Damper Device

Abstract

To provide a damper device which can increase the variation of an installation place by downsizing and simplifying a contour shape.SOLUTION: In a damper device 100 constituted of a rotary damper, a compensation device accommodation part 110 is formed in a housing main body 102 which constitutes a housing 101. The compensation device accommodation part 110 is formed into a bottomed cylindrical shape extending along an axial direction of a bottomed cylindrical working fluid accommodation part 103 which is formed in the housing main body 102. The compensation device accommodation part 110 has an atmospheric air face 112 hanging out on the housing main body 102 and exposed to the outside, and a working fluid face 113 hanging out into the working fluid accommodation part 103. In this case, the compensation device accommodation part 110 is formed in each individual chamber of an individual chamber R1 and an individual chamber R4 of four individual chambers R1 to R4 which partition the inside of the working fluid accommodation part 103 in a state that the compensation device accommodation part straddles a clearance between a fixed vane 104 and an accommodation part wall face 103b.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a damper device including a volume change compensation device that is connected to a hydraulic fluid storage section that stores liquid in a liquid-tight manner and compensates for a volume change of the liquid. [Background technology]

[0002] Conventionally, rotary dampers have been used as a kinetic energy damping device in a rotating mechanism of a four-wheeled or two-wheeled self-propelled vehicle or industrial machine or device. For example, the following Patent Document 1 discloses a rotary damper equipped with a temperature compensation mechanism as a volume change compensation device on the outer surface of a housing in which a hydraulic oil chamber is formed, in order to compensate for a volume change caused by a temperature change of the hydraulic oil in the hydraulic oil chamber. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-82593 Summary of the Invention

[0004] However, in the rotary damper disclosed in Patent Document 1, the temperature compensation mechanism serving as a volume change compensation device is provided by protruding from the outer surface of the housing, which causes problems such as an increase in size of the rotary damper and a complex external shape, limiting installation locations.

[0005] The present invention has been made to address the above-mentioned problems, and an object of the present invention is to provide a damper device that can be made smaller and simpler in external shape to increase the variety of installation locations.

[0006] In order to achieve the above object, the present invention is characterized by comprising a hydraulic fluid storage section that liquid-tightly stores a hydraulic fluid made of liquid, a hydraulic fluid pressing body that slides while pressing the hydraulic fluid in the hydraulic fluid storage section, and a compensation device storage section that stores a volume change compensation device that compensates for a volume change of the hydraulic fluid in the hydraulic fluid storage section,A housing has a cylindrical hydraulic fluid storage portion and fixed vanes formed as walls along the radial direction within the hydraulic fluid storage portion to divide the hydraulic fluid storage portion and prevent the hydraulic fluid from flowing in the circumferential direction. A rotor has movable vanes on the outer periphery of a shaft that rotate while pushing the hydraulic fluid and divides the hydraulic fluid storage portion. In the damper device, which is provided with the above-mentioned and which attenuates a force input to a hydraulic fluid pressing body by causing the hydraulic fluid to flow, the compensation device accommodating section has an outside air surface, a part of which is in contact with the outside air, and a hydraulic fluid surface, the other part of which is in contact with the hydraulic fluid in the hydraulic fluid accommodating section, It is formed by overhanging both sides of the fixed vane. The reason is that

[0007] According to the features of the present invention configured in this manner, the damper device is configured such that a portion of the compensation device accommodating portion that accommodates the volume change compensation device has an outside air surface that is in contact with the outside air, and another portion has a working fluid surface that is in contact with the working fluid in the working fluid accommodating portion. In other words, since the damper device is formed such that a portion of the compensation device accommodating portion faces the outside air while the other portion faces or is recessed into the interior of the working fluid accommodating portion, the amount of protrusion of the compensation device accommodating portion from the outer surface of the damper device can be reduced and the external shape of the damper device can be made smaller and simpler, thereby increasing the variety of installation locations.

[0008] Also, This is how it was configured Features of the invention According to the disclosure, the damper device can compensate for volumetric changes in the working fluid by using a rotary damper that includes a housing having a cylindrically formed working fluid accommodating portion and fixed vanes that are formed as walls extending radially within the working fluid accommodating portion to divide the working fluid accommodating portion and prevent the circumferential flow of the working fluid, and a rotor on the outer periphery of a shaft having movable vanes that rotate while pushing the working fluid and dividing the working fluid accommodating portion.

[0009] Also, This is how it was configured Features of the invention According to the present invention, since the damper device has a compensation device accommodating portion formed to protrude on both sides of the fixed vane, the compensation device accommodating portion and the fixed vane mutually reinforce each other, thereby increasing rigidity.

[0010] Another feature of the present invention resides in that in the damper device, the compensation device accommodating portion is formed in the housing.

[0011] According to another feature of the present invention configured in this manner, since the damper device has a compensation device accommodating portion formed in the housing, the large compensation device accommodating portion can be formed without protruding significantly in line with the shape of the housing.

[0012] Another feature of the present invention is that, in the damper device, the working fluid accommodating section is formed in a bottomed cylindrical shape having an opening on one side and a bottom on the other side, and the opening is closed by a lid, and the compensation device accommodating section has an opening on the opposite side to the lid for inserting and removing the volume change compensation device.

[0013] According to another feature of the present invention configured in this manner, the compensation device accommodating section of the damper device has an opening on the opposite side of the lid body for inserting and removing the volume change compensation device, so that the volume change compensation device can be inserted and removed from the opposite side of the lid body, and by forming the compensation device accommodating section in close contact with the lid body, the external shape of the damper device can be made smaller and simpler, thereby increasing the variety of installation locations.

