JP2006007954A - Suspension device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a tool simple and inexpensive by constituting the tool for fixing and holding a suspension coil spring in a prescribed compressed state, of a screw shaft and a nut, and to facilitate installation and removal thereof. <P>SOLUTION: The suspension coil spring 12 arranged in parallel with a shock absorber abuts on a suspension lower arm 13 at a lower end, and on a spring support 15 installed in a frame 14 at an upper end. The spring support 15 is provided with a through hole 15b in which a bar-shaped locking part 31a formed on a head part of the screw shaft 31 can be inserted, and a support part 15c for receiving the bar-shaped locking part 31a in a rotation regulating state. The suspension lower arm 13 is provided with a through hole 13a in which the bar-shaped locking part 31a of the screw shaft 31 can be inserted, and a seat part 13b for receiving the nut 32 to be threadedly engaged with a male screw part 31b of the screw shaft 31 in a rotatable state. The tool 30 for fixing and holding the suspension coil spring 12 in the prescribed compressed state is constituted of the screw shaft 31 and the nut 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle suspension device, and more particularly to a vehicle suspension device in which a suspension coil spring is arranged in parallel to a shock absorber.

In this type of vehicle suspension device, the suspension coil spring is used, for example, as a shock absorber when the vehicle suspension device is assembled to the frame (vehicle body) or in a state where the vehicle suspension device is assembled to the vehicle body. May be fixedly held in a predetermined compressed state when the battery is exchanged, and a jig for that purpose is disclosed, for example, in Patent Document 1 below.
JP 2002-21458 A

  The jig shown in Patent Document 1 described above includes a pedestal that supports a suspension lower arm (described as a lower control arm) from below, and a long bolt that connects the pedestal to a frame. The base is provided with an insertion hole (described as a through hole) through which the shaft portion of the long shaft bolt passes, and a seat portion in which the hexagonal head portion of the long shaft bolt contacts and engages via a washer, A pair of positioning pins that stand so as to sandwich the suspension lower arm from one side to the other at one side of the insertion hole and a protruding receiving portion that can come into contact with the height of the inclined lower surface of the suspension lower arm on the other side of the insertion hole. It is attached.

  By the way, in the jig shown in Patent Document 1 described above, when a long-axis bolt is connected to a frame, an existing welding nut that is pre-welded to the frame is used, but when the jig is not mounted. The connecting bolt for fixing the upper sheet of the suspension coil spring to the frame is screwed to the existing welding nut. For this reason, when mounting the jig, it is necessary to remove the connecting bolt before the mounting work, and when removing the jig, it is necessary to attach the connecting bolt after the removing work. , Complicated work is required.

  The troublesome work described above can be eliminated by previously welding a nut for the long shaft bolt to the frame separately from the existing welding nut. In this case, the nut that is pre-welded to the frame is also a component of the jig, and the jig includes a long-axis bolt, a cradle, a pair of positioning pins, a protruding receiving portion, a nut, and the like. However, there is a risk that the number of components is high due to the large number of components.

  The present invention has been made to solve the above problems, and a spring support in which a suspension coil spring arranged in parallel with a shock absorber contacts a suspension lower arm at a lower end and is assembled to a frame at an upper end. In the vehicle suspension device in contact with the spring support, an insertion hole through which the radially extending rod-shaped locking portion formed in the head of the screw shaft can be inserted into the spring support, and the rod-shaped locking portion in a rotation-restricted state. An acceptable support portion is provided, and the suspension lower arm is rotated with an insertion hole through which the rod-like locking portion of the screw shaft can be inserted, and a nut screwed into a male screw portion formed on the leg portion of the screw shaft. A seat that can be received in a possible state is provided, and the screw shaft is inserted into the suspension coil spring, the suspension lower arm, and the spring support. It is characterized in that the capacity.

