JP6263003B2 - Rotary damper - Google Patents

Description

  The present invention relates to a rotary damper.

  2. Description of the Related Art Conventionally, a rotary damper includes a housing and a shaft that is pivotally supported by the housing and is rotatable about its own axis, and generates a damping force that suppresses the rotation of the shaft. When a rotary damper is used for a vehicle suspension, it is common to fix the housing to the vehicle body and connect the shaft to the wheel via a link mechanism. It has been converted to movement.

  Here, the swingable arm constituting the link mechanism has a structure that can move to some extent other than the swing direction by the bending of the bush. For this reason, when the rotary damper is used for a vehicle suspension and an external force is input to the rotary damper via the wheel and the link mechanism, the shaft of the rotary damper has an axial direction other than the rotation direction of the shaft. The force of will act.

  Conventionally, the housing of the rotary damper and the vehicle body are rigidly coupled by bolts (for example, Patent Document 1), and the shaft and the link mechanism are rigidly coupled by serration fitting (for example, Patent Document 2), and the shaft Unable to absorb direction force. For this reason, in the rotary damper disclosed in Patent Document 2, a side plate having excellent wear resistance is interposed between a vane fixed to the shaft and a side panel that pivotally supports the shaft. It receives the axial force input to.

JP-A-9-303466 JP 2012-197861 A

  However, as described above, when the shaft rotates while receiving an axial force, the vane rotates while being pressed against the side plate with a high pressure, so an increase in friction is inevitable. Such an increase in friction due to an external force acting in the axial direction of the shaft occurs regardless of the presence or absence of the side plate.

  In particular, as disclosed in Patent Document 2, when a DLC (diamond-like carbon) film is formed on a side plate, it is necessary to use a highly rigid and expensive material as a base material for forming the film. The side plate becomes expensive, and thus the rotary damper becomes expensive.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotary damper that can reduce friction when the shaft rotates and can be made inexpensive.

Means for solving the above problems, housing and, Rutotomoni a rotatable shaft to the own axis is supported in the housing, the rotary damper for generating a damping force for restricting the rotation of the shaft, the An attachment device for connecting the housing to the vehicle body, the attachment device comprising: a first plate fixed to one of the vehicle body or the housing; a second plate fixed to the other of the vehicle body or the housing; One or more elastically deformable cushion members interposed between the one plate and the second plate, and the cushion member is more rigid than the force input in the axial direction of the shaft. That is, the rigidity with respect to the force input in the direction of rotating the shaft is set to be higher.

  According to the rotary damper of the present invention, it is possible to reduce the friction when the shaft rotates and to reduce the cost.

It is the figure which showed the rotary damper which concerns on one embodiment of this invention, and shows the XX sectional view of FIG. It is the side view which notched and showed the rotary damper which concerns on one embodiment of this invention.

  A rotary damper according to an embodiment of the present invention will be described below with reference to the drawings. The same reference numerals given throughout the several drawings indicate the same or corresponding parts. The drawings are viewed in the direction of the reference numerals.

  As shown in FIGS. 1 and 2, the rotary damper R according to the present embodiment includes a housing 1 and a shaft 2 that is pivotally supported by the housing 1 and is rotatable about its own axis. Generates damping force to suppress. Furthermore, the rotary damper R includes a mounting device A that connects the housing 1 to the vehicle body, and the mounting device A includes one or more cushion members 3A, 3B, 3C, and 3D that can be elastically deformed. The cushion members 3A, 3B, 3C, 3D are input in the direction in which the shaft 2 is rotated rather than the rigidity against the force (external force F1) input in the axial direction (front-rear direction in FIG. 1) of the shaft 2. The rigidity with respect to the force (external force F2) is set to be higher.

