CN201934611U - Gear transmission structure with overload protection function - Google Patents

Gear transmission structure with overload protection function Download PDF

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Publication number
CN201934611U
CN201934611U CN2010206972220U CN201020697222U CN201934611U CN 201934611 U CN201934611 U CN 201934611U CN 2010206972220 U CN2010206972220 U CN 2010206972220U CN 201020697222 U CN201020697222 U CN 201020697222U CN 201934611 U CN201934611 U CN 201934611U
Authority
CN
China
Prior art keywords
output shaft
friction plate
gear
overload protection
protection function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010206972220U
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Chinese (zh)
Inventor
周益波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO HUAYI MOTOR CO Ltd
Original Assignee
NINGBO HUAYI MOTOR CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NINGBO HUAYI MOTOR CO Ltd filed Critical NINGBO HUAYI MOTOR CO Ltd
Priority to CN2010206972220U priority Critical patent/CN201934611U/en
Application granted granted Critical
Publication of CN201934611U publication Critical patent/CN201934611U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a gear transmission structure with overload protection function. The gear transmission structure comprises an output shaft (1) and a transmission gear (2), wherein the transmission gear (2) is arranged on the output shaft (1). The gear transmission structure is characterized in that the transmission gear (2) is arranged on the output shaft (1) by a clutch structure, and the clutch structure ensures the transmission gear (2) to slip relative to the output shaft (1) under the condition of the overload of the output shaft (1); and the clutch structure comprises a drive friction plate (3) and two driven friction plates (4), wherein the drive friction plate (3) is fixed in a mounting hole (21) in the middle of the transmission gear (2) and rotates with the transmission gear (2), and the two driven friction plates (4) are connected with the output shaft (1) and rotate with the output shaft (1). When external force is greater than actual bearing capability of the transmission gear, the clutch structure works, the gear slips relative to the output shaft so as to ensure the gear is not fractured and play the role of overload protection.

Description

Gear transmission structure with overload protection function
Technical field
The utility model relates to a kind of gear transmission structure with overload protection function.
Background technique
The output shaft of motor directly meshes with the direct geared of the gearbox of motor inside, output shaft directly is connected on the output gear in the gear train of gearbox, the rotation of output gear directly drives the output shaft rotation, and output shaft drives load again and rotates, and finishes whole transmission process.
Just there is following problem in this, and excessive when the load of gear, the resisting moment that the gear transmission in the gearbox in the motor is subjected to is excessive, and when external force greater than the actual strength of gear the time, gear is understood broken teeth, thereby causes that motor is stuck not to be changeed.Moreover, existing other gear transmission structure, its gear is directly to be fixed on the output shaft, or the direct driven gear rotation of output shaft, or the rotation of gear driven output shaft, all exists load excessive, and causes the damage of gear transmission structure.
The overload protection mode that existing motor is adopted; the general mode of circuit or electronic component that adopts realizes protection; as an application number is the Chinese invention patent " DC motor overload current control circuit " of ZL200710148857.8 (publication number is CN101383501A); reaching application number is the Chinese invention patent " drive unit and overload protection method thereof " of ZL200910300662.X (publication number is CN101826771A), and they all provide a kind of like this method.Adopt this method that motor is carried out overload protection and have defect of high cost, and circuit or electronic component are fragile.
The motor that also has adopts machinery type to carry out overload protection; as an application number is the Chinese invention patent " motor overload protection device " of ZL200810306683.8 (notification number is CN101771373A), and the patent No. is the structure that the Chinese utility model patent " speed reducer with overload protection function " of ZL200920000237.4 (notification number is CN201351721Y) has disclosed a kind of like this motor overload protection.But it is many that this structure relates to parts, and each parts is difficult for processing, assembling inconvenience, and cost height.
In sum, existing gear transmission structure with overload protection function also can be further improved.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of simple and reasonable and production and assembly to have the gear transmission structure of overload protection function easily at above-mentioned prior art present situation, and this drive mechanism also has the low advantage of cost.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of gear transmission structure with overload protection function; include output shaft; and be installed in driving gear on the output shaft; it is characterized in that: described driving gear is installed on the output shaft by clutch structure, and this clutch structure guarantees to make under the excessive situation of output shaft load the relative output shaft of driving gear to skid.
Above-mentioned clutch structure comprises that a slice active friction plate and two are from movable friction plate, described active friction plate is fixed in the mounting hole at driving gear middle part and can rotates with driving gear, described active friction plate middle part also has the perforation of passing for output shaft, described output shaft can and can rotate in this perforation relatively, described two are connected on the output shaft and can rotate with output shaft from movable friction plate, and described two lay respectively at up and down both sides of active friction plate from movable friction plate, the outer end of described output shaft is provided with hold down gag, this hold down gag is pressed together from movable friction plate and active friction plate two, thereby makes two closely to contact with the front/rear end of active friction plate respectively from movable friction plate.
It is few that aforementioned clutch structure relates to parts; and the structure that relates to each parts is all very simple; the processing assembling is all very convenient; this clutch structure relies on active friction plate and comes transmitting torque from the rubbing action between the surface of contact of movable friction plate; can temporarily separate automatically or skid after reaching certain moment of torsion between the two; then combination automatically during less than certain moment of torsion, thus realization is to the overload protective function of gear.
Above-mentioned hold down gag for after riveting is carried out in the output shaft lower end, form with outermost end compress compressing a little of contacting from movable friction plate.This hold down gag can guarantee effectively that two are pressed together from movable friction plate and active friction plate and are difficult for looseningly, and frictional force (setting by the actual torque demand that uses) compresses a little by output shaft one end and controls.Certainly also can adopt the mode of jump ring or nut that two are pressed together from movable friction plate and active friction plate, be that this mode that compresses is easily become flexible in use for some time.
Above-mentioned driving gear and active friction plate molding and forming are together.Fine assurance driving gear and active friction plate integrality also can adopt alternate manner that both are fixed certainly.
The lower end of above-mentioned output shaft has the assembly department of downward extension, this assembly department profile is the column after cylindrical outer shape machines away two planes relatively, described two have the positioning hole that profile and assembly department match from movable friction plate middle part, describedly be set on the assembly department by positioning hole and can rotate with output shaft from movable friction plate, described assembly department passes the perforation of active friction plate and can rotate relatively.
Form shoulder block between assembly department and the output shaft, what will be positioned at the upper end carries out upper limit from movable friction plate, and the cooperation by non-circular assembly department and non-circular mounting hole, assurance can be rotated with output shaft from movable friction plate, and the mode that also can adopt keyway to cooperate will be installed on the assembly department from movable friction plate certainly.
The lower end of above-mentioned assembly department has the cylindrical installation axial region of downward extension.Be more suitable for like this this gear transmission structure is used in the speed reducer of motor, installation shaft is installed on the bearing in the speed reducer by axial region is installed.
Compared with prior art, advantage of the present utility model is: when external force greater than the actual strength of driving gear time the, clutch structure work, gear is relative with output shaft to skid, thereby guarantees that gear can not rupture, and plays the effect of overload protection.
Description of drawings
Fig. 1 is the utility model embodiment's a structure sectional view;
Fig. 2 is the utility model embodiment's a three-dimensional exploded view.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, 2, be a preferred embodiment of the present utility model.
A kind of gear transmission structure with overload protection function; include output shaft 1; and be installed in driving gear 2 on the output shaft 1; driving gear 2 is a plastic gear; the lower end of output shaft 1 has the assembly department 11 of downward extension; these assembly department 11 profiles are the column after cylindrical outer shape machines away two planes relatively, and the lower end of assembly department 11 has the cylindrical installation axial region 12 of downward extension.Driving gear 2 is installed in by clutch structure on the assembly department 11 of output shaft 1, and this clutch structure guarantees to make under the excessive situation of output shaft 1 load driving gear 2 relative output shafts 1 to skid.
Clutch structure comprises that a slice active friction plate 3 and two are from movable friction plate 4, active friction plate 3 with the mode of inserts and driving gear 2 molding and forming together, so active friction plate 3 can be with driving gear 2 rotations, active friction plate 3 middle parts also have the perforation 31 that the assembly department 11 for output shaft 1 passes, and assembly department 11 passes the perforation 31 of active friction plate and can rotate relatively.
On two assembly departments 11 that are connected output shaft 1 from movable friction plate 4 and can be with output shaft 1 rotation, promptly two have the positioning hole 41 that profile and assembly department match from movable friction plate 4 middle parts, are set on the assembly department 11 by positioning hole 41 and can be with output shaft 1 rotation from movable friction plate 4;
And two lay respectively at active friction plate from movable friction plate 4 about in the of 3 both sides, the outer end of the assembly department 11 of output shaft 1 is provided with hold down gag, this hold down gag is pressed together from movable friction plate 4 and active friction plate 3 two, thereby makes two closely to contact with the front/rear end of active friction plate 3 respectively from movable friction plate 4.Hold down gag for after riveting is carried out in output shaft 1 lower end, form with outermost end from movable friction plate 4 compress contact compress a little 5, frictional force (setting by the actual torque demand that uses) is leaned on output shaft one end to compress a little and is controlled
Working principle of the present utility model is as follows:
This gear transmission structure relies on active friction plate 3 and two to come transmitting torque from the rubbing action between the surface of contact of movable friction plate 4; owing to of the be connected transmission of the inner gearbox gear of the effect motor of frictional force with output shaft 1 realizable force; when moment of torsion on the output shaft 1 exceeds frictional force between movable friction plate 4 of active friction plate 3 and two; rotating plate friction plate 3 with separate or slipping state from movable friction plate 4; the transmission of motor speed varying case and output shaft power is interrupted, and plays the overload protective function to motor speed varying case gear.
Concrete application is as follows: shake the head electric fan when hand is pulled because of carelessness, motor gear can skid automatically and not rupture, thereby guarantees the working life of motor, ensures the normal function of fan head swinging.
This gear transmission structure is suitable on the motor most, but is not limited to motor, goes back other gear transmission structure.

Claims (6)

1. gear transmission structure with overload protection function; include output shaft (1); and be installed in driving gear (2) on the output shaft (1); it is characterized in that: described driving gear (2) is installed on the output shaft (1) by clutch structure, and this clutch structure guarantees to make under the excessive situation of output shaft (1) load the relative output shaft (1) of driving gear (2) to skid.
2. the gear transmission structure with overload protection function according to claim 1; it is characterized in that: described clutch structure comprises that a slice active friction plate (3) and two are from movable friction plate (4); described active friction plate (3) is fixed in the mounting hole (21) at driving gear (2) middle part and can rotates with driving gear (2); described active friction plate (3) middle part also has the perforation (31) of passing for output shaft (1); described output shaft (1) can bore a hole at this in (31) can and rotation relatively; described two are connected output shaft (1) from movable friction plate (4) and go up and can rotate with output shaft (1); and described two lay respectively at active friction plate (3) both sides up and down from movable friction plate (4); the outer end of described output shaft (1) is provided with hold down gag; this hold down gag is pressed together from movable friction plate (4) and active friction plate (3) two, thereby makes two closely to contact with the front/rear end of active friction plate (3) respectively from movable friction plate (4).
3. the gear transmission structure with overload protection function according to claim 2 is characterized in that: described hold down gag for after riveting is carried out in output shaft (1) lower end, form with outermost end from movable friction plate (4) compress contact compress point (5).
4. the gear transmission structure with overload protection function according to claim 2 is characterized in that: described driving gear (2) and active friction plate (3) molding and forming are together.
5. the gear transmission structure with overload protection function according to claim 2; it is characterized in that: the lower end of described output shaft (1) has the assembly department (11) of downward extension; this assembly department (11) profile is the column after cylindrical outer shape machines away two planes relatively; described two have the positioning hole (41) that profile and assembly department match from movable friction plate (4) middle part; describedly be set in by positioning hole (41) that assembly department (11) is gone up and can be with output shaft (1) rotation from movable friction plate (4), described assembly department (11) passes the perforation (31) of active friction plate and can rotate relatively.
6. the gear transmission structure with overload protection function according to claim 5 is characterized in that: the lower end of described assembly department (11) has the cylindrical installation axial region of downward extension (12).
CN2010206972220U 2010-12-27 2010-12-27 Gear transmission structure with overload protection function Expired - Lifetime CN201934611U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206972220U CN201934611U (en) 2010-12-27 2010-12-27 Gear transmission structure with overload protection function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206972220U CN201934611U (en) 2010-12-27 2010-12-27 Gear transmission structure with overload protection function

Publications (1)

Publication Number Publication Date
CN201934611U true CN201934611U (en) 2011-08-17

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Application Number Title Priority Date Filing Date
CN2010206972220U Expired - Lifetime CN201934611U (en) 2010-12-27 2010-12-27 Gear transmission structure with overload protection function

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052438A (en) * 2010-12-27 2011-05-11 宁波划一马达有限公司 Gear drive structure with function of overload protection
CN106151456A (en) * 2016-08-31 2016-11-23 湖北三环成套工业有限公司 A kind of overload self-destruction gear
CN106424484A (en) * 2016-11-29 2017-02-22 浙江心梦享家居有限公司 Transmission mechanism for S spring roll bending machine
WO2017070839A1 (en) * 2015-10-27 2017-05-04 深圳市兆威机电有限公司 Gear reducer and gear linkage mechanism thereof
CN107956624A (en) * 2016-10-17 2018-04-24 索恩格汽车德国有限责任公司 The planetary gear mechanism with integrated slip-clutch for motor
CN110050136A (en) * 2016-12-13 2019-07-23 舍弗勒技术股份两合公司 The driving system of gear train with safety clutch and energy electric drive

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052438A (en) * 2010-12-27 2011-05-11 宁波划一马达有限公司 Gear drive structure with function of overload protection
WO2017070839A1 (en) * 2015-10-27 2017-05-04 深圳市兆威机电有限公司 Gear reducer and gear linkage mechanism thereof
CN106151456A (en) * 2016-08-31 2016-11-23 湖北三环成套工业有限公司 A kind of overload self-destruction gear
CN107956624A (en) * 2016-10-17 2018-04-24 索恩格汽车德国有限责任公司 The planetary gear mechanism with integrated slip-clutch for motor
CN107956624B (en) * 2016-10-17 2021-09-24 索恩格汽车德国有限责任公司 Planetary gear train for an electric machine with an integrated slip clutch
CN106424484A (en) * 2016-11-29 2017-02-22 浙江心梦享家居有限公司 Transmission mechanism for S spring roll bending machine
CN110050136A (en) * 2016-12-13 2019-07-23 舍弗勒技术股份两合公司 The driving system of gear train with safety clutch and energy electric drive

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CX01 Expiry of patent term

Granted publication date: 20110817

CX01 Expiry of patent term