Waterproof ring with mistaken mounting prevention function and brake cylinder

Abstract

The utility model relates to the technical field of vehicle brake cylinders, and particularly discloses a waterproof ring and a brake cylinder with an anti-mistaken-installation function, the waterproof ring comprises a ring body of an annular structure, the ring body comprises an outer ring structure with a V-shaped cross section and an inner ring structure connected with the outer ring structure, and the cross section of the inner ring structure is of a V-shaped structure. The opening of the outer ring structure and the opening of the inner ring structure are arranged on the sides away from each other. The outer ring structure and the inner ring structure are arranged, the included angle is formed between the outer ring structure and the inner ring structure, and meanwhile the outer ring structure and the inner ring structure are respectively arranged to be of a V-shaped structure. Therefore, the inner side and the outer side of the waterproof ring are identical in structure, the inner side and the outer side do not need to be distinguished in the installation process, direct installation is achieved, and working efficiency is improved. Due to the fact that the outer ring structure and the inner ring structure are arranged to be of the V-shaped structure respectively, after long-term use, the outer ring structure and the inner ring structure can still be attached to the piston rod after being abraded, and the inner ring structure is arranged to be of the V-shaped structure so that friction resistance between the inner ring structure and the piston rod can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle brake cylinders, and more specifically to a waterproof ring with a mis-installation prevention function and a brake cylinder. Background Art

[0002] The brake cylinder is a component of the rail vehicle braking system, which is used to convert the internal energy of the air into the kinetic energy of the piston. In the braking condition, the auxiliary air cylinder inflates the brake cylinder through the air control valve, and the pressure inside the brake cylinder increases. When the air pressure is greater than the piston resistance, the piston assembly moves in the braking direction, the piston rod extends, and a thrust is generated. This thrust is transmitted to the brake shoe through the lever, and the brake shoe acts on the wheel tread to achieve the vehicle braking effect; in the relief condition, the brake cylinder exhausts air to the outside through the air control valve, and the pressure inside the brake cylinder is reduced. When the air pressure is less than the sum of the piston resistance and the resistance of the relief spring, the piston assembly moves to the bottom of the cylinder body, the brake shoe is separated from the wheel tread, and the vehicle brake is released.

[0003] During the braking and release process, the piston rod continuously performs an "extend + retract" reciprocating motion. At this time, the inner and outer edges of the waterproof ring are tightly fitted with the piston rod and the waterproof ring seat respectively to prevent rainwater from entering the brake cylinder from the gap, avoiding abnormal situations such as leakage caused by water accumulation and rust inside the brake cylinder, and ensuring driving safety.

[0004] Currently, the existing brake cylinder waterproof ring has no anti-misinstallation structure, its positive and negative shapes are irregular, and its waterproof performance is poor after being installed in the wrong direction. The installation is cumbersome and it is very easy to cause water accumulation inside the brake cylinder. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a waterproof ring and a brake cylinder with a function of preventing mis-installation;

[0006] The solution adopted by the utility model to solve the technical problem is:

[0007] A waterproof ring with an anti-misinstallation function comprises a ring body with an annular structure, wherein the ring body comprises an outer ring structure with a V-shaped cross section, an inner ring structure connected to the outer ring structure and with a V-shaped cross section, and an opening of the outer ring structure and an opening of the inner ring structure are arranged on sides away from each other.

[0008] In some possible implementations,

[0009] The outer ring structure includes an outer ring strip 1 and an outer ring strip 2 connected to the outer ring strip 1 and forming a V structure; the angle formed by the outer ring strip 1 and the outer ring strip 2 is A, and A>90°.

[0010] In some possible implementations,

[0011] The inner ring structure includes an inner ring strip 1 and an inner ring strip 2 connected to the inner ring strip 1 and forming a V structure; the angle formed by the inner ring strip 1 and the inner ring strip 2 is B, and B>90°.

[0012] In some possible implementations,

[0013] The outer ring strip 1 is arranged on the same side as the inner ring strip and forms an angle C, 0°<C<90°;

[0014] The second outer ring strip is arranged on the same side as the inner ring strip and forms an angle D, 0°<D<90°, C=D.

[0015] In some possible implementations,

[0016] 5°<C=D<45°.

[0017] In some possible implementations,

[0018] The outer ring strip 1 and the outer ring strip 2 have the same structure and are symmetrically arranged.

[0019] In some possible implementations,

[0020] The inner ring strip 1 and the inner ring strip 2 have the same structure and are symmetrically arranged.

[0021] A brake cylinder comprises a brake cylinder body with a piston rod, a waterproof ring seat sleeved on the outside of the piston rod, and a waterproof ring sleeved on the outside of the piston rod and as described above; the waterproof ring is arranged between the piston rod and the waterproof ring seat.

[0022] In some possible implementations,

[0023] An annular groove is arranged on one side of the waterproof ring seat close to the piston rod, and the waterproof ring is located in the annular groove and has an interference fit with the annular groove.

[0024] In some possible implementations,

[0025] One end of the piston rod is located inside the brake cylinder body and the other end is located outside the brake cylinder body; the waterproof ring seat is located outside the brake cylinder body;

[0026] The brake cylinder also includes a front cover located outside the brake cylinder body and sleeved on the piston rod, and the front cover is connected to the brake cylinder via bolts.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The utility model sets an outer ring structure and an inner ring structure so that an angle is formed between the two, and sets the outer ring structure and the inner ring structure in a V-shaped structure respectively; thus, the inner and outer structures of the waterproof ring are identical, and it is no longer necessary to distinguish between the inner and outer sides during the installation process, and the waterproof ring can be directly installed; thus, the work efficiency is improved; meanwhile, by setting the outer ring structure and the inner ring structure in a V-shaped structure respectively, after long-term use, the outer ring structure and the inner ring structure can still fit with the piston rod after being worn, so as to increase the service life; and the inner ring structure set in a V-shaped structure can also reduce the friction resistance with the piston rod;

[0029] By arranging the waterproof ring of the utility model in the brake cylinder, during the braking and release process, the piston rod continuously performs "extending + retracting" reciprocating motion. At this time, the inner and outer edges of the waterproof ring are tightly fitted with the piston rod and the waterproof ring seat respectively, so as to prevent rainwater from entering the brake cylinder from the gap, avoid abnormal conditions such as leakage caused by water accumulation and rust inside the brake cylinder, and ensure driving safety;

[0030] The utility model has the advantages of simple structure and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of the waterproof ring of the brake cylinder in the utility model;

[0032] Figure 2 for Figure 1 The enlarged image at point I in the middle;

[0033] Figure 3 It is the main figure of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the brake cylinder in the utility model;

[0035] Among them: 1. Outer ring structure; 11. Outer ring strip one; 12. Outer ring strip two; 2. Inner ring structure; 21. Inner ring strip one; 22. Inner ring strip two; 3. Brake cylinder; 31. Piston rod; 4. Waterproof ring seat; 5. Front cover; 10. Waterproof ring. DETAILED DESCRIPTION

[0036] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0037] The utility model is described in detail below.

[0038] Embodiment 1:

[0039] like Figure 1-Figure 4 As shown, a waterproof ring with an anti-misinstallation function is used in conjunction with the piston rod 31 of the brake cylinder 3, including a ring body with an annular structure and sleeved on the outside of the piston rod 31, the ring body includes an outer ring structure 1 with a V-shaped cross-section, and an inner ring structure 2 connected to the outer ring structure 1 and with a V-shaped cross-section, and the opening of the outer ring structure 1 and the opening of the inner ring structure 2 are arranged on the sides away from each other.

[0040] The cross section of the inner ring structure 2 in the utility model is a V-shaped structure, so that a gap is formed between the inner ring structure 2 and the piston rod 31, thereby reducing the dynamic friction between the two;

[0041] In some possible implementations,

[0042] The outer ring structure 1 includes an outer ring strip 11 and an outer ring strip 2 12 connected to the outer ring strip 11 and forming a V structure; the angle formed by the outer ring strip 11 and the outer ring strip 2 12 is A, and A>90°.

[0043] The inner ring structure 2 includes an inner ring strip 21 and an inner ring strip 22 connected to the inner ring strip 21 to form a V structure; the angle formed by the inner ring strip 21 and the inner ring strip 22 is B, and B>90°.

[0044] Furthermore, an outer connecting strip is provided between the outer ring strip 11 and the outer ring strip 2 12, and an inner connecting strip is provided between the inner ring strip 1 21 and the inner ring strip 22, and the outer connecting strip and the inner connecting strip are connected to each other at one side close to each other to form a whole;

[0045] The two sides of the outer connecting strip are respectively connected to the outer ring strip 11 and the outer ring strip 2 12 in the shape of a ring; the two sides of the inner connecting strip are respectively connected to the inner ring strip 21 and the inner ring strip 22 in the shape of a ring; when it is assembled with the piston rod 31 and the waterproof ring seat 4, the outer ring strip 11 and the outer ring strip 2 12 are respectively abutted against the inner side surface of the annular groove set on the waterproof ring seat 4 and interference fit, the inner ring strip 1 21 and the inner ring strip 22 are tightly fitted with the piston rod 31, and a certain gap will be formed between the inner connecting strip and the outer side surface of the piston rod 31; the two sides described here are both the inner side and the outer side;

[0046] Further, the outer connecting strip is annular, coaxially arranged with the outer ring strip 11 and the outer ring strip 2 12 and connected by an arc transition, and the inner connecting strip is annular and sleeved on the inner side of the outer connecting strip, coaxially arranged with the inner ring strip 1 21 and the inner ring strip 22 and connected by an arc transition;

[0047] After long-term use, the waterproof ring 10 is worn. Due to its good elastic deformation ability and interference fit with the annular groove, it can still fit with the piston rod 31 after wear, preventing rainwater from entering the brake cylinder 3 from this position, thereby increasing the service life;

[0048] In some possible implementations,

[0049] The outer ring strip 11 and the inner ring strip 21 are arranged on the same side and form an angle C, 0°<C<90°;

[0050] The outer ring strip 2 12 and the inner ring strip 1 21 are arranged on the same side and form an angle D, 0°<D<90°, C=D.

[0051] Furthermore, 5°<C=D<45°.

[0052] With this arrangement, the waterproof ring 10 is further installed in the annular groove and has good deformation ability after being sleeved on the piston rod 31, so that the waterproof ring 10 can always fit with the piston rod 31, preventing rainwater from entering the brake cylinder 3, thereby preventing water accumulation in the brake cylinder 3 and causing damage to the brake cylinder 3;

[0053] In some possible implementations, in order to make the waterproof ring 10 not need to be divided into inner and outer sides when assembling the utility model with the piston rod 31 and the waterproof ring seat 4, and directly assemble them to improve the assembly efficiency;

[0054] The outer ring strip 11 and the outer ring strip 2 12 have the same structure and are symmetrically arranged.

[0055] The inner ring strip 1 21 and the inner ring strip 22 have the same structure and are symmetrically arranged.

[0056] It should be noted that the manufacturing method of the waterproof ring 10 includes but is not limited to mechanical processing and mold injection molding.

[0057] Embodiment 2:

[0058] like Figure 1-Figure 4 As shown:

[0059] A brake cylinder 3 includes a brake cylinder 3 body with a piston rod 31, a waterproof ring seat 4 sleeved on the outside of the piston rod 31, and a waterproof ring 10 sleeved on the outside of the piston rod 31 and as described above; the waterproof ring 10 is arranged between the piston rod 31 and the waterproof ring seat 4.

[0060] In some possible implementations,

[0061] An annular groove is provided on one side of the waterproof ring seat 4 close to the piston rod 31 , and the waterproof ring 10 is located in the annular groove and has an interference fit with the annular groove.

[0062] In some possible implementations,

[0063] One end of the piston rod 31 is located inside the brake cylinder 3 and the other end is located outside the brake cylinder 3; the waterproof ring seat 4 is located outside the brake cylinder 3;

[0064] The brake cylinder 3 further comprises a front cover 5 which is located outside the brake cylinder 3 and is sleeved on the piston rod 31 . The front cover 5 is connected to the brake cylinder 3 by bolts.

[0065] Working principle:

[0066] During braking conditions, the auxiliary air cylinder inflates the brake cylinder 3 through the air control valve, and the pressure inside the brake cylinder 3 is increased. When the air pressure is greater than the piston resistance, the piston assembly moves in the braking direction, and the piston rod 31 extends to generate thrust, which is transmitted to the brake shoe through the lever. The brake shoe acts on the wheel tread to achieve the vehicle braking effect.

[0067] In the relief condition, the brake cylinder 3 exhausts air through the air control valve, and the pressure inside the brake cylinder 3 is reduced. When the air pressure is less than the sum of the piston resistance and the relief spring resistance, the piston moves to the bottom of the cylinder, the brake shoe separates from the wheel tread, and the vehicle brakes are released.

[0068] During the braking and release process, the piston rod 31 continuously performs an "extending + retracting" reciprocating motion. At this time, the inner ring structure 2 and the outer ring structure 1 of the waterproof ring 10 are tightly fitted with the piston rod 31 and the waterproof ring seat 4 respectively to prevent rainwater from entering the brake cylinder 3 from the gap, avoid abnormal conditions such as leakage caused by water accumulation and rust inside the brake cylinder 3, and ensure driving safety.

[0069] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A waterproof ring with an anti-misinstallation function, characterized in that: It comprises a ring body with an annular structure, wherein the ring body comprises an outer ring structure with a V-shaped cross section, and an inner ring structure connected to the outer ring structure and with a V-shaped cross section, wherein the opening of the outer ring structure and the opening of the inner ring structure are arranged on sides away from each other.

2. The waterproof ring with anti-misinstallation function according to claim 1, characterized in that: The outer ring structure includes an outer ring strip 1 and an outer ring strip 2 connected to the outer ring strip 1 and forming a V structure; the angle formed by the outer ring strip 1 and the outer ring strip 2 is A, and A>90°.

3. The waterproof ring with anti-misinstallation function according to claim 2, characterized in that: The inner ring structure includes an inner ring strip 1 and an inner ring strip 2 connected to the inner ring strip 1 and forming a V structure; the angle formed by the inner ring strip 1 and the inner ring strip 2 is B, and B>90°.

4. The waterproof ring with anti-misinstallation function according to claim 3, characterized in that: The outer ring strip 1 is arranged on the same side as the inner ring strip and forms an angle C, 0°<C<90°; The second outer ring strip is arranged on the same side as the inner ring strip and forms an angle D, 0°<D<90°, C=D.

5. The waterproof ring with anti-misinstallation function according to claim 4, characterized in that: 5°<C=D<45°.

6. The waterproof ring with anti-misinstallation function according to claim 2, characterized in that: The outer ring strip 1 and the outer ring strip 2 have the same structure and are symmetrically arranged.

7. The waterproof ring with anti-misinstallation function according to claim 3, characterized in that: The inner ring strip 1 and the inner ring strip 2 have the same structure and are symmetrically arranged.

8. A brake cylinder, characterized in that: The invention comprises a brake cylinder body with a piston rod, a waterproof ring seat sleeved on the outside of the piston rod, and a waterproof ring sleeved on the outside of the piston rod and as described in any one of claims 1 to 7; the waterproof ring is arranged between the piston rod and the waterproof ring seat.

9. A brake cylinder according to claim 8, characterized in that: An annular groove is arranged on one side of the waterproof ring seat close to the piston rod, and the waterproof ring is located in the annular groove and has an interference fit with the annular groove.

10. A brake cylinder according to claim 9, characterized in that: One end of the piston rod is located inside the brake cylinder body and the other end is located outside the brake cylinder body; the waterproof ring seat is located outside the brake cylinder body; The brake cylinder also includes a front cover located outside the brake cylinder body and sleeved on the piston rod, and the front cover is connected to the brake cylinder via bolts.

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