JP2022091046A - Suspension device - Google Patents

Abstract

To provide a suspension device capable of adjusting a shape for an installation object.SOLUTION: A suspension device according to the present invention comprises: a leaf spring that is extended like a belt; a first arm for supporting one end of the leaf spring; a second arm for supporting the other end of the leaf spring; a connection member for rotatably connecting the first and second arms together; a first adjustment part capable of adjusting a positional relationship of the first arm relative to the connection member; and a second adjustment part capable of adjusting a positional relationship of the second arm relative to the connection member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a suspension device.

Conventionally, there is known a suspension device provided on a vehicle or the like, which has a cushioning function to prevent vibration due to unevenness of the road surface from being transmitted to the vehicle body via wheels, and improves the riding comfort and steering stability of the vehicle. .. Among the suspension devices, the leaf spring type suspension device is configured by using a leaf spring (see, for example, Patent Document 1).

Leaf springs are attached to an arm that supports the wheels and a member that supports the vehicle body. Specifically, the leaf spring is attached to a right arm that supports the right wheel, a left arm that supports the left wheel, and a member that supports the vehicle body.

Japanese Unexamined Patent Publication No. 11-263109

By the way, the size and shape of the suspension device change depending on the size and shape of the vehicle. Therefore, there has been a demand for a suspension device that can adjust the shape according to the difference in the size and shape of the vehicle.

The present invention has been made in view of the above, and an object of the present invention is to provide a suspension device capable of adjusting the shape of an installation target.

In order to solve the above-mentioned problems and achieve the object, the suspension device according to the present invention includes a leaf spring extending in a band shape, a first arm for supporting one end of the leaf spring, and the other end of the leaf spring. A second arm that supports the first arm, a connecting member that rotatably connects the first and second arms, a first adjusting unit that can adjust the relative positional relationship of the first arm with respect to the connecting member, and the above. It is characterized by including a second adjusting portion capable of adjusting the relative positional relationship of the second arm with respect to the connecting member.

Further, in the suspension device according to the present invention, in the above invention, the first adjusting portion adjusts the inclination of the first arm with respect to the connecting member, and the second adjusting portion adjusts the inclination of the first arm with respect to the connecting member. It is characterized by adjusting the inclination of the arm.

Further, in the suspension device according to the present invention, in the above invention, the support position of the leaf spring by the first and second adjusting portions is the first connecting position between the first arm and the connecting member, and It is characterized in that it is located between the second connecting positions of the second arm and the connecting member.

Further, in the suspension device according to the present invention, in the above invention, the first adjusting portion has a positional relationship between the first main body portion connected to the connecting member, the first main body portion and the first arm. It has a first adjusting member to be adjusted, and the second adjusting portion adjusts the positional relationship between the second main body portion connected to the connecting member, the second main body portion, and the second arm. It is characterized by having a second adjusting member.

Further, the suspension device according to the present invention is characterized in that, in the above invention, through holes through which the leaf springs are inserted are formed in the first and second main body portions, respectively.

Further, in the suspension device according to the present invention, in the above invention, the first and / or the second adjusting portion is for the first main body portion, the second main body portion, and the first and second main body portions. It has a connection portion to be detachably connected, and the first and second main body portions and the connection portion form a through hole through which the leaf spring is inserted.

Further, the suspension device according to the present invention is characterized in that, in the above invention, the leaf spring is made of a fiber reinforced plastic.

According to the present invention, there is an effect that the shape can be adjusted with respect to the installation target.

FIG. 1 is a perspective view schematically showing a configuration of a suspension device according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the configuration of the suspension device according to the embodiment of the present invention. FIG. 3 is a plan view schematically showing the configuration of a main part of the suspension device according to the embodiment of the present invention. FIG. 4 is an exploded perspective view schematically showing the configuration of a main part of the suspension device according to the embodiment of the present invention. FIG. 5 is a perspective view (No. 1) showing an example in which the shape of the suspension device shown in FIG. 1 is adjusted. FIG. 6 is a plan view showing the configuration of the suspension device shown in FIG. FIG. 7 is a plan view showing the configuration of a main part of the suspension device shown in FIG. FIG. 8 is a perspective view (No. 2) showing an example in which the shape of the suspension device shown in FIG. 1 is adjusted. FIG. 9 is a plan view showing the configuration of the suspension device shown in FIG. FIG. 10 is a plan view showing the configuration of a main part of the suspension device shown in FIG. FIG. 11 is an exploded perspective view schematically showing the configuration of a main part of the suspension device according to the modified example of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail together with drawings. The present invention is not limited to the following embodiments. In addition, each figure referred to in the following description merely schematically shows the shape, size, and positional relationship to the extent that the content of the present invention can be understood. That is, the present invention is not limited to the shapes, sizes, and positional relationships exemplified in each figure.

(Embodiment)
FIG. 1 is a perspective view schematically showing a configuration of a suspension device according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the configuration of the suspension device according to the embodiment of the present invention. The suspension device 1 is provided in the vehicle, for example, and is interposed between the right wheel 101, the left wheel 102, and the vehicle body (body) to suppress the vibration transmitted from the wheels from being transmitted to the vehicle body.

The suspension device 1 includes a right arm 11 that supports the right wheel 101 via the knuckle 103, a left arm 12 that supports the left wheel 102 via the knuckle 104, a member 13 that supports the vehicle body, and the wheel 101. A leaf spring 14 that elastically deforms in response to vibration from 102, a first adjusting portion 15, and a second adjusting portion 16 are provided. The suspension device 1 is attached to the vehicle body via the member 13 and absorbs vibration transmitted from the wheels according to the unevenness of the road surface. The wheels are supported by the arm via knuckles, disc rotors, and the like. In FIG. 1, the X direction is the left-right direction of the vehicle when it is attached to the vehicle body, corresponds to the longitudinal direction of the suspension device 1, the Y direction corresponds to the front-rear direction of the vehicle, and the Z direction is the up-down direction of the vehicle. Corresponds to the direction.

The right arm 11 has a main body portion 11a and a first link 11b that is supported by the main body portion 11a and grips one end of the leaf spring 14.

The first link 11b has a first grip portion 111 that grips one end of the leaf spring 14, and a first connecting portion 112 that connects the main body portion 11a and the first grip portion 111. The first grip portion 111 is rotatably supported by the first connecting portion 112 around a shaft 112a extending parallel to the Y direction. The shaft 112a penetrates the first grip portion 111 and is supported by one end of the first connecting portion 112. The first connecting portion 112 is rotatably supported by the main body portion 11a around a shaft 112b parallel to the Y direction. The shaft 112b penetrates the first connecting portion 112 and is supported by the main body portion 11a. The shafts 112a and 112b are configured by, for example, a pin or a ball joint.

The left arm 12 has a main body portion 12a and a second link 12b supported by the main body portion 12a and gripping the other end of the leaf spring 14.

The second link 12b has a second grip portion 121 that grips the other end of the leaf spring 14, and a second connecting portion 122 that connects the main body portion 12a and the second grip portion 121. The second grip portion 121 is rotatably supported by the second connecting portion 122 around a shaft 122a extending parallel to the Y direction. The shaft 122a penetrates the second grip portion 121 and is supported by one end of the second connecting portion 122. The second connecting portion 122 is rotatably supported by the main body portion 12a around an axis 122b parallel to the Y direction. The shaft 122b penetrates the second connecting portion 122 and is supported by the main body portion 12a. The shafts 122a and 122b are composed of, for example, pins and ball joints.

Here, the first link 11b and the second link 12b each grip the end portion of the leaf spring 14. In the present specification, it is referred to as surface support that the member is pressed against the surface of the member to restrain and hold the movement of the member in at least the vertical direction (here, the Z direction). In this surface support, the member may be surrounded and the movement in the horizontal direction (here, the Y direction) and the rotation movement may be further restrained and held. The first grip portion 111 and the second grip portion 121 each hold the end portions of the leaf spring 14 by surface support.
In contrast to surface support, support by points or lines with protrusions or the like is called point support. In the point support, a protrusion is provided on the grip portion, and the leaf spring 14 is supported with an area that allows the leaf spring 14 to rotate with the protrusion as a fulcrum. The first grip portion 111 and the second grip portion 121 may grip the leaf spring 14 by point support.

The member 13 supports the vehicle body and intervenes between the vehicle body and the wheels 101, 102, the right arm 11 and the left arm 12. The member 13 has an arm support portion 13a that supports the right arm 11, an arm support portion 13b that supports the left arm 12, and a main body that extends in the X direction (left-right direction of the vehicle body) and connects to the right arm 11 and the left arm 12. It has a portion 13c. The arm support portions 13a and 13b extend in a direction perpendicular to the direction in which the main body portion 13c extends (X direction).

The arm support portion 13a has shaft portions 131 and 132 extending in the Y direction and in opposite directions to each other. The shaft portions 131 and 132 rotatably support the right arm 11 around the rotation shafts Y ₁₁ and Y ₁₂ extending in the Y direction. The rotation axes Y ₁₁ and Y ₁₂ coincide with each other on an extension line in the stretching direction.
Further, the arm support portion 13b has shaft portions 133 and 134 extending in the Y direction and in opposite directions to each other. The shaft portions 133 and 134 rotatably support the left arm 12 around the rotation shafts Y ₂₁ and Y ₂₂ extending in the Y direction. The rotation axes Y ₂₁ and Y ₂₂ coincide with each other on an extension line in the stretching direction.
Here, the member 13 corresponds to a connecting member that rotatably connects the right arm 11 and the left arm 12. The member 13 may be integrated with the vehicle body. When the member 13 is integrated with the vehicle body, the vehicle body functions as a connecting member for connecting the right arm 11 and the left arm 12.

The leaf spring 14 forms a band and extends in the X direction. The leaf spring 14 is formed by using, for example, Fiber Reinforced Plastics (FRP), a metal, or a resin. The leaf spring may be made of one plate material or may be made by laminating a plurality of plate materials. In designing the shape, elastic force, etc. of the leaf spring 14, FRP has a higher degree of freedom in its design than metal or resin.

Subsequently, the first adjusting unit 15 and the second adjusting unit 16 will be described with reference to FIGS. 3 and 4. FIG. 3 is a plan view schematically showing the configuration of a main part of the suspension device according to the embodiment of the present invention. FIG. 4 is an exploded perspective view schematically showing the configuration of a main part of the suspension device according to the embodiment of the present invention. Although FIGS. 3 and 4 show the configuration of the first adjustment unit 15, the second adjustment unit 16 also has the same configuration as the first adjustment unit 15.

The first adjusting portion 15 has a U-shaped main body portion 151 and a pin 152 for fixing the relative positional relationship between the main body portion 151 and the right arm 11 (main body portion 11a). Two pins 152 are provided so as to sandwich the main body portion 151 and face each other in the Y direction.
At one end of the main body 151, a plurality of through holes 153 through which one pin 152 is inserted are formed. Further, at the other end of the main body portion 151, a plurality of through holes 154 through which the other pin 152 is inserted are formed. The through hole 153 is provided around the rotation shaft Y ₁₁ , and the through hole 154 is provided around the rotation shaft Y ₁₂ .
Further, in the main body portion 151, a through hole 155a through which the shaft portion 131 is inserted and a through hole 155b through which the shaft portion 132 is inserted are formed, and a through hole 156 through which the leaf spring 14 is inserted is formed. To.

Further, a through hole 113 through which the pin 152 is inserted is formed in the main body portion 11a. A plurality of through holes 113 are formed corresponding to the formation positions of the through holes 153 and 154. Further, the main body portion 11a is formed with a through hole 114a through which the shaft portion 131 is inserted and a through hole 114b through which the shaft portion 132 is inserted.

The second adjusting portion 16 has a U-shaped main body portion 161 and a pin 162 for fixing the relative positional relationship between the main body portion 161 and the left arm 12 (main body portion 12a). Two pins 162 are provided so as to sandwich the main body portion 161 and face each other in the Y direction.
A plurality of through holes through which one pin 162 is inserted are formed at one end of the main body portion 161. Further, a plurality of through holes through which the other pin 162 is inserted are formed at the other end of the main body portion 161. These through holes are provided around the rotation shaft Y ₂₁ and the rotation shaft Y ₂₂ , respectively. Further, the main body portion 161 is formed with a through hole through which the shaft portion 133 is inserted, a through hole through which the shaft portion 134 is inserted, and a through hole through which the leaf spring 14 is inserted. These through holes have the same role as the above-mentioned through holes 155a, 155b, and 156.
The support position of the leaf spring 14 by the first adjusting portion 15 and the second adjusting portion 16 is, for example, the through hole 156 in the first adjusting portion 15, and the connecting position (first connecting position) between the right arm 11 and the member 13. And, it is located between the connection position (second connection position) between the left arm 12 and the member 13.

Further, a through hole through which the pin 162 is inserted is formed in the main body portion 12a. The through holes have the same role as the through holes 153, and a plurality of through holes are formed corresponding to the formation positions of the through holes of the second adjusting portion 16.
Further, the main body portion 12a is formed with a through hole through which the shaft portion 133 is inserted and a through hole through which the shaft portion 134 is inserted. These through holes have the same role as the through holes 114a and 114b.

In the suspension device 1, for example, by inserting the pin 152 through the through hole 113 of the main body portion 11a and the through hole 153 of the first adjusting portion 15, the relative positional relationship between the right arm 11 and the first adjusting portion 15 is fixed. Will be done. At this time, the inclination of the right arm 11 with respect to the member 13 is adjusted by the insertion position of the pin 152 in the first adjusting unit 15. The "tilt" adjusted here corresponds to the angle formed by the longitudinal direction of the member 13 (here, the X direction) and the longitudinal direction of the right arm 11. In this way, the relative positional relationship between the right arm 11 and the first adjusting unit 15 can be adjusted by the insertion position of the pin 152. Similarly, the relative positional relationship between the left arm 12 and the second adjusting unit 16 can also be adjusted by the insertion position of the pin 162.

FIG. 5 is a perspective view (No. 1) showing an example in which the shape of the suspension device shown in FIG. 1 is adjusted. FIG. 6 is a plan view showing the configuration of the suspension device shown in FIG. FIG. 7 is a plan view showing the configuration of a main part of the suspension device shown in FIG.

In the suspension device 1 shown in FIGS. 5 to 7, the through holes (for example, through holes 113 and 153) through which the pins 152 and 162 are inserted are changed to through holes at positions different from those of the suspension devices 1 shown in FIGS. 1 and 2. is doing. Therefore, the distance between the axis Q passing through the center of the wheel 101 and extending in parallel with the X direction and the main body 13c of the member 13 is the distance d ₁ of the suspension device 1 shown in FIG. 2 and FIG. It differs from the distance d ₂ of the suspension device 1 shown in (d ₂ <d ₁ ).

FIG. 8 is a perspective view (No. 2) showing an example in which the shape of the suspension device shown in FIG. 1 is adjusted. FIG. 9 is a plan view showing the configuration of the suspension device shown in FIG. FIG. 10 is a plan view showing the configuration of a main part of the suspension device shown in FIG.

The suspension device 1 shown in FIGS. 8 to 10 has a through hole (for example, through holes 113, 153) through which the pins 152 and 162 are inserted, which is different from the suspension device 1 shown in FIGS. 1, 2, 5, and 6. It has been changed to a through hole at the position. Therefore, the distance between the axis Q passing through the center of the wheel 101 and extending in parallel with the X direction and the main body 13c of the member 13 is the distance d ₁ of the suspension device 1 shown in FIG. 2 and FIG. The distance d ₂ of the suspension device 1 shown in 6 and the distance d ₃ of the suspension device 1 shown in FIG. 9 are different (d ₂ <d ₁ <d ₃ ).

In the embodiment described above, in the suspension device 1, the distance between the center of the wheel and the member 13 can be changed by changing the insertion position of the pins 152 and 162 into the through holes. The distance between the center of the wheel and the member 13 corresponds to the distance in the height direction of the vehicle. Therefore, it can be said that the suspension device 1 can be adjusted according to the difference in vehicle height depending on the type of vehicle. According to the suspension device 1 according to the present embodiment, it is possible to adjust the shape of the installation target and respond to it.

Further, in the suspension device 1, even if the leaf spring 14 is deformed due to the displacement of the arm, the member 13 is not affected by the deformation and does not deform. That is, in the suspension device 1, when the vibration is transmitted from the arm to the leaf spring 14, the leaf spring 14 absorbs the vibration and the vibration is not transmitted to the member 13. At this time, the right arm 11 and the left arm 12 are rotatably supported by the member 13, and the load due to the fluctuation is converted into a rotational force, so that the vibration of the arm is suppressed from being transmitted to the member 13. ..

Further, according to the embodiment, for example, the leaf spring 14 is inserted into the through hole 156 formed in the main body portion 151 of the first adjusting portion 15 and surrounded by the inner wall of the through hole 156, so that the leaf spring is surrounded by the through hole 156. At the time of deformation of 14, interference with other members is suppressed.

(Modification example)
Next, a modified example of the embodiment will be described with reference to FIG. FIG. 11 is an exploded perspective view schematically showing the configuration of a main part of the suspension device according to the modified example of the present invention. The suspension device according to the modified example includes a first adjustment unit 15A instead of the first adjustment unit 15 of the suspension device 1 described above. Since other configurations are the same as those of the suspension device 1, the description thereof will be omitted. The configuration of the second adjusting unit 16 may be the same as that of the embodiment, or may be the same as that of the first adjusting unit 15A.

The first adjusting unit 15A forms a U shape and is connected to the right arm 11. The first adjusting unit 15A includes a first main body portion 157, a second main body portion 158, a connecting portion 159 connecting the first main body portion 157 and the second main body portion 158, the first adjusting portion 15A and the right arm 11. It has a pin 152 for fixing the relative positional relationship of (main body portion 11a). Two pins 152 are provided so as to sandwich the first adjusting portion 15A and face each other in the Y direction.
At one end of the first main body portion 157, a plurality of through holes 153 through which one pin 152 is inserted are formed. Further, at the other end of the second main body portion 158, a plurality of through holes 154 through which the other pin 152 is inserted are formed. The through hole 153 is provided around the rotation shaft Y ₁₁ , and the through hole 154 is provided around the rotation shaft Y ₁₂ .
Further, a through hole 155a through which the shaft portion 131 is inserted is formed in the first main body portion 157. Further, a through hole 155b through which the shaft portion 132 is inserted is formed in the second main body portion 158.

