MXPA99008571A - Mechanism of release of the brake of hand, activated by a source of ener - Google Patents

Abstract

The present invention relates to a hand-brake automatic release mechanism for a railway vehicle handbrake, the handbrake for railway vehicle comprises a box unit and a mobile cam located within the box unit, the mechanism Hand brake release comprises: (a) a piston unit engageable with the handbrake of the rail vehicle, the piston unit includes a piston rod for outward movement from the piston unit during the activation of a piston in the piston unit: (b) an elongate member having a first end and a second end, the first end is associated with the piston rod at a remote location of the piston unit, such that the elongated member has the capacity to move with respect to the movement of the piston rod, and (c) a release arrow associated with the moving cam within the vehicle hand brake housing unit. or rail, the release arrow being coupled to the second end of the elongate member, such that activation of the piston of the piston unit causes lateral movement of the elongated member resulting from the rotation of the release arrow and the moving cam to automatically release the handbrake of the rail vehicle

Description

MECHANISM OF RELEASE OF THE BRAKE OF HAND, ACTIVATED BY A SOURCE OF ENERGY FIELD OF THE INVENTION The present invention relates, in general, to a hand brake release mechanism for a parking brake unit of a railway vehicle braking system and, more particularly, to a brake release mechanism. of hand activated by a power source for a parking brake unit of a railway vehicle braking system.

BACKGROUND OF THE INVENTION As is well known, in general, in the railroad industry, when railway wagons are separated from a train and parked in a yard, the handbrake or parking brake is applied in at least some of these wagons as a precaution against unwanted or unexpected movement of wagons. A typical rail car hand brake system typically consists of an apparatus for manually applying and pushing one or more brake shoes against the tread of one or more wheels of the rail car, either by rotating a steering wheel or by pumping a wheel handle P1709 / 98MX ratchet in a handbrake mechanism connected to the rail car. As illustrated in Figures 7-9, the hand brake mechanism is usually either a gearbox unit / back plate of cast or die-cast metal, normally connected to an outer end wall of the rail car and having at the same a rotating chain drum, which can be rotated when turning the steering wheel, usually ep clockwise. This rotation is transmitted directly through a drive shaft, a pinion, a gear and a chain drum for winding or winding a brake chain on the chain drum. The other end of the brake chain normally extends through the bottom of the gearbox and is interconnected with cable d with another linkage to the brake pads (not shown) so as to push the brake pads interconnected against each other. the roller bearing surfaces of the adjacent rail car and, accordingly, the hand brake is applied as intended. When the chain offers resistance to the additional rotation of the flywheel, this resistance, which acts back through the drum, the gear and the pinion, causes a nut to move against a wheel member of the wheel.

P1709 / 98MX ratchet that is clamped between the respective friction surfaces on the nut and drive shaft, thereby causing the drive shaft, ratchet wheel and nut to rotate as a unit. A ratchet finger prevents rotation of the ratchet wheel in the opposite direction. The gradual release of the brakes can be done by rotating the steering wheel in the opposite direction, such as in a counterclockwise direction, which loosens or partially releases the nut to reduce the clamping force on the wheel. ratchet. This action allows the pinion and gear to rotate to reduce the chain load and release the brakes. Although rotating the steering wheel in the opposite direction may work to release the handbrake in proportion to the degree of rotation or rotation, some wheel and ratchet systems may not allow the steering wheel to rotate in the opposite direction. In accordance with the foregoing, most hand brake mechanisms are provided with a quick release mechanism, without rotation, which function to quickly and fully release the handbrake without causing the steering wheel or wheel member to rotate. ratchet. The quick release mechanism is usually driven at P1709 / 98 X pivot a hand brake release lever. The handbrake release lever is connected to a brake release arrow which, when rotated by the handbrake release lever outside the gearbox, will uncouple the drum from the chain and secure it in place, thereby allowing the chain to self-assemble from the drum of the chain. Normally, the outer end of the brake release arrow is provided with a lever arm type, without play, of the handbrake release lever, so as to release the handbrake. The lever arm is merely pushed up to rotate the brake release arrow (normally clockwise) as necessary to fully release the parking brake. Regardless of whether the parking brake is released by rotating the steering wheel counterclockwise or by pushing the quick release lever upwards, both techniques require an operator to climb up and down each car to manually activate this release of brakes. This can be a slow and expensive procedure to perform.

