JP2007283925A - Suspension structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily mount a suspension structure with a shock absorber and a coil spring coaxially held to a vehicle body frame. <P>SOLUTION: An outside restraining part 27 fit and located on a top end of a coil spring 2 is extended inward, and fixed to fastening means 25. A positioning member 26 is provided so as to coaxially hold the coil spring 2 and the shock absorber 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a suspension structure.

  The main role of the suspension is to ground the tire properly and to catch the movement of the tire that moves up and down following the unevenness of the road surface to reduce the vibration of the passenger compartment and the loading platform.

  FIG. 3 shows an example of a coil spring type suspension structure, in which a lower end portion of a coil spring 2 that should be positioned coaxially with respect to the shock absorber 1 is attached to a spring seat 4 that is externally fixed to the tube 3 of the shock absorber 1. The upper end portion of the coil spring 2 is brought into contact with the lower surface of the outer peripheral portion of the fixed plate 6 fixed to the piston rod 5 of the shock absorber 1 via the fastening means 25 via the bumper rubber 11. The eye 7 provided at the lower end of the tube 3 is pivotally supported by a lower arm or a lower link (not shown) that swings up and down together with the wheel, and the fixing plate 6 is fixed to a mount 9 fixed to the vehicle body frame 8. Yes.

  The fixed plate 6 has a hole 6a through which the piston rod 5 is inserted in a central portion, and a downward convex portion 12 protruding downward is formed around the hole 6a.

  Fastening means 25 for fixing the fixing plate 6 to the piston rod 5 is inserted into the piston rod 5 and placed on the boss 13 of the piston rod 5, and similarly to the piston rod 5. Screws formed on the upper end of the piston rod 5, the lower mount bush 15 to be inserted, the retainer 16 having a rising portion 16 a that fits into the hole 6 a of the fixed plate 6, the upper mount bush 17, the upper plate 18, and the piston rod 5. And a fixing nut 10 that is screwed into the portion. When the fixing nut 10 is tightened with the downward convex portion 12 of the fixing plate 6 held between the retainer 16 and the upper mounting bush 17, the fixing plate 6 is fixed to the upper mounting bush 17 and the lower mounting bush 15. The position of the fixing plate 6 and the fastening means 25 is determined by the rising portion 16a of the retainer 16 that is fixed by compression of the retainer 16 and fitted in the hole 6a, so that the shock absorber 1 and the coil spring 2 are assembled coaxially. It has become.

  A plurality of fixing bolts 19 for fixing the fixing plate 6 to the mount 9 are provided on the periphery of the fixing plate 6.

  In order to assemble the suspension structure to the mount 9 of the vehicle body frame 8, the eye 7 at the lower end of the shock absorber 1 is pivotally supported by a lower arm or a lower link (not shown) while the vehicle body frame 8 is raised. By lowering the vehicle body frame 8 in a state where the large diameter opening 20 and the fastening means 25 at the upper end of the piston rod 5 are aligned, the fastening means 25 passes through the opening 20 of the mount 9, and at the same time, A plurality of fixing bolts 19 provided in the circumferential direction of the fixing plate 6 are passed through the bolt holes 21 formed in the mount 9 so as to pass through, and nuts 22 are screwed into the fixing bolts 19 to be assembled. .

Patent Documents 1 and 2 show the general technical level related to the suspension structure. Patent Document 3 discloses a coil spring provided with seats made of sheet rubber and a rigid plate at both ends.
JP 07-117429 A JP 2001-121933 A JP 2001-248664 A

  However, as shown in FIG. 3, in the assembling method in which the fixing plate 6 is fixed to the lower surface of the mount 9 using the plurality of fixing bolts 19, the fixing bolts are fixed to the bolt holes 21 of the mount 9 when the suspension structure is assembled. The fixing plate 6 is aligned so that each of 19 is inserted, the fixing bolt 19 is inserted into the bolt hole 21, and the nut 22 is screwed and fastened to each of the inserted fixing bolts 19. In addition, since the positioning operation is not easy, the productivity is low.

