Title of Invention

MOVABLE BEARING FOR A SLIDE

Abstract

ABSTRACT "MOVABLE BEARING FOR A SLIDE" Movable bearing for a slide (9) guided on two shafts (4), with a linear bearing (3) guided on one of the shafts (4) and a bearing housing (2) that accommodates the linear bearing (3) and is connected to the slide (9) by a connector (1), characterized in that the bearing housing (2) comprises two laterally projecting pins (12, 13) lying transverse to the longitudinal direction of the respective shaft (4) and within to the shaft plane (7) defined by the axes (5,6) of the shafts (4), which are arranged in axially sliding fashion in guides (14, 15) of the connector (1) located on the slide of the bearing housing (2), so that the bearing housing (2) is movable transverse to the longitudinal direction of the respective shaft (4). 12

Full Text

FORM 2 THE PATENTS ACT 1970 [39 OF 1970] & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION [See Section 10; rule 13] "MOVABLE BEARING FOR A SLIDE" IGUS SPRITZGUSSTEILE FUR DIE INDUSTRIE GMBH, of Spicher Str. la, 51147 Koln, Germany The following specification particularly describes the invention and the manner in which it is to be performed: GRANTED 13-7-2005 13 JUL 2005 1 Movable bearing The invention relates to a movable bearing for a. silide guided on two shafts, with a linear bearing guided cam .one of the shafts and a bearing housing that accommodates the linear bearing and is connected to the slide by a connector. Because the slide is guided by at least one bearing on the-one shaft, and by at least one bearing on the other shaft, the bearing of one of the; shafts is expediently designed as a movable bearing that can compensate for the parallelism errors of the two shafts. A movable bearing of the kind described in the opening paragraph is disclosed in US 5 388 913 A. the connector connecting this movable bearing to the slide includes a rearing block for a spherical bearing which is mounted on the rearing housing of the linear bearing at its side adverted from the shaft. Furthermore, the connector comprises; a support late with yoke extensions through which a bolt passes. The olt extends through the spherical bearing so that this learing is movable together with the bearing block and the tearing housing for the linear bearing fixed to the bearing lock transversly to the longitudinal direction of the shaft. he bearing housing of the movable bearing disclosed in DE 198 5 974 C is connected to the slide by a fork like coupling. At he upper side of the bearing housing a ball is inserted into bore, the ball running on the shaft guiding the movable 2 bearing. At the lower side, the bearing housing is milled out to such an extent that the shaft is unencumbered. The' slide comprises a prismatic groove in its upper fork part in which the ball runs. The lower fork part is formed by a leaf spring which reciliently abuts against the shaft and presses the upper fork part on the ball. The movable bearing disclosed in FR 2534521 A comprises a bearing housing which is slidably arranged within an opening in the connector between the bearing housing and the slide transversly to the longitudinal direction of the shaft and within the shaft plane defined by the two shafts. By means of this design the side surfaces of the bearing housing parallel with respect to the plane defined by the two shafts slide on respective surfaces of the opening. The object of the present invention is to further devolp a movable bearing of the kind described in the opening paragraph, such that the bearing offers a long service live, precise guidance of the slide parallel to the plane defined by the two shafts, relatively little assembly effort and a compact design. According to the invention the object is solved in that a movable bearing of the kind described in the opening paragraph comprises two laterally projecting pins, lying transverse to the longitudinal direction of the respective shaft and within the shaft plane defined by the axes of the shafts, which are arranged in axially sliding fashion in guides of the connector located on the side of the bearing housing so that the bearing housing is movable transverse to the longitudinal direction of the respective shaft. Because of the lateral arrangement of the connector with respect to the bearing housing an extremly compact design of 3 the movable bearing is achieved. By means of the pins laterally mounted on the bearing housing and the corresponding guides, the assembly effort and the assembly costs can be reduced significantly. The linear bearing for the movable bearing according to the invention can be any of the conventional types of linear bearings, particulary sliding or ball bearings. The movable bearing according to the invention can be connected to all standard sizes of linear bearings. In order to be able to compensate for parallelism errors both in the shaft plane and also perpendicular to it, the connector in a preferred configuration of the invention is designed such that the bearing housing is mounted in pivoting fashion about an axis running transverse to the longitudinal direction of the shafts and parallel to the shaft plane. In order for the bearing housing to additionally be mounted in pivoting fashion around the guide axis the pins are of cylindrical- design and pivot in the guides. The connector can have a mounting plate for mounting on a base plate of the slide, where the guides for mounting the bearing housing are located on the mounting plate. For example, the mounting plate can be mounted on the base plate of the slide with the help of screws. However, the guides can also be located directly on the base plate of the slide, so that the connector only encompasses the guides' and the linear or pivot mount of the bearing housing. In particular, the linear bearing of the movable bearing according to the invention can be designed as a plastic sliding bearing. The commercially available sliding bearings 4 that correspond to the standard sizes can be used in this context. The bearing housing of the movable bearing according to the invention can have an essentially cylindrical, closed space for receiving the essentially cylindrical linear bearing. A design of this kind can be considered when the ends of the two shafts are held by supports outside the range of motion of the slide. Ef the supports extend over the range of motion of the slide on one side of the shafts, the bearing housing has an essentially cylindrical space with a longitudinal slit for receiving an essentially cylindrical linear bearing that also las a longitudinal slit. In this context, the longitudinal slits serve to receive the area in which the support is :onnected to the respective shaft. he invention further relates to a slide, which is guided by a irst and second shaft and has at least one bearing associated ith the first shaft and at least one movable bearing ssociated with the second shaft. The movable bearing is esigned in accordance with the present invention. preferred configuration of the slide is provided with two earings associated with the first shaft, which have bearing usings that are stationary relative to the slide, and one vable bearing according to the invention associated with the cond shaft, which is located at roughly half the distance tween the two fixed bearings. der certain circumstances, several movable bearings cording to the invention associated with the second shaft n be used on the slide. 