KR100986802B1 - Decelerate of dual lead worm as possible fine control of back-lash - Google Patents

Abstract

The present invention relates to a dual-lead worm reducer capable of fine-adjusting backlash, wherein the center pitch of the worm screw portion, the dimension of the sound rod, and the dimension of the substitute lead are different from each other, so that the acid thickness of the worm screw portion becomes thicker in one direction. Dual lead worm shafts; A dual lead worm wheel having a central pitch such as the dual lead worm shaft and a worm screw portion of a sound lead and a large lead and engaged with the dual lead worm shaft; A fine-tuning housing configured to allow the dual-lead worm shaft to move linearly while rotating on the motor shaft of the motor by manual operation of being axially coupled to one side of the dual-lead worm shaft; A motor spaced to be coupled to the other side of the dual lead worm shaft so that the dual lead worm shaft can move straight along the motor axis direction; And a case accommodating the dual lead worm shaft and the worm wheel. The abnormal backlash of the worm wheel is to be finely adjusted continuously and finely, and by such a fine adjustment, the life of the worm reducer can be precisely extended and stable power transmission can be achieved.

Worm reducer, worm shaft, worm wheel, dual lead, backlash, fine tuning housing, motor

Description

Dual-Lead Worm Reducer with Backlash Fine-Tuning {DECELERATE OF DUAL LEAD WORM AS POSSIBLE FINE CONTROL OF BACK-LASH}

The present invention relates to a dual-lead worm reducer capable of fine-adjusting backlash, and in detail, by axially coupling a fine-adjusting housing to the worm shaft of the dual-lead worm shaft and the worm wheel, a worm comprising a worm gear set of the dual-lead worm shaft and the worm wheel. Fine adjustment of backlash of abnormal gap spacing caused by abrasion by continuous use of reducer, so that the dual-lead worm shaft can move straightly by rotating the microadjustment housing to maintain the normal gap spacing backlash. This relates to a possible dual lead worm reducer.

In general, if both gears are the same size, there is a gap in order to smooth the rotation operation because it is tight and the rotation operation is not good. Because of this, there is an input and an output in the gear and the backlash ( It is called back-lash and it is formed in all gear combinations.

Recently, there are many cases in which high-tech fields such as semiconductors require precision and efficient precision machines and parts. Among these precision machines and parts, gear combinations in which gears mesh with each other for precise and precise operation are rotated. The backlash is basically formed in the gear combination, and the backlash is essentially a backlash of an abnormal clearance gap in which the teeth of the gear are worn out by the continuous use of the gear combination, thereby increasing the clearance. Follows.

Therefore, in order to solve the problem of abnormal backlash in which the gap between gears interlocked with each other is applied, dual gaps having different leads of gear teeth are applied to each other to further increase the gap gap due to wear. The backlash of abnormal gap spacing is continuously adjusted to make backlash of normal gap spacing which reduces gap spacing.

However, since the gears of the precision machine and parts as described above are applied only to very precise and sophisticated parts, the dual leads are extremely limited in the combination of worm gears of a small amount of precision machine and parts, but the high speed rotation by the motor is performed at low speed. It is not yet applied to the reducer of the general gear combination for converting.

Furthermore, the worm reducer, which consists of a worm gear set of interlocking worm shafts and worm wheels, is highly precise and precise because it requires thorough calculations and sophisticated processing and design from the initial machining to the finish, compared to the general reduction gears of the general gear combinations. It is more difficult to apply the dual lead as a sophisticated technology, and therefore, fine adjustment of the backlash when applying the dual lead is not naturally performed in the worm reducer.

In other words, the dual-lead worm gear type, which is mainly used in machine tools, semiconductor testers, and processing equipment, is used in only one part of precision machines in Japan, Germany, Switzerland, etc. No company develops, sells, or commercializes them.

Therefore, the dual-lead technology is currently used only in a small amount of machine tools as a precision machine, but if it is activated to a place such as a worm reducer, the possibility of use in various kinds of advanced and precision machines such as semiconductor equipment and medical equipment is sufficiently examined. As it is becoming more advanced, diversified and simplified, there is a good chance that it will become a key part in the precision machinery parts market.

The present invention has been made to improve the above-mentioned problems, and its object is to achieve a dual tolerance of zero with a accumulated tolerance of different worm screw leads in the worm shaft and the worm wheel, which are worm gear set combinations of the worm reducer. While applying, the backlash fine adjustment that can make the backlash of the abnormal gap spacing caused by the continuous use of the worm reducer at any time to the backlash of the normal gap spacing by the adjustment of the fine adjustment housing axially coupled to the worm shaft To provide a possible dual-lead worm reducer.

