Motor with large-torque protection structure

Abstract

The utility model discloses a motor with a large torque protection structure, which comprises a plate box, a main shaft and an auxiliary shaft are rotatably arranged in the plate box, and a transmission mechanism is arranged between the main shaft and the auxiliary shaft to realize structural rotation transmission within a certain torque range. According to the motor with the large-torque protection structure, the detachable transmission fan wheel and the airtight fan wheel are arranged on the surfaces of the main shaft and the auxiliary shaft which are driven by the motor in the plate box, after the positions of the transmission fan wheel and the airtight fan wheel are fixed, a complete gear can be formed to achieve meshing of teeth, then the main shaft can drive the auxiliary shaft to rotate, and the size of the gear between the main shaft and the auxiliary shaft can be replaced; the meshing distance between the gears can be limited according to the load needing to be borne by the auxiliary shaft, the load capable of being borne by the surface of the auxiliary shaft can be limited, after the load is increased, the auxiliary shaft is promoted to slide to be separated from a main shaft transmission structure, then pressure borne when the main shaft and the auxiliary shaft rotate is limited, and large-torque protection is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor with a large torque protection structure. Background Art

[0002] Torque is the force required to drag the load. A high-torque motor protection device is a device that can automatically disconnect the power supply to protect the motor from damage when the load suddenly increases and causes the motor's torque to exceed its tolerance range during startup or operation. This protection is usually essential to prevent motor damage caused by mechanical failure, improper operation or sudden heavy load conditions (such as stalling).

[0003] The reference patent name is: A motor torque overload protection mechanism (patent announcement number: CN215934645U, patent announcement date: 2022-03-01), including a board box, a motor is arranged on the left side wall of the board box, a transmission shaft is arranged at the output end of the motor, the right end of the transmission shaft passes through the right side wall of the inner cavity of the board box, and a transmission mechanism is arranged on the outer wall of the transmission shaft. The new scheme can be coordinated by arranging devices such as a board box, a motor and a transmission shaft, so that the device can easily cut off the power output of the device when an overload occurs, so that the transmission mechanism can idle or slip, which can effectively avoid damage to the transmission mechanism or the power mechanism. By coordinating devices such as a disc brake, a disc brake caliper and a board box, the device can be convenient for braking the driven shaft, which is conducive to quickly braking the driven shaft and avoiding damage to the device due to inertial rotation.

[0004] However, when implementing the above technical scheme, there are the following problems: the above scheme can cut off the power output and brake the load shaft when the surface load of the motor is too large, but in the above scheme, whether the load is too large is directly detected by the overload detector. The overload detector needs to be regularly inspected during daily use, and if the overload detector has a problem, the device is difficult to continue using. Daily maintenance is troublesome and it is difficult to ensure the service life of the torque protection structure. For this reason, the utility model provides a motor with a large torque protection structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an electric motor with a large torque protection structure, which solves the problem that the large torque protection structure of the electric motor directly detects the load through an overload detector to control the structure to cut off power, and the daily maintenance and inspection is cumbersome due to the existence of the overload detector.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: an electric motor with a large torque protection structure, including a plate box, the plate box is internally provided with a main shaft and a secondary shaft, a transmission mechanism is arranged between the main shaft and the secondary shaft to realize the rotation transmission of the structure within a certain range of torque, and the transmission mechanism includes:

[0007] A transmission assembly is arranged between the main shaft and the secondary shaft to realize transmission, including a transmission fan wheel that slides inside the main shaft and the secondary shaft, a closed fan wheel is provided inside the transmission fan wheel for sliding, a fixing assembly is arranged between the transmission fan wheel and the closed fan wheel to realize structural position fixing, and a protection assembly is arranged between the secondary shaft and the box to realize downward movement trajectory limitation;

[0008] The protection component is arranged between the plate box and the secondary shaft to realize torque limitation, and includes protection teeth fixed on the surface of the secondary shaft and inside the plate box. The surface of the secondary shaft is rotatably provided with a secondary block, and a telescopic component is arranged between the secondary block and the plate box to realize structural movement limitation.

