JP2005344845A - Rotation preventive structure of intermitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation preventive structure of an intermitting device capable of surely preventing a stationary side member of an intermitting device from rotating in the peripheral direction without requiring a weight increase. <P>SOLUTION: A cylindrical part 40 is arranged in the outer peripheral vicinity of an electromagnet 27, and is arranged in a position switch 31 for penetrating through a casing. A pair of sheet metals 41 and 42 are arranged to sandwich the cylindrical part 40 by projecting in the radial direction of the electromagnet 27, and are welded to the outer periphery of a core 26. Thus, when the electromagnet 27 is energized in the peripheral direction, rotation in the peripheral direction of the electromagnet 27 is checked by allowing one of the sheet metals 41 and 42 to abut on the cylindrical part 40 of the position switch 31. Since the position switch 31 is used in common for preventing rotation of the electromagnet 27, a separate rotation preventive member is not particularly required. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an anti-rotation structure for an intermittent device that performs intermittent switching of a power transmission path.

  As a conventional technique related to the rotation preventing structure of this type of interrupting device, for example, as described in Patent Document 1, there is an interrupting device that performs intermittent switching of a differential lock connecting portion of a differential device. As shown in FIG. 6, the interrupting device 1 has an annular attracting member that is connected to a differential lock coupling portion (not shown), and an annular electromagnet 2 that attracts the attracting member when energized. A mold 4 for the wiring 3 is extended, and a position switch 5 for detecting the state of the electromagnet 2 is disposed in the vicinity of the outer periphery of the electromagnet 1. In such an intermittent device, when the electromagnet 2 is energized from the wiring 3, the electromagnet 2 attracts the attracting member and engages with the position switch 5, so that the electromagnet 2 is in an operating state by the position switch 5. Can be detected.

Conventionally, as shown in FIGS. 7 and 8, a sheet metal 7 whose tip is engaged with an engagement groove 6 formed on the outer periphery of the electromagnet 2, and a bolt 9 for fastening the sheet metal 7 to a fixing member (bearing cap) 8. A structure for preventing rotation of the electromagnet 2 provided with the above has been proposed. In this conventional detent structure, the metal plate 7 is fastened to the fixing member 8 via the bolt 9, and the tip of the metal plate 7 is engaged with the engagement groove 6 formed on the outer periphery of the electromagnet 2. Thus, it is possible to prevent the electromagnet 2 from rotating in the circumferential direction. Thereby, damage to the wiring 3 can be prevented.
JP-A-2-286944 (pages 2 and 3, FIG. 1)

  However, in the prior art described in Patent Document 1, when the rotational force in the direction indicated by the arrow in FIG. 8 (that is, the circumferential direction of the electromagnet 2) is applied to the sheet metal 7 by the rotation of the electromagnet 2, the strength of the sheet metal 7 is increased. It was necessary to fully consider. Further, it is necessary to consider a sufficient tightening force so that the bolt 9 does not loosen due to vibration transmitted through the sheet metal 7.

  The present invention has been made in consideration of the above-described prior art, and its object is to reliably prevent the stationary side member of the interrupting device from rotating in the circumferential direction without requiring an increase in weight. An object of the present invention is to provide a detent structure for an intermittent device.

  In order to achieve the above object, the invention according to claim 1 is configured such that a detection member that penetrates the fixed wall and detects the state of the interrupting device is engaged with the stationary member of the interrupting device. is there.

  In the invention according to claim 1 configured as described above, when the stationary side member of the interrupting device is biased in the circumferential direction, the stationary side member is rotated in the circumferential direction by the detection member engaged with the stationary side member. And the reaction force at that time is received by the fixed member to which the detection member is fixed. As a result, the stationary side member can be reliably prevented from rotating in the circumferential direction, and the detection member for detecting the state of the intermittent device is also used as a detent for the stationary side member. There is no need and the weight is not increased.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, the stationary member is an electromagnet that biases the clutch member of the intermittent device, and the detection member is A position switch for detecting the operation of the clutch member.

