CN111486185A - Overload protection device - Google Patents
Overload protection device Download PDFInfo
- Publication number
- CN111486185A CN111486185A CN202010231823.0A CN202010231823A CN111486185A CN 111486185 A CN111486185 A CN 111486185A CN 202010231823 A CN202010231823 A CN 202010231823A CN 111486185 A CN111486185 A CN 111486185A
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- Prior art keywords
- overload
- clutch
- arc
- overload clutch
- component
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/21—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
- F16D43/213—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/008—Arrangements for monitoring working conditions, e.g. wear, temperature of clutches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention provides an overload protection device, comprising: the power output component, the power input component, the overload clutch and the elastic component; when the elasticity of the elastic component is larger than the friction force generated by the critical torque, the elastic component pulls the overload clutch to separate from the arc-shaped surface of the power input component; the inner ring of the power input component is provided with an arc-shaped surface, the outer part of the overload clutch is provided with an arc-shaped surface, the shapes of the two arc-shaped surfaces are matched with each other, the inner part of the overload clutch is provided with a tooth-shaped structure, the outer part of the power output component is also provided with a tooth-shaped structure, and the shapes of the two tooth-shaped structures are meshed with each other; a slide way is arranged on the clutch pressing cover and used for pressing the ball on the overload clutch; the elastic component compresses the clutch gland; the radial diameter of the overload clutch arc-shaped surface is gradually increased against the releasing direction; two semi-annular metal friction disks are arranged on the inner side of the power input part, and a gasket is inserted between the two semi-annular metal friction disks and used for temporarily adjusting the gap of the semi-annular metal friction disks.
Description
The technical field is as follows:
the invention is used in the technical field of bundling machine operation, and particularly relates to an overload protection device.
Background art:
the bundling machine is a pasture grass bundling harvesting machine, is mainly used for harvesting various pasture grass, rice, wheat and corn in the field, takes traction of a supporting and pulling machine as power, collects and crushes materials by utilizing a feeding mechanism, and sends the materials to a compression chamber for compression and bundling, and when the feeding mechanism picks up flexible crops such as pasture grass, the flexible crops such as the pasture grass in the field are locally placed too thickly to cause overload. In the prior art, when the feeding mechanism is overloaded, a motor and the like cannot be timely and effectively protected, so that a belt is easily burnt out or a gear of a transmission device is easily damaged, and the bundling machine stops operating.
The invention content is as follows:
the invention discloses an overload protection device, which overcomes the defects in the prior art, so that a bundling machine cannot be damaged due to overheating or overload when being blocked, and comprises the following components: the power output component is used for outputting power to the bundling machine; the power input component is used for connecting external driving force; the overload clutch is used for cutting off the power system and can transversely slide on the clutch gland; the elastic component is used for providing force for cutting off the power system, and when the elastic force of the elastic component is greater than the friction force generated by the critical torque, the elastic component pulls the overload clutch to be separated from the arc-shaped surface of the power input component; the inner ring of the power input component is provided with an arc-shaped surface, the outer part of the overload clutch is provided with an arc-shaped surface, the shapes of the two arc-shaped surfaces are matched with each other, the inner part of the overload clutch is provided with a tooth-shaped structure, the outer part of the power output component is also provided with a tooth-shaped structure, and the shapes of the two tooth-shaped structures are meshed with each other; a slide way is arranged on the clutch pressing cover and used for pressing the ball on the overload clutch; the elastic component compresses the clutch gland; the radial diameter of the overload clutch arc-shaped surface is gradually increased against the releasing direction; two semi-annular metal friction disks are arranged on the inner side of the power input part, and a gasket is inserted between the two semi-annular metal friction disks and used for temporarily adjusting the gap of the semi-annular metal friction disks.
Further, the overload clutch slides transversely on the clutch gland; the arc surface driving the overload clutch is meshed with the arc surface of the power input component; when the power input component receives external driving force to rotate, the overload clutch is driven to rotate through the arc-shaped surface, and then the overload clutch is driven to rotate through the tooth-shaped structure, so that the power output component rotates; when the load borne by the power output part is too large, so that the torque exceeds the threshold value, the elastic part pulls the overload clutch to separate from the arc-shaped surface of the power input part, the overload clutch drives the clutch gland to transversely slide along the power output part, and after the overload clutch is separated from the arc-shaped surface of the power input part due to the elasticity of the elastic part, the power input part idles, so that the kinetic energy of the power output part is discharged, and the overload protection effect is achieved.
