KR200409494Y1 - A reduction gear - Google Patents

Abstract

The present invention relates to a deceleration device, and more particularly, it is advantageous to precise control by minimizing backlash caused by undercut as well as less noise by being rotated by eccentric internal rotation, thereby improving volume and weight by improving durability. It can be reduced to maximize space utilization, and also to a reduction gear that can obtain a large reduction ratio with a small power.

The reduction gear of the present invention has less noise as the air gear and the small gear are inscribed on the housing and the output shaft, respectively, and the gears are eccentrically coupled to the drive shaft. Minimizes backlash due to undercut, which is advantageous for precision control. As a result, durability is improved, and volume and weight can be reduced, thereby maximizing space utilization.

In addition, since the output shaft is rotated by the rotational force of the sum of the electric power and the magnetic power, a large reduction ratio can be obtained, and thus the rotational force of the power source (motor) can be greatly reduced.

Reduction gear, internal gear, standby gear, output shaft,

Description

Reduction Gears {A REDUCTION GEAR}

1 is a perspective view showing a reduction device according to a preferred embodiment of the present invention.

2 is a perspective view partially separating the reduction device according to an embodiment of the present invention.

Figure 3 is a perspective view of the separated in detail the reduction device according to an embodiment of the present invention.

Figure 4 is a schematic cross-sectional view of the combined cross section of the reduction apparatus according to an embodiment of the present invention.

"A" and "I" of Figure 5 is a schematic plan view showing the operating state of the standby fish according to an embodiment of the present invention.

"A" and "I" of Figure 6 is a plan view schematically showing an operating state according to a preferred embodiment of the present invention.

Figure 7 is a plan view schematically showing the operating state of the brake unit according to an embodiment of the present invention.

※ Explanation of code for main part of drawing ※

10: reduction device 20: housing

22: opening 24: through hole

26: internal gear 30: drive shaft

32: disc 34: eccentric hole

40: waiting gear 42: small gear

44: bearing 50: output shaft

52: internal gear 54: bearing

60: braking gear 62: pinion gear

64: bearing 66: disc

68: eccentric hole I: rotational speed of the drive shaft

The present invention relates to a deceleration device, and more particularly, it is advantageous to precise control by minimizing backlash caused by undercut as well as less noise by being rotated by eccentric internal rotation, thereby improving volume and weight by improving durability. It can be reduced to maximize space utilization, and also to a reduction gear that can obtain a large reduction ratio with a small power.

In general, the engine or motor, which is the driving source, rotates at a high speed due to its efficiency, and according to the device, the speed is reduced to a certain ratio so that the power is supplied at an appropriate RPM. In combination, the effect of deceleration due to tooth aberration is achieved.

In order to achieve a large deceleration, such a gear reducer has to have three or more gears connected to each other, so that many gears and a large number of shafts have a large diameter and large weight. It is desirable to increase the diameter difference between the gears, but in case of engagement between the gears with the small diameter and the large gears, the undercut will inevitably occur at the root even if they are closely bonded to each other. Due to the back lash (back lash) is generated a great difficulty in precision control, there is a fundamental problem that can not be reduced in size and volume to obtain a large reduction ratio.

The present invention has been devised to solve the above problems, as well as the occurrence of less noise as well as minimizing the backlash due to undercuts, which is advantageous for precision control, thereby improving the durability, thereby reducing volume and weight It is to provide a reduction device that can maximize the utilization.

Another object of the present invention is to provide a reduction device that can obtain a large reduction ratio with a small power.

In order to achieve the above object, the present invention has an upper portion formed with an open portion, a lower portion formed with a through portion, and a housing having an internal gear formed therein; An upper end of which a disc having an eccentric hole formed therein is eccentrically fixed, and a lower portion of the drive shaft being introduced into the through hole of the housing; A small gear is attached to an upper center portion, a lower gear is provided with a bearing, eccentrically fastened to the disc of the drive shaft, and an internal gear inscribed to the internal gear of the housing; An output shaft coupled to an inner side of a bearing coupled to an opening of the housing and having magnetic force, and having an internal gear formed therein, the output shaft being internally coupled to the eccentric small gear; And a braking gear that is eccentrically coupled to the air gear lower end of the drive shaft so as to be symmetrical with the eccentrically coupled direction so as to prevent breakage and malfunction.

