CN105782284B - Torque limiter - Google Patents
Torque limiter Download PDFInfo
- Publication number
- CN105782284B CN105782284B CN201410835413.1A CN201410835413A CN105782284B CN 105782284 B CN105782284 B CN 105782284B CN 201410835413 A CN201410835413 A CN 201410835413A CN 105782284 B CN105782284 B CN 105782284B
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- torque
- cutting portion
- revolving part
- torque limiter
- cutting
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Abstract
The purpose of the present invention is to provide a kind of torque limiters, and which increase the reliabilities for limiting torque.For the torque limiter for realizing the purpose, there are driving side revolving part, slave end revolving part and the torque-transfer members being arranged between driving side revolving part and slave end revolving part；The torque-transfer members include with the bolster for absorbing change in torque impact and the first cutting portion that can cut off in overload, its main feature is that, which further includes the second cutting portion for being equipped with of radially inner side in first cutting portion.
Description
Technical field
The present invention relates to the torque limiters that transmitting torque is limited in actuating unit, to avoid load overload, especially
It is related to the torque limiter of the driving side of compressor used for automobile air conditioning.
Background technique
There are many occasions applied for torque limiter, such as are located at automobile engine and the compressor for air conditioning
In power transfer path.Typical outer control variable displacement compressor has a swash plate being obliquely supported on main shaft, swash plate angle
Degree can be changed by the electrically-controlled valve of compressor.When the inside of outer control variable displacement compressor is broken down, and torque is made to become larger,
Excessive torque can generate big impact to engine.Therefore, compressor must have overload protecting mechanism, so that in compressor
When the torque in portion is excessive, compressor and belt pulley are detached from, and avoid the excessive impact to engine of compressor internal torque.
The U.S. Patent Publication Document of Patent No. US7850558, entitled " compressor power transfer device " one kind
Can rupture failure torque limiter, be threadedly coupled between the middle part and wheel hub outer ring of limited section, outer member and bolster connect
It connects, is neck between middle part and outer member.When the torque transmitted is excessive, neck will be broken, so that intermediate
It is separated from each other between portion and outer member.At this point, also torque can not be transmitted even if the belt pulley that outer member is connected continues to rotate
To wheel hub.Power between belt pulley and wheel hub is transmitted cutting by torque limiter, prevents excessive torque from causing in compressor
The damage of portion's part.
Above-mentioned technical proposal the problem is that: punch forming, which can be used, in neck can also be used powder metallurgy process system
At as since punching precision is low, and having fracture belt and compressive zone on neck notch, the size of fracture belt using process for stamping
Unstable, material punching press after-hardening degree is also inconsistent, and mold requires height, so causing the breakaway torque of torque limiter unstable
Fixed, precision is difficult to ensure.Such as use powder metallurgy, then it is higher to the intensity of material and grinding tool required precision, need tasting repeatedly
Test material material formula and technological parameter.
Summary of the invention
The purpose of the present invention is to provide a kind of torque limiters, and which increase the reliabilities for limiting torque.
For the torque limiter for realizing the purpose, there is driving side revolving part, slave end revolving part and setting to drive
Torque-transfer members between dynamic side revolving part and slave end revolving part；The torque-transfer members include having to absorb change in torque
The bolster of impact and the first cutting portion that can be cut off in overload, its main feature is that, which further includes described
The second cutting portion that the radially inner side of first cutting portion is equipped with.
The torque limiter, further feature are that the processing technology precision of first cutting portion is lower than institute
The processing technology precision of the second cutting portion is stated, the design breakaway torque of first cutting portion is set smaller than second cutting
The design breakaway torque in portion.
The torque limiter, further feature are that first cutting portion is formed by Sheet Metal Forming Technology, described
Two cutting portions are formed by process for machining.
The torque limiter, further feature are that the torque-transfer members include external toroidal ring and inner collar
And the bolster, between the external toroidal ring and the inner collar, the external toroidal ring is fixed on described the bolster
On driving side revolving part, the inner collar is fixed on the slave end revolving part, and first cutting portion and described second is cut
Disconnected portion is located on the inner collar to the torque transmission paths of the slave end revolving part.
The torque limiter, further feature be, the inner collar have axially extending inner race section and
The inside flange portion radially radially extended, inside flange portion connect or are integrally formed with the slave end revolving part of its inner circumferential side.
The torque limiter, further feature be, first cutting portion and second place of incision in
On the inside flange portion.
