CN217081236U - Piston rod rotation-proof structure and buffer - Google Patents
Piston rod rotation-proof structure and buffer Download PDFInfo
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- CN217081236U CN217081236U CN202122991732.XU CN202122991732U CN217081236U CN 217081236 U CN217081236 U CN 217081236U CN 202122991732 U CN202122991732 U CN 202122991732U CN 217081236 U CN217081236 U CN 217081236U
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Abstract
The application discloses piston rod rotation-proof structure and buffer includes: the baffle ring is sleeved at the first end of the piston rod; the first anti-rotation screw is arranged on the baffle ring and penetrates through the baffle ring; the piston rod is provided with a first sliding groove, and a first anti-rotation screw is positioned in the first sliding groove and moves linearly along the axial direction of the piston rod; the first nut is arranged between the periphery of the baffle ring and the shell; the second anti-rotation screw is arranged on the shell and penetrates through the shell; the stop ring is provided with a second sliding groove, and the second anti-rotation screw is positioned in the second sliding groove and moves linearly along the axial direction of the piston rod. The anti-rotation structure adopts two-stage screws to prevent rotation, and has the obvious effects of simple and compact structure and light weight compared with an anti-rotation plate type anti-rotation structure. And the two-stage anti-rotation screw structure is internally arranged, so that the external space of a product is not occupied, and the other functions of the product are not influenced.
Description
Technical Field
The application belongs to the technical field of rail vehicle buffers, and particularly relates to a piston rod anti-rotation structure and a buffer.
Background
The coupler buffer device is arranged at a coupler coupling position between vehicles and is one of the most basic and important parts of the vehicles. In order to adapt to the length of the coupler buffer device, the length of the buffer for the coupler buffer device of the railway vehicle needs to be changed, so that the buffers with the same parameters need to be designed into different lengths. The existing buffer structure generally comprises a buffer core and a piston rod, wherein the length of the piston rod is fixed in the same buffer, and when the buffer structure is matched with different vehicles for use, the buffer core needs to be replaced. In order to ensure the working stability of the damper, the damper core is connected to the piston rod, and then the relative rotation between the damper housing and the piston rod needs to be prevented.
And an anti-rotation structure is arranged between the shell and the piston rod of the buffer. As shown in fig. 1, in the conventional anti-rotation structure, an anti-rotation plate is mounted on a piston rod, a sliding plate seat structure is preset on a shell, the anti-rotation plate extends into the sliding plate seat, and the anti-rotation plate is limited by the sliding plate seat to deflect, so that the aim of preventing the piston rod and the shell from rotating relatively is fulfilled. The anti-rotation structure of the piston is only suitable for scenes with abundant size and space, and along with the increase of the design stroke, the length of the anti-rotation plate is longer and the weight is increased.
Disclosure of Invention
To prior art's not enough, this application provides a piston rod rotation-proof structure and buffer.
The application provides a piston rod rotation-proof structure for connect the casing and the piston rod of buffer, the first end of piston rod stretches into in the casing, include:
the retaining ring is sleeved at the first end of the piston rod;
the first anti-rotation screw is arranged on the retaining ring and penetrates through the retaining ring; the piston rod is provided with a first sliding groove, and the first anti-rotation screw is positioned in the first sliding groove and limited in the first sliding groove to do linear motion along the axial direction of the piston rod;
the first nut is arranged between the periphery of the baffle ring and the shell;
the second anti-rotation screw is arranged on the shell and penetrates through the shell; the stop ring is provided with a second sliding groove, and the second anti-rotation screw is positioned in the second sliding groove and limited in the second sliding groove to do linear motion along the axial direction of the piston rod.
In some embodiments of the present application, the baffle ring includes an annular ring portion, and a flange distributed on the periphery of the ring portion and protruding radially toward the circumference of the ring portion;
the ring part is provided with a first mounting hole for mounting the first anti-rotation screw on the ring part;
the second runner is located on the flange and extends in the axial direction of the first ring portion.
In some embodiments of the present application, the second runner is an open runner.
In some embodiments of the present application, the baffle ring includes a pair of half rings, that is, the baffle ring includes: the first retaining ring and the second retaining ring are of semicircular structures; the first mounting hole and the second sliding groove are arranged on the first retaining ring or the second retaining ring at the same time.
In some embodiments of the present application, the housing has a second mounting hole for the second anti-rotation screw to be mounted on the housing.
In some embodiments of the present application, the number of the second sliding grooves is multiple, and correspondingly, the number of the second anti-rotation screws is the same as the number of the second sliding grooves.
The application further provides a buffer, which comprises a shell, a buffer core and a piston rod, wherein the shell is connected with the piston rod through the piston rod anti-rotation structure.
Compared with the prior art, the beneficial effects of this application do:
according to the anti-rotation structure of the piston rod, the first anti-rotation screw is fixedly connected to the baffle ring through threads, and one end of the first anti-rotation screw extends into the first sliding groove in the piston rod to form a first-stage anti-rotation structure; the second anti-rotation screw is also in threaded connection and fixed on the shell, and one end of the second anti-rotation screw extends into the second sliding groove in the baffle ring to form a second-stage anti-rotation structure. The anti-rotation structure of the piston rod realizes the circumferential fixation among the piston rod, the baffle ring and the shell through the two-stage screw anti-rotation structure, and finally achieves the anti-rotation purpose between the piston rod and the shell.
The application provides an anti-rotating structure adopts the two-stage screw to prevent changeing, prevents changeing the structure relatively to the flitch type, has the obvious effect of simple structure compactness and lightweight. And the two-stage anti-rotation screw structure is internally arranged, so that the external space of a product is not occupied, and the other functions of the product are not influenced. Meanwhile, the anti-rotation key part of the anti-rotation structure does not need to change along with the increase of the design stroke of the piston, and the anti-rotation structure has the advantage of general structure compared with an anti-rotation plate type anti-rotation structure.
Drawings
FIG. 1 is a schematic structural view of an anti-rotation structure of a piston rod in the prior art;
FIG. 2 is a cross-sectional view of one embodiment of a piston rod anti-rotation feature of the present application;
FIG. 3 is a schematic view of a retainer ring according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of a retainer ring according to an embodiment of the present application;
FIG. 5 is a schematic view of a retainer ring according to another embodiment of the present application;
FIG. 6 is a cross-sectional view of a retainer ring according to another embodiment of the present application;
numbering in the figures: 1', a baffle ring; 2', a nut; 3', an anti-rotation plate; 100. a housing; 101. a second mounting hole; 200. a piston rod; 201. a first end; 202. a first chute; 1. a baffle ring; 11. a second chute; 12. a ring portion; 13. a flange; 14. a first mounting hole; 111. a first retainer ring; 112. and a second retaining ring.
Detailed Description
The technical solutions of the present application are explained in detail below with reference to specific embodiments, however, it should be understood that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present application, it is to be understood that the terms "upper", "lower", "bottom", "inner", and the like, as used herein, are intended to refer to the orientation or positional relationship shown in the accompanying drawings, and are used for convenience in describing and simplifying the present invention, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiments described above are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application, and various modifications and improvements made to the technical solutions of the present application by those skilled in the art without departing from the spirit of the present application should fall within the protection scope defined by the claims of the present application. For convenience of description, a side where the anti-creep teeth are located is referred to as a front side, and a side where the mount is located is referred to as a rear side.
As shown in fig. 2 to 4, a shock absorber includes a housing 100 and a piston rod 200, a first end 201 of the piston rod extends into the housing 100, wherein the housing 100 and the piston rod 200 are connected by a piston rod anti-rotation structure provided in a first embodiment of the present application, and the piston rod anti-rotation structure includes:
the baffle ring 1 is sleeved at the first end 201 of the piston rod;
the first anti-rotation screw 2 is arranged on the baffle ring 1 and penetrates through the baffle ring 1; the piston rod 200 is provided with a first sliding groove 202, and the first anti-rotation screw 2 is positioned in the first sliding groove 202 and limited in the first sliding groove 202 to do linear motion along the axial direction of the piston rod 200;
a first nut 3 provided between the outer periphery of the retainer ring 1 and the housing 100;
a second rotation-preventing screw 4 provided on the housing 100 and penetrating through the housing 100; the retainer ring 1 is provided with a second sliding groove 11, and the second anti-rotation screw 4 is located in the second sliding groove 11 and limited in the second sliding groove 11 to move linearly along the axial direction of the piston rod 200.
According to the anti-rotation structure of the piston rod, the first anti-rotation screw is fixedly connected to the baffle ring through threads, and one end of the first anti-rotation screw extends into the first sliding groove in the piston rod to form a first-stage anti-rotation structure; the second anti-rotation screw is also in threaded connection and fixed on the shell, and one end of the second anti-rotation screw extends into the second sliding groove in the baffle ring to form a second-stage anti-rotation structure. The anti-rotation structure of the piston rod realizes the circumferential fixation among the piston rod, the baffle ring and the shell through the two-stage screw anti-rotation structure, and finally achieves the anti-rotation purpose between the piston rod and the shell.
As shown in fig. 3 and 4, the baffle ring 1 includes a ring portion 12 having a ring shape, and a flange 13 distributed on the outer periphery of the ring portion 12 and protruding radially toward the circumference of the ring portion 12;
the ring part 12 is provided with a first mounting hole 14 for mounting the first anti-rotation screw 2 on the ring part 12;
the second runner 11 is located on the flange 13 and extends in the axial direction of the ring portion 12.
Alternatively, as shown in fig. 4, the second chute 11 is an open chute. The arrangement of the opening sliding groove can increase the anti-rotation matching area and improve the anti-rotation effect.
The baffle ring 1 between the piston rod 200 and the housing 100 plays a role in bearing the vertical anti-rotation function, and the first chute 11 is designed on the baffle ring 1, and the second anti-rotation screw 4 from the housing 100 extends into the baffle ring 1, so that the anti-rotation effect of the housing 100 and the baffle ring 1 is realized. The outer cylindrical surface of the piston rod 200 is provided with a first sliding groove 202, and a first anti-rotation screw 2 from the baffle ring 1 extends into the first sliding groove, so that the aim of preventing the piston rod 200 and the baffle ring 1 from rotating is fulfilled.
Alternatively, as shown in fig. 5 and 6, the retainer ring 1 includes a pair of half rings, that is, the retainer ring 1 includes: a first retaining ring 111 and a second retaining ring 112 of a semicircular structure; the first retaining ring and the second retaining ring are generally of an integral structure, and are split into a pair of semicircular structures in order to be conveniently sleeved on the piston rod (in actual conditions, the end part of the piston rod may have a connecting structure such as a protrusion, and the retaining ring of the integral structure cannot be sleeved in from the end part); the first mounting hole 14 and the second sliding groove 11 are simultaneously disposed on the first stopper ring 101 or the second stopper ring 102.
As shown in fig. 2, a second mounting hole 101 is formed in the housing 100 for mounting the second anti-rotation screw 4 on the housing 100.
Optionally, the number of the second sliding grooves 11 is multiple, and correspondingly, the number of the second anti-rotation screws 4 is the same as that of the second sliding grooves 11.
The second embodiment of the present application provides a damper, which includes a housing, a damper core and a piston rod, wherein the housing 100 is connected to the piston rod 200 through the anti-rotation structure of the piston rod according to the first embodiment.
Claims (7)
1. The utility model provides a piston rod rotation-proof structure for connect the casing and the piston rod of buffer, the first end of piston rod stretches into in the casing, its characterized in that includes:
the retaining ring is sleeved at the first end of the piston rod;
the first anti-rotation screw is arranged on the retaining ring and penetrates through the retaining ring; the piston rod is provided with a first sliding groove, and the first anti-rotation screw is positioned in the first sliding groove and limited in the first sliding groove to do linear motion along the axial direction of the piston rod;
the first nut is arranged between the periphery of the baffle ring and the shell;
the second anti-rotation screw is arranged on the shell and penetrates through the shell; the stop ring is provided with a second sliding groove, and the second anti-rotation screw is positioned in the second sliding groove and limited in the second sliding groove to do linear motion along the axial direction of the piston rod.
2. The piston rod anti-rotation structure according to claim 1, wherein the stopper ring includes an annular ring portion and a flange that is distributed around the outer periphery of the ring portion and protrudes radially toward a circumference where the ring portion is located;
the ring part is provided with a first mounting hole for mounting the first anti-rotation screw on the ring part;
the second runner is located on the flange and extends in the axial direction of the ring portion.
3. The piston rod anti-rotation structure according to claim 2, wherein the second sliding groove is an open sliding groove.
4. The piston rod anti-rotation structure according to claim 2, wherein the stopper ring comprises a pair of half rings, that is, the stopper ring comprises: the first retaining ring and the second retaining ring are of semicircular structures; the first mounting hole and the second sliding groove are arranged on the first retaining ring or the second retaining ring at the same time.
5. The anti-rotation structure for a piston rod according to claim 2, wherein a second mounting hole is formed in the housing for mounting the second anti-rotation screw on the housing.
6. The piston rod anti-rotation structure according to claim 2, wherein the number of the second sliding grooves is plural, and correspondingly, the number of the second anti-rotation screws is the same as the number of the second sliding grooves.
7. A damper comprising a housing, a damper core and a piston rod, wherein the housing and the piston rod are connected by a piston rod anti-rotation structure according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122991732.XU CN217081236U (en) | 2021-12-01 | 2021-12-01 | Piston rod rotation-proof structure and buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122991732.XU CN217081236U (en) | 2021-12-01 | 2021-12-01 | Piston rod rotation-proof structure and buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217081236U true CN217081236U (en) | 2022-07-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122991732.XU Active CN217081236U (en) | 2021-12-01 | 2021-12-01 | Piston rod rotation-proof structure and buffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217081236U (en) |
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2021
- 2021-12-01 CN CN202122991732.XU patent/CN217081236U/en active Active
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