KR20110031661A

KR20110031661A - Gear for the backlash removal

Info

Publication number: KR20110031661A
Application number: KR1020090089003A
Authority: KR
Inventors: 브레크니 크리스
Original assignee: 브레크니 크리스
Priority date: 2009-09-21
Filing date: 2009-09-21
Publication date: 2011-03-29
Also published as: WO2011034339A3; WO2011034339A2

Abstract

The present invention relates to a gear for removing the backlash, and more particularly, is connected to one end of the hollow rotating shaft is rotated in the same way, the engaging projection protruding forward in the center is formed but the interior is in communication with the hollow of the rotating shaft A second gear and each first installation are coupled to the first gear and the engaging projection is formed so as to be rotatable, the first gear and a coupling protrusion is formed along the arc and rotatable, the same gear value as the gear value of the first gear Ends of engaging projections of the first gear are provided in the grooves, respectively, so that both ends of the first gear and the second gear are respectively connected to prevent the cylinder and the second gear from rotating in one direction from the first gear. It is composed of a fixing cap provided in.

According to the present invention as described above, the backlash is removed by the first and second gears rotated in the same way as the forward and reverse rotation body, the backlash is removed by removing the gap between the first and second gears This is stable and can be delivered continuously.

Description

Gear for the backlash removal

The present invention relates to a gear, and more particularly, the second gear is rotatably coupled to the front surface of the first gear, and the first gear is provided with a cylinder for rotating the second gear, which is the same as the rotating body which is rotated forward and backward. Backlash is removed as the first and second gears are rotated so that the backlash is eliminated as the gears for removing the backlash can be continuously and reliably transmitted by the first and second gears. It is about.

In general, when a pair of gears are bite, they are theoretically formed to engage between each gear tooth and the tooth groove, but mutual spacing is generated due to the manufacturing error of the gears.

This manufacturing error is not smoothly transmitted due to fluctuations in the center distance, wear or deformation of the teeth or gear shafts due to load, tolerances during assembly, etc. Some gaps, or backlash, will occur.

In other words, this backlash refers to the gap between the gear tooth and the gear tooth in the circumferential direction when the gear is engaged, and there is always a production tolerance because there is no gap between the gear teeth of the same size. Will be done.

Such a backlash is generated when a pair of gears meshed with each other and rotated in one direction is rotated in opposite directions, and there is a problem of increasing stress and wear caused between forward and reverse gears.

When this backlash occurs between the gears, power transmission for driving the optical pickup is mainly performed by the gears in the optical pickup device using a recording medium such as CD or DVD, which is one embodiment that performs forward and reverse rotation. In the power transmission gear of the optical pickup device, the backlash has a great influence on the operation and reliability of the device.

In other words, if the backlash is present in the power transmission gear of the optical pickup device, an error in power transmission occurs, and the pickup flow is caused by an external impact, resulting in the pickup being off the track of the CD or DVD information surface. Playback will not be possible.

Various methods have been developed to solve such problems, and among them, a gear for removing backlash has been developed and used as shown in FIG. 1.

1 is a view illustrating a conventional double backlash removal gear.

As shown in the figure, in the two gears having the same size are coaxially coupled, a support (la) is formed on one side of the upper surface of the lower gear (1), a rectangular side on one side of the upper gear (2) While the groove 2a is formed, the projection 2b is formed on one side wall of the groove, and the compression spring 3 is installed between the support la and the projection 2b of the lower gear 1. It consists of a composition.

In addition, a plurality of locking projections 1b are formed at a plurality of upper surfaces of the lower gear 1, and a guide groove 2c is formed on the surface of the upper gear 2 corresponding to the projection 1b forming portion, so that the guide grooves are formed. The projection 1b is inserted into (2c).

In the conventional double backlash removing gear, the upper gear 2 is pushed in one direction by the elastic force of the spring 3 installed in the groove 2a of the upper gear 2, such an upper gear. The flow of (2) is restricted by the locking projection 1b being caught by one side wall of the guide groove 2c.

Therefore, the elastic force of the spring 3 always acts on the upper gear 2, and the gears of the upper gear 2 and the lower gear 1 are kept in a state of being shifted from each other so that the other gear engaged with the upper gear 2 is upper. Backlash is minimized as both sides of the tooth groove are in close contact with the gear teeth of the upper gear 2 and the lower gear 1 by the spring force acting on the gear 2.

However, the conventional double backlash removal gear has a problem in that the elastic force of the spring 3 that pushes the upper gear 2 in one direction during long term use is lowered, and thus the force that pushes the upper gear 2 continuously is lowered.

This indicates that the lifespan of the conventional double backlash elimination gear is short, and it is inconvenient for the consumer to deteriorate reliability by having to remove the double gear from the product and replace the spring 3 or a new product. do.

Accordingly, the present invention has been made to solve the above problems, the first gear and the first gear having a cylinder to rotate the second gear coupled to the second gear rotatably coupled to the first gear, the first gear Backlash can be eliminated by eliminating gaps with other gears that engage the two gears.

The first pipe for providing pressure to each cylinder is provided through the hollow of the rotating body, and the pressure of each cylinder is discharged, but the length of each cylinder is kept constant as it is connected to each other so that the second gear is operated at the first gear. After rotating in the direction, the state is maintained.

In addition, an object of the present invention is to provide a gear for removing backlash, which may facilitate a state check and repair replacement work of a cylinder by forming a second installation groove corresponding to the first installation groove in the second gear.

The present invention for achieving the above object is a hollow rotating shaft, the same rotation is connected to one end of the rotating shaft, the engaging projection protruding forward in the center portion is formed through the inside so as to communicate with the hollow of the rotating shaft A first gear having a pair of first installation grooves formed along a circular arc, the second gear being coupled to the engaging projection of the first gear and being rotatable, and having the same gear value as the gear value of the first gear, It is provided in each of the first mounting groove, the both ends of the first gear and the second gear is connected to each of the cylinder to rotate the second gear in one direction, and the second gear is separated from the first gear It includes a fixing cap provided on the end of the engaging projection of the first gear to prevent.

Preferably, the first pipe and the second pipe for supplying and discharging pressure to the cylinder is installed through the hollow of the rotating shaft, one end of the first pipe and the second pipe is branched to each of the first cylinder As the branched ends of the pipe and the second pipe are connected one by one, the rod length of each cylinder is kept constant to rotate the second gear in the first gear and then maintain the state.

The cylinder rotates the second gear by hydraulic pressure.

In addition, the second gear is formed with a second installation groove corresponding to the first installation groove of the first gear can check the state of the cylinder provided in the first installation groove, and easy repair and replacement work can do.

And it further comprises a control unit for adjusting the pressure provided to the cylinder in accordance with the gear value of the other gear meshed with the first gear and the second gear to adjust the rotation angle of the second gear.

As described above, according to the gear for removing the backlash according to the present invention, the backlash is removed by removing the gap between the other gears in which the first and second gears that are rotated in the same way as the forward and backward rotating body are engaged. It is a very useful and effective invention that allows the rotational force to be stable and continuously transmitted by the first and second gears.

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

In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only, and various modifications may be made without departing from the technical gist of the present invention.

2 is a view showing a gear for removing backlash according to the present invention, Figure 3 is a view showing a separation of the gear for removing backlash according to the present invention, Figure 4 is a gear for removing backlash according to the present invention. Figure 5 is a view showing a front view, Figure 5 is a view showing the installation state of the gear for removing the backlash according to the invention.

As shown in the figure, the gear 100 for removing the backlash is composed of a rotating shaft 110, the first gear 120, the second gear 130, the cylinder 140 and the fixed cap 150, The rotating shaft 110 is rotated by the transmitted power, and a hollow is formed therein.

In addition, the first gear 120 is provided at the end of the rotation shaft 110 and rotated in the same manner, and the engaging protrusion 122 protrudes forward from the center portion thereof.

The second gear 130 is coupled to the coupling protrusion 122, and a coupling hole 132 corresponding to the coupling protrusion 122 is formed at the second gear 130 to be coupled to the first gear 120. .

At this time, the first gear 120 is formed with a through-hole communicating with the hollow of the rotating shaft 110, the through-hole is formed through the central portion of the coupling protrusion 122.

The hollow of the rotating shaft 110 and the through hole of the first gear 120 are passages provided with the first pipe 144 of the cylinder 140, and provide pressure to the cylinder 140 to provide the second gear 130. After rotating in one direction, the state is maintained.

The first gear 120 has a pair of first installation grooves 124 formed along an arc, and the cylinders 140 are provided in the first installation grooves 124, respectively.

The rod 142 of the cylinder 140 is fixed to the second gear 130 to rotate the second gear 130 from the first gear 120, the first provided along the hollow of the rotating shaft 110 The second gear 130 is rotated by the pressure provided and discharged by the first pipe 144 and the second pipe 146.

The first pipe 144 and the second pipe 146 is branched and connected to each cylinder 140, each cylinder 140 has one branched end of the first pipe 144 and the second The length of the rod 142 changes as one branched end of the tube 146 is connected to supply and discharge pressure to the cylinder 140.

In other words, each cylinder 140 is operated in the same way by the first pipe 144 and the second pipe 146, one end of which is branched, and maintains the state after a certain angle of rotation.

Such a change in length of the cylinder rod 142 rotates the second gear 130 based on the central axis of the first gear 120 to rotate the second gear 130 in accordance with the gear tooth spacing of the other gears to be engaged. As a result, the gear tooth of the second gear 130 is brought into contact with the gear tooth of another gear to be engaged.

This is because when the first gear 120 and the second gear 130 is engaged with other gears and rotates, the pressure of the first pipe 144 and the second pipe 146 is adjusted to remove backlash. It is possible to easily maintain the rotation state of the second gear 130, so that it is possible to transmit the rotational force to the other gears as in the first gear (120).

In this case, the cylinder 140 rotates the second gear 130 in the forward direction or the reverse direction by hydraulic pressure, and in some cases, pneumatic pressure may be used.

Looking at the installation of the cylinder 140, the first tube 144 and the second tube 146, the first tube 144 and the second tube 146 is installed through the hollow of the rotating shaft 110 The ends of the first tube 144 and the second tube 146 are bifurcated.

Each branch of the branched first pipe 144 and the second pipe 146 is installed along the rear surface of the first gear 120 at the end of the rotating shaft 110, a pair of first mounting groove 124 It is connected to each cylinder 140 installed in the, the pair of cylinders 140 are operated in the same manner as the pressure is supplied through the first pipe 144 and the pressure is discharged through the second pipe 146. 2 gear 130 is rotated.

The second gear 130 is rotated in the opposite direction by the supply through the second pipe 146 and the discharge through the first pipe (144).

As the cylinder 140 fixes the second gear 130 to the first gear 120 as the pressure of the first pipe 144 and the second pipe 146 is maintained in such a rotating state, the first gear The rotational force may be transmitted to another gear that is rotated and engaged with the same as 120.

On the other hand, the cylinder 140, the first pipe 144 and the second pipe 146 to look at another installation example, the first pipe 144 and the second pipe 146 is the hollow shaft of the rotating shaft 110 It is connected to each cylinder 140 through the through-hole of the first gear 120 and the fixed cap 150.

At this time, the second gear 130 is formed with a second mounting groove 134 corresponding to the first mounting groove 124 of the first gear 120, to check the state of the installed cylinder 140, or repair And to facilitate the replacement operation.

The second installation groove 134 of the second gear 130 is the first pipe 144 through the through hole of the first gear 120 and the fixing cap 150 in another installation example of the first pipe 144. It is connected to the cylinder 140 through the second installation groove 134 of the second gear 130.

On the other hand, the fixing cap 150 is fixed to the end of the engaging projection 122 of the first gear 120, there is formed a through-hole communicating with the through-hole of the first gear (120).

The fixing cap 150 is provided to prevent the second gear 130, which is rotatably coupled to the coupling protrusion 122 of the first gear 120, from being separated or separated from each other. It is used for installation of the first pipe 144 according to another installation example of 144.

In addition, the fixing cap 150 in another installation example of the first pipe 144, a portion of the first pipe 144 and the second pipe 146 is fixed to the first gear 120 and the rotating shaft 110 It can be rotated the same as.

The fixing cap 150 is fixed to the end of the coupling protrusion 122 of the first gear 120 by a separate fixing member (not shown).

And a control unit 160 for adjusting the pressure provided to the cylinder 140 according to the gear values of the other gears meshed with the first gear 120 and the second gear 130. It is desirable to adjust the rotation angle.

This is to effectively remove the backlash by confirming the gear pitch of another gear engaged with the gear 100 for removing the backlash.

1 is a view showing a double gear for removing the conventional backlash,

2 is a view showing a gear for removing the backlash according to the present invention,

3 is a view showing a separation of the gear for removing the backlash according to the invention,

Figure 4 is a view showing a front view of the gear for removing the backlash according to the invention,

5 is a view illustrating an installation state of a gear for removing backlash according to the present invention.

100: gear 110: rotating shaft

120: first gear 122: engaging projection

124: first mounting groove 130: second gear

132: coupling hole 134: second installation groove

140: cylinder 142: rod

144: Hall 1 146: Hall 2

150: fixed cap 160: control unit

Claims

Hollow rotating shaft;

Is connected to one end of the rotation shaft is rotated in the same way, the engaging projection is formed to protrude forward in the center portion is formed through the through hole to communicate with the hollow of the rotation shaft, a pair of first installation grooves are formed along the arc First gear;

A second gear coupled to the engaging projection of the first gear, the second gear being rotatable and having the same gear value as the gear value of the first gear;

Cylinders respectively provided in the first installation grooves, each end of which is connected to the first gear and the second gear to rotate the second gear in one direction; And

And a fixing cap provided at an end portion of the coupling protrusion of the first gear to prevent the second gear from being separated from the first gear.

The method of claim 1,

First and second pipes for supplying and discharging pressure to the cylinder are installed through the hollow portion of the rotation shaft, and one end of the first pipe and the second pipe are branched, respectively, so that the first pipe and the first pipe As the branched ends of the two pipes are connected one by one, the rod length of each cylinder is kept constant to rotate the second gear in the first gear, and then maintain the state.

The method according to claim 1 or 2,

The cylinder is a gear for removing backlash, characterized in that for rotating the second gear by hydraulic pressure

The method of claim 1, wherein the second gear,

The second mounting groove corresponding to the first mounting groove of the first gear is formed to check the state of the cylinder provided in the first mounting groove, it is easy to repair and replace the backlash, characterized in that Gears for removal.

The method of claim 1,

And a control unit for adjusting the pressure provided to the cylinder according to the gear value of the other gear meshed with the first gear and the second gear to adjust the rotation angle of the second gear. Gear.