Vehicle-mounted multimedia rotation driving mechanism

Abstract

A vehicle-mounted multimedia rotation driving mechanism comprises a shell, a driving shaft and a rotation driving assembly, the shell is provided with an inner cavity, the driving shaft comprises a first shaft section rotationally connected to the inner cavity of the shell and a second shaft section extending out of the shell, the output end of the rotation driving assembly acts on the second shaft section to drive the driving shaft to rotate, and the second shaft section is provided with a damper. The damper comprises an elastic piece and a friction piece, a limiting part which acts on the friction piece to achieve circumferential limiting of the friction piece is embedded in the shell, and the elastic piece acts on the friction piece to push the friction piece to abut against the second shaft section. According to the scheme, the elastic piece and the friction piece are arranged on the second shaft section, the friction piece achieves circumferential limiting relative to the shell through the limiting part, the elastic piece acts on the friction piece to push the friction piece to abut against the second shaft section, and therefore it is guaranteed that the second shaft section can bear large damping force all the time; and after rotating to a required angle, the driving shaft can be kept stable and is not easy to deflect, so that the use experience of a user is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive multimedia accessories, and more particularly to a vehicle-mounted multimedia rotary drive mechanism. Background Art

[0002] In recent years, with the continuous transformation of the automotive industry towards electrification, consumers' functional requirements for automobiles have also been continuously enriched. More and more vehicle models are equipped with multimedia devices such as displays, audio systems, and lighting. The popularization of these multimedia devices has not only changed people's travel modes but also made the life with a car more colorful.

[0003] To improve the user experience, multimedia devices are often designed to be rotatable and adjustable. In the prior art, the rotation function of multimedia devices is generally achieved by a motor cooperating with a speed reducer. However, it is found in actual use that due to the bumps during vehicle driving, the multimedia device is often not stable enough after rotation, and is prone to looseness and deflection, affecting the user experience. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the multimedia device in the prior art is often not stable enough after rotation, is prone to looseness and skew, and affects the user experience.

[0005] To solve the above problems, the utility model provides a vehicle-mounted multimedia rotary drive mechanism, which includes a housing, a drive shaft, and a rotary drive assembly. The housing is provided with an inner cavity. The drive shaft includes a first shaft section rotatably connected to the inner cavity of the housing and a second shaft section extending out of the housing. The output end of the rotary drive assembly acts on the second shaft section to drive the rotation of the drive shaft. The second shaft section is provided with a damper, and the damper includes an elastic member and a friction member. The housing is embedded with a limiting portion that acts on the friction member to realize the circumferential limitation of the friction member. The elastic member acts on the friction member to push the friction member against the second shaft section.

[0006] The above solution drives the drive shaft to rotate through the rotary drive assembly, and the first shaft section of the drive shaft is used for docking with the device to be driven, so as to realize the rotation function of the device to be driven. At the same time, compared with the prior art, the above solution further sets an elastic member and a friction member on the second shaft section of the drive shaft. Among them, the friction member realizes the circumferential limitation relative to the housing through the limiting portion, and the elastic member acts on the friction member to push the friction member against the second shaft section, so as to ensure that the second shaft section can always receive a large damping force, and can remain stable and not prone to deflection after the drive shaft rotates to the required angle, effectively improving the user experience.

[0007] In an improved solution, the friction member is annular and sleeved on the second shaft section. The outer peripheral side of the friction member is provided with protruding lugs, and the limiting portion is a clamping groove. The lugs are clamped into the clamping groove, so as to realize the stable circumferential limit of the friction member relative to the housing through the clamping cooperation of the lugs and the clamping groove, and the assembly is simple and convenient.

[0008] In an improved solution, the friction member has an annular sheet-like structure. The second shaft section is provided with a protruding step surface. The elastic member is a spring sleeved on the second shaft section. The spring is used to push the friction member against the step surface, so as to form an axial extrusion between the friction member and the step surface, and the friction member can effectively provide a rotational damping force to the second shaft section.

[0009] In an improved solution, the friction member has an annular cylindrical structure. The side peripheral wall of the friction member is provided with a plurality of through grooves distributed circumferentially. The through grooves penetrate the side peripheral wall of the friction member along the direction parallel to the axis of the driving shaft. The elastic member is a spring and is sleeved on the outer peripheral side of the friction member. The spring is used to tighten the friction member inward to push the friction member against the second shaft section, so as to form a radial extrusion between the friction member and the second shaft section, and the friction member can effectively provide a rotational damping force to the second shaft section.

[0010] In an improved solution, the rotary drive assembly includes a motor and a reducer. The motor is connected to the input end of the reducer, and the output end of the reducer is connected to the second shaft section.

[0011] In an improved solution, the reducer includes a first-stage worm connected to the output end of the motor, a second-stage worm rotatably connected to the inner cavity of the housing, a first-stage worm gear connected to the second-stage worm and meshing with the first-stage worm, and a second-stage worm gear connected to the second shaft section and meshing with the second-stage worm. The structure is compact and the operation is stable.

[0012] In an improved solution, a sensor for detecting the rotation angle of the driving shaft is embedded in the housing, so as to facilitate the real-time feedback of the rotation angle of the driving shaft.

[0013] In an improved solution, the sensor is a sliding rheostat with good reliability.

[0014] In an improved solution, the first shaft section is provided with a spline, so as to better provide a rotational torque for the device to be driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of a vehicle-mounted multimedia rotary drive mechanism;

[0016] Figure 2 It is a top view schematic diagram of a vehicle-mounted multimedia rotary drive mechanism;

[0017] Figure 3 It is a schematic cross-sectional view along the Figure 2 A - A section line in the figure;

[0018] Figure 4 It is a schematic view of a vehicle-mounted multimedia rotary drive mechanism with the housing removed;

[0019] Figure 5 It is a schematic view of the cooperation between the drive shaft and the damper of a vehicle-mounted multimedia rotary drive mechanism;

[0020] Figure 6 It is along Figure 2 Another schematic cross-sectional view along the A - A section line in the figure;

[0021] Figure 7 It is a schematic view of the cooperation between the drive shaft and the damper of another embodiment of a vehicle-mounted multimedia rotary drive mechanism.

[0022] Explanation of reference numerals,

[0023] 1. Housing; 11. Inner cavity; 12. Card slot; 2. Drive shaft; 21. First shaft section; 22. Second shaft section; 23. Step surface; 3. Damper; 31. Friction member; 311. Latching ear; 312. Through slot; 32. Elastic member; 4. Motor; 41. First-stage worm; 42. First-stage worm gear; 43. Second-stage worm; 44. Second-stage worm gear; 5. Slide rheostat. Detailed implementation manners

[0024] Those skilled in the art should understand that the following implementation manners are only used to explain the technical principle of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0025] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figures 1-5 , a vehicle-mounted multimedia rotation driving mechanism provided by an embodiment of the present utility model includes a housing 1, a driving shaft 2 and a rotation driving assembly. The housing 1 is provided with an inner cavity 11. The driving shaft 2 includes a first shaft section 21 rotatably connected to the inner cavity 11 of the housing 1 and a second shaft section 22 extending outside the housing 1. The output end of the rotation driving assembly acts on the second shaft section 22 to drive the rotation of the driving shaft 2. A damper 3 is provided on the second shaft section 22. The damper 3 includes an elastic member 32 and a friction member 31. A limiting portion for circumferentially limiting the friction member 31 is embedded in the housing 1, and the elastic member 32 acts on the friction member 31 to push the friction member 31 against the second shaft section 22.

[0029] In the above solution, the rotation driving assembly drives the driving shaft 2 to rotate, and the first shaft section 21 of the driving shaft 2 is used for docking with the device to be driven, so as to realize the rotation function of the device to be driven. At the same time, compared with the prior art, the above solution further sets an elastic member 32 and a friction member 31 on the second shaft section 22 of the driving shaft 2. The friction member 31 realizes circumferential limitation relative to the housing 1 through the limiting portion, and the elastic member 32 acts on the friction member 31 to push the friction member 31 against the second shaft section 22, so as to ensure that the second shaft section 22 can always receive a large damping force, and can maintain stability and is not easy to deflect when the driving shaft 2 rotates to the required angle, effectively improving the user experience.

[0030] In this embodiment, the friction member 31 is annular and sleeved on the second shaft section 22. A protruding lug 311 is provided on the outer peripheral side of the friction member 31. The limiting portion is a clamping groove 12. The lug 311 is clamped into the clamping groove 12, so as to realize stable circumferential limitation of the friction member 31 relative to the housing 1 through the clamping fit between the lug 311 and the clamping groove 12, and the assembly is simple and convenient. It should be understood that it is also possible to provide a clamping groove 12 on the outer peripheral side of the friction member 31, and the limiting portion is a protruding lug 311, which belongs to the same design concept.

[0031] Such as Figure 3 、Figure 4 and Figure 5 As shown in Figure 5 , in this embodiment, the friction member 31 has an annular cylindrical structure. A plurality of through grooves 312 are provided on the circumferential side wall of the friction member 31 and are distributed circumferentially. The through grooves 312 penetrate the circumferential side wall of the friction member 31 along a direction parallel to the axis of the drive shaft 2. The elastic member 32 is a spring and is sleeved on the outer circumferential side of the friction member 31. The spring is used to tighten the friction member 31 inward to push the friction member 31 against the second shaft section 22, so that a radial extrusion is formed between the friction member 31 and the second shaft section 22, and the friction member 31 can effectively provide a rotational damping force to the second shaft section 22. The number of the through grooves 312 is preferably two and is symmetrically distributed with respect to the axis of the second shaft section 22, so that the friction member 31 forms a split structure, which is convenient for the spring to tighten inward more effectively and ensures that the friction member 31 provides a more stable rotational damping force to the second shaft section 22.

[0032] Of course, the friction member 31 can also be in other forms, such as Figure 6 and Figure 7 As shown in Figure 7 , in another embodiment, the friction member 31 has an annular sheet-like structure. The second shaft section 22 is provided with a protruding stepped surface 23. The elastic member 32 is a spring sleeved on the second shaft section 22. The spring is used to push the friction member 31 against the stepped surface 23, so that an axial extrusion is formed between the friction member 31 and the stepped surface 23, and the friction member 31 can effectively provide a rotational damping force to the second shaft section 22.

[0033] In this embodiment, the rotary drive assembly includes a motor 4 and a speed reducer. The motor 4 is connected to the input end of the speed reducer, and the output end of the speed reducer is connected to the second shaft section 22.

[0034] More specifically, the speed reducer includes a first-stage worm 41 connected to the output end of the motor 4, a second-stage worm 43 rotatably connected to the inner cavity 11 of the housing 1, a first-stage worm gear 42 connected to the second-stage worm 43 and meshing with the first-stage worm 41, and a second-stage worm gear 44 connected to the second shaft section 22 and meshing with the second-stage worm 43. The structure is compact and the operation is stable.

[0035] As an improvement to this embodiment, a sensor for detecting the rotation angle of the drive shaft 2 is embedded in the housing 1, so as to facilitate real-time feedback of the rotation angle of the drive shaft 2. More specifically, the sensor is a slide rheostat 5. When the second shaft section 22 rotates, the resistance value of the slide rheostat 5 changes, and the corresponding electrical signal changes, and the reliability is good.

[0036] In this embodiment, the first shaft section 21 is provided with a spline, so as to better provide a rotational torque for the device to be driven.

[0037] It should be noted that in the description of the present application, terms indicating directions or positional relationships such as "inner" and "outer" are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application; all directional indications (such as up, down, left, right, front, back, inner, outer) are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In the description of the present application, the description referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vehicle-mounted multimedia rotation drive mechanism, characterized in that: The invention comprises a housing (1), a drive shaft (2) and a rotary drive assembly, wherein the housing (1) is provided with an inner cavity (11), the drive shaft (2) comprises a first shaft section (21) extending out of the housing (1) and a second shaft section (22) rotatably connected to the inner cavity (11) of the housing (1), the output end of the rotary drive assembly acts on the second shaft section (22) to drive the rotation of the drive shaft (2), the second shaft section (22) is provided with a damper (3), the damper (3) comprises an elastic member (32) and a friction member (31), a limiting portion is embedded in the housing (1) and acts on the friction member (31) to achieve circumferential limiting of the friction member (31), the elastic member (32) acts on the friction member (31) to push the friction member (31) to abut against the second shaft section (22).

2. The vehicle-mounted multimedia rotation drive mechanism according to claim 1, characterized in that: The friction member (31) is annular and sleeved on the second shaft section (22); a protruding ear (311) is provided on the outer peripheral side of the friction member (31); the limiting portion is a slot (12), and the ear (311) is snap-fitted to the slot (12).

3. The vehicle-mounted multimedia rotation drive mechanism according to claim 1 or 2, characterized in that: The friction member (31) is an annular sheet structure; the second shaft section (22) is provided with a raised step surface (23); the elastic member (32) is a spring sleeved on the second shaft section (22); the spring is used to push the friction member (31) to abut against the step surface (23).

4. The vehicle-mounted multimedia rotation drive mechanism according to claim 1 or 2, characterized in that: The friction member (31) is an annular cylindrical structure. The side circumferential wall of the friction member (31) is provided with a plurality of through grooves (312) distributed along the circumferential direction. The through grooves (312) penetrate the side circumferential wall of the friction member (31) in a direction parallel to the axis of the drive shaft (2). The elastic member (32) is a spring and is sleeved on the outer circumferential side of the friction member (31). The spring is used to tighten the friction member (31) inwardly to push the friction member (31) to abut against the second shaft section (22).

5. The vehicle-mounted multimedia rotation drive mechanism according to claim 1, characterized in that: The rotary drive assembly comprises a motor (4) and a reducer, wherein the motor (4) is connected to an input end of the reducer, and an output end of the reducer is connected to the second shaft section (22).

6. The vehicle-mounted multimedia rotation drive mechanism according to claim 5, characterized in that: The reducer comprises a primary worm (41) connected to the output end of the motor (4), a secondary worm (43) rotatably connected to the inner cavity (11) of the housing (1), a primary worm wheel (42) connected to the secondary worm (43) and meshing with the primary worm (41), and a secondary worm wheel (44) connected to the second shaft section (22) and meshing with the secondary worm (43).

7. The vehicle-mounted multimedia rotation drive mechanism according to claim 1, characterized in that: The housing (1) is embedded with a sensor for detecting the rotation angle of the drive shaft (2).

8. The vehicle-mounted multimedia rotation drive mechanism according to claim 7, characterized in that: The sensor is a sliding rheostat (5).

9. The vehicle-mounted multimedia rotation drive mechanism according to claim 1, characterized in that: The first shaft section (21) is provided with a spline.

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