Rearview mirror adjusting device and rearview mirror assembly with rearview mirror adjusting device

Abstract

The invention relates to the field of rearview mirrors, in particular to a rearview mirror adjusting device and a rearview mirror assembly with the rearview mirror adjusting device, and the rearview mirror adjusting device comprises a folding module, a base unit, a pre-tightening unit and a rolling positioning unit; the base unit is connected to a vehicle body; the pre-tightening unit is used for mounting and limiting the folding module on the base unit; the rolling positioning unit is arranged at the joint of the folding module and the base unit; the folding module can rotate on the base unit through the rolling positioning unit; through the arrangement of the rolling positioning unit, the friction force between the folding module and the base unit can be reduced; the operation resistance of the folding module is reduced, and meanwhile the abrasion loss between the folding module and the base unit is reduced.

Description

Technical Field

[0001] This invention relates to the field of rearview mirrors, and more specifically to a rearview mirror adjustment device and a rearview mirror assembly having the rearview mirror adjustment device. Background Technology

[0002] As the automotive industry continues to develop, the exterior rearview mirror, as an important component to ensure driving safety, has received increasing attention for its design rationality and structure.

[0003] Traditional manual adjustment mechanisms for folding exterior rearview mirrors often employ gear and rack or sliding groove structures, which suffer from problems such as laborious adjustment, poor positioning accuracy, and easy wear.

[0004] Some devices that use spring positioning are at risk of positioning failure due to elastic decay, and lack multi-position precise locking function.

[0005] Traditional rearview mirror adjustment devices mostly use a rack and pinion or sliding groove structure, which has the following drawbacks:

[0006] High friction loss: High contact stress on the gear meshing surface leads to increased adjustment torque. Long-term use can easily cause tooth surface wear, resulting in increased resistance or even jamming.

[0007] Low space utilization: Traditional hinged folding mechanisms require a large amount of rotation space, and the multi-stage transmission structure results in axial dimensions generally exceeding 35mm, which makes it difficult to meet the compact layout requirements of new energy vehicles.

[0008] Poor smoothness of movement: The gear meshing and hinge structure are prone to jamming during folding, causing the rearview mirror unfolding angle to deviate by more than ±1.5°.

[0009] The existing patent CN 113022452 A - A rearview mirror adjustment device, rearview mirror and adjustment method for automobiles does not clearly disclose the technical content that solves the above-mentioned technical problems.

[0010] Therefore, in order to improve or solve at least one of the above technical problems, it is necessary to optimize the design of the existing rearview mirror structure. Summary of the Invention

[0011] The purpose of this invention is to provide a rearview mirror adjustment device with low rotational friction and low frictional loss.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0013] A rearview mirror adjustment device includes a folding module, a base unit, a pre-tensioning unit, and a rolling positioning unit;

[0014] The base unit is connected to the vehicle body;

[0015] The pre-tightening unit is used to limit the installation of the folding module on the base unit;

[0016] The rolling positioning unit is arranged at the junction of the folding module and the base unit;

[0017] The folding module can rotate on the base unit via a rolling positioning unit.

[0018] The folding module includes a connecting arm and a guide post, and the guide post is provided with a socket hole;

[0019] The base unit includes a base, and the base is provided with a plug-in post;

[0020] The folding module is sleeved onto the insertion post via a guide post;

[0021] The rolling positioning unit includes an annular raceway and a rolling assembly disposed on the base.

[0022] The rolling assembly includes steel balls arranged on an annular raceway and an upper connecting groove disposed on a guide post; the upper connecting groove is arranged at intervals relative to the annular raceway.

[0023] The steel ball is arranged in the upper connecting groove on one side and can be arranged in the annular raceway on the other side;

[0024] The guide post can drive the steel balls to roll in the annular raceway through the upper connecting groove.

[0025] The rolling positioning unit further includes a positioning mechanism, which includes a positioning groove disposed on the base; the positioning groove is disposed on the annular raceway; the horizontal projection width of the positioning groove is greater than the horizontal projection width of the annular raceway.

[0026] The rolling positioning unit includes at least two rolling components; multiple rolling components are evenly distributed at intervals on the annular raceway; each rolling component corresponds to a positioning mechanism.

[0027] The rolling positioning unit also includes a transition component;

[0028] At least one transition component is provided between adjacent rolling components, and each transition component includes a transition groove provided on the base;

[0029] The horizontal projection width of the transition groove is greater than the horizontal projection width of the annular raceway; the horizontal projection width of the transition groove is less than the horizontal projection width of the positioning groove.

[0030] The rearview mirror adjustment device also includes a limiting unit, which includes a guide ring block disposed on the base and a guide ring groove disposed on the guide post; the guide post is sleeved on the guide ring block through the guide ring groove.

[0031] The guide post includes a column body; the column body is provided with a connecting hole.

[0032] The socket hole includes a primary through hole, a secondary through hole, and a tertiary through hole; the primary through hole is connected to the tertiary through hole through the secondary through hole;

[0033] The inner diameter of the third-level through hole is larger than that of the second-level through hole, and the inner diameter of the second-level through hole is larger than that of the first-level through hole.

[0034] The three-level through holes are arranged close to the base in the base unit;

[0035] The rolling positioning unit is arranged in the area between the three-level through hole and the base.

[0036] The base is provided with a support mechanism, which includes a support block set on the side wall of the base; the end of the guide column abuts against the support block; the upper surface of the support block is an arc-shaped surface.

[0037] A rearview mirror assembly includes a rearview mirror body; the rearview mirror body is connected to a rearview mirror adjustment device; the rearview mirror adjustment device is connected to the vehicle body via a rearview mirror mounting plate; the rearview mirror adjustment device is detachably connected to the rearview mirror mounting plate.

[0038] The base unit is connected to the rearview mirror mounting plate via a connecting unit; the connecting unit includes an assembly column on the base; the assembly column has an assembly hole; the base is connected to the rearview mirror mounting plate via fasteners.

[0039] The advantages of this invention are:

[0040] The present invention discloses a rearview mirror adjustment device and a rearview mirror assembly having the rearview mirror adjustment device.

[0041] By setting up a rolling positioning unit, this invention can reduce the friction between the folding module and the base unit, reduce the running resistance of the folding module, and reduce the wear and tear between the folding module and the base unit.

[0042] In addition, this invention replaces traditional sliding friction with rolling steel balls, reducing operating torque by more than 75%; the geometric fit of the positioning mechanism forms a self-locking angle, realizing stepped positioning in stepless adjustment; the pre-tightening unit provides stable pre-tightening force compensation, ensuring positioning accuracy throughout the entire life cycle; furthermore, this invention is equipped with multiple positioning mechanisms and rolling components; it can achieve multi-point contact stress distribution to improve load-bearing capacity, and the impact load resistance can reach 50 N·m. Attached Figure Description

[0043] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0044] Figure 1 This is an exploded view of the present invention.

[0045] Figure 2 This is a schematic diagram of the folding module in this invention.

[0046] Figure 3 for Figure 2 A sectional view along AA.

[0047] Figure 4 This is a bottom view of the folding module in this invention.

[0048] Figure 5 This is the front view of the folding module in this invention.

[0049] Figure 6 This is a top view of the base unit in this invention.

[0050] Figure 7 This is a bottom view of the base unit in this invention.

[0051] Figure 8 This is a schematic diagram of the structure when the base unit and the pre-tightening unit are connected in this invention.

[0052] Figure 9 This is a schematic diagram of the structure when the base unit is connected to the rearview mirror mounting plate in this invention.

[0053] Figure 10 This is a schematic diagram of the structure when the rearview mirror adjustment device is connected to the rearview mirror mounting plate in this invention.

[0054] The markings in the above figures are all:

[0055] 1. Folding module, 2. Base unit, 3. Pre-tightening unit, 4. Rolling positioning unit. Detailed Implementation

[0056] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0057] A rearview mirror adjustment device includes a folding module 1, a base unit 2, a pre-tightening unit 3, and a rolling positioning unit 4. The base unit 2 is connected to the vehicle body. The pre-tightening unit 3 is used to limit the installation of the folding module 1 on the base unit 2. The rolling positioning unit 4 is arranged at the junction of the folding module 1 and the base unit 2. The folding module 1 can rotate on the base unit 2 through the rolling positioning unit 4. By setting the rolling positioning unit 4, the present invention can reduce the friction between the folding module 1 and the base unit 2, reduce the running resistance of the folding module 1, and reduce the wear and tear between the folding module 1 and the base unit 2.

[0058] Specifically, the rearview mirror adjustment device disclosed in this invention is mainly used for the connection between the rearview mirror body and the rearview mirror mounting plate 5.

[0059] In this invention, the rearview mirror adjustment device mainly includes a folding module 1, a base unit 2, a pre-tightening unit 3, and a rolling positioning unit 4. The folding module 1 facilitates the subsequent connection with the rearview mirror body, while the base unit 2 is a basic support block 24, which plays a good bridging role. The pre-tightening unit 3 facilitates the stability of the folding module 1 placed on the base unit 2 and provides a pressing force for the rolling positioning unit 4.

[0060] The rolling positioning unit 4 acts as a rolling element to achieve rolling friction between the folding module 1 and the base unit 2.

[0061] In this invention, the base unit 2 is a static foundation and installation platform; the base unit 2 is the "foundation" of the entire device.

[0062] Securely attached to designated locations on the car door or body using bolts or clips, providing stable support for the entire rearview mirror assembly.

[0063] In this invention, the base unit 2 is designed with an annular track or groove (raceway) for the rolling element to run.

[0064] Folding module 1 is the "active part" of the entire device.

[0065] One end of it is "sat" on the base unit 2 via the rolling positioning unit 4, allowing it to rotate smoothly; the other end is used to install the mirror housing and lens of the rearview mirror.

[0066] The folding and unfolding of the rearview mirror is essentially the rotation of this module relative to the base.

[0067] In this invention, by introducing a rolling positioning unit 4, the sliding friction of the traditional mechanism is transformed into rolling friction.

[0068] This is like a precision bearing specifically designed for a rearview mirror; the rolling positioning unit 4, as the "rolling element," is the core of this invention.

[0069] Preload unit 3: Provides stable and adjustable clamping force to ensure that the rolling elements are always in close contact with the contact surface, eliminate gaps, and control rotational damping.

[0070] Base unit 2 and folding module 1: The precision tracks (such as V-grooves and annular raceways 42) on their joint surfaces together form the inner and outer rings of the "bearing", which constrain and guide the movement trajectory of the rolling elements.

[0071] Based on the aforementioned core functions, the device immediately brought about three major direct effects:

[0072] The operation is extremely effortless and smooth:

[0073] Because the resistance of rolling friction is much less than that of sliding friction, users will find it very easy and smooth to fold the rearview mirror manually, without any stickiness.

[0074] Minimal wear and tear, significantly extended lifespan:

[0075] The wear caused by rolling friction is negligible, which fundamentally solves the problems of loosening, jamming and failure caused by wear in traditional mechanisms, making the device durable.

[0076] It runs smoothly without shaking or abnormal noise.

[0077] The pressure provided by the preload unit 3 eliminates the gaps between components, so that the rearview mirror will not produce unpleasant shaking or "creaking" noises when the vehicle is bumpy, thus improving the overall quality of the vehicle.

[0078] In this invention, the base unit 2 serves as the foundation: the base unit 2 is firmly mounted on the vehicle body and is the static foundation of the entire device.

[0079] The rolling unit acts as an intermediary: the rolling positioning unit 4 (usually a high-precision steel ball 41) is placed in a specially made annular raceway 42 (or V-groove) on the base unit 2.

[0080] Folding module 1 covers it: Then, folding module 1 covers the rolling positioning unit 4.

[0081] Its bottom is also designed with a raceway (or V-groove) corresponding to the base unit 2. In this way, the steel ball 41 is precisely "clamped" between the base unit 2 and the folding module 1.

[0082] Pre-tightening unit 3 completes locking: Finally, pre-tightening unit 3 (usually includes spring 33, snap ring 31 and fastening bolt) applies an adjustable pressure from the axial direction to tightly press the folding module 1, rolling positioning unit 4 and base unit 2 together to form a complete rotating pair without looseness.

[0083] The folding module 1 is not directly connected to the base unit 2, but is connected through the "intermediary" of the rolling positioning unit 4; this is a dynamic connection that allows relative rotation between the two.

[0084] Furthermore, in this invention, the base unit 2 is connected to the vehicle body; the pre-tightening unit 3 is used for the installation limit of the folding module 1 on the base unit 2; the rolling positioning unit 4 is arranged at the junction of the folding module 1 and the base unit 2; the folding module 1 can rotate on the base unit 2 through the rolling positioning unit 4; this invention uses the rolling of steel balls 41 to replace traditional sliding friction, reducing the operating torque by more than 75%; the geometric fit of the positioning mechanism forms a self-locking angle, realizing stepped positioning in stepless adjustment; the pre-tightening unit 3 provides stable pre-tightening force compensation, ensuring positioning accuracy throughout the entire life cycle; in addition, this invention is provided with multiple positioning mechanisms and rolling components; it can realize multi-point contact stress distribution to improve load-bearing capacity, and the impact load resistance can reach 50 N·m.

[0085] Furthermore, in this invention, the folding module 1 includes a connecting arm 11 and a guide post 12, and the guide post 12 is provided with a socket hole 13; the arrangement of the connecting arm 11 and the guide post 12 facilitates the connection between the folding module 1 and the base unit 2.

[0086] In this invention, the base unit 2 includes a base 21, on which a plug-in post 22 is provided; in this invention, the base 21 and the plug-in post 22 form a convex structure, which facilitates the fitting and installation of the folding module 1 on the base unit 2.

[0087] In this invention, the folding module 1 is sleeved on the insertion post 22 via the guide post 12; based on the above design, this invention facilitates the installation and fixation of the folding module 1 on the base unit 2.

[0088] In this invention, the rolling positioning unit 4 includes an annular raceway 42 and a rolling assembly disposed on the base 21. The rolling assembly includes a steel ball 41 disposed on the annular raceway 42 and an upper connecting groove 43 disposed on the guide post 12. The upper connecting groove 43 is arranged at intervals relative to the annular raceway 42. One side of the steel ball 41 is disposed in the upper connecting groove 43, and the other side can be disposed in the annular raceway 42. The guide post 12 can drive the steel ball 41 to roll in the annular raceway 42 through the upper connecting groove 43. The upper connecting groove 43 is a V-shaped groove. In subsequent use, the guide post 12 can drive the steel ball 41 to run on the annular raceway 42, thereby realizing the rotation of the folding module 1 relative to the base unit 2.

[0089] The lower end of the guide post 12 has a socket hole 13 that fits directly onto the plug post 22 on the base 21; this ensures that the folding module 1 (guide post 12) can rotate precisely around the axis of the plug post 22 to prevent radial sway; it mainly bears the main weight of the rearview mirror body as well as radial forces (such as wind) from all directions.

[0090] Steel ball 41, upper connecting groove 43 (on guide post 12), annular raceway 42 (on base 21).

[0091] The steel ball 41 is precisely placed in a closed, annular "racetrack" formed by the upper connecting groove 43 and the annular raceway 42 with relative intervals; to achieve rolling friction: when the folding module 1 rotates, the steel ball 41 rolls between the upper and lower grooves, turning harmful sliding friction into efficient rolling friction.

[0092] Torque transmission: When the rearview mirror is folded forcefully, this force is transmitted to the guide column 12 through the connecting arm 11. The guide column 12 then squeezes and drives the steel ball 41 through the upper connecting groove 43 on it. The steel ball 41 rolls along the annular raceway 42, thereby realizing rotation.

[0093] The pre-tightening unit 3 is sleeved on the guide post 12 and connected to the plug post 22; the pre-tightening unit 3 applies an axial pre-tightening force, which will press the guide post 12 downward, thereby pressing the steel ball 41 located between the guide post 12 and the base 21.

[0094] In this invention, the pre-tightening unit 3 is mainly used to eliminate gaps: ensuring that there is no looseness between the steel ball 41 and the upper connecting groove 43 and the annular raceway 42, and avoiding abnormal noise.

[0095] It also provides appropriate damping: controlling the tightness of the folding operation, making it both lightweight and secure.

[0096] Furthermore, the rolling positioning unit 4 in this invention also includes a positioning mechanism. The positioning mechanism facilitates the position limitation of the folding module 1 after it is rotated to the designed position. The positioning mechanism includes a positioning groove 41 disposed on the base 21. The positioning groove 41 is disposed on the annular raceway 42. The horizontal projection width of the positioning groove 41 is greater than the horizontal projection width of the annular raceway 42. The positioning groove 41 can be used to limit the lower end of the steel ball 41, thereby realizing the position limitation of the folding module 1.

[0097] In this invention, the positioning mechanism includes a positioning groove 41 disposed on the annular raceway 42 of the base 21; the horizontal projection width of the positioning groove 41 is greater than the horizontal projection width of the annular raceway 42; the annular raceway 42 is a "raceway" with uniform width, and the positioning groove 41 is a "pit" formed by locally widening and sinking on this raceway.

[0098] During rotation, the steel ball 41 rolls on the smooth annular raceway 42 with very little resistance. When it rotates to a specific angle (i.e., at the positioning groove 41), the steel ball 41 will "fall into" the groove under the action of the preload, producing a noticeable "click" and a slight vibration.

[0099] This provides the operator with clear tactile and auditory feedback, indicating that the rearview mirror has reached a preset stable position (such as fully extended, fully folded, or a certain intermediate adjustment position).

[0100] Once the steel ball 41 falls into the positioning groove 41, it needs to overcome a greater resistance to "push" it out of the groove; this creates a self-locking effect.

[0101] This ensures that the rearview mirror will not easily deviate from its set position when the vehicle is vibrating or encountering a minor collision, and it has extremely strong anti-interference capabilities.

[0102] The present invention upgrades a simple continuous rotation mechanism into a high-performance mechanism with discrete positioning function by designing the positioning groove 41.

[0103] Meanwhile, the positioning groove 41 provides users with intuitive operational feedback and greatly improves the holding force and stability of the rearview mirror at specific angles, which is one of the key designs to ensure that the entire device is "easy to use and durable".

[0104] Furthermore, the rolling positioning unit 4 described in this invention includes at least two rolling components; multiple rolling components are evenly distributed at intervals on the annular raceway 42; each rolling component corresponds to a positioning mechanism; on the annular raceway 42 of the base 21, there are at least two (usually three, to achieve the most stable "three points determine a plane") rolling components; these rolling components are evenly spaced along the circumferential direction (e.g., two components are symmetrically distributed at 180°, and three components are symmetrically distributed at 120°); each positioning groove 41 (positioning mechanism) provided on the annular raceway 42 corresponds to each rolling component.

[0105] In other words, the system achieves one positioning when all the steel balls 41 fall into their respective grooves at the same time.

[0106] Multiple uniform supports form a stable rolling platform; three-point support can completely define a plane, which can effectively prevent the folding module 1 from tilting, shaking or getting stuck during rotation.

[0107] During positioning, all steel balls 41 fall into their respective positioning grooves 41 simultaneously; this means that the locking force is evenly distributed circumferentially and there is no unilateral stress; the folding module 1 will not experience slight offset or wobbling near the positioning point; due to the uniform torque, it is necessary to overcome the resistance of all positioning points at the same time to rotate it, which makes its self-locking effect at the set position very strong, and the rearview mirror will not come loose without external force.

[0108] At the same time, multiple rolling components can evenly distribute the load across multiple rolling components, greatly reducing the pressure on the contact surface between each steel ball 41 and the raceway; consequently, the wear rate of each contact point slows down, thereby extending the service life of the entire device and ensuring that the folding force remains stable after long-term use.

[0109] Furthermore, the rolling positioning unit 4 in this invention also includes a transition component; in this invention, the transition component mainly acts as an intermediate locking limit; in other words, it increases the rotation and stopping position of the folding module 1 and increases the hovering and fixing position of the rearview mirror.

[0110] In this invention, at least one transition component is provided between adjacent rolling components, and each transition component includes a transition groove 43 disposed on the base 21; the horizontal projection width of the transition groove 43 is greater than the horizontal projection width of the annular raceway 42; the horizontal projection width of the transition groove 43 is less than the horizontal projection width of the positioning groove 41; based on the above design, this invention is essentially equivalent to creating an "intermediate level" and "stepless adjustment" capability; in this invention, the transition groove 43 provides an intermediate state between smooth rolling and firm locking.

[0111] When the steel ball 41 falls into the transition groove 43, it provides a certain holding force, but this force is less than that of the main positioning point.

[0112] Users can position the rearview mirror at several intermediate angles. This is very useful in certain scenarios, such as when manually folding the rearview mirror in a narrow space, allowing the user to adjust it to the most space-saving angle that is neither fully unfolded nor fully folded.

[0113] During rotation, the steel ball 41 will roll over the smooth raceway, fall into the transition groove 43, roll out, and fall into the main positioning groove 41 in sequence.

[0114] Each time the device passes through the transition groove 43, there is a slighter but still clearly discernible "click" compared to the main positioning point; this provides users with richer operational feedback; even when adjusting the illumination angle of the rearview mirror, users can perceive the adjustment range by touch, achieving a near "stepless" yet responsive fine adjustment.

[0115] During rapid folding, the transition groove 43 can play a certain buffering role, preventing the steel ball 41 from directly "colliding" with the main positioning groove 41 with excessive impact force, which helps to protect the surface accuracy of the raceway and the steel ball 41 and extend its service life.

[0116] Positioning groove 41 provides "ultimate locking"; used in the most frequently used and most stable positions of the rearview mirror (such as when fully extended and fully folded).

[0117] The transition groove 43 provides "center lock" or "transient hold", greatly enriching the angle adjustment possibilities of the rearview mirror.

[0118] Furthermore, the rearview mirror adjustment device described in this invention also includes a limiting unit, which can prevent the folding module 1 from rotating excessively on the base unit 2.

[0119] In this invention, the limiting unit includes a guide ring block 441 disposed on the base 21 and a guide ring groove 44 disposed on the guide post 12; the guide post 12 is sleeved on the guide ring block 441 through the guide ring groove 44; the guide ring block 441 is an annular protrusion structure disposed on the base 21; the guide ring groove 44 is an annular groove disposed on the guide post 12 that precisely matches it; the size of the guide ring groove 44 is larger than the size of the guide ring block 441, so that when the folding module 1 rotates, the guide ring block 441 can limit the extreme position of the folding module 1, avoiding the folding module 1 from being over-folded or over-opened.

[0120] Furthermore, in this invention, the guide post 12 includes a post body; the post body is provided with a socket hole 13; the socket hole 13 includes a primary through hole 131, a secondary through hole 132, and a tertiary through hole 133; the primary through hole 131 is connected to the tertiary through hole 133 through the secondary through hole 132; the inner diameter of the tertiary through hole is larger than that of the secondary through hole 132, and the inner diameter of the secondary through hole 132 is larger than that of the primary through hole; the tertiary through hole is arranged close to the base 21 in the base unit 2; based on the above design, this invention makes the socket hole 13 a stepped hole structure. This setting can realize the installation and positioning of the guide post 12 and the insertion post 22, while the secondary through hole and the tertiary through hole form a stepped platform, which facilitates the arrangement and placement of the rolling positioning unit 4.

[0121] In addition, the rolling positioning unit 4 described in this invention is arranged in the area between the three-level through hole and the base 21; the three holes are equivalent to being fitted onto the rolling positioning unit 4 and the base 21, which plays a good role in lateral protection.

[0122] In this invention, a mounting mechanism is provided around the base 21. The mounting mechanism includes a support block 24 disposed on the side wall of the base 21. The end of the guide column 12 presses against the support block 24. The upper surface of the support block 24 is an arc-shaped surface. The support block 24 can limit the longitudinal installation position of the guide column 12, avoid excessive compression of the steel ball 41 by the guide column 12, and reduce the wear of the rolling positioning unit 4. In addition, the upper surface of the support block 24 of this invention is an arc-shaped surface, so that the guide column 12 and the upper end of the support block 24 form a line contact, so that when the support block 24 provides longitudinal support for the guide column 12, it can also reduce the running resistance of the guide column 12 rotation.

[0123] In this invention, the support block 24 can provide longitudinal installation limit and overload protection; the preload unit 3 (such as spring 33 and bolt) will apply a downward force, which will eventually press all of the force onto the steel ball 41 through the guide post 12; if the pressure is too high, or if it is subjected to pressure for a long time, it may cause plastic deformation (indentation) of the steel ball 41 and the raceway, which will increase friction and wear.

[0124] The support block 24 acts as a "mechanical stop" or "hard limit" to protect the steel ball 41, ensuring that the preload does not squeeze the steel ball 41 indefinitely and excessively, and keeping the force on the steel ball 41 within a safe range of elastic deformation.

[0125] It can also establish an auxiliary load path to improve reliability; during static or normal rotation, the axial force is mainly borne by steel ball 41.

[0126] However, when subjected to severe impacts (such as vehicle vibration or excessive manual force), the contact surface between the support block 24 and the guide column 12 can share part of the axial impact load; forming a dual-path force system of main (steel ball 41) and auxiliary (support block 24), which improves the structural strength and impact resistance of the entire device.

[0127] The upper surface of the support block 24 is curved, so that the guide post 12 and the upper end of the support block 24 form a line contact; thus realizing the transformation from "surface friction" to "line friction": if two planes are in contact, a huge sliding friction force will be generated between the contact surfaces when they rotate relative to each other, which will seriously hinder the rotation of the guide post 12, making the operation difficult and violating the original intention of using steel balls 41 to reduce friction; however, after changing the contact to a line contact between the curved surface and the plane, the contact area between them becomes extremely small; when the guide post 12 rotates, the frictional torque generated at this line contact point is very small.

[0128] A rearview mirror assembly includes a rearview mirror body; the rearview mirror body is connected to a rearview mirror adjustment device; the rearview mirror adjustment device is connected to the vehicle body via a rearview mirror mounting plate 5; in this invention, the rearview mirror body mainly includes a mirror housing, a mirror lens, and turn signals, etc., and is the main structure for the function of the rearview mirror.

[0129] The rearview mirror body is connected to the folding module 1.

[0130] The rearview mirror mounting plate 5 is a metal or high-strength plastic plate that is directly fixed to the door sheet metal; the rearview mirror mounting plate 5 is the static interface connecting the vehicle body and the entire movable rearview mirror assembly.

[0131] In this invention, the rearview mirror adjustment device is connected to the rearview mirror mounting plate 5 via a detachable connection; this connection method has the following advantages:

[0132] Extreme ease of maintenance and low cost, modular production and assembly.

[0133] On the automotive production line, different suppliers can provide different modules.

[0134] The assembly plant can first install the rearview mirror mounting plate 5 on the door, and then quickly install the complete rearview mirror assembly (body + adjustment device) as a module; this simplifies the assembly process and improves production efficiency.

[0135] The flexibility of platform design; the same adjustment device can be adapted to the door panel curvature and mounting points of different models by designing different rearview mirror mounting plates 5; this enhances the versatility of parts and reduces R&D and mold costs.

[0136] Furthermore, in this invention, the base unit 21 of the base unit 2 is connected to the rearview mirror mounting plate 5 through a connecting unit; the connecting unit includes an assembly column 23 disposed on the base 21; the assembly column 23 is provided with an assembly hole; the base 21 is connected to the rearview mirror mounting plate 5 through fasteners; in this invention, the assembly column 23 provides strong shear and torsional resistance, ensuring that the rearview mirror assembly is stable and does not loosen during vehicle operation.

[0137] The mounting column 23 itself can be used as a positioning pin, which can be inserted into the rearview mirror mounting plate 5 later; thereby ensuring that the adjustment device can be quickly and accurately aligned and installed on the rearview mirror mounting plate 5.

[0138] At the same time, the force is transferred to a larger area of ​​the base 21 through the column-shaped assembly column 23 structure, thus avoiding stress concentration.

[0139] Example:

[0140] This invention discloses a rearview mirror adjustment device; mainly to overcome the defects of existing rearview mirror folding mechanisms, such as large folding force, large friction loss, and insufficient stability in unfolding and positioning. The adjustment device disclosed in this invention achieves efficient transmission and precise positioning through an innovative rolling friction system.

[0141] The folding module 1 is essentially a low-resistance folding module 1; the folding module 1 includes a connecting arm 11 and a guide post 12 integrally formed, which are injection molded from PA66 material. The lower end of the guide post 12 has three V-shaped grooves and a positioning guide groove. The V-shaped grooves contact the steel ball 41, converting sliding friction into rolling friction.

[0142] The connecting arm 11 forms a rotating pair with the compact base unit 2 via the guide post 12, with a rotation angle range of ±30° and mechanical limit.

[0143] The guide post 12 extends vertically from the end of the connecting arm 11.

[0144] The base unit 2 is a base 21 formed by die casting of ADC12 aluminum alloy with an anodized surface. The base 21 has a steel ball 41 cage forming an annular raceway 42. The raceway cross section is an anti-detachment groove. The bottom of the anti-detachment groove is provided with a R0.2 rounded corner transition. The circumferentially continuous stroke closed-loop structure has a groove depth d=2mm.

[0145] (Example: When the diameter of steel ball 41 is 5mm, h=2mm, which is 40% of the diameter of steel ball 41).

[0146] The preload unit 3 includes an axially arranged snap ring assembly and a fastening bolt. The snap ring assembly includes a snap ring 31, a cup washer 32, and a spring 33, which is used to apply an axial preload force to the rolling positioning assembly. The preload force is adjustable in the range of 40-100 N·m.

[0147] The rolling positioning assembly includes an annular raceway 42, three rolling components, and three positioning mechanisms.

[0148] The rolling assembly includes precision hardened steel balls 41. Three hardened steel balls 41 are located in the annular cavity formed between the base unit 2 and the three V-shaped grooves. The hardened steel balls 41 are made of GCr15 bearing steel, with a diameter tolerance of ±0.01mm, a surface hardness of HRC58-62, a diameter of φ5mm, and are distributed equidistantly along the circumference in number. The bottom of the steel ball 41 is embedded in the anti-loosening groove with a depth ≥0.15mm, and the gap between the top and the guide groove of the guide post 12 is δ=0.05±0.01mm.

[0149] Folding module 1 is injection molded using PA66 (Nylon 66).

[0150] This material has good mechanical strength, wear resistance and self-lubricating properties, and is low in cost and light in weight.

[0151] The upper connecting groove 43 is a V-shaped groove: this is the key to realizing rolling friction and force transmission.

[0152] Its line contact with the steel ball 41 can efficiently transmit torque and convert sliding into rolling.

[0153] The base unit 2ADC12 is die-cast from aluminum alloy and anodized on the surface.

[0154] ADC12 is a classic die-cast aluminum alloy with good fluidity and moderate strength; anodizing enhances its surface hardness, wear resistance, and corrosion resistance.

[0155] The annular raceway 42 forms a "bearing outer ring" structure.

[0156] The rolling positioning unit 4 mainly includes steel balls 41: the material of steel balls 41 is GCr15 bearing steel, which has high and uniform hardness.

[0157] Specifications: Diameter φ5mm, tolerance ±0.01mm, hardness HRC58-62; These strict tolerances and heat treatment requirements ensure that the three steel balls 41 are of consistent size, thereby ensuring uniform stress and stable operation.

[0158] Three points are evenly distributed along the circumference; three points define a plane. This layout provides optimal stability and avoids jamming caused by "over-positioning" that may occur with four-point contact.

[0159] Gap control: The gap between the top and guide post 12 is δ=0.05±0.01mm, and the bottom embedment depth is ≥0.15mm. These micron-level controls are the core to ensure smooth operation and prevent looseness.

[0160] The pre-tightening unit 3 mainly includes a retaining spring 31, a cup pad 32, a spring 33, and a fastening bolt.

[0161] Function of pre-tightening unit 3:

[0162] Eliminating gaps: The continuous pressure provided by spring 33 eliminates all clearances between components, ensuring no abnormal noises or shaking under vehicle vibration conditions.

[0163] Maintaining torque: Provides adjustable preload (40-100 N•m) for a folding feel that is “firm yet smooth”, neither too loose nor too tight.

[0164] Wear compensation: When parts experience extremely minor wear, spring 33 can automatically compensate, maintaining the preload constant and achieving "full life cycle positioning accuracy".

[0165] Working mechanism: When the operator applies an external force P (range of 3-15N) to the connecting arm 11, the axial displacement is converted into the rotational motion of the guide column 12, with a conversion efficiency η≥92% (conventional slider mechanism η≈78%). The steel ball 41 forms rolling friction between the raceway and the three V-grooves, with a friction coefficient μ=0.001-0.003 (conventional sliding structure μ=0.1-0.15). The snap ring assembly maintains the system rigidity K≥100N / mm (rigidity fluctuation <5% from no load to full load) by dynamically compensating for the gap of the steel ball 41.

[0166] Positioning control: When an external rotational torque is applied, the connecting arm 11 rotates relative to the base, and the steel ball 41 generates rolling displacement between the V-groove and the positioning guide groove.

[0167] The preload unit 3 maintains a stable contact stress on the steel ball 41 by precisely controlling the compression of the snap ring assembly.

[0168] When rotated to the target angle, the steel ball 41 falls into the positioning groove 41 at the same time to form a three-point contact positioning, and the contact surface produces an elastic deformation of 0.05-0.1mm.

[0169] Limiting unit: The guide ring block 441 is located on the base and is integrally die-cast. When folding and rolling, it is limited by the guide ring groove 44.

[0170] The rolling of steel balls 41 replaces traditional sliding friction, reducing the operating torque by more than 75%; the geometric fit between the V-groove and the ring positioning groove 41 forms a self-locking angle, realizing stepped positioning in stepless adjustment; the spring 33 sets provide stable preload compensation, ensuring positioning accuracy throughout the entire life cycle; the three-point contact stress distribution improves the load-bearing capacity, and the impact load resistance can reach 50 N·m.

[0171] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A rearview mirror adjustment device, characterized by, The folding module, the base unit, the pre-tightening unit and the rolling positioning unit are included. The base unit is connected to the vehicle body. The pre-tightening unit is used for limiting the installation of the folding module on the base unit. The rolling positioning unit is arranged at the joint of the folding module and the base unit. The folding module can rotate on the base unit through the rolling positioning unit.

2. A mirror adjustment device according to claim 1, wherein The folding module includes a connecting arm and a guide column, and the guide column is provided with a sleeving hole. The base unit includes a base, and the base is provided with a plug-in column. The folding module is sleeved on the plug-in column through the guide column. The rolling positioning unit includes an annular raceway arranged on the base and a rolling assembly. The rolling assembly includes a steel ball arranged on the annular raceway and an upper connecting groove arranged on the guide column. The steel ball is arranged in the upper connecting groove on one side and can be arranged in the annular raceway on the other side. The guide column can drive the steel ball to roll in the annular raceway through the upper connecting groove.

3. A mirror adjustment device according to claim 2, wherein The rolling positioning unit further includes a positioning mechanism, and the positioning mechanism includes a positioning groove arranged on the base.

4. A mirror adjustment device according to claim 3, wherein The positioning groove is arranged on the annular raceway.

5. A rear-view mirror adjustment device according to any one of claims 3 or 4, characterized in that The horizontal projection width of the positioning groove is greater than that of the annular raceway. The rolling positioning unit includes at least two rolling assemblies. The rolling assemblies are uniformly distributed on the annular raceway.

6. A mirror adjustment device according to claim 3, wherein Each rolling assembly corresponds to a positioning mechanism.

7. A mirror adjustment device as defined in claim 2, wherein The rolling positioning unit further includes a transition assembly. At least one transition assembly is arranged between adjacent rolling assemblies. Each transition assembly includes a transition groove arranged on the base. The horizontal projection width of the transition groove is greater than that of the annular raceway. The horizontal projection width of the transition groove is less than that of the positioning groove.

8. A rearview mirror adjustment device according to either one of claims 2 or 7, characterized in that The rearview mirror adjusting device further includes a limiting unit.

9. A rearview mirror assembly characterized by, The limiting unit includes a guide ring block arranged on the base and a guide ring groove arranged on the guide column.

10. A rearview mirror assembly according to claim 9, wherein, The guide column is sleeved on the guide ring block through the guide ring groove. The guide column includes a column body. The column body is provided with a sleeving hole. The sleeving hole includes a primary through hole, a secondary through hole and a tertiary through hole. The tertiary through hole has a larger inner diameter than the secondary through hole, and the secondary through hole has a larger inner diameter than the primary through hole. The tertiary through hole is arranged close to the base in the base unit. The rolling positioning unit is arranged between the tertiary through hole and the base. The base is provided with a mounting mechanism. The mounting mechanism includes a support block arranged on the side wall of the base. The end of the guide column is pressed against the support block. The upper end surface of the support block is an arc surface. The rearview mirror body is connected with the rearview mirror adjusting device. The rearview mirror adjusting device is connected with the vehicle body through a rearview mirror mounting plate. The base is connected with the rearview mirror mounting plate through a connecting unit. The connecting unit includes an assembly column arranged on the base. The assembly column is provided with an assembly hole. The base is connected with the rearview mirror mounting plate through a fastener.

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