EP3710308A1

EP3710308A1 - Scissor joint

Info

Publication number: EP3710308A1
Application number: EP18797126.2A
Authority: EP
Inventors: Beat Furrer; Bernhard Müller
Original assignee: Furrer and Frey AG
Current assignee: Furrer and Frey AG
Priority date: 2017-11-16
Filing date: 2018-10-13
Publication date: 2020-09-23
Also published as: WO2019097324A1; DE102017127051B3

Abstract

The invention relates to a device (4) for compensating for a change in length of a bar (3), in particular a bus bar, held on a supporting body (22) in a direction of the change in length (6), said device comprising: a first body part (24) having a supporting body interface (26) for connection to the supporting body (22); - a second body part (27) with a bar interface (29) for connection to the bar (3); and - a guide, by means of which the first body part (24) and the second body part (27) are mounted in a manner guided movably relative to one another in a guide direction with a direction component in the direction of the change in length (6).

Description

scissor joint

description

The present invention relates to a device for balancing a

Change in length of a rail held on a support body, in particular busbar.

Rails are floating to compensate for changes in length, as caused for example due to temperature changes.

The object of the invention is to improve the compensation of changes in length of rails.

According to one aspect of the invention, a device for compensating for a change in length of a rail held on a support body in a direction of length change, in particular busbar, comprises a first body part with a support body interface for connection to the support body, a second body part with a rail interface for connection to the rail and a Guide over which the first body part and the second body part are mounted against each other movably guided in a guide direction with a directional component in the direction of change in length.

The device is based on the consideration that the rail can be contaminated by their environment. However, the debris deposited on the rail can cause the movement of the floating blocked rail and so the compensation effect in the case of

Worsen length changes or even cancel altogether.

Here, the present invention attacks with the idea that the compensation effect in the case of changes in length not to bring about the rail itself, but with a guide, which holds between the rail and the rail

Carrying body is located. This leadership can then be active, for example, by

Einhausen or passive by a suitable selection of the guide itself protect against the aforementioned impurities.

In a development of the specified device, the guide can be a first to the first body part stationary guide part and a second to the second

Body part stationary guide part, each with a sliding surface for sliding bearing include, which are shielded from an environment. By the

Shielding the sliding bearing surfaces against the environment not only the sliding surfaces are actively protected against weathering, also a possibly present between the sliding surfaces lubricant can be better kept in this way.

In an additional development of the specified device, the guide comprises a joint element, wherein at least one of the sliding surfaces in the

Joint element is arranged. By forming the guide with one or more joints, the sliding bearing surfaces do not move relative to each other and thus do not come into contact with the environment, whereby they are automatically protected against weathering and contamination.

In a further development of the specified device, the guide may be a scissors joint comprising the joint element, on which the first

Guide member and the second guide member are held on a line opposite. In this way, despite the pivotal action of the joints, a linear movement is achieved with which the changes in length of the rail can in principle be compensated for over longer distances.

In a particular embodiment of the device specified, the first body part may comprise two plates held parallel to one another at a distance from one another by a spacer, wherein the first guide part is a bolt-like

Element that holds the scissors joint between the two plates. In this way the scissors joint becomes angled to equalize

Held longitudinal direction of movement, so that no rotational movements of the

Scherengelenkes are possible.

In addition, in a preferred development of the specified device, the support body interface can be arranged on one of the plates.

In another refinement of the specified device, the first body part may comprise a guide element held at an angle to the plates and arranged to guide the rail in the direction. In this way, the rail is held at an angle to be compensated for longitudinal movement direction, so that no rotational movements of the rail are possible.

In a particularly preferred embodiment of the specified device, the second body part may comprise a damping element which is adapted to dampen movements of the busbar at an angle to the direction of change in length. In particular, in the case of the choice of leadership as a scissors joint in which can act very high leverage on the scissors joint, so

Vibration damped, which increases the life of the specified device.

In an additional development of the specified device, the guide and the rail interface seen in the damping direction can be arranged spaced apart from each other with a variable distance. In this way height differences can be leveled during installation of the rail.

In a further expedient development of the device specified, the damping of the damping device can be designed to act in the direction of the rail interface as viewed from the guide. In this way, the damping effect can be achieved particularly well for suspended rails, which would otherwise lead by their gravity on the side rail interface impacting vibrations or the like.

The above-described features, features, and advantages of this invention, as well as the manner in which they are achieved, will be more fully understood Connection with the following description of the embodiments, which are explained in more detail in connection with the drawing. Show it:

Fig. 1 is a schematic view of a track section with a device for compensating for a change in length of a ceiling busbar from a

Perspective,

2 shows a schematic view of a first embodiment of the device from FIG. 1 from a perspective,

3 is a schematic view of a second embodiment of the device of FIG. 1 from a perspective,

4a is a schematic view of a third embodiment of the device of Fig. 1 from a perspective

Fig. 4b is a schematic view of the device of Fig. 4a from another perspective, and

Fig. 5 is a schematic sectional view of the device of Fig. 4a and 4b.

In the figures, the same technical elements are provided with the same reference numerals and described only once. The figures are purely schematic and above all not reflect the actual geometric conditions.

Reference is made to Fig. 1, which shows a schematic view of a covered with a ceiling 1 track section 2 with a device 4 for compensating a change in length of a rail in the form of a ceiling busbar 3 from a perspective. The covered track section 2, as shown in FIG. 1

is indicated, for example, in a tunnel, an underpass or a covered station be executed.

In the track section 2 extends in a direction of travel 6, a track 8, on which a not further shown electric rail vehicle can move out. For electrical power supply of the rail vehicle is seen in the track section 2 in a height direction 10 above the track 8 the Ceiling busbar 3 is arranged, from which the electrical

Rail vehicle with a pantograph in a conventional manner can take electricity. The ceiling busbar 3 may change in the direction of travel 6 in length due to environmental influences, such as temperature changes. In order to avoid mechanical stresses caused thereby, the device 4 is provided which compensates for these changes in length.

Before briefly discussing the construction of the ceiling busbar 3 on the basis of an enlarged profile view 14, the holder of the overhead busbar 3 above the track 8 on the ceiling 1 is briefly explained above. To the ceiling 1, a Deckenhaltefuß 18 is screwed via screws 16. As it is to

Understanding the execution of the closer structure of the ceiling support leg 18 does not arrive, it will not be discussed further. The ceiling support foot 18 holds with a screw 16 in a ceiling angle 20 to the ceiling 1 a long-rod insulator 20, at the ceiling 1 opposite side of a support body in the form of Zwischenhaltefußes 24 with a not further

indicated angle to a foot surface 26 of the Zwischenhaltefußes 24 is secured by a screw 16. This angle is the same as the ceiling angle 20. At the bottom surface 26 of the Zwischenhaltefußes 24, the device 4 is screwed on not referenced screws. The device 4 has a

Rail interface in the form of a connection surface 29 on a connection plate 27, at the bottom viewed in the height direction 10 via clamping bracket 28 and screws 16, the ceiling busbar 3 is braced.

Before describing exemplary embodiments of the device 4, the structure of the ceiling busbar 3 will first be briefly discussed with reference to the enlarged profile view 14.

The ceiling busbar 3 has seen in the height direction 10 at the

Top of a transverse arm 29, the right angle and against the

Height direction 10 protrude two spaced clamping arms 30. The

Ceiling busbar 3 is seen in the direction of travel 6 formed in several parts, the individual parts are mechanically and electrically interconnected via butt plates 31, on the one hand via screws on the

Ceiling busbar 3 are held. For positionally secure mounting spring / groove connections 32 may be provided. At a cross arm 29th opposite side, each clamping arm 30 on a driveway 33 for a not further shown assembly vehicle, which are each directed away from a center line 34 of the ceiling busbar 3. From a viewed in the height direction 10 underside of each route 35 extends each a clamping arm 36 to the center line 34 to. Between the two clamp arms 36 a contact wire 37 is clamped. The construction of the ceiling busbar 2 is known per se, for example, from DE 20 2004 009 420 U1 and will not be explained further below.

In Fig. 2 is a perspective view of a first embodiment of

Device 4 for compensating the change in length of the ceiling busbar 3 shown.

The first embodiment of the device 4 has a first body part in the form of a housing frame 38 which houses an interior space 39. The

Housing frame 38 has a support body interface in the form of a

Connection side 40, which via screws 16 to the bottom surface 26 of the

Zwischenhaltefußes 24 is screwed.

In the interior 39 of the housing frame 38, two parallel first guide parts in the form of guide rods 42 are fastened with screws 16 on the housing frame 38 in a transverse direction 41. Of these guide rods 42, only one can be seen in the perspective of FIG. Each guide rod 42 has a sliding surface in the form of an outer circumferential surface 43.

On the outer circumferential surface 43 of each of the guide rods 42, a second guide member in the form of a sleeve 44 is pushed. Each sleeve 44 has a

Through opening, which is bounded by a sliding surface in the form of an inner circumferential surface 45. In the state pushed onto the guide rods 42, the sleeves 44 slide over their inner lateral surface 45 on the outer lateral surface 43 of the guide rods.

