A lifting machine base assembly for use in a machine tool includes a machine base and a lateral wheel set. The lateral wheel set includes two lateral wheel frames respectively pivotally connected to two opposite sidewalls of the machine base, and a wheel shaft rotatably inserted through the machine
A lifting machine base assembly for use in a machine tool includes a machine base and a lateral wheel set. The lateral wheel set includes two lateral wheel frames respectively pivotally connected to two opposite sidewalls of the machine base, and a wheel shaft rotatably inserted through the machine base and eccentrically connected between the lateral wheel frames. A driving member is fastened to one end of the wheel shaft and operable to raise and lower the lateral wheel frames relative to the machine base and to further force the lateral wheels into contact with the floor to lift the machine base partially or wholly from the floor, allowing the operator to conveniently move the machine tool to a desired position by rotation of the lateral wheels.
대표청구항▼
1. A lifting machine base assembly for use in a machine tool, comprising: a machine base; anda lateral wheel set, comprising two lateral wheel frames respectively pivotally connected to said machine base;two lateral wheels respectively mounted to said lateral wheel frames;a rotatable wheel shaft ins
1. A lifting machine base assembly for use in a machine tool, comprising: a machine base; anda lateral wheel set, comprising two lateral wheel frames respectively pivotally connected to said machine base;two lateral wheels respectively mounted to said lateral wheel frames;a rotatable wheel shaft inserted through said machine base and eccentrically coupled between said two lateral wheel frames; anda driving member located directly adjacent to one of the lateral wheel frames and connected to one end of said wheel shaft and operable to rotate said wheel shaft between a first position, where said machine base is maintained in contact with the floor, and a second position, where said lateral wheel frames are pivoted by said wheel shaft to move said lateral wheels into contact with the floor to at least partially lift said machine base from the floor. 2. The lifting machine base assembly according to claim 1, wherein each said lateral wheel frame comprises a front end pivotally connected to one lateral sidewall of said machine base, and a rear end, wherein one said lateral wheel is coupled to the rear end thereof. 3. The lifting machine base assembly according to claim 2, wherein each said lateral wheel frame comprises an oblong hole disposed near the front end thereof; and said wheel shaft comprises two eccentric end portions respectively located on two opposite ends thereof and respectively inserted into the oblong holes of said two lateral wheel frames, wherein one said eccentric end portion is connected to said driving member. 4. The lifting machine base assembly according to claim 1, further comprising a bottom wheel set, having a mounting frame affixed to said machine base, a wheel holder having a middle part thereof pivotally connected to said mounting frame, a bottom wheel rotatably coupled to a front end of said wheel holder, a rotatable shaft inserted through said machine base and said bottom wheel frame and having first and second distal ends thereof, the first end thereof eccentrically connected to a rear end of said wheel holder, and a lever connected to the second end of said rotating shaft and operable to move said rotating shaft, the lever being selectively moveable between a third position, where said machine base is maintained in contact with the floor, and a fourth position, where said bottom wheel holder is pivoted by said rotating shaft to force said bottom wheel into contact with the floor to lift said machine base from the floor. 5. The lifting machine base assembly according to claim 4, wherein said wheel holder includes a bottom retaining notch disposed near the rear end thereof; and said rotating shaft includes an eccentric block engaged with said bottom retaining notch of said wheel holder. 6. The lifting machine base assembly according to claim 5, wherein said rotatable shaft comprises a first shaft member rotatably inserted through said wheel holder, said first shaft member having a first end thereof terminating in said eccentric block, and a second shaft member rotatably inserted through said machine base and axially connected to an opposite second end of said first shaft member. 7. The lifting machine base assembly according to claim 4, wherein said mounting frame comprises two opposed sidewalls; and said wheel holder is pivotally coupled between the two opposed sidewalls of said mounting frame. 