Right-angle shaft power transmission device

Abstract

A right-angle shaft power transmission device according to an embodiment of the present invention includes a main structure assembly having an external structure and an enclosed space formed therein, an input shaft assembly connected to one side of the main structure assembly and receiving rotational power from a motor, an output shaft assembly connected to the other side of the main structure assembly so as to cross the input shaft assembly and receiving rotational power from the motor, and a power transmission direction changing link assembly arranged in the space of the main structure assembly to prevent the spread of noise or vibration, connected to the input shaft assembly and the output shaft assembly in a link manner within the main structure assembly, and changing the power transmission direction from the input shaft assembly to the output shaft assembly.

Description

[Technical field]

[0001] The present invention relates to a right-angle shaft power transmission device, and more particularly to a right-angle shaft power transmission device which can change the power transmission direction to a right-angle shaft while reducing noise and vibration, has a compact structure, can significantly reduce manufacturing costs compared to conventional methods, can be manufactured in a size according to the application, and can be widely applied to various industrial machines. [Background technology]

[0002] Power transmission devices are broadly classified into rack and pinion devices that convert rotary motion into linear motion or linear motion into rotary motion, and gear trains that transmit only rotary motion but convert the rotational speed and torque. Such power transmission devices are widely used in various industrial machines, including semiconductor equipment, flat display equipment such as LCD, PDP, and OLED, etc.

[0003] Meanwhile, in the case of power transmission devices that are applied to various industrial machines or are being prepared for application, the power transmission direction is generally in a straight line, i.e., a linear axis. A linear axis power transmission device is a method in which a reducer is directly connected to a motor, and although the installation height is somewhat large, it has the advantage of being very simple in structure. Therefore, it is widely used.

[0004] However, there are times when the power transmission direction must be bent to a right-angle axis rather than a straight axis due to limited installation space or interference with surrounding structures and devices. In such cases where the power transmission direction must be bent to a right-angle axis, bevel gears are generally used.

[0005] However, bevel gears operate by directly meshing two gears at a 45° angle and rubbing against each other, which generates a lot of noise and vibration. In order to reduce this noise and vibration, a precisely manufactured and expensive bevel gear must be used, which increases manufacturing costs.

[0006] In addition, in reality, it is practically difficult to manufacture large bevel gears above a certain size, so there is a problem that there is a certain limit to converting the power transmission direction to a right-angle shaft using bevel gears. Summary of the Invention [Problem to be solved by the invention]

[0007] The technical problem to be solved by the present invention is to provide a right-angle shaft power transmission device which can change the power transmission direction to a right-angle shaft while reducing noise and vibration, has a compact structure, can reduce manufacturing costs significantly compared to conventional methods, can be manufactured in a size according to the application, and can be widely applied to various industrial machines. [Means for solving the problem]

[0008] According to one aspect of the present invention, there is provided a right-angle shaft power transmission device comprising: a main structure assembly having an external structure and an enclosed space formed therein; an input shaft assembly connected to one side of the main structure assembly and receiving rotational power of a motor; an output shaft assembly connected to the other side of the main structure assembly so as to intersect with the input shaft assembly and receiving rotational power of the motor; and a power transmission direction changing link assembly disposed in the space of the main structure assembly to prevent diffusion of noise or vibration, the link assembly being connected to the input shaft assembly and the output shaft assembly in a link manner within the main structure assembly and changing the direction of power transmission from the input shaft assembly to the output shaft assembly.

[0009] The power transmission direction changing link assembly can change the direction of power transmission input from the input shaft assembly by 90° and transmit the output to the output shaft assembly on a one-to-one basis, and the power transmission direction changing link assembly can include a main link member; an input shaft link member having one side connected to the input shaft assembly and the other side connected to be rotatable relative to one side of the main link member; and an output shaft link member having one side connected to the output shaft assembly and the other side connected to be rotatable relative to the other side of the main link member.

[0010] The power transmission direction changing link assembly may further include an input shaft connecting portion that connects the main link member and the input shaft link member so as to be rotatable relative to one another, and an output shaft connecting portion that connects the main link member and the output shaft link member so as to be rotatable relative to one another.

[0011] The input shaft connecting portion may include: an input shaft sub-link having one side connected to the input shaft link member and the other side connected to the main link member; a first input shaft bearing arranged in a connection area between the input shaft sub-link and the input shaft link member; an input shaft power transmission pin integrally connected to the input shaft link member, the input shaft sub-link and the first input shaft bearing and transmitting power from the input shaft link member side to the input shaft sub-link; and a second input shaft bearing arranged in a connection area between the input shaft sub-link and the main link member.