[0014] Another feature of the present invention is that, in the damper device, the housing has a hydraulic fluid accommodating section divided into at least two individual chambers, and the compensation device accommodating section is formed in communication with the individual chamber that is always at a relatively low pressure among the at least two individual chambers.

[0015] According to another feature of the present invention configured in this manner, the damper device is formed in communication with the individual chamber that is always at a relatively low pressure among the individual chambers in which at least two compensation device accommodating sections are formed, thereby making it possible to avoid the inconvenience of the pressure in the individual chamber, which is relatively high, being absorbed by the volume change compensation device and making it difficult for the pressure in that individual chamber to increase.

[0016] Another feature of the present invention is that in the damper device, the compensation device accommodating portion is formed at a position adjacent to the individual chamber with which the compensation device accommodating portion communicates.

[0017] According to another feature of the present invention configured in this manner, since the compensation device accommodating portion of the damper device is formed at a position adjacent to the private room with which the compensation device accommodating portion is connected, the external shape of the damper device can be made smaller and simpler, thereby increasing the variety of installation locations.

[0018] Another feature of the present invention is that, in the damper device, the working fluid accommodating portion is formed in a bottomed cylindrical shape having an opening on one side and a bottom on the other side, and the opening is closed by a lid, and the compensation device accommodating portion has a communicating flow hole on the opening side of the working fluid accommodating portion for circulating working fluid between the working fluid accommodating portion and the working fluid accommodating portion.

[0019] According to another feature of the present invention configured in this manner, the damper device has a communicating hole for circulating working fluid between the compensation device accommodating portion and the working fluid accommodating portion, and this communicating hole opens to the opening side of the working fluid accommodating portion, so that the communicating hole can be easily and accurately molded through the opening of the working fluid accommodating portion.

[0020] Also, In these cases In the damper device, the compensation device accommodating portion has a surface area of ​​an outside air surface larger than a surface area of ​​a working liquid surface. It can be made .

[0021] According to this, In the damper device, the surface area of ​​the outside air surface in the compensation device housing portion is larger than the surface area of ​​the hydraulic fluid surface, so that the amount of the compensation device housing portion entering the hydraulic fluid housing portion can be suppressed, and the reduction in the capacity of the hydraulic fluid housing portion can be suppressed. In addition, the damper device is composed of a rotary damper. Where In this case, the reduction in the sliding amount of the hydraulic fluid pressing body can be suppressed.

[0022] Also, In these cases In the damper device, the compensation device accommodating portion has a surface area of ​​the working liquid surface larger than a surface area of ​​the outside air surface. It can be made .

[0023] According to this Since the surface area of ​​the working liquid surface in the compensation device accommodating section of the damper device is larger than the surface area of ​​the outside air surface, the amount of protrusion of the compensation device accommodating section on the outer surface of the damper device can be reduced, thereby making the external shape of the damper device smaller and simpler, and increasing the variety of installation locations. [Brief description of the drawings]

[0026] [Figure 1] 1 is a perspective view of an overall configuration of a damper device according to the present invention, as viewed from the lid side. [Diagram 2] 2 is a perspective view of the external configuration of the damper device shown in FIG. 1, as viewed from a housing main body side. [Diagram 3] 2 is a vertical sectional view showing the internal structure of the damper device shown in FIG. [Figure 4] 2 is a cross-sectional view showing the internal structure of the damper device shown in FIG. [Diagram 5] 2 is a perspective view showing the overall configuration of a housing main body shown in FIG. 1. [Figure 6] 5 is an explanatory diagram showing a cross-sectional structure of the damper device in a schematic manner to explain an operating state in which the rotor of the damper device shown in FIG. 4 has rotated counterclockwise; FIG. [Figure 7] 5 is an explanatory diagram showing a schematic cross-sectional structure of the damper device in order to explain an operating state in which a rotor of the damper device shown in FIG. 4 rotates clockwise; FIG. [Figure 8] 11 is a cross-sectional view showing an internal structure of a damper device according to a modified example of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of a damper device according to the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of the overall configuration of a damper device 100 according to the present invention, as viewed from the cover side. Fig. 2 is a perspective view of the external configuration of the damper device 100 shown in Fig. 1, as viewed from the housing main body side. Fig. 3 shows the internal structure of the damper device 100 shown in Fig. 1. Longitudinal section FIG. 4 shows the internal structure of the damper device 100 shown in FIG. Cross Section It is.

[0028] In addition, in each drawing referred to in this specification, some components are exaggerated and shown diagrammatically to facilitate understanding of the present invention. Therefore, the dimensions and ratios between the components may differ. This damper device 100 is a damping device that is attached to the base end of a swing arm that supports the rear wheel of a two-wheeled self-propelled vehicle (motorcycle) so that the rear wheel can move up and down, and damps the kinetic energy when the rear wheel moves up and down.

[0029] (Configuration of the damper device 100) The damper device 100 includes a housing 101. The housing 101 is a component that constitutes the casing of the damper device 100 while rotatably holding a rotor 140 (described later), and is made of aluminum, iron, zinc, or various resin materials such as polyamide resin. Specifically, the housing 101 is mainly made up of a housing main body 102 and a lid 130.

[0030] The housing body 102 is a component that accommodates the volume change compensation device 120, the movable vanes 145, 146 of the rotor 140, and the hydraulic fluid 160, and rotatably supports one end of the shaft 141 of the rotor 140, and is formed in a bottomed cylindrical shape with one end of the cylindrical body having a large opening and the other end having a small opening. More specifically, the housing body 102 has a lid body attachment part 102a that protrudes like a flange at one end of the cylindrical body, and a cylindrical hydraulic fluid accommodating part 103 is formed inside the lid body attachment part 102a with a large opening.

[0031] Meanwhile, a rotor support portion 107 is formed at the other end of the housing body 102 in communication with the bottom portion 103a of the hydraulic fluid accommodating portion 103. Further, air vent holes 108a, 108b and a compensation device accommodating portion 110 are formed on the outer surface of the housing body 102.

[0032] 4 and 5, the hydraulic fluid accommodating portion 103 is a space that liquid-tightly accommodates the hydraulic fluid 160 together with the movable vanes 145, 146 of the rotor 140, and is composed of two semi-cylindrical spaces that face each other via the rotor 140 that is disposed in the center of the housing main body 102. Within these hydraulic fluid accommodating portions 103, fixed vanes 104, 105 are each formed integrally with the housing main body 102.

[0033] The fixed vanes 104, 105 are wall-like parts that partition the working fluid storage section 103 together with the rotor 140 to form the individual chambers R1 to R4, and are formed to protrude inward from the storage section wall surface 103b along the axial direction of the housing body 102. In this case, the two fixed vanes 104, 105 are provided at positions facing each other in the circumferential direction on the inner peripheral surface of the storage section wall surface 103b. Each of these fixed vanes 104, 105 has a tip portion facing the cover body 130 and the shaft body 141 of the rotor 140, which will be described later, formed in a groove shape that is recessed in a concave manner, and a seal body 106 is fitted into each of these grooves.

[0034] The seal body 106 is a component for ensuring the liquid-tightness of the individual chambers R1 to R4 formed in the hydraulic fluid storage section 103, and is made of an elastic material such as various rubber materials such as nitrile rubber, hydrogenated nitrile rubber, or fluororubber formed into an L-shape in side view. The seal body 106 is attached to protrude from each tip of the fixed vanes 104, 105 so as to be in close contact with the inner surface of the cover body 130 and the outer circumferential surface of the shaft body 141 of the rotor 140 in a freely slidable state.

[0035] The rotor support portion 107 is a cylindrical portion that rotatably supports one end of the shaft body 141 of the rotor 140. The rotor support portion 107 liquid-tightly supports the shaft body 141 of the rotor 140 via a sealing material such as a bearing and a packing.

[0036] The air vent holes 108a, 108b are individually connected to the private chamber R1 and the private chamber R4, and are through holes used to vent the air in the private chamber R1 and the private chamber R4. Each of the air vent holes 108a, 108b is detachably blocked by a plug.

[0037] The compensation device accommodating section 110 is a section that accommodates the volume change compensation device 120, and is formed integrally with the housing body 102 in a state where it is exposed on the outer surface of the housing body 102. The compensation device accommodating section 110 is formed in a bottomed cylindrical shape that extends along the axial direction of the housing body 102, and has an outside air surface 112 and a working liquid surface 113. In this case, the compensation device accommodating section 110 has an opening 111 formed on the rotor support section 107 side that opens toward the outside, and the side of the lid body mounting section 102a is closed by a part of the lid body mounting section 102a. The opening 111 is a section through which the volume change compensation device 120 is inserted and removed, and is closed by a plug 123.

[0038] The outside air surface 112 is the outside surface of the compensation device accommodating section 110 exposed from the outside surface of the housing body 102. On the other hand, the working fluid surface 113 is the outside surface of the compensation device accommodating section 110 exposed inside the working fluid accommodating section 103. That is, the compensation device accommodating section 110 is formed in such a manner that a part of the outside surface is exposed in a state of protruding from the outside surface of the housing body 102 via the outside air surface 112, and another part of the outside surface is formed in a state of protruding into the inside of the working fluid accommodating section 103 via the working fluid surface 113. In this embodiment, the compensation device accommodating section 110 is formed so as to protrude into the inside of the working fluid accommodating section 103 to a depth of about half the inner diameter. As a result, the compensation device accommodating section 110 is formed so that the surface area of ​​the outside air surface 112 is larger than the surface area of ​​the working fluid surface 113.

[0039] In this case, the compensation device accommodating section 110 is formed so as to protrude in a fan shape from both wall surfaces of the fixed vane 104 formed in the working fluid accommodating section 103 in the circumferential direction of the working fluid accommodating section 103. That is, the compensation device accommodating section 110 is formed in each of the individual chambers R1 and R4 among the four individual chambers R1 to R4 that divide the working fluid accommodating section 103, straddling the fixed vane 104 and the accommodating section wall surface 103b. The compensation device accommodating section 110 is also formed with a communication hole 114 that communicates with the working fluid accommodating section 103.

[0040] The communicating hole 114 is a portion that allows the working fluid 160 to flow in both directions between the working fluid accommodating portion 103 and the compensation device accommodating portion 110, and is configured as a through hole. This communicating hole 114 is formed between the bottom of the compensation device accommodating portion 110 and the working fluid accommodating portion 103. In this case, the communicating hole 114 is formed in a state of communicating with the individual chamber that is always at low pressure among the four individual chambers R1 to R4, that is, the individual chamber R1 in this embodiment.

[0041] Volume change compensation device 120 is a device for compensating for a change in volume caused by expansion or contraction due to a temperature change of working fluid 160 in working fluid accommodation portion 103. Specifically, volume change compensation device 120 is mainly composed of a cylinder, piston 121, pressing elastic body 122, and plug 123. The cylinder is a portion that accommodates working fluid 160, piston 121, pressing elastic body 122, and plug 123, respectively, and is the compensation device accommodation portion 110 described above.

[0042] The piston 121 is a component for forming a space in the cylinder (compensator accommodating portion 110) for accommodating the working fluid 160 introduced through the communicating hole 114, and is formed in a cylindrical shape that slides liquid-tightly in the axial direction inside the cylinder. The surface of the piston 121 on the communicating hole 114 side is formed in a flat disk shape large enough to block the inside of the cylinder, and the side opposite to the communicating hole 114 extends in a rod shape and is slidably fitted into the plug 123.

[0043] Pressing elastic body 122 is a coil spring that is provided between piston 121 and plug 123 and elastically presses piston 121 toward communicating hole 114. Plug 123 is a component that receives the reaction force of pressing elastic body 122, and is screwed into the end of the cylinder (compensation device accommodating portion 110). In other words, volume change compensation device 120 is assembled integrally with housing body 102.

[0044] The lid 130 is a component for liquid-tightly sealing the hydraulic fluid storage portion 103 formed in the housing body 102, and is mainly composed of a lid body main body 131 and a rotor support portion 133. The lid body main body 131 is a portion for liquid-tightly sealing the hydraulic fluid storage portion 103, and is formed in a plate shape corresponding to the lid body attachment portion 102a. Adjustment needles 132a and 132b are formed on this lid body main body 131.

[0045] The adjustment needle 132a is a component formed inside the lid body 131, which communicates the private chambers R1 and R2 in the hydraulic fluid storage section 103 with each other to allow the hydraulic fluid 160 to flow between them, seals a bypass flow path (not shown) that communicates the private chambers R1 and R2 with the outside from the outside, and adjusts the flow rate of the flowing hydraulic fluid 160. The adjustment needle 132a can be rotated with a tool (not shown) such as a screwdriver to increase or decrease the flow rate of the hydraulic fluid 160.

[0046] The adjusting needle 132b is a part formed inside the cover body 131, which communicates the private chambers R1 and R3 in the hydraulic fluid storage section 103 with each other to allow the hydraulic fluid 160 to flow between them, seals a bypass flow path (not shown) that communicates the private chambers R1 and R3 with the outside from the outside, and adjusts the flow rate of the hydraulic fluid 160 that flows. The adjusting needle 132b can be rotated using a tool (not shown) such as a screwdriver to increase or decrease the flow rate of the hydraulic fluid 160. In Figs. 1 and 3, the cylindrical parts of the cover body 131 in which the adjusting needles 132a and 132b are built are denoted by reference characters.

[0047] The rotor support part 133 is a cylindrical part that rotatably supports the other end of the shaft body 141 of the rotor 140. The rotor support part 133 liquid-tightly supports the outer periphery of the shaft body 141 of the rotor 140 via a sealing material such as a bearing and a packing. The lid body 130 is attached by four bolts 134 to the lid body attachment part 102a in the housing main body 102 where the working fluid storage part 103 opens.

[0048] The rotor 140 is disposed within the working fluid accommodating section 103 of the housing 101 and divides the working fluid accommodating section 103 into four spaces: individual chambers R1, R2, R3 and R4. The rotor 140 rotates within the working fluid accommodating section 103 to increase or decrease the volume of each of the individual chambers R1, R2, R3 and R4, and is primarily composed of a shaft 141 and movable vanes 145, 146.

[0049] The shaft body 141 is a round bar-shaped portion that supports the movable vanes 145, 146, and is made of aluminum, iron, zinc, or various resin materials such as polyamide resin. Both ends of the shaft body 141 are formed into a cylindrical shape and are supported by the rotor support portion 107 of the housing body 102 and the rotor support portion 133 of the cover 130 in a freely rotatable and slidable state, respectively. In addition, one of the ends of the shaft body 141 (in FIG. 3) left At the end of the damper device 100, a connecting portion 142 is formed extending in the axial direction for connecting to one of the two components to which the damper device 100 is attached. In this embodiment, the connecting portion 142 is formed in the shape of a rod having a hexagonal cross section.

[0050] Further, an in-shaft bidirectional communicating passage 143 and an in-shaft one-way communicating passage 144 are formed in the shaft body 141. The in-shaft bidirectional communicating passage 143 is a passage that allows the working fluid 160 to flow between two individual chambers whose volumes simultaneously decrease when the movable vanes 145, 146 rotate in one direction and whose volumes simultaneously increase when the movable vanes 145, 146 rotate in the other direction. In this embodiment, the in-shaft bidirectional communicating passage 143 is formed in a state that penetrates the shaft body 141 so that individual chambers R2 and R4 whose volumes simultaneously increase when the movable vanes 145, 146 rotate in the counterclockwise direction shown in the figure and whose volumes simultaneously decrease when the movable vanes 145, 146 rotate in the clockwise direction shown in the figure communicate with each other.

[0051] The intra-shaft one-way communication passage 144 is a passage through which the working fluid 160 flows only from one of two chambers between which the volumes simultaneously increase as the movable vanes 145, 146 rotate in the one direction and simultaneously decrease as the movable vanes 145, 146 rotate in the other direction. In this embodiment, the intra-shaft one-way communication passage 144 is formed in a state penetrating the shaft body 141 between the chambers R1 and R3 whose volumes simultaneously decrease as the movable vanes 145, 146 rotate in the counterclockwise direction shown in the figure and simultaneously increase as the movable vanes 145, 146 rotate in the clockwise direction shown in the figure. In this case, the intra-shaft one-way communication passage 144 is formed in a state penetrating the shaft body 141 via a one-way valve so that the working fluid 160 flows only from the chamber R1 to the chamber R3.

[0052] The movable vanes 145, 146 are components for dividing the inside of the working fluid storage section 103 into a plurality of spaces and increasing or decreasing the volume of each of these spaces in a liquid-tight manner, and are each formed of a plate-like body extending in the radial direction of the shaft body 141 (working fluid storage section 103). In this case, these two movable vanes 145, 146 are formed to extend in opposite directions (in other words, on the same imaginary plane) via the shaft body 141. These movable vanes 145, 146 have C-shaped (or U-shaped) tip portions facing the bottom 103a, the storage section wall surface 103b, and the inner surface of the lid body 130, respectively, each formed in a groove shape that is recessed in a concave manner, and a seal body 147 is fitted into each of these grooves.

[0053] The seal body 147, like the seal body 106, is a component for ensuring liquid-tightness of the individual chambers R1 to R4 formed in the hydraulic fluid storage section 103, and is configured by forming an elastic material such as various rubber materials such as nitrile rubber, hydrogenated nitrile rubber, or fluororubber into a C-shape (or U-shape) in side view. The seal body 147 is attached by projecting from each tip of the movable vanes 145, 146 so as to be in close contact with the bottom 103a, the storage section wall surface 103b, and the inner surface of the lid body 130 in a slidable state.

[0054] As a result, the movable vanes 145, 146 cooperate with the fixed vanes 104, 105 to move the hydraulic fluid into the hydraulic fluid storage section 103. There are four spaces The private chambers R1, R2, R3, and R4 are formed liquid-tightly with each other. More specifically, in the working fluid storage section 103, the fixed vane 104 and the movable vane 145 form the private chamber R1, the movable vane 145 and the fixed vane 105 form the private chamber R2, the fixed vane 105 and the movable vane 146 form the private chamber R3, and the movable vane 146 and the fixed vane 104 form the private chamber R4. That is, the private chambers R1, R2, R3, and R4 are formed adjacent to each other in the circumferential direction in the working fluid storage section 103.

[0055] An intra-vane two-way communicating passage 151 and an intra-vane one-way communicating passage 152 are respectively formed in these movable vanes 145, 146. The intra-vane two-way communicating passage 151 is formed in the movable vane 145 which separates the chamber R1 and the chamber R2 such that the chamber R2 of the chambers R2 and R4 as two communicating chambers communicated by the intra-shaft two-way communicating passage 143 and the chamber R1 of the chambers R1 and R3 as two one-sided communicating chambers communicated by the intra-shaft one-way communicating passage 144 communicate with each other.

[0056] The vane internal two-way communication passage 151 is configured to allow the working fluid 160 to flow from the private chamber R1 side to the private chamber R2 side, and to allow the working fluid 160 to flow while being restricted from the private chamber R2 side to the private chamber R1 side. Specifically, the vane internal two-way communication passage 151 is configured as a one-way valve that allows the fluid to flow only from one side to the other. Hydraulic fluid 160 The one-way valve is configured by arranging a throttle valve that allows the fluid to flow in both directions while restricting the flow. Note that "while restricting the flow of the fluid" means that the fluid (working fluid 160) does not easily flow under the same conditions (e.g., pressure, viscosity of the working fluid, etc.) as compared to the ease of flow of the fluid in the one-way valve.

[0057] The intra-vane one-way communicating passage 152 is formed in the movable vane 146 that separates the private chambers R3 and R4 so as to restrict the flow of the working fluid 160 only from the private chamber R3 side to the private chamber R4 side between the private chambers R3 and R4 to which the intra-vane two-way communicating passage 151 does not communicate. Specifically, the intra-vane one-way communicating passage 152 is configured by arranging in series a one-way valve that allows the working fluid 160 to flow only from the private chamber R3 side to the private chamber R4 side, and a throttle valve that restricts the flow of the working fluid 160 while allowing the fluid to flow in both directions.

[0058] The damper device 100 generates a damping force when the rotor 140 rotates by restricting the flow of the working fluid 160 between the private chambers R1 to R4 through the intra-shaft two-way communicating passage 143, the intra-shaft one-way communicating passage 144, the intra-vane two-way communicating passage 151, and the intra-vane one-way communicating passage 152. That is, the damper device 100 according to this embodiment is configured as a rotary damper that generates a damping force during rotation.

[0059] The hydraulic fluid 160 is a substance for applying a damping function to the damper device 100 by applying resistance to the movable vanes 145, 146 that rotate the hydraulic fluid storage portion 103, and is filled in the hydraulic fluid storage portion 103. The hydraulic fluid 160 is made of a liquid, gel, or semi-solid substance having a flowability with a viscosity according to the specifications of the damper device 100. In this case, the viscosity of the hydraulic fluid 160 is appropriately selected according to the specifications of the damper device 100. In this embodiment, the hydraulic fluid 160 is made of oil, for example, mineral oil or silicone oil. In FIG. 4, the hydraulic fluid 160 is shown by hatching in a dashed circle.

[0060] (Operation of the damper device 100) Next, the operation of the damper device 100 configured as above will be described. The damper device 100 is attached between two devices that rotate relatively to each other, and generates a damping force when the devices rotate. For example, the damper device 100 generates a damping force for a swing arm when the swing arm moves up and down while the self-propelled vehicle is traveling.

[0061] Specifically, in the damper device 100, when the rear wheel of the self-propelled vehicle runs up a step or the like from a state in which the swing arm is lowered and rises, the rotor 140 rotates counterclockwise as shown in the figure. That is, in the damper device 100, the movable vane 145 rotates toward the fixed vane 104, and the movable vane 146 rotates toward the fixed vane 105.

[0062] In this case, in the damper device 100, the outflow of working fluid 160 is restricted only in chamber R3 due to the action of the in-shaft two-way communicating passage 143, the in-shaft one-way communicating passage 144, the in-vane two-way communicating passage 151, and the in-vane one-way communicating passage 152, and therefore the rotor 140 rotates counterclockwise as shown in the figure while generating a damping force that is smaller than the damping force in the clockwise direction as shown in the figure, which will be described later.

[0063] On the other hand, in the damper device 100, when the rear wheel of the self-propelled vehicle goes over a step and the swing arm goes down from the raised state, the rotor 140 rotates clockwise as shown in Fig. 7. That is, in the damper device 100, the movable vane 145 rotates toward the fixed vane 105 and the movable vane 146 rotates toward the fixed vane 104.

[0064] In this case, in the damper device 100, the outflow of the working fluid 160 is restricted in the private chambers R2 and R4 due to the action of the intra-shaft two-way communicating passage 143, the intra-shaft one-way communicating passage 144, the intra-vane two-way communicating passage 151, and the intra-vane one-way communicating passage 152, and thus the rotor 140 rotates clockwise in the figure while generating a damping force larger than the damping force in the counterclockwise direction in the figure. In other words, the volume change compensation device 120 is connected to the private chamber R1 in which a low pressure state is maintained without being in a high pressure state both when the rotor 140 rotates clockwise and counterclockwise in the figure.

[0065] 6 and 7, the rotation direction of rotor 140 is indicated by a thick dashed arrow, and the flow direction of working fluid 160 in in-shaft two-way communicating passage 143, in-shaft one-way communicating passage 144, in-vane two-way communicating passage 151, and in-vane one-way communicating passage 152 is indicated by a thin dashed arrow. Also, in Fig. 6 and 7, a state in which the pressure of working fluid 160 is relatively high with respect to the other individual chambers is indicated by thick hatching, and a state in which the pressure is relatively low is indicated by light hatching.

[0066] On the other hand, the volume change compensation device 120 compensates for the volume change based on the temperature change of the working fluid 160 regardless of the rotational movement of the rotor 140. Specifically, when the temperature of the working fluid 160 in the damper device 100 drops, the volume change compensation device 120 reduces the overall volume of the working fluid 160. In this case, the volume change compensation device 120 compensates for the decrease in the volume of the working fluid 160 in the working fluid accommodation section 103 by the working fluid 160 in the cylinder (compensation device accommodation section 110) being pushed by the piston 121 and supplied to the private chamber R1 through the communicating circulation hole 114.

[0067] On the other hand, when the temperature of the working fluid 160 rises, the volume of the entire working fluid 160 in the damper device 100 increases in the volume change compensation device 120. In this case, the increase in the volume of the working fluid 160 causes the working fluid 160 in the private chamber R1 to be supplied to the cylinder (compensation device accommodating portion 110) through the communicating flow hole 114, thereby compensating for the increase in the volume of the working fluid 160 in the working fluid accommodating portion 103.

[0068] As can be understood from the above description of the operating method, according to the above embodiment, the damper device 100 is configured such that a part of the compensation device accommodating section 110 that accommodates the volume change compensation device 120 has an outside air surface 112 that contacts the outside air, and another part of the compensation device accommodating section 110 has a working liquid surface 113 that contacts the working liquid 160 in the working liquid accommodating section 103. That is, the damper device 100 is formed such that a part of the compensation device accommodating section 110 faces the outside air, while the other part is recessed inside the working liquid accommodating section 103. This makes it possible to suppress the amount of protrusion of the compensation device accommodating section 110 on the outer surface of the damper device 100, thereby making it possible to reduce and simplify the external shape of the damper device 100 and increase the variety of installation locations. In addition, the damper device 100 can suppress the temperature rise of the working liquid 160 caused by the rotation of the rotor 140 by increasing the surface area of ​​the working liquid accommodating section 103 that faces the outside due to the compensation device accommodating section 110.

[0069] Furthermore, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the scope of the present invention. In the description of each modification, the same reference numerals are used to designate the same parts as those in the above-described embodiment, and redundant description will be omitted.

[0070] For example, in the above embodiment, the compensation device accommodating section 110 is formed so that the surface area of ​​the outside air surface 112 is larger than the surface area of ​​the working fluid surface 113. This allows the damper device 100 to suppress the amount of the compensation device accommodating section 110 entering the working fluid accommodating section 103, thereby suppressing a decrease in the capacity of the working fluid accommodating section 103 and a decrease in the amount of rotational sliding of the movable vanes 145, 146. However, the compensation device accommodating section 110 can also be formed so that the surface area of ​​the working fluid surface 113 is larger than the surface area of ​​the outside air surface 112. This allows the damper device 100 to reduce the amount of protrusion of the compensation device accommodating section 110 from the outer surface of the housing main body 102, thereby miniaturizing and simplifying the external shape of the damper device 100 and increasing the variety of installation locations.

[0071] Furthermore, in the above embodiment, the compensation device accommodating portion 110 is formed in the housing main body 102. This allows the damper device 100 to be formed without the large compensation device accommodating portion 110 protruding significantly in accordance with the shape of the housing main body 102. However, it is sufficient that the compensation device accommodating portion 110 is configured to include the outside air surface 112 and the working liquid surface 113. Therefore, the compensation device accommodating portion 110 can be formed in the cover 130 instead of or in addition to the housing main body 102.

[0072] In the above embodiment, the damper device 100 has the compensation device accommodating portion 110 formed at a position adjacent to the individual chamber R1 with which the communicating flow hole 114 communicates. This allows the damper device 100 to have a smaller and simpler outer shape and increase the variety of installation locations. However, the damper device 100 may also have the compensation device accommodating portion 110 formed at a position adjacent to an individual chamber (e.g., individual chamber R2 or individual chamber R3) other than the individual chamber R1 with which the communicating flow hole 114 communicates. In this case, the communicating flow hole 114 is formed to extend into and / or outside the housing main body 102 so as to communicate the individual chamber into which the communicating flow hole 114 opens and the compensation device accommodating portion 110.

[0073] Also, in the above embodiment, the communicating holes 114 are formed so as to open toward the opening side of the working fluid accommodating section 103 to which the lid body 130 is attached. This allows the damper device 100 to easily and accurately form the communicating holes 114 through the opening of the working fluid accommodating section 103. However, the communicating holes 114 can also be formed in the cylindrical portion of the working fluid level 113 in the working fluid accommodating section 103, that is, formed so as to open toward the circumferential direction of the working fluid accommodating section 103 above the working fluid level 113.

[0074] Also, in the above embodiment, the compensation device accommodating section 110 has an opening 111 formed on the side opposite the lid body 130 for inserting and removing the volume change compensation device 120. This allows the volume change compensation device 120 to be inserted and removed from the damper device 100 from the side opposite the lid body 130, and by forming the compensation device accommodating section 110 in close contact with the lid body 130, the external shape of the damper device 100 can be made smaller and simpler, thereby increasing the variety of installation locations. However, the compensation device accommodating section 110 can also have an opening 111 formed on the lid body 130 side for inserting and removing the volume change compensation device 120.

[0075] Also, in the above embodiment, the compensation device accommodating portion 110 is formed to protrude on both sides of the fixed vane 104. This allows the compensation device accommodating portion 110 and the fixed vane 104 to mutually reinforce each other, thereby increasing the rigidity of the damper device 100. However, it is sufficient that the compensation device accommodating portion 110 is formed to face or protrude into the working fluid accommodating portion 103. Therefore, the compensation device accommodating portion 110 can be formed to face or protrude into the bottom portion 103a and / or the accommodating portion wall surface 103b at a position spaced apart from the fixed vanes 104, 105 within the working fluid accommodating portion 103.

[0076] Also, the compensation device accommodating section 110 can be formed so as to be smoothly and continuously formed on the outer shape of the housing 101 without protruding from the outer surface of the housing 101 and to face the outside of the housing 101. Also, the compensation device accommodating section 110 can be formed so that the entire volume change compensation device 120 is positioned inside the working fluid accommodating section 103, for example, as shown in FIG. 8. In this case, the compensation device accommodating section 110 can function as a component that determines the rotation amount or rotation angle of the rotor 140. In the damper device 100 shown in FIG. 8, the working fluid accommodating section 103 is divided into three compartments R1 to R3. In the damper device 100 shown in FIG. 8, the movable vane 145 is provided with an in-vane bidirectional communication passage 151 that allows the working fluid 160 to flow from the compartment R2 side to the compartment R1 side and restricts the flow of the working fluid 160 from the compartment R1 side to the compartment R2 side. Further, the movable vane 146 is provided with an in-vane two-way communicating passage 151 that allows the working fluid 160 to flow from the private chamber R2 side to the private chamber R3 side and restricts the flow of the working fluid 160 from the private chamber R3 side to the private chamber R2 side. Further, in this damper device 100, the in-shaft two-way communicating passage 143 and the in-shaft one-way communicating passage 144 are not provided.

[0077] In the above embodiment, the compensation device accommodating section 110 is formed in communication with the individual chamber R1, which is always at a relatively low pressure among the four individual chambers R1 to R4 formed in the hydraulic fluid accommodating section 103. This makes it possible for the damper device 100 to avoid the inconvenience that the pressures of the individual chambers R2 to R4, which are relatively high, are absorbed by the volume change compensation device 120, making it difficult for the pressures of the individual chambers R2 to R4 to increase. However, it goes without saying that the compensation device accommodating section 110 may be formed in any of the four individual chambers R1 to R4 formed in the hydraulic fluid accommodating section 103. In other words, the compensation device accommodating section 110 may be formed in communication with the individual chamber R2 to R4, which is at a relatively high pressure among the four individual chambers R1 to R4 formed in the hydraulic fluid accommodating section 103.

[0078] In the above embodiment, a rotary damper is used as the damper device 100. However, the damper device according to the present invention can be widely applied to damper devices that include a hydraulic fluid storage section that liquid-tightly stores a hydraulic fluid made of liquid, and a hydraulic fluid pressing body that slides while pressing the hydraulic fluid in the hydraulic fluid storage section, and attenuates a force input to the hydraulic fluid pressing body by causing the hydraulic fluid to flow.

