KR20160058405A - Universal joint with waterproof cover - Google Patents

Universal joint with waterproof cover Download PDF

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Publication number
KR20160058405A
KR20160058405A KR1020140159783A KR20140159783A KR20160058405A KR 20160058405 A KR20160058405 A KR 20160058405A KR 1020140159783 A KR1020140159783 A KR 1020140159783A KR 20140159783 A KR20140159783 A KR 20140159783A KR 20160058405 A KR20160058405 A KR 20160058405A
Authority
KR
South Korea
Prior art keywords
yoke
coupling hole
waterproof cover
universal joint
cover
Prior art date
Application number
KR1020140159783A
Other languages
Korean (ko)
Inventor
손인수
이상필
김효석
Original Assignee
동의대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 동의대학교 산학협력단 filed Critical 동의대학교 산학협력단
Priority to KR1020140159783A priority Critical patent/KR20160058405A/en
Publication of KR20160058405A publication Critical patent/KR20160058405A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S464/00—Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts
    • Y10S464/904—Homokinetic coupling
    • Y10S464/905—Torque transmitted via radially extending pin

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

The present invention relates to a universal joint having a waterproof cover and has a waterproof cover for preventing moisture penetration, thereby eliminating the problem of derailment and breakage due to corrosion of the snap ring.
The present invention relates to a spider having a cross shape having a shaft extending in all directions so as to be inserted into a coupling hole of a yoke positioned on a drive shaft and a coupling hole of a yoke positioned on a driven shaft, And a snap ring which is fitted in and fixed to a snap groove formed on an inner circumferential surface of the coupling hole so that the rotary cap is not separated from the coupling hole of the yoke and the coupling hole of the yoke so that one side is in contact with the rotary cap, And a waterproof cover which covers the coupling hole of the yoke and blocks the penetration of moisture when the cap is inserted into the coupling hole of the yoke and is coupled.

Description

UNIVERSAL JOINT WITH WATERPROOF COVER WITH A WATERPROOF COVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint, and more particularly, to a universal joint having a waterproof cover to effectively prevent derailment and breakage due to corrosion of a snap ring by providing a waterproof cover for blocking moisture penetration.

In general, a universal joint refers to a power transmission device used to connect two shafts when the two shafts are relatively far apart or when the angles of the two shafts are fluid.

These universal joints allow one shaft to drive the other shaft, even though the two axes are not perfectly aligned, and efficiently transmit power and moment to the driven shaft with angular variation in the drive shaft.

As shown in Figs. 1 and 2, the universal joint of the LT type includes a coupling hole 6 and a slave shaft 3 of the yoke 4 located on the drive shaft 2, Shaped spider 10 having a shaft 11 extending in four directions so as to be inserted into an engaging hole 6 of a yoke 4 which is located on the outer side of the spindle 10, A rotary cap 15 which is coupled to the spindle 17 to form a spider kit 1 and a rotary cap 15 which is connected to the inner circumferential surface of the coupling hole 6 so as not to be detached from the coupling hole 6 of the yoke 4 A snap ring 21 which is fitted in the formed snap groove 7 so that one side is in contact with the rotary cap 15 and an oil chamber 20 for preventing the oil in the rotary cap 15 from leaking, I had.

The universal joint according to the related art having such a configuration can drive one shaft with another shaft even when the drive shaft and the driven shaft are not completely aligned, and also has excellent performance in terms of transmitting power and moment to the driven shaft .

However, in the universal joint according to the related art, in the environment where a large amount of moisture is infiltrated, as in the case where it is applied to a conveyor for conveying a thick plate, a hot-rolled steel sheet or the like in a steelworks where cooling water is used, The snap ring 21 does not play a role, and problems such as derailment and breakage frequently occur. 3 is a photograph of a universal joint in which the snap ring 21 is derailed and broken.

Particularly, in the case of a conveyor, since it is not operated for 24 hours and stops and operates repeatedly, the snap ring 21 is subjected to a heavy load, and when the corrosion occurs, the life is very short and the risk is high.

Korean Patent Laid-Open Publication No. 2001-0049015 (201.06.15)

Accordingly, the present invention has been made to solve the above-mentioned problems of the related art, and an object of the present invention is to provide a waterproof cover for preventing penetration of moisture, And a universal joint having a cover.

Technical Solution According to an aspect of the present invention, there is provided a universal joint comprising: a cross-shaped spider having a coupling hole of a yoke positioned on a drive shaft and a shaft extending in all directions so as to be inserted into a coupling hole of a yoke positioned on a subordinate axis; A rotation cap which is rotatably coupled to the spider outer side so as to be rotatable with respect to an outer side of the shaft of the spider and a snap cap which is fixedly inserted into a snap groove formed on an inner circumferential surface of the coupling hole so that the rotation cap is not separated from the coupling hole of the yoke, A universal joint comprising a snap ring to be brought into contact with a rotating cap, the universal joint comprising: a waterproof cover which covers the coupling hole of the yoke and blocks the penetration of moisture in a state where the shaft of the spider and the rotary cap are inserted into the coupling hole of the yoke, Is characterized by its technical structure.

Here, a rubber packing is further provided between the yoke and the waterproof cover in a corresponding form of the waterproof cover.

The plurality of bolts penetrate the waterproof cover and are screwed along the circumference of the rotation cap to position the waterproof cover so as to cover the coupling hole of the yoke.

Further, a plurality of bolts penetrate through the circumference of the waterproof cover to be screwed to the yoke so as to position the waterproof cover to cover the coupling hole of the yoke.

The rubber packing is formed in a ring shape, and the waterproof cover has a ring-shaped cover body having an opening portion at a center portion thereof, and a transparent window coupled to the opening portion of the cover body, So that it is possible to observe the internal state of the coupling hole.

The waterproof cover may include a cover body having a ring shape having an opening portion at a central portion thereof and a transparent window provided at an opening portion of the cover body so as to observe an inner state of the coupling hole of the yoke. can do.

On the other hand, the conveying conveyor according to the present invention can include the universal joint as a feature of its technical construction.

The universal joint having the waterproof cover according to the present invention can solve the problem of derailment and breakage due to the corrosion of the snap ring by the structure having the waterproof cover.

Further, in the present invention, when a part of the waterproof cover is provided as a transparent window, it is possible to easily grasp the inner state of the coupling hole of the yoke while blocking the penetration of moisture by the waterproof cover.

1 is a perspective view of a conventional assembly
2 is a cross-sectional view showing a coupling structure of a universal joint according to the prior art;
Fig. 3 is a photograph of a snap ring detached and broken in a universal joint according to the prior art
FIG. 4 is a perspective view of an assembled structure for explaining a configuration of a universal joint according to an embodiment of the present invention.
5 is a sectional view showing a coupling structure of a universal joint according to an embodiment of the present invention
6 is a sectional view for explaining a configuration of a universal joint according to a first modified embodiment of the present invention
FIG. 7 is a perspective view of an assembled structure for explaining a configuration of a universal joint according to a second modified embodiment of the present invention

A universal joint having a waterproof cover according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

Also, the terms first and second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 4 is an assembly view for explaining a configuration of a universal joint according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view illustrating a joint structure of a universal joint according to an embodiment of the present invention.

As shown in the figure, the universal joint according to the embodiment of the present invention includes a yoke 4, a spider 10, and a rotation cap (not shown) which are respectively located on the drive shaft 2 and the driven shaft 3, 15 but also has a simple but unique waterproof cover 31 for blocking water penetrating into the coupling hole 6 of the yoke 4. [ As a result, it is possible to effectively suppress the problems that may occur when moisture penetrates into the coupling hole 6 of the yoke 4.

Hereinafter, the structure of the universal joint according to the embodiment of the present invention will be described in detail with reference to the waterproof cover 31.

First, the waterproof cover 31 serves to prevent moisture from penetrating into the coupling hole 6 of the yoke 4, as described above. For this, the waterproof cover 31 is formed in a disk shape corresponding to the coupling hole 6 of the yoke 4 as shown in the drawing, and is formed so as to cover the coupling hole 6 And a plurality of through holes 31a are formed in the periphery thereof for the penetration of the bolt 33.

According to this construction, the waterproof cover 31 is fixed to the yoke 4 by the bolts coupled to the bolt holes 4a formed in the yoke 4 and covers the joint holes 6 in the state, The water penetrating into the hole 6 can be blocked. It is preferable that a rubber packing 32 is further provided between the yoke 4 and the waterproof cover 31 in the form of a corresponding disk of the waterproof cover 31. It is preferable that the rubber packing 32 has a sufficiently large area and a semicircular groove 32a formed at its periphery to prevent interference with the bolt 33.

According to the structure in which the waterproof cover 31 and the rubber packing 32 for covering the joint hole 6 of the yoke 4 are provided, water infiltration can be effectively blocked in an environment like a steel mill using a large amount of cooling water . The snap ring 21 located in the coupling hole 6 of the yoke 4 can be prevented from being corroded by water and the spider 10 and the rotary cap 15 Can be removed from the yoke 4, or the spider kit 1 can be prevented from being damaged.

The spider 10 has four springs 10 extending in four directions so as to be inserted into the coupling hole 6 of the yoke 4 located in the drive shaft 2 and the coupling hole 6 of the yoke 4 located in the slave shaft 3, Shafts 11 and has a cross shape as a whole. Each of the shafts 11 provided in the spider 10 is fitted with a rotary cap 15 provided with a bearing 17 (needle bearing) therein. (Although the bearings 17 are illustrated as being installed on the shaft 11 of the spider 10 for the sake of explanation, they are actually installed inside the rotary cap 15)

In addition, a ring-shaped oil chamber 20 is fitted on the outer circumferential surface of the shaft 11 of the spider 10 so as to block the clearance between the lower end of the rotary cap 15 and the gap. Thus, leakage of the oil from the bearing (17) provided in the rotary cap (15) can be blocked.

The yoke 4 provided on the driving shaft 2 and the driven shaft 3 has a coupling hole 6 into which the shaft 11 and the rotary cap 15 of the spider 10 are inserted. A snap ring 7 is formed on the inner circumferential surface of the coupling hole 6 and a snap ring 21 is fitted to the snap groove 7 to fix the shaft 11 and the rotary cap 15 of the spider 10. [ To prevent it from being detached. A bolt hole 4a is formed in the yoke 4 in the circumferential direction around the coupling hole 6 so that the bolts 33 for fixing the waterproof cover 31 are coupled.

A universal joint according to a modified embodiment of the present invention will be described below.

6 is a cross-sectional view illustrating a configuration of a universal joint according to a first modified embodiment of the present invention.

The bolt 33 for fixing the waterproof cover 31 to the yoke 4 is not fastened to the yoke 4 but is fastened to the upper surface of the rotary cap 15, . According to this configuration, the bolt hole 4a to which the bolt 33 is fastened is formed along the upper surface circumference of the rotary cap 15 instead of the yoke 4.

According to the first modified embodiment, there is a difference in that the bolt hole 4a is machined in the rotary cap 15 instead of machining the bolt hole 4a in the yoke 4 as compared with the pre-deformation embodiment. Therefore, it is possible to follow the advantageous structure in terms of price and ease of operation considering the use environment.

Here, except for the structural difference described above, it can be said that it is a comparative example in comparison with the pre-deformation configuration, so that detailed description about the remaining configurations will be omitted.

7 is an assembled view for explaining a configuration of a universal joint according to a second modified embodiment of the present invention.

