CN105782284A - Torque restrictor - Google Patents
Torque restrictor Download PDFInfo
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- CN105782284A CN105782284A CN201410835413.1A CN201410835413A CN105782284A CN 105782284 A CN105782284 A CN 105782284A CN 201410835413 A CN201410835413 A CN 201410835413A CN 105782284 A CN105782284 A CN 105782284A
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- cutting portion
- torque
- torque limiter
- revolving part
- slave end
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Abstract
The object of the invention is to provide a torque restrictor. According to the torque restrictor, the reliability of torque restriction is enhanced. The torque restrictor provided for achieving the object is provided with a driving side rotation part, a driven side rotation part and a torque transmission component which is arranged between the driving side rotation part and the driven side rotation part. The torque transmission component comprises a buffering part and a first cut-off part. The buffering part has the function for absorbing torque change impact, and the first cut-off part can be cut off during overload. The torque restrictor has the characteristic that the torque transmission component further comprises a second cut-off part arranged on the inner side of the radial direction of the first cut-off part.
Description
Technical field
The present invention relates to the torque limiter limiting transmission moment of torsion in actuating unit, to avoid load to transship, particularly relate to the torque limiter of the driving side of compressor used for automobile air conditioning.
Background technology
Torque limiter has the occasion of many application, for instance be located at the power transfer path of automobile engine and the compressor regulated for air.Typical outer control variable displacement compressor has a swash plate being supported on main shaft obliquely, and swash plate angle can be changed by the electrically-controlled valve of compressor.When the inside of outer control variable displacement compressor break down make moment of torsion become big time, electromotor can be produced big impact by excessive moment of torsion.Therefore, compressor must have overload protecting mechanism so that when moment of torsion within compressor is excessive, and compressor departs from belt pulley, it is to avoid the excessive impact to electromotor of compressor internal torque.
The patent No. be US7850558, name be called the american documentation literature of " compressor power transfer device " disclose a kind of can the torque limiter of rupture failure, threaded between the pars intermedia of limited section with wheel hub outer shroud, outer member is connected with bolster, is neck between pars intermedia and outer member.When the moment of torsion transmitted is excessive, neck will rupture so that is separated from each other between pars intermedia and outer member.Now, even if the belt pulley that outer member connects continues to rotate, wheel hub cannot also be delivered torque to.Power between belt pulley and wheel hub is transmitted and cuts off by torque limiter, it is prevented that excessive moment of torsion causes the damage of compressor inner body.
Technique scheme there is the problem that neck can adopt punch forming to may be used without powder metallurgy process and make, as adopted process for stamping, owing to punching precision is low, and neck otch has fracture belt and compressive zone, the size of fracture belt is unstable, and material punching press after-hardening degree is also inconsistent, and mould requires height, so causing that the breakaway torque of torque limiter is unstable, precision is difficult to ensure that.As adopted powder metallurgy, then the intensity of material and grinding tool required precision is higher, it is necessary to trial material prescription repeatedly and technological parameter.
Summary of the invention
It is an object of the invention to provide a kind of torque limiter, which increase the reliability limiting moment of torsion.
For realizing the torque limiter of described purpose, there is driving side revolving part, slave end revolving part and be arranged on the torque-transfer members between driving side revolving part and slave end revolving part；This torque-transfer members includes the first cutting portion having the bolster absorbing change in torque impact and cutting off when overload, is characterized in, this torque-transfer members is additionally included in the second cutting portion that the radially inner side of described first cutting portion is provided with.
Described torque limiter, its further feature is, the processing technique precision of described first cutting portion is lower than the processing technique precision of described second cutting portion, and the design breakaway torque of described first cutting portion is set smaller than the design breakaway torque of described second cutting portion.
Described torque limiter, its further feature is, described first cutting portion is formed by Sheet Metal Forming Technology, and described second cutting portion is formed by process for machining.
