JP2008095798A - Suspension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension device using a motor, which never impairs ride comfort in a vehicle even when a gas spring is applied. <P>SOLUTION: The suspension device A comprises a shock absorber S including a motion converting mechanism H converting relative motion of a vehicle body-side member and an axle-side member to rotational motion and a motor M provided with a rotor 8 to which the rotational motion is transmitted; and the gas spring C interposed between the vehicle body-side member and the axle-side member. The inside of a hollow casing 9 storing a stator 17 and the rotor 8 of the motor M is allowed to communicate with a gas chamber R of the gas spring C, and a wire 32 of the motor M is guided out of the suspension device A through the gas chamber R. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a suspension device.

This type of suspension device includes a coil spring as a suspension spring that elastically supports the vehicle body, a screw shaft that is rotatably engaged with a ball screw nut that is coupled to the axle side, and one end of the screw shaft that is coupled to the vehicle body side. And a motor that is connected to the vehicle and controls the relative movement between the vehicle body and the axle by the rotational torque generated by the motor.
Japanese Patent Laying-Open No. 2005-256923 (FIG. 1)

  By the way, in general, in suspension devices, the driver's line of sight changes when the height of the vehicle changes due to the loading of luggage on the vehicle or the increase or decrease in the number of passengers. Since the direction of the light changes as the position of the center of gravity changes, and the driving environment changes for the driver, the vehicle height is preferably constant regardless of the weight of the load loaded on the vehicle and the number of passengers. Further, when considering the attitude control of the vehicle, appropriate control is possible by keeping the vehicle height constant.

  In particular, in a large vehicle, it is easy to board the vehicle while the vehicle is stopped, and it is preferable to maintain a certain vehicle height for the above reason during traveling.

  Here, in order to adjust the vehicle height with the conventional suspension device, it is necessary to constantly maintain a state in which the rotational torque is generated in the motor, that is, to load the vehicle body weight borne by the coil spring on the motor.

  Then, since a current always flows in the coil of the motor, the coil itself generates heat, and when the motor temperature rises greatly due to the heat of the coil, the chemical change of the insulating coating of the conductive wire forming the coil As a result, there is a risk that the insulation will deteriorate, resulting in leakage of electric current and the like, and the motor itself may be damaged, and the magnet may be demagnetized due to the temperature rise of the motor.

  Therefore, in order to prevent the temperature of the motor from rising, the suspension height adjustment or the like may be performed on the suspension spring. To realize this, it is conceivable to use a gas spring as the suspension spring.

  When the gas spring is applied to a conventional suspension device using a motor, the overall size of the device must be increased. Therefore, an outer cylinder that connects the ball screw nut to the axle side, an inner shaft that accommodates the screw shaft, and the motor. The cylinder must be accommodated in the gas chamber, and the gas spring must maintain a high-pressure gas in a sealed state, so that there is no space between the inner cylinder and the outer cylinder or the outer periphery of the rotor of the motor. It is necessary to seal with a seal member that can withstand high pressure.

  Then, since the suspension device using a motor does not contain a liquid functioning as a lubricant such as hydraulic oil in the interior, if the seal member is provided as described above, the sliding friction at the seal portion is reduced. The sliding friction becomes extremely large, and the smooth expansion and contraction of the suspension device is remarkably inhibited, and the riding comfort in the vehicle is deteriorated.

  Therefore, the present invention was created in consideration of the above-mentioned problems, and the object of the present invention is to provide a suspension device using a motor that does not impair the riding comfort in a vehicle even when a gas spring is applied. Is to provide.

  In order to achieve the above object, a suspension device of the present invention includes a motion conversion mechanism that converts relative motion between a vehicle body side member and an axle side member into rotational motion, and a motor having a rotor to which the rotational motion is transmitted. A shock absorber, and a gas spring interposed between the vehicle body side member and the axle side member, and communicates with the gas chamber of the gas spring through the hollow casing in which the stator and rotor of the motor are housed. The motor wiring is characterized in that it is guided to the outside of the suspension device through the gas chamber.

  According to the suspension device of the present invention, the seal in the motor casing communicates with the gas chamber and the gas spring of the gas spring maintains the airtightness only in the wiring portion of the motor. In order to maintain this, it is possible to avoid a situation in which the sealing at the rotating part such as the outer periphery of the rotor of the motor or the sliding part such as the outer cylinder and the inner cylinder of the shock absorber is forced. The riding comfort in the vehicle is improved without obstructing the expansion and contraction operation.