Seen in the height direction 10, the two sleeves 44 are connected to each other at the bottom via a U-clamp 46. This U-clamp 46 is only partially visible in the perspective of FIG. The U-clamp 46 penetrates in a manner not visible in Fig. 2, a holding rod 47 which on one of the U-clamp 46th opposite side to the terminal plate 27 is connected as a second body part.

In operation of the first embodiment of the device 4, the two sleeves 43 slide on the guide rods 42 and thus compensate for changes in length of the ceiling busbar 3, i. means that the connection plate 27 can move as a second body part in the case of changes in length of the ceiling busbar 3 relative to the connection side 40 of the housing frame 38 as a first body part. Due to the parallel arrangement of the guide rods 42 in the transverse direction 41 forces are also absorbed in the transverse direction, whereby a commuting of the ceiling busbar 3 in the transverse direction 41 is prevented.

The housing frame 38 in FIG. 2 can be closed by lids, which are not shown further, which prevent contamination in the interior 39.

As a result, whirled up dust and the like do not settle on the guide rods 42, whereby a functioning slide bearing between the guide rods 42 and the sleeves 44 is always ensured. In addition, the

Guide rods 42 are also lubricated with a lubricant, which is also not exposed due to the cover not shown the environment.

In Fig. 3 is a perspective view of a second embodiment of

Device 4 for compensating the change in length of the ceiling busbar 3 shown.

The second embodiment of the device 4 has a first body part in the form of a holding plate 48. The holding plate 48 has a support body interface in the form of the connection side 40 and is screwed by screws 16 to the bottom surface 26 of the Zwischenhaltefußes 24.

A seen in the height direction 10 holding plate top 49 is bent at a bending angle 50. By the holding plate top 49 are in the

Transverse direction 41 spaced screw rings 51 out, which extend in the direction of travel 6. By the screw rings 51, a first guide part is guided in the form of a hinge pin 52 and secured to the screw rings 51. At this hinge pin 52, a second guide member is suspended in the form of a pendulum 53, which thus forms a joint 54 together with the hinge pin 52. The same joint 54 is located in the height direction 10 seen on both sides of the pendulum 53, wherein the terminal plate 27 is widened in the transverse direction 41 beyond the busbar 3 in order to fasten the screw rings 51 there can.

In operation of the second embodiment of the device 4, the pendulum 53 can be rotated about the two guide rods 42, whereby the ceiling busbar 3 can swing back and forth along the direction of travel 6 or swing. Changes in length of the ceiling busbar 3 can be compensated, because the

Connecting plate 27 can move as a second body part in the case of Längenänder- ments of the ceiling busbar 3 relative to the holding plate 48 as the first body part. The sliding surfaces of the joints 54, which are not further shown in FIG. 3, are always covered with respect to an outer side and can not become dirty in this way. In this way, with the joints 54, the same effect as with the housing 38 of the first embodiment, but on a much smaller space.

FIGS. 4a and 4b show, in two different perspective views, a third embodiment of the device 4 for compensating the change in length of the ceiling busbar 3.

The third embodiment of the device 4 has analogously to the second embodiment as the first body part on a holding plate 48 which is connected to the Zwischenhaltefuß 24 in exactly the same manner as in the second embodiment of the device 4. However, the holding plate 48 is not angled and further arranged parallel to the ceiling busbar 3. Seen in parallel and in the height direction 10 below the holding plate 48, a second holding plate 56 is held by way of a spacer 55. The spacer 55 is located in the direction of travel 6 seen at the rear end of both plates 48, 56, wherein the three elements 48, 55, 56 screwed together by a screw 16 against the depth direction 10.

On the viewed in the direction of travel 6 rear end of the resulting stack of the three elements 48, 55, 56, a guide member 57 is mounted with a guide groove 58 and screwed with two screws 16 in the spacer 55. In this case, the ceiling busbar 3 in the guide groove 58th added. To set a height of the guide element 57 in the depth direction 10, the guide member 57 may have slots 59 through which the screws 16 are guided. On the other hand, to ensure a high pressure force, a shim 60 may be placed between the screws 16 and the guide member 57. On the function of this guide element will be discussed later.

Seen in the direction of travel 6, a scissors joint 61 is held on a side opposite the guide element 57 between the two plates 48, 56. Scissors hinges are also known by the term scissor arm. The scissors hinge 61 has four equally long bars 62 which are held at their respective ends by means of joints 54 against each other rotatable. In this way, the rods 62 form a variable in its angular position parallelogram. One of the joints 54 is formed at the location where the scissor hinge 61 is held between the plates 48, 56 via a hinge pin 52. This joint 54 is not provided with a separate reference numeral in FIGS. 4a, 4b for the sake of clarity. Another joint 54 is seen in the direction of travel 6, the two plates 48, 56 formed opposite one another via a damping device 63, which will be discussed in more detail later. A seen in the depth direction 10 lower end of the damping device 63 is fixedly connected to the end plate 27.

