SLIDING GUIDE SHOE FOR AN ELEVATOR

Abstract

A sliding guide shoe for an elevator has a guide shoe housing and an insert inserted into the guide shoe housing for guiding an elevator car or a counterweight. In order to positionally secure the insert, the insert has profiled pins that engage in bores in the guide shoe housing. In order to form the profiling, the pins each have radially outwardly directed ribs or projections that are distributed evenly over the circumference.

Claims

1-12. (canceled)

13. A sliding guide shoe for an elevator to guide an elevator car or a counterweight, the sliding guide shoe having a guide shoe housing and an insert inserted into the guide shoe housing, the sliding guide shoe comprising: a bore formed in the guide shoe housing for positionally securing the insert; and the insert having a pin that engages in the bore, wherein the pin includes profiling.

14. The sliding guide shoe according to claim 13 wherein the insert has multiple parts including a sliding element for sliding contact with a guide rail of the elevator and a damping element, the having a buffer element associated with the damping element.

15. The sliding guide shoe according to claim 14 wherein the buffer element has a profiled outer contour.

16. The sliding guide shoe according to claim 13 wherein the pin has a profiled outer contour formed by indentations or elevations.

17. The sliding guide shoe according to claim 13 wherein the pin has a star-shaped cross-section forming the profiling.

18. The sliding guide shoe according to claim 13 wherein the pin has knurling on a lateral surface forming the profiling.

19. The sliding guide shoe according to claim 13 wherein the profiling of the pin extends in an axial direction of the pin.

20. The sliding guide shoe according to claim 19 wherein the profiling is formed by radially outwardly directed ribs or projections which are distributed evenly over a circumference of the pin.

21. The sliding guide shoe according to claim 20 wherein the ribs or the projections each have a trapezoidal shape in cross-section.

22. The sliding guide shoe according to claim 20 wherein the ribs or the projections are arched radially at an outer circumference of the pin.

23. The sliding guide shoe according to claim 13 wherein the pin is chamfered or rounded in a region of a front edge such that the pin can be easily inserted into the bore of the guide shoe housing.

24. The sliding guide shoe according to claim 13 wherein the pin is tubular.

25. The sliding guide shoe according to claim 13 wherein the insert is a two-part insert having a sliding element and a damping element, wherein the pin is formed by an annular buffer element on the damping element and a retainer cam, the buffer element having the profiling on an outside and a hole on an inside, and the sliding element having the retainer cam that is accommodated in the hole.

26. A sliding guide shoe for an elevator to guide an elevator car or a counterweight, the sliding guide shoe having a guide shoe housing and an insert inserted into the guide shoe housing, the sliding guide shoe comprising: two bores formed in the guide shoe housing for positionally securing the insert; and the insert having two pins, each of the pins engaging in an associated one of the bores, wherein each of the pins includes profiling.

Description

DESCRIPTION OF THE DRAWINGS

[0026] Additional advantages and individual features of the invention can be derived from the following description of an embodiment and from the drawings. In the drawings:

[0027] FIG. 1 is a perspective view of a sliding guide shoe according to the invention,

[0028] FIG. 2 shows a damping element of the sliding guide shoe according to FIG. 1 in an enlarged perspective view, and

[0029] FIG. 3 is a top view of a pin of an insert of the sliding guide shoe accommodated in a bore of a sliding guide shoe housing according to FIG. 1 in a greatly enlarged partial view.

DETAILED DESCRIPTION

[0030] FIG. 1 shows a sliding guide shoe denoted by 1 for an elevator (not shown here) for transporting people or goods. The elevator can be an elevator car which is vertically guided in an elevator shaft so that it can move up and down between two guide rails (not shown) as linear guides. At least the sliding guide shoe, described in detail below, for guiding the elevator car can be arranged on each side of the elevator car. For optimal guidance, elevator cars usually have four (two per side) or more sliding guide shoes. Likewise, a counterweight (also not shown), which is connected to the elevator car via suspension means in the form of cables or belts, can have these sliding guide shoes for guiding the counterweight on counterweight guide rails.

[0031] The sliding guide shoe associated with the elevator car or the counterweight can have a groove for guiding, which surrounds a blade of a guide rail associated with the elevator shaft. This blade can be an extension of a profile. The guide rail can be formed by a T-profile. The T-profile can be, for example, a solid steel profile produced by rolling. The guide rail can also consist of or have other metal materials (e.g. aluminum), production processes or profile shapes. For example, metal profiles produced by extrusion or rails bent from metal sheets can be used as guide rails.

