Low resistance lift mechanism for a rearview mirror

Abstract

The utility model provides a rear -view mirror low resistance lifting mechanism, including the rotatory base that is realized with base rotatable connection through the pivot, and the folding base that is realized rotatable connection with rotatory base through the pivot, folding base is close to rotatory base under the thrust of clutch spring, rotatory base and folding base still are equipped with disc spring and lower wear ring between, folding base after losing clutch spring thrust, disc spring promotes lower wear ring to make rotatory base and folding base away from each other to reduce the rotation friction between both. The utility model has the advantages of can effectively reduce the rotation resistance, reduce the wind noise in the rotation unfolding to the place gap, reserve the cleaning space for the rotation structure gap in the folding state, the advantage that is convenient for maintenance and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a low-resistance lifting mechanism for rearview mirrors. Background Technology

[0002] Existing traditional rearview mirror modules include a base connected to the vehicle body or door, a rotating shaft fixedly connected to the base, and a rotating base and a folding base arranged sequentially from bottom to top, all fitted around the rotating shaft. The folding base contains a drive motor and components such as a gear ring and a pressure-holding spring fitted around the rotating shaft. The pressure-holding spring provides downward pressure to the folding base and rotating base, allowing the upper clutch slider at the lower end of the rotating base to engage and disengage with the lower clutch slider of the base at a fixed angle. This ensures that when the rearview mirror folds inward or outward due to external impact, the upper and lower clutch sliders can be offset by their inclined surfaces to achieve rotation, preventing the rearview mirror from breaking. When the rearview mirror is normally folded and unfolded, the motor drives the folding base to rotate relative to the rotating base. Due to the pressure of the pressure-holding spring, the folding base experiences significant resistance when rotating relative to the rotating base. Over time, dust and dirt can easily cause problems such as jamming during rotation. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a low-resistance lifting mechanism for rearview mirrors that can effectively reduce rotational resistance, reduce wind noise by minimizing gaps between rotating structures after rotation and unfolding into position, and reserve cleaning space for gaps between rotating structures in the folded state, thus facilitating maintenance.

[0004] To address the above problems, the following technical solution is provided: a low-resistance rearview mirror lifting mechanism, comprising a rotating base rotatably connected to a base via a pivot, and a folding base rotatably connected to the rotating base via a pivot. The folding base is in close contact with the rotating base under the thrust of a clutch spring. A disc spring and a lower wear-resistant ring are also provided between the rotating base and the folding base. After the folding base loses the thrust of the clutch spring, the disc spring pushes the lower wear-resistant ring to move the rotating base and the folding base away from each other to reduce the rotational friction between them.

[0005] The present invention is further configured such that the rotating base has a first positioning member arranged in a fan shape along its circumferential direction on the side facing the folding base, and the folding base has a second positioning member arranged in a fan shape along its circumferential direction and fitted with the first positioning member on the side facing the rotating base; when the rotating base and the folding base move away from each other, the first positioning member and the second positioning member disengage and provide rotational freedom between the rotating base and the folding base.

[0006] The present invention is further configured such that the first positioning member is convex and the second positioning member is concave.

[0007] The present invention is further configured such that the first positioning member has a first guide slope at both ends corresponding to the fan-shaped direction, and the second positioning member has a second guide slope at both ends corresponding to the fan-shaped direction; when the first positioning member and the second positioning member are engaged, the first guide slope and the second guide slope are in contact with each other or in a gap fit.

[0008] The present invention is further configured such that the first positioning member and the second positioning member are three groups or integer multiples of three, and are evenly distributed along the circumferential direction of the rotation axis.

[0009] The present invention is further configured such that the disc spring includes an inner ring and an outer ring with a height difference in the height direction, the inner ring abuts and supports the lower wear-resistant ring below the folding base, and the outer ring abuts and supports the rotating base; the outer ring is provided with an outer positioning groove that is adapted to the first positioning member to restrict the circumferential degree of freedom, the inner ring is provided with an inner positioning groove, and the lower surface of the lower wear-resistant ring is provided with an anti-rotation protrusion that fits into the inner positioning groove.

[0010] The present invention is further configured such that the number of outer positioning grooves and inner positioning grooves are equal; and the number of inner positioning grooves and anti-rotation protrusions are in a multiple relationship.

[0011] The present invention is further configured such that the lower wear-resistant ring is fixed to the rotating base in the circumferential direction by a disc spring, so that the folding base rotates relative to the lower wear-resistant ring after being raised.

[0012] The beneficial effects of this utility model are:

[0013] 1. During rotation, the motor drives the internal gear ring to reduce the clutch spring thrust, and then the disc spring pushes the lower wear ring to move the rotating base and the folding base away from each other to reduce rotational friction between them, reduce rotational resistance, and ensure the flexibility of rotation during folding; after unfolding, the folding base moves downward to eliminate gaps and reduce wind noise.

[0014] 2. Before the folding base is lifted, it is engaged with the first positioning component through the second positioning component to achieve circumferential connection and fixation between the two; when rotating, the folding base is lifted, the first positioning component and the second positioning component separate, and the two unlock circumferential degrees of freedom;

[0015] 3. Disc springs have the advantages of high compression ratio and stable elasticity. They also facilitate circumferential restraint of the lower wear ring, so that the lower wear ring can make good fit contact with the folding base when the folding base rotates.

[0016] 4. The lower wear ring is preferably made of brass, polytetrafluoroethylene, graphite, or an oil-impregnated sliding bearing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention in conjunction with a lens holder.

[0018] Figure 2 This is a three-dimensional structural diagram of the lens holder in the separated state of this utility model.

[0019] Figure 3 This is a schematic diagram of the full sectional three-dimensional structure of this utility model.

[0020] Figure 4 This is a first-view perspective three-dimensional structural diagram of the base, rotating base, and folding base of this utility model in their separated states.

[0021] Figure 5 This is a second-view three-dimensional structural diagram of the base, rotating base, and folding base of this utility model in their separated states.

[0022] Figure 6 This utility model Figure 4 A schematic diagram of the full sectional three-dimensional structure.

[0023] Figure 7 This utility model Figure 5 A schematic diagram of the full sectional three-dimensional structure.

[0024] Figure 8 This is a first-person perspective three-dimensional structural diagram of the present invention in the form of an explosion.

[0025] Figure 9 This is a two-dimensional structural diagram of the explosion from a second perspective of the present invention.

[0026] Figure 10 This is a partial cross-sectional view of the unfolded folding base of this utility model.

[0027] Figure 11 This is a second partial cross-sectional view of the unfolded folding base of this utility model.

[0028] Figure 12 This is a partial cross-sectional view of the rotating ring of this utility model.

[0029] Figure 13 This is a partial cross-sectional view of the rotating ring of this utility model.

[0030] Figure 14 This is a partial cross-sectional view of the first part of the rotating ring in the rising state of this utility model.

[0031] Figure 15 This is a partial cross-sectional view of the dial ring in the rising state of this utility model.

[0032] The labels in the diagram mean: 10-rotating shaft; 11-clutch spring; 12-motor; 13-gear ring; 14-shift ring; 141-shift block; 20-base; 30-rotating base; 31-first positioning component; 311-first guide slope; 40-folding base; 41-second positioning component; 411-second guide slope; 50-disc spring; 51-inner ring; 511-inner positioning groove; 52-outer ring; 521-outer positioning groove; 60-lower wear-resistant ring; 61-anti-rotation protrusion; 70-gap. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] refer to Figures 1 to 15 ,like Figures 1 to 15 The rearview mirror low-resistance lifting mechanism shown includes a rotating base 30 rotatably connected to a base 20 via a rotating shaft 10, and a folding base 40 rotatably connected to the rotating base 30 via a rotating shaft 10. The folding base 40 is in close contact with the rotating base 30 under the thrust of a clutch spring 11. A disc spring 50 and a lower wear-resistant ring 60 are also provided between the rotating base 30 and the folding base 40. After the folding base 40 loses the thrust of the clutch spring 11, the disc spring 50 pushes the lower wear-resistant ring 60 to move the rotating base 30 and the folding base 40 away from each other to reduce the rotational friction between them.

[0035] In the above structure, when rotating, the motor 12 drives the internal gear ring 13 to reduce the thrust of the clutch spring 11, and then the disc spring 50 pushes the wear-resistant ring 60 to make the rotating base 30 and the folding base 40 move away from each other to reduce the rotational friction between them, reduce the rotational resistance, and ensure the flexibility of rotation when folding; after unfolding, the folding base 40 moves downward to eliminate the gap 70 and reduce wind noise.

[0036] In this embodiment, the rotating base 30 has a first positioning member 31 arranged in a fan shape along its circumferential direction on the side facing the folding base 40, and the folding base 40 has a second positioning member 41 arranged in a fan shape along its circumferential direction and fitted with the first positioning member 31 on the side facing the rotating base 30. When the rotating base 30 and the folding base 40 move away from each other, the first positioning member 31 and the second positioning member 41 disengage and provide rotational freedom between the rotating base 30 and the folding base 40.

[0037] In the above structure, before the folding base 40 is lifted, it is engaged with the first positioning member 31 through the second positioning member 41 to achieve circumferential connection and fixation between the two; when rotating, the folding base 40 is lifted, the first positioning member 31 and the second positioning member 41 are separated, and the two unlock circumferential degrees of freedom.

[0038] In this embodiment, the first positioning member 31 is convex, and the second positioning member 41 is concave.

[0039] In the above structure, the first positioning member 31 can be recessed and the second positioning member 41 can be protruded as needed.

[0040] In this embodiment, the first positioning member 31 is provided with a first guide slope 311 at both ends of the fan-shaped direction, and the second positioning member 41 is provided with a second guide slope 411 at both ends of the fan-shaped direction; when the first positioning member 31 and the second positioning member 41 are engaged, the first guide slope 311 and the second guide slope 411 are in contact with each other or in a gap fit.

[0041] The above structure facilitates the alignment and fitting of the two parts, resulting in excellent positioning.

[0042] In this embodiment, the first positioning member 31 and the second positioning member 41 are three groups or integer multiples of three, and are evenly distributed along the circumferential direction of the rotating shaft 10.

[0043] In the above structure, the number of the first positioning member 31 and the second positioning member 41 is preferably three groups, with each group arranged at a 120-degree interval from each other.

[0044] In this embodiment, the disc spring 50 includes an inner ring 51 and an outer ring 52 with a height difference. The inner ring 51 abuts and supports the lower wear-resistant ring 60 below the folding base 40, and the outer ring 52 abuts and supports the rotating base 30. The outer ring 52 is provided with an outer positioning groove 521 that is adapted to the first positioning member 31 to restrict the circumferential degree of freedom. The inner ring 51 is provided with an inner positioning groove 511. The lower surface of the lower wear-resistant ring 60 is provided with an anti-rotation protrusion 61 that fits into the inner positioning groove 511.

[0045] In the above structure, the disc spring 50 has the advantages of high compression ratio and stable elasticity. It also facilitates circumferential constraint on the lower wear ring 60, so that the lower wear ring 60 can make good fit contact with the folding base 40 when the folding base 40 rotates.

[0046] In this embodiment, the outer positioning groove 521 and the inner positioning groove 511 are arranged in equal numbers; the number of the inner positioning groove 511 and the anti-rotation protrusion 61 are in a multiple relationship.

[0047] In this embodiment, the lower wear-resistant ring 60 is fixed to the rotating base 30 in the circumferential direction by the disc spring 50, so that the folding base 40 can rotate relative to the lower wear-resistant ring 60 after being raised.

[0048] In the above structure, the lower wear-resistant ring 60 is preferably made of brass, polytetrafluoroethylene, graphite, or an oil-impregnated sliding bearing.

[0049] In this embodiment, the motor 12 is mounted on the folding base 40. By driving the gear ring 13, the gear ring 13 moves the dial ring 14, so that the dial block 141 of the dial ring 14 moves upward along the rotating base 30 to leave upward space for the folding base 40. Then, the folding base 40 is lifted up under the elastic force of the disc spring 50.

[0050] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A low-resistance rearview mirror lifting mechanism, comprising a rotating base rotatably connected to a base via a pivot, and a folding base rotatably connected to the rotating base via a pivot, wherein the folding base is in close contact with the rotating base under the thrust of a clutch spring, characterized in that: A disc spring and a lower wear-resistant ring are also provided between the rotating base and the folding base. After the folding base loses the clutch spring thrust, the disc spring pushes the lower wear-resistant ring to move the rotating base and the folding base away from each other to reduce the rotational friction between them.

2. The low-resistance lifting mechanism for a rearview mirror according to claim 1, characterized in that: The rotating base has a first positioning element arranged in a fan shape along its circumferential direction on the side facing the folding base, and the folding base has a second positioning element arranged in a fan shape along its circumferential direction and fitted with the first positioning element on the side facing the rotating base. When the rotating base and the folding base move away from each other, the first positioning element and the second positioning element disengage and provide rotational freedom between the rotating base and the folding base.

3. The low-resistance lifting mechanism for a rearview mirror according to claim 2, characterized in that: The first positioning member is convex, and the second positioning member is concave.

4. The low-resistance lifting mechanism for a rearview mirror according to claim 3, characterized in that: The first positioning member has a first guide slope at both ends corresponding to the fan-shaped direction, and the second positioning member has a second guide slope at both ends corresponding to the fan-shaped direction; when the first positioning member and the second positioning member are engaged, the first guide slope and the second guide slope are in contact with each other or in a gap fit.

5. A low-resistance rearview mirror lifting mechanism according to claim 2, 3, or 4, characterized in that: The first positioning element and the second positioning element are in three groups or multiples of three, and are evenly distributed along the circumferential direction of the rotation axis.

6. The low-resistance lifting mechanism for a rearview mirror according to claim 2, characterized in that: The disc spring includes an inner ring and an outer ring with a height difference. The inner ring is supported by a lower wear-resistant ring below the folding base, and the outer ring is supported by a rotating base. The outer ring is provided with an outer positioning groove that is adapted to the first positioning member to restrict the circumferential degree of freedom. The inner ring is provided with an inner positioning groove. The lower surface of the lower wear-resistant ring is provided with an anti-rotation protrusion that fits into the inner positioning groove.

7. A low-resistance rearview mirror lifting mechanism according to claim 6, characterized in that: The number of outer positioning grooves and inner positioning grooves is equal; the number of inner positioning grooves and anti-rotation protrusions is a multiple of each other.

8. A low-resistance rearview mirror lifting mechanism according to claim 6 or 7, characterized in that: The lower wear-resistant ring is fixed to the rotating base in the circumferential direction by a disc spring, so that the folding base can rotate relative to the lower wear-resistant ring after being raised.

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