A conveying device with motor protection function

Abstract

The utility model provides a conveying device with motor protection function relates to motor protection field, and this conveying device includes: frame, transmission structure is connected with frame swing, drive motor is used for driving transmission structure to carry out transmission movement, and drive motor is connected with frame floating, to make drive motor can move in vertical direction relative frame, and drive motor includes casing and sensing part, and sensing part protrudes the outer surface of casing, cylinder, one end is connected with frame, and the other end is connected with sensing part, is used for in the state that drive motor is normal operation makes sensing part be located initial position, sensing device is located sensing part one side, and sensing device includes fault sensor, and fault sensor is spaced apart preset distance with initial position in vertical direction, and electric control device is used for controlling drive motor shutdown in the state that sensing part moves to the position where fault sensor is located. This conveying device can protect motor more reliably.

Description

Technical Field

[0001] This utility model relates to the field of motor protection, and in particular to a conveying device with motor protection function. Background Technology

[0002] In conveying devices, the movement of the conveying structure is driven by a drive motor. If the drive motor or related structures malfunction, the drive motor must be stopped in time to prevent damage to the electric drive motor or injury to personnel.

[0003] In related conveying devices, frequency converters are used to passively protect the motor. However, if the frequency converter fails or is not properly selected, a major accident may occur, resulting in poor protection of the motor. Utility Model Content

[0004] This utility model provides a conveying device with motor protection function to solve the technical problem of how to improve the protection effect of motor.

[0005] This utility model embodiment provides a conveying device with a motor protection function. The conveying device includes: a frame; a conveying structure movably connected to the frame; a drive motor for driving the conveying structure to perform transmission motion, the drive motor being floatingly connected to the frame so that the drive motor can move relative to the frame in the vertical direction, the drive motor including a housing and a sensing part, the sensing part extending out of the outer surface of the housing; a cylinder, one end connected to the frame and the other end connected to the sensing part, for positioning the sensing part in an initial position when the drive motor is operating normally; a sensing device located on one side of the sensing part, the sensing device including a fault sensor, the fault sensor being spaced a preset distance from the initial position in the vertical direction; and an electronic control device for controlling the drive motor to stop when the sensing part moves to the position of the fault sensor.

[0006] In some embodiments, the sensing portion is used to drive the cylinder to move to the location of the fault sensor.

[0007] In some embodiments, the cylinder has a solenoid valve. When the solenoid valve is open, the cylinder can hold the sensing part in the initial position. When the solenoid valve is closed, the sensing part can drive the cylinder to move. The conveying device further includes a first power supply line and a first circuit detection device. The first power supply line is used to supply power to the drive motor, and the first circuit detection device is used to control the solenoid valve to close when a fault is detected in the first power supply line.

[0008] In some embodiments, the cylinder forms a gas spring, and the elastic force of the gas spring holds the sensing part in the initial position.

[0009] In some embodiments, the conveying device further includes a buffer spring that connects the housing and the frame.

[0010] In some embodiments, the cylinder is used to drive the sensing part to move in the vertical direction; wherein, the conveying device further includes a second power supply line and a second circuit detection device, the second power supply line is used to supply power to the drive motor, and the second circuit detection device is used to control the cylinder to drive the sensing part to the location of the faulty sensor when a fault is detected in the second power supply line.

[0011] In some embodiments, there are multiple fault sensors, with at least two of the fault sensors located on either side of the initial position in the vertical direction.

[0012] In some embodiments, the sensing device further includes an intermediate position sensor located at the initial position.

[0013] In some embodiments, the conveying device further includes a protective cover fixedly connected to the frame, the protective cover and the frame surrounding each other to form a protective space, the electrical control device being located within the protective space, a portion of the sensing device being located within the protective space, and the end of the sensing device near the sensing portion extending out of the protective space.

[0014] In some embodiments, the conveying structure is movable between the disassembly / assembly station and the inspection station; wherein the conveying device further includes: a protective plate located between the disassembly / assembly station and the inspection station, and the protective plate having an opening through which the conveying structure passes; and a protective door movably connected to the protective plate for controlling the covering and opening of the opening.

[0015] This utility model embodiment provides a conveying device with motor protection function. The conveying device includes a frame, a conveying structure movably connected to the frame, and a drive motor for driving the conveying structure to perform transmission motion. The drive motor is floatingly connected to the frame so that the drive motor can move relative to the frame in the vertical direction. The drive motor includes a housing and a sensing part, with the sensing part extending out of the outer surface of the housing. The conveying device also includes a cylinder, a sensing device, and an electronic control device. One end of the cylinder is connected to the frame, and the other end is connected to the transmission part. The sensing device is located on one side of the sensing part and includes a fault sensor. The fault sensor is spaced a preset distance from the initial position in the vertical direction. The electronic control device controls the drive motor to stop when the sensing device moves to the location of the fault sensor. Therefore, when a fault is detected in the drive motor or its power supply line, the drive motor can be stopped through a mechanical structure, thus providing more reliable protection for the drive motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a conveying device with motor protection function provided in an embodiment of the present invention;

[0017] Figure 2 An assembly diagram of a drive motor, frame, and sensing device in a conveying device with motor protection function provided in an embodiment of this utility model;

[0018] Figure 3 A schematic diagram of the assembly of a cylinder with a solenoid valve and a drive motor in a conveying device with motor protection function provided in this embodiment of the utility model.

[0019] Figure 4 A schematic diagram of the structure of a sensing device in a conveying device with motor protection function provided in an embodiment of this utility model;

[0020] Figure 5 A schematic diagram of a protective cover and frame assembly in a conveyor device with motor protection function provided in an embodiment of this utility model;

[0021] Figure 6 This invention provides a schematic diagram of another conveyor device with motor protection function as an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 100. Frame; 200. Conveying device; 300. Drive motor; 310. Housing; 320. Sensing component; 400. Cylinder; 410. Solenoid valve; 500. Sensing device; 510. Fault sensor; 520. Intermediate sensor; 600. Electrical control device; 800. Protective cover; 910. Protective plate; 911. Opening; 920. Protective door. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The specific technical features described in the various embodiments in the detailed implementation can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0026] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0027] Additionally, it should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate any similarity or connection between them. It should be understood that the directional descriptions such as "above," "below," "inside," and "outside" refer to the orientation under normal use conditions.

[0028] In the following specific embodiments, the conveyor device with motor protection function can be applied to any system that requires transmission. For example, the conveyor device can be applied to a processing production line to transfer workpieces between different processing stations; for example, the conveyor device can also be applied to an inspection system to transfer workpieces between assembly / disassembly stations and inspection stations. The structure and function of this conveyor device with motor protection function are described below with reference to various embodiments.

[0029] In some embodiments, such as Figure 1As shown, the conveying device with motor protection function includes a frame 100, a conveying structure 200, a drive motor 300, a cylinder 400, a sensing device 500, and an electrical control device 600. The frame 100 provides installation space for other structures. The conveying structure 200 is movably connected to the frame 100 to enable the transfer of workpieces. The conveying structure 200 can be any structure capable of transmission. For example, the transmission structure 200 can be a transmission belt, or it can also be a cable chain structure.

[0030] The drive motor 300 is used to drive the conveyor structure 200 for transmission motion. Simultaneously, the drive motor 300 is floatingly connected to the frame 100, allowing the drive motor 300 to move vertically relative to the frame 100. For example... Figure 2 As shown, the drive motor 300 includes a housing 310 and a sensing portion 320, with the sensing portion 320 extending out of the outer surface of the housing 310.

[0031] One end of the cylinder 400 is connected to the frame 100, and the other end of the cylinder 400 is connected to the sensing part 320. The cylinder 400 enables the sensing part 320 to be in its initial position. It should be noted that the sensing part 320 can move in any way. For example, the sensing part 320 can be actively driven by the movement of the cylinder 400, that is, when a fault is detected in the power supply line of the drive motor 300, the sensing part 320 can be actively pulled or pushed to move in the vertical direction. For example, the sensing part 320 can move longitudinally under the action of external force or vibration of the drive motor 300, that is, the sensing part 320 is used as a fault sensing part, and the sensing part 320 is moved when the drive motor 300 generates excessive vibration or is subjected to excessive external force. The cylinder 400 is used to keep the sensing part 320 in its initial position when the drive motor 300 is in a normal state. The following explains the movement of the sensing part 320 and the relative position of the sensing device 500, as well as the principle of how the sensing part 320 works through the sensing device 500 and the electronic control device 600.

[0032] The sensing device 500 is located on one side of the sensing section 320. The sensing device 500 includes a fault sensor 510, which is positioned vertically at a preset distance from the initial position. The sensing section 320 is vertically movable. If the sensing section 320 moves vertically from the initial position to the position of the fault sensor 510, the sensing device 500 outputs a control signal to the electronic control device 600. The electronic control device 600 responds to this control signal by stopping the drive motor 300, thereby protecting the drive motor 300. It should be noted that because the sensing section 320 is a mechanical structure, its reliability is higher than that of an electronic control system. Therefore, it can reliably stop the drive motor 300 in the event of a fault in the drive motor 300 or its power supply, thus providing more reliable protection for the drive motor 300.

[0033] This utility model embodiment provides a conveying device with motor protection function. The conveying device includes a frame, a conveying structure movably connected to the frame, and a drive motor for driving the conveying structure to perform transmission motion. The drive motor is floatingly connected to the frame so that the drive motor can move relative to the frame in the vertical direction. The drive motor includes a housing and a sensing part, with the sensing part extending out of the outer surface of the housing. The conveying device also includes a cylinder, a sensing device, and an electronic control device. One end of the cylinder is connected to the frame, and the other end is connected to the transmission part. The sensing device is located on one side of the sensing part and includes a fault sensor. The fault sensor is spaced a preset distance from the initial position in the vertical direction. The electronic control device controls the drive motor to stop when the sensing device moves to the location of the fault sensor. Therefore, when a fault is detected in the drive motor or its power supply line, the drive motor can be stopped through a mechanical structure, thus providing more reliable protection for the drive motor.

[0034] In some embodiments, such as Figure 2 As shown, the sensing part 320 is used to drive the cylinder 400 to move to the position where the fault sensor 510 is located. It can be understood that the cylinder 400 is used to keep the sensing part 320 in the initial position, and the movement of the sensing part 320 overcomes the force provided by the cylinder 400 to move. That is, by setting the sensing part 320 as part of the drive motor 300, the vibration of the drive motor 300 or the force borne by the drive motor 300 can be used as the driving force of the sensing part 320, so that no other active drive device is needed.

[0035] In some embodiments, such as Figure 2As shown, cylinder 400 forms a gas spring, and the elastic force of this gas spring keeps the sensing part 320 in its initial position. That is, cylinder 400 soft-locks the sensing part 320. Cylinder 400 applies a small elastic force to the sensing part 320, allowing the sensing part 320 to float up and down from its initial position, with the elastic force increasing the further away from the initial position. This soft-locking structure allows the sensing part 320 to be used as part of a fault detection structure, thus eliminating the need for an additional fault detection structure. Specifically, when the vibration of the drive motor 300 is too large, a fault is determined to have occurred in the drive motor 300. In this case, the vibration of the drive motor 300 will cause the sensing part 320 to overcome the force of cylinder 400. The provided elastic force causes the sensing part 320 to move to the location of the fault sensor 510, thereby causing the electronic control device 600 to control the drive motor 300 to stop. Alternatively, if the drive motor 300 is subjected to a large external force and it is determined that the drive motor 300 has suffered a severe impact and continued operation may damage the drive motor 300, the sensing part 320 overcomes the elastic force provided by the cylinder 400 under the action of the external force and moves to the location of the fault sensor 510. Moreover, the cylinder 400 acts as a gas spring and can also buffer the vibration of the drive motor 300 during normal operation, thereby reducing the impact of the vibration of the drive motor 300 on the frame.

[0036] Optionally, the conveying device also includes a buffer spring, which connects the drive motor 300 and the frame 100. The buffer spring and the cylinder 400 work together to buffer the vibration of the drive motor 300, thereby further reducing the impact of the vibration of the drive motor 300 on the frame 100.

[0037] In some embodiments, such as Figure 3 As shown, cylinder 400 has a solenoid valve 410. When the solenoid valve 410 is open, cylinder 400 can keep the sensing part 320 in its initial position. When the solenoid valve 410 is closed, the sensing part 320 can drive cylinder 400 to move, that is, cylinder 400 hard locks the sensing part 320. Cylinder 400 applies a large force to the sensing part 320 to completely lock the sensing part 320 in its initial position. When a fault is detected in the drive motor 300, the solenoid valve 410 is closed to keep the sensing part 320 in its initial position. The cylinder 400 can move to the location of the fault sensor 510. Specifically, the conveying device also includes a first power supply line and a first circuit detection device. The first power supply line is used to supply power to the drive motor 300, and the first circuit detection device is used to detect the first power supply line. When the first circuit detection device detects a fault in the first power supply line, it controls the solenoid valve 410 to close, thereby releasing the hard lock of the cylinder 400 on the sensing part 320. The sensing part 320 can then move to the location of the fault sensor 510, thereby reliably stopping the drive motor 300.

[0038] In some embodiments, such as Figure 2 As shown, the cylinder 400 is used to drive the sensing part 320 to move in the vertical direction. That is, when the cylinder 400, as a driving structure, detects a fault in the drive motor 300 or a fault in the power supply device of the drive motor 300, it actively pushes or pulls the sensing part 320 to the location of the fault sensor 510, thereby reliably stopping the drive motor 300. Specifically, the conveying device also includes a second power supply line and a second circuit detection device. The second power supply line is used to supply power to the drive motor 300, and the second circuit detection device is used to detect the status of the second power supply line. When the second circuit detection device detects a fault in the second power supply line, the cylinder 400 drives the sensing part 320 to move to the location of the fault sensor 510.

[0039] In some embodiments, such as Figure 4 As shown, there are multiple fault sensors 510. In the vertical direction, at least two fault sensors are located on both sides of the initial position, so that the movement of the sensing part 320 in both directions of the vertical direction can move to the position of the fault sensor 510, thereby enabling more reliable detection of the fault state of the drive motor 300, and / or more reliable control of the drive motor 300 to stop.

[0040] In some embodiments, such as Figure 4 As shown, the sensing device 500 also includes an intermediate position sensor 520. The intermediate position sensor 520 is located at the initial position. With the intermediate position sensor 520, the cylinder 400 can more reliably keep the sensing part 320 in the initial position when the drive motor 300 is in normal operation. That is, feedback control is formed between the intermediate sensor 520 and the cylinder 400, so that the cylinder 400 can reliably keep the sensing part 320 in the initial position.

[0041] In some embodiments, such as Figure 5 As shown, the conveying device also includes a protective cover 800, which is fixedly connected to the frame 100. The protective cover 800 and the frame 100 together form a protective space. Figure 1 The electronic control device 600 is located within this protective space, thereby protecting the electronic control device 600. Meanwhile... Figure 1 A portion of the sensing device 500 is located within the protective space, and the end of the sensing device 500 near the sensing portion 320 extends out of the protective space, thereby detecting the position of the sensing portion 320 by the portion extending out of the protective space.

[0042] In some embodiments, such as Figure 6As shown, the conveying structure 200 can move between the assembly / disassembly station and the inspection station. For example, a mounting platform is provided on the conveying structure, and the workpiece to be conveyed can be fixed on the mounting platform. The conveying structure can move the mounting platform between the assembly / disassembly station and the inspection station. Specifically, at the assembly / disassembly station, the operator can install the workpiece to be inspected on the mounting platform. Then, the conveying structure 200 can move the mounting platform with the workpiece to the inspection station to inspect the workpiece. After the inspection is completed, the conveying structure 200 moves the workpiece back to the assembly / disassembly station so that the operator can remove the inspected workpiece from the mounting platform and install the next workpiece to be inspected.

[0043] The conveying device also includes a protective plate 910 and a protective door 920. The protective plate 910 is located between the disassembly / assembly station and the inspection station, so that the inspection device at the inspection station will not affect the workers at the disassembly / assembly station, thus protecting the workers. At the same time, the protective plate 910 has an opening 911 through which the conveying structure 200 can move between the workpiece disassembly / assembly station and the inspection station through the opening 911. The protective door 920 is movably connected to the protective plate 910 and is used to control the covering and opening of the opening 911. That is, when it is necessary for the workpiece to pass through the opening 911, the protective door 920 keeps the opening 911 open. During the inspection of the workpiece at the inspection station, the protective door 920 covers part of the opening 911, reducing the impact of the inspection station on the disassembly / assembly station without interfering with the movement of the conveying structure 200.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A conveying device with motor protection function, characterized in that, The conveying device includes: frame; A conveying structure is movably connected to the frame; A drive motor is used to drive the conveying structure to perform transmission motion. The drive motor is floatingly connected to the frame so that the drive motor can move relative to the frame in the vertical direction. The drive motor includes a housing and a sensing part, and the sensing part extends out of the outer surface of the housing. A cylinder, one end of which is connected to the frame and the other end of which is connected to the sensing part, is used to keep the sensing part in its initial position when the drive motor is running normally. A sensing device is located on one side of the sensing part. The sensing device includes a fault sensor, which is spaced at a preset distance from the initial position in the vertical direction. An electronic control device is used to control the drive motor to stop when the sensing part moves to the location of the fault sensor.

2. The conveying device according to claim 1, characterized in that, The sensing component is used to drive the cylinder to move and can move to the location of the fault sensor.

3. The conveying device according to claim 2, characterized in that, The cylinder has a solenoid valve. When the solenoid valve is open, the cylinder can keep the sensing part in the initial position. When the solenoid valve is closed, the sensing part can drive the cylinder to move. The conveying device further includes a first power supply line and a first circuit detection device. The first power supply line is used to supply power to the drive motor, and the first circuit detection device is used to control the solenoid valve to close when a fault is detected in the first power supply line.

4. The conveying device according to claim 2, characterized in that, The cylinder forms a gas spring, and the elastic force of the gas spring keeps the sensing part in the initial position.

5. The conveying device according to claim 4, characterized in that, The conveying device also includes a buffer spring, which connects the housing and the frame.

6. The conveying device according to claim 1, characterized in that, The cylinder is used to drive the sensing part to move in the vertical direction; The conveying device further includes a second power supply line and a second circuit detection device. The second power supply line is used to supply power to the drive motor, and the second circuit detection device is used to control the cylinder to move the sensing part to the location of the fault sensor when the second power supply line is faulty.

7. The conveying device according to claim 1, characterized in that, The fault sensor is multiple, and in the vertical direction, at least two of the fault sensors are located on both sides of the initial position.

8. The conveying device according to claim 1 or 7, characterized in that, The sensing device further includes an intermediate position sensor, which is located at the initial position.

9. The conveying device according to claim 1, characterized in that, The conveying device also includes a protective cover, which is fixedly connected to the frame. The protective cover and the frame surround each other to form a protective space. The electrical control device is located in the protective space, and part of the sensing device is located in the protective space. The end of the sensing device near the sensing part extends out of the protective space.

10. The conveying device according to claim 1, characterized in that, The conveying structure is capable of moving between the assembly / disassembly station and the inspection station; The conveying device further includes: A protective plate is located between the disassembly / assembly station and the testing station, and the protective plate has an opening through which the conveying structure passes. A protective door, movably connected to the protective panel, is used to control the covering and opening of the opening.

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