CN201800690U - Disk type parking brake device for railway vehicle - Google Patents

Abstract

The utility model relates to a disk type parking brake device for a railway vehicle. The brake device comprises wheel-mounted brake disks, lever-type clamp mechanisms and parking brake devices, wherein the wheel-mounted brake disks are fixed on the both sides of a wheel spoke; and one end of each lever-type clamp mechanism is provided with a brake lining used for clamping one wheel-mounted brake disk and the other end is connected with one parking brake device which is used to drive the lever-type clamp mechanism to open up or clamp. The utility model has the advantages of compact structure, high brake efficiency and convenient assembly, disassembly and maintenance methods; and the utility model can bear higher brake load and is safe and reliable to use.

Description

Disc parking brakes for railway vehicles

technical field

The utility model relates to a brake device, in particular to a disc-type parking brake device for railway vehicles.

Background technique

There are mainly two types of braking methods for existing railway vehicles in my country, namely wheel tread braking and disc braking. Tread braking utilizes brake shoe pressure on the wheel tread to generate frictional resistance to perform the braking function. The disadvantage is that the wear of the wheel is accelerated, and the heat energy generated by friction causes the wheel to crack and peel off. Tread brakes are rarely used at present and tend to be phased out.

According to international railway regulations, when the dynamic brake fails, the mechanical friction brake must ensure that the high-speed train can stop within the specified braking distance to ensure the safety of the train. Therefore, disc-shaped foundation braking is an essential foundation braking method for high-speed trains to finally stop. All adopt disc brake on the high-speed train of countries in the world at present, even also obtain more and more general application on common train disc brake. The disc parking brake device for railway vehicles can not only brake the railway vehicles during operation, but also requires the railway vehicles to be able to perform parking brakes on a certain slope without air pressure, so as to prevent railway vehicles from The vehicle coasts automatically.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a disc for railway vehicles that can not only implement braking during the running process of railway vehicles, but also implement parking brakes on railway vehicles on a certain slope without air pressure. The parking brake device has a compact structure, high braking efficiency, and is easy to disassemble and maintain.

Realize the technical scheme of the utility model as follows:

A disc-type parking brake device for railway vehicles, including a wheel-mounted brake disc, a lever clamp mechanism, and a parking brake device. The wheel-mounted brake disc is fixed on both sides of the wheel spoke plate, and one end of the lever clamp mechanism is equipped The brake pads that clamp and press the wheel-mounted brake discs are connected with the parking brake device that is opened and clamped by the drive lever clamp mechanism at the other end.

The lever clamp mechanism includes two levers and a hanger hinged in the middle of the two levers;

The parking brake device includes a brake cylinder, a parking cylinder and a shaft return mechanism that is movably connected with the lever clamp mechanism. The brake piston, and the intermediate body that is sleeved outside the brake piston and fixedly arranged with the brake cylinder body, a relief spring is arranged between the intermediate body and the brake piston, and the brake piston is connected to the central axis of the shaft return mechanism; The parking cylinder includes a parking cylinder with an air inlet on the left side of the intermediate body, a parking piston is arranged in the parking cylinder, the parking piston is sleeved on the brake piston, and a parking spring is arranged between the parking piston and the intermediate body.

The shaft return mechanism includes a shaft with one end located in the brake piston and the other end exposed to the brake cylinder, and a connector fixedly arranged at the end of the shaft exposed to the brake cylinder. The two levers in the lever clamp mechanism The activity is connected to the connector.

In order to prevent dust from entering the cylinder from the gap between the parking cylinder and the connector, a dust cover is provided between the parking cylinder and the connector, and one end of the dust cover is fixedly arranged on the parking cylinder. The other end is fixedly arranged on the connector.

The shaft is provided with an adjustment mechanism that moves back with the brake piston, and the adjustment mechanism includes a first adjustment sleeve and a second adjustment sleeve sleeved on the shaft. The length that the shaft in the shaft return mechanism protrudes can be regulated by adjusting the adjustment mechanism like this, so as to ensure the frictional pressure between the brake pads in the lever clamp mechanism and the wheel-mounted brake disc.

A parking sleeve is arranged between the parking piston and the brake piston, the parking sleeve is sleeved on the brake piston, and the left end of the brake piston is provided with a limiting protrusion for limiting the parking sleeve.

The brake pads clamp and press the outer side of the wheel-mounted brake disc, and the inner side of the wheel-mounted brake disc is provided with radial cooling ribs. When the railway vehicle brakes, most of the kinetic energy is converted into heat energy through the friction pair of the wheel-mounted brake disc and the brake pad, and the heat dissipation ribs transfer the heat energy to the atmosphere to speed up the heat dissipation.

The ends of the two levers are provided with brake pad holders, and the brake pads are fixedly arranged on the brake pad holders, and the brake pads are pressed against the wheel-mounted brake with the movement of the lever clamp mechanism. Disc friction surface.

Using the above scheme, the brake cylinder pushes the shaft return mechanism and pushes one end of the lever clamp mechanism to open, while the end of the brake pad holder is tightened, and the brake pad is tightly pressed against the high-speed rotating wheel assembly. On the moving disc, it can realize the braking of the running railway vehicles at any time; while parking the cylinder drive shaft return mechanism and pushing the lever clamp mechanism, the brake pads are clamped on the wheel-mounted brake discs, which can make the train run at a speed of 20‰ Parking brakes can be applied on slopes without air pressure to prevent automatic coasting. The utility model has the advantages of compact structure, high braking efficiency, convenient disassembly and maintenance, and can bear relatively large braking load, and is safe and reliable in use.

Description of drawings

Fig. 1 is a working principle diagram of the present utility model;

Fig. 2 is the structural representation of lever clamp mechanism;

Fig. 3 is a schematic structural view of the parking brake device;

In the accompanying drawings, 1, the wheel, 2, the wheel-mounted brake disc, 3, the brake pad, 4, the lever clamp mechanism, 5, the parking brake device, 6, the connecting bolt, 7, the cooling rib, 8, the positioning Pin, 9, brake pad holder, 10, pin shaft, 11, hanger, 12, lever, 121, lever, 13, shaft return mechanism, 14, parking sleeve, 15, adjustment mechanism, 151, first adjustment Cover, 152, the second adjustment sleeve, 16, parking cylinder, 17, parking piston, 18, parking spring, 19, brake cylinder, 20, brake piston, 21, vent plug, 22, intermediate, 23, Axle, 24, connector, 25, dust cover, 26, air inlet, 27, air inlet, 28, release spring, 29, limit projection.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Referring to Figures 1-3, the disc-type parking brake device for railway vehicles includes a wheel-mounted brake disc 2, a lever clamp mechanism 4, and a parking brake device 5. The wheel-mounted brake disc is fixed on the spoke plate of the wheel 1. On both sides, one end of the lever clamp mechanism is equipped with a brake pad 3 that clamps the wheel-mounted brake disc, and the other end is connected with the parking brake device that drives the lever clamp mechanism to open and clamp. The clamp mechanism includes two levers 12, 121 and a hanger 11 hinged in the middle of the two levers; the parking brake device includes a brake cylinder, a parking cylinder and a shaft return mechanism 13 that is movably connected with the lever clamp mechanism, and the brake cylinder includes a set There is a brake cylinder block with an air intake hole 27, a brake piston 20 that is arranged in the brake cylinder body to cooperate with it, and an intermediate body 22 that is sleeved outside the brake piston and fixedly arranged with the brake cylinder block. A relief spring 28 is arranged between the brake pistons 20, and the brake piston 20 is connected to the central axis 23 of the shaft return mechanism; the parking cylinder includes a parking cylinder 16 with an air inlet 26 on the left side of the intermediate body 22, and the parking cylinder is provided with The parking piston 17 is sleeved on the brake piston, and a parking spring 18 is arranged between the parking piston and the intermediate body.

The lever clamp mechanism is mainly made up of parts such as brake pad holder 9, bearing pin 10, hanger 11 and two levers 12,121. The two levers 12, 121 are mounted on the hanger through pins, so that the levers can rotate within a certain range around the pins. The two brake pad holders are respectively installed at the ends of the two levers. The lever clamp mechanism is hoisted on the bogie frame of the railway vehicle through a hanger, which further improves the compactness of the braking device. The lever clamp mechanism can transmit and amplify the thrust of the parking brake device, and convert it into pressure that squeezes the friction surface of the wheel-mounted brake disc to ensure sufficient braking pressure.

The shaft return mechanism includes a shaft 23 with one end positioned in the brake piston and the other end exposed to the brake cylinder, and a connector 24 fixedly arranged on the shaft end exposed to the brake cylinder 19. The two levers 12 in the lever clamp mechanism , 121 are movably connected to the connector 24. The shaft is provided with an adjustment mechanism 15 that moves back with the brake piston. The adjustment mechanism includes a first adjustment sleeve 151 and a second adjustment sleeve 152 sleeved on the shaft. The first adjustment sleeve and the second adjustment sleeve are threaded. connected to the shaft.

A dustproof cover 25 is arranged between the parking cylinder 16 and the connector 24, the dustproof cover is a flexible dustproof cover, one end of the dustproof cover is fixedly arranged on the parking cylinder, and the other end is fixedly arranged on the connector. A parking sleeve 14 is arranged between the parking piston and the brake piston, and the parking sleeve 14 is sheathed on the brake piston, and the left end of the brake piston is provided with a limiting projection 29 for limiting the parking sleeve. The function of the vent plug 21 is to discharge the air on the back side of the brake piston when the brake piston and the parking piston move.

