Roller motor torque measuring device

Abstract

The utility model provides a roller motor torque measuring device, which belongs to the technical field of roller motor torque measurement and comprises a base for fixing a roller motor and at least one group of torque loading tools arranged on the base. The torque loading tool comprises a shaft sleeve and a pressure sensor; the shaft sleeve is used for fixedly sleeving a central shaft of the roller motor and has a degree of freedom of rotating relative to the base by taking the central shaft as an axis; a force arm rod extending outwards is arranged on the shaft sleeve; the pressure sensor is arranged on the base and is suitable for being connected with the force arm rod; when the outer rotor of the roller motor rotates, the center shaft rotates under the counter-acting force of the electromagnetic force, so that the force arm rod transmits the acting force to the pressure sensor. According to the roller motor torque measuring device provided by the invention, when the outer rotor of the motor rotates, the central shaft rotates under the counter-acting force of the electromagnetic force, and the acting force is transmitted to the pressure sensor through the force arm rod, so that the motor torque can be accurately measured in real time, and the reliability of the measuring result is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of roller motor torque measurement technology, and more specifically, it relates to a roller motor torque measuring device. Background Technology

[0002] A drum motor is a special drive device that highly integrates a motor and a drum's mechanical structure. Its core function is to convert electrical energy into mechanical torque to drive the drum's rotation, and it is widely used in industrial conveying equipment. Its typical structure consists of an internal stator winding, an external permanent magnet rotor, a drum body, support bearings, and a cooling system. It employs an external rotor design to achieve integrated coupling between the drum and the motor rotor. The external rotor is directly fixed to the inner wall of the drum, while the stator is statically supported by a central shaft, forming a unique architecture where the stator is stationary and the rotor and drum rotate synchronously. This design features a compact structure and high transmission efficiency.

[0003] Currently, the industry mainly measures the torque of drum motors through direct measurement. Specifically, dynamic torque sensors or dynamometers are used for physical testing. During measurement, the outer rotor of the motor needs to be rigidly connected to the sensor through a coupling, and torque data is recorded under no-load or simulated load conditions.

[0004] The inventors discovered that the external rotor structure of the drum motor limits the sensor installation space, making it difficult to achieve precise coaxial alignment between the measuring device and the drum's inner cavity. This can easily lead to radial off-center loading, reducing measurement accuracy. Furthermore, disassembly-based measurement would compromise the motor's sealing and affect simulations of actual operating conditions. In addition, the centrifugal deformation and temperature rise of the external rotor at high speeds could further interfere with the stability of the sensor signal, making it difficult for traditional tooling to meet the requirements for high-precision, non-invasive measurement. Utility Model Content

[0005] The purpose of this application is to provide a torque measuring device for a drum motor to solve the technical problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A torque measuring device for a roller motor is provided, comprising a base for fixing the roller motor, and at least one set of torque loading fixtures disposed on the base; the torque loading fixtures include:

[0008] A bushing, for fixedly fitted onto the central shaft of the roller motor, and having a degree of freedom to rotate relative to the base about the central shaft; the bushing has an outwardly extending lever arm; and

[0009] A pressure sensor is mounted on the base and is adapted to be connected to the lever arm.

[0010] When the outer rotor of the drum motor rotates, the central shaft rotates under the reaction force of the electromagnetic force, so that the lever arm transmits the force to the pressure sensor.

[0011] In one possible implementation, the lever arm includes:

[0012] Two transmission plates are arranged side-by-side on the bushing along its axial direction, and both transmission plates extend outward in the same direction along the radial direction of the bushing; and

[0013] A pressure plate is disposed between the two transmission plates and is fixedly connected to the two transmission plates;

[0014] When the central shaft rotates, the pressure plate is adapted to connect with the pressure sensor.

[0015] In one possible implementation, there are also multiple tie rods between the two transmission plates; the axial direction of each tie rod is parallel to the axial direction of the bushing, and both ends of each tie rod are connected to the two transmission plates respectively.

