CN210599933U - Permanent magnet type load torque overload protection device - Google Patents
Permanent magnet type load torque overload protection device Download PDFInfo
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- CN210599933U CN210599933U CN201920997769.3U CN201920997769U CN210599933U CN 210599933 U CN210599933 U CN 210599933U CN 201920997769 U CN201920997769 U CN 201920997769U CN 210599933 U CN210599933 U CN 210599933U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 230000001012 protector Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
A permanent magnet type overload protection device for load torque comprises an input disc (10) connected with power equipment and an output disc (3) connected with the load equipment, wherein a disc-shaped first magnetic steel (4) is fixedly connected to the output disc, a disc-shaped second magnetic steel (7) is fixedly connected to the input disc, the second magnetic steel and the first magnetic steel attract each other, a threaded sleeve (9) is screwed on the output disc, a flange (14) extends from the right end of the input disc along the radial direction, and a screw (8) is screwed on the wall of the right end of the threaded sleeve. The magnetic torque transmission device is characterized in that torque is transmitted between the second magnetic steel and the first magnetic steel through magnetic force, the input shaft and the output shaft rotate synchronously, when the overload of load torque is larger than the magnetic torque, the rotating speed of the output shaft is lower than that of the input shaft, the distance between the second magnetic steel and the first magnetic steel is gradually increased, the magnetic torque is gradually reduced, related parts connected to the output shaft and the input shaft are protected, the distance between the second magnetic steel and the first magnetic steel can be changed by rotating the threaded sleeve, and the magnetic torque is conveniently set.
Description
Technical Field
The invention relates to a permanent magnet type load torque overload protection device, which is used for enabling an output shaft to output no torque when the load torque is overloaded.
Background
The existing load torque overload protection device structurally comprises an input shaft and an output shaft, wherein the input shaft is connected with power equipment, the output shaft is connected with load equipment, the input shaft drives the output shaft through a friction element, and when the load torque is overlarge, the friction element slips and the output shaft stops rotating; the friction element has the disadvantages that the friction element can generate friction when slipping, and the friction element is easy to damage during friction, so that the service life is reduced; therefore, torque is transmitted by a magnetic coupling scheme to overcome the defects of a friction element, but when the load torque is too large, the magnetic torque is increased, so that load equipment and power equipment cannot be effectively protected, and in addition, the adjustment structure of the magnetic torque is complex and inconvenient to use.
Disclosure of Invention
The invention aims to solve the technical problem of providing a permanent magnet type overload protection device for load torque, wherein the magnetic torque transferred to an output shaft by an input shaft can be automatically reduced when the overload occurs so as to protect power equipment and load equipment, and the adjustment of the magnetic torque is convenient.
The technical scheme of the invention is that the permanent magnet type overload protection device for load torque comprises an input shaft 11 connected with power equipment and an output shaft 1 connected with the load equipment, wherein an output disc 3 extends out of the right end of the output shaft along the radial direction, a disc-shaped first magnetic steel 4 is fixedly connected on the output disc, an input disc 10 extends out of the left end of the input shaft along the radial direction, a disc-shaped second magnetic steel 7 is fixedly connected on the input disc, the diameter of the input disc is smaller than that of the output disc, the diameter of the second magnetic steel is smaller than that of the input disc, the diameter of the second magnetic steel is equal to that of the first magnetic steel, the second magnetic steel and the first magnetic steel attract each other, a threaded sleeve 9 is screwed on the output disc, a flange 14 extends out of the right end of the input disc along the radial direction, the right end of the threaded sleeve can abut against the flange, a screw 8 is screwed on the wall of the threaded sleeve, and the screw can be attached to the excircle of the input disc.
The principle of the permanent magnet type load torque overload protection device is that the second magnetic steel and the input shaft can be regarded as a whole, the first magnetic steel and the output shaft can be regarded as a whole, torque is transmitted between the second magnetic steel and the first magnetic steel through magnetic force, the input shaft and the output shaft can synchronously rotate, when the load torque overload is larger than the magnetic torque, the rotating speed of the output shaft is lower than that of the input shaft, the threaded sleeve is fixed on the input disc through a screw, relative rotation occurs between the threaded sleeve and the output disc, the distance between the second magnetic steel and the first magnetic steel is gradually increased, and the magnetic torque is gradually reduced.
The magnetic torque setting method is that the distance between the second magnetic steel and the first magnetic steel can be changed by rotating the threaded sleeve, the smaller the distance between the second magnetic steel and the first magnetic steel is, the larger the magnetic torque is, and vice versa, and when the distance between the second magnetic steel and the first magnetic steel is adjusted to a proper position, the screw is screwed down.
Compared with the prior art, the torque protection device has the advantages that 1, torque is transmitted between the output shaft and the input shaft through magnetic coupling, a friction element is omitted, and the condition that the friction element is damaged to influence the operation of the torque protection device is avoided; 2. when the overload occurs, the magnetic torque between the output shaft and the input shaft can be automatically reduced, and the related parts connected to the output shaft and the input shaft are protected; 3. the setting of the magnetic torque is convenient.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a right side view of fig. 1.
The reference symbols respectively denote:
1-output shaft, 2-bolt, 3-output disc, 4-first magnetic steel, 5-first annular plate, 6-second annular plate, 7-second magnetic steel, 8-screw, 9-thread sleeve, 10-input disc, 11-input shaft, 12-main shaft of load equipment, 13-shaft body, 14-flange, 15-key pin and 16-main shaft of power equipment.
Detailed Description
Specific embodiments of the present invention will now be described with reference to the accompanying drawings.
A permanent magnet type overload protection device for load torque comprises an input shaft 11 connected with power equipment and an output shaft 1 connected with the load equipment, wherein the right end of the output shaft radially extends out of an output disc 3, the output disc is connected with a disc-shaped first magnetic steel 4 through a bolt 2 and a nut, the flange end of the bolt is sunk in the first magnetic steel, the left end of the input shaft radially extends out of an input disc 10, the input disc is connected with a disc-shaped second magnetic steel 7 through a bolt 2 and a nut, the flange end of the bolt is sunk in the second magnetic steel, the diameter of the input disc is smaller than that of the output disc, the diameter of the second magnetic steel is smaller than that of the input disc, the diameter of the second magnetic steel is equal to that of the first magnetic steel, the second magnetic steel and the first magnetic steel attract each other, the bolts are symmetrically arranged in 3-6 numbers, a thread sleeve 9 is screwed on the output disc, and a flange 14 radially extends out of the right, the right end of the threaded sleeve can abut against the flange to prevent the input disc from automatically moving leftwards, the screw 8 is screwed on the wall of the threaded sleeve, the threaded sleeve can be fixed on the excircle of the input disc by rotating the screw, and 3-6 screws are symmetrically arranged on the threaded sleeve.
The output disc extends to the right to form a ring body, the first magnetic steel is arranged in the ring body of the output disc, the input disc extends to the left to form a ring body, the second magnetic steel is arranged in the ring body of the input disc, the thread is sleeved on the ring body of the output disc, and the screw enables the thread to be fixed on the ring body of the input disc, so that the weight of the output disc and the input disc can be reduced.
First magnet steel left end face on be equipped with annular concave part, the outer fringe position of first magnet steel is the N utmost point, the central point of first magnet steel is the S utmost point, be equipped with first annular plate 5 in the concave part, be equipped with the hole that can let the bolt pass on the terminal surface of first annular plate, can make first magnet steel atress even like this, also be equipped with annular concave part on the second magnet steel right-hand member face, the outer fringe position of second magnet steel is the S utmost point, the central point of second magnet steel is the N utmost point, be equipped with second annular plate 6 in the concave part, be equipped with the hole that can let the bolt pass on the terminal surface of second annular plate. The first and second annular plates are made of a non-magnetically permeable stainless steel material. The magnetic line paths of the first magnetic steel and the second magnetic steel are shown by dotted lines in fig. 1, and the magnetic resistance of the magnetic line paths in the first magnetic steel and the second magnetic steel is low, so that the magnetic leakage can be reduced, and the magnetic field energy can be fully utilized.
And a shaft body 13 extends leftwards from the central part of the input disc, penetrates through the second magnetic steel and the first magnetic steel to enter a hole of the output shaft, and is matched with the hole of the output shaft. This ensures concentricity of the input and output discs.
The main shaft 16 of the power equipment can be inserted into the hole of the input shaft, a key pin 15 is arranged between the hole of the input shaft and the main shaft of the power equipment, and the input shaft and the main shaft of the power equipment can move relatively along the axial direction; the main shaft 12 of the load device can be inserted into the hole of the output shaft, a key pin is arranged between the main shaft of the load device and the output shaft, and the main shaft of the load device can also be fixedly connected with the output shaft by other methods.
Of course, the output end of the power equipment can be sleeved on the input shaft, and the output end of the power equipment and the input shaft can move relatively along the axial direction.
The principle of the permanent magnet type overload protection device for load torque is that the second magnetic steel and the input shaft can be regarded as a whole, the first magnetic steel and the output shaft can be regarded as a whole, torque is transmitted between the second magnetic steel and the first magnetic steel through magnetic force, the input shaft and the output shaft synchronously rotate, when the overload of the load torque is larger than the magnetic torque, the rotating speed of the output shaft is lower than that of the input shaft, the threaded sleeve is fixed on the input disc through a screw, relative rotation is generated between the threaded sleeve and the output disc, the distance between the second magnetic steel and the first magnetic steel is gradually increased, and the magnetic torque is gradually reduced; the load equipment and the power equipment can be reliably protected. If the input shaft continues to rotate, the threaded sleeve will disengage from the output disc.
The magnetic torque setting method is that the distance between the second magnetic steel and the first magnetic steel can be changed by rotating the threaded sleeve, the smaller the distance between the second magnetic steel and the first magnetic steel is, the larger the magnetic torque is, and vice versa, and when the distance between the second magnetic steel and the first magnetic steel is adjusted to a proper position, the screw is screwed down. When the thread bush is separated from the output disc, the screw is loosened, and the thread bush can be screwed on the output disc again by rotating the thread bush because the lower magnetic field attraction force still exists between the second magnetic steel and the first magnetic steel.
It should be noted that the invention is suitable for the occasions of unidirectional rotation, such as when the input shaft rotates reversely, the invention can not play the role of load torque overload protection.
Claims (3)
1. A permanent magnet type overload protection device for load torque comprises an input shaft (11) connected with power equipment and an output shaft (1) connected with the load equipment, wherein the right end of the output shaft radially extends out of an output disc (3), the output disc is fixedly connected with a disc-shaped first magnetic steel (4), the left end of the input shaft radially extends out of an input disc (10), the input disc is fixedly connected with a disc-shaped second magnetic steel (7), the overload protection device is characterized in that the diameter of the input disc is smaller than that of the output disc, the diameter of the second magnetic steel is smaller than that of the input disc, the diameter of the second magnetic steel is equal to that of the first magnetic steel, the second magnetic steel and the first magnetic steel attract each other, a threaded sleeve (9) is screwed on the output disc, a flange (14) radially extends out of the right end of the input disc, the right end of the threaded sleeve can abut against the flange, a screw (, the screw can paste with the excircle of input dish mutually.
2. The permanent magnet overload torque protector according to claim 1, wherein the first magnetic steel has an annular recess on its left end face, the first magnetic steel has an N-pole at its outer edge, an S-pole at its center, and an annular recess on its right end face, the second magnetic steel has an S-pole at its outer edge and an N-pole at its center.
3. A permanent magnet type overload torque protector according to claim 1 or 2, wherein a shaft body (13) extends leftwards from the central part of the input disc, passes through the second magnetic steel and the first magnetic steel and enters the hole of the output shaft, and the shaft body is matched with the hole of the output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920997769.3U CN210599933U (en) | 2019-06-29 | 2019-06-29 | Permanent magnet type load torque overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920997769.3U CN210599933U (en) | 2019-06-29 | 2019-06-29 | Permanent magnet type load torque overload protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210599933U true CN210599933U (en) | 2020-05-22 |
Family
ID=70715428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920997769.3U Expired - Fee Related CN210599933U (en) | 2019-06-29 | 2019-06-29 | Permanent magnet type load torque overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210599933U (en) |
-
2019
- 2019-06-29 CN CN201920997769.3U patent/CN210599933U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |