JP7116677B2 - suspension device - Google Patents

Description

The present invention relates to suspension devices.

A strut-type damper (suspension device) having a coil spring arranged concentrically around a shock absorber is known (see Patent Document 1). A coil spring is arranged between an upper spring seat and a lower spring seat of the damper. A lower spring seat (spring guide) includes an annular member that supports the coil spring, and a tubular member that extends from the annular member. A tubular member is disposed around the outer tube of the shock absorber. The ends of the tubular member abut support rings welded to the outer tube.

U.S. Patent Application Publication No. 2016/0023529

The suspension device described in Patent Document 1 is used with the spring guide sandwiched between the coil spring and the support ring. Therefore, the spring guide will not come off from the shock absorber cylinder during use of the suspension device.

However, when the suspension device is assembled, in a state in which the spring guide is fitted to the cylinder of the shock absorber and before the coil spring is attached, an external force acts on the spring guide, causing the spring guide to disengage the shock absorber. There is a risk that it will come off. As a result, the efficiency of the assembly work of the suspension device may deteriorate.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the efficiency of assembly work of a suspension device.

The present invention is a suspension device comprising a shock absorber provided between a vehicle body and a wheel, an upper mount attached to the tip of a rod, a spring guide attached to the outer peripheral surface of a cylinder, a spring guide and an upper mount. A coil spring that is provided between and elastically supports the vehicle body, and a contractile member that is formed in a cylindrical shape and tightens the outer periphery of the spring guide by contractive force. The spring guide is provided with an insertion hole through which the shock absorber is inserted. , and a fixing part that is tightened by a shrinkable member, and the shrinkable member is a heat-shrinkable member that shrinks by heat and tightens the fixing part by its contractive force, and the fixing part and a part of the cylinder are collectively It is characterized by covering.

In this invention, movement of the spring guide is restricted by the contractile member when an external force acts on the spring guide. This can prevent the spring guide from coming off the shock absorber. Furthermore, the spring guide can be fixed to the cylinder by attaching the tubular heat-shrinkable member to the cylinder and heating it, so that the operation of attaching the spring guide to the cylinder can be easily performed.

In the present invention, the spring guide has a tubular portion having an insertion hole on the inner periphery, the fixing portion is provided at the end of the tubular portion, and the contractile member is part of the fixing portion and the cylinder. By covering the entire circumference of the cylinder, the gap between the cylinder and the insertion hole is closed.

In this invention, the contractile member can prevent foreign matter such as sand and water from entering the gap between the cylinder and the insertion hole.

In the present invention, the spring guide has a tubular portion with an inner circumference formed as an insertion hole, and the tubular portion has a main body portion and a plurality of fixing portions protruding from the main body portion in the axial direction. The contractile member collectively covers the fixed portion and the outer peripheral surface of the cylinder between the fixed portions adjacent in the circumferential direction.

In the present invention, since the outer peripheral surface of the cylinder between the fixed portions adjacent in the circumferential direction is covered with the contractile member, the covering area (contact area) of the contractile member with respect to the cylinder necessary for fixing the spring guide to the cylinder is can be easily secured.

The present invention is a suspension device comprising a shock absorber provided between a vehicle body and a wheel, an upper mount attached to the tip of a rod, a spring guide attached to the outer peripheral surface of a cylinder, a spring guide and an upper mount. A coil spring that is provided between and elastically supports the vehicle body, and a contractile member that is formed in a cylindrical shape and tightens the outer periphery of the spring guide by contractive force. The spring guide is provided with an insertion hole through which the shock absorber is inserted. , a fixing portion that is tightened by a contractile member, and a tubular tubular portion having an inner circumference formed as an insertion hole, wherein the tubular portion includes a main body and a plurality of fixing portions protruding from the main body in the axial direction. and wherein the contractile member collectively covers the fixed portion and the outer peripheral surface of the cylinder between the fixed portions adjacent in the circumferential direction.

In this invention, movement of the spring guide is restricted by the contractile member when an external force acts on the spring guide. This can prevent the spring guide from coming off the shock absorber. Furthermore, since the outer peripheral surface of the cylinder between the fixing portions adjacent in the circumferential direction is covered with the contractile member, the covering area (contact area) of the contractile member with respect to the cylinder, which is necessary for fixing the spring guide to the cylinder, can be easily increased. can be secured to

The present invention is characterized in that the contractile member is an elastic member that elastically tightens the fixed portion.

In this invention, the spring guide can be fixed to the cylinder by elastically deforming the cylindrical elastic member and attaching it to the cylinder, so that the operation of attaching the spring guide to the cylinder can be easily performed.

According to the present invention, it is possible to improve the efficiency of the assembly work of the suspension device.

1 is a partial cross-sectional view of a suspension device according to an embodiment of the invention; FIG. 1 is a perspective view of a spring guide according to an embodiment of the invention; FIG. FIG. 4 is an enlarged schematic cross-sectional view showing an attachment portion of the spring guide to the cylinder in the suspension device according to the embodiment of the present invention, showing a state before the tube is heated; FIG. 4 is an enlarged schematic cross-sectional view showing an attachment portion of the spring guide to the cylinder in the suspension device according to the embodiment of the present invention, showing a state after the tube is heated and contracted. It is a figure explaining a mode that an intermediate assembly is conveyed. FIG. 11 is a schematic cross-sectional plan view of a tubular portion of a spring guide according to Modification 4 of the embodiment of the present invention, taken along a plane orthogonal to the axial direction; FIG. 11 is an enlarged schematic cross-sectional view showing an attachment portion of a spring guide to a cylinder in a suspension device according to Modification 4 of the embodiment of the present invention;

A suspension device 10 according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional view of the suspension device 10. FIG. As shown in FIG. 1, a suspension device 10 is mounted on an automobile (not shown) to position wheels (not shown) and generate damping force to absorb shocks and vibrations received from the road surface while the vehicle is running. It is a device that stably suspends the vehicle body by

The suspension device 10 includes a strut-type shock absorber 1 provided between the vehicle body and the wheels, an upper mount 2 attached to the tip of a piston rod (hereinafter referred to as a rod) 1a of the shock absorber 1, and the shock absorber 1. a spring guide 100 attached to the outer peripheral surface of the cylinder 1b; a coil spring 4 provided between the spring guide 100 and the upper mount 2 for elastically supporting the vehicle body; A bump stopper 5 for restricting the stroke, a bump cap 6 as a cap member fitted to the rod 1a side end of the cylinder 1b, a dust boot 7 as a cylindrical cover member for protecting the rod 1a, and a cylinder and a tube 170 as a shrinkable member that is formed into a shape and tightens the outer circumference of the spring guide 100 by a shrinkage force.

The shock absorber 1 has a cylinder 1b and a cylindrical rod 1a projecting from an opening 142 (see FIGS. 3A and 3B) of the cylinder 1b. The shock absorber 1 is a twin-tube shock absorber, and the cylinder 1b includes a bottomed cylindrical outer tube 11o that forms the outer shell of the cylinder 1b, and an inner tube 11i (Fig. 3A, See FIG. 3B). A piston (not shown) that divides the inner tube 11i into an expansion side chamber and a compression side chamber is connected to the lower end of the rod 1a.

The rod 1a is slidably supported by a rod holding portion 145 (see FIGS. 3A and 3B) provided at the open end of the outer tube 11o. The rod holding portion 145 has a layered structure in which a dust seal, an oil seal, a bearing, etc. are layered. The rod holding portion 145 and the inner tube 11i are axially sandwiched between a crimped portion 141 (see FIGS. 3A and 3B) formed by crimping the upper end portion of the outer tube 11o inward and the bottom portion of the outer tube 11o. be done.

As shown in FIG. 1, a bracket 1c for connecting a hub carrier (not shown) holding a wheel and the shock absorber 1 is provided at the end of the cylinder 1b opposite to the rod 1a side. For convenience of explanation, the vertical direction is defined such that the upper mount 2 side is the upper side of the suspension device 10 and the bracket 1c side is the lower side of the suspension device 10 . The vertical direction of the suspension device 10 is the axial direction (central axis direction) of the suspension device 10 and the extension and contraction direction of the shock absorber 1 . Moreover, the radial direction of the suspension device 10 (the radial direction of the shock absorber 1 ) is orthogonal to the axial direction of the suspension device 10 .

The shock absorber 1 is connected to the vehicle body via the upper mount 2, and is connected to the hub carrier by the bracket 1c, and assembled to the vehicle. The shock absorber 1 configured in this way is configured to generate a damping force when the rod 1a moves in the axial direction (vertical direction in FIG. 1) with respect to the cylinder 1b. The suspension device 10 quickly damps the vibration of the vehicle body by the damping force of the shock absorber 1 .

The coil spring 4 is sandwiched between the upper mount 2 and the spring guide 100 in a compressed state, and urges the shock absorber 1 in the extension direction. A rubber sheet 8 is provided between the upper mount 2 and the coil spring 4 . This prevents the upper mount 2 and the coil spring 4 from coming into direct contact with each other. An arc-shaped rubber sheet 40 is provided between the spring guide 100 and the coil spring 4 . This prevents the spring guide 100 and the coil spring 4 from coming into direct contact with each other.

FIG. 2 is a perspective view of the spring guide 100. FIG. As shown in FIGS. 1 and 2, the spring guide 100 is a dish-shaped resin member fixed to the outer periphery of the cylinder 1b. The spring guide 100 includes a disk-shaped base portion 110 that supports the coil spring 4 , side walls 111 that extend upward (upper mount 2 side) from the outer edge of the base portion 110 , and the base portion 110 as the axis of the suspension device 10 . A through hole 120 which is an opening through which the cylinder 1b of the shock absorber 1 is inserted, and a base portion 110 projecting upward and downward from the base portion 110 to surround the through hole 120. It has a cylindrical tubular portion 112 and a bottomed cylindrical hub 113 .

The periphery of the hub 113 in the base portion 110 is a mounting area to which the rubber sheet 40 is mounted. The base portion 110 is provided with a position regulating portion (not shown) that regulates the position of the rubber sheet 40 . The rubber sheet 40 is made of an elastic material such as rubber. The rubber sheet 40 is provided with a seating portion 40 a (see FIG. 1 ) whose cross section is curved along the cross-sectional shape of the coil spring 4 . A plurality of through-holes (not shown) are formed in the spring guide 100 in order to reduce the weight of the spring guide 100 and to drain water accumulated in the base portion 110 .

A tubular portion 112 protruding axially from the base portion 110 has an insertion hole 120 having a circular inner circumference. As shown in FIG. 1, the insertion hole 120 is formed so as to be eccentric from the center of the spring guide 100 toward the vehicle body when the spring guide 100 is fixed to the outer circumference of the cylinder 1b.

A support ring 3 made of metal is fixed to the outer periphery of the cylinder 1b by welding. The spring guide 100 is fixed to the outer periphery of the cylinder 1b by fitting the insertion hole 120 to the outer periphery of the cylinder 1b and supporting the lower end of the cylindrical portion 112 of the spring guide 100 by the support ring 3 .

The fitting between the cylinder 1b and the insertion hole 120, specifically, the fitting between the cylinder 1b and the rib 122 (see FIG. 2) formed in the insertion hole 120 may be a "clearance fit" or " It may be an "interference fit". When the "tight fit" is adopted, there is no looseness between the insertion hole 120 and the cylinder 1b, and noise due to looseness can be prevented. Also, the responsiveness of the operation of the suspension device 10 can be improved.

The spring guide 100 is fitted into the cylinder 1b from above and is attached to the cylinder 1b by coming into contact with the support ring 3 . In other words, the cylinder 1b is inserted from the lower open end 125L of the insertion hole 120 of the spring guide 100. As shown in FIG. That is, the lower open end 125L is an inlet into which the cylinder 1b is inserted, and the upper end of the cylinder 1b protrudes from the upper open end 125U, which is the open end on the opposite side of the lower open end 125L.

As shown in FIG. 2 , the insertion hole 120 is provided with a rib 122 as a projection projecting radially inward from an inner peripheral surface 121 of the insertion hole 120 . The rib 122 functions as a support that supports the outer peripheral surface of the cylinder 1b of the shock absorber 1. As shown in FIG. Each rib 122 is provided linearly along the axial direction of the insertion hole 120 (that is, the axial direction of the suspension device 10).

The rib 122 is, for example, formed to have a rounded trapezoidal or semicircular cross-sectional shape, and is in line contact with the outer peripheral surface of the cylinder 1b. A plurality of ribs 122 are arranged at equal intervals along the circumferential direction of insertion hole 120 . Therefore, the spring guide 100 is positioned such that the central axis of the insertion hole 120 coincides with the central axis of the cylinder 1b.

As shown in FIGS. 2 and 3B, the cylindrical portion 112 has a cylindrical body portion 112a and a cylindrical fixing portion 112b extending in one axial direction (upward) from the body portion 112a. In other words, the fixed portion 112b is provided at the end (upper end) of the cylindrical portion 112 on the upper mount side. The inner circumference of the main body portion 112a and the inner circumference of the fixed portion 112b are continuous, and the insertion hole 120 is formed by the inner circumference of the main body portion 112a and the inner circumference of the fixed portion 112b.

The outer diameter of the fixing portion 112b is smaller than the outer diameter of the main body portion 112a. For this reason, a stepped portion 112 c is formed on the outer peripheral surface of the upper end portion of the tubular portion 112 . As shown in FIG. 3B, the fixed portion 112b is tightened radially inward by a tube 170 that collectively covers the fixed portion 112b and part of the outer peripheral surface of the cylinder 1b.

The tube 170 is a tubular heat-shrinkable member that shrinks radially by heat and tightens the fixing portion 112b by the shrinkage force. Tube 170 is manufactured, for example, as follows.

First, a resin material whose main raw material is polyethylene, polyolefin, fluoropolymer, or the like is extruded into a cylindrical shape. After that, an electron beam is irradiated for cross-linking. Further, the crosslinked member is heated to soften it, expanded in diameter by applying internal pressure or the like, and cooled to fix the shape. This completes the tube 170 to which the heat-shrinkable property is imparted. Note that the tube 170 has elasticity in a contracted and hardened state (the state shown in FIG. 3B).

A method of fixing the spring guide 100 to the cylinder 1b with the tube 170 will be described with reference to FIGS. 3A and 3B. 3A and 3B are enlarged schematic cross-sectional views showing an attachment portion of the spring guide 100 to the cylinder 1b. 3A shows the state before tube 170 is heated, and FIG. 3B shows the state after tube 170 is heated and contracted. Note that the inner diameter of the tube 170 before being shrunk by heating is larger than the outer diameter of the cylinder 1b.

First, as shown in FIG. 3A, the tube 170 before contraction is arranged so as to straddle the tip of the fixing portion 112b. For example, as shown in the figure, one end of the tube 170 is arranged on the stepped portion 112c, and the tube 170 is arranged so as to cover the outer peripheral surface of the fixed portion 112b and part of the outer peripheral surface of the cylinder 1b from the outside in the radial direction. At this time, the tube 170 can be easily positioned by bringing the lower end face of the tube 170 into contact with the end face of the main body portion 112a forming the stepped portion 112c.

As shown in FIG. 3A, after the tube 170 is arranged so as to partially cover the outer peripheral surface of the fixing portion 112b and the outer peripheral surface of the cylinder 1b, the tube 170 is heated to shrink and harden. Thereby, as shown in FIG. 3B, the tube 170 is brought into close contact with the surface of the fixing portion 112b and the cylinder 1b.

The tube 170 includes a cylinder contact portion 171 that contracts according to the outer diameter of the cylinder 1b and is in close contact with the outer peripheral surface of the cylinder 1b, and a cylinder contact portion 171 that contracts according to the outer diameter of the fixed portion 112b and contacts the outer peripheral surface of the fixed portion 112b. A fixing portion adhesion portion 172 that is in close contact with is formed. The cylinder contact portion 171 and the fixed portion contact portion 172 are arranged adjacent to each other in the axial direction.

By attaching and heating the tube 170 to the cylinder 1b in this way, the spring guide 100 can be fixed to the cylinder 1b, so that the operation of attaching the spring guide 100 to the cylinder 1b can be easily performed.

The spring guide 100 is axially positioned by the lower end of the cylindrical portion 112 being supported by the support ring 3 (see FIG. 1) and the upper end of the cylindrical portion 112 being fixed by the tightening force of the tube 170 . That is, the tube 170 tightens the upper end portion of the tubular portion 112 of the spring guide 100 radially inward, thereby restricting axial movement of the spring guide 100 with respect to the cylinder 1b.

As shown in FIG. 4, in the process of assembling the suspension device 10, the intermediate assembly 90 in which the spring guide 100 is fitted to the cylinder 1b of the shock absorber 1 is lifted by a lifting tool 91 and transported to a predetermined location. There is The coil spring 4, upper mount 2, bump stopper 5, etc. are not attached to the intermediate assembly 90. As shown in FIG.