Preferably the brake gear is a pinion gear inscribed in the internal gear of the housing; A bearing fastened to an inner surface of the pinion; And a disc which is fastened to the inner surface of the bearing and penetrated and fastened to the drive shaft, and an eccentric hole is formed to eccentrically position the pinion gear.

Hereinafter, with reference to the accompanying drawings will be described in more detail the deceleration device of the present invention.

1 is a perspective view showing a reduction device according to a preferred embodiment of the present invention, Figure 2 is a partial perspective view of Figure 1, Figure 3 is a detailed separated perspective view of Figure 1, Figure 4 is a schematic longitudinal cross-sectional view of FIG. to be.

When described in detail with reference to the drawings, the reduction device 10 of the present invention is a housing 20, a drive shaft 30 for transmitting a rotational force, the standby gear 40 is coupled to the drive shaft 30 is rotated and the stand It consists of the output shaft 50 which transmits the rotational force of the gear 40 to the outside. It also includes a braking gear 60.

The upper portion of the housing 20 is formed with an open opening 22, a through-hole 24 is formed in the lower center, and the internal gear 26 is formed therein. A drive shaft 30 through which a lower portion penetrates into the through hole 24 of the housing 20 is provided, and a disc 32 is fixedly fastened to an upper end of the drive shaft 30. 32 is an eccentric hole 34 is formed to be eccentrically fixed to the drive shaft (30). In addition, the disc 32 is provided with a lower gear 40 is coupled to the lower side, the small gear 42 is attached to the upper end of the small gear (40) at the upper end, the lower inside The bearing 44 is provided to be coupled to the disc 32 through the bearing 44. At this time, the small gear 42 attached to the standby gear 40 and the upper surface thereof is eccentric in the same direction as the original plate 32 by being coupled to the original plate 32 which is eccentrically coupled to the drive shaft 30.

Also, there is provided an output shaft 50 having an internal gear 52 formed therein and a bearing 54 to which the output shaft 50 is engaged. That is, the output shaft 50 is coupled to the inside of the bearing coupled to the opening 22 of the housing 20 to have magnetic force, and is internally coupled to the eccentric small gear 42.

Here, when the dimensions between gears are briefly described, the dimension of the standby gear 40 is smaller than the dimension of the internal gear 26 of the housing 20, and the dimensions of the standby gear 40 are smaller. It is preferable that the size of the small gear 42 is smaller than), and that the size of the output shaft 50 is somewhat larger than that of the small gear 42.

In addition, Figure 3 is provided with a perspective view shown upside down to show the inside of the output shaft 50 separately.

Referring to the cross-sectional view of FIG. 4, an open portion 22 is formed at an upper end of the housing 20, a through-hole 24 is formed at a lower center portion thereof, and an internal gear 26 is formed therein. Here, it is apparent that the housing 20 may have a different shape depending on the space in which the reduction device 10 is installed and the structure of the machine. In addition, the housing 20 is preferably fixed without being rotated.

The drive shaft 30 is a cylindrical shaft, the upper plate 32 is formed with an eccentric hole 34 is eccentrically fixed, the lower end is introduced into the through hole 24 of the housing 20. At this time, the lower end of the drive shaft 30 introduced into the through-hole 24 of the housing 20, although not shown is naturally connected to a power source (motor).

The air gear 40 has a small gear 42 having a small dimension at the center of the upper surface, and a bearing 44 is engaged inside the lower side to be coupled to the disc 32 of the drive shaft 30. The inner gear 26 of the housing 20 is eccentrically coupled to the internal gear. That is, the cooler 40 is coupled to the disk 32 which is fixed to the drive shaft 30 by the eccentric hole 34 in the eccentric hole (34) is attached to the top of the cooler 40 and the cooler 40 The small gear 42 is also eccentric in the same direction in which the disc 32 is eccentric.

The output shaft 50 is coupled to the opening portion 22 of the housing 20 as a bearing 54 to have a magnetic force, and is internally coupled to the eccentric small gear 42. At this time, the output shaft 50 is coupled to the drive shaft 30 and the center is the same, it is natural that the coupling to the eccentric gear 42.

Here, the drive shaft 30 and the output shaft 50 is connected to the respective power source and the use devices, although shown in the cylindrical axis in the drawing, they can be manufactured differently in shape depending on the use device It is obvious.