Furthermore, the radial diameter of the arc-shaped surface of the overload clutch is gradually increased against the disengaging direction, so that when the rotating speed is gradually reduced along with overlarge load borne by an output component, a point of the overload clutch transversely moves to prepare disengaging action, and the torque of the overload clutch is increased along with the increase of the radial diameter of the overload clutch, so that the automatic torque adjustment is realized, and the condition that the generator cannot normally work due to insufficient torque is prevented; if the load borne by the output component continues to increase, and the output component cannot rotate, the increased torque is still insufficient to resist the elastic force, and the overload clutch and the arc-shaped surface of the power input component are thoroughly separated.
Furthermore, the elastic component is composed of eight spring steel wires, the diameter D of each spring steel wire is 2cm, the diameter D2 of the whole circle of the elastic component is 35cm, the free height H is 83mm, the pitch t is 10.81mm, the maximum working load Pn is 103.816mm, the single-ring deformation fn under the maximum working load is 3.434mm, the single-ring stiffness Pd is 30.227kg/mm, and the free height H is 63 mm.
And further, the device also comprises an overload alarm device, when the friction surface slips, the micro switch connected to the power input component and fastened on the shell generates certain angular displacement along with the friction surface, so that the micro switch is pressed and an electric signal is sent out for alarming.
Compared with the prior art, the invention has the beneficial effects that: when the overload protection device is overloaded, the power input part and the power output part are separated in time, so that the damage of a belt or the damage of gears of a transmission device is effectively avoided, and the components of the power transmission mechanism are prevented from being in an overload state and prevented from being damaged by overload load.
Description of the drawings:
fig. 1 is an overall structural view of an overload protection apparatus of the present invention;
fig. 2 is an exploded view of the overload protection apparatus of the present invention;
in the figure: 1. a power take-off component; 2. a power input component; 3. overload clutch; 4. a clutch gland; 5. an elastic member.
The specific implementation mode is as follows:
the following detailed description of the embodiments of the invention refers to the accompanying drawings.
The overload protection device is applied to the operation control of the bundling machine and comprises a power output part 1 used for outputting power to the bundling machine, a power input part 2 used for connecting external driving force, an overload clutch 3 used for cutting off a power system and capable of transversely sliding on a clutch gland 4, an elastic part 5 used for providing force for cutting off the power system, and when the elastic force of the elastic part is larger than the friction force generated by critical torque, the elastic part pulls the overload clutch 3 to be separated from the arc-shaped surface of the power input part 2. The inner ring of the power input component 2 is provided with an arc-shaped surface, the outer part of the overload clutch 3 is provided with an arc-shaped surface, the shapes of the two arc-shaped surfaces are mutually matched, the inner part of the overload clutch 3 is provided with a tooth-shaped structure, the outer part of the power output component is also provided with a tooth-shaped structure, and the shapes of the two tooth-shaped structures are mutually meshed.
Under the normal working state of the bundling machine, the arc surface of the power input component 2 is meshed with the arc surface of the overload clutch 3; the internal tooth-shaped structure of the overload clutch 3 is meshed with the tooth-shaped structure of the power output component 1, and the overload clutch 3 can transversely slide on the clutch gland 4; a slide way is arranged on the clutch gland 4, and is used for pressing the ball on the overload clutch 3 to reduce friction force during sliding; the elastic part 5 compresses the clutch gland 4 to drive the arc surface of the overload clutch 3 to be meshed and connected with the arc surface of the power input part 2; when the power input component 2 receives external driving force to rotate, the overload clutch 3 is driven to rotate through the arc-shaped surface, and the overload clutch 3 is driven to rotate through the tooth-shaped structure, so that the power output component 1 rotates.
