Balance, particularly a wheel loading balance

A balance, particularly a wheel loading balance, comprising a platform (1), a first lever member (4) supporting one side (13) of said platform, a second lever member (5) supporting the opposite side (14) of said platform, a base (6) having a rim, said first and second lever members (4, 5) having remote ends and facing ends and being mounted in said base (6) to rotate about their remote ends (36, 37), and a pressure force measuring cell (8) located in said base (6) which is loaded by the facing ends of said lever members (4, 5),

• said rim of said base (6) having at each side at least one step-shaped recess, each recess having a vertical recess wall (58) and a recess bottom, an elastically compressible pad (56) mounted on said recess bottom,
• said platform (1) being horizontally movably mounted on said lever members (4, 5) and having opposite side rims, at least one projection (59) at the underside of each said opposite side rims, said projection (59) having a vertical face which faces said vertical recess wall (58),
• a rolling body (55) inserted in each of said step-shaped recesses serving as abutment for the limitation of the horizontal mobility of said platform (1), each said rolling body (55) having a diameter which is greater than the width of the recess and being freely disposed on said elastically compressible pad (56) between said vertical face of said projection (59) and said vertical recess wall (58),
• whereby the platform (1) which has abutted a rolling body (55) can without sliding friction move downwardly just by overcoming the rolling friction of the rolling body (55) and the spring effect of the elastically compressible pad (56).

A balance, particularly a wheel loading balance, comprising a platform (1), a first lever member (4) supporting one side (13) of said platform, a second lever member (5) supporting the opposite side (14) of said platform, said first and second lever members (4, 5) having remote ends (36, 37) and facing ends, a base (6) in which the lever members (4, 5) are mounted to rotate about their remote ends (36, 37), and a pressure force measuring cell (8) which is loaded by the facing ends of said lever members (4, 5) located in said base (6), said first and second lever members (4, 5) having recesses (46, 47, 48, 49), first bearing means (50) arranged in said recesses, said platform (1) having projections (2, 3) which are provided with second bearing means (51) which are supported on said first bearing means (50) to enable a horizontal displacement of said platform (1) on the lever members (4, 5),

• said base (6) having steps provided with third bearing means (40, 41), the remote ends (36, 37) of the lever members (4, 5) having first fulcrum means (38, 39) supported on said third bearing means (40, 41),
• said pressure force measuring cell (8) having a diaphragm (23), a pressure transmitting member (7) resting on said diaphragm (23), a fourth bearing means (32) on said pressure transmitting member (7), said second lever member (5) having second fulcrum means (31) being rotatably supported on said fourth bearing means (32) of the pressure transmitting member (7),
• the depth of the recesses (46-49), the height of the steps of the base (6), and the thickness of the pressure transmitting member (7) being so matched to one another that the bearing surfaces of said first, second, third and fourth bearing means and said first and second fulcrum means (50, 51, 40, 41, 32, 38, 39, 31) by which said platform (1) is braced on said lever members (4, 5) and these latter are supported on the steps of said base (6) and said pressure transmitting member (7) lie at least approximately in one plane when the balance is not under load.