CN210889853U

CN210889853U - Railway vehicle brake cylinder and piston assembly thereof

Info

Publication number: CN210889853U
Application number: CN201921983426.8U
Authority: CN
Inventors: 杜霞; 全琼; 冯丽娥; 刘毅; 李果
Original assignee: Meishan CRRC Brake Science and Technology Co Ltd
Current assignee: Meishan CRRC Brake Science and Technology Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-06-30
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a railway vehicle checking cylinder and piston assembly thereof belongs to checking cylinder technical field, and its piston head that mainly adopts the wall thickness restriction in the certain limit to cut down the whole weight of whole piston head, compare in traditional mode, the utility model discloses well piston assembly's whole weight is reduced half, thereby effectively reduces the assembly intensity of labour of checking cylinder, is particularly useful for railway freight train.

Description

Railway vehicle brake cylinder and piston assembly thereof

Technical Field

The utility model relates to a checking cylinder technical field particularly, especially relates to railway vehicle checking cylinder and piston assembly thereof.

Background

The brake cylinder in the brake system of the railway freight car is an execution part during the braking of the car, when the braking action occurs, compressed air enters one side of a rubber sealing part of the brake cylinder, pushes a piston and a piston rod to move towards the braking direction, drives a basic brake device on the car until a brake shoe is attached to a wheel, and completes the braking action.

Disclosure of Invention

To sum up, the utility model discloses the technical problem who solves is: a railway vehicle brake cylinder piston assembly is provided that is less labor intensive to assemble.

And the utility model discloses a solve the scheme that above-mentioned technical problem adopted and be:

railway vehicle brake cylinder piston assembly, including continuous piston head and piston rod, the piston head is the dome form, and its front end inwards caves in and forms the shrinkage pool, it has a plurality of inclined plane strengthening ribs to constitute on the internal face of shrinkage pool, the even interval arrangement of circumference of piston head is followed to the inclined plane strengthening rib, the wall thickness of piston head is 5mm to 8 mm.

Furthermore, the number of the inclined plane reinforcing ribs is 3.

Furthermore, a sealing ring which is used for being in sliding connection with an inner hole of the brake cylinder and forming sealing is sleeved on the periphery of the piston head.

Further, the outer periphery of the piston head is also formed with a fitting groove extending along the circumferential direction thereof, and the seal ring is fitted in the fitting groove.

Furthermore, the outer edge of the front end of the piston head is bent outwards to form a stop edge, and the stop edge forms the wall surface of the front end of the assembling groove.

Furthermore, a leather cup locking ring clamped between the rear end wall surface of the assembling groove and the sealing ring in an interference mode is further included, so that the axial displacement of the sealing ring relative to the piston head is limited.

Further, a first notch is formed on the rear end wall surface of the assembling groove.

Furthermore, the piston rod is tubular and is welded and fixed with the piston head, the rear end of the piston rod is internally accommodated and is in threaded connection with a push rod seat, a spherical concave surface matched with the spherical end of the push rod is formed on the front end surface of the push rod seat, a hexagonal square hole is formed on the rear end surface of the push rod seat, and a ventilation channel communicated with the hexagonal square hole and the spherical concave surface is formed in the push rod seat.

Further, still including spring washer, spring washer is the round cover form that is equipped with centre bore and rear end sunken, the piston rod penetrates in spring washer's centre bore to weld mutually with spring washer, spring washer's rear end terminal surface links to each other with the piston head, the second breach that has its front and back both ends of intercommunication is formed on spring washer's the hole week edge.

The utility model also provides a railway vehicle checking cylinder, it is including checking cylinder hole and the piston assembly of sliding fit in the checking cylinder hole, piston assembly is as above railway vehicle checking cylinder piston assembly.

To sum up, the utility model discloses owing to adopted above-mentioned technical scheme, its beneficial effect includes:

(1) the utility model discloses on traditional cast iron piston basis, adopt the piston head of wall thickness restriction in certain extent to cut down the whole weight of whole piston head, compare in traditional mode, the utility model discloses well piston assembly's whole weight descends half, thereby effectively reduces the assembly intensity of labour of checking jar, is particularly useful for railway freight train.

(2) For thin-walled piston heads, the strength properties are reduced compared to conventional cast iron piston heads, and if not structurally optimized, the piston heads are prone to damage over extended periods of use. So can satisfy the design demand for the performance index of guarantee piston head, the utility model discloses the inclined plane strengthening rib has correspondingly been fashioned in the shrinkage pool of piston head to effectively improve the intensity performance index of piston head.

Drawings

FIG. 1 is a conventional cast iron piston head;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a piston assembly in embodiment 1 of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

fig. 5 is a schematic structural view of a piston head in embodiment 1 of the present invention;

fig. 6 is a schematic rear view of a piston head according to embodiment 1 of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is an enlarged partial view taken at II in FIG. 7;

fig. 9 is a schematic structural view of a push rod seat in embodiment 1 of the present invention;

fig. 10 is a schematic rear view of the putter seat according to embodiment 1 of the present invention;

fig. 11 is a schematic view of a spring washer according to embodiment 1 of the present invention;

fig. 12 is a schematic view of the structure at B-B in fig. 11.

[ Specification of symbols ]

1-a piston head, 2-a piston rod, 3-an inclined plane reinforcing rib, 4-a spring piece mounting seat, 5-a sealing ring, 6-an assembling groove, 7-a butting edge, 8-a leather cup locking ring, 9-a first notch, 10-a push rod seat, 101-a spherical concave surface, 102-a hexagonal square hole, 103-a ventilation channel, 11-a spring washer and 12-a second notch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 2 to 12, the brake cylinder provided by this embodiment 1 includes a brake cylinder inner hole and a piston assembly slidably assembled in the brake cylinder inner hole, the piston assembly includes a piston head 1 and a piston rod 2 connected to each other, the piston head 1 is in a round cap shape, and the front end of the piston head is recessed inwards to form a concave hole, a plurality of inclined reinforcing ribs 3 are formed on the inner wall surface of the concave hole, the inclined reinforcing ribs 3 are uniformly arranged along the circumferential direction of the piston head 1 at intervals, and the wall thickness of the piston head 1 is 5mm to 8 mm.

Compare in traditional cast iron piston head, the piston assembly in the brake cylinder that this embodiment 1 provided has carried out the restriction to the wall thickness of piston head 1 to cut down whole weight of whole piston head 1, compare in the middle of traditional mode, cast iron piston head 20mm above the wall thickness, the utility model discloses piston assembly's whole weight descends half, thereby effectively reduces the assembly intensity of labour of brake cylinder, is particularly useful for railway freight car. More specifically, in this embodiment 1, the piston head 1 is formed by stamping a plate with a wall thickness of 6mm, and the wall thickness is 6mm after the stamping.

Meanwhile, for the thin-wall type piston head 1, compared with the cast iron piston head 1 in the traditional mode, the strength performance is reduced, and if the structure of the cast iron piston head 1 is not optimized, the piston head 1 is easy to damage and fail in the long-term use process. Therefore, in order to ensure that the performance index of the piston head 1 can meet the design requirement, as shown in fig. 5, in this embodiment 1, an inclined-surface reinforcing rib 3 is correspondingly formed in the concave hole of the piston head 1, so as to effectively improve the strength performance index of the piston head 1. In this embodiment 1, the number of the inclined plane reinforcing ribs 3 is 3, and the implementing personnel can specifically select and use the inclined plane reinforcing ribs according to the requirements of the implementing personnel. In addition, in the present embodiment 1, since the inclined plane bead 3 is formed by press molding, as shown in fig. 3, a plurality of recessed regions are formed in the rear end surface of the piston head 1 after the inclined plane bead 3 is formed, and the spring piece attachment seat 4 is welded to each of the recessed regions.

Further, in the present embodiment 1, as shown in fig. 3 and 4, a sealing ring 5 for slidably connecting with the inner hole of the brake cylinder and forming a seal is sleeved on the outer periphery of the piston head 1; meanwhile, an assembly groove 6 extending along the circumferential direction of the piston head 1 is formed in the periphery of the piston head 1, the sealing ring 5 is assembled in the assembly groove 6, the outer edge of the front end of the piston head 1 is bent outwards to form a stopping edge 7, and the stopping edge 7 forms the wall surface of the front end of the assembly groove 6; the structure can effectively ensure the matching stability of the piston head 1 and the inner hole of the brake cylinder. In addition, the abutting edge 7 can be formed by punching together with the concave hole in the punching forming process of the piston head 1, so that the manufacturing period of the piston head 1 is shortened.

Meanwhile, in the present embodiment 1, in order to improve the assembling stability between the assembling groove 6 and the seal ring 5, a cup lock ring 8 is further included, which is inserted into the space between the rear end wall surface of the assembling groove 6 and the seal ring 5 with interference, so as to limit the axial displacement of the seal ring 5 relative to the piston head 1. As shown in fig. 4, in this embodiment 1, a Y-shaped seal ring is specifically adopted, and a lip of the Y-shaped seal ring faces to the rear side, and the cup locking ring 8, in addition to having an axial limiting portion which is clamped between the rear end of the assembling groove 6 and the seal ring 5, further includes a radial limiting portion which extends into the lip of the Y-shaped seal ring and clamps the seal ring 5 together with the outer periphery of the piston head 1, so as to limit the radial displacement of the seal ring 5, thereby improving the installation reliability of the seal ring 5.