The lifting tool 91 supports the base portion 110 of the spring guide 100 so as to lift it from below, and lifts the intermediate assembly 90 . In this embodiment, the upper end of the tubular portion 112 of the spring guide 100 is fixed to the outer peripheral surface of the cylinder 1b by a tube 170. As shown in FIG. Therefore, even if an upward external force acts on the spring guide 100 from the hanging tool 91, it is possible to prevent the spring guide 100 from coming off the cylinder 1b. Further, in this embodiment, the spring guide 100 can be fixed to the cylinder 1b by the tube 170, so there is no need to fix the spring guide 100 to the cylinder 1b by press-fitting. When the spring guide 100 made of resin is firmly fixed to the cylinder 1b by press-fitting, the spring guide 100 may crack due to the press-fitting. In contrast, in the present embodiment, the spring guide 100 does not need to be fixed to the cylinder 1b by press-fitting, so cracks due to press-fitting can be prevented.

Vehicles are used in various environments. For example, when the vehicle travels in an area with heavy snowfall, the suspension device 10 may come into contact with water containing snow-melting agents. The snow melting agent contains calcium chloride. Therefore, if water containing calcium chloride enters between the outer periphery of the cylinder 1b and the inner periphery of the insertion hole 120, the inner periphery of the insertion hole 120 may deteriorate and be damaged.

In this embodiment, the tube 170 covers the fixed portion 112b provided at the upper end portion of the cylindrical portion 112 and part of the cylinder 1b over the entire circumference of the cylinder 1b, so that the outer circumference of the cylinder 1b and the insertion hole 120 is closed.

Therefore, the tube 170 can prevent foreign matter such as sand and water from entering the gap between the cylinder 1 b and the insertion hole 120 . Therefore, it is possible to prevent deterioration and damage caused by foreign matter entering the gap between the outer circumference of the cylinder 1b and the inner circumference of the insertion hole 120. FIG.

According to the embodiment described above, the following effects are obtained.

The tube 170 collectively covers the fixing portion 112b and a part of the cylinder 1b, tightens the fixing portion 112b by its contractive force, and fixes the spring guide 100 to the cylinder 1b. Therefore, when the suspension device 10 is assembled, the tube 170 restricts the axial movement of the spring guide 100 with respect to the cylinder 1b when an external force acts on the spring guide 100 .

This can prevent the spring guide 100 from coming off the shock absorber 1 during assembly of the suspension device 10 . Therefore, the efficiency of the assembly work of the suspension device 10 can be improved.

Further, in the assembly work of the suspension device 10, a process of supporting the spring guide 100 by the hanging tool 91, lifting the intermediate assembly 90, and transporting it to a predetermined place can be employed. high degree of freedom.

The following modifications are also within the scope of the present invention, and it is also possible to combine the configurations shown in the modifications with the configurations described in the above embodiments, or to combine the configurations described in the following different modifications. is.

<Modification 1>
In the above embodiment, an example was described in which the tube 170 formed in a cylindrical shape in advance is placed on the stepped portion 112c (see FIG. 3A) and heated to shrink and harden (see FIG. 3B), but the present invention is limited to this. not. For example, as the heat-shrinkable member, a band-shaped tape is wound several times around the fixed portion 112b and part of the outer peripheral surface of the cylinder 1b to form a tubular shape, and the tubular tape made up of multiple layers is heated to shrink and harden. may

<Modification 2>
In the above embodiment, an example in which the tube 170 is a heat-shrinkable member has been described, but the present invention is not limited to this. For example, the tube 170 may be a member that does not have heat-shrinkable properties, and may be an elastic member such as rubber that elastically tightens the fixing portion 112b. In this case, the inner diameter of the tube 170 is smaller than the outer diameter of the cylinder 1b when no external force acts on the tube 170 .

The tube 170 is fitted in the cylinder 1b in a state in which it is pulled radially outward and expanded in diameter (see FIG. 3A). With the lower end of the tube 170 placed on the stepped portion 112c, the tube 170 contracts radially due to elastic contraction when the tensile force is released, and tightens the fixing portion 112b radially inward ( See Figure 3B).

According to this modification, the spring guide 100 can be fixed to the cylinder 1b by elastically deforming the tube 170 as a cylindrical elastic member and attaching it to the cylinder 1b. can be easily attached to the

<Modification 3>
In the above embodiment, an example was described in which the outer diameter of the fixed portion 112b formed in the tubular portion 112 of the spring guide 100 was smaller than the outer diameter of the main body portion 112a (see FIGS. 2 and 3B). is not limited to this. The outer diameter of the fixing portion 112b may be the same as the outer diameter of the main body portion 112a, or may be larger than the outer diameter of the main body portion 112a.

