A foldable drive device with noise reduction

Abstract

The application discloses a foldable driving device capable of reducing noise, which comprises a driving mechanism, a gear assembly, a transmission assembly and a rotating seat used for fixed connection with a mirror base; the transmission assembly is coaxially arranged with the gear assembly and can be transmissionally connected with the gear assembly; the gear assembly is transmissionally connected with the output end of the driving mechanism; the transmission assembly is coaxially arranged with the rotating seat and is always connected with the rotating seat in a relative static state; a limiting groove is formed in the side of the base facing the rotating seat; the side of the rotating seat facing the base is provided with an elastic member and a limiting assembly used for limiting the limiting groove, and the elastic member can generate a gap between the rotating seat and the base; when the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly is axially pressed against the transmission assembly, so that the rotating seat is attached to the base. In the application, the transmission resistance between the base and the rotating seat during the folding process of the rearview mirror can be reduced, and meanwhile, the wind sand can be prevented from entering and the wind noise can be reduced after the rearview mirror is folded or unfolded to the position.

Description

[0001] This application is a divisional application of the parent application with the application date of February 9, 2021, the application number of 2021101812196, and the name of a folding drive device. TECHNICAL FIELD

[0002] The present application relates to the field of automobile accessories, in particular to a folding drive device with noise reduction. BACKGROUND

[0003] The rearview mirror folding drive device is usually installed between the mirror base plate (assembled rearview mirror) and the mirror base (connected with the door) to drive the electric folding of the rearview mirror. The existing rearview mirror folding drive device usually only has a rotating function without lifting function, or slowly lifting in a spiral manner while rotating.

[0004] In the early development of the automotive industry, the electric rearview mirror assembly with only rotating function often needs to reserve a rotating gap between the mirror base plate and the mirror base during the design of the rearview mirror in order to reduce the frictional resistance between the mirror base plate and the mirror base during electric folding. When there is a rotating gap between the mirror base plate and the mirror base, the wind noise during driving is large. In addition, the presence of the rotating gap between the mirror base plate and the mirror base easily leads to the entry of wind and sand, thereby increasing the relative rotation resistance of the mirror base plate and the mirror base, increasing the current during motor operation, and causing the rearview mirror to fail to fold in place, or even the failure of the rearview mirror folding.

[0005] In recent years, with the development of the automotive industry, the electric rearview mirror assembly with rotating function and slowly lifting mirror base plate has gradually appeared, which can generate a relatively small rotating gap between the mirror base plate and the mirror base or increase the elastic windproof rubber strip to block the wind and sand during the folding of the rearview mirror. Under normal conditions, this method can solve the problems of large wind noise or wind and sand entering. However, due to the following defects of the slowly lifting mechanism during rotation, the folding starts to be slow or fails, and the rubber wears out after a certain number of folding times within a period of time, thereby causing wind noise problems. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a folding drive device that ensures that the folding part of the rearview mirror has no gap under driving conditions, and reduces the rotating resistance when the rearview mirror needs to be folded.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is:

[0008] The utility model provides a folding drive device, which comprises a housing for transmission connection with a mirror base plate, a base connected with the housing, a drive mechanism, a gear assembly, a transmission assembly and a rotating seat for fixed connection with the mirror base.

[0009] The fixed end of the drive mechanism is arranged 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 arranged between the housing and the base.

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

[0012] The transmission assembly and the gear assembly are coaxially arranged and can be transmission connected with the gear assembly.

[0013] The gear assembly is transmission connected with the output end of the drive mechanism.

[0014] The transmission assembly and the rotating seat are coaxially arranged and are always connected relative to the static state.

[0015] The side of the base facing the rotating seat is provided with a limiting groove.

[0016] The side of the rotating seat facing the base is provided with an elastic member and a limiting assembly for limiting the limiting groove, and the elastic member can generate 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 is pressed against the transmission assembly in the axial direction, so that the rotating seat is attached to the base.

[0018] The beneficial effects of the present application are that the rotating base is fixed on the mirror base, the transmission assembly is fixed through the rotating base, the gear assembly is in transmission connection with the transmission assembly, the shell and the base can be relatively moved with the gear assembly under the driving of the driving mechanism, and the folding and unfolding of the rearview mirror is realized. Due to the arrangement of the elastic member, there is always a gap between the base and the rotating base during the relative movement of the base and the rotating base, and the rotating resistance is reduced. When the base is limited by the limiting assembly, the gear assembly continuously receives the driving force in the opposite direction, so that the gear assembly moves in the axial and circumferential directions under the driving of the driving mechanism, and then is pressed on the transmission assembly, the transmission assembly applies pressure on the base in the axial direction, and after the rotating base and the base are attached, the rearview mirror will be in a static state. The present application always has a gap between the base and the rotating base during the folding and unfolding of the rearview mirror through the action of the elastic member, reduces the friction resistance, and can make the base and the rotating base closely contact after rotating to the position, overcomes the defects that sand is easy to enter between the mirror base plate and the mirror base and wind noise is easy to produce, prolongs the service life of the rearview mirror driving device, and ensures the effectiveness of the folding and unfolding of the rearview mirror. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an explosion of a folding driving device in the present application Figure 1 ;

[0020] Figure 2 It is an explosion of a folding driving device in the present application Figure 2 ;

[0021] Figure 3 It is a partial explosion of a folding driving device in the present application Figure 1 ;

[0022] Figure 4 It is an enlarged view of part A in the present application Figure 3 ;

[0023] Figure 5 It is an enlarged view of part B in the present application Figure 3 ;

[0024] Figure 6 It is a partial explosion of a folding driving device in the present application Figure 2 ;

[0025] Figure 7 It is an enlarged view of part C in the present application Figure 6 ;

[0026] Figure 8 It is a sectional view of the base and the worm assembly in the present application

[0027] Figure 9 It is a sectional view of a folding driving device in the present application Figure 1 ;

[0028] Figure 10 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 1 ;

[0029] Figure 11 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 10 ;

[0030] Figure 12 A structural schematic diagram of a mirror base and a mirror base plate in the present application

[0031] Figure 13 A partial explosion of a folding driving device in the present application Figure 3 ;

[0032] Figure 14 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 13 ;

[0033] Figure 15 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 1 ;

[0034] Figure 16 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 2 ;

[0035] Figure 17 A sectional view of a folding and stationary state of a folding driving device in the present application Figure 16 ;

[0036] Explanation of reference numerals:

[0037] 1, mirror base plate; 11, stop block

[0038] 2, mirror base; 21, limiting protrusion

[0039] 3, shell; 31, upper cover; 32, lower shell

[0040] 4, base; 40, assembly chamber; 41, clamping 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, limiting clamping table; 621, first step surface; 622, second step surface; 63, wear-resistant gasket

[0043] 7, transmission assembly; 71, convex rib; 72, gear gasket; 721, guide groove; 7211, first climbing slope; 7212, second climbing slope;

[0044] 8, rotating seat; 81, clamping groove; 82, lifting groove; 83, blind hole; 84, recess;

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

[0046] 10, limiting assembly; 101, first spring; 102, blocking pin;

[0047] 20, rotating shaft; 201, limiting clamping table;

[0048] 30, second spring; 50, rearview mirror; 60, elastic member. DETAILED DESCRIPTION

[0049] In order to explain the technical content, the purpose and the effect of the present application in detail, the following will be described in combination with the embodiments and the accompanying drawings.

[0050] Please refer to Figures 1-17 A folding driving device, comprising a housing for transmission connection with a mirror base plate and a base connected with the housing, further 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 arranged in an assembly chamber composed of the first end of the housing and the first end of the base;

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

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

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

[0055] The gear assembly is transmission connected with the output end of the driving mechanism;

[0056] The transmission assembly and the rotating seat are coaxially arranged and are always connected relatively stationary;

[0057] The side of the base facing the rotating seat is provided with a limiting groove;

[0058] The side of the rotating seat facing the base is provided with an elastic member and a limiting assembly for limiting the limiting groove, and the elastic member can generate a gap between the rotating seat and the base;

[0059] When the base is limited and the gear assembly continues to rotate in the limited direction, the gear assembly is pressed against the transmission assembly in the axial direction, so that the rotating seat is attached to the base.

[0060] The working principle of the present application is that:

[0061] When the rearview mirror is in motion, the base and the gear assembly can move relatively, the pressure of the gear assembly on the rotating seat in the axial direction is removed, and a gap can be generated between the rotating seat and the base under the pushing of the elastic member, so as to reduce the transmission resistance;

[0062] When the rearview mirror is folded or unfolded to the position, that is, the base is limited and the gear assembly is still subjected to the axial driving force, the gear assembly will be lifted to press the rotating seat, so that the rotating seat is attached to the base, the gap is closed, and wind noise is avoided while sand is prevented from entering.

[0063] From the above description, the beneficial effects of the present application are that: the rotating seat is fixed on the mirror base, the transmission assembly is fixed through the rotating seat, the gear assembly is in transmission connection with the transmission assembly, the shell and the base can move relatively with the gear assembly under the driving of the driving mechanism, and the folding and unfolding of the rearview mirror are realized. 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, so as to reduce the rotating resistance. When the base is limited by the limiting assembly, the gear assembly is continuously subjected to the driving force in the opposite direction, so that the gear assembly moves in the axial and circumferential directions under the driving of the driving mechanism, and then is pressed against the transmission assembly. After the rotating seat is attached to the base, the rearview mirror will be in a stationary state. Through the action of the elastic member during the folding and unfolding of the rearview mirror, the present application always has a gap between the base and the rotating seat, so as to reduce the friction resistance, and the base and the rotating seat can be in close contact after being rotated to the position, so as to overcome the defects that sand is easy to enter between the mirror base plate and the mirror base and wind noise is easy to occur, prolong the service life of the rearview mirror driving device, and ensure the effectiveness of the folding and unfolding of the rearview mirror.

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

[0065] The gear washer is sleeved outside one end of the rotating seat;

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

[0067] From the above description, the convex rib is arranged to connect the gear pad and the rotating seat relatively stationary, and since the gear assembly can be drivingly connected with the gear pad, when the driving mechanism is driven and the base is not limited, the base and the shell can be relatively rotated with the gear assembly, the gear pad and the rotating seat, to realize the folding and unfolding of the rearview mirror.

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

[0069] The side of the gear assembly towards the gear pad is provided with a boss matched with the guide groove, and when the boss is embedded in the guide groove, the gear pad can rotate with the gear assembly.

[0070] From the above description, the boss is arranged to improve the transmission reliability between the gear pad and the transmission assembly.

[0071] Further, 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 upwards along the first climbing slope or the second climbing slope, to press the elastic member in the axial direction.

[0073] From the above description, the first and second climbing slopes are arranged to smoothly climb when the gear assembly is driven in different directions, to apply pressure to the rotating seat and press the base on the rotating seat, to avoid the gap during the running or static process of the automobile, to ensure that there is no wind noise, to avoid wind and sand from entering, and to reduce the transmission resistance.

[0074] Further, the side of the rotating seat towards the shell is provided with a lifting groove in the circumferential direction for assembling the elastic member;

[0075] The two ends of the elastic member are respectively pressed on the two sides of the lifting groove in the circumferential direction, to make the middle part of the elastic member arch, and the highest point of 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, the lifting groove is arranged 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 the gap is generated during the rotation of the base, and to reduce the rotation 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] The plurality of limiting grooves are evenly distributed in the circumferential direction and are sequentially arranged.

[0079] As can be seen from the above description, one of the rotation directions of the base is limited in the circumferential direction, the other rotation direction is provided with a third climbing slope, the limiting assembly can be inserted into the adjacent limiting groove, the base rotates smoothly, and the rearview mirror can be rotated to the position, when the base rotates towards the side where the third climbing slope is located, the base is limited by the limiting structure between the mirror base plate and the mirror base, and the same effect of limiting the base and making the gear assembly climb is achieved, and the base is pressed on the rotating seat to avoid the entry of sand and the generation of wind noise.

[0080] Further, the limiting assembly comprises a first spring and a blocking pin;

[0081] The rotating seat is provided with a blind hole on the side facing the base;

[0082] The first spring and one end of the blocking pin are sequentially arranged in the blind hole in the axial direction, and the first spring and the blocking pin are coaxially arranged.

[0083] As can be seen from the above description, since the blocking pin should always move in the limiting groove during the operation of the base, the first spring and the blocking pin are arranged to push the blocking pin to move in the axial direction, so that the blocking pin can limit the base and improve the reliability of the movement of the base.

[0084] Further, it further comprises a rotating shaft and a second spring;

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

[0086] The outer side of the end of the rotating shaft away from the base is provided with a limiting clamping table;

[0087] The second spring is located between the limiting clamping table and the gear assembly, and is used to push the gear assembly to reset;

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

[0089] As can be seen from the above description, the second spring is arranged to apply pressure to the gear assembly in the axial direction, so that when the reverse force acting on the base in the circumferential direction is removed, the driving mechanism applies a reverse pushing force to the gear assembly, and under the pushing of the second spring, the gear assembly is reset, so that a gap is generated between the base and the rotating seat during the rotation of the rearview mirror, and the transmission resistance is reduced.

[0090] Further, the driving mechanism comprises a worm assembly;

[0091] The shaft sleeve is arranged at both ends of the worm assembly in the axial direction.

[0092] The worm groove is arranged on the base for providing a rotating space for the worm assembly.

[0093] The U-shaped groove is arranged at both ends of the worm groove.

[0094] The both ends of the worm assembly are embedded in the U-shaped groove.

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

[0096] As can be seen from the above description, the shaft sleeve is arranged at both ends of the worm assembly, when the motor of the driving mechanism drives the worm assembly to rotate forward or reversely, there is an instantaneous axial driving force, which drives the worm assembly to move in the axial direction, the elastic member is arranged to provide a reverse force for the worm assembly in the axial direction, so as to avoid the collision between the worm assembly and the U-shaped groove 4, and further avoid the generation of noise.

[0097] Further, the guiding groove has a first climbing slope and a second climbing slope at both ends in the circumferential direction.

[0098] The limiting table is arranged on the side of the gear assembly facing the gear gasket, and the convex table is arranged on the side of the limiting table facing the gear gasket.

[0099] When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the convex table can move on the first climbing slope or the second climbing slope, and one end of the limiting table is pressed on the side of the gear gasket facing the shell.

[0100] As can be seen from the above description, the first climbing slope and the second climbing slope are arranged, which can smoothly climb when the gear assembly is driven in different directions, and can exert pressure on the rotating seat, so that the base is pressed on the rotating seat, to avoid the appearance of the gap during the running or static process of the automobile, to ensure that there is no wind noise, and to avoid the entry of sand and dust, and to reduce the transmission resistance.

[0101] The present application is suitable for various folding scenes, especially for use in electric rearview mirrors, and in the present application, each embodiment is described by taking an electric rearview mirror as an example.

[0102] Embodiment one

[0103] Reference Figures 1-17A folding driving device, comprising a housing 3 for transmission connection with a mirror base plate 1, a base 4 connected with the housing 3, a driving mechanism 5, a gear assembly 6, a transmission assembly 7 and a rotating seat 8 for fixed connection with a mirror base 2; a fixed end of the driving mechanism 5 is arranged in an assembly chamber 40 formed by a first end of the housing 3 and a first end of the base 4; the transmission assembly 7 and the gear assembly 6 are both arranged between the housing 3 and the base 4; the transmission assembly 7 and the gear assembly 6 are sequentially arranged from bottom to top on a second end of the base 4, and the base 4 can rotate relative to the gear assembly 6; the transmission assembly 7 and the gear assembly 6 are coaxially arranged and can be in transmission connection with the gear assembly 6; the gear assembly 6 is in transmission connection with an output end of the driving mechanism 5; the transmission assembly 7 and the rotating seat 8 are coaxially arranged and are always connected relative to static; a limiting groove 42 is formed on a side of the base 4 facing the rotating seat 8; a spring 9 and a limiting assembly 10 for limiting the limiting groove 42 are arranged on a side of the rotating seat 8 facing the base 4, and the spring 9 can cause a gap between the rotating seat 8 and the base 4; when the base 4 is limited and the gear assembly 6 continuously rotates in the limited direction, the gear assembly 6 axially presses the transmission assembly 7, so that the rotating seat 8 is attached to the base 4. Specifically, the housing 3 and the base 4 are detachably connected; the base 4 is fixed on the rotating seat 8 through a clamping ring 41.

[0104] In the embodiment, during the unfolding process of the rearview mirror 50, the base 4 is limited by the limiting assembly 10 after being rotated in place, at this time, the gear assembly 6 climbs and then presses the transmission assembly 7 and the base 4, so that the base 4 is pressed on the rotating seat 8, and the gap is eliminated; during the folding process of the rearview mirror 50, the rearview mirror 50 has a limiting structure between the mirror base plate 1 and the mirror base 2 after the base 4 is rotated in place, the limiting structure limits the housing 3 by limiting the mirror base plate 1, so that the gear assembly 6 climbs in the opposite direction, and the same, the gear assembly 6 climbs and then presses the transmission assembly 7 and the base 4, so that the base 4 is pressed on the rotating seat 8, and the gap is eliminated.

[0105] Specifically, referring to Figure 12 , the limiting structure comprises a stop block 11 arranged on the mirror base plate 1 and a limiting protrusion 21 arranged on the mirror base 2, when the rearview mirror 50 is folded in place, the base 4 is also rotated in place, at this time, the stop block 11 is pressed on one side of the limiting protrusion 21 in the circumferential direction, so that the mirror base plate 1 cannot continue to be folded.

[0106] Embodiment two

[0107] It is worth noting that in the 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 in the perspective angle.

[0108] Referring to Figures 1-11A folding drive device, based on Embodiment 1, includes a transmission component 7 comprising a rib 71 and a hollow gear washer 72; the gear washer 72 is sleeved on the outer side of one end of the rotating seat 8; the rib 71 is disposed on the inner circumference of the gear washer 72 for engaging with a groove 81 on the outer surface of the rotating seat 8. Preferably, six ribs 71 are provided.

[0109] Reference Figures 1-11 The gear washer 72 has a guide groove 721 in the circumferential direction; the gear assembly 6 has a boss 61 on the side facing the gear washer 72 that matches the guide groove 721. 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 can be provided. Preferably, three bosses 61 and three guide grooves 721 are provided.

[0110] Reference Figures 1-11 The guide groove 721 has a first climbing slope 7211 and a second climbing slope 7212 at its two ends in the circumferential direction. A limiting platform 62 is provided on the side of the gear assembly 6 facing the gear pad 72, and a boss 61 is provided on the side of the limiting platform 62 facing the gear pad 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 upward along the first climbing slope 7211 or the second climbing slope 7212, and one end of the limiting platform 62 presses against the side of the gear pad 72 facing the housing 3. Specifically, the limiting platform 62 has a first step surface 621 and a second step surface 622. The first step surface 621 and the second step surface 622 are respectively connected to the side of the gear pad 72 facing the base 4 through a fourth climbing slope 623 and a fifth climbing slope 624. The boss 61 has a sixth climbing slope 611 and a seventh climbing slope 612 on its two sides in the circumferential direction. Preferably, the limiting platform 62 is provided with three.

[0111] Reference Figures 1-11 The rotating seat 8 has a lifting groove 82 circumferentially formed on the side facing the housing 3 for assembling the elastic member 9. The two ends of the elastic member 9 abut against the two sides of the lifting groove 82 circumferentially, causing the middle part of the elastic member 9 to arch, and the highest point of the middle part of the elastic member 9 is axially higher than the top of the lifting groove 82. Optionally, one or more lifting grooves 82 and elastic members 9 can be provided; preferably, three lifting grooves 82 and three elastic members 9 are provided.

[0112] Reference Figures 1-11 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 component 10; multiple limiting grooves 42 are provided, and the multiple limiting grooves 42 are evenly distributed in the circumferential direction and arranged sequentially. Preferably, three limiting grooves 42 are provided.

[0113] Reference Figures 1-11 The limiting component 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 and the stop pin 102 are coaxially arranged. Optionally, one or more limiting components 10 can be provided, preferably, three limiting components 10 are provided.

[0114] Reference Figures 1-11 It also includes a rotating shaft 20 and a second spring 30; the second spring 30 is sleeved on the outside of the rotating shaft 20; a limiting plate 201 is provided 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 limiting plate 201 and the gear assembly 6, and is used to reset the pushing gear assembly 6; the rotating shaft 20 is inserted from the side of the housing 3 away from the base 4 and passes through the gear assembly 6 and the transmission assembly 7 in sequence, and is relatively stationary with respect to the rotating seat 8. Preferably, both the first spring 101 and the second spring 30 are compression springs. Specifically, a wear-resistant gasket 63 is provided between the second spring 30 and the gear assembly 6.

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

[0116] Reference Figures 1-11 The worm gear assembly 52 includes a worm body 521 and a transmission gear 522; the transmission gear 522 meshes with the output end of the drive motor 51; the transmission gear 522 forms a worm gear transmission structure with the gear assembly 6 through the worm body 521, and is used to transmit power to the gear assembly 6.

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

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

[0119] Reference Figure 10 When the rearview mirror 50 is in the folding process, the base 4 rotates counterclockwise relative to the gear assembly 6, the limiting platform 62 and the boss 61 slide into the guide groove 721 and are locked together, the gear assembly 6 and the gear washer 72 remain stationary, at this time the stop pin 102 moves relative to the guide groove 721, and the stop pin 102 enters the next guide groove 721 along the third climbing slope 421;

[0120] During this process, the arched part in the middle of the elastic sheet supports the base 4, so that the base 4 and the rotating seat 8 always have a gap a, the distance of gap a is 0.4mm to 1.0mm;

[0121] Until the mirror base plate 1 is rotated into place and the mirror base plate 1 is limited by the mirror base 2, the housing 3 and the base 4 are limited. The drive motor 51 continuously applies a force to the gear assembly 6 in the clockwise direction, causing the fifth climbing slope 624 and the seventh climbing slope 612 to move upward along the second climbing slope 7212 in sequence, and causing the second step surface 622 to press against the side of the gear pad 72 facing the gear assembly 6. At this time, the base 4 applies pressure to the elastic member 9, and the base 4 and the rotating seat 8 fit tightly together, eliminating the gap a. There is a gap b between the gear assembly 6 and the gear pad 72, and the distance of gap b is equal to the distance of gap a.

[0122] Reference Figure 11 and Figure 1 When the rearview mirror 50 is unfolding, the base 4 rotates clockwise relative to the gear assembly 6, the seventh climbing ramp 612 moves down along the second climbing ramp 7212, the limiting platform 62 and the boss 61 slide into the guide groove 721 and are locked together, the gear assembly 6 and the gear washer 72 remain stationary, at this time the stop pin 102 moves relative to the guide groove 721, and the stop surface 422 gradually approaches the stop pin 102;

[0123] During this process, the arched part in the middle of the elastic element 9 supports the base 4, so that there is always a gap between the base 4 and the rotating seat 8.

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

[0125] Example 3

[0126] Reference Figure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 1 A folding drive device, based on Embodiment 1, includes a transmission component 7 comprising a rib 71 and a hollow gear washer 72; the gear washer 72 is sleeved on the outer side of one end of the rotating seat 8; the rib 71 is disposed on the inner circumference of the gear washer 72 for engaging with a groove 81 on the outer surface of the rotating seat 8. Preferably, six ribs 71 are provided.

[0127] ReferenceFigure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 7 The gear washer 72 has a guide groove 721 in the circumferential direction; the gear assembly 6 has a boss 61 on the side facing the gear washer 72 that matches the guide groove 721. 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 can be provided. Preferably, three bosses 61 and three guide grooves 721 are provided.

[0128] Reference Figure 1 The guide groove 721 has a first climbing slope 7211 and a second climbing slope 7212 at its two ends in the circumferential direction. When the limiting component 10 is limited and the gear assembly 6 continues to rotate in the limited direction, the boss 61 can move upward along the first climbing slope 7211 or the second climbing slope 7212 to make the gear washer 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 on its two sides in the circumferential direction.

[0129] Reference Figure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 1 The rotating seat 8 has a lifting groove 82 circumferentially formed on the side facing the housing 3 for assembling the elastic member 9. The two ends of the elastic member 9 abut against the two sides of the lifting groove 82 circumferentially, causing the middle part of the elastic member 9 to arch, and the highest point of the middle part of the elastic member 9 is axially higher than the top of the lifting groove 82. Optionally, one or more lifting grooves 82 and elastic members 9 can be provided; preferably, three lifting grooves 82 and three elastic members 9 are provided.

[0130] Reference Figure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 1 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 component 10; multiple limiting grooves 42 are provided, and the multiple limiting grooves 42 are evenly distributed in the circumferential direction and arranged sequentially. Preferably, three limiting grooves 42 are provided.

[0131] Reference Figure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 1The limiting component 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 and the stop pin 102 are coaxially arranged. Optionally, one or more limiting components 10 can be provided, preferably, three limiting components 10 are provided.

[0132] Reference Figure 2 , Figure 6 , Figure 7 , Figures 12-17 and Figure 1 It also includes a rotating shaft 20 and a second spring 30; the second spring 30 is sleeved on the outside of the rotating shaft 20; a limiting plate 201 is provided 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 limiting plate 201 and the gear assembly 6, and is used to reset the pushing gear assembly 6; the rotating shaft 20 is inserted from the side of the housing 3 away from the base 4 and passes through the gear assembly 6 and the transmission assembly 7 in sequence, and is relatively stationary with respect to the rotating seat 8. Preferably, both the first spring 101 and the second spring 30 are compression springs. Specifically, a wear-resistant gasket 63 is provided between the second spring 30 and the gear assembly 6.

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

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

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

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

[0137] Reference Figure 2 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 locked together, the gear assembly 6 and the gear washer 72 remain stationary, at this time the stop pin 102 moves relative to the guide groove 721, and the stop pin 102 enters the next guide groove 721 along the third climbing slope 421.

[0138] During this process, the arched part in the middle of the elastic element 9 supports the base 4, so that the base 4 and the rotating seat 8 always have a gap a, the distance of gap a is 0.4mm to 1.0mm;

[0139] Until the mirror base plate 1 is rotated into place and the mirror base plate 1 is limited by the mirror base 2, the housing 3 and the base 4 are limited. The drive motor 51 continuously applies force to the gear assembly 6 in the clockwise direction, causing the seventh climbing slope 612 to move up along the second climbing slope 7212. At this time, the base 4 applies pressure to the elastic element 9, and the base 4 and the rotating seat 8 fit tightly together, eliminating the gap.

[0140] Reference Figure 6 and Figure 7 When the rearview mirror 50 is unfolding, the base 4 rotates clockwise relative to the gear assembly 6, the seventh climbing ramp 612 moves down along the second climbing ramp 7212, the boss 61 slides into the guide groove 721 and is locked together, the gear assembly 6 and the gear washer 72 remain stationary, at this time the stop pin 102 moves relative to the guide groove 721, and the stop surface 422 gradually approaches the stop pin 102;

[0141] During this process, the arched part in the middle of the elastic element 9 supports the base 4, so that there is always a gap between the base 4 and the rotating seat 8.

[0142] Until the stop surface 422 is in contact 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 element 9, and the base 4 and the rotating seat 8 are tightly in contact, eliminating the gap.

[0143] Example 4

[0144] Reference Figures 12-17 and Figure 1A folding drive device, based on Embodiment 1, Embodiment 2, or Embodiment 3, has bushings 53 fitted at both ends of the worm gear assembly 52 in the axial direction. A worm groove is provided on the base 4 to provide rotational space for the worm gear assembly 52. ​​A U-shaped groove 43 is provided at each end of the worm groove, and an elastic element 60 is installed within the U-shaped groove 43. The elastic element 60 can press against the bushings 53. Since there is an instantaneous axial driving force when the drive motor 51 drives the worm gear assembly 52 to rotate forward or reverse, causing the worm gear assembly 52 to move axially, the elastic element 60 provides a reverse force to the worm gear assembly 52 in the axial direction, preventing the worm gear assembly 52 from colliding with the U-shaped groove 43, thereby avoiding noise generation. Specifically, the force value of the elastic element 60 can be obtained by adjusting the wire diameter or shape; the elastic element 60 is a metal elastic wire.

[0145] Example 5

[0146] Reference Figure 2 Figure 6 Figure 7 Figures 12-17 Figure 1 Figure 2 Figure 6 Figure 7 Figures 12-17 Figure 15 Figure 16 Figure 17 Figure 6 Figure 8 Figure 1 A folding drive device, based on Embodiment 1, Embodiment 2, or Embodiment 3, wherein the housing 3 includes a lower housing 32 and an upper cover 31; the upper cover 31 is snapped into one end of the lower housing 32.

[0147] In summary, the folding drive device provided by the present invention, through the cooperation of elastic elements, gear assemblies and gear washers, achieves the formation of a gap between the base and the rotating seat during the movement of the rearview mirror, thereby reducing transmission resistance. Furthermore, by setting up a boss, a limiting platform, a guide groove, a limiting groove and a limiting assembly, it ensures that when the rearview mirror is folded or unfolded into place, there is no gap between the base and the rotating seat, preventing sand and dust from entering and reducing wind noise during vehicle operation.

[0148] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A foldable drive apparatus capable of noise reduction, comprising a housing for driving connection with a mirror substrate and a base connected with the housing, characterized in that, The driving mechanism, the gear assembly, the transmission assembly and the rotating seat for fixed connection with the mirror base are further included; The fixed end of the driving mechanism is arranged in an assembly chamber formed by the first end of the shell and the first end of the base; The transmission assembly and the gear assembly are arranged between the shell 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 and the gear assembly are coaxially arranged and can be drivingly connected with the gear assembly; The gear assembly is drivingly connected with the output end of the driving mechanism; The transmission assembly is coaxially arranged with the rotating seat and is always connected relative to the rotating seat. A limiting groove is formed on the side of the base facing the rotating seat; The rotating seat is provided with an elastic member and a limiting assembly for limiting the limiting groove on the side of the rotating seat facing the base, and the elastic member can generate a gap between the rotating seat and the base; When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly is pressed against the transmission assembly in the axial direction, so that the rotating seat is attached to the base; The side of the rotating seat facing the shell is circumferentially provided with a lifting groove for assembling the elastic member; 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 of 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 part which can be embedded in the groove on the outer circumference of the rotating seat in the axial direction.

2. A noise-reducible folding drive apparatus according to claim 1, wherein The transmission assembly includes a convex rib and a hollow gear washer; The gear washer is sleeved on the outside of one end of the rotating seat; The convex rib is arranged on the inner circumference of the gear washer and is used for clamping with the clamping groove on the outer surface of the rotating seat.

3. A noise-reducible folding drive as defined in claim 2, wherein The gear washer is circumferentially provided with a guide groove; The side of the gear assembly facing the gear washer is provided with a boss matched with the guide groove, and when the boss is embedded in the guide groove, the gear washer can rotate with the gear assembly.

4. A noise-reducible folding drive as defined in claim 3, wherein The guide groove has a first climbing slope and a second climbing slope at the two ends in the circumferential direction respectively; When the limiting assembly is limited and the gear assembly continuously rotates in the limited direction, the boss can move upward along the first climbing slope or the second climbing slope, so that the gear washer presses the elastic member downward in the axial direction.

5. The noise reducing folding drive of claim 1, wherein, 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; The limiting groove is provided with a plurality of limiting grooves which are uniformly distributed and sequentially arranged in the circumferential direction.

6. A noise-reducible folding drive apparatus according to claim 1, wherein The limiting assembly includes a first spring and a blocking pin; The side of the rotating seat facing the base is provided with a blind hole; The first spring and one end of the blocking pin are sequentially arranged in the blind hole in the axial direction, and the first spring and the blocking pin are coaxially arranged.

7. A noise-reducible folding drive apparatus according to claim 1, wherein A rotating shaft and a second spring are further included; The second spring is sleeved on the outside of the rotating shaft; The rotating shaft is provided with a limiting clamping table on the outside of the end away from the base; The second spring is located between the limiting block and the gear assembly, and is used for resetting the gear assembly; The rotating shaft is inserted from the side of the shell away from the base, and is sequentially connected to the rotating seat in a stationary manner through the gear assembly and the transmission assembly.

8. The noise reducing folding drive of claim 1, wherein, The driving mechanism comprises a worm assembly; The worm assembly is sleeved with a shaft sleeve at both ends in the axial direction; The base is provided with a worm groove for providing a rotating space for the worm assembly; Both ends of the worm groove are respectively provided with a U-shaped groove; Both ends of the worm assembly are embedded in the U-shaped groove; The U-shaped groove is provided with an elastic member, which can abut against the shaft sleeve.

9. A noise-reducible folding drive apparatus according to claim 3, wherein Both ends of the guide groove in the circumferential direction are respectively provided with a first climbing slope and a second climbing slope; The gear assembly is provided with a limiting block on the side facing the gear gasket, and the convex block is arranged on the side of the limiting block facing the gear gasket; When the limiting assembly is limited and the gear assembly continues to rotate in the limited direction, the convex block can move upwards along the first climbing slope or the second climbing slope, and one end of the limiting block abuts against the side of the gear gasket facing the shell.

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