A vehicle-mounted display flipping drive device

Abstract

The present invention relates to a flip driving device for an in-vehicle display, which comprises a gearbox and an output shaft arranged on the gearbox. An output shaft driving mechanism driven by a first motor and an output shaft clamping mechanism driven by a second motor are arranged in the gearbox. The output shaft driving mechanism comprises a first worm arranged on the output shaft of the first motor, a first gear meshing with the first worm, an anti-lock gear, and a second gear arranged on the output shaft and meshing with the anti-lock gear. A first intermediate transmission gear is arranged between the first gear and the anti-lock gear. The advantages of the present invention are as follows: it can avoid gear damage; it can eliminate the jitter caused by gear clearance during vehicle driving of the display, avoid damage to the first motor when the display is manually flipped, and can slip under a certain torque when hitting the display to ensure personal safety.

Description

Technical Field

[0001] The present invention relates to the field of in-vehicle displays, and particularly to an in-vehicle display flipping drive device. Background Art

[0002] An in-vehicle display is a display device installed inside a vehicle, and is usually installed on the top inside the vehicle. The in-vehicle display includes a base, a display screen, and a flipping drive device. There are two flipping drive devices in total, which are fixed on the base and are respectively located on both sides of the display screen. The two flipping drive devices are respectively connected to the display screen, and the flipping of the display screen is driven by the flipping drive device to realize the opening and closing of the display screen.

[0003] In actual use, under the dual influence of the vibration generated during vehicle driving and the self-weight of the display, the display generates a large torque on the output shaft. This torque acts on each gear of the flipping drive device through the output shaft. Over time, it is easy to cause gear damage and affect the opening and closing function of the in-vehicle display. In addition, during the opening process of the in-vehicle display, as the opening angle gradually increases, the included angle between itself and gravity gradually decreases, making the flipping speed of the in-vehicle display tend to increase, which will increase the pressure on the flipping drive device and affect the stability of the in-vehicle display when it is opened. Summary of the Invention

[0004] The present invention mainly solves the above problems, and provides an in-vehicle display flipping drive device which is provided with a mechanism capable of locking the output shaft, preventing the torque generated by the display on the output shaft from being transmitted to the output shaft drive mechanism, and capable of generating a certain damping on the output shaft during the opening process of the in-vehicle display, reducing the pressure on the output shaft drive mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problems is an in-vehicle display flipping drive device, which includes a gearbox and an output shaft arranged on the gearbox. An output shaft drive mechanism driven by a first motor and an output shaft clamping mechanism driven by a second motor are arranged in the gearbox. The output shaft drive mechanism includes a first worm arranged on the output shaft of the first motor, a first gear meshing with the first worm, an anti-lock gear, and a second gear arranged on the output shaft and meshing with the anti-lock gear. A first intermediate transmission gear is arranged between the first gear and the anti-lock gear.

[0006] The output shaft clamping mechanism locks the output shaft, preventing the torque generated by the in-vehicle display on the output shaft from being transmitted to the output shaft drive mechanism, and avoiding damage to the first motor and the gears in the output shaft drive mechanism; the output shaft clamping mechanism can provide a locking force positively correlated with the opening angle of the in-vehicle display when the output shaft drive mechanism drives the in-vehicle display to open to offset the influence of gravity on the opening speed of the in-vehicle display, ensuring the stable opening of the in-vehicle display and reducing the pressure on the output shaft drive mechanism.

[0007] As a preferred embodiment of the above scheme, the output shaft clamping mechanism includes a second worm gear arranged on the output shaft of the second motor, a third gear meshing with the second worm gear, a clamping hoop, a locking gear for controlling the closing of the clamping hoop, and a locking wheel arranged on the output shaft, the clamping hoop is arranged on both sides of the locking wheel, and a second intermediate transmission gear is arranged between the third gear and the locking gear.

[0008] As a preferred scheme of the above scheme, the clamp includes two arc-shaped locking plates and two transmission arms, the first end of the arc-shaped locking plate is rotatably set on the gear box, the second end of the arc-shaped locking plate is rotatably connected to the first end of the transmission arm, the middle part of the transmission arm is rotatably connected to the gear box, and a protrusion is provided on the locking gear, and the protrusion is located between the second ends of the two transmission arms. When the locking gear rotates, the protrusion makes the second ends of the two transmission arms move away from each other so that the arc-shaped locking plate locks the locking wheel.

[0009] As a preferred embodiment of the above scheme, the anti-locking gear includes a first sub-gear, a second sub-gear, a screw and a nut, and the screw includes a baffle, a first sub-gear sleeve portion, a second sub-gear sleeve portion and a threaded portion from top to bottom. The first sub-gear is rotatably arranged on the first sub-gear sleeve portion, and the second sub-gear is sleeved on the second sub-gear sleeve portion. The second sub-gear and the second sub-gear sleeve portion are relatively stationary. A damping gasket is provided between the first sub-gear, the second sub-gear and the baffle, and the nut is screwed on the bolt portion to make the second sub-gear, the first sub-gear and the baffle abut against each other. When the output shaft driving mechanism controls the flipping of the vehicle-mounted display, under the action of friction, the first sub-gear drives the screw to rotate, and the screw drives the second sub-gear to rotate, thereby realizing the opening and closing of the vehicle-mounted display screen; when the vehicle-mounted display is manually opened or closed, the first motor is self-locking and cannot rotate, resulting in the first sub-gear also being unable to rotate. At this time, the force applied to the vehicle-mounted display by the hand is transmitted to the second sub-gear through the output shaft. Since the second sub-gear and the screw are relatively stationary, the first sub-gear is rotationally connected to the screw, so that the second sub-gear can drive the screw to rotate while the first sub-gear remains stationary, thereby avoiding damage to the second motor.

[0010] As a preferred solution of the above solution, the first gasket is embedded in the upper and lower end surfaces of the first sub-gear, and the first gasket and the first sub-gear remain relatively stationary.

[0011] As a preferred solution of the above solution, a second gasket is embedded in the end surface of the second sub-gear facing the first sub-gear, and the second gasket and the screw remain relatively stationary.

[0012] As a preferred solution of the above solution, bearings are provided at both upper and lower ends of the screw rod, and the anti-locking gear is rotatably arranged in the gear box through the bearings.

[0013] As a preferred embodiment of the above solution, the gearbox includes a bearing part, a first housing and a second housing. The first housing and the second housing are respectively arranged on both sides of the bearing part. The first housing and the bearing part form a first cavity for installing the output shaft driving mechanism, and the second housing and the bearing part form a second cavity for installing the output shaft clamping mechanism.

[0014] As a preferred embodiment of the above solution, a first PCB board for detecting the rotation angle of the output shaft is provided at the position corresponding to the output shaft on the first housing.

[0015] As a preferred embodiment of the above solution, a window is opened on the second housing corresponding to the locking gear, and a second PCB board for detecting the rotation angle of the locking gear is provided in the window.

[0016] The advantages of the present invention are as follows: An output shaft clamping mechanism is provided, which can prevent the torque generated by the in-vehicle display on the output shaft from being transmitted to the output shaft driving mechanism and can eliminate the jitter caused by the gear clearance of the display during vehicle driving, avoiding damage to the gears in the first motor and the output shaft driving mechanism; The output shaft clamping mechanism can also provide a locking force positively correlated with the opening angle of the in-vehicle display when the output shaft driving mechanism drives the in-vehicle display to open, so as to offset the influence of gravity on the opening speed of the in-vehicle display, ensure the stable opening of the in-vehicle display and reduce the pressure on the output shaft driving mechanism; The anti-lock gear is used for power transmission between the first motor and the output shaft, avoiding damage to the first motor when the in-vehicle display is manually flipped, and can slip under a certain torque when encountering the display, ensuring the safety of people. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the in-vehicle display flipping driving device in the embodiment.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the output shaft driving mechanism in the embodiment.

[0019] Figure 3 It is an exploded view of the anti-lock gear in the embodiment.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the screw rod in the embodiment.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the output shaft clamping mechanism in the embodiment.

[0022] Figure 6 It is a top view structural schematic diagram of the output shaft clamping mechanism in the embodiment.

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the locking gear in the embodiment.

[0024] 1 - Bearing part 2 - First housing 3 - Second housing 4 - Output shaft 5 - First PCB board 6 - Second PCB board 7 - First motor 8 - Second motor 9 - First worm 10 - First gear 11 - First intermediate transmission gear 12 - Anti - locking gear 13 - Second gear 14 - Second worm 15 - Third gear 16 - Second intermediate transmission gear 17 - Locking gear 18 - Hoop 19 - Locking wheel 121 - Screw 122 - First sub - gear 123 - Second sub - gear 124 - Nut 125 - First gasket 126 - Second gasket 127 - Tile gasket 128 - Bearing 1211 - Baffle 1212 - First sub - gear socket part 1213 - Second sub - gear socket part 1214 - Thread part 171 - Gear part 172 - Protrusion 173 - Limiting part 181 - Arc - shaped locking plate 182 - Transmission arm. Detailed implementation mode

[0025] The technical solution of the present invention will be further described below through embodiments in conjunction with the drawings.

[0026] Embodiment:

[0027] In this embodiment, a vehicle - mounted display flipping drive device, as Figure 1 shown, includes a gearbox and an output shaft 4 provided on the gearbox. The gearbox includes a bearing part 1, a first housing 2 and a second housing 3. The first housing 2 and the second housing 3 are respectively arranged on both sides of the bearing part 1. The first housing 3 and the bearing part 1 form a first cavity for installing an output shaft driving mechanism, and the second housing 3 and the bearing part 1 form a second cavity for installing an output shaft clamping mechanism. Among them, the output shaft driving mechanism is driven by the first motor 7 and the output shaft clamping mechanism is driven by the second motor 8.

[0028] As Figure 2 shown, the output shaft driving mechanism includes a first worm 9 provided on the output shaft of the first motor 7, a first gear 10 meshed with the first worm, an anti - locking gear 12, and a second gear 13 provided on the output shaft and meshed with the anti - locking gear. A first intermediate transmission gear 11 is arranged between the first gear and the anti - locking gear. As Figure 3 and Figure 4As shown, the anti-lock gear 12 includes a first sub-gear 122, a second sub-gear 123, a screw 121 and a nut 124. The screw 121 includes a baffle 1211, a first sub-gear sleeve portion 1212, a second sub-gear sleeve portion 1213 and a threaded portion 1214 from top to bottom. The central through hole of the first sub-gear 122 and the cross-section of the first sub-gear sleeve portion 1212 are both circular so that the first sub-gear 122 can be rotatably arranged on the first sub-gear sleeve portion 1212. The central through hole and the second sub-gear 123 are The cross-section of the second sub-gear sleeve part 1213 is square so that after the second sub-gear 123 is sleeved on the second sub-gear sleeve part 1213, the second sub-gear and the second sub-gear sleeve part are relatively stationary. A damping mechanism is provided between the first gear 122, the second gear 123 and the baffle 121. The damping mechanism includes two first gaskets 125. The first gasket 125 is embedded in the first grooves on the upper and lower end surfaces of the first sub-gear 122. The first groove and the first gasket are both oval-shaped so that the first gasket and the first sub-gear remain relatively stationary. The second sub-gear 123 is provided with a second groove facing the end surface of the first sub-gear 122, and a second gasket 126 is provided in the second groove. The nut 124 is screwed on the bolt part 1214 so that the second sub-gear 125, the first gear 122 and the baffle 1211 are abutted against each other. A plurality of shims 7 are provided between the second gear 3 and the nut 4. The first sub-gear 122 is meshed with the first intermediate transmission gear 11, and the second sub-gear 123 is meshed with the second gear 13. When the vehicle display flipping driving mechanism drives the vehicle display to flip, the first motor 7 drives the first gear 10 to rotate, the first gear 10 drives the first intermediate transmission gear 11, and the first intermediate transmission gear 11 drives the first sub-gear 122 to rotate. Due to the existence of the damping mechanism, the first sub-gear 122 can drive the screw 121 and the second sub-gear 123 to rotate when rotating, and then drive the vehicle display output shaft to rotate, so that the vehicle display is opened. When the vehicle display is manually opened or closed, the first motor 7 cannot rotate due to self-locking, resulting in the first sub-gear also cannot rotate. At this time, the force of the hand on the vehicle display is transmitted to the second sub-gear through the output shaft. When this force is greater than the damping provided by the damping mechanism, under the action of the second sub-gear, the screw can rotate with the second sub-gear, and the first sub-gear remains stationary, avoiding excessive torque from being transmitted to the first intermediate gear, the first gear and the first motor, causing damage to the first intermediate transmission gear, the first gear and the first motor.

[0029] In this embodiment, in order to facilitate the rotation of the screw, a bearing 8 is provided at each of the upper and lower ends of the screw, and the screw is arranged between the bearing portion 1 and the first housing 2 through the bearing 8. At the same time, a first PCB board 5 for detecting the rotation angle of the output shaft is provided at the first housing 2 corresponding to the output shaft 4.

[0030] like Figure 5As shown in the figure, the output shaft clamping mechanism includes a second worm 14 provided on the output shaft of the second motor 8, a third gear 15 meshing with the second worm 14, a hoop 18, a locking gear 17 for controlling the closing of the hoop, and a locking wheel 19 provided on the output shaft. The hoop 18 is arranged on both sides of the locking wheel 19, and a second intermediate transmission gear 16 is arranged between the third gear 15 and the locking gear 17.

[0031] As Figure 6 shown in the figure, the hoop includes two arc-shaped locking plates 181 and two transmission arms 182. The arc-shaped locking plates 181 are located above and below the locking wheel 19. The first end of the arc-shaped locking plate is rotatably arranged on the bearing part and is located on the left side of the locking wheel 19. The second end of the arc-shaped locking plate 181 is located on the right side of the locking wheel 19 and is rotatably connected to the first end of the transmission arm 182. The middle of the transmission arm is rotatably connected to the bearing part, and the locking gear 17 is arranged at the second end of the transmission arm. As Figure 7 shown in the figure, the locking gear includes an engaging part 171, an oval-shaped convex block 172, and an arc-shaped limiting part 173. The convex block 172 is arranged on the lower end surface of the engaging part, and the limiting part 173 is arranged on the upper end surface of the engaging part. The convex block 172 is located between the second ends of the two transmission arms, and the engaging part meshes with the second intermediate transmission gear. At the same time, on the second housing, a window is provided corresponding to the limiting part 173 on the gearbox. A second PCB board 6 for detecting the rotation angle of the locking gear is arranged in the window, and a limiting groove for preventing the locking gear from rotating excessively is arranged on the window wall corresponding to the movement track of the limiting part.

[0032] When the second motor 7 locks the output shaft, the second motor 7 drives the second worm 9 to rotate. The second worm 9 drives the third gear 10 to rotate. The rotation of the third gear 10 is transmitted to the locking gear 12 through the second intermediate transmission gear 11, so that the convex block of the locking gear 12 rotates to make the length direction of the convex block tend to be perpendicular to the two transmission arms. During this process, the distance between the second ends of the two transmission arms gradually increases under the action of the convex block, while the first ends of the two transmission arms approach each other, so that the second ends of the two arc-shaped locking plates also approach each other, making the two arc-shaped locking plates clamp the locking wheel, and then locking the output shaft.

[0033] In this embodiment, the output shaft driving mechanism and the output shaft clamping mechanism in the in-vehicle display flipping driving device can be used in combination in addition to driving and locking the output shaft separately. During the opening process of the in-vehicle display, as the opening angle gradually increases, the angle between itself and gravity gradually decreases, making the flipping speed of the in-vehicle display tend to increase, which will increase the pressure of the flipping driving device and affect the stability of the in-vehicle display when it is opened. At this time, the output shaft clamping mechanism can provide a locking force positively correlated with the opening angle of the in-vehicle display to offset the influence of gravity on the opening speed of the in-vehicle display, ensure the stable opening of the in-vehicle display, and reduce the pressure on the output shaft driving mechanism.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vehicle-mounted display flipping drive device, characterized in that: It includes a gearbox and an output shaft arranged on the gearbox. In the gearbox, there is an output shaft driving mechanism driven by a first motor and an output shaft clamping mechanism driven by a second motor. The output shaft driving mechanism includes a first worm arranged on the output shaft of the first motor, a first gear meshing with the first worm, an anti-lock gear, and a second gear arranged on the output shaft and meshing with the anti-lock gear. A first intermediate transmission gear is arranged between the first gear and the anti-lock gear; the output shaft clamping mechanism includes a second worm arranged on the output shaft of the second motor, a third gear meshing with the second worm, a hoop, a locking gear for controlling the closing of the hoop, and a locking wheel arranged on the output shaft. The hoop is arranged on both sides of the locking wheel. A second intermediate transmission gear is arranged between the third gear and the locking gear; the hoop includes two arc-shaped locking plates and two transmission arms. The first end of the arc-shaped locking plate is rotatably arranged on the gearbox, the second end of the arc-shaped locking plate is rotatably connected to the first end of the transmission arm, the middle of the transmission arm is rotatably connected to the gearbox, and a convex block is arranged on the locking gear and is located between the second ends of the two transmission arms. When the locking gear rotates, the convex block makes the second ends of the two transmission arms move away from each other, so that the arc-shaped locking plate locks the locking wheel; the anti-lock gear includes a first sub-gear, a second sub-gear, a screw rod, and a nut. The screw rod sequentially includes a baffle, a first sub-gear sleeving part, a second sub-gear sleeving part, and a threaded part from top to bottom. The first sub-gear is rotatably arranged on the first sub-gear sleeving part, the second sub-gear is sleeved on the second sub-gear sleeving part, the second sub-gear is relatively stationary with the second sub-gear sleeving part, a first gasket is arranged between the first sub-gear and the second sub-gear and the baffle, and the nut is screwed on the bolt part to make the second sub-gear, the first sub-gear, and the baffle abut against each other.

2. The in-vehicle display flipping drive device according to claim 1, characterized in that: The first gasket is embedded in the upper and lower end faces of the first sub-gear, and the first gasket remains relatively stationary with the first sub-gear.

3. The in-vehicle display flipping drive device according to claim 1, characterized in that: A second gasket is embedded in the end face of the second sub-gear facing the first sub-gear, and the second gasket remains relatively stationary with the screw rod.

4. A vehicle-mounted display flipping drive device according to claim 1, characterized in that: Bearings are arranged at both the upper and lower ends of the screw rod, and the anti-lock gear is rotatably arranged in the gearbox through the bearings.

5. A vehicle-mounted display flipping drive device according to claim 1, characterized in that: The gearbox includes a bearing part, a first housing, and a second housing. The first housing and the second housing are respectively arranged on both sides of the bearing part. The first housing and the bearing part form a first cavity for installing the output shaft driving mechanism, and the second housing and the bearing part form a second cavity for installing the output shaft clamping mechanism.

6. The in-vehicle display flipping drive device according to claim 5, characterized in that: A first PCB board for detecting the rotation angle of the output shaft is arranged on the first housing corresponding to the output shaft.

7. The in-vehicle display flipping drive device according to claim 5, characterized in that: A window is opened on the second housing corresponding to the locking gear, and a second PCB board for detecting the rotation angle of the locking gear is arranged in the window.

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