end of the 3rd cylindrical shell 10 then links to each other with hollow end cap 13.
E. the two ends of adjustment nut 8 are provided with bearing 21, wherein are sleeved on the convex shoulder 5d of pull bar 5 near the bearing 21 of first cylindrical shell, 6 one sides, fit with the end of adjustment nut 8; Bearing 21 near the 3rd cylindrical shell 10 1 sides is sleeved on the cylindrical wall of adjustment nut 8; The effect of bearing 21 is to allow adjustment nut 8 to rotate freely around screw rod 12.The outside of at both ends bearing 21 is equipped with trip ring 20, is processed with fixedly back-up ring 22 at the polished rod section middle part of screw rod 12.First spring 7 is sleeved on the pull bar 5, between an end trip ring 20 and coupling head 1 of adjustment nut 8; Second spring 11 is sleeved on the screw rod 12, at the other end trip ring 20 of adjustment nut 8 and fixedly between the back-up ring 22.Design the precompressed compression of the precompressed compression of first spring 7 greater than second spring 11, under the effect of first spring 7, second spring 11 and car brakeing power, adjustment nut 8 can move between first cylindrical shell 6 and second cylindrical shell 9, and with first cylindrical shell 6 and second cylindrical shell 9 or engagement or break away from.
F. an end of joystick 15 is hinged by bearing pin 16 and coupling head 1.The shaft of joystick 15 passes the side direction through hole 1a of coupling head 1 and the cross through hole 5a of pull bar 5 simultaneously, also is provided with sphere flange 15b on the shaft of joystick 15, so that push matching relationship with the sidewall 5c formation of cross through hole 5a.The other end of joystick 15 is provided with control stalk mounting hole 15a.The thread segment of control stalk 2 pass control stalk mounting hole 15a and with lining nut 3 screws thread fit in control stalk mounting hole 15a, also be provided with the Thrust nut 4 that reclines and cooperate with lining nut 3 on the thread segment of control stalk 2.When control stalk 2 is subjected to the effect of car brakeing power mobile, lining nut 3 is engaged among the control stalk mounting hole 15a with joystick 15, drive the sidewall 5c engagement of sphere flange 15b and cross through hole 5a and drive pull bar 5 and vertically move, trip ring 20 compressions first spring 7 at the convex shoulder 5d place by being enclosed within pull bar 5, make first spring 7 put on application force on the adjustment nut 8 and be reduced to less than second spring 11 and put on application force on the adjustment nut 8, thereby make adjustment nut 8 break away from engage position with second cylindrical shell 9.
When bidirectional compression type shoe gap adjuster of the present utility model being installed on the bogie truck of rail freight, coupling head 1 and control stalk 2 all are connected with a lever in the vehicle foundation brake rigging by round pin, and screw head 14 is connected with another root lever in the vehicle foundation brake rigging by round pin.Under the vehicle relieved state, bidirectional compression type shoe gap adjuster is not subjected to external force, and each parts remains on separately position according to the precompressed compression effect of first spring 7 and second spring 11.Because the precompressed compression of design first spring 7 is greater than the precompressed compression of second spring 11, so the conical ring face 8a of adjustment nut 8 and the end conical surface 6a of first cylindrical shell 6 are in disengaged position, another conical ring face 8b of adjustment nut 8 and the inward flange conical surface 9a of second cylindrical shell 9 are in engagement, and the control stalk mounting hole 15a on lining nut 3 and the joystick 15 is in disengaged position.Its concrete working process divides three operating modes to set forth:
One. brake clearance is the operating mode of normal value: during car brakeing, the brake cylinder piston stretches out, and begins to drive lever and then mobile brake shoe relies on wheel.Control stalk 2 is followed lever and is moved, and the control stalk mounting hole 15a that drives on lining nut 3 and the joystick 15 turns to engagement by disengaging gradually.In the predetermined piston travel stage, lining nut 3 and control stalk mounting hole 15a engagement, sphere flange 15b contacts with the sidewall 5c of cross through hole 5a, moves pull bar 5 to the direction of compressing first spring 7, and brake shoe contacts with wheel.Along with the brake cylinder piston continues to stretch out, joystick 15 continues to drive pull bars 5 and moves and compress first spring 7, the application force that first spring 7 is applied on the adjustment nut 8 is applied to application force on the adjustment nut 8 less than second spring 11, the spring of these two adverse effect power is made a concerted effort and the vehicle foundation brake rigging is delivered to compressive force combined action on the screw rod 12 by screw head 14, force adjustment nut 8 and screw rod 12 to move to first cylindrical shell, 6 directions together, mesh thereby adjustment nut 8 is broken away from the engagement of second cylindrical shell 9 and with first cylindrical shell 6.Because it is identical with screw rod 12 suffered foundation brake compressive force directions that spring is made a concerted effort, in this moving process, adjustment nut 8 does not rotate, and the position between screw rod 12 and the adjustment nut 8 does not change.