In addition, a braking gear 60 may be optionally used. The braking gear 60 is fastened to an inner surface of the pinion gear 62 and the pinion gear 62 which are inscribed to the internal gear 26 of the housing 20. It is fastened to the bearing 64 and the inner surface of the bearing 64 is inserted into the drive shaft 30, the eccentric hole 68 is formed and includes a disc 66 for eccentric position of the pinion gear 62 It is preferable that it is configured. That is, braking may be possible when the air gear 40 is eccentric in a direction symmetrical with the eccentric direction.

Thus, the braking gear 60 is provided to prevent breakage and malfunction due to rotation that may occur in the output shaft 50. That is, the drive shaft 30 that transmits the rotational force is rotated to come out the reduced rotational force to the output shaft 50 through the air gear 40 provided therein, the normal rotation transmission, on the contrary, the output shaft 50 is There may be a case where the rotation of the drive shaft 30 through the small gear 42 and the standby gear 40 can be rotated due to other forces. Therefore, in this case, the rotation is transmitted instead of the normal rotation, which may cause the internal structure to be broken and malfunction. This can be prevented (see FIG. 6).

"A" and "B" of Figure 5 is a schematic plan view showing the operating state of the drive shaft and the standby gear according to an embodiment of the present invention.

Referring first to "ga" with reference to the drawings, the outer gear is provided with a housing 20 in which the internal gear 26 is formed, the drive shaft 30 is penetrated and installed in the center of the housing 20. The disk 32 having the eccentric hole 34 formed therein is eccentrically fastened to the drive shaft 30, and the air gear 40 is fastened to the disk 32 so that the disk 32 is eccentric in the same direction as the eccentric direction of the disk 32. It is inscribed in the internal gear 26 of the housing 20. At this time, the drive shaft 30 and the disc 32 is fixed and fastened, the disc 32 is coupled to the standby gear 40 and the bearing 44.

Here, looking at "b", when the drive shaft 30 starts to rotate, the gear 40 is eccentrically coupled to the drive shaft 30 to be rotated, so that the force pushed to the outside will be rotated. Therefore, by the rotation of the drive shaft 30, the standby gear 40 is rotated in close contact with the internal gear 26 of the housing 20 will be able to greatly improve the engagement force between the gears (齒).

At this time, the teeth of the standby gear 40 is rotated in correspondence with the dimensions of the internal gear 26 of the housing 20 to be engaged and rotated irrespective of the number of revolutions of the drive shaft 30, so 40) is the deceleration taking place. As a result, it is natural that the reduction ratio is determined according to the difference between the dimensions of the internal gear 26 and the dimensions of the standby gear 40.

For example, if the dimension of the internal gear 26 of the housing | casing 20 is 62, the dimension of the internal gear 40 which is partially inscribed in this internal gear 26 is 53, The drive shaft 30 is to be rotated about 5.8 times the wait fish 40 is naturally rotated once. As a result, in this case, it can be seen that the output shaft 50 and the standby gear 40 can obtain a ratio of 5.8: 1, thereby decelerating the standby gear 40.

"A" and "B" of Figure 6 is a schematic plan view showing the overall operating state according to an embodiment of the present invention.

Referring first to "ga" with reference to the drawings, the outer gear is provided with a housing 20 is formed with an internal gear 26, the internal gear 26 of the housing 20 is a standby gear in which a portion is inscribed 40 is provided, and a small gear 42 is attached to the center of the air gear 40. At this time, the air gear 40 and the small gear 42 fastened to the air gear 40 are eccentric about the drive shaft 30 by being fastened to the disc 32 fixed to the drive shaft 30. It is natural to be. The output shaft 50 having the internal gear 52 formed therein is coupled to the small gear 42 which is thus eccentric. At this time, it is natural that the output shaft 50 is eccentrically coupled with the small gear 42 because it is coincident with the center of the driving shaft 30.

Here, looking at "I", when the drive shaft 30 starts to rotate, the gear 40 is eccentrically coupled to the drive shaft 30 to be rotated, so that a force pushing outwards is applied to the internal gear of the housing 20 ( 26 will be rotated in close proximity. At this time, the standby gear 40 is decelerated by the internal gear 26 of the housing 20, the small gear 42 attached to the upper end will also be decelerated. Thus, the output shaft 50 coupled to the decelerating small gear 42 is also decelerated.

