KR101669571B1 - Gear box having backlash adjusting function - Google Patents

Gear box having backlash adjusting function Download PDF

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Publication number
KR101669571B1
KR101669571B1 KR1020160083559A KR20160083559A KR101669571B1 KR 101669571 B1 KR101669571 B1 KR 101669571B1 KR 1020160083559 A KR1020160083559 A KR 1020160083559A KR 20160083559 A KR20160083559 A KR 20160083559A KR 101669571 B1 KR101669571 B1 KR 101669571B1
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KR
South Korea
Prior art keywords
bevel gear
gear
bearing
backlash
tightening nut
Prior art date
Application number
KR1020160083559A
Other languages
Korean (ko)
Inventor
도광회
Original Assignee
도광회
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Filing date
Publication date
Application filed by 도광회 filed Critical 도광회
Priority to KR1020160083559A priority Critical patent/KR101669571B1/en
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Publication of KR101669571B1 publication Critical patent/KR101669571B1/en

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    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H55/18—Special devices for taking up backlash
    • F16H55/20—Special devices for taking up backlash for bevel gears
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/038—Gearboxes for accommodating bevel gears

Abstract

A gear box according to the present invention comprises: a first bevel gear and a second bevel gear which are coupled to each other vertically in a gear box body; a first gear shaft and a second gear shaft which are mounted on the first bevel gear and the second bevel gear on one side in a longitudinal direction, respectively; a bearing which is placed on a side opposite to the side coming in contact with the second bevel gear of the first bevel gear; and a fastening nut which is screw-coupled to the side penetrating the first bevel gear of the first gear shaft and pressurizes the bearing to the first bevel gear side. The gear box according to the present invention can pressurize the first bevel gear irrespective of coupling of a bearing cap, thereby stably reducing backlash. The magnitude of backlash can be adjusted in a state that the first bevel gear and the second bevel gear are coupled by gears, thereby improving convenience of use.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gear box having a backlash adjustment function,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear box having a backlash between a pair of bevel gears, which is excellent in utilization, can control backlash without releasing a pair of bevel gears, and is easy to use.

Generally, when a pair of gears are held together, they are theoretically formed so as to be engaged with the gear teeth and the gear teeth, but they are spaced apart from each other due to manufacturing errors of the gears. Such a manufacturing error can not be smoothly performed due to variations in the center distance, tolerance at the time of assembly, including wear and deformation of the teeth due to the load, gearshift due to the load, and the like, A slight gap, that is, backlash occurs.

The backlash refers to the clearance between the gear teeth and the gear teeth in the circumferential direction when the gears are engaged and the gear teeth of the same size can not be engaged with each other without a clearance so that there is always a production tolerance . Such a backlash is generated when a pair of gears rotating in one direction are rotated in the opposite direction to each other, and the backlash is generated between the forward and reverse gears to increase stress and wear.

Therefore, the gear box to which the pair of gears are engaged is configured so that either one of the gears is previously pressurized with a predetermined magnitude of force so that the backlash between the gears is reduced.

Hereinafter, a conventional gear box will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are a perspective view and a cross-sectional perspective view of a conventional gearbox, and FIG. 3 is an exploded perspective view showing a structure for pressing a gear included in a conventional gearbox.

1 and 2, the conventional gear box includes a first bevel gear 11 and a second bevel gear 12 which are gear-engaged at right angles in a gear box body 10 having an internal space, The first gear shaft 21 and the second gear shaft 22 having one side connected to the first bevel gear 11 and the second bevel gear 12 are drawn out of the gearbox body 10.

The conventional gear box is provided with a bearing (not shown) that is seated on one side (left side in this embodiment) of the first bevel gear 11 so as to reduce backlash between the first bevel gear 11 and the second bevel gear 12 And a bearing cap 40 for pressing the bearing 30 toward the first bevel gear 11. The bearing cap 40 is mounted on one side of the gear box body 10 by means of a wrench bolt and presses the bearing 30 against the first bevel gear 11, The backlash is reduced by being brought into close contact with the bevel gear 12 side.

The conventional gear box configured as described above has an advantage that the backlash between the first bevel gear 11 and the second bevel gear 12 can be reduced, but the backlash reduction rate can not be controlled. That is, when the backlash between the first bevel gear 11 and the second bevel gear 12 is large, the first bevel gear 11 must be pressed with a larger force, The first bevel gear 11 must be pressed with a small force when the backlash between the bevel gears 12 is small. In a method of pressing the first bevel gear 11 by the tightening force of the bearing cap 40, There is a problem that it is difficult to adjust the pressing force to push the gear 11.

Of course, if the thickness of the bearing 30 is changed or the shape of the bearing cap 40 is changed, the pressing force of the first bevel gear 11 can be adjusted. However, the bearing 30 and the bearing cap 40, There is a difficulty in fabrication to produce different sizes.

KR 10-1996-0023933 A

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a bearing device that can pressurize a first bevel gear regardless of a fastening force of a bearing cap, And to provide a gear box capable of adjusting the size of the backlash in a state where the backlash is maintained.

According to an aspect of the present invention, there is provided a gear box comprising: a first bevel gear and a second bevel gear which are gear-engaged at right angles in a gear box body; A first gear shaft and a second gear shaft having one longitudinal side mounted on the first bevel gear and the second bevel gear, respectively; A bearing mounted on an opposite side of the first bevel gear that is in contact with the second bevel gear; And a tightening nut screwed to the first gear shaft through the first bevel gear to press the bearing toward the first bevel gear.

The tightening nut is applied as a loosening nut.

And a fixing bolt that is screwed to the outer circumferential surface of the tightening nut and has an end portion that is pressed onto the outer surface of the first gear shaft.

And a seating plate inserted between the tightening nut and the first bevel gear.

A gear box according to the present invention includes: a first bevel gear and a second bevel gear which are gear-engaged at right angles in a gear box body; A first gear shaft and a second gear shaft having one longitudinal side mounted on the first bevel gear and the second bevel gear, respectively; A bearing mounted on an opposite side of the first bevel gear that is in contact with the second bevel gear; A washer mounted on an outer surface of the bearing; A bearing cap coupled to one side of the gear box to cover the washer; And one end of which is screwed to the bearing cap so as to press the washer toward the bearing side.

The washer is made to have elasticity in the thickness direction.

A plurality of the pressing bolts are radially formed with respect to the center axis of the washer, and the plurality of pressing bolts are arranged at equal intervals.

The gear box according to the present invention can pressurize the first bevel gear regardless of the engagement of the bearing cap and can stably reduce the backlash, and when the first bevel gear and the second bevel gear are gear- So that it is convenient to use.

1 and 2 are a perspective view and a cross-sectional perspective view of a conventional gearbox.
3 is an exploded perspective view showing a structure for pressing a bevel gear included in a conventional gear box.
4 and 5 are a perspective view and a cross-sectional perspective view of a gearbox according to the present invention.
6 is an exploded perspective view showing a mounting structure of a fastening nut and a seating plate for pressing a bevel gear included in a gear box according to the present invention.
7 is an exploded perspective view showing a coupling structure of the tightening nut included in the second embodiment of the gear box according to the present invention.
8 and 9 are a perspective view and a cross-sectional perspective view of a gear box according to a third embodiment of the present invention.
10 is an exploded perspective view showing a mounting structure of a washer and a press bolt for pressing a bevel gear included in a gear box according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a gear box according to the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 are a perspective view and a cross-sectional perspective view of a gearbox according to the present invention, and FIG. 6 is an exploded perspective view showing a mounting structure of a fastening nut and a seating plate for pressing a bevel gear included in a gear box according to the present invention .

The gear box according to the present invention includes two bevel gears, i.e., a first bevel gear 200 and a second bevel gear 300 that are gear-engaged at right angles, and the components for pressing the first bevel gear 200 So that the backlash between the first bevel gear 200 and the second bevel gear 300 can be more stably controlled.

That is, the gear box according to the present invention includes a gear box body 100 having a rectangular parallelepiped shape having an internal space, a first bevel gear 200 geared at right angles in the gear box body 100, A first gear shaft 210 and a second gear shaft 310 having one side in the longitudinal direction and mounted on the first bevel gear 200 and the second bevel gear 300, A bearing 400 mounted on the opposite side of the bevel gear 200 in contact with the second bevel gear 300; The bearing 400 is mounted on the outer surface of the gearbox body 100 so as to cover the bearing 400 and the tightening nut 500 A bearing cap 600 and a plurality of wrench bolts 610 for fixing the bearing cap 600 to the gearbox body 100.

The outer circumferential surface of the first gear shaft 210 protruding through the first bevel gear 200 is formed with a male screw thread so that the tightening nut 500 can be screwed. 210 are moved in a direction toward or away from the bearing 400 according to the rotation direction.

When the user rotates the tightening nut 500 to one side and moves the tightening nut 500 to the bearing 400 side, the tightening nut 500 presses the bearing 400, The first bevel gear 200 is pressed toward the second bevel gear 300 so that the backlash between the first bevel gear 200 and the second bevel gear 300 is lost or reduced. At this time, the bearing cap 600 is mounted on the gearbox body 100 so as to simply cover the tightening nut 500 and the bearing 400, but does not press the bearing 400.

As described above, the gear box according to the present invention does not press the first bevel gear 200 by the tightening force of the bearing cap 600 coupled to the gear body box, but determines the backlash size according to the tightness of the tightening nut 500 As a result, the backlash can be more stably controlled. That is, since the backlash is adjusted according to the tightening degree of the tightening nut 500 regardless of the specifications of the gearbox body 100 and the bearing cap 600, the tightening nut 500 is slightly more If the tightening nut 500 is further loosened (more specifically, if the tightening nut 500 is slightly rotated in one direction so as to move in the direction in which the tightening nut 500 approaches the bearing 400), the backlash is further reduced, The backlash is increased when the tightening nut 500 is slightly rotated in the other direction so as to move in the direction away from the bearing 400. The backlash can be freely adjusted by the user depending on the application.

When the first bevel gear 200 and the second bevel gear 300 are produced in a large quantity, all of the first bevel gear 200 and the second bevel gear 300 are perfectly identical to each other . If the error is within the allowable tolerance range, the first bevel gear 200 and the second bevel gear 300 may be misaligned with each other. Even if the first bevel gear 200 and the second bevel gear 300 are determined to be genuine, there is a slight error from the design value. Therefore, even if the first bevel gear 200 and the second bevel gear 300 of the same product are used as genuine products, the backlash of each gear box is expressed in different sizes.

At this time, when the first gear is pressed by the bearing cap 600 as in the conventional case, the backlash of each gear box can not be adjusted to a certain size. However, The backlash of all the gear boxes can be set to the same size.

Also, since the size of the backlash is determined in the manufacturing process of the conventional gear box, the user can not adjust the backlash size. However, since the gear box according to the present invention allows the user to adjust the backlash size by rotating the tightening nut 500, The gear box can be utilized for various purposes. In the gear box according to the present invention, since the backlash can be adjusted by rotating the tightening nut 500 in a state where the first bevel gear 200 and the second bevel gear 300 are coupled to each other, The backlash can be adjusted more precisely by confirming the operation of the first bevel gear 200 and the second bevel gear 300.

Since the backlash of the gear box according to the present invention is adjusted according to the rotation of the tightening nut 500, when the tightening nut 500 is rotated arbitrarily, there is a serious problem that the backlash is changed regardless of the intention of the user have.

Therefore, it is preferable that the tightening nut 500 is applied as a loosening preventing nut so that it is not arbitrarily rotated by external vibration or impact. Such a loosening prevention nut is a part commercialized in the related technical field of the present invention, and thus a detailed description thereof will be omitted.

In addition, when the tightening nut 500 directly contacts the bearing 400, the contact surface between the tightening nut 500 and the bearing 400 may be damaged in the process of tightening the tightening nut 500, A large frictional force is generated between the nut 500 and the bearing 400 and a great deal of force is required to rotate the tightening nut 500. [

Therefore, the gear box according to the present invention may further include a seating plate 510 inserted between the tightening nut 500 and the bearing 400. When the seating plate 510 is provided between the tightening nut 500 and the bearing 400 as described above, the tightening nut 500 and the bearing 400 are not in direct contact with each other, There is an advantage that the damage can be reduced. Of course, when the tightening nut 500 is strongly pressed on the seating plate 510, the seating plate 510 may be damaged. However, in this case, only the seating plate 510 is replaced by the tightening nut 500 and the bearing 400) can be used continuously, and thus the maintenance cost can be reduced.

