DE1665656C - Stop for moving machine parts to and fro - Google Patents

Description

35

The invention relates to a stop for machine parts that move back and forth. Such attacks are in particular for the moving contact piece of a high-voltage switch or its Drive parts are required because a certain stroke must be adhered to precisely there. The limitation of the stroke however, fixed stops result in shocks due to the inertia forces. That's why you have the attack Upstream springs. With reciprocating moving parts you have the two end points of the Movement each assigned a stop with its own spring.

Compared to the known, the invention is characterized in that the stop is movably arranged is and is held by the spring in a central position that the spring from the stop depending on the direction of movement of the machine part is oppositely stressed. Man In this way, it only needs a single spring.

The mobility of the stop is appropriately adapted to the movement of the machine part, whose path should be limited by the stop. The stop is preferably pivotably mounted. In the case of machine parts which can be rotated about a shaft, this can advantageously be carried out in such a way that the stop is pivotably mounted on the shaft. This results in a simple arrangement that is largely independent of the swivel angle of the machine part, as will be explained in more detail later.

In the invention, a spiral spring is preferably used, which is opposite from the stop Pages is deflected. With a spiral spring a rod is meant that is attached to the stop chamfered end is firmly clamped and at its other end by the movements of the stop is pushed aside. The spring can for example be hinged to the stop so that no shocks occur between it and the stop.

The movement of the stop can in turn be limited in order to achieve a maximum deflection of the machine part to pretend. The limitation can be adjustable. In the case of electric sc'ialtera it is useful to dimension the spring force so that the stop by the driving force up to the rigid limit is guided so that a defined end position is available. You can also use this Avoid vibrations in the end positions. The elastic stop according to the invention then acts mainly as a shock absorber.

In the drawing, an embodiment of the invention is shown in simplified form.

The movable machine part is a crank 1, which sits on a shaft 2 and for operating the Scissors of a high-voltage disconnector are used. Such scissor disconnectors are for example in of the operating instructions B 193 from Siemens-Schuckertwerke AG from 1958. The wave 2 is assigned to a rotatable insulator, which is parallel to the post insulator carrying the scissors runs.

The crank 1 executes a swivel angle of 180 °. It is used for this by a double-acting Compressed air drive set in motion, which engages the earth-side end of the aforementioned isolator. This Movement must be strictly observed. Therefore, stops are provided in both end positions of the cranks.

In the invention, the stops are cams 3 and 4 of a pivot mounted on the shaft 2 Stop 5. The crank 1 strikes in one direction of movement against the cam 3, in the other Direction of movement with the other side against cam 4. In both cases, stop 5 pivoted around shaft 2. A spiral spring 8 counteracts this pivoting. This is a Steel rod clamped on one side, which is held in a guide 9 and held in place with a clamp 10 will.

At the opposite end of its restraint, the steel rod carries a block 12, which with the Stop is connected via a pin 13. As a result, the spiral spring 8 holds the stop S in one Middle position. At the end of the movement of the crank 1 in one direction, e.g. B. at the end of the switch-on process, the steel rod when the crank 1 hits the cam 4 in the direction of the dash-dotted line Deformed line 14. At the end of the countermovement that the crank 1 turns off the Circuit breaker executes, the stop 5 of the Crank 1 deflected over cam 3. The steel rod is then moved in the direction of the dashed line 15 deformed. The deformation leads to a gentle braking of the with the deformation work Crank 1 related masses.

At the end of the permissible stroke, the block 12 hits one of the depending on its direction of movement Screws 17 or 18 that are used in fixed machines

3 4

nenteile 19 and 20 are screwed adjustable. In the exemplary embodiment, the stop 5 is in The setting is shown with lock nuts 21 and 22 in the middle position. The crank t is also secured. none of the cams 3 and 4 in contact. The invention is not limited to the embodiment shown in the form of application of the invention. By changing the scissor disconnector, the switching process can only be performed while the position of the cams 3 and 4 is changing. In the end positions of the switch stop 5 for any other swivel angle, ie in the switch position or switch position, press the button. For example, instead of the cams 3, 4 welded to the crank 1 under the action of the stop 5, not shown, adjusting screws drive and / or the dead weight of the ben similar to the screws 17, 18 can be arranged. In addition to scissoring the stop 5 over the cam 3 or 4, the invention can also be useful for parts that are moved in a straight line far out of the central position so that the block 12 parts. This can be imagined as a change in either the screw 17 or 18 applied to the embodiment, through which a defined end position is created, which means that the cams 3 and 4 with their effective surfaces are directed against each other without significant bruises or vibrations and the straight line be 15 is reached.

the machine part grabbed between the cams under certain circumstances it is not necessary to

Here, the eccentric spring 8 can be coupled to the stop 5 without play. for

speed of the cam with respect to the pivot point of this case can be seen on the articulated connection

Stop, which in the exemplary embodiment of the verzi by the pin 13, /. Th and the spiral spring 8 Shaft 2 is formed, lead to the elasticity of the bending ao in such a large hole nr block 12 that

the 8 must be matched so that the desired damping for the tilt 'in the lateral deflections

function characteristic is obtained. there is enough space of the steel rod.

1 sheet of drawings

Claims (6)

Patent claims: 1. Stop for reciprocating machine parts, in particular the movable S switching element of a high-voltage switch or its drive parts, with a spring for the shock-free absorption of inertial forces, characterized in that the stop (5) is movably arranged and supported by the spring (8) is held in a central position in such a way that the spring (8 ) is oppositely stressed by the stop (S) depending on the direction of movement of the machine part (1). 2. Stop according to claim 1, characterized in that the stop (S) is pivotably mounted. 3rd ar. "Hlag according to claim 2 for one by one Shaft rotatable machine part, characterized in that the stop (5) on the shaft (2) is pivotably mounted. 4. Stop according to claim 1, 2 or 3, characterized in that the spring (8) is a spiral spring which is deflected from the stop (S) to opposite sides. 5. Stop according to one of claims 1 to 4, characterized in that the movement of the Stop (5) is rigidly limited. 6. Stop according to claim 5, characterized in that that the limitation .ng (17, 18) is adjustable.