In this embodiment 1, as shown in fig. 6 to 8, a first notch 9 is formed on the rear end wall surface of the assembling groove 6, in order to facilitate the removal of the packing cup locking ring 8, which is assembled between the rear end wall surface of the assembling groove 6 and the sealing ring 5 in an interference manner. As shown in the figure, the practitioner can conveniently snap out the cup lock ring 8 at the first notch 9.

In the preferred embodiment, in the present embodiment 1, the piston rod 2 is tubular and welded and fixed to the piston head 1, the rear end of the piston rod 2 is received and screwed with the push rod base 10, the front end surface of the push rod base 10 is formed with a spherical concave surface 101 adapted to the spherical end of the push rod, the rear end surface thereof is formed with a hexagonal square hole 102, and the push rod base 10 is formed with a vent passage 103 communicating the hexagonal square hole 102 and the spherical concave surface 101. As shown in fig. 9 and 10, the vent passage 103 is mainly used to discharge hot air in the hexagonal square hole 102 at the time of welding.

In this embodiment 1, as shown in fig. 3, 11 and 12, the piston rod further includes a spring washer 11, the spring washer 11 is in a shape of a circular cap with a central hole and a concave rear end, the piston rod 2 penetrates into an inner hole of the spring washer 11 and is welded to the spring washer 11, an end face of the rear end of the spring washer 11 is connected to the piston head 1, and a second notch 12 communicating front and rear ends of the inner hole is formed on a peripheral edge of the spring washer 11. Wherein, the spring washer 11 is also manufactured by adopting a stamping process; in a specific assembly link, the brake cylinder buffer spring positioning device mainly plays a role in positioning the brake cylinder buffer spring. And the second gap 12 is used for discharging the treating liquid during the surface treating process of the piston assembly.

Claims

1. Railway vehicle brake cylinder piston assembly, including piston head (1) and piston rod (2) that link to each other, its characterized in that: piston head (1) is the dome form, and its front end inwards caves in and forms the shrinkage pool, it has a plurality of inclined plane strengthening ribs (3) to constitute on the internal face of shrinkage pool, the even interval arrangement of circumference of piston head (1) is followed in inclined plane strengthening rib (3), the wall thickness of piston head (1) is 5mm to 8 mm.

2. A railway vehicle brake cylinder piston assembly as claimed in claim 1, wherein: the number of the inclined plane reinforcing ribs (3) is 3.

3. A railway vehicle brake cylinder piston assembly as claimed in claim 1, wherein: the periphery of the piston head (1) is sleeved with a sealing ring (5) which is used for being in sliding connection with an inner hole of the brake cylinder and forming sealing.

4. A railway vehicle brake cylinder piston assembly as claimed in claim 3, wherein: the periphery of the piston head (1) is further provided with an assembling groove (6) extending along the circumferential direction of the piston head, and the sealing ring (5) is assembled in the assembling groove (6).

5. A railway vehicle brake cylinder piston assembly as claimed in claim 4, wherein: the front end outer edge of the piston head (1) is bent outwards to form a stop edge (7), and the stop edge (7) forms the front end wall surface of the assembling groove (6).

6. A railway vehicle brake cylinder piston assembly as claimed in claim 5, wherein: the piston also comprises a leather cup locking ring (8) which is clamped between the rear end wall surface of the assembling groove (6) and the sealing ring (5) in an interference manner, so that the axial displacement of the sealing ring (5) relative to the piston head (1) is limited.

7. A railway vehicle brake cylinder piston assembly as claimed in claim 6, wherein: a first notch (9) is formed on the rear end wall surface of the assembly groove (6).

8. A railway vehicle brake cylinder piston assembly as claimed in claim 1, wherein: the push rod is characterized in that the piston rod (2) is tubular and is welded and fixed with the piston head (1), a push rod seat (10) is accommodated in the rear end of the piston rod (2) and is in threaded connection with the rear end of the piston rod, a spherical concave surface (101) matched with a spherical end of a push rod is formed on the front end surface of the push rod seat (10), a hexagonal square hole (102) is formed on the rear end surface of the push rod seat, and a ventilation channel (103) for communicating the hexagonal square hole (102) with the spherical concave surface (101) is formed in the push rod seat (10).

9. A railway vehicle brake cylinder piston assembly as claimed in claim 8, wherein: still including spring washer (11), spring washer (11) are the round cover form that is equipped with centre bore and rear end sunken, piston rod (2) penetrate in the centre bore of spring washer (11) to weld mutually with spring washer (11), the rear end terminal surface of spring washer (11) links to each other with piston head (1), the second breach (12) at both ends around it are linked together to the constitution on the hole week edge of spring washer (11).

10. Railway vehicle brake cylinder comprising a brake cylinder bore and a piston assembly slidably mounted in the brake cylinder bore, characterized in that: the piston assembly is a railway vehicle brake cylinder piston assembly as claimed in any one of claims 1 to 9.