Accurate brake control device for railway freight locomotive

Abstract

The utility model provides an accurate brake control device of a railway freight locomotive, and belongs to the technical field of brake control of railway freight locomotives. The technical problem to be solved is to provide the improvement of the accurate brake control device structure of the railway freight locomotive. According to the technical scheme, the brake handle comprises a handle rotating shaft, a push-pull rod is arranged in the radial direction of the handle rotating shaft, the axial extending end of the handle rotating shaft sequentially penetrates through the side wall and a cam rotating disc and then is connected with a locomotive brake mechanism, and the handle rotating shaft is fixedly connected with the cam rotating disc. The handle rotating shaft and the cam turntable can synchronously rotate relative to the side wall; the inner side face of the side wall is in contact with the outer side face of the cam rotating disc through a positioning column arranged at the edge position, when the cam rotating disc rotates, the positioning column can form a fan-shaped contact area on the outer side face of the cam rotating disc, and a plurality of limiting grooves are further formed in the contact area of the cam rotating disc; the utility model is applied to brake control of railway freight locomotives.

Description

Technical Field

[0001] The utility model provides a precise braking control device for a railway freight locomotive, belonging to the technical field of braking control for railway freight locomotives. Background Art

[0002] At present, when a railway freight locomotive applies air brakes, it is necessary to push the automatic brake valve handle forward to achieve braking. During operation, there will be an obvious step feeling when pushing the brake valve from the release position to the initial braking position. However, when the braking force is insufficient and additional decompression needs to be applied again, since there is no step setting in the common braking range of the brake valve handle, it is difficult to accurately control the additional decompression amount. If the additional decompression amount is too small, it will cause insufficient braking force. If the additional decompression amount is too large, it may cause longitudinal impulse of the train. Therefore, it is necessary to improve the structure of the current railway freight locomotive braking system to achieve the requirements of precise control. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model aims to solve the technical problem of providing an improved structure of a precise braking control device for a railway freight locomotive.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a precise braking control device for a railway freight locomotive, comprising a brake handle, the brake handle including a handle shaft, a push-pull rod provided along the radial direction of the handle shaft, an axially extending end of the handle shaft passing through a side wall and a cam rotary disk in sequence and then connected to the locomotive brake mechanism, the handle shaft and the cam rotary disk being fixedly connected so that the handle shaft and the cam rotary disk can rotate synchronously relative to the side wall;

[0005] The inner side surface of the side wall contacts the outer side surface of the cam turntable through a positioning column arranged at the edge position. When the cam turntable rotates, the positioning column can form a fan-shaped contact area on the outer side surface of the cam turntable. A plurality of limit grooves are also provided in the contact area of ​​the cam turntable.

[0006] The positioning column is specifically installed in a hole reserved on the inner side of the side wall. A steel ball and a spring are installed inside the positioning column, so that the positioning column can move vertically on the inner side of the side wall.

[0007] Specifically, two positioning posts are provided, and the two positioning posts are respectively provided corresponding to the outer contact area and the inner contact area of ​​the cam disc.

[0008] The limit slots are specifically the emergency brake slot, suppression slot, reconnection slot, maximum common brake slot, initial brake slot, operation slot, and the 20kPa additional decompression slot set in the outer contact area of ​​the cam turntable.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention connects the brake handle coaxially with a cam turntable pre-set with multiple limit grooves, and realizes precise limit control by arranging positioning columns and each limit groove on the inner side of the side wall. When in use, the driver can be given an obvious sense of the level when the additional pressure reduction is 20kPa without changing the driver's operating method, which is convenient for the driver to accurately control the additional pressure reduction when implementing additional pressure reduction under braking conditions, and avoid manually controlling the pressure reduction amount of the brake valve to be too small or too large; the changes made to the original cam turntable module by the present invention are very small, which is convenient for implementation and will not affect the driver's original operating method. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 This is a schematic diagram of the installation effect of the utility model;

[0013] Figure 3 This is a rendering of the arrangement of the limiting grooves of the cam turntable of the utility model;

[0014] In the figure: 1 is the handle shaft, 2 is the push-pull rod, 3 is the side wall, 4 is the cam disc, 31 is the positioning column, and 41 is the limiting groove. DETAILED DESCRIPTION

[0015] like Figures 1 to 3 As shown, the precise braking control device provided by the utility model is specifically installed in the air brake system of a heavy-load locomotive. It can realize precise control of the rotation amplitude of the brake valve handle to avoid applying too little or too much brake decompression, so that the handle can obtain a clear level sense when the additional decompression amount is 20kPa, which is convenient for the driver to accurately control the additional decompression amount when implementing additional decompression under braking conditions.

[0016] To achieve the above-mentioned functional effects, the present invention provides a precise braking control device for a railway freight locomotive, comprising a brake handle, the brake handle comprising a handle shaft 1, a push-pull rod 2 being provided along the radial direction of the handle shaft 1, the axially extending end of the handle shaft 1 passing through a side wall 3 and a cam turntable 4 in sequence, and then connected to the locomotive brake mechanism, the handle shaft 1 and the cam turntable 4 being fixedly connected so that the handle shaft 1 and the cam turntable 4 can rotate synchronously relative to the side wall 3;

[0017] The inner side surface of the side wall 3 contacts the outer side surface of the cam turntable 4 through the positioning column 31 set at the edge position. When the cam turntable 4 rotates, the positioning column 31 can form a fan-shaped contact area on the outer side surface of the cam turntable 4. A plurality of limit grooves 41 are also provided in the contact area of ​​the cam turntable 4.

[0018] The positioning column 31 is specifically installed in a hole reserved on the inner side of the side wall 3 . A steel ball and a spring are installed inside the positioning column 31 so that the positioning column 31 can move vertically on the inner side of the side wall 3 .

[0019] Specifically, two positioning posts 31 are provided, and the two positioning posts are respectively provided corresponding to the outer contact area and the inner contact area of ​​the cam disc 4 .

[0020] Each limit slot 41 is specifically an emergency brake slot, a suppression slot, a reconnection slot, a maximum common brake slot, an initial brake slot, an operation slot, and a 20kPa additional pressure reduction slot arranged in the outer contact area of ​​the cam turntable 4, and the inner contact area of ​​the cam turntable 4.

[0021] like Figure 1 As shown, in an embodiment of the present utility model, the control device is mainly composed of a brake handle, a side wall and its positioning column, and a cam turntable, wherein the side wall is a fixed component and is provided with a mounting hole. The brake handle and the cam turntable are mechanically connected through the mounting hole of the side wall for rigid fixation, and the two can rotate relative to the side wall to realize the rotation of the brake valve handle.

[0022] Further, such as Figure 2 and Figure 3 As shown, a plurality of fixed-angle limit grooves are provided at the edge of the cam turntable, and each limit groove cooperates with the positioning column provided in the side wall to realize the step sense of the brake handle rotating to the operating position, initial braking position, maximum common braking position, reconnection position, inhibition position, and emergency braking position; the positioning column body is a column with external threads, with steel balls and springs installed inside. When the handle is rotated to the limit position of the corresponding groove during use, the positioning column pops up and is stuck in the groove at the corresponding position, so that the driver can quickly and accurately switch to the corresponding brake decompression position when operating the push-pull rod, and accurately control the additional decompression amount of the brake valve.

[0023] Further, such as Figure 3As shown, the angle set between the cam turntable operating position and the initial braking position is 6°, and the angle set between the initial braking position and the maximum commonly used braking position is 30°. According to the calculation that the train pipe decompression at the initial braking position is 50kPa and the maximum commonly used braking position decompression is 170kPa, if 20kPa is used as the additional decompression target value, the corresponding turntable position should be at a position 5° different from the initial braking position; in order to achieve a sense of level when additional decompression braking is required due to insufficient braking force, and to facilitate the driver to accurately control the additional decompression amount, a groove is specifically added at a position 5° different from the initial braking position by the cam turntable, and a positioning column is provided on the side wall to cooperate with it.

[0024] Regarding the specific structure of the present invention, it should be noted that the connection relationship between the various component modules adopted in the present invention is definite and feasible. Except for special instructions in the embodiments, its specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the present invention. The components, modules, models of specific components appearing in the present invention, the installation and connection methods between each other, and the conventional usage methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technology and common knowledge in this field. For example, the specific models, specifications, dimensions and other information of the above-mentioned handle shaft, cam turntable, positioning column, and limit groove do not need to be elaborated, so that the technical solution provided in this case is clear, complete, and feasible, and the corresponding physical products can be reproduced or obtained based on this technical means.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precise braking control device for a railway freight locomotive, comprising a brake handle, characterized in that: The brake handle comprises a handle shaft (1), a push-pull rod (2) is provided along the radial direction of the handle shaft (1), an axially extending end of the handle shaft (1) passes through the side wall (3) and the cam turntable (4) in sequence and is connected to the locomotive brake mechanism, and the handle shaft (1) and the cam turntable (4) are fixedly connected so that the handle shaft (1) and the cam turntable (4) can rotate synchronously relative to the side wall (3); The inner side surface of the side wall (3) contacts the outer side surface of the cam turntable (4) through a positioning column (31) provided at an edge position. When the cam turntable (4) rotates, the positioning column (31) can form a fan-shaped contact area on the outer side surface of the cam turntable (4). A plurality of limiting grooves (41) are also provided in the contact area of ​​the cam turntable (4).

2. The precise braking control device for a railway freight locomotive according to claim 1, characterized in that: The positioning column (31) is specifically installed in a hole reserved on the inner side of the side wall (3), and a steel ball and a spring are installed inside the positioning column (31), so that the positioning column (31) can move vertically on the inner side of the side wall (3).

3. The precise braking control device for a railway freight locomotive according to claim 2, characterized in that: Specifically, two positioning posts (31) are provided, and the two positioning posts are provided corresponding to the outer contact area and the inner contact area of ​​the cam rotary disc (4), respectively.

4. The precise braking control device for a railway freight locomotive according to claim 3, characterized in that: The limit slots (41) are specifically an emergency brake slot, a suppression slot, a reconnection slot, a maximum common brake slot, an initial brake slot, an operation slot, which are arranged in the outer contact area of ​​the cam turntable (4), and a 20kPa additional pressure reduction slot which is arranged in the inner contact area of ​​the cam turntable (4).

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