Folding driving device capable of reducing noise

Abstract

The invention discloses a folding driving device capable of reducing noise. The folding driving device comprises a driving mechanism, a gear assembly, a transmission assembly and a rotating seat used for being fixedly connected with a mirror base. The transmission assembly and the gear assembly are coaxially arranged and can be in transmission connection with the gear assembly; the gear assembly is in transmission connection with the output end of the driving mechanism; the transmission assembly and the rotating seat are coaxially arranged and are always connected in a relatively static manner; a limiting groove is formed in the side, facing the rotating base, of the base. An elastic piece and a limiting assembly used for limiting the limiting groove are arranged on the side, facing the base, of the rotating base, and the elastic piece can enable a gap to be generated between the rotating base and the base. When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat is attached to the base. In the invention, the transmission resistance between the base and the rotating seat can be reduced in the folding process of the rearview mirror, and meanwhile, the entering of wind and sand can be avoided and the generation of wind noise can be reduced after the rearview mirror is folded or unfolded in place.

Description

[0001] This case is a divisional application based on the invention patent with application date of February 9, 2021, application number 2021101812196, and name of a folding drive device. Technical Field

[0002] The invention relates to the field of automobile accessories, in particular to a folding driving device capable of reducing noise. Background Art

[0003] The rearview mirror folding drive device is usually installed between the mirror base plate (mounted with the rearview mirror) and the mirror base (connected to the door) to drive the rearview mirror to be electrically folded. The existing rearview mirror folding drive device usually only has a rotation function but no lifting function, or it can be slowly lifted in a spiral manner while rotating.

[0004] In the early days of the development of the automotive industry, electric rearview mirror assemblies that only had a rotation function often required a rotation gap to be reserved between the mirror substrate and the mirror base when designing the rearview mirror in order to reduce the friction resistance between the mirror substrate and the mirror base during electric folding. When there is a rotation gap between the mirror substrate and the mirror base, the wind noise during driving is relatively large; in addition, when there is a rotation gap between the mirror substrate and the mirror base, it is easy for wind and sand to enter, which in turn increases the relative rotation resistance between the mirror substrate and the mirror base, and the current increases when the motor is running, which causes the rearview mirror to be unable to fold into place, and even causes the rearview mirror to fail to fold.

[0005] In recent years, with the development of the automobile industry, electric rearview mirror assemblies with rotation functions and the ability to slowly lift the mirror substrate have gradually emerged. During the folding process of the rearview mirror, a relatively small rotation gap can be generated between the mirror substrate and the mirror base, or an elastic windproof rubber strip can be added to block wind and sand. Under normal conditions, this method can solve the problem of high wind noise or wind and sand entering. However, due to the following defects of the slow lifting mechanism during rotation: at the beginning of the rotation, the resistance caused by the small axial gap is still greater than the friction resistance when the axial gap is larger after a certain angle of rotation, so the folding start is often slow or fails, and after the lifting mechanism is used for a certain number of folding times within a period of time, the rubber will wear and wind noise will occur. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a folding drive device to ensure that there is no gap in the folding part of the rearview mirror when the vehicle is driving, and to reduce the rotation resistance when the rearview mirror needs to be folded.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A folding drive device, comprising a housing for transmission connection with a mirror base plate and a base connected to the housing, and also comprising a driving mechanism, a gear assembly, a transmission assembly and a rotating seat for fixed connection with the mirror base;

[0009] The fixed end of the driving mechanism is installed in an assembly chamber formed by the first end of the housing and the first end of the base;

[0010] The transmission assembly and the gear assembly are both installed between the housing and the base;

[0011] The transmission assembly and the gear assembly are sequentially arranged on the second end of the base from bottom to top, and the base can rotate relative to the gear assembly;

[0012] The transmission assembly is coaxially arranged with the gear assembly and can be transmission-connected with the gear assembly;

[0013] The gear assembly is drivingly connected to the output end of the driving mechanism;

[0014] The transmission assembly is coaxially arranged with the rotating seat and is always relatively statically connected;

[0015] A limiting groove is provided on one side of the base facing the rotating seat;

[0016] An elastic member and a limiting assembly for limiting the limiting groove are provided on one side of the rotating seat facing the base, and the elastic member can create a gap between the rotating seat and the base;

[0017] When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat fits the base.

[0018] The beneficial effects of the present invention are as follows: a rotating seat is fixed on the mirror base, a transmission assembly is fixed through the rotating seat, and the gear assembly is connected to the transmission assembly in a transmission manner, so that the housing and the base can move relative to the gear assembly under the drive of the driving mechanism, thereby realizing the folding and unfolding of the rearview mirror. Due to the arrangement of the elastic member, there is always a gap between the base and the rotating seat during the relative movement of the base and the rotating seat, thereby reducing the rotation resistance. When the base is limited by the limiting assembly, the gear assembly is continuously subjected to a driving force in the opposite direction, so that the gear assembly moves simultaneously in the axial direction and the circumferential direction under the drive of the driving mechanism, and then presses against the transmission assembly, and the base is pressed in the axial direction by the transmission assembly, so that the rotating seat and the base are fitted, and the rearview mirror will be in a stationary state. In the process of folding and unfolding the rearview mirror, the present invention uses the action of the elastic member to always have a gap between the base and the rotating seat, thereby reducing the friction resistance, and after rotating in place, the base can be in close contact with the rotating seat, thereby overcoming the defects of easy sand entry and wind noise between the mirror substrate and the mirror base of the rearview mirror, thereby extending the service life of the rearview mirror driving device, and ensuring the effectiveness of the folding and unfolding of the rearview mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The invention discloses an explosion-proof folding drive device. Figure 1 ;

[0020] Figure 2 The invention discloses an explosion-proof folding drive device. Figure 2 ;

[0021] Figure 3 A partial explosion of a folding drive device in the present invention Figure 1 ;

[0022] Figure 4 for Figure 3 A magnified view of part A;

[0023] Figure 5 for Figure 3 A magnified view of part B;

[0024] Figure 6 A partial explosion of a folding drive device in the present invention Figure 2 ;

[0025] Figure 7 for Figure 6 Enlarged view of part C;

[0026] Figure 8 is a cross-sectional view of the base and the worm assembly of the present invention;

[0027] Fig. 9 A cross-sectional view of a folding drive device in the present invention in a moving state Figure 1 ;

[0028] Fig.10 A cross-sectional view of a folding drive device in the present invention in a folded and stationary state Figure 1 ;

[0029] Fig.11 for Fig.10 A cross-sectional view of section D;

[0030] Fig.12 It is a structural schematic diagram of the mirror base and the mirror substrate in the present invention;

[0031] Fig.13 A partial explosion of a folding drive device in the present invention Figure 3 ;

[0032] Fig.14 for Fig.13 Enlarged view of part E in the middle;

[0033] Fig.15 A cross-sectional view of a folding drive device in the present invention in a moving state Figure 1 ;

[0034] Fig.16 A cross-sectional view of a folding drive device in the present invention in a folded and stationary state Figure 2 ;

[0035] Fig.17 for Fig.16 Enlarged view of part F.

[0036] Description of labels:

[0037] 1. Mirror substrate; 11. Stop block;

[0038] 2. Mirror base; 21. Limiting convex block;

[0039] 3. Shell; 31. Upper cover; 32. Lower shell;

[0040] 4. Base; 40. Assembly chamber; 41. Clamp ring; 42. Limiting groove; 421. Third climbing slope; 422. Stop surface; 43. U-shaped groove;

[0041] 5. driving mechanism; 51. driving motor; 52. worm assembly; 521. worm body; 522. transmission gear; 53. shaft sleeve;

[0042] 6. Gear assembly; 61. Boss; 623. Fourth climbing slope; 624. Fifth climbing slope; 611. Sixth climbing slope; 612. Seventh climbing slope; 62. Position limiting card platform; 621. First step surface; 622. Second step surface; 63. Wear-resistant gasket;

[0043] 7. Transmission assembly; 71. Raised rib; 72. Gear washer; 721. Guide groove; 7211. First climbing slope; 7212. Second climbing slope;

[0044] 8. Rotating seat; 81. Card slot; 82. Lifting slot; 83. Blind hole; 84. Groove;

[0045] 9. elastic member; 91. limiting part;

[0046] 10. Limiting assembly; 101. First spring; 102. Stop pin;

[0047] 20. Rotating shaft; 201. Limiting card table;

[0048] 30. Second spring; 50. Rearview mirror; 60. Elastic member. DETAILED DESCRIPTION

[0049] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0050] Please refer to Figure 1-Figure 17 , a folding drive device, comprising a housing for transmission connection with a mirror base plate and a base connected to the housing, and also comprising a driving mechanism, a gear assembly, a transmission assembly and a rotating seat for fixed connection with the mirror base;

[0051] The fixed end of the driving mechanism is installed in an assembly chamber formed by the first end of the housing and the first end of the base;

[0052] The transmission assembly and the gear assembly are both installed between the housing and the base;

[0053] The transmission assembly and the gear assembly are sequentially arranged on the second end of the base from bottom to top, and the base can rotate relative to the gear assembly;

[0054] The transmission assembly is coaxially arranged with the gear assembly and can be transmission-connected with the gear assembly;

[0055] The gear assembly is drivingly connected to the output end of the driving mechanism;

[0056] The transmission assembly is coaxially arranged with the rotating seat and is always relatively statically connected;

[0057] A limiting groove is provided on one side of the base facing the rotating seat;

[0058] An elastic member and a limiting assembly for limiting the limiting groove are provided on one side of the rotating seat facing the base, and the elastic member can create a gap between the rotating seat and the base;

[0059] When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat fits the base.

[0060] The working principle of the present invention is:

[0061] When the rearview mirror is in motion, the base and the gear assembly can move relative to each other, the axial pressure of the gear assembly on the rotating seat is removed, and a gap is generated between the rotating seat and the base under the push of the elastic member, thereby reducing the transmission resistance;

[0062] When the rearview mirror is folded or unfolded into place, that is, the base is limited and the gear assembly is still subjected to axial driving force, the gear assembly will be lifted, exerting pressure on the rotating seat, so that the rotating seat and the base fit together, and the gap is closed, avoiding wind noise and preventing sand from entering.

[0063] From the above description, it can be seen that the beneficial effects of the present invention are: fixing the rotating seat on the mirror base, fixing the transmission assembly through the rotating seat, and making the gear assembly and the transmission assembly transmission connected, so that the shell and the base can move relative to the gear assembly under the drive of the driving mechanism, so as to realize the folding and unfolding of the rearview mirror. Due to the setting of the elastic member, there is always a gap between the base and the rotating seat during the relative movement of the base and the rotating seat, which reduces the rotation resistance. When the base is limited by the limiting assembly, the gear assembly is continuously subjected to a driving force in the opposite direction, so the gear assembly moves simultaneously in the axial and circumferential directions under the drive of the driving mechanism, and then presses against the transmission assembly, and applies pressure to the base in the axial direction through the transmission assembly, so that the rearview mirror will be in a stationary state after the rotating seat and the base are fitted. The present invention ensures that there is always a gap between the base and the rotating seat through the action of the elastic member during the folding and unfolding process of the rearview mirror, thereby reducing friction resistance, and enables the base to be in close contact with the rotating seat after being rotated into place, thereby overcoming the defects of easy entry of sand and wind noise between the mirror substrate and the mirror base of the rearview mirror, prolonging the service life of the rearview mirror driving device, and ensuring the effectiveness of the folding and unfolding of the rearview mirror.

[0064] Further, the transmission assembly includes a convex rib and a hollow gear washer;

[0065] The gear gasket is sleeved on the outer side of one end of the rotating seat;

[0066] The convex rib is arranged on the inner circumference of the gear gasket and is used for engaging with the clamping groove on the outer surface of the rotating seat.

[0067] From the above description, it can be seen that a convex rib is provided to connect the gear gasket to the rotating seat relatively statically, and since the gear assembly can be transmission-connected to the gear gasket, when the driving mechanism is driven and the base is not limited, the base and the shell can rotate relative to the gear assembly, the gear gasket and the rotating seat, thereby realizing the folding and unfolding of the rearview mirror.

[0068] Furthermore, the gear gasket is provided with a guide groove in the circumferential direction;

[0069] A boss matching the guide groove is arranged on one side of the gear assembly facing the gear gasket. When the boss is embedded in the guide groove, the gear gasket can rotate with the gear assembly.

[0070] It can be seen from the above description that the boss is provided to improve the transmission reliability between the gear gasket and the transmission assembly.

[0071] Furthermore, the guide groove has a first climbing slope and a second climbing slope at two ends in the circumferential direction respectively;

[0072] When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the boss can move up along the first climbing slope or the second climbing slope to enable the gear gasket to press the elastic member up and down in the axial direction.

[0073] From the above description, it can be seen that the first climbing slope and the second climbing slope are set so that when the gear assembly is subjected to driving forces in different directions, both can climb smoothly and apply pressure to the rotating seat so that the base is pressed against the rotating seat, thereby avoiding the occurrence of gaps during the operation or stationary process of the car, ensuring that there is no wind noise, and preventing wind and sand from entering, thereby reducing transmission resistance.

[0074] Furthermore, a lifting groove for assembling the elastic member is provided in the circumferential direction on one side of the rotating seat facing the shell;

[0075] The two ends of the elastic member are respectively pressed against the two sides of the lifting groove in the circumferential direction, and the middle part of the elastic member is arched, and the highest point in the middle part of the elastic member is higher than the top of the lifting groove in the axial direction.

[0076] From the above description, it can be seen that the lifting groove is provided to limit the elastic member in the circumferential direction, to ensure that the elastic member can lift the base in the axial direction, to ensure that a gap is generated during the rotation of the base, and to reduce the rotational resistance.

[0077] Further, one end of the limiting groove has a third climbing slope, and the other end of the limiting groove has a stop surface for limiting the limiting assembly;

[0078] There are a plurality of limit grooves, and the plurality of limit grooves are evenly distributed in the circumferential direction and arranged in sequence.

[0079] From the above description, it can be seen that one of the rotation directions of the base is limited in the circumferential direction, and a third climbing slope is set in the other rotation direction. The limiting component can be inserted into the adjacent limiting groove to make the base rotate smoothly, ensuring that the rearview mirror can be rotated into place. When the base rotates toward the side where the third climbing slope is located, the base is limited by the limiting structure between the mirror substrate and the mirror base, which can also achieve the effect of limiting the base and making the gear assembly climb, ensuring that the base is pressed against the rotating seat to avoid the entry of wind and sand and the generation of wind noise.

[0080] Further, the limiting assembly includes a first spring and a stop pin;

[0081] A blind hole is formed on one side of the rotating seat facing the base;

[0082] The first spring and one end of the stop pin are sequentially installed in the blind hole along the axial direction, and the first spring is coaxially arranged with the stop pin.

[0083] From the above description, it can be seen that since the stop pin should always move in the limit groove during the operation of the base, a first spring and a stop pin are provided to push the stop pin to move axially, ensuring that the stop pin can limit the base and improve the reliability of the base movement.

[0084] Further, it also includes a rotating shaft and a second spring;

[0085] The second spring is sleeved on the outer side of the rotating shaft;

[0086] A limit clamping platform is arranged on the outer side of one end of the rotating shaft away from the base;

[0087] The second spring is located between the limit clamp and the gear assembly, and is used to push the gear assembly to reset;

[0088] The rotating shaft is inserted from a side of the housing away from the base and passes through the gear assembly and the transmission assembly in sequence to be relatively statically connected to the rotating seat.

