An automatic lifting device

Abstract

The utility model discloses an automatic elevating gear, including motor, lift bar, transmission locking piece, screw and pneumatic spring, the motor is installed at the top of the vehicle body, and the one end of lift bar is provided with transmission hole, and the transmission hole is provided with the notched, and the opposite two inner walls of notched all are provided with the threaded hole, and the screw is connected with two threaded holes screw thread and makes transmission hole joint in the outer wall of transmission locking piece, and the inner wall of transmission locking piece is connected with motor drive, and the other end of lift bar is hinged with camera assembly, and the both ends of pneumatic spring are respectively hinged with vehicle body and camera assembly, through the setting of transmission locking piece, the unloading structure of lift bar is constituted, avoids motor jam, and then through pneumatic spring device, guarantees the motor only to provide the initial kinetic energy upwards or downwards in the lifting process, and the power of pneumatic spring is responsible for upward or downward shrink, avoids motor all output maximum torque, and further improves the stability of camera assembly and the service life of motor.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, specifically to an automatic lifting device. Background Technology

[0002] Pipelines are a widely used means of material transportation in industries such as industry, energy, military equipment, and urban construction. Urban sewage, natural gas, industrial material transportation, water supply and drainage, and building ventilation systems all utilize numerous complex and concealed pipelines. Ensuring the safety and effectiveness of these pipeline systems is crucial. However, with increasing service life, pipelines inevitably experience aging, cracks, corrosion, or damage from external construction. Therefore, regular pipeline inspection and maintenance are essential. For example, the Chinese invention patent CN101915339B, entitled "Pipeline Robot," includes a mobile carrier comprising a body, wheels, a flexible axle connecting the body and wheels, and a mechanism connecting the body and flexible wheels. The system includes a shaft connection and a rocker-slider mechanism for adjusting the angle between the wheels and the body; the main body of the pipeline robot also includes a base on the mobile carrier, a gimbal, a rod mechanism connecting the gimbal and the base, a light on the gimbal, and a camera connected to the gimbal; for example, Chinese invention patent application CN110529691A, entitled "Pipeline Inspection Robot," includes a body connected with cables, a camera device mounted on the body via a lifting device, and tires mounted on the body via a drive device. The drive device includes a drive motor located inside the body and a sprocket assembly connected to the drive motor via a shaft. The tires are connected to the sprocket assembly via a shaft; the drive motor drives the sprocket assembly to rotate, the sprocket assembly drives the tires to rotate, and the tires drive the pipeline inspection robot to move.

[0003] The automatic lifting components of the pipeline inspection machines in the two patent documents mentioned above both use a parallelogram-shaped structure on one side and a motor to drive one end to rotate upwards and downwards. However, such a design has a short service life because there is a large camera at the top of the lifting component, which increases the weight at the top. Excessive weight at the top will cause the lifting structure to require a lot of force when it starts to rise. Also, when the top rises to its limit and hits the inner wall of the pipeline, poor torque control of the motor can easily cause the motor to break or the lifting transmission gear to break, thus reducing the service life. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose an automatic lifting device to solve the technical problem that the motor has a short service life due to excessive weight at the top of the lifting component in the prior art.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an automatic lifting device, including a vehicle body, a camera assembly, and a lifting assembly. The lifting assembly includes a motor, a lifting rod, a transmission locking block, a screw, and a gas spring. The motor is mounted on the top of the vehicle body. One end of the lifting rod has a transmission hole with a slot. The two inner walls of the slot have threaded holes, which are coaxially arranged. The screw is threadedly connected to the two threaded holes, causing the transmission hole to engage with the outer wall of the transmission locking block. The inner wall of the transmission locking block is connected to the motor. The other end of the lifting rod is hinged to the camera assembly. Both ends of the gas spring are hinged to the vehicle body and the camera assembly, respectively.

[0007] In some embodiments, the lifting rods and the transmission locking blocks are arranged in pairs, with the two lifting rods positioned opposite each other on both sides of the vehicle body. The transmission holes at one end of the two lifting rods correspond one-to-one with the two transmission locking blocks, and both transmission locking blocks are connected to the motor. The other end of the two lifting rods is hinged to the camera assembly.

[0008] In some embodiments, a rotating shaft is sleeved between the two transmission locking blocks, a worm gear is fixedly sleeved on the side wall of the rotating shaft, and a worm is fixedly connected to the movable end of the motor, with the worm gear meshing with the worm.

[0009] In some embodiments, a limiter is fitted on the outer wall of the rotating shaft.

[0010] In some embodiments, a plate is installed between the two lifting rods.

[0011] In some embodiments, the gas springs are arranged in pairs, with the two gas springs positioned opposite each other on both sides of the vehicle body, and the two ends of the two gas springs being hinged to the vehicle body and the camera assembly, respectively.

[0012] In some embodiments, both of the gas springs are adjustable.

[0013] In some embodiments, the lifting assembly further includes a lifting auxiliary rod located between the lifting rod and the gas spring, with both ends of the lifting auxiliary rod hinged to the vehicle body and the camera assembly, respectively.

[0014] In some embodiments, the lifting auxiliary rods are arranged in pairs, with the two lifting auxiliary rods positioned opposite each other on both sides of the vehicle body.

[0015] In some embodiments, a reinforcing rod is provided between the two lifting auxiliary rods.

[0016] Compared with the prior art, the automatic lifting device provided by this utility model forms a force-relieving structure for the lifting rod by setting a transmission locking block, which prevents the motor from jamming. Furthermore, the pneumatic spring device ensures that the motor only provides initial upward or downward kinetic energy during the lifting process, while the pneumatic spring is responsible for the upward pushing or downward retraction force, preventing the motor from continuously outputting maximum torque, thereby improving the stability of the camera component and the service life of the motor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional drawing of an automatic lifting device provided in an embodiment of this utility model;

[0018] Figure 2 yes Figure 1 Internal structure diagram;

[0019] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0020] Figure 4 yes Figure 3 Schematic diagram showing the connection relationship between the middle screw and the lifting rod;

[0021] Figure 5 yes Figure 3 A schematic diagram of the structure of the central transmission locking block.

[0022] Explanation of reference numerals in the attached drawings: 1. Vehicle body; 2. Camera assembly; 3. Lifting assembly; 31. Motor; 311. Worm gear; 32. Lifting rod; 321. Transmission hole; 322. Groove; 323. Threaded hole; 324. Flat plate; 33. Transmission locking block; 34. Screw; 35. Gas spring; 36. Rotating shaft; 361. Worm gear; 362. Limiter; 37. Lifting auxiliary rod; 371. Reinforcing rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0024] To address the technical problem of short motor lifespan due to excessive weight at the top of the lifting assembly, this utility model provides an automatic lifting device that can improve the motor's lifespan.

[0025] It should be noted that the automatic lifting device described in this utility model is used in, but not limited to, pipeline robots. For ease of explanation, this utility model only uses an automatic lifting device applied to a pipeline robot as an example for illustration. The principle of an automatic lifting device applied to other types of equipment is essentially the same as that applied to a pipeline robot, and will not be described in detail here.

[0026] Please see Figures 1 to 5 ,in Figure 1 This is a schematic diagram of an automatic lifting device according to an embodiment of the present invention. The automatic lifting device includes a vehicle body 1, a camera assembly 2, and a lifting assembly 3. The lifting assembly 3 includes a motor 31, a lifting rod 32, a transmission locking block 33, a screw 34, and a gas spring 35. The motor 31 is installed on the top of the vehicle body 1. One end of the lifting rod 32 has a transmission hole 321. The transmission hole 321 has a slot 322. The two inner walls of the slot 322 have threaded holes 323, and the two threaded holes 323 are coaxially arranged. The screw 34 is threadedly connected to the two threaded holes 323, so that the transmission hole 321 is engaged with the outer wall of the transmission locking block 33. The inner wall of the transmission locking block 33 is connected to the motor 31. The other end of the lifting rod 32 is hinged to the camera assembly 2. The two ends of the gas spring 35 are respectively hinged to the vehicle body 1 and the camera assembly 2.

[0027] In this embodiment, the transmission locking block 33 forms a force-relieving structure for the lifting rod 32, preventing the motor 31 from jamming. The pneumatic spring 35 device ensures that during the lifting process, the motor 31 only provides initial upward or downward kinetic energy, while the pneumatic spring 35 is responsible for the upward or downward force, preventing the motor 31 from continuously outputting maximum torque, thereby improving the stability of the camera assembly 2 and the service life of the motor 31.

[0028] Furthermore, the force of the screw 34 locking can drive the lifting rod 32 to rise or fall when it does not touch the top inner wall of the pipe. When it touches the pipe, the torque of the motor 31 is about 14 N.m. At this time, the transmission locking block 33 behind it can only withstand about 10 N.m of force under the action of the screw 34. At this time, the force is released and the motor 31 is guaranteed to have no problems.

[0029] In one embodiment, the lifting rods 32 and the transmission locking blocks 33 are arranged in pairs. The two lifting rods 32 are arranged opposite each other on both sides of the vehicle body 1. The transmission holes 321 at one end of the two lifting rods 32 correspond one-to-one with the two transmission locking blocks 33. The two transmission locking blocks 33 are both connected to the motor 31. The other end of the two lifting rods 32 is hinged to the camera assembly 2.

[0030] In this embodiment, in order for the camera assembly 2 to achieve a better horizontal state, both ends of the lifting rod 32 are provided with a certain curvature.

[0031] In one embodiment, a rotating shaft 36 is sleeved between the two transmission locking blocks 33, and a worm gear 361 is fixedly sleeved on the side wall of the rotating shaft 36. A worm 311 is fixedly connected to the movable end of the motor 31, and the worm gear 361 meshes with the worm 311.

[0032] In this embodiment, the motor 31 drives the worm gear 311 to rotate, the worm gear 311 drives the worm wheel 361 to rotate, the worm wheel 361 drives the rotating shaft 36 to rotate, and thus the rotating shaft 36 drives the transmission locking blocks 33 at both ends to rotate synchronously, thereby realizing the synchronous rotation of the two lifting rods 32.

[0033] In one embodiment, a limiter 362 is fitted on the outer wall of the rotating shaft 36.

[0034] In this embodiment, the 90° limit is used for sensor position calibration to prevent the rotating shaft 36 from driving the lifting rod 32 to rotate more than 90° and causing damage.

[0035] In one embodiment, a flat plate 324 is installed between the two lifting rods 32.

[0036] In this embodiment, it is convenient to install a nameplate or precautions.

[0037] In one embodiment, the gas springs 35 are arranged in pairs, with the two gas springs 35 positioned opposite each other on both sides of the vehicle body 1, and the two ends of the two gas springs 35 are respectively hinged to the vehicle body 1 and the camera assembly 2.

[0038] In this embodiment, the pneumatic spring 35 ensures that the camera assembly 2 is not continuously driven and locked by the motor 31 when it rises or falls from the plane or from the top. The power required for the ascent is converted into the original power of the pneumatic spring 35, which ensures that the motor 31 is not damaged and that the motor 31 does not operate under high load during the ascent and descent, thereby extending its service life. At the same time, the lifting assembly 3 moves at a constant speed during the movement, without having to suddenly release all torque in the middle and later stages because it needs to generate all torque at the lowest point. This phenomenon would cause the ascent to be very slow at the beginning and then suddenly very fast at the end, and the descent to be very slow at the beginning and then very fast at the end. This would cause the image of the camera assembly 2 in front of the robot to suddenly shake up and down, affecting the survey effect.

[0039] In one embodiment, both gas springs 35 are adjustable.

[0040] In this embodiment, the air spring 35 is adjustable and can automatically adjust the air pressure and spring stiffness according to different conditions such as vehicle speed and load.

[0041] In one embodiment, the lifting assembly 3 further includes a lifting auxiliary rod 37, which is located between the lifting rod 32 and the gas spring 35. The two ends of the lifting auxiliary rod 37 are respectively hinged to the vehicle body 1 and the camera assembly 2.

[0042] In one embodiment, the lifting auxiliary rods 37 are arranged in pairs, with the two lifting auxiliary rods 37 arranged opposite each other on both sides of the vehicle body 1.

[0043] In this embodiment, the two ends of the two lifting auxiliary rods 37 are hinged to the vehicle body 1 and the camera assembly 2 respectively, which further improves the stability of the lifting assembly 3 during the lifting process, that is, improves the image stability of the camera assembly 2.

[0044] In one embodiment, a reinforcing rod 371 is provided between the two lifting auxiliary rods 37.

[0045] In this embodiment, the stability of the two lifting auxiliary rods 37 is improved.

[0046] To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail below:

[0047] First, the motor 31 drives the worm gear 311 to rotate, and the rotation of the rotating shaft 36 is achieved by the transmission principle of the worm wheel 361 and the worm gear 311. The rotating shaft 36 drives the two transmission locking blocks 33 to rotate synchronously, thereby realizing the synchronous upward movement of the two lifting rods 32. At the same time, the two pneumatic springs 35 unlock and provide upward force, and the lifting auxiliary rod 37 also moves upward. Then, when the motor 31 stops, the pneumatic springs 35 stop moving and maintain torque to support the camera component 2. This lifting mechanism can stop at any time during the lifting process. For example, when it rises to the middle position, the motor 31 stops after it no longer provides upward power. Compared with the absence of pneumatic springs 35, the motor 31 does not need to be locked indefinitely to achieve the hovering action at any point, avoiding damage to the motor 31 and the transmission locking blocks 33. Moreover, the long-term hovering does not require the maximum torque at the moment of motor 31 start-up, avoiding the motor 31 being under maximum torque working load all the time. Thus, the service life of the motor 31 is improved.

[0048] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An automatic lifting device, characterized in that, include: Vehicle body; Camera components; as well as The lifting assembly includes a motor, a lifting rod, a transmission locking block, screws, and a gas spring. The motor is mounted on the top of the vehicle body. One end of the lifting rod has a transmission hole with a slot. The two inner walls of the slot have threaded holes, which are coaxially arranged. The screw is threadedly connected to the two threaded holes, causing the transmission hole to engage with the outer wall of the transmission locking block. The inner wall of the transmission locking block is connected to the motor. The other end of the lifting rod is hinged to the camera assembly. Both ends of the gas spring are hinged to the vehicle body and the camera assembly, respectively.

2. The automatic lifting device according to claim 1, characterized in that, The lifting rods and the transmission locking blocks are arranged in pairs. The two lifting rods are arranged opposite each other on both sides of the vehicle body. The transmission holes at one end of the two lifting rods correspond one-to-one with the two transmission locking blocks. The two transmission locking blocks are connected to the motor for transmission. The other end of the two lifting rods is hinged to the camera assembly.

3. An automatic lifting device according to claim 2, characterized in that, A rotating shaft is sleeved between the two transmission locking blocks. A worm gear is fixedly sleeved on the side wall of the rotating shaft. A worm is fixedly connected to the movable end of the motor. The worm gear meshes with the worm.

4. An automatic lifting device according to claim 3, characterized in that, A limiter is fitted on the outer wall of the rotating shaft.

5. An automatic lifting device according to claim 2, characterized in that, A flat plate is installed between the two lifting rods.

6. An automatic lifting device according to claim 1, characterized in that, The gas springs are arranged in pairs, with the two gas springs positioned opposite each other on both sides of the vehicle body, and the two ends of the two gas springs are respectively hinged to the vehicle body and the camera assembly.

7. An automatic lifting device according to claim 6, characterized in that, Both of the gas springs mentioned are adjustable.

8. An automatic lifting device according to claim 1, characterized in that, The lifting assembly also includes a lifting auxiliary rod, which is located between the lifting rod and the gas spring. The two ends of the lifting auxiliary rod are respectively hinged to the vehicle body and the camera assembly.

9. An automatic lifting device according to claim 8, characterized in that, The lifting auxiliary rods are arranged in pairs, with the two lifting auxiliary rods positioned opposite each other on both sides of the vehicle body.

10. An automatic lifting device according to claim 8, characterized in that, A reinforcing rod is provided between the two lifting auxiliary rods.

Images