The torque limiter, further feature are that have multiple arcs opening on the inside flange portion, adjacent
Linking arm same position in the radial direction between curved opening is equipped with the most narrow stress concentration portion in section, the stress
Collection middle part constitutes first cutting portion.
The torque limiter, further feature are that have to be located at first cutting on the inside flange portion
The annular groove of portion's radially inner side, the corresponding thickness thinned section of the annular groove of the inside flange portion constitute second cutting portion.
The torque limiter, further feature are that have on the linking arm and be located at first cutting portion
The slot of radially inner side, the corresponding thickness thinned section of the slot of the linking arm constitute second cutting portion.
The torque limiter, further feature are that have annular groove, the annular groove on the slave end revolving part
So that its between the inside flange portion and the junction of the slave end revolving part there are strength weak position, the intensity is thin
Weak position constitutes second cutting portion.
Due to being provided with the second cutting portion, so even the first cutting portion is not exclusively broken due to machining accuracy, the
Two cutting portions also can produce corresponding conduct, therefore the reliability of torque limiter can be enhanced.
Detailed description of the invention
The above and other features of the present invention, property and advantage will pass through retouching with reference to the accompanying drawings and examples
It states and becomes readily apparent from, in which:
Fig. 1 is the front sectional view of torque limiter in the embodiment of the present invention 1.
Fig. 2 is the right view of torque limiter in Fig. 1.
Fig. 3 A is the schematic diagram for the predeformation that torque limiter applies in Fig. 1.
The schematic diagram of cutting component fracture when Fig. 3 B is torque limiter overload in Fig. 3 A.
Fig. 4 is the schematic diagram of a variation example of embodiment 1.
Fig. 5 is the right view of torque limiter in the embodiment of the present invention 2.
Fig. 6 is the front sectional view of torque limiter in the embodiment of the present invention 3.
Specific embodiment
The invention will be further described with attached drawing combined with specific embodiments below, elaborates in the following description more
Details to facilitate a thorough understanding of the present invention, still the present invention obviously can be come with a variety of other ways different from this description it is real
It applies, those skilled in the art can make similar popularization according to practical situations without violating the connotation of the present invention, drill
It unravels silk, therefore should not be limited the scope of the invention with the content of this specific embodiment.
In the later-described embodiments, torque limiter is set to the power transfer path of automobile engine and compressor of air conditioner
On torque limiter, the downstream of wheel hub is connected with the live spindle of compressor, wheel hub and main shaft spline fitted.Belt pulley passes through
Bearing is mounted on the front end housing of compressor, there was only supporting relation between front cover, is not transmitted rotary motion.
Torque limiter is using belt pulley as driving side revolving part in the later-described embodiments, and wheel hub is as driven sidespin
Turn part.It is provided with the bolster for absorbing change in torque impact therebetween, and when occurring beyond preset value torsional impact
It is set on the cutting component or slave end revolving part of torque transmitting between cutting driving side revolving part and slave end revolving part in time
The cutting component set, cutting component are equipped with stress concentration portion position or easily pull position, occur when beyond preset value torsional impact
When, these positions are broken or pull because of unbearable impact, cause cutting component to be split into two parts, can not continue
Torque is transmitted, slave end revolving part stops operating.
Rubber, spring can be used as the material for absorbing change in torque impact in bolster.Stress concentration portion position, which can be used, to be cut
Connection ring, the material of easy brittle failure etc. that linking arm that face narrows, thickness become smaller；Easily pulling part can be fastener, friction clamp
Gripping member etc., stress concentration portion position or the chance of failure for easily pulling position, which are significantly greater than, cuts off the other positions of component.Bolster with
The positional relationship of cutting component can exchange.
Fig. 1 to Fig. 3 B shows that the embodiment of the present invention 1, Fig. 4 show a variation example of embodiment 1, and Fig. 5, Fig. 6 divide
Two other embodiments are not shown on the basis of Fig. 1 to Fig. 3 B.It should be noted that these and subsequent others are attached
Figure, and should not be in this, as to of the invention practical only as an example, it is drawn according to the condition of equal proportion
It is required that protection scope be construed as limiting.
Embodiment 1
As shown in Figure 1 and Figure 2, main shaft 3 is rotatably mounted with by bearing 2 in compressor front cover 1, passes through axis outside front cover 1
It holds 2 and is pivotably supported belt pulley 40.One bolster 41 is connect by the rivet 42 of periphery with belt pulley 40, and bolster 41 includes
External toroidal ring 43, inner collar 44, the rubber 39 being filled between two rings 43,44.External toroidal ring 43 has axially extending housing
The outside flange portion 432 of portion 431 and the outside flange portion 432 to extend radially outwardly, external toroidal ring 43 is equipped with rivet hole 43A.Inner collar 44
With axially extending inner race section 441 and the inside flange portion 442 extended radially inwardly, the wheel of inside flange portion 442 and its inner circumferential side
One is fixed or be directly prepared into hub 50 by the modes such as welding, being threadedly coupled.Spline 51 is opened up on the inside of wheel hub 50, with main shaft 3
On spline cooperation, and be connected and fixed with main shaft 51.
Some materials are removed on the inside flange portion 442 of inner collar 44, the elongated opening 44A of multiple arcs is formed, goes
The mode removed can be punching press, and linking arm 45 is formed between two adjacent opening 44A, and each linking arm 45 is in the radial direction
Same position is equipped with the most narrow stress concentration portion position in a section, constitutes the first cutting portion 45A.Inside flange portion 442 is connecting
Annular groove 46 is cut out in the plane of the radially inner side of arm 45, so that the thickness at the position is sharply thinning, the thinning part
Constitute the second cutting portion 46A.The design breakaway torque Q1 of first cutting portion 45A can be set smaller than the second cutting portion 46A's
Design breakaway torque Q2.Near the settable position joined with wheel hub 50 second cutting portion 46A.
Since the sectional area being stamped and formed out has that size is unstable, and machining has advantage with high accuracy,
Therefore, when torque reaches Q1 but the first cutting portion 45A is cut off by non-expectability, the second cutting portion 46A is generated when reaching Q2
Effect.Furthermore since linking arm 45 can permit certain radial extent, even if it occurs to break in time when torque reaches Q1
It is bad, it is also possible to continued transmission effect after being elongated, can not instantaneous trip, the second cutting portion 46A can also generate effect at this time.
Therefore, the second cutting portion 46A due to the mode of failure it is different from the first cutting portion 45A, make torque limiter effect
It is protected.
First cutting portion 45 or the second cutting portion 46A generate fracture when disconnecting, to avoid scraping between fracture, such as Fig. 3 A
Shown, the first cutting portion 45 of torque limiter or the second cutting portion 46A are axial (axial to the left or to the right when assembly
With, in figure be it is axial to the left) first generate predeformation, about 0.7~3mm, predeformation amount is greater than the fracture position of the first cutting portion 45
The thickness set, after workpiece is cut off, as shown in Figure 3B, the component axial retraction on the outside of fracture, so that fracture 461,462 exists
Axially it is kept completely separate.
Fig. 4 shows a variation example of embodiment 1, as shown in figure 4, to be processed into section V-shaped for annular groove 46, is easier to
In the second cutting portion 46A for generating concentrated stress.It will be appreciated that the cross sectional shape of annular groove 46 is not limited to V-arrangement or Fig. 3 A
In rectangle, can also be other it is any be suitable for reach limit torque when make the second cutting portion 46A be broken shape.
Embodiment 2
The present embodiment continues to use the element numbers and partial content of previous embodiment, wherein adopting the phase that is denoted by the same reference numerals
Same or approximate element, and the explanation of same technique content is selectively omitted.Explanation about clipped can refer to
Previous embodiment 1, it is no longer repeated for the present embodiment.
Some materials are removed on the inside flange portion 442 of inner collar 44, the elongated opening 44A of multiple arcs is formed, goes
The mode removed can be punching press, and linking arm 45 is formed between two adjacent opening 44A, and each linking arm 45 is in the radial direction
Same position is equipped with the most narrow stress concentration portion position in a section, constitutes the first cutting portion 45A.First on linking arm 45
The radially inner side of cutting portion 45A cuts out slot 47, so that the portion that the thickness at the position with slot 47 is sharply thinning, thinning
Divide and constitutes the second cutting portion 46A.The design breakaway torque Q1 of first cutting portion 45A can be set smaller than the second cutting portion 46A
Design breakaway torque Q2.
Since the sectional area being stamped and formed out has that size is unstable, and machining has advantage with high accuracy,
Therefore, when torque reaches Q1 but the first cutting portion 45A is cut off by non-expectability, the second cutting portion 46A is generated when reaching Q2
Effect.Furthermore since linking arm 45 can permit certain radial extent, even if it occurs to break in time when torque reaches Q1
It is bad, it is also possible to continued transmission effect after being elongated, can not instantaneous trip, the second cutting portion 46A can also generate effect at this time.
Therefore, the second cutting portion 46A due to the mode of failure it is different from the first cutting portion 45A, make torque limiter effect
It is protected.
First cutting portion 45 or the second cutting portion 46A generate fracture when disconnecting, to avoid scraping between fracture, such as Fig. 3 A
Shown, the first cutting portion 45 (axial to be ok to the left or to the right, be in figure axial to the left) of torque limiter is first when assembly
Predeformation, about 0.7~3mm are generated, predeformation amount is greater than the thickness of the fracture site of the first cutting portion 45, cuts off in workpiece
Afterwards, the component axial retraction on the outside of fracture, so that fracture is kept completely separate axially.
Slot 47 can be the arcuate shape with the opening concyclic heart of 44A.The shape of the radial section of slot 47 can be rectangle or V
Shape or other any shapes for being suitable for being broken the second cutting portion 46A when reaching and limiting torque.
Embodiment 3
The present embodiment continues to use the element numbers and partial content of previous embodiment, wherein adopting the phase that is denoted by the same reference numerals
Same or approximate element, and the explanation of same technique content is selectively omitted.Explanation about clipped can refer to
Previous embodiment 1, it is no longer repeated for the present embodiment.
Some materials are removed on the inside flange portion 442 of inner collar 44, the elongated opening 44A of multiple arcs is formed, goes
The mode removed can be punching press, and linking arm 45 is formed between two adjacent opening 44A, and each linking arm 45 is in the radial direction
Same position is equipped with the most narrow stress concentration portion position in a section, constitutes the first cutting portion 45A.As shown in Figure 6 in wheel hub 50
The annular groove 48 formed on outer peripheral surface, inner circumferential and the wheel hub 50 of the inside flange portion 442 for being positioned adjacent to inner collar 44 of annular groove 48
Junction can be broken, the weakness that dotted line position is shown since annular groove 48 makes inclined dotted line position become weak part
Position constitutes the second cutting portion 46A.The design breakaway torque Q1 of first cutting portion 45A can be set smaller than the second cutting portion
The design breakaway torque Q2 of 46A.
Since the sectional area being stamped and formed out has that size is unstable, and machining has advantage with high accuracy,
Therefore, when torque reaches Q1 but the first cutting portion 45A is cut off by non-expectability, the second cutting portion 46A is generated when reaching Q2
Effect.Furthermore since linking arm 45 can permit certain radial extent, even if it occurs to break in time when torque reaches Q1
It is bad, it is also possible to continued transmission effect after being elongated, can not instantaneous trip, the second cutting portion 46A can also generate effect at this time.
Therefore, the second cutting portion 46A due to the mode of failure it is different from the first cutting portion 45A, make torque limiter effect
It is protected.
First cutting portion 45 or the second cutting portion 46A generate fracture when disconnecting, to avoid scraping between fracture, when assembly
First cutting portion 45 of torque limiter first generates pre- in axial (axial to be ok to the left or to the right, be in figure axial to the left)
Deformation, about 0.7~3mm, predeformation amount is greater than the thickness of the fracture site of the first cutting portion 45, after workpiece is cut off, breaks
Component axial retraction on the outside of mouthful, so that fracture is kept completely separate axially.
Annular groove 48 is processed into that section is V-shaped, obtains the second cutting portion 46A for more easily producing concentrated stress.It is understood that
To, the cross sectional shape of annular groove 48 is not limited to V-arrangement or rectangle, can also be other it is any be suitable for reach limit torque when
The shape for being broken the second cutting portion 46A.
In addition, the present embodiment can also be formed in annular groove 48 inner peripheral surface of 50 corresponding position of wheel hub, it can reach similar
The effect of torque is cut off, but annular groove cutting difficulty herein is slightly larger than being located at outer peripheral surface.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any modification to the above embodiments, equivalent variations
And modification, it each falls within the protection scope that the claims in the present invention are defined.
Claims (10)
1. a kind of torque limiter, comprising: driving side revolving part, slave end revolving part and setting driving side revolving part and from
Torque-transfer members between dynamic side revolving part；The torque-transfer members include with absorb change in torque impact bolster and
The first cutting portion that can be cut off in overload, which is characterized in that the torque-transfer members further include in first cutting portion
The second cutting portion that can be cut off in overload that radially inner side is equipped with.
