JPH04122224U - sleeve yoke - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent oil leakage and improve rigidity of the sleeve yoke. [Structure] A joint yoke 10b is provided at one end of a hollow shaft 10a with a spline 10c formed on the inner surface, the hollow shaft portion is spline-coupled to the drive shaft of the transmission, and the joint yoke is connected to the joint yoke of the propeller shaft. A thick disk-shaped plug 11 is welded to the joint yoke side open end of the hollow shaft of the yoke 10 over the entire circumference by projection welding.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a sleeve yoke that transmits driving force to a propeller shaft.

0002

[Conventional technology]

For example, in a four-wheel drive vehicle, the driving force of the engine is transferred to a transformer as shown in Figure 4. Front propeller shaft 3 and rear prop via transmission 1 and transfer 2 The transmission is transmitted to the propeller shaft 4, and these front propeller shafts 3 and rear propeller shafts The power is transmitted from the propeller shaft 4 to the front wheels and rear wheels (both not shown). And freon The rear propeller shaft 3 and the rear propeller shaft 4 each have a sleeve yoke at their base end. It is connected to each drive shaft (not shown) of the transfer 2 via links 5 and 6, and each tip is connected to each drive shaft (not shown) of the transfer 2 through Front and rear differential gears (both shown) are connected via flange yokes 7 and 8. ).

0003 As shown in FIG. 5, the sleeve yoke 6 has a universal joint formed at the tip of a hollow shaft portion 6a. A two-pronged metal fitting, that is, a joint yoke 6b, is provided, and the inner surface of the shaft portion 6a A spline 6c is formed for spline connection to the drive shaft of the transfer 2. has been done. A spline is connected to the drive shaft of the transfer 2 via the spline 6c. be combined. The open end 6 of this hollow shaft portion 6a on the joint yoke 6b side Plug 9 is fitted in d in a fluid-tight manner, allowing oil in transfer 2 to flow out. This is prevented. The sleeve yoke 5 of the front propeller shaft 3 also A plug is fitted in the same way as the leave yoke 6.

0004

[Problem that the idea aims to solve]

The plug 9 is a sheet metal product formed by press working, and its peripheral portion 9a is a shaft portion. The machine is fitted into the opening end 6d of the opening end 6d of the opening end 6a, and is inserted at multiple locations, e.g. It is caulked and fixed using the mechanical caulking method. However, the caulking method , There are variations in each caulking part, which can cause oil leakage. Opening plug 9 The pulling force from the mouth end 6d is about 400 kgf, and the plug 9 is not crimped. Due to the construction method, the rigidity of the sleeve yoke 6 is slightly inferior, and vibrations especially during high-speed driving There are problems such as being a cause of occurrence.

[0005] The present invention was made in view of the above points, and the connection between the sleeve yoke and the plug The three-piece design prevents oil leakage from the parts, and also increases rigidity and suppresses vibration. The purpose is to provide a buy-job.

[0006]

[Means to solve the problem]

According to the present invention, in order to achieve the above object, the inner surface has a spline formed on the inner surface. A jaunt yoke is provided at one end of the hollow shaft, and the hollow shaft is used to drive the transmission. The joint yoke is spline-coupled to the moving shaft, and the joint yoke is the propeller shaft joint. The joint yoke side of the hollow shaft portion of the sleeve yoke connected to the yoke A thick disk-shaped plug is welded around the entire circumference by projection welding to the open end of the It has a fixed structure.

[0007]

[Effect]

Insert a thick plug into the open end of the hollow shaft of the sleeve yoke on the joint yoke side. Welded around the entire circumference by projection welding. This allows the sleeve yoke to The open end of the hollow shaft is liquid-tight to prevent oil leakage. In addition, the sleeve The rigidity of the arc also increases.

[0008]

【Example】

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, the sleeve yoke 10 has a hollow shaft portion 10a, and a shaft portion 10a at the tip. A joint yoke 10b is provided, and a joint yoke 10b is provided on the inner surface of the shaft portion 10a along the axial direction. A spline 10c is formed. The opening end of the shaft portion 10a on the sleeve yoke side is As shown in the figure, the diameter is enlarged concentrically with the holes 10d and 10e and with a step difference. A plug 11 is welded and fixed to the open end of 10d.