The moment that the power input component 2 makes the power output component 1 rotate is called as the rotation moment, called as the torque for short, when designing the overload protection device, the device should be ensured to be able to transmit the torque of the normal operation of the bundling machine, i.e. to transmit the driving moment which is equal to or slightly less than the critical torque M, when the bundling machine is in an abnormal state, the load borne by the power output component 1 is too large, the rotating speed is reduced or even can not rotate, once the torque exceeds the threshold value, namely the overload occurs, the elastic force of the elastic component is larger than the friction force generated by the critical torque, the elastic component pulls the overload clutch 3 to separate from the arc surface of the power input component 2, meanwhile, the overload clutch 3 drives the clutch gland 4 to slide along the power output component 1 transversely, after the elastic force of the elastic component 5 causes the overload clutch 3 to separate from the arc surface of the power input component 2, the power input, namely, the kinetic energy of the power output part 1 is discharged while the power input part 2 is cut off, so that the overload protection effect is achieved.
In a preferred embodiment, the radial diameter of the arc-shaped surface of the overload clutch 3 is gradually increased against the disengaging direction, so that when the rotating speed is gradually reduced along with overlarge load borne by the output component 1, the overload clutch 3 transversely moves a little to prepare for disengaging action, and the torque is increased along with the increase of the radial diameter, so that the automatic torque adjustment is realized, and the condition that the generator cannot normally work due to insufficient torque is prevented; if the load on the output part 1 continues to increase and the output part cannot rotate, the increased torque is still insufficient to resist the elastic force, and the overload clutch 3 is completely separated from the arc-shaped surface of the power input part 2.
In a preferred embodiment, the spring element comprises eight spring wires, each spring wire having a diameter D of 2cm, the diameter D2 of the entire circle of the spring element being 35cm, the free height H of 83mm, the pitch t of 10.81mm, the maximum operating load Pn of 103.816mm, the single-turn deformation fn of 3.434mm at maximum operating load, the single-turn stiffness Pd of 30.227kg/mm, and the free height H of 63 mm.
In a preferred embodiment, in order to increase the friction of the power input member 2, two semi-annular metallic friction disks are provided inside the power input member 2, the purpose of which is to: after the friction material is worn, the gap of the semi-annular metal friction disks can be adjusted by inserting the gaskets between the two semi-annular metal friction disks, the thickness of each adjusting gasket is generally 3mm, when the friction material is worn too seriously, the semi-annular metal friction disks can be conveniently detached and replaced, and therefore the friction disks which are better and new can be obtained only by opening half of the shell without taking out the real core. In order to facilitate the heat dissipation of the slipping friction surface during overload, heat dissipation holes are also radially processed on the shell corresponding to the friction disc. Through setting up the friction material of different coefficient of friction, can realize that overload protection moment is adjustable, but friction material wearing and tearing volume automatic indication, friction material wearing and tearing volume can show the use amount or surplus use amount according to the live time to when surplus use amount is not enough, send effectual signal of telecommunication.
In a preferred embodiment, an overload alarm device is further installed, and once overload occurs, the friction surface slips, and the power input component 2 is connected with a microswitch fastened on the shell to generate certain angular displacement relative to the microswitch, so that the microswitch is pressed and an electric signal alarm is sent out.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. An overload protection apparatus, comprising: the power output component is used for outputting power to the bundling machine; the power input component is used for connecting external driving force; the overload clutch is used for cutting off the power system and can transversely slide on the clutch gland; the elastic component is used for providing force for cutting off the power system, and when the elastic force of the elastic component is greater than the friction force generated by the critical torque, the elastic component pulls the overload clutch to be separated from the arc-shaped surface of the power input component; the inner ring of the power input component is provided with an arc-shaped surface, the outer part of the overload clutch is provided with an arc-shaped surface, the shapes of the two arc-shaped surfaces are matched with each other, the inner part of the overload clutch is provided with a tooth-shaped structure, the outer part of the power output component is also provided with a tooth-shaped structure, and the shapes of the two tooth-shaped structures are meshed with each other; a slide way is arranged on the clutch pressing cover and used for pressing the ball on the overload clutch; the elastic component compresses the clutch gland; the radial diameter of the overload clutch arc-shaped surface is gradually increased against the releasing direction; two semi-annular metal friction disks are arranged on the inner side of the power input part, and a gasket is inserted between the two semi-annular metal friction disks and used for temporarily adjusting the gap of the semi-annular metal friction disks.
2. The overload protection device of claim 1, wherein: the overload clutch slides on the clutch gland transversely; the arc surface driving the overload clutch is meshed with the arc surface of the power input component; when the power input component receives external driving force to rotate, the overload clutch is driven to rotate through the arc-shaped surface, and then the overload clutch is driven to rotate through the tooth-shaped structure, so that the power output component rotates; when the load borne by the power output part is too large, so that the torque exceeds the threshold value, the elastic part pulls the overload clutch to separate from the arc-shaped surface of the power input part, the overload clutch drives the clutch gland to transversely slide along the power output part, and after the overload clutch is separated from the arc-shaped surface of the power input part due to the elasticity of the elastic part, the power input part idles, so that the kinetic energy of the power output part is discharged, and the overload protection effect is achieved.
3. The overload protection device of claim 1, wherein: the radial diameter of the arc-shaped surface of the overload clutch is gradually increased along the releasing direction, so that when the rotating speed is gradually reduced along with overlarge load borne by an output component, a point of the overload clutch transversely moves to prepare for releasing action, and the torque of the overload clutch is increased along with the increase of the radial diameter of the overload clutch, so that the automatic torque adjustment is realized, and the condition that the generator cannot normally work due to insufficient torque is prevented; if the load borne by the output component continues to increase, and the output component cannot rotate, the increased torque is still insufficient to resist the elastic force, and the overload clutch and the arc-shaped surface of the power input component are thoroughly separated.
4. The overload protection device of claim 1, wherein: the elastic component is composed of eight spring steel wires, the diameter D of each spring steel wire is 2cm, the diameter D2 of the whole circle formed by the elastic component is 35cm, the free height H is 83mm, the pitch t is 10.81mm, the maximum working load Pn is 103.816mm, the single-ring deformation fn under the maximum working load is 3.434mm, the single-ring rigidity Pd is 30.227kg/mm, and the free height H is 63 mm.
5. The overload protection device of claim 1, wherein: the automatic friction surface friction alarm device also comprises an overload alarm device, when the friction surface slips, the overload alarm device is connected to the power input component and generates certain angular displacement relative to the microswitch fastened on the shell, so that the microswitch is pressed and an electric signal alarm is sent out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010231823.0A CN111486185A (en) | 2020-03-27 | 2020-03-27 | Overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010231823.0A CN111486185A (en) | 2020-03-27 | 2020-03-27 | Overload protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111486185A true CN111486185A (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010231823.0A Withdrawn CN111486185A (en) | 2020-03-27 | 2020-03-27 | Overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111486185A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011857A (en) * | 2009-09-07 | 2011-04-13 | 张立井 | Novel speed reducer with torsion limitation function |
| CN202381586U (en) * | 2011-12-07 | 2012-08-15 | 山东巨明机械有限公司 | End face dog type safety clutch |
| CN103557244A (en) * | 2013-11-19 | 2014-02-05 | 无锡市凯旋电机有限公司 | Clutch device with overload protection and adjustable output force |
| CN205244282U (en) * | 2015-11-06 | 2016-05-18 | 宁波爱乐吉电动工具股份有限公司 | Branch chip machine automatic safety device |
| CN108061111A (en) * | 2018-01-19 | 2018-05-22 | 泗县伟达农机具有限公司 | Rotary tillage fertilizer overload protection arrangement |
| CN207848254U (en) * | 2018-01-25 | 2018-09-11 | 北京兴博元科技发展有限责任公司 | A kind of electromagnetic clutch with quick response function |
-
2020
- 2020-03-27 CN CN202010231823.0A patent/CN111486185A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011857A (en) * | 2009-09-07 | 2011-04-13 | 张立井 | Novel speed reducer with torsion limitation function |
| CN202381586U (en) * | 2011-12-07 | 2012-08-15 | 山东巨明机械有限公司 | End face dog type safety clutch |
| CN103557244A (en) * | 2013-11-19 | 2014-02-05 | 无锡市凯旋电机有限公司 | Clutch device with overload protection and adjustable output force |
| CN205244282U (en) * | 2015-11-06 | 2016-05-18 | 宁波爱乐吉电动工具股份有限公司 | Branch chip machine automatic safety device |
| CN108061111A (en) * | 2018-01-19 | 2018-05-22 | 泗县伟达农机具有限公司 | Rotary tillage fertilizer overload protection arrangement |
| CN207848254U (en) * | 2018-01-25 | 2018-09-11 | 北京兴博元科技发展有限责任公司 | A kind of electromagnetic clutch with quick response function |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200804 |