EP1843365A2 - Actuating rod assembly with an actuating rod - Google Patents

Abstract

The arrangement has a control rod (3) and a holder fitting (1) at a control rod end. The holder fitting exhibits a hollow cylindrical recess (6) with an inner superficies surface and an outer superficies surface. The inner superficies surface is formed by a holder fitting unit (4) and the outer superficies surface is formed by a holder fitting unit (5), where the two holder fitting units (4, 5) are connected with each other in a form-fit manner by using a thread (7). The control rod is inserted into the outer superficies surface in the direction of an axis (2).

Description

The invention relates to a shift rod assembly with a shift rod and with a socket fitting on at least one shift rod end, wherein the socket fitting has a hollow cylindrical recess with an inner circumferential surface and an outer circumferential surface, in which the shift rod is inserted in the direction of an axis.

Such shift rod assemblies are known, for example from the high-voltage circuit breaker construction. There, a known shift rod assembly is used to transmit movement from a drive to a movable contact. Switching operations on circuit breakers occur within fractions of a second, especially in the high and very high voltage range. There are high accelerations on the shift rod. The area of the connection between the shift rod and the socket fitting is subjected to an increased load. The inserted shift rod can be released from its seat in the hollow cylindrical recess in repeated switching operations.

The object of the invention is therefore to design a shift rod assembly of the type mentioned in such a way that a permanently strong bond between the shift rod and the socket fitting is made possible.

According to the invention this is achieved in the shift rod assembly of the type mentioned in that the inner circumferential surface of at least a first Fassungsarmaturelement and the outer surface of at least one second Fassungsarmaturelement are formed and the two Fassungsarmaturelemente are positively connected with each other.

The hollow cylindrical recess makes it possible to provide large surfaces for transmission of forces on relatively short sections. The forces on both the inner and on the outer circumferential surface in the shift rod on or be discharged from the shift rod. A positive connection of the two Fassungsarmaturelemente can be used both to form the hollow cylindrical design, as well as to secure the position of the socket fittings to each other. In the case of a switching movement, the force is transmitted via the positive-locking composite both via the inner and on the outer lateral surface to the shift rod or vice versa. As a result, the attacking force can be fully distributed and initiated. Thus, a punctual load on the inserted shift rod end is reduced. The Fassungsarmaturelemente can be designed, for example, half-shell-like or in other suitable divisions or in each case in one piece. A positive connection between the Fassungsarmaturelementen can be formed for example by Hintergreifungen, undercuts, hooks, recesses, etc. When produced positive fit the socket fittings are fixed in position to each other, so that a torsionally rigid socket fitting is formed.

A further advantageous embodiment may provide that the positive connection is formed by a thread.

By using a thread as a form-fitting element, it is possible to align the position of the socket fitting elements to each other in a fine gradation. By shifting along a thread, the overlap area be set between the Fassungsarmaturelementen. This makes it possible, for example, to compensate for manufacturing tolerances.

A further advantageous embodiment can provide that at least one thread of the thread is aligned coaxially to the axis.

Due to the coaxial alignment of at least one thread turn, a change in position along the axis can take place by a relative movement of the two partners involved in the form-locking connection. As a rule, the axis corresponds to the longitudinal axis of the shift rod. In a rotationally symmetrical shape of the shift rod, the axis is advantageously parallel or congruent to the axis of rotation of the shift rod. In a skilful configuration of the thread, a single thread may be sufficient to produce a sufficient positive engagement between the two Fassungsarmaturelementen and cause a force distribution over the thread on both the first and on the second lateral surface. This is a prerequisite for distributing high forces that occur during a movement over a large area and to load the shift rod inserted into the hollow cylindrical recess as uniformly as possible over as many contact surfaces as possible to the socket fitting.

A further advantageous embodiment can provide that the first and the second lateral surface of the socket fitting elements are aligned coaxially with the axis.

The coaxial alignment of the lateral surfaces of the two Fassungsarmaturelemente to the axis causes a compact design of the socket fitting.

Furthermore, it can be advantageously provided that at least one of the lateral surfaces is connected via a cohesive connection with the shift rod.

