JPS6327148Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a disassembleable constant velocity joint.

(Prior art) In constant velocity joints used in automobiles, etc.
Normally, the inboard joint 1 on the engine side and the shaft 3 are removably connected by a relatively soft ring-shaped clip, and the outboard joint 2 and shaft 3 on the wheel side are connected in a cross-section as shown in Figure 1 (b). They are irremovably connected by a round ring-shaped clip 4. This is because it is necessary to firmly connect the wheel side that vibrates strongly, and for this purpose, for example, the outboard boot 5
If the inboard joint 1 side is damaged, it is not only time-consuming to disassemble the inboard joint 1 side and then replace the boot 5, but also the grease inside the joint is lost due to the damage to the boot 5. Even if it scatters, it cannot be disassembled and refilled, so the outboard joint 2, boot 5, and shaft 3 have to be replaced, resulting in increased costs. There is.

(Purpose) The present invention was developed in view of these problems, and its purpose is to create an improved device that maintains the same bonding strength as the non-degradable type, yet can be disassembled. The purpose is to provide a quick joint.

(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.

Figures 2 and 3 show an embodiment of the present invention applied to a constant velocity joint on the wheel side, and the reference numeral 11 in the figures indicates an inner member into which a shaft 15 is fitted, and the inner periphery thereof. By meshing the spline 12 cut into the surface with the spline 16 on the outer circumferential surface of the shaft 15, integral rotation of the two is ensured, and each spline is formed on the inner circumferential surface and the outer circumferential surface of the shaft 15, which are in contact with each other. A ring-shaped clip 18 having a rectangular cross section is fitted into circumferential stopper grooves 13 and 17 that are cut across 12 and 16 to connect them in the axial direction.

By the way, reference numeral 14 denotes a groove for inserting a tool, which is a characteristic feature of the present invention, and as shown in an enlarged view in FIG. In the case of this embodiment, the grooves are cut out at intervals of 120°, and the grooves are carved deeper than the bottom of the stopper groove 13 to form a groove between this groove 14 and the spline groove 16a of the shaft 15. A hole 19 extending in the axial direction
A wedge-shaped tool 30 having a cross section approximately the same shape as this hole 19 is inserted into the hole.
As shown in FIG. 5, this tool 30 is formed to have a length that is at least longer than the axial thickness of the inner 11, and has a tip portion facing the shaft 15 for compressing the ring-shaped clip 18. A tapered surface 31 is formed. In addition, code 2 in the figure
0 indicates balls that roll within axial grooves 22 and 23 provided on the inner circumferential surface of the outer 21 and the outer circumferential surface of the inner 11, and 24 indicates a retainer, respectively.

Therefore, in order to disassemble the joint configured in this way, first, the tool insertion groove 14 cut in the inner periphery of the inner 11 and the groove 16a of the spline 16 provided in the shaft 15 are cut in the axial direction. The tool 30 is press-fitted into the plurality of extending holes 19. As a result, the tip of the tool 30 is pushed between the stopper groove 13 of the inner 11 and the ring-shaped clip 18, and
A ring-shaped clip 1 is formed by its tapered surface 31.
8 toward the shaft 15 and its outer diameter is compressed to be smaller than the inner diameter of the inner 11, so if the shaft 15 is pulled out in this state, the inner 11 and the shaft 15 can be easily disassembled.

(Effects) As explained above, according to the present invention, a tool insertion groove having at least the same depth as the groove into which the ring-shaped expansion member is inserted is provided in the inner spline portion, so that Even with constant velocity joints that use a ring-shaped expansion member and have a high connection strength, the inner and shaft can be easily disassembled by simply inserting a wedge-shaped tool into the groove described above, making it easy to replace outboard boots, etc. Not only can the damage be significantly reduced, but the constant velocity joint can be used for a long period of time by performing treatments such as greasing, if necessary.

[Brief explanation of the drawing]

Figures 1A and 1B are diagrams showing a general drive shaft used in automobiles, etc. and a constant velocity joint used therein, and Figures 2 and 3 are side views of a device showing an embodiment of the present invention. The front view, Figure 4, is
FIG. 5, which is an enlarged view of the main parts of the same device, is an explanatory diagram showing the disassembly operation of the inner and the shaft. 11... Inner, 14... Groove for tool insertion,
15...shaft, 18...ring-shaped clip,
21...outer, 24...retainer.

Claims (1)

[Scope of utility model registration request] A spline provided on the inner periphery of the inner in a constant velocity joint of the type in which circumferential grooves are provided in both the inner and shaft to which the spline is fitted, and a ring-shaped expansion member is fitted into the groove to connect the two. Between the grooves at multiple locations in the circumferential direction,
A constant velocity joint characterized in that an axial groove having a depth reaching at least the bottom of the circumferential groove is provided, and the groove is used as an insertion groove for a tool that compresses the expansion member in the radial direction.