  Further, Patent Document 1 and Patent Document 2 do not disclose assembly of the suspension structure to the vehicle body frame at all.

  On the other hand, Patent Document 3 shows a configuration in which seats made of sheet rubber and a rigid plate are provided at both ends of a coil spring. In the specification, upper and lower brackets include coil springs. Sheet rubbers for receiving the upper and lower ends are respectively bonded, and these sheet rubbers are formed in a ring shape. As described in the description that the spring metal seat and the rubber seat constitute the spring seat, the seat is a part of the spring seat, and the suspension structure is assembled to the vehicle body frame. Is not disclosed at all.

  The present invention has been made in view of the above-described circumstances, and provides a suspension structure capable of improving productivity by easily assembling a suspension structure in which a shock absorber and a coil spring are held coaxially to a vehicle body frame. The purpose is that.

The suspension structure of the present invention includes a coil spring that surrounds the shock absorber in the circumferential direction,
A spring seat attached to the shock absorber tube and on which the lower end of the coil spring rests;
A mount fixed to the vehicle frame and formed with a connecting hole and a convex portion;
Fastening means for fastening the piston rod of the shock absorber to the mount, comprising an upper mount bush disposed above the convex portion of the mount, and a lower mount bush disposed below the convex portion;
A suspension structure with
The coil spring and the shock absorber are coaxially held by a positioning member having an outer restricting portion fitted and mounted on the upper end portion of the coil spring and extending inward from the outer restricting portion and fixed to the fastening means. It is characterized by that.

  Further, the positioning member has a cylindrical portion that is fitted to the upper end portion of the coil spring to restrict radial movement, and a flange portion that is in contact with the upper end surface of the coil spring, and is further fitted to the convex portion of the mount. A rubber plate that forms a mating throat part is provided with a rigid plate to form an outer regulating part, the rigid plate is extended inward, and an inner edge is bonded to the lower mounting bush via a stepped part. It is characterized by being fixed.

  Further, the lower mount bush is characterized in that an opening having a smaller diameter than the outer diameter of the piston rod is inserted into the piston rod and fixed to the piston rod.

  When handling the suspension structure, the lower mount bushing is attached to the piston rod by inserting an opening having a smaller diameter than the outer diameter of the piston rod in the lower mount bush to which the positioning member is bonded and fixed. While fixing, the cylinder part of the outer side control part in a positioning member is fitted to the upper end part of a coil spring. As a result, the lower mount bush and the positioning member are temporarily fixed to the piston rod, and further, the shock absorber and the coil spring are positioned coaxially by fitting the outer regulating portion of the positioning member to the upper end of the coil spring. It is assembled in the parts set state. Thereby, the positioning member and the coil spring are prevented from floating or coming out.

  When the shock absorber piston rod is fastened and assembled to the mount, the fixing nut is tightened so that the mount is held between the positioning member and the upper mount bush. As described above, the suspension structure in which the shock absorber and the coil spring are coaxially positioned can be easily assembled to the vehicle body frame by a simple operation of tightening the fixing nut.

  At this time, the shock absorber and the coil spring are automatically positioned coaxially by the positioning member, and the mount protrusion is fitted to the throat portion of the outer regulating portion of the positioning member, whereby the suspension structure is mounted on the mount. The lateral position is determined and fastened firmly.

  According to the suspension structure of the present invention, when handling such as transportation, the lower mount bush is inserted into the piston rod through an opening having a smaller diameter than the outer diameter of the piston rod in the lower mount bush to which the positioning member is bonded and fixed. Is fixed to the piston rod, and the positioning member and the lower mounting bush are temporarily fixed to the piston rod by assembling the cylindrical portion of the outer regulating portion of the positioning member into the upper end portion of the coil spring. As a result, the shock absorber and the coil spring are assembled in a component set state that is coaxially positioned by the positioning member, and further, the positioning member and the coil spring are prevented from floating or coming out.

  When the suspension structure is fastened to the mount and assembled to the vehicle body frame, the suspension structure is attached so that the mount is held between the positioning member and the upper mount bush and the fixing nut is tightened. The coil spring is automatically positioned coaxially, and further, the convex portion of the mount is fitted to the throat portion of the outer regulating portion of the positioning member, whereby the lateral position of the suspension structure with respect to the mount is determined and tightened firmly. Therefore, a simple operation of tightening the fixing nut allows the suspension structure, in which the shock absorber and coil spring are held coaxially, to be firmly assembled to the vehicle body frame, greatly simplifying the assembly work of the suspension structure and increasing productivity. Drastically There is a top can effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show an example of the suspension structure of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the form of FIG. 1, the piston rod 5 of the shock absorber 1 is fastened to a mount 9 fixed to the vehicle body frame 8 by fastening means 25 provided on the piston rod 5.

  For this reason, the mount 9 is formed with a downward convex portion 23 having an upper receiving surface 23a on which the upper mount bush 17 of the fastening means 25 is fitted on the upper surface, and a small diameter at the central portion of the convex portion 23. The connecting hole 24 is formed.

  On the other hand, a positioning member 26 for positioning the shock absorber 1 and the coil spring 2 coaxially is provided. The positioning member 26 has an outer restricting portion 27 that is fitted and placed on the upper end portion of the coil spring 2 and restricts the position of the coil spring 2 in the radial direction, and an inner edge that extends inward from the outer restricting portion 27 has an inner edge. The fastening means 25 is fixed.

  The outer restricting portion 27 of the positioning member 26 includes a cylindrical portion 29 that can be fitted inside the upper end portion of the coil spring 2, and the downward convex portion by expanding the upper end of the cylindrical portion 29 outward. A rubber rubber G is provided with a downward throat portion 30 on which the upper surface of the coil spring 2 can be fitted. A rubber rubber G having a flange portion 31 that contacts the upper end surface of the coil spring 2 is formed on the upper surface. The rigid plate 32 is integrally arranged.

  Further, the positioning member 26 extends at the lower end position of the throat portion 30 of the outer restricting portion 27 so that the rigid plate 32 protrudes inward from the rubber rubber G, and an inner edge thereof extends from the lower mount bush 15. A fixed portion in which a stepped portion 33 is formed and extends along the lower mount bush 15, and the lower surface of the inner edge of the rigid plate 32 is bonded to the upper surface of the lower mount bush 15 with an adhesive or the like. 34.

  The lower mount bush 15 has an opening 28 having a smaller diameter than the outer diameter of the piston rod 5, and the lower mount bush 15 is fixed to the piston rod 5 by inserting the opening 28 into the piston rod 15. I can do it.

  Note that the positioning member 26 includes a cylindrical portion 29 fitted outside the upper end of the coil spring 2 in place of the cylindrical portion 29 fitted inside the upper end of the coil spring 2 as shown in the above embodiment. In the above embodiment, the mount 9 is exemplified by the case where the upward convex portion 23 having the upper receiving surface 23a to which the upper mount bush 17 is fitted is formed on the upper surface. 9, an upward convex portion having a lower receiving surface on the lower surface to which the lower mount bush 15 is fitted is formed, and an upward throat portion adapted to be fitted to the upward convex portion is formed on the positioning member 26. You may make it form.

  According to the said form, it acts as follows.

  When handling the suspension structure or the like, as shown in FIG. 2, an opening 28 having a diameter smaller than the outer diameter of the piston rod 5 is formed in the lower mount bush 15 to which the positioning member 26 is bonded and fixed. The lower mount bush 15 is fixed to the piston rod 5 by being inserted through the rod 15, and the cylindrical portion 29 of the outer regulating portion 27 in the positioning member 26 is fitted to the upper end portion of the coil spring 2. As a result, the lower mount bush 15 and the positioning member 26 are temporarily fixed to the piston rod 5, and the outer restricting portion 27 of the positioning member 26 is fitted to the upper end portion of the coil spring 2. 1 and the coil spring 2 are assembled in a component set state positioned coaxially. Thereby, the positioning member 26 and the coil spring 2 are held in a state in which they are prevented from floating or coming out.

  When the piston rod 5 of the shock absorber 1 is fastened and assembled to the mount 9 of FIG. 1, first, the body frame 8 is raised and the eye 7 at the lower end of the shock absorber 1 shown in FIG. The suspension structure is held upright by being pivotally supported by the lower arm or the lower link.

  Next, the piston rod 5 and the connecting hole 25 of the mount 9 are aligned and the vehicle body frame 8 is lowered, whereby the piston rod 5 is inserted into the connecting hole 25 of the mount 9 and the mount 9 is placed on the positioning member 26. Place. Subsequently, when the upper mount bush 17 and the upper plate 18 are inserted into the piston rod 5 and the fixing nut 10 is attached to the piston rod 5 and tightened, the mount 9 is clamped by the positioning member 26 and the upper mount bush 17. .

  At this time, the shock absorber 1 and the coil spring 2 are automatically and coaxially positioned by the positioning member 26, and the inner edge of the positioning member 26 is firmly fixed to the lower mount bush 15 by the step portion 33 and the fixing portion 34. In addition, when the downward projecting portion 23 of the mount 9 is fitted to the throat portion 30 of the outer regulating portion 27 of the positioning member 26, the lateral position of the suspension structure with respect to the mount 9 is determined and tightened firmly. Is done.

  Therefore, according to the above embodiment, the suspension structure can be firmly assembled to the vehicle body frame 8 with the shock absorber 1 and the coil spring 2 held coaxially by a simple operation of tightening the fixing nut 10. Assembling work can be greatly simplified and productivity can be greatly improved.

  Further, since the rigid plate 32 constituting the positioning member 26 is bonded and fixed to the lower mount bush 15 in advance as described above, the rigid plate 32 and the lower mount bush 15 can be handled integrally, so that the number of work steps is increased. Can be reduced.

  Further, in the above description, the case where the vehicle body frame 8 is raised and lowered when the suspension structure is assembled has been described. However, the lower arm or the lower link side to which the eye 7 is attached may be raised and lowered.

  It should be noted that the suspension structure of the present invention is not limited to the above-described embodiment, and it goes without saying that modifications can be made without departing from the scope of the present invention.

  The suspension structure of the present invention can be applied to various vehicle types.

It is a longitudinal cross-sectional view which shows an example of the suspension structure of this invention. It is sectional drawing which shows the components set state at the time of conveyance of the suspension structure of FIG. It is a longitudinal section showing an example of a coil spring type suspension.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shock absorber 2 Coil spring 4 Spring seat 5 Piston rod 8 Body frame 9 Mount 10 Fixing nut 15 Lower side mounting bush 17 Upper side mounting bush 23 Convex part 24 Connection hole 25 Fastening means 26 Positioning member 27 Outer restricting part 28 Opening 29 Cylindrical part 30 Throat part 31 Flange part 32 Rigid plate 33 Step part 34 Fixed part G Rubber rubber

Claims (3)

A coil spring that surrounds the shock absorber in the circumferential direction;
A spring seat attached to the shock absorber tube and on which the lower end of the coil spring rests;
A mount fixed to the vehicle frame and formed with a connecting hole and a convex portion;
Fastening means for fastening the piston rod of the shock absorber to the mount, comprising an upper mount bush disposed above the convex portion of the mount, and a lower mount bush disposed below the convex portion;
A suspension structure with
The coil spring and the shock absorber are coaxially held by a positioning member having an outer restricting portion fitted and mounted on the upper end portion of the coil spring and extending inward from the outer restricting portion and fixed to the fastening means. Suspension structure characterized by that.   The positioning member includes a cylindrical portion that is fitted to the upper end portion of the coil spring to restrict radial movement, and a flange portion that is in contact with the upper end surface of the coil spring, and is further fitted to the convex portion of the mount. A rubber plate formed with a throat portion is provided with a rigid plate to form an outer regulating portion, the rigid plate is extended inward, and an inner edge is bonded and fixed to the lower mount bush via a stepped portion. The suspension structure according to claim 1.   3. The suspension structure according to claim 1, wherein the lower mount bush has an opening having a smaller diameter than the outer diameter of the piston rod inserted into the piston rod and fixed to the piston rod. 4.

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