Two. brake clearance is greater than the operating mode of normal value: during car brakeing, the brake cylinder piston stretches out, and begins to drive lever and then mobile brake shoe relies on wheel.Control stalk 2 is followed lever and is moved, and the control stalk mounting hole 15a that drives on lining nut 3 and the joystick 15 turns to engagement by disengaging gradually.In the predetermined piston travel stage, lining nut 3 and control stalk mounting hole 15a engagement, sphere flange 15b contacts with the sidewall 5c of cross through hole 5a, moves pull bar 5 to the direction of compressing first spring 7, because brake clearance is greater than normal value, this moment, brake shoe did not contact with wheel.Along with the brake cylinder piston continues to stretch out, joystick 15 continues to drive pull bars 5 and moves and compress first spring 7, the application force that first spring 7 is applied on the adjustment nut 8 is applied to application force on the adjustment nut 8 less than second spring 11, and second spring 11 promotes adjustment nuies 8 and breaks away from engagement with second cylindrical shell 9.Since this moment brake shoe do not contact with wheel yet, so screw rod 12 suffered foundation brake compressive forces make a concerted effort much smaller than spring, so the time adjustment nut 8 can on screw rod 12, rotate; Because second spring 11 is applied to thrust on the screw rod 12 greater than the suffered foundation brake compressive force of screw rod 12, so screw rod 12 stretches out the 3rd cylindrical shell 10 under the promotion of second spring, 11 application forces, the elongation of bidirectional compression type shoe gap adjuster length relies on wheel thereby continue mobile brake shoe.After brake shoe reclined wheel, the compressive force of screw rod 12 suffered foundation brakes increased and is identical with the spring resultant direction, both combineds action, thus promote adjustment nut 8 and 6 engagements of first cylindrical shell.
Three. brake clearance is less than the operating mode of normal value: during car brakeing, the brake cylinder piston stretches out, and begins to drive lever and then mobile brake shoe relies on wheel.Control stalk 2 is followed lever and is moved, and the control stalk mounting hole 15a that drives on lining nut 3 and the joystick 15 turns to engagement by disengaging gradually.Entered predetermined piston travel before the stage, because brake clearance is less than normal value, this moment, brake shoe contacted with wheel, and lining nut 3 and control stalk mounting hole 15a do not mesh.Along with the brake cylinder piston continues to stretch out, screw rod 12 suffered foundation brake compressive forces increase, the compressive force after this increase and second spring 11 are applied to jointly and will be applied to application force on the adjustment nut 8 greater than first spring 7 with joint efforts on the adjustment nut 8, move to the direction of first cylindrical shell 6 together thereby promote adjustment nut 8 and screw rod 12, make the engagement of adjustment nut 8 disengagings and second cylindrical shell 9.But this moment first spring 7 pairs of adjustment nuies 8 application force still greater than the application force of 11 pairs of adjustment nuies 8 of second spring, spring is made a concerted effort opposite with the compressive force direction of screw rod 12 suffered foundation brakes, so the time adjustment nut 8 can on screw rod 12, rotate, screw rod 12 indentations the 3rd cylindrical shell 10 under the effect of foundation brake compressive force, the bidirectional compression type shoe gap adjuster contraction in length.Arrive the predetermined piston travel stage, lining nut 3 and control stalk mounting hole 15a engagement, sphere flange 15b contacts with the sidewall 5c of cross through hole 5a, moves pull bar 5 to the direction of compressing first spring 7.Along with the brake cylinder piston continues to stretch out, joystick 15 continues to drive pull bars 5 and moves and compress first spring 7, the application force that first spring 7 is applied on the adjustment nut 8 is applied to application force on the adjustment nut 8 less than second spring 11, this moment, the compressive force of screw rod 12 suffered foundation brakes was identical with the spring resultant direction, both combineds action, thus adjustment nut 8 and 6 engagements of first cylindrical shell promoted.
Claims (5)
1. bidirectional compression type shoe gap adjuster, mainly by first cylindrical shell (6), second cylindrical shell (9), the 3rd cylindrical shell (10), first spring (7), second spring (11), coupling head (1), control stalk (2), joystick (15), pull bar (5), adjustment nut (8), screw rod (12) and hollow end cap parts such as (13) are formed, and it is characterized in that:
One end of A. described first cylindrical shell (6) links to each other with the afterbody of coupling head (1), the other end of first cylindrical shell (6) is connected with the threaded one end of second cylindrical shell (9), the other end of second cylindrical shell 9 is connected with the threaded one end of the 3rd cylindrical shell (10), and the other end of the 3rd cylindrical shell (10) links to each other with hollow end cap (13);
B. described adjustment nut (8) is positioned at second cylindrical shell (9), on the outer wall of adjustment nut (8) in opposite directions or be arranged with two conical ring faces (8a, 8b), one of them conical ring face (8a) can with the end conical surface (6a) engagement fit of first cylindrical shell (6), another conical ring face (8b) can with the inward flange conical surface (9a) engagement fit of second cylindrical shell (9);
C. described pull bar (5) is positioned at first cylindrical shell (6), one end of pull bar (5) is provided with cross through hole (5a), the other end of pull bar (5) is provided with vertical blind hole (5b), the cross through hole (5a) of pull bar (5) extend out in first cylindrical shell (6) the side direction through hole (1a) that coupling head (1) afterbody offers, and the tail end of vertical blind hole (5b) of pull bar (5) extends to the end face counterbore (8c) of adjustment nut (8) and locates;
D. described screw rod (12) is in first cylindrical shell (6), second cylindrical shell (9) and the 3rd cylindrical shell (10), the thread segment of screw rod (12) screws out from adjustment nut (8) and extend in vertical blind hole (5b) of pull bar (5), and the polished rod section of screw rod (12) is stretched out in the hollow end lid (13) and linked to each other with screw head (14);
The two ends of E. described adjustment nut (8) are provided with the bearing (21) that can be convenient to its rotation, the outside of bearing (21) is provided with trip ring (20), the polished rod section middle part of screw rod (12) is provided with fixedly back-up ring (22), first spring (7) is sleeved on pull bar (5) and goes up, is positioned between the end trip ring (20) and coupling head (1) of adjustment nut (8), and second spring (11) is sleeved on the screw rod (12), be positioned at the other end trip ring (20) of adjustment nut (8) and fixedly between the back-up ring (22); Under the effect of first spring (7) and second spring (11), adjustment nut (8) can move between first cylindrical shell (6) and second cylindrical shell (9), and with first cylindrical shell (6) and second cylindrical shell (9) or engagement or break away from;
One end of F. described joystick (15) is hinged by bearing pin (16) and coupling head (1), the shaft of joystick (15) passes the side direction through hole (1a) of coupling head (1) and the cross through hole (5a) of pull bar (5) simultaneously, and the other end of joystick (15) is provided with control stalk mounting hole (15a); The thread segment of control stalk (2) pass control stalk mounting hole (15a) and with lining nut (3) screw thread fit in control stalk mounting hole (15a), also be provided with the Thrust nut (4) that reclines and cooperate with lining nut (3) on the thread segment of control stalk (2); Driving joystick (15) by control stalk (2) rotates around bearing pin (16), but drive stay (5) moves, thereby adjust first spring (7) and second spring (11) and put on amount of force on the adjustment nut (8), and then control adjustment nut (8) and first cylindrical shell (6) and second cylindrical shell (9) or engagement or disengaging.
2. bidirectional compression type shoe gap adjuster according to claim 1, it is characterized in that: the afterbody of described coupling head (1) is provided with first poted assemblies (17), and first poted assemblies (17) is sleeved on cross through hole (5a) shaft afterwards of pull bar (5); Be provided with second poted assemblies (23) in the described hollow end cap (13), second poted assemblies (23) is sleeved on the shaft of polished rod segment trailer of screw rod (12).
3. bidirectional compression type shoe gap adjuster according to claim 1 and 2 is characterized in that: the thread segment head of described screw rod (12) is provided with axle head circlip (18) and axle head anticreep back-up ring (19).
4. bidirectional compression type shoe gap adjuster according to claim 1 and 2 is characterized in that: the shaft of described joystick (15) is provided with the sphere flange (15b) that cooperates with sidewall (5c) extruding of the cross through hole (5a) of pull bar (5).
5. bidirectional compression type shoe gap adjuster according to claim 3 is characterized in that: the shaft of described joystick (15) is provided with the sphere flange (15b) that cooperates with sidewall (5c) extruding of the cross through hole (5a) of pull bar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920227667XU CN201437367U (en) | 2009-08-26 | 2009-08-26 | Two-way compressing brake shoe slack adjuster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920227667XU CN201437367U (en) | 2009-08-26 | 2009-08-26 | Two-way compressing brake shoe slack adjuster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201437367U true CN201437367U (en) | 2010-04-14 |
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ID=42399349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920227667XU Expired - Lifetime CN201437367U (en) | 2009-08-26 | 2009-08-26 | Two-way compressing brake shoe slack adjuster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201437367U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297222A (en) * | 2011-08-24 | 2011-12-28 | 南车长江车辆有限公司 | Two-way self-adjusting stroke reinforcement brake cylinder |
| CN102381334A (en) * | 2011-08-24 | 2012-03-21 | 南车长江车辆有限公司 | Integrated brake device for bogie of rail wagon |
-
2009
- 2009-08-26 CN CN200920227667XU patent/CN201437367U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297222A (en) * | 2011-08-24 | 2011-12-28 | 南车长江车辆有限公司 | Two-way self-adjusting stroke reinforcement brake cylinder |
| CN102381334A (en) * | 2011-08-24 | 2012-03-21 | 南车长江车辆有限公司 | Integrated brake device for bogie of rail wagon |
| CN102381334B (en) * | 2011-08-24 | 2014-07-09 | 南车长江车辆有限公司 | Integrated brake device for bogie of rail wagon |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhuzhou Kemeng Vehicle Paths Co., Ltd. Assignor: Nanche Changjiang Vehicle Co Ltd|Zhuzhou Kemeng vehicle accessories limited liability company Contract record no.: 2012430000058 Denomination of utility model: Bidirectional compression type shoe gap adjuster Granted publication date: 20100414 License type: Exclusive License Record date: 20120502 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100414 |
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| CX01 | Expiry of patent term |