2. torque limiter as described in claim 1, which is characterized in that the processing technology precision of first cutting portion is lower than
The processing technology precision of second cutting portion, the design breakaway torque of first cutting portion are set smaller than described second and cut
The design breakaway torque in disconnected portion.
3. torque limiter as described in claim 1, which is characterized in that first cutting portion is formed by Sheet Metal Forming Technology, institute
The second cutting portion is stated to be formed by process for machining.
4. torque limiter as described in claim 1, which is characterized in that the torque-transfer members include external toroidal ring and inner ring
Circle and the bolster, for the bolster between the external toroidal ring and the inner collar, the external toroidal ring is fixed on institute
It states on driving side revolving part, the inner collar is fixed on the slave end revolving part, first cutting portion and described second
Place of incision is in the torque transmission paths of the inner collar to the slave end revolving part.
5. torque limiter as claimed in claim 4, which is characterized in that the inner collar have axially extending inner race section with
And the inside flange portion radially radially extended, inside flange portion connect with the slave end revolving part of its inner circumferential side or become one
Body.
6. torque limiter as claimed in claim 5, which is characterized in that first cutting portion and second place of incision
In on the inside flange portion.
7. torque limiter as claimed in claim 5, which is characterized in that there is multiple arcs opening on the inside flange portion,
Linking arm same position in the radial direction between adjacent curved opening is equipped with the most narrow stress concentration portion in section, described
Stress concentration portion constitutes first cutting portion.
8. torque limiter as claimed in claim 7, which is characterized in that have on the inside flange portion and cut positioned at described first
The annular groove of disconnected portion's radially inner side, the corresponding thickness thinned section of the annular groove of the inside flange portion constitute second cutting
Portion.
9. torque limiter as claimed in claim 7, which is characterized in that have on the linking arm and be located at first cutting
The slot of portion's radially inner side, the corresponding thickness thinned section of the slot of the linking arm constitute second cutting portion.
10. torque limiter as claimed in claim 7, which is characterized in that there is annular groove on the slave end revolving part, it is described
Annular groove makes it, and there are strength weak positions between the inside flange portion and the junction of the slave end revolving part, described strong
It spends weak part and constitutes second cutting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835413.1A CN105782284B (en) | 2014-12-23 | 2014-12-23 | Torque limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835413.1A CN105782284B (en) | 2014-12-23 | 2014-12-23 | Torque limiter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105782284A CN105782284A (en) | 2016-07-20 |
| CN105782284B true CN105782284B (en) | 2019-08-23 |
Family
ID=56389717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410835413.1A Expired - Fee Related CN105782284B (en) | 2014-12-23 | 2014-12-23 | Torque limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105782284B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004009965A1 (en) * | 2003-03-03 | 2004-09-30 | Denso Corp., Kariya | Torque-transfer device |
| CN1670404A (en) * | 2004-03-18 | 2005-09-21 | 汉拏空调株式会社 | Power transmitting device of clutchless compressor |
| EP1719929A4 (en) * | 2004-02-10 | 2009-07-01 | Valeo Thermal Sys Japan Co | Torque transmission device of compressor |
| JP5021988B2 (en) * | 2006-09-06 | 2012-09-12 | サンデン株式会社 | Power transmission device |
| CN102678531A (en) * | 2011-03-17 | 2012-09-19 | 德尔福技术有限公司 | Air conditioning compressor over-torque protector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006200570A (en) * | 2005-01-18 | 2006-08-03 | Sanden Corp | Electromagnetic clutch |
-
2014
- 2014-12-23 CN CN201410835413.1A patent/CN105782284B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004009965A1 (en) * | 2003-03-03 | 2004-09-30 | Denso Corp., Kariya | Torque-transfer device |
| EP1719929A4 (en) * | 2004-02-10 | 2009-07-01 | Valeo Thermal Sys Japan Co | Torque transmission device of compressor |
| CN1670404A (en) * | 2004-03-18 | 2005-09-21 | 汉拏空调株式会社 | Power transmitting device of clutchless compressor |
| JP5021988B2 (en) * | 2006-09-06 | 2012-09-12 | サンデン株式会社 | Power transmission device |
| CN102678531A (en) * | 2011-03-17 | 2012-09-19 | 德尔福技术有限公司 | Air conditioning compressor over-torque protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105782284A (en) | 2016-07-20 |
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Granted publication date: 20190823 Termination date: 20191223 |