JP2761838B2 - Suspension system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique related to a suspension device, and can be particularly effectively used for a train.
However, the application is not limited to this. INDUSTRIAL APPLICABILITY The present invention is applicable not only to the design of a substructure capable of ascending and descending of a magnetically levitated vehicle, but also to a fixed substructure that does not elevate, or to other vehicles other than vehicles, such as aircraft. Can be. According to the conventional design philosophy, such a lower structure requires a link or a bar for receiving a braking torque in order to prevent the wheel from bending during braking. The present invention can be used in such a field.

[0002]

2. Description of the Prior Art FIG. 1 shows one of conventional suspension systems.
There, a wheel 1 indicated by a broken line is rotatable on an axle 2. A wheel lever 3 is connected to the axle, and the wheel lever 3 is also connected through a coil spring 4 to a vehicle chassis or bogie (not shown). When the vehicle is braked, the suspension receives the braking force, which produces a rotational torque. Its rotational torque is
Along one of the directions of the arrow 5 indicating the rotation direction. It acts on the wheel 1 as a lateral force and can cause a vertical movement of the wheel. Therefore, in order to prevent the lateral force, a torque rod 6 is provided between the chassis (or the bogie) and the brake flange 7.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique capable of reducing the necessity of such a torque rod 6 or eliminating the need for the torque rod.

[0004]

Means, operation, and effect for the suspension In the suspension device according to the present invention, a member (that is, a wheel) that bears a load in contact with a surface, an axle that rotatably supports the member, and an axle connected to the axle. A leaf spring. The leaf spring provides a spring action to the axle in the first plane.
Also, it is connected to the axle so as to be radially offset from the axle. Therefore, when acceleration or deceleration occurs in the vehicle, the movement of the axle is suppressed. Further, in this suspension device, one end of a leaf spring is rotatably connected to the vehicle. Thereby, the leaf spring is rotatable from the raised position of the wheel to the lowered position.

[0005] As described above, the leaf spring has both the function of suspending the vehicle body and the function of receiving torque. Therefore, the torque rod of the conventional device can be completely omitted. Also, since the spring at least partially functions as a torque rod, conventional torque rods will be smaller and lighter. The device according to the invention is at least lighter in weight than in the prior art, and has a reduced number of components when the torque rod is completely omitted.

When the invention is applied to an aircraft, the load bearing surface is the ground or runway, and the members in contact with the surface are wheels. When applied to a train or the like, the support surface is a rail, and the member in contact with the surface is a wheel. As a member in contact with the surface, there is a track of a tracked vehicle.

[0007] The leaf spring is preferably rotatably connected to the axle at a portion located substantially at the center of its length and between the lateral surfaces of the spring facing the direction of movement of the spring.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a suspension system 11 of the present invention.
It is a diagram showing, the suspension device 11 lowers the wheel 23,
It is in the position where the maximum static load is received. The device 11 includes a wheel lever member 12 having one end connected to a bogie (not shown) of a train by a pivot 13. This lever member 12
The axle 14 is supported at approximately its central position. Axle 1
4 protrudes with respect to the plane of the drawing. Lever member 12
Is bent in a crank shape from its center position, and tapers toward the shock absorber connecting portion 15 at the other end.

The shock absorber 16 has one end connected to the connecting portion 15 of the lever member 12, and the other end connected to one end 17 d of the leaf spring 17. The leaf spring 17 extends substantially parallel to the lever member 12, and the other end 17c is rotatably connected to the bogie. The actuator 18 has one end rotatably connected to the carriage by a lug 19, and the other end connected to an end 17 d of the leaf spring 17.

The leaf spring 17 has a hole running parallel to the axle 14, and the hole is at an equal distance from both ends of the leaf spring 17,
Two lateral surfaces 17a facing the direction of movement of the leaf spring 17,
It is located in the middle of 17b. A pivot pin 20 passes through the hole, and the pin 20 is connected to a brake flange 21 fixed to the lever member 12.

