Motor anti-stall transmission

Abstract

The utility model discloses a motor anti -stall's transmission device relates to mechanical drive technical field, motor anti -stall's transmission device includes: input shaft, output shaft, elastic component, input shaft one end is used for with the output end connection of motor, output shaft is coaxial with input shaft arrangement, output shaft one end is used for with load input end connection, elastic component one end with input shaft other end is connected, elastic component other end with output shaft other end separable connection is used for in motor stall with output shaft other end separates to cut off motor with load's connection, through elastic component can after motor stall automatic cut off transmission chain, make motor idling, and can after motor normal rotation automatic recovery transmission chain, need not use friction sliding, can ensure that motor will not appear long -time stall, avoided stall and led to the structure damage or drive loop overheating damage of motor.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a transmission device for preventing motor stall. Background Technology

[0002] Currently, with the continuous development of mechanization, automation and intelligence, the important role of motors in engineering applications is becoming increasingly prominent. When motors encounter complex or abnormal working conditions, their current gradually increases with the increase of load. When the motor stalls, the motor windings or drive circuit may suffer irreversible damage due to excessive current. Therefore, the requirements for motor overcurrent protection design are becoming more diversified.

[0003] In current technology, friction sliding is generally used to prevent motors from stalling for extended periods when they encounter stall conditions. However, friction sliding causes wear on the contact surfaces, which can lead to failure over time. Utility Model Content

[0004] This utility model provides a transmission device for preventing motor stall, which solves the technical problem that existing motor stall prevention methods use friction sliding, which causes wear on the contact surface and is prone to failure over time.

[0005] This utility model embodiment provides a transmission device for preventing motor stall, including: An input shaft, one end of which is used to connect to the output end of the motor; An output shaft is coaxially arranged with the input shaft, and one end of the output shaft is used to connect to the load input terminal; An elastic component, one end of which is connected to the other end of the input shaft, and the other end of which is detachably connected to the other end of the output shaft, is used to separate from the other end of the output shaft when the motor is stalled, thereby cutting off the connection between the motor and the load.

[0006] In some embodiments, the input axis includes: A shaft, one end of which is used to connect to the output end of the motor; A hollow cylinder is disposed at the other end of the shaft, and the elastic component is disposed inside the hollow cylinder.

[0007] In some embodiments, the resilient component includes: An electromagnet is provided at the bottom of the hollow cylinder and at the other end of the shaft, and the electromagnet is connected to the drive circuit of the motor. A spring, which is horizontally disposed inside the hollow cylinder and connected to the electromagnet; A connecting block, which is disposed on the spring and detachably connected to the other end of the output shaft; When the motor stalls, the electromagnet attracts the connecting block and compresses the spring, causing the connecting block to separate from the other end of the output shaft.

[0008] In some embodiments, two cylinders are spaced apart on the end face of the connecting block, and the two cylinders match two holes located at the other end of the output shaft.

[0009] In some embodiments, the connecting block has two rectangular lugs symmetrically arranged on its side, and the two rectangular lugs can slide along two guide grooves provided on the side of the hollow cylinder.

[0010] In some embodiments, the bottom of the hollow cylinder is also provided with bolt holes for connection with the electromagnet.

[0011] In some embodiments, the connecting block is made of a ferromagnetic material.

[0012] In some embodiments, the motor anti-stall transmission device further includes: The lower housing is located outside the input shaft, and a first bearing is provided inside the lower housing. The first bearing is sleeved on the other end of the input shaft. An upper housing is disposed on the lower housing, and a second bearing is provided inside the upper housing. The second bearing is sleeved on the outside of the other end of the output shaft.

[0013] In some embodiments, the motor anti-stall transmission device further includes: The first retaining ring is sleeved between the outer ring of the first bearing and the lower housing; The second retaining ring is sleeved between the inner ring of the first bearing and the other end of the input shaft.

[0014] In some embodiments, the motor anti-stall transmission device further includes: The third retaining ring is sleeved between the outer ring of the second bearing and the upper housing; The fourth retaining ring is fitted between the inner ring of the second bearing and the other end of the output shaft.

