JP2022046435A - Electronically rectified machine, electronically slip-controllable braking device with electronically rectified machine, and manufacturing method of electronically rectified machine - Google Patents

Abstract

To provide an electronically rectified machine, particularly an electronically rectified motor having a rotor attached to a rotor shaft that can be operated by rotary motion.SOLUTION: A signal transmitter 24 is provided to detect the rotation angle of a rotor shaft 16, and the signal transmitter has a holding member 28 and a magnet element 26 arranged on the holding member 28. A clamp 40 for fixing the holding member to the rotor shaft acts on a magnet element in the assembled state, and at least one fixing means 50 is formed that prevents the translational movement and the rotational movement of the magnet element relative to the holding member, thereby omitting the known adhesive connection between the magnet element and the holding member.SELECTED DRAWING: Figure 2

Description

The present invention is an electronically slip-controllable braking device comprising an electronically rectified machine according to the feature of the superordinate concept part of claim 1 and an electronically rectified machine according to the feature of the superordinate concept part of claim 10. , And a method for manufacturing an electronically rectified machine according to the features of claim 11 or claim 12.

The electronically rectified machine is incorporated as a drive device, for example, in an electronically slip-controllable brake device of an automobile to drive the pressure generator within the framework of brake pressure control. In this case, the electrical control of the machine is performed as needed by the electronic control unit of the braking device. For electrical control, the pressure generator supplies the pressure medium into the brake circuit. The brake pressure is then increased in the connected wheel brakes in proportion to the volume of the supplied pressure medium. With additional valve devices controllable by electronic control units, this braking pressure can be individually adapted to the latest slip ratios that occur in the wheels of the vehicle, each correspondingly disposed. This can prevent the wheels from being locked during the braking operation and thus improve the running stability of the vehicle. Moreover, the brake operation can be performed depending on the momentary road or driving conditions regardless of the driver.

The volume of the pressure medium pushed into the brake circuit by the pressure generator is an important control value in this control process. This control value can be calculated from the operation parameters of the drive device. The provided sensor device for this purpose detects the rotation angle and / or rotation speed of the rotor of the drive device and further transmits the measured signal to the electronic control unit for computational evaluation.

A known sensor device is composed of a signal transmitter that rotates with a rotor shaft and a signal receiver that is arranged in a stationary manner. The signal transmitter has at least one magnet element, which is non-rotatably fixed to the rotor shaft of the drive device using a holding member.

The electronically rectified machine according to the feature of the superordinate concept portion of claim 1 belongs to the prior art and is disclosed in, for example, Patent Document 1. A known machine is the drive device for the pressure generator of an electronically slip-controllable vehicle brake device, shown in the side view of FIG. 1 of this document.

The known drive device (10) includes an electronically rectified electric motor (12) equipped with a rotor (14) that can be driven by rotary motion, and a rotation coupled to the rotor (14) so as to be relatively non-rotatable. It has a child shaft (16). The rotor (14) is configured as before, and has an iron core and a plurality of permanent magnets arranged adjacent to each other in the circumferential direction of the iron core.

In known methods and formats, the magnetic field of this permanent magnet interacts with the magnetic field of the electric coil of the stator. For this purpose, the stator has a housing (18), which has an electric coil on the inner surface facing its permanent magnet. Based on the interaction between the magnetic fields, the rotor (14) and the rotor shaft (16) perform a common rotational motion.

The rotor shaft (16) is rotatably supported in the housing (18) of the drive unit (10), typically using rolling bearings (20). According to FIG. 1, for example, a plurality of devices on the rotor shaft (16) are arranged at right angles to the vertical line L of the rotor shaft (16) to operate a device (for example, a piston pump) (not shown). An eccentric member (22) is arranged.

Detail II of FIG. 1 shows a signal transmitter (24) of a sensor device for electronically detecting and evaluating the rotation angle and / or rotation speed of the rotor (14) or the rotor shaft (16). The signal transmitter (24) is arranged at the end of the rotor shaft (16) opposite to the rotor (14). The signal transmitter has a magnet element (26), which is indirectly fixed to the rotor shaft (16) via a holding member (28). The holding element (28) is configured in a cup shape and has a protruding mandrel (30), with the mandrel in the correspondingly arranged centering hole (32) of the rotor shaft (16). It is pushed into and glued into this centering hole (the glued connection is not shown). On the opposite side of the holding member (28), a blind hole-shaped receiving portion (34) that opens outward is formed, and a magnet element (26) is provided in the receiving portion (34). It is inserted so that the outside is flush with each other. The fixing of the magnet element (26) in the receiving portion (34) of the holding member (28) is also performed by an adhesive connection (not shown).

Under the operating conditions of this drive, the rotor (14) is often strongly accelerated or decelerated. In this case, the adhesive connection is exposed to a high dynamic load and is therefore reasonably prone to failure. The fixation of the magnet element in the holding member is exposed to a predetermined elasticity based on the adhesive connection, whereby the measurement error at the time of detecting the sensor position or rotation angle is relatively large. Even if these things are ignored, adhesive connections require high costs during mass production, for example for centralized adjustments for adhesive metering and curing. The holding members and centering holes required for the rotor shaft contribute to higher costs.

German Patent Application Publication No. 102017218648

On the other hand, in the electronically rectified machine according to the feature of claim 1, the magnet element is fixed on the rotor shaft not by the material coupling type but by the friction fastening type or the shape fastening type. Therefore, it has the advantage that it is carried out more robustly than in the prior art. The result is more accurate detection of the rotation angle signal or rotor speed, which ultimately results in an improvement in the electrical controllability of the machine, and thus with the actual pressure medium volume supplied. A reduction in the sometimes existing error between the desired target value or between the adjusted braking pressure and the target braking pressure is obtained. In addition, the machine manufacturing process is shortened. This is because there is no need to wait for the necessary preparation of the adhesive site or the time for the adhesive to cure. The metering device for the adhesive, or the UV irradiation device, which may be necessary for curing the adhesive, is omitted. Moreover, the friction fastening type / shape fastening type fixing work can be easily monitored in terms of process engineering.

It has been proposed to use a clamp to secure the holding member for the magnet element to the rotor shaft, which also comprises fixing means for the magnet element.

A further improved tolerance ring to this effect, for example made of spring steel, is suitable as a possible clamp, which is between the inner contour of the retaining member and the outer contour of the rotor shaft. It is in the gap. Such tolerance rings allow the use of inexpensive rotor shafts that consistently have a constant shaft diameter. Due to the provision of the clamp, the radial dimensions of the retaining member are increased, so the retaining member provides greater mounting space for the magnet element. A correspondingly larger magnet element protruding beyond the cross section of the rotor axis provides a stronger uniform magnetic field that can be more easily detected and evaluated by the signal receiver. Thereby, the detection of the advanced rotation angle or the rotation speed of the rotor shaft can be performed with higher accuracy, or a cheaper signal receiver and a magnet element having a rougher tolerance can be used. can. Also, magnet elements with more general tolerances simplify the interchangeability of components such as control units and electromechanical machines.

Other advantages and suitable developments of the invention are derived from the dependent claims and / or the following description.

According to the present invention, the clamp body has fixing means. The provided first fixing means engages one end face of the magnet element and abuts the magnet element under axial preload, here on the bottom of a simply constructed cup-shaped holding member. The second fixing means, on the other hand, abuts on the magnet element, for example, the flat portion of the magnet element, or engages in a notch that opens toward the end face of the magnet element to make the magnet element relative to each other. It is fixed to the holding member so that it cannot rotate. The fixing means is inexpensively configured in one member, preferably configured only on the side of the clamp facing the magnet element, and is distributed and arranged along the peripheral surface of the clamp. .. The fixing means extends in the longitudinal or radial direction of the clamp and can be easily formed, for example, by appropriately deforming the tongue piece formed on the clamp. The number, shape and arrangement or positioning of the fixing means in the clamp can be selected as required. The clamp has the shape of a sleeve, at least in the attached state. The sleeve may have a slit formed on the peripheral surface side, whereby it can be easily and inexpensively manufactured, for example, by punching and punching a thin metal strip.

FIG. 6 is a vertical cross-sectional view of the main components of an electronically rectified machine known by prior art, described at the beginning of the specification. FIG. 1 is a three-dimensional view of detail II of the embodiment according to the present invention shown in FIG. It is a top view of the solution by this invention with the holding member removed.

The embodiments of the present invention shown in the drawings will be described in detail in the following description.

The drawings include a total of two figures, in which the corresponding components are consistently labeled with the same reference numerals.

FIG. 2 shows the end of an electronically rectified machine rotor shaft (16) equipped with a signal transmitter (24). This end faces a second end (not shown) to which the rotor of the electromechanical machine is attached (see FIG. 1). The rotor axis (16) has a consistently constant outer diameter and is cut perpendicular to the vertical axis line L, that is, an axial end face aligned perpendicular to the vertical axis line L. Have. The transition portion from the shaft end surface to the shaft peripheral surface is configured as an annular chamfered portion, but may be selectively rounded.