[0012] The input shaft connecting portion may further include a plurality of input shaft locking rings provided for fixing a position of the input shaft sub-link or the input shaft power transmission pin.

[0013] The output shaft connecting portion may include: an output shaft sub-link having one side connected to the output shaft link member and the other side connected to the main link member; a first output shaft bearing arranged in a connection area between the output shaft sub-link and the output shaft link member; an output shaft power transmission pin integrally connected to the output shaft link member, the output shaft sub-link and the first output shaft bearing and transmitting power from the output shaft link member side to the output shaft sub-link; and a second output shaft bearing arranged in a connection area between the output shaft sub-link and the main link member.

[0014] The output shaft connecting portion may further include a plurality of output shaft locking rings provided for fixing the position of the output shaft sub-link or the output shaft power transmission pin.

[0015] The input shaft connecting portion and the output shaft connecting portion have the same structure.

[0016] The main link member may include: a disc-shaped link body having first and second link connecting parts, which connect the input shaft link member and the output shaft link member, respectively, formed in opposite directions on both sides; at least one weight reducing part penetrating a center region of the disc-shaped link body and reducing a weight of the disc-shaped link body; and at least one inertia moment balancing part provided in a side region of the disc-shaped link body adjacent to the input shaft link member and the output shaft link member, for balancing the inertia moment during rotational movement of the disc-shaped link body.

[0017] The main link member may be an S-shaped link member, and the input shaft link member and the output shaft link member may be Y-shaped link members having the same shape.

[0018] The input shaft link member may be keyed to the input shaft assembly by an input shaft key, and the output shaft link member may be keyed to the output shaft assembly by an output shaft key.

[0019] The main structure assembly may include a structure body having the space formed therein and an input shaft assembly connection portion formed on one side to which the input shaft assembly is connected; a structure cover connected to the structure body and having an output shaft assembly connection portion to which the output shaft assembly is connected; and a plurality of structure cover fastening members for detachably fastening the structure cover to the structure body.

[0020] The main structure assembly may further include a structure cover O-ring disposed between the structure cover and the structure body to hermetically seal the structure cover and the structure body; a structure cover dowel pin disposed between the structure cover and the structure body to align the position of the structure cover with respect to the structure body; a front cover that covers one side of a front opening of the structure body; a plurality of front cover fastening members that detachably fasten the front cover to the structure body; and a front cover O-ring disposed between the front cover and the structure body to hermetically seal the front cover and the structure body.

[0021] The input shaft assembly may include: an input shaft structure connected to one side of the main structure assembly; a plurality of input shaft fixing bolts for fixing the input shaft structure to the main structure assembly; an input shaft adapter rotated by the motor and having one side connected to the power transmission direction changing link assembly for inputting the power of the motor to the power transmission direction changing link assembly; an input shaft adapter bearing disposed in the input shaft structure and supporting the rotational motion of the input shaft adapter; and an input shaft adapter bearing preload plate for forming a preload on the input shaft adapter bearing.

[0022] The input shaft assembly may further include a motor mounting plate to which the motor is mounted; a clamp for fastening a motor shaft of the motor to the input shaft adapter; and a clamp tightening bolt for tightening the clamp.

[0023] The output shaft assembly may include: an output shaft structure connected to the other side of the main structure assembly; a plurality of output shaft fixing bolts for fixing the output shaft structure to the main structure assembly; an output shaft adapter connected to the other side of the power transmission direction changing link assembly and for outputting the power transmitted from the power transmission direction changing link assembly; an output shaft adapter bearing disposed on the output shaft structure and supporting the rotational motion of the output shaft adapter; and an output shaft adapter bearing preload plate for forming a preload on the output shaft adapter bearing. Effect of the Invention

[0024] According to the present invention, not only can the power transmission direction be changed to a right-angle shaft while reducing noise and vibration, but the structure is compact, the manufacturing costs can be significantly reduced compared to the conventional art, and the device can be manufactured in a size according to the application, making it widely applicable to a variety of industrial machines. [Brief description of the drawings]

[0025] [Figure 1] 1 is a perspective view of a right-angle shaft power transmission device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a side view of FIG. [Diagram 3] FIG. 2 is a partially cut-away perspective view of FIG. [Figure 4] FIG. 3 is a front cross-sectional view of FIG. 2. [Diagram 5] FIG. 2 is a partially cut-away perspective view of the main structural assembly. [Figure 6] FIG. 2 is a partial exploded view of the main structural assembly. [Figure 7] FIG. 2 is a partial cutaway perspective view of an input shaft assembly; [Figure 8] FIG. 4 is a partial exploded view of the input shaft assembly. [Figure 9] FIG. 2 is a partially cutaway perspective view of an output shaft assembly; [Figure 10] FIG. 4 is a partial exploded view of the output shaft assembly. [Figure 11] FIG. 2 is a perspective view of a power transmission direction changing link assembly. [Figure 12]FIG. 2 is an exploded perspective view of a power transmission direction changing link assembly. [Figure 13] FIG. 4 is an enlarged perspective view of a main link member. [Figure 14A] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 14B] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 14C] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 14D] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 14E] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 14F] 4 is a diagram showing a state in which a power transmission direction changing link assembly is rotated by different angles. [Figure 15] 13 is a perspective view of a power transmission direction changing link assembly applied to a right-angle shaft power transmission device according to another embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] For a fuller understanding of the invention, its operating advantages, and the objects attained by its practice, reference should be made to the accompanying drawings in which a preferred embodiment of the invention is illustrated and the contents thereof.

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail by way of preferred embodiments with reference to the accompanying drawings, in which like reference numerals in different drawings refer to like elements.

[0028] FIG. 1 is a perspective view of a right-angle shaft power transmission device according to one embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a partially cut-away perspective view of FIG. 1, FIG. 4 is a front cross-sectional view of FIG. 2, FIG. 5 is a partially cut-away perspective view of a main structure assembly, FIG. 6 is a partially exploded view of the main structure assembly, FIG. 7 is a partially cut-away perspective view of an input shaft assembly, FIG. 8 is a partially exploded view of an input shaft assembly, FIG. 9 is a partially cut-away perspective view of an output shaft assembly, FIG. 10 is a partially exploded view of an output shaft assembly, FIG. 11 is a perspective view of a power transmission direction changing link assembly, FIG. 12 is an exploded perspective view of the power transmission direction changing link assembly, FIG. 13 is an enlarged perspective view of a main link member, and FIGS. 14A to 14F are views of the power transmission direction changing link assembly rotated at different angles.

[0029] Referring to these drawings, the right-angle shaft power transmission device 100 according to one embodiment of the present invention can change the power transmission direction to a right-angle shaft as shown in FIG. 2 while reducing noise and vibration. In addition, since it has a compact structure, the manufacturing cost can be significantly reduced compared to the conventional art. Furthermore, since it can be manufactured in a size according to the purpose, it can be widely applied to various industrial machines.

[0030] The right-angle shaft power transmission device 100 according to one embodiment of the present invention that can provide such effects includes a main structure assembly 110 that forms the external structure, and an input shaft assembly 130, an output shaft assembly 150, and a power transmission direction changing link assembly 170 are connected to the main structure assembly 110 at different positions.

[0031] The main structure assembly 110 is a box-type structure forming the exterior structure as shown in Figures 1 to 6. It forms a sealed space 112 inside so that the power transmission direction changing link assembly 170 can be disposed therein.

[0032] The power transmission direction changing link assembly 170 is disposed in the sealed space 112 within the main structure assembly 110, and the power transmission direction changing link assembly 170 operates as shown in Figures 14A to 14F, thereby making it possible to significantly reduce noise and vibration compared to the conventional method when changing the power transmission direction to a right-angle axis as shown in Figure 2.

[0033] Such a main structural assembly 110 includes a structural body 111 and a structural cover 114 which can be disassembled and assembled from each other.

[0034] The structure body 111 is a box-shaped structure having a space 112 formed therein and an input shaft assembly connection part 113 formed on one side to which the input shaft assembly 130 is connected. The input shaft assembly connection part 113 is hole-shaped, and the input shaft assembly 130 is airtightly connected to the input shaft assembly connection part 113.

[0035] An opening 125 having a shape similar to the hole-shaped input shaft assembly connection portion 113 is formed on the entire surface of one side of the structure body 111, and a front cover 121 is provided to cover the front opening 125 on one side of the structure body 111.

[0036] The front cover 121 is fastened at a corresponding position by a front cover fastening member 122. That is, the front cover fastening member 122 serves to detachably fasten the front cover 121 to the structure body 111. Since the front cover 121 is fastened by the front cover fastening member 122, a front opening 125 on one side of the structure body 111 is closed.

[0037] At this time, a front cover O-ring 123 is used between the front cover 121 and the structure body 111 to keep the gap between the front cover 121 and the structure body 111 airtight. Therefore, leakage of the internal lubricant through a front opening 125 on one side of the structure body 111 can be prevented.

[0038] The structure cover 114 is a structure that is detachably connected to the structure body 111. A plurality of structure cover fastening members 116 are used to attach and detach the structure cover 114. The structure cover fastening members 116 are means for detachably fastening the structure cover 114 to the structure body 111. With the structure cover 114 attached and detached in this manner, the power transmission direction changing link assembly 170 can be installed in the space 112 within the structure body 111, and can be lubricated and maintained.

[0039] The structure cover 114 is provided with an output shaft assembly connection portion 115 to which the output shaft assembly 150 is connected. Unlike the input shaft assembly connection portion 113, the output shaft assembly connection portion 115 is formed of a protruding structure.

[0040] A structure cover O-ring 117 is disposed between the structure cover 114 and the structure body 111. The structure cover O-ring 117 is disposed between the structure cover 114 and the structure body 111, and serves to maintain airtightness between the structure cover 114 and the structure body 111. The structure cover O-ring 117 can prevent leakage of the internal lubricant between the structure cover 114 and the structure body 111.

[0041] A structure cover dowel pin 118 is further disposed between the structure cover 114 and the structure body 111. The structure cover dowel pin 118 serves to align the position of the structure cover 114 with respect to the structure body 111. Therefore, disassembly and assembly, particularly assembly, of the structure cover 114 becomes easy.

[0042] As shown in FIGS. 1 to 4, 7 and 8, the input shaft assembly 130 is connected to one side of the main structure assembly 110 and receives rotational power from a motor (not shown).

[0043] The input shaft assembly 130 includes an input shaft structure 131 connected to one side of the main structure assembly 110, and the following structures and configurations are connected to each other at different positions through the input shaft structure 131.

[0044] A plurality of input shaft fixing bolts 132 are used to fix the input shaft structure 131. That is, the input shaft fixing bolts 132 are a means for fixing the input shaft structure 131 to the main structure assembly 110.

[0045] An input shaft adaptor 133 is disposed in the input shaft structure 131. The input shaft adaptor 133 is rotated by the motor, and one side is connected to an input shaft link member 172 of a power transmission direction changing link assembly 170, and inputs the power of the motor to the input shaft link member 172. The input shaft link member 172 is keyed to the input shaft adaptor 133 of the input shaft assembly 130 by an input shaft key 173. Therefore, the input shaft assembly 130 is prevented from spinning freely.

[0046] A clamp 137 for fastening the motor shaft of the motor is provided to the input shaft adapter 133. The clamp 137 is fastened by a clamp fastening bolt 138.

[0047] An input shaft adapter bearing 134 is disposed around the input shaft adapter 133. The input shaft adapter bearing 134 is disposed in the input shaft structure 131, and serves to support the rotational motion of the input shaft adapter 133. In other words, the input shaft adapter bearing 134 makes the rotational motion of the input shaft adapter 133 smooth.

[0048] An input shaft adapter bearing preload plate 135 is used for installing such an input shaft adapter bearing 134. The input shaft adapter bearing preload plate 135 is a means for forming a preload on the input shaft adapter bearing 134. That is, the input shaft adapter bearing preload plate 135 adjusts the clearance of the input shaft adapter bearing 134 to improve the bearing rotation accuracy, while also making it possible to adjust the assembly distance of the power transmission direction changing link assembly 170.

[0049] A motor mounting plate 136 is provided around the input shaft structure 131. A motor (not shown) is mounted on the motor mounting plate 136. The motor mounting plate 136 is fixed in position by motor mounting plate fixing bolts 141.

[0050] The input shaft assembly 130 is provided with an input shaft oil seal 142. The input shaft oil seal 142 can prevent leakage of internal lubricant through the input shaft assembly 130.

[0051] 1 to 4, 9 and 10, the output shaft assembly 150 is connected to the other side of the main structure assembly 110 so as to intersect with the input shaft assembly 130, and is the part from which the rotational power of the motor is output. Except for the motor mounting structure, the output shaft assembly 150 has a similar structure to the input shaft assembly 130.

[0052] The output shaft assembly 150 also includes an output shaft structure 151 connected to the other side of the main structure assembly 110, and the following structures and configurations are connected in different positions through the output shaft structure 151.

