JP2018201274A - Position adjustment structure for resolver - Google Patents

Abstract

To provide a position adjustment structure for a resolver capable of eliminating the need to re-adjust a temporarily adjusted position of a resolver stator in a circumferential direction (a position in a circumferential direction in relative to a stator housing).SOLUTION: In a part of an outer peripheral edge of a resolver stator 37, an adjustment recess 37t including a first adjustment face 37g and a second adjustment face 37h that are opposite to each other in a circumferential direction is formed. In a stator housing, an adjustment base part (31n) that covers an outer peripheral side of the adjustment recess is provided. In the adjustment base part, a first hole part 31g that is a through-hole toward the first adjustment face and a second hole part 31h that is a through-hole toward the second adjustment face are formed. The first hole part is a through-hole for pushing the first adjustment face in the circumferential direction from the second adjustment face to the first adjustment face in accordance with an inserting or threading amount by a pin or a screw. The second hole part is a through-hole for pushing the second adjustment face in the circumferential direction from the first adjustment face to the second adjustment face in accordance with an inserting or threading amount by a pin or a screw.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a position adjusting structure for a resolver that detects a rotation angle of a rotor with respect to a stator.

  In recent years, electric motors are used in various devices. In order to improve controllability and efficiency, a resolver, which is a rotation angle sensor that detects an accurate rotation angle of the rotor with respect to the stator, is attached to the electric motor. The resolver includes a resolver stator attached to a stator housing that includes (or is fixed to the stator) a stator, and a resolver rotor that is attached to a rotor housing that includes a rotor (or is fixed to the rotor). And the resolver stator needs the position adjustment of the circumferential direction in order to match | combine a phase with each coil of the stator of an electric motor.

  For example, Patent Document 1 discloses a stator fixing structure that fixes a resolver stator and a circumferential position of the stator with respect to the rotor using a keyway, a knock pin, or the like.

JP2013-93985A

  In the stator fixing structure described in Patent Document 1, it is described that fine adjustment of the circumferential position of the resolver stator with respect to the rotor is unnecessary. However, the circumferential position error of each coil provided in the resolver stator, the circumferential position error of the hole through which the knock pin is inserted, the circumferential error of the resolver rotor shape, the circumferential direction of the resolver rotor mounting position There are various errors in the circumferential error, such as the above error, and the accumulation of these errors affects the detection accuracy of the resolver. Therefore, in order to ensure the detection accuracy of the resolver more reliably, it is preferable to finely adjust the circumferential position of the resolver stator.

  Here, using FIGS. 12 to 14, an example of the structure of the conventional stator housing 131 fixed to the stator and the conventional resolver stator 137 and the circumferential position of the resolver stator 137 are adjusted to adjust the stator. An example of a conventional process for fixing the resolver stator 137 to the housing 131 will be described.

  FIG. 12 shows a schematic front view of a conventional stator housing 131. The stator housing 131 has a resolver mounting surface 131m for mounting a conventional resolver stator 137 (see FIG. 13). On the outer periphery of the resolver mounting surface 131m, a resolver holding wall 131n is erected so as to surround the outer periphery of the mounted resolver stator 137. A plurality of fixing holes 131p corresponding to a plurality of long holes 137p (see FIG. 13) formed in the resolver stator 137 are formed in the resolver mounting surface 131m, and adjustment holes 137q formed in the resolver stator 137. An adjustment long hole 131q corresponding to (see FIG. 13) is formed.

  FIG. 13 shows a schematic front view of a conventional resolver stator 137. The conventional resolver stator 137 has a donut disk shape, and a plurality of coils and the like are arranged in the circumferential direction on the inner peripheral side. The resolver stator 137 has a plurality of long holes 137p corresponding to the plurality of fixing holes 131p (see FIG. 12) of the stator housing 131, and corresponds to the adjustment long holes 131q (see FIG. 12) of the stator housing 131. An adjustment hole 137q is formed.

  FIG. 14 shows the position of the resolver stator 137 in the circumferential direction relative to the stator housing 131 by placing the conventional resolver stator 137 shown in FIG. 13 on the resolver mounting surface 131m of the conventional stator housing 131 shown in FIG. It is a figure explaining a mode that it adjusts. The operator places the resolver stator 137 on the resolver mounting surface 131m, inserts the adjustment pin 131r from the adjustment hole 137q to the adjustment long hole 131q, and inserts the adjustment pin 131r in the circumferential direction along the adjustment long hole 131q. By moving, the position of the resolver stator 137 in the circumferential direction with respect to the stator housing 131 is adjusted.

