Downward-in-place detection structure and detection method for lifting mechanism

Abstract

The invention relates to a lower in-place detection structure for a lifting mechanism and a detection method. The lower in-place detection structure comprises a deflector rod, a transmission assembly and a detection assembly. The deflector rod is rotatably mounted at the bottom of the inner side wall of the cleaning tank; one end of the deflector rod is in contact fit with the lifting mechanism; the transmission assembly comprises a driving shaft and a transmission shaft, the driving shaft is vertically arranged in the height direction of the cleaning tank, the lower end of the driving shaft is hinged to the other end of the deflector rod through a connecting rod, and a first tension spring is connected between the driving shaft and the inner wall of the cleaning tank; one end of the transmission shaft rotationally penetrates through the side wall of the cleaning tank and is hinged to the upper end of a driving shaft in the cleaning tank, and the other end of the transmission shaft is connected with a detection piece outside the cleaning tank; the detection assembly comprises two proximity switches, the two proximity switches are installed on the outer side wall of the cleaning tank through an installation base, and the two proximity switches are arranged up and down, located on the swing path of the detection piece and used for sensing and transmitting position signals of the detection piece. The actual position of the lifting mechanism can be detected, and detection is accurate and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection mechanism, in particular to a down-to-position detection structure for lifting mechanism and a detection method. BACKGROUND

[0002] At present, when manually soaking and ultrasonically cleaning workpieces, especially larger workpieces, a lifting mechanism needs to be added to facilitate manual loading and unloading. In order to realize work in a negative pressure closed space, the lifting mechanism needs to be completely arranged inside the cleaning tank except the driving part. Whether the accurate detection of the down-to-position of the lifting mechanism can be realized will affect whether the equipment can stably operate.

[0003] The traditional detection method is indirect detection, that is, a detection mechanism is added to the external driving mechanism to judge the down-to-position. Since the driving mechanism and the lifting driven end are transmitted through multiple gear stages and chains, on the one hand, transmission efficiency error exists, which leads to inaccuracy, and on the other hand, if a certain stage of transmission fails (such as slipping), the detection will be inaccurate, which leads to overshooting the down-to-position or not reaching the down-to-position, and the equipment continues to perform the next action, which eventually leads to equipment damage. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a down-to-position detection structure for lifting mechanism and a detection method, which can realize accurate detection of the position of the lifting mechanism by using a connecting rod mechanism in cooperation with a detection assembly, and is accurate, reliable and high in stability.

[0005] The present application is realized by the following technical solutions: A down-to-position detection structure for lifting mechanism is provided, which comprises a lever, a transmission assembly and a detection assembly. The lever is rotatably installed at the bottom of the inner side wall of the cleaning tank, and one end of the lever is used for contact and cooperation with the lifting mechanism. The transmission assembly comprises a driving shaft and a transmission shaft. The driving shaft is vertically arranged along the height direction of the cleaning tank. The lower end of the driving shaft is hingedly connected to the other end of the lever through a connecting rod. A first tension spring is arranged vertically between the driving 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 penetrates through the side wall of the cleaning tank and is hingedly connected to the upper end of the driving shaft in the cleaning tank. The other end of the transmission shaft is connected to a detection sheet outside the cleaning tank, which can rotate synchronously with the transmission shaft. The detection assembly comprises two proximity switches. The two proximity switches are installed on the outer side wall of the cleaning tank through a mounting seat. The two proximity switches are arranged vertically and are located on the swing path of the detection sheet for sensing and transmitting the position signal of the detection sheet.

[0006] Further, a bearing with seat is installed on one side of the bottom of the inner side wall of the cleaning tank through a fixing seat. A rotating shaft is rotatably installed at the center of the bearing with seat. One end of the rotating shaft is vertically arranged at the center of the lever.

[0007] The dialing rod is stably installed at the bottom of the inner side wall of the cleaning tank by cooperating with the rotating shaft in the bearing with a seat, the dialing rod directly contacts with the lifting mechanism, and the lifting position of the lifting mechanism is assisted to be recognized by rotating, so that the position recognition of the lifting mechanism is realized by cooperating with the transmission assembly and the detection assembly.

[0008] Further, the upper end of the driving shaft is provided with a U-shaped closed frame, and the end of the swing rod is sleeved and fixed through the U-shaped closed frame.

[0009] The upper end of the driving shaft can be sleeved on the swing rod through the U-shaped closed frame, for transmitting the power of the driving shaft to the transmission shaft through the swing rod.

[0010] Further, a spacer sleeve for positioning and installing the swing rod is sleeved on the transmission shaft in the cleaning tank.

[0011] The spacer sleeve is sleeved and installed on the transmission shaft, the position of the swing rod is positioned by the spacer sleeve, the swing rod can be hingedly connected with the upper end of the driving shaft, and the stability of power transmission is ensured.

[0012] Further, a fixed flange corresponding to the transmission shaft is installed on the outer side wall of the cleaning tank, the transmission shaft penetrates through the fixed flange and is rotatably installed at the center of the fixed flange, and an O-shaped sealing ring is installed between the outer ring of the bearing and the inner wall of the fixed flange.

[0013] The fixed flange is used for supporting and positioning the transmission shaft, and the transmission shaft can be rotatably installed on the cleaning tank in cooperation with the bearing, the O-shaped sealing ring between the outer ring of the bearing and the inner wall of the fixed flange can play a waterproof role, and the overflow of the cleaning liquid in the cleaning tank to the outside is prevented.

[0014] Further, a tension spring seat is connected to the fixed flange, a positioning seat is sleeved and connected on the transmission shaft between the detection sheet and the fixed flange, and 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 transmission shaft can be used for buffering, when the dialing rod at the bottom of the cleaning tank is reset, the driving shaft moves relatively fast under the gravity of the driving shaft and the tension of the first tension spring, which may cause the driving shaft to pass the detection position, and the second tension spring is added for buffering the homing action of the driving shaft.

[0016] As preferred, guide sleeves are installed on the inner side wall of the cleaning tank, the guide sleeves are sleeved on the driving shaft and are in sliding cooperation with the driving shaft.

[0017] By installing the guide sleeves on the inner side wall of the cleaning tank, the driving shaft vertically penetrates through the guide sleeves, the guide sleeves and the driving shaft are in sliding cooperation, the driving shaft is guided and limited in upward and downward movement by the guide sleeves, and the stability of the movement of the driving shaft is improved.

[0018] Further, the mounting seat is provided with an arc-shaped mounting groove, the center of the mounting groove is consistent with the rotating center of the detection sheet, and the proximity switch is mounted in the mounting groove through a locking nut.

[0019] The arc-shaped mounting groove is used for mounting the proximity switch, the positions of the two proximity switches can be adjusted according to actual conditions, and flexible adjustment of the positions of the proximity switches is realized.

[0020] A detection method using a lower position detection structure of a lifting mechanism, when the lifting mechanism is lowered, the push rod is rotated, the other end of the push rod drives the driving shaft to act upward through the connecting rod, the upper end of the driving shaft drives the swing rod to rotate the transmission shaft, when the detection sheet at the other end of the transmission shaft swings counterclockwise and passes through the lower proximity switch, the signal of the lower proximity switch is triggered, which can be transmitted to the PLC, the PLC controls the driving motor of the lifting mechanism to stop, and the lifting mechanism is lowered to the position; when the lifting mechanism is raised, the push rod is reset through the first tension spring, the other end of the push rod drives the driving shaft to act downward through the connecting rod, the upper end of the driving shaft drives the swing rod to reset the transmission shaft, and when the detection sheet at the other end of the transmission shaft swings clockwise and swings upward from the lower proximity switch to the upper proximity switch, the signal of the upper proximity switch is triggered, which can be transmitted to the PLC, the PLC controls the driving motor of the lifting mechanism to stop, and the lifting mechanism is reset.

[0021] The beneficial effects of the present application are: The present application cooperates the push rod with the lifting mechanism, the push rod is forced to rotate and descend at one end and rotate and ascend at the other end when the lifting mechanism is lowered, the driving shaft can transmit power to the transmission shaft, the transmission shaft rotates to drive the detection sheet to rotate, and then the proximity switch can be cooperated to transmit the position information of the lifting mechanism, the position of the lifting mechanism can be efficiently and accurately detected, and the detection is accurate and reliable.

[0022] The detection assembly of the present application is installed on the upper part of the cleaning tank and is higher than the liquid level, which greatly reduces the overflow of the liquid in the cleaning tank and ensures that the cleaning effect of the cleaning liquid is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0024] Figure 2 It is Figure 1 An enlarged schematic diagram of position A in FIG.

[0025] Figure 3 It is Figure 2 A side view.

[0026] Figure 4 It is Figure 1 An enlarged schematic diagram of position B in FIG.

[0027] Figure 5 It is an installation schematic diagram between the detection assembly and the transmission assembly in the present application.

[0028] Figure 6 The installation schematic diagram of the application in the inner wall of the cleaning tank.

[0029] Figure 7 The installation schematic diagram of the application in the inner wall of the cleaning tank. Figure 6 The installation schematic diagram of the application in the inner wall of the cleaning tank.

[0030] Figure 8 The installation schematic diagram of the application in the inner wall of the cleaning tank.

[0031] Figure 9 The installation schematic diagram of the application in the inner wall of the cleaning tank. Figure 8 The installation schematic diagram of the application in the inner wall of the cleaning tank.

[0032] The installation schematic diagram of the application in the inner wall of the cleaning tank. 1, cleaning tank, 2, the lever, 3, drive shaft, 4, guide sleeve, 5, the first tension spring, 6, transmission shaft, 7, fixed flange, 8, the second tension spring, 9, tension spring seat, 10, detection sheet, 11, mounting seat, 12, proximity switch, 13, swing lever, 14, bearing with seat, 15, connecting rod, 16, installation groove, 17, U-shaped closed frame, 18, positioning seat, 19, O-shaped sealing ring, 20, bearing, 21, spacer sleeve, 22, rotating shaft, 23, fixed seat. DETAILED DESCRIPTION

[0033] In order to clearly illustrate the technical features of the present application, the present application will be described below through specific embodiments.

[0034] A down-to-position detection structure for a lifting mechanism, comprising a lever 2, a transmission assembly and a detection assembly, the lever 2 is rotatably installed at the bottom of the inner side wall of the cleaning tank 1, one end of the lever 2 is used for contact and cooperation with the lifting mechanism; specifically, the bottom of the inner side wall of the cleaning tank 1 is provided with a bearing with seat 14 on one side of the lever 2 through a fixed seat 23, a rotating shaft 22 is rotatably installed at the center of the bearing with seat 14, and one end of the rotating shaft 22 is perpendicular to the center of the lever 2.

[0035] The transmission assembly comprises 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, a guide sleeve 4 is installed on the inner side wall of the cleaning tank 1, the guide sleeve 4 is sleeved on the drive shaft 3 and is in sliding cooperation with the drive shaft 3. The lower end of the drive shaft 3 is hingedly connected to the other end of the lever 2 through a connecting rod 15, and a first tension spring 5 is connected between the drive shaft 3 and the inner wall of the cleaning tank 1 and is vertically arranged; the transmission shaft 6 is transversely arranged along the direction perpendicular to the side wall of the cleaning tank 1, one end of the transmission shaft 6 penetrates through the side wall of the cleaning tank 1 and is hingedly connected to the upper end of the drive shaft 3 in the cleaning tank 1, and the upper end of the drive shaft 3 is provided with a U-shaped closed frame 17 and is fixedly sleeved with the end of a swing lever 13 through the U-shaped closed frame 17. The other end of the transmission shaft 6 is connected with a detection sheet 10 which can rotate synchronously with the transmission shaft 6 outside the cleaning tank 1, and a spacer sleeve 21 for positioning and installing the swing lever 13 is sleeved on the transmission shaft 6 in the cleaning tank 1.

[0036] The fixed flange 7 is arranged on the outer side wall of the cleaning tank 1 corresponding to the transmission shaft 6, the transmission shaft 6 penetrates the fixed flange 7 and is rotatably arranged at the center of the fixed flange 7 through bearings 20, in the embodiment, the bearings 20 are deep groove ball bearings, two bearings 20 are arranged, and an O-shaped sealing ring 19 is arranged between the outer ring of the bearing 20 and the inner wall of the fixed flange 7. The fixed flange 7 is connected with a tension spring seat 9, a positioning seat 18 is arranged on the transmission shaft 6 between the detection sheet 10 and the fixed flange 7, and the second tension spring 8 is connected between the tension spring seat 9 and the positioning seat 18.

[0037] The detection assembly comprises two proximity switches 12, the two proximity switches 12 are arranged on the outer side wall of the cleaning tank 1 through mounting seats 11, the two proximity switches 12 are arranged above and below and are located on the swing path of the detection sheet 10 for sensing and transmitting the position signal of the detection sheet 10. An arc-shaped mounting groove 16 is arranged on the mounting seat 11, the center of the mounting groove 16 is consistent with the rotation center of the detection sheet 10, and the proximity switch 12 is arranged in the mounting groove 16 through a locking nut. In the embodiment, the proximity switch 12 can be electrically connected with the driving motor of the lifting mechanism through PLC, the signal is transmitted through the proximity switch 12, the PLC judges the signal to control the start and stop of the driving motor, and then the lifting position of the lifting mechanism is controlled, and the automatic position detection is realized.

[0038] The working process of the application is as follows: when the lifting mechanism is lowered to the lower working position in the cleaning tank 1, the lifting mechanism will touch and press one end of the lever 2, the other end of the lever 2 will be lifted, the driving shaft 3 will be driven by the connecting rod 15 to move upwards under the limiting action of the guide sleeve 4, the swing lever 13 hinged to the upper end of the driving shaft 3 will rotate, and the transmission shaft 6 will rotate synchronously, the transmission shaft 6 rotates to drive the detection sheet 10 at the other end to rotate counterclockwise, when the detection sheet 10 moves to be detected by the lower proximity switch 12, the PLC control driving motor is triggered to stop, at this time, the lifting mechanism stops the lowering action, and at this time, the lifting mechanism is lowered to the position.

[0039] When the cleaning work is completed, the lifting mechanism rises and separates from one end of the lever 2, at this time, the driving shaft 3 starts to descend under the action of the first tension spring 5 and its own gravity, in order to prevent the speed from being too fast and causing the detection sheet 10 to pass the detection position, the second tension spring 8 is used to buffer the descending speed of the driving shaft 3, the driving shaft 3 drives the swing lever 13 and the transmission shaft 6 to reverse, and the detection sheet 10 at the end of the transmission shaft 6 rotates clockwise to the upper position of the upper proximity switch 12, the PLC control driving motor is triggered to stop, at this time, the lifting mechanism has returned to the initial position.

[0040] Of course, the above description is not limited to the above examples, and the technical features not described in the application can be implemented by or using the prior art, which will not be described here; the above examples and drawings are only used to illustrate the technical solutions of the application and are not a limitation on the application, and the application has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the application do not deviate from the purpose of the application, and should also belong to the protection scope of the claims of the application.

Claims

1. A lowering position detection structure for a lifting mechanism, characterized in that: The device comprises a poking rod, a transmission assembly and a detection assembly. The poking rod is rotatably installed at the bottom of the inner side wall of the cleaning tank, and one end of the poking rod is used for contacting and cooperating with the lifting mechanism. The transmission assembly comprises a driving shaft and a transmission shaft. The driving shaft is vertically arranged along the height direction of the cleaning tank.