5 Several practical examples of: the invention are described below on the basis of the drawings. The drawings show the following: Fig. la A partially cut-away front view of a first practical example of the movable bearing, Fig. lb A side view of the bearing in the direction of arrow B in Fig. la, Fig. 1c A top view in the direction of arrow C in Fig. la, Fig. 2a A partially cut-away front view of a second practical example, Fig. 2b A side view of the bearing in the direction of arrow B in Fig. 2a, Fig. 2c A top view in the direction of arrow C in Fig. 2a, Fig. 3a A front view of a slide guided on two shafts, with a movable bearing according to Figs. 2a-c, Fig. 3b A side view of the slide in the direction of arrow B in Fig. 3a, Fig. 3c A side view of the slide in the direction of arrow C in Fig. 3a, As shown in Figs, lb to 2c of the three practical examples described, the movable bearing has a bearing housing 2 which is connected to the slide (cf. Figs. 3a to 3c) by a connector 1 and accommodates linear bearing 3. 6 As described in detail below, connector 1 is designed such that ' bearing housing 2 is mounted in movable fashion transverse to the longitudinal direction of the respective shaft (cf. reference number 4 in Fig. 3b) and parallel to the shaft plane (cf. reference number 7 in Fig. 3a) defined by the axes (cf. reference numbers 5 and 6 in Figs. 3a to, 3c) of shafts 4. Connector 1 is further designed such that bearing housing 2 is mounted in pivoting fashion about an axis 8 running transverse to the longitudinal direction of shafts 4 and parallel to shaft plane 7. Connector 1 consists of a mounting plate 16, on which guides 14 and 15 are integrally moulded on either side of bearing housing 2. In the practical example shown in figures la- lc, the bearing housing 2 comprises two the laterally arranged, cylindrical pins 12 and 13, which are slidably and pivotably supported in the guides 14 and 15. The pins 12 and 13 lie in the centre axis 24 of the bearing housing 2 which runs transvers to the longitudinal direction of the bearing housing 2 and parallel to the mounting plate 16. Guides 14 and 15, which are integrally moulded on mounting plate 16 to the sides of bearing housing 2, have corresponding openings in which pins 12 of bearing housing 2 are mounted such that they can slide in the longitudinal direction of centre axis 24 and pivot around this axis. Bearing housing 2 is supported by guides 14 and 15 such that the bottom side 19 of bearing housing 2 is at a distance from base plate 16 when bearing .housing 2 is parallel to base plate 16.., This distance, which can be kept relatively small, limits the pivoting angle of- bearing housing 2 relative to base plate 16. 7 In the practical example shown in Figs, la to lc, bearing housing 2 has a cylindrical, closed space 21 for receiving a likewise cylindrical linear bearing 3. This bearing is therefore suitable for shafts mounted on a support outside the range of motion of the slide. Figures 2a to 2c show a third practical example that differs from the practical example shown in Figs. la to lc only in that bearing housing 2 has a longitudinal slit 22 on the side opposite base plate 16. Linear bearing 3 located in bearing housing 2 is provided with a corresponding longitudinal slit 23. A bearing of this kind is suitable for shafts held in place by a support extending in the longitudinal direction below the shaft, as shown in Fig. 3a. Figures 3a to 3c show an arrangement consisting of two essentially parallel shafts 4 and a slide 9 guided on them. Shaft 4 shown on the left in Fig. 3a is associated with two bearings (as shown particularly clearly in the side view in Fig. 3c) that are permanently connected to slide 9 and consist of a block-type bearing housing 25 and a linear bearing 3. Shaft 4 shown on the right in Fig. 3a is associated with a movable bearing according to the practical example shown in Figs. 2a to 2c. As shown in Figs. 3b and 3c, this movable bearing is located at roughly half the distance between the two fixed bearing housings 25. Thus, it is capable of compensating for parallelism errors both in shaft plane 7 (cf. Fig. 3a) and perpendicular to shaft plane 7 when slide 9 moves. As shown particularly clearly in Fig. 3a, the bottom sides of shafts 4 are provided with integrally moulded supports 2 6 extending over their length, so that bearing housings 2 and 25, and linear bearings 3 located therein, are provided with 8 Movable bearing List of reference ntunbers 1 Connector 2 Bearing housing 3 Linear bearing 4 Shaft 5 Axis 6 Axis 7 Shaft plane 8 Axis 9 Slide 10 Shaft 12 Pin 13 Pin 14 Guide 15 Guide 16 Mounting plate 19 Bottom side 21 Cylindrical space 22 Longitudinal slit 23 Longitudinal slit 24 Centre axis 25 Bearing housing 26 Support 9 WE CLAIM: 1. Movable bearing for a slide (9) guided on two shafts (4), comprising a linear bearing (3) guided on one of the shafts (4) and a bearing housing (2) that accommodates the linear bearing (3) and is connected to the slide (9) by a connector (1), characterized in that the bearing housing (2) comprises two laterally projecting pins (12, 13) lying transverse to the longitudinal direction of the respective shaft (4) and within to the shaft plane (7) defined by the axes (5,6) of the shafts (4), which are arranged in axially sliding fashion in guides (14, 15) of the connector (1) located on the slide of the bearing housing (2), so that the bearing housing (2) is movable transverse to the longitudinal direction of the respective shaft (4). 2. Movable bearing as claimed in claim 1, wherein the connector (1) is shaped such that the bearing housing (2) is mounted in pivoting fashion about an axis (8) running transverse to the longitudinal direction of the shafts (4) and within the shaft plane (7). 3. Movable bearing as claimed in claim 1 to 2, wherein the pins (12, 13) are of cylindrical shape and mounted in the guides (14, 15) in pivoting fashion around the cylinder axis. 4. Movable bearing as claimed in one of claims 1 to 3, wherein the connector (1) has a mounting plate (16) for mounting on a base plate of the slide (9), which bears the guides (14, 15) for mounting the bearing housing (2). 5. Movable bearing as claimed in one of claims 1 to 4, wherein the linear bearing (3) is designed as a plastic sliding bearing. 10 6. Movable bearing as claimed in one of claims 1 to 5 wherein the bearing housing (2) has an essentially cylindrical, closed space (21) for receiving and essentially cylindrical linear bearing (3). 7. Movable bearing as claimed in one of claims 1 to 5, wherein the bearing housing (2) has an essentially cylindrical space (21) with a longitudinal slit (22) for receiving an essentially cylindrical linear bearing (3) that likewise has a longitudinal slit (23), where the longitudinal slits (22, 23) are designed to receive a support (26) for the respective shaft (4). 8. Movable bearing as claimed in any of the preceding claims, wherein the said movable bearing is provided for slide which is guided by a first and second shaft (4) and has at least one bearing associated with the first shaft (4) and at least one movable bearing associated with the second shaft (4). Dated this 3rd day of February, 2003 ATTORNEY FOR THE APPLICANTS 11

