JP6807490B1 - Damping force generator - Google Patents

Abstract

The damping force generator 40 moves in the axial direction by rotating the first and second adjusting units 80 and 90 and the first and second adjusting units 80 and 90, respectively, which are rotatably provided. The first and second moving members 73 and 75, and the first and second valve portions 74 and 76 attached to the first and second moving members 73 and 75 to adjust the opening degree of the oil flow path, respectively. It has a first auxiliary mechanism 77 for assisting an operator to grasp that a certain amount of rotation has been performed when the first adjusting unit 80 is rotated. The first auxiliary mechanism 77 is housed in a second storage hole 75c formed in the second moving member 75.

Description

The present invention relates to a damping force generator provided in a hydraulic shock absorber and capable of adjusting the magnitude of the damping force generated by adjusting the flow rate of oil.

For example, a rear cushion as a hydraulic shock absorber is provided at the rear of the two-wheeled vehicle. Some rear cushions are provided with a damping force generator capable of adjusting the magnitude of the damping force. There is a technique disclosed in Patent Document 1 as a damping force generator capable of adjusting the magnitude of the damping force generated by adjusting the flow rate of oil.

In the damping force generator as shown in Patent Document 1, when the compression side adjuster is rotated, the end piece moves forward and backward along the compression side adjuster, and the gap between the throttle portion and the valve portion can be increased or decreased. The same applies to the extension side adjuster.

JP-A-2017-180801

In the damping force generator disclosed in Patent Document 1, the gap between the throttle portion and the valve portion is adjusted by the amount of rotation of each adjuster, whereby the flow rate of oil passing through the throttle portion can be adjusted. By adjusting the flow rate of the oil, the magnitude of the damping force generated in the damping force generator is adjusted. That is, the magnitude of the damping force is determined by the amount of rotation of each adjuster. Since the magnitude of the damping force is determined by the amount of rotation of each adjuster, it is desirable for the operator who finely adjusts the magnitude of the damping force to accurately grasp how much each adjuster is rotated. Is done.

At this time, if the operator can easily grasp the amount of rotation of each adjusting unit, it is desirable that the workability of the adjusting work can be improved. At this time, it is more desirable if the workability can be improved and the size of the damping force generator can be suppressed.

An object of the present invention is to provide a damping force generator capable of improving workability while being compact.

As a result of diligent studies, the present inventor (1) assists the operator to grasp that a certain amount of rotation has occurred when the adjusting unit operated when adjusting the magnitude of the damping force is rotated. It was found that workability can be improved by providing an auxiliary mechanism. In addition, (2) it is possible to suppress the increase in size of the device by accommodating the auxiliary mechanism in the moving member that moves in the axial direction when the adjusting unit operated when adjusting the magnitude of the damping force is rotated. I found out. The present invention has been completed based on these findings.

Hereinafter, the present disclosure will be described.

According to one aspect of the present disclosure, a case forming a part of a flow path through which oil can flow inside, a lid with an opening of the case closed, and a lid rotatably provided on the lid. It is a first male threaded portion that is formed in a male thread shape and is partially formed in a male thread shape, and is rotatable on the lid and a first adjusting portion that is rotated when adjusting the flow rate of the oil flowing in the first direction. The second male screw portion is provided in the above and partly formed in a male screw shape, and is rotated when adjusting the flow rate of the oil flowing in the second direction opposite to the first direction. A second adjusting portion and a first female screw portion into which the first male screw portion is screwed are formed, and a second penetrating portion formed in the second adjusting portion penetrates. A first moving member that is prevented from rotating by means of a moving member that can move along the axis of the first adjusting portion by rotating the first adjusting portion, and the flow path that is supported by the first moving member. A first valve portion whose opening degree can be adjusted, a second female screw portion into which the second male screw portion is screwed, and a first female screw portion formed in the first adjustment portion are formed. A second moving member that is prevented from rotating by penetrating the penetrating portion of the lid and can be moved along the axis of the second adjusting portion by rotating the second adjusting portion, and the second moving member. It is housed in a second valve portion that is supported by a member and can adjust the opening degree of the flow path and a second storage hole formed in the second moving member, and is housed in the first adjusting portion. A first auxiliary mechanism provided so as to be in contact with each other and assisting an operator to grasp that the first adjusting portion has been rotated by a certain amount each time the first adjusting portion is rotated, and the first moving member. It is housed in the first storage hole formed in the above and is provided so as to be in contact with the second adjusting portion, and each time the second adjusting portion is rotated by a certain amount, the operator rotates a certain amount. It has a second auxiliary mechanism for assisting in grasping the fact, and the outer peripheral surface of the first adjusting portion is recessed toward the central axis of the first adjusting portion. A first recess with which the auxiliary mechanism can abut is formed, the first recess is formed in a groove shape on the outer peripheral surface of the first penetrating portion, and the outer peripheral surface of the second adjusting portion is formed. A second recess is formed that is recessed toward the central axis of the second adjusting portion so that the second auxiliary mechanism can abut, and the second recess is grooved on the outer peripheral surface of the second penetrating portion. A damping force generator , which is formed in a shape , is provided.

According to another aspect of the present disclosure, a case forming a part of a flow path through which oil can flow inside, a lid having an opening of the case closed, and a lid rotatably provided on the lid. It is a first male screw portion that is formed in a male screw shape and is partially formed in a male screw shape, and is rotatable on the lid and a first adjustment portion that is rotated when adjusting the flow rate of the oil flowing in the first direction. A second male screw portion is provided in the above and partly formed in a male screw shape, and is rotated when adjusting the flow rate of the oil flowing in the second direction opposite to the first direction. A second adjusting portion and a first female screw portion into which the first male screw portion is screwed are formed, and a second penetrating portion formed in the second adjusting portion penetrates. The first moving member, which is prevented from rotating by the above means and can move in the central axis direction of the first adjusting portion by rotating the first adjusting portion, and the flow path supported by the first moving member. A first valve portion whose opening degree can be adjusted, a second female screw portion into which the second male screw portion is screwed, and a first female screw portion formed in the first adjusting portion are formed. A second moving member that is prevented from rotating by penetrating the penetrating portion of the second adjusting portion and can be moved in the central axis direction of the second adjusting portion by rotating the second adjusting portion, and the second moving member. It is housed in a second valve portion that is supported by a member and can adjust the opening degree of the flow path, and a second storage hole formed in the second moving member, and is housed in the first adjusting portion. A first auxiliary mechanism provided so as to be in contact with each other and assisting an operator to grasp that the first adjusting portion has been rotated by a certain amount each time the first adjusting portion is rotated, and the first moving member. It is housed in the first storage hole formed in the above and is provided so as to be in contact with the second adjusting portion, and each time the second adjusting portion is rotated by a certain amount, the operator rotates a certain amount. It has a second auxiliary mechanism for assisting in grasping the fact, and the outer peripheral surface of the first adjusting portion is recessed toward the central axis of the first adjusting portion. A first recess with which the auxiliary mechanism can abut is formed in a groove shape along the central axis of the first adjusting portion, and the outer peripheral surface of the second adjusting portion is formed on the outer peripheral surface of the second adjusting portion. A second recess that is recessed toward the central axis and to which the second auxiliary mechanism can come into contact is formed in a groove shape along the central axis of the second adjusting portion, and the first auxiliary mechanism is the said. By the first coil spring which is a coil spring housed in the second storage hole and the first coil spring. The second auxiliary mechanism includes a first ball, which is a ball to which a force is applied toward the outer peripheral surface of the first adjusting portion, and the second auxiliary mechanism is a coil spring housed in the first storage hole. The first male screw includes a second coil spring, and a second ball, which is a ball to which a force is applied toward the outer peripheral surface of the second adjusting portion by the second coil spring. The portion and the first recess are integrally formed in one member, and the second male screw portion and the second recess are integrally formed in one member. A force generator is provided.

According to the present invention, it is possible to provide a damping force generator capable of improving workability while being compact.

It is a side view of the hydraulic shock absorber equipped with the damping force generator according to Example 1. FIG. It is a cross-sectional view taken along the line 2-2 of FIG. It is an exploded view of the damping force adjusting mechanism shown in FIG. It is a perspective view of the 1st adjustment part and the 2nd adjustment part shown in FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 1. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 1. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 1. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 2. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 2. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 2. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 3. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 3. FIG. It is a figure explaining the auxiliary mechanism used for the damping force generator by Example 3. FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the explanation, the left and right refer to the left and right with respect to the occupant of the vehicle equipped with the damping force adjusting device, and the front and rear refer to the front and rear with reference to the traveling direction of the vehicle. The form shown in the attached figure is an example of the present invention, and the present invention is not limited to this form.

<Example 1>
See FIG. The damping force generator 40 constitutes, for example, a part of the rear cushion 10 (hydraulic shock absorber 10) mounted on the rear part of the motorcycle.

The rear cushion 10 is a hydraulic shock absorber whose upper end is fixed to the vehicle body and whose lower end is fixed to the side portion of the rear wheel, and a damping force is generated by the oil filled inside. The details will be described below.

The rear cushion 10 has a shock absorber body 20 that is filled with oil and can generate a damping force when the rear wheel rides on a step, and is connected to the shock absorber body 20 and compressed into the shock absorber body 20. The main components are a sub-tank 12 into which oil can flow in when a directional force is applied, and a damping force generator 40 capable of generating a damping force together with the shock absorber main body 20.

The shock absorber main body 20 includes an upper fixing portion 21 located at the upper end and fixed to the rear portion of the vehicle body, an inner cylinder 22 composed of a cylinder whose upper end is fixed to the upper fixing portion 21, and the inner cylinder 22. It has an outer cylinder 23, which is surrounded by a cylinder whose upper end is fixed to the upper fixing portion 21. The shock absorber main body 20 is further fixed to the side of the rear wheel, which is located below the cylinder lid portion 24 and the cylinder lid portion 24 which supports and closes the lower ends of the inner cylinder 22 and the outer cylinder 23. It has a lower fixing portion 25 and a round bar-shaped rod 26 extending from the lower fixing portion 25 to the inside of the inner cylinder 22. In addition, the shock absorber body 20 has a piston 27 fixed to the tip of the rod 26 and capable of advancing and retreating along the inner peripheral surface of the inner cylinder 22, and a downward force is applied to the piston 27 and the outside. It has a spring 28 provided so as to surround the circumference of the cylinder 23.

Hereinafter, "the piston 27 advances" means a direction in which the piston 27 is displaced when the spring 28 contracts, and "the piston 27 retracts" means a direction in which the piston 27 is displaced when the spring 28 extends. Say. In other words, when the piston 27 is said to move forward, it means that the piston 27 rises with respect to the inner cylinder 22, and when the piston 27 is said to move backward, the piston 27 is the inner cylinder. It means descending with respect to 22.

The upper fixing portion 21 is provided with a hole through which oil can pass, and the damping force generator 40 faces this hole. That is, the oil inside the shock absorber body 20 can flow into the damping force generator 40 via the upper fixing portion 21. The upper fixing portion 21 is integrally formed with the sub tank 12 and the damping force generator 40.

The inside of the inner cylinder 22 is filled with oil. A hole penetrating in the radial direction is formed in the lower portion of the inner cylinder 22. Therefore, when the rod 26 and the piston 27 move forward, oil flows from between the inner cylinder 22 and the outer cylinder 23 to the inside of the inner cylinder 22 below the piston 27. When the rod 26 and the piston 27 retract, oil flows from the inside of the inner cylinder 22 to between the inner cylinder 22 and the outer cylinder 23 below the piston 27.

Hereinafter, the inside of the inner cylinder 22 is referred to as an inner flow path P1, and the space between the inner cylinder 22 and the outer cylinder 23 is referred to as an outer flow path P2. The inner flow path P1 is an oil flow path formed inside the inner cylinder 22, and the outer flow path P2 is an oil flow path formed between the inner cylinder 22 and the outer cylinder 23.

The upper end of the inner cylinder 22 and the upper end of the outer cylinder 23 are connected via a damping force generator 40. Therefore, when the rod 26 and the piston 27 move forward, the oil flows from the internal flow path P1 to the external flow path P2 via the damping force generator 40. When the rod 26 and the piston 27 retract, the oil flows from the external flow path P2 to the internal flow path P1 via the damping force generator 40. A damping force is generated when the oil flows through the damping force generator 40.

The upper end of the outer cylinder 23 is covered by the upper fixing portion 21, and the lower end of the outer cylinder 22 is closed by the cylinder lid portion 24. The outer peripheral surface of the upper portion of the outer cylinder 23 is formed in a male screw shape, and an upper spring seat 31 that receives the upper end of the spring 28 is provided at the portion formed in the male screw shape.

A lower spring seat 32 that receives the lower end of the spring 28 is provided above the lower fixing portion 25. The lower fixing portion 25, the rod 26, and the piston 27 are provided so as to be movable in the vertical direction with respect to the inner cylinder 22.

See FIG. The damping force generator 40 is fixed to a case 41 which has a bottomed tubular shape and forms a part of a flow path through which oil flows, a lid 50 which closes the opening of the case 41, and the lid 50. A shaft member 60 that extends along the axis CL2 and is formed in a hollow shape, a damping force adjusting mechanism 70 that can adjust the damping force generated by adjusting the flow rate of oil flowing inside the shaft member 60, and a shaft. A compression side damping force generating portion 46 provided at the tip of the member 60 and generating a damping force when the piston 27 (see FIG. 1) moves forward, and an extension side provided at the end of the shaft member 60 and generating a damping force when the piston 27 retracts. It has a damping force generation unit 47, and an intermediate member 48 provided between the compression side damping force generation unit 46 and the extension side damping force generation unit 47 and capable of flowing oil from the inside to the outside of the shaft member 60. ..

Hereinafter, the flow path formed inside the case 41 and outside the shaft member 60 is referred to as an in-case flow path P4. The flow path formed inside the shaft member 60 is referred to as a bypass flow path P5.

The case 41 is integrally formed with the upper fixing portion 21 (see FIG. 1). Further, the case 41 is connected to the internal flow path P1, the external flow path P2, and the sub tank flow path P3 connected to the sub tank 12 (see FIG. 1). In addition, in order to facilitate understanding of the invention, the case 41 is shown by a schematic shape.

The lid body 50 has an outer lid portion 51 screwed into the case 41, and an inner lid portion 52 provided inside the outer lid portion 51 and to which the shaft member 60 is screwed. It can be said that the lid 50 closes the case 41 that forms a part of the flow path, and closes a part of the flow path.

The inner lid portion 52 has two inner lid hole portions 52a and 52b which are holes penetrating in the direction along the axis CL2. The inner lid hole portions 52a and 52b are formed at positions adjacent to each other with the axis CL2 in between.

The shaft member 60 includes a large-diameter portion 61 having a large diameter screwed into the inner lid portion 52, and compression-side and extension-side damping force generating portions 46 and 47 and an intermediate member 48 having a diameter smaller than that of the large-diameter portion 61. The small diameter portion 62 that penetrates is integrally formed.

The large-diameter portion 61 has a large-diameter portion hole 61a which is a hole penetrating in the radial direction.

The small diameter portion 62 has a hole portion 62a which is a hole penetrating in the radial direction at a position where the intermediate member 48 is provided. Further, the small diameter portion 62 has a reduced diameter portion 62b whose inner diameter is smaller than the inner diameter of the end on the tip side of the portion where the hole portion 62a is formed.

The inner peripheral surface of the boundary portion 63, which is the boundary between the large diameter portion 61 and the small diameter portion 62, is a tapered surface whose diameter continuously decreases toward the tip.

See also FIG. The damping force adjusting mechanism 70 is rotatably provided in the inner lid hole portion 52a and is rotatable in the first adjusting portion 80 and the inner lid hole portion 52b which are rotated when adjusting the flow rate of the oil flowing through the bypass flow path P5. The second adjusting portion 90 is provided in the above and is rotated when adjusting the flow rate of the oil flowing through the bypass flow path P5.

The first adjusting unit 80 is rotated by an operator when adjusting the flow rate of oil flowing from the tip to the end of the bypass flow path P5. The second adjusting unit 90 is rotated by an operator when adjusting the flow rate of oil flowing from the end to the tip of the bypass flow path P5.

Here, the flow direction of oil flowing through the bypass flow path P5 from the tip to the end (see arrow D1) is hereinafter referred to as "first direction", and the flow of oil flowing through the bypass flow path P5 from the end to the tip. The direction (see arrow D2) is hereinafter referred to as "second direction". The first direction D1 can be said to be the opposite direction to the second direction D2. When the piston 27 (see FIG. 1) advances, the oil flows through the bypass flow path P5 in the first direction D1. When the piston 27 retracts, the oil flows through the bypass flow path P5 in the second direction D2.

The damping force adjusting mechanism 70 includes a first moving member 73 that is screwed into the first adjusting portion 80 and is movable along the central axis of the first adjusting portion 80, and the first moving member 73. It has a first valve portion 74 which is supported by the above and whose tip extends to the reduced diameter portion 62b and can open and close the bypass flow path P5 in the reduced diameter portion 62b. Further, the damping force adjusting mechanism 70 is screwed into the second adjusting portion 90 and is movable along the central axis of the second adjusting portion 90, and the second moving member 75 and the second moving member 75. It has a second valve portion 76 that is supported by the member 75 and can open and close the bypass flow path P5 at the boundary portion 63. Further, the damping force adjusting mechanism 70 is housed in the second moving member 75, and is used to assist the operator to grasp that the first adjusting unit 80 has been rotated by a certain amount each time the first adjusting unit 80 is rotated by a certain amount. A second auxiliary mechanism 77 and a second moving member 73 housed in the first moving member 73 to assist the operator to grasp that the second adjusting unit 90 has been rotated by a certain amount each time the second adjusting unit 90 is rotated by a certain amount. It has an auxiliary mechanism 78 and.

Refer to FIGS. 2 to 4. The first adjusting portion 80 penetrates the first head 81 inserted into the inner lid hole portion 52a, the first male screw portion 82 formed in a male screw shape, and the second moving member 75. The first penetrating portion 83, which prevents the rotation of the second moving member 75, is integrally formed along the axis CL2 in this order.

The top surface 81a of the first head 81 is exposed to the outside. A groove into which a flat-blade screwdriver can be inserted is formed on the top surface 81a (see also FIG. 1). The operator can rotate the first adjusting portion 80 by inserting a flat-blade screwdriver into the groove formed in the top surface 81a.

The first penetrating portion 83 has a plurality of first recesses 83a formed in a groove shape along the central axis direction. The first recesses 83a are formed at predetermined intervals in the circumferential direction of the first penetrating portion 83.

The second adjusting portion 90 prevents the rotation of the first moving member 73 by penetrating the second head 91 inserted into the inner lid hole portion 52b and the first moving member 73. The penetrating portion 92 and the second male screw portion 93 formed in the shape of a male screw are integrally formed in this order along the axis CL2.

The top surface 91a of the second head 91 is exposed to the outside. A groove into which a flat-blade screwdriver can be inserted is formed on the top surface 91a (see also FIG. 1). The operator can rotate the second adjusting portion 90 by inserting a flat-blade screwdriver into the groove formed in the top surface 91a.

The second penetrating portion 92 has a plurality of second recesses 92a formed in a groove shape along the central axis direction. The second recesses 92a are formed at predetermined intervals in the circumferential direction of the second penetrating portion 92.

The first moving member 73 is a plate-shaped member having a plurality of holes, and can be moved in the central axis direction of the first adjusting portion 80 by rotating the first adjusting portion 80. The first moving member 73 has a first female screw portion 73a which is a female screw-shaped hole formed along the axis CL2 and into which the first male screw portion 82 is screwed, and a second through portion 92. A first through hole 73b through which the second through hole 73b penetrates and a first storage hole 73c in which the second auxiliary mechanism 78 is housed orthogonal to the first through hole 73b are formed. The first storage hole 73c is formed in a direction intersecting the central axis of the second adjusting portion 90.

The first valve portion 74 is a needle valve integrally formed with the first moving member 73. By moving the first valve portion 74 in the direction of the axis CL2, the opening degree of the valve portion 74, which is the size of the gap between the inner peripheral surface of the reduced diameter portion 62b and the outer peripheral surface of the valve portion 74, is changed. As a result, the flow rate of oil flowing in the first direction D1 through the bypass flow path P5 is controlled. That is, the flow rate of the oil flowing through the compression side damping force generating portion 46 is controlled by the opening degree of the first valve portion 74. As a result, the damping force generated in the compression side damping force generating unit 46 is adjusted.

The second moving member 75 is a plate-shaped member having a plurality of holes, and can be moved in the central axial direction of the second adjusting portion 90 by rotating the second adjusting portion 90. The second moving member 75 has a second female threaded portion 75a, which is a female threaded hole formed along the axis CL2 and into which a second male threaded portion 93 is screwed, and a first penetrating portion 83. A second through hole 75b through which the first through hole 75b is penetrated and a second storage hole 75c which is orthogonal to the second through hole 75b and in which the first auxiliary mechanism 77 is housed are formed. The second storage hole 75c is formed in a direction intersecting the central axis of the first adjusting portion 80.

The second valve portion 76 is integrally formed with the second moving member 75, and the outer peripheral surface has a shape along the tapered surface of the boundary portion 63. By moving the second valve portion 76 in the direction of the axis CL2, the opening degree of the second valve portion 76, which is the size of the gap between the boundary portion 63 and the second valve portion 76, is changed. The flow rate of oil flowing in the second direction D2 through the bypass flow path P5 is controlled. That is, the flow rate of the oil flowing through the extension side damping force generating portion 47 is controlled by the opening degree of the second valve portion 76. As a result, the damping force generated in the extension side damping force generation unit 47 is adjusted.

The first auxiliary mechanism 77 applies a force toward the first penetrating portion 83 by the first coil spring 77a, which is a coil spring housed in the second storage hole 75c, and the first coil spring 77a. It has a first ball 77b, which is a ball that has been made. The first auxiliary mechanism 77 is arranged between the first adjusting unit 80 and the second adjusting unit 90.

The second auxiliary mechanism 78 applies a force toward the second penetrating portion 92 by the second coil spring 78a, which is a coil spring housed in the first storage hole 73c, and the second coil spring 78a. It has a second ball 78b, which is a ball that has been made. The second auxiliary mechanism 78 is arranged between the first adjusting unit 80 and the second adjusting unit 90.

When the oil flows through the case inner flow path P4 in the first direction D1, the compression side damping force generating unit 46 becomes a predetermined resistance to generate a damping force, and the oil flows through the case inner flow path P4 in the second direction D2. That is acceptable.

When the oil flows through the case inner flow path P4 in the second direction D2, the extension side damping force generating unit 47 becomes a predetermined resistance to generate a damping force, and the oil moves the case inner flow path P4 to the first direction D1. Allow to flow.

The intermediate member 48 allows oil to flow from the in-case flow path P4 to the bypass flow path P5 between the compression side damping force generating unit 46 and the extension side damping force generating unit 47, and also allows the oil to flow from the bypass flow path P5 to the case. Allows oil to flow into the inner flow path P4.

The operation of the damping force generator 40 will be described.

See FIG. For example, when the rear wheel rides on an installation object on the road while the two-wheeled vehicle is traveling, the rod 26 and the piston 27 cause the spring 28 to be applied to the inner cylinder 22, the outer cylinder 23, the sub tank 12, and the damping force generator 40. Displace while compressing. That is, the piston 27 advances in the inner cylinder 22. The oil in the internal flow path P1 is pushed out by the piston 27 toward the damping force generator 40 via the upper fixing portion 21.

See FIG. The oil flowed from the internal flow path P1 to the damping force generator 40 flows through the case inner flow path P4 and the bypass flow path P5 along the first direction D1. The oil flowing through the flow path P4 in the case passes through the compression side damping force generating portion 46 to generate a damping force. A part of the oil that has passed through the compression side damping force generating portion 46 flows from the sub tank flow path P3 to the sub tank 12 (see FIG. 1), and the rest flows through the extension side damping force generating portion 47 to the external flow path P2. .. The extension side damping force generating unit 47 has a check valve that allows the flow of oil in the first direction D1. Therefore, the oil can be easily flowed in the first direction D1.

A part of the oil flowing through the bypass flow path P5 in the first direction D1 flows from the sub tank flow path P3 to the sub tank 12 (see FIG. 1) via the intermediate member 48, and the rest is the bypass flow path P5 or the flow path in the case. It flows to the external flow path P2 via P4.

See also FIG. The sum of the amount of oil flowing to the sub tank 12 via the in-case flow path P4 and the amount of oil flowing to the sub tank 12 through the bypass flow path P5 coincides with the volume of the rod 26 that has entered the inner cylinder 22. ..

See FIG. The flow rate of oil flowing through the bypass flow path P5 is determined by the opening degree of the first valve portion 74. The closer the first valve portion 74 is to the tip side, the smaller the gap between the reduced diameter portion 62b and the first valve portion 74, and the smaller the opening degree. On the contrary, the closer the first valve portion 74 is to the terminal side, the larger the gap between the reduced diameter portion 62b and the first valve portion 74, and the larger the opening degree.

