Patent Grant
9150381
1. Technical Field
The present disclosure relates to expansion devices, and particularly to an expansion device for holding and securing rolled materials.
2. Description of the Related Art
When a rolled material is involved in a manufacturing process, an expansion device is required to hold or secure the rolled material onto a roller spindle or mandrel. A typical expansion device includes a roller and two expansion members movably mounted on opposite ends of the roller. Each expansion member includes an inclined surface. Inclined directions of the two inclined surfaces of the two expansion members are opposite to each other. The roller is inserted into an axial hole of the rolled material. When the two expansion members move away from each other, the inclined surfaces resist against opposite ends of the rolled material, respectively, such that the rolled material is being securely held, and can rotate along with the roller. However, the inclined surfaces of the expansion members contact the rolled material in a linear fashion, so that resisting forces exerted therebetween are relatively small. Thus, the rolled material easily slips relative to the roller.
Therefore, there is room for improvement within the art.
The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views.
Referring to
Referring also to
The fixing sleeve 50 is a substantially hollow cylinder, and securely sleeves on the outer surfaces 313 of the two expansion members 30. A plurality of fixing holes 51, which are all through holes, is defined in a periphery of the fixing sleeve 50 corresponding to the plurality of protrusions 33. Each protrusion 33 is partly received in one fixing hole 51. An inner surface of the fixing sleeve 50 is spaced from the outer surface 313 of the main body 31, and a size of each protrusion 33 is smaller than that of the fixing hole 51, such that the two expansion members 30 are movable relative to the fixing sleeve 50.
The pushing member 70 is movably sleeved on the threaded portion 13, and resists against the main bodies 31 of the expansion member 30. The pushing member 70 is a substantially hollow cylinder, and includes a fourth inclined surface 71 at one end thereof adjacent to the expansion member 30. The fourth inclined surface 71 engages with the third inclined surface 3115. In profile, the fourth inclined surface 71 is sloped downwardly along the axis of the roller spindle 10 at a direction toward the expansion members 30. The locking member 90 threadedly engages with the first portion 131 of the threaded portion 13, and resists against the pushing member 70. In the illustrated embodiment, the pushing member 70 can be a clamping nut, and the locking member 90 can be a locknut.
In assembly, the two expansion members 30 are mounted on the sleeve portion 11, and the first inclined surface 151 resists against the second inclined surface 3113. Next, the fixing sleeve 50 is sleeved on the outer surfaces 313 of the two expansion members 30. The pushing member 70 is movably sleeved on the threaded portion 13, and the fourth inclined surface 71 resists against the third inclined surface 3115. Last, the locking member 90 is threaded on the first portion 131 of the threaded portion 13, and resists against the pushing member 70.
In use, the rolled material 200 is sleeved on the fixing sleeve 50. The locking member 90 moves toward the expansion members 30, and then the fourth inclined surface 71 resists against the third inclined surface 3115 so as to move the two expansion members 30, move the first inclined surface 151 relative to the second inclined surface 3113, and move the third inclined surface 3115 relative to the fourth inclined surface 71, so that the two expansion members 30 expand toward the fixing sleeve 50. The protrusions 33 pass through the fixing holes 51 and then resist against an inner surface of the rolled material 200 inside the rolling hole 201. Thus, the rolled material 200 is secured on the expansion device 100, and can rotate with the roller spindle 10.
When holding or securing the rolled material 200 on the roller spindle 10, the plurality of protrusions 33 resist against the inner surface of the rolled material 200 inside the rolling hole 201, so that an area of contact formed between the rolled material 200 and the expansion device 100 is relatively large. Thus, a holding or securing force being exerted is greater between the expansion members 30 of the expansion device 100 and the rolled material 200, and the rolled material 200 is prevented from slipping or slippage relative to the expansion device 100.
In another embodiment, the locking member 90 can be omitted, and the pushing member 70 can be directly threaded on the threaded portion 13. A quantity of the expansion members 30 is not limited to two, it can be one or more than two.
It is to be understood, however, that even through numerous characteristics and advantages of the disclosure have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012 1 0285893 | Aug 2012 | CN | national |
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|---|---|---|---|
| 459200 | Fransworth | Sep 1891 | A |
| 2280370 | Bennett | Apr 1942 | A |
| 8910899 | Miyamoto et al. | Dec 2014 | B2 |
| 20090308968 | Piotrowski et al. | Dec 2009 | A1 |
| Number | Date | Country |
|---|---|---|
| 201755930 | Mar 2011 | CN |
| Number | Date | Country | |
|---|---|---|---|
| 20140042262 A1 | Feb 2014 | US |