  Hereinafter, the rotary damper R according to the present embodiment will be described in detail. The rotary damper R is used for a vehicle suspension, includes a housing 1 and a shaft 2, a shock absorber body D that generates a damping force, and a housing 1. Is attached to the cross member of the vehicle body B. A serration 2a is provided at the tip of the shaft 2 protruding from the housing 1, and the serration 2a is connected to a link mechanism (not shown) coupled to the wheels. Since this link mechanism converts the vertical motion of the wheel into the rotational motion of the shaft 2, when an impact due to road surface unevenness is input to the wheel, the shaft 2 rotates about its own axis while being supported by the housing 1. It has become. Rotating around this axis means rotating around this axis about the center line 2x of itself (shaft).

  The configuration of the shock absorber body D may be any configuration as long as it includes the shaft 2 and the housing 1 and can generate a damping force that suppresses rotation of the shaft 2 around its own axis. An example will be described. As described above, the shock absorber main body D includes the housing 1 and the shaft 2, and the vane 4 that stands on the outer periphery of the shaft 2 along the axial direction. The one chamber L1 and the other chamber L2 that are partitioned and filled with hydraulic oil, the flow path 5 that communicates with the one chamber L1 and the other chamber L2, and the damping that provides resistance to the flow of hydraulic oil that passes through the flow path 5 A valve V and an accumulator (not shown) that compensates for a change in volume of the hydraulic oil due to a temperature change are provided. A fluid other than hydraulic oil may be used as long as a damping force can be generated.

The housing 1 includes a cylindrical case 10 in which a shaft 2 is inserted to form a space between the shaft 2 and a pair of side plates 11 that are similarly inserted in the shaft 10 and stacked on both sides in the axial direction of the case 10. , 12 and a pair of side panels 13, 14 that are stacked on the opposite side of the side plates 11, 12 and support the shaft 2. The case 10, the side plates 11, 12 and the side panels 13, 14 penetrate the side panel 13 and the side plate 11 from the outside of the housing 1 and are screwed into the left part of the case 10 in FIG. And a plurality of bolts 16 that penetrate the side panel 14 and the side plate 12 from the outside of the housing 1 and are screwed into the right portion of the case 10 in FIG.

  On the inner periphery of the case 10, a pair of partition walls 10 a and 10 b that protrudes toward the shaft 2 opposite to each other and extends along the axial direction of the shaft 2 are provided, and are formed between the case 10 and the shaft 2. Are divided into two fan-shaped pressure chambers P1 and P2. These pressure chambers P1 and P2 are filled with hydraulic oil, respectively. Further, the partition walls 10a and 10b are respectively attached with U-shaped seals 17 which are in close contact with both side plates 11 and 12 and slidably contact the outer peripheral surface of the shaft 2, so that the partition walls 10a and 10b and the shaft 2 and between the partition walls 10a and 10b and the side plates 11 and 12, the hydraulic oil is prevented from moving between the two pressure chambers P1 and P2.

  The side plates 11 and 12 stacked on both sides of the case 10 have a disk shape that is thinner than the side panels 13 and 14, respectively, and insertion holes 11 a and 12 a that allow the shaft 2 to pass therethrough in the center. Is formed. Moreover, the side plates 11 and 12 are provided in order to slidably contact the vane 4 and protect the side panels 13 and 14, and have a property excellent in wear resistance from the viewpoint of wear resistance. Further, O-rings 18 are provided along the circumferential direction of the side plate 11 on the left and right sides in FIG. 2 of one side plate 11, respectively, between the side plate 11 and the case 10, and the side plate 11. And the side panel 13 are closed. Similarly, O-rings 19 are provided on the left and right sides of the other side plate 12 in FIG. 2 along the circumferential direction of the side plate 12, respectively, between the side plate 12 and the case 10, and the side plate. 12 and the side panel 14 are closed.

  One side panel 13 sandwiching one side plate 11 between the case 10 and the other side panel 14 sandwiching the other side plate 12 between the case 10 are both made of a light material such as aluminum. Thus, the total weight of the rotary damper R can be reduced.

  One side panel 13 has a cylindrical shape, a shaft holding portion 13a through which the left portion of the shaft 2 in FIG. 2 is inserted, and a flange-like cap portion 13b projecting outward from the right end of the shaft holding portion 13a in FIG. It has. On the inner periphery of the shaft holding portion 13a, an annular dust seal 20, an annular oil seal 21, a cylindrical bearing 22, and an annular side seal 23 are held side by side in the axial direction from the opposite case side. ing. The dust seal 20 slidably contacts the outer peripheral surface of the shaft 2 to prevent dust and dirt from entering the housing 1, and the oil seal 21 similarly slidably contacts the outer peripheral surface of the shaft 2 and the hydraulic oil in the housing 1 flows out. To prevent. Further, since the side seal 23 closes the space between the shaft 2 and the side plate 11, one side panel 13 supports the left portion of the shaft 2 in FIG. However, the left opening in FIG. 2 of the space formed between the case 10 and the shaft 2 can be closed. Further, the bolt 15 is inserted into the cap portion 13b, and the O-ring 18 is in close contact with the right side surface in FIG.

  In the case of this embodiment, the other side panel 14 has a bottomed cylindrical shape, and a shaft holding portion 14a into which the right portion in FIG. 2 of the shaft 2 is inserted, and from the left end in FIG. 2 of the shaft holding portion 14a. And a flange-like cap portion 14b projecting outward. On the inner periphery of the shaft holding portion 14a, an annular oil seal 24, a cylindrical bearing 25, and an annular side seal 26 are held side by side in the axial direction from the opposite case side. The bottom of the shaft holding portion 14a prevents dust and dirt from entering the housing 1, and the oil seal 24 slides against the outer peripheral surface of the shaft 2 to prevent the hydraulic oil in the housing 1 from flowing out. Further, since the side seal 26 closes the space between the shaft 2 and the side plate 12, the other side panel 14 pivotally supports the right portion of the shaft 2 in FIG. However, the right side opening in FIG. 2 of the space formed between the case 10 and the shaft 2 can be closed. Further, the bolt 16 is inserted into the cap portion 14b, and the O-ring 19 is in close contact with the left side surface in FIG. In the present embodiment, since the shaft holding portion 14a is formed in a bottomed cylindrical shape, no dust seal is provided, but like the one side panel 13, the shaft holding portion 14a is formed in a cylindrical shape. The shaft 2 may be passed through and a dust seal may be provided.

  The shaft 2 protrudes from the housing 1 on the left side in FIG. 2 and is connected in order from the protruding end to the right side in FIG. 2, and is arranged on the same axis, the serration 2a, the first shaft portion 2b, and the first shaft. An enlarged diameter part 2c having an outer diameter larger than that of the part 2b and a second shaft part 2d having an outer diameter smaller than that of the enlarged diameter part 2c are provided. The dust seal 20, the oil seal 21 and the bearing 22 held by one side panel 13 are in sliding contact with the outer peripheral surface of the first shaft portion 2b, and the step surface at the boundary between the first shaft portion 2b and the enlarged diameter portion 2c. The side seal 23 is in sliding contact, the oil seal 24 and the bearing 25 held by the other side panel 14 are in sliding contact with the outer peripheral surface of the second shaft portion 2d, and the step at the boundary between the second shaft portion 2d and the enlarged diameter portion 2c. A side seal 26 is in sliding contact with the surface. The enlarged diameter portion 2c is accommodated in the case 10, and the seals 17 of the partition walls 10a and 10b are in sliding contact with the outer peripheral surface of the enlarged diameter portion 2c, and the outer periphery of the enlarged diameter portion 2c, The pressure chambers P1 and P2 are formed between the partition walls 10a and 10b, respectively.

