JP3130322U - Maintenance stand for rear wheels of motorcycles - Google Patents

Abstract

In a rear wheel maintenance stand, it is possible to speed up the lift-up with a simple configuration, to reduce the size of the stand, to prevent the vehicle body from being damaged, and to stabilize the lift-up.
In a rear wheel maintenance stand 30 having a pair of L-shaped rods 31 and a connecting portion 32, a rear wheel axle is provided at the left and right rear ends of a swing arm 11 so as to be rotatable. The left and right chain adjusters 20 that eccentrically support the left and right chain adjusters 20 are formed with holes for rotating the chain adjusters 20, and the left and right lift rods 40 are attached to the rotating operation holes of the left and right chain adjusters 20. The part 41 is detachable, and the receiving parts 33 at the tips of the L-shaped rods 31 can be engaged with the engaging parts of the lift rods 40 attached to the rotation operation holes 22.
[Selection] Figure 1

Description

  The present invention relates to a motorcycle rear wheel maintenance stand suitable for use in racing vehicles and the like.

  In motorcycles, a rear wheel maintenance stand is used as described in Patent Document 1 for lifting the rear wheel from the ground for tire replacement, rear wheel axle bearing inspection, chain replacement, brake carrier pad replacement, and the like. It has been.

The rear wheel maintenance stand described in Patent Literature 1 has a pair of L-shaped bars and a connecting portion that connects the base ends of both L-shaped bars, and a support provided at the tip of both L-shaped bars is attached to the body of the vehicle body. Engaging the side and allowing the receiver to turn to the upper lift position with the intermediate bent part of both L-shaped bars as a fulcrum. In particular, it is assumed that each of the L-shaped bar ends has a U-shaped receiving portion that opens upward, and the lower edge of the middle portion in the longitudinal direction along the front-rear direction of the swing arm is left and right by the U-shaped receiving portion. I try to pinch it quickly from both sides. A maintenance stand is used, with the intermediate bent part of both L-shaped bars as a fulcrum and the receiving part of the receiving tool as an action point.
JP 7-291161 A

The rear wheel maintenance stand described in Patent Document 1 has the following problems.
(a) A support provided at the tip of both L-shaped rods of the maintenance stand is engaged with the lower edge of the middle portion of the swing arm in the longitudinal direction, and both L-shaped rods arranged at the rear of the rear wheel The length from the joint part of the base end to the receiving member is increased. Accordingly, the maintenance stand becomes longer.

  (b) The U-shaped receiving part of the receiving device is designed to directly squeeze the lower edge of the swing arm in the longitudinal direction from both the left and right sides and cause damage such as scratches on the surface of the swing arm. There is.

  (c) The U-shaped receiving part of the receiver pinches the lower edge of the middle part of the swing arm in the longitudinal direction from both the left and right sides, and in the lifted state of the rear wheel, On the other hand, the lower edge of the swing arm may slide along the front-rear direction, which may result in lack of stability.

  An object of the present invention is to speed up the lift-up, reduce the size of the stand, not to damage the vehicle body, and stabilize the lift-up with a simple configuration in the rear wheel maintenance stand. .

  The invention of claim 1 has a pair of L-shaped rods and a connecting portion that connects the base ends of both L-shaped rods, and engages a receiving device provided at the tip of both L-shaped rods on the vehicle body side, In a maintenance stand for a rear wheel of a motorcycle that allows the receiver to be turned to an upward lift position with an intermediate bent portion of both L-shaped bars as a fulcrum, the rear wheel is provided rotatably at the left and right rear ends of the swing arm. The side of the left and right chain adjusters that support the axle eccentrically are opened with holes for turning the chain adjusters, and the mounting parts for the left and right lift rods can be attached to and detached from the turning holes for the left and right chain adjusters. In addition, each receiving tool at the tip of both L-shaped rods can be engaged with the engaging portion of each lift rod attached to the hole for rotation operation.

  According to a second aspect of the present invention, in addition to the first aspect of the present invention, the receiving device further includes a bifurcated receiving portion that is bifurcated forward and backward, and the bifurcated receiving portion can be engaged with the engaging portion of the lift rod. It is what I did.

  According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, the rotation hole of the chain adjuster is a square hole, and the attachment portion of the lift rod is a square bar.

(Claim 1)
(a) Attach the left and right lifting rod mounting parts to the rotation operation holes of the left and right chain adjusters, and engage the receiving parts at the tips of both L-shaped rods of the maintenance stand with the engaging parts of the lifting rods. The rear wheels can be lifted up from the ground by rotating each receiving member to the upper lift position with the intermediate bent portion of both L-shaped bars as a fulcrum. By attaching the lift rod using the rotation hole of the chain adjuster, the configuration can be simplified, and the lift rod can be easily attached and the lift-up can be speeded up.

  (b) The support provided at the tip of both L-shaped rods of the maintenance stand engages with the engaging portion of the lift rod attached to the rotation hole of the chain adjuster provided at the rear end of the swing arm. To do. Therefore, the length from the joint portion of the base ends of both L-shaped bars arranged behind the rear wheel to the receiving member is shortened, and the maintenance stand can be miniaturized.

  (c) The maintenance stand holder is engaged with the engaging portion of the lift rod attached to the rotation hole of the chain adjuster provided at the rear end of the swing arm, and is directly on the swing arm. Since it does not contact, the surface of the swing arm is not damaged by scratches.

(Claim 2)
(d) The maintenance stand receiver has a bifurcated receiving portion that is bifurcated forward and backward, and the bifurcated receiving portion can be engaged with the engaging portion of the lift rod. Accordingly, the bifurcated receiving portion of the receiving device sandwiches the engaging portion of the lifting rod attached to the rotation hole of the chain adjuster from both the front and rear sides, and the rear wheel is lifted up and swings with respect to the receiving device. The arm or the like does not move unexpectedly in the front-rear direction, and the lift-up can be stabilized.

(Claim 3)
(e) The lifting rod can be mounted by simply fitting the mounting portion of the lifting rod that engages with the holder of the maintenance stand into the rotation hole of the square hole of the chain adjuster, thereby speeding up the lift. be able to.

  FIG. 1 is a perspective view showing a motorcycle and a rear wheel maintenance stand, FIG. 2 is a perspective view showing a swing arm and a chain adjuster, FIG. 3 is a perspective view showing a lift rod, and FIG. 4 is a use of a rear wheel maintenance stand. It is a schematic diagram which shows a procedure.

  As shown in FIGS. 1 and 2, the motorcycle 10 supports the front end of a cantilever swing arm 11 through a pivot shaft (not shown) at the left and right rear ends of a body frame (not shown) in a swingable manner. . An axle holder portion 12 is provided at the left and right rear ends of the swing arm 11, and circular left and right chain adjusters 20 are rotatably supported in round holes of the left and right axle holder portions 12. The rear portions of the left and right axle holder parts 12 are split into upper and lower split parts 13, and the chain adjuster 20 is fixed in the axle holder part 12 by tightening the split part 13 with bolts 14, and is tightened with bolts 14. By loosening the portion 13, the chain adjuster 20 is rotatable within the axle holder portion 12.

  The left and right chain adjusters 20 include an axle support portion 21 that supports the axle 16 of the rear wheel 15, the center of the axle support portion 21 is arranged eccentrically with respect to the center of the chain adjuster 20, and the axle 16 is rotated by the chain adjuster 20. Eccentric support for the center. A driven sprocket is attached to the axle 16, and a chain is wound between the drive sprockets of the engine so that the rear wheel 15 can be driven by the chain.

  The left and right chain adjusters 20 have a rotation operation hole 22 that allows a tool such as a rotation operation wrench to be attached and detached, on the outward side surface. The center of the rotation operation hole 22 is eccentrically arranged with respect to the center of the chain adjuster 20, and the user can rotate the chain adjuster 20 via a wrench. In this embodiment, the rotation operation hole 22 is a hexagonal hole, and a hexagon wrench can be inserted into and inserted into the hole 22. When the tension of the chain wound around the driven sprocket of the axle 16 is loosened, when the chain adjuster 20 is rotated in one direction, the axle support portion 21 is eccentrically rotated and the center thereof moves rearward of the vehicle body. The axle length of the rear wheel becomes longer, and the chain tension is adjusted to an appropriate length.

  The motorcycle 10 includes a rear wheel maintenance stand 30 for lifting the rear wheel 15 from the ground for vehicle repairs such as tire replacement of the rear wheel 15, inspection of the bearings of the axle 16, chain replacement, brake caliper pad replacement, and the like. Provided incidentally. As shown in FIG. 1, the maintenance stand 30 has a pair of L-shaped rods 31 and a connecting portion that connects the base ends of both L-shaped rods 31. The lower part of the vehicle body 10A is engaged with the vehicle body 10A side as described later, and the receiving member 33 can be rotated to the upper lift position with a fulcrum roller 34A provided on the intermediate bent part 34 of both L-shaped bars as a fulcrum. To.

  The maintenance stand 30 according to the present embodiment further includes a U-shaped arm portion 35 that engages with the L-shaped bar 31 and the connecting portion 32 and expands the length of the armpit, and the distal ends of the arm portions 35 are arranged at both ends. An intermediate part of the arm part 35 is connected to the connecting part 32 to the L-shaped bar 31. The maintenance stand 30 is rotated around the fulcrum roller 34A (fulcrum) by the lever principle corresponding to the pressing force applied to the proximal end operation part 35A (force point) of the arm 35, and engaged with the vehicle body 10A side. A receiving tool 33 (operation point) is made rotatable to the upper lift position. At this time, the L-shaped rod 31, the connecting portion 32, and the like of the maintenance stand 30 have shapes and dimensions that prevent the connecting portion 32 crossing the rear of the rear wheel 15 from interfering with the rear wheel 15.

  However, when the maintenance stand 30 is used, the attachment rod 41 of the left and right lift rods 40 is detachably attached to the rotation operation hole 22 of the left and right chain adjusters 20, and the lift rod is attached to the rotation operation hole 22. The respective receiving members 33 at the tips of both L-shaped bars 31 can be engaged with the 40 engaging portions 42. As shown in FIG. 3, the lift rod 40 of the present embodiment is formed by coaxially assembling and integrating a mounting portion 41 made of stainless steel or the like and an engagement portion 42 made of aluminum, and the mounting portion 41 has a rotation operation hole. The engaging part 42 includes a small diameter part 42C between the boss part 42A and the flange part 42B to which the receiving tool 33 is engaged as will be described later.

  The support 33 of the maintenance stand 30 includes a square bar mounting bar 33A that is inserted into a lateral square hole of a mounting stay 31A attached to the tip of both L-shaped bars 31 and fixed with a set screw, and a mounting bar. And a plate-like bifurcated receiving portion 33B fixed to the distal end surface of 33A. The bifurcated receiving portion 33B is bifurcated forward and backward. The receiving tool 33 engages the engaging portion 42 of the lifting rod 40 with the small-diameter portion 42C sandwiched between the boss portion 42A and the flange portion 42B from below and front and rear, Engage stably from both the front and rear sides and the left and right sides.

Therefore, the maintenance stand 30 is used as follows.
(1) The attachment portion 41 of the lift rod 40 is fitted into the rotation operation hole 22 of the chain adjuster 20 fixed in the left and right axle holder portions 12 of the swing arm 11 (FIG. 4A, ( B)).

  (2) The bifurcated receiving portion 33B of the receiving member 33 provided at the tip of both L-shaped rods 31 of the maintenance stand 30 is engaged with the engaging portion 42 of the lifting rod 40 described in (1) from below the rear portion of the vehicle body 10A. (FIG. 4C).

  (3) By applying a pressing force to the operation portion 35A of the arm portion 35 of the maintenance stand 30, the maintenance stand 30 is rotated around the fulcrum roller 34A, and the receiving member 33 is rotated from the initial position to the upper lift position. Then, the rear wheel 15 is lifted up from the ground and the tire is exchanged.