When the opening degree is small, the flow rate of the oil flowing through the bypass flow path P5 is small, so that the flow rate of the oil flowing through the in-case flow path P4 and the compression side damping force generating portion 46 is large. Therefore, the generated damping force becomes large. When the opening degree is large, the flow rate of the oil flowing through the bypass flow path P5 increases, so that the flow rate of the oil flowing through the case inner flow path P4 and the compression side damping force generating portion 46 decreases. Therefore, the generated damping force becomes small. The magnitude of the damping force generated at this time affects the riding comfort of the vehicle.

The opening degree of the bypass flow path P5 can be adjusted by rotating the first adjusting unit 80. The first moving member 73 is screwed into the first adjusting portion 80 and is restricted from being rotated by the second adjusting portion 90. Therefore, the first moving member 73 is displaced in the direction of the axis CL2 by rotating the first adjusting portion 80. Since the first valve portion 74 is integrally formed with the first moving member 73, when the first moving member 73 is displaced in the direction of the axis CL2, the first valve portion 74 also moves in the same direction. Displace. That is, by rotating the first adjusting portion 80, the first valve portion 74 is displaced in the direction of the axis CL2, and the opening degree of the bypass flow path P5 can be adjusted.

See FIGS. 2, 4, and 5A-5C. 5A to 5C show a state in which the first penetrating portion 83 is expanded. By rotating the first adjusting portion 80, the first penetrating portion 83 is also rotated. As shown in FIGS. 4 and 5A to 5C, the first penetrating portion 83 connects the first recess 83a and the first recesses 83a and 83a adjacent to the first adjusting portion 80 in the circumferential direction. 1 has a general surface portion 83b (a part of the outer peripheral surface of the first penetrating portion 83). When the first general surface portion 83b gets over the first ball 77b, the first coil spring 77a is most compressed. At this time, the largest reaction force is applied to the first penetrating portion 83, and the force required to rotate the first penetrating portion 83 is the largest. Further, by rotating the first through portion 83, when the first recess 83a comes to a position facing the second storage hole 75c, the force required to rotate the first through portion 83 becomes small. , The first penetrating portion 83 can be easily rotated. Further, the vibration when the first ball 77b fits into the first recess 83a is transmitted to the operator. From the change in resistance and / or vibration, the operator can recognize that the first penetrating portion 83 (first adjusting portion 80) has been rotated by a predetermined amount.

See FIG. The advancing rod 26 and the piston 27 retreat by receiving a force from the spring 28. A hole is formed in the lower part of the inner flow path P1 and is connected to the outer flow path P2. Therefore, when the piston 27 retracts, the oil in the internal flow path P1 is pushed out to the external flow path P2. The oil in the external flow path P2 flows toward the damping force generator 40.

See FIG. The oil flowed from the external flow path P2 to the damping force generator 40 flows through the case inner flow path P4 and the bypass flow path P5 along the second direction D2. The oil flowing through the flow path P4 in the case passes through the extension side damping force generating portion 47 to generate a damping force. The oil that has passed through the extension side damping force generating portion 47 passes through the compression side damping force generating portion 46 and flows into the internal flow path P1. The compression side damping force generating unit 46 has a check valve that allows the flow of oil in the second direction D2. Therefore, the oil can be easily flowed in the second direction D2.

The oil flowing in the second direction D2 through the bypass flow path P5 flows from the tip of the bypass flow path P5 to the internal flow path P1.

See also FIG. When the rod 26 retracts, oil flows from the sub tank 12 to the inner cylinder 22 via the damping force generator 40. The amount of oil flowing into the inner cylinder 22 coincides with the volume of the rod 26 retracted from the inner cylinder 22.

See FIG. The flow rate of oil flowing through the bypass flow path P5 is determined by the opening degree of the second valve portion 76. Since the gap between the boundary portion 63 and the second valve portion 76 becomes smaller as the second valve portion 76 is located closer to the tip end side, the opening degree of the second valve portion 76 becomes smaller. On the other hand, as the second valve portion 76 is located closer to the terminal side, the gap between the boundary portion 63 and the second valve portion 76 becomes larger, so that the opening degree of the second valve portion 76 becomes larger.

When the opening degree is small, the flow rate of the oil flowing through the bypass flow path P5 is small, so that the flow rate of the oil flowing through the in-case flow path P4 and the extension side damping force generating portion 47 is large. Therefore, the generated damping force becomes large. When the opening degree is large, the flow rate of the oil flowing through the bypass flow path P5 increases, so that the flow rate of the oil flowing through the in-case flow path P4 and the extension side damping force generating portion 47 decreases. Therefore, the generated damping force becomes small. The magnitude of the damping force generated at this time affects the riding comfort of the vehicle.

The opening degree of the bypass flow path P5 can be adjusted by rotating the second adjusting unit 90. The second moving member 75 is screwed into the second adjusting portion 90 and is restricted from being rotated by the first adjusting portion 80. Therefore, the second moving member 75 is displaced in the direction of the axis CL2 by rotating the second adjusting portion 90. Since the second valve portion 76 is integrally formed with the second moving member 75, when the second moving member 75 is displaced in the direction of the axis CL2, the second valve portion 76 is provided on the second moving member 75. The second valve portion 76 is also displaced in the direction of the axis CL2. That is, by rotating the second adjusting portion 90, the second valve portion 76 is displaced in the axial direction, and the opening degree of the bypass flow path P5 can be adjusted.

See FIGS. 2, 4, and 5A-5C. 5A to 5C show the second penetrating portion 92 in an expanded state. By rotating the second adjusting portion 90, the second penetrating portion 92 is also rotated. As shown in FIGS. 4 and 5A to 5C, the second penetrating portion 92 connects the second recess 92a and the second recesses 92a and 92a adjacent to the second adjusting portion 90 in the circumferential direction. It has 2 general surface portions 92b (a part of the outer peripheral surface of the second through portion 92). When the second general surface portion 92b gets over the second ball 78b, the second coil spring 78a is most compressed. At this time, the largest reaction force is applied to the second penetrating portion 92, and the force required to rotate the second penetrating portion 92 is the largest. Further, when the second recess 92a comes to a position facing the first storage hole 73c by rotating the second penetration portion 92, the force required to rotate the second penetration portion 92 becomes smaller. , The second penetrating portion 92 can be easily rotated. Further, the vibration when the second ball 78b fits into the second recess 92a is transmitted to the operator. From the change in resistance and / or vibration, the operator can recognize that the second penetrating portion 92 (second adjusting portion 90) has been rotated by a predetermined amount.