As shown in the figure, in the second modified embodiment of the present invention, a part of the waterproof cover 31 is provided as a transparent window 35. FIG. To this end, the waterproof cover is composed of a ring-shaped cover body having an opening in which a central portion is opened, and a transparent window (35) provided in the opening of the cover body. The rubber packing 32 is formed in a ring shape.

If a part of the waterproof cover 31 is provided as the transparent window 35, the inner state of the coupling hole 6 of the yoke 4 can be easily observed, so that it is judged that the operation of the universal joint is abnormal, Even if the corresponding parts are not disassembled, the state of the retaining ring 21 existing in the engaging hole 6 and the existence of the oil of the bearing 17 are very helpful.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

1: spider kit 2: drive shaft
3: slave shaft 4: yoke
6: Coupling ball 7: Snap groove
10: Spyder 11: Shaft
15: rotating cap 17: bearing
20: Oil chamber 31: Waterproof cover
32: Rubber packing 35: Transparent window

Claims (6)

A rotatable spider rotatably coupled to the outside of the shaft of the spider, the spiral having a shaft extending in four directions so as to be inserted into a coupling hole of the yoke positioned on the driven shaft, A universal joint including a snap ring fixed to a snap groove formed on an inner circumferential surface of a coupling hole so that a rotary cap is not separated from a coupling hole of the yoke and a yoke,
And a waterproof cover which covers the coupling hole of the yoke and blocks the penetration of moisture in a state where the shaft and the rotary cap of the spider are inserted and coupled to the coupling hole of the yoke. The method according to claim 1,
And a rubber packing is further provided between the yoke and the waterproof cover in a corresponding form of the waterproof cover. 3. The method of claim 2,
Wherein a plurality of bolts penetrate through the waterproof cover and are screwed along the circumference of the upper surface of the rotation cap to position the waterproof cover so as to cover the coupling hole of the yoke. 3. The method of claim 2,
Wherein a plurality of bolts penetrate through the circumference of the waterproof cover and are screwed to the yoke so as to position the waterproof cover to cover the coupling hole of the yoke. 3. The method of claim 2,
Wherein the waterproof cover comprises a cover body formed in a ring shape having an opening portion at a central portion thereof and a transparent window provided at an opening portion of the cover body so as to observe an internal state of the coupling hole of the yoke. Joints. A conveying conveyor apparatus comprising a universal joint according to any one of claims 1 to 5.
KR1020140159783A 2014-11-17 2014-11-17 Universal joint with waterproof cover KR20160058405A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020140159783A KR20160058405A (en) 2014-11-17 2014-11-17 Universal joint with waterproof cover

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107289002A (en) * 2017-05-05 2017-10-24 中国船舶重工集团公司第七0四研究所 Edge of a knife universal joint for the small force value standard set-up of dead weight type safe
CN107795594A (en) * 2017-11-17 2018-03-13 北京博科测试系统股份有限公司 Underwater vibroseis and its universal driving device
CN112677005A (en) * 2020-12-18 2021-04-20 浙江谋皮环保科技有限公司 Sealing waterproof type jacking mechanism of movable bearing seat

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107289002A (en) * 2017-05-05 2017-10-24 中国船舶重工集团公司第七0四研究所 Edge of a knife universal joint for the small force value standard set-up of dead weight type safe
CN107289002B (en) * 2017-05-05 2019-05-03 中国船舶重工集团公司第七0四研究所 Edge of a knife universal joint for the small force value standard set-up of dead weight type safe
CN107795594A (en) * 2017-11-17 2018-03-13 北京博科测试系统股份有限公司 Underwater vibroseis and its universal driving device
CN112677005A (en) * 2020-12-18 2021-04-20 浙江谋皮环保科技有限公司 Sealing waterproof type jacking mechanism of movable bearing seat
CN112677005B (en) * 2020-12-18 2022-12-27 浙江谋皮环保科技有限公司 Remove bearing frame's tight mechanism in sealed waterproof type top

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