Bidirectional emergency braking device for coal mine low-speed heavy vehicle

Abstract

The utility model discloses a bidirectional emergency braking device for a coal mine low-speed heavy vehicle, which relates to the technical field of emergency braking, is mounted between two adjacent wheels, and comprises a telescopic oil cylinder, a rocker arm, a braking wedge block and the like, a cylinder body of the telescopic oil cylinder is arranged in a mounting frame, a driving shaft is mounted at the tail end of a telescopic rod of the telescopic oil cylinder, and the rocker arm is connected with the braking wedge block. The rocker arm is composed of S-shaped arms and a short straight arm, the driving shaft is sleeved with top holes of the two S-shaped arms, the S-shaped arms are movably installed in the guide grooves, and the brake wedge block is installed on the short straight arm at the tail end of the rocker arm. Compared with an existing structure, the device only utilizes one telescopic oil cylinder to complete the braking action of the two braking wedge blocks, the two braking wedge blocks can be plugged below two adjacent wheels according to a set track, rolling friction is converted into sliding friction, the wedge blocks can be clamped between the ground and tires along with continuous movement of a vehicle, and emergency braking is completed; the device can work in cooperation with an existing braking system of a vehicle and can also work independently.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency braking, in particular to a bidirectional emergency braking device for low-speed heavy vehicles in coal mines. Background Art

[0002] In the field of trackless transportation in coal mines, wet brakes are generally used in braking systems. Wet brakes generally adopt a closed structure. The brakes are inside the axle or inside the wheel-side reducer. For the early wear of wet brakes, it is impossible to decide whether to replace the brake pads by observing their wear status.

[0003] At present, most users arrange drivers to operate the vehicle and brake when the vehicle is fully loaded, and determine whether the brake disc needs to be replaced based on the braking distance and braking effect, rather than dismantling the wet brake and checking to determine whether to replace it. There is a great hidden danger here. If the vehicle is fully loaded and climbing a slope, once the vehicle's braking system fails and cannot brake in time, the heavily loaded vehicle may collide with the roadway, or collide with other equipment or personnel in the roadway, which will inevitably cause immeasurable consequences.

[0004] In the existing scheme, many trackless transport vehicles are equipped with wedge-shaped sleepers. When the vehicle stops running, the wedge-shaped sleepers are placed under the wheels to lock the wheels for braking. This method is clumsy and inefficient, and requires the driver to place the sleepers under the wheels when stopping. The vehicle cannot be braked during driving.

[0005] How to solve the above technical problems has become a technical challenge in this field. Utility Model Content

[0006] In view of the above technical problems, the utility model provides a bidirectional emergency braking device for low-speed heavy vehicles in coal mines, which can reliably and conveniently place brake wedges under two adjacent wheels to complete emergency braking.

[0007] The utility model solves the above problems through the following technical means:

[0008] A two-way emergency brake device for a low-speed heavy-duty vehicle in a coal mine, installed between two adjacent wheels, characterized in that it comprises an upper support plate, a lower support plate, a protective cover, a mounting frame, a telescopic oil cylinder, a rocker arm and a brake wedge, wherein: the upper support plate and the lower support plate are vertically fixed to the frame, a guide hole is provided in the middle of the upper support plate, and two guide grooves are provided in the middle of the lower support plate; the protective cover is fixed between the upper support plate and the lower support plate; the mounting frame is vertically fixed to the upper surface of the upper support plate, and a positioning hole is provided in the middle of the top of the mounting frame; the telescopic oil cylinder is a two-stage telescopic oil cylinder, the cylinder tail of the telescopic oil cylinder is installed on the outside of the positioning hole by bolts, the cylinder body of the telescopic oil cylinder is arranged inside the mounting frame, the bottom of the cylinder body is arranged in the guide hole, and the end of the telescopic rod of the telescopic oil cylinder is installed with a drive shaft; the rocker arm is composed of an S-shaped arm and a short straight arm, the top holes of the two S-shaped arms are both sleeved on the drive shaft, and the S-shaped arm is movably installed in the guide groove; the brake wedge is installed on the short straight arm at the end of the rocker arm.

[0009] Preferably, the brake wedge block is composed of a right-angle plate and a plurality of triangular plates vertically fixed on the right-angle plate, wherein: a positioning shaft is installed on the side walls of the adjacent triangular plates in the middle, and the positioning shaft is used to hinge the end hole of the short straight arm.

[0010] Preferably, the angle between the S-shaped arm and the short straight arm ranges from 130° to 150°, and the wide section of the guide groove is 1.2 to 1.5 times the width of the S-shaped arm.

[0011] The utility model provides a two-way emergency brake device for low-speed heavy vehicles in coal mines, which has the following beneficial effects:

[0012] The device only utilizes one telescopic oil cylinder to complete the braking action of two brake wedges. The rocker arm adopts the technical solution of S-shaped arm combined with short straight arm. Driven by the telescopic oil cylinder and guided by the guide groove, the S-shaped arm can reliably insert the two brake wedges under the two adjacent wheels according to the set trajectory, converting the rolling friction into sliding friction. As the vehicle continues to move, the wedges can be stuck between the ground and the tires to complete emergency braking. The device can work with the vehicle's existing braking system or independently, effectively solving the technical problem of heavy-loaded vehicles failing to brake in time due to braking system failures, and effectively replacing the clumsy and inefficient manual placement of wedge-shaped sleepers. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is an overall schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the brake wedge structure of the utility model;

[0017] Figure 4 It is the installation diagram of the utility model;

[0018] Figure 5 It is a working schematic diagram of the utility model;

[0019] Figure 6 It is a schematic diagram of a hydraulic implementation scheme of the utility model.

[0020] Among them, 1-upper support plate, 101-guide hole, 2-lower support plate, 201-guide groove, 3-protective cover, 4-mounting frame, 401-positioning hole, 5-telescopic cylinder, 501-cylinder tail, 502-cylinder body, 503-telescopic rod, 504-drive shaft, 6-rocker arm, 601-S-type arm, 602-short straight arm, 7-brake wedge, 701-right angle plate, 702-triangle plate, 703-positioning shaft. DETAILED DESCRIPTION

[0021] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] The present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 6As shown, the two-way emergency brake device for low-speed heavy-duty vehicles in coal mines is installed between two adjacent wheels, and specifically includes an upper support plate 1, a lower support plate 2, a protective cover 3, a mounting frame 4, a telescopic oil cylinder 5, a rocker arm 6 and a brake wedge 7. In the figure, the upper support plate 1 and the lower support plate 2 are vertically fixed to the frame, and the fixing method can be welding or screw connection. A guide hole 101 is opened in the middle of the upper support plate 1, and two guide grooves 201 are opened in the middle of the lower support plate 2. The two guide grooves 201 are arranged in parallel and are staggered by 3cm to 6cm. The protective cover 3 is fixed between the upper support plate 1 and the lower support plate 2. The protective cover 3 is used to protect the oil cylinder from contamination and damage. The mounting frame 4 is vertically fixed to the upper surface of the upper support plate 1, and a positioning hole 401 is opened in the middle of the top of the mounting frame 4.

[0024] In the figure, the telescopic cylinder 5 is a two-stage telescopic cylinder, the cylinder tail 501 of the telescopic cylinder 5 is installed on the outside of the positioning hole 401 by bolts, the cylinder body 502 of the telescopic cylinder 5 is arranged inside the mounting frame 4, the bottom of the cylinder body 502 is arranged in the guide hole 101, and the end of the telescopic rod 503 of the telescopic cylinder 5 is installed with a driving shaft 504; the rocker arm 6 is composed of an S-shaped arm 601 and a short straight arm 602, the top holes of the two S-shaped arms 601 are both mounted on the driving shaft 504, and the S-shaped arm 601 is movably installed in the guide groove 201; the brake wedge block 7 is installed on the short straight arm 602 at the end of the rocker arm 6.

[0025] Specifically, the angle between the S-shaped arm 601 and the short straight arm 602 is in the range of 130° to 150°, and the wide section of the guide groove 201 is 1.2 to 1.5 times the width of the S-shaped arm 601. During actual installation, the two S-shaped arms 601 are symmetrically arranged, and the short straight arms 602 at the ends face outward. When the telescopic rod 503 of the telescopic oil cylinder 5 descends, the driving shaft 504 drives the S-shaped arm 601 to move downward. At this time, the S-shaped arm 601 moves along a predetermined trajectory under the guidance of the guide groove 201 until the brake wedge 7 at the end is inserted into the bottom of the adjacent wheel, as shown in FIG. Figure 4 and Figure 5 shown.