  In this case, it is preferable that the seat portion of the suspension lower arm and the nut are connected in a joint shape. The rod-shaped locking portion may be a T-shape extending on both sides in the radial direction or an L-shape extending on one side in the radial direction.

  In the suspension system for a vehicle according to the present invention, in a state in which the suspension coil spring is compressed between the suspension lower arm and the spring support, the rod-shaped latching portion of the screw shaft is attached to the suspension lower arm, the suspension coil spring, and the spring support. A first mounting step for inserting from the lower arm toward the spring support, and a second mounting for rotating the screw shaft by a predetermined amount and aligning the rod-shaped locking portion of the screw shaft with the support portion of the spring support after the first mounting step. After the step and the second mounting step, the suspension coil spring is fixed in a predetermined compressed state with a jig composed of the screw shaft and the nut by executing a third mounting step in which the nut is screwed onto the male screw portion of the screw shaft. Can be held.

  For this reason, when the vehicle suspension device is assembled to the frame (vehicle body), or when the vehicle suspension device is assembled to the vehicle body, for example, when the shock absorber is replaced, the suspension coil spring is The suspension lower arm does not tilt unnecessarily because it does not extend unnecessarily. Therefore, it is possible to easily perform, for example, an operation of assembling the vehicle suspension device to the frame (vehicle body), or an operation of replacing the shock absorber, for example, in a state where the vehicle suspension device is assembled to the vehicle body. .

  Further, in the vehicle suspension device according to the present invention, the first removal step of removing the nut from the male thread portion of the screw shaft, and after the first removal step, the screw shaft is rotated by a predetermined amount so that the rod-shaped engagement of the screw shaft. By performing a second removal step of matching the stop portion and the insertion hole of the spring support, and a third removal step of extracting the screw shaft from the spring support, the suspension coil spring and the suspension lower arm after the second removal step. The compression and fixing state of the suspension coil spring by the jig composed of the screw shaft and the nut can be solved.

  By the way, in the vehicle suspension apparatus according to the present invention, when attaching and removing the jig composed of the screw shaft and the nut, no work other than attaching and removing the screw shaft and the nut is required. And can be easily removed. Moreover, since the component parts of the jig are substantially two parts of the screw shaft and the nut, the jig can be configured simply and inexpensively.

  In addition, when the suspension lower arm seat and the nut are configured to be articulated when the present invention is implemented, the nut can smoothly tilt with respect to the suspension lower arm seat. 3. When performing the mounting process (the process of screwing the nut into the male screw part of the screw shaft) or the first removing process (the process of removing the nut from the male screw part of the screw shaft), the movement of the nut is smoothed and the workability is improved. It is possible.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a vehicle suspension device according to the present invention. In this suspension device, a suspension coil spring 12 arranged in parallel to a shock absorber 11 has a suspension lower arm 13 at the lower end. And a spring support 15 assembled to the frame 14 at the upper end.

  As shown in FIG. 1, the shock absorber 11 is interposed between the suspension lower arm 16 and the frame 14 which are provided separately from the suspension lower arm 13, so as to be detachable and replaceable. The suspension coil spring 12 is interposed between the suspension lower arm 13 and the frame 14, and the outer periphery is covered and protected by a cylindrical cover 17 as shown in FIG.

  As shown in FIG. 1, the suspension lower arms 13 and 16 are swingably connected to the frame 14 at the base end, and are rotatably connected to the axle carrier 18 at the tip end. The axle carrier 18 is supported by both suspension lower arms 13 and 16 and a suspension upper arm 19. The suspension upper arm 19 is swingably connected to the frame 14 at the base end, and is rotatably connected to the axle carrier 18 at the tip end.

  The spring support 15 is assembled to the frame 14 by fixing means (not shown), and a circular recess 15a is formed at the center thereof. Further, as shown in FIG. 2, a spring bound stopper 21 that is formed in a truncated cone shape and is accommodated in the suspension coil spring 12 is integrally assembled below the spring support 15.