At this time, the output shaft 50 is rotated by the small gear 42 is fastened to the upper end of the standby gear 40, not directly rotated by the standby gear 40 to reduce the rotational force of the drive shaft 30, In addition, since the small gear 42 and the output shaft 50 are eccentrically inscribed at the same time, the output shaft 50 is coupled to the bearing 54, so it is natural to have a magnetic force. Therefore, the output shaft 50 is rotated faster than the rotation of the small gear (42) because the total power and the self-power has its own rotation is transmitted from the small gear (42). That is, compared with the small gear 42, it will increase or decrease. In other words, the drive shaft 30 can rotate the output shaft 50 at a rotational speed less than the rotational speed for rotating the standby gear 40 and the small gear 42. Therefore, a large deceleration can be done with a small force.

Therefore, there is an advantage that can reduce the power of the power source for rotating the drive shaft 30, it is possible to reduce the volume or weight by large deceleration possible with a small force, the standby gear 40 and the small gear 42 is housing (20) and the output shaft 50 is internally rotated to prevent noise, which is a characteristic of internal gears, as well as excellent gear-to-gear engagement, minimizing the occurrence of under cut in tooth roots. As a result, the occurrence of back lash is also small, which enables the precision control.

7 is a schematic plan view illustrating an operating state of a brake unit according to an exemplary embodiment of the present invention.

Referring to the drawings in detail, the drive shaft 30 is provided in the center of the internal gear 26 of the housing 20, the disc 32 is eccentrically fastened to the end of the drive shaft 30, the disc ( 32 is coupled to the air gear 40 eccentric in the same direction as the disc 32 is eccentric, the lower end of the air gear 40 is eccentric opposite to the eccentric direction of the air gear 40 Braking gear 60 is provided.

At this time, the braking gear 60 of the pinion gear 62 is inscribed to the internal gear 26 of the housing 20, the bearing 64 is fastened to the inside of the pinion gear 62 and the bearing 64 It is composed of a disk 66 which is fastened again inside and penetrated into the drive shaft 30, the disk 66 is eccentric so as to be located opposite to the eccentric direction of the disk 32 for coupling the air gear 40 The ball 68 is formed.

That is, the drive shaft 30 rotates the standby gear 40 coupled to the end by coupling the standby gear 40 to the end, the standby gear 40 again rotates the small gear 42 and the output shaft 50 It is to let. Therefore, the rotation transmitted through the drive shaft 30 will be transmitted without being disturbed by the braking gear 60. On the contrary, if the output shaft 50 is rotated by an external force, the output rotates the small gear 42 that is inscribed, and rotates the standby gear 40 to which the small gear 42 is attached. It will have to rotate up to the braking gear 60 installed at the bottom. At this time, it is obvious that the die 40 and the braking gear 60 are not rotated because the directions are provided to be symmetrical with each other.

Therefore, the rotational force transmitted from the drive shaft 30 will be transmitted without being disturbed, and on the contrary, the rotational force transmitted from the output shaft 50 will be disturbed to prevent breakage and malfunction.

Hereinafter, a reduction ratio will be described as an example of the present invention.

Example

Dimension Z1 of the internal gear 26 formed in the housing 20 is 62,

The dimension Z2 of the atmospheric gear 40 which is eccentrically coupled to the internal gear 26 of the housing 20 and rotates along this dimension is 53,

Z3 of the small gear 42 attached to the center of the upper end of the air gear 40 is 20,

When the dimension Z4 of the output shaft 50 which is inscribed and rotated so as to be eccentric with the small gear 42 is 29,

At this time, the rotation speed of the drive shaft 30 to be rotated in order to rotate the standby gear 40 once, should be obtained first, and the rotation speed of the drive shaft 30 can be obtained by substituting the formula of {Z2 / (Z1-Z2)}. have. It can be seen that A is 5.888 when the rotational speed is A and the above numerical values are substituted.

Accordingly, when the drive shaft 30 rotates 5.888, the standby gear 40 rotates 1 time, and the reduction ratio is 5.888: 1. However, according to the present invention, the gear ratio 42 is fastened to the upper end surface of the standby gear 40, and the gear ratio 42 is fastened to the upper gear of the standby gear 40. It is comprised so that an output may come out through the output shaft 50 rotated together. At this time, since the output shaft 50 is configured to have a magnetic force, the output shaft 50 is rotated by the sum of the air power transmitted from the small gear 42 and the magnetic force to be rotated by itself.