[0026] In this embodiment, the brake wedge block 7 is composed of a right-angle plate 701 and a plurality of triangular plates 702 vertically fixed on the right-angle plate 701, wherein: a positioning shaft 703 is installed on the side wall of the adjacent triangular plates 702 in the middle, and the positioning shaft 703 is used to hinge the end hole of the short straight arm 602. This structure is a lightweight design.

[0027] Figure 6 In the device, the secondary cylinder only needs to be connected to the original vehicle hydraulic part and the original vehicle pneumatic part through the reversing valve, accumulator and one-way valve. The original vehicle pneumatic part is used to control the reversing valve, and the original vehicle hydraulic part is used to provide energy to the accumulator. The user can operate the extension of the two-stage telescopic cylinder through the parking brake button connected to the cab.

[0028] It should be noted that the device only utilizes one telescopic cylinder to complete the braking action of the two brake wedges, and the rocker arm adopts the technical solution of an S-shaped arm combined with a short straight arm. The S-shaped arm can, under the drive of the telescopic cylinder and the guidance of the guide groove, reliably insert the two brake wedges under the two adjacent wheels according to the set trajectory, and convert the rolling friction into sliding friction. As the vehicle continues to move, the wedges can be stuck between the ground and the tires to complete emergency braking. The device can work in conjunction with the vehicle's existing braking system, and can also work independently, effectively solving the technical problem of heavy-loaded vehicles failing to brake in time due to braking system failures, and effectively replacing the clumsy and inefficient manual placement of wedge-shaped sleepers.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A two-way emergency brake device for low-speed heavy vehicles in coal mines, installed between two adjacent wheels, characterized in that: It comprises an upper support plate (1), a lower support plate (2), a protective cover (3), a mounting frame (4), a telescopic oil cylinder (5), a rocker arm (6) and a brake wedge (7), wherein: The upper support plate (1) and the lower support plate (2) are vertically fixed on the vehicle frame; a guide hole (101) is provided in the middle of the upper support plate (1), and two guide grooves (201) are provided in the middle of the lower support plate (2); The protective cover (3) is fixed between the upper support plate (1) and the lower support plate (2); The mounting frame (4) is vertically fixed on the upper surface of the upper support plate (1), and a positioning hole (401) is provided in the middle of the top of the mounting frame (4); The telescopic oil cylinder (5) is a two-stage telescopic oil cylinder. The cylinder tail (501) of the telescopic oil cylinder (5) is mounted on the outside of the positioning hole (401) by means of bolts. The cylinder body (502) of the telescopic oil cylinder (5) is arranged inside the mounting frame (4). The bottom of the cylinder body (502) is arranged in the guide hole (101). The end of the telescopic rod (503) of the telescopic oil cylinder (5) is mounted with a driving shaft (504). The rocker arm (6) is composed of an S-shaped arm (601) and a short straight arm (602), the top holes of the two S-shaped arms (601) are both mounted on the drive shaft (504), and the S-shaped arms (601) are movably mounted in the guide groove (201); The brake wedge (7) is mounted on a short straight arm (602) at the end of the rocker arm (6).

2. The two-way emergency brake device for low-speed heavy vehicles in coal mines according to claim 1 is characterized in that: The braking wedge (7) is composed of a right-angle plate (701) and a plurality of triangular plates (702) vertically fixed on the right-angle plate (701), wherein: A positioning shaft (703) is installed on the side wall of the adjacent triangle plate (702) in the middle, and the positioning shaft (703) is used to hinge the end hole of the short straight arm (602).

3. The two-way emergency brake device for low-speed heavy vehicles in coal mines according to claim 2 is characterized in that: The included angle between the S-shaped arm (601) and the short straight arm (602) ranges from 130° to 150°, and the wide section of the guide groove (201) is 1.2 to 1.5 times the width of the S-shaped arm (601).

Images