[0053] A plurality of output shaft fixing bolts 152 are used to fix the output shaft structure 151. That is, the output shaft fixing bolts 152 are a means for fixing the output shaft structure 151 to the main structure assembly 110.

[0054] An output shaft adaptor 153 is disposed in the output shaft structure 151. The output shaft adaptor 153 is connected to the other side of the power transmission direction changing link assembly 170, i.e., to the output shaft link member 174 of the power transmission direction changing link assembly 170, and is a means for outputting the power transmitted from the power transmission direction changing link assembly 170. A device can be connected via the output shaft adaptor 153 to provide rotational power.

[0055] The output shaft link member 174 can be keyed to the output shaft adapter 153 of the output shaft assembly 150 by the output shaft key 175. Therefore, the output shaft link member 174 is prevented from spinning freely.

[0056] An output shaft adapter bearing 154 that supports the rotational motion of the output shaft adapter 153 is provided on the output shaft structure 151. An output shaft adapter bearing preload plate 155 that applies a preload to the output shaft adapter bearing 154 is connected to the output shaft adapter bearing 154. The output shaft adapter bearing preload plate 155 also provides the same function as the input shaft adapter bearing preload plate 135 described above. In other words, the output shaft adapter bearing preload plate 155 adjusts the clearance of the output shaft adapter bearing 154 to increase the bearing rotation accuracy, while making it possible to adjust the assembly distance of the power transmission direction changing link assembly 170.

[0057] Meanwhile, as shown in Figures 1 to 4, 11 and 12, the power transmission direction changing link assembly 170 is disposed in the space 112 of the main structure assembly 110 to prevent the diffusion of noise or vibration, and operates, for example, as shown in Figures 14A to 14F. The link assembly 170 is connected to the input shaft assembly 130 and the output shaft assembly 150 in a link manner within the main structure assembly 110, and serves to change the direction of power transmission from the input shaft assembly 130 to the output shaft assembly 150.

[0058] In particular, the power transmission direction changing link assembly 170 applied to this embodiment changes the power transmission direction input from the input shaft assembly 130 by 90 degrees and transmits the output to the output shaft assembly 150 in a one-to-one ratio.

[0059] The link structure has low friction noise and vibration, unlike conventional bevel gears. In addition, the power transmission direction changing link assembly 170 applied to the present embodiment is arranged in the sealed space 112 of the main structure assembly 110 and then operates, so noise and vibration can be prevented from escaping to the outside. The power transmission direction changing link assembly 170 with the link structure has a simple structure, which can contribute to reducing manufacturing costs, and has the advantage of being able to be manufactured to a desired size, unlike bevel gears.

[0060] Such a power transmission direction changing link assembly 170 may include a main link member 171, an input shaft link member 172 having one side connected to the input shaft assembly 130 and the other side connected to one side of the main link member 171 so as to be freely rotatable relative to the main link member 171, and an output shaft link member 174 having one side connected to the output shaft assembly 150 and the other side connected to the other side of the main link member 171 so as to be freely rotatable relative to the other side of the main link member 171.

[0061] The main link member 171 is a central link of the power transmission direction changing link assembly 170, and forms a location where the input shaft link member 172 and the output shaft link member 174 are connected at the regions at both ends thereof.

[0062] In this embodiment, the main link member 171 may include a disc-shaped link body 171a having a disc shape, at least one weight reducing portion 171b that penetrates a center region of the disc-shaped link body 171a and reduces the weight of the disc-shaped link body 171a, and at least one inertia moment balancing portion 171c that is provided in a side region of the disc-shaped link body 171a adjacent to the input shaft link member 172 and the output shaft link member 174 and that balances the moment of inertia during rotational movement of the disc-shaped link body 171a.

[0063] The disc-shaped link body 171a has a circular outer shape except for the portion where the input shaft link member 172 and the output shaft link member 174 contact each other. The disc-shaped link body 171a functions as a flywheel to realize smooth rotation together with the input shaft link member 172 and the output shaft link member 174.

[0064] On both sides of the disc-shaped link body 171a, first and second link connecting parts 171d, 171e are formed to respectively connect the input shaft link member 172 and the output shaft link member 174. The first and second link connecting parts 171d, 171e are provided in a protruding form and are arranged in opposite directions on both sides of the disc-shaped link body 171a.

[0065] The weight reducing portion 171b is formed in the center region of the disc-shaped link body 171a and serves to reduce the weight of the disc-shaped link body 171a. In this embodiment, the weight reducing portion 171b is formed in the form of a circular through hole.

