KR100775416B1 - Tread brake unit - Google Patents

Abstract

The present invention relates to a tread braking unit, comprising: a tread braking unit for braking contact with a wheel by using compressed air as a driving source, comprising: a braking cylinder configured to be raised to its original position by a piston spring using the compressed air as a driving source; The yoke bearing of the yoke is in contact with the inclined surface of the piston to freely move the push sleeve, the adjusting nut and the adjusting screw in one direction to correct the amount of wear of the braking shoe caused by the braking friction, thereby always keeping a constant distance from the wheel surface of the wheel. An automatic spacing device configured to maintain; The rear end is in close contact with the front end of the adjustment screw of the automatic spacing adjuster and the front end includes a shoe assembly which generates a braking force by contacting the wheel, and the automatic spacing adjuster is caused by the wear of the braking shoe of the shoe assembly. At the time of pressing, in the direction of the wheel so as to release the individual engagement state between the adjusting screw and the adjusting nut and the guide bush and the spring sleeve at the same time, together with the shoe assembly by the elastic restoring force of the shoe assembly, The adjusting screw moved in the direction of the wheel for braking is restored to the outside of the wheel with respect to the leader nut and the adjusting nut, thereby providing a resetting means for creating a certain space necessary for exchanging the braking shoe between the tread of the wheel and the braking shoe. In order to reduce the number of operations for the replacement of the braking shoe, and to increase the convenience of braking shoe replacement. Tread relates to a brake unit.

Description

Blanking Braking Unit {TREAD BRAKE UNIT}

The present invention relates to a foot brake unit, and more particularly, a reset means is installed at one side of the foot brake unit to engage in a partial movement of the shoe assembly, thereby providing a convenience for the recalibration and replacement of the brake shoe. It is about.

In general, the tread brake unit is a brake device for braking a railway vehicle, as disclosed in Korean Utility Model Publication No. 2000-14730, in which a brake shoe is pressed on the tread of the wheel to brake the vehicle with the frictional force. .

1 to 3 show the general structure of the general foot brake system in different directions. Such a foot brake system includes a piston having a wedge surface 13 in the cylinder chamber 12 above the housing 11. A braking tube (10) installed and lowered by the compressed air supplied to the air inlet (16) on the cylinder control socket (15) side and raised back to its original position by the piston spring (17); (11) It is installed in a direction substantially perpendicular to the piston (14) inside, and when the piston 14 is lowered, the yoke bearing 22 of the yoke 21 contacts and pushes against the wedge surface 13 of the piston 14. An automatic spacing adjuster 20 configured to push the sleeve 23, the adjusting nut 24, and the adjusting screw 25 in one direction, and the rear part is in close contact with the front end of the adjusting screw 25, and the front end thereof contacts the wheel. The shoe assembly 30 generates a braking force.

In the braking cylinder 10, the wedge surface 13 of the piston 14 can be obtained by selectively applying the formed in various angles, a wide range of braking force can be obtained, the conventional braking force is 3.88kgf / ㎠ (≒ 380 kPa = 3.8bar) to 1326.5kgf (≒ 13KN), as well as 3571.4kgf (35KN) can be varied to enable diversification of the braking power of the surface.

In FIG. 4, reference numerals 26 and 26a are rear bearings and bearing pins, respectively, in parallel with the yoke bearings with the wedge surface 13 interposed therebetween, 27 are spring sleeves, 28 and 29 are control sockets and leader nuts, respectively. 31 and 32 are clutch springs and lock washers, 33 and 34 are compression rings and guide bushes, and 36 are return springs.

In the operation of the automatic spacing adjuster 20, the automatic spacing is made upon braking of excessive spacing, which is illustrated in FIGS. 5A and 5B, which explains that the push sleeve 23 has a normal clearance (FIG. 5B). When indicated at 'A', the flange 27a of the spring sleeve 27 is moved to the control socket 28 when moved at an interval equal to the value of the normal spacing for releasing the clutch engagement during braking and loosening. By the push sleeve 23, the tight contact between the spring sleeve 27 and the leader nut 29 is released and the leader nut 29 is forcibly rotated. This rotation continues until the shoe assembly 30 contacts the wheel and a braking force is generated.

When the braking force is obtained, the clutch spring 31 is compressed and tightened between the lock washer 32 and the compression ring 33 and the rear guide bush 34, so that the spline between the lock washer 32 and the leader nut 29 The connection causes the leader nut 29 to no longer work. In addition, the adjustment spring 35 is compressed in the continuous movement of the push sleeve 23 by the elasticity and wear of the continuous braking shoe.

On the other hand, when the braking is released, the push sleeve 23 moves backward by an interval coinciding with the elastic force, and during this movement, the lock washer 32 remains bite and there is no rotation on the automatic interval adjuster 20 side. The spring sleeve 27 moves back by the distance 'A' to its original position with respect to the control socket 28.

Here, when the adjusting screw 25 is stopped by the leader nut 29 and can no longer go back, it forcibly rotates the adjusting nut 24 for subsequent loosening movement. The force required for this is supplied by the return spring 36 and returned at the correct interval.

However, the braking shoe of the above-mentioned pedal brake unit wears out due to friction, so it was necessary to replace the braking shoe or readjust the gap between the braking shoe and the wheel through inspection, and to replace the braking shoe using a separate tool. As a result, a space between the wheel assembly and the shoe assembly with the braking shoe was secured, and the inefficiency of the work of replacing the braking shoe was inherent.

In other words, when the brake shoe is replaced, the adjustment screw 25 is forcibly rotated by using a separate fastening mechanism in order to provide a certain space between the wheel and the shoe assembly with the brake shoe to facilitate the desorption of the brake shoe. At this time, it is difficult to rotate the adjusting screw, and due to the constraints on the space that can be rotated by holding the adjusting screw, it has a disadvantage that the desorption of the brake shoe is so difficult.

The present invention has been made in view of the above problems, the shoe assembly is moved so that the gap between the shoe assembly and the wheel brake of the shoe assembly moved in the wheel direction according to the amount of wear to ensure sufficient space for the replacement of the brake shoe It is an object of the present invention to provide a stepping brake unit having a resetting means for restoring the shoe in the automatic interval adjuster so that the number of steps for the work for replacing the brake shoe is reduced, and the convenience of the work is increased.

In the present invention for achieving the above object, in the tread braking unit for contact braking the wheel with the compressed air as a drive source,

A braking tube installed in a cylinder chamber above the housing, the piston having a wedge surface configured to be raised to its original position by a piston spring serving as a driving source of compressed air supplied to an air inlet on the cylinder control socket side;

It is installed in the housing in a direction orthogonal to the piston. When the piston descends, the yoke bearing of the yoke contacts the wedge surface of the piston and freely moves the push sleeve, the adjusting nut, and the adjusting screw in one direction, resulting in braking friction. An automatic spacing adjuster configured to maintain a constant distance from the tread of the wheel by correcting the amount of wear of the shoe;

The rear portion is in close contact with the front end of the adjustment screw of the automatic spacing adjuster and the front end includes a shoe assembly for generating a braking force in contact with the wheel,

The automatic spacing adjuster,

When the brake shoe is replaced due to the wear of the brake shoe of the shoe assembly, it is pushed in the direction of the wheel to release the individual engagement state between the adjusting screw and the leader nut and the adjusting nut, which are individually screwed together with the guide bush and the spring sleeve. With the shoe assembly by the elastic restoring force of the shoe assembly, the adjusting screw moved in the wheel direction for braking is restored to the outside of the wheel with respect to the leader nut and the adjusting nut, thereby exchanging the braking shoe between the step surface of the wheel and the braking shoe. It characterized in that it comprises a resetting means for creating a certain space necessary for.

Here, the foot brake unit comprises a control socket mounted on one side of the housing, and a reset member protruding from the control socket so as to secure a predetermined space between the shoe assembly and the wheel by inducing the movement of the automatic gap adjuster by a predetermined movement. It is preferred to include a reset means which is an element.

The resetting means may include a reset shaft mounted at one end of the reset member, a reset plunger moved by movement of the reset shaft, and a reset plunger contacting the bearing with the reset plunger to have the same movement, and the tip may be selectively contacted to provide It includes a reset ring for inducing the movement of the adjustment nut, a reset spring mounted between the outer peripheral portion bent to secure the initial position of the reset ring and the automatic spacing adjuster.

1 is a perspective view schematically showing a stepping brake unit according to a preferred embodiment of the present invention;                 

FIG. 2 is a side view schematically showing the inside of the pedal brake unit of FIG. 1; FIG.

3 is a partial cross-sectional view taken along line II-II of FIG. 2;

Figure 4 is an operating state of the automatic spacing controller of Figure 3,

5 is an operational state diagram of the resetting means of FIG.

6 is a view schematically showing a state in which the pedal brake unit according to an embodiment of the present invention is disposed with the wheel,

7 is a perspective view of the pedal brake unit of Figure 6,

8 is a cross-sectional view illustrating the operation of an automatic spacing device when a transient gap occurs along line II-II of FIG. 2;

Figure 9 is a state cross-sectional view showing the operation of the automatic pacemaker during loosening operation,

10 is a sectional view corresponding to FIGS. 9 and 10 showing a second embodiment of the present invention;

Hereinafter, with reference to the accompanying drawings the stepping brake unit according to a preferred embodiment of the present invention will be described in detail.

FIG. 6 is a view schematically showing a state in which the tread braking unit is disposed together with a wheel according to a preferred embodiment of the present invention, FIG. 7 is a perspective view of the tread braking unit of FIG. 6, and FIG. 8 is II- of FIG. 2. FIG. 9 is a cross-sectional view illustrating the operation of the automatic spacer when a transient interval occurs along line II. FIG. 9 is a cross-sectional view illustrating the operation of the automatic spacing regulator in a slow operation. FIG. 10 is a view illustrating a second embodiment of the present invention. And a cross section corresponding to FIG. 9.                 

As can be seen in the figure, the pedal brake unit 100 is provided with a piston 14 having a wedge surface 13 in the cylinder chamber 12 above the housing 11 and supplied through the air inlet 16. A braking cylinder (10) configured to be lowered by compressed air and to be raised back to its original position by a piston spring (26), and installed in the housing (11) at approximately right angles to the piston (14). The rear end is mounted on the front end of the automatic interval adjuster 20 and the adjustment screw 25 configured to move the push sleeve 23, the leader nut 29, and the adjustment screw 25 in one direction by the lowering of the head. The shoe assembly 30 is in close contact with the step surface of the wheel to generate a braking force.

In addition, semi-automatic resetting means including a reset member 53 which is rotated by a predetermined angle with the control socket 51 at the rear of the housing 11 so that the adjustment screw 25 is moved in conjunction with the reader nut 29. 50 is mounted.

Hereinafter will be described the operation of the pedal brake unit according to the present invention.

First, referring to FIG. 8, the compressed air is filled in the cylinder chamber 12 in the relaxed state of the brake to lower the piston 14, and the force generated at this time is pushed by the power distribution device 33. ) And the adjusting screw 25 are moved, and as a result, the shoe assembly 30 is moved to the side of the wheel by the initial application stroke "A (Application stroke)" and braking is started on the vehicle.

As shown in FIG. 8, when compressed air is continuously introduced, the movement of the push sleeve 23 and the adjusting screw 25 is continued, and the floating of the guide bush 34 is carried out through the lock washer 32. Interfering with the rotation prevention of the leader nut (29). As a result, the adjusting screw 25 is moved without rotation, and the braking force is maximized while the elastic deformation stroke "E" generated when the shoe assembly 30 comes into contact with the wheel is compensated.

At this time, the stroke of the adjusting screw 25 becomes A + E.

In addition, when excessive interval “Z” is generated due to wear or other causes of frequent operation of the brake, the adjusting screw 25 may have the leader nut until the shoe assembly 30 contacts the wheel to generate a braking force. Rotation with 29) continues, at which time the movement stroke of the adjusting screw 25 becomes "A + E + Z".

On the other hand, at the time of braking relaxation, when the air in the cylinder chamber 12 is released, the adjusting sleeve 27 is moved backward so as to be in close contact with the adjusting ring 39, and the contact between the leader nut 29 and the guide bush 34 is avoided. Then, the leader nut 29 is also rotated by the force to rotate the adjustment screw 25.

Thus, the adjusting screw 25 is moved to the rear of the unit 100 to compensate for the excessive interval "Z", and if the "Z" is sufficiently compensated, the leader nut 29 and the guide bush 34 are in close contact with each other. The above rotation is prevented, and the space between the shoe assembly 30 and the wheel maintains the interval "A" which is the initial setting interval.

Meanwhile, referring to FIGS. 6 and 9, the replacement of the braking shoe is performed by replacing the braking shoe of the shoe assembly 30 with the force generated when the reset member 53 of the semi-automatic reset means 50 is rotated. As the reset plunger 54 and the reset ring 56 are moved through the reset shaft 52a, the leader nut 29 in contact with the tip of the reset ring 56 is also moved.

When the reset member 53 is returned to its original position, the reset plunger 54 and the reset ring 56 are returned to their original position by the reset spring 55 mounted between the curved outer circumference of the reset ring 56 and the automatic gap adjuster. Shoe assembly 30 is also in place.

