WO2017188483A1

WO2017188483A1 - Power-transferring device and camera-supporting device comprising same

Info

Publication number: WO2017188483A1
Application number: PCT/KR2016/004513
Authority: WO
Inventors: 김성묵; 이현욱; 김낙유; 최주용
Original assignee: 주식회사 에스 피 지
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2017-11-02
Also published as: KR101817885B1; KR20170133239A

Abstract

A power-transferring device and a camera-supporting device comprising same are disclosed. The power-transferring device may comprise: a motor for generating power; a driving worm gear rotated by the motor; a first worm wheel rotated by being engaged with the driving worm gear; a belt connected to the driving worm gear and receiving the power; a driven worm gear rotated by being connected to the belt; and a second worm wheel connected to the first worm wheel and rotated by being engaged with the driven worm gear.

Description

Power transmission mechanism and camera support device comprising the same

Hereinafter, a power transmission mechanism and a camera support device including the same are disclosed.

The worm gear and the worm wheel do not intersect while their respective axes of rotation are perpendicular to each other. If a single threaded worm gear makes one turn, the worm wheel engaged with it rotates by one. For example, if the worm wheel has 50 teeth and the worm gear is a single thread, the reduction ratio is 50: 1. The reduction ratios achieved by spur gears can be no more than 10: 1 and occupy a large space. Therefore, the worm gear and the worm wheel are used in a reduction device that can obtain a very large reduction ratio compared to the space occupied. In addition, it is used as a device for rotating the worm wheel by driving the worm gear and reverse driving is not possible. That is, the worm gear does not rotate by rotating the worm wheel.

Backlash is a gap made in the direction of movement in a device in which gears and the like used in a machine such as worm gears and worm wheels are engaged with each other. However, due to such backlash, when the worm gear and the worm wheel rotating in one direction rotate in opposite directions, they may be displaced or impacted. Backlash is increased by wear, causing vibration or noise and reducing the life of the machine.

Self-locking refers to a state in which a screw does not release itself by itself even if the screw is released, that is, without external force, and can be implemented in a mechanism that engages the worm gear and the worm wheel.

For example, Japanese Patent Laid-Open No. 3207048 discloses a power transmission mechanism of a camera fixing stand apparatus that reduces the backlash of a worm gear.

An object according to an embodiment is to provide a power transmission mechanism for reducing backlash and a camera support including the same.

An object according to an embodiment is to provide a power transmission mechanism for performing self-locking and a camera support including the same.

According to one or more embodiments, a power transmission mechanism includes a motor generating power, a drive worm gear rotated by the motor, a first worm wheel rotating in engagement with the drive worm gear, a belt connected to the drive worm gear to receive power, and the belt It may include a driven worm gear connected to the rotation and the second worm wheel connected to the first worm wheel and rotated in engagement with the driven worm gear.

According to one side, the power transmission mechanism may further include a tensioner for applying tension to the belt.

According to one side, the tensioner may include an idler in contact with the belt.

According to one side, the tensioner may be adjustable position.

According to one side, the power transmission mechanism, a backlash measuring sensor for measuring the backlash between the drive worm gear and the first worm wheel or the driven worm gear and the second worm wheel, a control unit for determining the position of the tensioner and the tensioner determined by the control unit The moving block for moving the tensioner based on the position of the may further include.

According to one side, the backlash measuring sensor may be one of an encoder or an optical sensor for measuring the rotation angle.

According to one side, the belt, the drive worm gear and the driven worm gear can be connected in common in internal connection.

According to one or more exemplary embodiments, a camera support apparatus includes a support for supporting a camera, a first worm wheel connected to the support, a second worm wheel connected to the first worm wheel, a driving worm gear engaged with the first worm wheel, and the first worm wheel. It may include a driven worm gear disposed on the opposite side of the drive worm gear and engaged with the second worm wheel, a belt connected in common contact between the drive worm gear and the driven worm gear and a motor for providing power to the drive worm gear. .

According to one side, the camera support device may further include a tensioner disposed adjacent to the belt and tensioning.

According to one side, the tensioner may be adjustable position.

The power transmission mechanism and the camera support apparatus according to the embodiment can reduce the backlash generated between the worm gear and the worm wheel.

The power transmission mechanism and the camera support apparatus according to the embodiment can prevent the displacement or impact caused by the rotation direction of the worm gear is switched.

The power transmission mechanism and the camera support apparatus according to the embodiment implement self-locking by the structure of the worm gear and the worm wheel, thereby preventing the worm wheel and its associated components from moving by external force.

Effects of the power transmission mechanism and the camera support including the same according to one embodiment are not limited to those mentioned above, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a perspective view of a camera support including a power transmission mechanism according to one embodiment.

2 is a plan view of a camera support including a power transmission mechanism according to an embodiment.

3 is a front view of a camera support including a power transmission mechanism according to one embodiment.

4A-4C are front views illustrating various embodiments of a camera support including a power transmission mechanism according to one embodiment.

FIG. 5 is a block diagram illustrating a method of adjusting a position of a tensioner of a camera support including a power transmission mechanism according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Components included in any one embodiment and components including common functions will be described using the same names in other embodiments. Unless stated to the contrary, the description in any one embodiment may be applied to other embodiments, and detailed descriptions thereof will be omitted in the overlapping range.

1 is a perspective view of a camera support including a power transmission mechanism according to an embodiment, and FIG. 2 is a plan view of a camera support including a power transmission mechanism according to an embodiment. With reference to FIG. 1 and FIG. 2, the structure and function of the power transmission mechanism 1 are demonstrated. The thick arrows shown in FIG. 2 indicate the direction of rotation, and the dashed arrows indicate the direction of tension when tension is applied to the belt 40 by the tensioner 70 to be described below.

The power transmission mechanism 1 is connected to a motor 10 that generates power, a drive worm gear 20 that rotates by the motor, a first worm wheel 30 that rotates in engagement with the drive worm gear, and the drive worm gear. It may include a belt 40 receiving the transmission, the driven worm gear 50 is connected to the belt rotates and the second worm wheel 60 is connected to the first worm wheel and rotated in engagement with the driven worm gear.

The motor 10 may use various kinds of motors according to the use environment or the purpose of use. For example, a geared motor may be used to change the rotation direction of the first worm wheel 30 and the second worm wheel 60 connected to the first worm wheel 30. When the motor 10 is driven, power generated from the motor 10 may be transmitted to the driving worm gear 20.

The drive worm gear 20 may rotate by the power transmitted from the motor 10. The rotation direction of the drive worm gear 20 may correspond to the rotation direction of the motor 10. For example, when the motor 10 rotates clockwise with respect to the front of FIG. 1, the driving worm gear 20 may rotate clockwise with respect to the front of FIG. 1. In addition, the drive worm gear 20 may transmit power to the belt 40 connected to the drive worm gear, and the belt 40 may rotate corresponding to the direction in which the drive worm gear 20 rotates. For example, when the driving worm gear 20 rotates clockwise with respect to the front of FIG. 1, the belt 40 may rotate clockwise with respect to the front of FIG. 1.

The driving worm gear 20 is clockwise with respect to the front of FIG. 1 toward the first direction of the screw 10 or counterclockwise with respect to the front of FIG. 1 as it moves away from the motor 10. It may be provided with a second direction thread that proceeds. Hereinafter, a case in which the drive worm gear 20 includes the first direction thread will be described.

The power transmission mechanism 1 may be connected with the drive worm gear 20 having a diameter larger than the diameter of the drive worm gear 20 in order to have a clearance for adjusting the position of the tensioner 70 to be described below. It may include a pulley that can be coupled to the belt 40.

The first worm wheel 30 may rotate in engagement with the driving worm gear 20. When the driving worm gear 20 is rotated clockwise by the motor 10 based on the front surface of FIG. 1, the first worm wheel 30 may be rotated clockwise based on the plane of FIG. 1.

The belt 40 may be connected to the driving worm gear 20 to receive power according to the rotation of the driving worm gear 20. The belt 40 may include a timing belt. The timing belt is a belt having grooves of equal intervals therein so as to precisely engage grooves of a pulley having equally spaced grooves, such as gears, so that the rotation of the driving worm gear 20 can be transmitted with high efficiency. The belt 40 may be directly connected to the driving worm gear 20 and the driven worm gear 50 to be described below, but is connected to the pulley connected to the driving worm gear 20 and the pulley connected to the driven worm gear 50 to be described below. The power of the driving worm gear 20 can be transmitted to the driven worm gear 50.

The driven worm gear 50 may be connected to the belt 40 and rotate. The rotational direction of the driven worm gear 50 may correspond to the rotational direction of the belt 40. For example, when the driving worm gear 20 rotates clockwise with respect to the front of FIG. 1, the belt 40 rotates clockwise with respect to the front of FIG. 1, and thus the driven worm gear 50 is shown in FIG. 1. Can rotate clockwise relative to the front of 1.

The driven worm gear 50 may include a thread in a different direction from the driving worm gear 20. For example, when the drive worm gear 20 has a first direction thread, the driven worm gear 50 may have a second direction thread.

The power transmission mechanism 1 may be connected with the driven worm gear 50 having a diameter larger than the diameter of the driven worm gear 50 so as to have a clearance for adjusting the position of the tensioner 70 to be described below. It may include a pulley that can be coupled to the belt 40.

As shown, the pulley of the driving worm gear 20 and the pulley of the driven worm gear 50 may be the same size. However, when the diameter of the worm wheel or the diameter of the worm gear is changed, the diameter of the pulley that can be connected to the driving worm gear 20 or the pulley that can be connected to the driven worm gear 50 may be changed accordingly.

The second worm wheel 60 may be connected to the first worm wheel 30 and may rotate in engagement with the driven worm gear 50. The second worm wheel 60 may be coupled to share the same axis by the support 80. In addition, the second worm wheel 60 may be integrally formed with the first worm wheel 30.

The second worm wheel 60 may be engaged with the driven worm gear 50 and rotate in the same direction as the first worm wheel 30. For example, when the driving worm gear 20 having the thread in the first direction rotates clockwise with respect to the front of FIG. 1, the first worm wheel may rotate clockwise with respect to the plane of FIG. 1. The second worm wheel may be connected to the first worm wheel and rotate in a clockwise direction based on the plane of FIG. 1. A driven worm gear 50 having a thread in the second direction may also rotate clockwise with respect to the front of FIG. 1 by power transmitted by a belt connected to the drive worm gear 20, and the second worm wheel 60. The silver meshes with the driven worm gear 50 to rotate clockwise with respect to the plane of FIG. 1.

3 is a front view of a camera support including a power transmission mechanism according to one embodiment. With reference to FIG. 2 and FIG. 3, the structure and function of the tensioner 70 of the power transmission mechanism 1 are demonstrated.

The tensioner 70 may apply tension to the belt 40. By tensioning the belt 40, the tensioner 70 can reduce the backlash between the driving worm gear 20 and the first worm wheel 30 or the backlash between the driven worm gear 50 and the second worm wheel 60.

The tensioner 70 may include a cylindrical idler rotatable in contact with the belt 40. According to the idler, the friction force generated when the belt 40 is driven can be reduced. In addition, according to the cylindrical idler, the portion in contact with the belt 40 has a curved surface, so that the durability of the belt 40 can be improved by keeping the driving path of the belt 40 smooth.

4A-4C are front views illustrating various embodiments of a camera support including a power transmission mechanism according to one embodiment. 4A to 4C, various embodiments of the arrangement of the drive worm gear 20, the driven worm gear 50, the belt 40, and the tensioner 70 will be described.

Referring to FIG. 4A, a driving worm gear 20 and a driven worm gear 50 and a belt 40 common to the driving worm gear and the driven worm gear are arranged on the same side with respect to the support 80.

For example, the drive worm gear 20 having the screw thread in the first direction rotates in the clockwise direction by receiving the power of the motor 10, and the belt 40 watches the same in accordance with the rotation of the drive worm gear 20. Direction, and the driven worm gear 50 may rotate clockwise according to the rotation of the belt 40. In this case, the driven worm gear 50 may be provided with a screw thread in the first direction so that the first worm wheel 30 and the second worm wheel 60 rotate in the same direction.

When the tensioner 70 applies tension to the belt 40, tension is applied to the belt 40 in the direction opposite to the rotation direction of the drive worm gear 20 and in the same direction as the rotation direction of the driven worm gear 50.

Referring to FIG. 4B, the drive worm gear 20 and the driven worm gear 50 disposed on the opposite side with respect to the support 80 are shown, and the belt 40 inscribed in common with the drive worm gear and the driven worm gear is illustrated.

For example, the drive worm gear 20 having the thread in the first direction is rotated in the clockwise direction by receiving the power of the motor 10, and the belt 40 is rotated in the clockwise direction according to the rotation of the drive worm gear 20. Rotating, driven worm gear 50 can be rotated counterclockwise in accordance with the rotation of the belt (40). In this case, the driven worm gear 50 may be provided with a screw thread in the first direction so that the first worm wheel 30 and the second worm wheel 60 rotate in the same direction.

When the tensioner 70 applies tension to the belt 40, tension is applied to the belt 40 in the same direction as the rotation direction of the drive worm gear 20 and in a direction opposite to the rotation direction of the driven worm gear 50.

Referring to FIG. 4C, the drive worm gear 20 and the driven worm gear 50 disposed on the same side with respect to the support 80 are illustrated with a belt 40 inscribed in common with the drive worm gear and the driven worm gear.

For example, the drive worm gear 20 having the screw thread in the first direction rotates in the clockwise direction by receiving the power of the motor 10, and the belt 40 watches the same in accordance with the rotation of the drive worm gear 20. Direction, and the driven worm gear 50 may rotate counterclockwise as the belt 40 rotates. In this case, in order for the first worm wheel 30 and the second worm wheel 60 to rotate in the same direction, the driven worm gear 50 may include a first direction thread.

Referring to FIG. 5, the power transmission mechanism 1 includes a backlash measuring sensor 100 measuring a backlash between the driving worm gear 20 and the first worm wheel 30 or the driven worm gear 50 and the second worm wheel 60. It may include a control unit 110 for determining the position of the tensioner 70 and a moving block 120 for adjusting the position of the tensioner 70 based on the position of the tensioner 70 determined by the control unit 110.

The backlash measuring sensor 100 may include an encoder or an optical sensor for measuring a rotation angle. For example, the backlash measuring sensor 100 emits light at a portion engaged between gears to measure backlash between the driving worm gear 20 and the first worm wheel 30 or the backlash between the driven worm gear 50 and the second worm wheel 60. The irradiated and returned light can be received to obtain a video image. The rotation angle between the gears may be measured from the acquired image image, and the measured rotation angle value may be transmitted to the controller 110.

The controller 110 may determine the position of the tensioner 70 for applying tension to the belt 40 based on the measured rotation angle value. The position value of the tensioner 70 may be predetermined to correspond to the measured rotation angle value. In addition, although not shown, the power transmission mechanism 1 may receive a motor rotation speed or a motor torque value from a user in order to adjust the rotation angles of the first worm wheel 30 and the second worm wheel 60. The 110 may control the motor 10 by determining the motor rotation speed or the motor torque. Accordingly, the motor may rotate according to the motor rotation speed or the motor torque determined from the controller 110.

