JPH04127424U - Through-hole sealing device for cross shaft universal joint - Google Patents

Abstract

(57) [Summary] [Structure] Cover parts 11 and 32 are provided to close the through hole 23. A seal portion 12 is fitted into the cover portions 11 and 23 so as to be inserted into and removed from the through hole 23 while maintaining liquid tightness.
31 is provided integrally. [Effect] The through hole 23 can be easily closed and opened by simply inserting and removing it into the through hole 23. Therefore, it becomes possible to improve the efficiency of greasing work.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a through-hole sealing device for a cross shaft universal joint, and more specifically, for example, In cross shaft universal joints used in rolling mills, etc., the coupling yoke is The present invention relates to a sealing device that opens and closes a through hole.

0002

[Conventional technology]

Generally, this type of cross-shaft universal joint is used, for example, in the drive shaft of a rolling mill that rolls steel, etc. It is equipped with a yoke that constitutes the driving side or the driven side. In Figure 6 As shown, the yoke 100 constituting the driven side has a cross section of the cross shaft 101. A through hole 103 is formed opposite to a greasing nipple 102 attached to the There is. This through hole 103 is for lubricating through the nipple 102. It is. Regarding the lubricant supply mechanism of the above-mentioned cross shaft joint, for example, It is disclosed in the publication No.-164826.

0003 The drive shaft is used with cooling water applied to it, so the cooling water It is necessary to close the through hole 103 to prevent it from entering the inside of the yoke 100. So Here, conventionally, as a through-hole sealing device, a metal member is installed at the entrance side step of the through-hole 103. It was closed by fastening the cover member 104 with bolts 105.

0004

[Problem that the idea aims to solve]

In this way, in the conventional structure, the metal cover member 104 is fastened with bolts 105. Therefore, attaching and detaching the cover member 104 is troublesome, and greasing work takes time and effort. It was. This invention was created in view of the above problems, and allows for easy and quick greasing work. The purpose is to provide a through-hole sealing device for cross shaft universal joints that can Ru.

[0005]

[Means to solve the problem]

In order to solve the above problems, the through-hole sealing device of the cross shaft universal joint of the present invention has been developed A through hole formed in the coupling yoke facing the greasing nipple of the shaft In a through-hole sealing device for a cross-shaft universal joint that is equipped with a cover portion that closes the A seal part that can be inserted and removed freely while maintaining liquid tightness in the through hole is attached to the above cover part. It is characterized by being integrated.

[0006]

[Effect]

According to the above configuration, the seal portion is inserted into the through hole in a state where it is removably fitted into the through hole. occlude. Furthermore, by pulling out the above cover part, the through hole can be easily opened. It will be done.

[0007]

【Example】

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. FIG. 3 shows a cross axis showing an example of use of the through-hole sealing device 10 in an embodiment of the present invention. This is a partial cross-sectional side view of the universal joint 20, and the cross-shaft universal joint 20 is It is equipped with a yoke 21 that constitutes the side that fixes the roll, and the main part of this yoke 21 A through hole 23 facing the cross portion of the cross shaft 22 is formed in the center of the body. The exit side of the through hole 23 is a greasing nipple formed at the cross section of the cross shaft 22. 24, so that the operator can lubricate the lubrication nipple 24 from the inlet side. It has a diameter that allows for In FIG. 3, 25 indicates the drive of the cross shaft 22. This is a fitting yoke connected to the moving side.

[0008] Referring to FIG. 1, a stepped portion is formed on the entrance side of the through hole 23. The sealing device 10 of the present invention is fitted into the stepped portion. The sealing device 10 has the through hole 2 A cover part 11 that closes the inlet of It includes a sealing part 12 that seals the space between the bar part 11 and the through hole 23. .

[0009] The cover part 11 is made of a pair of plate materials with the seal part 12 sandwiched between the outer circumferential sides. are integrally constructed by facing each other and fixing them with bolts 13 and nuts 14. The seal portion 12 is clamped around the outer periphery by the tightening force of the bolt 13. Also A handle 15 is arranged on the outer surface of the bar portion 11 (the surface opposite to the through hole 23). The handle 15 is fastened together with the bolt 13.

0010 Referring to FIG. 2, the seal portion 12 is attached to a ring-shaped core bar 16 having an L-shaped cross section. An annular main body part 12a that is physically fixed, and the cover part from the outer periphery of the main body part 12a. 11 in the opposite insertion direction (right side in FIG. 2) in a conical shape and inside the stepped portion of the through hole 23. The annular lip portion 12b that slides on the circumference is integrally formed with hard rubber (vulcanite). It is shaped. In this embodiment, the outer peripheral side of this annular lip portion 12b It is molded thickly in the radial direction to ensure sufficient wear resistance and elasticity. Also circular The diameter of the lip portion 12b is smaller than the stepped portion of the through hole 23 in the free state by a tightening margin. It is set slightly larger.

[0011] According to the above configuration, the cover part 11 is fitted into the stepped part of the through hole 23 by grasping the handle 15. Then, the seal portion 12 is pressed inward by the above-mentioned tightening margin in the radial direction of the through hole 23. The state in which the liquid-tightness is maintained together with the cover part 11 by elastically bending to close the through hole 23. Furthermore, grasp the handle 15 and cover from the stepped part of the through hole 23. When the portion 11 is pulled out, the through-hole sealing device 10 is easily removed from the through-hole 23.

0012 As described above, according to this embodiment, the handle 15 is grasped and the stepped portion of the through hole 23 is closed. The through hole 23 can be easily closed or opened by simply inserting and removing the sealing device 10. Wear. Therefore, the device can be attached and detached easily and quickly, improving the efficiency of greasing work. becomes possible. In another embodiment shown in Figures 4 and 5, the The through-hole sealing device 30 shown in FIG. This through-hole sealing device 30 has an annular peripheral wall. 31, and an end wall 32 that closes one end of the peripheral wall 31, and the peripheral wall 31 is The seal portion and the end wall 32 constitute a cover portion, respectively. The other end side of the peripheral wall 31 A large number of slits 33 extending in the direction of the center line are formed in the The other end side of the peripheral wall 31 is configured to be able to bend in the radial direction. On the other hand, The stepped portion of the through hole 23 is tapered so that the exit side is narrower by the tightening margin than the diameter of the peripheral wall 31. formed into a shape. In addition, in FIG. 4, 34 is an air vent hole bored in the end wall 32. 35 is a handle fixed to the end wall 32 with screws 36.

[0013] According to the configuration shown in FIGS. 4 and 5, the handle 35 is grasped and the stepped portion of the through hole 23 is opened. When the sealing device 30 is fitted, the other end side of the peripheral wall 31 serving as a seal portion is inserted into the through hole. By being pressed inward by the above-mentioned tightening margin in the radial direction of 23 and elastically deflecting, The through hole 23 is closed while maintaining liquid tightness together with the end wall 32 as a cover part. Ru. Furthermore, if you grab the handle 35 and pull out the cover part 11 from the stepped part of the through hole 23, The sealing device 30 is easily removed from the through hole 23. In this way, the implementation of Figures 4 and 5 In the example, the through-hole sealing device 30 is pulled out from the stepped portion of the through-hole 23 by grasping the handle 35. The through hole 23 can be easily closed and opened just by inserting it. So equipment Attachment and detachment becomes easy and quick, making it possible to improve the efficiency of greasing work.

[0014] Note that the embodiments described above are only preferred specific examples, and for example, the embodiments described in FIGS. 1 and 2 The cover portion may be made of resin, or the through-hole sealing device 30 shown in FIGS. 4 and 5 may be formed without a stepped portion. Various design changes are allowed within the scope of this utility model registration request, such as attaching and detaching it to the through hole. Needless to say, this is possible.

[0015]

[Effect of the idea]

As explained above, according to the through-hole sealing device for the cross shaft universal joint of the present invention, The through-hole can be easily closed or opened by simply inserting and removing the through-hole sealing device into the through-hole. I can do that. Therefore, the device can be attached and detached easily and quickly, improving the efficiency of greasing work. It becomes possible to

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts showing an embodiment of the present invention.

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

3 is a partially sectional side view of a cross-shaft universal joint showing an example of use of the through-hole sealing device in the embodiment of FIG. 1; FIG.

FIG. 4 is a sectional view of a main part showing another embodiment of the present invention.

5 is a partially sectional side view of a cross-shaft universal joint showing an example of use of the through-hole sealing device in the embodiment of FIG. 4; FIG.

FIG. 6 is a sectional view of a main part of a conventional through-hole sealing device.

[Explanation of symbols]

10 Through-hole sealing device 11 Cover part 12 Seal part 21 York 23 Through hole 30 Through-hole sealing device 31 Peripheral wall (component of seal part) 32 End wall (component of cover part)

Claims (1)

[Scope of utility model registration request] 1. A through-hole sealing device for a cross-shaft universal joint, comprising a cover portion that closes a through-hole formed in a coupling yoke in a state facing a greasing nipple of a cross-shaft, in which liquid is supplied to the through-hole. 1. A through-hole sealing device for a cross-shaft universal joint, characterized in that a sealing portion that is fitted in and out of the cover while maintaining tightness is integrally provided with the cover portion.