2. The lower limit position detecting structure for a lifting mechanism according to claim 1, characterized in that: The lower end of the driving shaft is hingedly connected to the other end of the poking rod through a connecting rod.

3. The lower end position detecting structure for a lifting mechanism according to claim 1, characterized in that: A first tension spring is vertically arranged between the driving shaft and the inner wall of the cleaning tank.

4. The lower end position detecting structure for a lifting mechanism according to claim 3, characterized in that: The transmission shaft is horizontally arranged along the direction perpendicular to the side wall of the cleaning tank.

5. The lower end position detecting structure for a lifting mechanism according to claim 1, characterized in that: One end of the transmission shaft is rotatably penetrated through the side wall of the cleaning tank and is hingedly connected to the upper end of the driving shaft in the cleaning tank.

6. The lower limit position detecting structure for a lifting mechanism according to claim 5, characterized in that: The other end of the transmission shaft is connected to a detection sheet which can synchronously rotate with the transmission shaft outside the cleaning tank.

7. The lower end position detecting structure for a lifting mechanism according to claim 1, characterized in that: The detection assembly comprises two proximity switches which are installed on the outer side wall of the cleaning tank through a mounting seat.

8. The lower end position detecting structure for a lifting mechanism according to claim 1, characterized by: The two proximity switches are arranged in an up-down manner and are located on the swing path of the detection sheet for sensing and transmitting the position signal of the detection sheet.

9. A detection method using the lower position detection structure of the lifting mechanism according to any one of claims 1 to 8, characterized by: A bearing with seat is installed on the bottom of the inner side wall of the cleaning tank on one side of the poking rod. A rotating shaft is rotatably installed at the center of the bearing with seat. One end of the rotating shaft is vertically arranged at the center of the poking rod. The upper end of the driving shaft is provided with a U-shaped closed frame which is fixedly sleeved with the end of the swing rod. A spacer sleeve is sleeved on the transmission shaft in the cleaning tank for positioning and installing the swing rod. A fixed flange is installed on the outer side wall of the cleaning tank corresponding to the transmission shaft. The transmission shaft is rotatably penetrated through the center of the fixed flange. An O-shaped sealing ring is installed between the outer ring of the bearing and the inner wall of the fixed flange. A tension spring seat is connected to the fixed flange. A positioning seat is connected to the transmission shaft between the detection sheet and the fixed flange. A guide sleeve is installed on the inner side wall of the cleaning tank in an up-down manner. The guide sleeve is sleeved on the driving shaft and is in sliding cooperation with the driving shaft. An arc-shaped mounting groove is formed in the mounting seat. The center of the mounting groove is consistent with the rotating center of the detection sheet. The proximity switches are installed in the mounting groove through locking nuts. When the lifting mechanism is lowered, the poking rod is pressed to rotate. The other end of the poking rod drives the driving shaft to move upward through the connecting rod. The upper end of the driving shaft drives the swing rod to drive the transmission shaft to rotate. When the detection sheet at the other end of the transmission shaft swings counterclockwise and passes through the lower proximity switch, the signal of the lower proximity switch is triggered and can be transmitted to the PLC. The PLC controls the driving motor of the lifting mechanism to stop, and the lifting mechanism is lowered to the position. When the lifting mechanism is raised, the poking rod is reset through the first tension spring. The other end of the poking rod drives the driving shaft to move downward through the connecting rod. The upper end of the driving shaft drives the swing rod to drive the transmission shaft to reset. When the detection sheet at the other end of the transmission shaft swings clockwise and swings from the lower proximity switch to the upper proximity switch, the signal of the upper proximity switch is triggered and can be transmitted to the PLC. The PLC controls the driving motor of the lifting mechanism to stop, and the lifting mechanism is reset.

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