The wheel-mounted brake disc 2 is fastened on both sides of the wheel web through connecting bolts 6 and positioning pins 8. The outer side is the friction working surface, and the inner side is the radially distributed heat dissipation ribs 7. Most of the kinetic energy passes through when the railway vehicle brakes. The friction pair of the wheel-mounted brake disc and the brake pad is converted into heat energy, and the heat energy is transferred to the atmosphere through the heat dissipation ribs to speed up the heat dissipation. The positioning pin mainly plays the role of transmitting friction torque.

The working principle of the utility model: when the fast rail vehicle needs to brake during operation, the control system inputs pressure air to the air intake hole of the brake cylinder, pushes the brake piston to move to the left and drives the second adjustment mechanism in the adjustment mechanism. The sleeve moves together, and the second adjusting sleeve transmits the braking force to the shaft, thereby driving the shaft return mechanism to move to the left and pushing one end of the lever clamp mechanism to open, while the end with the brake pad holder is tightened, which will be installed on the brake The brake pads on the disc holder are tightly pressed against the friction surface of the wheel-mounted brake disc rotating at high speed. At this time, frictional resistance is generated between the wheel-mounted brake disc and the brake pad, so as to realize the braking of the fast track car; when the brake is not needed, the air intake hole on the brake cylinder block will release the pressure air Release, release the spring to return the brake piston, adjustment mechanism and shaft return mechanism to their original positions. During the operation of the fast rail car, the control system inputs pressurized air to the air inlet of the parking cylinder, and the parking piston compresses the parking spring to an energy storage state. When the fast track car needs to be parked and braked, the pressure air is discharged from the air intake hole of the parking cylinder, the parking spring releases energy to push the parking piston to move to the left, the parking piston then pushes the parking sleeve to move to the left, and the parking sleeve drives the brake The piston moves to the left, and the brake piston drives the second adjustment sleeve in the adjustment mechanism to move to the left together, and the second adjustment sleeve transmits the braking force to the shaft, thereby pushing the shaft return mechanism to move outward, and pushing the lever clamp mechanism to implement Brake, this parking brake function can stop on a 20‰ slope to prevent the train from sliding automatically.

Claims (7)

1. rolling stock is with disc type parking brake device, comprise brake disk mounted, the lever-type clamp mechanism of wheel, parking brake device, take turns the brake disk mounted wheel web both sides that are fixedly installed on, be equipped with taking turns the brake disk mounted brake pad that carries out cramping one end of lever-type clamp mechanism, the other end is connected with the parking brake device that the activation lever caliper unit opens, clamps, and it is characterized in that:

The suspension bracket that described lever-type clamp mechanism comprises two levers and is articulated in two levers middle part;

The axle backhaul mechanism that described parking brake device comprises brake cylinder, parks cylinder and flexibly connect with lever-type clamp mechanism, brake cylinder comprises the brake cylinder casing that offers induction opening, is arranged on the brake piston that is mated in the brake cylinder casing and is set in the intermediate that brake piston is outer and brake cylinder casing fixedly installs, be provided with release spring between described intermediate and the brake piston, brake piston adapter shaft backhaul mechanism axis; The described cylinder of parking comprises the cylinder body of parking that intermediate left side has induction opening is set, and parks to be provided with in the cylinder body and parks piston, parks piston bush and is located on the brake piston, parks to be provided with between piston and the intermediate and parks spring.

2. rolling stock according to claim 1 disc type parking brake device, it is characterized in that: described axle backhaul mechanism comprises that an end is positioned at the axle that brake piston, the other end expose brake cylinder casing, and the adaptor union that is fixedly installed on the shaft end that exposes brake cylinder casing, two levers in the described lever-type clamp mechanism are movably connected on the adaptor union.

3. rolling stock according to claim 2 is with disc type parking brake device, and it is characterized in that: described parking between cylinder body and the adaptor union is provided with dust protecting cap, an end of dust protecting cap be fixedly installed on park on the cylinder body, the other end is fixedly installed on the adaptor union.

4. rolling stock according to claim 2 disc type parking brake device is characterized in that: described axle is provided with the regulating mechanism that back moves with brake piston, and described regulating mechanism comprises first regulating sleeve, second regulating sleeve that is set on the axle.

5. rolling stock according to claim 1 disc type parking brake device, it is characterized in that: described park to be provided with between piston and the brake piston park sleeve, park jacket casing and be located on the brake piston, the brake piston left end is provided with and carries out spacing spacing preiection to parking sleeve.

6. rolling stock according to claim 1 disc type parking brake device is characterized in that: the brake disk mounted outside of described brake pad cramping wheel, and take turns brake disk mounted inboard and be provided with radially radiating ribs.

7. rolling stock according to claim 1 disc type parking brake device, it is characterized in that: the end of described two levers is provided with the brake pad holder, and described brake pad is fixedly installed in the brake pad holder.

Images