A clamp (40) in the form of a tolerance ring is attached to the illustrated end of the rotor shaft (16). The clamp is configured as a cylindrical sleeve, which may be closed on the peripheral side or have slits formed on the peripheral side. Slit sleeves can be manufactured at a lower cost by bending metal sheet strips. When viewed in the direction of the vertical axis line L of the rotor shaft (16), the tightening body (40) is composed of the first tightening body division (40a) on the rotor side, and the first tightening body (40a) is formed. The body compartment (40a) is in contact with the outer peripheral portion of the rotor shaft (16) in a coplanar manner under an adjustable radial preload. The first tightening body division (40a) has shifted to the central division (40b), and in this central division (40b), a molding portion (42) protruding radially outward from the tightening body (40) is provided. It is formed. In this embodiment, a plurality of such molded portions (42) are arranged next to each other at regular intervals along the entire circumference of the clamp (40). For example, these molded portions have the same morphology and are aligned parallel to each other. The molded portion (42) has a trapezoidal cross section with a sufficiently flat bottom that is physically connected to the rest of the clamp via an annular ramp. ing. The molded portion (42) extends mainly in the direction of the vertical axis line L of the rotor shaft (16) or the tightening ring (40). An air chamber is confined between each molded portion (42) and the outer peripheral portion of the rotor shaft (16), and the air chamber allows the molded portion (42) to be radially attached to the clamp body (40). Gives elasticity.

The central division (40b) of the tightening body (40) is followed by an end division (40c), and this end division (40c) is again divided into a plurality of axial regions in the direction of the vertical axis L. .. The first axial region (44) located adjacent to the central compartment again abuts coplanarly on the peripheral surface of the rotor axis (16) under selectable radial preload. On the other hand, the second axial region (46) continuing to the opposite side of the central region protrudes beyond the end of the rotor shaft (16). The end section (40c) generally has the length of the central section (40b) of the tightening body (40), and is the first when viewed in the direction of the vertical axis line L of the rotor axis (16). It is configured to be longer than the axial region (44). A fixing means (50, 52) is integrally configured with the clamp body (40) in the second axial region (46) protruding beyond the rotor shaft (16). The fixing means (50, 52) is a tongue piece-shaped protrusion of the clamp body (40). The first fixing means (50) extends inward at a right angle from the peripheral surface of the tightening body (40), or protrudes inward in the radial direction from the peripheral surface of the tightening body (40). On the other hand, the second fixing means (52) is aligned in parallel with the vertical axis line L. The axis of the signal transmitter (24) in the illustrated mounted state between the inwardly oriented first fixing means (50) and the end face of the rotor shaft (16) in the direction of the vertical line L. There is a directional spacing or gap. A plurality of the first and second fixing means (50, 52) can be specified according to the intended use, and are arranged side by side along the peripheral surface of the tightening body (40). In this case, the alternate arrangement of the fixing means (50, 52) is not always necessary. The first fixing means (50), which is directed inward in the radial direction, is manufactured, for example, by folding these tongue-shaped protrusions along the peripheral surface of the clamp body (40) once individually. be able to.

The problem of the fixing means (50, 52) is that the magnet element (26) of the signal transmitter (24) is inside the cup-shaped holding member (28), and these magnet elements (26) are the holding member (28). Friction fastening type or shape fastening type without performing translational movement in the axial direction and rotational movement in the circumferential direction with respect to the magnet element (26) and without requiring fixing of the material coupling type of the magnet element (26). Is to fix it to.

For this reason, the magnet element (26) is sufficiently cylindrical and has plane-parallel end faces aligned perpendicular to the vertical line L. The first fixing means (50) of the tightening body (40) is engaged with the end face facing the end of the rotor shaft (16), and the magnet element (26) is the first fixing means (50). The end face on the opposite side abuts on the bottom (54) of the cup-shaped holding member (28) with an adjustable axial preload. A pair of flat key surfaces (56) facing each other are formed on the peripheral surface of the magnet element (26), and the second fixing means (52) of the tightening body (40) is formed on these key surfaces (56). Engage, thereby making possible rotational movement of the magnet element (26) relative to the holding member (28) no longer possible. Instead of the key surface (56), the magnet element (26) may have, for example, an axially oriented notch in which the fixing means (52) engages.

