Temperature sensor holder and temperature sensor mounting method

Abstract

Disclosed is a temperature sensor holder that comprises a sensor holding part 71 that holds a temperature sensor 60, a holder engagement part 73 that is to be engaged by an object 30, and an arm 72 that has a curved part 72c that links the sensor holding part 71 and the holder engagement part 73. The temperature sensor holder thereby makes it possible to easily attach the temperature sensor without damaging the object to which the temperature sensor is attached, etc. Also disclosed is a temperature sensor attachment method that involves using the elastic force of the curved part 72c of the arm 72 of the temperature sensor holder 70 to make the holder engagement part 73 engage an insulator 33 while the sensor holding part 71 presses the temperature sensor 60 onto a stator coil 34 and thereby attaching the temperature sensor holder 70 to the insulator 33. The temperature sensor attachment method thereby makes it possible to easily attach the temperature sensor 60 to a motor 30 without damaging the motor 30.

Description

[Technical Field]

[0001] The present invention relates to a temperature sensor holder that holds a temperature sensor and a temperature sensor mounting method for mounting a temperature sensor using the temperature sensor holder. [Background technology]

[0002] Patent Document 1 discloses a structure in which a temperature sensor that detects the temperature of a stator coil is attached to a motor via a temperature sensor holder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent No. 6484334

[0004] The temperature sensor holder disclosed in Patent Document 1 has a holder fixing portion and a sensor holding portion formed integrally with the holder fixing portion, the holder fixing portion has two claws that clamp the flange portion of the insulator, and the sensor holding portion has a storage groove that stores the temperature sensor and a sensor pressing portion with a cantilever structure within the storage groove.

[0005] The temperature sensor holder is attached to the insulator by fitting its two claws into a flange portion of the insulator that protrudes in the rotor axis direction from the direction of the rotor axis (the motor's rotation drive shaft), so that the two claws clamp the flange portion. At this time, the temperature sensor stored in the storage groove is held in place by the temperature measuring portion being pressed against the stator coil by the spring force acting in the rotor rotation axis direction of the sensor pressing portion. The tip of the protruding flange of the insulator has a taper and a step at the bottom of the taper, and the claws of the holder fixing part fitted to the flange catch on the step, making it difficult to come off. Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, when removing the temperature sensor holder, it is necessary to bend the flange portion to remove the catch of the step at the tip of the flange portion of the insulator that was caught by the claw of the holder fixing portion of the temperature sensor holder, and displace the step of the flange portion.

[0007] The flange portion protruding in the rotor rotation axis direction of the insulator is a short protrusion, and stress is applied to the base end portion by bending, and the flange portion may be damaged. There are cases where only the temperature sensor is replaced during maintenance. However, if the flange portion of the insulator is damaged when removing the temperature sensor holder at that time, the entire motor will have to be replaced, which is inefficient.

[0008] The present invention has been made in view of such points, and the object thereof is to provide a temperature sensor holder and a temperature sensor mounting method capable of easily mounting a temperature sensor without damaging the object to be mounted or the like.

Means for Solving the Problems

[0009] In order to achieve the above object, the first invention provides A temperature sensor holder for attaching a temperature sensor that measures the temperature of a part to be measured to an object having the part to be measured, A sensor holding portion that holds the temperature sensor, A holder locking portion that is locked to the object, An arm having a curved portion that connects the sensor holding portion and the holder locking portion, and provides a temperature sensor holder characterized by comprising.

[0010] According to this configuration, due to the elastic force of the curved portion of the arm, when the holder locking portion is locked to the object, at the same time, the sensor holding portion presses the temperature sensor against the part to be measured, so that the temperature sensor holder can be attached to the object, and the temperature sensor is pressed against the part to be measured, so that the temperature of the part to be measured can be accurately measured. By elastically deforming the curved shape of the curved portion of the arm, the holder locking portion can be released from the object, and the temperature sensor holder can be easily removed from the object. When attaching and detaching the temperature sensor holder, the curved shape of the curved part of the arm is elastically deformed, so stress is dispersed without being concentrated, and the temperature sensor holder is not damaged, and the object is not damaged either.

[0011] The second invention is A temperature sensor mounting method for a motor including a stator configured in a ring shape by arranging a plurality of stator coils wound around a stator core via an insulator in the circumferential direction, and a rotor holding a magnet inside the stator and supported rotatably together with a rotary drive shaft, the method comprising: mounting a temperature sensor for detecting the temperature of the stator coil using the temperature sensor holder; The temperature sensor holder is attached to the insulator by the elastic force of the curved portion of the arm of the temperature sensor holder, and at the same time, the sensor holding portion presses the temperature sensor against the stator coil, thereby attaching the temperature sensor holder to the insulator.

[0012] With this configuration, the temperature sensor holder is attached to the motor insulator by the elastic force of the curved part of the arm, which causes the holder locking part to lock onto the insulator and the sensor holding part to press the temperature sensor against the stator coil.The load on the temperature sensor caused by vibration is absorbed by the elastic deformation of the curved part of the arm, and the sensor holding part can always maintain the temperature sensor pressed against the stator coil, allowing for stable temperature measurement of the stator coil.

[0013] By deforming the curved shape of the curved portion of the arm, the holder locking portion can be released from the insulator, and the temperature sensor holder can be easily removed from the insulator. By elastically deforming the curved shape of the arm's curved portion, the temperature sensor holder is attached and detached, so that stress is dispersed without concentrating on a part of the temperature sensor holder, and the temperature sensor holder is not damaged. Also, the motor's insulator does not deform and is not damaged.

[0014] In a preferred embodiment of the present invention, The holder locking portion is formed with protruding locking claws, The locking claws lock to the end of the insulator.

