SU931638A1 - Versions of hoisting and load-handling machine speed limiter - Google Patents

Description

I

The invention relates to a lift-transport engineering, in particular, to the speed limiters of vehicles of mine trolleys, elevators, etc.

A known speed limiter is a truck that contains centrifugal weights placed in a casing with safety springs mounted on them mounted on rotary axles made with eccentrics and retaining elements t.

However, the known structure is not reliable enough in operation.

The purpose of the invention is to simplify the design and increase reliability.

To achieve the goal in the first embodiment, the limiter is equipped with figured cams located on the inner side of the housing wall and interacting with the springs, and the cams have a restricting protrusion and two depressions.

In the second variant, the limiter is provided with supporting prisms fixed on the inner side of the housing wall and drivers mounted rotatable on the weights, the distance between the prisms being less than the free length of the springs, and the middle part of each spring is marked in the hole made in the leash.

In addition, in order to make a rough adjustment, one of the prisms is made with the possibility of longitudinal movement.

In the third embodiment, a recess is made on each load of the limiter, in which one end of the spring is placed, the other end of which is rigidly fixed on the inner side of the housing wall, and the distance between the recess and the spring attachment point on the wall is less than its free length.

Claims (3)

 Moreover, in order to provide precise adjustment, the eccentric axes are placed in the holes made in the wall of the housing, and the fixing elements include flanges with bolt fastenings mounted on the outer side of the housing, and the springs are plate-shaped. In FIG. 1 shows a limiter, in the first embodiment, in a non-operating position, a general view; Fig. 2 shows the same in the working position; in fig. 3 limiter according to the second option in the off position, general view; Fig, the same, in the working position; in fig. 5 - the organizer according to the third variant, general view; in fig. 6 - times cut AA. one; in fig. 7 is a view B in FIG. 6. The speed limiter contains kopus 1, which has a rigid kinematic connection with the chassis of the transport means. On the housing 1, two centrifugal weights are mounted by means of axles 2 (FIG. 6). The number of weights 3 is selected from the condition of a balanced rotation of the leading body 1. Each axle 2 has an eccentric C around which the weight 3 can rotate at a certain angle, and a flange 5 with which the axle 2 is fastened with bolts 6 to the body 1 (from its outer side) . On the load 3, screws 7 secure the plate spring 8, which is in contact with the cam 9, which contains the limiting protrusion 10 and two depressions. The protrusion 10 prevents the load 3 from turning towards the periphery of the housing 1, and the cavities 11 fix the load positions corresponding to the open and closed state with the driven drum 12 by means of the stops 13. According to the second embodiment of the limiter, prisms k are installed on the inner wall of the housing a spring 8 is placed, the middle part of which is connected to the load 3 by means of the lead 16. According to the third embodiment, one end of the spring 8 is placed in the recess 17 of the load 3, and the other end is rigidly attached to the wall of the housing. The speed limiter works as follows. When the housing 1 rotates counterclockwise under the influence of centrifugal forces, the weights 3 rotate on eccentrics as ioc x toward the periphery of the housing 1, the spring 8 bends relative to the limiting protrusion 10 of the cam 9..When the spring 8 reaches a bend size sufficient for it to start sliding over the protrusion 10, the spring 8 is pulled down from the limiting protrusion 10, the notch 15 or 17 and the load 3 comes into contact with the drum 12, the subsequent closure with which is carried out with the help of the stops 13. The drum 12, having received rotation from housing 1, includes vehicle catchers for emergency stopping. Restoration of the working condition of the speed limiter is made by turning the body 1 in the opposite direction (travel by a trolley back), as a result of which the cargo 3 is on the backside of the stops 13 and the springs 8 are moved to the original position. Adjusting the proposed speed limiter to the required value of the controlled speed is carried out by more or less immersing the spring 8 and contacting the t1 cavity, recess 15 or j17. This is achieved by rotating the axles 2 in the centering holes of the housing 1, at which the spring B is displaced due to eccentricity e. The rotational positions of the axis 2 after adjustment are fixed by bolts 6. The proposed design of the speed limiter will significantly reduce the laboriousness of its manufacture and simplify its adjustment on the stand at the required threshold, due to the stability of the leaf spring characteristics. The small axial envelope of the proposed speed limiter creates the prerequisites for embedding it into the running wheel, which further simplifies the design of the speed limiting unit of the mine trolleys. Claim 1. The speed limiter of the lifting vehicle, mainly of mine wagons, containing centrifugal weights placed in the hull with safety springs mounted on them, mounted on rotary axles made with eccentrics and locking elements, characterized in that, in order to simplify the design and increase reliability, it is provided with figured cams located on the inner side of the housing wall and interacting with springs, and the cams have a restrictive protrusion and two depressions. 2. A speed limiter of a lifting vehicle, mainly of mine carriages, containing centrifugal weights placed in a casing with safety springs mounted on them mounted on swiveling axles made with eccentrics and locking elements, characterized in that, in order to simplify design and increase reliability, it is provided with supporting prisms fixed on the inner side of the housing wall and with levers mounted rotatable on loads, and the distance between the prisms is It is shorter than the free length of prunes, and the middle part of each spring is placed in a hole made in a leash. . 3. The limiter according to claim 2, which is based on the fact that, in order to carry out its rough adjustment, one of the prisms is made with the possibility of longitudinal movement.  . A speed limiter for a lift truck, mainly of mine trolleys, containing centrifugal weights placed in a casing with safety springs mounted on them mounted on swivel axles made i with eccentric and locking elements, different the fact that, in order to simplify the design and increase reliability, on each load there is a notch in which one end of the spring is placed, the other end of which is rigidly fixed to the inner side of the housing wall, with the distance between the helmet and the spring attachment point on the wall v is less than its free length. . 5. The limiter for PP. 1, 2 and, characterized in that, With the adjusting chain, the eccentric axes are housed in the holes made in the wall, and the locking elements include flanges with bolted fastenings mounted on the outside of the housing. 6. The limiter for PP. 1, 2 and, characterized in that springs are made of plate. Sources of information taken into account in the examination 1. USSR author's certificate If 680968, cl. In 66 In 5M, 1978 (prototype).  L AL Ib