Car lifting jack screw rod state detection device

Abstract

The utility model discloses a car lifting jack screw rod state detection device which comprises a supporting mechanism, a lifting mechanism, a lifting mechanism and a detection mechanism. The lifting mechanism comprises a bracket slidably connected to the rack in the height direction of the rack. The lifting mechanism comprises a lead screw rotationally connected to the rack, a first threaded hole matched with the lead screw is formed in the bracket, the lead screw penetrates through the first threaded hole, and a power assembly used for driving the lead screw to rotate is arranged on the rack; the beneficial effects of the utility model are that: the detection mechanism detects the rotation speed of the top and the bottom of the screw rod, which is helpful for timely finding out the possible problems of the screw rod in the operation process, such as lagging, asynchronism and the like, so that the screw rod can be maintained and repaired in advance, and the production efficiency is improved. The risk of equipment failure and damage is reduced, and meanwhile, timely state detection can guarantee the safety in the working process.

Description

Technical Field

[0001] The utility model relates to the field of car lifters, in particular to a car lifter lead screw state detection device. Background Art

[0002] The mobile car lifter unit is used for the car lifting operation at the temporary repair position in the combined garage of the main repair workshop in the vehicle depot. Each car lifting unit consists of four car lifter units, which can lift 1-6 subway vehicles or car bodies with bogies, so as to repair and replace the car body, bogie and other components.

[0003] In the related art, a car lifter system is proposed, which includes a car lifter unit at least containing four mobile car lifters and a PLC system for controlling the synchronous lifting of the car lifter unit. The mobile car lifter includes a body, a traveling mechanism arranged at the bottom of the body, a bracket mechanism that can move up and down along the body, and a lead screw vertically arranged in the body. A working nut is arranged on the lead screw in a matching manner, and the working nut is fixedly connected to the bracket mechanism. The upper end of the lead screw is rotatably hung on the top plate of the body, a driving device is arranged on the bottom plate of the body, the output end of the driving device is coaxially arranged with the lead screw, the lower end of the lead screw is fixedly connected to the output end of the driving device, and the control input end of the driving device is electrically connected to the PLC system.

[0004] Aiming at the above related technology, the following defects exist: the driving device drives the lead screw to rotate, and the lead screw drives the bracket mechanism to lift, thereby completing the lifting of the vehicle. During use, if the lead screw breaks, it cannot be detected in time, resulting in the vehicle tilting and low safety. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies, and propose a car lifter lead screw state detection device to solve the technical problem that the lead screw breakage cannot be detected in time in the prior art.

[0006] To achieve the above technical purpose, the technical solution of the utility model provides a car lifter lead screw state detection device, including a support mechanism, and the support mechanism includes a frame;

[0007] A lifting mechanism, and the lifting mechanism includes a bracket slidably connected to the frame along the height direction of the frame;

[0008] A lifting mechanism, and the lifting mechanism includes a lead screw rotatably connected to the frame. A first threaded hole adapted to the lead screw is provided on the bracket, the lead screw passes through the first threaded hole, and a power component for driving the lead screw to rotate is provided on the frame; and,

[0009] A detection mechanism, and the detection mechanism is arranged on the frame, and the detection mechanism is used for detecting the rotational speed of the top of the lead screw and the rotational speed of the bottom of the lead screw.

[0010] In some embodiments, the bracket includes a frame slidably connected to the machine frame and a carrier slidably connected to the frame along the length direction of the frame, and a driving assembly for driving the carrier to slide is provided on the frame.

[0011] In some embodiments, the driving assembly includes a runner rotatably connected to the frame, a driving gear is provided at the end of the runner, and a driven rack meshing with the driving gear is provided on the carrier.

[0012] In some embodiments, the lifting mechanism includes a motor provided at the top of the machine frame, and the output shaft of the motor is coaxially connected to the end of the lead screw.

[0013] In some embodiments, the lifting mechanism further includes a speed reducer provided at the top of the machine frame, the output shaft of the motor is coaxially connected to the input shaft of the speed reducer, and the output shaft of the speed reducer is coaxially connected to the end of the lead screw.

[0014] In some embodiments, the detection mechanism includes a processor, a display and two speed sensors provided on the machine frame. The two speed sensors are respectively located on one side of the top of the lead screw and one side of the bottom of the lead screw, and the processor, the display and the two speed sensors are electrically connected.

[0015] In some embodiments, the speed sensor is a magnetoelectric sensor.

[0016] In some embodiments, the speed sensor is connected to the machine frame by bolts. Through holes for the bolts to pass through are provided on the machine frame, and second threaded holes adapted to the bolts are provided on the speed sensor.

[0017] In some embodiments, a clamping groove is provided on the machine frame, a loosening prevention tooth block is clamped in the clamping groove, and a loosening prevention gear meshing with the loosening prevention tooth block is sleeved on the bolt.

[0018] In some embodiments, an anti-interference shell for shielding external electromagnetic interference is provided outside the speed sensor.

[0019] Compared with the prior art, the beneficial effects of the present utility model include: the detection of the rotation speeds of the top and bottom of the lead screw by the detection mechanism helps to timely discover possible problems in the operation process of the lead screw, such as jamming, non-synchronization, etc., so as to carry out maintenance and repair in advance, reduce the risk of equipment failure and damage. At the same time, timely status detection can ensure the safety during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the first perspective of the detection device provided by the present utility model;

[0021] Figure 2It is a schematic diagram of the overall structure of the second perspective of the detection device provided by the present utility model;

[0022] Figure 3 It is a cross-sectional view of the overall structure of the anti-interference shell provided by the present utility model.

[0023] Explanation of reference numerals:

[0024] 1. Support mechanism; 11. Frame; 2. Lifting mechanism; 21. Bracket; 211. Frame body; 212. Support body; 3. Lifting mechanism; 31. Lead screw; 4. Detection mechanism; 41. Rotation speed sensor; 42. Bolt; 43. Through hole; 44. Second threaded hole; 45. Card slot; 46. Anti-loosening tooth block; 47. Anti-loosening gear; 48. Anti-interference shell; 5. Power assembly; 51. Motor; 52. Reducer; 6. Driving assembly; 61. Runner; 62. Driven rack. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present 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 only used to explain the present utility model and are not used to limit the present utility model.

[0026] The present utility model provides a detection device for the state of the lead screw of a car lift, and its structure is as shown in Figure 1 - Figure 3 shown, including a support mechanism 1, a lifting mechanism 2, a lifting mechanism 3 and a detection mechanism 4.

[0027] The support mechanism 1 includes a frame 11.

[0028] The lifting mechanism 2 includes a bracket 21 slidably connected to the frame 11 along the height direction of the frame 11.

[0029] The lifting mechanism 3 includes a lead screw 31 rotatably connected to the frame 11. The bracket 21 is provided with a first threaded hole adapted to the lead screw 31. The lead screw 31 passes through the first threaded hole, and the frame 11 is provided with a power assembly 5 for driving the lead screw 31 to rotate.

[0030] The detection mechanism 4 is arranged on the frame 11, and the detection mechanism 4 is used to detect the rotation speed of the top of the lead screw 31 and the rotation speed of the bottom of the lead screw 31.

[0031] During use, the power assembly 5 drives the lead screw 31 to rotate on the frame 11. Since the lead screw 31 is adapted to the first threaded hole on the bracket 21, and the bracket 21 is slidably connected along the height direction of the frame 11, when the lead screw 31 rotates, due to the action of the thread, the bracket 21 will rise or fall along the height direction of the frame 11, thereby realizing the lifting action.

[0032] During this process, the detection mechanism 4 continuously detects the rotational speeds at the top and bottom of the lead screw 31. By monitoring the rotational speeds at these two positions, it is possible to determine whether the rotation of the lead screw 31 is stable, and whether there are abnormal conditions such as jamming or out-of-sync. If the rotational speeds at the top and bottom are inconsistent or exhibit abnormal fluctuations, it indicates that there may be a problem with the operating state of the lead screw 31, and inspection and maintenance are required.

[0033] In this utility model, the detection mechanism 4's detection of the rotational speeds at the top and bottom of the lead screw 31 helps to promptly identify possible problems that may occur during the operation of the lead screw 31, such as jamming and out-of-sync, etc., thereby enabling early maintenance and repair, reducing the risk of equipment failure and damage. At the same time, timely status detection can ensure safety during the working process.

[0034] To achieve the movement of the support body 212 in the height and horizontal directions, please refer to Figure 1 , in a preferred embodiment, the bracket 21 includes a frame body 211 slidably connected to the frame 11 and a support body 212 slidably connected to the frame body 211 along the length direction of the frame body 211. The frame body 211 is provided with a driving assembly 6 for driving the support body 212 to slide.

[0035] During use, in the bracket 21, the frame body 211 is slidably connected to the frame 11, enabling the entire frame body 211 to slide along the height direction of the frame 11. The support body 212 is also slidably connected to the frame body 211 along its length direction. When it is necessary to adjust the position of the support body 212 on the frame body 211, the driving assembly 6 on the frame body 211 starts to operate. The driving assembly 6 causes the support body 212 to slide smoothly along the length direction of the frame body 211. Such a design can achieve the position adjustment of the support body 212 in two directions, increasing the flexibility and adaptability of the device during use and being able to better meet different working requirements and operation scenarios.

[0036] To drive the support body 212 to slide horizontally, please refer to Figure 1 , in a preferred embodiment, the driving assembly 6 includes a runner 61 rotatably connected to the frame body 211. The end of the runner 61 is provided with a driving gear, and the support body 212 is provided with a driven rack 62 meshing with the driving gear.

[0037] In use, when it is necessary to drive the support body 212 to slide on the frame body 211, the runner 61 connected to the frame body 211 is driven by an external force to rotate. When the runner 61 rotates, the driving gear at its end rotates synchronously. Since the driving gear meshes with the driven rack on the support body 212, the rotational motion of the driving gear is converted into the linear motion of the driven rack. Driven by the driving gear, the driven rack moves along its length direction, so that the support body 212 fixedly connected thereto slides along the length direction of the frame body 211. By controlling the rotation direction and speed of the runner 61, the sliding direction and speed of the support body 212 on the frame body 211 can be accurately controlled.

[0038] To drive the support body 212 to lift or lower, please refer to Figure 1 , in a preferred embodiment, the lifting mechanism 3 includes a motor 51 provided at the top of the frame 11, and the output shaft of the motor 51 is coaxially connected to the end of the lead screw 31.

[0039] In use, when the motor 51 is started, the output shaft of the motor 51 starts to rotate. Since the output shaft of the motor 51 is coaxially connected to the end of the lead screw 31, the rotational motion of the output shaft of the motor 51 is directly transmitted to the lead screw 31. The lead screw 31 rotates around its own axis driven by the output shaft of the motor 51. Since the lead screw 31 cooperates with the threaded hole on the bracket 21, and the bracket 21 is slidably connected to the frame 11, when the lead screw 31 rotates, due to the effect of the thread, the bracket 21 will move up or down along the height direction of the frame 11, so as to realize the function of lifting or lowering. By controlling the forward and reverse rotation and speed of the motor 51, the lifting direction and speed of the bracket 21 can be accurately controlled.

[0040] To increase the torque of the output shaft of the motor 51, please refer to Figure 1 , in a preferred embodiment, the lifting mechanism 3 further includes a speed reducer 52 provided at the top of the frame 11, the output shaft of the motor 51 is coaxially connected to the input shaft of the speed reducer 52, and the output shaft of the speed reducer 52 is coaxially connected to the end of the lead screw 31.

[0041] In use, after the motor 51 is started, its output shaft starts to rotate, and the rotational power is transmitted to the input shaft of the speed reducer 52 coaxially connected thereto. The speed reducer 52 adjusts the input speed, usually reducing the speed and increasing the torque. After passing through the speed reduction and torque increase mechanism such as gear transmission inside the speed reducer 52, the output shaft of the speed reducer 52 rotates at a slower speed and with a larger torque. The output shaft of the speed reducer 52 is coaxially connected to the end of the lead screw 31, and transmits the adjusted speed and torque to the lead screw 31, so that the lead screw 31 rotates at a suitable speed and with sufficient force. Through the adjustment of the speed reducer 52, the operation of the lifting mechanism 3 can be made more stable and accurate, and can meet the requirements of different loads and working conditions.

[0042] In order to detect the rotational speeds at the top and bottom of the lead screw 31, please refer to Figure 2 , in a preferred embodiment, the detection mechanism 4 includes a processor, a display, and two rotational speed sensors 41 disposed on the frame 11. The rotational speed sensors 41 are Kejite KJTCS500 magnetoelectric rotational speed sensors. The two rotational speed sensors 41 are respectively located on one side of the top of the lead screw 31 and on one side of the bottom of the lead screw 31. The processor, the display, and the two rotational speed sensors 41 are electrically connected.

[0043] During use, the two rotational speed sensors 41 are respectively installed at positions on one side of the top of the lead screw 31 and on one side of the bottom of the lead screw 31. The Kejite magnetoelectric rotational speed sensor uses the principle of electromagnetic induction to measure speed. When the lead screw 31 rotates, the magnetic lines of force passing through the coil of the rotational speed sensor 41 change, generating a periodic voltage in the coil of the rotational speed sensor 41. The amplitude of the voltage is related to the rotational speed. The higher the rotational speed, the higher the output voltage (section 0 - a), and the output frequency is proportional to the rotational speed.

[0044] The output voltage is converted into an electrical signal, and these electrical signals are transmitted to the processor. The processor processes and analyzes the electrical signals from the two rotational speed sensors 41, calculates the accurate rotational speed value, and determines whether the rotational speeds at the top and bottom of the lead screw 31 are consistent and whether they are within the normal operating range. The processed rotational speed data and related analysis results are transmitted to the display for display. The operator can intuitively see the rotational speed information at the top and bottom of the lead screw 31 through the display, thereby understanding the working state of the lead screw 31. In this way, the real - time monitoring and display of the rotational speed of the lead screw 31 are achieved, which helps to promptly detect abnormal situations during the operation of the lead screw 31.

[0045] In order to improve the detection accuracy, please refer to Figure 2 , in a preferred embodiment, the rotational speed sensor 41 is a magnetoelectric sensor.

[0046] During use, the magnetoelectric sensor works based on the principle of electromagnetic induction. There is usually a permanent magnet and a coil inside the sensor. When the lead screw 31 rotates, the rotation of the lead screw 31 causes a periodic change in the magnetic field around it. This changing magnetic field passes through the coil inside the sensor. According to the law of electromagnetic induction, an induced electromotive force will be generated in the coil. The frequency of the induced electromotive force is proportional to the rotational speed of the lead screw 31. The sensor converts the induced electromotive force into an electrical signal output. By measuring the frequency of this electrical signal, the rotational speed of the lead screw 31 can be determined. The magnetoelectric sensor does not directly contact the lead screw 31 when measuring the rotational speed of the lead screw 31, will not generate friction and resistance to the rotation of the lead screw 31, reduces the interference to the movement of the lead screw 31, and at the same time reduces the wear of the sensor itself and improves the service life.

[0047] In order to further improve the detection accuracy, please refer toFigure 3 In a preferred embodiment, the rotational speed sensor 41 is connected to the frame 11 by bolts 42. The frame 11 is provided with through holes 43 for the bolts 42 to pass through, and the rotational speed sensor 41 is provided with second threaded holes 44 adapted to the bolts 42.

[0048] During use, the bolts 42 are passed through the through holes 43 in the frame 11 and screwed into the second threaded holes 44 on the rotational speed sensor 41. When the bolts 42 are gradually tightened, the threads of the bolts 42 engage with the threads of the second threaded holes 44. As the bolts 42 are continuously tightened, the bolts 42 generate a tensile force on the rotational speed sensor 41, pressing the rotational speed sensor 41 tightly against the frame 11. At the same time, due to the self-locking property of the threads, the bolts 42 can maintain this tightened state, thereby firmly connecting the rotational speed sensor 41 to the frame 11. Such a connection method ensures that the rotational speed sensor 41 is stable in position during operation and will not be easily displaced or loosened due to vibration or other external forces, ensuring that the rotational speed sensor 41 can accurately detect the rotational speed of the lead screw 31.

[0049] To reduce the possibility of the bolts 42 loosening, please refer to Figure 3 In a preferred embodiment, the frame 11 is provided with a clamping groove 45, and an anti-loosening tooth block 46 is clamped in the clamping groove 45. An anti-loosening gear 47 meshing with the anti-loosening tooth block 46 is sleeved on the bolt 42.

[0050] During use, after the bolts 42 are tightened to fix the rotational speed sensor 41 on the frame 11, the anti-loosening tooth block 46 is clamped in the clamping groove 45 of the frame 11. At this time, the anti-loosening gear 47 sleeved on the bolt 42 meshes with the anti-loosening tooth block 46. When the bolts 42 tend to loosen, the bolts 42 will have a slight tendency to rotate. Since the anti-loosening gear 47 meshes with the anti-loosening tooth block 46, the anti-loosening tooth block 46 will prevent the rotation of the anti-loosening gear 47, thereby restricting the rotation of the bolts 42 and preventing the bolts 42 from loosening. This structure utilizes the meshing resistance between the anti-loosening tooth block 46 and the anti-loosening gear 47, increasing the stability of the connection of the bolts 42, ensuring that during the long-term operation of the rotational speed sensor 41, the bolts 42 will not gradually loosen due to vibration or other factors, ensuring the firmness of the installation of the rotational speed sensor 41 and the accuracy of measurement.

[0051] To reduce the possibility of the rotational speed sensor 41 being interfered by an external magnetic field, please refer to Figure 3 In a preferred embodiment, an anti-interference shell 48 for shielding external electromagnetic interference is provided outside the rotational speed sensor 41.

[0052] In use, the anti-interference shell 48 is usually made of a material with good electromagnetic shielding performance, such as metal. When there is electromagnetic interference in the external environment, these electromagnetic waves will attempt to propagate to the rotational speed sensor 41. However, the anti-interference shell 48 forms a barrier. When the electromagnetic waves encounter the anti-interference shell 48, a part of them will be reflected back, and another part will generate eddy currents on the surface of the shell, thereby consuming the energy of the electromagnetic waves. Due to the reflection and absorption effects of the anti-interference shell 48 on the electromagnetic waves, it can significantly reduce the electromagnetic interference entering the interior of the shell, creating a relatively stable electromagnetic environment for the rotational speed sensor 41, enabling it to accurately detect the rotational speed of the lead screw 31 without being affected by the complex external electromagnetic environment.

[0053] To better understand the present utility model, the following will combine Figure 1 - Figure 3 to elaborate in detail on the working principle of the technical solution of a state detection device for the lead screw 31 of a car lifting machine according to the present utility model: The power assembly 5 drives the lead screw 31 to rotate on the machine frame 11. Since the lead screw 31 is adapted to the first threaded hole on the bracket 21, and the bracket 21 is slidably connected along the height direction of the machine frame 11, when the lead screw 31 rotates, due to the action of the thread, the bracket 21 will rise or fall along the height direction of the machine frame 11, thereby realizing the lifting action.

[0054] During this process, the detection mechanism 4 continuously detects the rotational speeds of the top and bottom of the lead screw 31. By monitoring the rotational speeds at these two positions, it can be determined whether the rotation of the lead screw 31 is stable, whether there are abnormal conditions such as jamming or non-synchronization. If the rotational speeds at the top and bottom are inconsistent or there are abnormal fluctuations, it indicates that there may be problems with the working state of the lead screw 31, and inspection and maintenance are required.

[0055] The specific embodiments of the present utility model described above do not constitute a limitation to the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included within the protection scope of the claims of the present utility model.

Claims

1. A state detection device for a screw rod of a car lifting machine, characterized in that, Comprising: A support mechanism, the support mechanism including a frame; A lifting mechanism, the lifting mechanism including a bracket slidably connected to the frame in the height direction of the frame; A lifting mechanism, the lifting mechanism including a lead screw rotatably connected to the frame, a first threaded hole adapted to the lead screw being provided on the bracket, the lead screw passing through the first threaded hole, and a power assembly for driving the rotation of the lead screw being provided on the frame; and, A detection mechanism, the detection mechanism being provided on the frame, the detection mechanism being used for detecting the rotational speed of the top of the lead screw and the rotational speed of the bottom of the lead screw.

2. The vehicle lifting machine lead screw state detection device according to claim 1, wherein, The bracket includes a frame body slidably connected to the frame and a support body slidably connected to the frame body in the length direction of the frame body, and a driving assembly for driving the sliding of the support body is provided on the frame body.

3. The car lifting machine lead screw state detection device according to claim 2, characterized in that, The driving assembly includes a runner rotatably connected to the frame body, a driving gear being provided at the end of the runner, and a driven rack meshing with the driving gear being provided on the support body.

4. The car lifting machine lead screw state detection device according to claim 1, characterized in that, The lifting mechanism includes a motor provided at the top of the frame, and the output shaft of the motor is coaxially connected to the end of the lead screw.

5. The car lifting machine lead screw state detection device according to claim 4, characterized in that, The lifting mechanism further includes a speed reducer provided at the top of the frame, the output shaft of the motor is coaxially connected to the input shaft of the speed reducer, and the output shaft of the speed reducer is coaxially connected to the end of the lead screw.

6. The vehicle lifting jack lead screw state detection device according to claim 1, characterized in that, The detection mechanism includes a processor, a display and two rotational speed sensors provided on the frame, the two rotational speed sensors being respectively located on one side of the top of the lead screw and one side of the bottom of the lead screw, and the processor, the display and the two rotational speed sensors are electrically connected.

7. The vehicle lifting jack screw state detection device according to claim 6, characterized in that The rotational speed sensor is a magnetoelectric sensor.

8. The vehicle lifting jack lead screw state detection device according to claim 6, characterized in that, The rotational speed sensor is connected to the frame by bolts, through holes for the bolts to pass through are provided on the frame, and a second threaded hole adapted to the bolts is provided on the rotational speed sensor.

9. The vehicle lifting jack lead screw state detection device according to claim 8, characterized in that, A clamping groove is provided on the frame, a loosening prevention tooth block is clamped in the clamping groove, and a loosening prevention gear meshing with the loosening prevention tooth block is sleeved on the bolt.

10. The vehicle lifting machine lead screw state detection device according to claim 6, characterized in that, An anti-interference shell for shielding external electromagnetic interference is provided outside the rotational speed sensor.

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