The brake flange 21 includes four brake actuating portions (brake pots) 22 which actuate a known type of brake caliper and simultaneously actuate a pair of brake pads and plates. With this, the wheel 23 is braked.

FIG. 3 shows the suspension before assembly is completed.
In this state, the leaf spring 17 is in a no-load state and is bent downward. By assembling the shock absorber 16 between the end 17d of the leaf spring and the end 15 of the lever member 12, a load is applied to the leaf spring 17, and the leaf spring 17 has a linear shape as shown in FIG. In the shock absorber 16,
Thus, there are both functions of absorbing the movement and of applying a preload to the leaf spring 17.

The actuator 18 is in the extended position in FIGS. 2 and 3, and the train wheels 23 are located below the bottom of the drop-in space 26 (ie, the lower surface of the raised wheels). However, by retracting the arm 25 of the actuator 18, the wheel 23 rotates the suspension in the direction of the arrow 24 around the pivot point (fulcrum of rotation) 13, 17 c, so that the raised position shown in FIG. can do.

FIG. 5 shows a state in which a maximum dynamic load is applied, that is, a state in which a running train is braked. At this time, a rotational torque is generated around the axle 14 by an arrow 2
It occurs in the direction indicated by 7. The rotation torque is applied to the leaf spring 17.
Is pressed in its length direction 28. Therefore, the leaf spring 17 supports the suspension device with respect to the bogie,
Functions as a torque bar (torque rod). Leaf spring 1
Since the preload is applied so that 7 is almost a straight line,
The leaf spring 17 suppresses its torque with only a negligible slight deflection.

Further, the actuator 18 is a leaf spring 17
At an acute angle with respect to, any load in the vertical direction is applied to the leaf spring 17 as an extension force. Due to the stretching force, the pivots 20, 17
The compression force between c is reduced, and the possibility that the spring is broken in the compressed state is also reduced.

When traveling and braking in the opposite direction,
The leaf spring 17 suppresses the extension force acting in the length direction.

FIGS. 6 and 7 show another embodiment of the present invention. In this embodiment, the provision of the second leaf spring 29 increases the spring force. The second leaf spring 29 extends in parallel with the first leaf spring 17.
The outer ends of the lugs 30 are rotatably connected between the paired lugs 30. At this time, each lug 30 is connected to the pivot point 17 of the first leaf spring 17.
It is rotatably connected to c and 17d. The second leaf spring 29 is separated from the first leaf spring 17 and is located below the first leaf spring 17. As shown in FIG. 7, these two leaf springs 17 and 29 have their central portions connected by a hinge connection 31. The hinge connection 31 comprises two interlocking lugs 32, 33
And the lugs 32, 33 are connected by through bolts 34 which pass through holes aligned therein. The hinge connection 31 and the outer rotatable lug 30 allow the two ends of the second leaf spring 29 associated with the first leaf spring 17 to move relatively longitudinally. The second leaf spring 29 does not receive a compressive load caused by the brake torque, and the torque is supported exclusively by the first leaf spring 17.

First leaf spring 17 and brake flange 21
And are connected by a vertical link 35. The vertical link 35 has a bifurcated upper end, and a leaf spring 1
7, 29 and coupling 31 and pivot pin 20
I support. This link 35 is connected to the brake flange 21 at portions 36 and 37 and supports the axle 14 at an intermediate point between them. The lower end of the link 35 extends downward and supports a guide wheel 38 at the lower end. The guide wheels 38 rotate around a vertical axis, and cooperate with a side wall on the track side on which the wheels 23 run when the wheels 23 descend to perform a guide function.

Further, in the embodiment shown in FIG. 6 and FIG.
It can be received on both 7 and 29. This is because the ends of the leaf springs 17 and 29 are connected by the rotating link (lug) 30. However, the shock absorber 16 and the actuator 18 are connected at one end to the center of the rotary link 30, and the bogie is connected at the other end to the center of the rotary link 30, and furthermore, the pivot pin 20 is connected to two plates. It should be arranged in the middle of the link connecting the central parts of the springs 17, 29.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a prior example.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a view showing a state in which the embodiment of FIG. 2 is being assembled;

FIG. 4 is a view showing the embodiment of FIG. 2, showing a state in which wheels are raised.