8. A lifting machine base assembly for use in a machine tool, comprising: a machine base; andat least one bottom wheel set, comprising a mounting frame having a top wall affixed to said machine base and two sidewalls downwardly extending from the top wall, a wheel holder having a middle part thereof pivotally connected between the two sidewalls of said mounting frame, a bottom wheel rotatably coupled to a front end of said wheel holder, a rotatable shaft inserted through said machine base and said bottom wheel frame and having first and second distal ends thereof, the first end thereof eccentrically connected to a rear end of said wheel holder, and a lever connected to the second end of said rotating shaft and operable to move said rotating shaft, the lever being selectively moveable between a third position, where said machine base is kept in contact with the floor, and a fourth position, where said bottom wheel holder is pivoted by said rotating shaft to force said bottom wheel into contact with the floor to lift said machine base from the floor. 9. The lifting machine base assembly according to claim 8, wherein said wheel holder includes a bottom retaining notch disposed near the rear end thereof; and said rotating shaft includes an eccentric block engaged with said bottom retaining notch of said wheel holder. 10. The lifting machine base assembly according to claim 9, wherein said rotatable shaft comprises a first shaft member rotatably inserted through said wheel holder, said first shaft member having a first end thereof terminating in said eccentric block, and a second shaft member rotatably inserted through said machine base and axially connected to an opposite second end of said first shaft member. 11. The lifting machine base assembly according to claim 8, further comprising at least two bottom wheel sets. 12. A lifting machine base assembly for use in a machine tool, comprising: a machine base; anda lateral wheel set, comprising two lateral wheel frames respectively pivotally connected to said machine base;two lateral wheels respectively mounted to said lateral wheel frames;a rotatable wheel shaft inserted through said machine base and eccentrically coupled between said two lateral wheel frames; anda driving member connected to one end of said wheel shaft and operable to rotate said wheel shaft between a first position, where said machine base is maintained in contact with the floor, and a second position, where said lateral wheel frames are pivoted by said wheel shaft to move said lateral wheels into contact with the floor to at least partially lift said machine base from the floor; anda bottom wheel set, comprising: a mounting frame affixed to said machine base;a wheel holder having a middle part thereof pivotally connected to said mounting frame;a bottom wheel rotatably coupled to a front end of said wheel holder;a rotatable shaft inserted through said machine base and said bottom wheel frame and having first and second distal ends thereof, the first end thereof eccentrically connected to a rear end of said wheel holder; anda lever connected to the second end of said rotating shaft and operable to move said rotating shaft, the lever being selectively moveable between a third position, where said machine base is maintained in contact with the floor, and a fourth position, where said bottom wheel holder is pivoted by said rotating shaft to force said bottom wheel into contact with the floor to lift said machine base from the floor. 13. The lifting machine base assembly according to claim 12, wherein each said lateral wheel frame comprises a front end pivotally connected to one lateral sidewall of said machine base, and a rear end, wherein one said lateral wheel is coupled to the rear end thereof. 14. The lifting machine base assembly according to claim 13, wherein each said lateral wheel frame comprises an oblong hole disposed near the front end thereof; and said wheel shaft comprises two eccentric end portions respectively located on two opposite ends thereof and respectively inserted into the oblong holes of said two lateral wheel frames, wherein one said eccentric end portion is connected to said driving member. 15. The lifting machine base assembly according to claim 12, wherein said wheel holder includes a bottom retaining notch disposed near the rear end thereof; and said rotating shaft includes an eccentric block engaged with said bottom retaining notch of said wheel holder. 16. The lifting machine base assembly according to claim 15, wherein said rotatable shaft comprises a first shaft member rotatably inserted through said wheel holder, said first shaft member having a first end thereof terminating in said eccentric block, and a second shaft member rotatably inserted through said machine base and axially connected to an opposite second end of said first shaft member. 17. The lifting machine base assembly according to claim 12, wherein said mounting frame comprises two opposed sidewalls; and said wheel holder is pivotally coupled between the two opposed sidewalls of said mounting frame.
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