JP2007100794A - Bolt fall-off prevention tool for drive shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ideal tool for fall-off prevention for a bolt fastened to a wheel part of a drive shaft during disassembling work of the drive shaft of a rear wheel of an automobile, especially of a large-size automobile. <P>SOLUTION: The fall-off prevention tool 1 for a bolt of a drive shaft is formed, having a circular check plate 2 capable of covering a top part of the drive shaft, a circular ring-shaped magnet 3 fixed to one face of the check plate 2 allowed to be magnetized to the top part of the drive shaft, a protruded part (screw) 5 protruding from the check plate 2 to the central part of the magnet 3, and a handle part 4 protrudingly provided at the central part of the other face of the check plate 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bolt retaining member for fastening a drive shaft to a wheel portion in an automobile, particularly a disassembly work of a drive shaft of a rear wheel of a large vehicle.

  A longitudinal sectional view of an example of a rear wheel of a large vehicle is shown in FIG.

  In FIG. 5, A is a drive shaft, B is a drive case, and C is a wheel.

  A wheel C is rotatably mounted on the drive case B via a hub D, the drive shaft A is fastened to the wheel C by bolts E, and the drive shaft A rotates the wheel C. It is structured to drive.

  When disassembling the rear wheel of a large vehicle in an automobile maintenance shop or the like, the bolt E is removed from the drive shaft A, and then the drive shaft A is removed.

  Conventionally, the bolt E is removed from the drive shaft A and stored during disassembly work.

  The number of these bolts E is 6 to 10 for each drive shaft.

  When the maintenance work was completed and the drive shaft A was assembled in the reassembly work of the rear wheel part, the assembly was carried out while attaching the removed bolts E one by one.

  However, this has a problem that workability is poor and time-consuming.

  Therefore, research was conducted on a bolt retaining device that prevents the connection bolt E from being detached from the drive shaft A even after the connection between the drive shaft A and the wheel C (or the hub D) is released during the disassembly work.

For example, there is Patent Document 1 as a bolt stopper.
JP 2000-192935 A

  The bolt retainer described in Patent Document 1 is always used by being attached to a bolt, and thus has a problem of increasing the cost of the vehicle.

  In addition, there is a problem for the vehicle maintenance company that a necessary bolt stopper is an external type that can be used as a tool.

  An object of the present invention is to solve the above-described problems and to provide a drive shaft bolt stopper that can be used as a tool without increasing the cost of a vehicle.

  In order to achieve the above-mentioned object, the present invention is a tool used for a drive shaft of a type in which the top of the drive shaft is fastened to a wheel portion of an automobile with a plurality of bolts, and covers the top of the drive shaft. A stop plate that is capable of preventing the bolts from slipping off, a magnet fixed to one surface of the stop plate so as to be magnetically attachable to the top of the drive shaft, and a projecting projection on the other surface of the stop plate And a handle portion.

  According to the present invention, at the time of disassembling the drive shaft, the drive shaft can be removed while the bolts for fastening with the wheel are attached to the drive shaft, and the storage is convenient. Since the bolt is attached to the drive shaft, it has the effect of being able to work easily.

  An example of the best mode for carrying out the present invention will be described.

  An embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a longitudinal sectional view of a retainer 1 for a bolt of a drive shaft according to the present invention, and FIG. 2 is a plan view thereof.

  The stopper 1 includes a stop plate 2, an annular magnet 3 fixed to one surface of the stop plate 2, and a handle portion 4 projecting from the center of the other surface of the stop plate 2. Have.

  The stop plate 2 is formed of a flexible circular transparent resin plate, and has an outer diameter larger than the top (flange) F of the drive shaft A of the rear wheel of the large vehicle. .

  The magnet 3 has an outer diameter capable of contacting a bulging portion F1 provided at the top F of the drive shaft A, and is fixed to the central portion of one surface of the stop plate 2. It is fixed in the metal tray 3a.

  Reference numeral 5 denotes a projecting portion made of a screw having a hemispherical head, and the screw 5 fastens the receiving tray 3a to the handle portion 4 with the stop plate 2 interposed therebetween.

  The head of the screw 5 is formed so as to be able to fit into a recess (center hole) F2 at the center of the top F of the drive shaft A, and is fixed at a position protruding slightly from the magnet 3.

  The handle portion 4 has a cylindrical shape like a pan lid handle.

  Next, a method of using the bolt retainer 1 of the present invention will be described.

  When disassembling the rear wheel of a large vehicle, the bolt E that fastens the drive shaft A and the wheel is loosened to separate them, and then the bolt E is connected to the bolt of the drive shaft A as shown in FIG. In the state of being fastened to the hole, the bolt retainer 1 is locked onto the top F of the drive shaft A.

  That is, the bolt retainer 1 is fitted into the head of the screw 5 at the center and the recess F2 at the center of the top F of the drive shaft A, and the magnet 3 is bulged out of the drive shaft A. F1 is magnetized and locked to the crown F.

  At this time, the bolt E is prevented from coming out of the bolt hole of the top F of the drive shaft A due to the interference of the stop plate 2 of the stopper 1 and is held by the drive shaft A.

  Since the stop plate 2 is made of a transparent resin plate, it is easy to attach the bolt stopper 1 to the top F of the drive shaft A, and between the drive shaft A and the wheel. Even during fastening, it is easy to insert the bolt E into the bolt hole of the wheel.

  Furthermore, since the stop plate 2 is made of resin and lightweight, there is no risk of injury to the operator during work.

  FIG. 4 shows another embodiment of the present invention. The retainer 1 of this embodiment has a protrusion formed on the top F of the drive shaft A, and the protrusion hits the stop plate 2 to prevent it from falling off. This is suitable when it is difficult for the tool 1 to be locked to the parietal portion F, and the retaining tool 1 of this embodiment is formed with a square or circular through-hole 6 in the stop plate 2 where the projections abut. Has been.

  Thus, when the retainer 1 is locked to the drive shaft A as in the above embodiment, the protrusion of the top F of the drive shaft A is fitted into the through hole 6 so that the retainer 1 is attached to the head. The top F is securely locked.

  One or a plurality of the through holes 6 may be formed according to the protrusions formed on the top of the head, and the opening area of the through holes 6 may be formed according to the size of the protrusions. .

  The present invention is used in a vehicle maintenance factory or the like that performs disassembly and maintenance work on the drive shaft of a rear wheel of an automobile, particularly a large vehicle.

It is a longitudinal cross-sectional view of the bolt shaft retainer of the present invention drive shaft. It is a top view of the retaining tool of a bolt same as the above. It is explanatory drawing which shows the usage method of the retaining tool of a volt | bolt same as the above. It is a top view of the stopper of the volt | bolt of the drive shaft of the other Example of this invention. It is a longitudinal cross-sectional view of an example of a rear wheel of a large vehicle.

Explanation of symbols

1 Drive shaft bolt retainer 2 Stop plate 3 Magnet 4 Handle part 5 Projection (screw)
F2 recess (center hole)

Claims (3)

  A tool used for a drive shaft of a type in which the top of the drive shaft is fastened to a wheel portion of an automobile with a plurality of bolts, the tool being able to cover the top of the drive shaft and preventing the bolt from coming off. A drive shaft bolt having a plate, a magnet fixed to one surface of the stop plate so as to be magnetically attachable to the top of the drive shaft, and a handle protruding from the other surface of the stop plate Stopper.   The drive shaft bolt retainer according to claim 1, wherein a through hole is formed in the stop plate. The drive shaft bolt according to claim 1 or 2, wherein a protrusion projecting from the stop plate is provided at a central portion of the magnet, and the protrusion is formed to be engageable with a recess of the top of the shaft. Retaining tool.

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