[0015] According to this configuration, since the protruding locking claws of the holder locking portion lock to the end of the insulator, the protruding locking claws lock in a state of being hooked on the end of the insulator, so that locking and unlocking of the locking claws are easy, that is, attachment and detachment of the temperature sensor holder are easy.

[0016] In a preferred embodiment of the present invention, The holder locking portion is formed with a protruding piece that protrudes in the same direction as the locking claws on the arm side of the locking claws, The locking claws lock to the end of the insulator located between the protruding piece.

[0017] According to this configuration, since the locking claws lock to the end of the insulator located between the protruding pieces protruding in the same direction, even if the curved portion of the arm bends so as to open due to the vibration of the motor, the protruding piece hits the end of the insulator and serves as a stopper, and the end of the insulator does not come out from between the protruding piece and the locking claws, and the temperature sensor holder is prevented from coming off the insulator.

[0018] In a preferred embodiment of the present invention, The temperature sensor holder has a pair of the arms extending from the sensor holding portion in opposite directions to each other, and a pair of the holder locking portions are respectively provided at the outer ends of the pair of the arms.

[0019] With this configuration, the elastic force of the curved portions of the arms on both sides of the sensor holding portion causes the central sensor holding portion to press the temperature sensor against the stator coil, allowing the temperature sensor to be pressed against the stator coil in a balanced and stable manner. Furthermore, when the temperature sensor holder is removed from the insulator, the curved portions of the arms on both sides are elastically deformed, so the amount of deformation of the curved portions of each arm is small, and the temperature sensor holder is not damaged.

[0020] In a preferred embodiment of the present invention, The locking claw of at least one of the pair of holder locking portions has an inclined surface that tapers toward the tip in a direction perpendicular to the protruding direction.

[0021] According to this configuration, the locking claw of at least one of the pair of holder locking portions has an inclined surface that tapers toward the tip in a direction perpendicular to its protruding direction, so that when the inclined surface of the locking claw is pressed against the end of the insulator, the curved portion of the arm elastically deforms, causing the end of the insulator to slide along the inclined surface of the locking claw, changing the position of the locking claw, and when the locking claw clears the end face of the insulator, the elastic restoring force of the curved portion of the arm allows it to be locked onto the end of the insulator. Therefore, the temperature sensor holder can be smoothly attached to the insulator.

[0022] In a preferred embodiment of the present invention, The insulator has a cylindrical portion interposed between the stator core and the stator coil, and a flange portion is formed along the stator coil at an open end on the radially outer side of the stator. The temperature sensor holder is attached to the flange portion from the radially outer side of the stator with the holder locking portion locked to an end of the flange portion.

[0023] According to this configuration, since the temperature sensor holder is attached to the end of the flange portion formed on the radially outer side of the stator of the insulator with the holder locking portion locked thereto, and is attached to the flange portion from the radially outer side of the stator, the temperature sensor holder does not get in the way when inserting the rotor inside the stator. Also, it is possible to prevent the temperature sensor holder from protruding axially beyond the stator coil.

[0024] In a preferred embodiment of the present invention, On the flange portion of the insulator, a positioning projection is formed that protrudes radially outward of the stator and restricts axial movement of the rotational drive shaft of the temperature sensor holder.

[0025] According to this configuration, since a positioning projection that protrudes radially outward of the stator and restricts axial movement of the rotational drive shaft of the temperature sensor holder is formed on the flange portion of the insulator, even if there is an axial impact or vibration on the rotational drive shaft of the motor, it is possible to prevent the temperature sensor holder from coming off.

[0026] In a preferred embodiment of the present invention, An opening is formed in the flange portion of the insulator through which the stator coil is exposed, When the temperature sensor holder is attached to the flange portion, the temperature sensor held by the sensor holding portion enters the opening and is pressed against the stator coil.

[0027] According to this configuration, since an opening through which the stator coil is exposed is formed in the flange portion of the insulator, and when the temperature sensor holder is attached to the flange portion, the temperature sensor held by the sensor holding portion enters the opening and is pressed against the stator coil, a simple and compact temperature sensor mounting structure can be achieved.

[0028] In a preferred embodiment of the present invention, The curved portion of the arm of the temperature sensor holder is curved so as to bulge radially outward of the stator, The temperature sensor held by the sensor holding portion is pressed against the stator coil by the elastic force of the curved portion of the arm, toward the inside in the radial direction of the stator.

[0029] With this configuration, the curved portion of the arm of the temperature sensor holder is curved so that it bulges radially outward from the stator, and the elastic force of the curved portion of the arm causes the temperature sensor held in the sensor holding portion to be pressed against the stator coil radially inward from the stator.Therefore, when the motor is subjected to radial vibrations of the stator, the elastic deformation of the curved portion of the arm, which is curved so that it bulges radially outward from the stator, allows the temperature sensor to always be pressed against the stator coil in response to the vibrations.

[0030] In a preferred embodiment of the present invention, The motor is mounted on the vehicle with the rotary drive shaft oriented horizontally.

[0031] With this configuration, the motor is mounted on the vehicle with its rotating drive shaft oriented horizontally, and the vertical vibrations that occur when the vehicle is moving are radial vibrations of the motor's stator. Therefore, the elastic deformation of the curved portion that bulges radially of the arm works effectively, allowing the temperature sensor to be constantly pressed against the stator coil in response to the vertical vibrations. [Effects of the Invention]

[0032] In the first invention, the elastic force of the curved part of the arm causes the holder locking part to lock onto the object, and at the same time the sensor holding part presses the temperature sensor against the part to be measured, thereby allowing the temperature sensor holder to be attached to the object.Since the temperature sensor is pressed against the part to be measured, the temperature of the part to be measured can be measured accurately. By elastically deforming the curved shape of the curved portion of the arm, the holder locking portion can be released from the object, and the temperature sensor holder can be easily removed from the object.

[0033] To attach and remove the temperature sensor holder, the curved shape of the curved portion of the arm is elastically deformed, so that stress is dispersed without concentration, the temperature sensor holder is not damaged, and the object is not damaged either.

[0034] In the second invention, the temperature sensor holder is attached to the insulator of the motor because, due to the elastic force of the curved portion of the arm, the holder locking portion locks to the insulator and at the same time the sensor holding portion presses the temperature sensor against the stator coil. The load on the temperature sensor due to vibration is absorbed by the elastic deformation of the curved portion of the arm, and the pressing of the temperature sensor against the stator coil by the sensor holding portion can always be maintained, and the temperature of the stator coil can always be measured stably.

[0035] By deforming the curved shape of the curved portion of the arm, the locking of the holder locking portion to the insulator can be released, and the temperature sensor holder can be easily removed from the insulator. By elastically deforming the curved shape of the curved portion of the arm, the temperature sensor holder is attached and removed, so that stress is dispersed without concentrating on a part of the temperature sensor holder, and the temperature sensor holder is not damaged. Also, the insulator of the motor is not deformed and is not damaged.

Brief Description of the Drawings

[0036]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiment for Carrying out the Invention

[0037] Hereinafter, an embodiment according to the present invention will be described with reference to FIGS. 1 to 9. FIG. 1 is a left side view of a motorcycle 1 which is a saddle-riding type vehicle according to an embodiment to which the present invention is applied. In the description of this specification, the directions of front, rear, left, and right shall follow the normal criteria with the straight-ahead direction of the motorcycle 1 according to this embodiment being the front. In the drawings, arrow FR indicates the front, arrow RR indicates the rear, arrow LH indicates the left, and arrow RH indicates the right.

[0038] This motorcycle 1 is a unit swing type motorcycle. Referring to FIG. 1, the vehicle body frame 2 of the motorcycle 1 includes a head pipe 3 that rotatably supports a front fork 10, a main frame 4 that extends rearward and downward from the head pipe 3, a pair of left and right down frames 5 that extend downward from the lower part of the head pipe 3, bend at the lower end, extend rearward, and then extend obliquely rearward and upward, and a pair of left and right seat rails 6 that extend obliquely rearward and upward from the middle part of the main frame 4. The rear end of the main frame 4 is connected to the lower part of the rear side portion 5r of the down frame 5 that extends obliquely rearward and upward, and the upper end of the rear side portion 5r is connected to the seat rail 6.

[0039] A back stay 7 connects the rear side portion 5r of the down frame 5 and the seat rail 6 to support the seat rail 6. A seat 8 is supported by the seat rail 6. A front wheel 11 is journalled at the lower end of a front fork 10 supported by the head pipe 3, and a steering handle 12 is provided at the upper end of the pivot of the front fork 10.

[0040] The front end of a swing frame 21, which is a support for a power unit 20, is connected to the lower part of the rear portion 5r of the down frame 5 via a link mechanism 15, and the power unit 20 can swing up and down integrally with the swing frame 21. A rear wheel 25 is pivotally supported at the rear end of the swing frame 21. A rear cushion 16 is interposed between a bracket 21 b protruding from the rear of the swing frame 21 and the seat rail 6 .

[0041] The swing frame 21 comprises a main arm 21M extending from in front of the rear wheel 25 toward the left side of the rear wheel 25, and a sub-arm (not shown) extending from the front right side of the main arm 21M toward the right side of the rear wheel 25. A stand 17 is provided at the bottom of the swing frame 21 so as to be able to rise and fall.

[0042] The main arm 21M has a motor 30 disposed on the left rear side and a power transmission mechanism 23 on the right side, and the rear axle 26 of the rear wheel 25 is supported at the rear end, forming a power unit 20 in which the rotation of the rotary drive shaft 45, which is the output shaft of the motor 30, is transmitted to the rear wheel 25 via the power transmission mechanism 23.

[0043] As shown in FIG. 3, a motor 30 is disposed at the rear in the left opening of the main arm 21M, which is long in the front-rear direction, with its rotary drive shaft 45 oriented in the vehicle width direction. The motor 30 is covered with a cylindrical motor cover 50 having a bottom from the axial outside (left side) of a rotary drive shaft 45, which is the motor output shaft.

[0044] The left opening of the main arm 21M, which is long in the front-rear direction, is covered by the arm cover 22 except for the motor cover 50. The arm cover 22 has an opening 22h formed in a portion corresponding to the cylindrical motor cover 50 with a bottom, and when the arm cover 22 is placed over the left opening of the main arm 21M, the motor cover 50 protrudes to the left from the opening 22h (see Figure 4).

[0045] 3 to 5, motor 30 is an inner rotor type AC motor. The rotor 41 is inserted inside the stator 31 which is configured in an annular shape. The stator 31 is a split core type, and is divided into multiple parts in the circumferential direction and arranged radially. A stator coil 34 is wound around each of the multiple stator cores 32 via a bobbin-shaped insulator 33 made of resin.

[0046] Therefore, the stator 31 is configured in an annular shape with a plurality of stator coils 34 arranged in the circumferential direction, each of which is wound around a radially arranged stator core 32. The stator core 32 has an outer arc-shaped end portion 32a that protrudes radially outward from the insulator 33 and forms an arc shape, and the outer arc-shaped end portions 32a of adjacent stator cores 32 are joined together to form an overall circular ring shape.

[0047] As shown in FIG. 4, the stator 31 is fixed to the main arm 21M by fastening the outer arc-shaped end 32a of the stator core 32 to the main arm 21M with a bolt 37. An outer arc-shaped end portion 32a of the stator core 32 formed in an annular shape is fastened to the main arm 21M at six points in the circumferential direction by bolts 37 (see FIG. 3).

[0048] A rotor 41 is provided at the center inside the annular stator 31, with a rotary drive shaft 45 as its central axis. Referring to Figure 4, the rotor 41 has an annular rotor core 43 fitted to the end of a rotary drive shaft 45 via a cylindrical boss portion 42, and magnets 44 are fitted into the rotor core 43 at intervals in the circumferential direction.

[0049] The rotary drive shaft 45 is rotatably supported by the main arm 21M in the left - right vehicle width direction, and serves as the input shaft of the power transmission mechanism 23 provided on the right side of the main arm 21M. A rotor 41 is fitted and fixed to a portion of the rotary drive shaft 45 protruding to the left side of the main arm 21M. Referring to FIG. 4, a male thread is formed at the left end of the rotary drive shaft 45, and a nut 46 that screws the cylindrical boss portion 42 of the fitted rotor 41 onto the male thread is tightened via a washer 47 to integrally fasten the rotor 41 to the rotary drive shaft 45.

[0050] Therefore, the rotation of the rotor 41 driven by the motor 30 rotates the rotary drive shaft 45 integrally. The rotation of the rotary drive shaft 45 is transmitted to the rear axle 26 via the power transmission mechanism 23 to rotate the rear wheel 25, and thus the motorcycle 1 travels.

[0051] The motor 30 is a three - phase AC motor. As shown in FIG. 3, three three - phase electric wires 35 extend forward along the left opening surface of the main arm 21M from the stator coils 34 of the stator 31. Although not shown, the inverter converts the DC power from the battery into three - phase AC power and supplies the three - phase AC power to the stator coils 34 of the motor 30 via the three - phase electric wires 35 to drive the motor 30.

[0052] The resin insulator 33 in the stator 31 of the motor 30 having the above - described structure has a bobbin shape. Referring to FIG. 4, it includes a cylindrical portion 33a interposed between the stator core 32 and the stator coil 34, and flange portions 33b and 33c respectively formed at both open ends of the cylindrical portion 33a. The flange portions 33b and 33c extend so that the open ends of the cylindrical portion 33a spread to the outer circumference and have a rectangular plate shape.

[0053] As shown in FIGS. 4 and 5, an outer flange portion 33b is formed at the radially outer open end of the cylindrical portion 33a directed in the radial direction (radial direction) of the stator 31, and an inner flange portion 33c is formed at the radially inner open end of the cylindrical portion 33a. The outer flange portion 33b of the insulator 33 contacts along the radially outer end of the stator coil 34 wound around the tubular portion 33a, and the inner flange portion 33c of the insulator 33 contacts along the radially inner end face of the stator coil 34 wound around the tubular portion 33a.

[0054] A temperature sensor holder 70 holding a temperature sensor 60 for detecting the temperature of the stator coil 34 is attached to the outer flange portion 33b of the insulator 33 provided on the two upper front and rear stator cores 32 among the multiple stator cores 32 arranged radially in the circumferential direction (see Figures 3 and 5).

[0055] The temperature sensor 60 has a sensor element built into a cylindrical sensor tube 61, and has a temperature measuring section 62 at one end of the sensor tube 61. The temperature sensor 60 is shown in the drawings of Figures 6-9 with a dotted pattern.

[0056] Referring to Figure 7, the temperature sensor holder 70 is made of resin and includes a sensor holding portion 71 that holds the temperature sensor 60, a pair of arms 72, 72 having curved portions 72c, 72c extending in opposite directions from the sensor holding portion 71, and a pair of holder locking portions 73, 73 provided on the opposing outer ends of the pair of arms 72, 72.

[0057] The sensor holding portion 71 has a pair of cylindrical gripping claws 71n, 71n that protrude symmetrically and face each other from a central base portion 71a, the pair having one circumferentially cut-out side. The central axis Lc of the cylindrical pair of gripping claws 71n, 71n is aligned with the central axis of the cylindrical sensor tube 61 of the temperature sensor 60, and the pair of gripping claws 71n, 71n grip the sensor tube 61 from both sides, thereby holding the temperature sensor 60. When the pair of gripping claws 71n, 71n grip the sensor tube 61, part of the cylindrical sensor tube 61 protrudes from between the tips of the pair of gripping claws 71n, 71n (see FIG. 9).

[0058] As shown in FIG. 7, a pair of arms 72, 72 extend symmetrically in opposite directions from a central base 71a at the base end of the pair of gripping claws 71n, 71n. In the temperature sensor holder 70, a connecting portion 75 extends from a central base portion 71a of the sensor holding portion 71 in the axial direction of the central axis Lc, and a box portion 76 is formed via the connecting portion 75.

[0059] As shown in Figure 7, the sensor tube 61 extends on both sides of the axial direction of the central axis Lc from the point where it is gripped by a pair of gripping claws 71n, 71n, and the end of the part extending along the connecting part 75 on the connecting part 75 side is inserted into the box part 76, and the temperature measuring part 62 is provided at the end of the part extending on the opposite side from the connecting part 75. Two signal wires 63 of the temperature sensor 60 extend from the end of the sensor tube 61 inserted into the box portion 76 and extend from inside the box portion 76 toward the connecting portion 75 .

[0060] A pair of arms 72, 72 extending in opposite directions from the central base 71a of the sensor holding portion 71 are strip-shaped plate portions having a constant width in the axial direction of the central axis Lc, and have curved portions 72c, 72c that are curved so as to bulge in a direction approximately opposite (the direction indicated by arrow Y in Figures 7 and 9) to the direction in which the gripping claws 71n, 71n protrude from the central base 71a (the direction indicated by arrow Z in Figures 7 and 9), and a pair of holder locking portions 73, 73 are provided at the opposing outer ends of the curved portions 72c, 72c.

[0061] A pair of locking claws 73n, 73n protrude toward each other from a pair of holder locking portions 73, 73 facing each other. The locking claw 73n of one of the pair of holder locking portions 73, 73 has an inclined surface 73s that tapers toward the tip in a direction perpendicular to the protruding direction. Further, the pair of holder locking portions 73, 73 are formed with protruding pieces 73p, 73p that protrude parallel to the locking claws 73n, 73n toward the arms 72, 72 from the locking claws 73n, 73n.

[0062] As shown in FIG. 6, the temperature sensor holder 70 is attached to the left end 33be of the rectangular plate-shaped outer flange portion 33b of the insulator 33. The outer flange portion 33b, which contacts the radially outer end of the stator coil 34 wound around the cylindrical portion 33a of the insulator 33, has a left end portion 33be which protrudes to the left of the radially outer end of the stator coil 34, and a temperature sensor holder 70 is attached to this protruding left end portion 33be.

[0063] As shown in FIG. 8, an opening 33bh is formed in the rectangular plate-shaped left end 33be of the outer flange portion 33b by cutting out from the center of the left edge to the right. The opening 33bh is formed to extend rightward to the point where the radially outer end of the stator coil 34 is exposed.

[0064] Furthermore, a left end 33be of the outer flange portion 33b is formed with two positioning projections, a left positioning projection 33bL and a right positioning projection 33bR, which project in the radial direction of the stator 31 on both sides of the opening 33bh. As shown in Figure 8, the left positioning protrusion 33bL protrudes along the left edge of the left end portion 33be to a position close to the opening 33bh, and the right positioning protrusion 33bR protrudes to the right of the left positioning protrusion 33bL by the width of the arm 72 of the temperature sensor holder 70 and to a position farther from the opening 33bh.

[0065] Left positioning protrusions 33bL, 33bL are formed at symmetrical positions on both sides of opening 33bh, and similarly, right positioning protrusions 33bR, 33bR are formed at symmetrical positions on both sides of opening 33bh. The left positioning protrusion 33bL and the right positioning protrusion 33bR position the temperature sensor holder 70 by sandwiching the arm 72 therebetween.

[0066] The temperature sensor holder 70 holding the temperature sensor 60 is attached to the left end 33be of the outer flange portion 33b of the insulator 33 from the radially outer side of the stator 31. Referring to Figure 8, first, the temperature sensor holder 70 is positioned radially outside the stator 31 relative to the left end 33be of the outer flange portion 33b, and one of the pair of locking claws 73n, 73n of the temperature sensor holder 70, which does not have an inclined surface 73s, is hooked onto one side of the left end 33be protruding to the left of the outer flange portion 33b. The side of the left end 33be of the outer flange portion 33b is located between the locking claw 73n and the protruding piece 73p.

[0067] Next, the temperature sensor holder 70, which is tilted relative to the outer flange portion 33b, is swung around the hook portion of one of the locking claws 73n that does not have an inclined surface 73s in a direction such that the other locking claw 73n that has an inclined surface 73s approaches the other side portion of the left end portion 33be.

[0068] As the temperature sensor holder 70 swings, the inclined surface 73s of the other locking claw 73n abuts and slides against the other side of the left end 33be of the outer flange portion 33b, and the curved portion 72c of the arm 72 elastically deforms to open, causing the locking claw 73n to be displaced in a direction away from the other side of the left end 33be of the outer flange portion 33b.

[0069] As the temperature sensor holder 70 swings, the inclined surface 73s of the other locking claw 73n slides against the other side of the left end 33be of the outer flange portion 33b, while the temperature sensor 60 gripped by the pair of gripping claws 71n, 71n of the central sensor holding portion 71 of the temperature sensor holder 70 enters the opening 73bh of the left end 33be of the outer flange portion 33b and is pressed against the stator coil 34 exposed by the opening 73bh.

[0070] After the temperature sensor 60 is pressed against the stator coil 34, further swinging the temperature sensor holder 70 causes the curved portion 72c of the arm 72 to elastically deform so as to open further, causing the other locking claw 73n to climb over the other side of the left end 33be of the outer flange portion 33b, and an elastic force acts in the direction of closing the open curved portion 72c of the arm 72, so that the other locking claw 73n locks onto the other side of the left end 33be of the outer flange portion 33b, as shown in Figure 9.

[0071] An elastic force acts on the pair of arms 72, 72 in the direction of closing their curved portions 72c, 72c, causing the pair of locking claws 73n, 73n to lock onto the side of the left end portion 33be, and at the same time, the central sensor holding portion 71 presses the temperature sensor 60 against the stator coil 34, thereby attaching the temperature sensor holder 70 to the left end portion 33be of the outer flange portion 33b of the insulator 33.

[0072] The curved portion 72c of the arm 72 of the temperature sensor holder 70 is curved so as to bulge radially outward from the stator 31 (in the direction indicated by arrow Y in Figure 9), and the direction in which the temperature sensor 60 held by the sensor holding portion 71 is pressed against the stator coil 34 by the elastic force of the curved portion 72c of the arm 72 is radially inward from the stator 31 (in the direction indicated by arrow Z in Figure 9). The temperature sensor 60 has a temperature measuring portion 62 at one end of a sensor tube 61 which is pressed against the stator coil 34 .

[0073] The arm 72 is sandwiched between two left-side positioning protrusions 33bL and right-side positioning protrusions 33bR that protrude radially from the stator 31 at the left end 33be of the outer flange portion 33b, and axial (left-right) movement of the rotating drive shaft 45 of the temperature sensor holder 70 is restricted. The left positioning protrusion 33bL is located on the base end side (towards the central base 71a) of the curved portion 72c of the arm 72, and the right positioning protrusion 33bR is located on the outer end side (towards the holder locking portion 73) of the curved portion 72c, and the left positioning protrusion 33bL and the right positioning protrusion 33bR are arranged to avoid the curved portion 72c of the arm 72, which elastically deforms, so that the axial positioning of the rotary drive shaft 45 is maintained even if the curved portion 72c of the arm 72 is deformed due to vibration.

[0074] As shown in FIG. 3, the motor 30 is mounted on the rear of the main arm 21M of the swing frame 21 with the rotary drive shaft 45 directed in the left and right vehicle width directions. In the motor 30 mounted in this position, the temperature sensor holder 70 is attached to the outer flange portions 33b, 33b of the insulators 33, 33 provided on the front and rear stator cores 32, 32 of the topmost stator core 32 among the multiple stator cores 32 divided and arranged in the circumferential direction of the stator 31 (see Figure 3).

[0075] The temperature sensor mounting structure according to the embodiment of the present invention described above in detail provides the following effects. 9, the temperature sensor holder 70 is attached to the outer flange 33b of the insulator 33 by the elastic force of the curved portion 72c of the arm 72, which causes the locking claws 73n of the holder locking portion 73 to lock onto the outer flange 33b of the insulator 33, and at the same time, the sensor holding portion 71 presses the temperature sensor 60 against the stator coil 34. The load on the temperature sensor 60 due to vibration is absorbed by the elastic deformation of the curved portion 72c of the arm 72, so that the sensor holding portion 71 can always maintain the temperature sensor 60 in pressure contact with the stator coil 34. Therefore, the temperature of the stator coil 34 can be measured stably at all times.

[0076] Also, referring to FIG. 8, the temperature sensor holder 70 attached to the outer flange portion 33b of the insulator 33 can remove the temperature sensor holder 70 from the outer flange portion 33b of the insulator 33 by deforming the curved shape of the curved portion 72c of the arm 72 to release the locking of the locking claw 73n of the holder locking portion 73 to the outer flange portion 33b of the insulator 33, and it is easy to remove the temperature sensor holder 70.

[0077] In addition, since the protruding locking claw 73n of the holder locking portion 73 locks to the end portion of the outer flange portion 33b of the insulator 33, the locking claw 73n locks in a state of being caught by the end portion of the outer flange portion 33b of the insulator 33, so that the locking and unlocking of the locking claw 73n are easy, that is, the attachment and detachment of the temperature sensor holder 70 are extremely easy.

[0078] To attach and detach the temperature sensor holder 70, the curved shape of the curved portion 72c of the arm 72 is deformed, so that the stress is dispersed without concentrating, and the temperature sensor holder 70 is not damaged. Also, there is no influence on the outer flange portion 33b of the insulator 33, and the insulator 33 is not deformed or damaged.

[0079] The temperature sensor holder 70 according to the present embodiment has a pair of arms 72 extending from the sensor holding portion 71 in opposite directions, and locking claws 73n of a pair of holder locking portions 73 are provided at the outer ends of the pair of arms 72, respectively. Therefore, referring to FIG. 9, due to the elastic forces of the curved portions 72c, 72c of the arms 72, 72 on both sides of the sensor holding portion 71, the central sensor holding portion 71 presses the temperature sensor 60 against the stator coil 34, so that the temperature sensor 60 can be stably pressed against the stator coil 34 in a well-balanced manner.

[0080] Also, referring to FIG. 8, when removing the temperature sensor holder 70 from the outer flange portion 33b of the insulator 33, the curved portions 72c, 72c of the arms 72 on both sides are elastically deformed. Therefore, the amount of deformation of the curved portion 72c of each arm 72 can be small, and the temperature sensor holder will not be damaged.

[0081] As shown in FIG. 9, a protruding piece 73p that protrudes in the same direction as the locking claw 73n is formed on the holder locking portion 73 on the side of the arm 72 from the locking claw 73n. The locking claw 73n locks to the end of the outer flange portion 33b of the insulator 33 located between the protruding piece 73p. Therefore, even if the arm 72 bends due to the vibration of the motor 30 such that the curved portion 72c opens, the protruding piece 73p hits the end of the outer flange portion 33b of the insulator 33 and serves as a stopper, preventing the end of the outer flange portion 33b of the insulator 33 from slipping out between the protruding piece 73p and the locking claw 73n, and preventing the temperature sensor holder 70 from coming off the outer flange portion 33b of the insulator 33.

[0082] Also, as shown in FIG. 8, when attaching the temperature sensor holder 70 to the outer flange portion 33b of the insulator 33, if one locking claw 73n without an inclined surface 73s is hooked on one side portion of the left end portion 33be protruding to the left of the outer flange portion 33b, since one side portion of the left end portion 33be of the outer flange portion 33b is located between the locking claw 73n and the protruding piece 73p, when the temperature sensor holder 70 is swung to lock the other locking claw 73n having the inclined surface 73s to the other side portion of the left end portion 33be of the outer flange portion 33b, the protruding piece 73p serves as a stopper, preventing the locked one locking claw 73n from slipping off the one side portion of the left end portion 33be of the outer flange portion 33b, and facilitating the attachment of the temperature sensor holder 70.

[0083] 8 and 9, the locking claw 73n of at least one of the pair of holder locking portions 73, 73 has an inclined surface 73s that tapers toward the tip in a direction perpendicular to the protruding direction. When the inclined surface 73s of the locking claw 73n is pressed against the end of the outer flange portion 33b of the insulator 33, the curved portion 72c of the arm 72 elastically deforms, and the end of the outer flange portion 33b slides along the inclined surface 73s of the locking claw 73n, changing the position of the locking claw 73n. When the locking claw 73n clears the end face of the outer flange portion 33b of the insulator 33, the elastic restoring force of the curved portion 72c of the arm 72 allows it to be locked onto the end of the outer flange portion 33b. Therefore, the temperature sensor holder 70 can be smoothly attached to the outer flange portion 33b of the insulator 33.

[0084] The insulator 33 has an outer flange portion 33b formed along the stator coil 34 at the open end of the cylindrical portion 33a, which is located between the stator core 32 and the stator coil 34 and is radially outward of the stator 31. As shown in FIG. 8, the temperature sensor holder 70 is attached to the outer flange portion 33b from the radially outside of the stator 31 by the locking claws 73n of the holder locking portion 73 locking onto the end of the outer flange portion 33b of the insulator 33. Therefore, when inserting the rotor 41 inside the stator 31, the temperature sensor holder 70 does not get in the way, making it easier to assemble the rotor 41. Furthermore, the temperature sensor holder 70 can be prevented from protruding from the stator coil 34 in the axial direction of the rotary drive shaft 45 .

[0085] Referring to Figure 9, the outer flange portion 33b of the insulator 33 is formed with a left positioning protrusion 33bL and a right positioning protrusion 33bR that protrude radially outward from the stator 31 and restrict axial movement of the rotation drive shaft 45 of the temperature sensor holder 70.Therefore, even if there is axial impact or vibration of the rotation drive shaft 45 of the motor 30, the temperature sensor holder 70 can be prevented from coming off the outer flange portion 33b.

[0086] Referring to FIG. 9, an opening 33bh through which the stator coil 34 is exposed is formed in the outer flange portion 33b of the insulator 33. When the temperature sensor holder 70 is attached to the outer flange portion 33b, the temperature sensor 60 held by the sensor holding portion 71 enters the opening 33bh and is pressed against the stator coil 34, so that a simple and compact temperature sensor mounting structure can be achieved.

[0087] Referring to FIG. 9, the curved portion 72c of the arm 72 of the temperature sensor holder 70 is curved so as to bulge outward in the radial direction of the stator 31. Due to the elastic force of the curved portion 72c of the arm 72, the direction in which the temperature sensor 60 held by the sensor holding portion 71 is pressed against the stator coil is the inner side in the radial direction of the stator 31 (the direction indicated by the arrow Z in FIG. 9). Therefore, even if the motor 30 receives radial vibration of the stator 31, due to the elastic deformation of the curved portion 72c that bulges outward in the radial direction of the stator 31 of the arm 72, the temperature sensor 60 can always be pressed against the stator coil 34 following the vibration.

[0088] Referring to FIG. 3, the motor 30 is mounted on the motorcycle 1 with the rotational drive shaft 45 directed in the left - right horizontal direction. Therefore, the vertical vibration of the motor 30 accompanying the running of the vehicle is the radial vibration of the stator 31 of the motor 30. Thus, the elastic deformation of the curved portion 72c that bulges in the radial direction of the arm 72 works effectively, and the temperature sensor 60 can always be pressed against the stator coil 34 following the vertical vibration, and the temperature of the stator coil 34 can always be measured stably.

[0089] As described above, the temperature sensor holder and the temperature sensor mounting method according to an embodiment of the present invention have been described. However, the aspect of the present invention is not limited to the above - described embodiment, and includes those implemented in various aspects within the scope of the gist of the present invention.

[0090] In this embodiment, the temperature sensor holder 70 has a pair of arms 72, 72 extending in opposite directions from the sensor holding portion 71, and a pair of holder locking portions 73, 73 at their outer ends.However, even in a temperature sensor holder having a single arm extending from the sensor holding portion and a single holder locking portion at its outer end, the elastic force of the curved portion of the arm attempting to close causes the holder locking portion to lock onto the motor insulator, and at the same time, the sensor holding portion presses the temperature sensor against the stator coil, allowing the temperature sensor holder to be attached to the motor. [Explanation of symbols]

[0091] 1...motorcycle, 2...body frame, 3...head pipe, 4...main frame, 5...down frame, 6...seat rail, 7...back stay, 8...seat, 10...front fork, 11...front wheel, 12...steering handle, 15...link mechanism, 16...rear cushion, 17...stand, 20...power unit, 21...swing frame, 21M...main arm, 21b...bracket, 22...arm cover, 23...power transmission mechanism, 25...rear wheel, 26...rear axle, 30...motor, 31...stator, 32...stator core, 32a...outer arc-shaped end portion, 33...insulator, 33a...cylindrical portion, 33b...outer flange portion, 33be...left end portion, 33bh...opening, 33bL...left positioning protrusion, 33bR...right positioning protrusion, 33c...inner flange portion, 34...stator coil, 35...three-phase electric wire, 37...bolt, 41... rotor, 42... cylindrical boss portion, 43... rotor core, 44... magnet, 45... rotation drive shaft, 46... nut, 47... washer, 50...Motor cover, 60... temperature sensor, 61... sensor tube, 62... temperature measuring part, 63... signal line, 70...Temperature sensor holder, 71...sensor holding portion, 71a...central base portion, 71n...gripping claws, 72...arm, 72c...curved portion, 73...holder locking portion, 73n...locking claws, 73s...inclined surface, 73p...projecting piece, 75...connecting portion, 76...box portion.

