CN202746515U - Belt tightener - Google Patents
Belt tightener Download PDFInfo
- Publication number
- CN202746515U CN202746515U CN 201220283042 CN201220283042U CN202746515U CN 202746515 U CN202746515 U CN 202746515U CN 201220283042 CN201220283042 CN 201220283042 CN 201220283042 U CN201220283042 U CN 201220283042U CN 202746515 U CN202746515 U CN 202746515U
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- CN
- China
- Prior art keywords
- via hole
- belt tightener
- axle sleeve
- accessory
- pedestal
- 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
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Abstract
The utility model discloses a belt tightener installed on an accessory bracket to tighten a belt. The belt tightener comprises a frame body with a first via hole, a tightening wheel connected with the frame body through a bearing, a base with a second via hole, and a step shaft sleeve with a main section and an auxiliary section. The main section is threaded in the first via hole. The auxiliary section is threaded in the second via hole by way of interference fit. The step ring surface of the shaft sleeve leans against the top face of the base. The bottom face of the base leans against the accessory bracket. A gap is arranged between the tail end face of the shaft sleeve toward the accessory bracket and the accessory bracket. A gap is reserved between the end face of the shaft sleeve and an accessory installation bracket in the belt tightener to ensure the contact area of the base of the tightener and the accessory instillation bracket, disperse the alternate shear stress borne by a fixed bolt in the diameter direction and the stress on the combined face between the base and the accessory installation bracket, and prevent the bolt from loosening due to abnormal decrease of bolt torque. And meanwhile, the probability of fatigue break of the bolt is reduced.
Description
Technical field
The utility model relates to a kind of belt tightener, relates in particular to a kind of belt tightener for the motor car engine accessory wheel system.
Background technique
In the motor car engine accessory wheel system, the accessory wheel system that is driven by crank pulley is common functional structure.In train, rely on poly Vbelt that a part of moment of torsion of bent axle output is delivered on the equipment such as generator, power assistance pump for steering and air condition compressor, for the said equipment provides power, the assurance corresponding system is normally realized its function.In train, usually use belt tightener, when different bent axle moment of torsion output, guarantee that the tension force of belt is in effective coverage.Existing belt tightener mainly comprises wheel body, rolling bearing, support body, torsion spring, axle sleeve, pedestal etc.
Existing belt tightener needs to guarantee that the little end surface of axle sleeve is concordant with the base end face, and in Idle wheel processing, namely axle sleeve press-fits in the process, by Equipment Inspection, when the axle sleeve microcephaly is concordant with the base lower end surface, stops to press-fit.All higher to the requirement of technical face and quality monitoring like this.Be not easy the conformity that guarantees that part press-fits.
Existing belt tightener is after several dynamic circulation, pedestal axially moving up along axle sleeve might appear, the axle sleeve microcephaly occurs protrude the situation of base bottom surface, so that produce the gap between pedestal and the accessory mount, thereby reduce bonded area, be unfavorable for the stress that disperses junction plane place axle sleeve and bolt to bear, the stress that the moment of flexure that belt produces the construction bolt of stretcher causes concentrates on bolt and accessory mount joint, causes easily bolt fracture.
When Idle wheel assembled, behind the bolt-locking, the power that axially fastens was delivered to accessory mount by axle sleeve and pedestal, the elastic force of the combination force+spring deformation of the combination force between pedestal and the accessory mount=axle sleeve microcephaly and pedestal.And the pressure between accessory mount and the axle sleeve microcephaly is the clamping force of bolt, combination force than base is large, therefore between base and the suffered holding power of axle sleeve microcephaly, there is a pressure difference, in the vibration of some pulsation and through after several stress cycle, may occur moving on the base, show the situation that the axle sleeve microcephaly is protruded.Bonded area between stretcher and the accessory mount (annex mounting bracket) reduces at this moment, the stress of radial pressure between stretcher and accessory mount may be occurred and whole junction plane can not be effectively be distributed to, stress occurs easily and concentrate, thereby cause bolt fracture.
The model utility content
Not enough for prior art, thus the technical problems to be solved in the utility model provides a kind of effective dispersive stress and moment of flexure prevents connecting bolt fracture, the belt tightener that prolongs its working life.
In order to overcome the prior art deficiency, the technical solution adopted in the utility model is: a kind of belt tightener, be installed on accessory mount belt is carried out tensioning, described belt tightener comprises the support body with first via hole, the Idle wheel that is connected with described support body by bearing, pedestal with second via hole, ladder-type axle sleeve with principal piece and attached section, described principal piece is arranged in described the first via hole, be arranged in to described attached section interference fit described the second via hole, the ladder anchor ring of described axle sleeve presses on the end face of described pedestal, the bottom surface of described pedestal and described accessory mount butt, described axle sleeve has the gap between the distal end faces of described accessory mount and described accessory mount.
As the improvement of the technological scheme of the utility model belt tightener, described attached section length is less than the end face of described pedestal and the distance between the bottom surface.
Improvement as the technological scheme of the utility model belt tightener, described accessory mount is provided with counterbore, attached section terminal part of described axle sleeve stretch into described counterbore and with described counterbore transition fit, described attached section distal end faces and the bottom surface of described counterbore have the gap.
As the improvement of the technological scheme of the utility model belt tightener, described support body is provided with annular groove, is provided with spring in the described annular groove, described spring and described support body and the equal butt of described pedestal.
The beneficial effects of the utility model are: leave the gap between the end face of shaft bush in the belt tightener and the annex mounting bracket, guarantee the area of contact of stretcher pedestal and motor adversary part-annex mounting bracket, the stress at junction plane place between the diametric alternation shearing stress that the dispersion fixing bolt bears and pedestal and the annex mounting bracket, preventing that bolt torque is unusual descends and become flexible, reduces simultaneously the probability that fatigue occurs bolt.
Description of drawings
Fig. 1 is a kind of embodiment's of the utility model belt tightener cross section structure schematic representation.
Fig. 2 is the another kind of embodiment's of the utility model belt tightener cross section structure schematic representation.
Embodiment
The below specifically describes mode of execution of the present utility model.
With reference to figure 1, shown in Figure 2, a kind of belt tightener of the utility model is exerted pressure and is made belt tension thereby the rotary pressure that it can be installed on accessory mount 50 and the Idle wheel by wherein and torsion spring by bolt 28 carries out side direction to belt.Accessory mount 50 is the annex mounting bracket, is used for installing the annexes such as belt tightener.Described belt tightener comprises the support body 10 with first via hole 11, the Idle wheel 16 that is connected with described support body 10 by bearing 18, pedestal 30 with second via hole, ladder-type axle sleeve 20 with principal piece 21 and attached section 22, described principal piece 21 is arranged in described the first via hole 11, be arranged in to described attached section 22 interference fit described the second via hole, the ladder anchor ring 25 of described axle sleeve 20 presses on the end face 35 of described pedestal 30, the bottom surface 36 of described pedestal 30 and described accessory mount 50 butts, described axle sleeve 20 has the gap between the distal end faces 26 of described accessory mount 50 and described accessory mount 50.Support body 10 is main body racks of stretcher, thereby it offers the corresponding attachment face place that the first via hole 11 is fixedly mounted on whole belt tightener for installation axle sleeve and bolt 28 accessory mount 50.In addition, support body 10 also is provided with corresponding position bearing 18 and Idle wheel is installed.Leave the gap between the circumferential surface of support body 10 and axle sleeve 20, so that support body 10 forms rotatable movable connection structure with axle sleeve 20.
Leave the gap between the end face of the axle sleeve 20 in the belt tightener and the annex mounting bracket 50, guarantee the area of contact of pedestal 30 with the motor adversary part-annex mounting bracket 50 of stretcher, thereby the stress at junction plane place between the diametric alternation shearing stress that dispersion fixing bolt 28 bears and pedestal 30 and the annex mounting bracket 50, preventing that bolt torque is unusual descends and become flexible, reduces simultaneously the probability that fatigue occurs bolt.At the junction plane place, moment of flexure also can be by axle sleeve 20 and bolt 28 shareds, and the moment of flexure of less can prevent the Bolt Torque decay pattern of anomaly, thereby prevent that clamping bolt is loosening, and the problems such as abnormal sound that thereupon produce.
Thereby interference fit and push down pedestal 30 with the step surface front and make bolt indirectly lock pedestal 30 between axle sleeve 20 and the pedestal 30 is to reduce the technological requirement to the processing junction plane.At this moment, merely just can control impacting force to pedestal 30 by the control bolt pretightening, and then it is fastening to control the installation of whole belt tightener.
More preferably, described attached section 22 length is less than the end face 35 of described pedestal 30 and the distance between the bottom surface 36.The length that is attached section 22 is crossed hole depth less than second, so that the end face of axle sleeve 20 and accessory mount 50 supports leave the gap.When part was produced, the matching relationship of the axle sleeve after the optimization, pedestal, accessory mount had reduced the technological requirement that axle sleeve press-fits, and had reduced the complexity of belt tightener.
More preferably, described accessory mount 50 is provided with counterbore 52, attached section 22 terminal part of described axle sleeve 20 stretch into described counterbore 52 and with described counterbore 52 transition fit, described attached section 22 distal end faces 26 has the gap with the bottom surface of described counterbore 52.Axle sleeve 20 microcephalies embed in the default mounting hole of accessory mount, make axle sleeve 20 also can share moment of flexure, improve whole Idle wheel to the resistivity of moment of flexure.
Particularly, on existing belt tightener basis, lengthen axle sleeve 20 microcephaly's axial lengths, and increase the counterbore 52 that cooperates with it at accessory mount 50, guaranteeing with tolerance of size has suitable gap on the concave station of axle sleeve 20 little end surfaces and accessory mount, so that the junction plane of Idle wheel and accessory mount still is the mating face between pedestal and the accessory mount.When Idle wheel is subject to the next vibration of train transmission and moment of flexure, can effectively be distributed on the junction plane of pedestal 30 and accessory mount 50, and be not only born by bolt.Such structure can improve Idle wheel opposing vibration and Engine torque changes the ability of the impact that brings, and improves the reliability of whole train.It is Spielpassung between axle sleeve microcephaly circumferential surface and the accessory mount, be convenient to install, and when working, Idle wheel bears part side direction moment of flexure, reduce the moment of flexure that bolt bears, increased the join strength between belt tightener and the accessory mount 50, improve the ability of the resistance vibration of belt tightener, reduce the probability of bolt torque decay pattern of anomaly, prevent that Idle wheel is loosening, so that the stability of a system of motor promotes the Risk Reduction of clamping bolt fatigue.
More preferably, described support body 10 is provided with annular groove 13, is provided with spring 15 in the described annular groove 13, described spring 15 and described support body 10 and described pedestal 30 equal butts.Described spring 15 is torsion spring, and this torsion spring drives the rotatable support body 10 that is socketed on axle sleeve 20 and produces swing, and Idle wheel 16 is flapped toward belt compression belt thereupon and makes its tensioning.
Above disclosed only is preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (4)
1. belt tightener, be installed on accessory mount belt is carried out tensioning, it is characterized in that: described belt tightener comprises the support body with first via hole, the Idle wheel that is connected with described support body by bearing, pedestal with second via hole, ladder-type axle sleeve with principal piece and attached section, described principal piece is arranged in described the first via hole, be arranged in to described attached section interference fit described the second via hole, the ladder anchor ring of described axle sleeve presses on the end face of described pedestal, the bottom surface of described pedestal and described accessory mount butt, described axle sleeve has the gap between the distal end faces of described accessory mount and described accessory mount.
2. belt tightener according to claim 1, it is characterized in that: described attached section length is less than the end face of described pedestal and the distance between the bottom surface.
3. belt tightener according to claim 1, it is characterized in that: described accessory mount is provided with counterbore, attached section terminal part of described axle sleeve stretch into described counterbore and with described counterbore transition fit, described attached section distal end faces and the bottom surface of described counterbore have the gap.
4. belt tightener according to claim 1, it is characterized in that: described support body is provided with annular groove, is provided with spring in the described annular groove, described spring and described support body and the equal butt of described pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220283042 CN202746515U (en) | 2012-06-15 | 2012-06-15 | Belt tightener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220283042 CN202746515U (en) | 2012-06-15 | 2012-06-15 | Belt tightener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746515U true CN202746515U (en) | 2013-02-20 |
Family
ID=47705914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220283042 Expired - Lifetime CN202746515U (en) | 2012-06-15 | 2012-06-15 | Belt tightener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746515U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691763A (en) * | 2012-06-15 | 2012-09-26 | 广州汽车集团乘用车有限公司 | Belt tensioner |
| CN103267097A (en) * | 2013-06-17 | 2013-08-28 | 江苏爱尔特实业有限公司 | Novel tensioner |
| CN107366723A (en) * | 2017-08-10 | 2017-11-21 | 无锡沄沨科技有限公司 | A kind of lithium battery isolation membrane flush coater stretcher |
-
2012
- 2012-06-15 CN CN 201220283042 patent/CN202746515U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691763A (en) * | 2012-06-15 | 2012-09-26 | 广州汽车集团乘用车有限公司 | Belt tensioner |
| CN102691763B (en) * | 2012-06-15 | 2015-01-21 | 广州汽车集团乘用车有限公司 | Belt tensioner |
| CN103267097A (en) * | 2013-06-17 | 2013-08-28 | 江苏爱尔特实业有限公司 | Novel tensioner |
| CN103267097B (en) * | 2013-06-17 | 2016-06-15 | 江苏爱尔特实业有限公司 | A kind of stretcher |
| CN107366723A (en) * | 2017-08-10 | 2017-11-21 | 无锡沄沨科技有限公司 | A kind of lithium battery isolation membrane flush coater stretcher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 511434, No. 633, Jinshan Avenue East Road, Guangzhou, Guangdong, Panyu District Patentee after: Guangzhou Automobile Passenger Car Co., Ltd. Address before: 510030, 633, Jinshan Avenue East, Guangzhou, Guangdong, Panyu District Patentee before: Guangzhou GAC Group Motor Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |