Vehicle door opening and closing device

Abstract

Provided is a vehicle door opening and closing device capable of improving the degree of freedom of the arrangement of a door drive device. The door opening / closing device is provided with a door drive device (50) that applies, to the link arm, a torque that rotates the link arm with respect to the vehicle body. The door drive device (50) is provided with: a drive drum (90) driven by a motor; a driven drum (100) disposed away from the driving drum (90); cables (171, 172) that are wound around the driving drum (90) and the driven drum (100) and transmit power from the driving drum (90) to the driven drum (100); and a transmission unit (190) that applies torque to the first link arm on the basis of power transmitted from the driven drum (100).

Description

Technical Field

[0001] This invention relates to a vehicle door opening and closing device. Background Technology

[0002] Patent Document 1 describes a vehicle door opening and closing device that connects a vehicle and a door. The vehicle door opening and closing device includes: a first link arm and a second link arm whose base end is rotatably connected to the vehicle body and whose top end is rotatably connected to the door; and a door drive device that applies power to the first link arm to perform an opening and closing action on the door.

[0003] The first and second linkage arms extend vertically relative to the rotation axis of the vehicle body, and also vertically relative to the rotation axis of the door. The vehicle body, door, first linkage arm, and second linkage arm constitute a four-link mechanism. The door drive mechanism applies a torque to the first linkage arm, causing it to rotate about its axis relative to the vehicle body. Furthermore, by rotating the first linkage arm, the door drive mechanism opens or closes the door.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent document 1: Japanese Patent Application Publication No. 2022-92327. Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] In the vehicle door opening and closing device described above, the door drive mechanism is mounted around the base end of the first linkage arm. Therefore, in such a vehicle door opening and closing device, it is desirable to increase the flexibility in the configuration of the door drive mechanism.

[0009] Technical means for solving technical problems

[0010] A vehicle door opening and closing device that solves the above-mentioned technical problems is applied to a vehicle having a body and a door, the body having a door opening portion through which the door opens and closes. The device comprises: a linkage arm, the base end of which is rotatably connected to the body, and the tip end of which is rotatably connected to the door; and a door drive device that applies a torque to the linkage arm to rotate it relative to the body, the door drive device comprising: a drive drum driven by an electric motor; a driven drum disposed away from the drive drum; a cable wound around the drive drum and the driven drum, transmitting power from the drive drum to the driven drum; and a transmission unit that applies the torque to the linkage arm based on the power transmitted from the driven drum.

[0011] The effects of the invention

[0012] Vehicle door opening and closing mechanisms can increase the flexibility of door drive configuration. Attached Figure Description

[0013] Figure 1 It is a perspective view showing the general structure of a vehicle equipped with door opening and closing devices.

[0014] Figure 2 It means Figure 1 A three-dimensional diagram of the general structure of the vehicle.

[0015] Figure 3 yes Figure 1 A side view of the vehicle.

[0016] Figure 4 yes Figure 1 A three-dimensional diagram of the door opening and closing mechanism.

[0017] Figure 5 yes Figure 1 A three-dimensional diagram of the door opening and closing mechanism.

[0018] Figure 6 yes Figure 1 An exploded perspective view of the door opening and closing mechanism.

[0019] Figure 7 yes Figure 1 An exploded perspective view of the door opening and closing mechanism.

[0020] Figure 8 yes Figure 1 An exploded perspective view of the door opening and closing mechanism.

[0021] Figure 9 yes Figure 1 An exploded perspective view of the driven drum of the door opening and closing device.

[0022] Figure 10 yes Figure 1 A cross-sectional view of the driven drum of the door opening and closing device.

[0023] Figure 11 yes Figure 10 It is a sectional view along line 11-11.

[0024] Figure 12 yes Figure 10 Sectional view along line 12-12.

[0025] Figure 13 Is it pulling out and Figure 1 A three-dimensional diagram of the structure related to the power transmission of the door opening and closing device.

[0026] Figure 14Is it pulling out and Figure 1 A three-dimensional diagram of the structure related to the power transmission of the door opening and closing device.

[0027] Figure 15 yes Figure 1 A partial top view of the door opening and closing device.

[0028] Figure 16 This is a perspective view of the door opening and closing device of the modified example.

[0029] Figure 17 yes Figure 16 Partial exploded perspective view of the door opening and closing device.

[0030] Figure 18 yes Figure 16 A partial top view of the door opening and closing device.

[0031] Symbol Explanation

[0032] 10…Vehicle; 20…Body; 21…Door opening; 30…Door; 40, 40X…Vehicle door opening and closing device; 41…First linkage arm; 42…Second linkage arm; 50, 50X…Door drive device; 60…Actuator; 61…Motor; 90…Drive drum; 100…Driven drum; 110…Main shaft; 120…First drum; 130…Second drum; 160…Spring (tensioner, force application component); 171…First cable; 172…Second cable; 190…Transmission part; R11…First drive direction; R12…Second drive direction; R21…First driven direction; R22…Second driven direction. Detailed Implementation

[0033] One embodiment of a vehicle equipped with a door opening and closing device (hereinafter referred to as "door opening and closing device") will be described.

[0034] <Structure of this embodiment>

[0035] like Figures 1-3 As shown, the vehicle 10 includes a body 20, a door 30, a door opening and closing device 40, and a control device 200.

[0036] In the following description, the width direction, the front-rear direction, and the vertical direction of the vehicle 10 will be referred to as the width direction, the front-rear direction, and the vertical direction, respectively. In the figure, the width direction is the extension of the X-axis, the front-rear direction is the extension of the Y-axis, and the vertical direction is the extension of the Z-axis. Furthermore, within the width direction, the direction towards the center of the vehicle 10 is referred to as the inward direction, and the direction away from the center of the vehicle 10 is referred to as the outward direction.

[0037] <Car Body 20>

[0038] The vehicle body 20 has a door opening 21. The door opening 21 is a side opening in the width direction of the vehicle body 20. The door opening 21 is the part through which a user passes when getting in and out of the vehicle relative to the rear seat of the vehicle 10. Although not shown in the figure, the vehicle body 20 preferably has a striker that restricts the door 30.

[0039] <Door 30>

[0040] The door 30 has a door body 31. The door body 31 has an inner panel 32 and an outer panel 33. The inner panel 32 and the outer panel 33 are panels corresponding to the shape of the door opening 21. The inner panel 32 is the portion of the door body 31 facing inward toward the vehicle 10, and the outer panel 33 is the portion of the door body 31 facing outward toward the vehicle 10. The inner panel 32 and the outer panel 33 are joined together by welding or the like.

[0041] <Door opening and closing device 40>

[0042] The door opening and closing device 40 includes a first linkage arm 41, a second linkage arm 42, a first body side bracket 43, a first door side bracket 44, a second body side bracket 45, and a second door side bracket 46. In addition, the door opening and closing device 40 includes two first support shafts 471 and 472, two second support shafts 481 and 482, and a door drive device 50.

[0043] <First link arm 41 and first brackets 43, 44>

[0044] The first linkage arm 41 defines the opening and closing trajectory of the door 30 and supports the weight of the door 30. Therefore, the bending stiffness of the first linkage arm 41 is higher than that of the second linkage arm 42. The first linkage arm 41 has an arm body 411, a base end connecting part 412, a top end connecting part 413, and an output gear 414.

[0045] The arm body 411 is rod-shaped. The arm body 411 constitutes most of the first linkage arm 41. The base-end connecting portion 412 constitutes the base end of the first linkage arm 41. The top-end connecting portion 413 constitutes the top end of the first linkage arm 41. The base-end connecting portion 412 and the top-end connecting portion 413 are columnar. The height direction of both the base-end connecting portion 412 and the top-end connecting portion 413 is vertical. The output gear 414 is a sector gear. The output gear 414 is fixed to the base-end connecting portion 412. The axis of the output gear 414 extends vertically. When the output gear 414 rotates, the arm body 411 rotates integrally with the output gear 414.

[0046] The first body side bracket 43 is constructed, for example, by joining multiple stamped metal sheets. The first body side bracket 43 supports a first support shaft 471. The axis of the first support shaft 471 extends vertically. The first body side bracket 43 supports the base end connection 412 of the first connecting arm 41 via the first support shaft 471, allowing it to rotate. At this time, the first support shaft 471 passes through the base end connection 412 of the first connecting arm 41 in the vertical direction. As a result, the first connecting arm 41 can rotate relative to the first body side bracket 43 about the axis of the first support shaft 471. Here, the axis of the first support shaft 471 coincides with the axis of the output gear 414. The first body side bracket 43 is fixed to the body 20 by fastening components. In this embodiment, the fastening components may be screws, bolts and nuts, or rivets.

[0047] The first door side bracket 44 is constructed, for example, by stamping a metal sheet. The first door side bracket 44 supports a first support shaft 472. The axis of the first support shaft 472 extends vertically. The first door side bracket 44 supports the top end connection 413 of the first linkage arm 41 via the first support shaft 472, allowing it to rotate. As a result, the first linkage arm 41 can rotate about the axis of the first support shaft 472 relative to the first door side bracket 44. The first door side bracket 44 is fixed to the door 30 by fastening components.

[0048] <Second link arm 42 and second brackets 45, 46>

[0049] The second linkage arm 42 is the arm that defines the opening and closing trajectory of the door 30. One end of the second linkage arm 42 along its long side is the base end, and the other end along its long side is the top end. The second linkage arm 42 can also be configured to adjust its length along its long side. In this case, the second linkage arm 42 is preferably subjected to a force in the contraction direction by a coil spring or the like.

[0050] The second body side bracket 45 is constructed, for example, by stamping a sheet metal. The second body side bracket 45 supports a second support shaft 481. The axis of the second support shaft 481 extends vertically. The second body side bracket 45 supports the base end of the second linkage arm 42 via the second support shaft 481, allowing it to rotate. As a result, the second linkage arm 42 can rotate relative to the second body side bracket 45 about the axis of the second support shaft 481. The second body side bracket 45 is fixed to the body 20 by fastening components.

[0051] The second door side bracket 46 is constructed, for example, by stamping a metal sheet. The second door side bracket 46 supports a second support shaft 482. The axis of the second support shaft 482 extends vertically. The second door side bracket 46 supports the top end of the second linkage arm 42 via the second support shaft 482, allowing it to rotate. As a result, the second linkage arm 42 can rotate about the axis of the second support shaft 482 relative to the second door side bracket 46. The second door side bracket 46 is fixed to the door 30 by fastening components.

[0052] <Gate drive device 50>

[0053] like Figure 4 and Figure 5 As shown, the door drive device 50 includes an actuator 60, an actuator bracket 71, a base 72, a first cover 75, and a second cover 76. Figures 6-8 As shown, the door drive device 50 includes a first support plate 73, a second support plate 74, two connecting shafts 77, a drive drum 90, a driven drum 100, two cables 171 and 172, a relay pulley 180, and a transmission part 190.

[0054] <Actuator 60>

[0055] Actuator 60 is the drive source used to open and close door 30. For example... Figures 4-6 As shown, the actuator 60 includes a motor 61, an output shaft 62, and a housing 63. The actuator 60 preferably has a transmission mechanism that transmits power from the motor 61 to the output shaft 62. The housing 63 is box-shaped. The housing 63 is rectangular when viewed in the width direction. The housing 63 houses the motor 61. The actuator 60 switches the rotation direction of the output shaft 62 by switching the driving mode of the motor 61. Thus, the output shaft 62 of the actuator 60 rotates in a first driving direction R11 and a second driving direction R12, which is the opposite direction to the first driving direction R11.

[0056] <Actuator bracket 71 and base 72>

[0057] The actuator bracket 71 (hereinafter also referred to as "ACT bracket 71") is a structure that secures the actuator 60 to the vehicle body 20. The ACT bracket 71 is preferably made of a highly rigid material, such as metal. The base 72 is a structural component on which the door opening / closing device 40 is assembled. The base 72 is preferably made of a highly rigid material, such as metal. The base 72 is secured to the first vehicle body side bracket 43 by fastening components.

[0058] <Support plates 73, 74>

[0059] like Figures 6-8As shown, the first support plate 73 and the second support plate 74 are constructed, for example, by stamping a metal sheet. The first support plate 73 and the second support plate 74 are arranged at intervals in the vertical direction. The first support plate 73 and the second support plate 74 are connected in the vertical direction by two connecting shafts 77. The first support plate 73 and the second support plate 74 are fastened to the base 72 by fastening members.

[0060] <Cover 75, 76>

[0061] like Figure 4 As shown, the first cover 75 is a component that covers a portion of the drive drum 90 and cables 171, 172. The first cover 75 is secured to the ACT bracket 71 along with the actuator 60 by fastening components. Additionally, the first cover 75 is secured to the base 72 by fastening components. Figure 6 and Figure 7 As shown, the second cover 76 is a component that covers a portion of the driven drum 100 and cables 171, 172. The second cover 76 is fixed to the first support plate 73 by fastening components.

[0062] <Drive Drum Cylinder 90>

[0063] like Figure 6 As shown, the drive drum 90 is cylindrical. The drive drum 90 has a spiral guide groove 91. The guide groove 91 is located on the outer circumferential surface of the drive drum 90. The drive drum 90 is fixed to the output shaft 62 of the actuator 60. That is, the rotation axis of the drive drum 90 is aligned with the rotation axis of the output shaft 62 of the actuator 60. The drive drum 90 can rotate together with the output shaft 62 of the actuator 60 in the first drive direction R11 and the second drive direction R12.

[0064] <Structural elements of the driven drum 100>

[0065] like Figure 9 and Figure 10 As shown, the driven drum 100 includes a main shaft 110, a first drum 120, a second drum 130, a first collar 140, a second collar 150, and a spring 160.

[0066] <Main Spindle 110>

[0067] The main shaft 110 has two shaft portions 111 and 112, a first engaging shaft portion 113, a second engaging shaft portion 114, a large-diameter shaft portion 115, an extension shaft portion 116, and a gear portion 117. The two shaft portions 111 and 112 constitute the two ends of the main shaft 110 in the axial direction. The outer diameters of the two shaft portions 111 and 112 are smaller than the outer diameters of the other parts of the main shaft 110. The first engaging shaft portion 113 is axially adjacent to the shaft portion 111. The cross-sectional shape of the first engaging shaft portion 113 orthogonal to the axial direction is non-circular. Specifically, the cross-sectional shape of the first engaging shaft portion 113 orthogonal to the axial direction is oblong. The second engaging shaft portion 114 is axially adjacent to the first engaging shaft portion 113. The cross-sectional shape of the second engaging shaft portion 114 orthogonal to the axial direction is non-circular. Specifically, the cross-sectional shape of the second engaging shaft portion 114 orthogonal to the axial direction is oblong. The outer diameter of the second engaging shaft portion 114 is larger than that of the first engaging shaft portion 113. The large-diameter shaft portion 115 is plate-shaped. The large-diameter shaft portion 115 is axially adjacent to the second engaging shaft portion 114. The outer diameter of the large-diameter shaft portion 115 is the largest portion of the outer diameter of the main shaft 110. The extension shaft portion 116 is axially adjacent to the large-diameter shaft portion 115. The gear portion 117 is axially located between the large-diameter shaft portion 115 and the shaft portion 112.

[0068] <First drum tube 120 and second drum tube 130>

[0069] The first drum 120 is cylindrical. The first drum 120 has a guide groove 121 and a locking hole 122. The guide groove 121 is spiral-shaped and located on the outer circumferential surface of the first drum 120. The locking hole 122 extends through the first drum 120 along its axial direction. When viewed axially, the locking hole 122 is non-circular. Specifically, the inner circumferential surface of the first drum 120 includes two first inner circumferential surfaces 123 and two second inner circumferential surfaces 124 orthogonal to the radial direction, and four limiting surfaces 125 orthogonal to the circumferential direction. The inner diameter of the first inner circumferential surfaces 123 is smaller than the inner diameter of the second inner circumferential surfaces 124. The two first inner circumferential surfaces 123 and two second inner circumferential surfaces 124 are arranged alternately circumferentially. The limiting surfaces 125 connect adjacent first inner circumferential surfaces 123 and second inner circumferential surfaces 124 radially.

[0070] The second drum 130 has the same shape as the first drum 120. That is, the second drum 130 has a guide groove 131 corresponding to the guide groove 121 and a locking hole 132 corresponding to the locking hole 122. The locking hole 132 is slightly larger than the locking hole 122 of the first drum 120. The outer diameter of the first drum 120 and the outer diameter of the second drum 130 are equal. In addition, the inner circumferential surface of the second drum 130 includes two first inner circumferential surfaces 133 corresponding to the two first inner circumferential surfaces 123, two second inner circumferential surfaces 134 corresponding to the two second inner circumferential surfaces 124, and four limiting surfaces 135 corresponding to the four limiting surfaces 125.

[0071] The outer diameter of the driven drum 100, i.e., the outer diameter of the first drum 120 and the outer diameter of the second drum 130, is larger than the outer diameter of the driving drum 90. Specifically, the distance from the axis of the first drum 120 to the bottom surface of the guide groove 121 of the first drum 120 is longer than the distance from the axis of the driving drum 90 to the bottom surface of the guide groove 91 of the driving drum 90. Similarly, the distance from the axis of the second drum 130 to the bottom surface of the guide groove 131 of the second drum 130 is longer than the distance from the axis of the driving drum 90 to the bottom surface of the guide groove 91 of the driving drum 90.

[0072] <First collar 140 and second collar 150>

[0073] The first collar 140 has a cylindrical portion 141, two limiting ribs 142, and a flange 143. The cylindrical portion 141 is cylindrical. The outer diameter of the cylindrical portion 141 is slightly smaller than the inner diameter of the portion of the first drum 120 that forms two first inner circumferential surfaces 123. The cylindrical portion 141 has an insertion hole 144 extending through the cylindrical portion 141 axially. When viewed axially, the insertion hole 144 is non-circular. The shape of the insertion hole 144 corresponds to the shape of the first engaging shaft portion 113 of the main shaft 110. The two limiting ribs 142 protrude radially outward from the outer circumference of the cylindrical portion 141. The outer surfaces of the two limiting ribs 142 in the protruding direction are arcuate surfaces centered on the axis of the first collar 140. The two limiting ribs 142 are arranged at equal intervals in the circumferential direction of the first collar 140. The outer diameter of the portion with two limiting ribs 142 is larger than the inner diameter of the portion of the first drum 120 with the first inner circumferential surface 123, and slightly smaller than the inner diameter of the portion of the first drum 120 with the second inner circumferential surface 124. Furthermore, the circumferential length of the limiting ribs 142 is shorter than the circumferential length of the second inner circumferential surface 124 of the first drum 120. For example, the former's length is preferably about one-half to one-third of the latter's length. In this respect, it can be said that the outer shape of the first collar 140 corresponds to the shape of the engaging hole 122 of the first drum 120. The flange 143 is flange-shaped. The flange 143 extends radially outward from one axial end of the cylindrical portion 141.

[0074] The second collar 150 has the same structure as the first collar 140. The second collar 150 has a cylindrical portion 151 corresponding to the cylindrical portion 141, two limiting ribs 152 corresponding to the two limiting ribs 142, and a flange 153 corresponding to the flange 143. However, the shape of the through hole 154 corresponding to the through hole 144 corresponds to the shape of the second engaging shaft portion 114 of the main shaft 110. Furthermore, the outer shape of the second collar 150 corresponds to the engaging hole 132 of the second drum 130.

[0075] <Spring 160>

[0076] Spring 160 is a torsion spring. Spring 160 has a first coil 161, a second coil 162, a middle portion 163, a first locking portion 164, and a second locking portion 165. Spring 160 is constructed from a single wire. The first coil 161 and the second coil 162 are coiled. The first locking portion 164 extends from a first end of the first coil 161, and the second locking portion 165 extends from a first end of the second coil 162. The first locking portion 164 and the second locking portion 165 extend along the axial direction of spring 160. However, the extending direction of the first locking portion 164 is opposite to the extending direction of the second locking portion 165. The middle portion 163 connects the second end of the first coil 161 and the second end of the second coil 162. When viewed axially, the middle portion 163 is wound into a rectangular shape. Spring 160 is equivalent to a "force-applying component".

[0077] <Interlocking Relationship of Structural Elements of Driven Drum 100>

[0078] like Figures 9-12 As shown, the first engaging shaft portion 113 and the second engaging shaft portion 114 of the spindle 110 are respectively inserted into the through hole 144 of the first collar 140 and the through hole 154 of the second collar 150. The first collar 140 engages with the first engaging shaft portion 113 of the spindle 110, and the second collar 150 engages with the second engaging shaft portion 114 of the spindle 110. Thus, the first collar 140 and the second collar 150 can rotate together with the spindle 110. In other words, the first collar 140 and the second collar 150 cannot rotate relative to the spindle 110. Furthermore, the flange 143 of the first collar 140 contacts the axial end face of the second engaging shaft portion 114 of the spindle 110. As a result, there is a gap between the first collar 140 and the second collar 150 in the axial direction.

[0079] like Figure 10 and Figure 11 As shown, a first collar 140 is inserted into the engagement hole 122 of the first drum 120. At this time, radially, the two limiting ribs 142 of the first collar 140 are opposite to the two second inner circumferential surfaces 124 of the first drum 120. Furthermore, circumferentially, the limiting ribs 142 of the first collar 140 are located between the two limiting surfaces 125 of the first drum 120. Thus, the first drum 120 can rotate relative to the first collar 140 within a range where the limiting surfaces 125 of the first drum 120 do not contact the limiting ribs 142 of the first collar 140. Specifically, the range of relative rotation of the first drum 120 relative to the first collar 140 corresponds to the angular range obtained by subtracting the circumferential length of the limiting ribs 142 of the first collar 140 from the circumferential length of the second inner circumferential surface 124 of the first drum 120.

[0080] like Figure 10 and Figure 12 As shown, a second collar 150 is inserted into the engagement hole 132 of the second drum 130. In this case, radially, the two limiting ribs 152 of the second collar 150 are respectively opposite to the two second inner circumferential surfaces 134 of the second drum 130. Furthermore, circumferentially, the limiting ribs 152 of the second collar 150 are located between the two limiting surfaces 135 of the second drum 130. Thus, the second drum 130 can rotate relative to the second collar 150 within a range where the limiting surfaces 135 of the second drum 130 do not contact the limiting ribs 152 of the second collar 150. Specifically, the range of relative rotation of the second drum 130 relative to the second collar 150 corresponds to the angular range obtained by subtracting the circumferential length of the limiting ribs 152 of the second collar 150 from the circumferential length of the second inner circumferential surface 134 of the second drum 130.

[0081] like Figure 10 As shown, spring 160 is axially located between first collar 140 and second collar 150, and disposed between first drum 120 and second drum 130. Specifically, the first coil 161 of spring 160 is housed inside the first drum 120. The first locking portion 164 of spring 160 is locked to the first drum 120. Furthermore, the second coil 162 of spring 160 is housed inside the second drum 130. The second locking portion 165 of spring 160 is locked to the second drum 130. The second engaging shaft portion 114 of spindle 110 is inserted into the middle portion 163 of spring 160. The middle portion 163 of spring 160 is axially disposed between the flange 143 of first collar 140 and the flange 153 of second collar 150 of spindle 110.

[0082] Spring 160 is in a state of elastic deformation about the axis of main shaft 110. Therefore, spring 160 exerts a force on the first drum 120 and the second drum 130 in the circumferential direction. The direction of the force exerted by spring 160 on the first drum 120 is opposite to the direction of the force exerted by spring 160 on the second drum 130. More specifically, as... Figure 11 and Figure 12 As shown, spring 160 applies a force to the first drum 120 in a first driven direction R21 and a force to the second drum 130 in a second driven direction R22. Preferably, in the circumferential direction, the limiting surface 125 of the first drum 120 does not contact the limiting rib 142 of the first collar 140. Similarly, preferably, in the circumferential direction, the limiting surface 135 of the second drum 130 does not contact the limiting rib 152 of the second collar 150.

[0083] like Figures 6-8As shown, the shaft portion 111 of the main shaft 110 is rotatably supported on the second cover 76, and the shaft portion 112 of the main shaft 110 is rotatably supported on the second support plate 74. The shaft portions 111 and 112 of the main shaft 110 are preferably supported on the second cover 76 and the second support plate 74 via bearings, respectively. In this way, the driven drum 100 can rotate about an axis extending in the vertical direction. The axis of rotation of the driven drum 100 is in a torsional position relative to the axis of rotation of the driving drum 90.

[0084] <First cable 171 and second cable 172>

[0085] like Figure 6 As shown, the first cable 171 and the second cable 172 are power transmission cables. Therefore, the first cable 171 and the second cable 172 are preferably made of a material that has moderate elasticity relative to the bending direction and strength relative to the tensile direction. The first cable 171 is wound around the first drum 120 of the drive drum 90 and the driven drum 100. The second cable 172 is wound around the second drum 130 of the drive drum 90 and the driven drum 100. When the drive drum 90 rotates in the first driving direction R11, the first cable 171 is fed from the driven drum 100 and wound around the drive drum 90. Meanwhile, the second cable 172 is fed from the drive drum 90 and wound around the driven drum 100. At this time, the rotation direction of the driven drum 100 is the second driven direction R22. On the other hand, when the drive drum 90 rotates in the second driving direction R12, the first cable 171 is fed from the drive drum 90 and wound around the driven drum 100. Additionally, the second cable 172 is fed from the driven drum 100 and wound around the driving drum 90. At this time, the rotation direction of the driven drum 100 is the first driven direction R21.

[0086] As described above, the spring 160 of the driven drum 100 exerts a force on the first drum 120 in a first driven direction R21 and on the second drum 130 in a second driven direction R22. In other words, the spring 160 exerts a force on the first drum 120 in the direction in which the first drum 120 is wound around the first cable 171, and exerts a force on the second drum 130 in the direction in which the second drum 130 is wound around the second cable 172.

[0087] <Relay pulley 180>

[0088] The relay pulley 180 includes a first pulley 181, a second pulley 182, and a pulley support shaft 183. The first pulley 181 and the second pulley 182 are rotatably supported on the pulley support shaft 183. The first pulley 181 and the second pulley 182 are capable of rotating in different directions. Figure 5 and Figure 6As shown, a first cable 171 is wound around a first pulley 181, and a second cable 172 is wound around a second pulley 182. One end of a pulley support shaft 183 is rotatably supported on a base 72, and the other end is rotatably supported on a second cover 76. The two ends of the pulley support shaft 183 are preferably supported on the base 72 and the second cover 76 respectively via bearings. The axis of the pulley support shaft 183 extends in the width direction. At this point, the axis of the pulley support shaft 183 is parallel to the axis of the drive drum 90. On the other hand, the axis of the pulley support shaft 183 is torsional relative to the axis of the driven drum 100.

[0089] <Department of Transmission 190>

[0090] like Figure 8 As shown, the transmission section 190 has a first transmission gear 191 and a second transmission gear 192. The first transmission gear 191 and the second transmission gear 192 are configured to rotate integrally. The first transmission gear 191 has more teeth than the gear section 117 of the main shaft 110. The upper end of the transmission section 190 is rotatably supported on a first support plate 73, and the lower end of the transmission section 190 is rotatably supported on a second support plate 74. The two ends of the transmission section 190 are preferably supported on the first support plate 73 and the second support plate 74 via bearings. Figure 13 As shown, the first transmission gear 191 meshes with the gear portion 117 of the main shaft 110 of the driven drum 100, and the second transmission gear 192 meshes with the output gear 414 of the first connecting arm 41. Thus, the transmission section 190 transmits power between the driven drum 100 and the first connecting arm 41. In other words, by transmitting power to the first connecting arm 41 through the transmission section 190, a torque is applied to the first connecting arm 41 to rotate it about the axis of the first support shaft 471.

[0091] <Control Device 200>

[0092] The control device 200 is a processing circuit with a CPU and a ROM. The control device 200 controls the door drive device 50 to open or close the door 30. For example, when a user operates a laptop or a door handle, the control device 200 receives an opening or closing request from the door 30. Upon receiving an opening request, the control device 200 controls the door drive device 50 to open the door 30. Conversely, upon receiving a closing request, the control device 200 controls the door drive device 50 to close the door 30.

[0093] <The function of this implementation method>

[0094] The function of the door 30 when it is opened and closed is explained.

[0095] like Figure 1 and Figure 13 As shown, when the door 30 is opened from the fully closed position, the drive drum 90 is driven in the first drive direction R11 by the actuator 60. The drive drum 90 then winds the first cable 171 and outputs the second cable 172. Meanwhile, the driven drum 100 winds the second cable 172 and outputs the first cable 171. As a result, the driven drum 100 rotates in the second driven direction R22. Then, as the driven drum 100 rotates in the second driven direction R22, power is transmitted from the gear section 117 of the driven drum 100 to the first transmission gear 191 of the transmission section 190. Next, power is transmitted from the second transmission gear 192 of the transmission section 190 to the output gear 414 of the first connecting rod arm 41. Thus, the door drive device 50 applies a torque to the first linkage arm 41, causing the first linkage arm 41 to rotate about the axis of the first support shaft 471 in the first rotational direction R31. As a result, by rotating the first linkage arm 41 in the first rotational direction R31, the door 30 opens towards the fully open position. That is, the door 30... Figure 1 and Figure 13 The fully closed position shown is oriented towards Figure 2 and Figure 14 The fully open position action is shown.

[0096] like Figure 2 and Figure 14 As shown, when the door 30 is closed from the fully open position, the drive drum 90 is driven in the second drive direction R12 by the actuator 60. The drive drum 90 then winds the second cable 172 and outputs the first cable 171. Meanwhile, the driven drum 100 winds the first cable 171 and outputs the second cable 172. As a result, the driven drum 100 rotates in the first driven direction R21. Then, as the driven drum 100 rotates in the first driven direction R21, power is transmitted from the gear section 117 of the driven drum 100 to the first transmission gear 191 of the transmission section 190. Next, power is transmitted from the second transmission gear 192 of the transmission section 190 to the output gear 414 of the first linkage arm 41. Thus, the door drive device 50 applies a torque to the first linkage arm 41, causing the first linkage arm 41 to rotate about the axis of the first support shaft 471 in the second rotational direction R32. As a result, by rotating the first linkage arm 41 in the second rotational direction R32, the door 30 closes towards the fully closed position. That is, the door 30 moves from... Figure 2 and Figure 14 The fully open position shown is oriented towards Figure 1 and Figure 13 The fully closed position operation is shown.

[0097] <Effects of this implementation method>

[0098] (1) For example, consider a comparative example where the driven drum 100 is directly driven by the actuator 60. In this case, when the axis of the output shaft 62 of the actuator 60 is aligned with the axis of the driven drum 100, then... Figure 15 The actuator 60 is positioned in the area indicated by the double-dotted line. Therefore, the space occupied by the comparative example's door opening and closing device in the width direction is increased. In other words, the extension of the comparative example's door opening and closing device relative to the actuator 60 into the vehicle compartment is increased.

[0099] In contrast, the door opening and closing device 40 transmits power from the actuator 60 to the output gear 414 of the first linkage arm 41 via the drive drum 90, the driven drum 100, and cables 171 and 172. Therefore, the door opening and closing device 40 can be positioned near the first linkage arm 41 with the driven drum 100 and the transmission part 190, while the actuator 60 and the drive drum 90 can be positioned away from the first linkage arm 41. Thus, the door opening and closing device 40 increases the freedom of arrangement of the door drive device 50. As a result, when the door 30 is in the fully closed position, the door opening and closing device 40 can suppress the amount of extension relative to the vehicle compartment. That is, the door opening and closing device 40 can widen the passenger space of the vehicle 10 in the width direction, or widen the trunk in the width direction.

[0100] (2) In the door opening and closing device 40, the outer diameter of the driven drum 100 is larger than the outer diameter of the driving drum 90. Therefore, the door opening and closing device 40 can reduce the rotational speed of the driven drum 100 relative to the rotational speed of the driving drum 90. As a result, when the door opening and closing device 40 has a structure for deceleration arranged between the driven drum 100 and the transmission part 190, the structure for deceleration can be reduced. In detail, the door opening and closing device 40 can reduce the number of gears in the gear part 117 of the main shaft 110 constituting the driven drum 100 and the gears in the transmission part 190.

[0101] (3) For example, when adjusting the slack of cables 171, 172 disposed between the drive drum 90 and the driven drum 100 using a tensioner, it is necessary to ensure space between the drive drum 90 and the driven drum 100 for installing the tensioner. In this respect, in the door opening and closing device 40 of the above embodiment, the structural component of the "tensioner" is assembled to the driven drum 100. Therefore, the door opening and closing device 40 does not require ensuring space between the drive drum 90 and the driven drum 100 for installing the tensioner.

[0102] (4) The driven drum 100 includes a first drum 120 with a first cable 171 wound around it, a second drum 130 with a second cable 172 wound around it, and a spring 160 that applies force to the first drum 120 in the direction of winding the first cable 171 and to the second drum 130 in the direction of winding the second cable 172. Therefore, the door opening and closing device 40 can achieve a tensioner for slack in the first cable 171 and the second cable 172 with a simple structure. In addition, the spring 160 is housed inside the first drum 120 and the second drum 130. In this respect, the door opening and closing device 40 can prevent the tensioner from interfering with the structure around the driven drum 100.

[0103] (5) Consider a comparative example where the "drive drum 90, relay pulley 180, driven drum 100, and cables 171, 172" of the door opening and closing device 40 are replaced with "drive pulley, relay pulley, driven pulley, and belt". In this comparative example, due to the use of a belt to transmit power, the deviation in the width direction of the positions of the drive pulley, relay pulley, and driven pulley tends to have a greater impact on the power transmission efficiency. This tendency is more pronounced when toothed belts and toothed pulleys are used. In contrast, in this embodiment, when power is transmitted using cables 171, 172, the deviation in the width direction of the positions of the drive drum 90, relay pulley 180, and driven drum 100 has a smaller impact on the power transmission efficiency. Therefore, the door opening and closing device 40 can increase the degree of freedom in the width direction arrangement of the drive drum 90, relay pulley 180, and driven drum 100.

[0104] (6) The first vehicle body side bracket 43 supports the base end side connection portion 412 of the first linkage arm 41 via the first support shaft 471 so that it can rotate. At this time, the first support shaft 471 passes through the base end side connection portion 412 of the first linkage arm 41 in the vertical direction. Therefore, the rigidity of the structure that supports the base end side connection portion 412 of the first linkage arm 41 so that it can rotate is increased.

[0105] <Example of Change>

[0106] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined and implemented with each other within the scope of technical inconsistency.

[0107] Reference Figures 16-18 The modified door opening and closing device 40X will be described below. Compared to the door opening and closing device 40 of the above-described embodiment, the modified door opening and closing device 40X is substantially the same, except that it lacks the relay pulley 180 and the positional relationship between the drive drum 90 and the driven drum 100 is different. Therefore, in the following description, structures with the same function as those in the above-described embodiment will be labeled with the same symbols and their descriptions will be omitted.

[0108] like Figure 16 and Figure 17 As shown, the door opening and closing device 40X includes a door drive device 50X. The door drive device 50X includes: an actuator 60, an actuator bracket 71, a base 72, a first cover 75, a second cover 76, a first support plate 73, a second support plate 74, multiple connecting shafts 77, a drive drum 90, a driven drum 100, two cables 171 and 172, and a transmission part 190. That is, the door drive device 50X does not include a relay pulley 180.

[0109] In this modified example, the actuator 60 is positioned below the drive drum 90 as described in the above embodiment. In this respect, the vertical distance between the rotation axis of the drive drum 90 and the rotation axis of the driven drum 100 is shorter than in the above embodiment. Similarly to the above embodiment, the rotation axis of the drive drum 90 and the rotation axis of the driven drum 100 are in a torsional positional relationship. Here, as... Figure 18 As shown, a plane orthogonal to the rotation axis of the drive drum 90, i.e., a plane passing through the axial center of the drive drum 90 within the forming range of the guide groove 91 of the drive drum 90, is designated as the reference plane RP of the drive drum 90. In the width direction, the reference plane RP of the drive drum 90 is located at a position offset from the rotation axis of the driven drum 100. In a modified example, the reference plane RP of the drive drum 90 is located at a position offset inward in the width direction from the rotation axis of the driven drum 100. In another modified example, the reference plane RP of the drive drum 90 may also be located at a position offset outward in the width direction from the rotation axis of the driven drum 100. In this respect, it can also be said that in the width direction, the drive drum 90 is located at a position offset from the rotation axis of the driven drum 100.

[0110] A first cable 171 is wound around the first drum 120 of the driving drum 90 and the driven drum 100. A second cable 172 is wound around the second drum 130 of the driving drum 90 and the driven drum 100. The first cable 171 and the second cable 172 are wound around the driving drum 90 and the driven drum 100 without passing through the relay pulley 180. That is, the first cable 171 and the second cable 172 extend in a straight line between the driving drum 90 and the driven drum 100.

[0111] Figures 16-18The modified example shown achieves the same effects as the embodiment described above. Furthermore, by omitting the relay pulley 180, the modified example allows the drive drum 90 and driven drum 100 to be positioned close together. As a result, the modified example can prevent the device from becoming too large in the vertical direction, or can shorten the lengths of the first cable 171 and the second cable 172. Additionally, according to the vehicle 10 equipped with the door opening / closing device 40X, by staggering the positions of the drive drum 90 and driven drum 100 in the width direction, the mounting space for the door opening / closing device 40X in the vehicle 10 can be effectively utilized.

[0112] In the above-described modified example, the reference plane RP of the driving drum 90 may also overlap with the rotation axis of the driven drum 100 in the width direction. That is, the driving drum 90 may not be located at a position offset from the rotation axis of the driven drum 100 in the width direction.

[0113] The door drive device 50 can also apply torque to the base end of the first linkage arm 41 or to the top end of the first linkage arm 41.

[0114] The structure equivalent to a "tensioner" can also be assembled on the drive drum 90 instead of the driven drum 100. The structure equivalent to a "tensioner" can also be assembled on both the drive drum 90 and the driven drum 100.

[0115] The door drive device 50 may also not have a structure equivalent to a "tensioner". In this case, the driven drum 100 is preferably made of a separate component, just like the drive drum 90.

[0116] The diameter of the driving drum 90 can be equal to or smaller than the diameter of the driven drum 100.

[0117] In the driven drum 100, the spring 160 can also be divided into a spring that applies force to the first drum 120 and a spring that applies force to the second drum 130.

[0118] In the driven drum 100, the spring 160 only needs to be a structure that can apply force to the first drum 120 and the second drum 130. For example, the spring 160 can also be replaced with an elastic body such as rubber.

[0119] The first cable 171 and the second cable 172 can also be a single cable. For example, the ends of the first cable 171 and the second cable 172, which are locked to the drive drum 90, can also be connected.

[0120] The door opening and closing device 40 may also have multiple relay pulleys 180 in the configuration path of the first cable 171 and the second cable 172 between the driving drum 90 and the driven drum 100.

[0121] The drive drum 90 may or may not be offset relative to the rotation axis of the driven drum 100. Preferably, such offset is appropriately set according to the mounting space of the door opening and closing device 40 relative to the vehicle 10.

[0122] The door opening and closing device 40 may also include a tensioner that eliminates slack in the first cable 171 by pressing the first cable 171 disposed between the drive drum 90 and the driven drum 100 in a direction that intersects the extending direction of the first cable 171. The door opening and closing device 40 may also include a tensioner that eliminates slack in the second cable 172 by the same method.

[0123] The transmission unit 190 can be any structure capable of transmitting power from the driven drum 100 to the first link arm 41. For example, the transmission unit 190 can also be a drive arm that rotates based on the power transmitted from the driven drum 100. In this case, it is preferable that the drive arm applies a torque to the first link arm 41 by rotating, causing the first link arm 41 to rotate about the axis of the first support shaft 471.

[0124] In the above embodiment, the door opening and closing device 40 is applied to the rear door of the vehicle 10, but in a modified embodiment, the door opening and closing device 40 can also be applied to the front door of the vehicle 10.

[0125] <Summary of this implementation method>

[0126] A vehicle door opening and closing device is applied to a vehicle having a body and a door, the body having a door opening for opening and closing, wherein the device comprises: a linkage arm, the base of which is rotatably connected to the body, and the tip of which is rotatably connected to the door; and a door drive device that applies a torque to the linkage arm to rotate it relative to the body, the door drive device comprising: a drive drum driven by an electric motor; a driven drum disposed away from the drive drum; a cable wound around the drive drum and the driven drum and transmitting power from the drive drum to the driven drum; and a transmission unit that applies the torque to the linkage arm based on the power transmitted from the driven drum.

[0127] The vehicle door opening and closing mechanism transmits power from the electric motor to the transmission unit via a drive drum, a driven drum, and cables. Therefore, the vehicle door opening and closing mechanism can be configured either with the driven drum and transmission unit near the linkage arm, or with the drive drum and electric motor located further away from the linkage arm. This increases the flexibility in configuring the structural elements of the door drive mechanism.

[0128] In a vehicle door opening and closing device, it is preferable that the diameter of the driving drum is smaller than the diameter of the driven drum.

[0129] When transmitting power from the drive drum to the driven drum, the vehicle door opening and closing device can reduce the rotational speed of the driven drum to less than that of the drive drum. Therefore, when a deceleration structure is provided between the driven drum and the transmission part in the vehicle door opening and closing device, the size of this structure can be reduced. Alternatively, if a sufficient reduction ratio can be ensured, the vehicle door opening and closing device may not have a deceleration structure between the driven drum and the transmission part.

[0130] In a vehicle door opening and closing device, preferably, the door drive device has a tensioner for adjusting the slack of the cable, the tensioner being assembled to at least one of the drive drum and the driven drum.

[0131] When using a tensioner to adjust the slack of the cable positioned between the drive drum and the driven drum, it is necessary to ensure space for installing the tensioner between the drive drum and the driven drum. In this respect, in the vehicle door opening and closing device with the above-described structure, the tensioner is assembled on at least one of the drive drum and the driven drum, so it is not necessary to ensure space for installing the tensioner between the drive drum and the driven drum.

[0132] In a vehicle door opening and closing device, preferably, the driven drum has a first drum and a second drum, which are arranged along the extension direction of the rotation axis of the driven drum and have the cable wound around them. When the driven drum rotates in a first driven direction, the first drum winds the cable and delivers the cable from the second drum. On the other hand, when the driven drum rotates in a second driven direction, which is the opposite direction to the first driven direction, the cable is delivered from the first drum and the second drum winds the cable. The tensioner has a force-applying member that applies force to the first drum in the first driven direction and applies force to the second drum in the second driven direction.

[0133] The vehicle door opening and closing device can be assembled into a tensioner with a simple structure.

[0134] In a vehicle door opening and closing device, preferably, the rotation axis of the driving drum and the rotation axis of the driven drum are in a torsional positional relationship, and the driving drum is offset from the rotation axis of the driven drum in the width direction of the vehicle.

[0135] By staggering the positions of the drive drum and the driven drum in the width direction, the mounting space of the vehicle door opening and closing device can be effectively utilized in a vehicle equipped with a door opening and closing device.

Claims

1. A vehicle door opening and closing device, applied to a vehicle having a body and a door, the body having a door opening, the door opening and closing the door opening, wherein, have: A linkage arm, the base of which is rotatably connected to the vehicle body, and the tip of which is rotatably connected to the door; and A door drive mechanism that applies a torque to the linkage arm causing it to rotate relative to the vehicle body. The gate drive device has: The drive drum is driven by an electric motor. The driven drum is configured remotely from the driving drum; A cable is wound around the drive drum and the driven drum, and transmits power from the drive drum to the driven drum; as well as A transmission unit that applies the torque to the connecting arm based on the power transmitted from the driven drum.

2. The vehicle door opening and closing device according to claim 1, wherein, The diameter of the driving drum is smaller than the diameter of the driven drum.

3. The vehicle door opening and closing device according to claim 1 or 2, wherein, The door drive device has a tensioner for adjusting the slack of the cable. The tensioner is assembled on at least one of the driving drum and the driven drum.

4. The vehicle door opening and closing device according to claim 3, wherein, The driven drum has a first drum and a second drum, which are arranged along the extension direction of the rotation axis of the driven drum and are wound with the cable. When the driven drum rotates in the first driven direction, the first drum winds the cable and delivers the cable from the second drum. Conversely, when the driven drum rotates in the second driven direction, which is opposite to the first driven direction, the cable is delivered from the first drum and the second drum winds the cable. The tensioner has a force-applying component that applies force to the first drum in the first driven direction and to the second drum in the second driven direction.

5. The vehicle door opening and closing device according to claim 1, wherein, The rotation axis of the driving drum and the rotation axis of the driven drum are in a torsional positional relationship. In the width direction of the vehicle, the drive drum is offset from the rotation axis of the driven drum.

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