SE512830C2 - Grab arrangement adapted for cooperation with railway sleepers. - Google Patents

Abstract

The invention relates to a railroad sleeper gripping arrangement (10) that has a frame part (11) on which clamping jaws (12, 12a) are pivotally mounted for movement towards and away from each other, said clamping jaws being adapted for co-action with mutually opposite side parts (3a, 3b) of a railroad sleeper. The gripping arrangement also includes means (20, 20') for securing the frame part (11) to a chassis (30). The means (20, 20', 40) are constructed so that said frame part (11) will be pivotal (v) to some extent relative to the chassis (30) and to enable the clamping jaws (12, 12a) to be adapted to said surface parts (3a, 3b).

Description

512 830 -z- In the said publication, the use of a gripper arrangement (20) is indicated, which is centrally located, and with associated clamping jaws adapted to be able to cooperate with detached, upwardly converging, surface portions within the central area of the railway grinder.

The clamping jaws are here hydraulically actuated by a piston-cylinder arrangement and can from this arrangement assume a position cooperating and clamping with the railway sleeper or a position exposing a railway sleeper.

The prior art in this respect also includes the gripper arrangements shown and described in the following patent publications. w - 53-3-2 2Q1 155.

Here, a mobile machine is shown and described for an exchange of old railway sleepers for new ones by utilizing clamping jaws arranged from and towards each other (36).

Here, a sleeper removal unit (25) is used, which is rotatably related about a vertical axis (72) by means of a drive means (71), attached to a transport carriage (38), adapted for a longitudinal movement along rails (70) on a additional frame (29) by means of a drive means (37).

A framework (96) carries a gripping arrangement (84,86), comprising said gripping or clamping jaws, for a co-operation with one end portion of the railway sill (8) and with which frame (91) the railway sill (8) can be pulled out of its position during the railway rails (l0) to an exposed position outside the railway rails sections.

With the aid of different axes of rotation, an extended and removed railway sill (8) can now be rotated completely next to the railway rail (10) and moved to a transport device. 512 850 _3_ n5_a_4 529 Q fi g A mobile machine is also shown and described here, which by means of a gripping arrangement with gripping surfaces or clamping jaws (85 ', 86'), is adapted to be able to co-operate with one end portion of a railway sill (To) and with a framework, the railway awning can be pulled out of its position under the railway rails (R) to an exposed position in the same way as above.

Here it is indicated that the gripping surfaces (85 ', 86') are rotatably related to the chassis at their upper parts and via each piston-cylinder arrangement (88 ', 89') can be actuated to a gripping or releasing position of a railway sill. u HU IEKElSKI_BBQBLEM Considering the fact that the technical considerations that a professional in the relevant technical field must make in order to offer a solution to one or more technical problems posed is initially an insight into the measures and / or the sequence of measures to be taken on the one hand, a choice of the means or means required and in view of this, the subsequent technical problems should be relevant in the production of the present object of the invention.

Considering the prior art, as described above, it would appear to be a technical problem to be able to create a gripping arrangement by simple means, which can be made to grip, hold and / or lift a railway grinder loosely placed on a prepared surface within the central area of the railway grinder. even when it occupies one or more oblique positions, in relation to a correct position related to laid-out railway track sections.

There is also a technical problem in being able to designate a gripper arrangement, which must be able to adjust its horizontal setting position obliquely, in order to be able to grip a loosely 512 830 -4-placed railway grinder within its central area when the railway grinder is inclined in relation to a horizontal plane. .

There is also a technical problem in being able to designate a gripping arrangement which can grip a loosely placed railway grinder so that the means belonging to the gripping arrangement can be forced to assume a correct position, when it is slightly rotated about a longitudinal axis.

There is also a technical problem in being able to design a gripping arrangement which, via clamping jaws, can turn a railway grinder oriented in the horizontal plane towards a position oriented parallel to the other previously attached railway grinders and perpendicular to the railway rail sections only by using the clamping jaws and sufficiently cylinder arrangement, suitably adapted for hydraulic operation.

There is then a technical problem in being able to realize the significance of and the advantages associated with having a frame portion utilized for a gripper arrangement of the associated kind, to which clamping jaws movably arranged towards and from each other are related, and a means for be able to hold said frame portion to a chassis, and thereby be able to realize the significance of and the advantages associated with allowing said means to be shaped so that said frame portion becomes slightly pivotally attached to said chassis, in one or two perpendicular directions, to thereby offer a adaptation of the clamping jaws to the surface portions of the detached railway sleeper.

In addition, it should be considered a technical problem to be able to realize the significance of allowing the said pivotable attachments to be active around their respective horizontal axes, but with the axes forming a right angle with each other and located in different planes.

