US1803396A

US1803396A - Brake

Info

Publication number: US1803396A
Application number: US237375A
Authority: US
Inventors: Brie Ludger E La
Original assignee: Bendix Brake Co
Current assignee: Bendix Brake Co
Priority date: 1927-12-03
Filing date: 1927-12-03
Publication date: 1931-05-05
Anticipated expiration: 1948-05-05

Description

May' 5,11931. 1 E. LA 1,803,396

Filed-Dc. 3, 1927 lN'vENToR i I y LunagYR E. LABmE ATTORNEY Patented May 5, 1931 UNITED STATES PATENT OFFICE LUDGER E. LA BRIE, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COM- PAN Y, OF SOUTH BEND, INDIANA, A CORPORATION 0F ILLINOIS BRAKE Application led December 8, 1927. Serial No. 237,375.

This invention relates to brakes and is illustrated as embodied in an internal exanding brake for an automobile. An object of the invention is to provide a very effective brake which can be manufactured inexpensively.

Various features of novelty relate to the anchoring of the brake on a pair of devices arranged in a novel manner on opposite sides of the cam or its equivalent, and which also serve to hold a supporting bracket for the cam shaft, to various features of vconstruction of the brake shoes, to a novel positioning device for the shoes, and to other desirable details of construction which will be appartant from the following description of one illustrative embodiment shown in the accompanying drawing, in which:

Figure 1 is a vertical section through the brake, just inside the head of the brake drum, and showing the brake shoes in side elevation;

Figure 2 is a artial horizontal section on the line -2 2 of) Figure 1 and showing the anchorage of the brake; and

Figure 3 is a partial vertical section through the brake operating means on the line 3 3 of Figures 1 or 2.

In the illustrated arrangement the brake includes a rotatable drum 10, at the open side of which is arranged a stationary sup' port such as a backing plate 12, and Within which is arranged the friction means of the brake, which in this instanceincludes two novel brake shoes 14 connected by an adj ustable floating joint 16. The shoes 14 are forced apart to apply the brake, against the resistance of a return spring 18, by means such as a fioating cam 20 extended downwardly to form an operating arm secured by a pivot 22 to an arm 24 on a cam shaft 26 operated by a lever 28. The shaft 26 is journaled in a bearing formed by drawing tubular extensions on 'two

stampings

30 and 32 which are welded or otherwise secured to two plates 34 arranged on opposite sides of the backing plate 12.

According to one feature of the invention, the lates 34 forming the bracket for the cam shaft 26 are secured to the backing plate 12 by devices such as posts 36 havin collars 38 engaging the inner plate 34 an having threaded on their outer ends clmpinv nuts 40 seated against the outer plate 34, the devices 36 being extended through slotsV formed in the shoes 14 so that one of them servesY held by Cotter pins 46 to confine the shoe against lateral movement and guide them in their brake-applying movements.

One of the features of the invention relates to forming the brake shoes with the slots for the anchor posts 36. Preferably, each of the shoes is formed with a central. stiffening web which is slotted at its end at 50 to permit the assage of the anchoring posts 36. Reinforcing plates 52 on opposite sides of this web are also slotted for the passage of the anchoring posts and are spot welded to opposite sides of the web of the shoes, the reinforcing plates 52 having portions extending beyond the web and which are preferably unslotted. Thrust members 54 engaging the cam 20 have parts extending into the space between the reinforcing plates 52 into engagement with the ends of the webs of the shoes, and preferably have laterally ex Ytendingportions projecting across and eniging the ends .of the reinforcing plates 52.

embers 54 may be welded or otherwise secured to the shoes.

positioned on the backing plate and a strap I 66 pivotally connected by one end to the stud and having a bolt 68 in the other end` thereof engaging a slot 70 in the web of the shoe. These devices may be any desired form, as may also the adjustable joint 16. and they are therefore not described herein in detail.

lVhile one illustrative embodiment of the invention has .been described in detail, it is not my intention to l-imit its scope to that particular embodiment or otherwise than by the terms of the appended claims.

I claim:

1. A brake comprising, in combination, a drum, a backing plate at the open side of the drum, a friction device in the drum having adjacent separable ends and formed with slots in said ends, a shaft passing through the backing plate and having an applying device actin on said ends, supporting means adjacent t e backing plate and in which the shaft is journaled, and devices on opposite sides of the shaft and securing said means to the backing plate and which extend through the slots in the ends of the friction device and one of which serves as an anchor' for the friction device when the drum is turning in one direction and the other of `which serves as an anchor for the friction device when the drum is turning in the other direction.

2. A brake comprising, in combination, a drum, a backing plate at the open side of the drum, a fioating friction device in the drum having adjacent separable ends and formed with slots in said ends, a shaft passing through the backing plate and having an applying device acting on said ends, supporting means adjacent the backing plate and in which the shaft is journaled, and devices on opposite sides of the shaft and securing said means to the backing plate and which extend through the slots in the ends of the friction device and against one of which devices the friction device anchors when the drum is turning in one direction and against the other of which devices the friction device anchors vwhen the drum is turning in the other direction.

3. A brake comprising, in combination, a shoe formed with a slot, a post shouldered to form a portion of reduced diameter passing through said slot, a washer resting against the shoulder of said post and enga ing one side of the shoe, and another was er carried by the reduced-diameter portion of the post and held against movement lengthwise of the post and engaging the opposite side of the shoe.

4. A brake shoe having a stiifening web formed with a slot extending inwardly from its end, slotted reinforcing plates secured on opposite sides of said Web and having unslotted portions extending beyond the end of said web, and a thrust member extending between said portions of the reinforcing plates engaging the end of the web and abutting the reinforcing plates.

5. A brake shoe having a stiffening web, reinforcing plates secured on opposite sides of said web and extending beyond the end of said web, and a thrust member extending between said portions of the reinforcing plates and abutting the end of the web.

6. A brake shoe having a stifening web formed with a. slot extending inwardly from its end, slotted reinforcing plates secured on opposite sides of said web and having unslotted portions extending be ond the end of said web, and a thrust mem er extending between said portions of the reinforcing plates in line with said web, said thrust member engaging the web and abutting the extending portions of the reinforcing plates.

7. A brake shoe havin a stiffening web, reinforcing plates secure on opposite sides of said web and having portions extending beyond the endof said web, and a thrust member extendin between said portions of the reinforcing p ates in line with said web and projecting laterally across the ends of the reinforcing plates.

8. A brake comprising, in combination, va drum, a backing plate at the open side of the drum, a floating friction device in the drum having adjacent separable ends, a shaft passing through the backing plate and having an applying device acting on said ends, supporting means adjacent the backing platen and in which saidshaft is journaled, and a pair of anchorage devices securing the supporting means to the backing plate on opposite sides of the shaft and on one of which one of said ends anchors when the drum is turning in one direction and on the other of which the other of said ends anchors when the drum is turning in the other direction.

9. A brake, comprising, in combination, a drum, a backing plate at the open side of the drum, afloating friction device in the drum having adjacent separable ends, a shaft passing through the backing plate and having an applying device acting on said ends, sup

porting means adjacent the backing plate and in which said shaft is journaled and which holds the shaft against shifting, and anchorage means securing the supporting means to the backing plate and on which one of said ends anchors when the drum is turning in one direction and on which the other of said ends anchors when 4the drum is turning in the other direction.

10. A brake backing plate having reinforcing parts provided with a bearing for an operating shaft, in combination with a pair of anchor members extending through the backing late on opposite sides of the bearing and aving collars on the inner side of lthe plate and nuts threaded on their ends and co-operating with the collars to clamp said parts to the backing plate.

11. A brake comprising, in combina-tion, a drum a support, a plurality of fioating connected shoes withm the drum, applying means for said shoes including a shaft extending crosswise of said support, a bearin device in which said shaft is journaled, an

Y a pair of anchors securing the bearing device to said support and against one of which one of said shoes anchors when the drum is turning in one direction and against the other of which a different one of said shoes anchors when the drum is turning in the other direction.

12. A brake cornprisinv in combination, a drum,V a support, a plura ity of fioating connected shoes within the drum, applying means for said shoes including a shaft extending crosswise of said support, a bearing device in which said shaft is journaled, and anchorage means securing the bearing device to said support and against which one of said shoes anchors when the drum is turning in one direction and against which a different one of said shoes anchors when the drum is turnin in the other direction.

A 13. A bra-ke acking plate having a shaft bearingsecured thereto by a pair of spaced brake anchors.

14. A brake backing plate having a shaft bearing ixedly secured thereto by a brake anchorage means.

15. A brake backing plate having reinforcing plates arranged flat against its inner and outer faces and provided with a. shaft bearing, in combination with brake anchors so on opposite sides of said facing securing the reinforcing plates to the hacking plate.

brake backing plate having reinforcing plates arranged Hat against its inner outer faces and provided with a shaft bearing, in combination with brake anchormeans securing the reinforcing plates to the backing plate. y

1'?. A brake backing plate having mounted thereon a shaft bearing including a part @a resting fiat against the plate, in combination with brake anchors on opposite sides of said bearing and securing said part to the backing plate.

18. A brake backing plate having mounted thereon ashaft bearing including a part resting fiat against the plate, in combination with brake anchorage means iXedly securing said part to the backing plate.

19. A brake backing plate having a shaft fe hearing with laterally-extending portions festin against the plate7 in combination with ake anchors passing through said plate and said portions and having collars and nuts threaded. on their ends and cooperating with the collars to bolt the plate and the shaft bearing together.

ln testimony whereof, -,iave hereunto gned name.

LUDGER LA BRIE.