JP2007225078A - Transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission enabling reduction of size of a device, silent operation at the time of driving, low vibration driving and reduction of price. <P>SOLUTION: The transmission includes an input part 11, connected with a power source, for inputting power, an output part 21, provided on a same axis with the input part 11, for changing speed of the power and output it to an outside part, an axial core middle gear shaft 50 provided at an axial core between the input part 11 and the output part 21, peripheral middle gear shafts 51a to 51d provided around the axial core and a plurality of gear set parts 61 to 67 in which spur gears 61a to 67a and pinions 61b to 67b are regarded as sets. The plurality of gear set parts 61 to 67 are meshed between the input part 11 and the output part 21 in a manner capable of changing speed and rotatably supported by the peripheral middle gear shafts 51a to 51d and the axial core middle gear shaft 50. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a small transmission that can be used in a digital photographing device or the like.

As a small-sized transmission, for example, parts are shared so that a planetary gear unit of each stage gear that determines the final reduction ratio can be selected, and each stage corresponding to the target reduction ratio with a small cylindrical diameter without using a bolt. A small reduction gear having specifications for various purposes is known at low cost by connecting the reduction gear units of this type (Patent Document 1).
JP 11-37226 A

  By the way, small transmissions using a motor as a drive source used in digital photographing equipment and the like are required to further reduce the size of the apparatus, reduce noise during driving, drive with low vibration, and reduce the price. In particular, small drive units that use a motor or the like used in digital photographing equipment as a drive source are required to have a small diameter due to restrictions imposed by the product layout and the shape of the drive source of the robot or the like from the built-in shape. Yes. Furthermore, as the equipment incorporating the unit becomes more sophisticated and multifunctional, it is required to reduce the drive sound of the transmission and reduce the vibration.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a transmission that can reduce the size of the device, reduce noise during driving, reduce vibration, and reduce the price.

  In order to solve the above problems and achieve the object, the present invention is configured as follows.

The invention described in claim 1
An input unit connected to a drive source for inputting power;
An output unit arranged coaxially with the input unit and shifting the power to the outside for output;
An axial center gear shaft disposed in an axial center between the input unit and the output unit;
A peripheral intermediate gear shaft disposed around the axis; and
A plurality of gear assembly parts including a spur gear and a pinion;
Including
The plurality of gear assembly parts are meshed so as to be able to shift between the input portion and the output portion, and are rotatably supported by the peripheral intermediate gear shaft and the shaft center intermediate gear shaft. It is a transmission.

The invention described in claim 2
The input unit has a drive gear of the drive source,
The transmission according to claim 1, wherein a drive gear of the drive source meshes with the gear assembly part on the input side.

The invention described in claim 3
The output unit has an output shaft,
The transmission according to claim 1 or 2, wherein a gear of the output shaft meshes with the gear assembly part on the output side.

The invention according to claim 4
The peripheral intermediate gear shaft is arranged at four positions on the concentric circumference around the axis and in the X-shape,
4. The drive source mounting hole is disposed outside the rotation range of the gear assembly component disposed on the peripheral intermediate gear shaft and at a position that is substantially symmetrical about the shaft center. The transmission according to any one of the above.

The invention described in claim 5
An input support cylinder for supporting the input unit;
An output support cylinder for supporting the output unit;
An intermediate support cylinder disposed between the input support cylinder and the output support cylinder;
Have
The peripheral intermediate gear shaft is supported by the input support cylinder, the intermediate support cylinder, and the output support cylinder,
5. The transmission according to claim 1, wherein the shaft center intermediate gear shaft has a multi-stage unit configuration in which the input support cylinder and the intermediate support cylinder support the shaft center intermediate gear shaft. is there.

The invention described in claim 6
The input support tube, the output support tube, and the intermediate support tube are formed of resin,
A metal ground plane is disposed between the input support cylinder and the intermediate support cylinder,
The transmission according to any one of claims 1 to 5, wherein a metal base plate is disposed between the output support cylinder and the intermediate support cylinder.

The invention described in claim 7
Extending a part of the at least one metal ground plane outside the outer shape of the multi-stage unit;
The transmission according to any one of claims 1 to 6, wherein the extended portion is an attachment portion.

  With the above configuration, the present invention has the following effects.

  In the first aspect of the present invention, the input portion and the output portion are coaxially arranged, the shaft center intermediate gear shaft is arranged at the shaft center between the input portion and the output portion, and the spur gear and the pinion are paired. A plurality of gear assembly parts are meshed so as to be able to shift between the input part and the output part, and are rotatably supported by the peripheral intermediate gear shaft and the shaft intermediate gear shaft. Gear shafts can be shared, and assembly is easy. Special equipment such as parts production and assembly, and adjustment on assembly are unnecessary, which can be realized. In addition, by using multiple gear assembly parts consisting of spur gears and pinions, mass production can be ensured with accuracy, enabling downsizing of the device, low noise during driving, low vibration drive, and low price. be able to.

  In the second aspect of the present invention, the input unit has a drive gear of the drive source, and the drive gear of the drive source meshes with the gear assembly on the input side, so that it can be connected to the drive source with a simple structure. it can.

  In the third aspect of the present invention, the output section has an output shaft, and the output gear of the output shaft meshes with the gear assembly on the output side, so that an external device or the like can be connected with a simple structure.

  In the invention according to claim 4, the peripheral intermediate gear shaft is arranged on the concentric circumference with the shaft center as the center and at four positions of the X-shape, so that a necessary gear ratio can be secured. In addition, a position outside the rotation range of the gear assembly parts arranged on the peripheral intermediate gear shaft and having a substantially symmetrical shape about the shaft center becomes a space, and the drive source mounting hole can be arranged in this space.

  In the fifth aspect of the invention, the peripheral intermediate gear shaft is supported by the input support tube, the intermediate support tube, and the output support tube, and the shaft center intermediate gear shaft is supported by the input support tube and the intermediate support tube. Since it is a supported multi-stage unit configuration and can be sealed, dust can be prevented during operation.

  In the invention according to claim 6, the input support cylinder, the output support cylinder, and the intermediate support cylinder are formed of resin, and a metal base plate is disposed between the input support cylinder and the intermediate support cylinder, and the output A metal ground plane is arranged between the support cylinder and the intermediate support cylinder, and a load applied to the peripheral intermediate gear shaft can be received by the metal ground plane. Therefore, there is strength, it is possible to ensure the gear spacing of the gear assembly parts, reduce vibrations, and improve the efficiency of power transmission.

  In the invention according to claim 7, at least one metal ground plane is extended outside the outer shape of the multistage unit, and the extended portion is used as an attachment portion, so that it can be easily and reliably attached to an external device or the like. Can be fixed. In particular, by using a part of the metal base plate as an attachment portion, it can be separated from the drive source and it is easy to secure an attachment space.

  Hereinafter, although the embodiment of the transmission of the present invention will be described, the embodiment of the present invention shows the most preferable embodiment of the present invention, and the present invention is not limited to this.

  First, the transmission will be described with reference to FIGS. 1 is a plan view of the transmission, FIG. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a development view of the transmission, and FIG. 4 is a gear assembly part of the transmission, a peripheral intermediate gear shaft, and a drive source. It is a figure which shows arrangement | positioning of an attachment hole.

  The transmission includes an input support cylinder 10 that supports the input unit 11, an output support cylinder 20 that supports the output unit 21, an intermediate support cylinder 30 that is disposed between the input support cylinder 10 and the output support cylinder 20, Have The input support cylinder 10, the output support cylinder 20, and the intermediate support cylinder 30 are formed of resin, and a metal base plate 40 is disposed between the input support cylinder 10 and the intermediate support cylinder 30, and the output support cylinder 20. And the metal ground plane 41 is arrange | positioned between the intermediate support cylinders 30. The input support cylinder 10, the intermediate support cylinder 30, and the output support cylinder 20 are formed in a cylindrical shape, but are not limited to this, and may be a square cylinder shape, an elliptical shape, or the like, and the metal base plates 40 and 41 are also cylindrical shapes. Although formed, it is not limited to this as well.

  The input unit 11 and the output unit 21 are arranged on the same axis, and the shaft center intermediate gear shaft 50 is arranged on the axis between the input unit 11 and the output unit 21. Around the shaft center, peripheral intermediate gear shafts 51a to 51d are arranged and made of metal. In this embodiment, the peripheral intermediate gear shafts 51a to 51d are arranged at four locations on the locus of concentric arcs parallel to the input / output shafts of the input portion 11 and the output portion 21 and with respect to the axis. 10, the metal base plate 40, the intermediate support cylinder 30, the metal base plate 41, and the output support cylinder 20 are used for support. Further, the shaft intermediate gear shaft 50 has a multi-stage unit configuration supported by the input support cylinder 10 and the intermediate support cylinder 30.

  Between the input part 11 and the output part 21, the some gear assembly parts 61-67 are meshed | engaged so that transmission is possible, and is arrange | positioned. The gear assembly parts 61 to 67 are a set of spur gears 61a to 67b and pinions 61b to 67b. In this embodiment, the spur gears 61a to 67b and the pinions 61b to 67b are integrally formed. It may be formed and assembled or joined and fixed. In addition, the gear assembly parts 61 to 67 are made of resin, the gear assembly parts 61 to 63 are made of resin, the gear assembly parts 64 to 67 are made of metal, and the resin parts and the metal parts are combined. It may be formed, or all may be formed of metal. The gear assembly parts 61 and 63 are rotatably supported by the peripheral intermediate gear shaft 51a, the gear assembly component 62 is rotatably supported by the peripheral intermediate gear shaft 51b, and the gear assembly component 64 is an axial center gear. The shaft assembly 50 is rotatably supported, the gear assembly parts 65 and 67 are rotatably supported by the peripheral intermediate gear shaft 51c, and the gear assembly component 66 is rotatably supported by the peripheral intermediate gear shaft 51d. Yes.

  In this embodiment, the pinion 61b of the gear assembly component 61 meshes with the spur gear 62a of the gear assembly component 62, the pinion 62b of the gear assembly component 62 meshes with the spur gear 63a of the gear assembly component 63, and the pinion of the gear assembly component 63 63b meshes with the spur gear 64a of the gear assembly component 64, the pinion 65b of the gear assembly 65 engages with the spur gear 66a of the gear assembly component 66, and the pinion 66b of the gear assembly component 66 engages with the spur gear 67a of the gear assembly component 67. It is a deceleration mechanism. In this embodiment, a plurality of gear assembly parts 61 to 67 having the same configuration are meshed so as to decelerate, but the present invention is not limited to this and meshing may be performed so as to increase the speed.

  The input unit 11 is connected to a drive source to input power, and in this embodiment, a motor 70 is used as the drive source. The drive shaft 71 of the motor 70 is provided with a pinion 72, and the pinion 72 meshes with the spur gear 61 a of the gear assembly component 61. As described above, the input unit 11 has the pinion 72 as a drive gear of the drive source, and the pinion 72 meshes with the spur gear 61a of the gear assembly 61 on the input side. As described above, the input unit 21 has the pinion 72 as the drive gear of the drive source, and the drive gear of the drive source meshes with the gear assembly 61 on the input side, thereby connecting to the drive source with a simple structure. Can do.

  The output unit 21 is arranged coaxially with the input unit 11 and is configured to shift and output power to the outside. In this embodiment, the output unit 21 has an output shaft 80. The output shaft 80 is supported by the output support cylinder 20 via a bearing 81, and the output shaft 80 has an output gear 80a. The output gear 80a meshes with the pinion 67b of the gear assembly 67 on the output side. Thus, the output unit 21 includes the output shaft 80, and the output gear 80a of the output shaft 80 meshes with the gear assembly 67 on the output side, so that an external device or the like can be connected with a simple structure.

  As shown in FIG. 4, the peripheral intermediate gear shafts 51 a to 51 d are arranged at four positions on a concentric circle around the axis and in the X shape. As shown in FIG. 2, the drive source mounting holes 90 and 91 are located outside the rotation range of the gear assembly parts 61 to 67 arranged on the peripheral intermediate gear shafts 51a to 51d and at positions that are substantially symmetrical about the shaft center. The output support cylinder 20, the output support cylinder base plate 45, the metal base plate 41, the intermediate support cylinder 30, the metal base plate 40, and the input support cylinder 10 are formed therethrough. As shown in FIG. 2, mounting screws 92 and 93 are inserted into the drive source mounting holes 90 and 91, and the mounting screws 92 and 93 are fastened and fixed to the motor 70. The mounting screws 92 and 93 are supported for output. The cylinder 20, the intermediate support cylinder 30, and the input support cylinder 10 are also fixed.

  Hereinafter, based on FIG. 3, the assembly method of the transmission of this embodiment will be described.

  First, the output support cylinder base plate 45 is inserted into the output support cylinder 20 into which the bearing 81 and the peripheral intermediate gear shafts 51a to 51d are press-fitted. The output gear 80a, the gear assembly 67, and the thrust adjusting washers 67c and 67d are inserted, and the metal base plate 41 is incorporated into the end of the output shaft 80 and the guides of the peripheral intermediate gear shafts 51a to 51d. Next, the gear assembly part 66 and the thrust adjustment washer 66c are inserted into the peripheral intermediate gear shaft 51d, the gear assembly component 65 and the thrust adjustment washer 65c are inserted into the peripheral intermediate gear shaft 51c, and the intermediate support cylinder 30 is inserted into the peripheral intermediate gear shaft 51c. Insert into guides 51a-51d.

  A metal base plate in which the gear assembly 67 is placed in a position where the shaft intermediate gear shaft 50 coaxial with the input portion 11 and the output portion 21 is inserted in the intermediate support cylinder 30 and the shaft intermediate gear shaft 50 is inserted. 40 is inserted into the guides of the peripheral intermediate gear shafts 51a to 51d.

  Next, the gear assembly component 63 is inserted into the peripheral intermediate gear shaft 51a, the gear assembly component 62 is inserted into the peripheral intermediate gear shaft 51b, the gear assembly component 61 is inserted into the peripheral intermediate gear shaft 51a, and the input support cylinder 10 is inserted into the peripheral intermediate gear shaft 51a. Insert into guides 51a-51d. Finally, the motor 70 in which the pinion 72 is driven is fixed to the drive source mounting holes 90 and 91 with two mounting screws 92 and 93.

  Next, rotation transmission of the incorporated transmission will be described. In FIG. 3, the rotation of the pinion 72 of the motor 70 is transmitted to the gear assembly component 61 inserted into the peripheral intermediate gear shaft 51a and the gear assembly component 62 inserted into the peripheral intermediate gear shaft 51b, and inserted into the peripheral intermediate gear shaft 51a. It is transmitted to the gear assembly part 63 made. Further, it is transmitted to the gear assembly part 64 inserted into the shaft center intermediate gear shaft 50 press-fitted into the metal base plate 40. Further, the gear assembly 65 is inserted into the peripheral intermediate gear shaft 51c, the gear assembly 66 is inserted into the peripheral intermediate gear shaft 51d, and the gear assembly 67 is inserted into the peripheral intermediate gear shaft 51c. 80a.

  5 and 6 show another embodiment of the transmission, FIG. 5 is a plan view of the transmission, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. This embodiment is configured in the same manner as the embodiment shown in FIGS. 1 to 4, except that at least one part of the metal ground plane is divided into three portions of 120 degrees of the metal ground plane 41 in this embodiment. Is extended outside the outer shape of the multi-stage unit, and the extended portion is used as a mounting portion 41a. The transmission of this embodiment extends outside the outer shape of the multi-stage unit, and the extended portion is used as the attachment portion 41a, so that it can be easily and reliably attached and fixed to an external device or the like. In particular, by using a part of the metal ground plate 41 as the attachment portion 41a, it can be separated from the drive source and it is easy to secure the attachment space.

  Further, the attachment of the transmission to another device has an advantage that the metal plate 41 integrated with the device can be deformed and used for the mounting portion 41a. The attachment part 41a of the metal base plate 41 is not limited to three places, and may be one place or a plurality of places such as two places, and the position and shape are not limited. Moreover, you may provide an attaching part in the metal base plate 40 similarly.

  Thus, in this invention, the input part 11 and the output part 21 are arrange | positioned coaxially, the axial center intermediate gear shaft 30 is arrange | positioned in the axial center between the input part 11 and the output part 21, and several same structure The gear assembly parts 61 to 67 are rotatably supported by the peripheral intermediate gear shafts 51 a to 51 d and the shaft center intermediate gear shaft 30, and are engaged with the input portion 11 and the output portion 21 so as to be capable of shifting. The gear assembly parts 61 to 67 and the peripheral intermediate gear shafts 51a to 51d can be made common, and assembling is easy, and special equipment such as parts production and assembly, and adjustment on assembly are unnecessary and can be realized. Further, by using gear assembly parts 61 to 67 including spur gears 61a to 67b and pinions 61b to 67b, mass production can be ensured with accuracy, downsizing of the device, noise reduction during driving, and low vibration driving, It is possible to reduce the price.

  Further, the peripheral intermediate gear shafts 51a to 51d are arranged at four positions on the concentric circumference centered on the shaft center and at the four X-shaped positions, so that a necessary gear ratio can be ensured. Further, a position that is outside the rotation range of the gear assembly parts 61 to 67 arranged on the peripheral intermediate gear shafts 51a to 51d and is substantially symmetrical about the shaft center is a space, and the drive source mounting holes 90 and 91 are located in this space. Can be arranged.

  The peripheral intermediate gear shafts 51a to 51d are supported by the input support cylinder 10, the metal base plate 40, the intermediate support cylinder 30, the metal base plate 41, and the output support cylinder 20, and the shaft center intermediate gear shaft 50 is input-supported. Since it is a multistage unit structure supported by the cylinder 10 and the intermediate support cylinder 30 and can be sealed, it is possible to prevent dust from being mixed during operation.

  Further, the input support cylinder 10, the output support cylinder 20, and the intermediate support cylinder 30 are formed of resin, and the metal base plate 40 is disposed between the input support cylinder 10 and the intermediate support cylinder 30, and the output support A metal ground plate 41 is disposed between the cylinder 20 and the intermediate support cylinder 30, and the metal ground plates 40 and 41 can receive loads applied to the peripheral intermediate gear shafts 51 a to 51 d. For this reason, the use of the metal base plates 40 and 41 provides strength, can ensure the gear spacing of the gear assembly parts 61 to 67, reduce vibrations, and improve the efficiency of power transmission.

  Further, in this embodiment, the peripheral intermediate gear shafts 51a to 51d are composed of four axes and the seven gear assembly parts 61 to 67 are configured. However, the peripheral intermediate gear shafts of the peripheral intermediate gear shafts can be achieved so as to achieve a necessary gear ratio. The number of shafts and the number of gear assembly parts can be set freely. Also, the gear assembly parts only need to have the same gear specifications as a set of spur gears and pinions. Each gear assembly part can freely set the number of teeth of the spur gears and pinions, and the shafts of the spur gears and pinions. The direction length can also be set freely.

  In addition, this transmission is used in digital photographing equipment and the like, and is not limited to a motor as a drive source, and a drive source such as a robot can also be used.

  The present invention can be applied to a small-sized transmission that can be used in digital photographing equipment and the like, and can be downsized, driven at low noise, driven at low vibration, and reduced in price.

It is a top view of a transmission. It is sectional drawing which follows the II-II line of FIG. It is an expanded view of a transmission. It is a figure which shows arrangement | positioning of the gear assembly part of a transmission, a periphery intermediate | middle gear shaft, and a drive source attachment hole. It is a top view of a transmission. It is sectional drawing which follows the VI-VI line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Input support cylinder 11 Input part 20 Output support cylinder 21 Output part 30 Intermediate support cylinders 40 and 41 Metal base plate 50 Center axis intermediate gear shafts 51a to 51d Peripheral intermediate gear shafts 61 to 67 Gear assembly parts 61a to 67b Spur gears 61b to 67b Pinion 70 Motor 71 Drive shaft 72 Pinion 80 Output shaft 80a Output gear 81 Bearing 90, 91 Drive source mounting hole 92, 93 Mounting screw

Claims (7)

An input unit connected to a drive source for inputting power;
An output unit arranged coaxially with the input unit and shifting the power to the outside for output;
An axial center gear shaft disposed in an axial center between the input unit and the output unit;
A peripheral intermediate gear shaft disposed around the axis; and
A plurality of gear assembly parts including a spur gear and a pinion;
Including
The plurality of gear assembly parts are meshed so as to be able to shift between the input portion and the output portion, and are rotatably supported by the peripheral intermediate gear shaft and the shaft center intermediate gear shaft. Transmission device. The input unit has a drive gear of the drive source,
The transmission according to claim 1, wherein a drive gear of the drive source meshes with the gear assembly part on the input side. The output unit has an output shaft,
The transmission according to claim 1 or 2, wherein a gear of the output shaft meshes with the gear assembly part on the output side. The peripheral intermediate gear shaft is arranged at four positions on the concentric circumference around the axis and in the X-shape,
4. The drive source mounting hole is disposed outside the rotation range of the gear assembly component disposed on the peripheral intermediate gear shaft and at a position that is substantially symmetrical about the shaft center. The transmission according to any one of the above. An input support cylinder for supporting the input unit;
An output support cylinder for supporting the output unit;
An intermediate support cylinder disposed between the input support cylinder and the output support cylinder;
Have
The peripheral intermediate gear shaft is supported by the input support cylinder, the intermediate support cylinder, and the output support cylinder,
The transmission according to any one of claims 1 to 4, wherein the shaft center intermediate gear shaft has a multi-stage unit configuration in which the input support tube and the intermediate support tube support the shaft center intermediate gear shaft. The input support tube, the output support tube, and the intermediate support tube are formed of resin,
A metal ground plane is disposed between the input support cylinder and the intermediate support cylinder,
The transmission according to any one of claims 1 to 5, wherein a metal ground plate is disposed between the output support cylinder and the intermediate support cylinder. Extending a part of the at least one metal ground plane outside the outer shape of the multi-stage unit;
The transmission according to any one of claims 1 to 6, wherein the extended portion is an attachment portion.