Shock absorption and noise reduction structure of motor

Abstract

A vibration and noise reduction structure of a motor can prevent backlash from being generated between two mutually meshed gears of each gear even if the direction of motive power applied to an output shaft from a rotor is the same as the direction of external power. Comprising a damping mechanism, and the damping mechanism comprises an output gear linkage part which is roughly cylindrical and can rotate synchronously with an output gear; a ratchet which elastically supports the last stage gear in a manner that the ratchet can rotate relative to the last stage gear with resistance; an output gear linkage protrusion protruding outward in the radial direction is formed on the outer peripheral surface of the output gear linkage member, a tooth groove is formed on the outer peripheral surface of the ratchet wheel, and when the direction of motive power transmitted from the rotor to the output gear is the same as the direction of external power applied to the output gear by external power, the output gear linkage protrusion protrudes outward in the radial direction. An output gear linkage protrusion of the output gear linkage piece is clamped with a tooth groove of the ratchet wheel so as to apply force which is opposite to the external power in direction and larger than the external power to the output gear.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction and noise reduction, and in particular to a vibration reduction and noise reduction structure for a transmission mechanism in a motor. Background Art

[0002] In the prior art, motors are often used in equipment (such as air conditioners, projectors, printers, etc.) in conference rooms, living rooms, offices, hospitals, etc. that require a quiet environment. In order to keep the environment quiet, the noise and vibration of the motors in the various equipment in the above environment are required to be as small as possible. As shown in FIG1 , the motor 1A includes: a rotor shaft (111A) fixed to the motor housing; a rotor (not shown), the outer peripheral surface of the upper portion of which is provided with a rotor gear 112A, and the rotor can rotate around the rotor shaft 111A; a transmission mechanism, the transmission mechanism includes a first gear 121A (i.e., a primary gear) meshed with the rotor gear 112A, a second gear 123A meshed with the first gear, a third gear 125A (i.e., an intermediate gear) meshed with the second gear, and an output gear 127A (i.e., a final gear) meshed with the third gear, and the output gear 127A is provided with an output shaft 128A through it; and a base 13A, which is used to install the transmission mechanism.

[0003] In the motor 1A constructed as described above, the output shaft 128A rotates under the action of the following two driving forces: first, external power generated by the gravity of the weight and / or the spring pulling force is applied to the output shaft 128A to rotate the output shaft 128A; second, the rotor transmits the original power to the final gear 127A via the rotor gear 112A to rotate the output shaft 128A.

[0004] When the output shaft 128A is driven and rotated in the first case and the output shaft 128A is driven and rotated in the second case, the two driving forces exert the same force on each gear, and the rotation torque of each gear increases instantly, and a backlash is generated between the gear and the gear meshing with it, such as between the output gear and the gear meshing with it. In this way, the meshing between the two meshing gears will be interrupted, and the teeth will collide with each other to generate noise. Summary of the invention

[0005] The present invention is completed in view of the above-mentioned technical problems, and its purpose is to provide a shock-absorbing and noise-reducing structure of a motor, which can prevent the generation of tooth gap between two mutually meshing gears of each gear even when the direction of the original force applied from the rotor to the output shaft is the same as the direction of the external power applied from the outside to the output shaft, thereby preventing vibration and noise caused by the tooth gap.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a vibration reduction and noise reduction structure of a motor, comprising: a rotor shaft fixed on a housing; a rotor, a rotor gear being provided on the upper outer peripheral surface of the rotor; a transmission mechanism, the transmission mechanism transmitting the torque from the rotor to an external device; and a base, the base being provided for the installation of the transmission mechanism, characterized in that the transmission mechanism comprises: a primary gear meshing with the rotor gear; an intermediate gear meshing with the primary gear; an output gear meshing with the intermediate gear and connected to an external device via an output shaft at a central portion; and a final gear meshing with the output gear, a damping mechanism being further provided between the output gear and the base and between the final gear and the base, the damping mechanism comprising: an output gear linkage, the output gear linkage The movable member is roughly cylindrical, located between the output gear and the base, and can rotate synchronously with the output gear; the ratchet, the ratchet is located between the final gear and the base, and elastically supports the final gear in a manner that it can rotate relative to the final gear with resistance; an output gear linkage protrusion protruding radially outward is formed on the outer peripheral surface of the output gear linkage member in a portion directly opposite to the ratchet, and gear teeth arranged along the circumferential direction are formed on the outer peripheral surface of the ratchet, and a tooth groove is formed between two adjacent gear teeth. When the direction of the original power transmitted from the rotor to the output gear is the same as the direction of the external power applied to the output gear by the external power, the output gear linkage protrusion of the output gear linkage member engages with the tooth groove of the ratchet to apply a force to the output gear that is opposite to the direction of the external power and is greater.

[0007] According to the above structure, the damping mechanism is constituted to include an output gear linkage and a ratchet, an output gear linkage protrusion protruding radially outward is formed on the outer peripheral surface of the output gear linkage and the part directly opposite to the ratchet, and gear teeth arranged along the circumferential direction are formed on the outer peripheral surface of the ratchet, and a tooth groove is formed between two adjacent gear teeth, and when the original power on the output gear is in the same direction as the external power, the output gear linkage protrusion in the damping mechanism is engaged with the tooth groove of the ratchet to generate a force that is opposite to the original power and the external power and greater than the original power and the external power to overcome the external power. In this way, it is possible to prevent the torque acting on the output gear from increasing instantly, resulting in a backlash between the output gear and the gear meshing with it, and the backlash causes the teeth of the output gear to collide with the teeth of the meshing gear to generate vibration and noise.

[0008] The shock-absorbing and noise-reducing structure of the motor of the second aspect of the present invention is based on the shock-absorbing and noise-reducing structure of the motor of the first aspect of the present invention, and is characterized in that a limiting groove opening toward one side of the base is formed on the output gear linkage, and a stopper protruding toward one side of the output gear linkage is formed at a position corresponding to the limiting groove on the base, and the stopper is inserted into the limiting groove to limit it to reciprocating motion within a certain range.

[0009] According to the above structure, the stopper formed on the base is inserted into the limiting groove formed on the output gear linkage member to limit it to reciprocating within a certain range, so as to allow the output gear linkage protrusion of the output gear linkage member to slowly insert into the tooth groove within a certain rotation range. In this way, it can be reliably ensured that the output gear linkage protrusion is engaged with the tooth groove.

[0010] The shock-absorbing and noise-reducing structure of the motor of the third aspect of the present invention is based on the shock-absorbing and noise-reducing structure of the motor of the first aspect or the second aspect of the present invention, and is characterized in that the ratchet includes a cylindrical ratchet main body and a first branch portion, a second branch portion, a third branch portion and a fourth branch portion arranged in the circumferential direction of the ratchet main body and converging toward the center toward the final gear side, and the first branch portion to the fourth branch portion elastically support the final gear in a manner that can be opened or gathered.

[0011] According to the above structure, by setting the ratchet to include a first branch portion, a second branch portion, a third branch portion and a fourth branch portion which are arranged in the circumferential direction of the ratchet main body and converge toward the center toward the final gear side, the first branch portion to the fourth branch portion elastically support the final gear in a manner that can be opened or gathered, and the elastic supporting force on the final gear can be adjusted by changing the pressing force of the first branch portion to the fourth branch portion on the final gear.

[0012] The vibration reduction and noise reduction structure of the motor of the fourth aspect of the present invention is based on the vibration reduction and noise reduction structure of the motor of the third aspect of the present invention, and is characterized in that a plurality of gear teeth are arranged on the outer peripheral surface of the ratchet main body, and the plurality of gear teeth are respectively formed to include an arc-shaped surface extending toward one side of the circumference in a circular arc shape as it extends from the radial inside to the radial outside, and a straight surface extending straightly toward the radial inside from the radial outermost point of the arc-shaped surface, and tooth grooves are formed between adjacent gear teeth.

[0013] According to the above structure, by forming the multiple gear teeth on the outer peripheral surface of the ratchet main body into, respectively, an arcuate surface extending in a circular arc shape toward one circumferential side as it goes from the radial inside to the radial outside and a straight surface extending in a straight line toward the radial inside from the radial outermost point of the arcuate surface, a tooth groove is formed between adjacent gear teeth, and the output gear linkage protrusion can be guided to fall into the tooth groove through the straight surface, and the output gear linkage protrusion can be guided to escape from the tooth gap through the arcuate surface.

[0014] The shock-absorbing and noise-reducing structure of the motor of the fifth aspect of the present invention is based on the shock-absorbing and noise-reducing structure of the motor of the third aspect of the present invention, and is characterized in that a first contact portion having a greater friction coefficient than that of other portions is formed on the outer peripheral surface of the final gear, and a second contact portion having a greater friction coefficient than that of other portions is formed on the portion of the inner peripheral surface of the first branch portion to the fourth branch portion of the ratchet corresponding to the first contact portion, and the first contact portion contacts the second contact portion to elastically support the final gear on the first branch portion to the fourth branch portion of the ratchet.

[0015] According to the above structure, a first contact portion having a larger friction coefficient than other portions is formed on the outer peripheral surface of the final gear, and a second contact portion having a larger friction coefficient than other portions is formed at a portion of the inner peripheral surface of the first branch portion to the fourth branch portion of the ratchet corresponding to the first contact portion, and the first contact portion contacts the second contact portion to elastically support the final gear on the first branch portion to the fourth branch portion of the ratchet, so that the support force for elastically supporting the final gear on the ratchet can be increased by the friction force between the first contact portion and the second contact portion. Therefore, the final gear can be supported more reliably.

[0016] The shock-absorbing and noise-reducing structure of the motor according to the sixth aspect of the present invention is based on the shock-absorbing and noise-reducing structure of the motor according to the fifth aspect of the present invention, and is characterized in that the inner circumferential surface of the first branch portion to the fourth branch portion is sequentially formed with a second contact portion, a gap portion separated from the final stage gear by a gap, and a sliding portion allowing the final stage gear to slide along the insertion direction of the final stage gear.

[0017] According to the above structure, when the final gear is inserted into the first branch part to the fourth branch part, the front part of the final gear in the insertion direction (i.e., the deepest inserted part) can slide relative to the first branch part to the fourth branch part, and the rearmost part of the final gear in the insertion direction (i.e., the shallowest inserted first contact part) will be pressed by the first branch part to the fourth branch part and contact with the second contact part, and the middle part of the final gear in the insertion direction will be separated from the first branch part to the fourth branch part to reduce the axial contact area between the final gear and the first branch part to the fourth branch part.

[0018] In this way, on the basis of supporting the final gear by the pressing force generated by the friction force between the first contact part and the second contact part, other parts in the insertion direction of the final gear are released by the gap part and the sliding part so that other parts allow the final gear to move slightly. Therefore, it helps to ensure that the final gear is further rotated relative to the first branch part to the fourth branch part on the basis of elastic support, thereby reducing the degree of restriction on the rotation of the final gear by the first branch part to the fourth branch part.

[0019] The vibration reduction and noise reduction structure of the motor of the seventh aspect of the present invention is based on the vibration reduction and noise reduction structure of the motor of the first aspect, the second aspect, the fourth aspect to the sixth aspect of the present invention, and is characterized in that the output gear linkage is formed with a notch portion for avoiding surrounding gears, and the notch portion is composed of a first notch surface cut from the radial outside to the radial inside and a second notch surface cut along the axial direction at the radial inside.

[0020] According to the above structure, by forming a notch portion in the output gear linkage to avoid the surrounding gears, the space for the output gear linkage to cooperate with other gears can be reduced, thereby making the entire device miniaturized.

[0021] The vibration-damping and noise-reducing structure of the motor of the eighth aspect of the present invention is based on the vibration-damping and noise-reducing structure of the motor of the first aspect, the second aspect, and the fourth aspect to the sixth aspect of the present invention, and is characterized in that arc-shaped flanges are respectively formed on the surface of the output gear linkage that contacts the output gear and the surface that contacts the base.

[0022] According to the above structure, arc-shaped flanges are formed on the surface of the output gear linkage member that contacts the output gear and the surface that contacts the base, respectively, so that the area where friction is generated can be reduced compared to the case of surface contact. In this way, the output gear can be more easily rotated relative to the output gear linkage member, thereby reducing the degree of restriction on the rotation of the final gear by the first branch part to the fourth branch part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1A Schematic diagram showing the overall structure of a conventional motor vibration reduction and noise reduction structure.

[0025] Figure 1B Yes means Figure 1ASchematic diagram of the meshing state of multiple gears in the transmission mechanism.

[0026] Figure 2A 1 is a schematic diagram showing the overall structure of the vibration and noise reduction structure of the motor according to the first embodiment of the present invention.

[0027] Figure 2B It is an exploded perspective view showing the components of the vibration and noise reduction structure of the motor according to the first embodiment of the present invention.

[0028] Figure 2C Yes means Figure 2B Schematic diagram of the structure of the ratchet and the fourth gear.

[0029] Figure 3 Schematic diagram showing flanges between the output gear linkage and the output gear and between the output gear linkage and the base of the vibration reduction and noise reduction structure of the motor according to the first embodiment of the present invention.

[0030] Figure 4 The diagram is a schematic diagram showing the meshing state and the disengagement state between the output gear and the fourth gear when the output gear of the vibration reduction and noise reduction structure of the motor according to the first embodiment of the present invention rotates counterclockwise and clockwise.

[0031] Figure 5A It is a diagram showing the state of force acting on the output gear in the non-excitation state of the transmission mechanism of the vibration and noise reduction structure of the motor according to the first embodiment of the present invention. Figure 5B It is a diagram showing the state of force acting on the output gear in the excited state of the transmission mechanism of the vibration and noise reduction structure of the motor according to the first embodiment of the present invention.

[0032] Fig. 6A It is a perspective view showing a state in which the output gear linkage element of the vibration and noise reduction structure of the motor according to the first embodiment of the present invention avoids the third gear. Figure 6B It means from Fig. 6A A cross-sectional view obtained by cutting the output gear linkage and the avoidance portion of the third gear along the XZ plane. Figure 6C It means from Fig. 6A Schematic diagram of the angular range in which the output gear linkage 129 can rotate relative to the ratchet 12H when viewed from the Z1 side toward the Z2 side.

[0033] Figure 7 It is a schematic diagram showing the state where the output gear linkage protrusion of the output gear linkage member of the vibration reduction and noise reduction structure of the motor according to the first embodiment of the present invention falls into and escapes from the tooth groove of the ratchet wheel.

[0034] Fig. 8A Schematic diagram showing the overall structure of a vibration reduction and noise reduction structure of a motor according to a second embodiment of the present invention

[0035] Figure 8B It is an exploded perspective view showing the components of the vibration and noise reduction structure of a motor according to the second embodiment of the present invention.

[0036] Fig. 9 1 is a cross-sectional view showing the relative positional relationship among the output gear linkage, the output shaft, and the ratchet in the vibration and noise reduction structure of the motor according to the second embodiment of the present invention.

[0037] (Explanation of symbols)

[0038] 1 motor;

[0039] 112 rotor gear;

[0040] 111 rotor shaft;

[0041] 12 transmission mechanism;

[0042] 120 first gear shaft;

[0043] 121 first gear;

[0044] 122 second gear;

[0045] 123 third gear;

[0046] 124 third gear shaft;

[0047] 125 output gear;

[0048] 126 output shaft;

[0049] 127 fourth gear;

[0050] 1271 fourth gear main body;

[0051] 1272 fourth gear extension;

[0052] 128 fourth gear shaft;

[0053] 129 output gear linkage;

[0054] 129A output gear side flange;

[0055] 129B base side flange;

[0056] 1291 limiting slot;

[0057] 1292 output gear linkage protrusion;

[0058] 1293 first incision surface;

[0059] 1294 second incision surface;

[0060] 12H ratchet;

[0061] 12H1 ratchet body;

[0062] 12H2 ratchet branch;

[0063] 12H21 First Branch;

[0064] 12H22 Second Branch;

[0065] 12H23 Third Branch;

[0066] 12H24 Fourth Branch;

[0067] S1 first contact portion;

[0068] S2 second contact portion;

[0069] S3 gap;

[0070] S4 sliding part;

[0071] 13 base;

[0072] 131 stopper;

[0073] 132 Mounting Seat. DETAILED DESCRIPTION

[0074] Below, refer to Figures 2A to 9 Embodiments and modifications of the vibration and noise reduction structure for a motor according to the present invention will be described.

[0075] In order to facilitate the description of the above structure, Figures 2A to 7 A unified coordinate system is used in all detailed descriptions. Figure 2A The overall structure diagram of the vibration reduction and noise reduction structure in the reference standard is used as the reference standard, among which Figure 2A The extension direction of each gear shaft in the embodiment is set to the Z direction, one side of the Z direction is set to the Z1 side, and the other side of the Z direction is set to the Z2 side. The long side direction of the base 13 is set to the X direction, one side of the X direction is set to the X1 side, and the other side of the X direction is set to the X2 side. The short side direction of the base 13 is set to the Y direction, one side of the Y direction is set to the Y1 side, and the other side of the Y direction is set to the Y2 side.

[0076] Below, refer to Figures 2A to 7 The vibration and noise reduction structure of the motor 1 according to the first embodiment of the present invention will be described in detail.

[0077] (First Embodiment)

[0078] (Overall Structure of the Vibration and Noise Reduction Structure of Motor 1)

[0079] like Figure 2AAs shown, the vibration reduction and noise reduction structure of the motor 1 of this embodiment includes: a rotor shaft 111, which is fixed to the motor housing; a rotor 111, which is sleeved on the outer circumference of the rotor shaft 111 and can rotate around the rotor shaft 111, and a rotor gear 112 is provided on the outer circumference of the upper portion thereof; a transmission mechanism 12, the transmission mechanism including a first gear 121, a second gear 122, a third gear 123, an output gear 125 and a fourth gear 127, the first gear 121 is meshed with the rotor gear 112, and is driven by the first gear shaft 12 0 penetrates and rotates synchronously therewith, the second gear 122 is meshed with the first gear 121, the third gear 123 is meshed with the second gear 122, and is penetrated by the third gear shaft 124 and rotates synchronously therewith, the output gear 125 is meshed with the third gear 123, and is penetrated by the output shaft 126 and rotates synchronously therewith, the fourth gear 127 is meshed with the output gear 125, and is penetrated by the fourth gear shaft 128 and rotates synchronously therewith; and a base 13, the base is used for mounting the transmission mechanism 12.

[0080] According to the vibration reduction and noise reduction structure of the motor 1 constructed as described above, the torque is transmitted from the rotor gear 112 to the first gear 121 by rotating from the rotor shaft 111, and is transmitted to the second gear 122, the third gear 123, the output gear 125 and the fourth gear 127 in sequence, and is transmitted to the external device via the output shaft 126.

[0081] In the vibration reduction and noise reduction structure of the motor 1 constructed in the above manner, the lower end portion 1261 of the output shaft 126 passes through the output gear linkage 129 and is inserted into the cylindrical mounting seat 132 , and is mounted on the base 13 in a manner that allows rotation relative to the mounting seat 132 .

[0082] (Damping mechanism)

[0083] like Figure 2B As shown, the vibration reduction and noise reduction structure of the motor 1 of the present invention also includes a damping mechanism, which includes an output gear 125, an output shaft 126, an output gear linkage 129, a fourth gear 127, a fourth gear shaft 128 and a ratchet 12H.

[0084] Specifically, an output gear 125 is sleeved on the Z1 side end of the output shaft 126, and the output gear 125 can rotate synchronously with the output shaft 126. An output gear linkage 129 is sleeved on the Z2 side end of the output shaft 126, and the Z2 side end of the output shaft 126 is bonded to the output gear linkage 129 by an adhesive.

[0085] Moreover, if Figure 3As shown, an output gear side flange 129A is formed on the Z1 side surface of the output gear linkage 129 and is in the shape of an arc when viewed from the Z1 side to the Z2 side, and a base side flange 129B is formed on the Z2 side surface of the output gear linkage 129 and is in the shape of an arc when viewed from the Z2 side to the Z1 side.

[0086] When the output gear linkage 129 is installed between the output gear 125 and the base 13, the output gear side flange 129A of the output gear linkage 129 contacts the Z2 side surface of the output gear 125, and the output gear side flange 129B of the output gear linkage 129 contacts the Z1 side surface of the base 13. In this way, by replacing the surface contact with the line contact realized by the output gear side flange 129A and the base side flange 129B, the friction between the output gear linkage 129 and the output gear 125 and between the output gear linkage 129 and the base 13 can be reduced, thereby facilitating the rotation of the output gear 125 and the output shaft 126.

[0087] Output gear linkage 129 as Figure 2A The structure shown is that the whole is roughly cylindrical, with a hollow portion for the output shaft 126 to pass through formed in the center, which can rotate synchronously with the output shaft 126 and the output gear 125, and a roughly rectangular limiting groove 1291 is formed on the Z2 edge of its outer peripheral surface, which opens toward the Z2 side and extends from the Z2 side to the Z1 side. Correspondingly, a roughly rectangular stopper 131 extending upward is formed at a portion of the base 13 corresponding to the limiting groove 1291. As shown in FIG. 6, the limiting groove 1291 is formed to allow the stopper 131 to rotate at an angle of 7 degrees therein.

[0088] In addition, if Figure 5A As shown, an output gear linkage protrusion 1292 which protrudes radially outward and has a triangular shape when viewed from the Z1 side to the Z2 side is formed at a portion of the outer peripheral surface of the output gear linkage member 129 corresponding to the ratchet 12H.

[0089] Moreover, if Figure 3 As shown, the outer peripheral surface of the output gear linkage 129 is formed with a notch portion for avoiding the third gear 123, and the notch portion is formed by Figure 3 A first notch surface 1293 is formed by cutting the radial outer side of the outer peripheral surface of the output gear linkage 129 toward the radial inner side, and a second notch surface 1294 is formed by cutting the radial inner side of the first notch surface 1293 along the axial direction (i.e., Z direction) of the output shaft 126 toward the Z2 side.

[0090] The avoidance portion formed by the first notch surface 1293 and the second notch surface 1294 forms a space for accommodating the X1 side portion of the third gear 123. In this way, the spatial dimensions of the third gear 123 and the output gear linkage 129 in the X direction and the Z direction can be reduced, thereby reducing the overall size of the device.

[0091] In addition, if Figure 2C As shown, the fourth gear 127 meshing with the output gear 125 includes: a fourth gear main body 1271, which has a plurality of gear teeth formed on the outer peripheral surface; and a fourth gear extension portion 1272, which is roughly cylindrical and has a second contact portion S2 (shown as the shaded portion in the figure) with a large friction coefficient formed on the outer peripheral surface of the fourth gear extension portion 1272.

[0092] like Figure 2B As shown, the fourth gear shaft 128 is inserted into the fourth gear 127 and can rotate synchronously with the fourth gear shaft 128 .

[0093] A ratchet 12H is also sleeved on the outer circumferential surface of the fourth gear shaft 128 on the Z2 side, and the ratchet 12H includes a ratchet main body 12H1 located on the Z2 side and a ratchet branch portion 12H2 extending from the Z1 side surface of the ratchet main body 12H1 to the Z1 side, and the ratchet branch portion 12H2 includes a first branch portion 12H21, a second branch portion 12H22, a third branch portion 12H23 and a fourth branch portion 12H24 which are arranged side by side along the circumferential direction of the ratchet main body 12H1 and gradually approach the center as they move from the Z2 side toward the Z1 side.

[0094] The first branch portion 12H21 , the second branch portion 12H22 , the third branch portion 12H23 and the fourth branch portion 12H24 elastically support the fourth gear extension portion 1272 of the fourth gear 127 in a manner that they can move closer to the inside in the radial direction or expand outward in the radial direction.

[0095] Specifically, Figure 2C As shown, the inner surface of each of the first branch portion 12H21 to the fourth branch portion 12H24 is formed from the Z1 side to the Z2 side with a first contact portion S1 with a large friction coefficient, a gap portion S3 separated from the fourth gear extension portion 1272 by a gap, and a sliding portion S4 that can slide relative to the fourth gear extension portion 1272.

[0096] In this way, by arranging the fourth gear 127, the fourth gear shaft 128 and the first branch portion 12H21 to the fourth branch portion 12H24 in the above-mentioned manner, when the fourth gear shaft 128 is inserted into the fourth gear extension portion 1272 of the fourth gear 127 and installed into the first branch portion 12H21 to the fourth branch portion 12H24, the fourth gear extension portion 1272 can slide relative to the sliding portion S4 in the sliding portion S4, and a slight looseness is allowed in the gap portion S3. In the first contact portion S1, the second contact portion S2 formed in the fourth gear extension portion 1272 contacts the first contact portion S1 and is elastically supported, and the first branch portion 12H21 to the fourth branch portion 12H24 will gather radially inward to grasp the fourth gear extension portion 1272 of the fourth gear 127. In this way, the fourth gear extension portion 1272 rotates relative to the first branch portion 12H21 to the fourth branch portion 12H24 of the ratchet branch portion 12H2 of the ratchet 12H with resistance (friction force between the first contact portion S1 and the second contact portion S2).

[0097] In addition, if Figure 7 As shown, the outer peripheral surface of the ratchet main body 12H1 of the ratchet 12H is formed with a plurality of gear teeth 12H11, and the gear teeth 12H11 are composed of an arcuate surface 12H11A that rotates clockwise (CW direction) from the radial inner side to the radial outer side, and a straight line surface 12H11B that extends straightly from the radial outermost point of the arcuate surface 12H11A toward the radial inner side. A tooth groove 12H12 is formed between two gear teeth 12H11. The maximum width D1 of the portion of the tooth groove 12H12 for accommodating the front end of the output gear linkage protrusion 1292 in the circumferential direction is greater than the maximum width D2 of the portion of the front end of the accommodated gear linkage protrusion 1292 in the circumferential direction, and D1 is larger than D2 by an amount equivalent to the amount when the output gear linkage member 1292 is allowed to rotate 7 degrees in the circumferential direction (refer to FIG. 6). In this way, the output gear linkage protrusion 1292 can be made to function in the shortest possible time.

[0098] (Function of the vibration reduction and noise reduction structure of motor 1)

[0099] According to the vibration reduction and noise reduction structure of the motor 1 constructed as described above, Figure 4 As shown in the upper left figure, when the damping mechanism in the shock-absorbing and noise-reducing structure of the motor 1 takes effect, driven by the rotor, the output gear 125 rotates counterclockwise when viewed from the Z1 side to the Z2 side, and at the same time, the fourth gear 127 meshing therewith rotates clockwise when viewed from the Z1 side to the Z2 side.

[0100] At the same time, Figure 4As shown in the lower left figure, the output gear 125 drives the output gear linkage 129 to rotate counterclockwise when viewed from the Z1 side to the Z2 side, and the ratchet 12H meshing therewith rotates clockwise when viewed from the Z1 side to the Z2 side.

[0101] Moreover, the stopper 131 on the base 13 is received in the limiting groove 1291 of the output gear linkage member 129 .

[0102] At this time, the output gear linkage protrusion 1292 of the output gear linkage member 129 engages in the tooth groove 12H12 between the gear teeth 12H11 of the ratchet body 12H1 of the ratchet 12H, and continues to rotate counterclockwise 7 degrees until the stop member 131 abuts against the left edge of the limiting groove 1291 in the figure, and the output gear linkage protrusion 1292 is completely engaged in the tooth groove 12H12.

[0103] In this case, if Figure 5B As shown in FIG. 1 , the output gear 125 is acted upon by the following three forces: first, an external force F1 applied by a weight to the output gear 125 in a counterclockwise direction when viewed from the Z1 side to the Z2 side; second, a motive force F3 transmitted from the rotor; third, a friction force f4 (the direction of the friction force f4 is referenced to FIG. 1 ) between the output gear 125 and the fourth gear 127 by engaging the output gear linkage protrusion 1292 with the tooth groove 12H12 of the ratchet 12H. Figure 5A ).

[0104] Among them, the friction force f4 is greater than the external force F1, so F2=f4-F1, so the motive force F3 transmitted from the rotor is opposite to F2. Therefore, even if the external force F1 acting on the output gear 125 is in the same direction as the motive force F3, since the friction force f4 between the output gear 125 and the fourth gear 127 overcomes the external force F1, the torque acting on the output gear 125 will not suddenly increase, causing the torque on the output gear 125 in the counterclockwise direction when viewed from the Z1 side to the Z2 side to increase instantly, thereby preventing the generation of backlash between the output gear 125 and the fourth gear 127, and preventing the collision between the gear teeth of the output gear 125 and the gear teeth of the fourth gear 127 to generate vibration and noise.

[0105] On the other hand, if Figure 4 As shown in the upper right figure, driven by the rotor, the output gear 125 rotates in the clockwise direction when viewed from the Z1 side to the Z2 side, and the fourth gear 127 meshing therewith rotates in the counterclockwise direction when viewed from the Z1 side to the Z2 side.

[0106] At this time, the limiting groove 1291 of the output gear linkage member 129 rotates relative to the stopper 131 in the clockwise direction when viewed from the Z1 side to the Z2 side.

[0107] At the same time, Figure 4 As shown in the lower right figure in FIG. 1 , the output gear 125 drives the output gear linkage member 129 to rotate in the clockwise direction when viewed from the Z1 side to the Z2 side. During the rotation, the output gear linkage protrusion 1292 engaged in the tooth groove 12H12 between the gear teeth 12H11 of the ratchet body 12H1 of the ratchet 12H is as shown in FIG. Figure 7 As shown, the output gear linkage protrusion 1292 is disengaged from the tooth groove 12H12, that is, the engagement between the output gear linkage protrusion 1292 and the tooth groove 12H12 of the ratchet 12H is released, and the ratchet 12H idles in the counterclockwise direction when viewed from the Z1 side to the Z2 side. Until the output gear linkage protrusion 1292 rotates clockwise until the limit groove 1291 abuts against the right edge of the stopper 131 in the figure (that is, as shown in the figure Figure 6B The output gear linkage member 129 rotates 7 degrees in the clockwise direction when viewed from the Z1 side to the Z2 side, and the rotation of the output gear linkage member 129 stops. In this state, the output gear 125 continues to rotate.

[0108] When the power is cut off to motor 1, Figure 5A In the non-excitation state shown, there are two forces acting on the output gear 125: first, the friction force f4 between the output gear 125 and the fourth gear 127; second, the external force F1 applied to the output gear 125 by a weight.

[0109] At this time, since the friction force f4 is greater than the external force F1 , even if the external force F1 is applied to the output gear 125 , the external force F1 will not drive the output gear 125 to rotate.

[0110] Therefore, in the non-excitation state, the output gear 125 maintains a stopped state.

[0111] Thus, according to the vibration reduction and noise reduction structure of the motor 1 of this embodiment, in the non-excitation state, even if the output gear 125 attempts to rotate in the counterclockwise direction when viewed from the Z1 side to the Z2 side under the action of the external power F1 from the outside, it can be stopped by the friction force f4 generated by the damping mechanism. As a result, the braking torque on the output gear 125 can be increased. Therefore, another method that is different from the method of increasing the braking torque by increasing the magnetic properties of the rotor or by energizing in the prior art (output gear self-locking function) can be provided.

[0112] In this embodiment, the output shaft 126 is bonded to the hollow part of the output gear linkage 129 by an adhesive, so that when the output gear 125 rotates and drives the output gear linkage 129 to rotate synchronously, the output gear 125 drives the output gear linkage 129 to rotate with a small force due to the small adhesive force of the adhesive. When the output gear linkage protrusion 1292 of the output gear linkage 129 is engaged with the tooth groove 12H12 of the ratchet 12H as described above, the output gear linkage 129 stops rotating, and the output shaft 126 rotating synchronously therewith overcomes the adhesive force of the adhesive and drives the output gear 125 to continue rotating, and the speed of the output gear 125 is hardly reduced. Moreover, when the output gear linkage protrusion 1292 of the output gear linkage 129 disengages from the tooth groove 12H12 of the ratchet 12H as described above, and when the output gear linkage linkage 129 is restricted by the stopper 131 and stops rotating, the output shaft 126 rotating synchronously therewith will overcome the adhesive force of the adhesive and drive the output gear 125 to continue rotating, and the rotation speed of the output gear 125 will hardly decrease.

[0113] (Modification of the first embodiment)

[0114] In the above embodiment, the case in which the output gear 125 rotates in the counterclockwise direction (CCW direction) when viewed from the Z1 side to the Z2 side, the fourth gear 127 rotates in the clockwise direction (CW direction) when viewed from the Z1 side to the Z2 side, and the output gear linkage 129 engages in the tooth groove 12H12 of the ratchet 12H in the counterclockwise direction when viewed from the Z1 side to the Z2 side is described as an example, but the present invention is not limited to this, and can also be set to the following structure: the output gear 125 rotates in the clockwise direction (CW direction) when viewed from the Z1 side to the Z2 side, the fourth gear 127 rotates in the counterclockwise direction (CCW direction) when viewed from the Z1 side to the Z2 side, and the output gear linkage 129 engages in the tooth groove 12H12 of the ratchet 12H in the clockwise direction when viewed from the Z1 side to the Z2 side.

[0115] In this way, when the direction of the original force applied from the rotor to the output gear is the same as the direction of the external force applied from the outside to the output gear and both are in the clockwise direction when viewed from the Z1 side to the Z2 side, the damping mechanism composed of the output gear 125, the output gear linkage 129, the fourth gear 127, the fourth gear shaft 128 and the ratchet 12H can also prevent the torque of the output gear 125 in the clockwise direction from increasing instantaneously, so as to prevent the generation of a tooth gap between the output gear 125 and the fourth gear 127, thereby preventing the vibration and noise caused by the tooth gap.

[0116] (Second Embodiment)

[0117] Above, refer to Figures 2A to 7The vibration and noise reduction structure of the motor 1 according to the first embodiment of the present invention has been described. FIG. 8A to FIG. 9 The vibration reduction and noise reduction structure of the motor 1 according to the second embodiment of the present invention has been described. The vibration reduction and noise reduction structure of the motor 1 according to the present embodiment is different from that of the first embodiment described above in that:

[0118] (1) A fifth gear 12I and a fifth gear shaft 12J that rotates synchronously and coaxially therewith are added between the third gear 123 and the output gear 125.

[0119] (2) The notch portion on the output gear linkage member 129 is provided at a different location.

[0120] (3) The mounting seat 132 on which the output shaft 126 is mounted on the base 13 has a conical shape.

[0121] Regarding (1) above, if Fig. 8A As shown, the vibration reduction and noise reduction structure of the motor 1 of this embodiment includes: a rotor (omitted from the figure), the rotor includes a rotor gear (not shown); a transmission mechanism 12, the transmission mechanism 12 includes a first gear 121 (i.e., a primary gear), a second gear 122, a third gear 123, a fifth gear 12I, an output gear 125, and a fourth gear 127, the first gear 121 is meshed with the rotor gear 112, which is penetrated by the first gear shaft 120 and rotates synchronously therewith, the second gear 122 is meshed with the first gear 121, and the third gear 123 is meshed with the fifth gear 12I, and the output gear 125 and the fourth gear 127 are meshed with each other. The third gear 123 is meshed with the second gear 122, which is penetrated by the third gear shaft 124 and rotates synchronously therewith, the fifth gear 12I is meshed with the third gear 123, which is penetrated by the fifth gear shaft 12J and rotates synchronously therewith, the output gear 125 is meshed with the fifth gear 12I, which is penetrated by the output shaft 126 and rotates synchronously therewith, the fourth gear 127 is meshed with the output gear 125, which is penetrated by the fourth gear shaft 128 and rotates synchronously therewith; and a base 13, the base 13 is used for mounting the transmission mechanism 12.

[0122] An output gear 125 is sleeved on the Z2 side end of the output shaft 126, and the output gear 125 can rotate synchronously with the output shaft 126. An output gear linkage 129 is sleeved on the Z2 side end of the output shaft 126, and the Z2 side end of the output shaft 126 is bonded to the output gear linkage 129 by an adhesive.

[0123] Regarding (2) above, if Fig. 8A , Figure 8B As shown, a notch portion is formed on the output gear linkage 129, which is composed of a first notch surface 1292 cut radially inward from the outer circumferential surface of the output gear linkage 129 and a second notch surface 1294 cut radially inward from the first notch surface 1292 along the Z direction toward the Z1 side.

[0124] So, like Fig. 8A As shown, the portion of the fifth gear 12I located on the X1 side and the Z1 side is accommodated by the space formed by the first notch surface 1292 and the second notch surface 1294. In this way, the spatial dimensions of the fifth gear 12I and the output gear 125 in the X direction and the Z direction can be reduced, thereby reducing the size of the entire device.

[0125] Regarding (3) above, if Fig. 8A As shown, the output gear linkage 129 is constructed to be generally cylindrical in shape, with a hollow portion in the center for the output shaft 126 to pass through, and can rotate synchronously with the output shaft 126 and the output gear 125. A limiting groove 1291 is formed on the Z2 side edge of its outer circumferential surface, which is open to the Z2 side and extends from the Z2 side to the Z1 side and is roughly rectangular when viewed from the Y2 side to the Y1 side. Correspondingly, a stopper 131 in the shape of a roughly rectangular parallelepiped extending to the Z1 side is formed at a portion of the base 13 corresponding to the limiting groove 1291.

[0126] In addition, similar to the first embodiment, the output shaft 126 is bonded to the hollow portion (not shown) of the output gear linkage 129 by an adhesive, and is installed in a cylindrical mounting seat 132 formed integrally with the base 13 through the output gear linkage 129. In this way, the contact surface between the output gear linkage 129 and the mounting seat 132 can be increased, so that the output gear linkage 129 can be supported more stably.

[0127] In this embodiment, similar to the first embodiment, the damping mechanism is composed of the output gear 125, the output shaft 126, the output gear linkage 129, the fourth gear 127, the fourth gear shaft 128, and the ratchet 12H.

[0128] In the damping mechanism, the output shaft 126 penetrates the output gear 125 and rotates synchronously around the axis thereof, and the Z2 side portion of the output shaft 126 is bonded to the hollow portion of the output gear 125 by an adhesive.

[0129] An output gear linkage protrusion 1292 protruding radially outward is formed on the outer peripheral surface of the output gear linkage member 129, which is roughly triangular when viewed from the Z1 side to the Z2 side. Correspondingly, the outer peripheral surface of the ratchet 12H includes a circular ratchet main body 12H1 and a ratchet branch part 12H2 having a plurality of gear teeth arranged on the outer peripheral surface. Among them, a plurality of gear teeth 12H11 are arranged on the outer peripheral surface of the ratchet main body 12H1, and a tooth groove 12H12 is formed between two gear teeth 12H11 of the plurality of gear teeth 12H11. The ratchet branch part 12H2 includes a first branch part 12H21 to a fourth branch part 12H24 arranged along the circumferential direction of the ratchet main body 12H1 and approaching the center as it moves from the Z2 side toward the Z1 side. The first branch portion 12H21 to the fourth branch portion 12H24 are gathered toward the center so that the first friction portion S1 of the first branch portion 12H21 to the fourth branch portion 12H24 is pressed against the second friction portion S2 of the fourth gear extension portion 1272, thereby generating a friction force between the first friction portion S1 and the second friction portion S2, and the fourth gear extension portion 1272 of the fourth gear 127 is supported by the friction force.

[0130] In addition, if Fig. 9 As shown, an arc-shaped output gear side flange 129A protruding toward the Z1 side is formed on the Z1 side surface of the output gear linkage 129, and an arc-shaped base side flange 129B protruding toward the Z2 side is formed on the Z2 side surface of the output gear linkage 129. The output gear linkage 129 is in line contact with the Z2 side surface of the output gear 125 and the Z1 side surface of the base 13 via the output gear side flange 129A and the base side flange 129B, respectively. In this way, compared with the case of surface contact, the contact area between the output gear 125 and the output gear linkage 129 and between the output gear linkage 129 and the base 13 can be reduced, thereby reducing friction.

[0131] According to the damping mechanism constructed as described above, the shock absorbing and noise reduction structure of the motor 1 of this embodiment is the same as that of the first embodiment described above. When the direction of the motive force transmitted from the rotor not shown in the figure and the direction of the external power applied to the output gear 125 from the outside are both counterclockwise when viewed from the Z1 side to the Z2 side, the output gear linkage protrusion 1292 of the output gear linkage member 129 will be driven to engage with the tooth groove 12H12 of the ratchet main body 12H1 of the ratchet 12H to limit the rotation of the ratchet 12H, and the rotation of the fourth gear 127 is limited by the friction force between the second contact portion S2 of the fourth gear extension portion 1272 and the first contact portion S1 of the ratchet branch portion 12H2.

[0132] Specifically, when the direction of the motive force transmitted from the unillustrated rotor to the output gear 125 and the direction of the external power applied to the output gear 125 from the outside are both counterclockwise when viewed from the Z1 side to the Z2 side, the output gear linkage member 129 rotates in the counterclockwise direction when viewed from the Z1 side to the Z2 side, and the output gear linkage protrusion 1292 of the output gear linkage member 129 engages with the tooth groove 12H12 of the ratchet body 12H1 of the ratchet 12H (refer to Figure 4 The second contact portion S2 of the fourth gear extension 1272 contacts and slides relatively with the first contact portion S1 of the inner surface of the ratchet 12H to generate a friction force, which is transmitted to the output gear 125 via the fourth gear 127, and generates a friction force f4 on the output gear 125 in the clockwise direction when viewed from the Z1 side to the Z2 side.

[0133] In addition, similar to the first embodiment, the direction of the external power F1 applied to the output gear 125 is counterclockwise when viewed from the Z1 side to the Z2 side. The direction of the motive force F3 transmitted from the rotor to the output gear 125 is counterclockwise when viewed from the Z1 side to the Z2 side.

[0134] Moreover, the friction force f4 is greater than or equal to the external force F1. In this case, the external force F1 acting on the output gear 125 is overcome by the friction force f4. In other words, the motive force F3 acting on the output gear 125 will be subjected to a reverse force (i.e., the resultant force of the friction force f4 and the external force F1 is greater than or equal to zero). Therefore, even if the external force F1 and the motive force F3 act on the output gear 125 in the same counterclockwise direction when viewed from the Z1 side to the Z2 side, the torque acting on the output gear 125 will not increase instantaneously. Therefore, no tooth gap will be generated between the output gear 125 and the fifth gear 12J, and the gear teeth of the two will not collide due to the tooth gap, thereby preventing vibration and noise from being generated between the output gear 125 and the fourth gear 127.

[0135] As described above, the shock-absorbing and noise-reducing structure of the motor 1 of the present embodiment can achieve the same technical effect as that of the first embodiment described above, that is, when the external force on the output gear and the original force are both in the counterclockwise direction, it can prevent the torque acting on the output gear from increasing instantaneously and causing a tooth gap between the output gear and the fourth gear, thereby preventing the output gear and the fourth gear from colliding due to the tooth gap, thereby preventing vibration and noise from being generated between the output gear and the fourth gear.

[0136] On the other hand, driven by the rotor, the output gear 125 rotates clockwise when viewed from the Z1 side toward the Z2 side, and the fourth gear 127 meshing therewith rotates counterclockwise when viewed from the Z1 side toward the Z2 side.

[0137] At this time, the limiting groove 1291 of the output gear linkage member 129 rotates relative to the stopper 131 in the clockwise direction when viewed from the Z1 side to the Z2 side.

[0138] At the same time, the output gear 125 drives the output gear linkage member 129 to rotate in the clockwise direction when viewed from the Z1 side to the Z2 side. During the rotation, the output gear linkage protrusion 1292 engaged in the tooth groove 12H12 between the gear teeth 12H11 of the ratchet body 12H1 of the ratchet 12H is disengaged from the tooth groove 12H12 (refer to Figure 7 ), that is, the engagement between the output gear linkage protrusion 1292 and the tooth groove 12H12 of the ratchet 12H is released, and the ratchet 12H idles in the counterclockwise direction when viewed from the Z1 side to the Z2 side. The output gear linkage protrusion 1292 rotates clockwise until the limit groove 1291 abuts against the right edge of the stopper 131 in the figure (that is, the output gear linkage member 129 rotates 7 degrees clockwise when viewed from the Z1 side to the Z2 side as shown in FIG. 6), and the rotation of the output gear linkage member 129 stops. In this state, the output gear 125 continues to rotate.

[0139] When the power is cut off to motor 1, Figure 5A In the non-excitation state shown, there are two forces acting on the output gear 125: first, the friction force f4 between the output gear 125 and the fourth gear 127; second, the external force F1 applied to the output gear 125 by a weight.

[0140] At this time, since the friction force f4 is greater than the external force F1 , even if the external force F1 is applied to the output gear 125 , the external force F1 will not drive the output gear 125 to rotate.

[0141] Therefore, in the non-excitation state, the output gear 125 maintains a stopped state.

[0142] Thus, according to the vibration reduction and noise reduction structure of the motor 1 of this embodiment, in the non-excitation state, even if the output gear 125 attempts to rotate in the counterclockwise direction when viewed from the Z1 side to the Z2 side under the action of the external power F1 from the outside, it can be stopped by the friction force f4 generated by the damping mechanism. As a result, the braking torque on the output gear 125 can be increased. Therefore, another method that is different from the method of increasing the braking torque by increasing the magnetic properties of the rotor or by energizing in the prior art (output gear self-locking function) can be provided.

[0143] In addition, similar to the first embodiment, in this embodiment, the output shaft 126 is also bonded to the hollow portion of the output gear linkage 129 by an adhesive, so that when the output gear 125 rotates and drives the output gear linkage 129 to rotate synchronously, the output gear 125 drives the output gear linkage 129 to rotate with a small force due to the small adhesive force of the adhesive. When the output gear linkage protrusion 1292 of the output gear linkage 129 as described above is engaged with the tooth groove 12H12 of the ratchet 12H, the output gear linkage 129 stops rotating, and the output shaft 126 rotating synchronously therewith overcomes the adhesive force of the adhesive and drives the output gear 125 to continue rotating, and the rotation speed of the output gear 125 is hardly reduced. Moreover, when the output gear linkage protrusion 1292 of the output gear linkage 129 disengages from the tooth groove 12H12 of the ratchet 12H as described above, and when the output gear linkage linkage 129 is restricted by the stopper 131 and stops rotating, the output shaft 126 rotating synchronously therewith will overcome the adhesive force of the adhesive and drive the output gear 125 to continue rotating, and the rotation speed of the output gear 125 will hardly decrease.

[0144] (Variation of the Second Embodiment)

[0145] In the above embodiment, the case where the output gear 125 rotates in the counterclockwise direction (CCW direction) when viewed from the Z1 side to the Z2 side, and the fourth gear 127 rotates in the clockwise direction (CW direction) when viewed from the Z1 side to the Z2 side, and the arcuate surface 12H11A of the gear tooth 12H11 of the ratchet 12H is inclined toward the clockwise direction is described as an example, but the present invention is not limited to this, and can also be set as the following structure: the output gear 125 rotates in the clockwise direction (CW direction) when viewed from the Z1 side to the Z2 side, and the fourth gear 127 rotates in the counterclockwise direction (CCW direction) when viewed from the Z1 side to the Z2 side, and the arcuate surface 12H11A of the gear tooth 12H11 of the ratchet 12H is inclined toward the counterclockwise direction.

[0146] In this way, when the direction of the original force applied from the rotor to the output gear and the direction of the external force applied to the output gear by the external power are both in the clockwise direction when viewed from the Z1 side to the Z2 side, the damping mechanism composed of the output gear 125, the output gear linkage 129, the fourth gear 127, the fourth gear shaft 128 and the ratchet 12H can also prevent the torque of the output gear 125 in the clockwise direction from increasing instantaneously, so as to prevent the generation of a tooth gap between the output gear 125 and the fourth gear 127, thereby preventing the vibration and noise caused by the tooth gap.

[0147] Above, in order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention is clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0148] In the above-mentioned embodiments and their variations, the limiting groove is formed on the output gear linkage, and the stopper is correspondingly formed on the base, but the present invention is not limited thereto. The limiting groove may also be formed on the base, and the stopper may be formed on the output gear linkage.

[0149] In the above-mentioned embodiment and its modified example, the limiting groove is formed to be rectangular when viewed from the Y2 side to the Y1 side, but the present invention is not limited thereto and may be formed in other shapes.

[0150] In the above-mentioned embodiment and its modified example, the mounting seat and the base are formed integrally, but the present invention is not limited thereto, and they may be formed separately.

[0151] In the above-described embodiment and its modified example, the output gear side flange and the base side flange are both formed in a substantially arc shape, but the present invention is not limited thereto, and may be formed in other shapes.

[0152] In the above-mentioned embodiment and its modified example, the rotation angle range of the stopper in the limiting groove is set to 7 degrees, but the present invention is not limited thereto, and other angles may also be used.

Claims

1. A vibration reduction and noise reduction structure for a motor, comprising: A rotor shaft, wherein the rotor shaft is fixed to the motor housing; A rotor, wherein the rotor is sleeved on the outer circumference of the rotor shaft and can rotate around the rotor shaft, and a rotor gear is arranged on the outer circumference of the upper portion; a transmission mechanism that transmits torque from the rotor to an external device; as well as A base, the base is used for mounting the transmission mechanism, It is characterized in that The transmission mechanism includes: a primary gear meshing with the rotor gear; an intermediate gear meshing with the primary gear; an output gear meshing with the intermediate gear and connected to an external device via an output shaft at a central portion; and a final gear meshing with the output gear. A damping mechanism is also included between the output gear and the base and between the final gear and the base, and the damping mechanism includes: An output gear linkage member, which is substantially cylindrical, is located between the output gear and the base, and can rotate synchronously with the output gear; a ratchet wheel, the ratchet wheel being located between the final gear and the base and elastically supporting the final gear in a manner that the final gear can rotate with resistance relative to the final gear; An output gear linkage protrusion protruding radially outward is formed on a portion of the outer peripheral surface of the output gear linkage member that is directly opposite to the ratchet wheel. The outer peripheral surface of the ratchet wheel is formed with gear teeth arranged along the circumferential direction, and a tooth groove is formed between two adjacent gear teeth. When the direction of the motive force transmitted from the rotor to the output gear is the same as the direction of the external force applied to the output gear by the external force, the output gear linkage protrusion of the output gear linkage member engages with the tooth groove of the ratchet to apply a force to the output gear that is opposite to the direction of the external force and greater.

2. The motor vibration reduction and noise reduction structure according to claim 1, characterized in that: The output gear linkage is formed with a limiting groove opening toward one side of the base. A stopper protruding toward one side of the output gear linkage member is formed at a position corresponding to the base and the limiting groove. The stopper is inserted into the limiting groove to limit the limiting groove to reciprocate within a certain range.

3. The vibration reduction and noise reduction structure of the motor according to claim 1 or 2, characterized in that: The ratchet includes a cylindrical ratchet main body and a first branch part, a second branch part, a third branch part and a fourth branch part arranged in a circumferential direction of the ratchet main body and converging toward the center as it moves toward the final gear side. The first branch portion to the fourth branch portion elastically support the final-stage gear in an openable or convergent manner.

4. The motor vibration reduction and noise reduction structure according to claim 3, characterized in that: A plurality of gear teeth are arranged on the outer peripheral surface of the ratchet main body, and the plurality of gear teeth are respectively formed to include an arc-shaped surface extending toward one circumferential side in a circular arc shape as it extends from the radial inside to the radial outside, and a straight surface extending linearly toward the radial inside from the radial outermost point of the arc-shaped surface, and tooth grooves are formed between adjacent gear teeth.

5. The motor vibration reduction and noise reduction structure according to claim 3, characterized in that: A first contact portion having a friction coefficient greater than that of other portions is formed on the outer peripheral surface of the final gear. A second contact portion having a larger friction coefficient than that of other portions is formed at a portion of the inner circumferential surface of the first branch portion to the fourth branch portion of the ratchet corresponding to the first contact portion. The first contact portion contacts the second contact portion to elastically support the final-stage gear on the first to fourth branch portions of the ratchet wheel.

6. The motor vibration reduction and noise reduction structure according to claim 5, characterized in that: A second contact portion, a gap portion which is separated from the final gear by a gap, and a sliding portion which allows the final gear to slide are sequentially formed on the inner circumferential surfaces of the first to fourth branch portions along the insertion direction of the final gear.

7. The vibration reduction and noise reduction structure of a motor according to any one of claims 1 to 2 and 4 to 6, characterized in that: The output gear linkage is formed with a notch portion for avoiding surrounding gears, and the notch portion is composed of a first notch surface cut from the radial outer side to the radial inner side and a second notch surface cut along the axial direction at the radial inner side.

8. The vibration reduction and noise reduction structure of a motor according to any one of claims 1 to 2 and 4 to 6, characterized in that: Arc-shaped flanges are respectively formed on a surface of the output gear linkage member that contacts the output gear and a surface that contacts the base.

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