  In addition, since there is no need to seal a portion that is likely to deteriorate, the suspension device can exhibit a stable function for a long period of time, and the reliability of the suspension device is improved in this respect.

  Furthermore, since the inside of the motor also functions as a part of the gas chamber of the gas spring, it is possible to shorten the overall length of the suspension device and to reduce the diameter, as the volume of the gas chamber is easily secured.

  The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view of a suspension device according to an embodiment. FIG. 2 is an enlarged longitudinal sectional view of a motor of the suspension device according to the embodiment. FIG. 3 is an enlarged longitudinal sectional view of a terminal member in the suspension device according to the embodiment.

  As shown in FIG. 1, a suspension apparatus A according to an embodiment includes a motion conversion mechanism H that converts linear relative motion between a vehicle body side member and an axle side member in a vehicle (not shown) into rotational motion, and the rotational motion described above. The shock absorber S includes a motor M to be transmitted, and a gas spring C interposed between the vehicle body side member and the axle side member.

  As shown in FIG. 1, the gas spring C in the suspension device A includes a cylindrical outer chamber R <b> 1 disposed on the outer peripheral side of the shock absorber S, and an outer cylinder 1 and an inner cylinder that form a cylinder of the shock absorber S. 2, and the gas chamber R is communicated with a casing 9 that is a housing of the motor M, and the gas of the gas spring C is also contained in the motor M. Part of the enclosed volume.

  The gas chamber R and the inside of the casing 9 in the gas spring C are not shown in the figure mounted on the vehicle via a valve 4 provided in a chamber member 37 which is one of the members forming the external chamber R1 of the gas spring C. It is connected to a gas supply / exhaust source such as a gas tank, and the vehicle height can be adjusted by changing the spring constant of the gas spring C or by actively supplying gas into the gas spring C.

  The shock absorber S rises from the bottom of the outer cylinder 1 having a bottomed cylindrical outer cylinder 1, an inner cylinder 2 slidably inserted into the outer cylinder 1 via annular bearings 34 and 35, and the outer cylinder 1. A ball screw nut 6, which is a screw nut provided at the upper end in FIG. 1 of the connecting cylinder 5 inserted into the inner cylinder 2, and is rotatably screwed into the ball screw nut 6 and at the upper inner periphery of the inner cylinder 2. A screw shaft 7 rotatably held by a provided bearing 28 and a motor M connected to the upper end in FIG. 1 of the inner cylinder 2 and a straight line of the ball screw nut 6 when the shock absorber S expands and contracts. The rotor 8 and the screw shaft 7 are connected so that the motion can be converted into the rotational motion of the screw shaft 7 and the rotational motion of the screw shaft 7 can be transmitted to the rotor 8 of the motor M.

  In the present embodiment, the shock absorber S is connected to the axle side member of the vehicle via the eye E provided at the lower end in FIG. Is connected to the vehicle body side member via a mount 10 coupled to the outer periphery of the upper end.

  That is, in the case of this embodiment, the motion conversion mechanism H is constituted by the screw shaft 7 and the ball screw nut 6, and the ball screw nut 6 moves linearly in the vertical direction in FIG. 1 with respect to the screw shaft 7. The rotation of the ball screw nut 6 is restricted by the outer cylinder 1 fixed to the axle side member via the connecting cylinder 5, so that the screw shaft 7 is forcibly driven to rotate. When the screw shaft 7 is driven to rotate, the rotation of the ball screw nut 6 is restricted, so that the ball screw nut 6 can be moved in the vertical direction.

  Further, the motor M can be energized positively to generate a torque in a direction opposite to the rotational direction of the screw shaft 7, thereby suppressing the rotational motion of the screw shaft 7 and simultaneously driving the screw shaft 7 to rotate. Therefore, the linear motion of the ball screw nut 6 can be controlled. Therefore, since the motor M functions as an actuator capable of controlling the relative linear motion of the outer cylinder 1 and the inner cylinder 2, the suspension device A can function as an active suspension.

  Further, the rotor 8 is forcibly driven to rotate by the rotational movement of the screw shaft 7, whereby a regenerative current flows through the motor M to generate an electromagnetic force, and this electromagnetic force gives a torque against the rotation of the screw shaft 7. Since the rotational movement of the screw shaft 7 can also be suppressed, the suspension device A also functions as a passive suspension.

 Note that the connecting cylinder 5 is not necessarily formed in a cylindrical shape, and may be any one that can connect the ball screw nut 6 to the outer cylinder 1 in a state where the rotation of the ball screw nut 6 is restricted.

 Since the bearings 34 and 35 are provided between the outer cylinder 1 and the inner cylinder 2, the inner cylinder 2 is prevented from being shaken with respect to the outer cylinder 1, and as a result, the screw shaft with respect to the ball screw nut 6 is prevented. 7 can be prevented from being concentrated on a part of the balls (not shown) of the ball screw nut 6 and a load applied to the ball or screw shaft 7 (not shown). ) Can be avoided.

 In addition, since the ball or the screw groove of the screw shaft 7 can be prevented from being damaged, the smoothness of each operation of the rotation of the screw shaft 7 with respect to the ball screw nut 6 and the movement of the shock absorber S in the expansion / contraction direction can be maintained. Since the smoothness of each of the above operations can be maintained, the function as the shock absorber S is not impaired, and the failure of the shock absorber S can be prevented.

  Furthermore, in the present embodiment, the motion conversion mechanism H is configured by the ball screw nut 6 and the screw shaft 7, but this may be configured by other configurations, for example, a rack and pinion, It is also possible to replace the ball screw nut 6 with a simple nut.

  Next, as shown in FIGS. 1 and 2, the motor M includes a hollow casing 9 connected to the upper end of the inner cylinder 2 in the figure, a cylindrical stator 17 that is fixedly accommodated in the casing 9, and The rotor 8 is arranged on the inner peripheral side of the stator 17 and is rotatably held by the casing 9.

  Specifically, the casing 9 includes a cylindrical casing body 11 whose top is closed in FIG. 1 and a base 12 that closes an opening of the casing body 11.

  A bearing 13 that rotatably holds the upper portion of the rotor 8 is fixed to the lower end side of the top portion of the casing body 11, and an opening through which the wiring 32 of the motor M can be drawn out to the lower side in FIG. 1. 15 is formed.

  Further, a bowl-shaped chamber connecting portion 14 is provided on the outer periphery of the casing body 11 so as to be integrated with a chamber member 37 to be described later via a vibration isolating rubber, and the casing 9 of the motor M is integrated with the chamber member 37. It has a structured structure.

  On the other hand, the base 12 is provided with a hole 19 that allows the rotor 8 to be inserted, and a bearing 20 that rotatably holds the lower portion of the rotor 8 is fitted into the inner periphery of the hole 19.

 The rotor 8 includes a shaft 25 and a magnet 27 attached to the outer periphery of the shaft 25 via a cylindrical yoke 26. The upper end of the shaft 25 is pivotally supported by the inner periphery of the bearing 13 described above. The lower end is pivotally supported by the inner periphery of the bearing 20, and the lower end is connected to the screw shaft 7.

 Further, the stator 17 fixed to the inner periphery of the casing body 11 includes a core 29 that is an armature core that faces the magnet 27 of the rotor 8, and a coil 30 that is fitted to the core 29. Therefore, the motor M is configured as a so-called brushless motor, but various motors such as a DC motor, an AC motor, an induction motor, and the like can be used as long as they can be used as an electromagnetic force generation source.

 The magnet 27 is formed in an annular shape and has a divided magnetic pole pattern in which the N pole and the S pole appear alternately along the circumference, but a plurality of magnets are bonded to form an annular shape. It may be formed.

  Further, sensor means 18 for detecting the position of the rotor 8 is accommodated and fixed in the casing body 11 and below the stator 17, and this sensor means 18 is, in this embodiment, The resolver is a resolver stator facing a resolver core 31 provided on the lower outer periphery of the shaft 25 of the rotor 8. The lead wire for energizing the resolver stator as the sensor means 18 and for transmitting detection signals to the coil 30 of the stator 17. The wiring 32 of the motor M composed of the lead wires for energization passes through the opening 15 and is drawn out of the motor M.

 The sensor means 18 for detecting the position of the rotor 8 may be a magnetic sensor such as a Hall element or a rotary encoder other than the resolver described above.

  Further, the motor M is connected to the mount 10 by being integrated with a chamber member 37 that constitutes a part of the mount 10, and the mount 10 is cylindrical and has a flange on the inner peripheral side of the upper end in FIG. And a chamber member 37 forming a chamber portion of the gas spring C, an annular plate 38 connected to a vehicle body side member (not shown) of the vehicle, a chamber connecting portion 14 provided in the casing 9 of the motor M, and the chamber member 37. And an anti-vibration rubber 40 for connecting the chamber member 37 and the plate 38 to each other.

  The gas spring C includes a chamber member 37 that forms a part of the mount 10, and a substantially hollow conical shape that is provided so as to cover the outer cylinder 1 with the base end coupled to the outer peripheral side portion of the outer cylinder 1. An outer chamber R1 formed of an air piston 41, a diaphragm 42 fixed to the lower end of the chamber member 37 in FIG. 1 and the upper end of the air piston 41 in FIG. And the inner chamber R2 formed by the inner cylinder 2. The outer chamber R1 and the inner chamber R2 are communicated with each other by a hole 3 provided in the upper end side portion of the inner cylinder 2, and the inner chamber R2 is a bearing. The inside of the casing 9 of the motor M is communicated with the inside of the motors 20 and 28.

  Therefore, the inside of the casing 9 of the motor M functions as a part of the gas chamber R of the gas spring C, and contributes to the volume.

  For communication between the outer chamber R1 and the inner chamber R2, the hole 3 provided in the inner cylinder 2 is used. However, a hole is formed in a side portion of the outer cylinder 1 facing the outer chamber R1. If the external chamber R1 and the internal chamber R2 can communicate with each other so as not to interfere with the function of the suspension device A, holes or passages for communicating with other positions may be provided. It may be.

  Further, a valve 4 is provided at a side portion of the chamber member 37, and gas can be supplied into or discharged from the gas chamber R through the valve 4.

  A hole 44 is provided in the side portion of the chamber member 37, and the terminal member 24 is fitted and attached to the hole 44. As shown in FIG. 3, the terminal member 24 includes a main body 24a fitted in the hole 44 in an airtight state, a plurality of holes 24b provided in the main body 24a for the number of wires 32 of the motor M, and the holes 24b. The cylindrical insulator 24c to be fitted and fixed, the rod-shaped conductor 24d to be inserted and fixed in the insulator 24c, and the body 24a from the right side in FIG. 3 to the middle of the conductor 24d are covered. It consists of resin 24e. Accordingly, the terminal member 24 itself is configured to prevent the passage of gas, and the gas chamber R of the gas spring C is hermetically sealed by fitting the main body 24a of the terminal member 24 into the hole 44 in an airtight state. Will be maintained in a state. Since the main body 24a is formed in a dish shape and is fixed to the chamber member 37 with the opening side facing the gas chamber R, the main body 24a falls off the chamber member 37 even when the pressure of the gas chamber R acts. It is prevented.

  The plurality of wires 32 of the motor M described above are drawn out of the chamber member 37 via the conductor 24d of the terminal member 24 and connected to an external power source (not shown) and a signal input terminal of the control device. .

  Specifically, it is divided into a part disposed in the chamber member 37 in the middle of the wiring 32 of the motor M and a part disposed outside the chamber member 37, and is disposed in the chamber member 37 of the wiring 32 of the motor M. The other end of the wire 24 is connected to one end of the conductor 24d protruding inward of the chamber member 37 by brazing or the like, and the other end of the wiring 32 of the motor M is disposed outside the chamber member 37. One end of the portion is connected to the other end of the conductor 24d protruding outward from the chamber member 37 by brazing or the like, and is disposed outside the chamber member 37 of the wiring 32 of the motor M. The other end of this part is connected to an external power source (not shown) and a signal input terminal of the control device.

  As described above, the wiring 32 of the motor M is connected to an external power source or the like installed outside the suspension device A while preventing leakage of gas from the hole 44 by the terminal member 24 even when passing through the gas chamber R. The gas chamber R is maintained in an airtight state.

  Further, instead of the terminal member 24 described above, a female connector or a terminal member provided with a male connector may be fitted in the hole 44 in an airtight state. By adopting such a terminal member, for example, if the terminal member employs a female connector, the end of the portion of the wiring 32 of the motor M that is disposed outside the chamber member 37 is used. If a male connector corresponding to the terminal member is connected, it is very easy and convenient to connect the wiring 32 of the motor M to an external power source or a control device.

  That is, in this suspension apparatus A, the inside of the casing 9 of the motor M is communicated with the gas chamber R, and the wiring 32 of the motor M is guided to the outside of the suspension apparatus A through the gas chamber R. The outer cylinder 1 and the inner cylinder 2 that form the cylinder of the shock absorber S without providing a seal in a portion that is difficult to maintain an airtight state such as a rotation portion on the outer periphery of the rotor 8 of the M rotor 8. Can be secured within.

