Screen rotating mechanism
By designing a screen rotation mechanism including arc track grooves and four-stage transmission, the problem of single adjustment of the vehicle handrail screen is solved, and the multi-directional rotation and stability of the screen are improved.
Patent Information
- Application Number
- CN202311087131.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-28
- Publication Date
- 2025-02-28
AI Technical Summary
The adjustment method of existing vehicle handrail screens is relatively single, and multi-directional flexible adjustment cannot be achieved.
A screen rotation mechanism is designed, including a base, a transmission mechanism and a screen. The rotation of the screen around the virtual rotation axis is realized through the arc track groove and the rotation assembly. Combined with the four-stage transmission of the gear and screw assembly, the rotational movement of the motor is converted into the circular motion of the screen.
Multi-directional rotation of the screen is achieved, the problem of single adjustment in the prior art is solved, and the flexibility and stability of the screen is improved.
Smart Images
Figure CN119527181A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle, and more particularly to a screen rotating mechanism. Background Art
[0002] Currently, the adjustment methods of the armrest screen are relatively simple, such as: 1) the screen is directly integrated into the seat armrest, and the screen is adjusted with the movement of the armrest, and cannot be adjusted by itself, and the position is relatively fixed; 2) the screen and the slide rail are integrated into the armrest, and the screen is driven to move back and forth through the movement of the motor of the slide rail, and this adjustment is simple. Summary of the invention
[0003] In order to solve the problem that the armrest screen adjustment in the above-mentioned prior art is relatively simple, the present invention provides a screen rotation mechanism.
[0004] According to the screen rotation mechanism of the present invention, it includes a base, a transmission mechanism and a screen, wherein the base has an arc trajectory groove, the center of the arc trajectory groove defines a virtual rotation axis, the transmission mechanism includes a bracket, the bracket is connected to the arc trajectory groove through a rotating component, and the screen is fixedly mounted on the bracket to rotate around the rotation axis.
[0005] Preferably, the bracket has a leg with a mounting hole formed at the end of the leg, and the rotating component passing through the mounting hole is accommodated in the circular arc track groove and rolls, so that the bracket and the screen connected thereto rotate along the path defined by the circular arc track groove.
[0006] Preferably, two mounting holes spaced apart from each other are formed at the ends of the legs.
[0007] Preferably, the bracket has two opposite legs, and the bracket rotates on the base through four rotating components.
[0008] Preferably, the transmission mechanism further comprises an output gear fixedly mounted on the bracket, and the rotation center of the output gear is the rotary axis.
[0009] Preferably, the transmission mechanism also includes an input gear, a double gear, a screw assembly and a rack, wherein the screw assembly includes a screw and a transmission gear fixed to the screw and rotating coaxially with the screw, the double gear is meshed with the input gear and the transmission gear at the same time, and the rack connects the screw and the output gear.
[0010] Preferably, the rotational motion of the motor is converted into translational reciprocating motion of the lead screw and the rack through the input gear, the duplex gear and the transmission gear, and the linear motion is converted into circular motion of the screen around the virtual rotation axis through the output gear.
[0011] Preferably, the rack includes an internal thread arranged inside and a tooth plate arranged on the outer surface, the internal thread is meshed with the thread of the screw rod, and the tooth plate is meshed with the output gear.
[0012] Preferably, the duplex gear comprises a large tooth meshing with the input gear and a small tooth meshing with the transmission gear; the diameter of the input gear is smaller than the diameter of the large tooth; and / or the diameter of the small tooth is smaller than the diameter of the transmission gear.
[0013] Preferably, the screen rotation mechanism further comprises a gear box, which is fixedly mounted on the base and connected to the transmission mechanism to drive the transmission mechanism.
[0014] According to the screen rotation mechanism of the present invention, the center of the circular arc track groove of the base defines a virtual rotation axis, and the screen rotates around the rotation axis, so that the screen without a physical rotation axis can achieve fixed-axis rotation, solving the problem of single adjustment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of a screen rotation mechanism according to a preferred embodiment of the present invention.
