CN214799188U - Friction transmission device and motor device - Google Patents
Friction transmission device and motor device Download PDFInfo
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- CN214799188U CN214799188U CN202121084535.3U CN202121084535U CN214799188U CN 214799188 U CN214799188 U CN 214799188U CN 202121084535 U CN202121084535 U CN 202121084535U CN 214799188 U CN214799188 U CN 214799188U
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- washer
- peripheral surface
- gear
- rotating shaft
- outer peripheral
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 230000002093 peripheral effect Effects 0.000 claims abstract description 119
- 239000002184 metal Substances 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004080 punching Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
A friction transmission device and a motor device including the friction transmission device contribute to exerting the elastic action of a washer whose inner peripheral edge is riveted by a riveting portion. The utility model discloses a friction drive includes: a rotating shaft; a gear rotatably fitted on the shaft; and a first washer and a second washer which are respectively sleeved on the rotating shaft in a non-rotatable manner, wherein the first washer abuts against the gear from a first side in the axial direction, the second washer abuts against the gear from a second side in the axial direction, the second washer is provided with a second washer through hole through which the rotating shaft penetrates, the rotating shaft is provided with a riveting part formed by punching the rotating shaft, the periphery of the second washer through hole is pressed by the riveting part from the second side, wherein the end part of the second side of the inner peripheral surface of the second washer through hole abuts against the outer peripheral surface of the rotating shaft, and a gap is formed between the end part of the first side of the inner peripheral surface of the second washer through hole and the outer peripheral surface of the rotating shaft, so that the second washer can rotate around the end part towards the first side when the second washer is separated from the gear.
Description
Technical Field
The utility model relates to a friction drive and including friction drive's motor means.
Background
Conventionally, there is a friction transmission device, as shown in fig. 7, including: a rotating shaft 110X; the gear 120X is sleeved on the rotating shaft 110X in a rotatable manner; and a first washer 130X and a second washer 140X, the first washer 130X and the second washer 140X being respectively fitted to the rotation shaft 110X in a non-rotatable manner, the first washer 130X abutting against the gear 120X from a first side in the axial direction (upper side in fig. 7), the second washer 140X abutting against the gear 120X from a second side in the axial direction (lower side in fig. 7), the second washer 140X having a second washer through hole 141X through which the rotation shaft 110X passes, the rotation shaft 110X having a rivet portion 112X formed by deforming a part of the rotation shaft 110X by pressing the rotation shaft 110X from the second side in the axial direction, a peripheral edge of the second washer through hole 141X being pressed by the rivet portion 112X from the second side in the axial direction.
However, in the friction transmission device described above, after the caulking portion 112X is formed by pressing, the caulking portion 112X bites the second washer 140X, and therefore, the elastic force action of the second washer 140X cannot be effectively exerted.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems, and an object of the present invention is to provide a friction transmission device and a motor device including the friction transmission device, which contribute to the exertion of the elastic force of a washer in which an inner peripheral edge is riveted by a caulking portion.
In order to achieve the above object, the present invention provides a friction transmission device, including: a rotating shaft; the gear is sleeved on the rotating shaft in a rotatable mode; and a first washer and a second washer, which are respectively sleeved on the rotating shaft in a non-rotatable manner, the first washer abuts against the gear from a first side in the axial direction, the second washer abuts against the gear from a second side in the axial direction, the second washer has a second washer through hole through which the rotary shaft passes, the rotary shaft has a rivet formed by pressing the rotary shaft, a peripheral edge of the second washer through hole is pressed from the second side by the rivet, wherein an end portion of the second side of the inner peripheral surface of the second washer through hole abuts against the outer peripheral surface of the rotating shaft, a gap is formed between an end portion of the first side of the inner peripheral surface and the outer peripheral surface so that the second washer as a whole can rotate toward the first side about the end portion when the second washer is separated from the gear.
Here, the "axial direction" is based on the rotation center line of the rotating shaft.
According to the present invention, the end portion of the second side of the inner peripheral surface of the second washer through hole abuts against the outer peripheral surface of the rotary shaft, and a gap is formed between the portion of the first side of the inner peripheral surface of the second washer through hole and the outer peripheral surface of the rotary shaft, so that the second washer as a whole can be rotated around the end portion toward the first side when the second washer is separated from the gear (for example, when the friction transmission device is disassembled), and therefore, the elastic action of the second washer is facilitated to be exerted, and therefore, the friction torque between the gear and the second washer can be easily and stably ensured for a long period of time.
In the friction transmission device according to the present invention, it is preferable that a recess is formed in a position of the outer peripheral surface facing the inner peripheral surface of the second washer through hole, or a recess mark formed by bonding facing side surfaces of the recess of the outer peripheral surface to each other is formed in a position of the outer peripheral surface facing the inner peripheral surface.
According to the utility model discloses a friction transmission is formed with sunkenly in the peripheral position department relative with the inner peripheral surface of second packing ring through-hole, perhaps, is formed with sunken vestige in the peripheral position department relative with the inner peripheral surface of periphery, and sunken vestige is that the sunken relative side of outer peripheral surface laminates each other and forms when the punching press, consequently, under the condition that forms riveting portion through carrying out the punching press to the axis of rotation, forms easily that the second packing ring is whole can wind tip towards first side pivoted state when second packing ring and gear separation.
In the friction transmission device according to the present invention, it is preferable that the gap extends from the end portion of the first side of the inner peripheral surface toward the second side by an amount corresponding to at least half of the axial length of the inner peripheral surface.
In the friction transmission device according to the present invention, it is preferable that only an end portion of the second side of the inner peripheral surface abuts against an outer peripheral surface of the rotating shaft.
In the friction transmission device according to the present invention, it is preferable that an outer peripheral edge of the caulking portion abuts against the second washer.
In the friction transmission device according to the present invention, it is preferable that an inner peripheral side of the second washer is closer to the first side than an outer peripheral side of the second washer.
In the friction transmission device of the present invention, it is preferable that the first washer has a first washer through hole through which the rotating shaft passes, and the rotating shaft has a support portion that supports a periphery of the first washer through hole from the first side.
In the friction transmission device according to the present invention, it is preferable that only the outer peripheral side of the first washer abuts against the gear, and only the outer peripheral side of the second washer abuts against the gear.
In the friction transmission device according to the present invention, it is preferable that the shaft is made of metal, the gear is made of resin, the first washer is made of metal, and the second washer is made of metal.
Further, in order to achieve the above object, the present invention provides a motor device including a motor portion and a gear train, wherein, including the friction transmission device described in any one of the above, a driving force of the motor portion is transmitted to the gear of the friction transmission device via the gear train to rotate the rotating shaft of the friction transmission device.
(effects of utility model)
According to the present invention, the end portion of the second side of the inner peripheral surface of the second washer through hole abuts against the outer peripheral surface of the rotary shaft, and a gap is formed between the end portion of the first side of the inner peripheral surface of the second washer through hole and the outer peripheral surface of the rotary shaft, so that the second washer as a whole can rotate toward the first side around the end portion when the second washer is separated from the gear.
Drawings
Fig. 1 is a side sectional view schematically showing a motor device according to an embodiment of the present invention.
Fig. 2 is a partial side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention, and shows a state in which a gear and a second washer are assembled.
Fig. 3 is a partially enlarged side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention.
Fig. 4 is a partial side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention, in which a solid line shows a state where the second washer is assembled with a gear, and a broken line shows a state where the second washer is separated from the gear.
Fig. 5 is a partial side sectional view schematically showing a friction transmission device in a motor device of a comparative example.
Fig. 6 is a partially enlarged side sectional view schematically showing a friction transmission device in a motor device of a comparative example.
Fig. 7 is a side sectional view illustrating a friction transmission device in a conventional motor device.