  A pair of vanes 4 erected along the axial direction on the outer periphery of the shaft 2 are provided on the outer periphery of the enlarged diameter portion 2c with an angle of 180 degrees in the circumferential direction, and one vane 4 is connected to one pressure chamber P1. While partitioning into one room p10 and p11, the other vane 4 partitions the other pressure chamber P2 into two rooms p20 and p21. The vane 4 is attached with a U-shaped seal 40 that is in sliding contact with both side plates 11 and 12 and that is in sliding contact with the inner peripheral surface of the case 10, and between the vane 4 and the case 10, and the vane 4. The hydraulic oil is prevented from moving between the two chambers (p10 and p11, p20 and p21).

  When the shaft 2 rotates in the clockwise direction in FIG. 1, the two chambers p10 and p20, which are positioned in the direction of travel of the vanes 4 and 4 and are diagonally arranged, pass through one passage 2e formed in the shaft 2. It communicates and constitutes one room L1. In addition, when the shaft 2 rotates counterclockwise in FIG. 1, two chambers p11 and p21, which are positioned in the traveling direction of the vanes 4 and 4 and are diagonally arranged, are formed in the shaft 2 and the one side The other chamber L2 is configured to communicate with the other passage 2f arranged so as not to intersect the passage 2e. That is, the one chamber L1 and the other chamber L2 are partitioned by a pair of vanes 4 and 4, and when the shaft 2 rotates clockwise in FIG. 1, when the one chamber L1 is reduced and rotates counterclockwise, the other The chamber L2 is reduced. The one chamber L1 and the other chamber L2 communicate with each other via a flow path 5. A damping valve V that provides resistance to the flow of hydraulic oil passing through the flow path 5 is provided in the middle of the flow path 5. Is provided.

  With the above configuration, when the shaft 2 rotates clockwise in FIG. 1 by the input of an external force, the hydraulic oil in the one chamber L1 that is reduced moves to the other chamber L2 that expands through the flow path 5, and the opposite In addition, when the shaft 2 rotates counterclockwise in FIG. 1, the hydraulic oil in the other chamber L2 to be reduced moves to the one chamber L1 that expands through the flow path 5. For this reason, with the rotation of the shaft 2 around its own axis, the shock absorber body D generates a damping force due to the resistance of the damping valve V when the hydraulic oil passes through the flow path 5. Rotation can be suppressed. As described above, the configuration of the shock absorber body D is not limited to the above. For example, the flow path 5 and the damping valve V may be attached to the housing 1 or provided in the shaft 2. Also, the configuration of the damping valve V can be changed as appropriate, a damping valve that provides resistance to the flow of hydraulic fluid moving from the one chamber L1 to the other chamber L2, and an operation that moves from the other chamber L2 to the one chamber L1. A damping valve that provides resistance to the flow of the liquid may be separated so that the damping force generated by the shock absorber body D can be changed according to the rotation direction of the shaft 2.

  Subsequently, the attachment device A for connecting the housing 1 of the shock absorber main body D to the vehicle body B is arranged along the center line 2x of the shaft 2 and in the horizontal direction on both sides of the center line 2x in the present embodiment. A pair of first plates 6A, 6B, and the first plates 6A, 6B are arranged opposite to each other, and are arranged along the center line 2x of the shaft 2 and in the horizontal direction on both sides of the center line 2x. A plurality of cushion members 3A interposed between the pair of second plates 7A and 7B, the first plate 6A and the second plate 7A facing each other, and the first plate 6B and the second plate 7B facing each other. 3B, 3C, 3D.

  The first plates 6 </ b> A and 6 </ b> B are plate-like members arranged along the center line 2 x of the shaft 2. The first plate 6 </ b> A and 6 </ b> B is fixed to the vehicle body B with a bolt 60. A first extending piece 62 that is fixed to the vehicle body B and extends in the vertical direction, and an intermediate piece 63 that extends in the horizontal direction from the lower end serving as a free end of the first extending piece 62 to the opposite side of the fixed piece 61. Yes. In the present embodiment, the first plates 6A and 6B are formed by bending a single metal plate base material to form a fixed piece 61, a first extending piece 62, and an intermediate piece 63. It is simple. In addition, the raw material and formation method of 1st plate 6A, 6B can be changed suitably, For example, you may form a 1st plate 6A, 6B by couple | bonding several plate bodies by welding etc.