When the adjustment nut 24 and the leader nut 29 are rotatable while contact between the leader nut 29 and the adjustment sleeve 27, the guide bush 34 and the leader nut 29 is avoided, the shoe assembly 30 The adjustment screw 25 is rotated by the torsion spring 48 of the crankshaft to move to the rear of the unit 100, and the retracting shoe holder 44, the shoe holder link 46, etc., except for the body 42 are moved. The included shoe assembly 30 is also moved to the rear to secure a predetermined distance between the wheel and the braking shoe, so that the braking shoe is exchanged.

On the other hand, the reset means 50, the control socket 51 for restricting the outward movement of the flange (27a) of the spring sleeve 27, and the cam type reset member rotatably supported by the control socket 51 52 and the tip of the cam-shaped reset member 52 and the needle bearing 57 are selectively contacted with the same movement to induce the movement of the leader nut 29 of the automatic spacing adjuster 20. The reset ring 56 is operated in the principle of screw and nut to maintain the distance between the brake shoe and the wheel face automatically, so that the reset ring 56 is changed in the wheel direction when the brake shoe is replaced. And may be configured to encourage the restoration movement of the adjusting screw (see FIG. 10).

In addition, the coupling between the control socket 51 and the automatic spacing adjuster 20 may be a screw coupling method, as shown in FIG. 10, to be integrated into an engagement using a snap-ring 59 of a predetermined rigidity or more. You may be able to.

The effects of the present invention configured as described above are as follows.

The reset means is installed at the rear of the automatic interval adjuster so that the shoe assembly can be moved by the operation of the reset member, so that the working space for replacing the brake shoe can be easily secured, thereby increasing the work efficiency and working without any tools. Since it can be made, the replacement work time of the braking shoe is shortened and the work maneuver is reduced.

Claims (4)

In a tread braking unit which contacts and brakes a wheel using compressed air as a driving source, A piston 14 having a wedge surface 13 is installed in the cylinder chamber 12 above the housing 11 and lowered by the compressed air supplied to the air inlet 16 on the cylinder control socket 15 side and the piston spring. A braking barrel 10 configured to be raised back to its original position by means of 17; The yoke bearing 22 of the yoke 21 comes into contact with the wedge surface 13 of the piston 14 when the piston 14 is lowered, and is installed in the housing 11 in a direction orthogonal to the piston 14. An automatic gap adjuster 20 configured to push the push sleeve 23, the adjustment nut 24, and the adjustment screw 25 in one direction; The rear end is in close contact with the front end of the adjustment screw 25 and the front end includes a shoe assembly 30 for contacting the wheel to generate a braking force, The automatic spacing adjuster 20, When the brake shoe is replaced due to wear of the brake shoe of the shoe assembly 30, the leader nut 29 and the adjustment nut 24 screwed with the adjustment screw 25, the guide bush 34, and the spring sleeve The adjustment screw 25 moved in the wheel direction for braking is pressed together with the shoe assembly 30 by the elastic restoring force of the shoe assembly 30 so as to simultaneously release the respective engagement state with the shoe assembly 30. By restoring and moving out of the wheel with respect to the leader nut 29 and the adjustment nut 24, it comprises a resetting means 50 for creating a predetermined space for the replacement of the braking shoe between the step surface of the wheel and the braking shoe; , The resetting means 50, A control socket 51 for regulating outward movement of the flange 27a of the spring sleeve 27; A cam type reset member 52 rotatably supported by the control socket 51; The reset ring 56 which is in contact with the cam type reset member 52 and the needle bearing 57 and has the same movement, and the tip thereof is selectively contacted to induce the movement of the leader nut 29 of the automatic gap adjuster 20. Answering brake unit, comprising a. delete The method of claim 1, The resetting means 50, The reset shaft 52a mounted at one end of the cam type reset member 52, the reset plunger 54 moved by the movement of the reset shaft 52a, and the reset plunger 54 are in contact with each other through a bearing. Reset ring 56 having the same movement and the tip is selectively contacted to induce the movement of the adjustment nut 24 of the automatic spacing adjuster 20, and the outer peripheral portion bent to secure the initial position of the reset ring 56 And a reset spring (55) mounted between the automatic spacing adjuster (20). The method of claim 1, The cam-type reset member 52 is a foot brake unit characterized in that the bolt acting as a head for engaging the fastening mechanism.

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