TWI377305B - A protection structure for motor overloading - Google Patents

Description

1377305 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a motor drive and overload protection structure. [Prior Art] [0002] In the prior art, a motor is a main power output component in the mechanical field, and it mainly outputs power through a gear transmission. The rotation of the motor drives the rotation of the gears fixed thereto, and the gears mesh with the output power and are controlled by electronic circuits to control the starting and stopping of the motor operation.

[0003] With the above-mentioned existing transmission mode, when the motor motion is overloaded, although the power supply of the motor supplied by the electronic circuit can be controlled by the electronic circuit to avoid overload damage of the motor, there are still gibbles in this way, such as : Power off • i ν' person; After the electric motor, the motor shaft will continue to rotate due to inertia. In case of large load jam, it will cause the internal components of the motor or the meshing gear to wear. SUMMARY OF THE INVENTION [0004] In view of this, it is necessary to provide a foolish meal.

[0005] A motor overload protection structure, the output shaft, the motor overload protection structure includes: a sleeve sleeve is disposed on the output shaft; a push block is protruded from the output shaft; and two stops are rotatably fixed to the shaft On one end of the sleeve, the tightness of the installation causes a pre-tightening force to block the rotation of the block between the block and the sleeve. The two blocks rotate in opposite directions, respectively comprising two extreme positions: the first position is inverted and cannot be pushed Block contact, the second position is erected to be in contact with the push block; two oppositely disposed on the end face of the sleeve; a connecting rope, both ends of which are fixed around the two stops by two pulleys, and have a suitable length And the elasticity causes the two stops to be in the first position and the second position, respectively. 098137176 Form No. 1010101 Page 3 of 13 0982063718-0 1377305 [0006] The above structure adopts a push block transfer motor fixed to the output shaft of the motor to output power. When overloaded, the connecting rope drives the two blocks to block the motor alternately. Push the block on the output shaft until the motor output shaft stops rotating. With the above structure, the effect of motor overload protection can be achieved, and the structure is simple. [Embodiment]

1 and 2, a perspective view of a motor overload protection structure 100 of the present invention connected to a motor 200 is shown. The motor 200 includes a motor output shaft 210 and a control circuit 220 inside the motor 200. The control circuit 220 is for detecting whether or not the motor is overloaded and controlling the power of the motor 200. A ring-shaped snap ring 211 is protruded from a central portion of the axial surface of the output shaft 210, and a positioning hole 212 is defined in the axial direction near the free end. The latching pin 213 is disposed corresponding to the positioning hole 212.

[0009] 098137176 The motor overload protection structure 100 includes a sleeve 10 sleeved on the motor output shaft 2 10 , a push block 20 fixed to the motor output shaft 210 , and two stops fixedly mounted on the sleeve 10 . 30. Two pulleys 40 and two ends fixed to the stopper 30 -1 - / r ·. r . : , 〇彡, -· - f ......::w ..,, -々V &lt ; . Connecting rope 50. ά ^ ., _\. 夕 '々夕. ; / Please refer to FIG. 3 together, the sleeve 10 inch is mounted on the output shaft 210, and the sleeve 10 is a concentric stepped shaft, including a first connecting shaft 11, a second connecting shaft 12 and an executing shaft 13, wherein The radius of the two connecting shafts 12 is larger than the radius of the first connecting shaft 11 and the executing shaft 13. The shaft shaft 10 is also provided with a circular shaft hole 14 at its axial center position. The sleeve 10 is sleeved on the wheel-out shaft 210 through the shaft hole 14. The snap ring 211 is in surface contact with the first connecting shaft 11, and the pin 213 is snapped into the positioning hole 212 and bent to axially position the sleeve 10. The actuator shaft 13 is coupled to a gear (not shown) for outputting motor power. The end face of the second connecting shaft 12 facing the motor 200 is the connecting face 121, and the connecting face is shown in Form No. A0101 Page 4 of 13 ‘ 0982063718-0

[0010] 1377305

[0012]

The 121 is provided with two square recesses 122 surrounding the first connecting shaft 11, and the square recess 122 is provided with a fixing hole 123 penetrating the circumferential surface of the second connecting shaft 12. The second connecting shaft 12 further includes a rotating shaft 124 corresponding to the fixing hole 123. [0011] The push block 20 has a rectangular shape and can be fixed to the motor output shaft 210 by gluing, welding, bolting or the like. In the present embodiment, the push block 20 is fixed to the motor output shaft 210 - a specific position. When the motor output shaft 210 is mounted on the sleeve 10, the push block 20 at the specific position is parallel to the connecting surface 121 and close to the connecting surface. 121. The stopper 30 has a rectangular shape, and a fixing hole 31 and a chamfer 32 are formed at one end in the longitudinal direction, and a cylindrical boss 33 is protruded at an intermediate position. When the stopper 30 is assembled in the groove 122, the rotating shaft 124 is inserted into the "E1 fixed hole ί^'3 and the fixing holes 31::, J';; the stopper 30 is rotatably fixed to the groove Γ2 Within $, the degree of tightness of the mounting causes a preload force F between the stop 30 and the sleeve 10, i.e., the pawl 30 can be rotated only when the thrust acting on the stop 30 is greater than the preload force F. The stopper 30 includes two extreme positions 丨; for the 俾, the fitting groove 122 is not in surface contact with the push block 20, and the first contact with the push block 20 is in the groove 122. [0013] The two pulleys 40 are disposed in the vertical direction of the connection of the groove 122, and include a rotating shaft 42 and a rotating wheel 41 rotating around the rotating shaft 42. The rotating shaft 42 can be fixed on the connecting surface 121 by gluing, welding, bolting or the like. [0014] The connecting cord 50 is fixed to the boss 33 of a stopper 30, and sequentially passes around the above-mentioned sliding wheel 40, the first rotating shaft 11, and the pulley 40, and is fixed to the other protruding post 33. The connecting rope 50 is a rigid rope, and the length is such that the two stoppers 30 are respectively located at the first position and the second position, so that a stopper 30 is fallen down and inserted into the groove 122. 098137176 Form No. A0101 Page 5 of 13 0982063718-0 1377305 The other stop 30 is erected in the recess 122. [0015] In normal operation, the push block 20 is in surface contact with one of the stops 30, and the other block 30 is retrofitted into the recess 122, and the pre-tightening force F causes the stop 30 in contact with the push block 20 to not fall down. Therefore, the push block 20 is always in contact with each other, so that the motor output shaft 210 rotates to drive the sleeve 10 to rotate.

[0016] When the overload occurs, that is, the sleeve 10 is no longer rotated due to the load, the control circuit 220 controls the power supply to be powered off, and then the motor output shaft 210 is still rotating due to the inertia, and the push block 20 acts on the stop 30 at this time. The force is greater than the preload force F, so that the stopper 30 is caught in the groove 122, the connecting rope 50 drives the other block 30 to slide out of the groove 122, and the motor output shaft 210 rotates to drive the push block 20 and the other block 30. Face contact. The loop is repeated until the motor output shaft 210 stops rotating. The present invention is not limited to the embodiment. For example, the stopper 30 may not be mounted in the recess 122 but formed on the connecting surface 121. There is a fixed frame, and the stopper 3〇 is mounted on the fixed frame: acruc::

BRIEF DESCRIPTION OF THE DRAWINGS [0018] FIG. 1 is an assembled view of an embodiment of a motor overload protection of the present invention, to which a motor is connected. 2 is an exploded view of the embodiment shown in FIG. 1. 3 is an inverted view of the embodiment shown in FIG. 1. [Main component symbol description] [0021] Motor overload protection structure: 100 [0022] Motor: 200 098137176 Form No. A0101 Page 6 of 13 0982063718-0 1377305

[0023] Output shaft: 210 [0024] Control circuit: 2 2 0 [0025] Retaining ring: 211 [0026] Positioning hole: 21 2 [0027] Needle: 213 [0028] Bushing: 1 0 [0029] One connecting shaft: 11 [0030] Second connecting shaft: 12 [0031] Execution pumping: 13 [0032] Connecting surface: 121 [0033] Groove: 122 [0034] Fixing hole: 123 [0035] Shaft: 124 [0036 Push block: 20 [0037] Stop: 30 [0038] Positioning hole: 31 [0039] Chamfer: 32 [0040] Stud: 33 [0041] Runner: 40

098137176 Form No. A0101 Page 7 of 13 0982063718-0 1377305 [0042] Turn: 41 [0043] Shaft: 42 [0044] Connecting Rope 50 : 50

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#d,. Ί . . . .J 'V - 098137176 Form No. A0101 Page 8 of 13 0982063718-0

Claims (1)

1377305 VII. Patent application scope: 1. A motor overload protection structure, the motor includes an output shaft, wherein the motor overload protection structure comprises: a sleeve sleeve rotatably sleeved on the output shaft; The two blocks are rotatably fixed to one end surface of the sleeve, and the degree of tightness of the installation causes a pre-tightening force between the block and the sleeve to block the rotation of the block, and the rotation direction of the two blocks Conversely, there are two extreme positions respectively: the first position is not to be in contact with the push block, and the second position is upright to be in contact with the push block; Two pulleys oppositely disposed on the end surface of the sleeve; and a connection, the two ends are fixed around the two pulleys by the two pulleys, and have the same length and elasticity, so that the two stoppers are respectively in the remaining one Set and second place \ y. The motor overload protection structure of claim 1, wherein the end surface of the sleeve is formed with a groove, the stopper The transition is assembled in the groove of the I. ' ;. 轴 bushing, and the friction between the block and the recess is broken. The preload of today V He . ...>1 1. .. v-y). The motor overload protection structure according to claim 2, wherein the sleeve further comprises a rotating shaft, wherein the stopper and the groove are correspondingly provided with a fixing hole, and the rotating shaft is inserted into the fixing hole so that the stopper is rotatably fixed to the groove Inside. For example, the motor overload protection structure described in claim 3, wherein the block has a rectangular shape, a chamfer is processed at one end of the long direction, and a cylindrical stud is protruded at an intermediate position, wherein the post is used for fixing One end of the connecting rope. The motor overload protection structure of claim 3, further comprising a snap ring protruding from an axial surface of the output shaft. The motor overload protection structure according to claim 4, wherein the sleeve is a concentric stepped shaft, including a first connecting shaft, a second connecting shaft and an executing shaft, wherein the second connecting shaft radius is larger than a radius of the first connecting shaft and the executing shaft, the executing shaft is for connecting the gear output motor power, and the end surface is an end surface of the second connecting shaft facing the motor. 7. The motor overload protection structure according to claim 6, wherein the motor further includes a needle, the shaft axial position is further provided with a circular shaft hole, and the axial surface of the output shaft is close to the free end. A positioning hole is defined in the sleeve, and the sleeve is sleeved on the output shaft through the shaft hole, and the snap ring is in contact with the first connecting shaft surface, and the card pin is bent into the positioning hole and bent, thereby axially positioning the sleeve. The motor load protection structure according to claim 1, wherein the push block is parallel to the connection surface and is in surface contact with the stopper of the second position. ..Ό, V,-·广广" 098137176 Form No. A0101 Page 10 of 13 0982063718-0