CN210128029U - End face tooth friction type torque limiter - Google Patents
End face tooth friction type torque limiter Download PDFInfo
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- CN210128029U CN210128029U CN201822070913.7U CN201822070913U CN210128029U CN 210128029 U CN210128029 U CN 210128029U CN 201822070913 U CN201822070913 U CN 201822070913U CN 210128029 U CN210128029 U CN 210128029U
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- chain wheel
- sleeve
- shaft sleeve
- face
- gear
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 5
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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Abstract
The utility model discloses an end face tooth friction formula moment limiter. The chain wheel transmission mechanism comprises a shaft sleeve arranged on a transmission shaft and a chain wheel which is sleeved on the shaft sleeve in an empty mode and is directly used for outputting power, a gear sleeve is arranged on at least one side of the chain wheel, end face teeth which are matched with each other are arranged on opposite surfaces of the chain wheel and the gear sleeve, a pressing plate which is also arranged on the shaft sleeve is arranged on the outer side of the gear sleeve, an adjusting nut is further arranged on the shaft sleeve, a belleville spring is arranged between the pressing plate and the adjusting nut, and the belleville spring is used for extruding the pressing plate towards the direction of the chain wheel. After the structure is adopted, the matching and matching are reliable, the friction coefficient is stable, the stability and the reliability of torque limitation are greatly improved, the influence of temperature, vibration, lubricating oil and the like is extremely small, the service life is long, the influence on the environment is extremely small, and meanwhile, the structure is simple and easy to realize.
Description
Technical Field
The invention relates to an overload protection device, in particular to an end face tooth friction type torque limiter, and belongs to the technical field of mechanical transmission.
Background
The torque limiter is a mechanical overload protection device, is usually installed between a driving side and a load side of a power transmission, and once overload occurs, a transmission torque exceeds a set value, and then disengagement or slipping occurs, so that a driving side and a driven side of the power transmission are separated, and mechanical equipment is prevented from being damaged by the overload.
The friction torque limiter is one of torque limiters, and in the existing patent technologies, such as chinese patents CN201220405669, CN201520830097 and CN 20161801801809, as long as the friction torque limiter is a friction pair, the friction pair is composed of a friction plate and a sprocket, and the friction plate becomes one of the essential features of the friction torque limiter.
The friction coefficient of the friction plate is changed along with the change of the use time and the use working condition, the stability is relatively poor, particularly, the friction coefficient is seriously influenced by high temperature, and the friction coefficient begins to drop due to the rapid rise of the temperature of a friction material in the friction process, generally reaching more than 200 ℃, so that the limit torque of the torque limiter is unstable and unreliable, and meanwhile, the friction plate belongs to a consumable part, so the service life is generally short; in the process of slipping, a large amount of micro powder is easy to generate, and the environment is polluted.
Disclosure of Invention
The invention aims to solve the technical problem of providing an end face tooth friction type torque limiter which is simple in structure, stable and reliable in torque limiting, small in vibration, long in service life and small in environmental influence.
In order to solve the technical problem, the end face tooth friction type torque limiter comprises a shaft sleeve arranged on a transmission shaft and a chain wheel which is sleeved on the shaft sleeve in an empty mode and is directly used for outputting power, a tooth sleeve is arranged on at least one side of the chain wheel, end face teeth which are matched with each other are arranged on opposite surfaces of the chain wheel and the tooth sleeve, a pressing plate which is also arranged on the shaft sleeve is arranged on the outer side of the tooth sleeve, an adjusting nut is further arranged on the shaft sleeve, a belleville spring is arranged between the pressing plate and the adjusting nut, and the belleville spring is used for extruding the pressing plate towards the direction of the chain wheel and can adjust the spring force.
Two sides of the chain wheel are respectively provided with a gear sleeve, the two gear sleeves are respectively provided with end face teeth matched with the chain wheel, a pressing plate is pressed on the outer side of one gear sleeve, and the other gear sleeve is pressed on a shaft shoulder of the shaft sleeve.
And a self-lubricating copper sleeve is arranged between the chain wheel and the shaft sleeve.
The chain wheel is provided with inner end face teeth, and the two tooth sleeves are provided with outer end face teeth.
The adjusting nut is in threaded connection with the shaft sleeve, and scales used for representing the corresponding relation between the rotating angle and the spring force value are arranged on the end face of the adjusting nut.
The chain wheel is characterized in that an annular groove is formed in the end face of the chain wheel, and an inner fluted disc is installed in the annular groove through a fastening piece.
After the structure is adopted, the gear sleeve which is arranged on one side of the chain wheel and is matched with the chain wheel and is provided with the end face teeth, the pressing plate and the belleville spring which are pressed on the outer side of the gear sleeve are removed, the prior friction plate structure is removed, the end face teeth meshing between the chain wheel with the end face teeth and the gear sleeve with the end face teeth is utilized to realize the friction pair function, the spring force of the belleville spring is adjusted by utilizing the movement of the adjusting nut on the shaft sleeve, the defects that the friction coefficient of the traditional friction plate changes along with the change of the service time and the service condition, the stability is relatively poor, the friction coefficient is seriously influenced by high temperature, the friction material is rapidly increased and obviously reduced in the friction process, the matching and the friction coefficient are reliable, the friction coefficient is stable, the stability and the reliability of torque limitation are greatly improved, the influences of temperature, vibration, lubricating oil and, the environment is little influenced, and meanwhile, the structure is simple and easy to realize.