The moving block 120 may adjust the position of the tensioner 70 based on the position of the tensioner 70 determined by the controller 110. For example, the moving block 120 may be a linear guide moving linearly. In addition, the tensioner 70 may be connected to the moving block 120 to apply tension to the belt 40 as the moving block 120 moves.

Referring again to FIG. 1, the shape of the camera support apparatus 1 including the power transmission mechanism according to one embodiment will be described.

The camera support device 1 includes a support 80 for supporting the camera, a first worm wheel 30 connected to the support, a second worm wheel 60 connected to the first worm wheel, and a first worm wheel engaged with the first worm wheel. A drive worm gear 20, a driven worm gear 50 disposed on the opposite side of the drive worm gear with respect to the first worm wheel and engaged with the second worm wheel, and in common contact between the drive worm gear and the driven worm gear 40 And it may include a motor 10 for providing power to the drive worm gear.

The axis of rotation of the first worm wheel 30 and the axis of rotation of the second worm wheel 60 may be coaxial with the axis of rotation of the support 80, and the first worm wheel 30 and the second worm wheel 60 are supported by the support 80. It may be spaced apart and connected at predetermined intervals.

The belt 40 may be connected to one side of the driving worm gear 20 and one side of the driven worm gear 50 in common, or may be connected to the pulley of the driving worm gear 20 and the pulley of the driven worm gear 50 in common. . The manner in which the belts 40 are in contact with each other in common may include a manner in which the belt 40 is connected in common or in common.

The driven worm gear 50 may be disposed on the opposite side of the driving worm gear 20 with respect to the first worm wheel 30 and may be engaged with the second worm wheel 60, but the driving worm gear 20 with respect to the first worm wheel 30. It is disposed on the same side of the can be engaged with the second worm wheel (60). In this case, in order to make the rotation directions of the first worm wheel 30 and the second worm wheel 60 the same, the thread directions of the driving worm gear 20 and the driven worm gear 50 may be determined.

The camera support device 1 may also include a tensioner 70 disposed adjacent to the belt 40 and applying tension. For example, the tensioner 70 may be disposed outside or within the contact surface of the belt 40. As shown in FIG. 1, the tensioner 70 may exert a tension on the belt 40 from the outside of the contact surface of the belt 40 to the inside, and although not shown, the belt may face outward from the inside of the contact surface of the belt 40. Tension can be applied to 40.

The tensioner 70 may be adjustable position. The amount of tension applied to the belt 40 may be adjusted by adjusting the position of the tensioner 70 disposed adjacent to the belt 40. For example, in consideration of the movable range of the tensioner 70, the tensioner 70 may be disposed outside the contact surface of the belt 40 to adjust the position toward the inside of the contact surface.

Hereinafter, the operation of the camera support device 1 including the power transmission mechanism according to an embodiment will be described by way of example with reference to FIGS. 1 and 2.

In order for the user to adjust the rotation angle of the support 80 to which the camera can be connected, the camera support device 1 including the power transmission mechanism may receive a motor rotation speed value or a motor torque value from the user.

The controller 110 may rotate the motor 10 in a clockwise direction based on the front side of FIG. 1 based on the motor rotation speed value or the motor torque value input from the user.

As the motor 10 rotates clockwise with respect to the front side of FIG. 1, the driving worm gear 20 having a thread in the first direction connected to the motor 10 may rotate clockwise with respect to the front side of FIG. 1. Can be.

As the drive worm gear 20 rotates clockwise with respect to the front of FIG. 1, the first worm wheel 30 engaged with the drive worm gear 20 may rotate clockwise with respect to the plane (or FIG. 2) of FIG. 1. Can be.

As the drive worm gear 20 rotates clockwise with respect to the front of FIG. 1, the belt 40 connected to the drive worm gear 20 may rotate clockwise with respect to the front of FIG. 1, and the belt 40 As the clockwise rotation with respect to the front of FIG. 1, the driven worm gear 50 may rotate clockwise with respect to the front of FIG. 1.

As the driven worm gear 50 rotates clockwise with respect to the front of FIG. 1, the second worm wheel 60 engaged with the driven worm gear 50 and connected to the first worm wheel 30 is in the plane of FIG. 1 (or FIG. 2). Can be rotated clockwise.

In some cases, it is necessary to change the rotational direction of the support 80 supporting the camera, so that the rotational direction of the motor 10 can be switched. In this case, a displacement or an impact phenomenon may occur due to the backlash between the worm gear and the worm wheel, and in order to prevent this, a tensioner 70 for applying tension to the belt 40 to reduce the backlash between the worm gear and the worm wheel may be applied to the belt 40. Can be arranged adjacently.

When the tensioner 70 applies tension to the belt 40, the backlash measuring sensor 100 may measure the backlash between the worm gear and the worm wheel in order to measure the backlash reduction degree. In detail, the backlash measuring sensor 100 receives the light returned from the irradiation to obtain a video image to transmit the degree of backlash reduction between the worm gear and the worm wheel to the controller 110.

The control unit 110 may determine the position of the tensioner 70 to adjust the tension applied to the belt 40 according to the degree of backlash reduction.

The moving block 120 may move the tensioner 70 according to the position of the tensioner 70 determined from the controller 110, and accordingly, the tension applied to the belt 40 by the tensioner 70 may be adjusted. Accordingly, the backlash between the worm gear and the worm wheel can be adjusted.

According to an embodiment, a power transmission mechanism and a camera support device including the same include two worm gears and two worm wheels in a balanced manner, transmit power by a belt, and apply tensioner to the belt to adjust tension to control the worm gear and the worm wheel structure. It is possible to reduce the backlash generated and to transmit power stably, to prevent misalignment or impact from the backlash between the worm gear and the worm wheel according to the change of direction of the motor, or to realize self-locking from the structure of the worm gear and the worm wheel. There is an advantage that it can.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the following claims.

Claims

A motor for generating power;

A drive worm gear rotated by the motor;

A first worm wheel engaged with the driving worm gear and rotating;

A belt connected to the driving worm gear to receive power;

A driven worm gear connected to the belt and rotating; And

A second worm wheel connected to the first worm wheel and rotating in engagement with the driven worm gear;

Power transmission mechanism comprising a.
The method of claim 1,

And a tensioner for tensioning the belt.
The method of claim 2,

The tensioner includes a idler in contact with the belt.
The method of claim 2,

The tensioner is position adjustable power transmission mechanism.
The method of claim 4, wherein

A backlash measuring sensor for measuring a backlash between the driving worm gear and the first worm wheel or the driven worm gear and the second worm wheel;

A control unit to determine a position of the tensioner; And

A moving block for moving the tensioner based on the position of the tensioner determined by the controller;

A power transmission mechanism further comprising.
The method of claim 5,

The backlash measuring sensor is a power transmission mechanism of one of an encoder or an optical sensor for measuring the rotation angle.
The method of claim 1,

The belt is a power transmission mechanism connected in common between the drive worm gear and the driven worm gear.
Support for supporting the camera;

A first worm wheel connected to the support;

A second worm wheel connected to the first worm wheel;

A drive worm gear engaged with the first worm wheel;

A driven worm gear disposed on an opposite side of the driving worm gear with respect to the first worm wheel and engaged with the second worm wheel;

A belt connected in common between the driving worm gear and the driven worm gear; And

A motor providing power to the drive worm gear;

Camera support device comprising a.
The method of claim 8,

And a tensioner disposed adjacent and tensioning the belt.
The method of claim 9,

The tensioner is a camera support device that can adjust the position.