The connecting portion 159 is provided between the first main body portion 157 and the second main body portion 158, and has a first member 1591 and a second member 1592 that connect the two. The first member 1591 and the second member 1592 are each fixed to each main body portion via a screw 1593. The first main body portion 157, the second main body portion 158, and the connecting portion 159 form a through hole 160 through which the leaf spring 14 is inserted.

Since the first adjusting portion 15A can attach and detach the first main body portion 157 and the second main body portion 158 and the connecting portion 159 by the screw 1593, the leaf spring 14 can be easily inserted into the through hole 160. be able to.

Although the embodiments for carrying out the present invention have been described so far, the present invention should not be limited only to the above-described embodiments. As described above, the present invention may include various embodiments not described here, and various design changes and the like are made within a range that does not deviate from the technical idea specified by the claims. It is possible.

In the above-described embodiment, an example in which the positional relationship of the adjusting portion with respect to the arm is fixed by the pins 152 and 162 has been described, but if the positional relationship can be fixed, a configuration other than the pin can be applied. Configurations other than pins include, for example, splines and worm gears. These correspond to adjusting members. When a spline is used, a tooth portion is provided in the through hole and the relative positional relationship is adjusted by rotating the spline axis. When a worm gear is used, a worm and a worm wheel are provided with respect to the arm and the adjusting portion to adjust the relative positional relationship.

Further, in the above-described embodiment, a cushioning member such as rubber may be arranged at a portion (grip portion) of the arm in contact with the leaf spring, and the leaf spring may be supported via the cushioning member.

Further, in the above-described embodiment, the configuration in which the leaf spring is supported at a total of four locations by each arm and each adjusting portion has been described, but the configuration may be such that the leaf spring is supported at a plurality of locations of five or more locations.

Further, the suspension device according to the above-described embodiment may be provided in the vehicle in combination with another suspension device such as a suspension device using a coil spring.

As described above, the suspension device according to the present invention is suitable for adjusting the shape with respect to the installation target.

1 Suspension device 11 Right arm 11a, 12a, 13c, 151, 161 Main body 11b 1st link 12 Left arm 12b 2nd link 13 Member 13a, 13b Arm support 14 Leaf spring 15, 15A 1st adjustment 16 2nd adjustment Part 101, 102 Wheel 103, 104 Knuckle 131, 132 Shaft part 152, 162 Pin 153, 154, 155a, 155b, 156 Through hole 157 First body part 158 Second body part 159 Connection part

Claims (7)

A leaf spring that extends like a band,
A first arm that supports one end of the leaf spring,
A second arm that supports the other end of the leaf spring,
A connecting member that rotatably connects the first and second arms,
A first adjusting unit capable of adjusting the relative positional relationship of the first arm with respect to the connecting member, and
A second adjusting unit capable of adjusting the relative positional relationship of the second arm with respect to the connecting member, and
Suspension device characterized by being equipped with. The first adjusting unit adjusts the inclination of the first arm with respect to the connecting member.
The second adjusting unit adjusts the inclination of the second arm with respect to the connecting member.
The suspension device according to claim 1. The support positions of the leaf springs by the first and second adjusting portions are the first connecting position between the first arm and the connecting member, and the second connecting position between the second arm and the connecting member. Located between,
The suspension device according to claim 1 or 2, wherein the suspension device is characterized by the above. The first adjusting unit is
The first main body to be connected to the connecting member,
A first adjusting member that adjusts the positional relationship between the first main body and the first arm, and
Have,
The second adjusting unit is
A second main body to be connected to the connecting member,
A second adjusting member that adjusts the positional relationship between the second main body and the second arm, and
The suspension device according to claim 1 or 2, wherein the suspension device has. Through holes through which the leaf springs are inserted are formed in the first and second main bodies, respectively.
The suspension device according to claim 4, wherein the suspension device is characterized by the above. The first and / or second adjustment unit
The first main body and
The second main body and
A connection portion that is detachably connected to the first and second main body portions,
Have,
The first and second main body portions and the connection portion form a through hole through which the leaf spring is inserted.
The suspension device according to claim 1. The leaf spring is made of fiber reinforced plastic.
The suspension device according to any one of claims 1 to 5, wherein the suspension device is characterized in that.

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