In order to achieve the object as described above, the dual-lead worm reducer capable of fine-adjusting the backlash of the present invention includes a center pitch (ie, a distance between the centers of the mountains 7 and the mountains facing each other of the worm screw unit 1 formed of a hill and a valley ( Between the dimension of 2) and the point where the left pitch face 8a1 of the peak meets the reference pitch line PL and the point 3a where the left pitch face 8a2 of the peak meets the reference pitch line PL. Of the sound 3, which is the distance between the points, the point 4a where the right pitch surface 8b1 of the peak meets the reference pitch line PL, and the right pitch surface 8b2 of the next peak and the reference pitch line ( A dual-lead worm shaft 10 in which the dimensions of the large lead 4, which are the distance between the points 4a where PL) meet, differ from each other, so that the thickness of the acid 7 increases in one direction; A dual lead worm wheel 11 having a central pitch such as the dual lead worm shaft 10 and a worm screw portion of a sound lead and a large lead and engaged with the dual lead worm shaft 10; A motor 13 axially coupled to one side of the dual lead worm shaft 10 so as to allow the dual lead worm shaft 10 to flow along the motor shaft direction; The dual lead worm shaft 10 is rotated on one side of the dual lead worm shaft 10 so that the dual lead worm shaft 10 can move straight along the motor shaft direction while rotating on the motor shaft of the motor 13. Fine-tuning housing 2; And a case (9) accommodating the dual lead worm shaft (10) and the worm wheel (11), and the rotational linear movement of the dual lead worm shaft (10) according to the rotation adjustment of the fine adjustment housing (12). It is characterized in that the abnormal backlash of the dual-lead worm shaft 10 and the worm wheel 11, which is worn while being used, and the gap is further opened, can be finely adjusted continuously and finely.

In addition, the worm screw portion 1 of the worm gear set in which the worm shaft 10 and the worm wheel 11 are engaged with each other has a center pitch 2, a sound lead 3, and a large lead 4 having a large lead> center pitch. It is preferable that the dual leads have a difference in size in order of >

In addition, the dual lead worm shaft 10 is a special steel, the dual lead worm wheel 11 is ALBC aluminum alloy, the case 9 is preferably cast iron.

According to the dual-lead worm reducer capable of fine-adjusting the backlash of the present invention, the dual-lead worm reducer enables fine adjustment of the backlash in the worm reducer. There is an effect to increase.

In addition, there is an effect of improving the product reliability of the worm reducer by the continuous adjustment of the continuous backlash of the dual-lead worm reducer, the service life of the dual-lead worm reducer is significantly longer than the general worm reducer is preferable in terms of economic It works.

As such, the dual-lead worm reducer has great economic feasibility in products, but if parts value alone is known to domestic and global markets, it will have a significant effect.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of a dual-lead worm reducer capable of fine-tuning the backlash according to the present invention will be described in detail. The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only this embodiment to make the disclosure of the present invention complete and to those skilled in the art to fully understand the scope of the invention It is provided to inform you.

1 is a side view of a dual lead worm shaft used in a dual lead worm reducer according to the present invention, Figure 2 is an enlarged view of the worm screw portion of the dual lead worm shaft used in the dual lead worm reducer according to the present invention. .

1 and 2, the worm shaft 10 of the worm reducer according to the present invention is characterized in that the worm screw portion 1 is formed of a dual lead.

The dual lead is the dimension of the center pitch (2) which is the distance between the peak (7) and the center of the mountain facing each other of the worm screw portion (1) consisting of a peak and a valley in the worm shaft (10), and the left pitch surface of the peak Solead which is the distance between the point 3a where 8a1 and the reference pitch line PL meet and the point 3b where the left pitch surface 8a2 of the next mountain meets the reference pitch line PL. (3), the point 4a where the right pitch surface 8b1 of the peak meets the reference pitch line PL, and the point 4b where the right pitch surface 8b2 of the next peak meets the reference pitch line PL. The distance between the large lead (大 lead) (4) is different from each other.

For example, if the size of the center pitch, the size of the sound rod, and the size of the large lead are different from each other so that the size decreases in the order of the large lead <center pitch <sound rod, and the worm screw part is processed with such a difference in dimensions, The worm screw portion 1 of the dual lead worm shaft 10 is formed of a dual lead in which the thickness of the peak 7 becomes thicker from the left to the right as shown in the drawing, and each dimension of the dual lead worm shaft 10 It can vary depending on the size and type.

The dual lead worm shaft 10 is the most stable to use the special steel material SCM415, this material has the advantage of excellent hardness and strength, particularly tensile strength.

Meanwhile, although not shown, in the worm gear set in which the dual lead worm shaft 10 and the worm wheel 11 are engaged with each other, the worm screw portion of the worm wheel 11 is also formed as a dual lead as described above. It is not the reference pitch line PL but the pitch circle diameter (PCD), that is, the pitch circle diameter, which meets the pitch surface of the large lead.

The dual lead worm wheel 11 is stable to use ALBC made of aluminum alloy material, this material has a good condition as a worm wheel material, as well as good tensile strength and sliding.

3 is a longitudinal sectional view and a left and right side view of the microadjustment housing used in the dual lead worm reducer according to the present invention, and FIG. 4 is a perspective view of the microadjustment housing used in the dual lead worm reducer according to the present invention.

As shown in Figures 3 and 4, the fine adjustment housing 12 is a hollow flange formed with the end circumferential wing portion 5 and the intermediate circumferential wing portion 6 on the outer circumferential surface of one end portion and the middle portion, respectively; As a result, the bolt holes 5a having tabs are formed on the circumferential surfaces of the end circumferential wing portions 5, and wrench bolt holes 6b are formed on all sides of the intermediate circumferential wing portions 6, and the wrench bolts are formed. In the position between the balls (6b) is formed with a wrench wrench bolt hole (6a) having a tab for fine adjustment, and will be later coupled to the other side of the worm shaft 10, that is, the left side in the figure.

5 is a side view and a longitudinal sectional view of the dual lead worm reducer according to the present invention based on the AA line shown in the right side view of the fine adjustment housing of FIG. 3, and FIG. 6 is a right side view of the fine adjustment housing of FIG. A side view and a longitudinal sectional view of a dual lead worm reducer according to the present invention based on the BB line shown in FIG.

5 and 6, the dual lead worm reducer according to the present invention, the case 9, the dual lead worm shaft 10, the dual lead worm wheel 11, fine-tuning housing 12, and the motor ( 13).

The case 9 accommodates the dual-lead worm shaft 10 and the like except for the motor 13, and a cast iron (FCD) is generally used as the material, and the disadvantage is that the material is crude and heavy. However, it is stable in ambient environment, temperature, air pressure and tensile strength.

The dual lead worm shaft 10 has a worm screw 1 having a dual lead as described above. The dual lead worm shaft 10 has a worm wheel 11 in which a worm screw part is formed of dual leads. It is a set.

The fine adjustment housing 12 is wrench bolt 14 through the wrench bolt hole 6b formed in the intermediate circumferential wing 6 while being axially coupled to the other side of the dual lead worm shaft 10, that is, the left side in the drawing. Is inserted and coupled to the case (9), and through the mood wrench bolt hole (6a) is inserted without tightening the headless moodless bolt 15 for fine adjustment.

The motor 13 is axially coupled to one side of the dual lead worm shaft 10 through a motor shaft, that is, the right side in the drawing to rotate the dual lead worm shaft 10 at high speed, and the dual lead worm shaft 10 is When the motor 13 rotates at a high speed, the dual lead worm wheel 11 engaged with the dual lead worm shaft 10 rotates at a low speed to serve as a speed reducer.

At this time, the dual-lead worm shaft 10 is axially coupled to the motor shaft of the motor 13 has a play according to the type and size (minimum 3mm, maximum 15mm) for fine adjustment while rotating along the motor shaft It is axially coupled to move straight from side to side.

Meanwhile, the cover 18 having the bolt hole formed at the end of the fine adjustment housing 12 is covered to the bolt 17 through the bolt hole 5a formed at the end circumferential wing 5 of the fine adjustment housing 12. Is fastened.

The process of finely adjusting the backlash using the dual-lead worm reducer of the present invention configured as described above will be described in detail.

First, the dual-lead worm reducer maintains the normal backlash between the dual-lead worm shaft 10 and the worm wheel 11 that are engaged with each other for a predetermined time during use, but when the dual-lead worm reducer is used for a long time longer than a predetermined time, the dual-lead The thicker portion of the worm shaft portion 1 of the worm shaft 10 and the worm wheel 11 becomes thinner due to abrasion, and in this portion, the worm gear set of the dual lead worm shaft 10 and the worm wheel 11 The gap between the teeth of the worm screw portion 1 formed in the opening is increased a lot to achieve an abnormal backlash.

In this abnormal backlash state, since the dual lead worm shaft 10 and the worm wheel 11 are engaged with the worm reducer in operation, the normal backlash should be made.

The normal or abnormal backlash may be manually rotated on the dual lead worm shaft 11 on the dual lead worm shaft 10 even when a general worker is in the stationary state of the dual lead worm wheel 11, so that the dual lead worm wheel 11 has a gap, that is, the backlash. You can feel the movement by and judge easily.

Therefore, after loosening the wrench bolt 14 of the fine adjustment housing 12 and dismantling it with the case 9, turning one of the mood wrench bolts 15 of the fine adjustment housing 12 with a wrench, The dual lead worm shaft 10, which is axially coupled to the fine adjustment housing 12 while rotating the entire mood wrench bolt 15, rotates on the motor shaft of the motor 13 to perform a fine straight movement from side to side. The gap between the gap between the dual lead worm shaft 10 and the worm screw part 1 formed on the worm wheel 11 is maintained by the gap between the gaps due to the minute straight movement. The gap becomes narrower.

As described above, when the gap is gradually narrowed, even when a general worker rotates the dual lead worm wheel 11 manually while maintaining the gap distance of the normal backlash, the dual lead worm wheel 11 is moved by the normal backlash. Since it can feel and know, the minute adjustment of the backlash is completed by stopping the rotation of the wrench bolt 15 at that moment.

Since the fine adjustment of the backlash can be carried out continuously until the acid thickness of the dual-lead worm shaft 10 and the worm screw portion 1 of the worm wheel 11, which is thicker, reaches a certain limit due to wear, the worm reducer As the life span of the is extended, it can be used semi-permanently as the power is transmitted stably.

As described above, the dual-lead worm reduction gear capable of fine-adjusting backlash according to the present invention has been described with reference to the drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, Of course, various modifications may be made by those skilled in the art within the scope of the idea.

1 is a side view of a dual lead worm shaft used in a dual lead worm reducer according to the present invention.

Figure 2 is an enlarged view of the worm screw portion of the dual lead worm shaft used in the dual lead worm reducer according to the present invention

Figure 3 is a longitudinal sectional view and a left and right side view of the fine adjustment housing used in the dual-lead worm reducer according to the present invention

Figure 4 is a perspective view of the fine adjustment housing used in the dual-lead worm reducer according to the present invention

5 is a side view and a longitudinal sectional view of the dual lead worm reducer according to the present invention with reference to the A-A line shown in the right side view of the fine adjustment housing of FIG.

6 is a side view and a longitudinal sectional view of the dual lead worm reducer according to the present invention based on the B-B line shown in the right side view of the fine adjustment housing of FIG.

<Explanation of symbols for the main parts of the drawings>

1: Worm screw part 2: Center pitch

3: sound lid 4: large lead

5: End circumferential wing part 6: Middle circumferential wing part

5a: Bolt hole 6a: Mooren wrench bolt ball

6b: Wrench bolt ball 7: Worm screw mount

8a1,8a2: Left pitch plane 8b1,8b2: Right pitch plane

9: case 10: dual lead worm shaft

11: Dual lead worm wheel 12: Fine adjustment housing

13: motor 14: wrench bolt

15: mood wrench bolt 17: bolt

18: cover PL: reference pitch line

Claims (3)

The dimension of the center pitch 2, which is the distance between the peaks 7 and the center of the peaks of the worm screw portion 1 formed of the peaks and valleys, and the left pitch surface 8a1 and the reference pitch line PL of the peaks The dimension of the sound 3, which is the distance between the point of meeting and the left pitch face 8a2 of the next mountain and the point 3a where the reference pitch line PL meets, and the right pitch face 8b1 of the mountain and the reference The size of the large lead 4, which is the distance between the point 4a where the pitch line PL meets and the point 4a where the right pitch surface 8b2 of the next mountain and the reference pitch line PL meet each other, A dual lead worm shaft 10 having the acid 7 thicker in one direction; A dual lead worm wheel 11 having a central pitch such as the dual lead worm shaft 10 and a worm screw portion of a sound lead and a large lead and engaged with the dual lead worm shaft 10; A motor 13 axially coupled to one side of the dual lead worm shaft 10 so as to allow the dual lead worm shaft 10 to flow along the motor shaft direction; The dual lead worm shaft 10 is rotated on one side of the dual lead worm shaft 10 so that the dual lead worm shaft 10 can move straight along the motor shaft direction while rotating on the motor shaft of the motor 13. Fine-tuning housing 2; And A case 9 accommodating the dual lead worm shaft 10 and the worm wheel 11; Consisting of the dual-lead worm shaft 10 and the worm wheel 11 is worn by using the rotational linear movement of the dual-lead worm shaft 10 according to the rotation adjustment of the fine adjustment housing 12, the gap is further opened Dual-lead worm reducer capable of fine-tuning backlash, which enables to continuously and abnormally fine-tune abnormal backlash. The method of claim 1, The worm screw portion 1 of the worm gear set in which the dual lead worm shaft 10 and the worm wheel 11 are engaged with each other has a center pitch 2, a sound lead 3, and a large lead 4 having a large lead> center pitch. > Dual-lead worm reducer with fine adjustment of backlash, characterized in that it is a dual-lead with a difference in size in the order of sound. The method according to claim 1 or 2, The dual lead worm shaft (10) is a special steel, the dual lead worm wheel (11) is an ALBC aluminum alloy, the case (9) is a dual-lead worm reducer capable of fine adjustment of the backlash.

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