Examples of the procedure of the conventional process when the conventional resolver stator 137 is fixed to the conventional stator housing 131 by adjusting the position in the circumferential direction are shown in the following (conventional process 1) to (conventional process 5). It will be a thing.
(Conventional process 1) An operator places the resolver stator 137 on the resolver mounting surface 131m of the stator housing 131. Although not shown, the operator fixes the resolver rotor to the rotor housing, positions the rotor housing with respect to the stator housing 131, and sets the “axial position” of the resolver stator 137 to the original position with respect to the resolver rotor. To do. The “circumferential position” of the resolver stator 137 is adjusted by the operator in the subsequent steps.
(Conventional process 2) The operator rotates the rotor housing, measures the waveform output from the resolver stator 137 using a waveform measuring instrument (such as an oscilloscope), and obtains the circumferential shift amount of the resolver stator 137. .
(Conventional process 3) As described above, the operator moves the adjustment pin 131r along the adjustment long hole 131q by an amount corresponding to the obtained amount of deviation, so that the resolver stator 137 with respect to the stator housing 131 is obtained. Adjust the position in the circumferential direction.
(Conventional process 4) An operator inserts a fastening member such as a bolt into the long hole 137p and the fixing hole 131p to fix the resolver stator 137 to the stator housing 131.
(Conventional process 5) An operator rotates a rotor housing, measures the waveform output from the resolver stator 137 using a waveform measuring device, and reconfirms the amount of deviation of the resolver stator 137 in the circumferential direction. If the reconfirmed amount of deviation is within an allowable error, the operation is terminated. However, if the reconfirmed misalignment exceeds the allowable error, the operator loosens the bolts and the like used for fixing and starts over from (conventional process 2).

  At the time of adjusting the circumferential position of the resolver stator 137 with respect to the stator housing 131 in the above (conventional process 3), the circumferential position of the resolver stator 137 is not fixed with respect to the stator housing 131. For this reason, when the resolver stator 137 is fixed to the stator housing 131 in the above (conventional process 4) using a fastening member such as a bolt, the circumferential position of the resolver stator 137 may be displaced. For this reason, the amount of deviation may exceed an allowable error in (conventional process 5). When redoing from (conventional process 2) after (conventional process 5) (when adjusting the circumferential position of the resolver stator once adjusted), it takes time and effort, which is not preferable.

  The present invention was devised in view of the above points, and the position of the resolver that can eliminate the need for readjustment of the circumferential position (the circumferential position with respect to the stator housing) of the resolver stator once adjusted. It is an object to provide an adjustment structure.

  In order to solve the above problems, a first aspect of the present invention provides a position adjusting structure for a resolver that detects a rotation angle of a rotor with respect to a stator, and the resolver is fixed to a stator housing including the stator or the stator. An annular resolver stator attached to the stator housing, and an annular resolver rotor attached to the rotor housing including the rotor or the rotor housing fixed to the rotor, and a part of the outer peripheral edge of the resolver stator Is formed with an adjustment recess having a first adjustment surface and a second adjustment surface, which are surfaces facing each other in the circumferential direction, having a shape that is concave toward the radially inner side, The outer peripheral side of the resolver stator in the stator housing is at least as viewed from the outside in the radial direction. An adjustment base portion is provided to cover the outer peripheral side of the adjustment recess, and the adjustment base portion is a through-hole extending from the outer peripheral surface of the adjustment base portion to the first adjustment surface, and a pin or a screw is inserted therethrough. Alternatively, when screwed, the first adjustment surface can be pushed in the circumferential direction from the second adjustment surface toward the first adjustment surface according to the amount of insertion of the pin or the screwing amount of the screw. When the pin or screw is inserted or screwed into the first hole and the through hole from the outer peripheral surface of the adjustment base to the second adjustment surface A second through hole for allowing the second adjustment surface to be pushed in a circumferential direction from the first adjustment surface toward the second adjustment surface in accordance with the insertion amount of the screw or the screwing amount of the screw. A hole is formed, A position adjusting structure of the resolver.

  Next, a second invention of the present invention is a resolver position adjusting structure according to the first invention, wherein the first hole portion and the second hole portion are female screws. It is a position adjustment structure.

  Next, a third aspect of the present invention is a resolver position adjusting structure according to the first aspect or the second aspect of the present invention, wherein the penetrating direction of the first hole and the penetrating direction of the second hole. Is set so that the first hole axis that is the center axis of the first hole and the second hole axis that is the center axis of the second hole intersect radially outside the adjustment base. This is a resolver position adjustment structure.

  According to the first invention, the position of the resolver stator in the circumferential direction from the second adjustment surface to the first adjustment surface can be adjusted by the pin or screw using the first hole. Further, the position of the resolver stator in the circumferential direction from the first adjustment surface to the second adjustment surface can be adjusted by a pin or a screw using the second hole. The position of the resolver stator in the circumferential direction can be fixed by the pin or screw using the first hole and the pin or screw using the second hole. That is, both adjustment of the circumferential position of the resolver stator and fixation of the circumferential position can be performed. Therefore, readjustment of the circumferential position of the resolver stator (the circumferential position with respect to the stator housing) once adjusted can be eliminated.

  According to the second invention, by using the first hole and the second hole as female screws and using the screws for the first hole and the second hole, finer adjustment than when using a pin is used. And more reliable fixing can be realized.

  According to the third invention, the distance between the pin or screw used for the first hole and the pin or screw used for the second hole can be made narrower, so that the adjustment opening (for example, adjustment) ) And the like for inserting a tool or the like can be made smaller. In addition, the angle of the pin or screw in the pushing direction with respect to the first adjustment surface and the angle of the pin or screw in the pushing direction with respect to the second adjustment surface can be made closer to the right angle, and the circumferential position of the resolver stator can be changed. Adjustment and fixation can be performed more appropriately.

It is a perspective view explaining the example of the external appearance of the power unit which has an engine and a rotary electric machine (rotary electric machine to which the position adjustment structure of the resolver of this application is applied). It is a disassembled perspective view explaining the whole structure of the rotary electric machine in the power unit shown in FIG. FIG. 2 is a cross-sectional view of an engine housing and a rotating electrical machine cut along an XZ plane passing through a rotation axis in the power unit shown in FIG. 1. It is a figure explaining the external appearance of an end plate (equivalent to a stator housing). It is VV sectional drawing in FIG. It is a figure explaining the external appearance of a resolver rotor. It is a figure explaining the external appearance of a resolver stator. It is a figure explaining the example which adjusts the position of the circumferential direction of a resolver stator. FIG. 9 is an enlarged view of the periphery of the adjustment concave portion of the resolver stator in FIG. 8. It is a figure explaining the other example 1 of the penetration direction of a 1st hole part, and the penetration direction of a 2nd hole part with respect to FIG. It is a figure explaining the other example 2 of the penetration direction of a 1st hole part, and the penetration direction of a 2nd hole part with respect to FIG. It is a figure explaining the example of the external appearance of the conventional stator housing. It is a figure explaining the example of the external appearance of the conventional resolver stator. It is a figure explaining a mode that the position of the circumferential direction of the conventional resolver stator is adjusted with respect to the conventional stator housing.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. In addition, when the X axis, the Y axis, and the Z axis are described in the figure, the X axis, the Y axis, and the Z axis are orthogonal to each other, the Z axis direction indicates a vertically upward direction, and the X axis direction and the Y axis The direction indicates the horizontal direction, and the X axis indicates a direction parallel to the rotation axis 20x of the output shaft of the engine (and the rotor of the rotating electrical machine). In the following description of the embodiment, the power unit 10 having the rotating electrical machine 30 and the engine 20 to which the resolver position adjusting structure of the present invention is applied will be described as an example. However, the resolver position adjusting structure of the present invention is The present invention is not limited to the power unit described in the embodiment, and can be applied to various rotating electric machines.

● [Structure of power unit 10 (FIGS. 1 and 2)]
As shown in FIG. 1, the power unit 10 includes an engine 20 and a rotating electrical machine 30. For convenience, the X-axis direction (the direction from the engine 20 toward the rotating electrical machine 30) parallel to the rotation axis 20x of the output shaft 22 (crankshaft) of the engine 20 is defined as the “front” side, and the direction opposite to the X-axis direction is This will be described as the “back” side.

  As shown in FIG. 1, the engine 20 is disposed on the rear side of the rotating electrical machine 30, and one end portion (front end portion) of the output shaft 22 of the engine 20 projects from the front side of the engine housing 21 (corresponding to the housing). Has been. The output shaft 22 is connected to the rear end of the rotor 32 of the rotating electrical machine 30, and the output shaft 22 and the rotor 32 are coaxial and rotate together. Therefore, when the engine 20 is driven, the rotational power of the output shaft 22 is transmitted to the rotor 32. When the rotating electrical machine 30 is driven, the rotational power of the rotor 32 is transmitted to the output shaft 22. For example, an oil pump (not shown) is connected to the front end of the rotor 32. The engine housing 21 includes a cylinder head, a cylinder head cover, a cylinder block, a crankcase, an oil pan, and the like.

