Roller motor

Abstract

The present application relates to the technical field of conveying devices. Disclosed is a roller motor, comprising a roller and a drive member, the drive member being used for driving the roller to rotate. The roller motor further comprises: a first measurement assembly, which comprises a first magnet and a first Hall element, the first magnet being fixedly connected to the rear end of an output shaft of the drive member, the roller being fixedly connected to the front end of the output shaft of the drive member, and the first Hall element being used for sensing the change of a magnetic field of the first magnet so as to measure the rotation speed of the output shaft; and a second measurement assembly, which comprises a second magnet and a second Hall element, the second magnet being fixedly connected to the roller, and the second Hall element being used for sensing the change of a magnetic field of the second magnet so as to measure the rotation speed of the roller. The roller motor can simultaneously measure the rotation speed of the drive member and the rotation speed of the roller, and in combination with a control mechanism, can improve the control precision of the rotation speed of the roller.

Description

Drum motor

[0001] This application claims priority to the Chinese patent application with application number 202322566799.8 and invention name “Drum Motor” filed with the Patent Office of China on September 20, 2023, and priority to the Chinese patent application with application number 202311221806.9 and invention name “Drum Motor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of conveying devices, and in particular to a roller motor. Background Art

[0003] Drum motors are commonly used in various heavy object transport scenarios, using a motor to drive the drum's rotation. Existing drum motors often use a Hall effect PCB to measure the motor output shaft speed, which is then interpreted as the drum's speed. The Hall effect PCB transmits this measured data to the control circuit, which further controls the motor speed, ultimately achieving controllable drum speed. However, because the motor output shaft speed and the drum's speed are not completely synchronized, the drum's speed control accuracy is low. Technical issues

[0004] In view of this, the present application provides a drum motor to solve the problem of low drum speed control accuracy of the drum motor in the prior art. Technical Solutions

[0005] An embodiment of the present application provides a drum motor, comprising a drum and a driving member connected to each other, wherein the driving member is used to drive the drum to rotate, and the drum motor further comprises:

[0006] a first detection assembly, comprising a first magnet and a first Hall element, wherein the first magnet is fixedly connected to the rear end of the output shaft of the driving member, and the roller is fixedly connected to the front end of the output shaft of the driving member, and the first Hall element is used to sense changes in the magnetic field of the first magnet to detect the rotational speed of the output shaft;

[0007] The second detection component includes a second magnet and a second Hall element. The second magnet is fixedly connected to the drum. The second Hall element is used to sense the change in the magnetic field of the second magnet to detect the rotation speed of the drum.

[0008] In one embodiment, the drum motor further includes a control mechanism electrically connected to the first Hall element, the second Hall element and the driving member, respectively, and the control mechanism is used to receive the detection signal emitted by the first Hall element and the detection signal emitted by the second Hall element, and control the rotational speed of the driving member.

[0009] In one embodiment, a receiving cavity is provided in the drum, and the driving member, the first detection assembly and the second detection assembly are all accommodated in the receiving cavity.

[0010] In one embodiment, the drum motor further comprises:

[0011] a driving member fixing mechanism, fixedly connected to one end of the driving member and at least partially extending outside the accommodating cavity, the driving member fixing mechanism being used to fix the driving member so that the driving member is spaced apart from the roller;

[0012] The roller supporting mechanism is located at one end of the roller away from the driving member fixing mechanism and partially extends outside the accommodating cavity. The roller supporting mechanism is used to support the roller.

[0013] In one embodiment, the driving member includes a driving housing and a driving body, wherein a receiving space is provided in the driving housing, and the driving body includes the output shaft;

[0014] The driving member fixing mechanism includes a fixedly connected support member and a connecting member, the support member extends outside the accommodating cavity, the connecting member is accommodated in the accommodating space, and the connecting member and the driving housing are in a circular transition fit, and the first Hall element is arranged on the side of the connecting member facing the output shaft.

[0015] In one embodiment, the drum motor further includes a positioning member fixedly connected to the connecting member, and the first Hall element is fixedly connected to the positioning member.

[0016] In one embodiment, the second magnet is a ring magnet, the second Hall element and the second magnet are both mounted on the support member, the second Hall element is spaced apart from the roller, and the second magnet is fixedly connected to the inner wall of the roller.

[0017] In one embodiment, the drum motor further includes an end cover, wherein the end cover is partially embedded in the drum and fixedly connected to the drum, the end cover is provided with an installation channel, the support member passes through the installation channel and extends outside the accommodating cavity, and the second magnet is fixedly installed in the installation channel.

[0018] In one embodiment, the end cover includes a stopper provided in the installation channel, and a side of the second magnet facing away from the second Hall element abuts against the stopper.

[0019] In one embodiment, the second magnet is a block magnet, the second magnet is fixed on a mounting ring, the second Hall element and the mounting ring are both mounted on the support member, the second Hall element is spaced apart from the roller, and the mounting ring is fixedly connected to the inner wall of the roller. Beneficial effects

[0020] The above-mentioned drum motor includes a drum and a driving member, a first detection component and a second detection component. The first detection component includes a first Hall element and a first magnet fixedly connected to the rear end of the output shaft of the driving member. When the first magnet rotates with the output shaft of the driving member, the first Hall element can detect the rotational speed of the first magnet and the output shaft according to the magnetic field change of the first magnet; the second detection component includes a second Hall element and a second magnet fixedly connected to the drum. When the second magnet rotates with the drum, the second Hall element can detect the rotational speed of the second magnet and the drum according to the magnetic field change of the second magnet, and then detect the moving distance accuracy of the material box during the drum transmission process in real time, thereby improving the control accuracy. That is, the above-mentioned drum motor can simultaneously detect the rotational speed of the driving member and the rotational speed of the drum. Combined with the control mechanism, it can improve the control accuracy of the drum speed, thereby solving the problem of low drum speed control accuracy of the drum motor in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 is a perspective schematic diagram of a drum motor provided in an embodiment of the present application;

[0023] FIG2 is a perspective exploded schematic diagram of the drum motor shown in FIG1 ;

[0024] FIG3 is a perspective schematic diagram of the driving member of the drum motor shown in FIG2 from another angle;

[0025] FIG4 is a perspective exploded schematic diagram of the driving member, the driving member fixing mechanism, the first detection assembly, and the second detection assembly in the drum motor shown in FIG2 ;

[0026] FIG5 is a perspective exploded schematic diagram of the first Hall element, the positioning member, and the connecting member in the drum motor shown in FIG4 from another angle;

[0027] FIG6 is a perspective schematic diagram of a positioning member in the drum motor shown in FIG3 ;

[0028] FIG7 is a schematic diagram of a module of the drum motor shown in FIG1 .

[0029] The meanings of the marks in the figure are:

[0030] 100. Drum motor;

[0031] 10. Roller; 11. Accommodating chamber;

[0032] 20. Driving member; 21. Output shaft; 22. Driving housing; 23. Driving body; 24. Connecting rod;

[0033] 31. First magnet; 32. First Hall element; 33. Fixing clip;

[0034] 41. Second magnet; 42. Second Hall element;

[0035] 51. Control mechanism; 52. Transmission mechanism; 53. Tensioning mechanism; 54. Driver fixing mechanism; 541. Support member; 542. Connecting member; 55. Roller supporting mechanism; 56. Positioning member; 561. Positioning ring; 562. Extension rod; 563. Protrusion; 564. Connecting hole; 565. Boss;

[0036] 60. End cover; 61. Stopper; 62. First body; 63. Second body. Modes for Carrying Out the Invention

[0037] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the following further describes this application in detail with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0038] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0040] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0041] In order to illustrate the technical solution described in this application, the following description is given with reference to specific drawings and embodiments.

[0042] The embodiments of the present application provide a drum motor that can detect the rotational speed of a driving member and a drum in real time to achieve closed-loop control.

[0043] Referring to Figures 1 to 4, in one embodiment of the present application, a drum motor 100 includes a drum 10, a driver 20, a first detection assembly, and a second detection assembly connected thereto. The driver 20 is configured to rotate the drum 10. The driver 20 can be a DC motor, an asynchronous motor, or a synchronous motor. The driver 20 has an output shaft 21, which includes a front end and a rear end distributed along the axial direction.

[0044] The first detection component includes a first magnet 31 and a first Hall element 32. The first magnet 31 is fixedly connected to the rear end of the output shaft 21 of the driving member 20. The first magnet 31 can rotate with the rotation of the output shaft 21 of the driving member 20, and the magnetic field distribution of the first magnet 31 will change; the drum 10 is fixedly connected to the front end of the output shaft 21 of the driving member 20, that is, the drum 10 and the first magnet 31 are respectively connected to the opposite ends of the output shaft 21. In this way, when assembling the drum motor 100, the connection between the drum 10 and the driving member 20, and the connection between the first magnet 31 and the driving member 20 are independent of each other and do not affect each other, which is convenient for disassembly and assembly.

[0045] The second detection component includes a second magnet 41 and a second Hall element 42 . The second magnet 41 is fixedly connected to the drum 10 . The second magnet 41 can rotate with the rotation of the drum 10 , and the magnetic field distribution of the second magnet 41 will change.

[0046] Both the first Hall effect element 32 and the second Hall effect element 42 are solid-state electronic devices that utilize the Hall effect. They are sensitive to magnetic field changes and offer high precision. The first Hall effect element 32 senses changes in the magnetic field of the first magnet 31 to detect the rotational speed of the output shaft 21; the second Hall effect element 42 senses changes in the magnetic field of the second magnet 41 to detect the rotational speed of the drum 10. Since the drum 10 is often used to transport a material box, the second Hall effect element 42, while detecting the rotational speed of the drum 10, can also accurately measure the distance traveled by the material box during transport by the drum 10, thereby improving control accuracy.

[0047] The above-mentioned drum motor 100 includes a drum 10 and a driving member 20, a first detection component and a second detection component. The first detection component includes a first Hall element 32 and a first magnet 31 fixedly connected to the rear end of the output shaft 21 of the driving member 20. When the first magnet 31 rotates with the output shaft 21 of the driving member 20, the first Hall element 32 can detect the rotational speed of the first magnet 31 and the output shaft 21 according to the magnetic field change of the first magnet 31; the second detection component includes a second Hall element 42 and a second magnet 41 fixedly connected to the drum 10. When the second magnet 41 rotates with the drum 10, the second Hall element 42 can detect the rotational speed of the second magnet 41 and the drum 10 according to the magnetic field change of the second magnet 41, thereby detecting the moving distance accuracy of the material box during the transmission process of the drum 10 in real time and improving the control accuracy. That is, the above-mentioned drum motor 100 can simultaneously detect the rotational speed of the driving member 20 and the rotational speed of the drum 10. Combined with the control mechanism, it can improve the control accuracy of the rotational speed of the drum 10, thereby solving the problem of low drum speed control accuracy of the drum motor in the prior art.

[0048] The first Hall element 32 includes a first PCB and a first Hall sensor disposed on the first PCB, and the first magnet 31 is located within the magnetic detection range of the first Hall sensor. Preferably, the sensing surface of the first Hall sensor faces the first magnet 31.

[0049] Accordingly, the second Hall element 42 includes a second PCB and a second Hall sensor provided on the second PCB, and the second magnet 41 is located within the magnetic detection range of the second Hall sensor. Preferably, the sensing surface of the second Hall sensor faces the second magnet 41.

[0050] Please refer to Figures 1 and 7. In one embodiment of the present application, the drum motor 100 also includes a control mechanism 51, which is electrically connected to the first Hall element 32, the second Hall element 42 and the driving member 20, respectively. The control mechanism 51 is used to receive the detection signal emitted by the first Hall element 32 and the detection signal emitted by the second Hall element 42, and control the rotational speed of the driving member 20 to adjust the rotational speed of the driving member 20 according to the rotational speed of the drum 10 to achieve closed-loop control.

[0051] It can be understood that when the rotation speed of the drum 10 is greater than the expected speed, the control mechanism 51 can reduce the rotation speed of the driving member 20; when the rotation speed of the drum 10 is less than the expected speed, the control mechanism 51 can increase the rotation speed of the driving member 20.

[0052] 1 and 2 , in one embodiment of the present application, a drum 10 is provided with a receiving chamber 11, and the driving member 20, the first detection assembly, and the second detection assembly are all accommodated in the receiving chamber 11. In this way, the space occupied by the drum motor 100 can be saved.

[0053] In this embodiment, the drum motor 100 further includes a transmission mechanism 52 and a tensioning mechanism 53 disposed within the accommodating cavity 11. One end of the transmission mechanism 52 is fixedly connected to the front end of the output shaft 21 of the driver 20, and the other end is fixedly connected to the tensioning mechanism 53. In other words, along the axial direction of the drum 10, the tensioning mechanism 53, the transmission mechanism 52, and the driver 20 are sequentially connected, so that the driver 20 can drive the tensioning mechanism 53 to rotate via the transmission mechanism 52.

[0054] A tensioning member is provided on the outer peripheral wall of the tensioning mechanism 53 to abut against the inner wall of the drum 10. A large frictional resistance exists between the tensioning member and the inner wall of the drum 10, so that the tensioning member and the drum 10 remain stationary relative to each other. When the tensioning mechanism 53 rotates, the tensioning member can be used to drive the drum 10 to rotate about the rotation axis L. Specifically, the rotation axis L overlaps with the central axis of the drum 10.

[0055] The transmission mechanism 52 may be a planetary gearbox including a two-stage reduction assembly, which has high transmission efficiency, small size and weight, a compact structure, a small footprint, and low noise. It is understood that in other embodiments of the present application, the planetary gearbox may also include more stages of reduction assemblies according to actual application needs, and this is not a limitation here.

[0056] To facilitate the electrical connection between the first Hall element 32, the second Hall element 42, and the control mechanism 51, please refer to Figures 2 to 4. In one embodiment of the present application, along the axial direction of the drum 10, the first detection component and the second detection component are located on the same side of the driving member 20, reducing the distance between the first Hall PCB board and the second Hall PCB board, facilitating the fixing and installation of the connecting wires, and reducing the possibility of the connecting wires being entangled.

[0057] Specifically, the first detection assembly and the second detection assembly are located on a side of the driving member 20 away from the tensioning mechanism 53 .

[0058] Referring to Figures 1 to 4 , in one embodiment of the present application, the drum motor 100 further includes a driver securing mechanism 54 and a drum support mechanism 55 . The driver securing mechanism 54 is fixedly connected to one end of the driver 20 and extends at least partially outside the accommodating chamber 11 . The driver securing mechanism 54 is used to secure the driver 20 so that the driver 20 is spaced apart from the drum 10, i.e., there is no direct contact between the driver 20 and the drum 10 . The drum support mechanism 55 is located at an end of the drum 10 away from the driver securing mechanism 54 and extends partially outside the accommodating chamber 11 . The drum support mechanism 55 is used to support the drum 10 . This ensures that the driver 20 remains in position within the accommodating chamber 11, while ensuring smooth and stable rotation of the drum 10 .

[0059] In this embodiment, the roller support mechanism 55 includes a support shaft and a connecting sleeve. The connecting sleeve is partially located in the accommodating cavity 11 and has an interference fit with the roller 10, which can realize a fixed connection between the connecting sleeve and the roller 10, so that the connecting sleeve and the roller 10 can rotate synchronously. The support shaft is mainly used to support the roller 10. In actual applications, a roller 10 with output power from a motor is usually connected to multiple unpowered sleeves to achieve a reasonable distribution of power. For example, when the roller 10 rotates around the rotation axis L, since the connecting sleeve is fixedly connected to the roller 10, the connecting sleeve will be driven and start to rotate synchronously. By arranging a belt or other connecting parts on the end of the connecting sleeve away from the roller 10, the unpowered sleeve is driven to rotate synchronously, thereby realizing the transmission of objects.

[0060] In this embodiment, please refer to Figures 3 and 4. The driving member 20 includes a driving housing 22 and a driving body 23. The driving housing 22 is provided with an accommodating space, and the driving body 23 includes an output shaft 21; the driving member fixing mechanism 54 includes a connected support member 541 and a connecting member 542, the support member 541 extends outside the accommodating cavity 11, and the connecting member 542 is accommodated in the accommodating space, and the connecting member 542 and the driving housing 22 are circularly transitioned, that is, the connecting member 542 is fixedly connected to the driving housing 22, and the first Hall element 32 is provided on the side of the connecting member 542 facing the output shaft 21.

[0061] Specifically, the support member 541 is hollow and cylindrical, and the connector 542 is sleeved onto the support member 541. The connector 542 and the support member 541 have an interference fit and are connected in a flat position. Therefore, the connector 542 maintains its position relative to the support member 541 and cannot rotate. The connector 542 and the drive housing 22 form a circular transition fit. The drive housing 22 itself is fixed by the connector 542 and cannot rotate freely. The overall position of the driver 20 is not easily changed, which provides high stability and improves concentricity and reliability.

[0062] The driving principle of the drum motor 100 is as follows: a driver fixing mechanism 54 secures and supports one end of the driver 20. When the driver 20 outputs power, the power is transmitted to the transmission mechanism 52, and the output shaft 21 of the transmission mechanism 52 drives the tensioning mechanism 53 to rotate. Because the tensioning member and the inner wall of the drum 10 generate sufficient friction, the tensioning mechanism 53 drives the drum 10 to rotate. A drum support mechanism 55 is designed at the other end of the drum 10 and is used to connect to the unpowered drum 10 to drive its rotation.

[0063] Referring to Figures 1, 4, and 6, in one embodiment of the present application, the drum motor 100 further includes a positioning member 56 fixedly connected to the connecting member 542, and the first Hall effect element 32 is fixedly connected to the positioning member 56. Thus, the first Hall effect element 32 is fixedly connected to the connecting member 542 via the positioning member 56, and the position of the first Hall effect element 32 is stabilized, thereby preventing detection deviations that may be caused by random movement.

[0064] Specifically, the positioning member 56 includes a connected positioning ring 561 and an extension rod 562. There are multiple extension rods 562, and the extension rods 562 are evenly distributed along the circumference of the positioning ring 561. Each extension rod 562 has a protrusion 563 at one end away from the positioning ring 561. Each protrusion 563 is bent and connected to the corresponding extension rod 562, and each protrusion 563 extends toward the central axis of the positioning ring 561 at the end away from the corresponding extension rod 562. The positioning ring 561, the extension rod 562, and the protrusion 563 can be an integral structure. The positioning ring 561 is supported by the end of the connecting member 542 facing the driving member 20, and the multiple extension rods 562 are located on the outer peripheral wall of the connecting member 542. Furthermore, the outer peripheral wall of the connecting member 542 can be provided with multiple limiting grooves, and each extension rod 562 is retained in a corresponding limiting groove. In this way, the limiting grooves can limit the positioning member 56, preventing the positioning member 56 from rotating relative to the connecting member 542. One side of the protrusion 563 abuts against an end of the connecting member 542 facing away from the driving member 20 , and the other side of the protrusion 563 abuts against the second Hall element 42 .

[0065] Furthermore, the first Hall element 32 is also fixedly connected to the driving body 23, further improving the positional stability of the first Hall element 32. Referring to Figures 4 and 5, the driving body 23 is provided with a connecting rod 24. One end of the connecting rod 24 passes through the first Hall element 32 and is fixedly connected to the first Hall element 32, thereby maintaining the position of the first Hall element 32 relative to the driving body 23. Specifically, a fixing clamp 33 is provided on the side of the first Hall element 32 facing away from the driving body 23. The fixing clamp 33 includes two opposing elastic clips. The end of the connecting rod 24 facing away from the driving body 23 passes through the first Hall element 32 and is clamped between the two elastic clips, facilitating assembly. It will be appreciated that the first PCB board is provided with a through hole for the connecting rod 24 to pass through. The number of through holes and connecting rods 24 can be multiple, and the multiple connecting rods 24 can be evenly distributed along the circumference of the driving body 23, thereby improving the stability of the connection between the first Hall element 32 and the driving body 23.

[0066] Furthermore, the positioning ring 561 has a certain width along the axial direction of the drum 10 to provide sufficient space between the first Hall effect element 32 and the connector 542 for placement of electronic components, the control mechanism 51, etc. It will be appreciated that the extension rod 562 should have a slight deformability to facilitate assembly of the positioning member 56 and the connector 542, thereby improving the assembly efficiency of the drum motor 100.

[0067] In addition, referring to Figure 6, a plurality of connection holes 564 and a plurality of bosses 565 are provided on the ring wall of the positioning ring 561. On the one hand, screws are passed through the first Hall PCB board of the first Hall element 32 and are threadedly connected to the connection holes 564; on the other hand, the plurality of bosses 565 are respectively passed through corresponding through holes on the first Hall PCB board, thereby achieving a fixed connection between the first Hall PCB board and the positioning member 56, with a stable structure and a simple process.

[0068] It is understandable that the connection between the first Hall element 32 and the positioning member 56 is not unique. The connection between the first Hall element 32 and the positioning member 56 can be at least one of a threaded connection, a snap connection, and an adhesive connection, which is not limited here.

[0069] Specifically, the first magnet 31 is a block magnet with its north and south poles located at opposite ends. As the first magnet 31 rotates with the output shaft 21, the magnetic field of the first magnet 31 changes relative to the fixed first Hall element 32, causing a change in the output voltage of the first Hall sensor. It is understood that the shape of the first magnet 31 can be circular or bar-shaped, without limitation.

[0070] Please refer to Figures 1 and 4. In one embodiment of the present application, the second magnet 41 is a ring magnet, the second Hall element 42 and the second magnet 41 are both mounted on the support 541, the second Hall element 42 is spaced apart from the drum 10, and the second magnet 41 is fixedly connected to the inner wall of the drum 10, so that the second magnet 41 and the drum 10 maintain synchronous rotation or stationary state.

[0071] Specifically, the second Hall PCB of the second Hall element 42 is annular and can be fixedly connected to the support member 541 through an interference fit or multiple convex and concave structures. That is, the relative position of the second Hall element 42 and the support member 541 remains unchanged. It can be understood that the relative position of the first Hall element 32 and the second Hall element 42 remains unchanged, and the first Hall element 32 and the second Hall element 42 can be electrically connected via a connecting wire. Because the second Hall element 42 is spaced apart from the drum 10, the rotation of the drum 10 does not affect the position of the second Hall element 42, that is, the second Hall element 42 is always stationary.

[0072] In this embodiment, the magnetization direction of the second magnet 41 is the diameter direction, half of which is the N pole and half is the S pole. Then, when the second magnet 41 rotates around the rotation axis L as the drum 10 rotates, the magnetic field of the second magnet 41 changes relative to the second Hall element 42 at a fixed position, causing the output voltage of the second Hall sensor to change.

[0073] It can be understood that in other embodiments of the present application, the second Hall element 42 and the second magnet 41 can also be arranged outside the drum 10, and the second magnet 41 is fixedly connected to the outer wall of the drum 10, which can also realize real-time detection of the rotation speed of the drum 10, and there is no limitation here.

[0074] Referring to Figures 2 and 4 , in one embodiment of the present application, the drum motor 100 further includes an end cap 60 . The end cap 60 is partially embedded within and fixedly connected to the drum 10 . The end cap 60 defines a mounting channel, through which the support member 541 extends and out of the accommodating cavity 11 . The second magnet 41 is fixedly mounted within the mounting channel. The end cap 60 serves to secure the second magnet 41, facilitating installation of the second detection assembly. Furthermore, the end cap 60 provides a seal to prevent the ingress of impurities into the drum 10 .

[0075] In this embodiment, the end cap 60 includes a stopper 61 disposed within the mounting channel, and the side of the second magnet 41 facing away from the second Hall element 42 abuts against the stopper 61. It will be appreciated that in other embodiments of the present application, the second magnet 41 may also be embedded in the side wall of the end cap 60, but is not limited thereto.

[0076] Specifically, the end cover 60 includes a first main body 62 and a second main body 63 that are detachably connected. The mounting channel passes through the first main body 62, and a mounting hole is provided on the second main body 63. When the first main body 62 and the second main body 63 are docked, the mounting hole is opposite to and connected to the mounting channel. The support member 541 passes through the mounting channel and extends to the outside of the accommodating cavity 11 through the mounting hole. Among them, the stopper 61 is an annular structure protruding from the side wall of the mounting channel, which can fully stop the second magnet 41 and limit the installation position of the second magnet 41. It can be understood that the shape of the stopper 61 is not unique. For example, in other embodiments of the present application, the stopper 61 may also include a plurality of bosses spaced apart on the side wall of the mounting channel, and the plurality of bosses are distributed in a ring shape, but is not limited thereto.

[0077] In order to improve the sealing performance of the end cap 60, the joint between the first body 62 and the second body 63 is matched by multiple convex and concave structures. In this way, after the second body 63 is connected to the first body 62, the possibility of dust and other impurities entering the installation channel or the accommodating cavity 11 through the joint between the first body 62 and the second body 63 can be reduced. Specifically, the multiple convex and concave structures are concentrically arranged. In addition, both the first body 62 and the second body 63 are provided with through holes, and the side walls of the through holes are provided with threads. After the second body 63 is connected to the first body 62, the first body 62 and the second body 63 are fixedly connected by screws that cooperate with the through hole threads.

[0078] In addition, referring to Figures 1 and 4, a flange is provided on the outer peripheral wall of the first body 62. When the end cover 60 is partially embedded in the drum 10, the first body 62 is partially embedded in the drum 10, and the end of the drum 10 abuts against the flange to clamp the first body 62 to the end of the drum 10. In other words, the flange is used to stop the first body 62 and prevent the first body 62 from sliding completely into the drum 10.

[0079] It can be understood that the outer diameter of the first body 62 is greater than the outer diameter of the drive housing 22 .

[0080] It can be understood that the diameter of the installation channel is larger than the size of the support member 541 to avoid contact and friction between the support member 541 and the end cover 60.

[0081] In addition, the support member 541 can be a hollow structure, and the electrical connection lines of the driving member 20, the first detection component and the second detection component can pass through the support member 541 to connect to an external power supply, display screen, etc.

[0082] It is understood that the second magnet 41 may have other structures. For example, in other embodiments of the present application, the second magnet 41 may be a block magnet, fixedly mounted on a mounting ring, and the second Hall element 42 and the mounting ring are both mounted on the support member 541. The second Hall element 42 is spaced apart from the drum 10, and the mounting ring is fixedly connected to the inner wall of the drum 10.

[0083] Specifically, the mounting ring may be retained in a groove on the inner wall of the drum 10 , or the mounting ring may be connected to the inner wall of the drum 10 by screws, but is not limited thereto.

[0084] The above-mentioned drum motor 100 detects the rotational speed of the first magnet 31 and the output shaft 21 through the first Hall element 32, and detects the rotational speed of the second magnet 41 and the drum 10 through the second Hall element 42, thereby detecting the moving distance accuracy of the material box during the transmission process of the drum 10 in real time, thereby improving the control accuracy. That is, the above-mentioned drum motor 100 can simultaneously detect the rotational speed of the driving member 20 and the rotational speed of the drum 10, and combined with the control mechanism, it can improve the control accuracy of the rotational speed of the drum 10, thereby solving the problem of low drum speed control accuracy of the drum motor in the prior art.

[0085] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A drum motor, comprising a drum and a driving member connected to each other, wherein the driving member is used to drive the drum to rotate, characterized in that: The drum motor also includes: A first detection assembly, comprising a first magnet and a first Hall element, wherein the first magnet is fixedly connected to the rear end of the output shaft of the driving member, the roller is fixedly connected to the front end of the output shaft of the driving member, and the first Hall element is used to sense the magnetic field change of the first magnet to detect the rotation speed of the output shaft; The second detection component includes a second magnet and a second Hall element. The second magnet is fixedly connected to the drum. The second Hall element is used to sense the change of the magnetic field of the second magnet to detect the rotation speed of the drum.

2. The drum motor according to claim 1, characterized in that: The drum motor also includes a control mechanism, which is electrically connected to the first Hall element, the second Hall element and the driving member respectively, and the control mechanism is used to receive the detection signal emitted by the first Hall element and the detection signal emitted by the second Hall element, and control the rotation speed of the driving member.

3. The drum motor according to claim 1 or 2, characterized in that: A containing cavity is provided in the drum, and the driving member, the first detection component and the second detection component are all contained in the containing cavity.

4. The drum motor according to claim 3, characterized in that: The drum motor also includes: A driving member fixing mechanism, fixedly connected to one end of the driving member and at least partially extending outside the accommodating cavity, the driving member fixing mechanism is used to fix the driving member so that the driving member and the roller are spaced apart; The roller supporting mechanism is located at one end of the roller away from the driving member fixing mechanism and partially extends outside the accommodating cavity, and the roller supporting mechanism is used to support the roller.

5. The drum motor according to claim 4, characterized in that: The driving member comprises a driving housing and a driving body, wherein a receiving space is provided in the driving housing, and the driving body comprises the output shaft; The driving member fixing mechanism includes a supporting member and a connecting member that are fixedly connected, the supporting member extends outside the accommodating cavity, the connecting member is accommodated in the accommodating space, and the connecting member and the driving housing are in a circular transition fit, and the first Hall element is arranged on a side of the connecting member facing the output shaft.

6. The drum motor according to claim 5, characterized in that: The drum motor further includes a positioning member fixedly connected to the connecting member, and the first Hall element is fixedly connected to the positioning member.

7. The drum motor according to claim 5, characterized in that: The second magnet is a ring magnet. The second Hall element and the second magnet are both sleeved on the support. The second Hall element is spaced apart from the roller. The second magnet is fixedly connected to the inner wall of the roller.

8. The drum motor according to claim 5, characterized in that: The drum motor also includes an end cover, which is partially embedded in the drum and fixedly connected to the drum. The end cover is provided with a mounting channel, the support member passes through the mounting channel and extends outside the accommodating cavity, and the second magnet is fixedly installed in the mounting channel.

9. The drum motor according to claim 8, characterized in that: The end cover includes a stopper portion disposed in the installation channel, and a side of the second magnet facing away from the second Hall element abuts against the stopper portion.

10. The drum motor according to claim 5, characterized in that: The second magnet is a block magnet, the second magnet is fixed on a mounting ring, the second Hall element and the mounting ring are both sleeved on the support, the second Hall element is spaced apart from the roller, and the mounting ring is fixedly connected to the inner wall of the roller.

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