JPS63173778A - Stopper structure of rotaty type hydraulic shock absorber in car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stopper structure for a rotary hydraulic shock absorber in a vehicle.

(Prior Art) As a type of hydraulic shock absorber used for rear wheel suspension of a motorcycle, there is, for example, a rotary hydraulic shock absorber disclosed in Japanese Patent Application Laid-Open No. 56-28008. Generally, this type of rotary hydraulic shock absorber has a shaft arranged concentrically within a cylindrical housing, and side cases rotatable with respect to the shaft are fixed to both ends of the cylindrical housing to seal the inside of the housing. A plurality of oil chambers are defined in the housing by radially protruding vanes on the inner periphery of the cylindrical housing and on the outer periphery of the shaft, and the plurality of oil chambers are communicated via a damping force generating means. Such a rotary hydraulic shock absorber is interposed between a swing arm that is swingably supported on the vehicle body and the vehicle body, and either the cylindrical housing side or the shaft side is fixed to the vehicle body, and the other is fixed to the vehicle body. constitutes a movable member.

(Problem to be solved by the invention) By the way, as for the stopper in the downward movement direction of the swing arm, only the weight of the swing arm and the spring force are applied, and not so large a force is applied, so the force is received between both vanes. However, since the weight of the vehicle is added to the stopper in the upward movement direction of the swing arm, it is necessary to extremely increase the strength of the vane in order to prevent it from receiving that major force. This results in an increase in the size of the vane, making it impossible to make the &1 thruster portion more compact.

Therefore, an object of the present invention is to place the stopper in the upward movement direction of the swing arm outside the shock absorber, so that the large force can be sufficiently absorbed and stopped, and the downward movement of the swing arm does not require much force. As for the stopper only, by placing it between both vanes,
To provide a stopper structure for a rotary hydraulic shock absorber in a vehicle, in which the interior of the shock absorber can be made compact by effectively utilizing space without increasing the size of the vane.

(Means for Solving the Problems) In order to achieve the above objects, the present invention provides a swing arm (8
) downward movement direction stopper (65), (les) rotary hydraulic shock absorber (to), (110) internal cylindrical housing (xi), (111) side vane (25)
, (125) and the shaft (13), (113) side vanes (27), (127), and stoppers (67) in the upward movement direction of the swing arm (8).
167) on the i part (10), (110) outside and on the cylindrical housing (11), (111) side or on the shaft (1
3), one of the movable members (113) on the (113) side
), (113) and the vehicle body (1) or the vehicle body side fixing member (121).

(Function) First, the swing arm (8) upward movement direction stopper (67)
, (167) are placed outside the mi device (10), (110), so the large force is transferred to the movable member (II).
, (113) and the vehicle body (1) or the vehicle body side fixing member (1)
21), the Uke is sufficiently stopped. Regarding the stoppers (65) and (165) in the downward movement direction of the swing arm (8) to which a large force is not applied, the M part (1
0), (110) Internal housing side vane (25)
, (125) and shaft side vane (27), (127)
Vane (25),
Space can be used effectively without increasing the size of (27), (125), and (127), and the interior of the IIL bomber components (1) and (110) can be configured compactly.

(Example) Examples will be described below based on the accompanying drawings.

Figures 1 and 2 show the side surfaces and fracture planes of the main parts of a motorcycle, where (1) is the body frame, (3) is the transmission case integrated with the engine, (+3) is the swing arm, and (
9) is the rear wheel, and (1G) is a rotary hydraulic shock absorber.

The rotary hydraulic shock absorber (10) is as shown in FIGS. 3 and 4, and includes a circular cylindrical housing (11), a shaft (13),
Side case (17), (21) Vane (25)
, (27), damping force generating means (31), etc., and the damping force generating means (31) includes a piston (32), an orifice member (33), and a piston valve (34). Three vanes (
25)... are bolted at approximately equal intervals in the circumferential direction and protrude in the radial direction, and three vanes (27) are integrally connected to the outer periphery of the large diameter portion (14) of the shaft (13). are protruding from both vanes (25).

(27) both have the same rectangular shape when viewed from the front. Axis (1
3) is inserted concentrically into the cylindrical housing (11), and the vane (25) of the cylindrical housing (11) is in sliding contact with the outer peripheral surface of the sleeve length diameter portion (14), and the shaft (13) The vane (27) also slides on the inner peripheral surface of the cylindrical housing (11), and sealing materials (26), ( 28) are fitted respectively.

One side case (17) is rotatably assembled to one end of the shaft (13) via a bearing (41), and this side case (17) has a flat inner surface and is connected to the cylindrical housing (11). and both vanes (25), (2)
) is tightly fixed to the end face of the cylindrical housing (11) with bolts. A sleeve (42) is interposed between the outer periphery of the end of the sleeve length diameter portion (14) and the side case (17), and a seal is installed between the shaft (13) on both sides of the bearing (41) and the side case (17). Ring (43), (
44) is interposed.

A small-diameter extended shaft portion (15) is formed on the other end of the shaft (13), and a large diameter portion (14) of this extended shaft portion (15) is connected to the other side via a bearing (45). Case (21)
is rotatably assembled, and the inner surface of this side case (21) is formed with a circular protrusion (22) that is press-fitted into the inner surface of the other end of the cylindrical housing (11). This protrusion (
Both vanes (25) with the end surfaces of 22) flattened,
The side case (21) is fixed to the end face of the cylindrical housing (11) with bolts in close contact with the other end face of (27).

Same as above, sleeve length diameter part (14) and side case (21)
A sleeve (46) is interposed in between, and an extension shaft (1
A collar (47) is fitted in the middle part of 5), a seal ring (48) is interposed between this collar (47) and the side case (21), and a seal ring (48) is fitted on the side opposite to the bearing (45). A seal ring (49) is also interposed between the shaft (13) and the side case (21).

In this way, the oil on the compression side is contained in the space surrounded and sealed by the cylindrical housing (11), the shaft (13), and both side cases (17) and (21) by both vanes (25) and (27). Three chambers (51) and three expansion side and oil chambers (52) are defined alternately in the circumferential direction.

Furthermore, oil holes (18) that open to the oil chamber (51) on the compression side are formed on the inner surface of one side case (17), and each oil hole (1B)... is formed inside the side case (17). They are communicated through a circumferential oil passage (19) formed in. In addition, oil holes (23) that open to the oil chamber (52) on the expansion side are formed on the end face of the protrusion (22) of the other side case (21), and each oil hole (23)... is also formed on the side. Case(
21) through a similar oil passageway (24) formed within. Note that the opposite sides of both sleeve holes (18) and (23) are respectively closed with plugs (53) and (54).

A valve case (35) is provided at one location on the outer peripheral surface of the cylindrical housing (11).
A circular valve chamber (36) for accommodating the damping force generating means (3 parts) is formed to pass through the valve chamber (36) in the horizontal direction, and a piston (32) is slidably fitted into the valve chamber (36). An orifice member (33) is provided concentrically with the piston (32), and a piston valve (34) is provided on the piston (32).
) will be provided. Such a valve case (35) has an extension part (1) formed on both side cases (17) and (21).
7a) and (21a) with bolts, and the sleeve passages (19) and (24) open at both ends of the valve chamber (36), respectively.

In this way, the rotary hydraulic shock absorber (10) is assembled, the inside is filled with hydraulic oil, and the rotary hydraulic shock absorber (10) is assembled.
), the cylindrical housing (11) is connected to the swing arm (8).
), and a shaft (13) is fixed to the vehicle body frame (1). In addition, swing arm (8)
A rear wheel (9) is supported on the rear end of the vehicle.

One holder (55) is rotatably attached to one end of the shaft (13) on the large diameter portion (14) side, and the tip of the extended shaft (15) on the other end of the shaft (13) is the other holder (
57) are assembled together with splines (58) and fastened with nuts, and both holders (55) and (57) are bolted to the lower inner surfaces of the left and right vehicle body frames (1), (1). As a result, the shaft (13) of the rotary hydraulic Mi thruster lO) is fixed, the cylindrical housing (11) integrated with the swing arm (8) becomes the rotating side, and the swing arm (8) has the shaft (13) fixed. It can freely swing up and down around the center.

When the swing arm (8) swings upward as shown in the imaginary line in FIG. 1 due to the bouncing behavior of the rear wheel (9), hydraulic oil flows from the oil chamber (51) on the compression side through the oil passage (19).
It is throttled through the orifice member (33) and piston valve (34) in the valve chamber (36), thereby generating a damping force, and passes through the oil passage (24) to the expansion side oil chamber (
Hydraulic oil flows into 52). Furthermore, swing arm (8)
A torsion bar (61) and a link mechanism (62) are installed between the body frame (1) and the torsion bar (at), and the spring force of the torsion bar (at) causes the swing arm (8) to return to the position shown in the solid line. There is. In addition, the preload adjuster arm (6) provided on the torsion bar (61)
3) is fixed to a bracket (64) fixed to the vehicle body frame (1) with bolts (68) and nuts (69).