  By the way, in this embodiment, when the vehicle suspension device is assembled to the frame 14, or when the vehicle suspension device is assembled to the frame 14, for example, when the shock absorber 11 is replaced. As shown in FIG. 2, a jig 30 for fixing and holding the suspension coil spring 12 in a predetermined compressed state is constituted by a screw shaft 31 and a nut 32 (see FIGS. 2 and 3).

  Further, in order to enable the jig 30 to be attached / detached, as shown in FIGS. 2 and 4, a rod-like latch extending in the radial direction formed in the head of the screw shaft 31 in the recess 15 a of the spring support 15. An I-shaped insertion hole 15b through which the portion 31a can be inserted is provided, and an I-shaped support recess 15c capable of receiving the rod-shaped locking portion 31a in a rotation-restricted state is provided.

  In addition, the suspension lower arm 13 and the spring bound stopper 21 are provided with I-shaped insertion holes 13a (see FIGS. 2 and 5) and 21a (see FIG. 2) through which the rod-shaped locking portions 31a of the screw shaft 31 can be inserted. The suspension lower arm 13 is provided with a seat portion 13b (see FIGS. 2 and 5) capable of receiving a nut 32 screwed into a male screw portion 31b formed on a leg portion of the screw shaft 31 in a rotatable state.

  Thereby, in this embodiment, the screw shaft 31 can be inserted through the suspension lower arm 13, the suspension coil spring 12, the spring bound stopper 21, and the spring support 15. Further, in this embodiment, the seat portion 13b provided on the suspension lower arm 13 is formed in a hemispherical shape, and the upper portion 32a of the nut 32 that engages with the seat portion 13b is formed in a hemispherical shape. 13 seat portions 13b and nuts 32 are connected in a joint shape.

  In this embodiment configured as described above, the suspension coil spring 12 is compressed between the suspension lower arm 13 and the spring support 15, and the suspension lower arm 13, the suspension coil spring 12 and the spring support 15 are screwed to the screw shaft. The rod-shaped engaging portion 31a of the thread 31 is inserted through the suspension lower arm 13 toward the spring support 15, and after the first mounting step, the screw shaft 31 is rotated by a predetermined amount to thereby engage the rod-shaped engagement of the screw shaft 31. A second mounting step for matching the stopper 31a with the I-shaped support recess 15c of the spring support 15 and a third mounting step for screwing the nut 32 to the male threaded portion 31b of the screw shaft 31 are performed after the second mounting step. As a result, the suspension coil spring is supported by the jig 30 comprising the screw shaft 31 and the nut 32. It is possible to fix and hold the grayed 12 in a predetermined compressed state.

  For this reason, when the vehicle suspension device is assembled to the frame 14 or when the vehicle suspension device is assembled to the frame 14, for example, when the shock absorber 11 is replaced, the suspension coil spring 12. Does not extend unnecessarily, and the suspension lower arm 13 does not tilt unnecessarily. Therefore, it is possible to easily perform the work of assembling the vehicle suspension device to the frame 14 or the operation of replacing the shock absorber 11, for example, in a state where the vehicle suspension device is assembled to the frame 14. .

  Moreover, in this embodiment, the screw shaft 31 is rotated by a predetermined amount after the first removal step of removing the nut 32 from the male screw portion 31b of the screw shaft 31, and the rod shape of the screw shaft 31 is removed. A second removal step for matching the locking portion 31a with the I-shaped insertion hole 15b of the spring support 15, and after this second removal step, the screw shaft 31 is moved from the spring support 15, the suspension coil spring 12 and the suspension lower arm 13. By executing the third removal step of extracting, the compression coiled state of the suspension coil spring 12 by the jig 30 including the screw shaft 31 and the nut 32 can be released.