There is also a technical problem in being able to realize the significance of and the advantages associated with allowing the said 512 830 _ 5 _ to consist of double bearing arrangements, one part of which, for each, is fixedly related to the chassis and the other part is fixedly related to the frame part, and where the parts of the bearing arrangement are rotatably related to each other about a horizontal axis.

There is also a technical problem in being able to realize the significance of having said rotatability about the horizontal axis limited to an angle of less than +/- 202 There is also a technical problem in being able to realize the significance of allowing said means may be constituted by a rotatable attachment of a piston-cylinder arrangement, operative between said chassis and said frame portion, in order to be able to raise or lower the frame portion with associated clamping jaws.

There is also a technical problem in being able to realize the significance of and the advantages associated with the fact that in the case of two parallel-related, for raising or lowering the frame portion with the clamping jaws, piston-cylinder arrangement, at least one of said arrangements be rotatably mounted about a horizontal axis of rotation.

There is also a technical problem in being able to realize the importance of allowing said clamping jaws to be movably arranged towards or from the railway sleeper by means of two parallel piston-cylinder arrangements, in order to be able to turn the railway sleeper into a movement of the clamping jaws. position perpendicular to a longitudinal extent assigned to a railway track section and thus orient it parallel to already attached railway sleepers.

There is also a technical problem in being able to realize in addition that each of said clamping jaws must be assigned a length, relative to the longitudinal extent of the railway grinder, of between 5 and 50% of the total length of the railway grinder. 512 830 _6- H In order to be able to solve one or more of the above-mentioned technical problems, the present invention now proceeds from a gripper arrangement adapted for a railway grinder, having a frame portion, to which clamping jaws are rotatably attached to and spaced apart from each other. , adapted for a cooperation with the discontinued center-related railway sleeper assigned surface portions, and means for being able to hold said frame portion to a chassis.

In such a gripping arrangement, the present invention now specifically directs that said means should be so shaped that said frame portion can be slightly pivotally attached to said chassis in order thereby to be able to offer an adaptation of the clamping jaws towards said surface portions and that said means can be of double bearing arrangements, between the chassis and the frame part, where one part of the bearing arrangement, for each one, is fixedly related to the chassis and the other part of which is fixedly related to the frame part.

As proposed embodiments, falling within the scope of the inventive concept, it is indicated that this rotatability of the bearing arrangements should be limited to an angle of at most +/- 20 °.

The invention further indicates that said means may consist of a rotatable attachment to the frame part of each piston-cylinder arrangement, operative between said chassis and said frame portion and intended to be able to raise or lower the frame portion with the clamping jaws from or against the underlying railway sill.

The invention also indicates the use of two such, parallel-related, piston-cylinder arrangements, in which case only one need be rotatably attached to the chassis.

The clamping jaws are furthermore movably arranged towards and away from each other by means of two parallel-related piston-cylinder arrangements, in order thereby to be able to increase the clamping action between the clamping jaws and the surface portions belonging to the railway sleepers.

It is further indicated that each of said clamping jaws shall be assigned a length, relative to the longitudinal extent of the railway grinder, of between 5 and 50% of the length of the railway grinder.

It is further indicated that the parts of the bearing arrangements shall be rotatably related to each other about a horizontal axis of rotation.

"The advantages which can mainly be considered to be characteristic of a gripping arrangement, in accordance with the present invention, are that in this way conditions have been created for, for example in an application within a previously known mobile unit, also a loose obliquely placed on a preparation surface. railway grinders must be able to be gripped within the central area of the gripping arrangement and by the movement of the clamping jaws be able to be turned to a position perpendicularly oriented relative to the railway rail sections, so that in such a predetermined position it can be lifted to an abutment towards the underside position, by means of fastening devices, can be fastened to the railway rail sections.

What can primarily be considered as characteristic of a gripping arrangement, in accordance with the present invention, is stated in the characterizing part of the appended claim 1.

A presently proposed embodiment of a gripper arrangement having the features significant with the present invention will now be described in more detail with reference to the accompanying drawing, in which; figure 1 shows in perspective view parallel railway rail sections placed and attached to parallel oriented railway sleepers with a loosely placed railway sleeper oriented obliquely in all observable respects, figure 2 shows in side view a gripping arrangement according to the present invention with the clamping jaws in a fully open position and with a railway grinder of a first embodiment, figure 3 shows in side view a gripping arrangement according to the present invention with the clamping jaws in a fully clamped position for a cooperation with spaced-apart surface portions for a railway liper of a second embodiment and figure 4 shows in another side view the gripping arrangement according to figures 1 and 2.

