A BLOCK HOLDER FOR A BOGIE BRAKE

Abstract: A rail vehicle bogie brake has a brake beam (4, 5), which at its end is provided with a brake block holder (8) having a brake block (9) for brake application against a tread of a wheel. The brake block holder has a transverse cylinder (19) for its pivotable connection with the brake beam. A mounting shaft (14) is attached in the end of the brake beam and is provided with a sleeve (16). The sleeve engages the mounting shaft and has an outer diameter corresponding to the inner diameter of the cylinder. A sleeve plate (17) is held against the sleeve, which is slightly longer than the cylinder, by means of screws (18) attached in the mounting shaft and prestressing the sleeve.

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CD 0) CO CD H- ≤ Hi TJ 0J n CD <. CD Hi 3 Hh 0J α 0J H- CD 0 ) tr H- ti H- 3 0 ω (D rt 0J O 0 r 3 P t3 H ti H- 0 tr rt H- Hi 0 ≤ t C H{ CD -s iQ O H- 1 O OJ tr N TJ TJ TJ fD tl Hh Hi H- o o H- CD H- ft H- tr tr rt o rt o H- rt o rt W rt Hi rt 13 tr rt fD H 1 tr Hj tr l- rt ^ ? tr CD tr OJ tr O CD ft CO H{ 0 CD fD rt rt rt tr fD o ØJ 0J OJ tr 3 H- H- 1 t ) mounting shaft and having an outer diameter corresponding to the inner diameter of the cylinder and in that means are provided for holding the sleeve to the mounting shaft and for forming a transverse stop for the brake block holder. Said means are preferably a sleeve plate held against the sleeve, which is slightly longer than the cylinder, by means of screws attached in the mounting shaft and prestressing the sleeve. The sleeve, which is a wear part in the design, is not only prestressed for a favourable force transmission but is also easy to remove by removing the screws and the sleeve plate. An improved and controlled application of bending moments from the sleeve to the mounting shaft is obtained by the provision of an internal force-transmitting ring in the sleeve in engagement with the mounting shaft. A favourable mounting and force transmission is attained in that the mounting shaft is provided with an abutment for a brake beam end plate, against which the sleeve in its turn is applied. Brief Description of the Drawings The invention will be decribed in further detail below under reference to the accompanying drawings, in which Fig 1 is a top view of relevant parts of a rail vehicle bogie with a bogie brake incorporating brake block holders according to the invention, Fig 2 is a side view, partly sectioned, of a bogie brake with block holders as shown in Fig 1, Fig 3 is a sectional view - substantially along the line III-III in Fig 2 - through a brake block holder according to the invention, and Fig 4 is a sectional view - substantially along the line IV- IV in Fig 2 - through an upper suspension of a brake block hanger for a brake block holder according to the invention. Detailed Description of a Preferred Embodiment Fig 1 is a top view primarily of a bogie brake, and the bogie in which it is mounted is only suggested by means of a bolster 3. However, it is well known to the person skilled in the art that in a bogie for a rail vehicle, wheel sets 1 with wheels 2 are journalled in side frames (not shown) , which are connected by springs (not shown) to a transverse bolster 3. At its center this bolster 3 is rotatably journalled to a rail vehicle underframe (not shown) . In a way to be described two brake beams 4 and 5 are suspended from the bolster 3. The brake beam 4 to the right in Fig 1 is provided with two brake units 6, whose brake force applying push rods are connected to push bars 7, in turn connected to the other brake beam 5. Each brake beam 4 and 5 is at each end provided with a brake block holder 8 having a replacable brake block 9 for cooperation with the respective tread of the wheels 2. At the admission of pressurized brake fluid (compressed air) to the brake units 6 a brake force will be applied to the wheels 2 via the brake block holders 8 and the brake blocks 9. The bolster 3 is shown in section in Fig 2. Towards its end it is provided with suspension brackets 10 for pivotal attachment of suspension links 11, at their opposite ends pivotally connected to the brake block holders 8 in a way to be further described. Also visible in Fig 2 are wheels 2, brake beams 4 and 5, a brake unit 6 (mostly hidden) , a push bar 7, brake block holders 8 and brake blocks 9. A brake block holder 8 and its connection to the end of a brake beam 4 is illustrated in Fig 3, to which reference is now primarily made. The brake beam is in this o tr Oi Oi H oi TJ Ω Ω £ ft i H H rt H- 01 TJ rt > fD rt H CD 01 TJ H- 1 ti Ω Ω 0 H- H- σ. Hi ; O H- tr fD C tr tl tr tr tl tr ιl tl tr Hi 0 CD 0J Hi H- J 0 ) 01 H- ^ H- fD tl rt CD 01 \ \ ØJ 0 ) fD 01 Oi CD \ a 01 CD 13 3 HJ 01 H- Oi 3 3 01 10 01 H- 01 tr Ω . H Hh ft . 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Claims: CLAIMS 1. A brake beam for a bogie brake, the brake beam (4, 5) being provided at its end with a brake block holder (8) , which may be fitted with a brake block (9) for brake application against a tread of a wheel (2) , wherein the brake block holder has a transverse cylinder (19) for its pivotable connection with the brake beam, c h a r a c t e r i z e d in that a mounting shaft (14) is attached in the end of the brake beam (4, 5) and is provided with a sleeve (16) engaging the mounting shaft and having an outer diameter corresponding to the inner diameter of the cylinder (19) and in that means (17, 18) are provided for holding the sleeve to the mounting shaft and for forming a transverse stop for the brake block holder (8) . 2. A brake beam according to claim 1, c h a r a ct e r i z e d in that a sleeve plate (17) is held against the sleeve (16) , which is slightly longer than the cylinder (19) , by means of screws (18) attached in the mounting shaft (14) and prestressing the sleeve (16) . 3. A brake beam according to claim 1, c h a r a ct e r i z e d in that the sleeve (16) is provided with an internal force-transmitting ring (16') in engagement with the mounting shaft (14) . 4. A brake beam according to claim 1, c h a r a ct e r i z e d in that the sleeve (16) engages a brake beam end plate (15) , which in turn engages an abutment (14') of the mounting shaft (14) . 5. A brake beam according to claim 4, c h a r a ct e r i z e d in that resilient rings (21) are arranged around the ends of the cylinder (19) between on one hand either external sides of brake holder side plates (20) and on the other hand the sleeve plate (17) and the beam end plate (15) , respectively. 6. A brake beam according to claim 4, c h a r a ct e r i z e d in that the mounting shaft (14) is fastened to a transverse plate (13) in the brake beam (4, 5) and extends through the brake beam end plate (15) . 7. A brake beam according to claims 4 and 6, c h a ra c t e r i z e d in that a friction device (22-24) is arranged in coaxial holes in the brake holder side plates (20) and is in spring-biassed friction engagement with the beam end plate (15) and the sleeve plate (17) .

Inventors: EMILSSON FRED, NYMAN JOHAN, EMILSSON, FRED, NYMAN, JOHAN
Applicants: EMILSSON FRED, NYMAN JOHAN, SAB WABCO AB, EMILSSON, FRED, NYMAN, JOHAN
Application year: 2000
Main classification: B61H1
IPC codes: B60T1, B61H1, B61H13