[0066] The inertia moment balancing portion 171c is provided in a side region of the disc-shaped link body 171a and plays a role in balancing the inertia moment during rotational motion of the disc-shaped link body 171a. In this embodiment, the inertia moment balancing portion 171c is evenly arranged in both side regions of the disc-shaped link body 171a adjacent to the input shaft link member 172 and the output shaft link member 174. The inertia moment balancing portion 171c also takes the form of a hole.

[0067] An input shaft link member 172 and an output shaft link member 174 which are connected to regions at both ends of the main link member 171 are Y-shaped link members and have the same shape.

[0068] One side of input shaft link member 172 as a Y-shaped link member is connected to input shaft assembly 130, and the other side is connected to one side of main link member 171 so as to be rotatable relative to the other side. Also, one side of output shaft link member 174 as a Y-shaped link member is connected to output shaft assembly 150, and the other side is connected to the other side of main link member 171 so as to be rotatable relative to the other side.

[0069] In addition, the power transmission direction changing link assembly 170 further includes an input shaft connecting part 180 and an output shaft connecting part 190 as means for connecting the input shaft link member 172 and the output shaft link member 174 to each other so as to be rotatable relative to each other at both end regions of the main link member 171. In this embodiment, the input shaft connecting part 180 and the output shaft connecting part 190 have the same structure. This makes assembly and maintenance easy. However, the input shaft connecting part 180 and the output shaft connecting part 190 do not necessarily have the same structure, and the scope of the present invention is not limited to this matter.

[0070] First, the input shaft connecting portion 180 is a means for connecting the main link member 171 and the input shaft link member 172 so as to be relatively rotatable with each other. It is made up of various parts and units.

[0071] Such an input shaft connection portion 180 may include an input shaft sub-link 181 connected to the input shaft link member 172 on one side and to the main link member 171 on the other side, a first input shaft bearing 182 arranged in the connection area between the input shaft sub-link 181 and the input shaft link member 172, an input shaft power transmission pin 183 integrally connected to the input shaft link member 172, the input shaft sub-link 181, and the first input shaft bearing 182 and transmitting power from the input shaft link member 172 side to the input shaft sub-link 181, and a second input shaft bearing 184 arranged in the connection area between the input shaft sub-link 181 and the main link member 171.

[0072] One end of the input shaft sub-link 181 is inserted into an open portion of the input shaft link member 172 serving as a Y-shaped link member, and the other end is coupled to a hole (opening) formed at an end of the main link member 171 serving as an S-shaped link member. In order to connect the input shaft link member 172 and the main link member 171 so as to be relatively rotatable between them, the input shaft sub-link 181 is provided with a first input shaft bearing 182 and a second input shaft bearing 184 for guiding smooth rotation at both ends of the input shaft sub-link 181. In particular, in the case of the first input shaft bearing 182, one end of the input shaft sub-link 181 is inserted into the open portion of the input shaft link member 172, and an input shaft power transmission pin 183 is further used in the first input shaft bearing 182.

[0073] A plurality of input shaft locking rings 185 are further used in the input shaft connecting portion 180. The input shaft locking rings 185 are provided to fix the position of the input shaft sub-link 181 or the input shaft power transmission pin 183. The input shaft locking rings 185 are E-shaped rings.

[0074] Next, the output shaft connecting portion 190 is a means for connecting the main link member 171 and the output shaft link member 174 so as to be relatively rotatable with each other. The output shaft connecting portion 190 is also made up of various parts and units.

[0075] The output shaft connecting portion 190 is also different in position and has substantially the same structure, function, and role as the input shaft connecting portion 180. That is, the output shaft connecting portion 190 may include an output shaft sub-link 191 connected to the output shaft link member 174 at one side and to the main link member 171 at the other side, a first output shaft bearing 192 arranged in a connecting region between the output shaft sub-link 191 and the output shaft link member 174, an output shaft power transmission pin 193 connected integrally to the output shaft link member 174, the output shaft sub-link 191, and the first output shaft bearing 192 and transmitting power from the output shaft link member 174 side to the output shaft sub-link 191, and a second output shaft bearing 194 arranged in a connecting region between the output shaft sub-link 191 and the main link member 171.

[0076] A plurality of output shaft locking rings 195 as E-rings are further used in the output shaft connecting portion 190. The output shaft locking rings 195 are provided to fix the position of the output shaft sub-link 191 or the output shaft power transmission pin 193.

[0077] The operation of the right-angle shaft power transmission device 100 according to one embodiment of the present invention will now be described.

[0078] As described above, when a motor (not shown) is mounted on the input shaft assembly 130 and then driven, the rotational force of the motor is input through the input shaft assembly 130, the power transmission direction is changed by 90° through the power transmission direction changing link assembly 170, and the power can be transmitted one-to-one through the output shaft assembly 150. In other words, the power of the motor is output to the output shaft assembly 150 after only the direction is changed in a one-to-one manner.

[0079] At this time, the states of the power transmission direction changing link assembly 170 rotated by each angle are the same as those in Figures 14A to 14F. That is, the states of the power transmission direction changing link assembly 170 rotated by 0°, 60°, 120°, 180°, 240°, and 300° are the same as those in Figures 14A to 14F.

[0080] According to this embodiment, which operates with the above-mentioned structure, not only can the power transmission direction be changed to a right-angle shaft while reducing noise and vibration, but also, since it has a compact structure, the manufacturing cost can be significantly reduced compared to the conventional case. Furthermore, it can be manufactured in a size according to the application, and can be widely applied to various industrial machines.

[0081] FIG. 15 is a perspective view of a power transmission direction-changing link assembly applied to a right-angle shaft power transmission device according to another embodiment of the present invention.

[0082] Referring to this drawing, the power transmission direction changing link assembly 270 applied to this embodiment may also include a main link member 271, an input shaft link member 172 having one side connected to the input shaft assembly 130 and the other side connected to one side of the main link member 271 so as to be freely rotatable relative to the main link member 271, and an output shaft link member 174 having one side connected to the output shaft assembly 150 and the other side connected to the other side of the main link member 271 so as to be freely rotatable relative to the other side of the main link member 271.

[0083] The structures, functions and roles of the input shaft link member 172 and the output shaft link member 174 are the same as those in the above-described embodiment, and therefore a repeated description will be omitted.

[0084] Meanwhile, the main link member 271 applied to this embodiment is a link at the center of the power transmission direction changing link assembly 270, and its end regions form the locations where the input shaft link member 172 and the output shaft link member 174 are connected, and in this embodiment, the main link member 271 is made of an S-shaped link member. Even if the main link member 271 is applied as an S-shaped link member, the effects of the present invention can be provided.

[0085] As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications and variations should be considered to fall within the scope of the claims of the present invention. [Industrial Applicability]

[0086] The present invention can be used in industrial machinery and equipment including various machine tools requiring rotary or linear motion, semiconductor or flat panel display manufacturing equipment, and various logistics transport equipment.

Claims

1. a main structure assembly that forms an exterior structure and has an enclosed space formed therein; an input shaft assembly connected to one side of the main structure assembly and receiving rotational power from a motor; an output shaft assembly connected to the other side of the main structure assembly so as to intersect with the input shaft assembly and outputting rotational power of the motor; a power transmission direction changing link assembly which is disposed in a space of the main structure assembly to prevent diffusion of noise or vibration, is connected to the input shaft assembly and the output shaft assembly in a link manner within the main structure assembly, and changes the power transmission direction from the input shaft assembly to the output shaft assembly; A right-angle shaft power transmission device comprising:

2. the power transmission direction changing link assembly changes the power transmission direction input from the input shaft assembly by 90° and transmits the output to the output shaft assembly in a one-to-one ratio; The power transmission direction changing link assembly includes: A main link member; an input shaft link member, one side of which is connected to the input shaft assembly and the other side of which is connected to one side of the main link member so as to be relatively rotatable; an output shaft link member, one side of which is connected to the output shaft assembly and the other side of which is connected to the other side of the main link member so as to be relatively rotatable; 2. The right-angle shaft power transmission device according to claim 1, further comprising:

3. The power transmission direction changing link assembly includes: an input shaft connecting portion that connects the main link member and the input shaft link member so as to be rotatable relative to each other; an output shaft connecting portion that connects the main link member and the output shaft link member so as to be rotatable relative to each other; 3. The right angle shaft power transmission device according to claim 2, further comprising:

4. The input shaft connecting portion is an input shaft sub-link having one side connected to the input shaft link member and the other side connected to the main link member; a first input shaft bearing disposed in a connection region between the input shaft sub-link and the input shaft link member; an input shaft power transmission pin that is integrally connected to the input shaft link member, the input shaft sub-link, and the first input shaft bearing and transmits power from the input shaft link member side to the input shaft sub-link; a second input shaft bearing disposed in a connection region between the input shaft sub-link and the main link member; 4. The right-angle shaft power transmission device according to claim 3, further comprising:

5. The input shaft connecting portion is 5. The right angle shaft power transmission device according to claim 4, further comprising a plurality of input shaft locking rings for fixing the positions of the input shaft sub-links or the input shaft power transmission pins.

