CN215673268U - Friction type torsion overload protection device - Google Patents
Friction type torsion overload protection device Download PDFInfo
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- CN215673268U CN215673268U CN202120475959.6U CN202120475959U CN215673268U CN 215673268 U CN215673268 U CN 215673268U CN 202120475959 U CN202120475959 U CN 202120475959U CN 215673268 U CN215673268 U CN 215673268U
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- synchronous belt
- overload protection
- input shaft
- friction type
- torsion
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- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 11
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- 230000008034 disappearance Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model discloses a friction type torsion overload protection device, which mainly comprises a synchronous belt wheel, a torsion nut, a pre-tightening pressure and an input shaft, wherein the input shaft is applied with an input torque through rotation, the end part of the input shaft is sequentially provided with a fixed step, a matching shaft end and a matching thread section, the synchronous belt wheel is arranged in the input shaft and matches the shaft end, one side end surface is matched and tightly attached to the fixed step, the torsion nut is arranged in the matching thread section through thread matching, and the pre-tightening pressure is applied between the torsion nut and the end surface of the synchronous belt wheel, so that the friction type torsion overload protection device has the advantages that: a friction type torque overload protection device is designed, a nut or a bolt is used for adjusting the spring force, and then pre-tightening force (friction force) is adjusted, after the required torque exceeds a limit value due to machine load vibration, overload or mechanical failure, the friction type torque overload protection device limits the torque transmitted by a transmission system in a sliding mode, and automatically engages after disappearance of overload conditions, does not need to be set again, and avoids expensive shutdown loss.
Description
Technical Field
The utility model belongs to the technical field of safety protection of transmission equipment, and particularly relates to a friction type torsion overload protection device.
Background
Overload protection device is the key problem of design in the transmission cooperation always, for example synchronous belt drive, gear drive etc. moreover all know to overload and can produce serious damage influence after taking place, threaten human life safety even, general transmission process main form: the friction type torque overload protection device is designed at present, after the required torque exceeds a limit value due to machine load vibration, overload or mechanical failure in use, the friction type torque overload protection device limits the torque transmitted by a transmission system in a sliding mode, automatically engages after the overload condition disappears, does not need to be set again, and avoids expensive shutdown loss.
Disclosure of Invention
In order to overcome the defects, the utility model provides a friction type torsion overload protection device.
The technical scheme adopted by the device for solving the technical problems is as follows: the device mainly comprises a synchronous belt pulley, a torque nut, pre-tightening pressure and an input shaft, wherein input torque is applied to the input shaft through rotation, a fixed step, a matched shaft section and a matched thread section are sequentially arranged at the end part of the input shaft, the synchronous belt pulley is installed in the input shaft and matched with the shaft section, one side end face is matched and tightly attached to the fixed step, the torque nut is installed in the matched thread section through thread matching, the pre-tightening pressure is applied between the torque nut and the end face of the synchronous belt pulley, and the synchronous belt pulley is in transmission matching with a driven belt pulley through a conveying belt; the synchronous pulley and the input shaft are in clearance fit in a fit shaft section fit mode, the length of the fit shaft section is smaller than the width of the synchronous pulley, compression springs are installed in a plurality of quantity hole grooves formed in the end face of the torsion nut evenly, the other end of each compression spring is connected to the corresponding joint gasket, the other end face of each joint gasket is in contact fit with the end face of the synchronous pulley, the matching surface of the synchronous pulley and the corresponding joint gasket is provided with a frosted surface, pre-tightening pressure is applied between the corresponding joint gasket and the frosted surface, the pre-tightening pressure is determined by the depth of the screw-in fit thread section of the torsion nut, and the input shaft of the torsion nut is the installation shaft of the synchronous pulley in a fit mode.
The working principle is as follows: aiming at the conditions that the designed overload is mostly shut down for operation or maintenance and is produced after being repaired, which is very troublesome, the friction type torsion overload protection device is designed at present, after the required torque exceeds a limit value due to the vibration, overload or mechanical failure of a machine load when the device is used, the friction type torsion overload protection device limits the torque transmitted by a transmission system in a sliding mode, and automatically engages after the overload condition disappears, the device does not need to be set again, so that the expensive shutdown loss is avoided, and the main content is as follows: the device mainly comprises a synchronous belt pulley, a torque nut, pre-tightening pressure and an input shaft, wherein input torque is applied to the input shaft through rotation, a fixed step, a matched shaft section and a matched thread section are sequentially arranged at the end part of the input shaft, the synchronous belt pulley is arranged in the input shaft, one side end face of the synchronous belt pulley is matched and tightly attached to the fixed step, the torque nut is arranged in the matched thread section through thread matching, the pre-tightening pressure is applied between the torque nut and the end face of the synchronous belt pulley, the synchronous belt pulley is in transmission matching with a driven belt pulley through a conveying belt, compression springs are arranged in a plurality of hole grooves uniformly formed in the end face of the torque nut, and the compression springs are attached and fixed to the end face of the synchronous belt pulley through the set pre-tightening pressure, so that certain friction force is generated between the synchronous belt pulley and the driven belt pulley.
Particularly, the length of the matching shaft section is smaller than the width of the synchronous belt pulley, so that the torsion nut can be adjusted, attached and fixed in a limiting way; the matching surface of the synchronous belt wheel and the joint gasket is provided with a frosted surface, the pre-tightening pressure is applied between the joint gasket and the frosted surface, the friction force under the action of a certain pre-tightening pressure is increased, and the magnitude of the ultimate load torque is further increased; the input shaft matched with the torque nut is the mounting shaft of the synchronous pulley, and the maximum torque is generally generated on the input shaft of the small pulley, so that the torque nut can be mounted on the input shaft.
Has the advantages that: a friction type torque overload protection device is designed, a nut or a bolt is used for adjusting the spring force, and then pre-tightening pressure (friction force) is adjusted, after the required torque exceeds a limit value due to machine load vibration, overload or mechanical failure, the friction type torque overload protection device limits the torque transmitted by a transmission system in a sliding mode, and automatically engages after disappearance of overload conditions, does not need to be set again, and avoids expensive shutdown loss.
Drawings
The device of the utility model is further described below with reference to the figures and examples.
FIG. 1 is a view of the apparatus of the friction type torsion overload protection apparatus of the present invention;
FIG. 2 is a side view of a friction type torsion overload protection apparatus of the present invention;
1. input shaft, input torque 2, fixed step 3, synchronous belt wheel 4, matching shaft section 5-1 frosted surface 6, torsion nut 7, matching thread section 8, compression spring 9, joint gasket 10, pre-tightening pressure 11, driven belt wheel 12 and conveying belt 12
Detailed Description
As shown in fig. 1-2, the device mainly comprises a synchronous pulley 4, a torque nut 6, a pre-tightening pressure 10 and an input shaft 1, wherein an input torque 2 is applied to the input shaft 1 through rotation, a fixed step 3, a matching shaft section 5 and a matching thread section 7 are sequentially arranged at the end part of the input shaft 1, the synchronous pulley 4 is arranged in the matching shaft section 5 in the input shaft 1, one end surface of one side of the synchronous pulley is closely attached to the fixed step 3 in a matching way, the torque nut 6 is arranged in the matching thread section 7 in a threaded matching way, the pre-tightening pressure 10 is applied between the torque nut 6 and the end surface of the synchronous pulley 4, and the synchronous pulley 4 is in transmission matching with a driven pulley 11 through a transmission belt 12; the synchronous pulley 4 and the input shaft 1 are matched in a clearance fit mode through a matching shaft section 5, the length of the matching shaft section 5 is smaller than the width of the synchronous pulley 4, compression springs 8 are installed in a plurality of hole grooves uniformly formed in the end face of the torque nut 6, the other end of each compression spring 8 is connected to a bonding gasket 9, the other end face of each bonding gasket 9 is in contact fit with the end face of the synchronous pulley 4, frosted surfaces 5-1 are arranged on the matching surfaces of the synchronous pulley 4 and the bonding gasket 9, pre-tightening pressure 10 is applied between the bonding gasket 9 and the frosted surfaces 5-1, the pre-tightening pressure is determined by the depth of 7 degrees of the screwing-in matching thread section of the torque nut 6, and the input shaft 1 where the torque nut 6 is installed in a matched mode is the installation shaft of the synchronous pulley 4.