  In the invention according to claim 2 configured as described above, when the electromagnet which is the stationary side member of the interrupting device is biased in the circumferential direction, the position switch engaged with the stationary side member causes the circumferential direction of the electromagnet. The rotation is prevented, and the reaction force at that time is received by a stationary member to which the position switch is fixed, for example, a casing. As a result, it is possible to reliably prevent the electromagnet from rotating in the circumferential direction, and the position switch that detects the operation of the clutch member of the interrupting device is also used as a detent for the electromagnet. No need to increase the weight.

  In addition, when the electromagnet and the position switch are attached, the degree of freedom in arrangement is improved by engaging with each other instead of considering interference in the arrangement.

  According to a third aspect of the present invention, in the second aspect of the present invention, a force in the circumferential direction of the electromagnet is applied to the position switch, and a force in the radial direction of the electromagnet is not applied. .

  In the invention according to claim 3 configured as described above, since the circumferential force of the electromagnet is applied to the position switch when the electromagnet rotates in the circumferential direction, the rotation of the electromagnet in the circumferential direction is performed by the position switch. Can be blocked.

  The invention according to claim 4 is the invention according to claim 3, wherein the position switch is provided with a cylindrical portion disposed in the vicinity of the outer periphery of the electromagnet, and the radial direction of the electromagnet is provided on the outer periphery of the electromagnet. A protrusion is provided so as to protrude toward the tube portion and face the cylindrical portion. For example, in the invention described in claim 5, the protrusion is constituted by a sheet metal welded to the outer periphery of the core of the electromagnet, and in the invention described in claim 6, the protrusion is provided integrally with the core of the electromagnet, In the seventh aspect of the present invention, the electromagnet coil is molded integrally with the coil mold.

  In the invention according to claims 4 to 7 configured as described above, when the electromagnet is urged in the circumferential direction, the projection protruding in the radial direction from the outer circumference of the electromagnet is connected to the cylindrical portion of the position switch. Engagement can prevent the electromagnet from rotating in the circumferential direction.

  According to an eighth aspect of the present invention, in the invention of the second aspect, in the position switch and the outer periphery of the electromagnet, a convex portion is formed on one side, and a concave portion formed on the other side is engaged. It is made the structure made to do.

  In the invention according to claim 8 configured as described above, when the electromagnet is urged in the circumferential direction, the protrusion protruding from the cylindrical portion of the position switch is applied to the end of the notch provided on the outer periphery of the electromagnet. By contacting, the electromagnet can be prevented from rotating in the circumferential direction.

  In the present invention, it is possible to reliably prevent the stationary side member of the interrupting device from rotating in the circumferential direction without requiring an increase in weight by using a non-rotating member different from the detection member. In addition, there is an effect that an anti-rotation structure for an interrupting device having excellent reliability with respect to prevention of breakage of the wiring connected to the stationary member and the connection connector can be obtained.

  Hereinafter, the details of the detent structure of the interrupting device according to the embodiment of the present invention will be described with reference to the drawings.

  (First Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention. In FIG. 2, the same components as those shown in FIG. 6 described above are denoted by the same reference numerals. That is, 3 is a wiring, and 4 is an extension of a mold that wraps the wiring.

  As an embodiment of an intermittent device for transmitting power, a differential device 10 shown in FIG. 1 includes a casing (a differential carrier) 11 as a stationary member that forms an outer shell, and bearings 12 and 13 on the casing 11. A differential case 14 that is rotatably supported and that transmits power from a propeller shaft (not shown) that extends in the longitudinal direction of the vehicle (the vertical direction in FIG. 1), and a differential gear set 15 provided in the differential case 14 are provided. The interrupting device 16 according to the first embodiment is arranged on the right side of the dynamic gear set 15. The differential case 14 is provided with a ring gear (not shown) having an axial center disposed in the left-right direction of the vehicle (left-right direction in FIG. 1). A drive pinion gear interlocked with the propeller shaft meshes with the ring gear, thereby rotating from the engine. The driving force is transmitted to the differential case 14.

  The differential gear set 15 is supported so as to rotate integrally with the differential case 14 and extends in the vehicle front-rear direction, a pinion gear 18 rotatably supported on the pinion shaft 17, and both sides of the pinion gear 18. And a pair of side gears (output gears) 19 and 20 that mesh with the pinion gear 18 respectively. An axle shaft (not shown) extending in the left direction of the vehicle (left side in FIG. 1) passes through the bearing portion 14 a formed at the left end of the differential case 14, and the front end of the axle shaft is splined to the left side gear 19. Similarly, another axle (not shown) extending in the right direction of the vehicle (the right side in FIG. 1) passes through the bearing portion 14b formed at the right end of the differential case 14, and the tip of this axle is splined to the right side gear 20. Are combined.

  The interrupting device 16 is arranged in the vicinity of the right side of the right side gear 20, and is arranged in the differential case 14 that is one side of the input / output member so as to be axially movable, and an annular clutch member 21 that interrupts power between the input / output members, A washer 22 and an urging member (spring) 23 interposed between the clutch member 21 and the right side gear 20 which is the other side of the input / output member, an annular pressure plate 24 engaged with the clutch member 21, and the pressure An annular electromagnet 27 consisting of a coil 25 and a core 26 surrounding the coil 25, interposed between the plate 24 and the casing 11, and inserted into the inner peripheral side of the annular electromagnet 27. When the coil 25 is energized, the left side of FIG. A cylindrical solenoid member 28 that is biased toward the inner surface of the solenoid member 28, and is fixed to the inner periphery of the solenoid member 28 after being formed separately. 1 is interposed between the inner periphery of the pressing member 29 and the outer periphery of the bearing portion 14b of the differential case 14, and is made of stainless steel or the like. A cylindrical support member 30 made of a nonmagnetic material and supporting the core 26 is provided, and a position switch 31 for detecting the axial movement operation of the clutch member 21 is provided. The pressure plate 24, the electromagnet 27, the solenoid member 28, the pressing member 29, and the support member 30 are disposed on the outer periphery of the bearing portion 14b of the differential case 14.

  A driven cam 20a is integrally formed on the back portion of the right side gear 20 (the right portion in FIG. 1). The clutch member 21 is disposed on the inner side of the differential case 14 and is integrally formed from a drive cam 21a that can be engaged with the driven cam 20a of the side gear 20 and a protruding portion 21b that penetrates the differential case 14 and partially protrudes outward. The projecting portion 21 b is engaged with the arm portion 24 a of the pressure plate 24.

  An opening 32 is formed between the inner periphery of the right end of the core 26 and the outer periphery of the right end of the support member 30, and another opening 33 is formed between the inner periphery of the left end of the core 26 and the outer periphery of the pressing member 29. Is formed.

  When the support member 30 is mounted on the outer periphery of the bearing portion 14b of the differential case 14, one end of the support member 30 is brought into contact with the positioning step portion 34 formed on the outer periphery of the bearing portion 14b. Positioning in the axial direction is performed. In addition, a positioning washer 35 is interposed between the other end of the support member 30 and the inner race of the bearing 13, so that the distance between the bearing 13 and the support member 30 is set. By positioning the support member 30 in this manner, the axial position of the core 26 supported by the support member 30 is determined with respect to the differential case 14. Further, by adjusting the relative positional relationship between the core 26 and the support member 30, the radial position of the core 26 with respect to the differential case 14 is also determined.

  The position switch 31 is formed on the outside of the casing 11, a switch body 36 formed at one end of the switch body 36, and screwed into the casing 11. The position switch 31 protrudes from the threaded part 37 to the inside of the casing 11. The switch rod 38 interlocked with the clutch member 20, the flange 39 provided at the tip of the switch rod 38 and engaging the pressure plate 24, and projecting from the screw portion 37 to the inside of the casing 11, It consists of a cylindrical portion 40 (having a function of preventing rotation as a convex portion) arranged in the vicinity of the outer periphery, and a switch rod 38 is inserted through the central portion of the cylindrical portion 40.

  In the above intermittent device 16, the clutch member 21 is always urged to the right side of FIG. 1 by the urging member 23, and therefore, when the coil 25 of the electromagnet 27 is not energized as shown in FIG. The drive cam 21a is kept away from the driven cam 20a of the side gear 20. As a result, the side gears 19 and 20 rotate independently of the differential case 14, that is, in a cut-off state where no power is transmitted from the differential case 14 to the side gears 19 and 20, the differential function of the side gears 19 and 20 is ensured. Yes.

  Next, when the coil 25 of the electromagnet 27 is energized, a magnetic circuit that circulates through the core 26 is formed, and the solenoid member 28 is biased to the left side in FIG. 1, so that the clutch member 21 is pressed by the pressing member 29 via the pressure plate 24. Is pressed to the left in FIG. 1 against the urging force of the urging member 23. As a result, the drive cam 21 a of the clutch member 21 meshes with the driven cam 20 a of the side gear 20, and the side gears 19 and 20 rotate integrally with the differential case 14. That is, since the power is transmitted from the differential case 14 to the side gears 19 and 20, the left and right axles are driven through the side gears 19 and 20. At this time, since the pressure plate 24 moves to the position indicated by the broken line in FIG. 1, the switch body 36 is urged to the left side in FIG. The operation of the member 21 is detected.

  Next, when the energized state of the coil 25 of the electromagnet 27 is released, there is no magnetic circuit circulating through the core 26, so that the clutch member 21 is urged to the right side in FIG. 29 and the solenoid member 28 are pushed back to their original positions shown in FIG. As a result, the drive cam 21a of the clutch member 21 is separated from the driven cam 20a of the side gear 20, and returns to a disconnected state in which power is not transmitted from the differential case 14 to the side gears 19 and 20. At this time, the pressure plate 24 returns to the position indicated by the solid line in FIG. 1, so that the flange portion 39 and the switch rod 38 of the position switch 31 also return to their original positions, and the operation detection of the clutch member 21 is finished.

  And in the detent structure of 1st Embodiment, as shown in FIG. 2, it arrange | positions on the outer periphery of the core 26 facing the circumferential direction so that it may protrude in the radial direction of the electromagnet 27 and the cylinder part 40 may be pinched | interposed. L-shaped metal plates 41 and 42 (having a detent function as a convex portion) as a pair of protrusions are welded together. The portion 50 sandwiched between the sheet metals 41 and 42 has a function of preventing rotation in both directions of rotation by abutting the cylindrical portion 40. For example, when the electromagnet 27 is urged clockwise about the axis in FIG. The one metal plate 41 welded to the outer periphery of the core 26 abuts on the cylindrical portion 40 of the position switch 31, so that the electromagnet 27 is prevented from rotating clockwise in FIG. It is received by the casing 11 through which 31 penetrates. Similarly, when the electromagnet 27 is urged counterclockwise in FIG. 2, the other sheet metal 42 attached to the outer periphery of the core 26 abuts on the cylindrical portion 40 of the position switch 31, so that the electromagnet 27 is counterclockwise in FIG. 2. Rotation in the clockwise direction is prevented, and the reaction force at that time is received by the casing 11 through which the position switch 31 passes.

  In the anti-rotation structure of the first embodiment configured as described above, the electromagnet 27 can be reliably prevented from rotating in the circumferential direction, and the position switch 31 is also used as an anti-rotation of the electromagnet 27. Therefore, a separate detent member is not particularly required and the weight is not increased.

  Further, in the detent structure of the first embodiment, since the L-shaped metal plates 41 and 42 are welded to the outer periphery of the core 26 as compared with the conventional structure in which the metal plates are attached with fastening bolts, the metal plates 41 and 42 are It is strong because it does not buckle or bend, and it does not lose its anti-rotation function due to vibrations, and in this respect as well, the electromagnet 27 can be reliably prevented from rotating in the circumferential direction.

  Further, in the anti-rotation structure of the first embodiment, the axial dimension of the support member 30 is set large and mounted on the outer periphery of the bearing portion 14b of the differential case 14, and the core 26 of the electromagnet 27 is supported by the support member 30. Can be prevented from tilting. As a result, when the solenoid member 28 and the pressing member 29 move in the axial direction, the sliding state with the inner peripheral surface of the core 26 and the outer peripheral surface of the support member 30 is maintained in a favorable state. The pressing member 29 can move smoothly in the axial direction. Furthermore, since the openings 32 and 33 are provided at the inner peripheral end of the core 26, the solenoid member 28 and the pressing member 29 can move in the axial direction more smoothly. The electromagnet 27 and the position switch 31 are not arranged so as not to interfere with each other as in the prior art. Instead, the electromagnet 27 and the position switch 31 are related to each other as a detent as a reverse idea. The restrictions on the arrangement position of the are greatly relaxed. In addition, it is possible to arrange them close to each other and to make them compact. First, the compactness is achieved by the proximity relationship between the electromagnet 27 and the position switch 31 in the radial direction.

  (Second Embodiment) FIG. 3 shows a second embodiment of the present invention. In FIG. 3, the same components as those shown in FIGS. 1 and 2 described above are denoted by the same reference numerals.

  In the anti-rotation structure of the second embodiment shown in FIG. 3, as compared with the first embodiment shown in FIGS. 1 and 2, the outer periphery of the core 26 protrudes in the radial direction of the electromagnet 27 so as to sandwich the cylindrical portion 40. The difference is that a pair of protrusions 43 and 44 (having a function of preventing rotation as a convex portion) are integrally provided, and the other configurations are basically the same.

  Even in the second embodiment, when the electromagnet 27 is urged in the circumferential direction, one of the pair of protrusions 43 and 44 protruding from the outer periphery of the core 26 is connected to the cylindrical portion 40 (as a convex portion) of the position switch 31. The electromagnet 27 is prevented from rotating in the circumferential direction. Further, as compared with the conventional one in which the metal plate is attached with the fastening bolt, the pair of protrusions 43 and 44 are integrally provided on the outer periphery of the core 26, so that the protrusions 43 and 44 are less likely to buckle or bend. Moreover, it is not necessary to loosen by vibration and impair the anti-rotation function. A portion 51 sandwiched between the protrusions 43 and 44 has a function of preventing rotation in both directions of rotation by contacting the cylindrical portion 40 as a recess.

  Even with the anti-rotation structure of the second embodiment configured as described above, the same effect as that of the first embodiment shown in FIGS. 1 and 2 can be obtained.

  (Third Embodiment) FIG. 4 shows a third embodiment of the present invention. In FIG. 4, the same components as those shown in FIGS.

  In the anti-rotation structure of the third embodiment shown in FIG. 4, compared with the first embodiment shown in FIGS. 1 and 2, the radial direction of the electromagnet 27 on the outer periphery of the mold of the coil 25 (that is, the synthetic resin coating portion). The pair of protrusions 45 and 46 arranged so as to protrude to the side of the cylindrical portion 40 are integrally molded, and the other configurations are basically the same.

  Even in the third embodiment, when the electromagnet 27 is biased in the circumferential direction, one of the pair of protrusions 45 and 46 integrally formed on the outer periphery of the coil 25 abuts on the cylindrical portion 40 of the position switch 31. The electromagnet 27 is prevented from rotating in the circumferential direction. Further, as compared with the conventional one in which the metal plate is attached with the fastening bolt, the pair of protrusions 45 and 46 are integrally formed on the outer periphery of the mold of the coil 25, so that the protrusions 45 and 46 are less likely to buckle or bend. Moreover, it is not necessary to loosen by vibration and impair the anti-rotation function. In addition, the part 52 located between each processus | protrusion 45,46 contact | abuts with the cylinder part 40 as a recessed part, and has a rotation prevention function to a rotation direction both directions.

  Even in the third embodiment configured as described above, the same effects as those of the first embodiment shown in FIGS. 1 and 2 can be obtained.

  (Fourth Embodiment) FIG. 5 shows a fourth embodiment of the present invention. In FIG. 5, the same components as those shown in FIGS.

  In the anti-rotation structure of the fourth embodiment shown in FIG. 5, a protrusion 47 that protrudes toward the outer periphery of the coil 25 is provided on the cylindrical portion 40 of the position switch 31 as compared with the first embodiment shown in FIGS. 1 and 2. This is different from the above in that a notch 48 that engages with the protrusion 47 is provided on the outer periphery of the core 26, and the other configurations are basically the same.

  Even in the rotation preventing structure of the fourth embodiment, when the electromagnet 27 rotates in the circumferential direction, the projection 47 (having a rotation preventing function as a convex portion) of the cylindrical portion 40 of the position switch 31 is provided on the outer periphery of the core 26. Since it contacts the end of the notch 48, the electromagnet 27 is prevented from rotating in the circumferential direction. In addition, the projection 47 provided on the cylindrical portion 40 of the position switch 31 is less likely to buckle or bend compared to the conventional one in which the metal plate is attached with the fastening bolt, and the fastening bolt is loosened by vibration and is prevented from rotating. There is no loss of functionality. The notch 48 serves as a recess and engages with the protrusion 47 and has a function of preventing rotation in both directions of rotation.

