Patent Application
20130316864
This application claims all benefits accruing under 35 U.S.C. §119 from Taiwan Patent Application No. 101118814, filed on May 25, 2012 in the Taiwan
Intellectual Property Office, the contents of the Taiwan Application are hereby incorporated by reference.
1. Technical Field
The present disclosure generally relates to a power transmission system, and particularly relates to a transmission apparatus equipped with a transmission shaft control mechanism.
2. Description of Related Art
In a power transmission system of an automation equipment, a transmission shaft is provided for transmitting power from a power source, such as a motor, to other apparatuses. However, a sudden acceleration of the transmission shaft in an idle state may result in damages to the power transmission system due to insufficient fuel.
Therefore, there is room for improvement within the art.
Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.”
The resilient member 102 is located between the mounting member 101 and the braking member 103. In one embodiment, the resilient member 102 is a compression spring.
The braking member 103 includes a base 104, a cover 106, and a plurality of balls 105. A through hole is defined in the center of each of the base 104 and the cover 106.
The base 104 defines a plurality of chambers 107. When the cover 106 is placed on and engaged with the base 104, the cover 106 together with the plurality of chambers 107 forms a plurality of closed spaces. Each of the plurality of closed spaces can accommodate one of the plurality of ball 105. When a ball 105 is received in a closed space, the ball 105 is free to move in the closed space. In one embodiment, the ball 105 is made of metal.
The cover 106 and the stationary member 108 are disc-like. When an outer surface of the cover 106 is in contact with an inner surface of the stationary member 108, a friction force can be produced between the cover 106 and the stationary member 108.
The belt wheel assembly 203 includes a driving wheel 204, a driven wheel 206 and a belt 205 rotating around the driving wheel 204 and the driven wheel 206. The driving wheel 204 is connected to the motor 202 and may be driven to rotate by the motor 202. The driven wheel 206 may be rotated along with the driving wheel 204.
The transmission shaft 207 is inserted through the central through hole of each of the mounting member 101, the resilient member 102, the braking member 103, and the stationary member 108 successively. An end of the transmission shaft 207 is connected to the driven wheel 206. Thus, the transmission shaft 207 may be driven to rotate by the driven wheel 206.
The stationary member 108 is secured to the supporting plate 201. The aperture of its central through hole is larger than the diameter of the transmission shaft 207, so that the stationary member 108 is not in contact with the transmission shaft 207.
The mounting member 101 is firmly secured to the transmission shaft 207 and will not move relative to the transmission shaft 207.
The cover 106 is placed on and firmly attached to the base 104. The cover 106 together with the plurality of chambers 107 forms a plurality of closed spaces. Each of the plurality of closed spaces accommodates a ball 105, which is free to move inside the closed space.
The braking member 103 is located between the stationary member 108 and the mounting member 101. The resilient member 102 is located between the braking member 103 and the mounting member 101. One end of the resilient member 102 abuts the mounting member 101 and the other end of the resilient member 102 abuts the base 104 of the braking member 103. The resilient member 102 provides an elastic force to push the braking member 103 to move towards the stationary member 108.
The aperture of the braking member 103 is larger than the diameter of the transmission shaft 207, so that the braking member 103 is movable along the transmission shaft 207. When the braking member 103 rotates about the transmission shaft 207, the plurality of balls 105 residing in the braking member 103 are flung out by centrifugal force to push the braking member 103 to move away from the stationary member 108 and towards the mounting member 101.
Referring to
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It is to be understood, however, that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions 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 disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 101118814 | May 2012 | TW | national |