Therefore, if the final reduction ratio, ie, the number of revolutions of the drive shaft 30 that rotates the output shaft 50 configured as described above, through the output shaft 50 is applied to the planetary gear calculation method, The equation

{Z2 / (Z1-Z2)} ÷ [{(Z3 ÷ A) + Z4} / Z4)] = The rotation speed I of the drive shaft 30 can be calculated | required.

Substituting the dimension set above in the above formula, it can be seen that I is 5.270. Therefore, when the drive shaft 30 rotates 5.270 times, the output shaft 50 is rotated once. That is, the result that the total reduction ratio according to the above-mentioned dimension was 1 / 5.270 was obtained.

As a result, at first, when the driving shaft 30 rotates 5.888 times, the standby gear 40 is rotated once, and the internal gear is eccentric with the rotation of the small gear 42 attached to the upper end of the standby gear 40. The rotation of the output shaft 50 is rotated once when the drive shaft rotates 5.270 times.

Accordingly, since the output shaft 50 sums the air power transmitted from the small gear 42 and the magnetic force of the output shaft 50, the rotational force of the output shaft 50 is increased so that the driving shaft 30 is first inputted in 5.888 times. One round of 5.270 turns before the turn.

In this way, the same reduction ratio can be obtained at a small number of revolutions of the drive shaft 30, and since the standby gear 40 and the small gear 42 are internally rotated by the housing 20 and the output shaft 50, the size of the internal gear is reduced. Of course, the noise can be prevented as well as the gears between the gears can be improved to improve durability.

In addition, the output shaft 50 having the same reduction ratio can be implemented even with a small number of revolutions of the drive shaft 30 as compared with the conventional reduction gear in the same condition. Therefore, there is also an advantage that can reduce the rotational force of the power source (motor) for rotating the output shaft (50).

The foregoing has outlined rather broadly the features and technical advantages of the subject innovation in order to better understand the utility model registration claims of the subject matter described below. Additional features and advantages of the utility model registration claims of the present invention will be described below. It should be recognized by those skilled in the art that the conception and specific embodiment of the present invention can be used immediately as a basis for designing or modifying other structures for carrying out similar purposes as the present invention.

In addition, such a modification or altered equivalent structure by those skilled in the art as a basis for modifying or designing the structure and concept of the invention disclosed in the present invention to another structure for carrying out the same purpose of the present invention is practical. Various changes, substitutions, and alterations are possible without departing from the spirit or scope of the invention as described in the claims for new registration.

As described above, the deceleration device of the present invention has less noise as the atmospheric gear and the small gear are inscribed on the housing and the output shaft, respectively, and the air gear is eccentrically coupled to the driving shaft. It is rotated, so precise gearing occurs between the gears, minimizing backlash due to undercut, which is advantageous for precision control. This increases the durability and reduces the volume and weight, thus maximizing space utilization. .

In addition, since the output shaft is rotated by the rotational force of the sum of the electric power and the magnetic power, a large reduction ratio can be obtained, and thus the rotational force of the power source (motor) can be greatly reduced.

Claims (2)

An upper portion having an opening portion, a lower portion having a through portion formed therein, and an inner gear formed therein; An upper end of which a disc having an eccentric hole formed therein is eccentrically fixed, and a lower portion of the drive shaft being introduced into the through hole of the housing; A small gear is attached to an upper center portion, a lower gear is provided with a bearing, eccentrically fastened to the disc of the drive shaft, and an internal gear inscribed to the internal gear of the housing; An output shaft coupled to an inner side of a bearing coupled to an opening of the housing and having magnetic force, and having an internal gear formed therein, the output shaft being internally coupled to the eccentric small gear; And Reduction gear characterized in that it comprises a brake gear eccentrically coupled to the symmetrical direction of the eccentrically coupled to the air gear at the lower end of the air gear of the drive shaft to prevent damage and malfunction. The method of claim 1, The braking gear is A pinion gear inscribed in the internal gear of the housing, A bearing fastened to an inner surface of the pinion and And a disc which is fastened to the inner surface of the bearing and inserted into the drive shaft, and has an eccentric hole to eccentrically position the pinion gear.

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