JP2019059328A - Steering damper device for straddle type vehicle - Google Patents

Abstract

To provide a steering damper device for a straddle type vehicle, in which a pump unit including a pump case including a cylinder hole having closed ends and a piston forming first and second oil chambers with the pump case and slidably fitted into the cylinder hole is disposed between a steering component and a vehicle body frame, and to downsize the pump unit and easily secure the pump unit arrangement space around a steering.SOLUTION: A single pump unit 21 including a piston rod 27 is arranged at one of right and left sides of an imaginary planar surface extending through a rotation center of a steering 13 in the vehicle front to back direction. The piston rod 27 is provided coaxially with a piston 26 to extend through an end of a pump case 23 in a liquid-tight state. A first oil chamber 24 and a second oil chamber 25 are connected by tubular passages 34, 35 having flexibility. An absorber 56 configured to absorb expansion and shrinkage of damper oil is connected to the tubular passages 34, 35.SELECTED DRAWING: Figure 3

Description

  According to the present invention, a pump case having a cylinder hole closed at both ends and first and second oil chambers filled with damper oil are formed between the pump case and slidably fitted in the cylinder hole. The present invention relates to a steering damper device for a saddle-ride type vehicle, in which a pump unit having a piston is provided between a steering component constituting a part of steering and a vehicle body frame.

  Patent Document 1 discloses a pump unit interposed between a body frame and a front fork of a motorcycle.

Unexamined-Japanese-Patent No. 5-201377

  However, in the case disclosed in Patent Document 1, the pump unit has a piston rod protruding from one end of the pump case and a rod-shaped adjuster protruding from the other end of the pump case. If the function is enhanced, the pump unit becomes axially long, which makes it difficult to secure a space for disposing the pump unit around steering.

  The present invention has been made in view of such circumstances, and aims to reduce the size of the pump unit and to easily secure the arrangement space of the pump unit around the steering. Intended to be provided.

  In order to achieve the above object, according to the present invention, the cylinder bore is formed between a pump case having a cylinder bore closed at both ends, and first and second oil chambers filled with damper oil, with the pump casing. A steering damper device for a saddle-ride type vehicle, wherein a pump unit including a piston slidably fitted to the steering wheel is provided between a steering component constituting a part of a steering and a vehicle body frame; A single pump unit having a piston rod coaxially connected in a fluid-tight manner through one end of the pump case, one of the pump case and the piston rod being attached to the vehicle body frame and the pump case and the pump case While the other of the piston rods is attached to the steering component, the front The first and second oil chambers are disposed on the left and right sides of a virtual plane extending in the longitudinal direction of the vehicle through the center of rotation of the steering, and the first and second oil chambers are connected via a flexible pipe to expand the damper oil and It is a first feature that an absorber that absorbs contraction is connected to the conduit.

  Further, according to the present invention, in addition to the configuration of the first feature, an annular bush serving as a seal between the first and second oil chambers is interposed between the outer periphery of the piston and the inner periphery of the cylinder hole. The second feature.

  According to the present invention, in addition to the configuration of the first or second feature, the steering component is a front fork supporting a front wheel at a lower end, and the pump case is attached to a bridge of the front fork A third feature is that a piston rod is attached to the vehicle body frame.

  According to the present invention, in addition to the configuration of the first or second feature, the steering component is a front fork supporting a front wheel at a lower end portion, and the piston rod is attached to a bridge of the front fork A fourth feature is that a pump case is attached to the vehicle body frame.

  The present invention is fifthly characterized in that, in addition to any one of the configurations of the first to fourth features, a hydraulic pressure adjustment mechanism disposed separately from the pump unit is interposed in the pipe line. .

  According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect, the hydraulic pressure adjustment mechanism is attached to the steering wheel and the vehicle body frame on the vehicle body frame side.

  The present invention is, in addition to the configuration of the fifth feature, that the steering component is a front fork that pivotally supports a front wheel at a lower end, and the hydraulic pressure adjustment mechanism is attached to a bridge of the front fork 7 features.

  According to the present invention, in addition to any of the configurations of the fifth to seventh features, the hydraulic pressure adjustment mechanism includes a first orifice for throttling the flow of the damper oil from the first oil chamber to the second oil chamber A second orifice for throttling the flow of the damper oil from the second oil chamber to the first oil chamber, and a damping force adjusting valve capable of changing a flow area of a bypass path bypassing the first and second orifices; An eighth feature is to provide.

  According to a ninth feature of the present invention, in addition to any of the fifth to eighth features, the hydraulic pressure adjustment mechanism has an electric actuator for changing the degree of adjustment.

  Furthermore, according to the present invention, in addition to any of the configurations of the fifth to ninth features, the absorber leads to a sub tank attached to the pump case or the hydraulic pressure adjustment mechanism, and the first and second oil chambers. An absorber piston slidably fitted to the sub-tank so as to form an auxiliary oil chamber and an air chamber between the sub-tank and a bladder having a peripheral portion pinched by the sub-tank. It features.

  According to the above-mentioned feature of the present invention, by arranging a single pump unit on one side in the vehicle width direction, the pump unit can be simplified and downsized to facilitate the arrangement space of the pump unit around the steering. As the first and second oil chambers are connected by a flexible pipe, the displacement of the pump case at the time of steering can be followed by expansion and contraction of the pipe, so that oil can be secured. The absorber absorbing the expansion and contraction of the pressure sensor can absorb the pressure change in the steering damper device accompanying the temperature change.

  In particular, according to the second aspect of the present invention, by using an inexpensive bush to seal between the first and second oil chambers in which the same damper oil is accommodated, the space between the first and second oil chambers can be obtained. While not perfect, the cost can be reduced while sealing.

  In particular, according to the fifth feature of the present invention, since the pump unit and the hydraulic pressure adjustment mechanism are separately disposed, the pump unit can be miniaturized.

  In particular, according to the sixth or seventh aspect of the present invention, the hydraulic pressure adjustment mechanism can be disposed near the pump unit to shorten the pipeline.

  In particular, according to the eighth aspect of the present invention, since the hydraulic pressure adjustment mechanism is configured to be divided into the first and second orifices and the damping force adjustment valve, the structure thereof can be simplified.

  In particular, according to the ninth aspect of the present invention, since the degree of adjustment of the hydraulic pressure adjustment mechanism is changed by the electric actuator, the damping force can be easily changed even while the saddle-ride type vehicle is traveling.

FIG. 1 is a right side view of a motorcycle according to a first embodiment. It is the figure which looked at the steering damper apparatus from 2 arrow direction of FIG. It is sectional drawing which simplifies and shows the structure of a steering damper apparatus. Fig. 6 is a right side view of a motorcycle according to a second embodiment. It is line 5-5 in FIG. 4 sectional drawing. It is a figure corresponding to Drawing 2 of a steering damper device of a 3rd embodiment. It is a figure corresponding to Drawing 2 of a steering damper device of a 4th embodiment. It is a figure corresponding to Drawing 2 of a steering damper device of a 5th embodiment.

  Embodiments of the present invention will be described with reference to the attached drawings. In the following description, upper, lower, right and left and front and rear refer to directions as viewed from a passenger on a motorcycle.

  A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, in FIG. 1, a head pipe 14 at the front end of a vehicle body frame F of a motorcycle which is a saddle-ride type vehicle is A front fork 11 having a bridge 11a and a bottom bridge 11b for pivotally supporting a front wheel WF, and a steering handle 12 which constitutes a steering 13 together with the front fork 11 are supported so as to be steerable. A fuel tank 15 mounted on the vehicle body frame F so as to be disposed between the front wheel WF and the rear wheel WR so as to be disposed between the front wheel WF and the rear wheel WR, and a fuel tank 15 disposed above the engine E; A passenger seat 16 disposed behind the fuel tank 15 is supported by the vehicle body frame F.

  In FIG. 2, a steering damper device 20 is provided between a steering component constituting a part of the steering 13 and a vehicle body frame F. The steering component is the front fork 11 in this embodiment, and a steering damper device 20 is provided between a top bridge 11 a of the front fork 11 and the vehicle body frame F.

  The steering damper device 20 is disposed on one side (left side in the first embodiment) of a virtual plane VP extending in the longitudinal direction of the vehicle through the center of rotation C of the steering 13, ie, the axis of the head pipe 14. Single pump unit 21 is provided.

  In FIG. 3, the pump unit 21 has a pump case 23 having a cylinder hole 22 closed at both ends, a piston 26 slidably fitted in the cylinder hole 22 and a piston 26 coaxially connected to the piston 26. The piston rod 27 penetrates one end (the front end in the first embodiment) of the pump case 23, and the piston 26 is filled with the first oil chamber 24 filled with the damper oil and the damper oil The second oil chamber 25 and the pump case 23 are formed.

  An annular bush 28 is interposed between the outer periphery of the piston 26 and the inner periphery of the cylinder hole 22 so as to seal between the first oil chamber 24 and the second oil chamber 25. In this embodiment, an annular bush 28 slidably mounted on the outer peripheral surface of the piston 26 in sliding contact with the inner peripheral surface of the cylinder hole 22. An annular seal member 29 is mounted between one end of the pump case 23 and the piston rod 27.

  At the other end (the rear end in the first embodiment) of the pump case 23, a mounting projection 23a is provided. On the other hand, a bracket 31 is provided on the upper surface of the main frame 18 on the left side in the vehicle width direction of the pair of left and right main frames 18 that constitute a part of the vehicle body frame F and extend backward from the head pipe 14 The attachment protrusion 23 a is rotatably attached to the bracket 31 via a pin 32. Further, the projecting end 27a of the piston rod 27 from the pump case 23 is rotatably mounted on the top surface of the top bridge 11a via a pin 33. That is, the pump unit 21 is provided between the upper surface of the top bridge 11 a of the front fork 11 and the upper surface of the main frame 18 on the left side of the vehicle body frame F.

  The first and second oil chambers 24 and 25 in the pump unit 21 are connected via flexible pipes, for example, rubber hoses 34 and 35. Of the first and second oil chambers 24 and 25, the pump case 23 is provided with a connection pipe portion 23 b communicating with the first oil chamber 24 and a connection pipe portion 23 c communicating with the second oil chamber 25. One end of the rubber hose 34 is connected to the connection pipe 23b, and one end of the rubber hose 35 is connected to the connection pipe 23c.

  A hydraulic pressure adjustment mechanism 36 disposed separately from the pump unit 21 is interposed in the rubber hoses 34 and 35. A case 37 of the hydraulic pressure adjustment mechanism 36 is attached to the vehicle body frame F side of the steering 13 and the vehicle body frame F, and in this embodiment, between the front upper surfaces of the pair of main frames 18 The case 37 is attached to the support plate 38 constructed.

  Moreover, a pair of connecting pipe portions 37a and 37b are provided on the side walls on the left and right sides of the case 37, and the other end of the rubber hose 34 is connected to the connecting pipe portion 23b of the pump unit 21 at one end. The part is connected to the connection pipe part 37a, and the other end of the rubber hose 35 whose one end is connected to the connection pipe part 23c of the pump unit 21 is connected to the connection pipe part 37b.

  The hydraulic pressure adjustment mechanism 36 includes a first orifice 41 for throttling the flow of the damper oil from the first oil chamber 24 to the second oil chamber 25 and a flow from the second oil chamber 25 to the first oil chamber 24. A second orifice 42 for throttling the flow of the damper oil, and a damping force adjustment valve 44 capable of changing the flow area of the bypass 43 bypassing the first and second orifices 41 and 42 are provided.

  In the case 37 of the hydraulic pressure adjustment mechanism 36, an oil chamber hole 45 which extends in the longitudinal direction of the vehicle and closes both ends, and the pump unit 21 of the pair of connecting pipe portions 37a and 37b of the case 37. The first oil passage 46 leading to the connection pipe portion 37a leading to the first oil chamber 24 and the connection leading to the second oil chamber 25 of the pump unit 21 among the pair of connection pipe portions 37a and 37b of the case 37 A second oil passage 47 communicating with the pipe portion 37b is formed. In the middle of the oil chamber hole 45 in the longitudinal direction, a partition 50 for separating the inside of the oil chamber hole 45 into a third oil chamber 48 communicating with the first passage 46 and a fourth oil chamber 49 communicating with the second passage 47 The first and second orifices 41 and 42 are formed in the partition 50.

  Moreover, the protrusion of the support rod 51 penetrating the center of the partition 50 toward the third oil chamber 48 allows the flow of oil from the third oil chamber 47 to the first orifice 41. A first leaf valve 52 for preventing the flow of oil from the third oil chamber 47 to the second orifice 42 is mounted, and a protrusion of the support rod 51 to the fourth oil chamber 49 side is a second valve. A second leaf valve 53 is mounted which permits the flow of oil from the fourth oil chamber 49 to the orifice 42 but blocks the flow of oil from the fourth oil chamber 49 to the first orifice 41. That is, the first orifice 41 is for throttling the flow of oil from the first oil chamber 24 to the second oil chamber 25, and the second orifice 42 is for the oil from the second oil chamber 25 to the first oil chamber 24. It is what squeezes the flow.

  The bypass path 43 is formed in the case 37 so as to connect the first and second passages 46 and 47 by bypassing the first and second orifices 41 and 42, and changes the flow area of the bypass path 43. The damping force adjusting valve 44 which can be made is a butterfly valve having a valve shaft 54 rotatably supported on the case 37.

  The hydraulic pressure adjustment mechanism 36 includes an electric actuator 55 for changing the degree of adjustment, and the electric actuator 55 is a stepping motor or a solenoid connected to the valve shaft 54.

  The steering damper device 20 also includes an absorber 56 connected to the rubber hoses 34 and 35 so as to absorb expansion and contraction of the damper oil. In this embodiment, the absorber 56 is the hydraulic pressure in this embodiment. It is attached to the case 37 of the hydraulic pressure adjustment mechanism 36 so as to be in communication with the fourth oil chamber 49 of the adjustment mechanism 36.

  The absorber 56 is formed so as to form an auxiliary oil chamber 58 communicating with the fourth oil chamber 49 and an air chamber 59 communicating with the atmosphere between the sub tank 57 connected to the case 37 and the sub tank 57. It comprises an absorber piston 60 slidably fitted to the sub tank 57, and a spring 61 provided between the absorber piston 60 and the sub tank 57 and housed in the air chamber 59. The air chamber 59 may be formed as a closed space without communicating with the atmosphere, and instead of the absorber piston 60, an auxiliary oil chamber 58 and an air chamber 59 are formed between the sub tank 57 and the auxiliary oil chamber 58. Alternatively, a bladder may be used in which the peripheral portion is held by the sub tank 57.

  Next, the operation of the first embodiment will be described. A pump case 23 having a cylinder hole 22 closed at both ends, and the first and second oil chambers 24 and 25 filled with damper oil together with the pump case 23 And a piston rod 27 coaxially connected to the piston 26 and penetrating one end of the pump case 23. While the pump unit 21 is provided between the front fork 12 and the vehicle body frame which constitute a part of the steering 13, it is on one side of a virtual plane VP extending in the longitudinal direction of the vehicle through the rotation center C of the steering 13. Since the pump unit 21 is arranged, the pump unit 21 is arranged around the steering 13 in order to simplify and miniaturize the pump unit 21. Space can be easily ensured.

  Further, since the first and second oil chambers 24 and 25 are connected via the rubber hoses 34 and 35 which are ducts having flexibility, the displacement of the pump case 23 at the time of steering steering causes the rubber hoses 34 and 35 to expand and contract. Since the absorber 56 which can follow at the same time and absorbs the expansion and contraction of the damper oil is connected to the rubber hoses 34, 35, it is possible to absorb the pressure change in the steering damper device 20 accompanying the temperature change. it can.

  Further, in the pump unit 21, an annular bush 28 is interposed between the outer periphery of the piston 26 and the inner periphery of the cylinder hole 22 so as to seal between the first oil chamber 24 and the second oil chamber 25. Therefore, by using an inexpensive bush 28 to seal between the first and second oil chambers 24 and 25 in which the same damper oil is contained, the space between the first and second oil chambers 24 and 25 is While the sealing is not perfect, the cost can be reduced.

  Further, since the hydraulic pressure adjustment mechanism 36 disposed separately from the pump unit 21 is interposed in the rubber hoses 34, 35, the pump unit 21 can be miniaturized. Moreover, since the hydraulic pressure adjustment mechanism 36 is mounted on the side of the vehicle body frame F, the hydraulic pressure adjustment mechanism 36 can be disposed near the pump unit 21 to shorten the rubber hoses 34, 35.

  Further, a first orifice 41 for throttling the flow of oil from the first oil chamber 24 to the second oil chamber 25 in the pump unit 21 and the first oil from the second oil chamber 25 are used as the hydraulic pressure adjustment mechanism 36. Since the second orifice 42 for throttling the flow of oil to the chamber 24 and the damping force adjustment valve 44 capable of changing the flow area of the bypass passage 43 bypassing the first and second orifices 41 and 42, the hydraulic pressure adjustment mechanism As the first and second orifices 41 and 42 and the damping force adjusting valve 44 are separately configured, the structure of the valves 41, 42 and 44 can be simplified.

  Moreover, since the hydraulic pressure adjustment mechanism 36 has the electric actuator 55 for changing the degree of adjustment, by changing the degree of adjustment of the hydraulic pressure adjustment mechanism 36 with the electric actuator 55, the damping force can be easily attenuated even during traveling of the motorcycle. Can be changed.