Described torque limiter, its further feature is, described torque-transfer members includes external toroidal ring and inner collar and described bolster, described bolster is between described external toroidal ring and described inner collar, described external toroidal ring is fixed on described driving side revolving part, described inner collar is fixed on described slave end revolving part, and described first cutting portion and described second place of incision are in the torque transmission paths of described inner collar to described slave end revolving part.
Described torque limiter, its further feature is, described inner collar has axially extended inner race section and the inside flange portion radially radially extended, and inside flange portion is connected with the described slave end revolving part of its inner circumferential side or is integrally forming.
Described torque limiter, its further feature is, described first cutting portion and described second place of incision are on described inside flange portion.
Described torque limiter, its further feature is, having multiple arc opening on described inside flange portion, the same position diametrically of the linking arm between adjacent arc opening is equipped with a stress concentration portion that cross section is the narrowest, and described stress concentration portion constitutes described first cutting portion.
Described torque limiter, its further feature is, described inside flange portion has the annular groove being positioned at described first cutting portion radially inner side, and the lower thickness part that the described annular groove of described inside flange portion is corresponding constitutes described second cutting portion.
Described torque limiter, its further feature is, described linking arm has the groove being positioned at described first cutting portion radially inner side, and the lower thickness part that the described groove of described linking arm is corresponding constitutes described second cutting portion.
Described torque limiter, its further feature is, having annular groove on described slave end revolving part, described annular groove makes to exist between itself and the junction of described inside flange portion and described slave end revolving part strength weak position, and described strength weak position constitutes described second cutting portion.
Owing to being provided with the second cutting portion, so even the first cutting portion not exclusively ruptures due to machining accuracy reason, the second cutting portion can also produce corresponding conduct, therefore can strengthen the reliability of torque limiter.
Accompanying drawing explanation
The above and other features of the present invention, character and advantage will be become readily apparent from by the description below in conjunction with drawings and Examples, wherein:
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 of the predeformation that torque limiter applies in Fig. 1.
Fig. 3 B cuts off the schematic diagram of component fracture when being torque limiter overload in Fig. 3 A.
Fig. 4 is the schematic diagram of a modified 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.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the invention will be further described; elaborate more details in the following description so that fully understanding the present invention; but the present invention obviously can implement with the multiple alternate manner being different from this description; those skilled in the art can do similar popularization, deduction according to practical situations when without prejudice to intension of the present invention, therefore should with content constraints protection scope of the present invention of this specific embodiment.
In embodiment described later, torque limiter is arranged at automobile engine and the torque limiter in the power transfer path of compressor of air conditioner, and the downstream of wheel hub is connected with the rotation main shaft of compressor, wheel hub and main shaft spline fitted.Belt pulley is arranged on the front end housing of compressor by bearing, and only has supporting relation between protecgulum, does not transmit rotary motion.
In embodiment described later, torque limiter adopts belt pulley as driving side revolving part, and wheel hub is as slave end revolving part.It is provided with between and absorbs the bolster that change in torque is impacted, and the cut-out component of moment of torsion transmission between driving side revolving part and slave end revolving part is cut off in time when occurring beyond preset value torsional impact, or the cut-out component arranged on slave end revolving part, cut off component be provided with stress concentration portion position or easily pull position, when occurring beyond preset value torsional impact, rupture because withstanding shocks or pull in these positions, cause that cutting off component is split into two parts, cannot continuing transmission moment of torsion, slave end revolving part stops operating.
Bolster can adopt rubber, spring as absorbing the material that change in torque is impacted.Stress concentration portion position can adopt the material etc. connecting ring, easy brittle failure that the linking arm of narrowed cross section, thickness diminish；Easily pulling part can be fastener, friction clamp gripping member etc., stress concentration portion position or easily pull the chance of failure at position and be significantly greater than cut-out other position of component.Bolster and the position relationship cutting off component can be exchanged.
Fig. 1 to Fig. 3 B shows that embodiments of the invention 1, Fig. 4 show a modified example of embodiment 1, and Fig. 5, Fig. 6 show other two embodiment respectively on the basis of Fig. 1 to Fig. 3 B.It should be noted that these and other accompanying drawing follow-up are all only used as example, it is not what to draw according to the condition of equal proportion, and should not be construed as limiting in this, as to the protection domain of actual requirement of the present invention.
Embodiment 1
As shown in Figure 1 and Figure 2, being rotatably mounted with main shaft 3 by bearing 2 in compressor front cover 1, protecgulum 1 is outer is pivotably supported belt pulley 40 by bearing 2.One bolster 41 is connected with belt pulley 40 by the rivet 42 of periphery, and bolster 41 includes external toroidal ring 43, inner collar 44, is filled in the rubber 39 between two rings 43,44.External toroidal ring 43 has axially extended outer race section 431 and the outside flange portion 432 extended radially outwardly, and the outside flange portion 432 of external toroidal ring 43 is provided with rivet hole 43A.Inner collar 44 has axially extended inner race section 441 and the inside flange portion 442 extended radially inwardly, inside flange portion 442 with the wheel hub 50 of its inner circumferential side by welding, the mode such as threaded fixes or is directly prepared into integrally.Offer spline 51 inside wheel hub 50, coordinate with the spline on main shaft 3, and be connected with main shaft 51 fixing.
The inside flange portion 442 of inner collar 44 is removed portion of material, form the elongated opening 44A of multiple arc, the mode removed can be punching press, linking arm 45 is formed between two adjacent opening 44A, each linking arm 45 same position diametrically is equipped with the narrowest stress concentration portion position, a cross section, constitutes the first cutting portion 45A.Inside flange portion 442 cuts out annular groove 46 in the plane of the radially inner side of linking arm 45 so that the thickness at this position is sharply thinning, and this thinning part constitutes the second cutting portion 46A.The design breakaway torque Q1 of the first cutting portion 45A can be set smaller than the design breakaway torque Q2 of the second cutting portion 46A.Second cutting portion 46A can be arranged near the position joined with wheel hub 50.
There is the problem that size is unstable in the sectional area owing to being stamped and formed out, and machining has the advantage that precision is high, therefore, when when moment of torsion reaches Q1 but the first cutting portion 45A cuts off by non-expectability, reaches the second cutting portion 46A and generation effect during Q2.Furthermore, owing to linking arm 45 can allow certain radial extent, even if it occurs to destroy in time when moment of torsion reaches Q1, it is also possible to having continued gearing after being elongated, it is impossible to instantaneous trip, now the second cutting portion 46A also can produce effect.
Therefore, the second cutting portion 46A is different from the first cutting portion 45A due to the mode lost efficacy, and makes torque limiter effect be protected.
First cutting portion 45 or the second cutting portion 46A produce fracture when disconnecting, for avoiding swiping between fracture, as shown in Figure 3A, during assembling, the first cutting portion 45 of torque limiter or the second cutting portion 46A axially (axially to the left or to the right can, in the drawings for axially to the left) first produce predeformation, about 0.7～3mm, predeformation amount is more than the thickness of the fracture site of the first cutting portion 45, after workpiece cuts off, as shown in Figure 3 B, component axial retraction outside fracture so that fracture 461,462 is axially being kept completely separate.
Fig. 4 illustrates a modified example of embodiment 1, and as shown in Figure 4, it is V-shaped that annular groove 46 is processed into cross section, obtains more easily producing the second cutting portion 46A of concentrated stress.It will be appreciated that the cross sectional shape of annular groove 46 is not limited to the rectangle in V-arrangement or Fig. 3 A, it is also possible to be other any be suitable for reach limit moment of torsion time make second cutting portion 46A fracture shape.
Embodiment 2
The present embodiment continues to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and optionally eliminates the explanation of constructed content.Explanation about clipped can refer to previous embodiment 1, and it is no longer repeated for the present embodiment.
The inside flange portion 442 of inner collar 44 is removed portion of material, form the elongated opening 44A of multiple arc, the mode removed can be punching press, linking arm 45 is formed between two adjacent opening 44A, each linking arm 45 same position diametrically is equipped with the narrowest stress concentration portion position, a cross section, constitutes the first cutting portion 45A.The radially inner side of the first cutting portion 45A on linking arm 45 cuts out groove 47 so that the thickness at the position with groove 47 is sharply thinning, and this thinning part constitutes the second cutting portion 46A.The design breakaway torque Q1 of the first cutting portion 45A can be set smaller than the design breakaway torque Q2 of the second cutting portion 46A.
There is the problem that size is unstable in the sectional area owing to being stamped and formed out, and machining has the advantage that precision is high, therefore, when when moment of torsion reaches Q1 but the first cutting portion 45A cuts off by non-expectability, reaches the second cutting portion 46A and generation effect during Q2.Furthermore, owing to linking arm 45 can allow certain radial extent, even if it occurs to destroy in time when moment of torsion reaches Q1, it is also possible to having continued gearing after being elongated, it is impossible to instantaneous trip, now the second cutting portion 46A also can produce effect.
Therefore, the second cutting portion 46A is different from the first cutting portion 45A due to the mode lost efficacy, and makes torque limiter effect be protected.
First cutting portion 45 or the second cutting portion 46A produce fracture when disconnecting, for avoiding swiping between fracture, as shown in Figure 3A, during assembling, first cutting portion 45 (axially to the left or to the right can, in the drawings for axially to the left) of torque limiter first produces predeformation, about 0.7～3mm, predeformation amount is more than the thickness of the fracture site of the first cutting portion 45, component axial retraction after workpiece cuts off, outside fracture so that fracture is axially being kept completely separate.
Groove 47 can be and the arcuate shape of the concyclic heart of opening 44A.The shape of the radial direction section of groove 47 can be rectangle or V-arrangement, or other any be suitable for reach limit moment of torsion time make second cutting portion 46A fracture shape.
Embodiment 3
The present embodiment continues to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and optionally eliminates the explanation of constructed content.Explanation about clipped can refer to previous embodiment 1, and it is no longer repeated for the present embodiment.
The inside flange portion 442 of inner collar 44 is removed portion of material, form the elongated opening 44A of multiple arc, the mode removed can be punching press, linking arm 45 is formed between two adjacent opening 44A, each linking arm 45 same position diametrically is equipped with the narrowest stress concentration portion position, a cross section, constitutes the first cutting portion 45A.The annular groove 48 formed on wheel hub 50 outer peripheral face as shown in Figure 6, the inner circumferential of the inside flange portion 442 being positioned adjacent to inner collar 44 of annular groove 48 and the junction of wheel hub 50, owing to annular groove 48 makes the dotted line position tilted become weak part, can rupturing, the weak part that dotted line position shows constitutes the second cutting portion 46A.The design breakaway torque Q1 of the first cutting portion 45A can be set smaller than the design breakaway torque Q2 of the second cutting portion 46A.
There is the problem that size is unstable in the sectional area owing to being stamped and formed out, and machining has the advantage that precision is high, therefore, when when moment of torsion reaches Q1 but the first cutting portion 45A cuts off by non-expectability, reaches the second cutting portion 46A and generation effect during Q2.Furthermore, owing to linking arm 45 can allow certain radial extent, even if it occurs to destroy in time when moment of torsion reaches Q1, it is also possible to having continued gearing after being elongated, it is impossible to instantaneous trip, now the second cutting portion 46A also can produce effect.
Therefore, the second cutting portion 46A is different from the first cutting portion 45A due to the mode lost efficacy, and makes torque limiter effect be protected.
First cutting portion 45 or the second cutting portion 46A produce fracture when disconnecting, for avoiding swiping between fracture, during assembling, the first cutting portion 45 of torque limiter axially (axially to the left or to the right can, in the drawings for axially to the left) first produce predeformation, about 0.7～3mm, predeformation amount is more than the thickness of the fracture site of the first cutting portion 45, after workpiece cuts off, component axial retraction outside fracture so that fracture is axially being kept completely separate.
It is V-shaped that annular groove 48 is processed into cross section, obtains more easily producing the second cutting portion 46A of concentrated stress.It will be appreciated that the cross sectional shape of annular groove 48 is not limited to V-arrangement or rectangle, it is also possible to be other any be suitable for reach limit moment of torsion time make second cutting portion 46A fracture shape.
Additionally, the present embodiment can also be formed at annular groove 48 inner peripheral surface of wheel hub 50 correspondence position, the close effect cutting off moment of torsion can be reached, but annular groove cutting difficulty herein is slightly larger than being located at outer peripheral face.
Although the present invention is with preferred embodiment openly as above, but it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and amendment.Therefore, every content without departing from technical solution of the present invention, according to any amendment, equivalent variations and modification that above example is made by the technical spirit of the present invention, each fall within the protection domain that the claims in the present invention define.
Claims (10)
1. a torque limiter, has: driving side revolving part, slave end revolving part and be arranged on the torque-transfer members between driving side revolving part and slave end revolving part；This torque-transfer members includes the first cutting portion having the bolster absorbing change in torque impact and cutting off when overload, it is characterised in that this torque-transfer members is additionally included in the second cutting portion that the radially inner side of described first cutting portion is provided with.
2. torque limiter as claimed in claim 1, it is characterized in that, the processing technique precision of described first cutting portion is lower than the processing technique precision of described second cutting portion, and the design breakaway torque of described first cutting portion is set smaller than the design breakaway torque of described second cutting portion.
3. torque limiter as claimed in claim 1, it is characterised in that described first cutting portion is formed by Sheet Metal Forming Technology, and described second cutting portion is formed by process for machining.
4. torque limiter as claimed in claim 1, it is characterized in that, described torque-transfer members includes external toroidal ring and inner collar and described bolster, described bolster is between described external toroidal ring and described inner collar, described external toroidal ring is fixed on described driving side revolving part, described inner collar is fixed on described slave end revolving part, and described first cutting portion and described second place of incision are in the torque transmission paths of described inner collar to described slave end revolving part.
5. torque limiter as claimed in claim 4, it is characterised in that described inner collar has axially extended inner race section and the inside flange portion radially radially extended, and inside flange portion is connected with the described slave end revolving part of its inner circumferential side or is integrally forming.
6. torque limiter as claimed in claim 5, it is characterised in that described first cutting portion and described second place of incision are on described inside flange portion.
7. torque limiter as claimed in claim 5, it is characterized in that, having multiple arc opening on described inside flange portion, the same position diametrically of the linking arm between adjacent arc opening is equipped with a stress concentration portion that cross section is the narrowest, and described stress concentration portion constitutes described first cutting portion.
8. torque limiter as claimed in claim 7, it is characterised in that have the annular groove being positioned at described first cutting portion radially inner side on described inside flange portion, the lower thickness part that the described annular groove of described inside flange portion is corresponding constitutes described second cutting portion.
9. torque limiter as claimed in claim 7, it is characterised in that have the groove being positioned at described first cutting portion radially inner side on described linking arm, the lower thickness part that the described groove of described linking arm is corresponding constitutes described second cutting portion.
10. torque limiter as claimed in claim 7, it is characterized in that, having annular groove on described slave end revolving part, described annular groove makes to exist between itself and the junction of described inside flange portion and described slave end revolving part strength weak position, and described strength weak position constitutes described 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 true CN105782284A (en) | 2016-07-20 |
| CN105782284B CN105782284B (en) | 2019-08-23 |
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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 |
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| Country | Link |
|---|---|
| CN (1) | CN105782284B (en) |
Citations (6)
| 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 |
| US20060157314A1 (en) * | 2005-01-18 | 2006-07-20 | Kiyokazu Yamamoto | Electromagnetic Clutch |
| 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 |
-
2014
- 2014-12-23 CN CN201410835413.1A patent/CN105782284B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| US20060157314A1 (en) * | 2005-01-18 | 2006-07-20 | Kiyokazu Yamamoto | Electromagnetic Clutch |
| 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 |
|---|---|
| CN105782284B (en) | 2019-08-23 |
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Granted publication date: 20190823 Termination date: 20191223 |