In this case, when the seating plate 510 is made of a material having a lower coefficient of friction than the tightening nut 500 or the bearing 400, the damage of the seating plate 510 can be reduced, 500) can be rotated, so that it is also advantageous in that it is convenient to use.

7 is an exploded perspective view showing a coupling structure of the tightening nut 500 included in the second embodiment of the gear box according to the present invention.

As described above, since the size of the backlash is determined according to the rotation of the tightening nut 500, the gearbox 500 according to the present invention should be configured such that the tightening nut 500 is not rotated at all. 4 to 6, if the tightening nut 500 is applied as an anti-loosening nut, the loosening of the tightening nut 500 can be prevented to some extent. However, If it is received continuously for a long time, there is a possibility that it will be solved to a certain level.

Accordingly, in order to more reliably prevent the rotation of the tightening nut 500, the gear box according to the present invention is screwed to the outer circumferential surface of the tightening nut 500 as shown in FIG. 7, And a fixing bolt 520 which is pressed onto the outer surface of the gear shaft 210.

The user tightens the fastening bolt 520 so that the end of the fastening bolt 520 is pressed against the outer surface of the first gear shaft 210 after the tightening nut 500 is tightened so that the backlash is adjusted to a degree desired by the user, So that the tightening nut 500 can not be rotated arbitrarily.

If the fixing bolt 520 for fixing the tightening nut 500 is provided as described above, the tightening nut 500 is not rotated arbitrarily unless the fixing bolt 520 is broken. It is possible to reliably prevent the phenomenon that the backlash of the backlight is changed.

In this embodiment, although only two fixing bolts 520 are screwed to each other at right angles, the number of the fixing bolts 520 and the screwing direction may be variously changed according to various conditions. have.

When the through hole is formed in the bearing cap 600, the oil chamber 220 may be provided to seal the through hole. The shape and the sealing structure of the bearing cap 600 are shown in FIG. The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention.

8 and 9 are a perspective view and a cross-sectional perspective view of a gear box according to a third embodiment of the present invention, FIG. 10 is a perspective view of a washer 700 according to the third embodiment of the gearbox according to the present invention, 7 is an exploded perspective view showing a mounting structure of the bolt 710. Fig.

4 to 7, in order to press the bearing 400, the fastening nut 500 is screwed to one side of the first gear shaft 210, That is, one side of the first gear shaft 210 protrudes through the first bevel gear 200. However, when the first gear shaft 21 does not protrude from the bearing 30 as in the conventional gear box, a space for screwing the tightening nut 500 is not ensured, and the tightening nut 500 The bearing 400 can not be pressed.

The gear box according to the present invention can be configured to press the bearing 400 toward the first bevel gear 200 even if one side of the first gear shaft 210 does not protrude through the bearing 400. [ That is, the gear box according to the present invention includes a first bevel gear 200 and a second bevel gear 300 that are gear-engaged at right angles in the gearbox body 100, A first gear shaft 210 and a second gear shaft 310 mounted on the first bevel gear 200 and the second bevel gear 300 and a second bevel gear 210 connected to the second bevel gear 300 of the first bevel gear 200 A washer 700 mounted on the outer surface of the bearing 400, a bearing cap 600 coupled to one side of the gear box to cover the washer 700, And a pressing bolt 710 screwed to the bearing cap 600 so as to press the washer 700 toward the bearing 400.

In the case where the screwing force of the pressing bolt 710 is configured to press the first bevel gear 200 through the washer 700 and the bearing 400, the user rotates the pressing bolt 710 in some direction It is possible to adjust the backlash easily and stably, and it is advantageous in that the existing gear box can be utilized as it is, which is very excellent in applicability. 8 to 10, the backlash is adjusted by the screwing force of the pressing bolt 710, as shown in FIGS. 4 to 7, by adjusting the backlash by the screwing force of the tightening nut 500 Method, and thus a detailed description thereof will be omitted.

When the washer 700 is made of a material having a very high hardness, the washer 700 may be damaged when the pressing bolt 710 presses the washer 700, It is preferable to be made to have elasticity in the thickness direction.

The washer 700 is formed in a ring shape surrounding the first gear shaft 210 so that the screwing force of the pressing bolt 710 can be uniformly applied to each part of the bearing 400, It is preferable that a plurality of washers 710 are provided so as to be radially arranged with the center axis of the washer 700 as a reference,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

100: gearbox body 200: first bevel gear
210: first gear shaft 220: oil chamber
300: second bevel gear 310: second gear shaft
400: Bearing 500: Fastening nut
510: mounting plate 520: fixing bolt
600: Bearing cap 610: Wrench bolt
700: washer 710: pressure bolt

Claims (7)

delete delete delete delete A first bevel gear 200 and a second bevel gear 300 that are gear-engaged at right angles within the gearbox body 100;
A first gear shaft 210 and a second gear shaft 310, one side of which is longitudinally mounted on the first bevel gear 200 and the second bevel gear 300, respectively;
A bearing 400 mounted on the opposite side of the first bevel gear 200 in contact with the second bevel gear 300;
A washer 700 mounted on an outer surface of the bearing 400;
A bearing cap 600 coupled to one side of the gearbox body 100 to cover the washer 700;
A pressing bolt 710 screwed to the bearing cap 600 so as to press the washer 700 toward the bearing 400;
And a backlash adjustable function.
The method of claim 5,
Wherein the washer (700) is made to have elasticity in the thickness direction.
The method of claim 5,
The plurality of pressing bolts 710 are radially arranged with respect to the central axis of the washer 700, and the plurality of pressing bolts 710 are arranged at equal intervals. box.

KR1020160083559A 2016-07-01 2016-07-01 Gear box having backlash adjusting function KR101669571B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109630658A (en) * 2018-12-28 2019-04-16 南京高速齿轮制造有限公司 Train suitable for gear of wind power speed-increasing gearbox carries regulating mechanism
CN109654168A (en) * 2017-10-12 2019-04-19 浙江大发齿轮有限公司 A kind of bevel gear housing
CN109882574A (en) * 2019-03-05 2019-06-14 浙江新昌博时汽车配件有限公司 A kind of gear-box group
CN110657227A (en) * 2019-08-30 2020-01-07 温州职业技术学院 Submerged speed reducer
CN109630658B (en) * 2018-12-28 2024-05-14 南京高速齿轮制造有限公司 Gear train uniform load adjusting mechanism suitable for wind power speed increasing gear box

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960023933A (en) 1994-12-31 1996-07-20 김준성 Backlash Adjusting Device and Method of Bevel Gear
KR20050076326A (en) * 2004-01-20 2005-07-26 한승우 Combination structure of axle assembly
KR20050094955A (en) * 2004-03-24 2005-09-29 주식회사 만도 Backlash adjust structure for eletric power steering system
KR20100094186A (en) * 2009-02-18 2010-08-26 동양기전 주식회사 Hydraulic cylinder apparatus improving loose-proof structure of piston nut
KR20120113900A (en) * 2011-04-06 2012-10-16 권영주 Bevel gear driving type elevated stage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960023933A (en) 1994-12-31 1996-07-20 김준성 Backlash Adjusting Device and Method of Bevel Gear
KR20050076326A (en) * 2004-01-20 2005-07-26 한승우 Combination structure of axle assembly
KR20050094955A (en) * 2004-03-24 2005-09-29 주식회사 만도 Backlash adjust structure for eletric power steering system
KR20100094186A (en) * 2009-02-18 2010-08-26 동양기전 주식회사 Hydraulic cylinder apparatus improving loose-proof structure of piston nut
KR20120113900A (en) * 2011-04-06 2012-10-16 권영주 Bevel gear driving type elevated stage

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109654168A (en) * 2017-10-12 2019-04-19 浙江大发齿轮有限公司 A kind of bevel gear housing
CN109630658A (en) * 2018-12-28 2019-04-16 南京高速齿轮制造有限公司 Train suitable for gear of wind power speed-increasing gearbox carries regulating mechanism
CN109630658B (en) * 2018-12-28 2024-05-14 南京高速齿轮制造有限公司 Gear train uniform load adjusting mechanism suitable for wind power speed increasing gear box
CN109882574A (en) * 2019-03-05 2019-06-14 浙江新昌博时汽车配件有限公司 A kind of gear-box group
CN110657227A (en) * 2019-08-30 2020-01-07 温州职业技术学院 Submerged speed reducer
CN110657227B (en) * 2019-08-30 2021-11-30 温州职业技术学院 Submerged speed reducer

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