[0089] From the above description, it can be seen that a second spring is provided to apply axial pressure to the gear assembly to ensure that when the reverse force applied to the base in the circumferential direction is removed, the driving mechanism applies a reverse driving force to the gear assembly and, under the push of the second spring, drives the gear assembly to reset, thereby ensuring that a gap is generated between the base and the rotating seat during the rotation of the rearview mirror to reduce the transmission resistance.

[0090] Further, the drive mechanism includes a worm assembly;

[0091] The two ends of the worm assembly in the axial direction are respectively provided with shaft sleeves;

[0092] The base is provided with a worm groove for providing a rotation space for the worm assembly;

[0093] A U-shaped groove is respectively provided at both ends of the worm groove;

[0094] Both ends of the worm assembly are embedded in the U-shaped groove;

[0095] An elastic member is arranged in the U-shaped groove, and the elastic member can be pressed against the shaft sleeve.

[0096] From the above description, it can be seen that shaft sleeves are arranged at both ends of the worm assembly. When the motor of the driving mechanism drives the worm assembly to rotate forward or reverse, there is an instantaneous axial driving force, which will drive the worm assembly to move axially. The elastic member is arranged to provide a reverse force for the worm assembly in the axial direction, thereby avoiding collision between the worm assembly and the U-shaped groove 4, and thus avoiding the generation of noise.

[0097] Furthermore, the guide groove has a first climbing slope and a second climbing slope at two ends in the circumferential direction respectively;

[0098] A limiting platform is provided on a side of the gear assembly facing the gear gasket, and the boss is provided on a side of the limiting platform facing the gear gasket;

[0099] When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the boss can move up along the first climbing slope or the second climbing slope, and one end of the limiting platform presses against the side of the gear gasket facing the housing.

[0100] From the above description, it can be seen that the first climbing slope and the second climbing slope are set so that when the gear assembly is subjected to driving forces in different directions, both can climb smoothly and apply pressure to the rotating seat so that the base is pressed against the rotating seat, thereby avoiding the occurrence of gaps during the operation or stationary process of the car, ensuring that there is no wind noise, and preventing wind and sand from entering, thereby reducing transmission resistance.

[0101] The present invention is applicable to various folding scenarios, and is particularly applicable to electric rearview mirrors. In the present invention, each embodiment is described by taking an electric rearview mirror as an example.

[0102] Embodiment 1

[0103] Reference Figure 1-Figure 17A folding drive device includes a housing 3 for transmission connection with a mirror base plate 1 and a base 4 connected to the housing 3, and also includes a driving mechanism 5, a gear assembly 6, a transmission assembly 7 and a rotating seat 8 for fixed connection with the mirror base 2; the fixed end of the driving mechanism 5 is installed in an assembly chamber 40 formed by the first end of the housing 3 and the first end of the base 4; the transmission assembly 7 and the gear assembly 6 are both installed between the housing 3 and the base 4; the transmission assembly 7 and the gear assembly 6 are sequentially arranged on the second end of the base 4 from bottom to top, and the base 4 can rotate relative to the gear assembly 6; the transmission assembly 7 and the gear assembly 6 are coaxial The gear assembly 6 is provided and can be connected to the transmission of the gear assembly 6; the gear assembly 6 is connected to the output end of the driving mechanism 5; the transmission assembly 7 is coaxially arranged with the rotating seat 8 and is always relatively statically connected; the base 4 is provided with a limiting groove 42 on the side facing the rotating seat 8; the rotating seat 8 is provided with an elastic member 9 and a limiting assembly 10 for limiting the limiting groove 42 on the side facing the base 4, and the elastic member 9 can generate a gap between the rotating seat 8 and the base 4; when the base 4 is limited and the gear assembly 6 continues to rotate in the limited direction, the gear assembly 6 presses against the transmission assembly 7 in the axial direction, so that the rotating seat 8 fits with the base 4. Specifically, the housing 3 is detachably connected to the base 4; the base 4 is fixed to the rotating seat 8 by a clamping ring 41.

[0104] In this embodiment, during the unfolding process of the rearview mirror 50, after the base 4 is rotated into place, it will be limited by the limiting assembly 10. At this time, the gear assembly 6 climbs up and presses down the transmission assembly 7 and the base 4, so that the base 4 is pressed against the rotating seat 8 to eliminate the gap; during the folding process of the rearview mirror 50, after the base 4 is rotated into place, a limiting structure is provided between the mirror substrate 1 and the mirror base 2 of the rearview mirror 50, and the limiting of the shell 3 is achieved by limiting the mirror substrate 1, thereby causing the gear assembly 6 to climb in the opposite direction. Similarly, after the gear assembly 6 climbs up, it presses down the transmission assembly 7 and the base 4, so that the base 4 is pressed against the rotating seat 8 to eliminate the gap.

[0105] Specifically, refer to Fig.12 The limiting structure includes a stop block 11 arranged on the mirror substrate 1 and a limiting protrusion 21 arranged on the mirror base 2. When the rearview mirror 50 is folded into place, the base 4 is also rotated into place. At this time, the stop block 11 presses against one side of the limiting protrusion 21 in the circumferential direction, so that the mirror substrate 1 cannot be further folded.

[0106] Embodiment 2

[0107] It should be noted that, in the present embodiment, the rearview mirror 50 is taken as an example of the left rearview mirror 50 of a car, and the clockwise direction and the counterclockwise direction are both directions when viewed from a top-down angle.

[0108] Reference Figure 1-Figure 11A folding drive device, based on the first embodiment, the transmission assembly 7 includes a convex rib 71 and a hollow gear gasket 72; the gear gasket 72 is sleeved on the outer side of one end of the rotating seat 8; the convex rib 71 is arranged on the inner circumference of the gear gasket 72, and is used to engage with the slot 81 on the outer surface of the rotating seat 8. Preferably, six convex ribs 71 are provided.

[0109] Reference Figure 1-Figure 11 The gear washer 72 is provided with a guide groove 721 in the circumferential direction; the gear assembly 6 is provided with a boss 61 matching the guide groove 721 on one side facing the gear washer 72, and when the boss 61 is embedded in the guide groove 721, the gear washer 72 can rotate with the gear assembly 6. Optionally, one or more bosses 61 and guide grooves 721 may be provided, and preferably, three bosses 61 and three guide grooves 721 are provided.

[0110] Reference Figure 1-Figure 11 , the two ends of the guide groove 721 in the circumferential direction respectively have a first climbing slope 7211 and a second climbing slope 7212; the gear assembly 6 is provided with a limiting platform 62 on the side facing the gear gasket 72, and the boss 61 is provided on the side of the limiting platform 62 facing the gear gasket 72; when the limiting assembly 10 is limited and the gear assembly 6 continues to rotate in the limited direction, the boss 61 can move up along the first climbing slope 7211 or the second climbing slope 7212, and one end of the limiting platform 62 is pressed against the side of the gear gasket 72 facing the housing 3. Specifically, the limiting platform 62 has a first step surface 621 and a second step surface 622, and the first step surface 621 and the second step surface 622 are transitionally connected with the side of the gear gasket 72 facing the base 4 through a fourth climbing slope 623 and a fifth climbing slope 624 respectively; the boss 61 has a sixth climbing slope 611 and a seventh climbing slope 612 on both sides in the circumferential direction respectively. Preferably, three limiting platforms 62 are provided.

[0111] Reference Figure 1-Figure 11 The rotating seat 8 has a lifting groove 82 for assembling the elastic member 9 on the side facing the housing 3 in the circumferential direction; the two ends of the elastic member 9 are respectively pressed against the two sides of the lifting groove 82 in the circumferential direction, and the middle of the elastic member 9 is arched, and the highest point in the middle of the elastic member 9 is higher than the top of the lifting groove 82 in the axial direction. Optionally, one or more lifting grooves 82 and elastic member 9 can be provided, and preferably, three lifting grooves 82 and three elastic members 9 are provided.

[0112] Reference Figure 1-Figure 11 One end of the limiting groove 42 has a third climbing slope 421, and the other end of the limiting groove 42 has a stop surface 422 for limiting the limiting assembly 10; a plurality of limiting grooves 42 are provided, and the plurality of limiting grooves 42 are evenly distributed in the circumferential direction and arranged in sequence. Preferably, three limiting grooves 42 are provided.

[0113] Reference Figure 1-Figure 11 The limiting assembly 10 includes a first spring 101 and a stop pin 102; a blind hole 83 is provided on the side of the rotating seat 8 facing the base 4; one end of the first spring 101 and the stop pin 102 are sequentially installed in the blind hole 83 along the axial direction, and the other end of the stop pin 102 is always located in the limiting groove 42, and the first spring 101 is coaxially arranged with the stop pin 102. Optionally, one or more limiting assemblies 10 may be provided, and preferably, three limiting assemblies 10 are provided.

[0114] Reference Figure 1-Figure 11 , further comprising a rotating shaft 20 and a second spring 30; the second spring 30 is sleeved on the outer side of the rotating shaft 20; a limit clamping table 201 is arranged on the outer side of the end of the rotating shaft 20 away from the base 4; the second spring 30 is located between the limit clamping table 201 and the gear assembly 6, and is used to push the gear assembly 6 to reset; the rotating shaft 20 is inserted from the side of the housing 3 away from the base 4 and sequentially passes through the gear assembly 6 and the transmission assembly 7 and is relatively statically connected to the rotating seat 8. Preferably, the first spring 101 and the second spring 30 are both compression springs. Specifically, a wear-resistant gasket 63 is provided between the second spring 30 and the gear assembly 6.

[0115] Reference Figure 1-Figure 11 The driving mechanism 5 includes a driving motor 51 and a worm assembly 52 ; the worm assembly 52 is installed between the base 4 and the housing 3 ; the output end of the driving motor 51 is transmission-connected to the gear assembly 6 through the worm assembly 52 .

[0116] Reference Figure 1-Figure 11 The worm assembly 52 includes a worm body 521 and a transmission gear 522 ; the transmission gear 522 is meshed with the output end of the drive motor 51 ; the transmission gear 522 forms a worm gear transmission structure through the worm body 521 and the gear assembly 6 for transmitting the gear assembly 6 .

[0117] Reference Figure 1-Figure 11 Specifically, one end of the elastic member 9 has a right-angled edge and the other end is flat. The two ends of the elastic member 9 are in an arch bridge shape, and the outer edge of the middle part of the elastic member 9 has a limiting portion 91, which can be axially embedded in the groove 84 on the outer circumference of the rotating seat 8.

[0118] The specific implementation process of this embodiment is as follows:

[0119] Reference Fig. 9 When the rearview mirror 50 is in the folding process, the base 4 rotates counterclockwise relative to the gear assembly 6, the stopper 62 and the boss 61 slide into the guide groove 721 and are embedded with each other, the gear assembly 6 and the gear gasket 72 remain stationary, and at this time, the stop pin 102 and the guide groove 721 move relative to each other, and the stop pin 102 enters the next guide groove 721 along the third climbing slope 421;

[0120] During this process, the arched portion of the elastic sheet props up the base 4, so that there is always a gap a between the base 4 and the rotating base 8, and the distance of the gap a is 0.4mm-1.0mm;

[0121] Until the mirror substrate 1 is rotated into position and the mirror substrate 1 is limited by the mirror base 2, the shell 3 and the base 4 are limited, and the driving motor 51 continuously applies force to the gear assembly 6 in the clockwise direction, so that the fifth climbing slope 624 and the seventh climbing slope 612 move up along the second climbing slope 7212 in sequence, and the second step surface 622 is pressed against the side of the gear gasket 72 facing the gear assembly 6. At this time, the base 4 applies pressure to the elastic member 9, and the base 4 fits tightly with the rotating seat 8 to eliminate the gap a. There is a gap b between the gear assembly 6 and the gear gasket 72, and the distance of the gap b is equal to the distance of the gap a.

[0122] Reference Fig.10 and Fig.11 When the rearview mirror 50 is in the process of being deployed, the base 4 rotates clockwise relative to the gear assembly 6, the seventh climbing slope 612 moves down along the second climbing slope 7212, the stop platform 62 and the boss 61 both slide into the guide groove 721 and are embedded with each other, the gear assembly 6 and the gear gasket 72 remain stationary, at this time, the stop pin 102 and the guide groove 721 move relative to each other, and the stop surface 422 gradually approaches the stop pin 102;

[0123] During this process, the arched portion of the middle of the elastic member 9 props up the base 4, so that there is always a gap between the base 4 and the rotating base 8;

[0124] Until the stop surface 422 is in contact with the stop pin 102, the base 4 is limited, and the fourth climbing slope 623 and the sixth climbing slope 611 move up along the first climbing slope 7211 in sequence, and make the second step surface 622 press against the side of the gear gasket 72 facing the gear assembly 6. At this time, the base 4 applies pressure to the elastic part 9, and the base 4 is tightly fitted with the rotating seat 8 to eliminate the gap a. There is a gap b between the gear assembly 6 and the gear gasket 72, and the distance of the gap b is equal to the distance of the gap a.

[0125] Embodiment 3

[0126] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 A folding drive device, based on the first embodiment, the transmission assembly 7 includes a convex rib 71 and a hollow gear gasket 72; the gear gasket 72 is sleeved on the outer side of one end of the rotating seat 8; the convex rib 71 is arranged on the inner circumference of the gear gasket 72, and is used to engage with the slot 81 on the outer surface of the rotating seat 8. Preferably, six convex ribs 71 are provided.

[0127] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 The gear washer 72 is provided with a guide groove 721 in the circumferential direction; the gear assembly 6 is provided with a boss 61 matching the guide groove 721 on one side facing the gear washer 72, and when the boss 61 is embedded in the guide groove 721, the gear washer 72 can rotate with the gear assembly 6. Optionally, one or more bosses 61 and guide grooves 721 may be provided, and preferably, three bosses 61 and three guide grooves 721 are provided.

[0128] Reference Figure 7 , the guide groove 721 has a first climbing slope 7211 and a second climbing slope 7212 at both ends in the circumferential direction; when the limiting assembly 10 is limited and the gear assembly 6 continues to rotate in the limited direction, the boss 61 can move up along the first climbing slope 7211 or the second climbing slope 7212, so as to make the gear gasket 72 press the elastic member 9 up and down in the axial direction. Specifically, the boss 61 has a sixth climbing slope 611 and a seventh climbing slope 612 at both sides in the circumferential direction.

[0129] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 The rotating seat 8 has a lifting groove 82 for assembling the elastic member 9 on the side facing the housing 3 in the circumferential direction; the two ends of the elastic member 9 are respectively pressed against the two sides of the lifting groove 82 in the circumferential direction, and the middle of the elastic member 9 is arched, and the highest point in the middle of the elastic member 9 is higher than the top of the lifting groove 82 in the axial direction. Optionally, one or more lifting grooves 82 and elastic member 9 can be provided, and preferably, three lifting grooves 82 and three elastic members 9 are provided.

[0130] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 One end of the limiting groove 42 has a third climbing slope 421, and the other end of the limiting groove 42 has a stop surface 422 for limiting the limiting assembly 10; a plurality of limiting grooves 42 are provided, and the plurality of limiting grooves 42 are evenly distributed in the circumferential direction and arranged in sequence. Preferably, three limiting grooves 42 are provided.

[0131] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17The limit assembly 10 includes a first spring 101 and a stop pin 102; a blind hole 83 is provided on the side of the rotating seat 8 facing the base 4; one end of the first spring 101 and the stop pin 102 are sequentially installed in the blind hole 83 along the axial direction, and the other end of the stop pin 102 is always located in the guide groove 721, and the first spring 101 is coaxially arranged with the stop pin 102. Optionally, one or more limit assemblies 10 may be provided, and preferably, three limit assemblies 10 are provided.

[0132] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 , further comprising a rotating shaft 20 and a second spring 30; the second spring 30 is sleeved on the outer side of the rotating shaft 20; a limit clamping table 201 is arranged on the outer side of the end of the rotating shaft 20 away from the base 4; the second spring 30 is located between the limit clamping table 201 and the gear assembly 6, and is used to push the gear assembly 6 to reset; the rotating shaft 20 is inserted from the side of the housing 3 away from the base 4 and sequentially passes through the gear assembly 6 and the transmission assembly 7 and is relatively statically connected to the rotating seat 8. Preferably, the first spring 101 and the second spring 30 are both compression springs. Specifically, a wear-resistant gasket 63 is provided between the second spring 30 and the gear assembly 6.

[0133] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 The driving mechanism 5 includes a driving motor 51 and a worm assembly 52 ; the worm assembly 52 is installed between the base 4 and the housing 3 ; the output end of the driving motor 51 is transmission-connected to the gear assembly 6 through the worm assembly 52 .

[0134] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 The worm assembly 52 includes a worm body 521 and a transmission gear 522 ; the transmission gear 522 is meshed with the output end of the drive motor 51 ; the transmission gear 522 forms a worm gear transmission structure through the worm body 521 and the gear assembly 6 for transmitting the gear assembly 6 .

[0135] Reference Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 12-Figure 17 Specifically, one end of the elastic member 9 has a right-angled edge and the other end is flat. The two ends of the elastic member 9 are in an arch bridge shape, and the outer edge of the middle part of the elastic member 9 has a limiting portion 91, which can be axially embedded in the groove 84 on the outer circumference of the rotating seat 8.

[0136] The specific implementation process of this embodiment is as follows:

[0137] Reference Fig.15 When the rearview mirror 50 is in the folding process, the base 4 rotates counterclockwise relative to the gear assembly 6, the boss 61 slides into the guide groove 721 and is embedded with each other, the gear assembly 6 and the gear gasket 72 remain stationary, and at this time, the stop pin 102 and the guide groove 721 move relative to each other, and the stop pin 102 enters the next guide groove 721 along the third climbing slope 421;

[0138] During this process, the arched portion of the middle of the elastic member 9 props up the base 4, so that there is always a gap a between the base 4 and the rotating base 8, and the distance of the gap a is 0.4mm-1.0mm;

[0139] Until the mirror substrate 1 is rotated into position and the mirror substrate 1 is limited by the mirror base 2, the housing 3 and the base 4 are limited, and the driving motor 51 continuously applies force to the gear assembly 6 in the clockwise direction, so that the seventh climbing slope 612 moves up along the second climbing slope 7212. At this time, the base 4 applies pressure to the elastic member 9, and the base 4 is tightly fitted with the rotating seat 8 to eliminate the gap;

[0140] Reference Fig.16 and Fig.17 When the rearview mirror 50 is in the process of being deployed, the base 4 rotates clockwise relative to the gear assembly 6, the seventh climbing slope 612 moves down along the second climbing slope 7212, the boss 61 slides into the guide groove 721 and is embedded with each other, the gear assembly 6 and the gear gasket 72 remain stationary, and at this time, the stop pin 102 and the guide groove 721 move relative to each other, and the stop surface 422 gradually approaches the stop pin 102;

[0141] During this process, the arched portion of the middle of the elastic member 9 props up the base 4, so that there is always a gap between the base 4 and the rotating base 8;

[0142] Until the stop surface 422 fits with the stop pin 102, the base 4 is limited, and the sixth climbing slope 611 moves up along the first climbing slope 7211. At this time, the base 4 applies pressure to the elastic member 9, and the base 4 fits tightly with the rotating seat 8 to eliminate the gap.

[0143] Embodiment 4

[0144] Reference Figure 6 and Figure 8A folding drive device, based on the first or second or third embodiment, the worm assembly 52 is provided with a sleeve 53 at both ends in the axial direction, the base 4 is provided with a worm groove for providing a rotation space for the worm assembly 52, and a U-shaped groove 43 is provided at both ends of the worm groove. An elastic member 60 is installed in the U-shaped groove 43, and the elastic member 60 can be pressed against the sleeve 53. When the driving motor 51 drives the worm assembly 52 to rotate forward or reverse, there is an instantaneous axial driving force, which will drive the worm assembly 52 to move axially. The elastic member 60 is provided to provide a reverse force for the worm assembly 52 in the axial direction, so as to avoid the collision between the worm assembly 52 and the U-shaped groove 43, thereby avoiding the generation of noise. Specifically, the force value of the elastic member 60 can be obtained by adjusting the wire diameter or shape to obtain the required force value, and the elastic member 60 is a metal elastic wire.

[0145] Embodiment 5

[0146] Reference Figure 1 , a folding drive device, based on the first embodiment or the second embodiment or the third embodiment, the shell 3 includes a lower shell 32 and an upper cover 31; the upper cover 31 is snap-connected with one end of the lower shell 32.

[0147] In summary, the folding drive device provided by the present invention forms a gap between the base and the rotating seat during the movement of the rearview mirror through the cooperation of an elastic member, a gear assembly and a gear gasket, thereby reducing the transmission resistance, and providing a boss, a limit platform, a guide groove, a limit groove and a limit assembly, so that when the rearview mirror is folded or unfolded into place, there is no gap between the base and the rotating seat, thereby preventing wind and sand from entering and reducing wind noise during the operation of the vehicle.

[0148] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A noise-reducing folding drive device, comprising a housing for drivingly connecting to a mirror substrate and a base connected to the housing, characterized in that: It also includes a driving mechanism, a gear assembly, a transmission assembly and a rotating seat for fixedly connecting with the mirror base; The fixed end of the driving mechanism is installed in an assembly chamber formed by the first end of the housing and the first end of the base; The transmission assembly and the gear assembly are both installed between the housing and the base; The transmission assembly and the gear assembly are sequentially arranged on the second end of the base from bottom to top, and the base can rotate relative to the gear assembly; The transmission assembly is coaxially arranged with the gear assembly and can be transmission-connected with the gear assembly; The gear assembly is drivingly connected to the output end of the driving mechanism; The transmission assembly is coaxially arranged with the rotating seat and is always relatively statically connected; A limiting groove is provided on one side of the base facing the rotating seat; An elastic member and a limiting assembly for limiting the limiting groove are provided on one side of the rotating seat facing the base, and the elastic member can create a gap between the rotating seat and the base; When the base is limited and the gear assembly continues to rotate in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat fits with the base; A lifting groove for assembling the elastic member is formed in the circumferential direction on one side of the rotating seat facing the shell; The two ends of the elastic member are respectively pressed against the two sides of the lifting groove in the circumferential direction, and the middle part of the elastic member is arched, and the highest point in the middle part of the elastic member is higher than the top of the lifting groove in the axial direction; The outer edge of the middle part of the elastic member has a limiting portion, and the limiting portion can be embedded in the groove on the outer circumference of the rotating seat in the axial direction.

2. A noise-reducing folding drive device according to claim 1, characterized in that: The transmission assembly includes a convex rib and a hollow gear washer; The gear gasket is sleeved on the outer side of one end of the rotating seat; The convex rib is arranged on the inner circumference of the gear gasket and is used for engaging with the clamping groove on the outer surface of the rotating seat.

3. A noise-reducing folding drive device according to claim 2, characterized in that: The gear gasket is provided with a guide groove in the circumferential direction; A boss matching the guide groove is arranged on one side of the gear assembly facing the gear gasket. When the boss is embedded in the guide groove, the gear gasket can rotate with the gear assembly.

4. A noise-reducing folding drive device according to claim 3, characterized in that: The guide groove has a first climbing slope and a second climbing slope at both ends in the circumferential direction respectively; When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the boss can move up along the first climbing slope or the second climbing slope to enable the gear gasket to press the elastic member up and down in the axial direction.

5. The noise-reducing folding drive device according to claim 1, characterized in that: One end of the limiting groove has a third climbing slope, and the other end of the limiting groove has a stop surface for limiting the limiting assembly; There are a plurality of limit grooves, and the plurality of limit grooves are evenly distributed in the circumferential direction and arranged in sequence.

6. The noise-reducing folding drive device according to claim 1, characterized in that: The limiting assembly includes a first spring and a stop pin; A blind hole is formed on one side of the rotating seat facing the base; The first spring and one end of the stop pin are sequentially installed in the blind hole along the axial direction, and the first spring is coaxially arranged with the stop pin.

7. The noise-reducing folding drive device according to claim 1, characterized in that: Also includes a rotating shaft and a second spring; The second spring is sleeved on the outer side of the rotating shaft; A limit clamping platform is arranged on the outer side of one end of the rotating shaft away from the base; The second spring is located between the limit clamp and the gear assembly, and is used to push the gear assembly to reset; The rotating shaft is inserted from a side of the housing away from the base and passes through the gear assembly and the transmission assembly in sequence to be relatively statically connected to the rotating seat.

8. The noise-reducing folding drive device according to claim 1, characterized in that: The drive mechanism includes a worm assembly; The two ends of the worm assembly in the axial direction are respectively provided with shaft sleeves; The base is provided with a worm groove for providing a rotation space for the worm assembly; A U-shaped groove is respectively provided at both ends of the worm groove; Both ends of the worm assembly are embedded in the U-shaped groove; An elastic member is arranged in the U-shaped groove, and the elastic member can be pressed against the shaft sleeve.

9. The noise-reducing folding drive device according to claim 3, characterized in that: The guide groove has a first climbing slope and a second climbing slope at both ends in the circumferential direction respectively; A limiting platform is provided on a side of the gear assembly facing the gear gasket, and the boss is provided on a side of the limiting platform facing the gear gasket; When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the boss can move up along the first climbing slope or the second climbing slope, and one end of the limiting platform presses against the side of the gear gasket facing the housing.

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