The damping force generator 40 described above will be summarized below.

The damping force generator 40 includes a lid 50 that closes a part of the flow paths P4 and P5 through which oil can flow, and a lid 50 that is rotatably provided on the lid 50 and a part of which is a male screw. A first male screw portion 82 formed in a shape, a first adjusting portion 80 that is rotated when adjusting the flow rate of oil flowing in the first direction D1, and a lid 50 that are rotatably provided. A second male screw portion 93, which is partly formed in a male screw shape, is a second adjustment portion that is rotated when adjusting the flow rate of oil flowing in the second direction D2, which is the direction opposite to the first direction D1. The 90 and the first female threaded portion 73a to which the first male threaded portion 82 is screwed are formed, and the second penetrating portion 92 formed in the second adjusting portion 90 penetrates to rotate. Is prevented, and a first moving member 73 that can move along the axis of the first adjusting unit 80 by rotating the first adjusting unit 80, and a flow path P5 supported by the first moving member 73. A first valve portion 74 capable of adjusting the opening degree of the lid and a second female screw portion 75a into which the second male screw portion 93 is screwed are formed, and the first adjusting portion 80 is formed. A second moving member 75, which is prevented from rotating by penetrating the first penetrating portion 83 and can move along the axis of the second adjusting portion 90 by rotating the second adjusting portion 90, and this It is housed in a second valve portion 76 that is supported by the second moving member 75 and can adjust the opening degree of the flow path P5, and a second storage hole 75c formed in the second moving member 75. A first auxiliary mechanism 77 that is provided so as to be in contact with the first adjusting unit 80 and assists the operator to grasp that the first adjusting unit 80 has been rotated by a certain amount each time the first adjusting unit 80 is rotated by a certain amount. And have.

The damping force generator 40 has a first auxiliary mechanism 77 for assisting the operator to grasp that the rotation has been performed by a certain amount. Therefore, the operator can grasp that each time the first adjusting unit 80 is rotated by a certain amount, the first adjusting unit 80 is rotated by a certain amount. Since the amount of rotation of the first adjusting unit 80 can be easily grasped, the workability of the damping force adjusting work can be improved. Further, in the damping force generator 40, the first auxiliary mechanism 77 is housed in the second moving member 75. For example, the first auxiliary mechanism 77 can be arranged more compactly in the radial direction as compared with the case where the first auxiliary mechanism 77 is stored in the storage hole formed in the lid 50. Therefore, by adopting such a form, it is possible to provide a damping force generator 40 that can improve workability while being compact.

Further, the damping force generator 40 has a second auxiliary mechanism 78. The second auxiliary mechanism 78 is housed in the first storage hole 73c formed in the first moving member 73 and is provided so as to be in contact with the second adjusting portion 90, and the second adjusting portion 78 is provided. Every time the 90 is rotated by a certain amount, the operator is made to know that the second adjusting unit 90 has been rotated by a certain amount.

As a result, the amount of rotation of the second adjusting unit 90 can be easily grasped, so that the workability of the damping force adjusting work can be improved. Further, the second auxiliary mechanism 78 can also be arranged compactly in the radial direction.

Further, on the outer peripheral surface of the first adjusting portion 80, a first recess 83a that is recessed toward the central axis of the first adjusting portion 80 and to which the first auxiliary mechanism 77 can come into contact is provided as a second adjusting portion. It is formed in a groove shape along the central axis of 80. The first auxiliary mechanism 77 is directed toward the outer peripheral surface of the first adjusting portion 80 by the first coil spring 77a, which is a coil spring housed in the second storage hole 75c, and the first coil spring 77a. Includes a first ball 77b, which is a force-fed ball.

Further, on the outer peripheral surface of the second adjusting portion 90, a second recess 92a that is recessed toward the central axis of the second adjusting portion 90 and to which the second auxiliary mechanism 78 can come into contact is provided as a second adjusting portion. It is formed in a groove shape along the central axis of 90. The second auxiliary mechanism 78 is directed toward the outer peripheral surface of the second adjusting portion 90 by the second coil spring 78a, which is a coil spring housed in the first storage hole 73c, and the second coil spring 78a. Includes a second ball 78b, which is a force-fed ball.

The first auxiliary mechanism 77 has a first coil spring 77a and a first ball 77b, and the second auxiliary mechanism 78 has a second coil spring 78a and a second ball 78b. The first recess 83a with which the first ball 77b abuts is formed in the first adjusting portion 80, and the second recess 92a with which the second ball 78b abuts is formed in the second adjusting portion 90. ing. By bringing the first ball 77b into contact with the first recess 83a and the second ball 78b in contact with the second recess 92a, the plate is formed on the first adjusting portion 80 and the second adjusting portion 90. The life of the damping force generator 40 can be extended as compared with the case where the springs are brought into direct contact with each other.

Further, in the damping force generator 40, the first male screw portion 82 and the first recess 83a are integrally formed in one member. Further, the second male screw portion 93 and the second recess 92a are integrally formed in one member. As a result, the damping force generator 40 can be configured with a small number of parts, so that the assembling property can be improved.

Further, the damping force generator 40 has a first recess 83a that is recessed toward the central axis of the first adjusting portion 80 and that the first auxiliary mechanism 77 can come into contact with the outer peripheral surface of the first penetrating portion 83. Is formed in a groove shape. Further, on the outer peripheral surface of the second penetrating portion 92, a second recess 92a that is recessed toward the central axis of the second adjusting portion 90 and to which the second auxiliary mechanism 78 can come into contact is formed in a groove shape. There is.

Further, the first penetrating portion 83 includes a groove-shaped first recess 83a capable of abutting the first auxiliary mechanism 77, and the second penetrating portion 92 has a second auxiliary mechanism 78. It is provided with a groove-shaped second recess 92a that can be brought into contact with it. The first penetrating portion 83 also functions as a portion for suppressing the rotation of the second moving member 75, and the second penetrating portion 92 serves as a portion for suppressing the rotation of the first moving member 73. Also works. By making such a form, a first adjusting portion is formed as compared with a case where a recess is formed in a portion different from the first penetrating portion 83 and a recess is formed in a portion different from the second penetrating portion 92. Since the 80 and the second adjusting portion 90 can be shortened in the axial direction, it becomes easy to reduce the size of the damping force generator 40.