In addition, a mission case (3) is placed in close proximity in front of the rotary hydraulic shock absorber (10), and the drive sprocket (5) to which rotational power is output via the mission gear mechanism (4) is connected to the shaft (13). The bearing case (7), which is disposed in front of the spline (58) portion of the holder (57) assembled to the extension shaft (15) and bearing the sprocket shaft (6) in the lateral direction, is attached to the extension shaft (15). ) upper color (47)
Fixed to the outer periphery.

In the above, the stopper in the downward movement direction of the swing arm (8) is connected to the housing side vane (2) inside the impactor (10).
5) and the shaft side vane (27), and a stopper in the upward movement direction of the swing arm (8) is arranged between the shock absorber (10) and the shaft side vane (27).
Place it outside.

First, as shown in FIGS. 5 and 6, there are mounting bosses (2Sa) at both ends of the front and rear surfaces of the housing side vane (25).
・Protrudes from both mounting bosses (25) on the side that approaches the shaft vane (27) when the swing arm (8) moves downward.
a) A horizontal rib (25b) is integrally formed between the ribs (25b) and fitting holes (25b) on the left and right sides of the rib (25b).
5c).

(25c) is drilled. A stopper (65) made of a flexible elastic member, such as rubber, is applied to the lower surface of the rib (25b), and the fitting holes (25c), (25c
), the fitting protrusion (85a) on the stopper (65), (
85a) is fitted into the grommet. This stopper (65)
has a wall thickness that is large enough to protrude from the rib (25b), and when the swing arm (8) moves downward, this stopper (65)
There is a contact part (2) on the opposite surface of the shaft side vane (27) where the
7a) is formed so as to protrude slightly.

On the other hand, as shown in FIG. 1, FIG. 3, and FIG.
A recess (12a) is formed on the entire surface of the recess (12a).
2a) Rubber stopper (67) with flexibility also inside
bury it. This stopper (67) protrudes from the front of the protrusion (12), and when the swing arm (8) moves upward, this stopper (67) touches the left and right vehicle body frames (1), (
1) It comes into contact with a cross member (2) installed between them.

In this way, the swing arm (8) has a stop flange (
85) 'it' Inside the m-blocker (lO) (D H->
Since it is placed between (25) and (27), part a (1
0) Effective use of internal space can be achieved. Moreover, in the downward movement direction of the swing arm (8), only a sprung load consisting of its own weight and the spring force of the torsion bar (61) is applied, and since a very large force is not applied, the vane (25)
, (27) Even if the force is stopped between the vanes (25
), there is no need to increase the strength of (27) to an extreme degree (the same strength as the conventional one is sufficient and there is no need to increase the size).

And a stopper (67) in the upward movement direction of the swing arm (8).
) is connected to the cross member (
2), the weight of the vehicle, that is, the large sprung load applied when the swing arm (8) moves upward, can be reliably received and stopped between the cross member (2) and the housing (11).

Therefore, the interior of the rotary hydraulic shock absorber (10) can be made more compact.

Next, a second embodiment shown in FIG. 8 and subsequent figures will be described.

In Fig. 8, as before, (1) is the vehicle body frame, (3) is the transmission case, (8) is the swing arm, (9) is the rear wheel, (61) is the torsion bar, (6) is the
2) is the link mechanism, swing arm (8)
is directly pivoted to the vehicle body frame (1) by a support shaft (8a). In this embodiment, the swing arm (8)
A rotary hydraulic shock absorber (110) is installed above the support shaft (8a) of the
Set up.

As shown in FIGS. 9 and 10, this rotary hydraulic shock absorber (110) is also substantially the same as the above, and the cylindrical housing (111
), shaft (113), side case (117), (
121), vanes (125), (127), damping force generating means (131), etc. Two vanes (125), (12) are arranged on the inner periphery of the cylindrical housing (111).
5) are diametrically opposed and bolted together, and the shafts (II3
) Similarly, two vanes (127) and (12
7) are combined together. This allows the compression side oil chamber (1
15) and an oil chamber (152) on the expansion side are alternately defined, and (11B) and (123) are oil holes, and (119) are oil holes.
), (124) is an oil passage, (135) is a valve case, and (136) is a valve chamber.

Such a rotary hydraulic shock absorber (110) consists of left and right vehicle body frames (1), and a cross member (2) installed between (1).
), both side cases (117) and (121) are bolted and fixed to the housing (111) and side case (117) via brackets (71) and (71).

(121) becomes a fixed member on the vehicle body side, and the shaft (113) becomes a movable member. Then, one end of the shaft (113) protrudes from the side case (121), and an arm (72) is attached to the protruding end.
are connected with serrations (73), and then bolts (76)
), and the link (77) is connected between the left and right bifurcated parts (74) extending rearward of this arm (72) with a pivot shaft (78), and the lower end of the link (77) is connected to the swing arm (8).
) is connected to the front part by a pivot shaft (79). Therefore, the axis (1
13) is the link (77) when the swing arm (8) swings.
) and arm (72) in the same direction.

In the above, the housing side vane (125) and the shaft side vane (12) inside the 11 shocker (110) are similar to the above.
A stopper in the downward movement direction of the swing arm (8) is disposed between the swing arm (8) and the swing arm (8). That is, as shown in Fig. 9, the swing arm (
8) When the shaft side vane (127) is moving downward, the lip (125) protrudes from the surface of the housing side vane (125) on the approaching side.
b) Rubber stopper (165) with flexibility on the bottom surface
is fitted with a grommet, and a slightly protruding contact portion (127a) is formed on the surface of the shaft side vane (127) facing the stopper (165).

As shown in FIG. 11, a flexible rubber stopper (16) is also provided on the upper surface (75) that connects the bifurcated portion (74) of the arm (72) connected to the shaft (113).
7), and a stopper receiver (122) having a recess (122a) into which this stopper (167) fits and abuts together with the arm (72) when the swing arm (8) moves upward is attached to the side case ( 121) and is integrally provided on the front part thereof.

Such a stopper structure also functions in the same manner as described above.

By the way, in the embodiment, the rear wheel suspension of a motorcycle was explained, but the invention is not limited to this. The F device is commonly used in, for example, trailing arm type suspensions of general vehicles, and a stopper may be provided on the shaft side vane.

(Effects of the Invention) As described above, according to the present invention, a stopper in the downward movement direction of the swing arm is disposed inside the rotary hydraulic shock absorber between the housing side vane and the shaft side vane, and A stopper in the upward movement direction of the swing arm is provided between the movable member on either the housing side or the shaft side outside the device and the vehicle body or the fixed member on the vehicle body side, which saves space without increasing the size of the vane. It is possible to make the inside of the shock absorber more compact by effectively utilizing it, and moreover, the large force in the upward movement direction of the swing arm can be reliably received and stopped outside the shock absorber.

[Brief explanation of the drawing]

1 and 2 are a side view and a cutaway plan view of the main parts of a motorcycle showing the first embodiment, and FIGS. 3 and 4 are a cutaway side view and a cutaway plan view of the rotary hydraulic N town device. ■ Line sectional view, Figures 5 and 6 are a plan view and a cutaway side view of the vane equipped with a stopper, Figure 7 is a schematic plan view of the buffer section, and Figure 8 is the second vane.
FIGS. 9 and 10 are a side view of the main parts showing the embodiment, a cutaway side view and a plan view of the shock absorber portion, and FIG. 11 is a side view of the arm. In the drawings, (1) is the vehicle body, (2) is the cross member, (
8) is a swing arm, (10), (110) are rotary hydraulic shock absorbers, (11), (111) are cylindrical housings, (12) are stopper protrusions, (H), (113)
) is the axis, (17), (21), (117) (121)
are side cases, (25), (27), (12
5), (127) are vanes, (122) are stopper receivers, (31), (131) are damping force generating means, (
51) , (52) , (151) , (152
) is the oil chamber, (65), (67), (165)
, (167) is a stopper, (71) is a bracket, (
72) is an arm, and (77) is a link. Patent applicant: Honda Motor Co., Ltd. Agent
Person Patent Attorney 2 1) Part 1 Patent Attorney Kuni Ohashi Patent Attorney Yuki Koyama Patent Attorney 1)
Shigeru Figure 4 Figure 3 77+

Claims (1)

[Claims] A shaft is disposed concentrically within a cylindrical housing, and side cases rotatable with respect to the shaft are fixed to both ends of the cylindrical housing to seal the inside of the cylindrical housing. A rotary hydraulic type in which a plurality of oil chambers are defined in the housing by protruding radial vanes on the inner periphery of the housing and the outer periphery of the shaft, and the plurality of oil chambers are communicated via a damping force generating means. The rotary hydraulic shock absorber is interposed between the vehicle body and a swing arm that is provided with a shock absorber and is swingably supported by the vehicle body, and either the cylindrical housing side or the shaft side is connected to the vehicle body. In the vehicle, a stopper for moving the swing arm in a downward direction is disposed between the cylindrical housing side vane and the shaft side vane, and a stopper for moving the swing arm in the upward movement direction is provided. A stopper structure for a rotary hydraulic shock absorber in a vehicle, characterized in that a stopper is disposed outside the rotary hydraulic shock absorber and between the movable member and a vehicle body or a fixed member on the vehicle body side.