KR20170075263A - Apparatus for adjusting back lash of gear for transfer - Google Patents

Apparatus for adjusting back lash of gear for transfer Download PDF

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Publication number
KR20170075263A
KR20170075263A KR1020150184693A KR20150184693A KR20170075263A KR 20170075263 A KR20170075263 A KR 20170075263A KR 1020150184693 A KR1020150184693 A KR 1020150184693A KR 20150184693 A KR20150184693 A KR 20150184693A KR 20170075263 A KR20170075263 A KR 20170075263A
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KR
South Korea
Prior art keywords
stopper
gear
case
driving gear
bearing
Prior art date
Application number
KR1020150184693A
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Korean (ko)
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KR101764028B1 (en
Inventor
김강문
Original Assignee
현대다이모스(주)
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Priority to KR1020150184693A priority Critical patent/KR101764028B1/en
Publication of KR20170075263A publication Critical patent/KR20170075263A/en
Application granted granted Critical
Publication of KR101764028B1 publication Critical patent/KR101764028B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02Toothed members; Worms
    • F16H55/17Toothed wheels
    • F16H55/18Special devices for taking up backlash
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02Toothed members; Worms
    • F16H55/17Toothed wheels
    • F16H55/18Special devices for taking up backlash
    • F16H55/20Special devices for taking up backlash for bevel gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/02Gearboxes; Mounting gearing therein
    • F16H57/021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F16H57/022Adjustment of gear shafts or bearings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

The present invention relates to a gear backlash adjuster of a transfer type in which stopper grooves 120 and 220 are formed on inner surfaces 110 and 120 of a front case 100 and a rear case 200 adjacent to bearings 400 on both sides of a driving gear 300 And the stopper 500 is screwed into the stopper grooves 120 and 220 to adjust the position of the stopper 500 so that the axial position of the drive gear 300 is adjusted, Can be adjusted.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gear-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear backlash adjuster for a transfer, and more particularly, to a gear backlash adjuster for a transfer which can easily adjust a backlash between a drive gear and a driven gear.

The transfer of a four-wheel drive vehicle is a device that distributes the engine power transmitted to the rear wheels to the front wheels.

If the driving forces of the front wheels and the rear wheels are appropriately distributed according to the road surface condition and the running state, the vehicle can be driven more stably.

1 shows an example of a transfer according to the prior art.

The rear output shaft 17 and the front output shaft are spaced apart from each other. A drive gear 21 is mounted on the rear output shaft 17 in a freely rotatable state. A driven gear 15 is integrally formed on the front output shaft. And the drive gear 21 and the driven gear 15 are meshed with each other.

The main clutch 23, the ball ramp 33, 35 and 37 and the pilot clutch 27 are provided on one side of the drive gear 21 and the operation cylinder 75 and the electromagnet 71 And an armature 73 are provided.

The clutch drum of the main clutch 23 is installed to rotate integrally with the drive gear 21 and the clutch hub is installed to rotate integrally with the rear output shaft 17. [

The operating cylinder 75 and the armature 73 are mutually connected to move integrally in the axial direction.

When the electromagnet 71 is magnetized, the armature 73 is pulled toward the electromagnet 71 to push the actuating cylinder 75, the actuating cylinder 75 presses and connects the pilot clutch 27, and the pilot clutch 27 The ball ramp 33, 35, 37 is extended, and the main clutch 23 is pressed and connected.

The rotational force of the rear output shaft 17 is transmitted to the driving gear 21 through the main clutch 23 so that the driving gear 21 is rotated so that the driven gear 15 is rotated to the front wheel through the front output shaft The driving force is transmitted.

A part of the driving force transmitted to the rear wheels may be transmitted to the front wheels to travel in the four-wheel drive state.

On the other hand, as described above, the transfer gear includes the driving gear 21 and the driven gear 15, which are engaged with each other. Therefore, there is a back lash problem between the gears.

If the backlash is too small, the interdental friction becomes large and wear occurs. If the backlash is too large, the gear is likely to be damaged due to the impact between the teeth. In both cases, vibration and noise are generated. Therefore, a suitable size of rack lash is required to smoothly rotate the pair of gears.

However, since there is no means for adjusting the backlash of the drive gear and the driven gear in the conventional transfer, it is impossible to cope with the case where the backlash is not appropriate. Therefore, the wear and breakage of the gear, There was a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gear backlash adjuster of a transfer which can easily adjust a backlash of a drive gear and a driven gear.

According to an aspect of the present invention, there is provided a rear output case including a front case and a rear case, which are coupled to each other and have a shaft hole through which a rear output shaft is inserted, A driven gear which is installed in a space between the front case and the rear case and is integrally rotated with the front output shaft and is engaged with the driving gear, A bearing disposed between the inner surface of the protrusion and the inner surface of the front case shaft hole and between the inner surface of the rear case protrusion of the drive gear hub and the inner surface of the rear case shaft hole, a stopper groove formed in the inner surface of the front case and the rear case, And an inner stopper groove And a female screw is formed, and a male screw is formed on the outer peripheral surface of the stopper, it characterized in that the stopper is screwed into the stopper groove.

A step is formed between the hub and the front projection of the drive gear and between the hub and the rear projection so that the bearing is in close contact with the hub.

The stopper grooves of the front case inner diameter surface are provided forward of the adjacent bearings, and the stopper grooves of the inner case surface of the rear case are disposed behind the adjacent bearings.

A plurality of shims are fitted between the stopper and an adjacent bearing.

A plurality of turning grooves used for rotating the stopper by inserting a tool into the side surface of the stopper are formed.

The stopper may be a snap ring.

One of the driving gear and the driven gear is a beveloid gear.

According to the present invention as described above, it is possible to easily adjust the backlash of the drive gear and the driven gear of the transfer.

Therefore, when a problem occurs due to a backlash failure, the backlash adjustment operation can be performed immediately in response to the problem.

When proper backlash is formed through backlash adjustment, it is possible to prevent abrasion, breakage, vibration and noise of the driving gear and the driven gear.

Further, the present invention has the effect of minimizing the disassembly of the transfer during the backlash adjustment operation.

1 is a view showing a transfer structure of a four-wheel drive vehicle according to the prior art.
2 is a configuration diagram of a transfer gear backlash adjusting device according to the present invention.
3 is a view showing another embodiment of the transfer gear backlash adjustment device.
4 is a front view of the stopper used in the embodiment of Fig. 3;

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a configuration diagram of a gear backlash adjustment device of a transfer according to the present invention. The present invention includes a bearing 400 for supporting the drive gear 300 in a rotatable state, A stopper 500 inserted into the stopper groove and a plurality of shims 600 sandwiched between the bearings 400 and the stopper 500. The stopper 500 includes a stopper 500 formed in the stopper groove,

The case includes a front case 100 and a rear case 200, both of which are coupled with bolts.

A driving gear 300 and a driven gear engaged therewith are installed in a space formed inside the front case 100 and the rear case 200. 2 shows a portion where the dual drive gear 300 is installed.

The front case 100 and the rear case 200 are formed with a shaft hole H through which a rear output shaft for transmitting the driving force inputted from the transmission to the rear-wheel-side propeller shaft is inserted.

The inner case 110 and the inner case 110 of the front case 100 and the rear case 200 constitute the shaft hole H. [

The front projection 310 and the rear projection 320 are formed on both sides of the hub of the driving gear 300 mounted on the rear output shaft.

The front protrusion 310 and the rear protrusion 320 are supported by bearings 400, respectively. That is, bearings 400 are provided between the inner surface 110 of the front case 100 and the front protruding portion 310, and between the inner surface 210 of the rear case 200 and the rear protruding portion 320 The drive gear 300 is rotatably supported with respect to the case.

A step is formed between the hub and the front protruding portion 310 and between the hub and the rear protruding portion 320 so that the bearings 400 are in close contact with the wall surface of the step. Therefore, when the bearing 400 is axially pushed, the position of the driving gear 300 can be moved integrally with the bearing 400. [

On the other hand, ring-shaped stopper grooves 120 and 220 are formed on the inner circumferential surfaces 110 and 210 of the front case 100 and the rear case 200, respectively, in the circumferential direction.

The stopper grooves 120 and 220 are formed adjacent to the bearing 400. [ In the case of the front case 100, a stopper groove 120 is formed in front of the bearing 400 (the left side in the figure is the front side where the transmission is connected and the right side is the rear side to which the rear wheel side propeller shaft is connected) 200, a stopper groove 220 is formed behind the bearing 400.

A ring-shaped stopper 500 is inserted into the both stopper grooves 120 and 220. The inner diameter side portion of the stopper 500 must protrude from the stopper grooves 120 and 220 toward the center of the shaft hole H. [

The stopper 500 may use a snap ring to facilitate insertion and installation into the stopper grooves 120 and 220.

A plurality of shims 600 are fitted in the gap between the stopper 500 and the adjacent bearings 400. The clearance between the bearing 400 and the stopper 500 is completely filled by the shim 600. Therefore, the movement of the driving gear 300 in the axial direction is suppressed, so that the coupling state of the driving gear 300 and the driven gear is stably maintained in the normal use state.

3, female screws 130 and 230 may be formed on the inner circumferential surface of the stopper grooves 120 and 220. On the other hand, a male screw 510 can be formed on the outer circumferential surface of the stopper 500. Accordingly, the stopper 500 can be screwed into the stopper grooves 120 and 220, so that the stopper 500 can move in the forward and backward directions when rotating.

In order to facilitate the rotation operation of the stopper 500, as shown in FIG. 4, a plurality of rotation grooves 520 may be formed on the inner peripheral surface side portion of the stopper 500. The rotary grooves 520 are formed at regular intervals over the entire circumferential direction of the stopper 500 as concave grooves that allow the stopper 500 to be rotated by applying a special tool.

Reference numeral 530 denotes a shrinking hole used to reduce the diameter of the snap ring when the stopper 500 is in the shape shown in the figure, such that the both ends of the snap ring are engaged with each other.

In order to adjust the backlash between the driving gear 300 and the driven gear by moving the driving gear 300 in the axial direction, either the driving gear 300 or the driven gear must be a beveloid gear.

The beveloid gear has a conical shape with an outer peripheral surface inclined and having a small diameter portion and a large diameter portion, and has a feature that the thickness of the gear increases from the small diameter portion to the large diameter portion. Since the thickness of the gear is linearly variable as described above, when one of the beveloid gear or the mated gear is moved in the axial direction, the backlash with the mated gear is changed (increased or decreased).

The operation and effect of the present invention will now be described.

When it is judged that a problem arises due to a backlash between the driving gear 300 and the driven gear, a desired number of padding 600 in a direction in which the driving gear 300 is to be moved is removed, The opposite bearing 400 is moved in a direction to move the entire driving gear 300 and the both bearings 400. [

The removed shims 600 are inserted into the space of the opposing circumferential teeth portion (gap between the bearings and the stoppers) increased by the movement of the driving gear 300 and the bearing 400 so that the driving gear 300 and the bearing 400 Fix the axial movement.

As described above, according to the present invention, by reversing the axial position of the driving gear 300 by removing the one-side shim 600 and inserting the one-side shim 600 into the opposite thimble portion, the backlash between the driving gear 300 and the driven gear can be easily adjusted .

In addition, in addition to moving the position of the shim 600 as described above, the axial position of the driving gear 300 can be moved by moving the position of the stopper 500 as well. To this end, a male thread 510 and female threads 130 and 230 are formed on the outer circumferential surface of the stopper 500 and the inner circumferential surface of the stopper grooves 120 and 220, respectively, and are screwed to each other.

In order to facilitate the operation of rotating the stopper 500, a plurality of rotation grooves 520 are formed on the side surface of the stopper 500.

Therefore, when the stopper 500 is rotated by inserting a tool into the rotary groove 520, the stopper 500 is advanced or retracted in the rotation direction by the action of the male screw 510 and the female screws 130 and 230, The position can be adjusted to adjust the backlash.