  Since the opening 15 through which the wiring of the motor M is drawn faces the gas chamber, there is no need to provide a seal for keeping the inside of the motor M airtight even if the motor M is part of the gas chamber. Increase in the size of the suspension device A can be avoided.

  Furthermore, since the volume of the gas spring C can be secured in the outer cylinder 1 and the inner cylinder 2 that form the cylinder of the shock absorber S, the overall size of the suspension device A can be reduced between the hydraulic shock absorber and the hydraulic shock absorber. This is equivalent to a hydraulic suspension device provided with a gas spring on the outer periphery.

  Furthermore, since the inside of the motor M also functions as a part of the gas chamber R of the gas spring C, it is possible to reduce the overall length of the suspension device A and reduce the diameter by making it easier to secure the volume of the gas chamber R. In addition, the volume of the gas spring C can be secured in the outer cylinder 1 and the inner cylinder 2 that form the cylinder of the shock absorber S. Therefore, as in this embodiment, the gas spring Even if the motor M is arranged on the inner peripheral side of the outer chamber R1 of the C, the volume does not become insufficient, thereby further reducing the overall length of the suspension device A on which the gas spring C is mounted and further reducing the diameter. It becomes possible.

  In this embodiment, the wiring 32 of the motor M is guided outside the suspension device A through the external chamber R1 of the gas spring C provided on the side of the motor M. The length does not become unnecessarily long, the weight of the suspension device A does not become unnecessarily heavy, and an increase in cost is prevented.

  Furthermore, in this embodiment, the wiring 32 of the motor M passes through the seal member 24 attached to the hole 44 provided in the chamber member 37 and is guided to the outside of the suspension device A. Since the wiring 32 does not get in the way when attached to the vehicle, and the wiring 32 has a structure that goes out from the relatively upper side of the suspension device A, the wiring 32 is eroded by rainwater when the vehicle is running. Therefore, the utility of the suspension device A is improved.

  Furthermore, generally, it is necessary to provide a grommet made of rubber or the like that bears the seal around the wiring 32 and the holding of the wiring 32 in the opening 15 which is the wiring 32 and the lead-out port of the motor M. Since the inside of the casing 9 of the M forms a part of the gas chamber R and the opening 15 is disposed so as to face the external chamber R1 of the gas chamber R, the inside and outside of the motor M are located at the portion of the opening 15 Thus, the suspension device A can be manufactured at low cost because the number of parts can be reduced and the number of seals can be reduced.

  Now, the suspension device A of the present invention is configured as described above, and the operation thereof will be described below.

  First, the function of the shock absorber S in the suspension device A will be described. When the shock absorber S expands and contracts, that is, when the inner cylinder 2 moves up and down in FIG. The vertical motion of the ball screw nut 6 is converted into the rotational motion of the screw shaft 7 by the ball screw mechanism of the ball screw nut 6 and the screw shaft 7, and the shaft 25 of the motor M connected to the screw shaft 7. Also rotate.

  When the shaft 25 of the motor M exhibits a rotational motion, the coil 30 in the motor M crosses the magnetic field of the magnet 27, and an induced electromotive force is generated. The electromagnetic force caused by the induced electromotive force is generated in the shaft 25 of the motor M. The above torque acts, and the torque suppresses the rotational movement of the shaft 25.

  The effect of suppressing the rotational movement of the shaft 25 is to suppress the rotational movement of the screw shaft 7, and the rotational movement of the screw shaft 7 is suppressed, so that the linear motion of the ball screw nut 6 is suppressed. The shock absorber S generates a control force that acts as a damping force in this case by the electromagnetic force, and absorbs and relaxes vibration energy.

  When the current is actively supplied to the coil 30, the expansion and contraction of the shock absorber S can be freely controlled by adjusting the torque acting on the shaft 25, that is, within the range in which the control force of the shock absorber S can be generated. Since it can be freely controlled, the damping characteristic of the shock absorber S (a characteristic of the damping force with respect to the expansion / contraction speed) can be made variable, or the shock absorber S can function as an actuator.

  On the other hand, the gas spring C normally maintains the amount of gas in the gas spring C constant and elastically supports the vehicle body, thereby mitigating transmission of impact from the road surface to the vehicle body.

  Therefore, the suspension device A not only functions as a general passive suspension device as described above, but can also function as a semi-active or active suspension.