In the operation of the third embodiment of the device 4, in the

Guide groove 58 held ceiling busbar 3 seen in the direction of travel 6 move back and forth. When the ceiling busbar 3 moves, for example, due to temperature changes in the direction of travel 6, it pulls the terminal plate 27 and thus the damping device 63 with it. In contrast, the two plates 48, 56, which are connected to the Zwischenhalte- foot 24, remain stationary. The resulting relative movement is absorbed by the parallelogram scissor joint 61. In this case, the scissors joint is stretched in the transverse direction 61 stretched when the ceiling busbar 3 moves in the direction of travel 6 and compressed when the

Ceiling busbar 3 against the direction of travel 6 moves.

Compared to the second embodiment, the third embodiment of the device 4 has the advantage that the connection plate 27 opposite to the two plates 48, 56 io

performs no rotational movement and thus in the case of temperature movements of the ceiling busbar 3 and no forces in other directions than the direction of travel 6 occur.

Finally, the damping device 63 will be explained in more detail with reference to FIG. 5. Both the pendulum 53 of the second embodiment of the device 4 and the flat bar 47 of the first embodiment of the device 4 can be replaced by the damping device 63 and / or expand it.

The damping device 63 comprises a tube 64 in which a plunger 65 is received coaxially. At an underside of the tube 64 seen in the direction of fleas 10, an adjusting thread 66 connects, which is guided by the joint 54 between the two rods 62 arriving at the damping device 63. Between the adjusting thread 66 and the two rods, a spacer sleeve 67 is held around which the rods 62 can rotate. In the height direction 10 seen on the two bars 62, a washer 68 is placed on a screwed onto the adjusting thread 66 adjusting nut 69 is placed. The

Plunger 65 is held stationary on the connection plate 27 and is separated by a spring 70 on the adjusting thread 66. In this way, the current rail 3 fastened to the connection plate 27 presses the adjusting nut 69 via the spring 70 and the adjusting thread 66 onto the rods 62 on the joint 54 of the scissors joint 61.

Vibrations in and against the depth direction 10 on the ceiling busbar 3 are thus absorbed and damped by the spring 70. The damping effect can be adjusted by turning the adjusting nut 69, which determines a distance 71 of the ceiling busbar 3 in the height direction 10 of the scissors hinge 61.

Claims

claims

1. Device (4) for compensating a change in length of a carrier body (22) held rail (3), in particular busbar in a direction of change in length (6), comprising:

a first body part (24) having a support body interface (26) for

Connection to the support body (22),

a second body part (27) with a rail interface (29) for connection to the rail (3), and

a guide over which the first body part (24) and the second

Body part (27) against each other movably mounted in a guide direction with a direction component in the direction of change in length (6) are stored.

2. Device (4) according to claim 1, wherein the guide a first to the first body part (24) fixed guide member (42, 52) and a second to the second body part (27) stationary guide member (44, 52) each having a sliding surface (43 , 45) for slide bearing, which are shielded from an environment.

3. Device (4) according to claim 2, wherein the guide comprises a hinge element (54) and at least one of the sliding surfaces (43, 45) is arranged in the hinge element.

4. Device (4) according to claim 3, wherein the guide is a

Articulated element (54) comprising scissors joint (61), on which the first guide member (52) and the second guide member (52) in a line

are held opposite.

5. Device (4) according to claim 4, wherein the first body part (24) held two via a spacer (55) at a distance from each other in parallel

Comprising plates (48, 56), and wherein the first guide member (52) is a bolt-like member which holds the scissor hinge (61) between the two plates (48, 56).

6. Device (4) according to claim 5, wherein on one of the plates (48, 56), the support body interface (26) is arranged.

A device (4) according to claim 5 or 6, wherein the first body part (24) comprises a guide member (57) held at an angle to the plates (48, 56) and adapted to move the rail (3) in the length change direction (6 ) respectively.

8. Device (4) according to one of the preceding claims, wherein the second

Body part (27) comprises a damping device (63) which is adapted to attenuate movements of the rail (3) in a damping direction (10) at an angle to the direction of change in length (6).

9. Device (4) according to claim 8, wherein the guide and the

Rail interface (29) in the damping direction (10) seen with a variable distance (71) spaced from each other.

10. Device (4) according to claim 8 or 9, wherein the damping of the

Damping device (63) seen from the guide in the direction of the rail interface (29) is designed to act.