Documents:

164-mumnp-2003-abstract(13-07-2005).doc

164-mumnp-2003-abstract(13-07-2005).pdf

164-mumnp-2003-cancelled pages(13-07-2005).pdf

164-mumnp-2003-claims(granted)-(13-07-2005).doc

164-mumnp-2003-claims(granted)-(13-07-2005).pdf

164-mumnp-2003-correspondence(13-07-2005).pdf

164-mumnp-2003-correspondence(ipo)-(11-09-2007).pdf

164-mumnp-2003-drawing(13-07-2005).pdf

164-mumnp-2003-form 1(13-07-2005).pdf

164-mumnp-2003-form 19(07-06-2004).pdf

164-mumnp-2003-form 2(granted)-(13-07-2005).doc

164-mumnp-2003-form 2(granted)-(13-07-2005).pdf

164-mumnp-2003-form 3(03-02-2003).pdf

164-mumnp-2003-form 3(13-07-2005).pdf

164-mumnp-2003-form 5(03-02-2003).pdf

164-mumnp-2003-petition under rule 137(13-07-2005).pdf

164-mumnp-2003-petition under rule 138(13-07-2005).pdf

164-mumnp-2003-power of authority(13-07-2005).pdf

164-mumnp-2003-power of authority(20-03-2003).pdf

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