Drawings
FIG. 1 is a schematic view of a face tooth friction torque limiter according to the present invention in half section;
FIG. 2 is a schematic end view of the sprocket of the present invention;
FIG. 3 is a partial cross-sectional view of the sprocket without the inner chainring of the present invention;
FIG. 4 is a partial cross-sectional view of the sprocket having an inner sprocket of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
The first embodiment is as follows:
as shown in the figure, the end face tooth friction type torque limiter of the embodiment comprises a shaft sleeve 1 arranged on a transmission shaft and a chain wheel 6 which is sleeved on the shaft sleeve in an empty way and is directly used for outputting power, a self-lubricating copper sleeve 7 is arranged between the chain wheel 6 and the shaft sleeve 1, the chain wheel structure comprises a chain wheel 6, a gear sleeve 5 is arranged on one side of the chain wheel 6, end face teeth matched with each other are arranged on opposite faces of the chain wheel 6 and the gear sleeve 5, a pressing plate 4 installed on a shaft sleeve is arranged on the outer side of the gear sleeve 5, an adjusting nut 2 is further installed on the shaft sleeve 1, the adjusting nut 2 is in threaded connection with the shaft sleeve 1, scales used for expressing the corresponding relation between a rotating angle and a spring force value are arranged on the end face of the adjusting nut 2, a butterfly spring 3 is arranged between the pressing plate 4 and the adjusting nut 2, and the butterfly spring 3 is used for extruding the pressing plate towards the direction of the chain wheel 6 and can adjust the spring force of the.
Example two:
the end face tooth friction type torque limiter comprises a shaft sleeve 1 arranged on a transmission shaft and a chain wheel 6 which is sleeved on the shaft sleeve in an empty mode and used for outputting power, wherein a self-lubricating copper sleeve 7 is arranged between the chain wheel 6 and the shaft sleeve 1, a gear sleeve 5 is arranged on each of the left side and the right side of the chain wheel 6 according to the size of required limiting torque, the gear sleeves 5 are called as a first gear sleeve and a second gear sleeve, end face teeth which are matched with the chain wheel 6 are arranged between the opposite matching surfaces of the two gear sleeves 5 and the chain wheel 6, and the first gear sleeve and the second gear sleeve are arranged on the shaft sleeve in a split mode and are arranged on the two sides of the chain wheel; first tooth cover and second tooth cover play the effect of motion between transmission axle sleeve 1 and sprocket 8, transmit sprocket 6 with the moment of torsion because of the frictional force that the effect of packing force produced on the complex terminal surface tooth when pressing tight sprocket 6 through first tooth cover and second tooth cover, the transmission shaft rotates, and in case the overload appears, first tooth cover and second tooth cover will take place to skid on the complex terminal surface tooth with sprocket 6, sprocket 6 will no longer transmit the moment of torsion, the transmission shaft idleness or stop.
In fact, the second gear sleeve is optional, depending on the required limiting torque, if the first gear sleeve and the sprocket have end face teeth matching to meet the required limiting torque value, the second gear sleeve can be eliminated, in order to make the structure simple, in this embodiment, the sprocket 6 is set as an inner end face tooth, both gear sleeves 5 are set as outer end face teeth, so that the sprocket and the first gear sleeve and the second gear sleeve form end face teeth meshing to realize the friction pair function, the outer side of the first gear sleeve is provided with a pressing plate 4, the pressing plate is mounted on the connecting shaft sleeve, the outer side of the pressing plate 4 is provided with a belleville spring 3, namely, the pressing plate 4 is pressed towards the sprocket 6 by the belleville spring 3, the shaft sleeve 1 is also provided with an adjusting nut 2, the adjusting nut 2 is in threaded connection with the shaft sleeve 1 and abuts against the spring along the direction of the sprocket, the end face of the adjusting nut 2 is provided with a scale for representing the, the butterfly spring force is adjusted by moving the adjusting nut on the shaft sleeve, the pressing plate can be omitted outside the second gear sleeve, the shaft sleeve is limited by the shaft sleeve with a shaft shoulder, and the pressing plate 4 and the shaft shoulder of the shaft sleeve 1 extrude the first gear sleeve 5 and the second gear sleeve 8 oppositely, so that the first gear sleeve 5 and the second gear sleeve 8 press the chain wheel 6.
Furthermore, the number of the belleville springs is determined by the limited torque value, and other springs meeting the force value requirement, such as ripple springs and the like, can be selected.
Example three:
as shown in the figures, the end face tooth friction type torque limiter of the embodiment comprises a shaft sleeve 1 arranged on a transmission shaft and a chain wheel 6 which is sleeved on the shaft sleeve in an empty mode and used for outputting power, namely the motion of the shaft sleeve 1 cannot be directly transmitted to the chain wheel 6, and the shaft sleeve 1 is provided with a key groove and a threaded hole used for locking; a self-lubricating copper sleeve 7 is arranged between the chain wheel 6 and the shaft sleeve 1, a ring groove is arranged on one side end face of the chain wheel 6, an inner fluted disc 602 is arranged in the ring groove through a fastening piece 601, a tooth sleeve 5 matched with the inner fluted disc 602 is arranged on one side of the chain wheel 6, preferably, the inner fluted disc of the wearing part is connected with the chain wheel main body through a screw, the circumferential shear force can be borne by a cylindrical pin 603, the number of the screw and the cylindrical pin can be determined according to the torque calculation, the chain wheel adopts a split structure, only the inner fluted disc of the wearing part needs to be replaced during maintenance, the chain wheel main body can be used for a long time after maintenance, the friction coefficient is stable, the influence of temperature is extremely small, a pressing plate 4 which is also arranged on the shaft sleeve is arranged on the outer side of the tooth sleeve 5, an adjusting nut 2 is also arranged on the shaft sleeve 1, the adjusting nut 2 is in threaded connection with, a belleville spring 3 is arranged between the pressure plate 4 and the adjusting nut 2, the belleville spring 3 is used for pressing the pressure plate towards the direction of the chain wheel 6 and can adjust the spring force of the belleville spring by utilizing the movement of the adjusting nut 2 on the shaft sleeve 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A face tooth friction type torque limiter comprises a shaft sleeve (1) arranged on a transmission shaft and a chain wheel (6) which is sleeved on the shaft sleeve and is directly used for outputting power, and is characterized in that: at least one side of the chain wheel (6) is provided with a gear sleeve (5), opposite surfaces of the chain wheel (6) and the gear sleeve (5) are provided with end face teeth which are matched with each other, the outer side of the gear sleeve (5) is provided with a pressing plate (4) which is also installed on the shaft sleeve, an adjusting nut (2) is further installed on the shaft sleeve (1), a belleville spring (3) is arranged between the pressing plate (4) and the adjusting nut (2), and the belleville spring (3) is used for extruding the pressing plate towards the direction of the chain wheel (6) and can adjust the spring force of the belleville spring by utilizing the movement of the adjusting nut (2) on the shaft sleeve (1.
2. A face tooth friction torque limiter according to claim 1 wherein: two sides of the chain wheel (6) are respectively provided with a gear sleeve (5), the gear sleeves (5) are respectively provided with end face teeth matched with the chain wheel (6), a pressing plate (4) is pressed on the outer side of one gear sleeve (5), and the other gear sleeve (5) is pressed on a shaft shoulder of the shaft sleeve.
3. A face tooth friction torque limiter according to claim 1 or claim 2 wherein: and a self-lubricating copper sleeve (7) is arranged between the chain wheel (6) and the shaft sleeve (1).
4. A face tooth friction torque limiter according to claim 2 wherein: the chain wheel (6) is provided with inner end face teeth, and the two gear sleeves (5) are provided with outer end face teeth.
5. A face tooth friction torque limiter according to claim 1, 2 or 4 wherein: the adjusting nut (2) is in threaded connection with the shaft sleeve (1), and scales used for representing the corresponding relation between the rotating angle and the spring force value are arranged on the end face of the adjusting nut (2).
6. A face tooth friction torque limiter according to claim 5 wherein: the chain wheel is characterized in that an annular groove is formed in the end face of the chain wheel (6), and an inner fluted disc (602) is installed in the annular groove through a fastening piece (601).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201822070913.7U CN210128029U (en) | 2018-12-10 | 2018-12-10 | End face tooth friction type torque limiter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201822070913.7U CN210128029U (en) | 2018-12-10 | 2018-12-10 | End face tooth friction type torque limiter |
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CN210128029U true CN210128029U (en) | 2020-03-06 |
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Application Number | Title | Priority Date | Filing Date |
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CN201822070913.7U Withdrawn - After Issue CN210128029U (en) | 2018-12-10 | 2018-12-10 | End face tooth friction type torque limiter |
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CN (1) | CN210128029U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109538655A (en) * | 2018-12-10 | 2019-03-29 | 镇江市高等专科学校 | A kind of frictional limiter of moment of end-tooth |
-
2018
- 2018-12-10 CN CN201822070913.7U patent/CN210128029U/en not_active Withdrawn - After Issue
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109538655A (en) * | 2018-12-10 | 2019-03-29 | 镇江市高等专科学校 | A kind of frictional limiter of moment of end-tooth |
CN109538655B (en) * | 2018-12-10 | 2024-07-02 | 镇江市高等专科学校 | End face tooth friction type moment limiter |
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AV01 | Patent right actively abandoned |
Granted publication date: 20200306 Effective date of abandoning: 20240702 |
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AV01 | Patent right actively abandoned |
Granted publication date: 20200306 Effective date of abandoning: 20240702 |