JP2016094113A - Steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components while securing water proofness.SOLUTION: A steering device 100 comprises a rotation angle sensor 32 which detects a rotation angle of a pinion shaft 22. The rotation angle sensor 32 comprises: a sensor case 50 which stores a detecting part 40; a connector 51 which holds a lead wire connected to the detecting part 40, is formed integrally with the sensor case 50 and inserted through an opening part 29c formed in a cover 29; an O ring 52 which seals a space between the connector 51 and the opening part 29c; and a fastening mechanism 60 for fastening the sensor case 50 to the cover 29. The fastening mechanism 60 comprises a bolt 63 which is inserted through a through-hole 61 formed in the sensor case 50 and fastened to a boss part 62 formed in the cover 29, and a spacer 65 which elastically supports the sensor case 50 between the boss part 62 and the bolt 63.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a steering device mounted on a vehicle.

  Patent Document 1 discloses a steering apparatus including a rotation angle detector that detects a rotation angle of a rotating member that rotates by a steering operation.

  The rotation angle detector described in Patent Document 1 includes a case that accommodates and supports a driven gear, a reduction gear, and a detection unit, a plurality of conductive wires connected to the detection unit, and a conductive wire that is attached to the case and is connected to the case. And a grommet fitted in a fitting hole formed in the housing. The detected rotation amount detected by the detection unit is output to the control unit through a conducting wire, and the control unit obtains the rotation angle of the drive gear that rotates integrally with the output shaft from the difference in rotation amount between the driven gear and the final reduction gear.

JP 2014-19264 A

  In the steering apparatus described in Patent Document 1, grommets are fitted and provided in the fitting holes of the housing through which the conductors are inserted, in order to ensure waterproofness at the portions where the conductors are drawn out of the housing. In addition, a connector for connection with the control unit is provided at the tip of the conducting wire.

  As described above, the steering device described in Patent Document 1 has a problem that the number of parts is large at a portion where the conducting wire is drawn out of the housing.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a steering device that can reduce the number of components while ensuring waterproofness.

  1st invention is a steering device provided with the rotation angle detector which detects the rotation angle of a rotating shaft, Comprising: A rotation angle detector hold | maintains the case which accommodates a detection part, and the conducting wire connected to the detection part. A connector that is formed integrally with the case and passes through the opening formed in the housing, an annular seal member that seals between the connector and the opening of the housing, and a fastening mechanism for fastening the case to the housing The fastening mechanism includes a through-hole formed in the case, a bolt inserted through the through-hole and fastened to a mounting portion formed in the housing, and the case elastically between the mounting portion and the bolt. And an elastic member to be supported.

  In the first invention, since the connector for holding the conductive wire connected to the board is formed integrally with the case, the number of parts is reduced. Further, since the case is elastically supported by the housing via the elastic member, the connector is aligned in the opening of the housing by the seal member. Therefore, waterproofness between the connector and the opening of the housing is ensured.

  The second invention is characterized in that the through hole extends in a direction perpendicular to the axial direction of the connector.

  In the second invention, since the compression direction of the elastic member and the compression direction of the seal member coincide with each other, the connector is easily aligned within the opening of the housing by the seal member.

  According to a third aspect of the present invention, the fastening mechanism further includes a cylindrical member that allows the bolt to pass through the hollow portion and the bolt to pass through the hollow portion, and the cylindrical member is formed with a height larger than the height of the through hole. The elastic member is sandwiched between the first mounting portion and the first elastic portion disposed in a compressed state between the mounting portion and the case, and is disposed in a compressed state between the head portion of the bolt and the case. And a second elastic part.

  According to a fourth aspect of the present invention, there is provided a male screw portion fastened to the mounting portion, and a cylindrical portion formed with a larger diameter than the screw portion so as to be able to contact the end surface of the mounting portion of the housing and through the through hole. And the cylindrical part of the bolt is formed such that its height is greater than the height of the through hole, and the elastic member is a first elastic part arranged in a compressed state between the attachment part and the case, And a second elastic portion disposed in a compressed state between the head of the bolt and the case.

  In the third and fourth inventions, predetermined gaps are ensured between the mounting portion and the case and between the bolt head and the case, respectively. And since an elastic member is arrange | positioned in the clearance gap in the clearance gap, a case will be supported via an elastic member between a volt | bolt and an attaching part. Therefore, since the connector integrated with the case is aligned in the opening of the housing by the seal member, waterproofness between the connector and the opening of the housing is ensured.

  The fifth invention is characterized in that the rigidity of the elastic member is smaller than the rigidity of the seal member.

  In the fifth invention, since the rigidity of the elastic member is smaller than the rigidity of the seal member, the elastic member does not hinder the aligning action of the connector by the biasing force of the seal member. Therefore, waterproofness between the connector and the opening of the housing is ensured.

  According to the present invention, it is possible to reduce the number of parts while ensuring waterproofness.

It is a lineblock diagram of a steering device concerning an embodiment of the present invention. It is a fragmentary sectional view of the assist mechanism in the steering device concerning an embodiment of the present invention. It is a disassembled perspective view of a rotation angle sensor. It is a disassembled perspective view of a cover and a rotation angle sensor. It is a top view of the state where the rotation angle sensor was fastened to the cover. It is a bottom view of the state where the rotation angle sensor was fastened to the cover. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which shows the modification of the steering device which concerns on embodiment of this invention.

  A steering device 100 according to an embodiment of the present invention will be described with reference to the drawings.

  First, the overall configuration of the steering device 100 will be described with reference to FIG. FIG. 1 is a configuration diagram of the steering device 100.

  The steering device 100 is a dual pinion type electric power steering device in which a steering force by a driver and an assist driving force by the electric motor 21 are independently input to the rack shaft 12.

  The steering device 100 includes a steering mechanism 10 that steers the vehicle wheel 2 according to the rotation of the steering wheel 1 to which a steering force is input by a driver, an assist mechanism 20 that assists the driver's steering force, And a control device 30 for controlling the assist amount.

  The steering mechanism 10 includes a steering shaft 11 that is coupled to the steering wheel 1 and rotates according to the rotation of the steering wheel 1, and a rack shaft 12 that steers the vehicle wheel 2 according to the rotation of the steering shaft 11. .

  The steering shaft 11 includes an input shaft 13 connected to the steering wheel 1, an output shaft 15 connected to the input shaft 13 via a torsion bar 14, and a first pinion 16 formed on the output shaft 15 and meshing with the rack shaft 12. And having.

  The assist mechanism 20 includes an electric motor 21 that is a power source of assist force, a pinion shaft 22 as a rotation shaft to which the driving force of the electric motor 21 is transmitted via the speed reduction mechanism 3, and a rack shaft formed on the pinion shaft 22. A second pinion 23 that meshes with the second pinion 23. The speed reduction mechanism 3 includes a worm shaft 3 a connected to the output shaft of the electric motor 21 and a worm wheel 3 b that meshes with the worm shaft 3 a and is connected to the pinion shaft 22.

  The control device 30 is a torque sensor 31 that detects the steering torque applied to the torsion bar 14 based on the relative rotation between the input shaft 13 and the output shaft 15, and a rotation angle detector that detects the rotation angle of the pinion shaft 22. Rotation angle sensor 32, steering angle sensor 34 that detects the steering angle that is the rotation angle of the steering wheel 1, motor rotation angle sensor 35 that is configured by a resolver and detects the rotation angle of the electric motor 21, and the electric motor 21 And a controller 33 for controlling the operation.

  The controller 33 controls the driving of the electric motor 21 based on the steering torque detected by the torque sensor 31 and the rotation angle detected by the motor rotation angle sensor 35. The controller 33 considers the steering angle detected by the steering angle sensor 34 and the rotation angle of the pinion shaft 22 detected by the rotation angle sensor 32 in addition to the steering torque and the rotation angle of the electric motor 21. The drive of 21 may be controlled.

  Further, if the rotation angle of the pinion shaft 22 detected by the rotation angle sensor 32 is used, the turning angle of the wheel 2 can be accurately grasped. Therefore, the detection result of the rotation angle sensor 32 indicates the side slip of the vehicle. It is used also in control of VDC (Vehicle Dynamics Control) etc. to suppress.

  Next, the assist mechanism 20 will be described in detail with reference to FIG. FIG. 2 is a partial cross-sectional view of the assist mechanism 20.

  The pinion shaft 22 is rotatably supported by a metal housing 26 via bearings 24 and 25. The pinion shaft 22 is supported by a sliding bearing 24 on the tip side, and supported by a rolling bearing 25 in the vicinity of the middle in the axial direction. The second pinion 23 that meshes with the rack shaft 12 is formed between the sliding bearing 24 and the rolling bearing 25 on the pinion shaft 22.

  A worm wheel 3b of the speed reduction mechanism 3 is connected to the pinion shaft 22 on the side opposite to the second pinion 23 with the rolling bearing 25 interposed therebetween. The driving force of the electric motor 21 is transmitted to the rack shaft 12 through the speed reduction mechanism 3 and the pinion shaft 22, and acts to assist the driver's steering force. Thus, the pinion shaft 22 rotates as the driver steers the steering wheel 1.

  The housing 26 includes a first housing 27 that houses the second pinion 23, a second housing 28 that houses the worm wheel 3b, and a cover that covers the head portion 22a of the pinion shaft 22 by closing the opening of the second housing 28. 29. A rotation angle sensor 32 that detects the rotation angle of the pinion shaft 22 is provided in the cover 29.

  Next, the rotation angle sensor 32 will be described in detail with reference to FIGS. 3 is an exploded perspective view of the rotation angle sensor 32, FIG. 4 is an exploded perspective view of the cover 29 and the rotation angle sensor 32, and FIG. 5 is a plan view of the rotation angle sensor 32 fastened to the cover 29. FIG. 6 is a bottom view of the state in which the rotation angle sensor 32 is fastened to the cover 29.

  As shown in FIGS. 3 and 4, the rotation angle sensor 32 includes a detection unit 40 that detects the rotation angle of the pinion shaft 22, a resin sensor case 50 that houses the detection unit 40, and the sensor case 50 mounted on the housing 26. A fastening mechanism 60 for fastening to the cover 29.

  As shown in FIG. 3, the detection unit 40 detects a center gear 41 that rotates integrally with the pinion shaft 22, two outer gears 42 and 43 that mesh with the center gear 41, and the rotation angles of the outer gears 42 and 43. And a substrate 44 for outputting a signal to the controller 33.

  The center gear 41 is rotatably supported by the sensor case 50 and is fixed to the head portion 22 a of the pinion shaft 22. On the outer periphery of the center gear 41, teeth 41a are formed over the entire periphery.

The outer gears 42 and 43 are rotatably supported by the sensor case 50. Teeth 42a and 43a that mesh with the teeth 41a of the center gear 41 are formed on the outer circumferences of the outer gears 42 and 43 over the entire circumference. The number of teeth 42a and 43a is different from each other.
A magnet (not shown) that rotates together with the outer gears 42, 43 is fixed to the outer gears 42, 43.

  The substrate 44 is provided with two sensor ICs (not shown) that are disposed in proximity to the two outer gears 42 and 43 and face the magnets of the outer gears 42 and 43 in a non-contact manner. The substrate 44 calculates the rotation angle of the center gear 41, that is, the rotation angle of the pinion shaft 22, based on the change in magnetic flux accompanying the rotation of the two outer gears 42 and 43. A conductive wire 45 (see FIG. 2) is connected to the substrate 44, and the calculation result calculated by the substrate 44 is transmitted to the controller 33 through the conductive wire 45.

  The sensor case 50 is integrally formed with a connector 51 that holds the conductive wire 45. The connector 51 is a waterproof male connector and is connected to a female connector (not shown) connected to the controller 33. The connector 51 is formed to protrude in the radial direction of the pinion shaft 22.

  As shown in FIGS. 4 to 6, the cover 29 is a cap-shaped member having a disk-shaped bottom portion 29 a and a cylindrical portion 29 b. The cylindrical portion 29b is formed with a circular opening 29c through which the connector 51 is inserted. The sensor case 50 is fastened to the cover 29 by the fastening mechanism 60 with the connector 51 inserted through the opening 29c. A flange portion 29e is formed on the outer peripheral surface of the cylindrical portion 29b of the cover 29, and the cover 29 is fastened to the second housing 28 (see FIG. 2) via the flange portion 29e.

  A space between the connector 51 and the opening 29c of the cover 29 is sealed by an O-ring 52 as a seal member, and water can be prevented from entering the cover 29. A cylindrical portion 54 to be inserted into the opening 29 c of the cover 29 is formed on the outer periphery of the connector 51. An annular groove 53 in which the O-ring 52 is mounted is formed on the outer peripheral surface of the cylindrical portion 54.

  The O-ring 52 is provided in a compressed state between the annular groove 53 and the annular inner peripheral surface 29d of the opening 29c. Thus, the inner peripheral surface 29d of the opening 29c functions as a seal surface. Hereinafter, the inner peripheral surface 29d of the opening 29c is also referred to as a seal surface 29d.

  Here, the amount of compression between the annular groove 53 of the connector 51 and the sealing surface 29d in the O-ring 52 is preferably uniform over the entire periphery from the viewpoint of sealing performance. However, when the sensor case 50 is firmly fixed to the cover 29 by the fastening mechanism 60, the compression amount of the O-ring 52 is not uniform over the entire circumference but is biased in a certain direction, and the sealing property May get worse.

  Therefore, in the present embodiment, the sensor case 50 is floatingly supported by the fastening mechanism 60 with respect to the cover 29.

  Hereinafter, the fastening mechanism 60 will be described in detail mainly with reference to FIGS. 4, 6, and 7. FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6 and is a cross-sectional view of the fastening mechanism 60.

  The fastening mechanism 60 includes a flange portion 69 formed in the sensor case 50, a through hole 61 formed so as to penetrate the flange portion 69, and a boss as an attachment portion formed so as to protrude from the inner surface of the bottom portion 29 a of the cover 29. Part 62, bolt 63 inserted through through-hole 61 and fastened to boss part 62, bush 64 as a cylindrical member through which through-hole 61 is inserted and bolt 63 passes through the hollow part, boss part 62 and bolt And a spacer 65 as an elastic member that elastically supports the sensor case 50 between 63. In the present embodiment, there are two fastening mechanisms 60. Specifically, as shown in FIG. 6, a pair of fastening mechanisms 60 are provided symmetrically across the central axis of the connector 51.

  As shown in FIG. 7, the through hole 61 of the flange portion 69 is formed so as to extend in a direction perpendicular to the axial direction of the connector 51. That is, it is formed to extend in parallel with the pinion shaft 22.

  Similarly, the boss portion 62 is formed to extend in a direction perpendicular to the axial direction of the connector 51. A female thread portion 62 a is formed on the inner peripheral surface of the hollow portion of the boss portion 62.

  The bolt 63 is formed to have a larger diameter than the male screw portion 63a screwed into the female screw portion 62a of the boss portion 62, the cylindrical portion 63b inserted through the hollow portion of the bush 64, and the male screw portion 63a and the cylindrical portion 63b. And a head portion 63c to which a fastening tool can be attached.

  The bush 64 is formed with a height greater than the height of the through hole 61 of the flange portion 69. Therefore, when the bush 64 is inserted through the through hole 61, a part of the bush 64 protrudes from the through hole 61.

  In a state where the bolt 63 is inserted through the bush 64 and the screw portion 63 a is screwed into the female screw portion 62 a of the boss portion 62, the bush 64 is between the head portion 63 c of the bolt 63 and the end surface 62 b of the boss portion 62. It is pinched. Since a part of the bush 64 protrudes from the through hole 61 of the flange portion 69, the sensor case 50 can move when the through hole 61 slides along the outer peripheral surface of the bush 64.

  Thus, the flange portion 69 of the sensor case 50 is disposed with a predetermined gap between the head portion 63c of the bolt 63 and the end surface 62b of the boss portion 62, and the elastic spacer 65 is compressed in the gap. It is arranged with. As a result, the sensor case 50 is elastically supported in a floating manner via the spacer 65 between the head 63c of the bolt 63 and the end surface 62b of the boss 62.

  The outer diameter of the cylindrical portion 63b of the bolt 63 and the inner diameter of the bush 64 are substantially the same, and the outer diameter of the bush 64 and the inner diameter of the through hole 61 of the flange portion 69 are substantially the same. Therefore, although the sensor case 50 is floatingly supported in the axial direction of the bolt 63, the movement of the bolt 63 in the radial direction is restricted.

  The spacer 65 has a rigidity smaller than that of the O-ring 52. In the present embodiment, the spacer 65 is made of rubber. However, the spacer 65 may be made of resin or metal as long as it is smaller than the rigidity of the O-ring 52.

  The spacer 65 includes a first spacer portion 66 as a first elastic portion disposed in a compressed state between the end surface 62b of the boss portion 62 and one end surface 69a of the flange portion 69, a head portion 63c of the bolt 63, and a flange portion. A second spacer portion 67 as a second elastic portion, and a connection portion 68 connecting the first spacer portion 66 and the second spacer portion 67.

  In each of the first spacer portion 66 and the second spacer portion 67, circular openings 66a and 67a through which the bushes 64 are inserted are formed.

  The thicknesses of the first spacer portion 66 and the second spacer portion 67 are set so that the sum of these thicknesses is larger than the protruding amount of the bush 64 protruding from the through hole 61. By setting in this way, the first spacer part 66 and the second spacer part 67 are arranged in a compressed state.

  The connecting portion 68 is for constituting the first spacer portion 66 and the second spacer portion 67 with one component, and is not an essential constitution. That is, you may make it comprise the 1st spacer part 66 and the 2nd spacer part 67 as another components.

  As shown in FIG. 7, a washer 71 and a spring washer 72 are stacked between the head 63 c of the bolt 63 and the end face of the bush 64. By providing the washer 71, the axial force of the bolt 63 can be stably applied to the second spacer portion 67. Further, by providing the spring washer 72, loosening of the bolt 63 can be prevented. However, the head 63c of the bolt 63 may be in direct contact with the second spacer portion 67 without providing the washer 71 and the spring washer 72.

  According to the above embodiment, there exists an effect shown below.

  A bush 64 is sandwiched between the head portion 63 c of the bolt 63 and the end surface 62 b of the boss portion 62, and the height of the bush 64 is formed to be greater than the height of the through hole 61 of the flange portion 69. Thereby, a predetermined gap is secured between the end surface 62b of the boss portion 62 and one end surface 69a of the flange portion 69 and between the head portion 63c of the bolt 63 and the other end surface 69b of the flange portion 69. . Since the elastic spacer 65 is disposed in the gap in a compressed state, the sensor case 50 is elastically interposed between the head 63c of the bolt 63 and the end surface 62b of the boss 62 via the spacer 65. It will be supported floating.

  Since the sensor case 50 is elastically supported by floating via the spacer 65, the connector 51 integrated with the sensor case 50 is aligned with the sealing surface 29d of the opening 29c of the cover 29 by the urging force of the O-ring 52. The Thereby, since the compression amount of the O-ring 52 becomes uniform over the entire circumference, the waterproof property between the connector 51 and the opening 29c of the cover 29 is ensured.

  Further, since the connector 51 that holds the conducting wire 45 connected to the substrate 44 is formed integrally with the sensor case 50, the number of parts is reduced.

  Therefore, according to the present embodiment, it is possible to reduce the number of components while ensuring waterproofness.

  Further, since the rigidity of the spacer 65 is smaller than the rigidity of the O-ring 52, the spacer 65 does not hinder the alignment operation of the connector 51 due to the urging force of the O-ring 52. That is, the spacer 65 is configured to allow the connector 51 to move by the urging force of the O-ring 52. Therefore, waterproofness between the connector 51 and the opening 29c of the cover 29 is ensured.

  Next, a modification of the above embodiment will be described with reference to FIG. FIG. 8 corresponds to FIG. 7 and is a cross-sectional view of the fastening mechanism 60.

  The bush 64 in the above embodiment may be eliminated, and the bolt 63 may be configured to have the function of the bush 64 as well. Specifically, the cylindrical portion 63 b of the bolt 63 that passes through the through hole 61 of the flange portion 69 is formed to have a larger diameter than the external thread portion 63 a so as to be able to contact the end surface 62 b of the boss portion 62. Further, the cylindrical portion 63 b is formed so that its height is larger than the height of the through hole 61 of the flange portion 69. Therefore, in a state where the cylindrical part 63 b is inserted through the through hole 61, a part of the cylindrical part 63 b protrudes from the through hole 61.

  The flange portion 69 of the sensor case 50 is disposed with a predetermined gap between the head portion 63c of the bolt 63 and the end face 62b of the boss portion 62, and an elastic spacer 65 is disposed in a compressed state in the gap. . Accordingly, the sensor case 50 is elastically supported in a floating manner via the spacer 65 between the head 63c of the bolt 63 and the end surface 62b of the boss 62. Therefore, the same effect as the above-described embodiment can be obtained by this modification.

  Hereinafter, the configuration, operation, and effect of the embodiment of the present invention will be described together.

  In the present embodiment, the steering device 100 rotates with the steering of the steering wheel 1, the pinion shaft 22 that is rotatably supported by the housing 26, the rotation angle sensor 32 that detects the rotation angle of the pinion shaft 22, The rotation angle sensor 32 includes a detection unit 40 that detects the rotation angle of the pinion shaft 22, a sensor case 50 that houses the detection unit 40, and a lead wire 45 that is connected to the detection unit 40. , A connector 51 that is inserted through an opening 29c formed in the cover 29 of the housing 26, an annular O-ring 52 that seals between the connector 51 and the opening 29c of the cover 29, and a sensor case 50. A fastening mechanism 60 for fastening the cover 29 to the cover 29, and the fastening mechanism 60 is formed through the sensor case 50. 61, a bolt 63 inserted through the through hole 61 and fastened to a boss portion 62 formed in the cover 29, and a spacer 65 elastically supporting the sensor case 50 between the boss portion 62 and the bolt 63. Prepare.

  In this configuration, since the connector 51 that holds the conductive wire 45 connected to the substrate 44 is formed integrally with the sensor case 50, the number of components is reduced. Since the sensor case 50 is elastically supported by the cover 29 via the spacer 65, the connector 51 is aligned in the opening 29 c of the cover 29 by the O-ring 52. Therefore, waterproofness between the connector 51 and the opening 29c of the cover 29 is ensured.

  In the present embodiment, the through hole 61 extends in a direction perpendicular to the axial direction of the connector 51.

  In this configuration, since the compression direction of the spacer 65 and the compression direction of the O-ring 52 match, the connector 51 is easily aligned in the opening 29 c of the cover 29 by the O-ring 52.

  Further, in the present embodiment, the fastening mechanism 60 further includes a bush 64 through which the through hole 61 is inserted and the bolt 63 is inserted through the hollow portion, and the bush 64 is formed with a height larger than the height of the through hole 61. The spacer 65 is sandwiched between the bolt 63 and the boss portion 62, and the spacer 65 includes a first spacer portion 66 disposed in a compressed state between the boss portion 62 and the sensor case 50, and a head portion 63 c of the bolt 63. And a second spacer portion 67 disposed in a compressed state between the sensor case 50 and the sensor case 50.

  Further, in the modification of the present embodiment, the bolt 63 is formed to have a larger diameter than the threaded portion 63 a so that the threaded portion 63 a fastened to the bossed portion 62 and the end surface of the bossed portion 62 can be contacted. A cylindrical portion 63b that is inserted through the through hole 61. The cylindrical portion 63b of the bolt 63 is formed with a height larger than the height of the through hole 61. The spacer 65 includes the boss portion 62, the sensor case 50, and the like. And a second spacer portion 67 disposed in a compressed state between the head 63c of the bolt 63 and the sensor case 50.

  In these configurations, predetermined gaps are secured between the boss portion 62 and the sensor case 50 and between the head 63c of the bolt 63 and the sensor case 50, respectively. And since the spacer 65 is arrange | positioned in the clearance gap in the clearance gap, the sensor case 50 will be supported via the spacer 65 between the volt | bolt 63 and the boss | hub part 62. FIG. Therefore, since the connector 51 integrated with the sensor case 50 is aligned in the opening 29c of the cover 29 by the O-ring 52, waterproofness between the connector 51 and the opening 29c of the cover 29 is ensured.

  In the present embodiment, the rigidity of the spacer 65 is smaller than the rigidity of the O-ring 52.

  In this configuration, since the rigidity of the spacer 65 is smaller than the rigidity of the O-ring 52, the spacer 65 does not hinder the aligning action of the connector 51 due to the urging force of the O-ring 52. Therefore, waterproofness between the connector 51 and the opening 29c of the cover 29 is ensured.

  The embodiment of the present invention has been described above. However, the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

  For example, in the above-described embodiment, the case where the rotation angle sensor 32 detects the rotation angle of the pinion shaft 22 that is not connected to the steering wheel 1 in the dual pinion type steering device 100 is illustrated. However, instead of this, in the single-pinion type steering device, the rotation angle of the steering shaft connected to the steering wheel 1 may be detected by the rotation angle sensor 32. In this case, the sensor case 50 of the rotation angle sensor 32 is fastened via a fastening mechanism 60 to a housing that supports the steering shaft on the rotary shaft.

