阅读说明：本技术 阻尼器装置 (Damper device ) 是由 细谷智幸 斋藤淳 于 2020-04-02 设计创作，主要内容包括：阻尼器装置(10)具备：基体(20)；转子(24),可旋转地支承于基体(20)；盖体(22),与基体(20)一并划分出转子(24)的容纳室；以及粘性液体,填充于容纳室。基体(20)和盖体(22)在容纳室的径向外侧划分出粘性液体的积存室,对容纳室与积存室之间进行密封。积存室因积存室的径向外侧中的基体和盖体的密封而闭塞。(A damper device (10) is provided with: a base (20); a rotor (24) rotatably supported by the base (20); a cover (22) that defines a housing chamber for the rotor (24) together with the base (20); and a viscous liquid filled in the accommodation chamber. The base body (20) and the cover body (22) define a viscous liquid reservoir on the radially outer side of the accommodation chamber, and seal the accommodation chamber and the reservoir. The storage chamber is closed by sealing the base and the cover on the radially outer side of the storage chamber.)

1. A damper device is characterized by comprising:

a substrate;

a rotor rotatably supported by the base;

a cover body that defines a rotor accommodating chamber together with the base body; and

a viscous liquid filled in the accommodation chamber,

wherein the base body and the lid body define a viscous liquid reservoir chamber radially outside the accommodation chamber,

sealing between the accommodation chamber and the accumulation chamber.

2. The damper device of claim 1,

the storage chamber is closed by sealing the base and the cover radially outside the storage chamber,

the seal on the radially outer side of the accumulation chamber has a larger amount of axial seal than the seal between the accommodation chamber and the accumulation chamber.

3. The damper device of claim 1,

the cover body has:

a first cover body that partitions the housing chamber from the base body; and

and the second cover body is fixed on the base body and prevents the first cover body from being separated.

4. The damper device of claim 3,

the first cover body is provided with a clamping part which is clamped with the base body along the axial direction in an opposite way,

the engagement portion is located between the accommodation chamber and the accumulation chamber.

5. The damper device according to claim 3 or 4,

the second lid body is fixedly attached to the base body and sealed between the accommodation chamber and the accumulation chamber, and is fixedly attached to the first lid body.

6. The damper device according to claim 4, comprising:

a first seal portion formed by fixedly attaching the second cover body and the first cover body to each other on a radially outer side of the engagement portion; and

a second seal portion formed by fixedly attaching the second cover and the base body to each other on a radially outer side of the engagement portion,

wherein the first seal portion and the second seal portion are formed continuously in an axial direction.

Technical Field

The present invention relates to a damper device filled with a viscous liquid.

Background

Patent document 1 discloses a damper including: a rotatable rotor; a housing and a cover accommodating the rotor; a damping medium filled in a rotation region of the rotor; and an enclosing section provided outside the rotation region of the rotor and communicating with the rotation region. The housing and the cover have a plurality of annular projections, and the rotor has a plurality of annular rotor projections projecting upward and downward. A rotor projection is fitted in a gap between the annular projections of the case and the lid.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-102524

Disclosure of Invention

Problems to be solved by the invention

In the technique disclosed in patent document 1, there is a possibility that the gas present in the sealed portion moves to the gap around the annular protrusion, thereby reducing the damping force.

The invention aims to provide a damper device which can stably generate damping force.

Means for solving the problems

In order to solve the above problem, a damper device according to an aspect of the present invention includes: a substrate; a rotor rotatably supported by the base; a cover body which defines a rotor accommodating chamber together with the base body; and a viscous liquid filled in the accommodation chamber. The base body and the lid body define a viscous liquid reservoir on the radially outer side of the accommodation chamber, and seal the accommodation chamber and the reservoir.

Effects of the invention

According to the present invention, it is possible to provide a damper device capable of stably generating a damping force.

Drawings

Fig. 1 is a perspective view of a damper device of an embodiment.

Fig. 2 is an exploded view of the damper device of the embodiment.

Fig. 3 is a sectional view of the damper device of the embodiment.

Fig. 4 is a diagram illustrating an assembly process of the damper device according to the embodiment.

Fig. 5 is a view showing a subsequent assembly process of the damper device of fig. 4.

Fig. 6 is a view showing a subsequent assembly process of the damper device of fig. 5.

Fig. 7 is a view showing a subsequent assembly process of the damper device of fig. 6.

Figure 8 is a partial cross-sectional view of the damper device.

Fig. 9 is an exploded view of a damper device of a first modification.

Fig. 10 is a perspective cross-sectional view of a damper device according to a first modification.

Fig. 11 is a partial enlarged view of the damper device shown in fig. 10.

Fig. 12 is a diagram for explaining an assembly process of the damper device according to the first modification.

Fig. 13 is a perspective cross-sectional view of a damper device according to a second modification.

Figure 14 is an enlarged partial view of the damper device shown in figure 13.

Fig. 15 is a diagram for explaining an assembly process of a damper device according to a second modification.

Detailed Description

Fig. 1 is a perspective view of a damper device 10 of an embodiment. The damper device 10 is mounted on, for example, a glove box (glove box) of a vehicle, and applies a damping force to an opening/closing operation of an opening/closing body (cover member) of the glove box. The damper device 10 may be mounted on a center container (container box) of a vehicle, and may apply a damping force to open and close an opening/closing body of the center container. In any case, the damper device 10 is attached to a fixed body and an opening/closing body that opens and closes an opening of the fixed body.

The damper device 10 includes a base 20, a lid 22, a rotor 24, a coupling gear 26, a seal ring (not shown), and a viscous liquid (not shown). The viscous liquid is filled between the base body 20 and the lid body 22, and applies viscous resistance to the rotation of the rotor 24. The viscous liquid is, for example, oil such as grease, and is filled so as not to leak from between the base 20 and the lid 22.

The base 20 is coupled to one of the fixed body and the opening/closing body, and the coupling gear 26 is coupled to the other of the fixed body and the opening/closing body. For example, the coupling gear 26 is coupled to the opening/closing body via a rack and pinion, and rotates in accordance with the movement of the opening/closing body, and the base 20 is coupled to the fixed body. The rotor 24 rotates together with the coupling gear 26 and receives resistance from the viscous liquid to generate a damping force. The damper device 10 is not limited to the one in which the base 20 is disposed on the lower side and the connection gear 26 is disposed on the upper side as shown in fig. 1, and may be used in a state in which the rotation axis of the rotor 24 is inclined with respect to the vertical direction.

Figure 2 is an exploded view of the damper device 10. Further, fig. 3 is a sectional view of the damper device 10. The damper device 10 shown in fig. 3 (a) and 3 (b) is different in the axial direction but in the rotational position in each of the sectional views. Fig. 2 and 3 show a state in which the viscous liquid is not filled.

The base 20 has a peripheral wall 30, a recess 32, a base inclined surface 34, an annular groove 36, an annular recessed portion 38, a tooth 40, and a coupling hole 42. Cover 22 has insertion hole 60, outer peripheral wall 62, cover inclined surface 64, and inner peripheral groove 66. The rotor 24 includes a rotation shaft 50, an inclined portion 52, a through hole 54, an annular wall 56, and a projection 58. The coupling gear 26 has a coupling hole 68.

The base body 20 is formed in a bottomed cylindrical shape. The base 20 has a bottom portion formed with a recess 32, a base inclined surface 34, and an annular groove 36. The concave portion 32 is formed as a cylindrical recess in the center of the base body 20. It is easy to load a large amount of viscous liquid in the concave portion 32 during the assembly process.

The base inclined surface 34 is formed on the inner surface of the base 20, is inclined so as to rise outward in the radial direction from the recess 32, and is inclined with respect to a surface orthogonal to the axial direction. That is, the base inclined surface 34 extends in a direction away from the bottom surface of the base 20 in the radial direction. The base inclined surface 34 is formed in a tapered shape recessed toward the recess 32 from the inner edge of the annular groove portion 36.

The annular groove 36 is formed as an annular recess continuously provided radially outside the base inclined surface 34. The annular groove portion 36 guides rotation of the rotor 24. The peripheral wall portion 30 is connected to the annular groove portion 36 and is formed to stand on the outer periphery of the base 20. A tooth 40 is formed on the outer peripheral surface of the peripheral wall 30. The teeth 40 engage with the stationary body, for example, to restrict rotation of the base body 20.

The annular recessed portion 38 is formed by recessing the upper end portion of the peripheral wall portion 30, and the annular recessed portion 38 is formed in an annular shape along the peripheral wall portion 30. Additional viscous liquid is contained in the annular recess 38. The peripheral wall portion 30 has an inner wall portion 30a and an outer wall portion 30b that radially sandwich the annular recessed portion 38. The inner wall portion 30a is set to have a lower axial height than the outer wall portion 30 b. Thereby, the viscous liquid is less likely to move radially outward than the outer wall portion 30 b. The distal end side of the inner wall portion 30a is inclined in a tapered shape so as to rise outward in the radial direction.

In the coupling hole 42, the lower surface of the base body 20 is formed in an annular shape, and engages with a projection formed on a base on which the damper device 10 is mounted. Thereby, the damper device 10 can be stably assembled. Further, the coupling hole 42 is formed radially outward of the annular groove 36 and not on the center side, and is provided at a position overlapping with the reservoir 44 when viewed in the axial direction, whereby the height of the base 20 in the axial direction can be suppressed from increasing.

The rotation shaft 50 of the rotor 24 is provided upright at the center of the rotor 24 and is formed in a columnar shape. The rotor 24 rotates about the axis of the rotating shaft 50. A flat surface to be fitted to the coupling gear 26 is formed on the side surface of the rotation shaft 50 on the tip end side. The inclined portion 52 projects radially outward from the rotating shaft portion 50, and is formed in plurality at equal intervals in the circumferential direction. As shown in fig. 2, through-holes 54 are formed between adjacent inclined portions 52. The inclined portion 52 extends so as to rise outward in the radial direction from the rotation shaft portion 50, and is inclined along the base inclined surface 34 as shown in fig. 3 (a). The inclined portion 52 is inclined with respect to a plane orthogonal to the rotation shaft portion 50, and is inclined radially outward and axially upward. The radial length of the inclined portion 52 and the through hole portion 54 is the same.

The annular wall portion 56 is formed in a cylindrical shape, is located radially outward of the plurality of inclined portions 52, and hangs down from the outer peripheral edge of the inclined portions 52. The annular wall 56 is received in the annular groove 36 of the base 20 and engages with the annular groove 36 to stabilize the rotation of the rotor 24.

The projection 58 is formed in a cylindrical shape so as to project downward from the rotation shaft 50, and is coaxial with the rotation shaft 50. An axial groove for securing a gas moving path is formed on the outer peripheral surface of the convex portion 58. By receiving the convex portion 58 in the concave portion 32 and engaging with the concave portion 32, the rotation of the rotor 24 can be stabilized.

The cover 22 sandwiches the rotor 24 with the base 20, and defines a housing chamber 70 of the rotor 24 together with the base 20. The insertion hole 60 is formed in the center of the lid 22, and exposes the rotation shaft 50 of the rotor 24 to the outside from the housing chamber 70. The rotation shaft 50 is inserted into the insertion hole 60. The outer peripheral wall portion 62 is formed in a cylindrical shape on the outer periphery of the lid body 22.

The inner peripheral groove 66 is formed inside the outer peripheral wall 62, and accommodates the peripheral wall 30 of the base body 20 and is coupled to the peripheral wall 30. The inner peripheral groove portion 66 faces the annular recessed portion 38 of the base 20. The bonding method will be described later, but the first seal portion 46 and the second seal portion 48 are formed by welding. The first seal portion 46 and the second seal portion 48 in fig. 3 (a) and 3 (b) are shown in a state where they are not melted in a state where the base 20 of the seal portion overlaps the lid 22.

The first seal portion 46 is formed on the inner peripheral surface of the peripheral wall portion 30, and the second seal portion 48 is formed on the outer peripheral surface of the peripheral wall portion 30. The reservoir 44 is formed radially outward of the housing chamber 70 and is closed by the first seal portion 46 and the second seal portion 48. The base body 20 and the lid body 22 define a viscous liquid reservoir chamber 44 radially outside the accommodation chamber 70. The reservoir 44 is formed by the peripheral wall portion 30 of the base 20 and the inner peripheral groove portion 66 of the lid 22, and the volume of the reservoir 44 is secured by the annular recessed portion 38. The reservoir 44 is formed in the circumferential direction and accommodates the viscous liquid flowing out from the accommodation chamber 70. The accommodating chamber 70 side is filled with sufficient viscous liquid, and the reservoir 44 accommodates additional viscous liquid.

The cover inclined surface 64 is formed on the inner surface of the cover 22, is inclined so as to descend radially inward, and is inclined with respect to a surface perpendicular to the axial direction. The cover inclined surface 64 is formed parallel to the inclined portion 52 and the base inclined surface 34. The inclined portion 52 of the rotor 24 is sandwiched by the base inclined surface 34 and the cover inclined surface 64. The inclined portion 52 is located in a region in the housing chamber 70 formed by the base inclined surface 34 and the lid inclined surface 64. That is, the base inclined surface 34 faces the lower surface of the inclined portion 52, and the lid inclined surface 64 faces the upper surface of the inclined portion 52, and the base inclined surface 34, the inclined portion 52, and the lid inclined surface 64 are positioned so as to overlap each other when viewed in the axial direction. Thereby, the accommodation chamber 70 is formed to stand radially outward from the position of the rotation shaft portion 50.

The seal ring 28 surrounds the rotary shaft 50, and abuts against the outer peripheral surface of the rotary shaft 50 and the inner peripheral surface of the insertion hole 60, thereby suppressing leakage of the viscous liquid in the housing chamber 70 through the insertion hole 60.

Fig. 4 is a diagram illustrating an assembly process of the damper device 10. As shown in fig. 4 (a), the discharge port of the discharge device 72 is aligned with the center of the base 20, and the discharge device 72 discharges the viscous liquid 74. As shown in fig. 4 (b), the viscous liquid 74 is carried in the center of the base body 20 and is discharged more than the amount required in the housing chamber 70. By the concave portion 32, a larger amount of the viscous liquid 74 is easily carried on the base body 20.

Fig. 5 is a view showing a subsequent assembly process of the damper device 10 of fig. 4. As shown in fig. 5 (a), the rotor 24 approaches the base 20 from above, and is mounted on the base 20 as shown in fig. 5 (b). When the rotor 24 approaches the base body 20, the convex portion 58 enters the concave portion 32 and presses the viscous liquid 74, and the viscous liquid 74 is exposed upward from the through hole 54 and rises.

The convex portion 58 of the rotor 24 is received in the concave portion 32 of the base 20 and engaged with the concave portion 32. When the concave-convex relationship between the base 20 and the rotor 24 is reversed, gas may accumulate in the concave portion of the rotor 24, and the gas accumulation can be suppressed by forming the convex portion 58 in the rotor 24. Further, by forming the base inclined surface 34 to rise along the inclined portion 52 of the rotor 24, the gas on the center side can be induced to the outside in the radial direction.

Fig. 6 is a view showing a subsequent assembly process of the damper device 10 of fig. 5. As shown in fig. 6 (a), the lid 22 approaches the base 20 side from above, and as shown in fig. 6 (b), the lid inclined surface 64 contacts the swollen viscous liquid 74, and presses and expands the viscous liquid 74. The viscous liquid 74 and the gas are induced by the lid inclined surface 64 and the inclined portion 52 to expand in the radial direction, and are induced toward the annular recessed portion 38 by the inclination. The gas in the accommodating chamber 70 is easily pushed out in the radial direction by the lid inclined surface 64 and the inclined portion 52 being inclined so as to rise in the radial direction.

Fig. 7 is a view showing a subsequent assembly process of the damper device 10 of fig. 6. As shown in fig. 7 (a), when the lid 22 approaches the base 20, the distal end of the outer peripheral wall 62 abuts against the outer wall 30b and stops approaching. At this time, the viscous liquid 74 is pressed by the cover 22 and expands toward the annular groove 36 and the annular recessed portion 38.

When the ultrasonic welding device 76 is driven in a state where the distal end of the outer peripheral wall portion 62 abuts against the outer side wall portion 30b, the abutting portion is melted and made accessible, the lid body 22 is pressed to further approach the base body 20, and the inner peripheral edge of the inner peripheral groove portion 66 abuts against the inner side wall portion 30 a. By melting the contact portion between the distal end of the outer peripheral wall portion 62 and the outer wall portion 30b to form the second seal portion 48, leakage of the viscous liquid 74 to the outside of the damper device 10 can be suppressed.

While the contact portion between the distal end of the outer peripheral wall portion 62 and the outer wall portion 30b is being melted, the contact portion between the inner peripheral edge of the inner peripheral groove portion 66 and the inner wall portion 30a starts to be melted by the ultrasonic welding device 76, and the first seal portion 46 is formed. As shown in fig. 7 (b), the communication between the housing chamber 70 and the reservoir chamber 44 is blocked by the first seal portion 46. The first seal portion 46 seals between the accommodation chamber 70 and the reservoir 44. This can restrict the return of the gas to the housing chamber 70 after the gas is pushed out to the reservoir chamber 44, and can suppress the accumulation of bubbles in the housing chamber 70 and the failure to stably exhibit the viscous resistance generated when the rotor 24 rotates. The reservoir 44 is closed from the outside by the second seal portion 48 on the radially outer side of the reservoir 44, and leakage of the viscous liquid 74 to the outside is suppressed.

As shown in fig. 7 (b), after the base 20 and the cover 22 are fixed, the coupling gear 26 is attached to the rotating shaft 50, and the assembly process of the damper device 10 is completed.

Fig. 8 is a partial cross-sectional view of the damper device 10. In fig. 8, the portion where the first seal portion 46 and the second seal portion 48 are formed is shown in a state where the base 20 and the lid 22 are overlapped, but actually the overlapped portion is melted and bonded.

As described in the assembling process, the second seal portion 48 is melted before the first seal portion 46, and welding is started. Since the second seal 48 is formed earlier than the first seal 46, the seal amount L2 of the second seal 48 is greater than the seal amount L1 of the first seal 46, and the axial length is increased. The first seal portion 46 and the second seal portion 48 are formed in an annular shape, and the axial length of the first seal portion 46 is a seal amount L1, and the axial length of the second seal portion 48 is a seal amount L2.

