Lower position detection structure for lift mechanism

Abstract

The utility model relates to a kind of lower position detection structure for lifting mechanism, including lever, transmission assembly and detection component;Lever is rotatably installed in the bottom of the inside wall of cleaning tank, and lever one end is used to contact with lifting mechanism cooperation;Transmission assembly includes driving shaft and transmission shaft, driving shaft is vertically arranged along the height direction of cleaning tank, and driving shaft lower end is hinged with lever other end by connecting rod, and first tension spring is connected between driving shaft and the inner wall of cleaning tank;Transmission shaft is horizontally arranged along the direction perpendicular to the side wall of cleaning tank, and one end of transmission shaft rotatably penetrates the side wall of cleaning tank, and is hinged with the upper end of driving shaft in cleaning tank, and the other end of transmission shaft is connected with detection piece outside cleaning tank;Detection component includes two proximity switches, and two proximity switches are installed on the side wall of cleaning tank by mounting seat, and two proximity switches are arranged in upper and lower and all located on the swing path of detection piece for inducting and transmitting the position signal of detection piece.The utility model can detect the actual position of lifting mechanism, realize detection accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of testing mechanism technology, specifically to a lowering detection structure for a lifting mechanism. Background Technology

[0002] Currently, when manually immersing ultrasonically cleaning workpieces, especially larger ones, a lifting mechanism is needed to facilitate manual loading and unloading. In order to achieve operation in a negative pressure sealed space, the lifting mechanism, except for the drive unit, must be completely arranged inside the cleaning tank. Whether the lifting mechanism can be accurately detected to be in the correct position will affect the stable operation of the equipment.

[0003] Traditional detection methods are indirect, which involve adding a detection mechanism to the external drive mechanism to determine the positioning status. Since the drive mechanism and the lifting driven end are driven by multi-stage gears and chains, on the one hand, there are transmission efficiency errors that lead to inaccuracy; on the other hand, if a certain stage of transmission malfunctions (such as slippage), inaccurate detection will occur, causing the device to overshoot or undershoot the lower position, and the device will continue to perform the next action, ultimately leading to equipment damage. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a lower position detection structure for a lifting mechanism. It can use a linkage mechanism in conjunction with a detection component to accurately detect the position of the lifting mechanism, ensuring accurate and reliable detection with high stability.

[0005] This utility model is achieved through the following technical solution: A lower position detection structure for a lifting mechanism is provided, including a lever, a transmission assembly, and a detection assembly; The lever is rotatably mounted on the bottom of the inner wall of the cleaning tank, and one end of the lever is used to contact and cooperate with the lifting mechanism. The transmission assembly includes a drive shaft and a transmission shaft. The drive shaft is vertically arranged along the height direction of the cleaning tank. The lower end of the drive shaft is hinged to the other end of the lever via a connecting rod. A first tension spring is vertically arranged between the drive shaft and the inner wall of the cleaning tank. The transmission shaft is horizontally arranged along the direction perpendicular to the side wall of the cleaning tank. One end of the transmission shaft rotates through the side wall of the cleaning tank and is hinged to the upper end of the drive shaft inside the cleaning tank. The other end of the transmission shaft is connected to a detection plate that can rotate synchronously with the transmission shaft outside the cleaning tank. The detection assembly includes two proximity switches, which are mounted on the outer wall of the cleaning tank via mounting bases. The two proximity switches are positioned vertically and are both located on the swing path of the detection plate to sense and transmit the position signal of the detection plate.

[0006] Furthermore, a seated bearing is installed on one side of the lever at the bottom of the inner wall of the cleaning tank via a fixed seat. A rotating shaft is rotatably installed at the center of the seated bearing, with one end of the rotating shaft perpendicular to the center of the lever.

[0007] The lever can be stably installed at the bottom of the inner wall of the cleaning tank by cooperating with the rotating shaft in the bearing seat. The lever is in direct contact with the lifting mechanism, and the rotation helps to identify the lifting position of the lifting mechanism, so as to cooperate with the transmission component and the detection component to realize the position identification of the lifting mechanism.

