CN203545541U - Roller dropping prevention device of variable-amplitude trolley of tower crane - Google Patents
Roller dropping prevention device of variable-amplitude trolley of tower crane Download PDFInfo
- Publication number
- CN203545541U CN203545541U CN201320570469.XU CN201320570469U CN203545541U CN 203545541 U CN203545541 U CN 203545541U CN 201320570469 U CN201320570469 U CN 201320570469U CN 203545541 U CN203545541 U CN 203545541U
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- CN
- China
- Prior art keywords
- roller
- bearing
- bearing pin
- hinge pin
- prevention device
- 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 - Fee Related
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Abstract
The utility model relates to a tower crane, and in particular relates to a roller dropping prevention device of a variable-amplitude trolley of a tower crane. According to the roller dropping prevention device, even if a bearing is damaged, a roller is prevented from dropping off. The roller dropping prevention device comprises a hinge pin, wherein a convex outer edge is arranged on the outer side of the hinge pin; a roller is arranged on the hinge pin through a bearing; a locking nut is arranged on the inner side of the hinge pin; a baffle ring is arranged between the outer edge of the hinge pin and the bearing; the outer diameter of the baffle ring is greater than the inner diameter of the roller; the inner diameter of the baffle ring is adaptive to the hinge pin. According to the technical scheme, as the baffle ring is arranged between the outer edge of the hinge pin and the bearing, and the outer diameter of the baffle ring is greater than the inner diameter of the roller, the roller can be stopped by the baffle ring and is prevented from dropping off from the hinge pin if the bearing is damaged, and thus the security in construction is improved.
Description
Technical field
The utility model relates to a kind of tower machine, specifically, relates to the anti-lost wheel apparatus of a kind of tower machine amplitude variation trolley.
Background technology
The amplitude variation trolley roller of most of manufacturer production of the prior art, generally all comprise bearing pin, the outer rim of bearing pin arranged outside projection, roller is arranged on bearing pin by bearing, bearing pin inner side arranges jam nut, roller is just locked on bearing pin like this, but in use, bearing damage occurs sometimes, after bearing damage, because the internal diameter of roller is greater than the outer rim of bearing pin, the phenomenon that roller will come off from bearing pin, this is abnormally dangerous when aloft work.
Summary of the invention
For above-mentioned defect, the utility model provides after a kind of bearing damage, the anti-lost wheel apparatus of tower machine amplitude variation trolley that roller also can not come off.
The technical scheme of the anti-lost wheel apparatus of tower machine amplitude variation trolley of the present utility model is such: it comprises bearing pin, the outer rim of bearing pin arranged outside projection, roller is arranged on bearing pin by bearing, bearing pin inner side arranges jam nut, between bearing pin outer rim and bearing, back-up ring is set, the external diameter of back-up ring is greater than the internal diameter of roller, and the internal diameter of back-up ring and bearing pin coordinate.
The anti-lost wheel apparatus of tower machine amplitude variation trolley of the technical program is owing to being provided with a back-up ring between the outer rim at bearing pin and bearing, and the external diameter of back-up ring is greater than the internal diameter of roller, so when occurring in the situation of bearing damage, back-up ring will block roller, prevent that roller from coming off from bearing pin, improved the safety of construction.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anti-lost wheel apparatus of tower machine amplitude variation trolley of the present utility model.
1-back-up ring, 2-roller, 3-bearing, 4-bearing pin, 5-jam nut.
The specific embodiment
Below in conjunction with embodiment, the utility model is elaborated.
It comprises bearing pin 4 the anti-lost wheel apparatus of tower machine amplitude variation trolley of the present utility model, the outer rim of bearing pin 4 arranged outside projections, roller 2 is arranged on bearing pin 4 by bearing 3, bearing pin 4 inner sides arrange jam nut 5, between bearing pin 4 outer rims and bearing 3, back-up ring 1 is set, the external diameter of back-up ring 1 is greater than the internal diameter of roller 2, and the internal diameter of back-up ring 1 and bearing pin 4 coordinate.
With reference to diagram, the anti-lost wheel apparatus of tower machine amplitude variation trolley that the utility model provides, when bearing 3 damages fracture, because back-up ring 1 is larger than roller 2 internal diameters, and bearing pin 4 use jam nuts are fixed on the main limb of dolly, thereby roller 2 cannot be dropped out.
Claims (1)
1. the anti-lost wheel apparatus of tower machine amplitude variation trolley, it comprises bearing pin, the outer rim of bearing pin arranged outside projection, roller is arranged on bearing pin by bearing, bearing pin inner side arranges jam nut, it is characterized in that: between bearing pin outer rim and bearing, back-up ring is set, the external diameter of back-up ring is greater than the internal diameter of roller, the internal diameter of back-up ring and bearing pin coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570469.XU CN203545541U (en) | 2013-09-16 | 2013-09-16 | Roller dropping prevention device of variable-amplitude trolley of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570469.XU CN203545541U (en) | 2013-09-16 | 2013-09-16 | Roller dropping prevention device of variable-amplitude trolley of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203545541U true CN203545541U (en) | 2014-04-16 |
Family
ID=50463688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570469.XU Expired - Fee Related CN203545541U (en) | 2013-09-16 | 2013-09-16 | Roller dropping prevention device of variable-amplitude trolley of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203545541U (en) |
-
2013
- 2013-09-16 CN CN201320570469.XU patent/CN203545541U/en not_active Expired - Fee Related
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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: 20140416 Termination date: 20160916 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |