Rearview mirror clutch device and rearview mirror

Abstract

This utility model discloses a rearview mirror clutch device and a rearview mirror. The rearview mirror clutch device includes: a mounting base, a clutch assembly, and a transmission assembly. A floating plate is movably connected to the mounting base, and a screw is disposed between the floating plate and the mounting base, with one end of the screw hinged to the floating plate. The clutch assembly includes an elastic element and a clutch element. The clutch element is threadedly connected to the other end of the screw, and the elastic element is sleeved on the screw. The transmission assembly is disposed on the mounting base and sleeved around the clutch element. The elastic element abuts against the clutch element to ensure that the clutch element and the transmission assembly are in contact. The transmission assembly is used to drive the clutch element to rotate and drive the screw to move up and down. When the screw moves to its limit position, the screw stops and restricts the rotation of the clutch element. At this time, the transmission assembly still maintains the driving tendency, while the clutch element remains stationary, thereby producing the effect of rotational engagement and disengagement between the transmission assembly and the clutch element, thus avoiding the problem of adjustment failure.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a rearview mirror clutch device, and a rearview mirror having a rearview mirror clutch device. Background Technology

[0002] As a crucial device for drivers to observe the situation behind and to the sides of the vehicle, the rearview mirror plays a vital role in driving safety. It expands the driver's field of vision, effectively reduces blind spots, and lowers the risk of traffic accidents caused by blind spots. In related technologies, the adjustment mechanism installed inside the rearview mirror allows for the adjustment of the mirror's angle and visual range, thus providing the driver with optimal rear visibility. The adjustment mechanism typically includes a worm gear and a worm shaft. A motor drives the worm shaft to rotate, which in turn drives the worm gear. When the mirror reaches its extreme position, the worm gear stops rotating. The internal motor is prone to overheating or even burning out due to stalling, and the meshing teeth between the worm gear and the worm shaft are susceptible to wear and tooth breakage, leading to adjustment failure. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rearview mirror clutch device, which has the advantages of avoiding adjustment failure and improving service life.

[0004] This utility model also proposes a rearview mirror having the above-mentioned rearview mirror clutch device.

[0005] The rearview mirror clutch device according to this utility model includes: A mounting base is movably connected to a floating plate, and a screw is provided between the floating plate and the mounting base, with one end of the screw hinged to the floating plate; A clutch assembly includes an elastic element and a clutch element, wherein the clutch element is threadedly connected to the other end of the screw, and the elastic element is sleeved on the screw; A transmission assembly is disposed on the mounting base. The transmission assembly is sleeved around the clutch component. The elastic element abuts against the clutch component so that the clutch component and the transmission assembly are in contact. The transmission assembly is used to drive the clutch component to rotate and drive the screw to move up and down. The screw pushes the floating plate to swing.

[0006] The rearview mirror clutch device according to this utility model has at least the following beneficial effects: the screw is threadedly connected to the clutch component, the transmission assembly is sleeved around the clutch component, and the elastic element abuts against the clutch component, so that the clutch component and the transmission assembly press against each other. The transmission assembly can drive the clutch component to rotate, thereby causing the screw to move up and down and push the floating plate to swing. When the screw moves to the limit position, such as the upper or lower limit position, the screw does not move and restricts the rotation of the clutch component. At this time, the driving force of the transmission assembly overcomes the friction between the clutch component and the transmission assembly. The transmission assembly still maintains the driving tendency, while the clutch component remains stationary, thereby producing the effect of rotational engagement and disengagement of the transmission assembly and the clutch component, thus avoiding the problem of adjustment failure.

[0007] According to some embodiments of the present invention, the rearview mirror clutch device includes a transmission assembly comprising a worm, a worm wheel, and a driving member. The driving member drives the worm to rotate, and the outer ring of the worm wheel is connected to the worm to drive the worm wheel to rotate. The worm wheel abuts against the clutch member to drive the clutch member to rotate.

[0008] According to some embodiments of the present invention, the rearview mirror clutch device has a first friction slope on the side of the clutch member facing the worm gear, and the worm gear has a second friction slope that cooperates with the first friction slope.

[0009] According to some embodiments of the present invention, a rearview mirror clutch device is provided between the elastic element and the screw, and the bushing is provided with a sliding groove, through which the clutch element passes through the sliding groove and is mounted on the bushing.

[0010] According to some embodiments of the present invention, the rearview mirror clutch device has a limiting member on the side end face of the transmission assembly opposite to the clutch member, and a limiting groove is provided on the outer peripheral wall of the bushing, with the limiting member engaging with the limiting groove.

[0011] According to some embodiments of the present invention, the rearview mirror clutch device includes a ball head, a slot is provided on the side of the floating plate that is hinged to the screw, the screw is connected to a fixed slider, the slot and the fixed slider together form a ball head mounting groove, and the ball head is hinged to the ball head mounting groove.

[0012] According to some embodiments of the present invention, the rearview mirror clutch device has a locking protrusion on the ball head, the locking protrusion extending radially along the ball head, and a positioning groove on the groove wall of the locking groove, wherein the locking protrusion engages with the positioning groove to restrict the rotation of the screw.

[0013] According to some embodiments of the present invention, the rearview mirror clutch device is provided with a receiving groove, the elastic element is disposed in the receiving groove, and the elastic element abuts against the bottom wall of the receiving groove.

[0014] According to some embodiments of the present invention, the rearview mirror clutch device further includes a gasket, which is disposed on the side of the elastic member facing the floating plate, and one end face of the elastic member is attached to the gasket.

[0015] The rearview mirror according to this utility model includes the rearview mirror clutch device described in this utility model.

[0016] The rearview mirror according to this utility model has at least the following beneficial effects: When adjusting the rearview mirror angle, the continuous pressure provided by the elastic element ensures reliable engagement between the clutch and the transmission assembly. Simultaneously, the friction inclined surface enhances transmission stability. The cooperation between the transmission assembly and the clutch enables smooth driving, ensuring precise adjustment of the mirror angle and improving the adaptability of the driver's field of vision. Furthermore, when adjusted to the extreme position, the clutch assembly and the transmission assembly will rotate relative to each other, avoiding the problem of high current heating or even burnout caused by drive component stall, and preventing wear and tear on the worm gear and turbine meshing, thus avoiding adjustment failure. This significantly enhances the deflection stability of the rearview mirror and extends its service life.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional view of the rearview mirror clutch device according to an embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the clutch assembly is shown. Figure 3 This is an exploded view of the rearview mirror clutch device according to an embodiment of the present invention; Figure 4 for Figure 3 The diagram shows the structure of the clutch component; Figure 5 This is a schematic diagram of the floating plate of the rearview mirror clutch device according to an embodiment of the present invention.

[0019] Explanation of icon numbers: Mounting base 100; floating plate 110; slot 111; positioning slot 1111; screw 120; ball head 121; snap-fit ​​protrusion 1211; threaded part 122; limiting protrusion 130; fixed slider 140; Clutch assembly 200; elastic element 210; clutch component 220; first friction inclined surface 221; clearance groove 222; receiving groove 223; bushing 230; limiting groove 231; sliding groove 232; gasket 240; Transmission assembly 300; worm gear 310; second friction inclined surface 311; worm 320; limiting component 330; driving component 340. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The adjustment mechanism installed inside the car's rearview mirror allows for adjustment of the mirror's angle and field of vision, providing the driver with optimal rear visibility. The adjustment mechanism typically includes a turbine and a worm gear. A motor drives the worm gear to rotate, which in turn drives the turbine. When the mirror reaches its extreme position, the turbine stops. The internal motor is prone to overheating or even burning out due to stalling, and the meshing teeth between the worm gear and the worm gear are susceptible to wear and tooth breakage, leading to adjustment failure.

[0026] Therefore, such as Figures 1 to 5 As shown, the rearview mirror clutch device proposed in this utility model includes: a mounting base 100, a clutch assembly 200, and a transmission assembly 300. The mounting base 100 is the base of the entire rearview mirror. A floating plate 110 is movably connected to the mounting base 100. A screw 120 is provided between the floating plate 110 and the mounting base 100, and one end of the screw 120 is hinged to the floating plate 110. The clutch assembly 200 includes an elastic element 210 and a clutch element 220. The elastic element 210 is a spring, and the clutch element 220 is threadedly connected to the other end of the screw 120. The elastic element 210 is sleeved on the screw 120. The transmission assembly 300 is mounted on the mounting base 100 and sleeved around the clutch 220. The elastic element 210 abuts against the clutch 220 to ensure contact between the clutch 220 and the transmission assembly 300. The transmission assembly 300 drives the clutch 220 to rotate, thereby causing the screw 120 to move up and down and pushing the floating plate 110 to swing. When the screw 120 moves to its limit position, such as the upper or lower limit position, the screw 120 remains stationary, restricting the rotation of the clutch 220. At this time, the driving force of the transmission assembly 300 overcomes the friction between the clutch 220 and the transmission assembly 300. The transmission assembly 300 maintains its driving tendency, while the clutch 220 remains stationary, thus creating the effect of rotational engagement and disengagement between the transmission assembly 300 and the clutch 220, thereby avoiding the problem of adjustment failure.

[0027] In some embodiments of this utility model, such as Figures 1 to 3As shown, the transmission assembly 300 includes a worm 320, a worm wheel 310, and a drive component 340. The drive component 340 is a motor that drives the worm 320 to rotate. The worm 320 is a helical shaft with threads on its outer peripheral wall. The worm wheel 310 is a gear that meshes with the worm 320. The teeth of the worm wheel 310 are helical, and its outer ring is connected to the worm 320 to drive its rotation. The worm wheel 310 abuts against the clutch component 220, and the friction generated between the contacting end faces of the worm wheel 310 and the clutch component 220 drives the clutch component 220 to rotate, thereby driving the screw 120 to perform lifting and lowering movements.

[0028] In some embodiments of this utility model, such as Figures 1 to 3 As shown, the clutch 220 has a first friction slope 221 on the side facing the worm gear 310, and the worm gear 310 has a second friction slope 311 that cooperates with the first friction slope 221. The cooperation of the first friction slope 221 and the second friction slope 311 can significantly increase the contact area. Under the preload of the elastic element 210, the first friction slope 221 and the second friction slope 311 are tightly fitted, thereby improving the transmission efficiency of friction torque. When the worm gear 310 rotates, the second friction slope 311 drives the clutch 220 to rotate synchronously through friction, ensuring stable power transmission to the screw 120. When the screw 120 reaches its limit position and can no longer move, the clutch 220 remains stationary, and the friction between the clutch 220 and the worm gear 310 is broken, causing relative sliding between the worm gear 310 and the clutch 220, thus achieving transmission separation. This protects the transmission meshing between the worm 320 and the turbine, avoiding problems such as tooth shaving and gear breakage during meshing between the worm 320 and the turbine, and preventing the high current heating or even burnout caused by the stall of the drive component 340, thus avoiding the problem of electric adjustment failure.

[0029] In some embodiments of this utility model, such as Figures 2 to 4 As shown, a bushing 230 is also provided between the elastic element 210 and the screw 120. The bushing 230 has a cylindrical structure and is hollow. The bushing 230 is provided with a sliding groove 232, which extends along the axial direction of the bushing 230. The clutch element 220 passes through the sliding groove 232 and is fitted into the bushing 230. The clutch element 220 is correspondingly provided with a relief groove 222, allowing the clutch element 220 to slide relative to the sliding groove 232. The bushing 230 can prevent the elastic element 210 from directly contacting the screw 120, reducing frictional loss between them. At the same time, through the supporting effect of the bushing 230, the elastic force of the elastic element 210 can be transmitted more evenly to the clutch element 220, ensuring that the clutch element 220 and the worm gear 310 always maintain a stable fit.

[0030] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, a limiting element 330 is provided on the side end face of the transmission assembly 300 opposite to the clutch 220. The limiting element 330 is a retaining spring, which has the characteristics of simple structure and convenient installation. A limiting groove 231 is provided on the outer peripheral wall of the bushing 230. The limiting element 330 is engaged in the limiting groove 231. After the retaining spring is opened, it is engaged in the limiting groove 231 of the bushing 230, which can generate a continuous and stable radial clamping force to ensure that the relative position of the bushing 230 and the transmission assembly 300 remains fixed.

[0031] In real-world driving scenarios, drivers frequently need to adjust the left and right angles of their rearview mirrors to adapt to different road conditions, meet oncoming traffic, or check blind spots. These are high-frequency actions, while vertical angle adjustments are typically less frequent after the initial settings. Therefore, in some embodiments of this invention, such as... Figure 1 and Figure 5 As shown, the rearview mirror is a manually adjustable mirror for height and an electrically adjustable mirror for left and right. The mounting base 100 is equipped with a connecting post, and the screw 120 and the connecting post are spaced apart along the length of the floating plate 110. The side of the floating plate 110 connected to the mounting base 100 is a spherical surface, and the side of the connecting post connected to the floating plate 110 is also shaped to fit the spherical surface. A spring is fitted onto the connecting post. The spring presses against the side of the floating plate 110 away from the mounting base 100, providing a stable preload to the floating plate 110, ensuring a relatively stable position in the initial state. The spring also acts as a buffer and reset mechanism during the swinging motion of the floating plate 110 driven by the screw 120. The screw 120 moves up and down, pushing the floating plate 110 to swing left and right around the connecting post, thereby adjusting the left and right angles of the rearview mirror.

[0032] In some embodiments of this utility model, such as Figures 1 to 3 As shown, the screw 120 includes a ball head 121. A slot 111 is provided on the side of the floating plate 110 that is hinged to the screw 120. A fixed slider 140 is connected to the side wall of the slot 111. The dimensions of the fixed slider 140 are adapted to the slot 111 so that the fixed slider 140 slides into the slot 111 during screw 120 assembly. The slot 111 and the fixed slider 140 together form a ball head mounting groove, and the ball head 121 is hinged to the ball head 121 mounting groove. In some applications, simply aligning the fixed slider 140 connected to the screw 120 with the slot 111 on the floating plate 110 and gently pushing it in is sufficient to quickly and initially fix the ball head 121. Then, the fixed slider 140 is fixed to the floating plate 110 using fasteners. This simple, intuitive, and convenient installation method makes the entire installation process more efficient and accurate.

[0033] In some embodiments of this utility model, such as Figure 2 and Figure 5As shown, the ball head 121 is provided with a locking protrusion 1211, which has a cylindrical structure and extends radially along the ball head 121. The groove wall of the locking groove 111 is provided with a positioning groove 1111, and the locking protrusion 1211 is engaged with the positioning groove 1111 to restrict the rotation of the screw 120. When the clutch 220 drives the screw 120 to move up and down, the screw 120 can only move axially and cannot rotate, thereby ensuring that the thrust of the screw 120 is converted into the torque that pushes the floating plate 110 to swing, avoiding power loss or adjustment accuracy deviation caused by the rotation of the screw 120, and further improving the accuracy and reliability of angle adjustment.

[0034] In a further embodiment of this utility model, referring to Figures 1 to 3 The screw 120 includes a ball head 121 and a threaded portion 122. The ball head 121 is located at the end of the screw 120 connected to the floating plate 110. The screw 120 and the floating plate 110 are ball-jointed. A limiting protrusion 130 is provided between the ball head 121 and the threaded portion 122. The limiting protrusion 130 is used to restrict the lifting and lowering movement of the screw 120. The limiting protrusion 130 extends radially outward to form an annular flange structure. When the screw 120 moves axially up and down under the drive of the clutch 220, the limiting protrusion 130 will abut against the mounting base 100 or related components when it moves to a specific position, thereby restricting the screw 120 from continuing to move in that direction.

[0035] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the clutch component 220 is provided with a receiving groove 223, which provides installation space for the elastic component 210. The elastic component 210 is disposed in the receiving groove 223, that is, the elastic component 210 is entirely embedded in the receiving groove 223, and the elastic component 210 abuts against the bottom wall of the receiving groove 223. The receiving groove 223 forms a radial limit on the elastic component 210, ensuring that the elastic force is always stably transmitted to the clutch component 220 along the axial direction, so that the clutch component 220 and the worm gear 310 are kept in close contact, thereby causing the worm gear to drive the clutch component 220 to rotate in the same direction.

[0036] In some embodiments of this utility model, such as Figures 1 to 3As shown, the clutch assembly 200 also includes a gasket 240, which is disposed on the side of the elastic member 210 facing the floating plate 110, with one end face of the elastic member 210 fitting against the gasket 240. In some applications, one side of the bushing 230 is first sequentially fitted onto the clutch assembly 220 and the turbine, and then the limiting groove 231 of the bushing 230 is engaged with the limiting member 330 for limiting. Then, on the side of the bushing 230 away from the clutch assembly 220, the elastic member 210 and the gasket 240 are sequentially fitted onto it. After the shim 240 and the hydraulic press spring are compressed to a suitable force, pressure is applied from the four vertical horizontal directions of the shim 240 through the hydraulic riveting process, causing the shim 240 to deform. This allows the shim 240 to be firmly clamped at a suitable height position, and keeps the pressure of the elastic element 210 constant at a preset effective value. This ensures that the clutch element 220 and the worm gear 310 maintain a stable contact force, providing preload guarantee for the synchronous rotation of the clutch element 220 and the worm gear.

[0037] A rearview mirror according to an embodiment of the present invention includes a rearview mirror clutch device according to an embodiment of the present invention.

[0038] According to the rearview mirror of this utility model embodiment, by employing the rearview mirror clutch device of this utility model embodiment, when adjusting the rearview mirror angle, the continuous pressure provided by the elastic element 210 ensures reliable engagement between the clutch element 220 and the transmission component 300. Simultaneously, the friction inclined surface enhances transmission stability. The cooperation between the transmission component 300 and the clutch element 220 enables smooth driving, ensuring precise adjustment of the mirror angle and improving the adaptability of the driving field of vision. Furthermore, when adjusted to the extreme position, the clutch component 200 and the transmission component 300 will rotate relative to each other, avoiding the problem of high current heating or even burnout caused by the drive component 340 stalling, and preventing the wear and tear of the gear teeth between the worm gear 320 and the turbine, thus avoiding adjustment failure and significantly enhancing the deflection stability and extending the service life of the rearview mirror.

[0039] Other configurations and operations of the rearview mirror according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rearview mirror clutch device, characterized in that, include: A mounting base is movably connected to a floating plate, and a screw is provided between the floating plate and the mounting base, with one end of the screw hinged to the floating plate; A clutch assembly includes an elastic element and a clutch element, wherein the clutch element is threadedly connected to the other end of the screw, and the elastic element is sleeved on the screw; A transmission assembly is disposed on the mounting base. The transmission assembly is sleeved around the clutch component. The elastic element abuts against the clutch component so that the clutch component and the transmission assembly are in contact. The transmission assembly is used to drive the clutch component to rotate and drive the screw to move up and down. The screw pushes the floating plate to swing.

2. The rearview mirror clutch device according to claim 1, characterized in that: The transmission assembly includes a worm, a worm wheel, and a driving component. The driving component drives the worm to rotate. The outer ring of the worm wheel is connected to the worm to drive the worm wheel to rotate. The worm wheel abuts against the clutch to drive the clutch to rotate.

3. The rearview mirror clutch device according to claim 2, characterized in that: The clutch component has a first friction slope on the side facing the worm gear, and the worm gear has a second friction slope that cooperates with the first friction slope.

4. The rearview mirror clutch device according to claim 1, characterized in that: A bushing is provided between the elastic element and the screw, and the bushing is provided with a sliding groove. The clutch element passes through the sliding groove and is mounted on the bushing.

5. The rearview mirror clutch device according to claim 4, characterized in that: The transmission assembly is provided with a limiting member on the side face away from the clutch, and the outer peripheral wall of the bushing is provided with a limiting groove, and the limiting member is engaged with the limiting groove.

6. The rearview mirror clutch device according to claim 1, characterized in that: The screw includes a ball head, and a slot is provided on the side of the floating plate that is hinged to the screw. The screw is connected to a fixed slider, and the slot and the fixed slider together form a ball head mounting groove, and the ball head is hinged to the ball head mounting groove.

7. The rearview mirror clutch device according to claim 6, characterized in that: The ball head is provided with a snap-fit ​​protrusion that extends radially along the ball head. The groove wall of the snap-fit ​​groove is provided with a positioning groove, and the snap-fit ​​protrusion snaps into the positioning groove to restrict the rotation of the screw.

8. The rearview mirror clutch device according to claim 1, characterized in that: The clutch is provided with a receiving groove, and the elastic element is disposed in the receiving groove, with the elastic element abutting against the bottom wall of the receiving groove.

9. The rearview mirror clutch device according to claim 8, characterized in that: The clutch assembly also includes a gasket, which is disposed on the side of the elastic member facing the floating plate, and one end face of the elastic member is in contact with the gasket.

10. A rearview mirror, characterized in that: Includes the rearview mirror clutch device as described in any one of claims 1 to 9.

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