  Even in the fourth embodiment configured as described above, the same effects as those of the first embodiment shown in FIGS. 1 and 2 can be obtained.

  In the above embodiment, the position switch 31 constitutes a detection member for detecting the state of the intermittent device 16, the casing 11 constitutes a fixed wall through which the detection member penetrates, and the electromagnet 27 engages with the detection member. A stationary side member is formed. However, the present invention is not limited to this, and may be configured by other detection members such as a non-contact proximity switch, a fixed wall, and a stationary member.

  The present invention is relatively inexpensive and has the effect of providing a reliable detent structure for an interrupting device with respect to preventing damage to wiring and connection connectors connected to stationary members. The present invention can also be applied to a vehicle interrupting device that performs transmission switching of transmission paths.

1 is a cross-sectional view of a differential device provided with a detent structure for an interrupting device according to a first embodiment of the present invention. FIG. 3 is a diagram for explaining a detent structure according to the first embodiment. It is a figure explaining the detent | locking structure of the intermittent device which concerns on 2nd Embodiment of this invention. It is a figure explaining the detent | locking structure of the intermittent device which concerns on 3rd Embodiment of this invention. It is a figure explaining the detent | locking structure of the intermittent device which concerns on 4th Embodiment of this invention. It is a figure explaining the rotation stopping structure of the conventional intermittent device. It is sectional drawing of the detent | locking structure of the conventional intermittent device. It is a side view of the rotation stopper structure of the conventional intermittent device.

Explanation of symbols

3 Wiring 4 Mold 10 Differential device 11 Casing (fixed side wall)
14 Differential case 15 Differential gear set 16 Intermittent device 19, 20 Side gear 20a Driven cam 21 Clutch member 21a Drive cam 22 Washer 23 Biasing member 24 Pressure plate 25 Coil 26 Core 27 Electromagnet (stationary side member)
28 Solenoid member 29 Press member 30 Support member 31 Position switch (detection member)
36 Switch body 37 Threaded portion 38 Switch rod 39 Collar portion 40 Tube portion 41, 42 Sheet metal (projection) (convex portion)
43, 44 Projection (convex)
45, 46 Protrusion (convex)
47 Protrusions (convex parts)
48 Notch (recess)
50, 51, 52, 53 Recess

Claims (8)

  The interrupting device (16) characterized in that a detection member that penetrates the fixed wall (11) and detects the state of the interrupting device (16) is engaged with a stationary member of the interrupting device (16). Non-rotating structure.   The stationary member is an electromagnet (27) that biases the clutch member (21) of the interrupting device (16), and the detection member is a position switch (31) that detects the operation of the clutch member (21). The detent structure of the interrupting device (16) according to claim 1, wherein the detent device (16) is provided with a detent.   The intermittent force according to claim 2, wherein a circumferential force of the electromagnet (27) is applied to the position switch (31) and a radial force of the electromagnet (27) is not applied. Detent structure of device (16).   The position switch (31) is provided with a cylindrical portion (40) disposed in the vicinity of the outer periphery of the electromagnet (27), and protrudes in the radial direction of the electromagnet (27) on the outer periphery of the electromagnet (27). The structure for preventing rotation of the interrupting device (16) according to claim 3, characterized in that a protrusion disposed opposite the portion (40) is provided.   The interrupting device (16) according to claim 4, wherein the pair of protrusions comprises a pair of sheet metal (41, 42) welded to the outer periphery of the core (26) of the electromagnet (27). Non-rotating structure.   The detent structure of the intermittent device (16) according to claim 4, wherein the pair of protrusions (43, 44) are provided integrally with the core (26) of the electromagnet (27).   The detent structure of the intermittent device (16) according to claim 4, wherein the pair of protrusions (45, 46) are integrally formed with a mold of the coil (25) of the electromagnet (27). A protrusion (47) is formed on one side and engaged with a recess (48) formed on the other side of the position switch (31) and the outer periphery of the electromagnet (27). Item 3. A detent structure for the intermittent device (16) according to item 2.

Images