[0015] The beneficial effects of the technical solution provided by this utility model include: This utility model provides a transmission device for preventing motor stall, comprising: an input shaft, an output shaft, and an elastic component. One end of the input shaft is connected to the output end of the motor, and the output shaft is coaxially arranged with the input shaft. One end of the output shaft is connected to the load input end. One end of the elastic component is connected to the other end of the input shaft, and the other end of the elastic component is detachably connected to the other end of the output shaft. When the motor stalls, the elastic component can separate from the other end of the output shaft to cut off the connection between the motor and the load. The elastic component can automatically cut off the transmission chain after the motor stalls, allowing the motor to idle, and can automatically restore the transmission chain after the motor rotates normally. Without the need for friction sliding, it can ensure that the motor will not stall for a long time, avoiding structural damage to the motor or overheating damage to the drive circuit caused by stalling. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of a transmission device for preventing motor stall provided in an embodiment of this utility model; Figure 2 An exploded view of a transmission device for preventing motor stall provided in an embodiment of this utility model; Figure 3 A schematic diagram of the external structure of a transmission device for preventing motor stall provided in an embodiment of this utility model; Figure 4 A schematic diagram of the input shaft provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the connecting block provided in an embodiment of the present utility model; Figure label: 1. Input shaft; 11. Shaft body; 12. Hollow cylinder; 121. Guide groove; 122. Bolt hole; 2. Output shaft; 21. Round hole; 3. Elastic component; 31. Electromagnet; 32. Spring; 33. Connecting block; 331. Cylinder; 332. Rectangular lug; 4. Lower housing; 41. First bearing; 5. Upper housing; 51. Second bearing; 6. First retaining ring; 7. Second retaining ring; 8. Third stop ring; 9. Fourth gear ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] This utility model provides a transmission device for preventing motor stall, which solves the technical problem in the related art where existing motor stall prevention methods use friction sliding, which causes wear on the contact surface and is prone to failure over time.

[0020] Figure 1 This utility model provides a transmission device for preventing motor stall, comprising: an input shaft 1, an output shaft 2, and an elastic component 3. One end of the input shaft 1 is connected to the output end of the motor. The output shaft 2 is coaxially arranged with the input shaft 1, and one end of the output shaft 2 is connected to the load input end. One end of the elastic component 3 is connected to the other end of the input shaft 1, and the other end of the elastic component 3 is detachably connected to the other end of the output shaft 2, for separating from the other end of the output shaft 2 when the motor stalls to cut off the connection between the motor and the load.

[0021] This utility model provides a transmission device for preventing motor stall, which includes an input shaft, an output shaft, and an elastic component. One end of the input shaft is connected to the output end of the motor, and the output shaft is coaxial with the input shaft. One end of the output shaft is connected to the load input end, and one end of the elastic component is connected to the other end of the input shaft. The other end of the elastic component is detachably connected to the other end of the output shaft, used to disconnect from the other end of the output shaft when the motor stalls, thereby cutting off the connection between the motor and the load. When the motor is not stalled, the elastic component is connected to the output shaft, and the input shaft, the elastic component, and the output shaft sequentially transmit the rotational motion of the motor to the input end of the load. When the motor stalls... When the motor is stalled, the other end of the elastic component separates from the other end of the output shaft. This elastic component cuts off the transmission chain between the input shaft and the output shaft, further cutting off the connection between the motor and the load, allowing the motor to idle. Once the abnormal stall condition is resolved, the elastic component reconnects to the output shaft, and the entire transmission chain—including the input shaft, the elastic component, and the output shaft—resumes normal operation. The elastic component automatically cuts off the transmission chain after the motor stalls, allowing it to idle, and automatically restores the transmission chain after the motor resumes normal rotation, eliminating the need for frictional sliding. This ensures the motor will not stall for extended periods, preventing structural damage or overheating of the drive circuit caused by stalling.

[0022] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 and Figure 4 As shown, the input shaft 1 includes: a shaft body 11 and a hollow cylinder 12. One end of the shaft body 11 is used to connect to the output end of the motor. The hollow cylinder 12 is located at the other end of the shaft body 11, and the elastic component 3 is provided inside the hollow cylinder 12. The shaft body 11 serves as the starting point of the motor rotational motion transmission chain, used to transmit the rotation of the motor to the output shaft 2 and the load input end. The hollow cylinder 12 provides an installation position for the elastic component 3.

[0023] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 2As shown, the elastic component 3 includes: an electromagnet 31, a spring 32, and a connecting block 33. The electromagnet 31 is located at the bottom of the hollow cylinder 12 and at the other end of the shaft 11. The electromagnet 31 is connected to the drive circuit of the motor. The spring 32 is located horizontally inside the hollow cylinder 12 and is connected to the electromagnet 31. The connecting block 33 is located on the spring 32 and is detachably connected to the other end of the output shaft 2. When the motor stalls, the electromagnet 31 attracts the connecting block 33 and compresses the spring 32, causing the connecting block 33 to separate from the other end of the output shaft 2.

[0024] Specifically, the electromagnet 31 is connected to the drive circuit of the motor to monitor the current in real time. When the motor stalls due to an abnormal condition, the current in the drive circuit increases instantaneously, and the attraction force generated by the electromagnet 31 also increases. The connecting block 33 is compressed by the attraction force and separates from the other end of the output shaft 2, cutting off the transmission chain between the input shaft 1 and the output shaft 2, and further cutting off the connection between the motor and the load, causing the motor to idle. When the abnormal working condition of the motor stalling is eliminated, the current in the drive circuit decreases, and the attraction force generated by the electromagnet 31 also decreases. Under the action of the elastic restoring force of the spring 32, the connecting block 33 reconnects to the output shaft 2, restoring the transmission chain between the input shaft 1 and the output shaft 2.

[0025] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 5 As shown, two cylinders 331 are spaced apart on the end face of the connecting block 33. The two cylinders 331 are matched with two circular holes 21 located at the other end of the output shaft 2. The two cylinders 331 are inserted into the two circular holes 21 on the output shaft 2. Under the compression of the spring 32, the connecting block 33 maintains contact with the two circular holes 21 of the output shaft 2 through the two cylinders 331, forming a mechanical connection to realize the transmission of the rotation of the motor to the output shaft 2 and the load. When the motor stalls due to abnormal conditions, the two cylinders 331 disengage from the two circular holes 21, that is, the connecting block 33 disengages from the other end of the output shaft 2 and separates from the output shaft 2.

[0026] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 and Figure 5As shown, the connecting block 33 has two rectangular lugs 332 symmetrically arranged on its side. The two rectangular lugs 332 can slide along two guide grooves 121 provided on the side of the hollow cylinder 12. The two rectangular lugs 332 protrude from the connecting block 33 and are engaged in the two guide grooves 121. The motor transmits the rotational motion to the shaft 11 and the hollow cylinder 12, so that the connecting block 33 can rotate together with the shaft 11 and the hollow cylinder 12, ensuring that the connecting block 33 rotates synchronously with the motor and the input shaft 1. At the same time, it ensures that the connecting block 33 maintains linear motion when moving axially under the action of the electromagnet 31, ensuring the continuity of the transmission chain, further preventing the connecting block 33 from deviating or shaking during rotation, ensuring transmission accuracy, providing rotational positioning for the connecting block 33, and ensuring that the connecting block 33 is completely synchronized with the input shaft 1 during the transmission rotational motion state.

[0027] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 4 As shown, the bottom of the hollow cylinder 12 is also provided with a bolt hole 122 for connecting with the electromagnet 31. The electromagnet 31 is fixed to the bottom of the hollow cylinder 12 by passing a screw through the electromagnet 31 and the bolt hole 122. The spring 32 and the connecting block 33 are then installed in sequence inside the hollow cylinder 12.

[0028] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 2 and Figure 5 As shown, the connecting block 33 is made of ferromagnetic material. Ferromagnetic material is a type of material with strong magnetism, high magnetic conductivity, and high saturation magnetic induction intensity. When used with the electromagnet 31, it has good magnetic attraction ability, so that the connecting block 33 can be moved by the attraction force of the electromagnet 31. This achieves contactless control of the connection and separation of the connecting block 33 and the output shaft 2, avoiding the problem of wear on the contact surface due to friction and sliding.

[0029] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3As shown, the transmission device for preventing motor stall further includes a lower housing 4 and an upper housing 5. The lower housing 4 is located outside the input shaft 1 and contains a first bearing 41, which is sleeved on the other end of the input shaft 1. The upper housing 5 is located on the lower housing 4 and contains a second bearing 51, which is sleeved on the other end of the output shaft 2. The lower housing 4 serves as the bottom outer shell of the input shaft 1, providing mechanical support and protection for internal components. It provides an installation position for the first bearing 41 and supports the rotation of the input shaft 1. The first bearing 41 ensures smooth rotation of the input shaft 1 and reduces mechanical wear. The upper housing 5 serves as the top outer shell, providing mechanical support and protection for the output shaft 2 and the elastic component 3. It provides an installation position for the second bearing 51 and supports the rotation of the output shaft 2. The second bearing 51 ensures smooth rotation of the output shaft 2 and reduces mechanical wear. The upper housing 5 and the lower housing 4 are fixedly connected by four bolts to form a closed structure, which can effectively prevent dust and moisture from entering.

[0030] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3 As shown, the transmission device for preventing motor stall further includes: a first retaining ring 6 and a second retaining ring 7. The first retaining ring 6 is sleeved between the outer ring of the first bearing 41 and the lower housing 4, and the second retaining ring 7 is sleeved between the inner ring of the first bearing 41 and the other end of the input shaft 1. The first retaining ring 6 is used to keep the first bearing 41 in a fixed position in the lower housing 4, preventing axial displacement, maintaining the stability of the rotation of the input shaft 1, ensuring that the position of the first bearing 41 remains unchanged when the input shaft 1 rotates, reducing rotational errors, and preventing the first bearing 41 from loosening. The input shaft 1 passes through the inner ring of the first bearing 41 from right to left, and is axially clamped to the inner ring of the first bearing 41 through the shoulder in its middle and the second retaining ring 7. The second retaining ring 7 and the first retaining ring 6 work together to fix the position of the first bearing 41 on the lower housing 4 and the input shaft 1, ensuring that the first bearing 41 remains stable in both the axial and radial directions when the input shaft 1 rotates.

[0031] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3As shown, the transmission device for preventing motor stall further includes a third retaining ring 8 and a fourth retaining ring 9. The third retaining ring 8 is sleeved between the outer ring of the second bearing 51 and the upper housing 5, and the fourth retaining ring 9 is sleeved between the inner ring of the second bearing 51 and the other end of the output shaft 2. The third retaining ring 8 is used to keep the second bearing 51 in a fixed position in the upper housing 5, preventing axial displacement, maintaining the stability of the rotation of the output shaft 2, ensuring that the position of the second bearing 51 remains unchanged when the output shaft 2 rotates, reducing rotational errors, and preventing the second bearing 51 from loosening. The output shaft 2 passes through the inner ring of the second bearing 51 from left to right, and is axially clamped to the inner ring of the second bearing 51 by the shoulder in its middle, the fourth retaining ring 9, and the third retaining ring 8. The fourth retaining ring 9 and the third retaining ring 8 work together to fix the position of the second bearing 51 on the upper housing 5 and the output shaft 2, ensuring that the second bearing 51 remains stable in both the axial and radial directions when the output shaft 2 rotates.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A transmission device for preventing motor stalling, characterized in that, include: An input shaft (1) is provided, one end of which is used to connect to the output end of a motor. Output shaft (2), the output shaft (2) is coaxially arranged with the input shaft (1), and one end of the output shaft (2) is used to connect to the load input terminal; The elastic component (3) is connected at one end to the other end of the input shaft (1) and the other end of the elastic component (3) is detachably connected to the other end of the output shaft (2). It is used to separate from the other end of the output shaft (2) when the motor stalls to cut off the connection between the motor and the load.

2. The transmission device for preventing motor stalling according to claim 1, characterized in that, The input shaft (1) includes: Shaft (11), one end of which is used to connect to the output end of the motor; A hollow cylinder (12) is located at the other end of the shaft (11), and the elastic component (3) is provided inside the hollow cylinder (12).

3. The transmission device for preventing motor stalling according to claim 2, characterized in that, The elastic component (3) includes: Electromagnet (31), the electromagnet (31) is located at the bottom of the hollow cylinder (12) and at the other end of the shaft (11), the electromagnet (31) is connected to the drive circuit of the motor; A spring (32) is disposed horizontally inside the hollow cylinder (12) and connected to the electromagnet (31); A connecting block (33) is provided on the spring (32) and can be detachably connected to the other end of the output shaft (2); When the motor stalls, the electromagnet (31) attracts the connecting block (33) and compresses the spring (32), causing the connecting block (33) to separate from the other end of the output shaft (2).

4. The transmission device for preventing motor stalling according to claim 3, characterized in that: Two cylinders (331) are spaced apart on the end face of the connecting block (33), and the two cylinders (331) are matched with two round holes (21) located at the other end of the output shaft (2).

5. The transmission device for preventing motor stalling according to claim 3, characterized in that: The connecting block (33) has two rectangular lugs (332) symmetrically arranged on its side. The two rectangular lugs (332) can slide along the two guide grooves (121) provided on the side of the hollow cylinder (12).

6. The transmission device for preventing motor stalling according to claim 3, characterized in that: The hollow cylinder (12) is also provided with bolt holes (122) at the bottom for connecting with the electromagnet (31).

7. The transmission device for preventing motor stalling according to claim 3, characterized in that: The connecting block (33) is made of ferromagnetic material.

8. The transmission device for preventing motor stalling according to claim 1, characterized in that, Also includes: The lower housing (4) is located outside the input shaft (1), and a first bearing (41) is provided inside the lower housing (4). The first bearing (41) is sleeved on the other end of the input shaft (1). The upper housing (5) is disposed on the lower housing (4), and the upper housing (5) is provided with a second bearing (51), which is sleeved on the other end of the output shaft (2).

9. The transmission device for preventing motor stalling according to claim 8, characterized in that, Also includes: The first retaining ring (6) is sleeved between the outer ring of the first bearing (41) and the lower housing (4); The second retaining ring (7) is sleeved between the inner ring of the first bearing (41) and the other end of the input shaft (1).

10. The transmission device for preventing motor stalling according to claim 8, characterized in that, Also includes: The third retaining ring (8) is sleeved between the outer ring of the second bearing (51) and the upper housing (5); The fourth retaining ring (9) is fitted between the inner ring of the second bearing (51) and the other end of the output shaft (2).

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