A universal modular lifting limit mechanism

Abstract

The present invention discloses a universal modular lifting limit mechanism, comprising a pair of inductive proximity sensors and inductive sheets; the lifting limit mechanism comprises a sensor mounting base with an accommodating cavity therein; each inductive proximity sensor is fixedly mounted on a sensor bracket, and a pair of sensor brackets are fixedly mounted in the accommodating cavity of the sensor mounting base; an oil-free bushing is fixedly mounted on the sensor mounting base, the oil-free bushing is slidably sleeved on a guide shaft, one end of the guide shaft is fixedly mounted with an inductive sheet, and the other end of the guide shaft is fixedly mounted with a spring preload sheet; the spring is sleeved on the guide shaft; the limiting mechanism provided by the present invention only needs to select a suitable position on the limiting mechanism for installation, and only needs to perform a calibration operation on the entire limiting mechanism once; by installing the sensor bracket inside the accommodating cavity of the sensor mounting base, the interference of the external environment on the pair of inductive proximity sensors can be reduced.

Description

Technical Field

[0001] The invention relates to automated transportation technology, in particular to a universal modular lifting limit mechanism. Background Art

[0002] Lifting mechanisms are widely used in the fields of autonomous railcar technology, industrial technology, and storage technology. Lifting mechanisms are installed on any structure that requires lifting limit detection to achieve the function of lifting objects. The upper limit sensor and lower limit sensor of the existing lifting mechanism correspond to the required lifting stroke and need to be installed one above and one below the free space of the lifting equipment. And it is necessary to install a follow-up trigger sensor part on the lifting plate.

[0003] Therefore, the existing lifting limit mechanism has the following technical problems during use: first, it is not easy to find a pair of suitable installation positions on the equipment; second, after the upper limit sensor, the lower limit sensor and the induction plate are installed, the upper limit sensor, the lower limit sensor and the induction plate need to be position-calibrated, so the existing technology has many installation steps and takes a lot of time. In addition, in the existing technology, the upper limit sensor and the lower limit sensor are exposed to the outside, and the sensor signal is easily interfered. Summary of the invention

[0004] The object of the present invention is to provide a universal modular lift limit mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a universal modular lifting limit mechanism, comprising a pair of inductive proximity sensors and an inductive sheet used in conjunction with the inductive proximity sensors; the lifting limit mechanism comprises a sensor mounting base with an accommodating cavity therein; each of the inductive proximity sensors is fixedly mounted on a sensor bracket, and a pair of the sensor brackets are fixedly mounted in the accommodating cavity of the sensor mounting base; one of the inductive proximity sensors and the sensor bracket for fixing the inductive proximity sensor constitute an upper limit sensor module; another of the inductive proximity sensors and the sensor bracket for fixing the inductive proximity sensor constitute a lower limit sensor module; an oil-free bushing is fixedly mounted on the sensor mounting base, the oil-free bushing is slidably sleeved on the guide shaft, one end of the guide shaft is fixedly mounted with an inductive sheet, and the other end of the guide shaft is fixedly mounted with a spring preload sheet; during the sliding process of the guide shaft along the oil-free bushing, one end of the guide shaft on which the inductive sheet is fixedly mounted passes through a pair of inductive proximity sensors in sequence; the spring is sleeved on the guide shaft, one end of the spring abuts against the oil-free bushing, and the other end of the spring abuts against the spring preload sheet.

[0006] As a preferred technical solution of the present invention, the sensor bracket is fixedly installed in the accommodating cavity of the sensor mounting base in a detachable manner. By limiting the sensor bracket and the sensor mounting base to be connected in a detachable fixed manner, the distance between the upper limit sensor module and the lower limit sensor module can be adjusted to meet the needs of different measurement scenarios, thereby expanding the types of applicable scenarios of the lifting device.

[0007] As a preferred technical solution of the present invention, the sensor mounting base is provided with a waist hole for facilitating the adjustment of the distance between the upper limit sensor module and the lower limit sensor module, and the sensor bracket is fixedly installed in the accommodating cavity of the sensor mounting base by bolts passing through the waist hole. The sensor mounting base is provided with a waist hole, and the sensor bracket is fixedly installed in the accommodating cavity of the sensor mounting base by bolts passing through the waist hole; by providing the waist hole, the operator can easily adjust the distance between the upper limit sensor module and the lower limit sensor module directly on the outer side of the mounting base, making the adjustment operation more convenient.

[0008] As a preferred technical solution of the present invention, the waist holes are a pair, and the pair of waist holes are located on the same side of the sensor mounting base. By defining a pair of waist holes, the sensor bracket is fixedly connected to the sensor mounting base by two bolts; the sensor bracket is more stable.

[0009] As a preferred technical solution of the present invention, a mounting plate is fixedly connected to the sensor mounting base, a mounting hole is opened on the mounting plate, and a pair of waist holes are located on the same side of the sensor mounting base.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention provides a universal modular lifting limit mechanism. During installation, it is only necessary to select a suitable position on the limit mechanism for installation. After installation, it is only necessary to perform a calibration operation on the entire limit mechanism once, and there is no need to calibrate these devices in batches, thereby saving operation steps and operation time, and it is easier to find a suitable position. By installing the sensor bracket inside the accommodating cavity of the sensor mounting base, the interference of the external environment on a pair of inductive proximity sensors can be reduced, thereby improving the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a general modular lifting limit mechanism structure schematic diagram;

[0013] Attached Figure 2 The present invention is a schematic diagram of the internal structure of a universal modular lift limit mechanism.

[0014] In the figure: 1. Inductive proximity sensor; 2. Inductive sheet; 3. Accommodating cavity; 4. Sensor mounting base; 5. Sensor bracket; 6. Oil-free bushing; 7. Guide shaft; 8. Spring preload sheet; 9. Spring; 10. Waist hole; 11. Mounting plate; 12. Mounting hole. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work results should fall within the scope of protection of this application.

[0016] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figure 1-2 , and describes the application in detail with reference to embodiments.

[0017] See also Figure 1 and Figure 2 , a universal modular lifting limit mechanism, comprising a pair of inductive proximity sensors 1 and an inductive sheet 2 used in conjunction with the inductive proximity sensors 1; the lifting limit mechanism comprises a sensor mounting base 4 with an accommodating cavity 3 therein; each inductive proximity sensor 1 is fixedly mounted on a sensor bracket 5, and a pair of sensor brackets 5 are fixedly mounted in the accommodating cavity 3 of the sensor mounting base 4; an inductive proximity sensor 1 and a sensor bracket 5 fixing the inductive proximity sensor 1 constitute an upper limit sensor module; another inductive proximity sensor 1 and a sensor bracket 5 fixing the inductive proximity sensor 1 constitute a lower limit sensor module; an oil-free bushing 6 is fixedly mounted on the sensor mounting base 4, and the oil-free bushing 6 is slidably sleeved on a guide shaft 7, one end of the guide shaft 7 is fixedly mounted with the inductive sheet 2, and the other end of the guide shaft 7 is fixedly mounted with a spring preload sheet 8; during the sliding process of the guide shaft 7 along the oil-free bushing 6, one end of the guide shaft 7 fixedly mounted with the inductive sheet 2 passes through the pair of inductive proximity sensors 1 in sequence;

[0018] The spring 9 is sleeved on the guide shaft 7 , one end of the spring 9 abuts against the oil-free bushing 6 , and the other end of the spring 9 abuts against the spring preload sheet 8 .

[0019] In this embodiment, one end of the guide shaft 7 on which the sensing piece 2 is fixedly mounted is located inside the accommodating cavity 3 of the sensor mounting base 4, and the other end of the guide shaft 7 on which the sensing piece 2 is fixedly mounted is located outside the accommodating cavity 3 of the sensor mounting base 4;

[0020] In this embodiment, the sensor bracket 5 is fixedly installed in the accommodating cavity 3 of the sensor mounting base 4 in a detachable manner. The sensor mounting base 4 is provided with a waist hole 10, a pair of waist holes 10, and a pair of waist holes 10 are located on the same side of the sensor mounting base 4; the sensor bracket 5 is fixedly installed in the accommodating cavity 3 of the sensor mounting base 4 by bolts passing through the waist holes 10, and the bolts pass through the waist holes 10 and are fixedly connected to the sensor bracket 5. When connected, the nut abuts against the outer surface of the sensor mounting base 4. The distance between the pair of sensor brackets 5 can be adjusted by adjusting and loosening the nut, which is adapted to the application requirements of the specific measurement scene. Moreover, the distance adjustment operation is convenient. A mounting plate 11 is fixedly connected to the sensor mounting base 4, and a mounting hole 12 is provided on the mounting plate 11. In this embodiment, a mounting hole 12 is provided at each of the four corners of the mounting plate 11.

[0021] During installation, a suitable position is selected below the lifting plate where the lifting device is located, and the limiting mechanism provided in this embodiment is installed at the position. In this embodiment, the sensor mounting base 4 is fixedly mounted on the lifting device through the mounting hole 12 on the mounting plate 11.

[0022] When the lifting device descends, the lower end surface of the lifting plate on the device contacts the upper end surface of the spring preloaded sheet 8. When the lifting plate on the device moves downward, the spring preloaded sheet 8 also moves downward at the same time. At this time, the spring 9 is compressed, and the guide shaft 7 installed on the lower end surface of the spring preloaded sheet 8 slides downward along the oil-free bushing 6. The induction sheet 2 installed at the other end of the guide shaft 7 slides downward at the same time. The side of the induction sheet 2 moves away from the sensing area of ​​the induction proximity sensor 1 at the upper end. At this time, the upper limit signal disappears. When the lifting plate continues to move downward, the spring preloaded sheet 8 also moves downward at the same time. At this time, the spring 9 is compressed, and the guide shaft 7 installed on the lower end surface of the spring preloaded sheet 8 continues to slide downward along the oil-free bushing 6. The induction sheet 2 installed at the other end of the guide shaft 7 slides downward at the same time. The side of the induction sheet 2 approaches the sensing area of ​​the induction proximity sensor 1 at the lower end. At this time, the lower limit signal is triggered, indicating that the lifting lowest position has been reached and the lifting plate stops descending.

[0023] When the lifting device is lifted, when the lifting plate on the device moves upward, the spring preloaded sheet 8 moves upward with the lifting plate due to the elastic force of the spring 9. The upper end surface of the spring preloaded sheet 8 is close to the lower end surface of the lifting plate. The guide shaft 7 installed on the lower end surface of the spring preloaded sheet 8 slides upward through the oil-free bushing 6. The side of the induction sheet 2 is away from the sensing area of ​​the induction proximity sensor 1 at the lower end. At this time, the lower limit signal disappears. When the lifting plate continues to move upward, the spring preloaded sheet 8 continues to move upward with the lifting plate due to the elastic force of the spring 9. The guide shaft 7 installed on the lower end surface of the spring preloaded sheet 8 continues to slide upward through the oil-free bushing 6. The induction sheet 2 installed at the other end of the guide shaft 7 slides upward at the same time. Until the side of the induction sheet 2 approaches the sensing area of ​​the induction proximity sensor 1 at the upper end. It indicates that the highest lifting position has been reached. The lifting plate stops rising.

[0024] This embodiment provides a universal modular lifting limit mechanism. When installing, you only need to select a suitable position on the limit mechanism for installation. After installation, you only need to perform a calibration operation on the entire limit mechanism once, and there is no need to calibrate these devices in batches, which saves operation steps and operation time, and makes it easier to find a suitable position. By installing the sensor bracket 5 inside the accommodating cavity 3 of the sensor mounting base 4, the interference of the external environment on the pair of inductive proximity sensors 1 can be reduced, and the accuracy of the measurement results can be improved.

[0025] This embodiment defines that the sensor bracket 5 and the sensor mounting base 4 are connected in a detachable fixed manner, so that the distance between the upper limit sensor module and the lower limit sensor module can be adjusted to meet the needs of different measurement scenarios and expand the types of applicable scenarios of the lifting device; the sensor bracket 5 and the sensor mounting base 4 are connected in a detachable fixed manner, so that the distance between the upper limit sensor module and the lower limit sensor module can be adjusted to meet the needs of different measurement scenarios and expand the types of applicable scenarios of the lifting device; by setting the waist hole 10, the operator does not need to put his hand deep into the accommodating cavity 3 to directly adjust the distance between the upper limit sensor module and the lower limit sensor module. Make the adjustment operation more convenient; by defining a pair of waist holes 10, the sensor bracket 5 is fixedly connected to the sensor mounting base 4 by two bolts; the sensor bracket 5 is more stable.

[0026] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal modular lifting limit mechanism, comprising a pair of inductive proximity sensors (1) and a sensing sheet (2) for use with the inductive proximity sensors (1); It is characterized in that The lifting limit mechanism comprises a sensor mounting base (4) having an accommodation cavity (3) therein, each of the inductive proximity sensors (1) being fixedly mounted on a sensor bracket (5), and a pair of the sensor brackets (5) being fixedly mounted in the accommodation cavity (3) of the sensor mounting base (4); one of the inductive proximity sensors (1) and the sensor bracket (5) fixing the inductive proximity sensor (1) constitute an upper limit sensor module; another of the inductive proximity sensors (1) and the sensor bracket (5) fixing the inductive proximity sensor (1) constitute a lower limit sensor module; the sensor mounting base ( 4) is fixedly mounted with an oil-free bushing (6), the oil-free bushing (6) is slidably sleeved on a guide shaft (7), one end of the guide shaft (7) is fixedly mounted with a sensing sheet (2), and the other end of the guide shaft (7) is fixedly mounted with a spring preload sheet (8); when the guide shaft (7) slides along the oil-free bushing (6), one end of the guide shaft (7) on which the sensing sheet (2) is fixedly mounted passes through a pair of inductive proximity sensors (1) in sequence; a spring (9) is sleeved on the guide shaft (7), one end of the spring (9) abuts against the oil-free bushing (6), and the other end of the spring (9) abuts against the spring preload sheet (8); The sensor bracket (5) is fixedly mounted in the accommodating cavity (3) of the sensor mounting base (4) in a detachable manner; The sensor mounting base (4) is provided with a waist hole (10) for facilitating adjustment of the distance between the upper limit sensor module and the lower limit sensor module, and the sensor bracket (5) is fixedly mounted in the accommodating cavity (3) of the sensor mounting base (4) by means of bolts passing through the waist hole (10); The waist holes (10) are a pair in total, and the pair of waist holes (10) are located on the same side of the sensor mounting base (4); A mounting plate (11) is fixedly connected to the sensor mounting base (4), and a mounting hole (12) is provided on the mounting plate (11).

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