Patent Application
20130082225
Not applicable.
Not applicable.
Not applicable.
Not applicable.
1. Field of the Invention
The present invention relates generally to a capstan mechanism, and more particularly to an innovative one in which the combination driving gear set and rotation axis are in a combination style.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
A capstan mechanism plays an important role in rolling steel cables, fabric tapes and many other similar ropes. Due to this function, it is widely used in setting up tennis nets and for dragging yachts and automobiles. In order to guarantee safety use, the structural strength of the mechanism must be carefully considered during design and production if it is intended to be used in high load situations.
The prior-art capstan mechanism is comprised of a base and a gear unit. The gear unit comprises of a driven wheel and an integral structure driving wheel in the two location holes fixed on the base. The rolling function is thus realized by the gear unit under the help of the rotation piece on one side of the driving wheel. However, it is found that such prior-art structure has the following problems in actual usage.
When installing the driving wheel of the integral structure of the prior-art capstan mechanism, two location holes are required due to assembling needs. As the driving wheel of the integral structure needs to be installed into the mechanism from one location hole, it shall be big enough, leading to different hole diameters between the two holes. Besides, while fixing the rotation axis on the hole with a bigger diameter, at least one fixing component shall be set between the hole and the rotation axis, thus concentricity error among the components during assembly will be increased. Also, power distribution shall be affected when the driving wheel bears radial load. In high load conditions, the mechanism strength may be not large enough to suffer and the production and manufacturing costs shall be increased for adding location components. Also, the design cost will be increased to design suitable location holes to match with the base resulting from different sizes of the driving wheel.
Thus, to overcome the aforementioned problems of the prior art, it would be an advancement if the art to provide an improved structure that can significantly improve the efficacy.
Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.
The feature of this “capstan mechanism” lies in its innovative construction of the combined style between the combined-style gear set and the rotation axis. Compared with the previous technologies, during the present invention, location holes on the base are needed to be made due to the combined style of the combination driving gear set and the rotation axis, and the hole diameter shall be big enough to let the rotation hole go through it. If there is any need to make a change to the load specification, one must select the collocation arrays of the gear wheel and gear disc according to the collocation method, set the engaged mean as one or two for each, etc. No more new design to this base is needed, thus the specification of the base could be used in all situations.
Due to the innovative construction, the diameter of the location holes shall be big enough for going through the rotation axis, thus the concentricity among the parts of the capstan mechanism is realized and production cost is saved.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Said capstan mechanism A includes a base 10, which comprises a base plate 11 and two side plates 12. Two equant location holes 20 are fixed on the set positions of the two side plates 12 of the base 10 respectively.
A rotation axis 30 is installed through the two equant location holes 20 is able to rotate, and one axis assembled section 31 is formed. There is one driven gear set 40.
A gear disc 41 is at each side, and one fixed axis 42 is in the middle which is assembled between the two side plates 12 of the base, is able to rotate, and one roll section 43 is formed between the two gear discs 41.
A combination driving gear set 50 is combined to the axis assembled section 31 of the rotation axis 30 and able to rotate synchronously. The combination driving gear set 50 comprises one gear wheel 51 at each side and a space keeping component 52 at the center. Gear wheel 51 is engaged to the gear disc 41 of the driven gear set 40, making the combination driving gear set 50 able to drive the driven gear set 40.
A rotation handle 60 is assembled at the end of the rotation axis 30, and able to rotate the rotation axis 30 with the rotation handle 60 and force the combination driving gear set 50 to be engaged to and drive the driven gear set 40.
Of which, a bearing 32 and limit component 33 is equipped at the two sides of the rotation axis 30 to fix the rotation axis 30 into the location hole 20 on the two side plates 12 of the base 10. Due to the large enough holes of the two location holes 20, the concentricity degree among the parts of the capstan mechanism is guaranteed.
Of which, one end of the rotation handle 60 is equipped with one holding rod 61, and the other is connected to the rotation axis 30. The capstan mechanism A starts to work if the rotation handle is rotated by the holding rod 61.
Of which, a check mechanism 70 is set on the specified position of the base 10 to control the combination driving gear set 50 to rotate clockwise or anticlockwise.
Of which, each surface of axis assembled section 31 on rotation axis 30 is equiform.
When assembling capstan mechanism A, make sure the rotation axis 30 is able to insert through the location hole 20 by one side plate 12 of the base 10, and then complete assembly by going through the combination driving gear set 50.
Of which, the axis assembled section 31 of the rotation axis 30 forms the first combination section 34, and second combination section 53 at the matched position of the gear wheel 51 and first combination section 34, so that the first combination section 34 of the rotation axis 30 can go through and be fixed on the second combination section 53 of the gear wheel 51. Thus the combination driving gear set 50 could be driven to rotate synchronously with the rotation axis 30.
Of which, the radial surface of the axis assembled section 31 is of non-circular form (refer to the Arrow B in
Of which, the interval keeping component 52, with hollow straight form, is equipped at the exterior of the axis assembled section 31 of the rotation axis 30 to fix the interval of the gear wheel 51 at the two sides.
According to the above-mentioned structure, composition and design, the capstan mechanism A under the present invention is operated as follows.
Referring to
The check mechanism 70 is used to control the driven gear set 40 and generate a fixing effect and direction rotation ability, thus the checking phenomenon of the driven gear set 40 and combination driving gear set 50 due to the large tension on the ropes in roll section 43 when the check mechanism 70 is rolling could be avoided.