The working principle of the operation of the whole device is as follows: aiming at the conditions that the designed overload is mostly shut down for operation or maintenance and is produced after being repaired, which is very troublesome, the friction type torsion overload protection device is designed at present, after the required torque exceeds a limit value due to the vibration, overload or mechanical failure of a machine load when the device is used, the friction type torsion overload protection device limits the torque transmitted by a transmission system in a sliding mode, and automatically engages after the overload condition disappears, the device does not need to be set again, so that the expensive shutdown loss is avoided, and the main content is as follows: the device mainly comprises a synchronous belt pulley 4, a torque nut 6, a pre-tightening pressure 10 and an input shaft 1, wherein an input torque 2 is applied to the input shaft 1 through rotation, a fixed step 3, a matched shaft section 5 and a matched threaded section 7 are sequentially arranged at the end part of the input shaft 1, the synchronous belt pulley 4 is arranged in the matched shaft section 5 in the input shaft 1, one end face of one side of the synchronous belt pulley 4 is in fit and close contact with the fixed step 3, the torque nut 6 is arranged in the matched threaded section 7 through threaded fit, the pre-tightening pressure 10 is applied between the torque nut 6 and the end face of the synchronous belt pulley 4, the synchronous belt pulley 4 is in transmission fit with a driven belt pulley 11 through a conveying belt 12, compression springs 8 are arranged in a plurality of hole grooves uniformly arranged on the end face of the torque nut 6, the other ends of the compression springs 8 are connected to a fitting gasket 9, and the other end face of the fitting gasket 9 is in contact fit with the end face of the synchronous belt pulley 4, so that a certain friction force is generated between the two.
Particularly, the length of the matching shaft section 5 is smaller than the width of the synchronous pulley 4, so that the torsion nut 6 can be adjusted, attached and fixed to the limit; a frosted surface 5-1 is arranged on the matching surface of the synchronous pulley 4 and the joint gasket 9, and the pre-tightening pressure 10 is applied between the joint gasket 9 and the frosted surface 5-1, so that the friction force under the action of a certain pre-tightening pressure is improved, and the magnitude of the ultimate load torque is further improved; the input shaft 1 to which the torque nut 6 is fitted is a mounting shaft of the timing pulley 4, and the maximum torque is generally generated on the input shaft of the small pulley, so that the torque nut 6 is mounted on the input shaft.
The whole design device has the beneficial effects that the friction type torque overload protection device is designed, the spring force is adjusted by the nut or the bolt, the pre-tightening pressure (friction force) is further adjusted, after the required torque exceeds a limit value due to machine load vibration, overload or mechanical failure, the friction type torque overload protection device limits the torque transmitted by a transmission system in a sliding mode, and the friction type torque overload protection device is automatically meshed after disappearance of overload, does not need to be set again, and avoids expensive shutdown loss.
Claims (6)
1. A friction type torsion overload protection device mainly comprises a synchronous belt wheel, a torsion nut, pre-tightening pressure and an input shaft, and is characterized in that input torque is applied to the input shaft through rotation, a fixed step, a matched shaft section and a matched thread section are sequentially arranged at the end part of the input shaft, the synchronous belt wheel is installed at the matched shaft section in the input shaft, one side end face of the synchronous belt wheel is matched and tightly attached to the fixed step, the torsion nut is installed at the matched thread section through thread matching, the pre-tightening pressure is applied between the torsion nut and the end face of the synchronous belt wheel, and the synchronous belt wheel is in transmission matching with a driven belt wheel through a conveying belt.
2. A friction type torsion overload protection apparatus according to claim 1, wherein: the synchronous belt wheel and the matching shaft section in the input shaft are in clearance fit, and the length of the matching shaft section is smaller than the width of the synchronous belt wheel.
3. A friction type torsion overload protection apparatus according to claim 1, wherein: and compression springs are installed in a plurality of hole grooves uniformly formed in the end face of the torsion nut, the other ends of the compression springs are connected to the attaching gasket, and the other end face of the attaching gasket is in contact fit with the end face of the synchronous belt pulley.
4. A friction type torsion overload protection apparatus according to claim 3, wherein: and the matching surface of the synchronous belt wheel and the joint gasket is provided with a frosted surface, and the pre-tightening pressure is applied between the joint gasket and the frosted surface.
5. A friction type torsion overload protection apparatus according to claim 1, wherein: the pre-tightening pressure is determined by the depth of the torsion nut screwed into the matched thread section.
6. A friction type torsion overload protection apparatus according to claim 1, wherein: the input shaft matched with the torque nut is the mounting shaft of the synchronous belt pulley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475959.6U CN215673268U (en) | 2021-03-05 | 2021-03-05 | Friction type torsion overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475959.6U CN215673268U (en) | 2021-03-05 | 2021-03-05 | Friction type torsion overload protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215673268U true CN215673268U (en) | 2022-01-28 |
Family
ID=79969047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120475959.6U Expired - Fee Related CN215673268U (en) | 2021-03-05 | 2021-03-05 | Friction type torsion overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215673268U (en) |
-
2021
- 2021-03-05 CN CN202120475959.6U patent/CN215673268U/en not_active Expired - Fee Related
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| 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: 20220128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |