CN111021159A - Spring clamp device for fixing steel rail damper on steel rail - Google Patents
Spring clamp device for fixing steel rail damper on steel rail Download PDFInfo
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- CN111021159A CN111021159A CN201911351363.9A CN201911351363A CN111021159A CN 111021159 A CN111021159 A CN 111021159A CN 201911351363 A CN201911351363 A CN 201911351363A CN 111021159 A CN111021159 A CN 111021159A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- Structural Engineering (AREA)
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Abstract
The invention relates to a spring clamp device for fixing a steel rail damper on a steel rail, which comprises a back-off spring clamp (3) and a front-off spring clamp (6), wherein the back-off spring clamp (3) and the front-off spring clamp (6) respectively comprise a clamping part for clamping the top surface and the side surface of the damper and a transition arc part for adjusting the clamping force of the clamping part, and the bottoms of the back-off spring clamp (3) and the front-off spring clamp (6) are detachably connected together and fixed at the rail bottom of the steel rail (1). Compared with the prior art, the invention has the advantages of convenient installation and disassembly, adjustable pressing force, practicability, simplicity and the like.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a spring clamp device for fixing a steel rail damper on a steel rail.
Background
While the urban rail transit is rapidly developed, the problems of noise and vibration generated by train operation are increasingly remarkable. The noise pollution of the rail transit is a great part from the vibration of the wheel-rail contact, and for this reason, the rail damper is developed by the scholars to effectively control the noise and the vibration of the wheel-rail. The web of rail is fixed through the additional device between two sleepers all is installed in the design of current most rail dampers, and the train passes through the rail and produces certain vibration, consequently to the additional fixing device installation of attenuator requirement strict, and the restriction of spatial position between rail traffic rail and fastener, rail and the railway roadbed board, will the additional device on the one hand stabilize, reliably fix the safe operation of rail damper in order to ensure the circuit, quick installation and convenient the dismantlement when on the other hand will guarantee the maintenance of rail damper.
The patent CN200610023902.2 discloses a dynamic vibration absorbing multilayer restraint damping rail muffler, which is adhered to both sides of the rail web of the rail by glue. The adhesion method is easy to peel off and is not reliable in long-term operation of the train, so that the vibration reduction efficiency is reduced, the adhesion method is not easy to detach in the later maintenance process, and the maintenance cost is increased.
Patent document CN201220171742.7 discloses a clamp for fixing a rail damper on a rail, which is a symmetric clamp installed in an antisymmetric manner, and has a smart design, but the thickness of a metal card is limited, the clamping force of the rail damper fixed close to the single side of the metal card is unstable, and the clamping force is not adjustable, so that the clamping force is attenuated after long-term use, and the rail damper is not installed firmly.
The patent document CN110485216A discloses a symmetrical clamp for fixing a frequency-modulated steel rail damper on a steel rail, which comprises a first clamping part, a first connecting arc, a second clamping part, a second connecting arc and a third clamping part which are connected in sequence, wherein the first clamping part is in close contact with the upper surface of the frequency-modulated steel rail damper, the protruding part of the second clamping part is in close contact with the side surface of the frequency-modulated steel rail damper, the third clamping part is in close contact with the bottom surface of the steel rail bottom, the frequency-modulated steel rail damper is in close contact with the steel rail bottom and the steel rail waist, the symmetrical clamp is symmetrical about the central axis of the steel rail, the first clamping part is arc-shaped, the clamp is simple, symmetrical and attractive in installation, but the clamp has three defects that ① the clamp cannot be adjusted in installation, once a certain inflection point presses, the elastic force is attenuated or the clamp fails, the whole clamp fails, ② according to the existing design scheme of the prior art, the normal clearance between the clamp and the track has the disadvantages that when the semi-circular clamp is located in a plane, the convex joint is just symmetrical mode, the normal installation of the clamp is just above the normal installation of a semicircular clamp, the normal clamp is just as the normal installation of a special damping round steel rail, and the semi-symmetrical clamp is more than a special damping round steel rail installation and a special damping round steel rail installation technology, the normal clamp is more than a special damping round steel rail installation technology, the normal clamp is more than a special clamp, the normal steel.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the spring clamp device which is convenient to mount and dismount, adjustable in pressing force, practical and simple and is used for fixing the steel rail damper on the steel rail.
The purpose of the invention can be realized by the following technical scheme: the utility model provides a spring clamp device of fixing rail damper on rail which characterized in that, includes left-hand thread spring clamp and right-hand thread spring clamp, left-hand thread spring clamp and right-hand thread spring clamp all contain and press from both sides tight damper top surface and side clamping part to and the transition circular arc portion of adjustment clamping part clamp force, just left-hand thread spring clamp links together with right-hand thread spring clamp detachable bottom, and is fixed in the rail end of the rail.
Furthermore, the bottom of the left-hand side spring clamp is provided with a left-hand side end, the bottom of the right-hand side spring clamp is provided with a lower toe right-hand side end, the lower toe right-hand side end is connected with the left-hand side end, and the left-hand side end and the right-hand side end are matched to form a spring clamp device whole.
Furthermore, the lower toe forward buckling toe end is provided with a longitudinal limiting hole groove, the left toe backward buckling toe end is provided with a longitudinal limiting pin, and the longitudinal limiting pin is in inserting fit with the longitudinal limiting hole groove.
Furthermore, the lower toe forward-buckled toe end is in an outwards-turned arc shape, the left-hand-buckled toe end is in a ring-lacking shape and wraps the arc-shaped lower toe forward-buckled toe end, and the lower toe forward-buckled toe end and the left-hand-buckled toe end are connected through buckling force between the lower toe forward-buckled toe end and the left-hand-buckled toe end. The clamping force can be adjusted by adjusting the curling degree of the circular arc and the ring segment.
Furthermore, the bottoms of the back-off spring clamps are respectively provided with a lower toe clamping part a clamped with the bottom surface of the steel rail, the bottoms of the front-off spring clamps are respectively provided with a lower toe clamping part b clamped with the bottom surface of the steel rail, and the clamping force of the spring clamp device can be adjusted in a stepless mode by changing the lengths of the lower toe clamping parts a and the lower toe clamping parts b.
Furthermore, the end part of the lower toe clamping part a and the end part of the lower toe clamping part b are provided with at least one connecting buckle plate pin hole, a connecting buckle plate with at least two pin shafts is arranged on the connecting buckle plate, and the lower toe clamping part a and the lower toe clamping part b are connected together through the connecting buckle plate. The pin holes are arranged, the length of the clamping device is adjusted according to the requirement of clamping force, and the proper pin holes are selected to be in butt joint with the connecting buckle plate.
Furthermore, at least one of the end part of the lower toe clamping part a and the end part of the lower toe clamping part b is provided with a pin hole, the other one of the end parts of the lower toe clamping part a and the lower toe clamping part b is provided with a corresponding pin shaft, and the left-hand spring clamp and the right-hand spring clamp are connected together through the butt joint of the pin hole and the pin shaft. The pinhole can set up porosely, conveniently adjusts the clamp force.
Furthermore, the clamping parts of the top surface and the side surfaces of the right-handed spring clamp clamping damper comprise an upper toe clamping end and a middle toe clamping part, the transition arc part for adjusting the clamping force of the clamping parts comprises a relaxation arc, an upper end connecting arc and a lower end connecting arc, the upper toe clamping end is tightly contacted with the upper surface of the steel rail damper, and the convex part of the middle toe clamping part is tightly contacted with the side surface of the steel rail damper; wherein the upper toe clamping end, the relaxation arc, the upper end connecting arc, the middle toe clamping part, the lower end connecting arc, the lower toe clamping part and the lower toe forward-buckling toe-buckling end are sequentially connected into a whole;
the clamping part and the transition arc part of the back-buckling spring clamp and the clamping part and the transition arc part of the front-buckling spring clamp are identical in structure.
Furthermore, the upper toe clamping end is a tangent line of the gentle arc along the transverse direction of the steel rail, and the size of the outer contour along the longitudinal direction of the steel rail is 1-400 mm;
the relieving arc, the upper end connecting arc, the middle toe clamping part and the lower end connecting arc are positioned in an orthographic projection area of the lower toe clamping part.
Further, the total range of the connecting length of the lower toes of the back-buckling spring clip and the front-buckling spring clip is 130-150 mm. The clamping force of the spring clamp device is adjusted by changing the length of the lower toe clamping part of the front and back buckling spring clamps.
Furthermore, the spring clamp device is formed by processing a metal material with a circular, triangular or quadrilateral cross section except for the lower toe forward buckling toe end and the reverse buckling toe end.
Compared with the prior art, the invention has the following advantages:
(1) the steel rail damper adopts the spring clamp to clamp the steel rail on the steel rail damper, successfully overcomes the defect that the bonding method is easy to fall off, is easy to disassemble in the later maintenance process, and greatly reduces the maintenance cost;
(2) the upper toe clamping end of the spring clamp is in arc tangent contact, so that the contact area is increased, meanwhile, the positive toe end and the negative toe end are matched into an integral structure, the clamping force is adjustable, and the reliability and the stability of the compression can be better ensured after the spring clamp is installed;
(3) the spring clamp device can be directly made of metal materials with corresponding sizes during manufacturing and processing, and the whole spring clamp can be stabilized by adopting a design structure that the positive and negative buckling toe ends are buckled with each other, so that the spring clamp device cannot rotate and slide in the longitudinal direction of the steel rail.
Drawings
FIG. 1 is an overall sectional view of the steel rail to which the present invention is attached in example 1;
FIG. 2 is a schematic structural view in example 1 of the present invention;
FIG. 3 is an enlarged view of a part of a toe end of the button in example 1 of the present invention;
FIG. 4 is an overall schematic view of the mounting of the spring clip device to the rail damper in accordance with example 1;
FIG. 5 is a schematic structural view in example 2 of the present invention;
FIG. 6 is a partially enlarged view of a fastening hole of the present invention in embodiment 2;
FIG. 7 is an enlarged view of a portion of a connection gusset in embodiment 2 of the invention;
FIG. 8 is a schematic structural view in example 3 of the present invention;
FIG. 9 is a partially enlarged view of a clip in embodiment 3 of the present invention;
the reference numbers in the figures indicate: the steel rail 1, the steel rail damper 2, the left-hand side spring clamp 3, the upper toe clamping end 4, the relieving arc 5, the right-hand side spring clamp 6, the upper end connecting arc 7, the middle toe clamping part 8, the lower end connecting arc 9, the lower toe clamping part b10, the right-hand side toe end 11, the left-hand side toe end 12, the connecting buckle plate 13, the longitudinal limit hole groove 111, the longitudinal limit pin 121, the connecting buckle plate pin hole 112/122, the right-hand side toe end pin shaft 113, the left-hand side toe end pin shaft 121, the left-hand side toe end pin shaft 132, the right-hand side toe end pin shaft 131 and the lower toe clamping part a 14.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
As shown in fig. 1, a spring clip device for fixing a rail damper to a rail includes a reverse-buckling spring clip 3 and a forward-buckling spring clip 6; the left-hand spring clamp 3 and the right-hand spring clamp 6 both comprise clamping parts for clamping the top surface and the side surface of the damper and transition arc parts for adjusting the clamping force of the clamping parts; the clamping part of the right-hand spring clamp 6 for clamping the top surface and the side surface of the damper comprises an upper toe clamping end 4 and a middle toe clamping part 8, the transition arc part for adjusting the clamping force of the clamping part comprises a relaxation arc 5, an upper end connecting arc 7 and a lower end connecting arc 9, the upper toe clamping end 4 is tightly contacted with the upper surface of the steel rail damper 2, and the convex part of the middle toe clamping part 8 is tightly contacted with the side surface of the steel rail damper 2; wherein the upper toe clamping end 4, the moderate arc 5, the upper end connecting arc 7, the middle toe clamping part 8, the lower end connecting arc 9, the lower toe clamping part b10 and the lower toe upright buckle toe end 11 are sequentially connected into a whole; the clamping part and the transition arc part of the left-hand spring clamp 3 and the clamping part and the transition arc part of the right-hand spring clamp 6 are identical in structure. The bottom of each of the back-buckling spring clamps 3 is provided with a lower toe clamping part a14 clamped with the bottom surface of the steel rail 1, the bottom of each of the front-buckling spring clamps 6 is provided with a lower toe clamping part b10 clamped with the bottom surface of the steel rail 1, and the clamping force of the spring clamp device can be adjusted steplessly by changing the lengths of the lower toe clamping parts a14 and the lower toe clamping parts b 10.
3 bottoms of left-hand thread spring clamp be equipped with left-hand thread and detain toe end 12, the 6 bottoms of right-hand thread spring clamp be equipped with down the toe and just detain and detain toe end 11, down the toe just detain and detain toe end 11 and be the circular arc of turning up, left-hand thread detain toe end 12 and be the segmental form to wrap up circular arc down the toe and just detain toe end 11, connect through the buckling power between the two, with left-hand thread spring clamp 3 and right-hand thread spring clamp 6 two parts cooperation constitution spring clamp device whole.
As shown in fig. 2-3, the lower toe positive-fastening toe end 11 is provided with a longitudinal limiting hole groove 111, the left-hand fastening toe end 12 is provided with a longitudinal limiting pin 121, and the longitudinal limiting pin 121 is in inserted fit with the longitudinal limiting hole groove 111, so that the connection between the left-hand fastening spring clip 3 and the right-hand fastening spring clip 6 is firmer and more stable.
The clamping part and the transition circular arc part of the back-buckling spring clamp 3 and the clamping part and the transition circular arc part of the front-buckling spring clamp 6 are the same in structure, two symmetrical upper toe clamping ends 4 are in close contact with the upper surfaces of the two steel rail dampers 2, the convex parts of two symmetrical middle toe clamping parts 8 are in close contact with the side surfaces of the two steel rail dampers 2, and the parts of the lower toe clamping part a14 and the lower toe clamping part b10 except for the front-buckling toe end 11 and the back-buckling toe end 12 are in close contact with the bottom surface of the rail bottom of the steel rail 1. When the steel rail damper is installed, the right-handed spring clamp 6 and the left-handed spring clamp 3 are elastically deformed by applying a certain external force, the right-handed toe end 11 and the left-handed toe end 12 are matched and fastened, and the four connecting arcs provide pressing force of the spring clamps together to enable the two steel rail dampers 2 to be tightly attached to the bottom surfaces of the rail web and the rail bottom of the steel rail 1.
As shown in fig. 2, the cross section of the spring clip device is rectangular, primitive or triangular, the upper toe clamping end 4 and the relieving arc 5 are tangent, and the distance along the longitudinal direction of the steel rail 1 is 400mm at most. The lower toe positive and negative toe ends 11 and 12 are provided with a slot 111 and a detent 121 respectively to cooperate so that the spring clip does not rotate and slide in the longitudinal direction of the rail, as shown in fig. 3. Two pairs of spring clip devices are required to be mounted on each rail damper 2 as shown in figure 4.
In actual installation, a simple tool is needed, three pressing ends of the spring clamp are in a horizontal state, then the two parts of the back-buckling spring clamp 3 and the front-buckling spring clamp 6 of the spring clamp are continuously pressed towards the steel rail damper 2 at the same time until the longitudinal limiting pin 121 at the back-buckling toe end 12 and the longitudinal limiting hole groove 111 at the front-buckling toe end 11 can be smoothly buckled with each other, and then installation is completed.
The spring clamp provides main elastic deformation for the relaxation circular arc 5 and the connecting circular arc in the installation process, and after the installation is finished, the relaxation circular arc 5, the upper end connecting circular arc 7, the lower end connecting circular arc 9, the lower toe forward-buckling toe end 11 and the left-buckling toe end 12 provide pressing force together.
The clamping force can also be adjusted by adjusting the curling degree of the circular arc and the ring segment.
Example 2
As shown in fig. 5, different from embodiment 1, the spring clip eliminates the structure of the fastening toe end, the end of the lower toe clamping part a14 is at least connected with the fastening plate pin hole 122, the end of the lower toe clamping part b10 is at least connected with the fastening plate pin hole 112 (as shown in fig. 6), and the fastening plate 13 is provided with two pins: the left-hand buckle toe pin 132 and the right-hand buckle toe pin 131 (shown in fig. 7) are inserted into the buckle pin hole 122 of the left-hand buckle 3 and the buckle pin hole 112 of the right-hand buckle 6, respectively, and cooperate to connect the two parts into a whole, as shown in fig. 5. The size of the connecting buckle plate is adjustable, the connecting buckle plate can be designed into various sizes according to the clamping force requirement, the distance between the spring clamp devices in the case of the connecting buckle plate and the longitudinal direction of the steel rail is 400mm at most, as shown in figure 7, two sets of spring clamp devices are needed for installing and fixing the steel rail damper, and the installation mode is similar to that of the embodiment 1.
A plurality of pin holes can be further arranged, the length of the clamping device can be adjusted according to the clamping force, and a proper pin hole is selected to be in butt joint with the connecting buckle plate.
Example 3
As seen from fig. 8, unlike the embodiment 1, at least one of the end of the lower toe clamping portion a14 and the end of the lower toe clamping portion b10 is provided with a pin hole, and the other is provided with a corresponding pin shaft, so that the back-buckling spring clamp 3 and the front-buckling spring clamp 6 are connected together through the butt joint of the pin hole and the pin shaft; in this embodiment, the end of the lower toe clamping portion a14 is provided with a connecting buckle plate pin hole 122, the end of the lower toe clamping portion b10 is provided with a forward buckling toe end pin shaft 113, the forward buckling toe end pin shaft 113 is inserted into the connecting buckle plate pin hole 122, so that the two parts of the back buckling spring clamp 3 and the forward buckling spring clamp 6 are connected with the connecting buckle plate pin hole 122 through the forward buckling toe end pin shaft 113, the lower toe clamping portion b10 is in close contact with the rail bottom of the steel rail 1, the size of the forward buckling toe end pin shaft 113 and the diameter of the connecting buckle plate pin hole 122 are designed according to clamping force, as shown in fig. 9, two sets of spring clamp devices are required for installing and fixing the steel rail damper at this.
The pin holes can be provided with multiple holes, and the pin shaft is inserted into different pin holes to adjust the clamping force.
The above embodiments are merely illustrative of the technical solutions of the present invention, and not restrictive, and those skilled in the art may make changes, substitutions, modifications, and simplifications in the spirit of the present invention and equivalent changes without departing from the spirit of the present invention, and shall fall within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a fix spring clamp device on rail with rail attenuator, its characterized in that, includes left-hand thread spring clamp (3) and just detains spring clamp (6), left-hand thread spring clamp (3) and just detain spring clamp (6) all contain and press from both sides tight attenuator top surface and side clamping part to and the transition arc portion of adjustment clamping part clamp force, just left-hand thread spring clamp (3) and just detain spring clamp (6) detachable the linking together in bottom, and be fixed in rail (1) rail bottom.
2. A spring clip device for fixing a rail damper to a rail according to claim 1, wherein the reverse-locking spring clip (3) has a reverse-locking toe end (12) at the bottom thereof, the forward-locking spring clip (6) has a lower-toe forward-locking toe end (11) at the bottom thereof, the lower-toe forward-locking toe end (11) is connected to the reverse-locking toe end (12), and the reverse-locking spring clip (3) and the forward-locking spring clip (6) are combined to form a spring clip device as a whole.
3. A spring clip device for fixing a rail damper to a rail according to claim 2, wherein the lower toe forward fastening toe end (11) is provided with a longitudinal limiting hole groove (111), the reverse fastening toe end (12) is provided with a longitudinal limiting pin (121), and the longitudinal limiting pin (121) is inserted into and matched with the longitudinal limiting hole groove (111).