[0079] In this case, the damper device can be configured as a direct acting damper device such as a shock absorber, in which a linearly extending cylindrical cylinder is filled with hydraulic fluid and a piston rod is displaced within the cylinder while displacing the hydraulic fluid in the axial direction. In this case, the cylinder corresponds to the hydraulic fluid storage portion according to the present invention, and the piston rod corresponds to the hydraulic fluid pressing body according to the present invention. In the above embodiment, the movable vanes 145, 146 correspond to the hydraulic fluid pressing body according to the present invention. The hydraulic fluid 160 can also be a liquid other than oil, for example, water.

[0080] In the above embodiment, the housing 101 has the housing body 102 formed in a cylindrical shape with a bottom. However, the housing 101 may also be configured such that the housing body 102 is formed in a cylindrical shape and both ends of the cylindrical body are closed with plate-like bodies equivalent to the lids 130.

[0081] In the above embodiment, the damper device 100 divides the single hydraulic fluid housing portion 103 into four individual chambers R1 to R4 by the fixed vanes 104, 105 and the movable vanes 145, 146. However, the damper device 100 may be configured such that the single hydraulic fluid housing portion 103 is divided into at least two individual chambers.

[0082] In the above embodiment, the damper device 100 has the housing 101 as the fixed side and the rotor 140 as the movable side. However, the rotation of the rotor 140 with respect to the housing 101 in the damper device 100 is relative. Therefore, it is natural that the damper device 100 can have the housing 101 as the movable side and the rotor 140 as the fixed side.

[0083] In the above embodiment, the intra-vane two-way communicating passage 151 and the intra-vane one-way communicating passage 152 are provided in the movable vanes 145 and 146, respectively. However, the intra-vane two-way communicating passage 151 and the intra-vane one-way communicating passage 152 can also be provided in the fixed vanes 104 and 105.

[0084] In the above embodiment, the damper device 100 is described as being attached to the swing arm of a two-wheeled self-propelled vehicle. However, the damper device 100 can be attached to a location other than the swing arm of a two-wheeled self-propelled vehicle (for example, a seat opening / closing mechanism), a vehicle other than a two-wheeled self-propelled vehicle (a suspension mechanism, a seat mechanism, or an opening / closing door of a four-wheeled self-propelled vehicle), or a mechanical device, electrical device, or appliance other than a self-propelled vehicle. [Explanation of symbols]

[0085] R1~R4: Private rooms, 100... damper device, 101... housing, 102... housing main body, 102a... lid body mounting portion, 103... hydraulic fluid storage portion, 103a... bottom portion, 103b... storage portion wall surface, 104, 105... fixed vane, 106... seal body, 107... rotor support portion, 108a, 108b... air vent hole, 110: Compensation device housing portion; 111: Opening portion; 112: Outside air surface; 113: Working fluid surface; 114: Communication hole; 120...volume change compensation device, 121...piston, 122...pressure elastic body, 123...plug, 130: lid body, 131: lid body main body, 132a, 132b: adjustment needle, 133: rotor support part, 134: bolt, 140... rotor, 141... shaft body, 142... connecting portion, 143... two-way communication passage in shaft, 144... one-way communication passage in shaft, 145, 146... movable vane, 147... seal body, 151: Two-way communication passage in the vane; 152: One-way communication passage in the vane; 160...hydraulic fluid.

Claims

1. a hydraulic fluid storage portion that stores a hydraulic fluid made of a liquid in a liquid-tight manner; a hydraulic fluid pressing body that slides while pressing the hydraulic fluid in the hydraulic fluid storage portion; a compensation device accommodating portion that accommodates a volume change compensation device that compensates for a volume change of the hydraulic fluid in the hydraulic fluid accommodating portion; a housing having the hydraulic fluid containing portion formed in a cylindrical shape and having a fixed vane formed in the hydraulic fluid containing portion as a wall along a radial direction thereof to divide the hydraulic fluid containing portion and prevent a circumferential flow of the hydraulic fluid; A damper device comprising: a rotor having movable vanes on an outer periphery of a shaft body, the rotor rotating while pressing the hydraulic fluid and dividing the hydraulic fluid accommodating section; and a damper device for damping a force input to the hydraulic fluid pressing body by causing the hydraulic fluid to flow, The compensation device housing portion is An outside air surface, a part of which is in contact with the outside air; a damper device, the other part of which is formed to protrude on both sides of the fixed vane and has a working fluid surface that contacts the working fluid in the working fluid storage portion.

2. The damper device according to claim 1, The compensation device housing portion is A damper device formed in the housing.

3. The damper device according to claim 2, The hydraulic fluid storage section is The container is formed in a cylindrical shape having an opening on one side and a bottom on the other side, and the opening is closed by a lid. The compensation device housing portion is A damper device having an opening on the opposite side to the lid for inserting and removing the volume change compensation device.

4. A damper device according to any one of claims 1 to 3, The housing includes: The inside of the hydraulic fluid storage section is divided into at least two separate chambers, The compensation device housing portion is A damper device characterized in that it is formed in communication with one of the at least two partitioned compartments that is always at a relatively low pressure.

5. A damper device according to any one of claims 1 to 4, The compensation device housing portion is A damper device, wherein the compensation device accommodating portion is formed at a position adjacent to the communicating private chamber.

6. A damper device according to any one of claims 1 to 5, The hydraulic fluid storage section is The container is formed in a cylindrical shape having an opening on one side and a bottom on the other side, and the opening is closed by a lid. The compensation device housing portion is A damper device, characterized in that a communication hole for circulating the working fluid between the working fluid storage portion and the working fluid storage portion is open on the opening side of the working fluid storage portion.

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