  The pump unit 21 is disposed between the upper surface of the top bridge 11a of the front fork 11 and one upper surface of a pair of left and right main frames 18 extending rearward from a head pipe 14 that steerably supports the steering 13. As a result, the pump unit 21 can be disposed by effectively utilizing the empty space above the one main frame 18.

  Although the second embodiment of the present invention will be described with reference to FIGS. 4 and 5, parts corresponding to those of the first embodiment are only illustrated with the same reference numerals, Description is omitted.

  A single pump unit 21 constituting a part of the steering damper device 20 has one left and right sides of an imaginary plane VP extending in the longitudinal direction of the vehicle through the center of rotation C of the steering 13, ie the axis of the head pipe 14 In the second embodiment, the bottom bridge 11b of the front fork 11 constituting a part of the steering 13 and the left main frame 18 of the main frames 18 of the vehicle body frame F are disposed on the left side). It is provided between.

  A bracket 62 is provided on the lower surface of the main frame 18 on the left side in the vehicle width direction of the pair of left and right main frames 18 that form a part of the vehicle body frame F and extend rearward from the head pipe 14. The mounting projection 23 a of the pump case 23 in the above is rotatably mounted on the bracket 62 through a pin 32. Further, the projecting end 27a of the piston rod 27 of the pump unit 21 from the pump case 23 is rotatably attached to the lower surface of the bottom bridge 11b via a pin 33. That is, the pump unit 21 is provided between the lower surface of the bottom bridge 11 b of the front fork 11 and the lower surface of the left main frame 18 of the vehicle body frame F.

  The case 37 of the hydraulic pressure adjustment mechanism 36 is attached to the vehicle body frame F side of the steering 13 and the vehicle body frame F. In the second embodiment, the front portion of the pair of main frames 18 is mounted. The case 37 is attached to a support plate 65 installed between the lower surfaces.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained. In particular, the empty space on the lower surface of the main frame 18 is effectively used to arrange the pump unit 21. it can. Further, the appearance can be improved while lowering the center of gravity, and in particular, the steering damper device 20 can be protected without providing a special cover by arranging the steering damper device 20 in a cowl (vehicle body cover). .

  As shown in FIG. 6, as a third embodiment of the present invention, one side of an imaginary plane VP extending in the longitudinal direction of the vehicle through the center of rotation C of the steering 13, ie, the axis of the head pipe 14 (this second In the embodiment, the single pump unit 21 is disposed on the left side, and the projecting end 27a of the piston rod 27 of the pump unit 21 from the pump case 23 is provided on the bracket 31 provided on the upper surface of the left main frame 18. The protruding end 23 a of the pump case 23 may be rotatably attached to the top surface of the top bridge 11 a of the front fork 11 through a pin 32.

  As a fourth embodiment of the present invention, as shown in FIG. 7, the case 37 of the hydraulic pressure adjustment mechanism 36 in the steering damper device 20 is attached to the top surface of the top bridge 11 a in the front fork 11. The projecting end 27a of the rod 27 from the pump case 23 is rotatably attached to the upper surface of the left main frame 18, and the projecting end 23a of the pump case 23 is rotatably attached to the upper surface of the top bridge 11a. You may

  In the fifth embodiment of the present invention, as shown in FIG. 8, the case 37 of the hydraulic pressure adjustment mechanism 36 in the steering damper device 20 is attached to the upper surface of the top bridge 11 a in the front fork 11. The projecting end 27a of the piston rod 27 from the pump case 23 is rotatably attached to the upper surface of the top bridge 11a, and the projecting end 23a of the pump case 23 is rotatably attached to the upper surface of the left main frame 18 You may do so.

  As a modification of the fourth and fifth embodiments, a pump unit 21 is provided between the lower surface of the bottom bridge 11b of the front fork 11 and the lower surface of the main frame 18 on the left and right sides, and the hydraulic pressure adjustment mechanism 36 may be attached to the lower surface of the bottom bridge 11b, and as in the second embodiment, the empty space of the lower surface of the main frame 18 is effectively used to arrange the pump unit 21. It is possible to improve the appearance while lowering the center of gravity and to protect the steering damper device 20 without providing a special cover by arranging the steering damper device 20 in the cowl. it can.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various design change is made, without deviating from this invention described in the claim. Is possible.

  For example, although the above-mentioned embodiment explained the steering damper device 20 of the two-wheeled motor vehicle, the present invention is widely applicable to a saddle-ride type vehicle including a three-wheeled motor vehicle.