<Example 2>
Next, Example 2 will be described with reference to the drawings.

See FIG. In the damping force generator 40A according to the second embodiment, the configurations of the first auxiliary mechanism 177 and the second auxiliary mechanism 178 are different from those of the first auxiliary mechanism 77 and the second auxiliary mechanism 78. Other basic configurations are common to the damping force generator 40. Regarding the configuration common to the damping force generator 40, reference numerals are used and detailed description thereof will be omitted as appropriate.

The damping force generator 40A has a first recess 83a formed on the outer peripheral surface of the first adjustment portion 80, which is recessed toward the central axis of the first adjustment portion 80 and to which the first auxiliary mechanism 177 can abut. The first auxiliary mechanism 177 is composed of a leaf spring housed in the second storage hole 75c. Further, the first tip portion 177a, which is the tip of the first auxiliary mechanism 177, has a convex shape protruding in a V shape along the first concave portion 83a formed in a V shape.

Further, on the outer peripheral surface of the second adjusting portion 90, a second recess 92a that is recessed toward the central axis of the second adjusting portion 90 and to which the second auxiliary mechanism 178 can come into contact is formed, and the second recess 92a is formed. The auxiliary mechanism 178 is composed of a leaf spring housed in the first storage hole 73c. Further, the second tip portion 178a, which is the tip of the second auxiliary mechanism 178, has a convex shape protruding in a V shape along the second concave portion 92a formed in a V shape.

The damping force generator 40A described above also exerts the predetermined effect of the present invention.

Further, the first auxiliary mechanism 177 and the second auxiliary mechanism 178 provided in the damping force generator 40A are composed of leaf springs. By using such an auxiliary mechanism, the number of parts can be reduced as compared with the case where the coil spring and the ball are used.

Further, the first tip portion 177a has a convex shape along the first concave portion 83a, and the second tip portion 178a has a convex shape along the second concave portion 92a. As a result, the force required to remove the first tip portion 177a from the first recess 83a can be increased, and the force required to remove the second tip portion 178a from the second recess 92a can be increased. be able to. As a result, it becomes easy for the operator to recognize that a predetermined amount of rotation has been performed, although the configuration is simple.

<Example 3>
Next, Example 3 will be described with reference to the drawings.

See FIG. 7. In the damping force generator 40B according to the third embodiment, the configurations of the first auxiliary mechanism 277 and the second auxiliary mechanism 278 are different from the configurations of the damping force generators 40 and 40A. Other basic configurations are common to the damping force generator 40. Regarding the configuration common to the damping force generator 40, reference numerals are used and detailed description thereof will be omitted as appropriate.

The damping force generator 40B has a first recess 83a formed on the outer peripheral surface of the first adjustment portion 80, which is recessed toward the central axis of the first adjustment portion 80 and to which the first auxiliary mechanism 277 can abut. The first auxiliary mechanism 277 is composed of a leaf spring housed in the second storage hole 75c. Further, the first tip portion 277a, which is the tip of the first auxiliary mechanism 277, can be separated from the first recess 83a when facing the first recess 83a.

Further, on the outer peripheral surface of the second adjusting portion 90, a second recess 92a is formed which is recessed toward the central axis of the second adjusting portion 90 and with which the second auxiliary mechanism 278 can come into contact with the second adjusting portion 90. The auxiliary mechanism 278 is composed of a leaf spring housed in the first storage hole 73c. Further, the second tip portion 278a, which is the tip of the second auxiliary mechanism 278, can be separated from the second recess 92a when facing the second recess 92a.

The damping force generator 40B described above also exerts the predetermined effect of the present invention.

Further, the first auxiliary mechanism 277 and the second auxiliary mechanism 278 provided in the damping force generator 40B are composed of leaf springs. By using such an auxiliary mechanism, the number of parts can be reduced as compared with the case where the coil spring and the ball are used.

Further, the first tip portion 277a can be separated from the first recess 83a when facing the first recess 83a, and the second tip portion 278a faces the second recess 92a. , Can be separated from the second recess 92a. As a result, the load applied to the first auxiliary mechanism 277 and the second auxiliary mechanism 278 can be reduced, so that the life of the damping force generator 40B can be extended.

In the above description, an example in which the damping force generator according to the present invention is mounted on the rear cushion of a two-wheeled vehicle has been described, but the present invention is not limited to this embodiment. The damping force generator according to the present invention can be applied to saddle-riding vehicles other than motorcycles and front forks.

In the above embodiment, the oil flow direction when the piston is advanced (compressed) is set to the first direction, and the oil flow direction when the piston is retracted (extended) is set to the second direction, but these are reversed. There may be. That is, it is also possible to set the oil flow direction when the piston is retracted as the first direction and the oil flow direction when the piston is forward as the second direction.

Furthermore, each of the above examples can be combined as appropriate. For example, when the damping force generator of the present invention is provided with two auxiliary mechanisms, one of the two auxiliary mechanisms has a form having a coil spring and a ball described in the first embodiment, and the other auxiliary mechanism. It is also possible to construct the leaf spring having a bent tip as described in the second embodiment. In addition to this, the two auxiliary mechanisms can have different configurations.

The present invention is not limited to the examples as long as the actions and effects of the present invention are exhibited.

The damping force generator of the present invention is suitable for a rear cushion of a two-wheeled vehicle.

