CN203421098U - Involute wedge block backstop device - Google Patents
Involute wedge block backstop device Download PDFInfo
- Publication number
- CN203421098U CN203421098U CN201320510974.5U CN201320510974U CN203421098U CN 203421098 U CN203421098 U CN 203421098U CN 201320510974 U CN201320510974 U CN 201320510974U CN 203421098 U CN203421098 U CN 203421098U
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- Prior art keywords
- wedge
- shaped blocks
- involute
- wedge block
- inner ring
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Abstract
The utility model relates to an involute wedge block backstop device. The involute wedge block backstop device is composed of an outer ring, an inner ring and a holder fixed to the inner ring, wherein a wedge block making contact with the inner ring and the outer ring is installed between the inner ring and the outer ring, supporting shafts are installed at the two ends of the wedge block, each shaft of the wedge block is installed in a shaft hole of the holder, and the contact face between the wedge block and the outer ring of the backstop device is a cylindrical face. The involute wedge block backstop device is characterized in that the contact face between the wedge block and the inner ring of the backstop device is an involute face, work stress borne by the backstop device is reduced, strength and backstop moment are improved, or the external size of the backstop device is reduced under the same backstop moment, and manufacturing difficulty and cost are reduced.
Description
Technical field
The utility model relates to a kind of wedge-shaped blocks non-return device, particularly a kind of involute wedge-shaped blocks non-return device.
Background technique
At present, the type of the non-return device that home and abroad adopts is divided by the pattern of check part, mainly contains roller type, Wedge plate type, and Wedge plate type be take as main in China.The working surface of wedge-shaped blocks all adopts cylndrical surface at present, being higher pair with the inside and outside circle of non-return device contacts, contact radius of curvature is little, area of contact is little, contact stress is large, when high pulling torque check requires, in order to reduce contact stress, improve the intensity of non-return device, just must have the contacting point radius of curvature compared with imperial palace, outer ring, wedge-shaped blocks, make like this profile of non-return device larger, manufacture is difficult, cost is high.Particularly, inner ring is outer contacting with contacting of wedge-shaped blocks, under equal conditions large than the working stress of interior contact, is therefore the strength weak link of non-return device, has restricted the miniaturization of non-return device.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of involute profile wedge-shaped blocks is provided, and the surface of contact that makes non-return device inner ring and wedge-shaped blocks is involute surface, and radius of curvature increases, thereby reduces working stress, improves intensity, reduces boundary dimension.
The technical solution of the utility model is: a kind of involute wedge-shaped blocks non-return device, it is by outer ring, inner ring, retainer fixing on inner ring forms, between outer ring and inner ring, the wedge-shaped blocks contacting with inside and outside circle is installed, there is back shaft at the two ends of wedge-shaped blocks, and the axle of each wedge-shaped blocks is arranged in the axis hole of described retainer, and the surface of contact of wedge-shaped blocks and non-return device outer ring is cylndrical surface, it is characterized in that, the surface of contact of wedge-shaped blocks and non-return device inner ring is involute surface;
The base cylinder axis of described wedge-shaped blocks involute profile is parallel with the axis of cylndrical surface.
The utility model feature is: by the weak link of current non-return device, the way of contact of inner ring and wedge-shaped blocks, by Cylindrical Surfaces Contact, changing into involute surface contacts, thereby in the space of Internal and external cycle size constancy, can obtain the radius of curvature that contacts of larger wedge-shaped blocks and inside and outside circle, reduce the working stress of non-return device, improve intensity and check moment, or under identical check moment, reduce the boundary dimension of non-return device, lower manufacture difficulty, reduce costs.
Accompanying drawing explanation
Fig. 1 is for being a kind of involute wedge-shaped blocks non-return device fundamental diagram;
Fig. 2 is the structural representation of involute wedge-shaped blocks;
The anti-skidding angle α of Fig. 3 non-return device work
a, α
bschematic diagram;
Embodiment
From Fig. 2, Fig. 3, involute wedge-shaped blocks working surface has two, the one, involute profile 5, another is cylinder profile 7, there is back shaft 4 at these wedge-shaped blocks 3 two ends, back shaft 4 and cylinder profile 7 coaxial lines, the base cylinder axis of involute profile 5 and the axial location of cylinder profile 7 are appropriate, while making check, its anti-skidding angle is less than friction angle (when friction factor is 0.05 ~ 0.10, friction angle be 2 ° 52 ' ~ 5 ° 42 '), self-locking requirement while meeting wedge-shaped blocks 3 check, wedge-shaped blocks 3 can not reverse during check, and check was lost efficacy.
As shown in Figure 1, involute wedge-shaped blocks non-return device inner ring 2 is involute profile 5 with the surface of contact of wedge-shaped blocks, and non-return device outer ring 1 is cylinder profile 7 with the surface of contact of wedge-shaped blocks 3.Curvature on involute 8 changes, and makes contact obtain large radius of curvature, has reduced surperficial working stress.Involute profile 5 changes to the distance of the rotation axis of wedge-shaped blocks 3, during conveyor running, non-return device is in forward, wedge-shaped blocks 3 is with inner ring 2, retainer rotates together, wedge-shaped blocks 3 sways, contacting point involute profile 5 diminishes to the distance of the rotation axis of wedge-shaped blocks 3, wedge-shaped blocks slips over outer ring 1 internal surface, when conveyor stops, at conveyor, carry under the effect of material, conveyor has reversal trend, non-return device reverses thereupon, wedge-shaped blocks 3 rotates backward around axle, contacting point involute profile 5 becomes large to the distance of the rotation axis of wedge-shaped blocks 3, wedge-shaped blocks 3 checks now, prevent reversion.
Claims (2)
1. an involute wedge-shaped blocks non-return device, it is by outer ring (1), inner ring (2), the upper fixing retainer of inner ring (2) forms, between outer ring and inner ring, the wedge-shaped blocks (3) contacting with inside and outside circle is installed, there is back shaft (4) at the two ends of wedge-shaped blocks (3), and the axle of each wedge-shaped blocks is arranged in the axis hole of described retainer, and the surface of contact of wedge-shaped blocks and non-return device outer ring is cylndrical surface, it is characterized in that, wedge-shaped blocks (3) is involute surface (5) with the surface of contact of non-return device inner ring.
2. a kind of involute wedge-shaped blocks non-return device according to claim 1, is characterized in that, the base cylinder axis (6) of described wedge-shaped blocks involute profile (5) is parallel with the axis of cylndrical surface (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510974.5U CN203421098U (en) | 2013-08-21 | 2013-08-21 | Involute wedge block backstop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510974.5U CN203421098U (en) | 2013-08-21 | 2013-08-21 | Involute wedge block backstop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203421098U true CN203421098U (en) | 2014-02-05 |
Family
ID=50020197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320510974.5U Expired - Fee Related CN203421098U (en) | 2013-08-21 | 2013-08-21 | Involute wedge block backstop device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203421098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482088A (en) * | 2014-12-10 | 2015-04-01 | 一拖(洛阳)开创装备科技有限公司 | Non-return mechanism for conveying equipment |
-
2013
- 2013-08-21 CN CN201320510974.5U patent/CN203421098U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482088A (en) * | 2014-12-10 | 2015-04-01 | 一拖(洛阳)开创装备科技有限公司 | Non-return mechanism for conveying equipment |
| CN104482088B (en) * | 2014-12-10 | 2017-01-11 | 一拖(洛阳)开创装备科技有限公司 | Non-return mechanism for conveying equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20150821 |
|
| EXPY | Termination of patent right or utility model |