[0009] Preferably, the fixing component includes a fixing shaft fixed on the surface of the enclosed impeller and the transmission impeller, a fixing groove is provided on the surface of the main shaft, and a limiting component is arranged between the enclosed impeller and the transmission impeller to realize position limitation.

[0010] Preferably, the limiting assembly includes a limiting shaft and a limiting column that slide inside the closed impeller, a limiting groove is provided on the surface of the transmission impeller, and a limiting spring is fixedly connected between the limiting shafts.

[0011] Preferably, a synchronization rod is slidably provided inside the limiting shaft and the limiting column, and a synchronization groove is provided inside the closed fan wheel.

[0012] Preferably, the telescopic assembly comprises a telescopic rod that slides inside the auxiliary block, and the inside of the box is slidably connected with the telescopic block.

[0013] Preferably, a telescopic slot is provided inside the telescopic block, and a telescopic spring is fixedly connected between the telescopic rod and the telescopic slot.

[0014] Beneficial Effects

[0015] The utility model provides a motor with a large torque protection structure. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The electric motor with a large torque protection structure is provided with a detachable transmission impeller and a closed impeller on the surface of the main shaft and the secondary shaft driven by the motor inside the box. After the positions of the two impellers are fixed, they can form a complete gear to achieve tooth meshing, so that the main shaft can drive the secondary shaft to rotate, and the size of the gears between the two impellers can be replaced. The meshing distance between the gears can be limited according to the load that the secondary shaft needs to bear, and the load that the secondary shaft surface can bear can be limited. When the load increases, the secondary shaft will slide and disengage from the main shaft transmission structure, thereby limiting the pressure borne by the main shaft and the secondary shaft when they rotate, thereby achieving large torque protection.

[0017] (2) The electric motor with a large torque protection structure has a telescopic rod and a telescopic block that can slide between the secondary shaft and the plate box, so that the position of the secondary shaft relative to the main shaft can be limited by friction and a telescopic spring. The telescopic rod and the telescopic block, the secondary block and the plate box, and the closed impeller and the transmission impeller can be fixed in position by limiting grooves and limiting columns. The friction force and the telescopic spring strength between the telescopic rod and the telescopic block can be adjusted according to load requirements to limit the movable distance. The impeller can be disassembled to facilitate the control of the rotation position. The electric motor can be suitable for motors with multiple torque protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural stereogram of the utility model;

[0019] Figure 2 It is a three-dimensional structural cross-sectional view of the secondary shaft of the utility model;

[0020] Figure 3 This is a three-dimensional structural exploded view of the transmission fan wheel of the utility model;

[0021] Figure 4 It is a three-dimensional structural cross-sectional view of the telescopic assembly of the utility model;

[0022] Figure 5 It is a three-dimensional structural exploded view of the limiting component of the utility model.

[0023] In the figure: 1-box, 2-main shaft, 3-secondary shaft, 4-transmission mechanism, 41-transmission fan wheel, 42-enclosed fan wheel, 43-protective tooth, 44-secondary block, 5-fixed component, 51-fixed shaft, 52-fixed groove, 53-limiting component, 531-limiting shaft, 532-limiting column, 533-limiting groove, 534-limiting spring, 535-synchronizing rod, 536-synchronizing groove, 6-telescopic component, 61-telescopic rod, 62-telescopic block, 63-telescopic groove, 64-telescopic spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 , the utility model provides two technical solutions:

[0026] Embodiment 1

[0027] A motor with a large torque protection structure includes a box 1, one end of which is fixedly connected to a three-phase asynchronous motor, a main shaft 2 and a secondary shaft 3 are provided for rotation inside the box 1, a transmission mechanism 4 is provided between the main shaft 2 and the secondary shaft 3 to realize structural rotation transmission within a certain range of torque, and the transmission mechanism 4 includes:

