Gear box, vehicle-mounted ceiling screen and rotation limiting method of vehicle-mounted ceiling screen
By introducing sliding installation of limiting parts and limiting slots into the gear box of the vehicle ceiling screen, combined with the dual control of the current sensor and contact switch, the problem of high limiting costs is solved, low-cost and high-precision limiting effects are achieved, and the stability and safety of the equipment are improved.
Patent Information
- Application Number
- CN202510635937.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-07-25
AI Technical Summary
The gearbox limit structure of the existing vehicle-mounted ceiling screen consumes a lot of machining, resulting in increased manufacturing and production costs, insufficient strength and poor durability.
A gearbox structure is designed, including a limiting part and a limiting slot, and mechanical limiting is achieved through the sliding installation of the limiting block and the limiting slot. Combined with the transmission structure and detection parts, the limit is accurately controlled by current sensors and contact switches, and the alarm is set to remind and maintain in case of a fault.
It reduces limit costs, improves the service life and limit accuracy of limit parts, ensures stable screen rotation, improves the safety and operation convenience of the equipment, and extends the service life of the equipment.
Smart Images
Figure CN120368025A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of transmission technology, and particularly relates to a gearbox, an in-vehicle ceiling screen, and a method for limiting the rotation of the in-vehicle ceiling screen. Background Art
[0002] To prevent the in-vehicle ceiling screen from being overly flipped to damage the structural components, a mechanical limiting structure is required. The mechanical limiting structure can also be used for software debugging to find zero, prevent the control accuracy from decreasing during long-term operation, and perform zero calibration when shutting down abnormally.
[0003] Currently, the limiting structure of the gearbox of the in-vehicle ceiling screen consumes a large amount of machining design, resulting in an increase in manufacturing and production costs.
[0004] Therefore, how to reduce the cost of limiting the in-vehicle ceiling screen has become an urgent problem for those skilled in the art. Summary of the Invention
[0005] The main object of the present invention is to provide a gearbox, an in-vehicle ceiling screen, and a method for limiting the rotation of the in-vehicle ceiling screen, aiming to reduce the cost of limiting the in-vehicle ceiling screen.
[0006] To achieve the above object, the gearbox proposed by the present invention includes a box body, a limiting member, an input shaft, an output shaft, and a transmission structure; an inner cavity of the box body forms an installation side on a side wall in a first direction, and a first limiting portion is provided on the installation side; the limiting member is rotatably installed on the installation side around an axis extending in the first direction, and a second limiting portion corresponding to the first limiting block is provided at one end of the limiting member facing the installation side; the input shaft penetrates through the installation side and is offset from the limiting member in a second direction or a third direction, the output shaft penetrates through a side wall of the box body adjacent to or the same as the installation side to be connected to a driving device, and the output shaft is used to be connected to a driven device; the transmission structure is arranged in the inner cavity of the box body and is in transmission connection with the limiting member, the input shaft, and the output shaft; one of the first limiting portion and the second limiting portion is a limiting block, and the other is a limiting groove. The limiting groove is arc-shaped and has a first end wall and a second end wall arranged along the circumferential direction of the limiting member. The limiting block can be slidably installed in the limiting groove, and during the rotation of the limiting member, the limiting block can abut against the first end wall or the second end wall.
[0007] In one embodiment, the limiting member is provided as a limiting gear; the transmission structure includes a plurality of transmission gears, and the plurality of transmission gears are all rotatably mounted on the mounting side around an axis along a first direction. Two adjacent transmission gears are meshed with each other. One of the plurality of transmission gears is in transmission connection with the input shaft, and another one of the plurality of transmission gears is meshed with the limiting gear to drive the limiting gear to rotate; the limiting gear is coaxially arranged with the output shaft to drive the output shaft to rotate.
[0008] In one embodiment, buffer pads are attached to the first end wall and the second end wall of the limiting groove to buffer when the limiting block abuts against the first end wall and the second end wall.