[0009] The plug 11 has a thick disk shape as shown in FIG. 2, and its outer diameter is similar to that of the hole 10e. The hole also has a slightly smaller diameter and a slightly larger diameter than the hole 10d, and one side of the circumferential surface 11a. The half 11b is chamfered over the entire circumference to form a tapered surface, and the outer diameter of the small diameter portion is , the diameter is slightly smaller than that of the hole 10d. The plug 11 is made of a low carbon steel plate. It is formed by machining material.

0010 This plug 11 is welded to the sleeve yoke 10 by projection welding. be done. That is, as shown in FIG. 3, one cylindrical electrode 13 of the welding machine 12 is The shaft portion 10a of the block 10 is fitted to mechanically support it and to electrically connect it. , and a tapered surface of the plug 11 at the corner 10d' of the open end 10d of the sleeve yoke 10. 11b over the entire circumference (Fig. 2), and the other side of the welding machine 12 is placed on the outer surface of the plug 11. The cylindrical electrodes 14 are brought into contact with each other and pressed together with a predetermined pressing force P. At this time pickpocket Insert the collar 15 into the hole 10e of the tube yoke 10, and insert the plug into the holes 10d and 10e. 11 and electrode 14 are precisely positioned concentrically.

[0011] Next, a welding current is applied between the electrodes 13 and 14 to form the hole 10d of the sleeve yoke 10. The tapered surface 11b of the plug 11 is welded around the entire circumference to the open end of the plug 11. Welding at this time The conditions are welding current I = 40000A, energization time T = 16 cycles (=16/60 seconds), pause for 2 cycles (=2/60 seconds), or welding current I'=44000 A. Conduct energization time T' = 16 cycles, pause for 2 cycles, and repeat 3 times. . This energization control is performed by, for example, a thyristor. In addition, the pressing force of the electrode 14 P is assumed to be P=1500 kg. Note that the sleeve yoke 10, plug 11, etc. The tank is degreased by cleaning it with petroleum benzene, for example.

0012 This allows the plug 11 to have its tapered surface 11c aligned with the hole 10d of the sleeve yoke 10. It is welded around the entire circumference of the open end and closed in a liquid-tight manner.

[0013]

[Effect of the idea] As explained above, according to the present invention, the hollow shaft portion with splines formed on the inner surface A jaunt yoke is provided at one end, and the hollow shaft is connected to the drive shaft of the transmission. The joint yoke is spline-coupled and the joint yoke of the propeller shaft. an opening on the joint yoke side of the hollow shaft portion of the sleeve yoke connected to the sleeve yoke; A thick disk-shaped plug is welded and fixed around the entire circumference at the end using projection welding. Therefore, the open end of the hollow shaft of the sleeve yoke on the joint yoke side was closed liquid-tightly. It can be closed to prevent oil leakage. Moreover, the thick plastic By using the sleeve yoke, the rigidity of the sleeve yoke can be increased and vibrations can be reduced. There are effects such as being able to reduce

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a sleeve yoke according to the present invention.

FIG. 2 is an enlarged view of the main part of FIG. 1;

FIG. 3 is a diagram showing a state in which the sleeve yoke and plug of FIG. 1 are attached to a projection welder.

FIG. 4 is an assembled perspective view showing an example of a vehicle drive system.

FIG. 5 is a sectional view of a conventional sleeve yoke.

[Explanation of symbols]

1 Transmission 2 Transfer 3 Front propeller shaft 4 Rear prop shaft 10 Sleeve yoke 10a Hollow shaft part 10b joint yoke 11 Plug 12 Projection welding machine

Claims (1)

[Scope of utility model registration request] 1. A sleeve in which a joint yoke is provided at one end of a hollow shaft portion having a spline formed on the inner surface, the hollow shaft portion is spline-coupled to a drive shaft of a transmission, and a joint yoke is connected to a joint yoke of a propeller shaft. A sleeve yoke, characterized in that a thick disk-shaped plug is welded and fixed to the open end of the hollow shaft portion of the yoke on the side of the joint yoke by projection welding over the entire circumference.