In addition to the custom-fit production and tuning of Schaltstangendimensionen and the hollow cylindrical recess to form a press fit or other suitable non-positive connection, such as deformations, etc., which serves to secure and transmit the motion forces, the shift rod in the inserted state in the hollow cylindrical recess through the Inserting an adhesive can be secured. Manufacturing tolerances can be compensated because cavities are reliably sealed and sealed. Since the forces are introduced on both sides of the recess, that is, on the inner and on the outer circumferential surface in the shift rod, the specific burden of the adhesive surfaces is reduced. As a result, inexpensive adhesives can be used. In addition, other cohesive bonding methods, such as welding, soldering, vulcanization, etc., can be used.

Advantageously, it may further be provided that the second socket fitting element surrounds the first socket fitting element in the manner of a throw-over.

The design of a throw-over can be done in a simple manner a hollow cylindrical configuration of the recess for receiving the shift rod. In addition, the position of the socket fitting elements can be fixed to one another such that additional spacers, guide elements or the like between the socket fitting elements are not necessary due to the positive connection of the two socket fitting elements.

A further advantageous embodiment can provide that the shift rod is at least partially formed as a hollow cylinder, wherein in the region of the socket fitting, the shift rod has a reduced wall thickness.

In order to be insertable into the hollow cylindrical recess of the socket fitting, the switching rod must have a hollow cylindrical shape at least at one end. It is advantageous to form the entire shift rod substantially hollow cylindrical. As a result, mass and material-saving switching rods can be used. In order to continue to save mass, it is advantageous to reduce the wall thickness in the region of the receptacle in the socket fitting. By connected in this area with the shift rod socket fitting sufficient resistance to mechanical stress, as can occur in switching and shock processes, guaranteed.

A further advantageous embodiment can provide that at least one lateral surface has at least one circumferential shoulder.

By a projecting shoulder, a cylindrical lateral surface is modified into a lateral surface shape with projections. By the projections, it is possible to better initiate occurring forces of the shift rod in the socket fitting or of the socket fitting in the shift rod. Rotary and pushing movements of the shift rod relative to the socket fitting can be better intercepted. For this purpose, it can be provided that a plurality of circumferential shoulders are introduced into the lateral surface. It can be provided that one or more shoulders in the lateral surface in each case rotate closed in itself. This should preferably be done coaxially to the axis, it can be provided that several shoulders are grouped together. Thus, for example, a plurality of shoulders can be arranged close to one another in the axial direction and form a first group, and a second group of shoulders, which are likewise arranged close to one another, can be arranged at a greater distance from the first group.

Advantageously, it can further be provided that the circumferential shoulder spirals around.

By a spiral circulation with respect to the direction of the axis, a guide is provided which allows a simplified insertion of the shift rod in the hollow cylindrical recess.

Furthermore, it can be advantageously provided that the shoulder rotates in the manner of a thread.

If the shoulder is formed in the manner of a thread, then advantageous production methods result since a large number of successive shoulders, which run transversely to the axis, can be placed close together in a narrow section.

Advantageously, it may further be provided that in the axial direction, a distance between the shoulders is narrower than a width of the shoulder in the axial direction.

By providing a smaller distance between the shoulders than the width of the shoulders themselves, a structured surface is created which gives favorable properties for transmission of forces. It can be provided that the shoulder itself also has a profiling, whereas the area between the shoulders in Radial direction is set back relative to the shoulder region.

Advantageously, it may further be provided that at least one of the lateral surfaces is connected via a cohesive connection with the shift rod.

On the one hand, the provision of shoulders enables a frictional connection between the socket fitting and the selector rod. In addition, the connection between the two connection partners can be strengthened by the provision of a material connection. Adhesive, welding, vulcanization or the like can be used for cohesive bonding. Due to the surface structure of the lateral surfaces can still be made a positive connection. In combination of force and material connection creates a reliable connection.

Advantageously, it can further be provided that the shoulder is formed by grooves introduced into at least one of the lateral surface.

It can also be provided that advantageously the shoulder is formed by a projection integrally formed on at least one circumferential surface.

Depending on the advantageous manufacturing process, the shoulders can be formed by the introduction of grooves in a prefabricated body. However, it can also be provided that a shoulder is integrally formed on the base body.

