Device and procedure for aligning of components

Receiver unit (11;

• 11′;
• 22, 27;
• 27′) intended to co-operate with a transmitter unit (7) for alignment of a first component (1) and a second component (2) in a predetermined relation to each other, said components (1,2) consisting of power transmitting devices of the type chain propulsion or belt propulsion, which receiver unit (11;
• 11′;
• 22;
• 27;
• 27′) is arranged for mounting on the peripheral edge of one of the components (1) and arranged for detection of a light pattern (10) emitted by said transmitter unit (7), and that it comprises a detection device (18a, 18b;
• 18a′, 18b′;
• 23a, 23b;
• 28a, 28b;
• 28′a, 28′b) which in turn comprises a first detector (18a;
• 18a′;
• 23a;
• 28a;
• 28′a) and a second detector (18b;
• 18b′;
• 23b;
• 28b;
• 28′b), respectively, which are separated depthwise in relation to said transmitter unit (7), characterized in, that:
• the first detector (18a;
• 18a′;
• 23a;
• 28a;
• 28a′) comprises a first target and a second target and that the second detector (18b;
• 18b′;
• 23b;
• 28b;
• 28b′)comprises a third target, that
• the first target and the second target surround the third target, that
• the first target and the second target are arranged along essentially the same plane, that
• said targets comprise markings (19, 20, 21;
• 24, 25. 26;
• 29, 30, 31) upon which said light radiation is intended to incide, and that
• said targets extend along essentially the same planes, which are generally perpendicular in relation to the direction of incidence of said light radiation.

Method for alignment of a first component (1) and a second component (2) in a predetermined relation to each other, said components (1. 2) consisting of power transmitting devices of the type chain propulsion or belt propulsion, comprising:

• mounting a transmitter unit (7) on the peripheral edge of said first component (1),
• mounting a receiver unit (11;
• 11′;
• 22, 27;
• 27′) on the peripheral edge of said second component (2),
• generating a light pattern (10) from the transmitter unit (7) in the direction towards the receiver unit (11;
• 11′;
• 22;
• 27;
• 27′),
• detecting said light pattern (10) by means of the receiver unit (11;
• 11′;
• 22;
• 27;
• 27′) and
• detecting said light pattern by means of a first detector (18a;
• 18a′;
• 23a;
• 28a;
• 28′a) and a second detector (18b;
• 18b′;
• 23b;
• 28b;
• 28′b), respectively, which are arranged on said receiver unit (11;
• 11′;
• 22;
• 27;
• 27′) in a manner so that they are separated depthwise in relation to said transmitter unit (7), characterized in, that said method comprises:
• detecting said light pattern with a first target and a second target of the first detector (18a;
• 18a′;
• 23a;
• 28a;
• 28a′) and a third target of the second detector (18b;
• 18b′;
• 23b;
• 28b;
• 28b′), wherein the first target and the second target surround the third target, and the first target and the second target are arranged along essentially the same plane, and
• detecting said light pattern by means of reception of said light radiation on markings (19, 20, 21;
• 24, 25, 26;
• 29, 30, 31) of said targets, wherein said targets extend along essentially the same planes, which are generally perpendicular in relation to the direction of incidence of said light radiation.