CN203050489U - Wedge-shaped key bar for power head - Google Patents
Wedge-shaped key bar for power head Download PDFInfo
- Publication number
- CN203050489U CN203050489U CN 201220572727 CN201220572727U CN203050489U CN 203050489 U CN203050489 U CN 203050489U CN 201220572727 CN201220572727 CN 201220572727 CN 201220572727 U CN201220572727 U CN 201220572727U CN 203050489 U CN203050489 U CN 203050489U
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- Prior art keywords
- wedge
- key bar
- key
- shaped
- bar
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- 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 - Fee Related
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- 238000010008 shearing Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of power output devices of piling machinery, in particular to a wedge-shaped key bar for a power head. The wedge-shaped key bar comprises an outer key sleeve body, a flange plate, a wedge-shaped inner key bar and fixing bolts of the wedge-shaped inner key bar, wherein the flange plate is fixedly arranged at one end of the outer key sleeve body; the wedge-shaped internal key bar is fixedly arranged inside the outer key sleeve body; the part, which is assembled with the wedge-shaped inner key bar, in the outer key sleeve body is wedge-shaped; and the part, which is matched with the outer key sleeve body, of the wedge-shaped internal key bar is wedge-shaped. The inner key bar is fixedly arranged on the outer key sleeve body by screws. When the wedge-shaped key bar for the power head is subjected to stress, the whole power head is uniformly stressed, so that the bolts are not affected by a shearing force, and therefore, the power head is long in service life and convenient to replace.
Description
Technical field
The utility model relates to the power take-off technical field of piling machinery, especially a kind of wedge key bar for unit head.
Background technology
Unit head is as the power take-off of a kind of power take-off of machinery, particularly piling machinery, its contact with drilling tool transmit moment of torsion key cover or key bar be to need often to change because of wearing and tearing.
But existing unit head contacts the structure of output torque and mainly contains two kinds with drilling tool: a kind ofly be, fixing key cover is connected with alignment pin and the bolt of unit head internal key cover by locating flange, in the pressurization drilling process, mainly utilize alignment pin and bolt to transmit moment of torsion and utilize bolt to bear plus-pressure, bolt mainly bears pulling force and shearing, causes bolt to be easy to become flexible or cut off; And this key cover dismounting difficulty, length consuming time has reduced operating efficiency.Another kind is that dismountable key bar is by in the parallel slot that is bolted to the internal key cover, when transmitting moment of torsion, utilize the contact site of key bar and internal key cover to transmit moment of torsion, during pressurization, mainly utilize bolt to come bearing thrust, cause bolt to be subject to shearing and loosening even fracture.
Summary of the invention
In order to overcome the deficiency of existing technology, the utility model provides a kind of wedge key bar for unit head.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of wedge key bar for unit head, comprise external key body, flanged plate, wedge shape internal key bar and set bolt composition thereof, flanged plate is fixed on external key body one end, wedge shape internal key bar is fixed on external key body inside, the part of assembling wedge shape internal key bar is wedge shape in the described external key body, and the part that wedge shape internal key bar cooperates with the external key body is wedge shape.
According to another embodiment of the present utility model, comprise that further described internal key bar is fixed on the external key body by screw.
The beneficial effects of the utility model are, when bearing plus-pressure, whole unit head is stressed, and bolt is not influenced by shearing force, the dynamic cutter head high life, and it is convenient to change.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model wedge structure schematic diagram;
Among the figure, 1, the external key body, 2, flanged plate, 3, wedge shape internal key bar, 4, screw.
The specific embodiment
Be structural representation of the present utility model as Fig. 1, a kind of wedge key bar for unit head, comprise external key body 1, flanged plate 2, wedge shape internal key bar 3 and set bolt composition thereof, flanged plate 2 is fixed on external key body 1 one ends, wedge shape internal key bar 3 is fixed on external key body 1 inside, it is characterized in that the part of 1 li assembling of described external key body wedge shape internal key bar 3 is wedge shape, the part that cooperates with external key body 1 on the wedge shape internal key bar 3 is wedge shape.
Wedge shape internal key bar 3 is fixed on the external key body 1 by screw 4.
In the pressurization drilling process, plus-pressure is delivered to the wall of wedge shape contact, and final plus-pressure is delivered on the whole unit head by external key body 1 and flanged plate 2.When bearing plus-pressure, whole unit head is stressed, and bolt is not influenced by shearing force.
The utility model provide a kind of simple in structure, connect reliable, as to be convenient to safeguard replacing unit head key cover and unit head thereof, it has overcome the shortcoming of original unit head key cover, has effectively promoted the application life of unit head and component thereof.
Claims (2)
1. wedge key bar that is used for unit head, comprise external key body (1), flanged plate (2), wedge shape internal key bar (3) and set bolt composition thereof, flanged plate (2) is fixed on external key body (1) one end, wedge shape internal key bar (3) is fixed on external key body (1) inside, it is characterized in that, the part of described external key body (1) lining assembling wedge shape internal key bar (3) is wedge shape, and it is wedge shape that wedge shape internal key bar (3) is gone up the part that cooperates with external key body (1).
2. the wedge key bar for unit head according to claim 1 is characterized in that, described wedge shape internal key bar (3) is fixed on the external key body (1) by screw (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572727 CN203050489U (en) | 2012-11-02 | 2012-11-02 | Wedge-shaped key bar for power head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572727 CN203050489U (en) | 2012-11-02 | 2012-11-02 | Wedge-shaped key bar for power head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203050489U true CN203050489U (en) | 2013-07-10 |
Family
ID=48733454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220572727 Expired - Fee Related CN203050489U (en) | 2012-11-02 | 2012-11-02 | Wedge-shaped key bar for power head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203050489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913123A (en) * | 2012-11-02 | 2013-02-06 | 玉柴桩工(常州)有限公司 | Wedge key bar for power head and power head |
-
2012
- 2012-11-02 CN CN 201220572727 patent/CN203050489U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913123A (en) * | 2012-11-02 | 2013-02-06 | 玉柴桩工(常州)有限公司 | Wedge key bar for power head and power head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131102 |