Furthermore, it can be advantageously provided that both lateral surfaces each have at least one circumferential shoulder.

If both lateral surfaces are equipped with the circumferential shoulders, the stability of the connection can be further increased. Depending on requirements, in the mounted state, with respect to the axial direction, the shoulders in a radially lying plane can be directly opposite one another or the shoulders can also be arranged offset relative to one another. In the former case, an increased pressing force is exerted on the shift rod to be inserted. In the second case, the shift rod between the projections is clamped wave-like. Depending on the materials used for the socket, for example a metal frame and a plastic material for the rod, different arrangements and configurations of shoulders and arrangements of the shoulders can be selected depending on the coefficient of friction.

In the following, embodiments of the invention are shown schematically in figures and described in more detail below.

• Figur 1 einen Schnitt durch eine Schaltstangenanordnung mit einer Fassungsarmatur einer ersten Art, die
• Figur 2 einen Schnitt durch eine Schaltstange mit einer Fassungsarmatur einer zweiten Art, die
• Figur 3 einen Schnitt durch eine Fassungsarmatur mit Schultern, welche auf eine Schaltstange aufgesetzt ist, die
• Figur 4 einen Ausschnitt aus einer alternativen Ausgestaltungsvariante von Schultern, die
• Figur 5 eine weitere alternative Ausgestaltungsvariante von Schultern.

It shows the

• 1 shows a section through a switching rod assembly with a socket fitting of a first type, the
• 2 shows a section through a switching rod with a socket fitting of a second type, the
• 3 shows a section through a socket fitting with shoulders, which is placed on a shift rod, the
• Figure 4 shows a detail of an alternative embodiment variant of shoulders, the
• Figure 5 shows another alternative embodiment variant of shoulders.

1 shows in section a socket fitting 1 of the first kind in the assembled state. Along an axis 2 extends a tubular shift rod 3. The shift rod 3 is shown only partially in the figure and is inserted with a free end in the socket fitting 1. The shift rod 3 is preferably made of a fiber-reinforced plastic, for example in a winding process. As fibers find for example glass fibers or Kevlar fibers use. In the area of the recording of the shift rod 3 in the socket fitting 1, the wall thickness of the shift rod 3 has a reduced thickness.

The socket fitting 1 is essentially formed from a first socket fitting element 4 and a second socket fitting element 5. The two socket fittings 4, 5 are formed substantially rotationally symmetrical. The first Fassungsarmaturelement 4 has a lateral surface, which serves as an inner circumferential surface and a hollow cylindrical recess 6 limited. The second Fassungsarmaturelement 5 has a coaxial with the inner lateral surface lying on lateral surface. This lateral surface acts as an outer circumferential surface and delimits the hollow cylindrical recess 6.

In order to limit the mass and the volume of the shift rod 3 and the socket fitting 1, the shift rod 3 is provided at the plugged into the hollow cylindrical end with a reduced wall thickness. Furthermore, the second Fassungsarmaturelement 5 on the outer circumference with a circumferential groove 8 provided. To be able to connect the socket fitting, for example, to a lever, an eyelet 9 is formed on the socket fitting 1 of the first kind, starting from a rotationally symmetrical section.

The first Fassungsarmaturelement 4 has at the bottom end of the bag-like extending hollow cylindrical recess 6 has an external thread. The second socket fitting element 5 has a diametrically opposed internal thread. As a result, a positive connection in the form of a thread 7 is given. The thread of the thread 7 extends coaxially to the axis 2. By a large number of revolutions of the thread of the thread 7 results in a comparatively large number of edges, via which forces acting on either the shift rod 3 or on the socket fitting 1, Both over the inner circumferential surface and over the outer circumferential surface of the hollow cylindrical recess 6 are transferable. In FIG. 1, a force distribution over the thread 7 on both sides of the hollow cylindrical recess 6 in the inner and the outer lateral surface is shown symbolically in the region of the hollow cylindrical recess by a plurality of interrupted solid lines.

