Electric adjusting device for a disc brake

1. An electric adjusting device ( 1 ) for a disc brake ( 2 ) having a brake disc and a brake caliper ( 2 a ) of a vehicle for adjusting the wear of brake linings ( 3 , 3 a ), the electric adjusting device ( 1 ) comprising:

an electric motor ( 4 ),

a force transmission device ( 5 ),

a sensor unit ( 7 ), and

an actuating unit ( 6 ),

wherein the electric motor ( 4 ) is oriented in one of the following arrangements:

axially parallel to the actuating unit ( 6 ) toward the brake disc, axially parallel to the actuating unit ( 6 ) and the sensor unit ( 7 ) toward the brake disc, or

coaxial with the actuating unit and the sensor unit, and the electric motor ( 4 ) and the actuating unit ( 6 ) are arranged on a carrier plate ( 8 ).

2. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 1 , wherein a carrier plate ( 8 ) comprises:

a. a first pocket ( 20 ) to hold the first bevel wheel ( 15 ),

b. a bead ( 22 ) with at least two opposite protrusions ( 23 , 23 a ; 23 b , 23 c ) to hold a transmission shaft ( 13 ), and

c. a second pocket ( 21 ) to hold a worm gear ( 10 ).

3. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 2 , wherein the at least two opposite protrusions ( 23 , 23 a ; 23 b , 23 c ) are configured to secure the transmission shaft ( 13 ) in the bead ( 22 ) of the carrier plate ( 8 ).

4. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 1 , wherein the electric adjusting device ( 1 ) comprises a plug connection ( 9 ) for the power supply of the electric motor ( 4 ) and the sensor unit ( 7 ), and for transmission of a signal of the sensor unit ( 7 ).

5. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed claim 1 , wherein the electric motor ( 4 ) is secured to the carrier plate ( 8 ) by force locking or form fitting due to a connection comprising a screw connection ( 34 , 34 a ), a plug connection ( 43 , 48 ; 43 a , 48 a ; 43 b , 48 b ) or a bayonet connection ( 46 , 47 ; 46 a ).

6. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 1 , wherein the carrier plate ( 8 ) is arranged axially on the outside ( 17 ) of the brake caliper ( 2 a ).

7. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 1 , wherein the carrier plate ( 8 ) comprises an encircling seal ( 19 ) for sealing off the electric adjusting device ( 1 ) against surrounding factors and the encircling seal ( 19 ) is arranged axially between the brake caliper ( 2 a ) and the adjusting device ( 1 ).

8. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 1 , wherein a worm gear ( 10 ), a transmission shaft ( 13 ) and a bevel gear ( 14 ) are arranged at least partly in the carrier plate ( 8 ) and the brake caliper ( 2 a ), after installing the electric adjusting device ( 1 ) in the disc brake ( 2 ), is a cover of the electric adjusting device ( 1 ).

9. An electric adjusting device ( 1 ) for a disc brake ( 2 ) having brake disc and a brake caliper ( 2 a ) of a vehicle for adjusting the wear of brake linings ( 3 , 3 a ), the electric adjusting device ( 1 ) comprising:

an electric motor ( 4 ),

a force transmission device ( 5 ),

a sensor unit ( 7 ), and

an actuating unit ( 6 ),

wherein the electric motor ( 4 ) is oriented in one of the following arrangements:

axially parallel to the actuating unit ( 6 ) toward the brake disc,

axially parallel to the actuating unit ( 6 ) and the sensor unit ( 7 ) toward the brake disc, or

coaxial with the actuating unit and the sensor unit, and

the electric motor ( 4 ) and the actuating unit ( 6 ) are arranged on a carrier plate ( 8 );

wherein the force transmission device ( 5 ) of the electric adjusting device ( 1 ) comprises the following features:

a worm gear ( 10 ) with a transmission shaft ( 13 ), wherein the transmission shaft ( 13 ) comprises a worm shaft ( 11 ) provided with one or more screw turns ( 11 a ) and a worm wheel ( 12 ) meshing with the worm shaft ( 11 ) and flanged to the actuating unit ( 6 ), and

a bevel gear ( 14 ), comprising a first bevel wheel ( 15 ) flanged to the transmission shaft ( 13 ) and a second bevel wheel ( 16 ) flanged to the electric motor ( 4 ).

10. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 9 , wherein the worm shaft ( 11 ) and the worm wheel ( 12 ) are configured to produce a form fit in both directions of turning (D) and to prevent by the form fit a spontaneous turning of the actuating unit ( 6 ) caused by vibrations or other surrounding factors.

11. The electric adjusting device ( 1 ) for a disc brake ( 2 ) as claimed in claim 9 , wherein the transmission shaft ( 13 ) is locked by form fitting with the electric motor ( 4 ) and the sensor unit ( 7 ), the transmission shaft ( 13 ) being connected by the bevel gear ( 14 ) to the electric motor ( 4 ) and by the worm wheel ( 12 ) to the sensor unit ( 7 ).

12. An electric adjusting device ( 1 ) for a disc brake ( 2 ) having brake disc and a brake caliper ( 2 a ) of a vehicle for adjusting the wear of brake linings ( 3 , 3 a ), the electric adjusting device ( 1 ) comprising:

an electric motor ( 4 ),

a force transmission device ( 5 ),

a sensor unit ( 7 ), and

an actuating unit ( 6 ),

wherein the electric motor ( 4 ) is oriented in one of the following arrangements:

axially parallel to the actuating unit ( 6 ) toward the brake disc,

axially parallel to the actuating unit ( 6 ) and the sensor unit ( 7 ) toward the brake disc, or

coaxial with the actuating unit and the sensor unit, and

the electric motor ( 4 ) and the actuating unit ( 6 ) are arranged on a carrier plate ( 8 );

wherein the sensor unit ( 7 ) of the electric adjusting device ( 1 ) detects an absolute position (P) of the actuating unit ( 6 ), wherein the absolute position (P) serves as a manipulated variable for regulating the electric motor ( 4 ), and the absolute position (P) is determined from a detected position of the actuating unit ( 6 ) by an evaluation logic.