[0016] Figure 2 Show Figure 1 The rotation state of the screen of the screen rotation mechanism.
[0017] Figure 3 yes Figure 2 Schematic diagram of the structure with the screen at an elevation angle of 30°.
[0018] Figure 4 yes Figure 2 Schematic diagram of the structure with the screen at an elevation angle of 60°.
[0019] Figure 5 yes Figure 1 Schematic diagram of the structure of the base of the screen rotation mechanism.
[0020] Figure 6 The gearbox is shown in Figure 5 Installation on the base.
[0021] Figure 7 yes Figure 1 A schematic structural diagram of the transmission mechanism of the screen rotation mechanism.
[0022] Figure 8 The screen shows Figure 7 Installation on the bracket of the transmission mechanism.
[0023] Fig. 9 yes Figure 7 The transmission mechanism bracket is installed on Figure 5 Schematic diagram of the structure on the base.
[0024] Fig.10 yes Fig. 9 Side view of.
[0025] Fig.11 Show Figure 7 The output gear is installed on the bracket.
[0026] Fig.12 Show Figure 7 The rack emerges from the gearbox.
[0027] Fig.13 Show Figure 7 The transmission mechanism has four-stage transmission.
[0028] Fig.14 Show Fig.13 The first, second and third transmission stages.
[0029] Fig.15 Show Fig.13 The fourth gear stage.
[0030] Fig.16 Corresponds to Figure 2 The transmission mechanism is shown.
[0031] Fig.17 Corresponds to Figure 3 The transmission mechanism is shown with the screen at an elevation angle of 30°.
[0032] Fig.18 Corresponds to Figure 4 The transmission mechanism is shown with the screen at an elevation angle of 60°.
[0033] Fig.19 Corresponds to Fig. 9 The circlip is shown assembled between the bracket and the base.
[0034] Fig. 20 Corresponds to Figure 2 The clip is shown with the screen at 0° elevation.
[0035] Fig.21 Corresponds to Figure 3 The clip is shown with the screen at a 30° elevation angle.
[0036] Fig. 22 Corresponds to Figure 4 The clip is shown with the screen at a 60° elevation angle. DETAILED DESCRIPTION
[0037] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.
[0038] like Figure 1As shown, the screen rotation mechanism according to a preferred embodiment of the present invention includes a base 1, a gear box 2, a transmission mechanism 3 and a screen 4, wherein the base 1 is fixedly mounted on the vehicle body and defines a virtual rotation axis 11, the gear box 2 is fixedly mounted on the base 1 and connected to the transmission mechanism 3 to drive the transmission mechanism 3, and the screen 4 is fixedly mounted on the transmission mechanism 3 to rotate around the rotation axis 11.
[0039] like Figure 2 As shown, in the initial state, the screen 4 is placed horizontally, that is, it forms an angle of 0° with the horizontal plane. As required, the screen 4 can change its angle around the rotation axis 11 within the range of 0-60°, for example, rotating to Figure 3 30° and Figure 4 It should be understood that the angle between the screen 4 and the horizontal plane is not limited to the range of 0-60 degrees and can be adjusted as needed.
[0040] like Figure 5 As shown, the base 1 is a box-shaped structure with an open top, which has opposite side walls 12, and a circular arc track groove 121 is formed on the side wall 12. In this embodiment, the track groove 121 is a guide rail. It should be understood that the track groove 121 can also be a structure such as a slide rail or a guide groove.
[0041] like Figure 6 As shown, the gear box 2 is mounted on the base 1 from above and fixed in the base 1 by, for example, screws.
[0042] like Figure 7 As shown, the transmission mechanism 3 includes a bracket 31, as shown in FIG. Figure 8 As shown, the screen 4 is fixed to the bracket 31 by, for example, screws. It should be understood that the screw installation here is only an example and not a limitation, and it is also feasible to install the screen 4 to the bracket 31 by other means. Fig. 9 As shown, the bracket 31 is connected to the arc track groove 121 through the rotating assembly 32. Specifically, as Figure 8 As shown, the bracket 31 has a connecting plate 311 and two legs 312, wherein the two legs 312 are fan-shaped plates extending vertically from opposite ends of the connecting plate 311, that is, gradually spreading and extending from the connecting plate 311. It should be understood that the vertical extension here is only an example and not a limitation, and it is also feasible for the legs 312 to form other angles with the connecting plate 311. Two mounting holes 312a spaced apart from each other are formed at the end of each leg 312 away from the connecting plate 311. It should be understood that the number of mounting holes here is only an example and not a limitation, and the provision of multiple mounting holes is feasible. As shown in FIG. Fig. 9 As shown, the four rotating components 32 passing through the mounting hole 312a are accommodated in the arc track groove 121 and roll, so that the bracket 31 and the screen 4 connected thereto (see Figure 8) rotates along the path defined by the arc track groove 121. Fig.10 As shown, the center of the arc track groove 121 defines the above-mentioned rotary axis 11 as a fixed axis without a physical axis, and the rotating component 32 moves in the arc track groove 121 along the arrow direction shown in the figure, so that the bracket 31 and the screen 4 connected thereto (see Figure 8 ) rotates on the base 1 with a rotation radius r. By adjusting the curvature of the circular arc trajectory groove 121, that is, changing the rotation radius r, the rotation angle of the screen 4 can be finally adjusted. Among them, in addition to providing axial positioning, the rotating component 32 may also include a gasket for eliminating gaps and a corrugated gasket for providing a preload to prevent system jitter. Its specific structure is a common setting in the field and will not be repeated here. In this way, the stability of the screen rotation mechanism according to the present invention is improved, and the screen 4 mounted on the bracket 31 is relatively stable due to the reduction of mechanical jitter. In this embodiment, the rotating component 32 is a roller assembly. It should be understood that the rotating component 32 can also be a structure such as a bearing.
[0043] like Figure 7 As shown, the transmission mechanism 3 also includes an output gear 33, such as Fig.11 As shown, the output gear 33 is fixed to the connecting plate 311 of the bracket 31 by, for example, screws. In particular, the rotation center of the output gear 33 is also the rotation axis of the bracket 31, which is also the rotation axis of the screen 4, that is, the rotation axis 11 (see Fig.10 ).
[0044] like Figure 7 As shown, the transmission mechanism 3 also includes an input gear 34, a double gear 35, a screw assembly 36 and a rack 37, wherein the double gear 35 is meshed with the input gear 34 and the screw assembly 36 at the same time, and the rack 37 connects the screw assembly 36 and the output gear 33. Specifically, the screw assembly 36 includes a screw 361 and a transmission gear 362 fixed to the screw 361 and coaxially arranged with the screw 361, and the double gear 35 includes a large tooth meshed with the input gear 34 and a small tooth meshed with the transmission gear 362, the diameter of the input gear 34 is smaller than the diameter of the large tooth, the angular velocity of the large tooth and the small tooth is equal, the diameter of the large tooth is larger than the diameter of the small tooth, and the diameter of the small tooth is smaller than the diameter of the transmission gear 362. As shown in FIG. Fig.12 As shown, the input gear 34 , the double gear 35 and the screw assembly 36 are accommodated in the gear box 2 and driven by the motor, and the rack 37 is exposed to drive the output gear 33 .
[0045] like Fig.13 As shown, the transmission mechanism 3 includes four-stage transmission A, B, C, and D.
[0046] like Figure 7 , Fig.13 and Fig.14As shown, the motor is powered on and rotates, driving the input gear 34 to rotate. Since the input gear 34 is meshed with the double gear 35, the double gear 35 is driven to rotate. The transmission between the input gear 34 and the double gear 35 is reduced by one stage, which is also called the first gear pair reduction stage A.
[0047] like Figure 7 , Fig.13 and Fig.14 As shown, since the double gear 35 is meshed with the transmission gear 362, the rotation of the double gear 35 drives the transmission gear 362 to rotate. The transmission between the double gear 35 and the screw assembly 36 performs a two-stage reduction, also known as the second-stage gear pair reduction stage B.
[0048] like Figure 7 , Fig.13 and Fig.14 As shown, since the rack 37 includes an internal thread disposed therein, the internal thread is threadedly engaged with the screw rod 361, that is, the nut is threadedly engaged with the screw rod 361, so the circular motion of the screw rod 361 is converted into the translational motion of the rack 37. The transmission between the screw rod 361 and the rack 37 here is reduced in three stages, also referred to as the third stage screw rod nut reduction stage C.
[0049] like Figure 7 , Fig.13 and Fig.15 As shown, since the rack 37 also includes a toothed plate provided on the outer surface, the toothed plate is engaged with the output gear 33, so the movement of the rack 37 drives the output gear 33 to rotate, so that the bracket 31 and the screen 4 connected thereto (see Fig. 9 ) around a virtual rotary axis 11 (see Fig.10 ) performs corresponding rotational motion, for example, the output gear 33 rotates counterclockwise, and the screen rotates out accordingly. The transmission between the rack 37 and the output gear 33 here performs four-stage reduction, also known as the fourth-stage rack and pinion reduction stage D.
[0050] It should be understood that although the screen rotation mechanism according to the present invention is not self-locking, it has a certain hovering resistance, which is mainly derived from the threaded engagement between the screw rod 361 and the rack 37 and the end face friction of the screw rod assembly 36.
[0051] In this way, through the four-stage transmission of the transmission mechanism 3, the rotational motion of the motor is converted into the translational reciprocating motion of the rack 37, the rack 37 drives the output gear 33 to rotate, and finally drives the bracket 31 to rotate along the fixed axis (that is, the rotating axis 11 defined by the arc trajectory groove 121), and the screen 4 rotates with the bracket 31.
[0052] like Fig.16As shown, in the initial state, the screen 4 is placed horizontally, that is, it forms an angle of 0° with the horizontal plane, and the rack 37 is located near the transmission gear 362. The rack 37 is driven to the middle of the screw assembly 36 in a direction away from the transmission gear 362, and the bracket 31 and the screen 4 rotate counterclockwise around the rotating shaft 11 synchronously. The screen 4 rotates to Fig.17 The rack 37 is driven to a position away from the transmission gear 362, and the bracket 31 and the screen 4 continue to rotate counterclockwise around the rotating shaft 11 synchronously. The screen 4 is rotated to Fig.18 The 60° position is shown.
[0053] like Fig.19 As shown, the transmission mechanism 3 also includes a torsion spring 38, which is connected between the base 1 and the bracket 31 to provide a pre-tightening force to the bracket 31. Specifically, a torsion spring installation shaft 13 is installed on the base 1, and the ring portion of the torsion spring 38 is sleeved on the torsion spring installation shaft 13 for radial limiting installation. In addition, the first free end 381 of the torsion spring 38 is inserted into the base 1 for installation, and the second free end 382 of the torsion spring 38 is inserted into the bracket 31 for installation. In particular, a slot 312b is provided in the middle of each leg 312, and the second free end 382 of the torsion spring 38 is accommodated in the slot 312 for movement. With the help of the slot 312b, during the rotation process of the bracket 31, the torsion spring 38 can provide a larger pre-tightening force without interference.
[0054] like Fig. 20 As shown, in the initial 0° state, the second free end 382 of the torsion spring 38 is located at the lower position of the slot 312b. Fig.21 When the bracket 31 is at the 30° position shown in FIG. 1 , the second free end 382 of the torsion spring 38 is located at the high position of the slot 312b. Fig. 22 In the 60° position shown, the second free end 382 of the torsion spring 38 is again located at the lower position of the slot 312b.
[0055] In this way, the torsion spring 38 has been twisted to a certain angle when installed, and begins to generate preload. When the screen 4 is retracted and rotated, the torsion angle of the torsion spring 38 increases, and the preload increases, which can reduce the gap. When the screen 4 is extended, the preload does negative work, which can also reduce the gap and effectively prevent the system from shaking. When the vehicle passes through a bumpy road, the torsion spring 4 can also reduce the system gap and fix the screen 4 in a rough position.
[0056] In summary, the screen rotation mechanism according to the present invention can rotate the handrail screen that cannot rotate along a fixed axis, or be applied to other related fields. A virtual axis is created through the arc track groove. The rotational motion of the motor is converted into the translational reciprocating motion of the screw and the rack through the input gear, the double gear and the transmission gear. The linear motion is converted into the circular motion of the screen around the virtual rotating axis through the output gear, so that there is no physical axis but the fixed axis rotation function can be realized. Moreover, the screen rotation mechanism according to the present invention has a high platform advantage, can realize the function of free adjustment of electric drive and manual drive, can hover at any position and switch the adjustment mode, and has a high promotion value.
[0057] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The above embodiment of the present invention can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the description of the present invention fall within the scope of protection of the claims of the present invention. The contents not described in detail in the present invention are all conventional technical contents.
Claims
1. A screen rotation mechanism, characterized in that: The screen rotation mechanism includes a base, a transmission mechanism and a screen, wherein the base has an arc track groove, the center of the arc track groove defines a virtual rotation axis, the transmission mechanism includes a bracket, the bracket is connected to the arc track groove through a rotating component, and the screen is fixedly mounted on the bracket to rotate around the rotation axis.
2. The screen rotation mechanism according to claim 1, characterized in that: The bracket has legs, and mounting holes are formed at the ends of the legs. The rotating assembly passing through the mounting holes is accommodated in the circular arc track groove and rolls, so that the bracket and the screen connected thereto rotate along the path defined by the circular arc track groove.
3. The screen rotation mechanism according to claim 2, characterized in that: Two mounting holes spaced apart from each other are formed at the ends of the legs.
4. The screen rotation mechanism according to claim 3, characterized in that: The bracket has two opposite legs, and the bracket rotates on the base through four rotating components.
5. The screen rotation mechanism according to claim 1, characterized in that: The transmission mechanism also includes an output gear fixedly mounted on the bracket, and the rotation center of the output gear is the rotary axis.
6. The screen rotation mechanism according to claim 5, characterized in that: The transmission mechanism also includes an input gear, a double gear, a screw assembly and a rack, wherein the screw assembly includes a screw and a transmission gear fixed to the screw and rotating coaxially with the screw, the double gear is meshed with the input gear and the transmission gear at the same time, and the rack connects the screw and the output gear.
7. The screen rotation mechanism according to claim 6, characterized in that: The rotational motion of the motor is converted into the translational reciprocating motion of the lead screw and the rack through the input gear, the duplex gear and the transmission gear, and the linear motion is converted into the circular motion of the screen around the virtual rotation axis through the output gear.
8. The screen rotation mechanism according to claim 6, characterized in that: The rack includes an internal thread arranged inside and a tooth plate arranged on the outer surface, the internal thread is meshed with the thread of the lead screw, and the tooth plate is meshed with the output gear.
9. The screen rotation mechanism according to claim 6, characterized in that: The duplex gear includes a large tooth meshing with the input gear and a small tooth meshing with the transmission gear; the diameter of the input gear is smaller than the diameter of the large tooth; and / or the diameter of the small tooth is smaller than the diameter of the transmission gear.
10. The screen rotation mechanism according to claim 6, characterized in that: The screen rotating mechanism also includes a gear box, which is fixedly mounted on the base and connected to the transmission mechanism to drive the transmission mechanism.