The holding member (28) is configured in a cup shape as described above, and has a cylindrical shaft (58) and a bottom portion (54) configured at the end of the shaft (58). By fitting the holding member (28) over the tightening body (40), on the one hand, between the holding member (28) and the tightening body (40), on the other hand, the tightening body (40) and the rotor shaft (40). 16), the holding member (28) is fixed to the tightening body (40) in an axially immovable and relative non-rotatable manner, and at the same time, the tightening body (40) is fixed in the axial direction and relative to each other. The inner diameter of the holding member (28) becomes the outer diameter of the tightening body (40) within the region of the molded portion (42) so that the radial force fixed to the rotor shaft (16) is adjusted so as to rotate and immovably. It is matched. Structurally effective radial forces can be adjusted by aligning the inner or outer dimensions of the retaining member (28), clamp (40) and rotor shaft (16) with each other. In the final mounted state of the signal transmitter (24), the shaft (58) of the holding member (28) covers the clamp (40) in the circumferential direction. The bottom (54) can cover the entire cross section of the holding member (28), thereby protecting the magnet element (26) located inside the holding member (28) from damage and / or dirt. Or, in some cases, a gap may be provided at the bottom (54). The cup-shaped holding member (28) is otherwise non-strong like the clamp (40) so as not to weaken or affect the magnetic field of the magnet element (26). Manufactured from magnetic materials.

FIG. 3 is a top view of the signal transmitter (24) from which the holding member (28) has been removed. It can be seen that the magnet element (26), which is configured in a substantially cylindrical shape, has a flat key surface (56) facing each other. The fixing means (52) abuts on these key surfaces (56) in a shape-fastening manner and extends perpendicular to the plane of the drawing, thus identifying only as the intersection of the center lines passing through the magnet element (26). The magnet element (26) is fixed against the rotation around the vertical line L which can be performed. The first fixing means (50), shown by the dashed line because it is covered by the magnet element (26), is in contact with the lower end face, which is not visible in the drawing of the magnet element (26), and is magnetized. The element (26) is frictionally fastened and pressed upward as viewed in a plane, thereby fixing the magnet element (26) so as not to be axially movable within the holding member (28) removed in FIG. do. A total of four first fixing means (50) and two second fixing means (52) are illustrated, in which case the relative arrangements of the illustrated fixing means (50, 52) are also numbered. Please understand that this is just an example and is not limited to this.

Various methods can be introduced for attaching the signal transmitter (24) to the rotor shaft (16).

In the first method, the tightening body (40) is first pressed onto the rotor shaft (16) in the axial direction until just before the predetermined end position, and then the magnet element (26) is fixed to the tightening body (40). It is attached to the tightening body (40) by means (50, 52), and finally, the cup-shaped holding member (28) is put on the structure group including the tightening body (40) and the magnet element (26). It has become like. In this way, the holding member (28), together with the clamping body (40) and the magnet element (26), is fitted on the rotor shaft (16) in a sized manner, thereby transmitting a signal on the rotor shaft (16). The end position of the vessel (24) is adjusted.

A second alternative method is to first manufacture the signal transmitter (24) and then fix the temporarily assembled signal transmitter (24) to the rotor shaft (16). For this purpose, the magnet element (26) is first attached to the clamp (40), and then this structure group holds the signal transmitter (24) while abutting the magnet element (26) to the bottom (54). It is inserted into the member (28). The signal transmitter (24) is then fitted as a structural unit over the rotor shaft (16) until it occupies its terminal position.

Of course, changes or supplements beyond this disclosure can be introduced without departing from the basic ideas of the invention described. This basic idea is relative, especially so that the signal transmitter (24) can be frictionally fastened and / or shape fastened to the rotor shaft (16), thus eliminating the costly manufacturing bond. The point is that it is arranged so that it cannot rotate and cannot move in the axial direction.

10 Electronically rectified machine, drive device 12 Motor 14 Rotor 16 Rotor shaft 18 Housing 20 Rolling bearing 22 Eccentric member 24 Signal transmitter 26 Magnet element 28 Holding member 30 Mandrel 34 Receiving part 40 Tightening body, tightening Ring 40a 1st tightening body division 40b Central division, central region 40c End division 42 Molding part 44 1st axial region 46 2nd axial region 50 1st fixing means 52 2nd fixing means 54 Bottom 56 Key surface 58 Shaft L Vertical axis line

Claims (12)

An electronically rectified machine (10), especially an electronically rectified motor, a rotor (14) and a signal transmitter (24) mounted on a rotor shaft (16) that can be operated by rotary motion. ), And the signal transmitter (24) particularly in order to detect the rotation angle of the rotor (14) and / or the rotor shaft (16), the rotor shaft (16). In a form having a holding member (28) fixed so as not to be relatively rotatable and a magnet element (26) arranged on the holding member (28).
The rotor shaft (16) is confined between the inner diameter of the holding member (28) and the outer diameter of the rotor shaft (16). ), The tightening body (40) has at least one fixing means (50, 52) acting on the magnet element (26), and the fixing means (50, 52) is fixed. Electronically, the magnet element (26) is prevented from translating and rotating relative to the holding member (28) in the attached state of the signal transmitter (24). Machine rectified to (10). The holding member (28) is configured in a cup shape, and the magnet element (26) is received inside the holding member (28).
The electronically rectified machine according to claim 1, wherein the first fixing means (50) abuts the magnet element (26) on the bottom portion (54) of the holding member (28). 10). The first fixing means (50) of the magnet element (26) is aligned at right angles to the vertical line L of the tightening body (40) and faces the rotor axis (16). The electronically rectified machine (10) according to claim 2, wherein the machine abuts on an end face. 2. The magnet element (26) is pressed against the bottom portion (54) of the holding member (28) by the first fixing means (50) under an axial preload. Or the electronically rectified machine (10) according to 3. At least one second fixing means (52) is provided, and the second fixing means (52) cooperates with the magnet element (26) while forming a shape fastening portion. The electronically rectified machine (10) according to any one of claims 1 to 4. The second fixing means (52) extends in parallel with the vertical axis L of the tightening body (40) and is disposed at least correspondingly to the peripheral surface of the magnet element (26). The electronically rectified machine (10) according to claim 5, characterized in contact with one key surface (56). The first and second fixing means (50, 52) are integrally configured with the tightening body (40), respectively, and are arranged along the peripheral surface of the tightening body (40). The electronically rectified machine (10) according to claim 5 or 6. One of claims 1 to 7, wherein the fixing means (50, 52) is formed on the side of the tightening body (40) facing the magnet element (26). The electronically rectified machine (10) according to the item. The magnet element (26) is characterized in that it can be arranged so as not to be axially movable and relatively non-rotatable with respect to the holding member (28) by using the fixing means (50, 52) without an adhesive. The electronically rectified machine (10) according to any one of claims 1 to 8. In particular, in an electronically slip-controllable brake device for an automobile, a pressure generator and electronically rectified electronically rectified having the characteristics of any one of claims 1 to 9 for driving the pressure generator. An electronically slip-controllable braking device with the machine (10). It has a rotor (14) and a signal transmitter (24) provided on a rotor shaft (16) that can be operated by rotary motion, and the signal transmitter (24) is the rotor (14) and /. Alternatively, a holding member (28) firmly fixed to the rotor shaft (16) and a magnet element fixed to the holding member (28) in order to detect the rotation angle of the rotor shaft (16) in particular. In a method for manufacturing an electronically rectified machine (10), particularly an electronically rectified motor, having (26).
A tightening body (40) provided with fixing means (50, 52) is attached to the rotor shaft (16).
The magnet element (26) of the signal transmitter (24) is arranged on the tightening body (40) by using the fixing means (50, 52).
The cup-shaped holding member (28) of the signal transmitter (24) is put on and fitted to the tightening body (40) provided with the magnet element (26).
A method for manufacturing an electronically rectified machine (10), particularly an electronically rectified motor. It has a rotor (14) and a signal transmitter (24) provided on a rotor shaft (16) that can be operated by rotary motion, and the signal transmitter (24) is the rotor (14) and /. Alternatively, in order to detect the rotation angle of the rotor shaft (16) in particular, the holding member (28) fixed to the rotor shaft (16) so as not to be relatively rotatable and the holding member (28) are arranged. In a method for manufacturing an electronically rectified machine (10), particularly an electronically rectified motor, having a magnet element (26).
The magnet element (26) of the signal transmitter (24) is first placed on the tightening body (40) by using the fixing means (50, 52) of the tightening body (40).
Next, the constituent unit including the tightening body (40) and the magnet element (26) is inserted into the holding member (28) of the signal transmitter (24) configured in a cup shape.
Next, the holding member (28) having the magnet element (26) and the tightening body (40) is put on and fitted to one end of the rotor shaft (16).
A method for manufacturing an electronically rectified machine (10), particularly an electronically rectified motor.

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