However, if the outer diameter of the cylinder 1b and the outer diameter of the fixed portion 112b are significantly different, excessive tensile stress may be generated between the cylinder contact portion 171 and the fixed portion contact portion 172. FIG. For this reason, it is preferable to form the cylindrical portion 112 so that the outer diameter of the fixed portion 112b is smaller than the outer diameter of the main body portion 112a, as in the above embodiment. Thereby, it is possible to prevent excessive tensile stress from occurring in the tube 170 . Further, since the thickness of the main body portion 112a is larger than that of the fixed portion 112b, it is possible to ensure the strength required for the cylindrical portion 112 that holds the outer circumference of the cylinder 1b.

<Modification 4>
In the above embodiment, an example in which the fixed portion 112b formed on the cylindrical portion 112 is cylindrical has been described, but the present invention is not limited to this. Various shapes can be adopted for the shape of the fixing portion 112b. A mounting structure of the spring guide 200 and the cylinder 1b according to Modification 4 of the present embodiment will be described with reference to FIGS. FIG. 5 is a schematic cross-sectional plan view of the cylindrical portion 212 of the spring guide 200 cut along a plane perpendicular to the axial direction, and FIG. 6 is a schematic enlarged cross-sectional view showing an attachment portion of the spring guide 200 to the cylinder 1b. is. In FIG. 5, illustration of the structure inside the cylinder 1b is omitted.

In this modified example, as shown in FIGS. 5 and 6, a fixing member is fixed to the cylindrical portion 212 of the spring guide 200 so as to protrude in one direction (upward) in the axial direction from the end surface of the main body portion 112a (upper opening edge portion of the insertion hole 120). A plurality of portions 212b are provided.

In this modification, the spring guide 200 can be fixed to the cylinder 1b by collectively covering the fixed portion 212b and the outer peripheral surface of the cylinder 1b between the fixed portions 212b adjacent in the circumferential direction with the tube 270. The tube 270 according to this modification has a cylinder contact portion 271 that is in close contact with the outer peripheral surface of the cylinder 1b, and a fixing portion contact portion 272 that is in close contact with the outer peripheral surface of the fixing portion 212b. The cylinder contact portion 271 and the fixed portion contact portion 272 are arranged adjacent to each other in the circumferential direction. In this modification, since the outer peripheral surface of the cylinder 1b between the fixing portions 212b adjacent in the circumferential direction is covered with the tube 270, the covering area of the tube 270 with respect to the cylinder necessary for fixing the spring guide 200 to the cylinder 1b ( contact area) can be easily secured.

<Modification 5>
In the above-described embodiment, an example in which the spring guide 100 is made of resin has been described, but the present invention is not limited to this. For example, the spring guide 100 may be made of metal.

The configuration, action, and effects of the embodiment of the present invention configured as described above will be collectively described.

A suspension device 10 has a cylinder 1b and a rod 1a projecting from the cylinder 1b, a shock absorber 1 provided between a vehicle body and a wheel, an upper mount 2 attached to the tip of the rod 1a, and an outer circumference of the cylinder 1b. Spring guides 100, 200 attached to the surface, coil springs 4 provided between the spring guides 100, 200 and the upper mount 2 for elastically supporting the vehicle body, and cylindrically formed outer circumferences of the spring guides 100, 200 The spring guides 100 and 200 include insertion holes 120 through which the shock absorber 1 is inserted, and fixing portions 112b and 212b that are tightened by the tubes 170 and 270. , and the tubes 170 and 270 collectively cover the fixed portions 112b and 212b and part of the cylinder 1b.

In this configuration, when an external force acts on spring guides 100 and 200, movement of spring guides 100 and 200 is restricted by tubes 170 and 270. As shown in FIG. This can prevent the spring guides 100 and 200 from coming off the shock absorber 1 . Therefore, the efficiency of the assembly work of the suspension device 10 can be improved.

In the suspension device 10, the spring guide 100 has a tubular portion 112 having a through hole 120 on the inner circumference, the fixing portion 112b is provided at the end of the tubular portion 112, and the tube 170 is the fixing portion. The gap between the cylinder 1b and the insertion hole 120 is closed by covering the entire circumference of the cylinder 1b with the 112b and part of the cylinder 1b.