  The second plates 7 </ b> A and 7 </ b> B are also plate-like members arranged along the center line 2 x of the shaft 2, and a fixed clamping piece 71 fixed to the housing 1 with a bolt 70 and a lower end to the fixed clamping piece 71. A second extending piece 72 that is fixed and extends in the vertical direction, and an opposing holding piece 73 that extends in the horizontal direction while facing the fixed holding piece 71 from the upper end that is the free end of the second extending piece 72 are provided. . In the present embodiment, both the second plates 7A and 7B also bend a single metal plate base material to form a fixed clamping piece 71, a second extending piece 72, and an opposing clamping piece 73, Processing is simple. In addition, the raw material and formation method of 2nd plate 7A, 7B can be changed suitably, for example, you may form several plate body by welding etc. and form 2nd plate 7A, 7B.

  The pair of first plates 6A and 6B and the pair of second plates 7A and 7B are arranged symmetrically in FIG. 1, and the fixed clamping piece 71 of the second plates 7A and 7B arranged back to back. Between the opposing clamping pieces 73, intermediate pieces 63 of the first plates 6A and 6B arranged to face each other are inserted. Further, the first plate 6A and the second plate 7A arranged in the vertical direction, the first plate 6B and the second plate 7B are not in direct contact with each other, and the tip 63a of the intermediate piece 63 and the second extending piece 72 are not in contact with each other. A gap is formed between the front end 73a of the opposing sandwiching piece 73 and the first extending piece 62.

  The cushion members 3A, 3B, 3C, and 3D are made of elastically deformable rubber, and are provided at four locations in the present embodiment. Specifically, the cushion member 3A interposed between the opposing sandwiching piece 73 and the intermediate piece 63 of the first and second plates 6A and 7A arranged on the left and right sides in FIG. The cushion member 3B interposed between the sandwiching piece 71 and the opposing sandwiching piece 73 and the intermediate piece 63 of the first and second plates 6B and 7B arranged on the right and left sides in FIG. There is a cushion member 3 </ b> C, and a cushion member 3 </ b> D interposed between the intermediate piece 63 and the fixed clamping piece 71. 1 between the left cushion member 3A, 3B and the second extension piece 72 on the left side, and between the right cushion member 3C, 3D and the second extension piece 72 on the right side in FIG. Each of the cushion members 3A, 3B, 3C, and 3D is allowed to be elastically deformed. In addition, the position which provides the clearance gap which accept | permits elastic deformation of cushion member 3A, 3B, 3C, 3D can be changed suitably.

  The left cushion members 3A and 3B in FIG. 1 are bonded to the first and second plates 6A and 7A on the left side in FIG. 1, and the right cushion members 3C and 3D in FIG. The first and second plates 6B and 7B are bonded. That is, since all the cushion members 3A, 3B, 3C, 3D are bonded to both the first plates 6A, 6B and the second plates 7A, 7B sandwiching the cushion members 3A, 3B, 3C, 3D, respectively. 2 is suppressed in the horizontal direction in FIG. 2 between the cushion members 3A and 3B and the first and second plates 6A and 7A, and the left and right sides in FIG. 2 between the cushion members 3C and 3D and the first and second plates 6B and 7B are suppressed. Directional deviation is suppressed.

  Hereinafter, the operation of the rotary damper R according to the present embodiment will be described.

  When an external force F2 is input in a direction in which the shaft 2 is rotated clockwise in FIG. 1, the left fixed clamping piece 71 in FIG. 1 tends to approach the intermediate piece 63 and the right opposing clamping piece 73 in FIG. 1 approaches the intermediate piece 63, so that a compressive force (force to be compressed) acts on the lower left cushion member 3B in FIG. 1 and the upper right cushion member 3C in FIG. On the contrary, when the external force F2 is input in the direction in which the shaft 2 is rotated counterclockwise in FIG. 1, the opposing holding piece 73 on the left side in FIG. 1 tries to approach the intermediate piece 63, and the right side in FIG. Since the fixed clamping piece 71 tends to approach the intermediate piece 63, a compressive force acts on the upper left cushion member 3A in FIG. 1 and the lower right cushion member 3D in FIG.

  That is, when the external force F2 is input in the direction in which the shaft 2 is rotated, the two cushion members (3A and 3D, or 3B and 3C) arranged on the diagonal line are used regardless of the rotation direction. It is designed to be compressed. The cushion members 3A, 3B, 3C, 3D are made of rubber, and the rubber has high rigidity against the compressive force, so that the rigidity of the cushion members 3A, 3B, 3C, 3D with respect to the external force F2 can be increased. Therefore, the external force F2 can be easily transmitted to the shaft 2, the shaft 2 can be rotated by receiving the input of the external force F2, and the rotary damper R can generate a damping force.

  On the other hand, when the external force F1 is input in the axial direction of the shaft 2, the first plates 6A and 6B and the second plates 7A and 7B tend to shift in the left-right direction in FIG. A shearing force acts on 3A, 3B, 3C, 3D. Since the rubber forming the cushion members 3A, 3B, 3C, 3D has low rigidity against the shearing force, the rigidity of the cushion members 3A, 3B, 3C, 3D with respect to the external force F1 can be reduced. For this reason, friction can be reduced by absorbing the external force F1 acting on the shaft 2 and reducing the pressure applied to the side plates 11 and 12.

  Further, since all the cushion members 3A, 3B, 3C, 3D are bonded to the corresponding first plates 6A, 6B and the second plates 7A, 7B, the shearing force acts, Even if the two plates (6A and 7A, 6B and 7B) are temporarily shifted to the left and right in FIG. 2, it is possible to prevent the two plates from returning to the original positions.

  Hereinafter, the effect of the rotary damper R according to the present embodiment will be described.

  In the present embodiment, the cushion members 3A, 3B, 3C, 3D are both the first plate and the second plate (6A and 7A or 6B and 7B) sandwiching the cushion members 3A, 3B, 3C, and 3D, respectively. It is glued to.

  According to the above configuration, when the external force F1 is input in the axial direction of the shaft 2 and the first plate and the second plate (6A and 7A or 6B and 7B) facing each other are shifted, they are not returned to their original positions while being shifted. It becomes possible to prevent this.

  In addition, the displacement of the cushion members 3A, 3B, 3C, 3D and the first plate and the second plate (6A and 7A or 6B and 7B) sandwiching the cushion members 3A, 3B, 3C, and 3D is prevented by a method other than adhesion. For example, the stoppers may be raised at the left and right ends of the first plates 6A and 6B and the second plates 7A and 7B in FIG.

  In the present embodiment, the attachment device A includes a pair of first plates 6A and 6B that are arranged along the center line 2x of the shaft 2 and horizontally arranged on both sides of the center line 2x, and these first plates 6A. , 6B and a pair of second plates 7A, 7B arranged in a horizontal direction on both sides of the center line 2x along the center line 2x.

  Each of the first plates 6A and 6B includes a first extending piece 62 having one end fixed to the vehicle body and extending in the vertical direction, and an intermediate piece 63 extending in the horizontal direction from the other end of the first extending piece 62. At the same time, the second plates 7A and 7B include a fixed holding piece 71 fixed to the housing 1, a second extending piece 72 having one end fixed to the fixed holding piece 71 and extending in the vertical direction. An opposing sandwiching piece 73 extending in the horizontal direction while facing the fixed sandwiching piece 71 from the other end of the two extending pieces 72 is provided.