(symbol description)
1 Motor device
10 friction drive
110 rotating shaft
111 support part
112 riveted part
120 gear
121 first projection
122 second projection
129 Gear through hole
130 first gasket
131 first washer through hole
140 second gasket
141 second gasket through hole
141a end portion
20 motor part
21 stator
22 rotor
30 gear set
90 outer casing
91 bottomed tubular part
92 cover plate
SH1 large diameter part
SH2 first middle diameter part
SH3 second middle diameter part
SH4 small diameter part
GR1 cylindrical part
GR2 plate-shaped part
BR bearing
GP gap
TC dent trace
R1 return amount
R2 return amount
Amount of B1 warpage
Detailed Description
Next, a motor device according to an embodiment of the present invention will be described with reference to fig. 1 to 6, in which fig. 1 is a side sectional view schematically showing a motor device according to an embodiment of the present invention, fig. 2 is a partial side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention, and shows a state in which a gear and a second washer are assembled, fig. 3 is a partially enlarged side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention, fig. 4 is a partial side sectional view schematically showing a friction transmission device in a motor device according to an embodiment of the present invention, in which a solid line shows a state in which a second washer is assembled with a gear, a broken line shows a state in which a second washer is separated from a gear, fig. 5 is a partial side sectional view schematically showing a friction transmission device in a comparative example, fig. 6 is a partially enlarged side sectional view schematically showing a friction transmission device in a motor device of a comparative example.
Here, it is assumed that the extending direction of the rotation center line of the rotation shaft of the friction transmission device, that is, the axial direction coincides with the Z direction, and that the first side in the axial direction coincides with the Z1 direction side and the second side in the axial direction coincides with the Z2 direction side.
(integral Structure of Motor device)
As shown in fig. 1, the motor device 1 includes a friction transmission device 10, a motor part 20, and a gear set 30, wherein the friction transmission device 10 has a rotation shaft 110 and a gear 120, and a driving force of the motor part 20 is transmitted to the gear 120 of the friction transmission device 10 via the gear set 30, thereby rotating the rotation shaft 110 of the friction transmission device 10 by a friction torque.
Here, as shown in fig. 1, the motor device 1 includes a housing 90, the housing 90 is configured by a bottomed cylinder 91 and a cover plate 92 closing an opening of the bottomed cylinder 91, the main body of the friction transmission device 10, the motor part 20, and the gear train 30 are housed in a housing space surrounded by the bottomed cylinder 91 and the cover plate 92, a rotating shaft 110 of the friction transmission device 10 constitutes an output shaft of the motor device 1, and a part of the rotating shaft 110 protrudes from the housing space of the housing 90 to the outside through a through hole of the cover plate 92 for connection to an external device.
(Structure of Friction Transmission device)
As shown in fig. 1, the friction drive device 10 includes: a rotating shaft 110; a gear 120, wherein the gear 120 is rotatably sleeved on the rotating shaft 110; the first washer 130 and the second washer 140 are respectively sleeved on the rotating shaft 110 in a non-rotatable manner, the first washer 130 abuts against the gear 120 from the Z1 direction side (i.e., the first side in the axial direction), and the second washer 140 abuts against the gear 120 from the Z2 direction side (i.e., the second side in the axial direction). As shown in fig. 1, the second washer 140 has a second washer through hole 141 through which the shaft 110 passes, the shaft 110 has a caulking portion 112 formed by pressing the shaft 110 from the Z2 direction side, and the periphery of the second washer through hole 141 is pressed from the Z2 direction side by the caulking portion 112.
Here, as shown in fig. 1, the first washer 130 has a first washer through hole 131 through which the rotation shaft 110 passes, and the rotation shaft 110 has a support portion 111 that supports the peripheral edge of the first washer through hole 131 from the Z1 direction side.
As shown in fig. 1, in the rotation shaft 110, the support portion 111 is a stepped portion formed in the rotation shaft 110, and the caulking portion 112 is located on the Z2 direction side of the support portion 111. Specifically, the rotating shaft 110 is a stepped shaft made of metal, and includes a large-diameter portion SH1, a first intermediate-diameter portion SH2, a second intermediate-diameter portion SH3, and a small-diameter portion SH4, which are arranged in this order in the axial direction, wherein the large-diameter portion SH1 is rotatably supported by the cover plate 92 of the housing 90 via a bearing BR, the first intermediate-diameter portion SH2 is located on the Z2 direction side of the large-diameter portion SH1 and has a smaller diameter than the large-diameter portion SH1, the second intermediate-diameter portion SH3 is located on the Z2 direction side of the first intermediate-diameter portion SH2 and has a smaller diameter than the first intermediate-diameter portion SH2, the small-diameter portion SH4 is located on the Z2 direction side of the second intermediate-diameter portion SH3 and is supported by the housing 90 or a support member fixed in the housing 90 and has a smaller diameter than the second intermediate-diameter portion SH 3; a notch formed by cutting out a part of the large diameter portion SH1 in the circumferential direction is provided at the end portion of the large diameter portion SH1 on the Z1 direction side; also, a part of the first intermediate diameter portion SH2 in the circumferential direction is cut out to form a non-circular cross section; a stepped portion constituting the support portion 111 is formed at the boundary between the large diameter portion SH1 and the first intermediate diameter portion SH2, a caulking portion 112 is formed at an end portion of the first intermediate diameter portion SH2 close to the second intermediate diameter portion SH3, and an outer peripheral edge of the caulking portion 112 abuts against a peripheral edge of the second washer through hole 141 of the second washer 140.
As shown in fig. 1, in the gear 120, only the outer peripheral side of the first washer 130 abuts on the surface of the gear 120 on the Z1 direction side, and only the outer peripheral side of the second washer 140 abuts on the surface of the gear 120 on the Z2 direction side. Specifically, the gear 120 is made of resin and includes a cylindrical portion GR1 and a plate-shaped portion GR2, in which the cylindrical portion GR1 extends in the axial direction, gear teeth are formed on the outer circumferential surface of the cylindrical portion GR1, the plate-shaped portion GR2 extends from the center in the axial direction of the cylindrical portion GR1 toward the inner circumferential side, the thickness direction coincides with the axial direction, and a gear through hole 129 through which the rotating shaft 110 passes is provided in the center of the plate-shaped portion GR 2; a first protrusion 121 having an arc-shaped cross section is formed at a boundary between a portion on the Z1 direction side of the cylindrical portion GR1 and the plate-shaped portion GR2, an outer peripheral side of the first washer 130 abuts against the first protrusion 121, a second protrusion 122 having an arc-shaped cross section is formed at a boundary between a portion on the Z2 direction side of the cylindrical portion GR1 and the plate-shaped portion GR2, and an outer peripheral side of the second washer 140 abuts against the second protrusion 122; the first projection 121 and the second projection 122 are continuous rings around the rotation center line of the rotation shaft 110.
As shown in fig. 1, the first washer 130 is formed in a plate shape as a whole, and the thickness direction thereof coincides with the axial direction. Specifically, the first washer 130 is made of metal, the outer peripheral edge of the first washer 130 abuts against the first protrusion 121 of the gear 120 from the Z1 direction side, a non-circular first washer through hole 131 is provided at the center of the first washer 130, the first washer through hole 131 is inserted through a first intermediate diameter portion P2 having a non-circular cross section of the rotation shaft 110 so that the first washer 130 is not rotatable with respect to the rotation shaft 110, and the support portion 111 of the rotation shaft 110 presses the peripheral edge portion of the first washer through hole 131 from the Z1 direction side.
As shown in fig. 1, the second gasket 140 has a plate shape as a whole. Specifically, the second washer 140 is made of metal, the inner peripheral side of the second washer 140 is closer to the Z1 direction side than the outer peripheral side of the second washer 140, and a portion located on one side (for example, the left side or the right side in fig. 1) with respect to the rotation center line of the rotation shaft 110 is linear in shape inclined with respect to the Z direction in a cross section of the second washer 140 taken along the axial direction. In the second washer 140, when the caulking portion 112 is formed by press working the shaft 110, the inner peripheral portion of the second washer 140 is displaced in the Z1 direction by receiving a force from the caulking portion 112 from the Z2 direction side, and the second washer 140 is elastically deformed, and the outer peripheral portion of the second washer 140 is positioned on the outer peripheral side of the inner peripheral portion of the second washer 140 and abuts against the second boss 122 of the gear 120 from the Z2 direction side; a non-circular second washer through hole 141 is provided at the center of the second washer 140, and the second washer through hole 141 is inserted with a second middle diameter portion P3 having a non-circular cross section of the rotation shaft 110 so that the second washer 140 cannot rotate with respect to the rotation shaft 110.
(Structure of Motor section)
As shown in fig. 1, the motor portion 20 has a stator 21 and a rotor 22, wherein the rotor 22 is rotatable with respect to the stator 21.
Here, the stator 21 is fixed to the housing 90, and includes a stator core and a coil; the rotor 22 is provided on the inner peripheral side of the stator 21, and faces the stator with a gap therebetween on the inner peripheral side. Specifically, as shown in fig. 1, rotor 22 is supported at both ends by support shafts supported by casing 90 so as to be rotatable about an axis extending in the axial direction, and a pinion gear portion is formed on the Z1 direction side of the rotor body included in rotor 22.
(Structure of Gear train)
As shown in fig. 1, the gear set 30 includes a plurality of gears.
Here, the gear train 30 is a reduction gear train, and in the gear train 30, a plurality of gears are supported by support shafts supported by the housing 90 at both ends so as to be rotatable about axes extending in the axial direction. Specifically, as shown in fig. 1, among the plurality of gears included in the gear train 30, the most upstream gear is engaged with the pinion gear portion of the rotor 22, and the most downstream gear is engaged with the gear 120 of the friction transmission device 10, whereby the rotational driving force of the motor portion 20 is transmitted to the gear 120 of the friction transmission device 10 to rotate the rotation shaft 110.
(fitting structure of second gasket and rotation shaft 110)
As shown in fig. 2 to 4, the end 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 abuts against the outer peripheral surface of the rotating shaft 110, and a gap GP is formed between the end on the Z1 direction side of the inner peripheral surface of the second washer through hole 141 and the outer peripheral surface of the rotating shaft 110, so that the entire second washer 140 can rotate in the Z1 direction around the end 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 when the second washer 140 is separated from the gear 120 (see the solid line in fig. 4).
Here, the gap GP preferably extends from the end portion on the Z1 direction side of the inner peripheral surface of the second washer through hole 141 toward the Z2 direction side by an amount equivalent to at least half the axial length of the inner peripheral surface of the second washer through hole 141 (in the illustrated example, only the end portion on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 abuts the outer peripheral surface of the rotation shaft 110).
As shown in fig. 3, a depression mark TC is formed on the outer peripheral surface of the shaft 110 at a position facing the inner peripheral surface of the second washer through hole 141, the depression mark TC being formed by deforming a depression formed on the outer peripheral surface of the shaft 110 before the shaft 110 is pressed to form the caulking portion 112, specifically, being formed by the facing side surfaces of the depression being adhered to each other when the caulking portion 112 is pressed to form the shaft 110.
(main effect of the present embodiment)
According to the motor apparatus 1 of the present embodiment, in the friction transmission device 10 including the rotation shaft 110, the gear 120, the first washer 130, and the second washer 140, the end 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 abuts against the outer peripheral surface of the rotation shaft 110, and the gap GP is formed between the end on the Z1 direction side of the inner peripheral surface of the second washer through hole 141 and the outer peripheral surface of the rotation shaft 110, so that the entire second washer 140 can rotate around the end 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 toward the Z1 direction when the second washer is separated from the gear 120, and therefore, the spring action of the second washer 140 is facilitated to be exerted, and thereby the friction torque between the gear 120 and the second washer 140 can be easily and stably secured for a long period of time. Specifically, according to the motor device 1 of the present embodiment, as shown in fig. 2 and 4, the outer peripheral edge of the second washer 140 can generate a large return amount R1 (the return amount R1 is equal to the warping amount B1 of the outer peripheral edge of the washer 140 in fig. 2) when the second washer 140 is separated from the gear 120, while the larger the return amount R1 is, the larger the spring force of the second washer 140 is, the larger the friction torque between the gear 120 and the second washer 140 is (the vertical resisting force for generating the friction torque is, the spring force of the second washer 40) is, and therefore, the spring force action of the second washer 140 can be effectively exerted, thereby stably securing the friction torque between the gear 120 and the second washer 140 for a long period of time; on the other hand, as shown in fig. 5 and 6, when the caulking portion 112 is formed by pressing the shaft 110, the end portion on the Z1 direction side of the inner peripheral surface of the second washer through hole 141 abuts against the outer peripheral surface of the shaft 110 (in the illustrated example, a part of the outer peripheral surface of the shaft 110 is bulged to the outer peripheral side at the time of pressing and abuts against the entire inner peripheral surface of the second washer through hole 141), the caulking portion 112 bites the second washer 140 so that the second washer 140 cannot be rotated entirely around the end portion 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 in the Z1 direction at the time of separating from the gear 120, the return amount R2 generated at the time of separating the second washer 140 from the gear 120 at the outer peripheral edge of the second washer 140 becomes zero, and the elastic action of the second washer 140 cannot be effectively exerted, and therefore, even if a certain friction torque is elastically formed at the beginning by the resin portion of the gear 120 abutting against the second washer 140, the friction torque is also rapidly reduced as the gear 120 is worn or plastically deformed in a state where the spring force is small, and the friction torque between the gear 120 and the second washer 140 cannot be stably secured for a long period of time.
In particular, according to the motor apparatus 1 of the present embodiment, in the friction transmission 10 including the rotation shaft 110, the gear 120, the first washer 130 and the second washer 140, a depression trace TC is formed on the outer peripheral surface of the shaft 110 at a position facing the inner peripheral surface of the second washer through-hole 141, the depression trace TC being formed by deformation of a depression formed on the outer peripheral surface of the shaft 110 before the shaft 110 is pressed to form the caulking portion 112, and more specifically, being formed by the facing side surfaces (facing in the Z direction in the illustrated example) of the depression coming into contact with each other when the shaft 110 is pressed, when the caulking portion 112 is formed by pressing the shaft 110, the entire second washer 140 can be easily rotated in the Z1 direction around the end portion 141a on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 when the second washer is separated from the gear 120.
The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.
For example, in the above-described embodiment, the friction transmission device 10 is applied to the motor device 1, but is not limited thereto, and the friction transmission device 10 may be operated alone.
In the above embodiment, the depression mark TC is formed on the outer peripheral surface of the rotation shaft 110 at a position facing the inner peripheral surface of the second washer through hole 141, but the present invention is not limited to this, and the depression mark TC or the depression may not be formed in some cases, although the depression mark TC may be formed on the outer peripheral surface of the rotation shaft 110 at a position facing the inner peripheral surface of the second washer through hole 141 after the caulking portion 112 is formed by pressing the rotation shaft 110.
In the above embodiment, only the end portion on the Z2 direction side of the inner peripheral surface of the second washer through hole 141 abuts against the outer peripheral surface of the rotating shaft 110, but the present invention is not limited to this, and the inner peripheral surface of the second washer through hole 141 may abut against the outer peripheral surface of the rotating shaft 110 within a certain length range from the end portion on the Z2 direction side thereof.
Further, in the above embodiment, the outer peripheral edge of the caulking portion 112 abuts on the second washer 140, but the invention is not limited thereto, and the outer peripheral edge of the caulking portion 112 may abut on the second washer 140 not but on the inner peripheral side of the outer peripheral edge of the caulking portion 112.
In the above embodiment, only the outer peripheral side of the first washer 130 abuts against the gear 120, and only the outer peripheral side of the second washer 140 abuts against the gear 120, but the present invention is not limited to this, and the radial center portion of the first washer 130 may abut against the gear 120, and the radial center portion of the second washer 140 may abut against the gear 120.
In the above embodiment, the shaft 110 is made of metal, the gear 120 is made of resin, the first washer 130 is made of metal, and the second washer 140 is made of metal, but the materials of the shaft 110, the gear 120, the first washer 130, and the second washer 140 may be appropriately selected as needed.
It should be understood that the present invention can freely combine the respective components in the embodiments or appropriately change or omit the respective components in the embodiments within the scope thereof.
Claims (10)
1. A friction drive device comprising:
a rotating shaft;
the gear is sleeved on the rotating shaft in a rotatable mode; and
a first washer and a second washer, wherein the first washer and the second washer are respectively sleeved on the rotating shaft in a non-rotatable manner,
the first washer abuts against the gear from a first side in the axial direction,
the second washer abuts against the gear from a second side in the axial direction,
the second gasket is provided with a second gasket through hole for the rotating shaft to penetrate through,
the rotating shaft has a caulking portion formed by pressing the rotating shaft,
the peripheral edge of the second gasket through-hole is pressed from the second side by the rivet,
it is characterized in that the preparation method is characterized in that,
the end part of the second side of the inner peripheral surface of the second gasket through hole is abutted with the outer peripheral surface of the rotating shaft,
a gap is formed between an end portion of the first side of the inner peripheral surface and the outer peripheral surface so that the second washer as a whole can rotate toward the first side about the end portion when the second washer is separated from the gear.
2. The friction drive as recited in claim 1 wherein,
a recess is formed in the outer peripheral surface at a position opposite to the inner peripheral surface,
alternatively, the first and second electrodes may be,
a depression trace is formed on the outer peripheral surface at a position facing the inner peripheral surface, the depression trace being formed by bonding facing side surfaces of depressions of the outer peripheral surface to each other.
3. The friction drive as recited in claim 1 wherein,
the gap extends from the first-side end of the inner peripheral surface toward the second side by an amount corresponding to at least half of the axial length of the inner peripheral surface.
4. The friction drive as recited in claim 1 wherein,
only the second-side end of the inner peripheral surface abuts against the outer peripheral surface.
5. The friction drive as recited in claim 1 wherein,
the outer periphery of the riveting portion is abutted to the second gasket.
6. The friction drive as recited in claim 1 wherein,
an inner peripheral side of the second gasket is closer to the first side than an outer peripheral side of the second gasket.
7. The friction drive as recited in claim 1 wherein,
the first gasket is provided with a first gasket through hole for the rotating shaft to penetrate through,
the rotating shaft has a support portion that supports a peripheral edge of the first washer through hole from the first side.
8. The friction drive as recited in claim 1 wherein,
only the outer peripheral side of the first washer abuts against the gear,
only the outer peripheral side of the second washer abuts against the gear.
9. The friction drive as recited in claim 1 wherein,
the rotating shaft is made of metal and is provided with a plurality of rotating shafts,
the gear is made of resin and is provided with a gear ring,
the first washer is made of a metal and,
the second gasket is made of metal.
10. A motor device comprises a motor part and a gear set, which is characterized in that,
comprising a friction drive according to one of claims 1 to 9,
the driving force of the motor part is transmitted to the gear of the friction transmission device via the gear set to rotate the rotation shaft of the friction transmission device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084535.3U CN214799188U (en) | 2021-05-20 | 2021-05-20 | Friction transmission device and motor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121084535.3U CN214799188U (en) | 2021-05-20 | 2021-05-20 | Friction transmission device and motor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214799188U true CN214799188U (en) | 2021-11-19 |
Family
ID=78696375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121084535.3U Expired - Fee Related CN214799188U (en) | 2021-05-20 | 2021-05-20 | Friction transmission device and motor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214799188U (en) |
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2021
- 2021-05-20 CN CN202121084535.3U patent/CN214799188U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211119 |