6. The output shaft connecting portion is an output shaft sub-link having one side connected to the output shaft link member and the other side connected to the main link member; a first output shaft bearing disposed in a connection region between the output shaft sub-link and the output shaft link member; an output shaft power transmission pin that is integrally connected to the output shaft link member, the output shaft sub-link, and the first output shaft bearing and transmits power from the output shaft link member side to the output shaft sub-link; a second output shaft bearing disposed in a connection region between the output shaft sub-link and the main link member; 4. The right-angle shaft power transmission device according to claim 3, further comprising:

7. The output shaft connecting portion is 7. The right-angle shaft power transmission device according to claim 6, further comprising a plurality of output shaft locking rings for fixing the positions of the output shaft sub-links or the output shaft power transmission pins.

8. 4. The right-angle shaft power transmission device according to claim 3, wherein the input shaft connecting portion and the output shaft connecting portion have the same structure.

9. The main link member is a disc-shaped link body having first and second link connecting parts, which connect the input shaft link member and the output shaft link member, respectively, formed in opposite directions on both sides thereof; At least one weight reducing portion is provided through a center region of the disk-shaped link body to reduce a weight of the disk-shaped link body; at least one inertia moment balancing portion provided in a side region of the disk-shaped link body adjacent to the input shaft link member and the output shaft link member for balancing the inertia moment during rotational motion of the disk-shaped link body; 3. The right-angle shaft power transmission device according to claim 2, further comprising:

10. The main link member is an S-shaped link member, 3. The right-angle shaft power transmission device according to claim 2, wherein the input shaft link member and the output shaft link member are Y-shaped link members having the same shape.

11. the input shaft link member is keyed to the input shaft assembly by an input shaft key; 3. The right angle shaft power transmission device according to claim 2, wherein the output shaft link member is keyed to the output shaft assembly by an output shaft key.

12. The main structure assembly includes: a structural body having the space formed therein and an input shaft assembly connection portion formed on one side thereof to which the input shaft assembly is connected; a structure cover including an output shaft assembly connection portion to which the output shaft assembly is connected and connected to the structure body; a plurality of structure cover fastening members for detachably fastening the structure cover and the structure body; 2. The right-angle shaft power transmission device according to claim 1, further comprising:

13. The main structure assembly includes: a structure cover O-ring disposed between the structure cover and the structure body to maintain airtightness between the structure cover and the structure body; a structure cover dowel pin disposed between the structure cover and the structure body for aligning the position of the structure cover relative to the structure body; a front cover for covering a front opening on one side of the structure body; a plurality of front cover fastening members for removably fastening the front cover to the structure body; a front cover O-ring disposed between the front cover and the structure body to maintain airtightness between the front cover and the structure body; 13. The right angle shaft power transmission device of claim 12, further comprising:

14. The input shaft assembly includes: an input shaft structure connected to one side of the main structure assembly; a plurality of input shaft fixing bolts for fixing the input shaft structure to the main structure assembly; an input shaft adapter that is rotated by the motor and has one side connected to the power transmission direction changing link assembly to input the power of the motor to the power transmission direction changing link assembly; an input shaft adapter bearing disposed in the input shaft structure and supporting a rotational motion of the input shaft adapter; an input shaft adapter bearing preload plate for applying a preload to the input shaft adapter bearing; 2. The right-angle shaft power transmission device according to claim 1, further comprising:

15. The input shaft assembly includes: a motor mounting plate on which the motor is mounted; a clamp that fastens a motor shaft of the motor to the input shaft adapter; a clamp tightening bolt for tightening the clamp; 15. The right angle shaft power transmission device of claim 14, further comprising:

16. The output shaft assembly includes: an output shaft structure connected to the other side of the main structure assembly; a plurality of output shaft fixing bolts for fixing the output shaft structure to the main structure assembly; an output shaft adapter connected to the other side of the power transmission direction changing link assembly and configured to output the power transmitted from the power transmission direction changing link assembly; an output shaft adapter bearing disposed in the output shaft structure and supporting a rotational motion of the output shaft adapter; an output shaft adapter bearing preload plate for applying a preload to the output shaft adapter bearing; 2. The right-angle shaft power transmission device according to claim 1, further comprising:

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