H H _.

Thus, with reference to Figure 1, there is shown in perspective view a railway section 1, where a first 2 and a second 2a railway rail section rest against a number of railway sleepers.

The railway sleepers are attached to the railway rail sections 2, 2a in a previously known manner by means of specially shaped clips via means not shown.

A mobile unit not shown in Figure 1, for example of the nature shown and described in the international patent application PCT / SE94 / 01042, with a centrally located gripper arrangement 10, shall now grip a loose place on a base 4 row rail grinder 3 by allowing gripping arrangements belonging to 512 830 -9- clamping jaws 12, l2a to co-operate with set-off center-oriented, upwardly tapering, surface portions 3a, 3b.

Figure 1 is intended to illustrate that the loosely placed sleeper 3 deviates from a final position, which will be required when fastening the sleeper 3 to the railway rail sections 2, 2a by means of known fastening devices or clips in a later working operation.

The latter work operation does not form part of the present invention and will therefore not be described in more detail either.

If, for simplicity, it is assumed that the distal left end portion 3 'of the grinder 3 assumes a correct position for attachment to the railway rail section 2, Figure 1 illustrates that the front right end portion 3 "on the one hand is lower, a distance" ï fl than the correct position, which will be required for a interaction with the railway rail section 2a.

Furthermore, it can be seen from Figure 1 that the end portion 3 "in addition a distance%" is displaced from the adjacent railway grinder (3) and that the loose railway grinder 3 thus deviates from a parallel orientation towards the railway grinder (3).

Furthermore, the loose railway sleeper 3 can also be slightly rotated about an axis of rotation 3c, according to the arrows '% ¶ in one direction or the other For the sake of completeness it should also be mentioned that the loose railway sleeper 3 can also assume a deviation in the direction'¶', but then a compensation for this deviation will take place by means other than those proposed according to the present invention, these means will not be described in more detail and this deviation will not be taken into account either.H1 | 512 850 -1o- The adjustment of the deviation HV can be made by by means of a piston-cylinder arrangement (assigned the reference numeral 20f) in a manner shown in more detail in Figure 5 with accompanying text in the international patent application PCT / SE97 / 00830.

Referring to Figures 2, 3 and 4, there is thus shown a gripping arrangement 10 adapted for a railway grinder 3, and this gripping arrangement has a frame portion 11, to which is rotatably attached to and mutually movably arranged, clamping jaws 12, 12a, adapted for a cooperation with detached railway sleeper assigned surface portions 3a, 3b. The clamping jaw 12 is rotatably attached to an arm 13 via a shaft 12 ', and thus the clamping jaw 12 can adapt its abutment, via a rubber plate, to the surface 3a and its inclination.

The arm 13 is within its central area, via a shaft 14, attached to a stirrup 15 belonging to the frame portion 11. The upper portion 13a of the arm 13 is rotatably attached via a shaft 16 'to a first end of a piston-cylinder arrangement 16.

The opposite clamping jaw 12a is similarly rotatably attached 12a 'to an arm 13', the upper portion 13a of which rotatably cooperates 16 "with the other end of the piston-cylinder arrangement 16.

The present invention also provides a means 20 for being able to hold said frame portion 11 with clamping jaws 12, 12a to a chassis 30.

Referring to Figure 3, it is illustrated that the clamping jaws 12, 12a of the piston-cylinder arrangement 16 are brought to a position cooperating with the sleeper 3 and with the piston-cylinder arrangement 16 in an expanded position or extended position.

The embodiment is now based on said means 20 being constituted by double bearing arrangements 20, 20 '(figure 4), one part 21, 21' of which is, for each, fixedly related to the chassis 512 850 -11- 30 and second part 22, 22 'is fixedly related to the frame part 11 and where the parts 21, 22 resp. 21 ', 22' are rotatably related to each other about a horizontal axis lf A "'The exemplary embodiment is further based on the rotatable attachment between the parts 21, 22 and 21', 22 'being limited between mechanical stops and effective, in the plane according to Figure 1 and Figure 3, at an angle of +/- 20 °. The angle is assigned the reference numeral'W 'in Figure 3.

The bearing arrangements 20, 20 'may advantageously consist of known radial-joint bearings, * which allow an angle of rotation "v" of 5-20 °.

However, it would be most convenient to select a bearing where the angle of rotation WW is limited to between 6 and 12 °, such as about 10 °. Referring to Figure 4, the gripping arrangement 10 is shown in another side view. The frame portion 11 with the clamping jaws 12, 12a and the chassis 30 cooperate with each other by means of a complementary means. Here it is shown that said means can also be constituted by a rotatable attachment 40 of a piston-cylinder arrangement 41, operative between said chassis 30 and said frame portion 11.