P1709 / 98MX SUMMARY OF THE INVENTION It is an object of the invention to provide an automatic hand brake release mechanism of a parking brake unit for a rail vehicle braking system. A further object of the invention is to provide an automatic and energy-activated hand brake release mechanism for a parking braking unit, which allows a quick and economical release of the brakes in each of a selected number of wagons in a railway vehicle. The automatic release mechanism of the handbrake of the invention eliminates the need for train personnel to have to go up and down each railway wagon to manually release the brakes. Another additional object of the invention is to design the mounting system of the quick release lever of the handbrake, in such a way that this lever does not rotate with the activation of the automatic release mechanism of the handbrake of the invention and still allows the activation brake manual in situations where the power source is not available to release the brakes. Another object of the invention is to design the hand brake, in such a way that the quick-release handle remains stationary during the rotation of the arrow of P1709 / 98MX release by the automatic release mechanism of the handbrake of the invention. . Another additional object of the invention is to include a means associated with the quick-release handle that allows manual release of the handbrake by means of the quick-release handle during situations where a power source is not available to drive the automatic release mechanism. of the handbrake of the invention. The mechanism of the invention for automatic release of the energy-activated handbrake comprises a piston unit engageable with the handbrake of the railway vehicle. This piston unit includes a piston arrangement that has a piston rod attached thereto. This piston rod is mounted for outward movement from the piston unit with the activation of a piston in the piston arrangement. An elongate member having a first end and a second end is provided. The first end of this elongate member is associated with the piston rod at a location remote from the piston unit, such that the elongate member has the ability to move with respect to the movement of the piston rod. A release arrow is engageable with the second end of the elongate member, so that the activation of the piston of the P1709 / 98MX piston unit, causes activation of this release arrow to automatically release the hand brake of the rail vehicle. The first end of the elongate member is associated with a lower surface of the piston rod, such that this first end can move in a lateral direction during the vertical movement of the piston rod. This lateral movement of the piston rod causes a rotation force to be applied to the release arrow, which causes the hand brake to release. The hand-operated quick-release lever unit of a railway vehicle hand brake having the inventive energy-powered hand brake release mechanism comprises a handle associated with the release arrow, which remains stationary during the rotational movement of the release arrow by operating the energy-powered handbrake release mechanism, a slice-shaped cake aperture located in the same release arrow or a circular plate member that it is engageable with the release arrow and can rotate with it, and a coupling means engageable with the quick-release handle and extending inside the opening in the form of a slice of cake, in such a way that the manual movement of the maneral P1709 / 98MX quick release to an applied position causes this coupling means to apply a rotational force to the release arrow to cause manual release of the handbrake from the rail vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS OR FIGURES Figure 1 is a front view of the hand brake device having the mechanism of the invention for releasing the hand brake, activated with energy. Figure 2 is a side view of a handbrake device having the mechanism of the invention for releasing the handbrake, energized.

Figure 3 is a rear view of a hand-brake device having the mechanism of the invention for releasing a handbrake, energized, showing the coupling of the elongated member with the piston rod of the piston and the unit and with the release arrow of the handbrake. Figure 4 is an overall view of the hand brake release mechanism of the invention. Figure 5 is a top view of the mechanism P1709 / 98MX hand brake release of the invention. Figure 6 is a cross-sectional view along the line VI-VI of Figure 5, as seen in the direction indicated by the arrows. Figure 7 is a front elevational view, partly in section, of a typical handbrake device without the mechanism of the invention for handbrake release. Figure 8 is an elevation view, in section, taken along line VIII-VIII of Figure 7, as seen in the direction indicated by the arrows. Figure 9 is a sectional view, taken along line IX-IX of Figure 7, as seen in the direction indicated by the arrows. Figure 10 is a schematic view illustrating a release handle arrangement that allows manual activation of the hand brake release mechanism.

DETAILED DESCRIPTION OF THE INVENTION Before proceeding with the more detailed description of the present invention, a description of the manually activated rapid release mechanisms of handbrakes of railway vehicles will prove to be P1709 / 98MX useful for the understanding of the present invention. Also, it should be noted that for reasons of clarity, identical components having identical functions have been identified with the same reference numbers in all the various views illustrated in the Figures of the accompanying drawings. Referring to Figures 7-9, there is shown a railway vehicle hand brake, designated generally 10, of a rail vehicle (not shown). Located in the upper portion of the housing or case 12, there is a quick-release clutch mechanism that can best be seen in Figure 9. The clutch and release mechanism comprises an annular stationary cam member 34 and a movable cam member 36 annular, which can rotate with respect to the stationary cam member 34. An internally slotted clutch collar 38 is provided with an annular flange 40 and concentrically surrounds the drive shaft 18. The collar 38 engages with an externally slotted nut 26, which can be screwed into the threaded portion of the arrow 18 The nut 26 has a flange 42 with an annular friction surface for abutting contact with one side of a ratchet wheel 28, the other side of the ratchet wheel 28 can be butted with a friction surface of a friction plate 44 secured in shape P1709 / 98MX concentric to the arrow 18. The Release Arrow 32 is mounted on bearings in a release arrow bushing secured perpendicularly to the case 12 above the drive mechanism, as shown in Figure 8. A release handle 30 is secured to an outer end of the release arrow 32, while the other end of the release arrow is provided with a release arrow flange 48., which in this way prevents the axial displacement of the arrow. A tab 46 of the fixed release handle on the release handle 30 and a side wall of the box limits the counterclockwise rotation of the release handle 30, while the flange 48 of the release arrow and a side wall of the box limits the clockwise rotation of the release arrow 30 to ensure positive linkage between the release arrow 32 and a mobile cam fork 50 through a pin 51 formed in the arrow 32 and engageable with the fork 50. The quick release of the brake application is effected by manually rotating the release handle 30 (which is normally in the applied position) in a clockwise direction, as shown in Figure 7. , towards a position of liberation, which, P1709 / 98MX by means of the coupling of the pin 51 with the fork 50 of the mobile cam 36, causes the counter-clockwise rotation of the mobile cam 36. As the mobile cam 36 rotates counter-clockwise it moves axially outward with respect to the stationary cam 34, in the upward direction as seen in Figure 9 and carries the clutch collar 38 with it by engaging the flange 40 thereof. This upward axial movement of the movable cam 36 causes the axial disengagement of the clutch collar 38 from the pinion 20, thereby allowing the pinion 20 and the gear 22 to rotate freely to release the load in the chain 24, while the drive shaft 18, the nut 26 and the ratchet wheel 28 are all kept stationary by the ratchet pawl 29. The hand brake release mechanism activated by power source of the present invention, as illustrated in the Figures 1-6, automatically causes the above-described quick release operation, without rotation, to occur by applying a rotational force to the release arrow 32, eliminating the need for an operator to manually rotate the release lever 30 to perform this operation. This handbrake mechanism comprises a unit of P1709 / 98MX piston, generally designated as 60, engageable with handbrake 10 of the rail vehicle. This piston unit 60 can be activated hydraulically or pneumatically. The piston unit 60 comprises a cylindrical housing 60 for housing a piston arrangement, generally designated 64, a piston rod 66 for outward movement of the piston unit 60 with activation of the piston arrangement 64 and a spring 68 to return the piston arrangement 64 and the piston rod 66 to its original position with the deactivation of the piston arrangement 64. The piston arrangement 64 includes a piston 70, a packing cup 72, a piston guide 74, together with a guide ring 76. The rod 66 of the piston can be secured to the piston arrangement 64 by any of the well-known means, such as for example, a hexagonal head / flange bolt unit 78, 79. The housing includes an upper wall 80. The hexagonal head screw 78 can function as a stop means against the inner surface 82 of this upper wall 80 of the housing with the deactivation of the piston 70. The piston unit 60 s can be coupled to the housing 12 of the handbrake of the vehicle by any well-known means, such as for example with a mounting bracket 82 of the cylinder which is secured to a P1709 / 98MX external surface 84 of housing 62 of the cylindrical piston. This bracket includes a wall 86 abutting an end portion of the cylindrical housing 62 and an opening 88 is provided through this wall from which the rod 66 of the piston extends and retracts, with the aid of a bearing 90, with the activation and deactivation of the piston 70. Although Figure 6 shows the wall through which the rod 66 of the piston extends as a component of the bracket 82, it is well known in the art that a lower wall can be provided in the cylindrical housing 62 of the same piston unit 60 and the piston rod 66 can extend through an opening in this wall. Also included within the housing is a sleeve 92 that surrounds a lower portion of the return spring 68. An elongate member 94 is provided, as shown in Figure 3, having a first end 96 and a second end 98. The first end 96 of this elongate member 94 is associated with the rod 66 of the piston at a location that is remote from the piston unit, i.e., the portion of the piston rod 66 that extends through the opening 88. This elongated member 94 has the capability of lateral movement along a lower surface 102 of the piston rod 66 with respect to vertical movement of the piston rod 66.

P1709 / 98MX This lateral movement can be facilitated by the supply of a roller 104 or a cam surface (not shown) at the first end 96 of the elongated member 94 or, alternatively, a roller or cam surface at a lower end of the 66 piston rod. The second end 98 of the elongated member 94 is engageable with the release arrow 32 of the handle 10. This second end 98 can be coupled with the release arrow 32 by any well-known means, such as with a separate, forged mechanical attachment means. or soldier to it, cast as a single component along with it and the like. The elongated member 94 and the release arrow 32 are coupled such that activation of the piston 70 or piston arrangement 64 of the piston unit 60 causes vertical movement of the piston rod 66, which in turn causes the lateral movement of the elongate member 94, and consequently applies a lateral or rotational force to the release arrow 32. This lateral or rotational force applied to the release arrow 32, causes the release arrow 32 to move automatically in a shape such as if the quick release handle 30 had been manually rotated to the release position. Specifically, the activation of the automatic brake release mechanism 60 of the P1709 / 98MX invention causes rotation in a counterclockwise direction of the movable cam 36, such that this movable cam 36 moves axially outward with respect to the stationary cam 34, in an upward direction, carrying the collar 38 Of the clutch. This upward axial movement of the movable cam 36 causes the axial disengagement of the clutch collar 38 from the pinion 20, thereby allowing the pinion 20 and the gear 22 to rotate freely to release the load in the chain 24, so much that the drive shaft 18, the nut 26 and the ratchet wheel 28 are all kept stationary by the ratchet finger 29. The hand brake release mechanism activated by the energy source of the invention can be controlled by a electrically controlled valve, which controls an amount of fluid supplied to the piston unit 60. Any well-known device capable of energizing a solenoid valve can be used to control this amount of fluid applied to the mechanism, such as, for example, a brake computer electronically controlled tires. When using the automatic brake release mechanism of the present invention, it is desirable to design the hand brake system in such a way that the quick release lever 30 remains P1709 / 98 X stationary or does not rotate, when the release arrow 32 is rotated by the automatic hand-release mechanism operated by energy. The unwanted and / or unexpected movement of this quick-release handle 30 with the automatic release of the handbrake could be undesirable. While it is desirable that the handle 30 remain stationary with respect to the rotation of the release arrow by the energy operated release mechanism, the quick release system must be designed in such a way that the quick release handle 30 can even be used for releasing the brakes in a situation where the power source to activate the automatic brake release mechanism of the invention is not readily available. Figure 10 illustrates a design that allows manual release of the brakes with the quick-release handle 30. An aperture 112 is provided in the shape of a slice of cake having first and second side walls, 114 and 115. This aperture in the shape of Cake slice can be provided within the release arrow 32 or within a separate circular plate member (not shown), which is engageable with the release arrow 32. The cake slice-shaped opening has an angle of about 45 cm. -60 °, preferably P1709 / 98MX of approximately 53 °. A coupling means, such as a pin or a leg member 110, is secured to the quick-release handle 30. A portion of the coupling means 110 is positioned within this cake-shaped opening 112. During manual movement of the quick-release handle 30 to an applied position, this coupling means 110 makes contact with the first side wall 114 of the cake-shaped opening and causes the release arrow to rotate to effect manual release. of the hand brake. With the return of the release handle 30 to its initial position, the coupling means 110 makes contact with the second side wall 115 of the cake slice-shaped opening to return the release arrow to a non-applied position. A cover member or lid (not shown) may be located over the opening arrangement in the form of a pie / bolt slice. The automatic brake release mechanism of the present invention provides an ergonomic alternative to a manually operated hand brake release mechanism of the prior art,. since it eliminates the need for the operator to manually activate the release of the brakes on each car. This manual activation can be a slow and expensive procedure to perform.