Thus, when the lid body 22 is pushed into the base body 20, a path for pushing out the gas from the housing chamber 70 to the reservoir chamber 44 can be secured until the pushing-in is completed. That is, during the formation of the second seal portion 48, the gas can be pressed out of the housing chamber 70. Thereby, the viscous liquid 74 is filled in the housing chamber 70 at a sufficient filling rate. Further, by starting the formation of the second seal portion 48, the leakage of the viscous liquid 74 to the outside in the step of pressing the lid body 22 can be suppressed.

Further, since the seal amount L1 of the first seal portion 46 is longer than the seal amount L2 of the second seal portion 48, the second seal portion 48 is welded from the middle of welding the first seal portion 46, both the first seal portion 46 and the second seal portion 48 are melted, and the lid body 22 is press-fitted to the base body 20 side. This enables the first seal portion 46 and the second seal portion 48 to be formed in one press-fitting step, thereby improving the work efficiency.

Since the viscous resistance generated when the rotor 24 rotates is mainly generated in the region of the annular wall portion 56, it is necessary to secure the axial lengths of the annular wall portion 56 and the annular groove portion 36 in order to generate a desired damping force. Since the inclined portion 52 stands up, even if the annular wall portion 56 hangs down from the inclined portion 52, the axial length of the entire damper device 10 can be suppressed from increasing. Further, by providing the reservoir chamber 44 at a position that does not overlap the annular wall portion 56 when viewed in the axial direction, the axial length of the annular wall portion 56 can be ensured, and the axial length of the damper device 10 can be suppressed from increasing.

By providing the reservoir chamber 44 at a position overlapping the accommodation chamber 70 when viewed in the radial direction, the axial height of the damper device 10 can be suppressed. The base inclined surface 34 extends to the annular groove portion 36, and is formed so that all portions facing the inclined portion 52 and the through hole 54 are inclined.

Fig. 9 is an exploded view of a damper device of a first modification. The damper device 100 of the first modification is different from the damper device 10 shown in fig. 2 mainly in that the cover is divided into two members.

The damper device 100 includes a base 120, a first cover 122a, a second cover 122b, a seal ring 28, and a rotor 124. The rotor 124, the seal ring 28, the first lid 122a, and the second lid 122b are mounted in this order from above on the base 120. The structure of each member will be described with reference to a new drawing.

Fig. 10 is a perspective cross-sectional view of a damper device 100 according to a first modification. Fig. 11 is a partially enlarged view of the damper device 100 shown in fig. 10. The damper device 100 further includes a first seal portion 93, a second seal portion 94, a third seal portion 95, and a fourth seal portion 96, which connect the respective members. The base 120 has a bottom portion 80, an inner sidewall portion 82a, and an outer sidewall portion 82 b.

The bottom 80 of the base 120 is also the bottom of the damper device 100, and constitutes the bottom surface of the accommodation chamber 170. The inner wall portion 82a and the outer wall portion 82b are provided standing from the bottom portion 80 and face each other. The inner side wall portion 82a is located inside the outer side wall portion 82 b. The accommodation chamber 170 is located inside the inner wall portion 82a, and the reservoir 144 is located between the inner wall portion 82a and the outer wall portion 82 b.

The rotor 124 has a rotation shaft portion 150 and an extension portion 152. The rotation shaft 150 is provided upright at the center of the rotor 124 and is formed in a columnar shape. The protruding portion 152 protrudes radially outward from the rotating shaft portion 150, and is accommodated in the accommodating chamber 170.

The first cover 122a defines the base 120 and the receiving chamber 170. The containing chamber 170 is filled with the viscous liquid 74. The second cover 122b is fixed to the base 120 to prevent the first cover 122a from falling off. Thus, after the first lid 122a closes the storage chamber 170, the second lid 122b can prevent the first lid 122a from falling off while maintaining the state where the storage chamber 170 is closed. This can reduce the amount of air remaining in the housing chamber 170.

The first cover 122a has a first annular plate 84, a first peripheral wall 86, and an engaging portion 88. The first annular plate portion 84 has an insertion hole 60 in the center, and extends radially outward from the insertion hole 60. The first annular plate portion 84 has a projecting annular rib 84a on the upper surface. The first peripheral wall portion 86 is formed in a substantially cylindrical shape so as to protrude downward from the outer peripheral edge of the first annular plate portion 84.

The engaging portion 88 is formed at the tip end portion of the first peripheral wall portion 86, and engages with the inner wall portion 82a of the base 120 in the axial direction. The engaging portion 88 is located between the accommodation chamber 170 and the reservoir 144. Thereby, the housing chamber 170 defined by the base 120 and the first cover 122a is closed.

The engaging portion 88 is formed in a convex shape protruding downward, and the tip end portion of the inner wall portion 82a is formed in a concave shape. Thus, the engaging portion 88 can be engaged with the tip end portion of the inner wall portion 82a in a concave-convex manner, and displacement of the base 120 and the first lid 122a in the radial direction can be suppressed.

The second cover 122b has a second annular plate portion 90 and a second peripheral wall portion 92. The second annular plate portion 90 has a central hole 90a extending radially outward from the central hole 90 a. The second peripheral wall portion 92 is formed in a substantially cylindrical shape so as to protrude downward from the lower surface of the second annular plate portion 90. The second peripheral wall portion 92 is located halfway in the radial range of the second annular plate portion 90. That is, the second annular plate portion 90 projects radially outward than the second peripheral wall portion 92.

The annular rib 84a enters inside the central hole 90a, and the inner circumferential region of the second annular plate portion 90 overlaps the outer circumferential region of the first annular plate portion 84 in the axial direction. The second peripheral wall portion 92 is inserted between the inner wall portion 82a and the outer wall portion 82b, and is located radially outward of the first peripheral wall portion 86.

The second peripheral wall portion 92 of the second lid 122b has a plurality of ribs 92a on the outer peripheral surface. The plurality of ribs 92a are formed to protrude from the outer peripheral surface of the second peripheral wall portion 92 so as to be separated in the circumferential direction. The rib 92a is formed along the inner circumferential surface of the outer wall portion 82 b. When the second peripheral wall portion 92 is press-fitted between the inner wall portion 82a and the outer wall portion 82b, the plurality of ribs 92a come into contact with the outer wall portion 82b, thereby stabilizing the press-fitting posture of the second lid body 122 b.

The first seal 93, the second seal 94, the third seal 95, and the fourth seal 96 shown in fig. 11 are formed by welding. In fig. 10 and 11, the sealing portion of each member is shown in a state where it is not melted by welding.

The first seal portion 93 is formed by welding the outer peripheral surface of the first peripheral wall portion 86 of the first cover 122a and the inner peripheral surface of the second peripheral wall portion 92 of the second cover 122 b. The first seal portion 93 is located between the accommodation chamber 170 and the reservoir 144 in the radial direction, and fixedly attaches the first lid body 122a and the second lid body 122 b. The first seal 93 blocks the housing chamber 170 from communicating with the outside, and seals the viscous liquid 74 from leaking from the housing chamber 170.

The second seal portion 94 is formed by welding the outer peripheral surface of the inner wall portion 82a of the base 120 and the inner peripheral surface of the second peripheral wall portion 92 of the second lid 122 b. The second seal 94 is located radially between the accommodation chamber 170 and the reservoir 144, and blocks the communication between the accommodation chamber 170 and the reservoir 144 to seal the viscous liquid 74 from leaking from the accommodation chamber 170.

The second cover 122b is fixedly attached to the base 120 by the first seal portion 93 and the second seal portion 94 and seals between the accommodation chamber 170 and the accumulation chamber 144, and is fixedly attached (welded in the embodiment) to the first cover 122 a. Thus, the first lid 122a has a function of closing the storage chamber 170, and the second lid 122b has a function of being fixed to the base 120.

The first seal portion 93 and the second seal portion 94 are connected to each other at the engagement portion 88, and are formed continuously in the axial direction on the outer side in the radial direction of the engagement portion 88. That is, the engagement portion 88 and the inner wall portion 82a are sealed vertically, and the movement of the viscous liquid 74 from between the engagement portion 88 and the inner wall portion 82a to the outside in the radial direction is restricted. Further, the second cover 122b is bonded to the first cover 122a and the base 120 by welding. The first sealing portion 93 and the second sealing portion 94 seal the position close to the housing chamber 170, thereby suppressing dispersion of the viscous liquid 74 injected in advance to various places and stabilizing the sealing amount in the housing chamber 170.

The third seal portion 95 is formed by welding the outer peripheral surface of the second peripheral wall portion 92 to the inner peripheral surface of the outer wall portion 82 b. The third seal 95 is located outside the reservoir 144, and seals the leakage of the viscous liquid 74 from the reservoir 144. The third sealing portion 95 bonds the second lid 122b to the base 120.

The fourth seal portion 96 is formed by welding the outer peripheral surface of the first annular plate portion 84 and the inner peripheral surface of the second peripheral wall portion 92. The fourth seal portion 96 seals the viscous liquid 74 from leaking from the gap between the first cover 122a and the second cover 122 b. The fourth sealing portion 96 couples the first cover 122a and the second cover 122 b.

The first seal 93 and the fourth seal 96 can seal the viscous liquid 74 from leaking between the first lid 122a and the second lid 122 b. Further, the second seal portion 94 and the third seal portion 95 can double seal the viscous liquid 74 from leaking between the second lid 122b and the base 120.

Fig. 12 is a diagram for explaining an assembly process of the damper device 100 according to the first modification. The viscous liquid 74 is carried in the center of the base 120, the rotor 124 is carried in the base 120, and the first lid 122a is pressed from above toward the base 120. Thereby, the viscous liquid 74 is pushed out toward the reservoir portion 144 through the gap between the engaging portion 88 and the inner wall portion 82 a.

Then, the first cover 122a approaches the base 120, and as shown in fig. 12 (a), the engagement portion 88 of the first cover 122a is engaged with the distal end portion of the inner wall portion 82a of the base 120. The accommodation chamber 170 is closed by the engagement of the engagement portion 88 with the inner wall portion 82a, and the movement of the viscous liquid 74 is restricted.

In a state where the housing chamber 170 is closed, a process of welding the second lid 122b is performed. This suppresses the viscous liquid 74 from being compressed in the housing 170 by the second lid 122b being pushed in. The second lid 122b is moved closer to the base 120 with the second peripheral wall 92 positioned between the inner wall 82a and the outer wall 82 b. The distal end of the second peripheral wall portion 92 abuts an inclined surface 97 formed on the outer peripheral surface of the first annular plate portion 84. The inclined surface 97 is inclined so as to extend radially outward downward, and extends radially outward from the inner peripheral surface of the second peripheral wall portion 92. That is, when the second peripheral wall portion 92 is press-fitted into the outer periphery of the first annular plate portion 84, it is always in contact with the inclined surface 97.

In a state where the second peripheral wall portion 92 is in contact with the inclined surface 97 of the first annular plate portion 84, the ultrasonic welding device 76 is driven to melt the contact portion, and the second cover 122b is further brought close to the base 120.

Fig. 12 (b) shows a state where the second lid 122b is press-fitted into the base 120 and the inner peripheral surface of the second peripheral wall portion 92 and the outer peripheral surface of the first peripheral wall portion 86 are melted, and the first seal portion 93 starts to be formed. The second peripheral wall portion 92 comes into contact with the engagement portion between the engagement portion 88 and the inner wall portion 82a and starts to melt, and the housing chamber 170 is sealed. By melting the engagement portion between the engagement portion 88 and the inner wall portion 82a, the communication between the accommodation chamber 170 and the reservoir 144 can be reliably blocked.

In fig. 12 (b), the inner peripheral surface of the second peripheral wall portion 92 on the base end side abuts against the outer peripheral edge of the first annular plate portion 84, and the outer peripheral surface of the second peripheral wall portion 92 on the base end side abuts against the inner peripheral edge of the outer wall portion 82b on the tip end side. The abutted portions are melted by the ultrasonic welding device 76.

In fig. 12 (c), the press-fitting of the second cover 122b is completed, and the first seal 93, the second seal 94, the third seal 95, and the fourth seal 96 are formed, and the assembly of the damper device 100 is completed. The first seal 93 is formed, the second seal 94 is formed, and the third seal 95 and the fourth seal 96 are formed. By welding from the first seal 93 and the second seal 94, the housing chamber 170 can be sealed, and then the reservoir 144 can be sealed. Note that the welding start timings of the second seal portion 94, the third seal portion 95, and the fourth seal portion 96 may be the same.

Fig. 13 is a perspective cross-sectional view of a damper device 200 according to a second modification. Fig. 14 is a partially enlarged view of the damper device 200 shown in fig. 13. In the damper device 200 of the second modification, the first seal 293 and the second seal 294 are located at different positions from each other, and the first seal 293 and the second seal 294 are located above the first seal 93 and the second seal 94 of the damper device 100, as compared with the damper device 100 of the first modification shown in fig. 10.

The damper device 200 includes a base 220, a first cover 222a, a second cover 222b, a rotor 124, a first seal portion 293, a second seal portion 294, and a third seal portion 295. The base 220 has a bottom portion 80, an inner sidewall portion 282a, and an outer sidewall portion 282 b.

The inner wall portion 282a and the outer wall portion 282b are provided standing from the bottom portion 80 and opposed to each other. The inner wall portion 282a is located inside the outer wall portion 282 b. The accommodation chamber 170 is located inside the inner wall portion 282a, and the reservoir 244 is located between the inner wall portion 282a and the outer wall portion 282 b. The inner wall portion 282a is provided to rise so as to cover the outer periphery of the storage chamber 170, and rises above the protruding portion 152. By forming the inner wall portion 282a high, the reservoir 244 can be enlarged.

The first cover 222a is formed in a substantially disk shape and has an insertion hole 60 at the center. The engaging portion 288 of the first cover 222a is formed on the lower surface on the outer peripheral side and engages with the inner wall portion 282a of the base 220 in the axial direction.

The second cover 222b has a second annular plate 290 and a peripheral wall 292. The second annular plate portion 290 extends radially outward. The peripheral wall 292 is formed in a substantially cylindrical shape so as to protrude downward from the lower surface of the second annular plate 290.

Fig. 15 is a diagram for explaining an assembly process of the damper device 200 according to the second modification. As shown in fig. 15 (a), the engaging portion 288 of the first cover 222a is engaged with the distal end portion of the inner wall portion 282a of the base 220, and the step of welding the second cover 222b is performed with the housing chamber 170 closed. This can suppress the viscous liquid 74 from being compressed in the housing 170 by the second lid 222b being pushed in.

The second cover 222b is moved closer to the base 220 with the peripheral wall 292 positioned between the inner wall 282a and the outer wall 282 b. The distal end of the peripheral wall 292 abuts against an inclined surface 297 formed on the outer peripheral surface of the first cover 222 a. The contact portion is melted by the ultrasonic welding device 76.

Fig. 15 (b) shows a state where the second cover 222b is press-fitted into the base 220 and the inner peripheral surface of the peripheral wall 292 and the outer peripheral surface of the first cover 222a are melted, thereby starting to produce the first seal 293. The peripheral wall 292 comes into contact with the engagement portion between the engagement portion 288 and the inner wall 282a and starts to melt, and the housing chamber 170 is sealed.

In fig. 15 (b), the outer peripheral surface of the peripheral wall portion 292 on the proximal end side abuts against the inner peripheral edge of the outer wall portion 282b on the distal end side. In fig. 15 (c), the pressing of the second cover 222b is completed, and the first seal portion 293, the second seal portion 294, and the third seal portion 295 are formed, and the damper device 200 is assembled. The accommodating chamber 170 can be sealed by first starting welding from the first seal 293 and the second seal 294, and then the reservoir 244 can be sealed.

The present invention is not limited to the above-described embodiments, and various modifications such as design changes may be applied to the embodiments based on the knowledge of those skilled in the art, and the embodiments to which such modifications are applied are also included in the scope of the present invention.

In the embodiment, the fixing member or the opening/closing member is coupled to the tooth portion 40 formed on the base substrate 20, but the present invention is not limited thereto. For example, a flange-like attachment portion having a screw fastening hole may be formed. In any case, when the connecting gear 26 is connected to the opening/closing body, the base 20 is connected to the fixed body in a state in which rotation is restricted.

Further, in the embodiment, a scheme in which the first sealing portion 46 and the second sealing portion 48 are formed by welding is shown, but is not limited to this scheme. For example, the second seal portion 48 may be formed by bonding or mechanical bonding, and the first seal portion 46 may be formed by mechanical bonding, for example, using a gasket. The ultrasonic welding may be performed by other methods such as vibration welding and laser welding. Similarly to the first seal portion 46 and the second seal portion 48, the first seal portion 93, the second seal portion 94, the third seal portion 95, and the fourth seal portion 96 are not limited to those formed by welding, and may be formed by adhesion or mechanical bonding. In either case, these seals secure the components to one another to limit movement of the viscous liquid 74. That is, the fixed attachment includes welding, bonding, and the like.

In the embodiment, the base inclined surface 34 and the cover inclined surface 64 are parallel to the inclined portion 52 of the rotor 24, but the present invention is not limited thereto, and may be non-parallel. In any case, the base inclined surface 34, the lid inclined surface 64, and the inclined portion 52 are inclined so as to rise outward in the radial direction, and are inclined with respect to the surface orthogonal to the rotation shaft portion 50, whereby the viscous liquid 74 is induced into the accumulation chamber 44.

Industrial applicability

The present invention relates to a damper device filled with a viscous liquid.

Description of reference numerals:

10 a damper device; 20 a substrate; 22a cover body; 24 a rotor; 26 connecting gears; 28, sealing rings; 30 peripheral wall parts; 30a inner wall portion; 30b outer side wall portions; 32 concave parts; 34 a substrate inclined surface; 36 an annular groove portion; 38 an annular recess; 40 tooth parts; 42 a connecting hole part; 44 an accumulation chamber; 46 a first seal portion; 48 a second seal portion; 50 a rotation shaft portion; 52 an inclined portion; 54 a through hole portion; 56 an annular wall portion; 58 convex parts; 60 inserting through holes; 62 an outer peripheral wall portion; 64 cover body inclined plane; 66 inner peripheral groove portions; 68 a linking hole; 70 a housing chamber; 72 a discharge device; 74 a viscous liquid; 76 ultrasonic welding means; 88 a clamping part; 93 a first seal portion; 94 a second seal portion; 122a first cover body; 122b second cover.