In the first plate and the second plate (6A and 7A, 6B and 7B) facing each other, the intermediate piece 63 is inserted between the fixed sandwich piece 71 and the opposed sandwich piece 73, respectively, and the fixed sandwich The cushion members 3A, 3B, 3C, and 3D are interposed between the piece 71 and the intermediate piece 63, and between the opposing holding piece 73 and the intermediate piece 63 , respectively.

  According to the above configuration, when an external force F1 is input in the axial direction of the shaft 2, a shearing force acts on the cushion members 3A, 3B, 3C, and 3D, and an external force F2 is input to the shaft 2 in the rotational direction. A compressive force acts on the cushion member (3A, 3D or 3B, 3C) on both the left and right sides in FIG. 1 of the center line 2x of the shaft 2. Since the rubber that is the material of the cushion members 3A, 3B, 3C, and 3D has a property that the rigidity against the shearing force is low and the rigidity against the compression force is high, the cushion members 3A, 3B, 3C, and 3D against the external force F1 It is easier to increase the rigidity of the cushion members 3A, 3B, 3C, and 3D with respect to the external force F2 than the rigidity.

  When the external force F1 is input, a shearing force is applied to the cushion members 3A, 3B, 3C, and 3D. When the external force F2 is input, a compressive force is applied to the cushion members 3A, 3B, 3C, and 3D. The configuration is not limited to the above, and can be changed as appropriate.

  In the present embodiment, both the first plates 6A and 6B are fixed to the vehicle body B, and the second plates 7A and 7B are both fixed to the housing 1. However, the present invention is not limited to this, and the first plates 6A and 6B. One of the plates may be fixed to the vehicle body B, the other may be fixed to the housing 1, one of the second plates 7A and 7B may be fixed to the housing 1, and the other may be fixed to the vehicle body B, and both the first plates 6A and 6B may be fixed. While fixing to the housing 1, you may fix both 2nd plates 7A and 7B to the vehicle body B. FIG.

  In the present embodiment, one end of the first extending piece 62 is connected to the fixing piece 61, and the fixing piece 61 is fixed to the vehicle body B with the bolt 60, so that one end of the first extending piece 62 is attached to the vehicle body. Although fixed, the fixing method is not limited to this, and for example, one end of the first extending piece 62 may be fixed by welding, adhesion, or the like. Similarly, the fixed clamping piece 71 is fixed to the housing 1 with the bolt 70, but the fixing method is not limited to this. For example, the fixed clamping piece 71 may be fixed by welding, adhesion, or the like.

In the present embodiment, the cushion members 3A, 3B, 3C, 3D are made of rubber, and when a force (external force F1) is input in the axial direction of the shaft 2, a shearing force acts to rotate the shaft 2. When a force (external force F2) is input in the direction to be applied, the rubber is set so that a compressive force acts. Rubber has a low rigidity against a shear force and a high rigidity against a compressive force. For example, in the cushion members 3A, 3B, 3C, 3D, the rigidity with respect to the force (external force F2) input in the direction in which the shaft 2 is rotated is greater than the rigidity with respect to the force (external force F1) input in the axial direction of the shaft 2. It is easy to set high.

  The configuration for setting the rigidity of the cushion members 3A, 3B, 3C, and 3D as described above can be changed as appropriate, and may be realized by, for example, a rubber composition. Also, the rubber composition, cushion members 3A, 3B, 3C, 3D are formed with long holes in the left-right direction in FIG. 2, or the cushion members 3A, 3B, 3C, 3D are lengthened in the left-right direction in FIG. By doing so, it may be possible to help achieve the rigidity.