11 ... Front fork 11a as a steering component ... Top bridge 11b ... Bottom bridge 13 ... Steering 20 ... Steering damper device 21 ... Pump unit 22 ... Cylinder hole 23 ... · Pump case 24 · · · First oil chamber 25 · · · Second oil chamber 26 · · · Piston 27 · · · Piston rod 28 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · rubber hose 36 which is a pipe line · · · Hydraulic pressure adjustment mechanism 41 ... first orifice 42 ... second orifice 43 ... detour 44 ... damping force adjustment valve 55 ... electric actuator 56 ... absorber 57 ... sub tank 58 ... Auxiliary oil chamber 59 Air chamber 60 Absorber piston C Center of rotation F Body frame VP Virtual plane WF front

Claims (10)

  A pump case (23) having a cylinder hole (22) closed at both ends, and first and second oil chambers (24, 25) filled with damper oil are formed between the pump case (23) A pump unit (21) comprising a piston (26) slidably fitted in a cylinder hole (22), a steering component (11) constituting a part of a steering (13), and a vehicle body frame (F) And a piston rod (27) coaxially connected to the piston (26) and liquid-tightly penetrating one end of the pump case (23). And one of the pump case (23) and the piston rod (27) is attached to the body frame (F). A virtual case extending in the longitudinal direction of the vehicle through the center of rotation (C) of the steering (13) while allowing the other of the pump case (23) and the piston rod (27) to be attached to the steering component (11) The first and second oil chambers (24, 25) disposed on the left and right sides of the plane (VP) are connected via flexible conduits (34, 35), and the expansion of the damper oil and A steering damper device for a saddle-ride type vehicle, characterized in that an absorber (56) for absorbing contraction is connected to the conduit (34, 35).   An annular bush (28) is interposed between the outer periphery of the piston (26) and the inner periphery of the cylinder hole (22) to seal between the first and second oil chambers (24, 25). The steering damper device for a saddle-ride type vehicle according to claim 1, characterized in that:   The steering component is a front fork (11) pivotally supporting a front wheel (WF) at a lower end, and the pump case (23) is attached to a bridge (11a, 11b) of the front fork (11); The steering damper device for a saddle-ride type vehicle according to claim 1 or 2, wherein a piston rod (27) is attached to the vehicle body frame (F).   The steering component is a front fork (11) pivotally supporting a front wheel (WF) at its lower end, and the piston rod (27) is attached to a bridge (11a, 11b) of the front fork (11); The steering damper device for a saddle-ride type vehicle according to claim 1 or 2, wherein a pump case (23) is attached to the vehicle body frame (F).   An oil pressure adjusting mechanism (36) disposed separately from the pump unit (21) is interposed in the pipe line (34, 35). Steering damper device for riding type vehicles.   The steering system for a saddle-ride type vehicle according to claim 5, wherein the hydraulic pressure adjustment mechanism (36) is attached to the side of the vehicle body frame (F) of the steering (13) and the vehicle body frame (F). Damper device.   The steering component is a front fork (11) pivotally supporting a front wheel (WF) at its lower end, and the hydraulic pressure adjustment mechanism (36) is attached to the bridge (11a, 11b) of the front fork (11) The steering damper device for a saddle-ride type vehicle according to claim 5, characterized in that:   A first orifice (41) for throttling the flow of the damper oil from the first oil chamber (24) to the second oil chamber (25); and the second oil chamber (25) Flow area of the damper oil from the first oil chamber (24) to the first oil chamber (24) and a bypass area (43) that bypasses the first and second orifices (41, 42). The steering damper device for a saddle-ride type vehicle according to any one of claims 5 to 7, further comprising: a damping force adjusting valve (44) which can be changed.   The steering damper device for a saddle-ride type vehicle according to any one of claims 5 to 8, wherein the hydraulic pressure adjustment mechanism (36) has an electric actuator (55) for changing the degree of adjustment. .   The absorber (56) is a sub-tank (57) attached to the pump case (23) or the hydraulic pressure adjustment mechanism (36), and an auxiliary oil chamber (76) communicating with the first and second oil chambers (24, 25). 58) and the periphery of the absorber piston (60) or the sub tank (57) slidably fitted to the sub tank (57) so as to form the air chamber (59) with the sub tank (57) The steering damper device for a saddle-ride type vehicle according to any one of claims 5 to 9, further comprising: a bladder in which the part is held.

Images