If the position of the stopper 500 is adjusted in addition to the adjustment of the number of the shims 600 and the mounting position as described above, the axial position of the driving gear 300 can be adjusted more precisely, The backlash between the gear 300 and the driven gear can be adjusted more precisely.

As described above, according to the present invention, since the backlash of the drive gear and the driven gear of the transfer can be easily adjusted, when a problem occurs due to a backlash defect, the backlash can be adjusted immediately.

Therefore, abrasion, breakage, vibration, and noise of the driving gear and the driven gear due to the backlash failure can be prevented.

On the other hand, a cover case module including parts such as a multi-plate clutch and a piston is mounted to the rear of the rear case 200. The cover case module is bolted to the rear case 200. [

Therefore, when the cover case module is removed, the shim 600 and the stopper (not shown) on both sides of the driving gear 300 through the both side openings (shaft holes H) without separating the front case 100 and the rear case 200 500 can be easily operated. As described above, the present invention is advantageous in that the backlash adjustment operation of the drive gear and the driven gear can be performed without disassembling the transfer as much as possible.

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 embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: front case 200: rear case
110, 210: inner diameter surface 120, 220: stopper groove
130,230: Female thread 300: Drive gear
310: front protrusion 320: rear protrusion
400: Bearing 500: Stopper
510: Male thread 520: Swivel groove
530: Shrinkable hole 600: Shim

Claims (7)

A front case and a rear case, which are mutually coupled and formed with a shaft hole through which a rear output shaft is inserted,
A driving gear installed in a space between the front case and the rear case and installed to be rotatable and axially movable on a rear output shaft,
A driven gear which is installed in a space between the front case and the rear case and is integrally rotated with the front output shaft and engages with the driving gear,
A bearing installed between a front projection of the driving gear hub and an inner diameter surface of the front case shaft hole and between a rear projection of the driving gear hub and an inner diameter surface of the rear case shaft hole,
A stopper groove formed on the inner surface of the front case and the rear case,
And a stopper inserted into the stopper groove,
Wherein a female screw is formed on an inner circumferential surface of the stopper groove and a male screw is formed on an outer circumferential surface of the stopper so that the stopper is screwed into the stopper groove.
The method according to claim 1,
Wherein a step is formed between the hub and the front projection of the driving gear and between the hub and the rear projection so that the bearing closely contacts the gear.
The method according to claim 1,
Wherein a stopper groove on the inner surface of the front case is disposed forward of the adjacent bearing and a stopper groove on the inner circumferential surface of the rear case is disposed behind the adjacent bearing.
The method according to claim 1,
Further comprising a plurality of shims fitted between the stopper and an adjacent bearing.
The method according to claim 1,
And a plurality of rotation grooves used to rotate the stopper by inserting a tool into the side surface of the stopper.
The method according to any one of claims 1 to 5,
Wherein the stopper is a snap ring.
The method according to claim 1,
Wherein one of the drive gear and the driven gear is a beveloid gear.

KR1020150184693A 2015-12-23 2015-12-23 Apparatus for adjusting back lash of gear for transfer KR101764028B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150184693A KR101764028B1 (en) 2015-12-23 2015-12-23 Apparatus for adjusting back lash of gear for transfer

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Application Number Priority Date Filing Date Title
KR1020150184693A KR101764028B1 (en) 2015-12-23 2015-12-23 Apparatus for adjusting back lash of gear for transfer

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KR20170075263A true KR20170075263A (en) 2017-07-03
KR101764028B1 KR101764028B1 (en) 2017-08-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101996176B1 (en) * 2018-07-02 2019-07-03 현대위아 주식회사 Gear backlash adjuster for car active transfer case

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4698358B2 (en) * 2005-09-21 2011-06-08 Gknドライブラインジャパン株式会社 Power transmission device
JP2008169899A (en) * 2007-01-11 2008-07-24 Ntn Corp Wheel bearing device
JP6194241B2 (en) * 2013-12-16 2017-09-06 ナブテスコ株式会社 Gear transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101996176B1 (en) * 2018-07-02 2019-07-03 현대위아 주식회사 Gear backlash adjuster for car active transfer case

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