In this configuration, the tube 170 can prevent foreign matter such as sand and water from entering the gap between the cylinder 1 b and the insertion hole 120 .

In the suspension device 10, the spring guide 200 has a tubular portion 212 having an inner circumference formed as an insertion hole 120. The tubular portion 212 includes a main body portion 112a and a plurality of axially projecting portions protruding from the main body portion 112a. The tube 270 collectively covers the fixing portion 212b and the outer peripheral surface of the cylinder 1b between the fixing portions 212b adjacent in the circumferential direction.

In this configuration, the outer peripheral surface of the cylinder 1b between the fixed portions 212b adjacent in the circumferential direction is covered with the tube 270. Therefore, the covering area of the tube 270 with respect to the cylinder 1b required for fixing the spring guide 200 to the cylinder 1b ( contact area) can be easily secured.

The suspension device 10 is a heat-shrinkable member in which the tubes 170, 270 are shrunk by heat, and the contraction force tightens the fixed portions 112b, 212b.

In this configuration, the spring guides 100 and 200 can be fixed to the cylinder 1b by attaching the cylindrical tubes 170 and 270 to the cylinder 1b and heating them, so that the operation of attaching the spring guides 100 and 200 to the cylinder 1b is eliminated. can be easily done.

The suspension device 10 is an elastic member in which the tubes 170, 270 elastically tighten the fixed portions 112b, 212b.

In this configuration, the spring guides 100 and 200 can be fixed to the cylinder 1b by elastically deforming the cylindrical tubes 170 and 270 and attaching them to the cylinder 1b. can be easily done.

Although the embodiments of the present invention have been described above, the above embodiments merely show a part of application examples of the present invention, and the technical scope of the present invention is not limited to the specific configurations of the above embodiments. do not have.

Reference Signs List 1 Shock absorber 1a Rod 1b Cylinder 2 Upper mount 4 Coil spring 10 Suspension device 100, 200 Spring guide 112 , 212... cylinder part, 112a... body part, 112b, 212b... fixed part, 120... insertion hole, 170, 270... tube (contractile member)

Claims (5)

a shock absorber having a cylinder and a rod projecting from the cylinder and provided between a vehicle body and a wheel;
an upper mount attached to the tip of the rod;
a spring guide attached to the outer peripheral surface of the cylinder;
a coil spring provided between the spring guide and the upper mount for elastically supporting the vehicle body;
a contractile member that is formed in a cylindrical shape and that tightens the outer circumference of the spring guide by a contractive force,
The spring guide has an insertion hole through which the shock absorber is inserted, and a fixing portion that is tightened by the contractile member,
The shrinkable member is a heat-shrinkable member that shrinks by heat and tightens the fixed portion by its contractive force, and collectively covers the fixed portion and part of the cylinder. The suspension device according to claim 1,
The spring guide has a tubular portion with an inner circumference serving as the insertion hole,
The fixing portion is provided at an end portion of the tubular portion,
The contractile member closes a gap between the cylinder and the insertion hole by covering the fixing portion and a part of the cylinder over the entire circumference of the cylinder. Device. The suspension device according to claim 1,
The spring guide has a tubular portion with an inner circumference serving as the insertion hole,
the cylindrical portion has a body portion and a plurality of the fixing portions projecting axially from the body portion;
The suspension device, wherein the contractile member collectively covers the fixed portion and an outer peripheral surface of the cylinder between the fixed portions adjacent in the circumferential direction. a shock absorber having a cylinder and a rod projecting from the cylinder and provided between a vehicle body and a wheel;
an upper mount attached to the tip of the rod;
a spring guide attached to the outer peripheral surface of the cylinder;
a coil spring provided between the spring guide and the upper mount for elastically supporting the vehicle body;
a contractile member that is formed in a cylindrical shape and that tightens the outer periphery of the spring guide by a contractive force,
The spring guide has an insertion hole through which the shock absorber is inserted, a fixing portion that is tightened by the contractile member, and a tubular portion having an inner periphery that is the insertion hole,
the cylindrical portion has a body portion and a plurality of the fixing portions projecting axially from the body portion;
The contractile member collectively covers the fixed portion and the outer peripheral surface of the cylinder between the fixed portions adjacent in the circumferential direction.
A suspension device characterized by: In the suspension device according to claim 4 ,
The suspension device, wherein the contractile member is an elastic member that elastically tightens the fixing portion.

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