  Moreover, in the said embodiment, the case where the steering device 100 was an electric power steering device which assists the steering force of a driver with the electric motor 21 was illustrated. However, instead of this, in the steering device that assists the steering force of the driver by hydraulic pressure, the rotation angle of the steering shaft connected to the steering wheel 1 may be detected by the rotation angle sensor 32.

  As described above, the rotation angle sensor 32 may be any sensor that detects the rotation angle of the rotating shaft that rotates as the steering wheel 1 is steered, and the configuration of the steering device is not limited.

  In the above embodiment, the case where the sensor case 50 is fastened to the cover 29 by the two fastening mechanisms 60 is illustrated. However, the number of fastening mechanisms 60 is not limited to two, and may be only one, or three or more.

  Moreover, in the said embodiment, the case where the through-hole 61 of the flange part 69 was formed so that it might extend in the orthogonal | vertical direction with respect to the axial direction of the connector 51 was illustrated. However, the direction in which the through hole 61 is formed is not limited to the direction perpendicular to the axial direction of the connector 51, and may not be the same as the axial direction of the connector 51. That is, the through-hole 61 should just be formed inclining with respect to the axial direction of the connector 51, and the inclination angle can be set arbitrarily. However, if the through-hole 61 is formed so as to extend in the direction perpendicular to the axial direction of the connector 51, the compression direction of the spacer 65 and the compression direction of the O-ring 52 coincide with each other. It is easy to align in the part 29c. Therefore, it is preferable to form the through hole 61 so as to extend in a direction perpendicular to the axial direction of the connector 51.

DESCRIPTION OF SYMBOLS 100 ... Steering device, 1 ... Steering wheel, 11 ... Steering shaft, 22 ... Pinion shaft (rotary shaft), 29 ... Cover (housing), 29c ... Opening, 29d ..Inner peripheral surface, 32... Rotation angle sensor (rotation angle detector), 40... Detection unit, 44 .. substrate, 45. ... Connector, 52 ... O-ring (seal member), 60 ... Fastening mechanism, 61 ... Through hole, 62 ... Boss part (mounting part), 63 ... Bolt, 63a ... -Male thread part, 63b ... Cylindrical part, 63c ... Head, 64 ... Bush (cylindrical member), 65 ... Spacer (elastic member), 66 ... First spacer part (first Elastic part), 67... Second spacer part (second elastic part) 69 ... flange

Claims (5)

A rotating shaft that rotates with steering of the steering wheel and is rotatably supported by the housing,
A rotation angle detector for detecting a rotation angle of the rotation shaft,
The rotation angle detector is
A detection unit for detecting a rotation angle of the rotation shaft;
A case for accommodating the detection unit;
A connector that holds the conducting wire connected to the detection unit, is formed integrally with the case, and passes through an opening formed in the housing;
An annular seal member that seals between the connector and the opening of the housing;
A fastening mechanism for fastening the case to the housing;
The fastening mechanism is
A through hole formed in the case;
A bolt inserted through the through hole and fastened to a mounting portion formed in the housing;
A steering device comprising: an elastic member that elastically supports the case between the attachment portion and the bolt.   The steering device according to claim 1, wherein the through hole extends in a direction perpendicular to an axial direction of the connector. The fastening mechanism further includes a cylindrical member that is inserted through the through hole and through which the bolt is inserted through a hollow portion.
The cylindrical member is formed with a height greater than the height of the through hole, and is sandwiched between the bolt and the mounting portion of the housing,
The elastic member includes a first elastic portion disposed in a compressed state between the attachment portion and the case, and a second elastic portion disposed in a compressed state between the head of the bolt and the case. The steering apparatus according to claim 1, wherein the steering apparatus includes: The bolt is a male screw part fastened to the attachment part, and a cylindrical part that is formed in a larger diameter than the male screw part so as to be able to contact the end surface of the attachment part of the housing and is inserted through the through hole. And having
The cylindrical portion of the bolt is formed such that its height is greater than the height of the through hole,
The elastic member includes a first elastic portion disposed in a compressed state between the attachment portion and the case, and a second elastic portion disposed in a compressed state between the head of the bolt and the case. The steering apparatus according to claim 1, wherein the steering apparatus includes:   The steering apparatus according to any one of claims 1 to 4, wherein the rigidity of the elastic member is smaller than the rigidity of the seal member.

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