  In addition, since the suspension device A includes the gas spring C, the vehicle height can be adjusted by controlling the pressure in the gas chamber R of the gas spring C. There is no need to maintain a state where torque is generated in the motor M, insulation is deteriorated due to a chemical change or the like of the insulating film of the conductive wire forming the coil 30, and demagnetization of the magnet 27 due to a temperature rise of the motor M occurs. There is no risk of various problems caused by the heat generated by the coil 30.

  Further, as described above, the suspension device A frequently expands and contracts while the vehicle is running. However, the casing 9 of the motor M is communicated with the gas chamber R so that the gas chamber R of the gas spring C is airtight. Since the seal for maintaining is only the wiring 32 portion of the motor M, in order to maintain the airtightness of the gas chamber R, the rotation part such as the outer periphery of the rotor 8 of the motor M or between the outer cylinder 1 and the inner cylinder 2 is used. The situation in which the seal at the sliding portion is forced to be avoided can be avoided, the sliding resistance of the seal does not hinder the expansion and contraction operation of the suspension device A, and the riding comfort in the vehicle is improved and is likely to deteriorate. Since there is no need to seal the part, the suspension device A can exhibit a stable function for a long period of time, and the reliability of the suspension device A is improved in this respect. .

  In the above-described embodiment, the rotor 8 of the motor M is connected to the screw shaft 7. However, the rotor 8 is connected to the ball screw nut 6 and the screw shaft 7 is connected to the outer cylinder 1. As an alternative, the ball screw nut 6 may be rotated to linearly move the screw shaft 7. In this case, it is preferable to secure the stroke length of the suspension device A by allowing the rotor 8 to be hollow and allowing the screw shaft 7 to enter the motor M to some extent. Further, although the motor M is slightly increased in size, it is also possible to adopt a configuration in which the magnet 27 is directly attached to the outer periphery of the ball screw nut 6 and this is used as a rotor.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

It is a longitudinal cross-sectional view of the suspension apparatus in one embodiment. It is an expansion longitudinal cross-sectional view of the motor of the suspension apparatus in one embodiment. It is an expanded vertical sectional view of the terminal member in the suspension apparatus of one embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Inner cylinder 3,19,44 Hole 4 Valve | bulb 5 Connecting cylinder 6 Ball screw nut 7 Screw shaft 8 Rotor 10 Mount 9 Casing 11 Casing body 12 Base 13, 20, 28 Bearing 14 Chamber connection part 15 Opening part 17 Stator 18 sensor means 24 terminal member 25 shaft 26 yoke 27 magnet 29 core 30 coil 31 resolver core 32 wiring 34, 35 annular bearing 37 chamber member 38 plate 39, 40 anti-vibration rubber 41 air piston 42 diaphragm A suspension device C gas spring E eye H Motion conversion mechanism M Motor R Gas chamber R1 External chamber R2 Internal chamber S Buffer

Claims (6)

A shock absorber having a motion conversion mechanism that converts relative motion between the vehicle body side member and the axle side member into rotational motion, and a motor having a rotor to which the rotational motion is transmitted, and between the vehicle body side member and the axle side member In a suspension device including an intervening gas spring, a hollow casing in which a motor stator and a rotor are accommodated communicates with the gas chamber of the gas spring, and the motor wiring passes through the gas chamber to the outside of the suspension device. A suspension device characterized by being guided. The gas chamber of the gas spring is formed in a cylindrical shape and includes an external chamber disposed so as to cover the outer periphery of the shock absorber and an internal chamber formed in a cylindrical body that houses the motion conversion mechanism inside, and the motor wiring is external 2. The suspension device according to claim 1, wherein the suspension device is guided through the chamber to the outside of the suspension device. The suspension apparatus according to claim 1 or 2, wherein the wiring of the motor is drawn out of the motor through an opening provided in the casing, and the opening faces the gas chamber. The external chamber is formed by a chamber member disposed on the outer peripheral side of the casing, an air piston connected to the motion conversion mechanism and exhibiting relative motion with respect to the chamber member, and a diaphragm connected to the chamber member and the air piston. The motor wiring is led to the outside of the suspension device through a terminal member that is attached to a hole provided in the chamber member and can maintain the airtightness of the gas chamber. The suspension device described. The suspension device according to claim 4, wherein the chamber member is integrated with a casing of the motor. 6. The suspension device according to claim 4, wherein the chamber member is provided with a connector connected to the wiring of the motor in the external chamber.

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