To reinforce the transmission of force to the inner or outer lateral surfaces of the hollow cylindrical recess 6, in each case the introduction of an adhesive is provided in the contact region of the two lateral surfaces with the inserted end of the shift rod 3. Part of the forces is transmitted by the adhesive, whereby the adhesive bond is largely protected against shock and breakage phenomena. Such shock and breakage phenomena are caused, for example, by relative movements of the socket fitting elements. Due to the positive connection in the form of the thread 7 such relative movements are hardly possible. About the thread is a Distribution of the forces to be transmitted without the adhesive bond itself to apply additional forces from relative movements.

FIG. 2 shows a socket fitting 1a of a second type. The socket fitting basically has the same construction as the socket fitting 1 of the first type shown in FIG. 1. Only the integration of the first socket fitting element 4a for the transmission of forces is configured in an alternative form , Instead of the eyelet 9 shown in Figure 1, the first Fassungsarmaturelement 4a has a transverse to the axis 2 standing flat surface, in which blind holes 10a, 10b are recessed. The blind holes 10a, 10b are each provided with a thread, so that by means of bolts the socket fitting 1a can be coupled to a drive element or an output element. The second type of socket fitting 1a has the advantage that, for example, an eye can be screwed onto the first socket fitting element 4a via the blind bores 10a, 10b. As a result, various types of coupling of the socket fitting 1a of the second type to different drive devices are possible.

It can be provided that, in addition to the design variants illustrated in FIGS. 1 and 2, further variants of the socket fitting are also used. The position of the positive connection can vary. Furthermore, the outer shape can be made variable. It can be provided that different socket fittings are each attached to a first and a second end of a shift rod.

Both in the Figure 1 and in the Figure 2 shown embodiment of a socket fitting 1, 1a, the second socket fitting 5, 5a in the form of a throw over the first Fassungsarmaturelement 4, 4a slipped over. Due to the dimensioning and arrangement of the thread 7, the position of the socket fitting elements 4, 4a, 5, 5a to each other with respect to the axis 2 is fixed. This makes it possible to easily connect the socket fittings 1, 1a with a shift rod 3, 3a.

In the figure 3 a socket fitting 1c is shown in section. The socket fitting is formed essentially of two nested rotationally symmetrical Fassungsarmaturelementen. A first socket fitting element 2 c is designed rotationally symmetrical and arranged coaxially to an axis 4. A second mount fitting element 3c is also arranged coaxially with the axis 4c and surrounds the first mount fitting element 2c. The first socket fitting element 2 has a lateral surface, which is aligned in the radial direction to the second socket fitting element 3c. In contrast, the second socket fitting element 3c has a lateral surface which faces in the radial direction the shell surface of the first socket fitting element 2c described above. In the mounted state of the socket fitting 1, an approximately hollow-cylindrical circumferential recess is formed between the two lateral surfaces of the first and the second socket fitting element 2c, 3c. The recess is bagged embedded in the socket fitting 1 and opened to a front side of the Fassungsarmatur2 out. In the frontal opening of the recess, a shift rod 5c is inserted. The switching rod 5c is preferably formed from a hollow cylindrical insulating material, for example a glass fiber reinforced or Kevlar fiber reinforced plastic, at least in the region of the socket fitting 1c. In order to hold the switching rod 5c in the circumferential recess of the socket fitting 1c, a plurality of projecting shoulders 6c in the lateral surfaces of the first socket fitting 2c and the second Socket fitting 3c introduced. The protruding shoulders 6c may, for example, each be designed as self-contained circumferential rings, but it may also be provided that the shoulders along the axis 4 are formed spirally encircling. In the example shown in FIG. 1, the projecting shoulders 6c introduced into the lateral surface of the first socket fitting 2c and the lateral surface of the second socket fitting 3c are arranged in such a way that they are arranged in pairs opposite one another in a radial direction. This creates areas with an increased contact pressure on the inserted shift rod 5c. In addition, it can be provided that the shoulders are provided in their projecting areas with further circumferential grooves, edges or similar projections. The circumferential shoulders can also be interrupted by recesses, so that a circulation of several sectors is illustrated. In order to further increase the holding force of the shift rod 5c in the socket fitting 1c, an adhesive is introduced into the joint area. By the adhesive is additionally given a cohesive connection. In cooperation with the projections and the material connection a permanently strong connection between the shift rod and socket fitting 1 is given. Next, the two socket fittings 2c, 3c may be positioned by a positive locking. Such a positive connection is given for example by a thread 8c. To form a positive connection that applies in the general description part or in the figure description part of Figures 1 and 2 described.
When using circumferential shoulders, however, the use of a positive connection is not necessarily necessary.