Claims

1. (Deleted)

2. A stator (31) in which a plurality of stator coils (34) wound around a stator core (32) via an insulator (33) are arranged in the circumferential direction to form an annular shape, and a magnet (44) is held inside the stator (31) and rotatably supported together with a rotary drive shaft (45). In the motor (30) comprising a rotor (41), A temperature sensor holder for attaching a temperature sensor (60) for measuring the temperature of the object to be measured (34) to an object (30) having the object to be measured (34), A sensor holding portion (71) for holding the temperature sensor (60), A holder locking portion (73) locked to the object (30), Using a temperature sensor holder including an arm (72) having a curved portion (72c) connecting the sensor holding portion (71) and the holder locking portion (73), In a temperature sensor mounting method for mounting a temperature sensor (60) for detecting the temperature of the stator coil (34), Due to the elastic force of the curved portion (72c) of the arm (72) of the temperature sensor holder (70), the holder locking portion (73) is locked to the insulator (33), and at the same time, the sensor holding portion (71) presses the temperature sensor (60) against the stator coil (34). The temperature sensor holder (70) is attached to the insulator (33), The insulator (33) has a flange portion (33b) formed along the stator coil at the open end on the radially outer side of the stator (31) of the cylindrical portion (33a) interposed between the stator core (32) and the stator coil (34), The temperature sensor holder (70) is characterized in that the holder locking portion (73) is locked to the end portion of the flange portion (33b) and is attached to the flange portion (33b) from the radially outer side of the stator (31). Temperature sensor mounting method.

3. A protruding locking claw (73n) is formed on the holder locking portion (73), The temperature sensor mounting method according to claim 2, wherein the locking claw (73n) is locked to the end portion of the insulator (33).

4. A protruding piece (73p) protruding in the same direction as the locking claw (73n) is formed on the holder locking portion (73) on the arm (72) side of the locking claw (73n), The temperature sensor mounting method according to claim 3, wherein the locking claw (73n) locks to an end of the insulator (33) positioned between the locking claw (73n) and the protruding piece (73p).

5. The temperature sensor mounting method according to claim 3 or claim 4, wherein a pair of the arms (72) extend from the sensor holding portion (71) of the temperature sensor holder (70) in opposite directions, and a pair of the holder locking portions (73) are respectively provided at outer ends of the pair of the arms (72).

6. The temperature sensor mounting method according to claim 5, wherein the locking claw (73n) of at least one of the pair of the holder locking portions (73) has an inclined surface (73s) that tapers toward a tip in a direction perpendicular to a protruding direction thereof.

7. (Deleted)

8. The temperature sensor mounting method according to claim 2, wherein positioning protrusions (33bL, 33bR) that protrude radially outside the stator (31) and restrict axial movement of the rotary drive shaft (45) of the temperature sensor holder (70) are formed on a flange portion (33b) of the insulator (33).

9. An opening (33bh) through which the stator coil (34) is exposed is formed in the flange portion (33b) of the insulator (33). The temperature sensor mounting method according to claim 2 or claim 8, wherein when the temperature sensor holder (70) is attached to the flange portion (33b), the temperature sensor (60) held by the sensor holding portion (71) enters the opening (33bh) and is pressed against the stator coil (34).

10. A curved portion (72c) of the arm (72) of the temperature sensor holder (70) is curved so as to bulge radially outside the stator (31). The temperature sensor mounting method according to any one of claims 2 to 6, claim 8, and claim 9, wherein a direction in which the temperature sensor (60) held by the sensor holding portion (71) is pressed against the stator coil (34) by an elastic force of the curved portion (72c) of the arm (72) is radially inside the stator (31).

11. The temperature sensor mounting method according to claim 10, wherein the motor (30) is mounted on a vehicle with the rotary drive shaft (45) directed in a horizontal direction.

12. A stator (31) in which a plurality of stator coils (34) wound around a stator core (32) via an insulator (33) are arranged in the circumferential direction to form an annular shape, and a rotor (41) that holds a magnet (44) inside the stator (31) and is rotatably supported together with a rotation drive shaft (45). A temperature sensor holder used to attach a temperature sensor (60) for detecting the temperature of the stator coil (34) to the motor (30), a sensor holding portion (71) for holding the temperature sensor (60); a holder locking portion (73) locked to the insulator (33); and an arm (72) having a curved portion (72c) connecting the sensor holding portion (71) and the holder locking portion (73). The insulator (33) has a flange portion (33b) formed along the stator coil at an open end on the radially outer side of the stator (31) of a cylindrical portion (33a) interposed between the stator core (32) and the stator coil (34). The arm (72) extends in a pair in opposite directions in the circumferential direction from the sensor holding portion (71). A pair of the holder locking portions (73) provided at both outer ends in the circumferential direction of the pair of arms (72) are locked to both ends in the circumferential direction of the flange portion (33b), and the temperature sensor holder is attached to the flange portion (33b) from the radially outer side of the stator (31).

13. The flange portion (33b) of the insulator (33) is formed with positioning protrusions (33bL, 33bR) that protrude radially outward of the stator (31) and restrict axial movement of the rotation drive shaft (45) of the temperature sensor holder (70). The temperature sensor holder according to claim 12, characterized in that.

14. An opening (33bh) through which the stator coil (34) is exposed is formed in the flange portion (33b) of the insulator (33). When the temperature sensor holder (70) is attached to the flange portion (33b), the temperature sensor (60) held by the sensor holding portion (71) enters the opening (33bh) and is pressed against the stator coil (34). The temperature sensor holder according to claim 12 or claim 13, characterized in that.

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