  Further, in the present embodiment, the rotary damper R includes a mounting device A that connects the housing 1 to the vehicle body, and the mounting device A includes one or more cushion members 3A, 3B, 3C, and 3D that are elastically deformable. I have. The cushion members 3A, 3B, 3C, 3D are more rigid with respect to a force (external force F2) input in the direction in which the shaft 2 is rotated than with respect to a force (external force F1) input in the axial direction of the shaft 2. Is set to be higher.

  According to the above configuration, the external force F1 input in the axial direction of the shaft 2 can be effectively absorbed by the cushion members 3A, 3B, 3C, 3D, so that the pressure applied to the side plates 11, 12 is reduced. be able to. Therefore, it is possible to eliminate the side plates 11 and 12 and to select an inexpensive material having lower wear resistance and lower hardness than the conventional material as the material of the side plates 11 and 12. R can be made inexpensive.

  Further, if the rigidity against the external force F2 in the cushion members 3A, 3B, 3C, and 3D is lowered to such an extent that the pressure applied to the side plates 11 and 12 can be sufficiently reduced, when the external force F2 acts on the shaft 2, The external force F2 is absorbed excessively by the cushion members 3A, 3B, 3C, and 3D, and the external force F2 is not sufficiently transmitted to the shaft 2, so that the damping force of the rotary damper R may be lower than a desired damping force. However, according to the above configuration, only the rigidity with respect to the external force F1 in the cushion members 3A, 3B, 3C, and 3D can be reduced and the rigidity with respect to the external force F2 can be maintained high, so there is no fear of such a problem.

  Although preferred embodiments of the present invention have been described in detail above, it should be understood that modifications, variations and changes may be made without departing from the scope of the claims.

A Mounting device B Car body F1 External force (force input in the axial direction of the shaft)
F2 external force (force input in the direction of rotating the shaft)
R Rotary damper 1 Housing 2 Shaft 2x Shaft center lines 3A, 3B, 3C, 3D Cushion members 6A, 6B First plate 7A, 7B Second plate 62 First extending piece 63 Intermediate piece 71 Fixed clamping piece 72 Second extension Installation piece 73 Opposing clamping piece

Claims (4)

A housing, Rutotomoni a rotatable shaft to the own axis is supported in the housing, the rotary damper for generating a damping force for restricting the rotation of the shaft,
An attachment device for connecting the housing to the vehicle body ;
The attachment device includes a first plate fixed to one of the vehicle body or the housing, a second plate fixed to the other of the vehicle body or the housing, and a gap between the first plate and the second plate. Having one or more cushion members that are elastically deformable,
The rotary member is characterized in that the rigidity with respect to the force input in the direction of rotating the shaft is higher than the rigidity with respect to the force input in the axial direction of the shaft. damper. The cushion member is made of rubber, and is set so that when a force is input in the axial direction of the shaft, a shearing force is applied, and when a force is input in the direction of rotating the shaft, a compressive force is applied. The rotary damper according to claim 1, wherein the rotary damper is provided. Upper Symbol first plate are arranged side by side on both sides of the center line along the center line of the shaft in pairs, respectively, one end fixed to one of the body or the housing in a vertical direction a first extending piece extending, which has an intermediate piece extending horizontally from the other end of the first extended cover,
The second plate forms a pair, faces the first plate, and is arranged horizontally along the center line on both sides of the center line, and is fixed to the other of the vehicle body or the housing , respectively. extending in the horizontal direction while facing the fixed gripping piece, and a second extending piece having one end extending in the vertical direction is fixed to the fixed gripping piece, and the fixed gripping piece from the other end of the second extending piece being An opposing clamping piece ,
In the first plate and the second plate that face each other, the intermediate piece is inserted between the fixed holding piece and the opposed holding piece, respectively, and between the fixed holding piece and the intermediate piece, the opposed holding piece The rotary damper according to claim 2, wherein the cushion member is interposed between the piece and the intermediate piece. The rotary damper according to claim 3, wherein the cushion members are respectively bonded to both the first plate and the second plate that sandwich the cushion members.

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