FIG. 4 shows a detail of projecting shoulders 6ac of a first socket fitting element 2ac and of a second socket fitting element 3ac. The projecting Shoulders on the first socket element 2ac and the second socket element 3ac are arranged offset in the axial direction to each other, so that a wave-like deformation of the surface of the shift rod 5c takes place. Evident are on the projecting shoulders 6ac additionally mounted grooves or elevations.

FIG. 5 shows a further exemplary embodiment for the configuration of protruding shoulders on a first or a second socket fitting element. Each of the projecting shoulders 6cc shown in Fig. 5 is formed by a plurality of coaxial circumferential grooves axially offset from each other. The circumferential grooves are arranged in close proximity to each other. Between each projecting shoulder, a recessed groove-like portion 7c is formed. This results in shoulders having at their projecting portion a plurality of circumferential grooves or a plurality of circumferential grooves are arranged in groups and spaced to a further group of grooves arranged. Instead of several grooves and a groove can rotate several times around the axis in the manner of a thread.

The formations in the example shown in FIG. 5 are selected such that groove-like grooves are formed which have a curved groove bottom. Such a configuration can be arranged both on a first socket element and on a second socket element.

Claims (14)

Shift rod assembly comprising a shift rod (3, 3a, 5c) and a socket fitting (1, 1a, 1c) on at least one shift rod end, wherein the socket fitting (1, 1a, 1c) a hollow cylindrical recess (6) having an inner circumferential surface and an outer Has lateral surface, in which the shift rod (3, 3a, 5c) in the direction of an axis (2, 4c) is inserted,
characterized in that
the inner lateral surface of at least one first mounting armature element (4, 4a, 2c) and the outer lateral surface of at least one second mounting armature element (5, 5a, 3c) are formed and the two mounting armature elements (4, 4a, 5, 5a, 2c, 3c) are positively connected with each other. Shift rod assembly according to claim 1,
characterized in that
the positive connection is formed by a thread (7, 8c). Shift rod assembly according to claim 2
characterized in that
at least one thread of the thread (7, 8c) is aligned coaxially with the axis (2, 4c). Switching rod arrangement according to one of claims 1 to 3,
characterized in that
the first and the second lateral surface of the socket fitting elements (4, 4a, 5, 5a, 2c, 3c) are aligned coaxially with the axis (2, 4c). Switching rod arrangement according to one of claims 1 to 4,
characterized in that
at least one of the lateral surfaces via a material connection with the shift rod (3, 3a, 5c) is connected. Switching rod arrangement according to one of claims 1 to 5,
characterized in that
the second socket fitting element (5, 5a, 3c) surrounds the first socket fitting element (4, 4a, 2c) in the manner of a throw-over. Switching rod arrangement according to one of claims 1 to 6,
characterized in that
the switching rod (3, 3a, 5c) is at least partially hollow-cylindrical, wherein in the region of the socket fitting (4, 4a, 5, 5a, 2c, 3c), the switching rod (3, 3a, 5c) has a reduced wall thickness. Switching rod arrangement according to one of claims 1 to 7,
characterized in that
at least one lateral surfaces has a circumferential shoulder. Shift rod assembly according to claim 8,
characterized in that
the circumferential shoulder spirals around. Shift rod assembly according to claim 8 or 9,
characterized in that
the shoulder rotates in the manner of a thread. Shift rod assembly according to claim 10,
characterized in that
in the axial direction, a distance between the shoulders is narrower than a width of the shoulder in the axial direction. Switching rod arrangement according to one of claims 8 to 11,
characterized in that
the shoulder is formed by grooves introduced into at least one of the lateral surface. Switching rod arrangement according to one of claims 8 to 11,
characterized in that
the shoulder is formed by a projection integrally formed on at least one of the lateral surface. Switching rod arrangement according to one of claims 8 to 13,
characterized in that
both lateral surfaces each have at least one circumferential shoulder.

Images