[0032] As can be seen from FIG. 1, the sliding guide shoe 1 comprises a one-piece guide shoe housing 2 and an insert 3 inserted therein. The insert 3 is designed in two parts and has a sliding element 5 facing the guide rail as the inner insert part, and a damping element 4 as the outer insert part. The sliding element has sliding surfaces or regions which slide along the guide rail with little play when the car is traveling. The sliding element 5 is designed to be stiff compared to the damping element 4. For example, it is made of a plastics material characterized by a low coefficient of friction such as PTFE, UHMW-PE. A material with a low stick-slip tendency is preferred, i.e. a small or minimal difference between sliding and static friction. Such sliding elements could also be used as guide rails in the case of little-oiled or unoiled rails and in particular sheet metal rails.

[0033] For example, a resilient plastics material, in particular a thermoplastic elastomer (TPE) or a plastics material made from cross-linked elastomers, can be used for the damping element 4. The damping element 4 can be made, for example, of SBR, TUR, TPU, EPDM, NBR, NR. It is also conceivable to use foamed damping elements. Advantageously, materials are to be preferred for the damping element 4 which are stable against rail oil.

[0034] The guide shoe housing 2, the channel-like receptacle, which forms the previously mentioned groove, of which housing the insert 3 is inserted, is connected to the elevator car or the counterweight. In the present embodiment according to FIG. 1, the guide shoe housing 2 is designed as a comparatively simple U-shaped metal profile in cross-section.

[0035] The guide shoe housing 2 has two mutually opposing parallel side wall portions 17 and a bottom portion 18 which connects the side wall portions. The bottom portion 18 and the side wall portions 17 which project away from the bottom portion at right angles form a “U”, as can be seen in section. In the embodiment according to FIG. 1 it is further illustrated by way of indication and example that one of the side wall portions 17 is lengthened to form a fastening region 19 with regard to the connection to the elevator car or to the counterweight. However, instead of the simple U-profile shape, the guide shoe housing could also have other shapes; for example housing shapes such as those known and familiar to a person skilled in the art from DE 203 15 915 U1, for example.

[0036] In order to positionally secure the insert 3, the guide shoe housing 2 has two mutually opposing bores 7 which are arranged in the parallel side wall portions 17 of the guide shoe housing, in which bores each a pin 6 engages. The pin 6 consists of an annular buffer element 8 associated with the damping element 4 and a retainer cam 13 associated with the sliding element 5, the retaining cam 13 being accommodated in the hole of the buffer element 8 denoted by 12 in FIG. 2. The buffer element 8 of the pin 6 has a profiled outer contour that is created by elevations and forms a star. The vibration isolation achieved with this profiled pin 6 can meet high demands with regard to travel comfort in a simple and cost-effective way. The profiled pin 6 described below in detail is not only advantageous for the two-part inserts for sliding guide shoes. A pin 6 profiled in this way or similarly could also be used for sliding guide shoes having one-piece inserts, i.e. inserts that consist only of the sliding element and manage without a damping element. In this case the sliding element would be equipped with the profiled pins.

[0037] It can be seen from FIG. 2 that the damping element 4 has a U-shaped profile body 10. The damping element 4 can, for example, be an injection molded part.

[0038] Two buffer elements 8 are formed on the profile body 10 and form a one-piece, monolithic component therewith. The relevant pin 6 has a star-shaped cross-section for forming the profiling. The profiling of the pin 6, which extends in an axial direction, has radially outwardly directed projections 11 which are distributed evenly over the circumference. The projections 11 extend in the axial direction. Instead of the straight course shown in the embodiment, the projections 11 and thus the profiling could also have a helical course. The pins 6 are chamfered so that they can be easily inserted into the bores 7 in the region of its front edge.

[0039] More details on the design of the pin 6 of the insert can be seen in FIG. 3. From this it can be clearly seen that the projections 11 of the star-shaped buffer each have a trapezoidal shape in cross-section. As can be seen, the trapezoid in the present case is an isosceles trapezoid. The projections 11 each have two mutually opposing side flank portions 14 and the two side flanks 14 have interconnecting head portions 15 which define the short base sides of the trapezoids. However, the head portions 15 are not designed to be straight in cross-section, but instead have a complementary arched shape so that they can be favorably accommodated in the round bore 7 in a form-fitting manner. The retainer cam 13 of the sliding element 5 is designed here as a solid cylinder.

[0040] In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.