  As shown in FIG. 1, the rotating electrical machine 30 is disposed on the front side of the engine 20. As shown in FIGS. 1 and 2, the rotating electrical machine 30 includes an end plate 31, a rotor 32, a stator 33, a cover 34, and the like. Note that the end plate 31 corresponds to a stator housing fixed to the stator 33. In the description of the present embodiment, an example in which the resolver stator 37 is attached to the end plate 31 will be described. However, the resolver stator 37 may be attached to the stator 33 (stator housing including the stator).

  As shown in FIG. 2, the end plate 31 has a cylindrical shape having a bottom surface 31 a on the side of the engine 20 and opened on the side opposite to the engine 20. The bottom surface 31 a is provided with a plate through hole 31 b through which the output shaft 22 is inserted and an engine mounting hole 31 c corresponding to the end plate mounting hole 23 provided in the engine housing 21. The end plate 31 is fixed to the fastening surface 21 s of the engine housing 21 with a fastening member such as a bolt inserted through the engine mounting hole 31 c and the end plate mounting hole 23. A resolver stator 37 for detecting the rotation angle (rotation position) of the rotor 32 with respect to the stator 33 is attached to the bottom surface 31 a of the end plate 31 on the stator 33 side. The resolver stator 37 is a rotation sensor generally called a resolver as a pair with the resolver rotor 38. Further, the end plate 31 has a plurality of stator mounting portions 31e having stator mounting holes 31f for fixing the stator 33 on the outer peripheral portion on the stator 33 side.

  As shown in FIG. 2, the rotor 32 includes a rotor flange-shaped portion 32 a that extends radially outward on the engine 20 side, and a cylindrical cylindrical portion 32 x, for example, a rotor core of the rotor 32. Is embedded with permanent magnets. On the side of the engine 20 in the rotor 32, there is a hole (not shown) connected (fixed) to the output shaft 22 so as to be coaxial with the output shaft 22 of the engine 20. A resolver rotor 38 for detecting a rotation angle (rotation position) of the rotor 32 with respect to the stator 33 is attached to the engine 20 side of the rotor 32. When the rotating electrical machine 30 is assembled to the engine 20, the resolver rotor 38 is attached to the inner peripheral side of the resolver stator 37 so as to be coaxial with the resolver stator 37, and rotates integrally with the rotor 32. The rotor 32 has a plurality of mounting holes 32b for connecting an oil pump or the like on the cover 34 side.

  As shown in FIG. 2, the stator 33 includes a cylindrical portion 33 x having a cavity portion 33 b that has a stator coil 33 a inside and can accommodate the rotor 32, and a radial direction on an end surface of the cylindrical portion 33 x on the engine 20 side. An engine-side flange portion 33c that extends outward, and a cover-side flange portion 33d that extends radially outward at the end surface of the cylindrical portion 33x on the cover 34 side are provided. A plurality of plate attachment portions 33e having plate attachment holes 33f for fixing the stator 33 to the end plate 31 are provided on the outer peripheral portion of the engine side flange portion 33c. A plurality of cover attachment portions 33g having cover attachment holes 33h for fixing the cover 34 to the stator 33 are provided on the outer peripheral portion of the cover side flange portion 33d.

  As shown in FIG. 2, the cover 34 has a disk shape having a through hole 34 b that exposes a surface of the rotor 32 on the cover 34 side. An oil pump or the like is connected to the mounting hole 32 b formed in the rotor 32 exposed from the through hole 34 b and the mounting hole 34 k formed in the cover 34. A plurality of stator attachment portions 34 g having stator attachment holes 34 h for fixing the cover 34 to the stator 33 are provided on the outer periphery of the cover 34.

● [Internal structure of rotating electrical machine 30 and state of attachment of resolver stator 37 and resolver rotor 38 (FIG. 3)]
FIG. 3 shows a cross-sectional view of the engine housing 21 and the rotating electrical machine 30 taken along the XZ plane passing through the rotation axis 20x in FIG. As shown in FIG. 3, the output shaft 22 is inserted into a housing through hole 26 provided in the engine housing 21 and protrudes toward the rotating electrical machine 30 with respect to the engine housing 21. In the example shown in FIG. 3, the output shaft 22 is inserted through the housing through hole 26 and the plate through hole 31 b, and the shaft portion 32 y of the rotor 32 is fitted to the tip of the output shaft 22. A seal member S is provided via a seal retainer 25 at a position facing the outer peripheral surface of the output shaft 22 in the engine housing 21.