[0016] In one possible implementation, the bushing is connected to each of the transmission plates by a plurality of fixing bolts, and the plurality of fixing bolts are spaced apart circumferentially along the bushing; the axial direction of each fixing bolt is parallel to the axial direction of the bushing.

[0017] In one possible implementation, a limiting member is provided between the lever arm and the base;

[0018] When the outer rotor of the drum motor rotates in the reverse direction, the limiting member is used to restrict the lever arm from swinging in the reverse direction.

[0019] In one possible implementation, the limiting member includes:

[0020] A limiting rod is disposed on the base, and its axis is parallel to the orientation of the pressure sensor; and

[0021] A compression spring is fitted onto the limiting rod;

[0022] The lever arm has a pre-drilled hole for the limiting rod to pass through, and the compression spring is located on the side of the lever arm facing away from the base so that when the lever arm swings in the opposite direction, the compression spring stores elastic energy.

[0023] In one possible implementation, the reserved hole is a strip structure extending along the length of the lever arm, and the limiting rod is slidably inserted into the reserved hole.

[0024] In one possible implementation, the pressure sensor is slidably connected to the base to be adapted to move toward or away from the bushing.

[0025] In one possible implementation, the pressure sensor is driven by a linear drive mechanism, the linear drive mechanism comprising:

[0026] The transmission seat is fixedly mounted on the pressure sensor; and

[0027] A screw is rotatably connected to the base, and the screw is threadedly connected to the transmission seat;

[0028] When the screw rotates, the transmission seat drives the pressure sensor to move synchronously.

[0029] In one possible implementation, the bushing further includes:

[0030] The bearing housing is fixedly mounted on the base.

[0031] The bushing is rotatably connected to the bearing housing.

[0032] In this embodiment, the working steps of the roller motor torque measuring device are as follows: First, the roller motor is fixed on the base to ensure a stable installation. Next, a bushing is fixedly fitted onto the central shaft of the roller motor, giving the bushing the freedom to rotate relative to the base about the central shaft. When the roller motor starts, the outer rotor begins to rotate, and the central shaft rotates under the reaction force of the electromagnetic force. Since the bushing is fixedly connected to the central shaft, it also rotates, and the outwardly extending lever on the bushing moves accordingly. During this movement, the lever connects to a pressure sensor mounted on the base and transmits force to the sensor. After receiving this force, the pressure sensor converts it into recordable and analyzable data such as electrical signals, thereby achieving the measurement of the roller motor torque.

[0033] The roller motor torque measuring device provided in this application has several advantages over existing technologies. Structurally, its design is reasonable and simple. The roller motor is fixed to the base, and the components such as the bushing, lever arm, and pressure sensor of the torque loading fixture cooperate with each other, making installation convenient and reducing manufacturing and usage costs. In terms of measurement performance, it utilizes the electromagnetic reaction force of the central shaft when the outer rotor of the motor rotates to transmit the force to the pressure sensor. This physical principle-based measurement method is scientific and effective, accurately and in real-time reflecting the torque of the roller motor, ensuring the reliability of the measurement results, and allowing operators to promptly grasp the motor's operating status. Furthermore, the device has a certain degree of versatility. At least one set of torque loading fixtures can be flexibly adjusted according to different measurement needs and roller motor specifications, adapting to various types of roller motors and improving the device's applicability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural diagram of a drum motor in the prior art;

[0036] Figure 2 This is a three-dimensional structural schematic diagram of the drum motor torque measuring device provided in the embodiments of this application;

[0037] Figure 3 This is a side view of the drum motor torque measuring device provided in the embodiments of this application;

[0038] Figure 4 This is a top view of the roller motor torque measuring device provided in an embodiment of this application.

[0039] Figure 5 For along Figure 4 Schematic diagram of the cross-sectional structure along line AA;

[0040] Figure 6 for Figure 5 A magnified structural diagram of region I in the middle;

[0041] Figure 7 An exploded view of the torque measuring device for a drum motor provided in an embodiment of this application (some structures are omitted for clarity).

[0042] The following are the labeling elements in the figure:

[0043] 1. Base; 11. Bearing seat; 2. Bushing; 3. Lever arm; 31. Transmission plate; 32. Pressure plate; 321. Strip hole; 4. Pressure sensor; 5. Pull rod; 6. Limiting component; 61. Limiting rod; 62. Compression spring; 7. Linear drive mechanism; 71. Transmission seat; 72. Screw; 8. Fixing bolt; 9. Drum motor; 91. Outer rotor; 92. Central shaft. Detailed Implementation

[0044] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0045] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0046] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0048] It should be noted first that, such as Figure 1As shown, the drum motor 9 is a special drive device that highly integrates the mechanical structure of the motor and the drum. Its core function is to convert electrical energy into mechanical torque to drive the drum to rotate, and it is widely used in industrial conveying equipment. Its typical structure consists of an internal stator winding, an external permanent magnet rotor, a drum body, support bearings, and a heat dissipation system. It adopts an external rotor 91 design to achieve integrated coupling between the drum and the motor rotor. The external rotor 91 is directly fixed to the inner wall of the drum, and the stator is statically supported by the central shaft 92, forming a unique architecture in which the stator is stationary and the rotor and drum rotate synchronously, which has the characteristics of compact structure and high transmission efficiency.

[0049] Please refer to the following: Figures 2 to 7 The torque measuring device for a roller motor provided in this application will now be described. The torque measuring device for a roller motor includes a base 1 for fixing a roller motor 9, and at least one set of torque loading fixtures disposed on the base 1; the torque loading fixtures include a bushing 2 and a pressure sensor 4.

[0050] The bushing 2 is used to fix it on the central shaft 92 of the drum motor 9 and has the degree of freedom to rotate relative to the base 1 with the central shaft 92 as the axis; the bushing 2 has an outwardly extending lever 3.

[0051] The pressure sensor 4 is mounted on the base 1 and is adapted to be connected to the lever arm 3.

[0052] When the outer rotor 91 of the drum motor 9 rotates, the central shaft 92 rotates under the reaction force of the electromagnetic force, so that the lever arm 3 transmits the force to the pressure sensor 4.

[0053] Working principle: The roller motor 9 is fixed on the base 1, and the bushing 2 is fixedly sleeved on the central shaft 92 and can rotate relative to the base 1. The bushing 2 has a lever 3. When the outer rotor 91 of the roller motor 9 rotates, the central shaft 92 rotates under the reaction force of electromagnetic force, which drives the bushing 2 and the lever 3 to rotate. The lever 3 transmits the force to the pressure sensor 4 connected to it, and the torque is calculated by multiplying the force and the lever arm.

[0054] By setting up a base 1 for fixing the roller motor 9 and a torque loading fixture, the above structure enables the bushing 2, lever arm 3 and pressure sensor 4 to cooperate with each other, thereby achieving the purpose of measuring the torque of the roller motor 9 and achieving the technical effect of accurately obtaining motor torque data. This solves the technical problem that traditional methods are difficult to directly and accurately measure the torque of the roller motor 9.

[0055] In this embodiment, the working steps of the roller motor torque measuring device are as follows: First, the roller motor 9 is fixed on the base 1 to ensure stable installation. Next, the bushing 2 is fixedly fitted onto the central shaft 92 of the roller motor 9, giving the bushing 2 the freedom to rotate relative to the base 1 about the central shaft 92. When the roller motor 9 starts, the outer rotor 91 begins to rotate, and the central shaft 92 rotates under the reaction force of the electromagnetic force. Since the bushing 2 is fixedly connected to the central shaft 92, the bushing 2 also rotates, and the lever arm 3 extending outward from the bushing 2 also moves accordingly. During the movement, the lever arm 3 connects to the pressure sensor 4 installed on the base 1 and transmits the force to the pressure sensor 4. After receiving the force, the pressure sensor 4 converts it into recordable and analyzable data such as electrical signals, thereby realizing the measurement of the torque of the roller motor 9.

[0056] Compared with the prior art, the roller motor torque measuring device provided in this application has several advantages. Structurally, its design is reasonable and simple. The roller motor 9 is fixed by the base 1, and the components such as the bushing 2, lever arm 3, and pressure sensor 4 of the torque loading fixture cooperate with each other, making installation convenient and reducing manufacturing and usage costs. In terms of measurement performance, the electromagnetic reaction force of the central shaft 92 when the outer rotor 91 of the motor rotates is used to transmit the force to the pressure sensor 4. This measurement method based on physical principles is scientific and effective, accurately and in real-time reflecting the torque of the roller motor 9, ensuring the reliability of the measurement results and allowing operators to promptly grasp the motor's operating status. Furthermore, the device has a certain degree of versatility. At least one set of torque loading fixtures can be flexibly adjusted according to different measurement needs and the specifications of the roller motor 9, adapting to various types of roller motors 9 and improving the device's applicability.

[0057] In some embodiments, the lever arm 3 described above can be adopted as follows: Figures 2 to 7 The structure shown is described in the following document. Figure 2 and Figure 7 The lever arm 3 includes two transmission plates 31 and a pressure plate 32.

[0058] Two transmission plates 31 are arranged side by side on the bushing 2 along the axial direction of the bushing 2, and both transmission plates 31 extend outward in the same direction along the radial direction of the bushing 2.

[0059] The pressure plate 32 is disposed between the two transmission plates 31 and is fixedly connected to the two transmission plates 31.

[0060] When the central shaft 92 rotates, the pressure plate 32 is adapted to be connected to the pressure sensor 4.

[0061] Two transmission plates 31 are arranged side by side along the axial direction of the bushing 2 and extend radially outward, with a pressure plate 32 fixed between the two transmission plates 31. When the central shaft 92 rotates, the pressure plate 32 connects with the pressure sensor 4, stably transmitting the rotational force of the bushing 2 to the pressure sensor 4.

[0062] By setting up a lever arm 3 consisting of two transmission plates 31 and a pressure plate 32, the above structure enables the transmission plates 31 and the pressure plate 32 to work together to achieve a more stable transmission of force to the pressure sensor 4, thereby improving the stability and accuracy of torque measurement and solving the technical problem of unstable force transmission by the lever arm 3.

[0063] In some embodiments, the transmission plate 31 may be as follows: Figures 2 to 7 The structure shown is described in the following document. Figures 2 to 7 There are also multiple tie rods 5 between the two transmission plates 31; the axial direction of each tie rod 5 is parallel to the axial direction of the bushing 2, and both ends of each tie rod 5 are connected to the two transmission plates 31 respectively.

[0064] Each tie rod 5 is parallel to the axis of the bushing 2, and its two ends are connected to two transmission plates 31 respectively. When the lever arm 3 is under force, the tie rod 5 plays a reinforcing role to prevent the transmission plates 31 from being displaced or deformed.

[0065] By setting multiple tie rods 5 to connect the two transmission plates 31, the above structure can enhance the connection strength between the two transmission plates 31, thereby achieving the purpose of improving the overall structural stability of the lever arm 3. This ensures the reliable operation of the lever arm 3 during torque measurement and solves the technical problem of possible structural deformation of the lever arm 3 during force transmission.

[0066] In some embodiments, the bushing 2 may be adopted as follows: Figure 2 , Figure 4 and Figure 7 The structure shown is described in the following document. Figure 2 , Figure 4 and Figure 7 Each bushing 2 is connected to each transmission plate 31 by a plurality of fixing bolts 8, and the plurality of fixing bolts 8 are spaced apart along the circumference of the bushing 2; the axial direction of each fixing bolt 8 is parallel to the axial direction of the bushing 2.

[0067] Multiple fixing bolts 8 tightly fix the bushing 2 and the transmission plate 31 together. When the bushing 2 rotates with the central shaft 92, the transmission plate 31 can rotate synchronously through the connection of the fixing bolts 8, accurately transmitting torque.

[0068] By setting multiple fixing bolts 8 that are spaced apart along the circumference of the bushing 2 and parallel to the axial direction of the bushing 2 to connect the bushing 2 and the transmission plate 31, the above structure can firmly connect the bushing 2 and the transmission plate 31, and realize the purpose of reliably driving the transmission plate 31 to rotate when the bushing 2 rotates, thereby achieving the technical effect of accurately transmitting torque and solving the technical problem of inaccurate torque transmission caused by the loose connection between the bushing 2 and the transmission plate 31.

[0069] In some embodiments, the lever arm 3 described above can be adopted as follows: Figures 2 to 6 The structure shown is described in the following document. Figures 2 to 6 A limiting member 6 is provided between the lever arm 3 and the base 1; wherein, when the outer rotor 91 of the drum motor 9 rotates in the reverse direction, the limiting member 6 is used to limit the reverse swing of the lever arm 3.

[0070] When the outer rotor 91 of the drum motor 9 rotates in the opposite direction and the lever arm 3 has a tendency to swing in the opposite direction, the limiting component 6 plays a role in limiting the swing amplitude of the lever arm 3.

[0071] By setting a limiting component 6 between the lever arm 3 and the base 1, the above structure can limit the lever arm 3 when the outer rotor 91 of the drum motor 9 rotates in the reverse direction, thereby preventing the lever arm 3 from swinging excessively in the reverse direction. This achieves the technical effect of protecting the device components and ensuring the safety and reliability of the measurement process, and solves the technical problem that the reverse swing of the lever arm 3 may damage the device.

[0072] In some embodiments, the limiting member 6 may be as follows: Figures 2 to 6 The structure shown is described in the following document. Figures 2 to 6 The limiting component 6 includes a limiting rod 61 and a compression spring 62.

[0073] The limiting rod 61 is mounted on the base 1, and its axis is parallel to the orientation of the pressure sensor 4.

[0074] Compression spring 62 is fitted onto limit rod 61.

[0075] The lever arm 3 has a reserved hole suitable for the limit rod 61 to pass through, and the compression spring 62 is located on the side of the lever arm 3 facing away from the base 1, so that when the lever arm 3 swings in the opposite direction, the compression spring 62 will generate elastic energy.

[0076] A limiting rod 61 is mounted on the base 1, and a compression spring 62 is sleeved on the limiting rod 61 and located on the side of the lever arm 3 facing away from the base 1. The lever arm 3 has a reserved hole for the limiting rod 61 to pass through. When the lever arm 3 swings in the opposite direction, the compression spring 62 is compressed, elastic energy is stored, and the impact force is buffered.

[0077] By setting a limiting component 6 consisting of a limiting rod 61 and a compression spring 62, the above structure can make the compression spring 62 elastically store energy when the lever arm 3 swings in the opposite direction, thereby achieving the purpose of buffering the impact force of the lever arm 3 swinging in the opposite direction. This achieves the technical effect of further protecting the device and extending its service life, and solves the technical problem that the lever arm 3 is easily damaged by the large impact force of the reverse swing.

[0078] In some embodiments, the aforementioned reserved hole can be adopted as follows: Figure 6 and Figure 7 The structure shown is described in the following document. Figure 6 and Figure 7 The reserved hole adopts a strip structure that extends along the length of the lever arm 3, and the limiting rod 61 is slidably inserted into the reserved hole.

[0079] When the lever arm 3 swings, the limiting rod 61 slides in the strip-shaped reserved hole, which not only restricts the swing of the lever arm 3, but also adapts to the movement of the lever arm 3 to a certain extent, avoiding damage to the device due to rigid restriction.

[0080] By setting the reserved hole as a strip structure extending along the length of the lever arm 3, the above structure enables the limiting rod 61 to slide within the reserved hole, thereby achieving the purpose of adapting to the swing of the lever arm 3 within a certain range. This achieves a more flexible technical effect of limiting the swing of the lever arm 3 and solves the technical problem that the overly rigid limiting method may affect the normal operation of the device.

[0081] In some embodiments, the pressure sensor 4 described above can be as follows: Figure 2 , Figure 5 and Figure 7 The structure shown is described in the following document. Figure 2 , Figure 5 and Figure 7 The pressure sensor 4 is slidably connected to the base 1 to be adapted to move toward or away from the bushing 2.

[0082] The pressure sensor 4 can slide on the base 1. By moving the position of the pressure sensor 4, it can better cooperate with the lever arm 3 to meet the measurement requirements under different conditions. Since torque is equal to force multiplied by lever arm length, when the distance between the pressure sensor 4 and the bushing 2 increases, the effective length of the lever arm 3 can be increased, thereby reducing the pressure value measured at the pressure sensor 4. When the distance between the pressure sensor 4 and the bushing 2 decreases, the effective length of the lever arm 3 can be reduced, thereby increasing the pressure value measured at the pressure sensor 4. Therefore, by changing the distance between the pressure sensor 4 and the bushing 2, one pressure sensor 4 can be used to adapt to the torque measurement of different specifications of the drum motor 9. The torque value of the drum motor 9 can be obtained by simply converting the ratio of the distance between the pressure sensor 4 and the bushing 2 to the diameter of the outer rotor 91 of the drum motor 9.

[0083] By setting the pressure sensor 4 to slide on the base 1, the above structure allows the pressure sensor 4 to move toward or away from the bushing 2, thereby achieving the purpose of adjusting the position of the pressure sensor 4 according to different measurement requirements. This improves the versatility and applicability of the device and solves the technical problem that the device cannot adapt to the measurement of different specifications of drum motors 9.

[0084] In some embodiments, the linear drive mechanism 7 described above may employ, for example... Figure 2 , Figure 5 and Figure 7 The structure shown is described in the following document. Figure 2 , Figure 5 and Figure 7 The pressure sensor 4 is connected to a linear drive mechanism 7, which includes a transmission base 71 and a screw 72.

[0085] The transmission seat 71 is fixedly mounted on the pressure sensor 4.

[0086] The screw 72 is rotatably connected to the base 1, and the screw 72 is threadedly connected to the transmission seat 71.

[0087] When the screw 72 rotates, the transmission seat 71 drives the pressure sensor 4 to move synchronously.

[0088] The transmission seat 71 is fixed to the pressure sensor 4, and the screw 72 is rotatably connected to the base 1 and threadedly connected to the transmission seat 71. When the screw 72 rotates, according to the principle of threaded transmission, the transmission seat 71 drives the pressure sensor 4 to move axially along the screw 72.

[0089] By setting up a linear drive mechanism 7 consisting of a transmission seat 71 and a screw 72, the above structure enables the transmission seat 71 and the pressure sensor 4 to move synchronously when the screw 72 rotates, thereby achieving the purpose of accurately controlling the position of the pressure sensor 4, thus achieving the technical effect of improving measurement accuracy and operational convenience, and solving the technical problem of inaccurate adjustment of the position of the pressure sensor 4.

[0090] In some embodiments, the bushing 2 may be adopted as follows: Figures 2 to 7 The structure shown is described in the following document. Figures 2 to 7 The bushing 2 also includes a bearing housing 11.

[0091] The bearing housing 11 is fixedly mounted on the base 1, and the bushing 2 is rotatably connected to the bearing housing 11. By utilizing the structural characteristics of the bearing housing 11, the friction force when the bushing 2 rotates is reduced, so that the bushing 2 can rotate more flexibly with the central shaft 92.

[0092] By setting a bearing seat 11 and rotatably connecting the bushing 2 to the bearing seat 11, the above structure enables the bushing 2 to rotate more smoothly relative to the base 1, thereby reducing the rotational resistance of the bushing 2 and achieving the technical effect of improving the accuracy of torque measurement. This solves the technical problem that the bushing 2's unsmooth rotation affects the measurement results.

[0093] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A drum motor torque measuring device, characterized in that, The device comprises a base for fixing a roller motor, and at least one set of torque loading tools arranged on the base; The torque loading tools comprise: a shaft sleeve for fixing and sleeving a central shaft of the roller motor, and having a rotational freedom relative to the base about the central shaft; the shaft sleeve has a force arm rod extending outward therefrom; and a pressure sensor arranged on the base and adapted to be in contact with the force arm rod; wherein, when an outer rotor of the roller motor rotates, the central shaft rotates under the reaction force of electromagnetic force to make the force arm rod transmit a force to the pressure sensor.

2. The drum motor torque measuring device of claim 1, wherein, The force arm rod comprises: two transmission plates arranged on the shaft sleeve in parallel along the axial direction of the shaft sleeve, and both of the two transmission plates extend outward in the same direction along the radial direction of the shaft sleeve; and a pressing plate arranged between the two transmission plates and fixedly connected with the two transmission plates; wherein, when the central shaft rotates, the pressing plate is adapted to be in contact with the pressure sensor.

3. The drum motor torque measuring device of claim 2, wherein, A plurality of pull rods are further arranged between the two transmission plates; the axial direction of each of the pull rods is parallel to the axial direction of the shaft sleeve, and both ends of each of the pull rods are connected with the two transmission plates, respectively.

4. The drum motor torque measuring device of claim 2, wherein, The shaft sleeve and each of the transmission plates are connected through a plurality of fixing bolts, and the plurality of fixing bolts are arranged in the circumferential direction of the shaft sleeve; the axial direction of each of the fixing bolts is parallel to the axial direction of the shaft sleeve.

5. The drum motor torque measuring device of any one of claims 1-4, wherein, The force arm rod and the base are provided with a limiting member; wherein, when the outer rotor of the roller motor reversely rotates, the limiting member is used for limiting the force arm rod from reversely swinging.

6. The drum motor torque measuring device of claim 5, wherein, The limiting member comprises: a limiting rod arranged on the base and having an axial direction parallel to the direction of the pressure sensor; and a compression spring sleeved on the limiting rod; wherein, a reserved hole is formed on the force arm rod and adapted for the limiting rod to pass through, and the compression spring is arranged on the side of the force arm rod away from the base, so that when the force arm rod reversely swings, the compression spring is elastically charged.

7. The drum motor torque measuring device of claim 6, wherein, The reserved hole adopts a strip structure extending along the length direction of the force arm rod, and the limiting rod is slidingly inserted into the reserved hole.

8. The drum motor torque measuring device of claim 1, wherein, The pressure sensor is slidingly connected to the base to be adapted to move towards or away from the shaft sleeve.

9. The drum motor torque measuring device of claim 8, wherein, The pressure sensor is drivingly connected with a linear driving mechanism, and the linear driving mechanism comprises: a transmission seat fixedly arranged on the pressure sensor; and a screw rod rotationally connected to the base and threadedly connected with the transmission seat; wherein, when the screw rod rotates, the transmission seat drives the pressure sensor to synchronously move.

10. The drum motor torque measuring device of claim 1, wherein, The shaft sleeve further comprises: a bearing seat fixedly arranged on the base; wherein, the shaft sleeve is rotationally connected to the bearing seat.

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