The piston rod of the piston-cylinder arrangement 41 cooperates with a radial-joint bearing 20 'while the arrangement 42 cooperates with a similar bearing 20.

Figure 4 further shows the use of two parallel-related piston-cylinder arrangements 41, 42, serving as lifting or lowering means for the clamping jaws 12, 12a and the frame portion 11 and the exemplary embodiment shows that only the piston-cylinder arrangement 41 has a rotatable attachment to the reference numeral 40. Figure 4 further shows that said clamping jaws 12, 12a are movably arranged towards or from each other by means of two parallel piston-cylinder arrangements 16, 16 '.

Each of said clamping jaws 12, 12a is assigned a, relatively longitudinal extent of the railway grinder, length ïf of between 5 and 50% of the length of the railway grinder.

Preferably, the length Wf should be selected to 10-30%, such as 15-20%.

For shorter lengths, the clamping surfaces of the clamping jaws with rubber coatings can be chosen flat, for longer lengths it may be appropriate to allow the clamping surfaces to be curved to a corresponding degree as the surface portions 3a, 3b of the railway grinder are curved.

For longer lengths, the distance between the piston-cylinder arrangements 16, 16 'can also be increased.

From the embodiment of the gripping arrangement, according to Figures 2-4, it is thus shown that a deviation of the position of the loose grinder 3 in the direction will be compensated in the first place by the piston-cylinder arrangement 41, which is rotatably arranged about the shaft 40, and that thereby an inclination of the frame portion 11 with the clamping jaws 12, 12a is offered, so that a frame surface 11a belonging to the frame portion can be brought into abutment against the upper surface 3d of the grinder 3.

Thereafter, the clamping jaws 12, 12a are brought to a position cooperating with the surfaces 3a, 3b, according to Figure 3, and during this movement a compensating movement of the railway grinder 3 will take place for the deviation '% ". The deviation in the rotation will also occur here. can be compensated for, mainly by pressing the support surface 11a against the upper surface 3d. 512 830 _13- In the event of a subsequent raising of the frame portion ll with the fixed railway grinder 3, the railway grinder 3 will be able to be pressed against the underside of the railway rail sections 2, 2a and attached via clips to said railway rail section at a predetermined position.

The invention is of course not limited to the embodiment stated above as an example, but may undergo modifications within the scope of the inventive concept illustrated in the following claims.

Claims (10)

l v 'el: 4 å _.:I:\._.._.._; »Liihinxl 512 830 _14- BBIEHIKBBI A gripper arrangement (10) adapted for a railway grinder, having a frame portion (11), to which clamping jaws (12, 12a) are rotatably attached, adapted for co-operation with the center-oriented rail sleeper assigned center surface portions (3a, 3b), and means (20) for holding said frame portion (11) to a chassis (30), characterized in that said means (20) is shaped so that said frame portion (11) becomes slightly pivotable. attached to said chassis (30) to offer an adaptation of the clamping jaws to said surface portions, that said means (20) further comprise double bearing arrangements (20, 20 '), one part of which (2l, 2l'), for each , is related to the chassis (30) and whose second part (22,22 ') is related to the frame part (ll). 2. Grip arrangement according to claim 1, characterized in that the rotatability of the bearing arrangement is limited to an angle of +/- ZOÉ 3. A gripping arrangement according to claim 1, characterized in that said means (20) consists of a rotatable attachment to the frame part (11) of each piston-cylinder arrangement (41,42), operatively between said chassis (30) and said frame portion (ll). 4. Grip arrangement according to claim 3, characterized in that in two parallel piston-cylinder arrangements (41, 42) only one (41) is rotatably attached (40) to the chassis (30). Gripper arrangement according to claim 1, characterized in that said clamping jaws (l2,12a) are movably arranged by means of two parallel piston-cylinder arrangements (l6, l6 '). 512 830 -15- Gripper arrangement according to claim 1 or 5, characterized in that each of said clamping jaws is assigned a length, relative to the longitudinal extent of the railway grinder, of between 5 and 50% of the length of the railway grinder. Gripper arrangement according to claim 1, characterized in that the bearing arrangement (20,20 ') of the means (20) consists of radial-joint bearings. Gripper arrangement according to claim 2, characterized in that the angular value is selected to 5-20 °, preferably 6-122 °. Gripper arrangement according to claim 6, characterized in that the length is selected to be 10-30%, preferably 15-20% of the length of the railway grinder. Gripper arrangement according to claim 1, characterized in that the parts of the bearing arrangement (21, 22; 21 ', 22') are rotatably related to the frame part (II).