Turbocharger having an actuator-actuated adjusting device and a transmission element with one-part component body

Abstract

A turbocharger for a combustion engine has an adjusting device for matching its operating behavior to the operating behavior of the combustion engine, an actuating actuator, and a transmission element. The transmission element is coupled between the actuating actuator and the adjusting device. The transmission element has a one-part component body, which in each case extends from a first coupling point to a second coupling point along a longitudinal axis and, in each of its end regions, has a coupling element for coupling to the actuating actuator and to the adjusting device. The respective coupling element is designed as an integral part of the component body in the form of a ball receptacle of a ball joint connection in the component body.

Claims

1. A turbocharger for a combustion engine, the turbocharger comprising: an adjusting device for matching an operating behavior of the turbocharger to an operating behavior of the combustion engine; an actuating actuator for actuating said adjusting device; a transmission element for transmitting a manipulated variable of said actuating actuator to said adjusting device; said transmission element being coupled directly or indirectly to said actuating actuator at a first coupling point and to said adjusting device at a second coupling point; said transmission element having a one-part component body that extends from said first coupling point to said second coupling point along a longitudinal axis and said component body having a respective coupling element at each of an end region facing said first coupling point for coupling to said actuating actuator and at an end region facing said second coupling point for coupling to said adjusting device; wherein each of said coupling elements is an integral part of said component body, and forms a ball receptacle of a ball joint connection in said component body; wherein each of said coupling elements is provided with one separate spring element; and wherein said one separate spring element is received in an aperture of the respective ball receptacle and is configured to apply a preloaded spring force to a respective joint ball, in order to hold the respective joint ball in the respective ball receptacle without play and secure the respective joint ball in the respective ball receptacle of the respective ball joint connection of said transmission element.

2. The turbocharger according to claim 1, wherein said component body is a one-part shaped sheet metal part produced from a metal sheet or a sheet metal strip by a process selected from the group consisting of a punching and bending method, a punching and deep-drawing method, and a deep-drawing method.

3. The turbocharger according to claim 1, wherein said component body of said transmission element is formed with at least one bead and/or protrusion in a direction of the longitudinal axis of said component body in order to stabilize said component body.

4. The turbocharger according to claim 1, wherein each said ball receptacle is a cylindrical, pot-shaped depression with a pot bottom, a pot wall and a circular shoulder or opening in said pot bottom, forming a ball seat for the respective joint ball, and said pot wall is formed with the aperture receiving said one separate spring element to hold the joint ball in the respective said ball receptacle.

5. The turbocharger according to claim 1, wherein each said ball receptacle of the respective said coupling element is a circular opening in said component body, forming a ball seat for the joint ball, each having a securing tab on said component body, bent over in a direction of the joint ball, on both sides of said ball seat, and wherein the respective said securing tab is formed with at least one securing tab aperture for receiving said one separate spring element for securing the joint ball in the respective said ball receptacle.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) FIG. 1 shows an illustration of a turbocharger according to the invention having an adjusting device, an actuating actuator and a transmission element;

(2) FIG. 2 shows a three-dimensional illustration of a transmission element of an embodiment of the turbocharger as well as a partial section thereof;

(3) FIG. 3 shows a three-dimensional illustration of a further transmission element of an embodiment of the turbocharger in two views as well as a partial section thereof, and a spring element for securing the ball joint connection;

(4) FIG. 4 shows a further three-dimensional illustration of a further transmission element of an embodiment of the turbocharger in two views, as well as a partial section thereof;

(5) FIG. 5 shows a further three-dimensional illustration of a further transmission element of an embodiment of the turbocharger in two views, as well as a partial section thereof.

DETAILED DESCRIPTION OF THE INVENTION

(6) Parts which are identical in terms of function and designation are denoted by the same reference signs throughout the figures. When, in the course of describing the objects shown in the figures, the terms “top”, “above” or “upper side” and “bottom”, “below” or “lower side” are used, “top”, “above” and “upper side” refer to the region facing away from the joint ball 81 in the case of the transmission element 70 and the component body 73, respectively, and to the region facing the ball seat in the case of the joint ball 81. “Bottom”, “below” and “lower side” are used to denote the correspondingly opposite regions.

(7) FIG. 1 shows the basic construction of an embodiment of the turbocharger 1 according to the invention, with an exhaust-gas turbine 20, a fresh-air compressor designed as a radial compressor 30 and a rotor bearing unit 40 arranged therebetween.

(8) The turbine housing 21 has a manifold connector 24 for connection to the exhaust manifold of a combustion engine, and an exhaust connector 27 for connection to the exhaust pipe. Also visible on the exhaust-gas turbine 20 is an adjusting lever 51, with a second coupling point 52, an adjusting device 50 arranged inside the housing, here for example a wastegate valve.

(9) FIG. 1 furthermore shows the fresh-air compressor, which is embodied as a radial compressor 30. The compressor housing 31 has an intake manifold connector 34 for connection to the intake manifold of the combustion engine and an intake connector connection 37 for connection to the intake connector of the combustion engine, via which fresh air is drawn in from outside, for example via a filter unit.

(10) Arranged on the compressor housing 31 is an actuating actuator 60, for actuating the adjusting device 50, said actuator being designed in this embodiment as an electromechanical actuating drive with an output crank 61, having a first coupling point 62. A transmission element 70 is provided for transmitting the manipulated variable specified by the actuating actuator 60 to the adjusting device 50, said transmission element being coupled here via the first coupling point 62 of the output crank 61 to the actuating actuator 60 on the one hand and via the second coupling point 52 of the adjusting lever 51 to the adjusting device 50 on the other hand.

(11) The transmission element 70 has a one-part component body 73, which in each case extends from the first coupling point 62 to the second coupling point 52 along a longitudinal axis 75 and wherein, in each of its end regions facing the first coupling point 62 or the second coupling point 52, the component body 73 has a coupling element 71, 72 for coupling to the actuating actuator 60 and to the adjusting device 50, wherein the respective coupling element 71, 72 is designed as an integral part of the component body 73 in the form of a ball receptacle 82 of a ball joint connection 80 in the component body 73. As can already be seen from FIG. 1, in the embodiment of the turbocharger 1 shown, the transmission element 70 has a component body 73, at the opposite ends of which there is arranged in each case a coupling element 71, 72 designed as a ball receptacle 82 of a ball joint connection 80. Furthermore, the component body 73 illustrated has a protrusion 74 extending along the longitudinal axis 75, between the coupling points 52, 62, in the central region of the component body and providing the component body 73 with increased stability against buckling under shear load.

(12) In FIG. 2, in view A), the transmission element 70 already illustrated in FIG. 1 is then illustrated in isolation and on an enlarged scale, making the details easier to see. The transmission element 70 has a component body 73 that is produced, for example, by a punching and deep-drawing method. Provided at each of the two opposite ends of the component body is a coupling element 71, 72, which is designed as a ball receptacle 82 of a ball joint connection 80.

(13) The ball joint connection 80 consists of the joint ball 81 and the complementarily designed ball receptacle 82 or ball seat, which is formed here by a circular shoulder or opening 85 in the pot bottom 83.

(14) As will be seen from the partial sectional view of the ball receptacle 82 in view B) of FIG. 2, the respective ball receptacle 82 is designed as a cylindrical, pot-shaped depression with a pot bottom 83, a pot wall 84 and a circular shoulder or opening 85 in the pot bottom 83, as a seat for the joint ball 81 (indicated with a dashed line in this view). In this case, the pot wall 84 has at least one pot wall aperture 84a for receiving a separate spring element 76 for securing the joint ball 81. It can be seen that the spring element 76 is here designed, for example, as a bent spring wire clip which, after insertion into the pot wall aperture 84a, fits around the joint ball 81 below the largest circumference of the joint ball 81 and rests against the latter under spring preload. In this way, the joint ball 81 is held without play against the ball seat in the pot bottom 83 by means of the spring element. The spring element 76, which rests against the joint ball 81 under spring force, generates a counterforce to the rotational or pivoting movements of the joint ball 81 in its ball seat through friction and thus advantageously additionally acts as a vibration-damping component.

(15) FIG. 3 illustrates a transmission element 70 of a further embodiment of the turbocharger 1 according to the invention, which is an alternative to the embodiment in FIG. 2. The embodiment of the transmission element 70 shown in FIG. 3 is produced, for example, by a punching and bending method and is characterized in that the ball receptacle 82 of the respective coupling element 71, 72 is designed in each case as a circular opening 85 at the respective end of the component body (73), which forms the ball receptacle 82 or ball seat for the joint ball 81. On both sides of the ball receptacle 82, a respective securing tab 86 bent over in the direction of the joint ball 81 is formed on the component body 73, wherein the respective securing tab 86 has at least one securing tab aperture 86a for receiving a separate spring element 76 for securing the joint ball 81.

(16) In view A) of FIG. 3, the transmission element 70 is illustrated without the spring elements 76 inserted, and the securing tab apertures 86a can be seen.

(17) View B of FIG. 3 shows the same transmission element 70 with inserted spring elements 76.

(18) View C) of FIG. 3 shows a corresponding spring element in enlarged view. Here, the spring element is embodied as a leaf spring element in fork form.

(19) Finally, view D) of FIG. 3 shows a partial section of a coupling element 71, 72 of this embodiment, analogous to view B) of FIG. 2, from which the arrangement of the joint ball 81 (indicated here by dashed lines) and the securing of the ball 81 in the ball receptacle 82 or ball seat can be seen. Here too, the securing tab aperture is arranged in the securing tabs 86 in such a way that, when installed, the fork-shaped separate spring element 76 fits around the joint ball 81 below the largest circumference of the joint ball 81 and rests against it under spring preload. In this way, the joint ball 81 is once again held without play against the ball seat in the component body 73 by means of the spring element 76. The spring element 76, which rests against the joint ball 81 under spring force, generates a counterforce to the rotational or pivoting movements of the joint ball 81 in its ball seat through friction and thus advantageously additionally acts as a vibration-damping component.

(20) FIG. 4 shows a further transmission element 70 of a further embodiment of the turbocharger 1 according to the invention, which is an alternative to the embodiments shown previously in FIGS. 2 and 3. The transmission element 70 has a component body 73 that is produced, for example, by a punching and bending method. Provided at each of the two opposite ends of the component body is a coupling element 71, 72, which is designed as a ball receptacle 82 of a ball joint connection 80. This embodiment is characterized in particular by the fact that the respective ball receptacle 82 is formed by two ball seat tabs 87, which are cut out of the component body 73, lie opposite one another and are bent up out of the plane of the component body 73 in the opposite direction to the joint ball 81 and serve as a ball receptacle 82 or ball seat for the joint ball 81. On both sides of the ball receptacle 82, a respective securing tab 86, bent over in the direction of the joint ball 81, is formed on the component body 73, wherein the respective securing tab 86 is bent over in the direction of the joint ball to such an extent that it rests resiliently against the joint ball 81 and thus acts as an integrated spring element 77 for securing the respective joint ball 81 in the ball receptacle 82.

(21) To assemble the respective ball joint connection 80, the two securing tabs 86 are bent open to such an extent in the elastic range that the joint ball can be inserted into the ball seat. After insertion of the joint ball 81, the securing tabs 86 rest under preload against the joint ball in a region below the largest ball circumference and in this way hold it in the ball seat. In this embodiment too, the securing tabs 86 resting against the joint ball 81 under spring force generate a counterforce to the rotational or pivoting movements of the joint ball 81 in its ball seat through friction and thus advantageously additionally act as vibration-damping components.

(22) In view A) of FIG. 4, the transmission element 70 is shown from the upper side, with the result that the ball seat tabs 87 cut out of the component body 73, lying opposite one another and bent up out of the plane of the component body 73 in the opposite direction to the joint ball 81, are clearly visible.

(23) View B) of FIG. 4 shows the same transmission element 70 from the lower side thereof, and therefore the securing tabs 86 on the component body, which are each bent over in the direction of the joint ball 81 on both sides of the ball seat, are readily visible.

(24) Finally, view C) of FIG. 4 shows a partial section of a coupling element 71, 72 of this embodiment, analogous to view B) of FIG. 2 and view D) of FIG. 3, from which once again the arrangement of the joint ball 81 (indicated here by dashed lines) and the securing of the joint ball 81 in the ball receptacle 82 or ball seat by means of the securing tabs 86 can be seen. Here, the securing tabs are bent over in the direction of the joint ball 81 to such an extent that they rest resiliently, below the maximum diameter of the joint ball 81, against the joint ball 81, and thus act as an integrated spring element 77 for securing the respective joint ball 81 in the ball receptacle 82.

(25) Finally, FIG. 5 shows a further transmission element 70 of a further embodiment of the turbocharger 1 according to the invention, which is an alternative to the embodiments shown previously in FIGS. 2, 3 and 4. The transmission element 70 shown here likewise has a component body 73 that is produced, for example, by a punching and deep-drawing method. Provided at each of the two opposite ends of the component body 73 is a coupling element 71, 72, which is designed as a ball receptacle 82 of a ball joint connection 80.

(26) This embodiment is characterized, in particular, in that the ball receptacle 82 is formed by a spherical cap 88 formed upwardly, i.e. in the opposite direction to the joint ball 81, in the component body, for example by a deep-drawing method, as a ball receptacle 82 or ball seat for the joint ball 81. Here too, on both sides of the ball receptacle 82, securing tabs 86 bent over in the direction of the joint ball 81 are formed on the component body 73, wherein the respective securing tab 86 is bent over in the direction of the joint ball 81 to such an extent that it rests resiliently against the joint ball 81 and thus acts as an integrated spring element 77 for securing the respective joint ball 81 in the ball receptacle 82.

(27) Here too, to assemble the respective ball joint connection 80, the two securing tabs 86 must be bent open to such an extent in the elastic range that the joint ball can be inserted into the ball seat. After insertion of the joint ball 81, the securing tabs 86 rest under preload against the joint ball in a region below the largest ball circumference and in this way hold it in the ball seat. In this embodiment too, the securing tabs 86 resting against the joint ball 81 under spring force generate a counterforce to the rotational or pivoting movements of the joint ball 81 in its ball seat through friction and thus advantageously additionally act as vibration-damping components.

(28) In view A) of FIG. 5, the transmission element 70 is shown from the upper side, with the result that the spherical caps 88 formed in the component body 73 and formed out of the plane of the component body 73 in the opposite direction to the joint ball 81, i.e. upwardly, are clearly visible.

(29) View B) of FIG. 5 shows the same transmission element 70 from the lower side thereof, with the result that the ball receptacle 82 or the respective ball seat as well as the securing tabs 86, which are each bent over in the direction of the joint ball 81, are formed on the component body 73 and act as integrated spring elements 77 for securing the joint ball 81 in the ball seat, are clearly visible.

(30) Finally, view C) of FIG. 4 shows a partial section of a coupling element 71, 72 of this embodiment, analogous to views B), D) and C) of FIGS. 2, 3 and 4, from which once again the arrangement of the joint ball 81 (indicated here by dashed lines) and the securing of the joint ball 81 in the ball receptacle 82 or ball seat by means of the securing tabs 86 can be seen. Here, the securing tabs are bent over in the direction of the joint ball 81 to such an extent that they rest resiliently, below the maximum diameter of the joint ball 81, against the joint ball 81, and thus act as an integrated spring element 77 for securing the respective joint ball 81 in the ball receptacle 82.