FIG. 5 is a diagram showing the embodiment of FIG. 2 and is a diagram for explaining a case where a brake is operated during traveling.

FIG. 6 is a front view showing another embodiment of the present invention.

FIG. 7 is an enlarged sectional view showing a part of the embodiment of FIG. 6;

[Explanation of symbols]

 Reference Signs List 11 suspension device 12 lever member 14 axle 16 shock absorber 17 leaf spring (first leaf spring) 18 actuator 20 pivot pin 21 brake flange 23 wheel (member supporting load) 29 second leaf spring 30 rotation link (lug) 35 Vertical link

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ian Robert Bennett UK, GEL 516, EF, Gloucester, Cheltenham, Ben Hall, Benhall Avenue 25 (72) Inventor Donald W. S. Young UK, GL19 N.P., Glosser, Sandhurst, Sandhurst Train, Dombia (No Address) (72) Inventor Takashi Okada 1099 Yakuguri, Kamiso-cho, Kakogawa City, Hyogo Prefecture No.8 38 Inside the Railway Technical Research Institute (72) Inventor Hideyuki Takizawa 2-8-3 Hikaricho, Kokubunji-shi, Tokyo Inside the Railway Technical Research Institute (56) Reference JP 54-144461 (JP) , A)

Claims (10)

(57) [Claims] 1. A member for supporting a load of a vehicle in contact with a surface.
A first traveling mode that moves in a raised position pulled upward,
The second member that moves at the lowered position where the member supporting the load is lowered
A suspension system for a vehicle having a traveling form of:
A suspension of a vehicle comprising: a. Axle for rotatably supporting a member for supporting the load. b. Connected to its axle to guide movement in the first plane
A lever member that rotates to rotate. c. One end is supported by the vehicle and the other end is supported by the actuator.
Is lifting, the intermediate portion is connected to said axle, said first
Bends in the vertical direction according to the load applied to the axle in the plane of the axle, and furthermore, is located at a position radially away from the axle, and is rotated and decelerated by a member supporting the load.
A leaf spring that is loaded along its length . d. By rotating about said one end of the leaf spring, an actuator for moving up and down the leaf spring and the axle to the lowered position and a raised position in the first plane. 2. The suspension according to claim 1 , wherein said lever member and said leaf spring extend substantially parallel to each other. 3. The suspension according to claim 2 , wherein the lever member and the leaf spring have respective ends rotatably connected to the vehicle and extend substantially in the same direction therefrom. Wherein said lever member has one end rotatably connected to the vehicle and extends towards the axle opposite to the normal forward direction of the vehicle from which claims 1-3
The suspension according to any one of the above. 5. The lever member has one end rotatably connected to the vehicle, and is connected to the axle at an intermediate portion in a longitudinal direction thereof, and the other end is connected to one end of the leaf spring. A suspension according to any one of claims 1 to 4, wherein the suspension is connected to the opposite end by a shock absorber. 6. The leaf spring and the shock absorber,
The suspension according to claim 5 , wherein the leaf spring is incorporated so as to be bent and loaded by a shock absorber. 7. The actuator according to claim 1, wherein the actuator is connected to the leaf spring at an end opposite to the one end.
7. The suspension according to any one of claims 6 to 7 . 8. A brake means for rotating the load supporting member rotating around the axle, comprising:
The leaf spring to be connected, including brake means for transmitting the torque generated by the brake acting on the leaf spring, suspension of claim 1-7. 9. The brake device according to claim 8 , wherein said brake means is connected to a connecting portion connecting said leaf spring and said axle.
The suspension device according to item 1. 10. A vehicle comprising a suspension device according to any one of claims 1-9.