RU2444654C1 - Transport facility brake regulator - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: regulator comprises lever that doubles as a case, worm gear including worm wheel and worm arranged in appropriate cavities of said case, mechanism for manual adjustment of clearance in brake including shaft with shaped end arranged aligned with aforesaid worm, and retainer to lock the latter relative to case. Retainer of mechanism for manual adjustment of clearance in brake is fixed in regulator case while mechanism shaft may displace axially. It is spring loaded on worm side and provided with radial tenons. Grooves are made on opposite faces of worm and retainer to receive appropriate tenons of the shaft.

EFFECT: higher reliability due to higher tightness in regulator case cavities.

3 cl, 7 dwg

Description

The invention relates to the field of engineering, namely to brake regulators, and can be used in brake devices of vehicles with pneumatic drive and cam open pads.

A vehicle brake regulator is known, comprising a housing serving as a lever, a worm gear including a worm wheel and a worm located in the respective body cavities, as well as a manual brake clearance adjustment mechanism, including a shaft with a profile shank mounted coaxially with the worm, and a lock for locking the worm relative to the housing [1].

This brake regulator has an extremely low performance. This is due to the fact that the space for placing the latch and the parts accompanying it is very small and it is impossible to place parts in it that would ensure reliable locking of the worm.

A vehicle brake regulator is also known, comprising a housing serving as a lever, a worm gear, including a worm wheel and a worm located in the respective body cavities, as well as a manual brake clearance adjustment mechanism, including a shaft with a profile shank mounted coaxially with the worm, and a lock for locking the worm relative to the body [2].

A disadvantage of the known controller is that the latch for locking the worm is mounted axially in the housing and has a complex outer surface. Sealing the internal cavities of the housing, in this case, is very difficult, and the penetration of dirt from the outside into the housing destroys the regulator.

An object of the present invention is to eliminate these drawbacks, i.e. improving the reliability of the brake regulator by ensuring the tightness of the internal cavities of the regulator body.

This problem is solved due to the fact that in the vehicle’s brake regulator containing a housing serving as a lever, a worm gear including a worm wheel and a worm located in the respective body cavities, as well as a manual brake clearance adjustment mechanism, including a shaft with a profile shank mounted coaxially with a worm, and a latch for locking the worm relative to the housing, a latch for the manual clearance adjustment mechanism is fixed in the regulator housing, and the shaft of the said mechanism is installed axially movable, spring-loaded on the side of the worm and provided with radial spikes, while radial grooves are made on the mutually facing ends of the worm and the retainer, in which the corresponding shaft spikes are placed.

Each radial shaft spike can be made in the form of two pins, one of which is located in the groove of the worm, and the other in the groove of the retainer.

Radial shaft spikes located in the grooves of the worm and located in the grooves of the retainer can be in mutually perpendicular planes.

Figure 1 shows the brake regulator with a local section along the axis of the worm of the worm gear; figure 2 - details of the mechanism for manual adjustment of the gap in the spatial image; figure 3 shows the position of the parts of the mechanism for manual adjustment of the gap during manual adjustment of the brake; figure 4 shows the details of the brake regulator when the radial shaft spikes are made in the form of pins; figure 5 shows the mechanism for manual adjustment of the gap with the location of the pins in mutually perpendicular planes; figure 6 shows the same as figure 5, but in a spatial image; 7 shows a manual clearance adjustment mechanism with shaft spikes made in the form of pins in the process of manual brake adjustment.

The vehicle brake regulator comprises a housing 1 that acts as a brake lever. Inside the housing 1, in the corresponding cavities, there is a worm gear including a worm gear 2 and a worm 3, which rests on one of its trunnions 4. A retainer 5 and a shaft 6, equipped with a profile shank 7 and radial spikes 8, are installed coaxially with the worm 3. At the mutually facing ends of the worm 3 and the retainer 5, respectively, radial grooves 9 and 10 are made to accommodate the spikes 8 of the shaft 6. The shaft 6 has the possibility of axial movement and is spring-loaded from the side of the worm by a spring 11.

The worm 3 together with the lock 5 and the sleeve 4 is fixed from axial movement by means of a threaded sleeve 12, which at the same time is a cavity plug in the housing 1. In addition, the lock 5 is fixed from rotation, for example, by a protrusion 13 made on it located in the hole 14.

In the connection of the shaft 6 and the threaded sleeve 12, a sealing ring 15 is installed, which ensures the tightness of the cavities of the housing 1.

Each radial spike 8 can be made in the form of two pins 16, one of which is located in the groove 9 of the worm 3, and the other in the groove 10 of the retainer 5 (figure 4).

The radial spikes 16 of the shaft 6, located in the grooves of the worm 3 and located in the grooves of the retainer 5, can be in mutually perpendicular planes (Fig.5-7).

On the vehicle, the regulator is mounted on the brake drive shaft and connected to the brake chamber rod (not shown in the figures).

The regulator operates as follows.

When the brake is in normal operation, the spring 11 holds the shaft 6 in the position when the radial spikes 8 interact simultaneously with both the grooves 9 of the worm 3 and the grooves 10 of the latch 5. Due to this, as well as the fact that the latch 5 is fixed in the housing 1 , the worm 3 is locked against spontaneous rotation.

As the friction elements of the brake wear, it becomes necessary to adjust it. To do this, put on a profile shank 7 of the shaft 6 a rotary tool, for example, a key and drown the shaft 6, pressing on its end with a finger, into the housing 1 until it stops. In this case, the spikes 8 of the shaft 6 will come out of the grooves 10 of the retainer 5 and will interact only with the grooves 9 of the worm 3. Now, by rotating the shaft 6 with the key, you can rotate the kinematically connected worm 3 in the desired direction. When the worm 3 rotates clockwise, the brake clearance decreases, and when it is rotated in the opposite direction, it increases. This is how the brake is manually adjusted.

The brake regulator, the shaft spikes of which are made in the form of pins, works in the same way.

The design of the regulator is reliably protected from penetration of dirt into the housing. This is achieved due to the fact that the sealed movable joint contains only cylindrical surfaces. Ensuring the reliability of compaction of such joints is straightforward.

Literature

1. Application of Germany (RE) No. OS 3345148, publ. 06/27/1985, MKI F16D 65/42.

2. US Patent No. 4624345, publ. 11/25/1986, MKI F16D 65/46.

List of items

1. Case

2. Worm wheel

3. The worm

4. Bushing

5. Lock

6. Val

7. Shank profile

8. The radial spike

9. Worm groove radial

10. Lock groove radial

11. Spring

12. Threaded sleeve

13. The tab of the latch

14. Hole in the housing

15. O-ring

16. The pin.

Claims (3)

1. The vehicle brake regulator, comprising a housing serving as a lever, a worm gear including a worm wheel and a worm located in the respective body cavities, as well as a manual brake clearance adjustment mechanism, including a shaft with a profile shank mounted coaxially with the worm, and a lock for locking the worm relative to the housing, characterized in that the latch mechanism for manual adjustment of the gap is installed in the regulator body stationary, and the shaft of the said mechanism is installed with the possibility of evogo displacement, spring-loaded by the worm and is provided with radial studs, while on the mutually facing end faces of the worm and the retainer are made radial grooves which accommodate respective studs shaft. 2. The controller according to claim 1, characterized in that each radial shaft spike is made in the form of two pins, one of which is located in the groove of the worm, the other in the groove of the retainer. 3. The controller according to claim 2, characterized in that the radial shaft spikes located in the grooves of the worm and located in the grooves of the retainer are in mutually perpendicular planes.

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