[0009] The present invention further provides a vehicle-mounted ceiling screen, which includes a driving motor, a gearbox, a screen, a detecting member, and a control device; the driving motor is used for being installed in a vehicle; the gearbox includes a box body, a limiting member, an input shaft, and an output shaft; an inner cavity of the box body forms a mounting side on a side wall in a first direction, and a first limiting portion is arranged on the mounting side; the limiting member is rotatably mounted on the mounting side around an axis extending in the first direction, and a second limiting portion corresponding to the first limiting block is arranged at one end of the limiting member facing the mounting side; the input shaft penetrates through the mounting side and is offset from the limiting member in a second direction or a third direction, the output shaft penetrates through a side wall of the box body adjacent to or the same as the mounting side and is used for being connected to a driving device, and the output shaft is used for being connected to a driven device; a transmission structure is arranged in the inner cavity of the box body and is in transmission connection with the limiting member, the input shaft, and the output shaft; one of the first limiting portion and the second limiting portion is a limiting block, and the other is a limiting groove. The limiting groove is arc-shaped and has a first end wall and a second end wall arranged along the circumferential direction of the limiting member. The limiting block can be slidably mounted in the limiting groove, and during the rotation of the limiting member, the limiting block can abut against the first end wall or the second end wall; the screen is used for being installed in the vehicle and is connected to an end portion of the output shaft outside the box body. The screen has a storage position and an unfolding position during rotation. When the limiting block abuts against the first end wall, the screen rotates to the storage position, and when the limiting block abuts against the second end wall, the screen rotates to the unfolding position; the detecting member includes a current sensor, and the current sensor is electrically connected to the motor to detect the current of the motor; the control device is electrically connected to the driving motor and the current sensor.
[0010] In one embodiment, the limiting block has a first side end and a second side end which are oppositely arranged. The first side end can abut against the first end wall when the screen rotates to the storage position, and the second side end can abut against the first end wall when the screen rotates to the unfolded position. The detection member further includes a first contact switch and a second contact switch. The first contact switch is disposed on the first end wall or the first side end and is electrically connected to the control device. The second contact switch is disposed on the second end wall or the second side end and is electrically connected to the control device.
[0011] In one embodiment, the vehicle-mounted ceiling screen further includes an alarm, and the alarm is electrically connected to the control device.
[0012] In one embodiment, a worm and worm gear structure is provided between the limiting member and the input shaft. The worm of the worm and worm gear structure is coaxially connected to the limiting member, and the worm gear of the worm and worm gear structure is drivingly connected to the input shaft.
[0013] The present invention also provides a method for limiting the rotation of a vehicle-mounted ceiling screen. Based on the vehicle-mounted ceiling screen as described above, the method for limiting the rotation of the vehicle-mounted ceiling screen includes: obtaining real-time current information of the driving motor, where the real-time current information includes the current intensity measured by the current sensor within a rated time; if the real-time current information meets the current preset condition, controlling the driving motor to stop, and at this time the screen reaches the unfolded position or the storage position; where the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold.
[0014] The present invention also provides another method for limiting the rotation of a vehicle-mounted ceiling screen. Based on the vehicle-mounted ceiling screen as described above, the limiting block has a first side end and a second side end which are oppositely arranged. The first side end can abut against the first end wall when the screen rotates to the storage position, and the second side end can abut against the first end wall when the screen rotates to the unfolded position. The method for limiting the rotation of the vehicle-mounted ceiling screen includes: obtaining the real-time current information of the driving motor and the real-time state information of the first contact switch and the second contact switch; where the real-time current information includes the current intensity measured by the current sensor within a rated time, and the real-time state information includes that the first contact switch or the second contact switch is triggered or closed; if the real-time current information meets the current preset condition, and the real-time state information meets the switch preset condition, controlling the driving motor to stop, and at this time the screen reaches the unfolded position or the storage position; where the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold, and the switch preset condition is that the first contact switch or the second contact switch is in a triggered state.
[0015] In one embodiment, the in-vehicle ceiling screen further includes an alarm; after obtaining the real-time current information of the driving motor and the real-time state information of the first contact switch and the second contact switch, the following steps are further included: if the real-time current information meets the current preset condition, or the real-time state information meets the switch preset condition, control the alarm to operate and control the driving motor to stop, indicating a device failure at this time.
[0016] In the technical solution of the present invention, a first limiting portion is provided on the gearbox, and a second limiting portion is provided on the limiting member, so that the limiting member has a limiting position where the limiting block abuts against the first end wall or the second end wall during rotation. At these two positions, the limiting member is blocked from rotating. During the operation of the gearbox, the transmission structure and the limiting member rotate the power of the input shaft to the output shaft, driving the output shaft to rotate. When the output shaft rotates to a specified position, the limiting member can stop under the action of the limiting block and the limiting groove. By providing the second limiting portion on the limiting member, mechanical limiting is achieved through the limiting member. The strength requirement of the limiting member is relatively low, the service life is long, the limiting cost is low, and the effect is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0018] Figure 1 It is a partial structural schematic diagram of an embodiment of the gearbox provided by the present invention;
[0019] Figure 2 is Figure 1 the structural schematic diagram of the limiting member in;
[0020] Figure 3 It is a step schematic diagram of a rotation limiting method for an in-vehicle ceiling screen provided by the present invention;
[0021] Figure 4 It is a step schematic diagram of another rotation limiting method for an in-vehicle ceiling screen provided by the present invention;
[0022] Figure 5 It is a device structure schematic diagram of the hardware operating environment involved in the rotation limiting method of the in-vehicle ceiling screen in the embodiment of the present application.
[0023] Explanation of the reference numerals in the drawings:
[0024] 100. Gearbox; 1. Installation side; 11. Limit block; 2. Limiting member; 21. Limiting groove; 22. Bearing; 23. Rotating shaft; 24. Tooth ring; 3. Output shaft.
[0025] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications 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.
[0028] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.
[0029] In order to prevent the on-vehicle ceiling screen from being flipped at an excessive angle to damage the structural members, a mechanical limiting structure needs to be used. The mechanical limiting structure can also play roles such as software debugging for zero finding, preventing the reduction of control accuracy during long-term operation, and zero calibration during abnormal shutdown.
[0030] Currently, the limiting structure of the gearbox of the in-vehicle ceiling screen is arranged on the gearbox body and the output shaft. A limiting small protrusion is added on the circumferential side of the output shaft. When it rotates a certain angle, it contacts the box wall, so that the output shaft of the gearbox can only rotate back and forth by a specified angle, so that the ceiling screen can be at a specified angle from the open screen to the closed screen, achieving the purpose of mechanical limitation. This mechanical limitation not only increases the material cost due to the addition of the output shaft, but also has insufficient strength and poor durability.
[0031] Based on this, the present invention proposes a gearbox 100. Please refer to Figure 1 With Figure 2 , in an embodiment of the present invention, the gearbox 100 includes a box body, a limiting member 2, an input shaft and an output shaft 3, and a transmission structure; an installation side 1 is formed on a side wall of the inner cavity of the box body in a first direction, and a first limiting portion is provided on the installation side 1; the limiting member 2 is rotatably installed on the installation side 1 around an axis extending in the first direction, and a second limiting portion corresponding to the first limiting block 11 is provided at one end of the limiting member 2 facing the installation side 1; the input shaft passes through the installation side 1 and is offset from the limiting member 2 in a second direction or a third direction, the output shaft 3 passes through the side wall of the box body opposite to the installation side 1 for connecting with a driving device, and the output shaft 3 is used for connecting with a driven device; the transmission structure is arranged in the inner cavity of the box body and is in transmission connection with the limiting member 2, the input shaft and the output shaft 3; one of the first limiting portion and the second limiting portion is a limiting block 11, and the other is a limiting groove 21. The limiting groove 21 is arc-shaped and has a first end wall and a second end wall arranged along the circumferential direction of the limiting member 2. The limiting block 11 can be slidably installed in the limiting groove 21, and during the rotation of the limiting member 2, the limiting block 11 can abut against the first end wall or the second end wall.
[0032] The technical solution of the present invention sets a first limiting portion on the gearbox 100 and a second limiting portion on the limiting member 2, so that the limiting member 2 has a limiting position where the limiting block 11 abuts against the first end wall or the second end wall during the rotation process. At these two positions, the limiting member 2 is blocked to stop rotating. During the operation of the gearbox 100, the transmission structure and the limiting member 2 rotate the power of the input shaft to the output shaft 3 to drive the output shaft 3 to rotate. When the output shaft 3 rotates to a specified position, the limiting member 2 can stop under the action of the limiting block 11 and the limiting groove 21. By setting the second limiting portion on the limiting member 2, mechanical limitation is realized through the setting of the limiting member 2. The strength requirement of the limiting member 2 is relatively low, the service life is long, the limiting cost is low, and the effect is good.
[0033] Among them, the input shaft and the output shaft 3 are passed through the side wall of the box body. The "passing through" is realized by the reserved holes in the side wall, and the input shaft and the output shaft 3 can rotate around their axes. Specifically, bearings 22 are arranged in the reserved holes. The inner ring of the bearing 22 is fixedly connected to the shaft, and the outer ring is in contact with the inner surface of the side wall of the box body, reducing friction, ensuring the smooth rotation of the shaft, and extending the service life.
[0034] It should be noted that the present invention does not limit the specific form of the transmission structure, the relative position of the limiting member 2 in the transmission structure, and the extending direction of the input shaft and the output shaft 3, which can be selected and set according to specific needs:
[0035] In the first embodiment, the transmission structure includes a plurality of transmission gears. The plurality of transmission gears are all rotatably mounted on a side wall around an axis along the first direction. Each adjacent two transmission gears are meshed with each other. The limiting member 2 is meshed with one of the plurality of transmission gears and is coaxially arranged with the output shaft 3. The output shaft 3 is fixedly connected to the middle of the limiting member 2 and is coaxially arranged;
[0036] In the second embodiment, the moving structure includes a plurality of transmission gears. The plurality of transmission gears are all rotatably mounted on a side wall around an axis along the first direction. The limiting member 2 is arranged between two adjacent transmission gears and is meshed with the transmission gears;
[0037] The above two embodiments can be provided with parallel input shafts and output shafts 3. The input shaft and the output shaft 3 can be passed through the same side wall, or can be respectively passed through two opposite side walls of the box body. In the third embodiment, the transmission structure includes a plurality of transmission gears. Among the plurality of transmission gears, some transmission gear axes are along the second direction and are the first transmission gears, and the remaining transmission gear axes are along one direction and are the second transmission gears. The adjacent first transmission gear and the second transmission gear are bevel gears. The above structure enables the input shaft and the output shaft 3 to be respectively passed through two adjacent side walls of the box body;
[0038] In the fourth embodiment, the transmission structure further includes a worm and worm gear structure or a lead screw structure.
[0039] Furthermore, in the long transmission chain of a large conveyor, the limiting member 2 can be arranged at a certain distance to avoid local overload conduction.
[0040] In an embodiment of the present invention, the limiting member 2 is provided as a limiting gear; the transmission structure includes a plurality of transmission gears, and the plurality of transmission gears are all rotatably mounted on the mounting side 1 around an axis along the first direction. Two adjacent transmission gears mesh with each other. One of the plurality of transmission gears is in transmission connection with the input shaft, and another one of the plurality of transmission gears meshes with the limiting gear to drive the limiting gear to rotate; the limiting gear is coaxially arranged with the output shaft 3 to drive the output shaft 3 to rotate. In this way, by setting the limiting member 2 as a limiting gear, not only the transmission structure is simplified, but also the limiting accuracy and stability are improved, and the limiting gear is arranged at the position closest to the output shaft 3, that is, set as the last-stage gear, further optimizing the power transmission path, reducing energy loss, and ensuring the smooth operation and high-efficiency output of the entire transmission system.
[0041] Wherein, the mounting surface is provided with a mounting groove, and the limiting block 11 is arranged on the periphery of the mounting groove; the limiting gear includes a bearing 22, a rotating shaft 23 and a toothed ring 24; the bearing 22 is embedded in the mounting groove; the rotating shaft 23 is coaxially arranged with the output shaft 3, and one end is connected to the inner ring of the bearing 22; the other end is connected to the output shaft 3 through a flat key; the toothed ring 24 is sleeved on the rotating shaft 23 to drive the rotating shaft 23 to rotate, and the limiting groove 21 is opened on the end surface of the toothed ring 24 facing the mounting plate.
[0042] Furthermore, the limiting effect of the limiting gear can be improved by increasing the transmission ratio. Specifically, the number of teeth of the limiting gear can be increased or the number of teeth of the transmission gear meshing with it can be reduced.
[0043] In an embodiment of the present invention, buffer pads are attached to the first end wall and the second end wall of the limiting groove 21 for buffering when the limiting block 11 abuts against the first end wall and the second end wall. In this way, when the limiting member 2 rotates to a specified position and the limiting block 11 abuts against the first end wall or the second end wall, the buffer pads can reduce the impact force to extend the service life and reduce noise.
[0044] The present invention also proposes an in-vehicle ceiling screen, which includes a driving motor, a gearbox 100, a screen, a detection member and a control device; the specific structure of the gearbox 100 refers to the above embodiment. Since the in-vehicle ceiling screen adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.
[0045] Among them, the drive motor is used to be installed in the vehicle; the screen is used to be installed in the vehicle and is connected to the end of the output shaft 3 outside the box body. The screen has a storage position and a deployment position during rotation. When the limiting block 11 abuts against the first end wall, the screen rotates to the storage position. When the limiting block 11 abuts against the second end wall, the screen rotates to the deployment position; the detection member includes a current sensor, and the current sensor is electrically connected to the motor to detect the current of the motor; the control device is electrically connected to the drive motor and the current sensor.
[0046] The technical solution of the present invention limits the in-vehicle ceiling screen by providing the limiting block 11 and the limiting groove 21. When the drive motor drives the in-vehicle ceiling screen to rotate to the storage position, the limiting block 11 abuts against the first end wall. When the drive motor drives the in-vehicle ceiling screen to rotate to the deployment position, the limiting block 11 abuts against the second end wall. When the limiting block 11 abuts against the first end wall or the second end wall, the rotation of the motor is blocked, the current intensity increases, the current sensor detects the current change, and the control device stops the motor operation immediately after receiving the signal. In this way, accurate limiting is achieved, over-rotation is avoided, stable switching of the screen is ensured, the use safety and operation convenience are improved, and the equipment life is prolonged.
[0047] Judging whether the limiting block 11 contacts the end wall through the current intensity may have a risk of misjudgment in some cases. For example, when there is a fault in the transmission structure or external interference causes current fluctuations, the shutdown may be triggered erroneously. Based on this, in an embodiment of the present invention, the limiting block 11 has a first side end and a second side end arranged oppositely. The first side end can abut against the first end wall when the screen rotates to the storage position, and the second side end can abut against the first end wall when the screen rotates to the deployment position; the detection member further includes a first contact switch and a second contact switch; the first contact switch is arranged on the first end wall or the first side end and is electrically connected to the control device; the second contact switch is arranged on the second end wall or the second side end and is electrically connected to the control device. In this way, when the screen rotates to the storage position, the first contact switch triggers a signal, and at the same time the current sensor detects the current change, and the control device receives two signals at the same time and immediately stops the motor operation; similarly, when the screen rotates to the deployment position, the second contact switch triggers a signal, the current sensor detects the current change again, and the control device synchronously receives two signals and immediately stops the motor operation; in this way, under the double-signal trigger mechanism, the risk of misjudgment of a single signal is avoided, and the accuracy and reliability of the limiting action are ensured.
[0048] When the transmission structure fails, the first contact switch or the second contact switch may not trigger a signal, but the current sensor can still detect an abnormal current. Based on this, in an embodiment of the present invention, the in-vehicle ceiling screen further includes an alarm, and the alarm is electrically connected to the control device. In this way, when the transmission structure fails, the alarm will issue an alarm according to the abnormal signal of the current sensor, reminding the user to check in time, further improving the safety and maintenance convenience of the system, and ensuring that the device can operate stably under various conditions.
[0049] In an embodiment of the present invention, a worm and worm gear structure is provided between the limiting member 2 and the input shaft. The worm of the worm and worm gear structure is coaxially connected to the limiting member 2, and the worm gear of the worm and worm gear structure is drivingly connected to the input shaft. In this way, the rotation of the worm drives the worm gear to achieve precise limit control, enhancing the transmission stability. And when the driving motor stops, the self-locking characteristic of the worm and worm gear effectively prevents the screen from rebounding, further improving the limit precision and safety, and ensuring that the device can operate stably and reliably under various use environments.
[0050] Please refer to Figure 3 , the present invention also proposes a method for limiting the rotation of an in-vehicle ceiling screen. Based on the above-mentioned in-vehicle ceiling screen, the specific structure of the in-vehicle ceiling screen refers to the above embodiments. Since the in-vehicle ceiling screen adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.
[0051] The method for limiting the rotation of the in-vehicle ceiling screen includes:
[0052] S10. Obtain the real-time current information of the driving motor;
[0053] Wherein, the real-time current information includes the current intensity measured by the current sensor within a rated time.
[0054] S20. If the real-time current information meets the current preset condition, control the driving motor to stop, and at this time the screen reaches the unfolded position or the stored position;
[0055] Wherein, the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold.
[0056] In the technical solution of the present invention, by monitoring the real-time current information and setting the current preset condition, when the real-time current information meets the current preset condition, it is determined that the limiting block 11 abuts against the first end wall or the second end wall, and the motor is controlled to stop. At this time, the screen reaches the predetermined position to avoid overshoot or underreach phenomena, and improve the user experience and device reliability.
[0057] Please refer to Figure 4, the present invention also provides another method for rotating and limiting a vehicle-mounted ceiling screen. Based on the vehicle-mounted ceiling screen described above, the specific structure of the vehicle-mounted ceiling screen refers to the above embodiments. Since the vehicle-mounted ceiling screen adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. The limiting block 11 has a first side end and a second side end arranged opposite to each other. The first side end can abut against the first end wall when the screen rotates to the storage position, and the second side end can abut against the first end wall when the screen rotates to the unfolded position. The method for rotating and limiting the vehicle-mounted ceiling screen includes:
[0058] S10’: Obtain the real-time current information of the drive motor and the real-time state information of the first contact switch and the second contact switch;
[0059] Wherein, the real-time current information includes the current intensity measured by the current sensor within the rated time, and the real-time state information includes the triggering or closing of the first contact switch or the second contact switch.
[0060] S20’: If the real-time current information meets the current preset condition and the real-time state information meets the switch preset condition, control the drive motor to stop. At this time, the screen reaches the unfolded position or the storage position;
[0061] Wherein, the current preset condition is that the peak value of the current intensity measured by the current sensor within the rated time is greater than the preset current threshold, and the switch preset condition is that the first contact switch or the second contact switch is in the triggered state.
[0062] In the technical solution of the present invention, by monitoring the real-time current information of the drive motor and the real-time state information of the first contact switch and the second contact switch, when the real-time current information meets the current preset condition and the real-time state information meets the switch preset condition, it is determined that the limiting block 11 abuts against the first end wall or the second end wall, and the motor is controlled to stop. At this time, the screen reaches the predetermined position to avoid overshoot or underreach phenomena, and improve the user experience and equipment reliability.
[0063] In an embodiment of the present invention, the vehicle-mounted ceiling screen further includes an alarm; after the step S20’, the following further includes:
[0064] If the real-time current information meets the current preset condition, or the real-time state information meets the switch preset condition, control the alarm to work and control the drive motor to stop. At this time, there is a device failure.
[0065] Thus, when one of the real-time current information of the drive motor and the real-time state information of the first contact switch and the second contact switch meets a preset condition, it is determined that the system has a fault, and the alarm is controlled to work and the drive motor is controlled to stop to prevent equipment damage.
[0066] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.
[0067] Please refer to Figure 5 , this application also provides a computer-readable storage medium, having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the rotation limiting method of the in-vehicle ceiling screen in the above embodiments.
[0068] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium containing or storing a program, and the program can be used by or in combination with an instruction execution system, device, or device. The program code contained on the computer-readable storage medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.
[0069] The above computer-readable storage medium can be included in the control device of the in-vehicle ceiling screen; it can also exist alone without being assembled into the in-vehicle ceiling screen.
[0070] The above computer-readable storage medium stores one or more programs, which, when executed by the in-vehicle ceiling screen, cause the in-vehicle ceiling screen to: S10. Obtain real-time current information of the drive motor; wherein, the real-time current information includes the current intensity measured by the current sensor within a rated time; S20. If the real-time current information meets the current preset condition, control the drive motor to stop, at which time the screen reaches the deployed position or the stowed position; wherein, the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold.
[0071] Computer program code for performing the operations of the present application may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may execute entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).
[0072] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.
[0073] The modules described in the embodiments of the present application may be implemented in software or in hardware. Wherein, the name of the module does not constitute a limitation to the unit itself in some cases.
[0074] The readable storage medium provided by this application is a computer-readable storage medium. The computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned rotation limiting method of the in-vehicle ceiling screen, which can solve the technical problem of high cost of in-vehicle ceiling screen limiting. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by this application are the same as those of the in-vehicle ceiling screen provided in the above embodiments, and will not be elaborated here.
[0075] This application also provides a computer program product, including a computer program, which when executed by a processor implements the steps of the in-vehicle ceiling screen as described above.
[0076] The computer program product provided by this application can solve the technical problem of high limiting cost. Compared with the prior art, the beneficial effects of the computer program product provided by this application are the same as those of the rotation limiting method of the in-vehicle ceiling screen provided in the above embodiments, and will not be elaborated here.
[0077] The above are only some embodiments of this application, and do not limit the patent scope of this application accordingly. All equivalent structural transformations made under the technical concept of this application by using the content of the specification and drawings of this application, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of this application.
Claims
1. A gearbox, characterized in that, The gearbox includes: A housing, one side wall of the inner cavity of the housing in a first direction forms an installation side, and a first limiting portion is provided on the installation side; A limiting member, rotatably installed on the installation side around an axis extending in the first direction, and a second limiting portion corresponding to the first limiting block is provided at one end of the limiting member facing the installation side; An input shaft and an output shaft, the input shaft penetrates through the installation side and is offset from the limiting member in a second direction or a third direction, the output shaft penetrates through the side wall of the housing opposite to, adjacent to, or the same as the installation side for connection with a driving device, and the output shaft is used for connection with a driven device; and, A transmission structure, disposed in the inner cavity of the housing, and transmission-connected to the limiting member, the input shaft, and the output shaft; One of the first limiting portion and the second limiting portion is a limiting block, and the other is a limiting groove. The limiting groove is arc-shaped and has a first end wall and a second end wall arranged along the circumferential direction of the limiting member. The limiting block can be slidably installed in the limiting groove, and during the rotation of the limiting member, the limiting block can abut against the first end wall or the second end wall.
2. The limiting device according to claim 1, characterized in that The limiting member is arranged as a limiting gear; the transmission structure includes a plurality of transmission gears, and the plurality of transmission gears are all rotatably installed on the installation side around an axis in the first direction. Adjacent two of the plurality of transmission gears are meshed with each other. One of the plurality of transmission gears is transmission-connected to the input shaft, and another one of the plurality of transmission gears is meshed with the limiting gear to drive the limiting gear to rotate; The limiting gear is coaxially arranged with the output shaft to drive the output shaft to rotate.
3. The limit device according to claim 1, wherein, Buffer pads are attached to the first end wall and the second end wall of the limiting groove for buffering when the limiting block abuts against the first end wall and the second end wall.
4. A vehicle-mounted ceiling screen, characterized in that, The in-vehicle ceiling screen includes: A driving motor for being installed in a vehicle; The gearbox according to any one of claims 1-3, and the input shaft is connected to the main shaft of the driving motor; A screen for being installed in a vehicle and connected to the end portion of the output shaft outside the housing. The screen has a storage position and a deployment position during rotation. When the limiting block abuts against the first end wall, the screen rotates to the storage position, and when the limiting block abuts against the second end wall, the screen rotates to the deployment position; A detection member, including a current sensor, and the current sensor is electrically connected to the motor to detect the current of the motor; And, A control device, electrically connected to the driving motor and the current sensor.
5. The in-vehicle ceiling-mounted screen according to claim 4, wherein, The limiting block has a first side end and a second side end arranged oppositely. The first side end can abut against the first end wall when the screen rotates to the storage position, and the second side end can abut against the first end wall when the screen rotates to the deployment position; The detection member further includes: A first contact switch, arranged on the first end wall or the first side end and electrically connected to the control device; A second contact switch, arranged on the second end wall or the second side end and electrically connected to the control device.
6. The in-vehicle ceiling-mounted screen according to claim 5, wherein, The in-vehicle ceiling screen further includes an alarm, and the alarm is electrically connected to the control device.
7. The in-vehicle ceiling-mounted screen according to claim 4, characterized in that A worm and worm gear structure is provided between the limiting member and the input shaft. The worm of the worm and worm gear structure is coaxially connected to the limiting member, and the worm gear of the worm and worm gear structure is drivingly connected to the input shaft.
8. A rotation limiting method for an in-vehicle ceiling screen, characterized in that, Based on the in-vehicle ceiling screen according to any one of claims 4-7, the method for limiting the rotation of the in-vehicle ceiling screen includes: Obtaining real-time current information of the driving motor, where the real-time current information includes the current intensity measured by the current sensor within a rated time; If the real-time current information meets the current preset condition, controlling the driving motor to stop, at this time the screen reaches the unfolded position or the retracted position; where the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold.
9. A rotation limiting method for an in-vehicle ceiling screen, characterized in that, Based on the in-vehicle ceiling screen according to any one of claims 4-7, the limiting block has a first side end and a second side end arranged oppositely. The first side end can abut against the first end wall when the screen rotates to the retracted position, and the second side end can abut against the first end wall when the screen rotates to the unfolded position; The method for limiting the rotation of the in-vehicle ceiling screen includes: Obtaining the real-time current information of the driving motor and the real-time state information of the first contact switch and the second contact switch; where the real-time current information includes the current intensity measured by the current sensor within a rated time, and the real-time state information includes that the first contact switch or the second contact switch is triggered or closed; If the real-time current information meets the current preset condition and the real-time state information meets the switch preset condition, controlling the driving motor to stop, at this time the screen reaches the unfolded position or the retracted position; where the current preset condition is that the peak value of the current intensity measured by the current sensor within a rated time is greater than a preset current threshold, and the switch preset condition is that the first contact switch or the second contact switch is in a triggered state.
10. The rotational limit method of the in-vehicle ceiling screen according to claim 9, characterized in that, characterized in that, The in-vehicle ceiling screen further includes an alarm; After obtaining the real-time current information of the driving motor and the real-time state information of the first contact switch and the second contact switch, it further includes: If the real-time current information meets the current preset condition, or the real-time state information meets the switch preset condition, controlling the alarm to work and controlling the driving motor to stop, at this time there is a device failure.