[0028] The transmission component is arranged between the main shaft 2 and the secondary shaft 3 to realize transmission, including a transmission fan wheel 41 that slides inside the main shaft 2 and the secondary shaft 3, and a closed fan wheel 42 is provided inside the transmission fan wheel 41 for sliding. A fixing component 5 is arranged between the transmission fan wheel 41 and the closed fan wheel 42 to realize structural position fixing. A complete gear can be formed between the transmission fan wheel 41 and the closed fan wheel 42. The surface gears of the main shaft 2 and the secondary shaft 3 are meshed with each other. A protection component is arranged between the secondary shaft 3 and the box 1 to realize downward movement trajectory limitation;

[0029] A protection component is arranged between the box 1 and the secondary shaft 3 to realize torque limitation, including a protection tooth 43 fixed on the surface of the secondary shaft 3 and inside the box 1, a secondary block 44 is rotatably arranged on the surface of the secondary shaft 3, and a telescopic component 6 is arranged between the secondary block 44 and the box 1 to realize structural movement limitation;

[0030] A detachable transmission impeller 41 and a sealed impeller 42 are arranged on the surface of the main shaft 2 and the secondary shaft 3 driven by the motor inside the box 1. After the positions of the two are fixed, they can form a complete gear to achieve tooth meshing, so that the main shaft 2 can drive the secondary shaft 3 to rotate, and the size of the gears between the two can be replaced. The meshing distance between the gears can be limited according to the load that the secondary shaft 3 needs to bear, and the load that the surface of the secondary shaft 3 can bear can be limited. When the load increases, the secondary shaft 3 will be prompted to slide and disengage from the transmission structure of the main shaft 2, thereby limiting the pressure borne by the main shaft 2 and the secondary shaft 3 during rotation, thereby achieving high torque protection.

[0031] Embodiment 2

[0032] The main difference from the first embodiment is:

[0033] A motor with a large torque protection structure, wherein the fixing component 5 includes a fixed shaft 51 fixed on the surface of a closed impeller 42 and a transmission impeller 41, a fixing groove 52 is provided on the surface of the main shaft 2, a limiting component 53 is arranged between the closed impeller 42 and the transmission impeller 41 to realize position limitation, the limiting component 53 includes a limiting shaft 531 and a limiting column 532 sliding with the inside of the closed impeller 42, a limiting groove 533 is provided on the surface of the transmission impeller 41, a limiting spring 534 is fixedly connected between the limiting shaft 531, a synchronous rod 535 is provided for sliding inside the limiting shaft 531 and the limiting column 532, a synchronous groove 536 is provided inside the closed impeller 42, a columnar protrusion is provided on the surface of the synchronous rod 535, and the surface of the columnar protrusion is slidably connected to the inner surface of the synchronous groove 536, the telescopic component 6 includes a telescopic rod 61 sliding with the inside of the auxiliary block 44, the inside of the box 1 is slidably connected with the telescopic block 62, and the telescopic The position of the retractable rod 61 and the auxiliary block 44 is fixed on the telescopic block 62 and the box 1 by a limit assembly 53. A telescopic groove 63 is provided inside the telescopic block 62. A telescopic spring 64 is fixedly connected between the telescopic rod 61 and the telescopic groove 63. The surface of the telescopic rod 61 is slidably connected to the inner surface of the telescopic groove 63. A slidable telescopic rod 61 and a telescopic block 62 are arranged between the secondary shaft 3 and the box 1, so that the position of the secondary shaft 3 relative to the main shaft 2 can be limited by friction and the telescopic spring 64. The position of the telescopic rod 61 and the telescopic block 62, the auxiliary block 44 and the box 1 and the closed fan wheel 42 and the transmission fan wheel 41 can be fixed by the limit groove 533 and the limit column 532. The friction force between the telescopic rod 61 and the telescopic block 62 and the strength of the telescopic spring 64 can be adjusted according to the load requirement to limit the movable distance. The fan wheel can be disassembled for easy control of the rotation position, and can be suitable for motors with multiple torque protection requirements.

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] During operation, firstly, according to the required bearing pressure of the surface of the secondary shaft 3, the appropriate telescopic rod 61, telescopic block 62, closed impeller 42 and transmission impeller 41 are installed, and the telescopic rod 61 and telescopic block 62 are slid to the specified positions inside the secondary block 44 and the box 1, and the limit shaft 531 is pressed during the sliding process to make the limit shaft 531 move inward, and the limit shaft 531 will drive the synchronous rod 535 to slide during the movement, and the synchronous rod 535 can drive the limit column 532 to slide downward, and the telescopic rod 61 and telescopic block 62 will be released after sliding to the appropriate position, and the limit shaft 531 will be Under the action of the limit spring 534, the position is restored, and then the limit shaft 531 moves up and contacts the inner surface of the limit groove 533, limiting the position of the telescopic assembly 6 and the auxiliary block 44 and the box 1. When fixing the impeller, first place the impeller at the specified position of the main shaft 2 and the secondary shaft 3 corresponding to the position of the fixed shaft 51 and the fixed groove 52. The fixation between the two is the same as the position fixing operation of the telescopic assembly 6. After the operation is completed, it can be put into use. When the surface load of the secondary shaft 3 reaches a certain amount, the surface teeth of the secondary shaft 3 are disengaged from the surface teeth of the main shaft 2, and no longer drive the secondary shaft 3 to rotate, thereby avoiding damage to the main shaft 2 and the motor caused by the load.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor with a large torque protection structure, comprising a box (1), characterized in that: The plate box (1) is internally provided with a main shaft (2) and a secondary shaft (3) for rotation, and a transmission mechanism (4) is provided between the main shaft (2) and the secondary shaft (3) to realize structural rotation transmission within a certain range of torque, and the transmission mechanism (4) includes: A transmission component is arranged between the main shaft (2) and the secondary shaft (3) to realize transmission, and comprises a transmission impeller (41) that slides inside the main shaft (2) and the secondary shaft (3), a closed impeller (42) is provided inside the transmission impeller (41) for sliding, a fixing component (5) is arranged between the transmission impeller (41) and the closed impeller (42) to realize structural position fixation, and a protection component is arranged between the secondary shaft (3) and the box (1) to realize downward movement trajectory limitation; A protection component is arranged between the plate box (1) and the secondary shaft (3) to achieve torque limitation, and includes protection teeth (43) fixed on the surface of the secondary shaft (3) and inside the plate box (1); a secondary block (44) is rotatably provided on the surface of the secondary shaft (3); and a telescopic component (6) is arranged between the secondary block (44) and the plate box (1) to achieve structural movement limitation.

2. The electric motor with a large torque protection structure according to claim 1, characterized in that: The fixing assembly (5) comprises a fixing shaft (51) fixed on the surface of the enclosed impeller (42) and the transmission impeller (41); a fixing groove (52) is provided on the surface of the main shaft (2); and a limiting assembly (53) is provided between the enclosed impeller (42) and the transmission impeller (41) to achieve position limitation.

3. The electric motor with a large torque protection structure according to claim 2, characterized in that: The limiting assembly (53) comprises a limiting shaft (531) and a limiting column (532) which slide inside the sealed impeller (42); a limiting groove (533) is provided on the surface of the transmission impeller (41); and a limiting spring (534) is fixedly connected between the limiting shaft (531).

4. The electric motor with a large torque protection structure according to claim 3, characterized in that: A synchronization rod (535) is slidably provided inside the limiting shaft (531) and the limiting column (532), and a synchronization groove (536) is provided inside the closed impeller (42).

5. The electric motor with a large torque protection structure according to claim 1, characterized in that: The telescopic assembly (6) comprises a telescopic rod (61) which slides inside the auxiliary block (44), and the interior of the box (1) is slidably connected with a telescopic block (62).

6. The electric motor with a large torque protection structure according to claim 5, characterized in that: A telescopic slot (63) is provided inside the telescopic block (62), and a telescopic spring (64) is fixedly connected between the telescopic rod (61) and the telescopic slot (63).

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