Self-locking turnover device for automobile display screen

Abstract

The utility model discloses an automobile display screen self-locking turnover device which comprises a motor body, a reduction gear box and a self-locking mechanism, the reduction gear box comprises a sun gear, an inner gear ring, planet carrier assemblies, an upper end cover assembly and a lower end cover, and the planet carrier assemblies are connected in series and installed in the inner gear ring to achieve multi-stage large-transmission-ratio speed reduction. The self-locking mechanism comprises an output disc, a brake ring, a roller, a brake disc and an output shaft, disc protrusions are arranged on the outer side face of the output disc, disc protrusion grooves and roller grooves which are used for being matched with the disc protrusions and the roller are formed in the brake disc, the output disc and the brake disc are concentrically installed, the disc protrusions of the output disc are correspondingly clamped into the disc protrusion grooves of the brake disc, and the roller protrusions of the output disc are clamped into the roller grooves of the brake disc. The pin rollers are arranged in the pin roller grooves and located on the two sides of the disc protrusions, brake rings are installed on the peripheries of the brake disc and the output disc, and brake teeth are evenly distributed on the outer sides of the brake rings and used for being clamped into the tooth grooves of the inner gear ring. The device is compact in structure, high in efficiency, low in cost and capable of achieving speed reduction and providing larger self-locking force.

Description

Technical Field

[0001] The utility model relates to a self-locking flipping device for a car display screen, belonging to the field of motor drive applications. Background Art

[0002] The car display screen flipping uses a motor as a power source, and increases the torque through a reduction device to drive the car display screen to flip to a suitable position, thereby achieving a comfortable experience for the user.

[0003] At present, in the automotive field, especially in the field of automobile display screen flipping, a commonly used device is to use a motor as a power source and drive the automobile display screen through a gear reduction device to reduce speed and increase torque to achieve the appropriate position of the display screen. In practical applications, it is necessary to reduce speed for the automobile display screen flipping device and require the device to be self-locking. The commonly used method at present is to use a motor as a power source, press a worm on the motor output shaft, and realize the deceleration and torque increase of the device through the worm and worm gear transmission, and realize the self-locking effect of the device. Although this method can achieve deceleration and self-locking of the device through the worm and worm gear, the self-locking force of the device is not large, especially when it involves a small-volume reduction device, the self-locking effect achieved by the worm and worm gear is less obvious, and the efficiency is very low. Therefore, how to design a self-locking flipping device for automobile display screens with a compact structure, small footprint and high efficiency is a technical problem that needs to be solved at present. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems and shortcomings of the above-mentioned prior art and to provide a self-locking flipping device for a car display screen, which directly connects and fixes the motor and the reduction device. The whole device has a compact and small structure, occupies a small space, has high efficiency and low cost, and the device can achieve deceleration and provide greater self-locking force.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a self-locking flip device for a car display screen, comprising a motor body, a reduction gearbox and a self-locking mechanism, the reduction gearbox comprising a sun gear, an inner gear ring, a planetary carrier assembly, an upper end cover assembly and a lower end cover assembly, the planetary carrier assembly is provided with at least two groups, and is mutually installed in series in the inner gear ring to realize multi-stage large transmission ratio deceleration, the self-locking mechanism comprises an output disc, a brake ring, a roller, a brake disc and an output shaft, the output disc is driven to rotate by the planetary carrier assembly, a disc protrusion is provided on the outer side surface of the output disc, the brake disc is provided with a disc protrusion groove and a roller groove for matching with the disc protrusion and the roller, the output disc is installed concentrically with the brake disc, the disc protrusion of the output disc is correspondingly inserted into the disc protrusion groove of the brake disc, the roller is arranged in the roller groove and is located on both sides of the disc protrusion, the outer periphery of the brake disc and the output disc is provided with a brake ring, the outer side of the brake ring is evenly provided with brake teeth, and the brake teeth are used to be inserted into the tooth groove of the inner gear ring.

[0006] Furthermore, the planetary carrier assembly consists of a planetary shaft, a planetary carrier and a planetary wheel. The planetary shaft is interference riveted into a corresponding hole of the planetary carrier, and the planetary wheel is installed on the corresponding planetary shaft through its own center hole and can rotate freely around the planetary shaft.

[0007] Furthermore, the lower end cover assembly includes a lower end cover, which is installed on the boss of the motor through its own center hole and is locked to the motor body with screws; a circular boss is provided on the outer end surface of the lower end cover, and the circular boss is assembled with the assembly hole gap corresponding to the lower end of the gear ring and fixed by screws.

[0008] Furthermore, the upper end cover assembly includes two upper and lower bearings and an upper end cover, and the two outer rings of the bearings are respectively interference pressed into the upper and lower holes of the upper end cover; a circular boss is provided on the inner end surface of the upper end cover, and the circular boss is assembled with the gap between the assembly holes corresponding to the upper end of the gear ring and fixed by screws.

[0009] Furthermore, the output disc is connected to the last-stage planet carrier assembly via a planet shaft.

[0010] Furthermore, the output shaft is riveted into the center hole of the brake disc by interference riveting, and the output shaft passes through the bearing hole of the upper end cover assembly of the reduction gear box.

[0011] Furthermore, three disc protrusions are provided, and six rollers are provided. The three disc protrusions are evenly distributed, and a roller is provided on both sides of each disc protrusion.

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

[0013] (1) The deceleration efficiency of this device through the planetary gearbox is much higher than the deceleration efficiency of the worm gear on the market that achieves the same transmission ratio.

[0014] (2) The device uses a unique self-locking mechanism to achieve greater self-locking force than conventional worm gears on the market, thereby improving the safety and stability of the product.

[0015] (3) When the device applies a certain torque to the output shaft from the outside, the self-locking mechanism in the device ensures that the teeth in the gearbox will not be damaged due to overload, greatly improving the reliability and safety of the product.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the appearance diagram of the assembled product of the utility model.

[0018] Figure 2 It is an exploded view of the product of the utility model.

[0019] Figure 3 It is a partial cross-sectional view of the utility model.

[0020] Figure 4 It is a structural diagram of a planet carrier assembly of the utility model.

[0021] Figure 5 It is a structural diagram of the lower end cover of the utility model.

[0022] Figure 6 It is a structural diagram of the upper end cover assembly of the utility model.

[0023] Figure 7 It is a structural diagram of the inner gear ring of the utility model.

[0024] Figure 8 and Fig. 9 It is a structural diagram of the self-locking mechanism of the utility model.

[0025] Fig.10 It is a cross-sectional view of the self-locking mechanism of the utility model.

[0026] Markings in the figure are: 1-motor body, 2-motor boss, 3-motor output shaft, 4-sun gear, 5-lower end cover, 6-screws, 7-planetary gear, 8-planetary shaft, 9-planet carrier, 10-inner gear ring, 11-output disc, 12-roller, 13-brake ring, 14-brake disc, 15-output shaft, 16-bearing, 17-upper end cover, 18-circular boss, 19-gear ring upper end hole, 20-gear ring lower end hole, 21-output disc hole, 22-disc protrusion, 23-brake tooth, 24-brake disc center hole, 25-roller groove, 26-disc protrusion groove. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 10 Shown: A self-locking flip device for a car display screen, which is mainly composed of a motor body, a reduction gear box and a self-locking mechanism. Among them:

[0029] The reduction gearbox is mainly composed of a sun gear 4, an inner gear ring 10, a planetary gear 7, a planetary shaft 8, a planetary carrier assembly, an upper end cover assembly, and a lower end cover assembly. The interconnection method is as follows: the planetary shaft 8 is interference riveted into the corresponding hole of the planetary carrier, the planetary wheel 7 is installed on the corresponding planetary shaft 8 through its own center hole and can rotate freely around the planetary shaft 8, the planetary carrier assembly is composed of the planetary shaft 8, the planetary carrier 9, and the planetary wheel 7, and multiple planetary carrier assemblies are installed in series in the inner gear ring 9 to achieve multi-stage large transmission ratio reduction. The output shaft 3 of the motor is rigidly riveted with the center hole of the sun gear 4 itself; the lower end cover 5 is installed on the corresponding boss of the motor through its own center hole, and the lower end cover is locked on the motor body 1 with screws; the lower end cover 5 is assembled through the gap between its own circular boss 18 and the assembly hole corresponding to the lower end of the gear ring and is locked and fixed by screws. The upper end cover assembly is mainly composed of a bearing 16 and an upper end cover 17, and the outer ring of the bearing 16 is respectively interference pressed into the upper and lower holes of the upper end cover 17.

[0030] The self-locking mechanism mainly consists of an output disc 11, a brake ring 13, a roller 12, an output shaft 15, and a brake disc 14. The interconnection mode is as follows: the planetary shaft in the last stage planetary carrier assembly is riveted to the corresponding output disc hole 21 by interference riveting, a disc protrusion 22 is provided on the outer side of the output disc 11, a disc protrusion groove 26 and a roller groove 25 for matching with the disc protrusion 22 and the roller 12 are provided on the brake disc 14, the output disc 11 is installed concentrically with the brake disc 14, the disc protrusion 22 of the output disc 11 is correspondingly inserted into the disc protrusion groove 26 of the brake disc 14, the roller 12 is arranged in the roller groove 25 and is located on both sides of the disc protrusion 22, and the output shaft 15 is riveted to the central hole of the corresponding brake disc 14 by interference riveting; at the same time, a brake ring 13 is installed on the periphery of the brake disc 14 and the output disc 11, and the brake ring 13 not only limits the radial movement of the output disc 11 and the brake disc 14, but also limits the radial movement of the roller 12. The outer side of the brake ring 13 is provided with evenly distributed brake teeth 23 which can be inserted into the tooth grooves of the inner gear ring to limit the rotation of the brake ring.

[0031] In this embodiment, the self-locking mechanism is installed in the inner gear ring 10 of the reduction gear box, wherein the brake teeth 23 evenly distributed on the outside of the brake ring 13 are inserted into the tooth grooves of the inner gear ring to limit the rotation of the brake ring, and the output shaft 15 on the self-locking mechanism passes through the bearing hole of the upper end cover assembly of the reduction gear box; a multi-stage planetary carrier assembly is connected in series inside the inner gear ring to realize multi-stage reduction of the gear box.

[0032] The working principle of this device: the output shaft 3 of the motor is rigidly riveted with the sun gear 4 as a power source. When the motor rotates forward and reverse, it will drive the sun gear 4 on the motor. At this time, the inner gear ring 10 is fixed, and the planetary gear 7 will revolve around the planetary carrier 9 while rotating. The inner gear ring 10 is connected in series with multiple-stage planetary carrier components to achieve large transmission deceleration output. The brake teeth 23 evenly distributed on the outside of the brake ring 13 are inserted into the tooth grooves of the inner gear ring 10 and fixed. When the last level of power is transmitted to the output disk 11, the disc protrusion 22 on the output disk 11 will push the roller 12 to rotate around the center of the gear ring and then promote the rotation of the brake disk 14, and the output shaft 15 is rigidly riveted to the center hole of the brake disk 14 through interference fit. At this time, the output shaft 15 is output as a power medium. The output shaft 15 is fixedly connected to the car display screen, thereby realizing the flipping of the display screen.

[0033] When the car display screen is flipped to the appropriate position through the motor power and the self-locking flipping device, the motor power is cut off. At this time, if the display screen flips under the action of external force, the power will be transmitted to the output shaft 15 through the display screen, and the output shaft 15 will transmit the power to the brake disc 14. At this time, the groove on the brake disc 14 will push the roller 12. Due to the groove feature on the brake disc 14, the roller 12 will be squeezed to move radially outward, and the outer side will prevent the roller 12 from moving outward due to the presence of the inner ring of the brake ring, thereby achieving complete self-locking of the device.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the utility model in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the utility model.

[0035] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A self-locking flipping device for a car display screen, comprising a motor body and a reduction gear box, characterized in that: The gearbox further comprises a self-locking mechanism, wherein the reduction gearbox comprises a sun gear, an inner gear ring, a planetary carrier assembly, an upper end cover assembly and a lower end cover assembly, wherein at least two planetary carrier assemblies are arranged and are mutually installed in series in the inner gear ring to realize multi-stage large transmission ratio reduction, wherein the self-locking mechanism comprises an output disc, a brake ring, a roller, a brake disc and an output shaft, wherein the output disc is driven to rotate by the planetary carrier assembly, a disc protrusion is arranged on the outer surface of the output disc, a disc protrusion groove and a roller groove for cooperating with the disc protrusion and the roller are arranged on the brake disc, the output disc is installed concentrically with the brake disc, the disc protrusion of the output disc is correspondingly inserted into the disc protrusion groove of the brake disc, the roller is arranged in the roller groove and is located on both sides of the disc protrusion, the periphery of the brake disc and the output disc is provided with a brake ring, the outer side of the brake ring is evenly provided with brake teeth, and the brake teeth are used to be inserted into the tooth groove of the inner gear ring.

2. A self-locking flipping device for a car display screen according to claim 1, characterized in that: The planetary carrier assembly consists of a planetary shaft, a planetary carrier and a planetary wheel. The planetary shaft is interference riveted into a corresponding hole of the planetary carrier, and the planetary wheel is installed on the corresponding planetary shaft through its own center hole and can rotate freely around the planetary shaft.

3. The self-locking flipping device for a car display screen according to claim 1, characterized in that: The lower end cover assembly includes a lower end cover, which is installed on the boss of the motor through its own center hole and is locked on the motor body with screws; a circular boss is provided on the outer end surface of the lower end cover, and the circular boss is assembled with the assembly hole gap corresponding to the lower end of the gear ring and fixed by screws.

4. The self-locking flipping device for a car display screen according to claim 1, characterized in that: The upper end cover assembly includes two upper and lower bearings and an upper end cover, and the two outer rings of the bearings are respectively pressed into the upper and lower holes of the upper end cover by interference fit; a circular boss is provided on the inner end surface of the upper end cover, and the circular boss is assembled with the gap between the assembly holes corresponding to the upper end of the gear ring and fixed by screws.

5. The self-locking flipping device for a car display screen according to claim 1, characterized in that: The output disc is connected to the last-stage planet carrier assembly through a planet shaft.

6. The self-locking flipping device for a car display screen according to claim 1, characterized in that: The output shaft is riveted into the center hole of the brake disc by interference riveting, and the output shaft passes through the bearing hole of the upper end cover assembly of the reduction gear box.

7. The self-locking flipping device for a car display screen according to claim 1, characterized in that: The disc protrusions are arranged with three and the rollers are arranged with six. The three disc protrusions are evenly distributed, and a roller is arranged on both sides of each disc protrusion.

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