  As shown in FIG. 3, the stator 33 is provided on the engine side and extends radially outward, and is provided on the cover 34 side and extends radially outward. A cover-side flange portion 33d and a cylindrical portion 33x having a cylindrical shape provided between the engine-side flange portion 33c and the cover-side flange portion 33d are provided. A plurality of stator cores 33v around which stator coils 33a are wound are arranged on the inner peripheral surface of the cylindrical portion 33x in the circumferential direction. Further, as described above, the air gap 32g is set at a minute interval between the inner peripheral surface of the stator core 33v and the outer peripheral surface of the permanent magnet 32m of the rotor 32.

  As shown in FIG. 2, the cover 34 is formed with a through hole 34 b that exposes the surface on the cover 34 side of the cylindrical portion 32 x of the rotor 32. Further, a labyrinth portion 34r (see FIG. 3) is formed in a portion of the cover 34 around the outer peripheral portion of the through hole 34b. In the description of the present embodiment, the description of the oil pump connected to the rotor 32 is omitted, but a pump cover 77 of the oil pump is attached so as to cover the opening of the cover 34 as shown in FIG. It has been. Therefore, although the labyrinth portion 34r is formed, since the pump cover 77 is provided, there is no need to worry that dust or the like enters the rotor 32 or the stator 33 from the right side of the cover 34 in FIG.

  As shown in FIG. 3, the end plate 31 has a plate through hole 31b (see FIG. 2) through which the output shaft 22 or the rotor 32 is inserted (in this case, the output shaft 22 is inserted). A resolver stator 37 is fixed in the end plate 31 by a fastening member 31w (for example, a bolt). Further, a resolver rotor 38 fixed to the rotor 32 is disposed inside the resolver stator 37 in the radial direction, and the resolver rotor 38 is fixed by a holding member 32w.

  As shown in FIG. 3, the rotor 32 includes a cylindrical portion 32x, a rotor flange-shaped portion 32a, and a shaft portion 32y, and the cylindrical portion 32x, the rotor flange-shaped portion 32a, and the shaft portion 32y are integrally formed. It is formed to become. The distal end of the output shaft 22 is fitted into the shaft portion 32y, and the output shaft 22 and the rotor 32 rotate together around the rotation axis 20x. A permanent magnet 32 m is embedded in the rotor core of the rotor 32. The outer peripheral surface of the permanent magnet 32m faces the inner peripheral surface of the stator core 33v of the stator 33, and an air gap 32g is set between the permanent magnet 32m and the stator core 33v at a minute interval. ing. Further, a blocking plate 74 for preventing inflow of dust and the like from the cover 34 side into the rotor 32 is attached to the tip of the rotor 32 (the side opposite to the engine). Further, the outer peripheral end of the blocking plate 74 is bent and accommodated in a concave portion of a labyrinth portion 34r provided on the cover 34, so that a so-called labyrinth structure is formed in a maze shape. In the description of the present embodiment, the description of the oil pump connected to the rotor 32 is omitted, but a pump cover 77 of the oil pump is attached so as to cover the opening of the cover 34 as shown in FIG. It has been. Therefore, although the labyrinth portion 34r is formed, since the pump cover 77 is provided, there is no need to worry that dust or the like enters the rotor 32 or the stator 33 from the right side of the cover 34 in FIG. A resolver rotor 38 is fixed to the outer peripheral surface of the shaft portion 32y of the rotor 32 by a holding member 32w. The holding member 32w has a convex portion extending rearward along the rotation axis 20x, and the convex portion is accommodated in a concave portion formed in the end plate 31, and is a so-called maze. It is a labyrinth structure.

[Adjustment structure of the circumferential position of the resolver stator 37 attached to the end plate 31 (FIGS. 4 to 9)]
FIG. 4 is a front view of the end plate 31 (corresponding to the stator housing) shown in FIG. 2 as viewed along the rotation axis 20x from the stator 33 side. 5 is a cross-sectional view taken along line VV in FIG. 4 and 5, a holding member 32w (see FIG. 3), a holding member facing surface 31j that forms a labyrinth structure, and a groove 31k (see FIG. 3) are formed on the outer peripheral side of the plate through hole 31b. ing. A resolver mounting surface 31m on which the resolver stator 37 (see FIG. 3) is placed is formed on the outer peripheral side of the holding member facing surface 31j. The resolver mounting surface 31m is formed with a plurality of fixing holes 31p for fixing the resolver stator 37 that is placed and whose circumferential position is adjusted. A resolver holding wall 31n is formed on the outer peripheral side of the resolver mounting surface 31m so as to surround the outer periphery of the resolver stator when the resolver stator is placed on the resolver mounting surface 31m. The inner diameter of the resolver holding wall 31n is set to be slightly larger than the outer diameter of the resolver stator. The resolver holding wall 31n corresponds to the adjustment base portion. The resolver holding wall 31n is formed with a first hole 31g and a second hole 31h penetrating from the outer peripheral surface to the inner peripheral surface of the resolver holding wall 31n.

  FIG. 6 is a front view of the resolver rotor 38. The resolver rotor 38 has an annular shape, and the outer diameter is set smaller than the inner diameter of the resolver stator 37 (see FIG. 7). As shown in FIG. 6, the outer peripheral surface of the resolver rotor 38 is uneven in the radial direction. The structure of the resolver rotor 38 is the same as the conventional structure.

  FIG. 7 is a front view of the resolver stator 37. The resolver stator 37 has an annular shape, and a plurality of position detecting means (for example, a plurality of coils) facing the outer peripheral surface of the resolver rotor 38 are arranged along the circumferential direction on the inner peripheral side. Each position detecting means is connected to the connector portion 37c. The resolver stator 37 is formed with a plurality of elongated holes 37p corresponding to the plurality of fixing holes 31p shown in FIG. An adjustment concave portion 37t having a concave shape toward the radially inner side is formed in a part of the outer peripheral edge portion of the resolver stator 37. The adjustment recess 37t has a first adjustment surface 37g and a second adjustment surface 37h, which are surfaces facing each other in the circumferential direction.

  FIG. 8 shows a state where the resolver stator 37 is placed on the resolver mounting surface 31m of the end plate 31 shown in FIG. 4, the screw N1 is screwed into the first hole 31g, and the screw N2 is screwed into the second hole 31h. Show. In FIG. 8, for reference, the position where the resolver rotor 38 is disposed is also shown.

  As shown in FIG. 8, a resolver holding wall 31n (corresponding to an adjustment base portion) covering at least the outer periphery of the adjustment recess 37t when viewed from the outside in the radial direction is provided on the outer periphery of the resolver stator 37 in the end plate which is a stator housing. Is provided. The first hole 31g is formed as a through hole from the outer peripheral surface of the resolver holding wall 31n toward the first adjustment surface 37g of the adjustment recess 37t, and the first hole 31g is a female screw. Therefore, when the screw N1 is screwed into the first hole 31g, the tip of the screw N1 comes into contact with the first adjustment surface 37g. When there is no screw N2 in the second hole 31h, when the screw N1 is screwed into the first hole 31g, the screw N1 changes the first adjustment surface 37g and the second adjustment surface 37h according to the screwing amount of the screw N1. To the first adjustment surface 37g in the circumferential direction. That is, the resolver stator 37 can be rotated in the direction from the second adjustment surface 37h toward the first adjustment surface 37g, and the circumferential position of the resolver stator 37 can be adjusted.

  Similarly, the second hole portion 31h is formed as a through hole from the outer peripheral surface of the resolver holding wall 31n toward the second adjustment surface 37h of the adjustment recess 37t, and the second hole portion 31h is a female screw. . Therefore, when the screw N2 is screwed into the second hole 31h, the tip of the screw N2 comes into contact with the second adjustment surface 37h. When the screw N1 does not exist in the first hole 31g, when the screw N2 is screwed into the second hole 31h, the screw N2 changes the second adjustment surface 37h and the first adjustment surface 37g according to the screwing amount of the screw N2. Is pushed in the circumferential direction toward the second adjustment surface 37h. That is, the resolver stator 37 can be rotated in the direction from the first adjustment surface 37g toward the second adjustment surface 37h, and the circumferential position of the resolver stator 37 can be adjusted.

  When the adjustment of the circumferential position of the resolver stator 37 is completed with the screw N1 screwed into the first hole 31g, the operator contacts the screw N2 with the second hole 31h and the second adjustment surface 37h. Until the position of the resolver stator 37 in the circumferential direction can be fixed. Alternatively, when the adjustment of the circumferential position of the resolver stator 37 is completed with the screw N2 screwed into the second hole 31h, the operator places the screw N1 in the first hole 31g and the first adjustment surface 37g. The position of the resolver stator 37 in the circumferential direction can be fixed by screwing in until it comes into contact.

  Next, referring to FIG. 9, the direction (through direction) of the first hole axis 31gj, which is the central axis of the first hole 31g, and the direction (through) of the second hole axis 31hj, which is the central axis of the second hole 31h. Direction). FIG. 9 is an enlarged view around the adjustment recess 37t in FIG. Here, a straight line passing through the center of the adjustment recess 37t and the rotation axis 20x is defined as a virtual recess center line 20yj. The penetrating direction of the first hole 31g and the penetrating direction of the second hole 31h are set so that the first hole axis 31gj and the second hole axis 31hj intersect on the radially outer side than the adjustment recess 37t. In the example shown in FIG. 9, the intersection Q of the first hole axis 31gj and the second hole axis 31hj is set to be radially outward from the adjustment recess 37t and on the virtual recess center line 20yj. In the example shown in FIG. 9, the intersection of the virtual first extension line 37gs extending the first adjustment surface 37g and the virtual second extension line 37hs extending the second adjustment surface 37h in the XY plane is the adjustment recess 37t. The adjustment surface opening angle θ, which is the angle of the second adjustment surface 37h with respect to the first adjustment surface 37g, is set so as to be between the rotation axis 20x.

  When the penetration direction of the first hole 31g and the second hole 31h is the example shown in FIG. 9, the interval D1 between the screw N1 and the screw N2 is larger than the interval D2 in FIG. 10 and the interval D3 in FIG. It is possible to make it narrower. Therefore, it is preferable in that the adjustment opening (not shown) for inserting a tool for screwing the screws N1 and N2 can be further reduced. Further, the angle in the pushing direction of the screw N1 with respect to the first adjustment surface 37g and the angle in the pushing direction of the screw N2 with respect to the second adjustment surface 37h are made more perpendicular than those in FIGS. 10 and 11 described later. Since the angle can be made close, adjustment and fixation of the circumferential position of the resolver stator 37 can be performed more appropriately.

[Procedure for adjusting and fixing the circumferential position of the resolver stator 37 with respect to the end plate 31 (stator housing)]
The steps of the steps of attaching the resolver stator 37 to the resolver attachment surface 31m of the end plate 31 and adjusting the position in the circumferential direction to fix the same are as shown in the following [Step 1] to [Step 5]. Become.
[Step 1] An operator places the resolver stator 37 on the resolver mounting surface 31m of the end plate 31 (stator housing), the screw N1 in the first hole 31g, and the screw N2 in the second hole 31h. The resolver stator 37 is temporarily fixed by screwing. Although not shown, the operator fixes the resolver rotor 38 to the rotor housing, positions the rotor housing with respect to the end plate 31, and sets the “axial position” of the resolver stator 37 relative to the resolver rotor 38 to the original position. Set to. The “circumferential position” of the resolver stator 37 is adjusted by the operator in the subsequent steps.
[Step 2] The operator rotates the rotor housing, measures the waveform output from the resolver stator 37 using a waveform measuring instrument (such as an oscilloscope), and determines the amount of deviation in the circumferential direction of the resolver stator 37.
[Step 3] The operator adjusts the screwing amounts of the screw N1 of the first hole portion 31g and the screw N2 of the second hole portion 31h according to the obtained shift amount, so that the circumference of the resolver stator 37 is adjusted. Adjust the position of the direction. The resolver stator 37 is adjusted in the circumferential position and “fixed in the circumferential position” by the screw N1 of the first hole 31g and the screw N2 of the second hole 31h.
[Step 4] The operator inserts (fastens) a fastening member 31w such as a bolt (see FIG. 3) into the long hole 37p and the fixing hole 31p to fix the resolver stator 37 to the stator housing 31.
[Step 5] The operator rotates the rotor housing, measures the waveform output from the resolver stator 37 using a waveform measuring instrument, and reconfirms the circumferential shift amount of the resolver stator 37. In the [Step 3], the resolver stator 37 is adjusted in the circumferential position and fixed in the circumferential direction. Therefore, when the resolver stator 37 is fixed with the fastening member in the [Step 4], the circumferential position is set. There is no deviation. Therefore, when the amount of deviation in the circumferential direction is reconfirmed in [Step 5], the amount of deviation does not exceed the allowable error. Therefore, “redo” that returns to [Step 2] does not occur. Therefore, the readjustment of the circumferential position of the resolver stator 37 (the circumferential position with respect to the stator housing) once adjusted can be eliminated. In addition, after [Step 5], the screw N1 and the screw N2 that are no longer necessary may be extracted.

● [Another example 1 of the penetration direction of the first hole 31g and the second hole 31h (FIG. 10)]
FIG. 10 shows an example in which the penetration direction of the first hole 31g and the second hole 31h is set in parallel to FIG. In this case, since the screwing direction of the screw N1 and the screwing direction of the screw N2 are parallel, when the operator gradually screws the screws N1 and N2, there is no need to change the direction of the screwing tool. It becomes easy.

● [Another example 2 of the penetration direction of the first hole 31g and the second hole 31h (FIG. 11)]
FIG. 11 is different from FIG. 9 in the penetration direction of the first hole 31g and the second hole 31h so that the first hole axis 31gj and the second hole axis 31hj intersect radially inside the adjustment recess 37t. An example of setting is shown. In this case, the amount of movement of the resolver stator 37 in the circumferential direction relative to the screwed amount of the screw N1 and the screw N2 is smaller than in the case of FIGS. 9 and 10, which is convenient for finer adjustment of the circumferential position. It is.

  The appearance, shape, configuration, structure, etc. of the end plate 31 (resolver stator), resolver stator 37, etc. in the resolver position adjustment structure of the present invention are the same as the appearance, shape, configuration, structure, etc. described in the present embodiment. It is not limited, and various changes, additions and deletions can be made without changing the gist of the present invention.

  The resolver position adjusting structure described in the present embodiment is not limited to the rotating electric machine in the power unit having the engine and the rotating electric machine, and can be applied to the rotating electric machine mounted on various devices.

  In the description of the present embodiment, an example has been described in which both the first hole 31g and the second hole 31h are female screws, and the screws N1 and N2 are screwed into the first hole and the second hole, respectively. However, the first hole 31g and the second hole 31h are formed as simple through holes without screw grooves, and the pins P1 and P2 (which do not have threads) are inserted instead of the screws N1 and N2. You may make it do. Alternatively, the first hole 31g may be a female screw, the second hole 31h may be a simple through hole, a screw may be screwed into the first hole, and a pin may be inserted into the second hole.

10 power unit 20 engine 20x rotation axis 21 engine housing (housing)
22 Output shaft (crankshaft)
23 End plate mounting hole 26 Housing through hole 30 Rotating electric machine 31 End plate 31a Bottom surface 31b Plate through hole 31c Engine mounting hole 31e Stator mounting portion 31f Stator mounting hole 31g First hole 31gj First hole axis 31h Second hole 31hj First 2-hole axis 31j Holding member facing surface 31m Resolver mounting surface 31n Resolver holding wall (adjustment base part)
31p Fixing hole 32 Rotor 32a Rotor flange-like portion 32b Mounting hole 32g Air gap 32m Permanent magnet 32x Cylindrical portion 32y Shaft portion 33 Stator 33a Stator coil 33b Hollow portion 33c Engine side flange portion 33d Cover side flange portion 33e Plate mounting portion 33f Plate Attachment hole 33g Cover attachment portion 33h Cover attachment hole 34 Cover 34b Through hole 34g Stator attachment portion 34h Stator attachment hole 37 Resolver stator 37c Connector portion 37g First adjustment surface 37h Second adjustment surface 37p Long hole 37t Adjustment recess 38 Resolver rotor 77 Pump Cover N1, N2 Screw S Seal member

Claims (3)

A resolver position adjustment structure for detecting a rotation angle of a rotor with respect to a stator,
The resolver includes an annular resolver stator attached to a stator housing including the stator or a stator housing fixed to the stator, and an annular resolver rotor attached to a rotor housing including the rotor or a rotor housing fixed to the rotor. And having
A part of the outer peripheral edge of the resolver stator has a shape that is concave toward the inside in the radial direction, and has a first adjustment surface and a second adjustment surface that are surfaces facing each other in the circumferential direction. The adjustment recess is formed,
On the outer peripheral side of the resolver stator in the stator housing, an adjustment base portion that covers at least the outer peripheral side of the adjustment concave portion when viewed from the outside in the radial direction is provided,
In the adjustment base portion,
A through hole extending from the outer peripheral surface of the adjustment base portion toward the first adjustment surface, and when a pin or screw is inserted or screwed in, the first or second screw is inserted in accordance with the insertion amount of the pin or the screwing amount of the screw. A first hole that is a through-hole for allowing one adjustment surface to be pushed in a circumferential direction from the second adjustment surface toward the first adjustment surface;
A through hole extending from the outer peripheral surface of the adjustment base portion to the second adjustment surface, and when a pin or screw is inserted or screwed in, the first or second screw is inserted in accordance with the insertion amount of the pin or the screwing amount of the screw. A second hole, which is a through hole for allowing the two adjustment surfaces to be pushed in a circumferential direction from the first adjustment surface toward the second adjustment surface;
Is formed,
Resolver position adjustment structure. The resolver position adjusting structure according to claim 1,
The first hole and the second hole are internal threads,
Resolver position adjustment structure. A resolver position adjusting structure according to claim 1 or 2,
The penetrating direction of the first hole and the penetrating direction of the second hole include a first hole axis that is a center axis of the first hole and a second hole axis that is the center axis of the second hole. , Is set so as to intersect on the radially outer side than the adjustment base portion,
Resolver position adjustment structure.

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