Speed reduction motor with overload protection function

Abstract

The utility model relates to the field of gear motors, in particular to an overload protection gear motor which comprises a motor body, a speed reducer is bolted to the bottom of the motor body, a motor output shaft is bolted to the output end of the motor body, rectangular grooves are formed in the periphery of the surface of the motor output shaft, and air cylinders are bolted to the two sides of the top of an inner cavity of the speed reducer. A connecting ring is bolted to the bottom of the air cylinder, an annular sliding rail is bolted to the bottom of the connecting ring, and a sliding block is slidably connected to the inner side of the rectangular groove. The air cylinder is driven to pull the connecting ring to move upwards, so that the connecting ring drives the driving gear ring to be separated from the driven gear ring through the annular sliding rail and the limiting groove, the driven gear ring loses rotating power, the motor body is synchronously closed, the motor body stops running, and overload power-off protection is carried out on the motor. Therefore, disconnection protection can be carried out on the motor before the motor reaches a set load value, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of reduction motors, in particular to a reduction motor with overload protection. Background Art

[0002] At present, the known reduction motor protection device is composed of a control board and an encoder. The encoder is installed at the tail of the motor, and then the control board identifies the signal read by the encoder to identify the current of the motor. When the current reaches a certain value, the control board will automatically cut off the power supply to protect the motor from damage. However, when the reaction force is frequently applied to the output shaft of the reduction motor, the transmission components will be damaged, and the load on the control board will also increase during the continuous stalling of the motor, which will cause the control board to be damaged.

[0003] After searching, the publication number CN201721429889.0 is a reduction motor with an overload protection device, which specifically discloses a motor body, a motor shaft and a motor gear, wherein the motor body drives the motor shaft to rotate, and further comprises a protection device, wherein the protection device comprises an active member and a driven member, wherein the active member and the driven member are mounted on the motor shaft; the active member is linked with the motor shaft; the driven member is linked with the motor gear; when the motor works normally, the active member and the driven member cooperate and are linked; when the motor works under overload, the active member and the driven member are disengaged from the linkage. The utility model provides a reduction motor with an overload protection device, which adds a protection device between the motor shaft and the motor gear, so that even if a reaction force is frequently loaded on the output end of the reduction motor, the reduction motor will not be damaged, thereby greatly improving the service life of the reduction motor.

[0004] However, the above device still has certain defects. For example, the protection structure requires that the motor is under a very high load state before the disconnection protection mechanism will be triggered. This means that even after the motor is disconnected from the output end, it will still suffer certain damage. After repeated use, the working stability of the motor may decrease, and its practicality needs to be improved.

[0005] Therefore, it is necessary to invent a speed reducer motor with overload protection to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a reduction motor with overload protection, which can effectively solve the above-mentioned technical problem that the protection structure requires that the motor is in a very large load state before the disconnection protection mechanism is triggered. This means that even after the motor is disconnected from the output end, it will still be damaged to a certain extent. After repeated use, the working stability of the motor may be reduced, resulting in low practicality.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a reduction motor with overload protection, comprising a motor body, a reducer bolted to the bottom of the motor body, a motor output shaft bolted to the output end of the motor body, rectangular grooves are provided on all sides of the surface of the motor output shaft, cylinders are bolted to both sides of the top of the reducer inner cavity, a connecting ring is bolted to the bottom of the cylinder, an annular slide rail is bolted to the bottom of the connecting ring, a slider is slidably connected to the inner side of the rectangular groove, a driving gear ring is bolted to the outer side of the slider, a limiting groove is provided on the inner side of the driving gear ring, and the inner side of the limiting groove is rotatably connected to the surface of the annular slide rail, a mounting plate is bolted to the front side of the reducer inner cavity, and the inner side of the mounting plate is rotatably connected to the driving shaft through a bearing, a driven gear ring is bolted to the top of the driving shaft, and the top of the driven gear ring is meshed with the bottom of the driving gear ring, and a first trapezoidal gear is bolted to the bottom of the driving shaft.

[0008] Preferably, the middle part of the front side of the reducer inner cavity is rotatably connected to a first rotating rod through a bearing, a second trapezoidal gear is bolted to the middle part of the surface of the first rotating rod, and the surface of the second trapezoidal gear is meshed with the surface of the first trapezoidal gear. The rotational power of the motor is transmitted to the second trapezoidal gear through the first trapezoidal gear, and synchronously, the second trapezoidal gear will drive the first rotating rod to rotate during the rotation process.

[0009] Preferably, the two sides of the middle part of the reducer inner cavity are rotatably connected with the second rotating rod through bearings, the back side of the second trapezoidal gear is bolted with the first reduction gear, the surface of the second rotating rod is bolted with the second reduction gear, and the surface of the second reduction gear is meshed with the surface of the first reduction gear. When the second trapezoidal gear rotates, the first reduction gear will rotate synchronously with the second trapezoidal gear, thereby driving the second rotating rod to rotate. Since the second reduction gear is meshed with the first reduction gear and the number of gear teeth of the two is equivalent, the first reduction gear drives the second reduction gear to rotate and only serves as a transmission component.

[0010] Preferably, a third rotating rod is rotatably connected to both sides of the reducer inner cavity through bearings, and a third reduction gear is bolted to the surface of the third rotating rod, and the surface of the third reduction gear is meshed with the surface of the second reduction gear, so that the second reduction gear can transfer the rotational kinetic energy generated by the motor output shaft to the third reduction gear during rotation, and reduce the speed through the third reduction gear.

[0011] Preferably, a kinetic energy output shaft is bolted through the reducer on the front side of the third rotating rod, and the rotational kinetic energy of the motor reduced by the third reduction gear is output through the kinetic energy output shaft.

[0012] Preferably, the rear parts of the surfaces of the first rotating rod and the second rotating rod are both arranged and bolted with linked fan blades. When the first rotating rod and the second rotating rod rotate, the linked fan blades will rotate along with them and generate airflow, thereby generating negative pressure inside the reducer, drawing external airflow into the reducer, and dissipating the heat of the gear assembly inside the reducer.

[0013] Preferably, ventilation slots are arranged in the middle of the front and rear sides of the reducer, so that the linked fan blades can draw external air into the reducer through the ventilation slots, and at the same time discharge the air through the ventilation slots, thereby forming a cooling airflow in this reciprocating manner.

[0014] Preferably, a first infrared thermometer is bolted to the left side of the reducer inner cavity, and the temperature of the surface of the third reduction gear is monitored by the first infrared thermometer.

[0015] Preferably, a second infrared thermometer is bolted to the middle of the bottom of the inner cavity of the reducer, and the temperature of the surface of the first reduction gear is monitored by the second infrared thermometer.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] By driving the cylinder, the cylinder pulls the connecting ring upward, and then the connecting ring drives the driving gear ring and the driven gear ring to disengage through the annular slide rail and the limit groove, so that the driven gear ring loses its rotational power, and the motor body is synchronously closed to stop the motor body from running, and the motor is protected from overload power failure, so that the motor can be disconnected before reaching the set load value, thereby increasing the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the overall structure of the utility model;

[0019] Figure 2 It is a front cross-sectional view of the overall structure of the utility model;

[0020] Figure 3 It is a top view of the internal connection structure of the reduction box of the utility model;

[0021] Figure 4 For the utility model Figure 2 A magnified view of the structure at center;

[0022] Figure 5 For the utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0023] Description of reference numerals:

[0024] 1. Motor body; 2. Speed ​​reducer; 3. Motor output shaft; 4. Rectangular groove; 5. Cylinder; 6. Connecting ring; 7. Annular slide rail; 8. Slider; 9. Driving gear ring; 10. Limiting groove; 11. Mounting plate; 12. Driving shaft; 13. Driven gear ring; 14. First trapezoidal gear; 15. First rotating rod; 16. Second trapezoidal gear; 17. Second rotating rod; 18. First reduction gear; 19. Second reduction gear; 20. Third rotating rod; 21. Third reduction gear; 22. Kinetic energy output shaft; 23. Linked fan blades; 24. Ventilation slot; 25. First infrared thermometer; 26. Second infrared thermometer. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-5 The overload protection reduction motor shown in the figure includes a motor body 1, a reducer 2 is bolted to the bottom of the motor body 1, a motor output shaft 3 is bolted to the output end of the motor body 1, rectangular grooves 4 are provided on the four sides of the surface of the motor output shaft 3, cylinders 5 are bolted to both sides of the top of the inner cavity of the reducer 2, a connecting ring 6 is bolted to the bottom of the cylinder 5, an annular slide rail 7 is bolted to the bottom of the connecting ring 6, a slider 8 is slidably connected to the inner side of the rectangular groove 4, a driving gear ring 9 is bolted to the outer side of the slider 8, a limiting groove 10 is provided on the inner side of the driving gear ring 9, and the inner side of the limiting groove 10 is rotatably connected to the surface of the annular slide rail 7, a mounting plate 11 is bolted to the front of the inner cavity of the reducer 2, a driving shaft 12 is rotatably connected to the inner side of the mounting plate 11 through a bearing, a driven gear ring 13 is bolted to the top of the driving shaft 12, and the top of the driven gear ring 13 is meshed with the bottom of the driving gear ring 9, and a first trapezoidal gear 14 is bolted to the bottom of the driving shaft 12.

[0027] The middle part of the front side of the inner cavity of the reducer 2 is rotatably connected with a first rotating rod 15 through a bearing, and the middle part of the surface of the first rotating rod 15 is bolted with a second trapezoidal gear 16, and the surface of the second trapezoidal gear 16 is meshed with the surface of the first trapezoidal gear 14. The rotational power of the motor is transmitted to the second trapezoidal gear 16 through the first trapezoidal gear 14, and synchronously, the second trapezoidal gear 16 will drive the first rotating rod 15 to rotate during the rotation process.

[0028] The second rotating rod 17 is rotatably connected to both sides of the middle part of the inner cavity of the reducer 2 through bearings, the first reduction gear 18 is bolted to the back of the second trapezoidal gear 16, the second reduction gear 19 is bolted to the surface of the second rotating rod 17, and the surface of the second reduction gear 19 is meshed with the surface of the first reduction gear 18. When the second trapezoidal gear 16 rotates, the first reduction gear 18 will rotate synchronously with the second trapezoidal gear 16, thereby driving the second rotating rod 17 to rotate. Since the second reduction gear 19 is meshed with the first reduction gear 18 and the number of gear teeth of the two is equivalent, the first reduction gear 18 drives the second reduction gear 19 to rotate and only serves as a transmission component.

[0029] The third rotating rod 20 is rotatably connected to both sides of the inner cavity of the reducer 2 through bearings, and the surface of the third rotating rod 20 is bolted to the third reduction gear 21, and the surface of the third reduction gear 21 is meshed with the surface of the second reduction gear 19, so that the second reduction gear 19 can transfer the rotational kinetic energy generated by the motor output shaft 3 to the third reduction gear 21 during the rotation process, and reduce the speed through the third reduction gear 21.

[0030] The front side of the third rotating rod 20 passes through the reducer 2 and is bolted with a kinetic energy output shaft 22 . The rotational kinetic energy of the motor decelerated by the third reduction gear 21 is output through the kinetic energy output shaft 22 .

[0031] The rear parts of the surfaces of the first rotating rod 15 and the second rotating rod 17 are both arranged and bolted with linkage blades 23. When the first rotating rod 15 and the second rotating rod 17 rotate, the linkage blades 23 will rotate along with them and generate airflow, thereby generating negative pressure inside the reducer 2, drawing external airflow into the reducer 2, and dissipating heat for the gear components inside the reducer 2.

[0032] Ventilation slots 24 are arranged in the middle of the front and rear sides of the reducer 2, so that the linked fan blades 23 can draw external air into the reducer 2 through the ventilation slots 24, and at the same time discharge the air through the ventilation slots 24, thus forming a cooling airflow.

[0033] A first infrared thermometer 25 is bolted to the left side of the inner cavity of the reducer 2 , and the temperature of the surface of the third reduction gear 21 is monitored by the first infrared thermometer 25 .

[0034] A second infrared thermometer 26 is bolted to the middle of the bottom of the inner cavity of the reducer 2 , and the temperature of the surface of the first reduction gear 18 is monitored by the second infrared thermometer 26 .

[0035] Refer to the instruction manual Figure 1-5Working principle: The motor body 1 is used as the driving source to output the rotational kinetic energy to the reducer 2 through the motor output shaft 3. The cylinder 5 can push the connecting ring 6 to move downward, and the connecting ring 6 pushes the driving gear ring 9 to move downward through the annular slide rail 7 and the limit groove 10. After the reducer 2 receives the rotational power, the motor output shaft 3 will drive the driving gear ring 9 connected to it to rotate rapidly through the rectangular groove 4 and the slider 8. During this process, the annular slide rail 7 will rotate in the limit groove 10, which makes the connecting ring 6 not rotate synchronously with the motor output shaft 3. Due to the push of the cylinder 5, the driving gear ring 9 is in contact with the driven gear ring 13. After the driving gear ring 9 rotates, it drives the driven gear ring 13 to rotate, and then transmits the rotational power to the first trapezoidal gear 1 through the rotating shaft. 4, the first trapezoidal gear 14 transmits the rotational power to the third reduction gear 21 through the second trapezoidal gear 16, the first reduction gear 18, and the second reduction gear 19, and finally outputs the reduced rotational power through the kinetic energy output shaft 22. When the first infrared thermometer 25 or the second infrared thermometer 26 detects that the temperature on the surface of the third reduction gear 21 or the first reduction gear 18 is higher than the set value, the cylinder 5 is immediately driven to pull the connecting ring 6 upward, and then the connecting ring 6 drives the driving gear ring 9 to disengage from the driven gear ring 13 through the annular slide rail 7 and the limit groove 10, so that the driven gear ring 13 loses the rotational power, and the motor body 1 is synchronously closed to stop the motor body 1 from running, and the motor is protected from overload power failure.

[0036] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A speed reducer motor with overload protection, comprising a motor body (1), characterized in that: The motor body (1) is bolted with a reducer (2) at the bottom, the motor body (1) is bolted with a motor output shaft (3) at the output end, the motor output shaft (3) is provided with rectangular grooves (4) on all sides of the surface, the reducer (2) inner cavity top is bolted with a cylinder (5) on both sides, the cylinder (5) is bolted with a connecting ring (6) at the bottom, the connecting ring (6) is bolted with an annular slide rail (7) at the bottom, the inner side of the rectangular groove (4) is slidably connected with a slider (8), the outer side of the slider (8) is bolted with a driving gear ring (9) ), a limiting groove (10) is provided on the inner side of the driving gear ring (9), and the inner side of the limiting groove (10) is rotatably connected to the surface of the annular slide rail (7), a mounting plate (11) is bolted to the front of the inner cavity of the reducer (2), and a driving shaft (12) is rotatably connected to the inner side of the mounting plate (11) through a bearing, a driven gear ring (13) is bolted to the top of the driving shaft (12), and the top of the driven gear ring (13) is meshed with the bottom of the driving gear ring (9), and a first trapezoidal gear (14) is bolted to the bottom of the driving shaft (12).

2. The overload protection reduction motor according to claim 1 is characterized in that: A first rotating rod (15) is rotatably connected to the middle of the front side of the inner cavity of the reducer (2) via a bearing, a second trapezoidal gear (16) is bolted to the middle of the surface of the first rotating rod (15), and the surface of the second trapezoidal gear (16) is meshed with the surface of the first trapezoidal gear (14).

3. The overload protection reduction motor according to claim 2 is characterized in that: A second rotating rod (17) is rotatably connected to both sides of the middle of the inner cavity of the reducer (2) via bearings; a first reduction gear (18) is bolted to the back of the second trapezoidal gear (16); a second reduction gear (19) is bolted to the surface of the second rotating rod (17); and the surface of the second reduction gear (19) is meshed with the surface of the first reduction gear (18).

4. The overload protection reduction motor according to claim 3 is characterized in that: A third rotating rod (20) is rotatably connected to both sides of the inner cavity of the reducer (2) via bearings, a third reduction gear (21) is bolted to the surface of the third rotating rod (20), and the surface of the third reduction gear (21) is meshed with the surface of the second reduction gear (19).

5. The overload protection reduction motor according to claim 4 is characterized in that: The front side of the third rotating rod (20) passes through the reducer (2) and is bolted to a kinetic energy output shaft (22).

6. The overload protection reduction motor according to claim 3 is characterized in that: Linked fan blades (23) are arranged and bolted at the rear of the surfaces of the first rotating rod (15) and the second rotating rod (17).

7. The overload protection reduction motor according to claim 1 is characterized in that: Ventilation slots (24) are arranged in the middle of both the front and rear sides of the reducer (2).

8. The overload protection reduction motor according to claim 1, characterized in that: A first infrared thermometer (25) is bolted to the left side of the inner cavity of the reducer (2).

9. The overload protection reduction motor according to claim 1, characterized in that: A second infrared thermometer (26) is bolted to the middle of the bottom of the inner cavity of the reducer (2).

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