Structure of a twin disc type tool turret device of a machine

A turret includes a central shaft, a piston sleeve positioned around the central shaft and having moving sticks thereon, a push rod, an actuating seat, and internal and external turrets; the piston sleeve is left and right movable by a power source; the moving sticks are passed through a ringed sleeve, which props a push rod passed through a fixed clutch claw, and facing the actuating seat; the actuating seat includes a rotary shaft, a pivotal shaft, and a toothed ring seat; the piston sleeve can be moved such that the moving sticks and the push rod move forwards, and the rotary shaft engages the toothed ring seat for a tool of a straight tool seat to function; alternatively the piston sleeve can be moved such that the moving sticks and the push rod move backwards, and the rotary shaft disengages the toothed ring seat for allowing replacement of the toothed ring seat.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a twin disk type tool turret device of a machine, more particularly one, which includes a central shaft, a piston positioned around and movable on the central shaft, a push rod and several moving sticks connected to the piston sleeve, and an internal turret equipped with an actuating seat such that the piston sleeve can be moved to a locking position for the tool set to function, and the piston sleeve can be moved to a loosening position for allowing another tool to be chosen from the tool set.

2. Brief Description of the Prior Art

Conventionally, a twin disk type tool turret device of a machine includes a power switching mechanism, an external toothed ring, a central shaft, an internal turret, and an external turret. The power switching mechanism can be switched such that power of a power source is transmitted to the external toothed ring, and the internal turret is turned for allowing one of the tools thereon to be chosen. And, the power switching mechanism can be switched such that power of a power source is transmitted to the central shaft, and the external turret is turned for allowing one of the tools thereon to be chosen.

More specifically, an external toothed ring is securely joined to the internal turret while the central shaft is securely joined to the external turret. The central shaft further has a gear secured thereon. The power switching mechanism includes a rotary sleeve, a transmission shaft, and a transmission sleeve, and the power source is a servomotor, which has an output shaft having a bevel gear secured thereon. The transmission shaft has a pinion secured thereon and engaged with the external toothed ring while the transmission sleeve has a gear secured thereon and engaged with the gear of the central shaft. The bevel gear of the servomotor is engaged with a bevel gear of the rotary sleeve. The rotary sleeve is positioned around both the transmission shaft and the transmission sleeve, and it is disengageably engaged with either the transmission shaft or the transmission sleeve such that power will be passed on to one of the transmission shaft and the transmission sleeve. Therefore, the transmission shaft can be actuated such that the internal turret is turned for allowing one of the tools thereon to be chosen. And, the transmission sleeve can be actuated such that the external turret is turned for allowing one of the tools thereon to be chosen. Furthermore, the transmission shaft has a piston secured thereon, which piston is connected to conduits connected to a power source such that the transmission shaft and the transmission sleeve can be displaced to desired position.

However, the above turret device is particularly used for cutting action, but it can't be used for drilling or knurling action.

SUMMARY OF THE INVENTION

It is a main object of the invention to provide a twin disk type tool turret device to overcome the above problems. The turret device includes a central shaft, a piston sleeve positioned around the central shaft and having moving sticks thereon, a push rod, an actuating seat, and internal and external turrets. The piston sleeve is left and right movable by a power source. The moving sticks are passed through a ringed sleeve, which props a push rod passed through a fixed clutch claw, and facing the actuating seat. The actuating seat includes a rotary shaft, a pivotal shaft, and a toothed ring seat. The piston sleeve can be moved in such a direction that the moving sticks and the push rod move forwards, and the rotary shaft engages the toothed ring seat for a tool of a straight tool seat to function. And, the piston sleeve can be moved such that the moving sticks and the push rod move backwards, and the rotary shaft disengages the toothed ring seat for allowing replacement of the toothed ring seat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIGS. 1 to 4, a preferred embodiment of a twin disk type tool turret device11of a machine includes a base member1, a power switching mechanism2, a central shaft3, a clutch4, an internal turret5, and an external turret6.

The base member1has a fixed ring14fixed thereon, and an external toothed ring51is positioned around the fixed ring14.

The central shaft3is arranged on the base member1, and has a toothed seat301at a first end, a transmission portion302at a second end, a piston sleeve31positioned around a middle portion thereof, and a step-shaped portion32and a push ring33thereon. The transmission portion302is connected to a synchronous belt (B), which is connected to a power source (A). Conduits311, and312are connected to the piston sleeve32and a second power source21, which can be a hydraulic one or a pneumatic one; thus, when the power source is actuated, the piston sleeve32will move left and right, and exert force on the step-shaped portion32and the push ring33to cause left and right linear displacement of the central shaft3. The piston sleeve31further has several equidistantly spaced concave cavities313, on which steel beads314are positioned, as shown inFIGS. 8 to 10.

The clutch4has a fixed clutch claw41, which fixed to a left end of the fixed ring14secured on the base member1. Furthermore, several spaced-apart moving sticks34are fitted on an outer side of the piston sleeve31, and passed into the fixed ring14at first ends thereof. A gear511and a pinion engage each other next a right end of the external toothed ring51, which is positioned around the fixed ring14; the gear511and the pinion are the same as those of the prior art therefore they aren't shown herein. An external ring clutch claw42is securely connected to a left end of the external toothed ring51. The internal turret5includes a right-angle power tool seat52, and a straight power tool seat53(or special power tool seat), and it is securely joined to the external ring clutch claw42; thus, the external toothed ring51will cause the internal turret5to turn when actuated. An actuating seat7is held in the external turret6. The moving sticks34on the piston sleeve31are passed through and securely joined to a ringed sleeve35, and the ringed sleeve35props a push rod36, which is passed through the fixed clutch claw41on the base member1, and faces the actuating seat7.

The actuating seat7includes a rotary shaft71, a pivotal shaft72, an external gear seat73, and a clutch toothed ring seat74. The rotary shaft71has a toothed portion711on a first end, and a connecting head712at a second end, and it can be engaged with and disengaged from a toothed portion741of the clutch toothed ring seat74at the toothed portion711thereof.

The pivotal shaft72has a connecting portion721at a first end, which is joined to the connecting head712of the rotary shaft71, and which holds a rolling bead7211therein. The pivotal shaft72has a hole722facing the push rod36such that when the push rod36is moved forwards, and passed into the hole722, it will make the pivotal shaft72move upwards, and in turn the toothed portion711of the rotary shaft71move upwards together with the pivotal shaft72. The rotary shaft72has an elastic element723at a second end thereof.

The external gear seat73has a toothed seat731, which is engaged with the toothed seat301of the central shaft3. The external gear seat73is positioned around the rotary shaft71such that the rotary shaft71is linearly slidable and angularly displaceable within the external gear seat73. An elastic element732is positioned between the external gear seat73and the rotary shaft71.

The clutch toothed ring seat74has a toothed portion741at a first end thereof, which is next to the toothed portion711of the rotary shaft71. Either the right-angle power tool seat52or the straight power tool seat53(or special power tool seat) is joined to a second end of the clutch toothed ring seat74.

Referring toFIGS. 5,6, and7, which show the twin disk type tool turret mechanism of the invention being in action, first the second power source21, which is connected to the conduits311,312, is used to make the piston sleeve31move leftwards such that the piston sleeve31comes into contact with the step-shaped portion32of the central shaft3, and forces the central shaft3to move leftwards; thus, the internal turret5and the external turret6moves leftwards at the same time, and the external ring clutch claw42and the internal clutch claw43are separated from the fixed clutch claw41. Then, the second power source21is used to provide power to cause rotation of the internal turret5for allowing tool choosing action, which power is transmitted through a bevel gear221, engaging teeth222, a pinion232, the gear511, and the external ring clutch claw42; the tool choosing action is the same as that of the prior art, therefore it isn't detailed herein.

When the internal turret5is turning for allowing tool choosing action, and the operator chooses a tool from those on the external turret6, there has to be an empty tool seat provided on the internal turret5for allowing the tool chosen from the external turret6to be used because the internal turret5has the right-angle power tool seat52and the straight power tool seat53secured thereon; if the operator chooses a tool from those on the internal turret5, there won't have to be an empty tool seat provided on the internal turret5. The right-angle power tool seat52and the straight power tool seat53can be equipped various kinds of tools, e.g. drills, boring tools, and milling cutters. After a tool522is chosen, the operators actuates the second power source21, which is connected to the conduits311,312, to make the piston sleeve31move leftwards such that the piston sleeve31comes into contact with the step-shaped portion32of the central shaft3, and forces the central shaft3to move leftwards; thus, the moving sticks34fitted on the piston sleeve31move leftwards, and cause the ringed sleeve35connected to the front ends of the moving sticks34props the push rod36, which is passed through the fixed clutch claw41. Consequently, the push rod36is tightly passed into the hole722of the pivotal shaft72of the actuating seat7, and makes the pivotal shaft72move upwards, and the pivotal shaft72makes the rotary shaft71move up together with, and the toothed portion711of the rotary shaft71separate from the toothed portion741of the clutch toothed ring seat74, for allowing replacement of the clutch toothed ring seat74.

The operators actuates the second power source, which is connected to the conduits311,312, to make the piston sleeve31move rightwards after another clutch toothed ring seat is placed in position instead of the original one74; when moving rightwards, the piston sleeve31will come into contact with a locating ring37, which has several equidistantly spaced sloping trenches371, such that the steel beads314positioned on the concave cavities313of the piston sleeve31will be subjected to pressure, and will be gradually relocated to slightly sloping trenches315formed next to the concave cavities313, as shown inFIGS. 8,9, and10. The sloping trenches371of the locating ring37are much more sloping than the slightly sloping trenches315. Because the angle between the axis of the piston sleeve31and the slightly sloping trenches315is relatively small the steel beads314will be subjected to great pushing force after they are relocated to the slightly sloping trenches315. And, the steel beads314will move along the sloping trenches371of the locating ring37, and the piston sleeve31is secured in position. After the piston sleeve31is secured in position, the moving sticks34are moved in the reverse direction from the piston sleeve31, and pull the push rod36back, which is tightly passed into the hole722of the pivotal shaft72. And, the elastic element723on the pivotal shaft72is stretched, and the elastic element732between the external gear seat73and the rotary shaft71is stretched as well. Thus, the pivotal shaft72makes the rotary shaft71move back to the original position71, and the toothed portion711of the rotary shaft71engages the toothed portion741of the clutch toothed ring seat74. Then, the power source (A) is actuated; thus, movement is passed on to the transmission portion302of the central shaft3through the synchronous belt (B), and the toothed seat301of the central shaft3causes the external gear seat73to turn together, and in turn the rotary shaft71is turned together with the external gear seat73. And, the toothed portion741of the clutch toothed ring seat74will turn together with the rotary shaft71because the toothed portion741is engaged with the toothed portion711of the rotary shaft71. Because the right-angle power tool seat52has a bevel gear521therein, and the clutch toothed ring seat74is faced with the right-angle power tool seat52, movement will be passed on to the bevel gear521, and in turn the drill of the preferred embodiment starts working; other kinds of tools can be used together with the straight power tool seat53instead of the drill and the right-angle power tool seat52of the present embodiment.

Because the connecting portion721at the first end of the pivotal shaft72is joined to the connecting head712of the rotary seat71, and holds the rolling bead7211therein, the rotary shaft71and the connecting portion721will touch if the connecting portion721isn't tightly engaged with the connecting head712; normally, the rotary shaft71and the connecting portion721don't touch. Because of the rolling bead7211held in the connecting portion721of the pivotal shaft72, the connecting portion721will touch the connecting head712of the rotary shaft71at single point, and there won't be high temperature produced owing to rubbing of the rotary shaft71against the connecting portion721of the pivotal shaft72.