P1709 / 98 X In this way, the present invention has been described in complete, clear, concise and exact terms to enable any person skilled in the art to which it relates, manufactures and uses it. It will be understood that those skilled in the art can make variants, modifications, equivalents and substitutions of the components of the specifically described embodiments of the invention, without deviating from the spirit and scope of the invention, as set forth in the appended claims.

P1709 / 98MX

Claims (20)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS-1 is claimed as property. An automatic brake release mechanism for a hand brake of a vehicle The hand-brake release mechanism comprises: (a) a piston unit engageable with the handbrake of the rail vehicle, the piston unit includes a piston rod for upward movement from the piston unit with the activation of a piston in the piston unit; (b) an elongate member having a first end and a second end, the first end is associated with the piston rod at a remote location of the piston unit, such that the elongated member has the ability to move with respect to the piston unit. to the movement of the piston rod; and (c) a release arrow engageable with the second end of the elongate member, such that activation of the piston of the piston unit causes activation of the release arrow, to automatically release the handbrake of the rail vehicle. P1709 / 98MX 2. An automatic hand brake release mechanism according to claim 1, wherein the activation of the piston causes the release arrow to turn clockwise to automatically release the handbrake from the rail vehicle. 3. An automatic hand brake release mechanism according to claim 1, wherein the first end of the elongated member includes a roller having the ability of lateral movement along a lower surface of the piston rod, during movement. vertical of the piston rod. 4. An automatic hand brake release mechanism according to claim 3, wherein the lateral movement of the roller causes the elongated member to apply a lateral force to the release arrow, which causes the release arrow to rotate in the direction of the arrows. clock hands to automatically release the handbrake of the rail vehicle. An automatic hand brake release mechanism according to claim 1, wherein the first end of the elongate member includes a cam surface that allows the elongate member to move in a lateral direction with respect to the lower surface of the dipstick. piston during the vertical movement of the piston rod. P1709 / 98MX 6. An automatic hand brake release mechanism according to claim 5, wherein the lateral movement of the elongated member causes a lateral force to be applied to the release arrow which causes the release arrow to turn clockwise, to automatically release the hand brake of the rail vehicle. 7. An automatic hand brake release mechanism according to claim 1, wherein the piston unit is fluid activated. 8. An automatic hand brake release mechanism according to claim 7, wherein the piston unit is activated with air. 9. An automatic hand brake release mechanism according to claim 7, wherein an electrically controlled valve is provided to control the amount of fluid supplied to the piston unit. 10. An automatic hand brake release mechanism according to claim 8, wherein to control the amount of air supplied to the piston unit, an electrically controlled valve is provided. 11. An automatic hand brake release mechanism according to claim 10, wherein for P1709 / 98MX control the electrically controlled valve an electronically controlled computer is provided. 12. An automatic hand-brake release mechanism according to claim 1, including a quick-release handle associated with the release arrow, the quick-release handle having the ability to remain stationary during activation of the release arrow by part of the automatic release mechanism of the parking brake. 13. An automatic brake release mechanism according to claim 12, which includes a slice-shaped opening located in one of the release arrow or a circular plate member engageable with the release arrow, the slice-shaped opening of cake has side walls, first and second, and a means of coupling with the quick-release handle, the coupling means has the ability to engage with the first side wall of the cake-shaped opening during manual movement of the quick-release handle to an applied position to apply a force of rotation to the release arrow that causes manual release of the handbrake of the rail vehicle. 14. An automatic brake release mechanism according to claim 13, wherein the means Coupling P1709 / 98MX has the ability to engage with the second side wall of the cake slice-shaped opening during movement of the quick release handle to an initial position. 15. An automatic hand brake release mechanism according to claim 13, wherein the coupling means comprises a bolt secured to the quick release handle. 16. A manually operated quick-release hand-held unit for the handbrake of a railway vehicle, the handbrake of the railway vehicle includes an energy-powered handbrake release mechanism, to automatically release the handbrake, the Quick release handle unit comprises: (a) a release arrow mounted within the handbrake of the rail vehicle, the release arrow is associated with the energy-operated handbrake release mechanism and mounted for the rotational movement when operating the hand brake release mechanism powered by energy, to automatically release the handbrake; (b) a quick-release handle associated with the release arrow, so that the quick-release handle remains stationary during the P1709 / 98MX rotation movement of the release arrow when operating the handbrake release mechanism, powered by power; (c) a slice-shaped opening of cake located in one of the release arrow or a circular plate member engageable with the release arrow and capable of rotating therewith, the slice-shaped opening of cake has side walls , first and second; and (d) a coupling means engageable with the quick-release handle, the coupling means extends within the slice-shaped opening of cake and has the ability to engage the first side wall of the slice-shaped opening of cake, during the manual movement of the quick-release handle to an applied position to apply a rotation force to the release arrow that causes manual release of the handbrake of the rail vehicle. A manually operated quick-release handle unit according to claim 16, wherein the coupling means has the ability to engage with the second side wall of the cake-shaped aperture during the movement of the quick release handle toward an initial position. P1709 / 98MX 18. A manually operated quick-release handle unit according to claim 16, wherein the cake slice-shaped opening has an angle of about 45-60 °. 19. A manually operated quick release handler unit according to claim 18, wherein the cake slice-shaped opening has an angle of about 53 °. 20. A manually operated quick release handler unit according to claim 16, wherein the coupling means comprises a bolt secured to the quick release handle. P1709 / 98MX SUMMARY OF THE INVENTION A hand-held brake release mechanism is provided by power source to automatically release a parking brake unit from a rail vehicle braking system. The hand brake release mechanism activated by power source includes a hydraulically or pneumatically activated piston unit and including a piston rod mounted to move during activation of a piston within the piston unit. An elongate member is associated with one end of this piston rod, such that it moves laterally with respect to the lower surface of the piston rod during vertical movement of this piston rod. Another end of the elongated member is secured to the release arrow of the handbrake, such that lateral movement of the elongated member causes a rotation force to be applied to the release arrow, which causes the automatic release of the brake. hand. A system is also provided that allows the quick release handle of the handbrake to remain stationary during the application of the rotation force to the release arrow, by the mechanism of the invention of handbrake release activated by power source while maintaining or conserving P1709 / 98MX ability for an operator to manually release the handbrake with this handle, if a power source is not available. P1709 / 98MX