40, 40A, 40B ... Damping force generator 50 ... Lid body 73 ... First moving member, 73a ... First female screw portion, 73c ... First storage hole 74 ... First valve portion 75 ... Second movement Member, 75a ... 2nd female threaded portion, 75c ... 2nd storage hole 76 ... 2nd valve portion 77, 177, 277 ... 1st auxiliary mechanism, 77a ... 1st coil spring, 77b ... 1st ball 78, 178, 278 ... 2nd auxiliary mechanism, 78a ... 2nd coil spring, 78b ... 2nd ball 80 ... 1st adjusting part 82 ... 1st male threaded part 83 ... 1st penetrating part, 83a ... 1st recess 90 ... 2nd adjusting portion 92 ... 2nd penetrating portion, 92a ... 2nd recess 93 ... 2nd male threaded portion 177a, 277a ... 1st tip portion 178a, 278a ... 2nd tip portion D1 ... 1st direction D2 ... 2nd direction P4, P5 ... Flow path

Claims (12)

A case that forms part of a flow path that allows oil to flow inside ,
With the lid closing the opening of this case ,
A first adjusting portion that is rotatably provided on the lid and is partially formed in a male screw shape, and is rotated when adjusting the flow rate of the oil flowing in the first direction. When,
A second male-threaded portion that is rotatably provided on the lid and is partially formed in a male-screw shape, and allows the flow rate of the oil to flow in a second direction opposite to the first direction. A second adjustment unit that rotates when adjusting,
A first female threaded portion into which the first male threaded portion is screwed is formed, and a second penetrating portion formed in the second adjusting portion penetrates to prevent rotation. A first moving member that can be moved along the axis of the first adjusting portion by rotating the first adjusting portion, and
A first valve portion supported by the first moving member and capable of adjusting the opening degree of the flow path,
A second female threaded portion into which the second male threaded portion is screwed is formed, and a first penetrating portion formed in the first adjusting portion penetrates to prevent rotation. A second moving member that can be moved along the axis of the second adjusting portion by rotating the second adjusting portion, and
A second valve portion supported by the second moving member and capable of adjusting the opening degree of the flow path,
It is housed in a second storage hole formed in the second moving member and is provided so as to be in contact with the first adjusting portion, and works every time the first adjusting portion is rotated by a certain amount. The first auxiliary mechanism for assisting a person to grasp that a certain amount of rotation has occurred,
It is housed in a first storage hole formed in the first moving member and is provided so as to be in contact with the second adjusting portion, and works every time the second adjusting portion is rotated by a certain amount. It has a second auxiliary mechanism to assist the person in grasping that the person has rotated a certain amount.
On the outer peripheral surface of the first adjusting portion, a first recess is formed which is recessed toward the central axis of the first adjusting portion and with which the first auxiliary mechanism can come into contact.
The first recess is formed in a groove shape on the outer peripheral surface of the first penetrating portion.
On the outer peripheral surface of the second adjusting portion, a second recess is formed which is recessed toward the central axis of the second adjusting portion and with which the second auxiliary mechanism can come into contact.
The second recess is a damping force generator formed in a groove shape on the outer peripheral surface of the second penetrating portion . Before SL first auxiliary mechanism, said a first coil spring is a second coil spring which is housed in the housing hole, the force toward the outer peripheral surface of the first adjusting portion by the first coil spring The damping force generator according to claim 1, further comprising a first ball, which is a ball to which the ball is attached. Before SL first auxiliary mechanism is constituted by the second housing is a plate spring in the hole, the damping force generating device according to claim 1. The damping force generator according to claim 3, wherein the first tip portion, which is the tip of the first auxiliary mechanism, has a convex shape along the first concave portion. The damping force generating device according to claim 3, wherein the first tip portion, which is the tip of the first auxiliary mechanism, can be separated from the first recess when facing the first recess. Said first externally threaded portion, wherein the first recess, one of the member are integrally formed, the damping force generating device according to any one of claims 1 to 5. Before Stories second auxiliary mechanism, a force directed to the second coil spring is a first coil spring housed in the housing bore, the outer peripheral surface of the second adjusting portion by the second coil spring The damping force generator according to claim 1 , further comprising a second ball, which is a ball to which the ball is attached. Before Stories second auxiliary mechanism is constituted by the first housing and a plate spring in the hole, the damping force generating device according to claim 1. The damping force generator according to claim 8 , wherein the second tip portion, which is the tip of the second auxiliary mechanism, exhibits a convex shape along the second concave portion. The damping force generating device according to claim 8 , wherein the second tip portion, which is the tip of the second auxiliary mechanism, can be separated from the second recess when facing the second recess. Wherein the second external thread portion, and the second recess, is integrally formed in one member, the damping force generating device according to claim 1. A case that forms part of a flow path that allows oil to flow inside ,
With the lid closing the opening of this case ,
A first adjusting portion that is rotatably provided on the lid and is partially formed in a male screw shape, and is rotated when adjusting the flow rate of the oil flowing in the first direction. When,
A second male-threaded portion that is rotatably provided on the lid and is partially formed in a male-screw shape, and allows the flow rate of the oil to flow in a second direction opposite to the first direction. A second adjustment unit that rotates when adjusting,
A first female screw portion into which the first male screw portion is screwed is formed, and a second penetrating portion formed in the second adjusting portion penetrates to prevent rotation. A first moving member that can be moved in the central axis direction of the first adjusting portion by rotating the first adjusting portion, and
A first valve portion supported by the first moving member and capable of adjusting the opening degree of the flow path,
A second female threaded portion into which the second male threaded portion is screwed is formed, and a first penetrating portion formed in the first adjusting portion penetrates to prevent rotation. A second moving member that can be moved in the central axis direction of the second adjusting portion by rotating the second adjusting portion, and
A second valve portion supported by the second moving member and capable of adjusting the opening degree of the flow path,
It is housed in a second storage hole formed in the second moving member and is provided so as to be in contact with the first adjusting portion, and works every time the first adjusting portion is rotated by a certain amount. The first auxiliary mechanism for assisting a person to grasp that a certain amount of rotation has occurred,
It is housed in a first storage hole formed in the first moving member and is provided so as to be in contact with the second adjusting portion, and works every time the second adjusting portion is rotated by a certain amount. It has a second auxiliary mechanism to assist the person in grasping that the person has rotated a certain amount.
On the outer peripheral surface of the first adjusting portion, a first recess that is recessed toward the central axis of the first adjusting portion and with which the first auxiliary mechanism can abut is located at the center of the first adjusting portion. Formed in a groove along the axis,
On the outer peripheral surface of the second adjusting portion, a second recess that is recessed toward the central axis of the second adjusting portion and with which the second auxiliary mechanism can abut is located at the center of the second adjusting portion. Formed in a groove along the axis,
The first auxiliary mechanism exerts a first coil spring, which is a coil spring housed in the second storage hole, and a force toward the outer peripheral surface of the first adjusting portion by the first coil spring. Including the first ball, which is the given ball,
The second auxiliary mechanism exerts a second coil spring, which is a coil spring housed in the first storage hole, and a force toward the outer peripheral surface of the second adjusting portion by the second coil spring. Including the second ball, which is the given ball,
The first male screw portion and the first recess are integrally formed in one member.
A damping force generator in which the second male screw portion and the second recess are integrally formed in one member.

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