4. A spring clip device for fixing a rail damper to a rail according to claim 2 or 3, wherein the lower toe forward-fastening toe end (11) is formed in an outward-turned arc shape, and the reverse-fastening toe end (12) is formed in a ring-cut shape and covers the arc-shaped lower toe forward-fastening toe end (11) to be coupled thereto by a fastening force therebetween.
5. The spring clip device for fixing the rail damper on the rail according to claim 1, wherein the bottom of the reverse buckling spring clip (3) is provided with a lower toe clamping part a (14) clamped with the bottom surface of the rail (1), the bottom of the forward buckling spring clip (6) is provided with a lower toe clamping part b (10) clamped with the bottom surface of the rail (1), and the clamping force of the spring clip device can be adjusted steplessly by changing the lengths of the lower toe clamping part a (14) and the lower toe clamping part b (10).
6. A spring clip device for fixing a rail damper to a rail according to claim 5, wherein the lower toe clip part a (14) and the lower toe clip part b (10) are provided with at least one connecting clip pin hole, and a connecting clip (13) having at least two pins is provided thereon, and the lower toe clip part a (14) and the lower toe clip part b (10) are connected together by the connecting clip (13).
7. A spring clip device for fixing a rail damper to a rail according to claim 5, wherein at least one of the end of the lower toe clip part a (14) and the end of the lower toe clip part b (10) is provided with a pin hole, and the other is provided with a corresponding pin shaft, and the back-clinch spring clip (3) and the front-clinch spring clip (6) are connected together by the butt joint of the pin hole and the pin shaft.
8. The spring clamp device for fixing the steel rail damper on the steel rail is characterized in that the clamping parts of the right-hand spring clamp (6) for clamping the top surface and the side surface of the damper comprise an upper toe clamping end (4) and a middle toe clamping part (8), the transitional arc parts for adjusting the clamping force of the clamping parts comprise a relieving arc (5), an upper end connecting arc (7) and a lower end connecting arc (9), the upper toe clamping end (4) is tightly contacted with the upper surface of the steel rail damper (2), and the convex part of the middle toe clamping part (8) is tightly contacted with the side surface of the steel rail damper (2); wherein the upper toe clamping end (4), the moderate arc (5), the upper end connecting arc (7), the middle toe clamping part (8), the lower end connecting arc (9), the lower toe clamping part (10) and the lower toe right-handed buckling toe end (11) are sequentially connected into a whole;
the clamping part and the transition arc part of the back-buckling spring clamp (3) and the clamping part and the transition arc part of the front-buckling spring clamp (6) are identical in structure.
9. A spring clip device for attaching a rail damper to a rail according to claim 8, wherein the toe clip end (4) is a gentle arc (5) tangential to the rail in the transverse direction and has an outer profile of 1-400mm in the longitudinal direction of the rail;
the relieving arc (5), the upper end connecting arc (7), the middle toe clamping part (8) and the lower end connecting arc (9) are positioned in an orthographic projection area of the lower toe clamping part (10).
10. A spring clip device for attaching a rail damper to a rail according to claim 2, wherein the spring clip device is formed of a metal material having a circular, triangular or quadrangular cross section except for the toe end (11) of the lower toe and the toe end (12) of the reverse toe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351363.9A CN111021159A (en) | 2019-12-24 | 2019-12-24 | Spring clamp device for fixing steel rail damper on steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911351363.9A CN111021159A (en) | 2019-12-24 | 2019-12-24 | Spring clamp device for fixing steel rail damper on steel rail |
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| Publication Number | Publication Date |
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| CN111021159A true CN111021159A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911351363.9A Pending CN111021159A (en) | 2019-12-24 | 2019-12-24 | Spring clamp device for fixing steel rail damper on steel rail |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252089A (en) * | 2020-09-29 | 2021-01-22 | 北京九州一轨环境科技股份有限公司 | Rail damper |
-
2019
- 2019-12-24 CN CN201911351363.9A patent/CN111021159A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252089A (en) * | 2020-09-29 | 2021-01-22 | 北京九州一轨环境科技股份有限公司 | Rail damper |
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