  By the way, in this embodiment, when attaching and removing the jig 30 including the screw shaft 31 and the nut 32, no work other than attaching and removing the screw shaft 31 and the nut 32 is required. Can be easily mounted and removed. Moreover, since the component parts of the jig 30 are substantially two parts of the screw shaft 31 and the nut 32, the jig 30 can be configured simply and inexpensively.

  Further, in this embodiment, the seat portion 13b of the suspension lower arm 13 and the nut 32 are articulated, and the nut 32 can be smoothly tilted with respect to the seat portion 13b of the suspension lower arm 13. 3 When performing the mounting step (step of screwing the nut 32 into the male screw portion 31b of the screw shaft 31) or the first removal step (step of removing the nut 32 from the male screw portion 31b of the screw shaft 31), the movement of the nut 32 is changed. It is possible to improve workability smoothly.

  In the above embodiment, the present invention is implemented in the embodiment in which the spring bound stopper 21 is integrally assembled to the lower side of the spring support 15, but the embodiment in which the spring bound stopper is not assembled to the lower side of the spring support. In addition, the present invention can be implemented in the same manner as the above embodiment. Moreover, in the said embodiment, although the rod-shaped latching | locking part 31a formed in the head of the screw shaft 31 demonstrated T embodiment, this rod-shaped latching | locking part 31a was shown in FIG. Even if it is formed in an L-shape, it is also possible to carry out.

  In the above embodiment, the shock absorber 11 is interposed between the frame 14 and the suspension lower arm 16, and the suspension coil spring 12 is interposed between the frame 14 and the suspension lower arm 13, that is, the shock absorber 11 Although the invention has been implemented in an embodiment in which the suspension coil spring 12 is assembled to a separate suspension lower arm, the invention is similarly implemented in an embodiment in which the shock absorber and the suspension coil spring are assembled to the same suspension lower arm. Is possible.

It is a front view showing one embodiment of a suspension system for vehicles by the present invention. It is a front view which shows roughly the relationship between the suspension coil spring shown in FIG. 1, a suspension lower arm, a frame, a spring support, and a spring bound stopper, and the relationship of a jig | tool. It is a disassembled perspective view of the jig | tool which consists of a screw shaft and a nut shown in FIG. It is a perspective view which shows the relationship between the spring support shown in FIG. 2, and the rod-shaped latching | locking part of a screw shaft. FIG. 3 is a longitudinal sectional view showing a relationship among a suspension lower arm, a screw shaft, and a nut shown in FIG. 2. It is a perspective view which shows the deformation | transformation embodiment of the rod-shaped latching | locking part formed in the head of a screw shaft.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Shock absorber, 12 ... Suspension coil spring, 13 ... Suspension lower arm, 13a ... I-shaped insertion hole, 13b ... Seat part, 14 ... Frame, 15 ... Spring support, 15a ... Circular recessed part, 15b ... I-shaped insertion hole , 15c ... I-shaped support recess, 21 ... Spring bound stopper, 21a ... I-shaped insertion hole, 30 ... Jig, 31 ... Screw shaft, 31a ... Bar-shaped locking part, 31b ... Male screw part, 32 ... Nut

Claims (2)

  A suspension system for a vehicle in which a suspension coil spring arranged in parallel with a shock absorber is in contact with a suspension lower arm at a lower end and a spring support assembled to a frame at an upper end. An insertion hole through which a radially extending rod-shaped locking portion formed in the head portion of the shaft can be inserted, and a support portion that can receive this rod-shaped locking portion in a rotation-restricted state are provided, and the screw shaft is provided on the suspension lower arm The suspension coil spring is provided with an insertion hole through which the rod-like locking portion can be inserted, and a seat portion that can receive a nut screwed into a male screw portion formed on a leg portion of the screw shaft in a rotatable state. The suspension system for a vehicle, wherein the screw shaft can be inserted into the suspension lower arm and the spring support. The vehicle suspension device according to claim 1, wherein the seat portion of the suspension lower arm and the nut are connected in a joint shape.

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