  (4) After the tire replacement, etc., the operation part 35A of the arm part 35 of the maintenance stand 30 is lifted to return the receiving tool 33 to the initial position and install the rear wheel 15 again, contrary to the above (3). Let

According to the present embodiment, the following operational effects can be obtained.
(a) The attachment portions 41 of the left and right lifting rods 40 are attached to the rotation operation holes 22 of the left and right chain adjusters 20, and the receiving tools 33 at the tips of both L-shaped rods 31 of the maintenance stand 30 are attached to the lifting rod 40. The rear wheels 15 are lifted from the ground by engaging the engaging portions 42 of the two L-shaped rods 31 and rotating the receiving tools 33 to the upper lift position with the intermediate bent portions 34 (fulcrum rollers 34A) of the L-shaped rods 31 as fulcrums. Can be up. By attaching the lift rod 40 using the rotation operation hole 22 of the chain adjuster 20, the configuration can be simplified, and the lift rod 40 can be easily attached and the lift-up can be speeded up.

  (b) The lift rod 40 attached to the rotation operation hole 22 of the chain adjuster 20 provided at the front end of both L-shaped bars 31 of the maintenance stand 30 is provided at the rear end of the swing arm 11. The engaging portion 42 is engaged. Therefore, the length from the joint part 32 of the base end of both L-shaped stick | rods 31 arrange | positioned behind the rear-wheel 15 to the said receiving tool 33 becomes short, and the maintenance stand 30 can be reduced in size.

  (c) The holder 33 of the maintenance stand 30 is engaged with the engaging portion 42 of the lift rod 40 attached to the rotation operation hole 22 of the chain adjuster 20 provided at the rear end of the swing arm 11. Since the swing arm 11 is not in direct contact with the swing arm 11, the surface of the swing arm 11 is not damaged such as a scratch.

  (d) The receiving tool 33 of the maintenance stand 30 includes a bifurcated receiving portion 33B that is bifurcated forward and backward, and the engaging portion 42 of the lifting rod 40 can be engaged with the bifurcated receiving portion 33B. Accordingly, the bifurcated receiving portion 33B of the receiving tool 33 sandwiches the engaging portion 42 of the lifting rod 40 attached to the rotation operation hole 22 of the chain adjuster 20 from both the front and rear sides, and the rear wheel 15 is lifted up. Thus, the swing arm 11 or the like does not move unexpectedly in the front-rear direction with respect to the receiving member 33, and the lift-up can be stabilized.

  (e) The mounting portion 41 of the square rod of the lift rod 40 with which the support 33 of the maintenance stand 30 engages can be simply fitted and attached to the rotation operation hole 22 of the square hole of the chain adjuster 20. The speed of up can be increased.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the present invention.

FIG. 1 is a perspective view showing a motorcycle and a rear wheel maintenance stand. FIG. 2 is a perspective view showing the swing arm and the chain adjuster. FIG. 3 is a perspective view showing a lift rod. FIG. 4 is a schematic diagram showing a procedure for using the rear wheel maintenance stand.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Motorcycle 11 Swing arm 15 Rear wheel 16 Axle 20 Chain adjuster 22 Rotating operation hole 30 Maintenance stand 31 L-shaped bar 32 Connecting part 33 Receiving tool 33B Two-forked receiving part 34 Intermediate bending part 40 Lifting rod 41 Mounting part 42 Engagement part

Claims (3)

It has a pair of L-shaped bars and a connecting part that connects the base ends of both L-shaped bars, engages a receiving device provided at the tip of both L-shaped bars on the vehicle body side, and makes an intermediate bend between both L-shaped bars. In the maintenance stand for the rear wheel of the motorcycle that enables the receiving member to turn to the upper lift position with the part as a fulcrum,
The left and right chain adjusters are provided at the left and right rear ends of the swing arm so as to be pivotable and support the rear wheel axle eccentrically.
The left and right lift rod mounting portions are detachably attached to the rotation operation holes of the left and right chain adjusters, and the engagement portions of the lift rods attached to the rotation operation holes are connected to the end portions of both L-shaped rods. A maintenance stand for a rear wheel of a motorcycle, wherein a receiving member is engageable.   2. The maintenance stand for a rear wheel of a motorcycle according to claim 1, wherein the receiving device includes a bifurcated receiving portion that is bifurcated forward and backward, and the bifurcated receiving portion can be engaged with an engaging portion of a lift rod.   The maintenance stand for the rear wheel of the motorcycle according to claim 1 or 2, wherein the rotation hole of the chain adjuster is a square hole, and the attachment portion of the lift rod is a square bar.

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