JP7133709B2 - damper device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device that is applied to, for example, a glove box of a vehicle and that exerts a damping action during a predetermined operation such as opening the glove box.

For example, an opening/closing body such as a glove box of a vehicle is sometimes provided with a damper device in order to suppress the sudden opening of the opening/closing body. Such damper devices are known to have various mechanisms, one of which is known to use a rotary damper. A damper device using a rotary damper has the advantage that the device can be easily made compact.

As a damper device using a rotary damper, the following patent document 1 discloses a first part, a second part that is combined to be rotatable or relatively rotatable with this first part, and a viscous a rotary damper body configured to apply a braking force to the rotation by the viscous fluid, and having a pinion portion provided on either one of the first part and the second part; a supporting body for rotatably supporting the rotary damper body by housing the protrusion in the recess provided in the other of the first part and the second part of the rotary damper body; The depression and the protrusion are engaged with each other by the movement of the rotary damper body in the same direction as the rack body when the rack body combined with the pinion part is moved in one direction or when the rack body is moved relative to the pinion part. Also, when the rack is moved in the other direction or relatively moved, the engagement is released by moving the rotary damper in the same direction as the rack. A damper device is disclosed.

Patent No. 5836281

However, in the damper device of Patent Document 1, the rotary damper body itself is moved with respect to the support body as the rack body is moved to engage and disengage the recess and the projection. Therefore, it is difficult to smoothly switch from the disengaged state to the engaged state when the moving direction of the rack body is reversed, and the braking force response is not good.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a damper device having a good damping force response when the moving direction of the rack body is reversed.

In order to achieve the above object, the damper device of the present invention includes:
A rack body having a rack gear formed along the length direction, a rotary damper having a pinion gear meshing with the rack gear and a large-diameter gear provided on the outer periphery, and arranged to mesh with the large-diameter gear. A planetary gear, and a case that slidably holds the rack body and rotatably houses the rotary damper and the planetary gear,
The rotary damper has a rotor connected to the pinion gear, and a gear housing that surrounds the rotor via a viscous fluid, is mounted rotatably relative to the rotor, and has the large-diameter gear on its outer periphery. and
The case includes an accommodating portion that accommodates the planetary gear so as to be movable by a predetermined distance along the circumferential direction of the large-diameter gear in a state in which the planetary gear is meshed with the large-diameter gear of the rotary damper, and an inner wall of the accommodating portion. An engaging portion provided on one side for restricting the rotation of the planetary gear when the planetary gear abuts thereon; and a rotation permitting portion that permits the rotation in a state,
When the rack body moves in a predetermined direction, the planetary gear moves to one side of the accommodating portion as the gear housing rotates, engages with the engaging portion to be restricted from rotating, and rotates the rack body. When the gear housing moves to the opposite side, the planetary gear moves to the other side of the receiving portion with the rotation of the gear housing, contacts the rotation allowing portion, and is allowed to rotate. It is characterized by

According to the present invention, when the rack body moves in a predetermined direction, the planetary gear moves to one side of the accommodating portion as the gear housing rotates, and engages with the engaging portion to restrict rotation. The rotation of the gear housing stops via the planetary gears, and the rotor rotates with respect to the gear housing, so that a braking force is applied to the rotation of the rotor via the viscous fluid, and a braking force is applied to the movement of the rack body. Granted.

Further, when the rack body moves to the opposite side to the above, the planetary gear moves to the other side of the accommodating portion with the rotation of the gear housing and abuts against the rotation permitting portion to allow rotation, thereby preventing the rotor from rotating. The gear housing rotates along with the rotation, the braking force against the rotation of the rotor is released, and the braking force against the movement of the rack body is released.

Since the rotation of the gear housing is restricted or released by the movement of the planetary gears within the accommodating portion, the switching operation can be performed smoothly, and the braking force response when the moving direction of the rack body is reversed. can be improved.

It is an exploded perspective view showing one embodiment of a damper device concerning the present invention. It is a perspective view of the state where the same damper device was attached. It is an exploded perspective view of a rotary damper in the same damper device. It is sectional drawing cut in the width direction of the rack body of the same damper apparatus. FIG. 3 is a cross-sectional view of the rack body of the same damper device cut in the length direction; It is the perspective view which looked at the rack body of the same damper apparatus from the inner surface side. It is explanatory drawing which shows the sliding motion of the rack body of the same damper apparatus. It is explanatory drawing which shows the state at the time of applying a braking force of the same damper apparatus. It is explanatory drawing which shows the state at the time of braking force release of the same damper apparatus. It is explanatory drawing which shows the state at the time of braking force cancellation which changed the arrangement|positioning location of a planetary gear in the same damper apparatus. It is explanatory drawing which shows the state at the time of the damping|braking force application which changed the arrangement|positioning location of the planetary gear in the same damper apparatus. FIG. 11 is a perspective view of a state in which a rotary damper is incorporated in a case, showing another embodiment of the damper device according to the present invention; It is a sectional view of the same damper device. FIG. 5 is an exploded perspective view showing still another embodiment of the damper device according to the present invention; It is a perspective view which shows the meshing|engagement state of the large diameter gear and planetary gear of the rotation damper of the same damper apparatus. It is a perspective view of the state which accommodated the rotation damper and planetary gear of the same damper apparatus in the case. FIG. 5 is an exploded perspective view showing still another embodiment of the damper device according to the present invention; It is a perspective view which shows the meshing|engagement state of the large diameter gear and planetary gear of the rotation damper of the same damper apparatus. It is a perspective view of the state which accommodated the rotation damper and planetary gear of the same damper apparatus in the case. FIG. 5 is a plan sectional view showing still another embodiment of the damper device according to the present invention; It is a sectional side view of the same damper apparatus. FIG. 5 is a cross-sectional view showing still another embodiment of the damper device according to the present invention;

An embodiment of a damper device according to the present invention will be described below with reference to the drawings. 1 to 11 show an embodiment of a damper device according to the invention.

As shown in FIGS. 1 and 2, the damper device 100 includes a rotary damper 110, a case 130 that rotatably holds the rotary damper 110, and a case 130 that is slidably attached to the rotary damper 110. and a rack body 160 having a rack gear 170 (see FIG. 6) that meshes with the provided pinion gear 120 .

3, 4 and 5 together, the rotary damper 110 has a rotor 111 and a gear housing 115 which surrounds the rotor 111 via a viscous fluid and applies a braking force to the rotation of the rotor 111. ing. The gear housing 115 includes a large-diameter gear 116 having a recess 117 inside which accommodates the rotor 111 and having a gear formed on its outer periphery, and a cap 118 sealing the opening of the recess 117 of the large-diameter gear 116 . have. A shaft insertion hole 119 through which the support shaft 112 provided on the rotor 111 is inserted is formed in the central portion of the cap 118 . An arc-shaped rib 132 provided on a bottom wall 131 of a case 130 described later is fitted to the lower surface of the large-diameter gear 116, forming an annular groove 123 for rotatably supporting the rotary damper 110. (See Figure 5).

The rotor 111 is disk-shaped as a whole, and has a support shaft 112 projecting from the center of one side thereof. 115 protruding outside. The pinion gear 120 has a gear portion 121 on its outer periphery and a shaft hole 122 formed in its center. It is designed to rotate.

Therefore, when the pinion gear 120 rotates while the rotation of the large-diameter gear 116 is restricted, the rotor 111 rotates relative to the gear housing 115 via the support shaft 112, so that the rotor 111 rotates through the viscous fluid. braking force is applied.

1, 2, 4 and 5, the case 130 includes a bottom wall 131, a pair of side walls 134 erected from both sides of the bottom wall 131, and one end of the pair of side walls 134. and a front wall 139 erected from the bottom wall 131 so as to connect the two. Further, an arcuate rib 132 is formed on the inner surface of the bottom wall 131, and the arcuate rib 132 is fitted into an annular groove 123 formed in the bottom surface of the large-diameter gear 116 of the rotary damper 110 ( 5), and rotatably supports the large-diameter gear 116. As shown in FIG.

Further, a hook 133 is provided on the outer surface (lower surface) side of the bottom wall 131 for attachment to a member that imparts a damper action. For example, when applied to a glove box, the hook 133 is attached to the side wall of the main body provided on the vehicle body side, and the bracket 165 of the rack body 160 described later is attached to the main body so as to be openable and closable. It is connected to the side wall of the glove box.

Pressing flanges 135 extend inwardly from the upper edges of the pair of side walls 134. The pressing flanges 135 cover guide ribs 163 on both sides of the rack body 160, which will be described later. is slidably held. Elastic pieces 136 are formed through slits on the opposite side portions of the pair of pressing flanges 135, respectively, and elastic pieces 136 are elastically attached to the side walls 162 of the rack body 160, which will be described later, at the intermediate portions of the elastic pieces 136. A pressing protrusion 137 is formed to abut on the .

Also referring to FIGS. 8 and 9, housing portions 140 for housing planetary gears 150, which will be described later, are formed inside the connecting portions between the pair of side walls 134 and the front wall 139 of the case 130, respectively. The accommodating portion 140 has a shape that holds the planetary gear 150 so that the planetary gear 150 can be moved along the outer periphery of the large-diameter gear 116 by a predetermined distance, and is symmetrical with respect to the center line L shown in FIG. are provided in pairs. When the gear portion 151 of the planetary gear 150 comes into contact with one end of the accommodating portion 140 in the movement direction of the planetary gear 150 (the end near the center line L in FIG. 8), the planetary gear 150 rotates. is provided with an engaging portion 141 that regulates the In the case of this embodiment, the engaging portion 141 is configured by a corner portion that can be engaged with the gear portion 151 of the planetary gear 150 . When the planetary gear 150 abuts against the other end of the housing portion 140 in the moving direction of the planetary gear 150 (the end away from the center line L in FIG. 8), the planetary gear 150 is allowed to rotate. A rotation permitting portion 142 is provided. In the case of this embodiment, the rotation permitting portion 142 is composed of a concave curved surface that is arcuate in plan view, and the planetary gear 150 can rotate while being in contact with this curved surface.

Referring to FIGS. 6 and 7 together, the rack body 160 includes a board 161 having an elongated plate shape and a board 161 standing on both sides in the width direction of the board 161 facing the inner surface side of the board 161 (the direction facing the rotary damper 110). It has a pair of side walls 162 provided and guide ribs 163 extending outward from the ends of the side walls 162 in the projecting direction.

As shown in FIG. 4 , when the rack body 160 is inserted into the case 130 , the projection 114 formed on the protruding end face of the support shaft 112 abuts against the widthwise central portion of the inner surface side (lower surface side) of the substrate 161 . The pressing flange 135 covers the upper surface side of the guide rib 163 and is slidably held inside the case 130 . At this time, as shown in FIG. 7, the pressing protrusion 137 of the elastic piece 136 provided on the pressing flange 135 elastically contacts the side wall 162 of the rack body 160, and the rack body 160 rattles within the case 130. retained without

As shown in FIG. 6 , a rack gear 170 is formed along the longitudinal direction on the inner surface side of one side wall 162 , and this rack gear 170 meshes with a pinion gear 120 mounted on the support shaft 112 of the rotary damper 110 . It's like Therefore, when the rack body 160 slides with respect to the case 130 , the pinion gear 120 meshing with the rack gear 170 rotates, and the rotor 111 rotates via the support shaft 112 .

A pair of brackets 165 extend parallel to one end of the rack body 160 , and mounting holes 166 are formed in each bracket 165 . A mounting shaft projecting from the side wall of the glove box, for example, is inserted into the mounting hole 166 so that one end of the rack body 160 is attached to a component such as the glove box to which a braking force is to be applied.

Further, a stopper portion 164 is protruded from a portion of the rack body 160 near one longitudinal end of the pair of guide ribs 163. As shown in FIG. When the body 160 is pulled out, if the ends of the pair of side walls 134 of the case 130 come into contact with the stopper portions 164, further pulling out is restricted.

5 and 8, the lower surface of the rack body 160 is arranged so as to partially overlap the upper end surface of the planetary gear 150, thereby preventing the planetary gear 150 from coming off from the case 130. is to be done. Since the planetary gear 150 can be prevented from coming off using the rack body 160 in this manner, the structure can be made simple and compact.

Next, the operation of the damper device 100 configured as described above will be described.

The damper device 100 is mounted between a pair of parts that are close to each other and separate from each other to apply a braking force. For example, in the case of a glove box, as described above, the hook 133 of the case 130 is connected to the side wall of the main body provided on the vehicle body side, and the bracket 165 is attached to the side wall of the glove box that opens and closes the main body. They are connected via mounting holes 166 . When the glove box is closed, the bracket 165 is positioned close to the case 130 as shown in FIG. 7A. When the stopper portion 164 comes into contact with the case 130, further withdrawal is restricted. In this embodiment, when the glove box is pulled out, that is, in the process from FIG. 7A to FIG. , the damper device 100 is used.

As shown in FIG. 8, when rack body 160 is pulled out in direction A relative to case 130, pinion gear 120 meshing with rack gear 170 rotates counterclockwise as indicated by arrow C in the figure. Then, the rotor 111 connected to the pinion gear 120 via the support shaft 112 rotates, and the gear housing 115, which is in contact with the rotor 111 via the viscous fluid, also tries to rotate in the same direction (see FIG. 5). As a result, the large-diameter gear 116 rotates in the counterclockwise direction indicated by arrow C in FIG. . Then, the gear portion 151 of the planetary gear 150 is engaged with the engaging portion 141 of the accommodating portion 140, and the rotation of the planetary gear 150 is restricted. Only 111 will rotate. Therefore, a braking force is applied to the rotation of the rotor 111 through the viscous fluid, acting as a braking force to the movement of the rack body 160 in the arrow A direction. This prevents the glove box from opening suddenly.

Next, as shown in FIG. 9, when rack body 160 is pushed into case 130 in direction B, pinion gear 120 meshing with rack gear 170 rotates clockwise as indicated by arrow D in the figure. Then, the rotor 111 connected to the pinion gear 120 via the support shaft 112 rotates, and the gear housing 115, which is in contact with the rotor 111 via the viscous fluid, also tries to rotate in the same direction (see FIG. 5). As a result, the large-diameter gear 116 rotates clockwise as indicated by arrow D in FIG. Then, the gear portion 151 of the planetary gear 150 comes into contact with the inner wall of the rotation permitting portion 142 of the accommodating portion 140, allowing the planetary gear 150 to rotate. The braking force on the movement of 160 is released. As a result, the rack body 160 can be pushed into the case 130 with little resistance, and the glove box can be quickly closed.

In the damper device 100, when the movement direction of the rack body 160 is reversed, the planetary gear 150, which has an outer diameter smaller than that of the large-diameter gear 116, moves within the accommodating portion 140, thereby switching the braking force. , the movement distance required for switching can be shortened, and the responsiveness of braking force switching can be improved.

Further, in this embodiment, as shown in FIG. 8, the case 130 is formed in a shape symmetrical with respect to the center line L, and a pair of housing portions 140 are arranged at positions symmetrical with respect to the center line L. formed. Therefore, by selecting the accommodation portion 140 into which the planetary gear 150 is inserted, the braking direction of the rack body 160 can be changed.

That is, as shown in FIG. 10, when the planetary gear 150 is arranged in the housing portion 140 on the opposite side to that in FIG. Since the planetary gear 150 rotates and is allowed to rotate by coming into contact with the rotation-permitting portion 142 of the accommodating portion 140, it is possible to prevent application of a braking force.

11, when the planetary gear 150 is arranged in the housing portion 140 on the opposite side to that in FIG. , the planetary gear 150 is engaged with the engaging portion 141 of the accommodating portion 140 to restrict rotation, and the rotation of the large-diameter gear 116 is restricted. can do.

Therefore, with the same damper device 100 , it is possible to appropriately change the braking direction of the rack body 160 with respect to the case 130 simply by changing the arrangement of the planetary gear 150 .

12 and 13 show another embodiment of the invention. In the following description of the embodiment, portions that are substantially the same as those of the embodiment shown in FIGS. 1 to 11 are denoted by the same reference numerals, and description thereof will be omitted.

This damper device 100a differs from the above-described embodiment in the structure for preventing the planetary gear 150 from slipping out of the case 130. As shown in FIG. That is, of the large-diameter gear 116 and the cap 118 that constitute the gear housing 115 of the rotation damper 110 , the outer diameter of the cap 118 is increased and protrudes outward from the outer diameter of the large-diameter gear 116 . On the other hand, the axial length of the planetary gear 150 is shorter than in the above-described embodiment, and the outer peripheral edge of the protruding cap 118 is disposed so as to contact at least a portion of the axial end face of the planetary gear 150, This prevents the planetary gear 150 from coming off.

According to the above-described embodiment, the cap 118 of the gear housing 115 prevents the planetary gear 150 from coming off. can be made difficult.

Figures 14-16 show yet another embodiment of the invention. This damper device 100b differs from the above embodiment in the shapes of the planetary gear 150a and the large-diameter gear 116a.

That is, in this embodiment, the gear portion 151 of the planetary gear 150a forms a helical gear, and the large-diameter gear 116a also forms a helical gear that can mesh with the planetary gear 150a. The inclination direction of each helical gear is not particularly limited, but when the planetary gear 150a moves to the rotation permitting portion 142 of the housing portion 140 and meshes with the large-diameter gear 116a to rotate, the planetary gear 150a is moved to the case 130. It is preferable that the direction of inclination of the helical gear is set so that a pressing force acts on the bottom wall 131 . As a result, the planetary gear 150a is pressed against the bottom wall 131 of the case 130, and the looseness of the planetary gear 150a can be suppressed.

Figures 17-19 show yet another embodiment of the invention. This damper device 100c differs from the above embodiment in the shape of the planetary gear 150b.

That is, in the planetary gear 150b of this embodiment, a disc portion 152 having an outer diameter equal to or larger than the outer diameter of the gear portion 151 is formed adjacent to the axial end face of the gear portion 151. As shown in FIG. Therefore, as shown in FIG. 19, when the planetary gear 150b abuts against the rotation permitting portion 142 of the accommodating portion 140 and rotates, the disc portion 152 abuts against the inner periphery of the rotation permitting portion 142, so that smooth rotation is achieved. It is possible to suppress the occurrence of abnormal noise. The engaging portion 141 of the accommodating portion 140 is made lower than in the above-described embodiment, and the disk portion 152 does not come into contact with the engaging portion 141 .

20 and 21 show yet another embodiment of the invention. This damper device 100d differs from the above-described embodiment in the shape of the planetary gear 150c and the shape of the bottom surface of the accommodating portion 140. As shown in FIG.

17 to 19, the planetary gear 150c of the damper device 100d is adjacent to the axial end face (upper end face in the drawing) of the gear portion 151 and has an outer diameter equal to or larger than the outer diameter of the gear portion 151. , and a disk portion 152 having an outer diameter larger than that is formed, and a cylindrical portion 153 projecting downward with an outer diameter smaller than that of the gear portion 151 is formed at the center of the end face opposite to the disk portion 152. It is

A support groove 143 into which the cylindrical portion 153 is inserted is provided on the bottom surface of the housing portion 140 of the case 130 . The support groove 143 has a shape that allows the planetary gear 150c to move along the outer periphery of the large-diameter gear 116 with a distance that allows the large-diameter gear 116 to mesh properly. One end of the support groove 143 adjacent to the rotation permitting portion 142 has an arcuate shape that fits the outer circumference of the cylindrical portion 153 , and supports the cylindrical portion 153 when the planetary gear 150 moves to the rotation permitting portion 142 . As a result, the planetary gear 150 rotates smoothly. As described above, in this embodiment, the planetary gear 150c is moved while the cylindrical portion 153 is guided by the support groove 143, so that the planetary gear 150c can be moved without rattling. It is possible to more effectively suppress the generation of abnormal noise due to movement.

Yet another embodiment of the present invention is shown in FIG. This damper device 100e differs from the above-described embodiment in the shape of the large-diameter gear 116. As shown in FIG. That is, in this embodiment, the upper edge portion 116a of the large-diameter gear 116 extends like a flange so as to surround the outer periphery of the cap 118, and the lower surface of the upper edge portion 116a partially covers the upper end surface of the planetary gear 150. It is arranged so as to cover the planetary gear 150 and has a structure to prevent the planetary gear 150 from coming off from the case 130 .

According to the above embodiment, the planetary gear 150 is retained by the upper edge portion 116 a of the large-diameter gear 116 of the gear housing 115 . This makes it difficult for the planetary gear 150 to tilt.

100, 100a, 100b, 100c, 100d damper device 110 rotary damper 111 rotor 115 gear housing 116 large gear 118 cap 120 pinion gear 130 case 140 housing portion 141 engagement portion 142 rotation permitting portion 143 support grooves 150, 150a, 150b, 150c Planetary gear 151 Gear portion 152 Disc portion 153 Cylindrical portion 160 Rack body 170 Rack gear L Center line

Claims (8)

A rack body having a rack gear formed along the length direction, a rotary damper having a pinion gear meshing with the rack gear and a large-diameter gear provided on the outer periphery, and arranged to mesh with the large-diameter gear. A planetary gear, and a case that slidably holds the rack body and rotatably houses the rotary damper and the planetary gear,
The rotary damper has a rotor connected to the pinion gear, and a gear housing that surrounds the rotor via a viscous fluid, is mounted rotatably relative to the rotor, and has the large-diameter gear on its outer periphery. and
The case includes an accommodating portion that accommodates the planetary gear so as to be movable by a predetermined distance along the circumferential direction of the large-diameter gear in a state in which the planetary gear is meshed with the large-diameter gear of the rotary damper, and an inner wall of the accommodating portion. An engaging portion provided on one side for restricting the rotation of the planetary gear when the planetary gear abuts thereon; and a rotation permitting portion that permits the rotation in a state,
When the rack body moves in a predetermined direction, the planetary gear moves to one side of the accommodating portion as the gear housing rotates, engages with the engaging portion to be restricted from rotating, and rotates the rack body. When the gear housing moves to the opposite side, the planetary gear moves to the other side of the receiving portion with the rotation of the gear housing, contacts the rotation allowing portion, and is allowed to rotate. A damper device characterized in that The inner surface of the inside of the case of the rack body is arranged so as to be able to come into contact with at least a part of the axial end surface of the planetary gear accommodated in the accommodating portion of the case, thereby preventing the planetary gear from coming off. 2. The damper device of claim 1, wherein the damper device comprises: A part of the gear housing is disposed so as to be able to abut against at least a part of an axial end surface of the planetary gear housed in the housing portion of the case, thereby preventing the planetary gear from coming off. 2. The damper device according to 1. The gear housing accommodates the rotor and has a main body having the large-diameter gear on the outer periphery thereof, and a cap that inserts the rotating shaft of the pinion gear and is attached to an opening of the main body, 4. The damper device according to claim 3, wherein the outer peripheral edge of the cap forms a part of the gear housing for retaining the planetary gear. The planetary gear and the large-diameter gear are helical gears that mesh with each other, and are configured to generate a pressing force against the bottom surface of the case when the planetary gear moves to the rotation-permitting portion of the accommodating portion. The damper device according to any one of claims 1 to 4, wherein the damper device is Adjacent to the axial end face of the planetary gear, a disk portion having an outer diameter equal to or larger than the outer diameter of the planetary gear is provided, and the disk portion is arranged so as not to contact the engaging portion. A damper device according to any one of claims 1 to 5, wherein the damper device is configured. The planetary gear has a cylindrical portion at the center of the end face facing the bottom side of the case. The damper device according to any one of claims 1 to 6, further comprising a support groove that supports the damper movably over a distance. The damper device according to any one of claims 1 to 7, wherein the housing portion of the case is provided in a pair so as to be symmetrical with respect to a line passing through the center of rotation of the rotary damper.

Images