[0008] Furthermore, a U-shaped closed frame is provided at the upper end of the drive shaft, and the U-shaped closed frame is sleeved and fixed to the end of the swing arm.

[0009] The upper end of the drive shaft can be fitted onto the rocker arm via a U-shaped closed frame, which is used to transmit the power of the drive shaft to the transmission shaft through the rocker arm.

[0010] Furthermore, a spacer for positioning and installing the swing arm is fitted onto the drive shaft located inside the cleaning tank.

[0011] A mounting sleeve is fitted onto the drive shaft, which can be used to position the rocker arm so that the rocker arm can be aligned and hinged with the upper end of the drive shaft, ensuring the stability of power transmission.

[0012] Furthermore, a fixed flange is installed on the outer wall of the cleaning tank corresponding to the drive shaft. The drive shaft passes through the fixed flange and is rotatably mounted in the center of the fixed flange through a bearing. An O-ring is installed between the outer ring of the bearing and the inner wall of the fixed flange.

[0013] The fixed flange is used to support and position the drive shaft, and to allow it to be rotatably mounted on the cleaning tank in conjunction with the bearing. An O-ring is installed between the outer ring of the bearing and the inner wall of the fixed flange to provide waterproofing and prevent the cleaning fluid inside the cleaning tank from overflowing to the outside.

[0014] Furthermore, a tension spring seat is connected to the fixed flange, and a positioning seat is sleeved on the drive shaft between the detection plate and the fixed flange. A second tension spring is connected between the tension spring seat and the positioning seat.

[0015] The second tension spring between the tension spring seat on the fixed flange and the positioning seat on the drive shaft can be used for buffering. When the lever at the bottom of the cleaning tank is reset, the drive shaft moves too fast under its own weight and the tension of the first tension spring, which may cause it to overshoot the detection position. The second tension spring is added to buffer the return action of the drive shaft.

[0016] Preferably, guide sleeves are installed on the inner sidewalls of the cleaning tank, and the guide sleeves are fitted onto the drive shaft and slide in cooperation with the drive shaft.

[0017] By installing a guide sleeve on the inner wall of the cleaning tank, the drive shaft passes vertically through the guide sleeve, and the guide sleeve slides with the drive shaft. The guide sleeve can guide and limit the up and down movement of the drive shaft, thereby improving the stability of the drive shaft movement.

[0018] Furthermore, the mounting base has an arc-shaped mounting groove, the center of which is aligned with the rotation center of the detection plate. The proximity switch is installed in the mounting groove by a locking nut.

[0019] The arc-shaped mounting slot is used to install proximity switches. The positions of the two proximity switches can be adjusted according to actual convenience, allowing for flexible adjustment of the proximity switch positions.

[0020] The beneficial effects of this utility model are: This invention uses a lever in conjunction with a lifting mechanism. When the lifting mechanism descends, it applies force to the lever, causing one end of the lever to rotate and descend, while the other end rotates and rises. Power can be transmitted to a transmission shaft via a drive shaft, which in turn drives the detection plate to rotate. This can then be used in conjunction with a proximity switch to transmit the position information of the lifting mechanism, enabling efficient and accurate detection of the lifting mechanism's position. The detection is accurate and reliable.

[0021] The detection component of this invention is installed on the upper part of the cleaning tank, above the liquid surface, which greatly reduces the overflow of liquid in the cleaning tank and ensures that the cleaning effect of the cleaning solution is not affected. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0024] Figure 3 for Figure 2 Side view.

[0025] Figure 4 for Figure 1 Enlarged diagram of point B in the middle.

[0026] Figure 5 This is a schematic diagram showing the installation between the detection component and the transmission component in this utility model.

[0027] Figure 6 This is a schematic diagram of the installation of this utility model on the inner wall of the cleaning tank.

[0028] Figure 7 for Figure 6 Side view sectional view.

[0029] Figure 8 This is a schematic diagram of the installation of this utility model outside the cleaning tank.

[0030] Figure 9 for Figure 8 Enlarged diagram of point C in the middle.

[0031] As shown in the figure: 1. Cleaning tank; 2. Toggle lever; 3. Drive shaft; 4. Guide sleeve; 5. First tension spring; 6. Drive shaft; 7. Fixed flange; 8. Second tension spring; 9. Tension spring seat; 10. Detection plate; 11. Mounting seat; 12. Proximity switch; 13. Swing arm; 14. Bearing with seat; 15. Connecting rod; 16. Mounting groove; 17. U-shaped closed frame; 18. Positioning seat; 19. O-ring seal; 20. Bearing; 21. Spacer; 22. Rotating shaft; 23. Fixed seat. Detailed Implementation

[0032] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0033] A lowering detection structure for a lifting mechanism includes a lever 2, a transmission assembly, and a detection assembly. The lever 2 is rotatably mounted on the bottom of the inner wall of the cleaning tank 1, and one end of the lever 2 is used to contact and cooperate with the lifting mechanism. Specifically, a seated bearing 14 is mounted on one side of the lever 2 via a fixed seat 23 on the bottom of the inner wall of the cleaning tank 1. A rotating shaft 22 is rotatably mounted at the center of the seated bearing 14, and one end of the rotating shaft 22 is perpendicular to the center of the lever 2.

[0034] The transmission assembly includes a drive shaft 3 and a transmission shaft 6. The drive shaft 3 is vertically arranged along the height direction of the cleaning tank 1. Guide sleeves 4 are installed on the inner sidewall of the cleaning tank 1, and the guide sleeves 4 are fitted onto the drive shaft 3 and slide in cooperation with the drive shaft 3. The lower end of the drive shaft 3 is hinged to the other end of the lever 2 through a connecting rod 15. A first tension spring 5 is vertically arranged between the drive shaft 3 and the inner wall of the cleaning tank 1. The transmission shaft 6 is horizontally arranged along the direction perpendicular to the sidewall of the cleaning tank 1. One end of the transmission shaft 6 rotatably passes through the sidewall of the cleaning tank 1 and is hinged to the upper end of the drive shaft 3 inside the cleaning tank 1. A U-shaped closed frame 17 is provided at the upper end of the drive shaft 3, and the drive shaft 6 is sleeved and fixed to the end of the swing rod 13 through the U-shaped closed frame 17. The other end of the transmission shaft 6 is connected to a detection plate 10 that can rotate synchronously with the transmission shaft 6 outside the cleaning tank 1. A spacer 21 for positioning and installing the swing rod 13 is sleeved on the transmission shaft 6 located inside the cleaning tank 1.

[0035] A fixed flange 7 is installed on the outer wall of the cleaning tank 1 corresponding to the drive shaft 6. The drive shaft 6 passes through the fixed flange 7 and is rotatably mounted at the center of the fixed flange 7 via a bearing 20. In this embodiment, the bearing 20 is a deep groove ball bearing, and two bearings are provided. An O-ring seal 19 is installed between the outer ring of the bearing 20 and the inner wall of the fixed flange 7. A tension spring seat 9 is connected to the fixed flange 7. A positioning seat 18 is sleeved and connected to the drive shaft 6 between the detection plate 10 and the fixed flange 7. A second tension spring 8 is connected between the tension spring seat 9 and the positioning seat 18.

[0036] The detection assembly includes two proximity switches 12, which are mounted on the outer wall of the cleaning tank 1 via mounting bases 11. The two proximity switches 12 are positioned vertically and are both located on the swing path of the detection piece 10 to sense and transmit the position signal of the detection piece 10. An arc-shaped mounting groove 16 is provided on the mounting base 11, with the center of the groove 16 coinciding with the rotation center of the detection piece 10. The proximity switches 12 are mounted within the mounting groove 16 using locking nuts. In this embodiment, the proximity switches 12 can be electrically connected to the drive motor of the lifting mechanism via a PLC. By transmitting signals through the proximity switches 12, the PLC interprets the signals to control the start and stop of the drive motor, thereby controlling the lifting position of the lifting mechanism and achieving automated position detection.

[0037] The working process of this utility model is as follows: When the lifting mechanism descends to the lower working position in the cleaning tank 1, the lifting mechanism will touch and press down one end of the lever 2, and the other end of the lever 2 will rise. Through the connecting rod 15, the drive shaft 3 will move upward under the limiting action of the guide sleeve 4. The swing rod 13 hinged to the upper end of the drive shaft 3 will rotate and synchronously drive the transmission shaft 6 to rotate. The rotation of the transmission shaft 6 will drive the detection plate 10 at the other end to rotate counterclockwise. When the detection plate 10 moves to the point where it is detected by the proximity switch 12 at the bottom, it will trigger the PLC to control the drive motor to stop. At this time, the lifting mechanism stops descending and the lifting mechanism has descended to the position.

[0038] After the cleaning work is completed, the lifting mechanism rises and separates from one end of the lever 2. At this time, the drive shaft 3 begins to descend under the tension of the first tension spring 5 and its own gravity. To prevent the speed from being too fast and causing the detection plate 10 to cross the detection position, the second tension spring 8 is used to buffer the descent speed of the drive shaft 3. The descent of the drive shaft 3 drives the swing arm 13 and the transmission shaft 6 to move in the opposite direction. The detection plate 10 at the end of the transmission shaft 6 rotates clockwise to the upper position of the upper proximity switch 12, triggering the PLC to control the drive motor to stop. At this time, the lifting mechanism has returned to its initial position.

[0039] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A lowering position detection structure for a lifting mechanism, characterized in that: Includes lever, transmission assembly, and detection assembly; The lever is rotatably mounted on the bottom of the inner wall of the cleaning tank, and one end of the lever is used to contact and cooperate with the lifting mechanism. The transmission assembly includes a drive shaft and a transmission shaft. The drive shaft is vertically arranged along the height direction of the cleaning tank. The lower end of the drive shaft is hinged to the other end of the lever via a connecting rod. A first tension spring is vertically arranged between the drive shaft and the inner wall of the cleaning tank. The transmission shaft is horizontally arranged along the direction perpendicular to the side wall of the cleaning tank. One end of the transmission shaft rotates through the side wall of the cleaning tank and is hinged to the upper end of the drive shaft inside the cleaning tank. The other end of the transmission shaft is connected to a detection plate that can rotate synchronously with the transmission shaft outside the cleaning tank. The detection assembly includes two proximity switches, which are mounted on the outer wall of the cleaning tank via mounting bases. The two proximity switches are positioned vertically and are both located on the swing path of the detection plate to sense and transmit the position signal of the detection plate.

2. The lowering detection structure for the lifting mechanism according to claim 1, characterized in that: A seated bearing is installed on one side of the lever at the bottom of the inner wall of the cleaning tank via a fixed seat. A rotating shaft is rotatably installed at the center of the seated bearing, with one end of the rotating shaft perpendicular to the center of the lever.

3. The lowering detection structure for the lifting mechanism according to claim 1, characterized in that: The upper end of the drive shaft is provided with a U-shaped closed frame, which is then sleeved and fixed to the end of the swing arm.

4. The lowering detection structure for the lifting mechanism according to claim 3, characterized in that: A spacer for positioning and installing the swing arm is fitted onto the drive shaft located inside the cleaning tank.

5. The lowering detection structure for the lifting mechanism according to claim 1, characterized in that: A fixed flange is installed on the outer wall of the cleaning tank corresponding to the drive shaft. The drive shaft passes through the fixed flange and is rotated in the center of the fixed flange through a bearing. An O-ring is installed between the outer ring of the bearing and the inner wall of the fixed flange.

6. The lowering detection structure for the lifting mechanism according to claim 5, characterized in that: A tension spring seat is connected to the fixed flange, and a positioning seat is sleeved on the drive shaft between the detection plate and the fixed flange. A second tension spring is connected between the tension spring seat and the positioning seat.

7. The lowering detection structure for the lifting mechanism according to claim 1, characterized in that: Guide sleeves are installed on the inner sidewalls of the cleaning tank, and the guide sleeves are fitted onto the drive shaft and slide in cooperation with the drive shaft.

8. The lowering detection structure for the lifting mechanism according to claim 1, characterized in that: The mounting base has an arc-shaped mounting groove, the center of which is aligned with the rotation center of the detection plate. The proximity switch is installed in the mounting groove by a locking nut.

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