JPS6116038Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a manual lifting device equipped with a quill vertical precision feed handle and a vertical coarse feed lever provided on the ram head of a ram type milling machine. This can be done simply by operating the feed lever.

The ram head of a ram-type milling machine is equipped with a handle and a lever to feed the quill up and down. The handle allows precision feeding of the quill and is used for vertical positioning of the quill and cutting feed. In addition, the lever can coarsely feed the quill,
Mainly used for drilling work. There are devices equipped with a switching mechanism (interlock mechanism) so that the handle and lever do not function to feed the quill up and down at the same time. However, in the conventional switching mechanism described above, the switching operation on the handle side or the lever side is performed using an operating rod separate from the quill vertical feed handle or lever, and then the switching operation on the handle side or lever side that is not released (interlocked) is performed. The quill is moved up and down manually. For this reason, operability is extremely important, and the handle or lever on the interlocked side may be operated incorrectly, resulting in a lack of practicality. This is Mikoaki
A similar drawback can be seen in automatic/manual switching safety devices, as seen in No. 54-10058.

The object of the present invention is to provide a manual lifting/lowering device for a quill, which is equipped with a novel switching mechanism that eliminates the drawbacks of the switching mechanism (interlock mechanism) described above. That is, in a clutch shifter in which a precision feed handle is engaged by a worm with a worm wheel that is loosely fitted to a rotating shaft for raising and lowering the quill, and a coarse feed lever is loosely fitted to the rotating shaft and engaged with the rotating shaft, this clutch shifter is moved in the axial direction under the combined operation of one coarse feed lever and is alternately connected to the handle side or the lever side. This dramatically improves the operability of the precision feed handle or lever that manually raises and lowers the quill, and eliminates erroneous operation of the handle or lever on the disconnected side. I succeeded in doing two different operations with .

Next, the present invention will be explained with reference to embodiments shown in the drawings.
Figure 1 shows the ram head of a ram type milling machine.
This is a right side view of the RM, which is attached to a flange 1a provided on the tip surface of the ram 1 with four bolts 2. M is a main motor mounted on the top of the ram head RM, which is wound around a pulley 4 of a stepped transmission (not shown) via a V-belt 3, and a main shaft 5 is connected to the output side of the stepped transmission. ing. This main shaft 5 is fitted into a quill 6 and is integrally moved up and down by manual operation of a precision feed handle (hereinafter simply referred to as the handle) 7 or a coarse feed lever (hereinafter simply referred to as the lever) 8. It is moved up and down. The handle 7 is capable of precisely feeding the quill 6 and is used for vertical positioning and switching feed of the quill, while the lever 8 is capable of coarsely feeding the quill 6 and is mainly used during drilling work. A switching mechanism is provided so that the handle and lever do not function at the same time (described later).

Next, the main parts of the present invention will be explained with reference to FIG.
10 is a rotating shaft for raising and lowering the quill 6;
0a is supported by double bearings 11, 11 in a horizontal position perpendicular to the axial direction of the quill. In addition, a pinion cylinder 1 is provided on the left end side of the rotation shaft 10.
The second large diameter portion 12a is supported by the needle bearing 13. A pinion 14 is provided midway to the left of the rotating shaft 10, and is meshed with a rack 6a cut into the back surface of the quill 6 together with the pinion 12b of the pinion cylinder 12. Left side pinion cylinder 12
, there is a screw 16 on the inner end of the mainspring 15 on the left side.
The outer end of the mainspring 15 is fixed to the flange ring 18a of the cap body 18 by screws 17. The mainspring 15 is provided with a rotational force that pushes the quill 6 upward against the pinion cylinder 12, and prevents backlash between the pinions 12b, 14 and the rack 6a due to the forward and reverse rotation of the rotating shaft 10. It's summery. Rotation axis 1
The right half 10d of the 0 is equipped with a handle 7 for manual operation, related members of a lever 8, and a switching mechanism IR with an interlock function. First, the drive system of the handle 7 that rotates the rotation shaft 10 will be explained. 20 is a worm wheel, rotation axis 10d
The engagement clutch is loosely fitted on the right side of this
The driving side wheel 21 of C ₁ is attached with three bolts 2
2. It is attached by... 23 is a circlip, which is attached to the right edge shaft portion 1 of the clutch wheel 21.
0d, and restricts the axial movement of the worm wheel 20. The worm wheel 20 meshes with a worm 25 provided at the rear end of an operating shaft 24 supported in a horizontal position as shown in FIG. 3, and a handle 7 is attached to the front end of the operating shaft 24. The worm wheel 20 can be rotated from 1/20 to 1/2 by rotating the handle 7 in the forward or reverse direction.
It is decelerated to about 30 degrees and idles on the rotating shaft 10. .

Next, the drive system of the lever 8 will be explained. Reference numeral 26 denotes an operating barrel, which is loosely fitted into a stepped ring 27 fixed to the right end 10e of the rotating shaft 10 with a bolt 28. Further, the flange ring 26a of the operating barrel 26 is loosely inserted into the right end stepped ring a of the ram head RM. 2
9 and 29 are seat surfaces 26 made by cutting out the sides of the operation cylinder 26;
A swinging body 31 attached to the proximal end of the lever 8 is pivotally connected to a pin 30 that is connected between the bifurcated brackets and is attached with bolts to b. Thus, the lever 8 rotates around the operating tube 26 with the stepped ring 27 as the rotation center.
and empty it all together. Rotation shaft 10 between the worm wheel 20 and the swinging body 31 of the lever 8 as described above
An interlock (switching mechanism) is constructed in which the clutch shifter, which is engaged with the clutch shifter, is alternately engaged with and disengaged from the worm wheel or the operating tube 26 of the lever by operating the lever. That is, in Figure 2, 3
Reference numeral 2 denotes a sliding cylinder that is engaged with the right half 10d of the rotating shaft 10 by a key 33, and a shifter ring 34 is attached to the right end surface of the sliding cylinder 2 by bolts 35. A concave ring 34a is formed in the shifter ring 34, and a protruding ring 34b is formed on the right end edge, and an engagement groove 31a recessed at the tip of the swinging body 31 serving as a shifter is engaged with the protruding ring 34b. By swinging the lever 8 left and right, the sliding tube 32 can be moved left and right on the rotation axis 10d. Reference numeral 36 denotes a ball, which is connected to the rotation shaft 1 by a compression spring 37' in a blind hole 34c bored in the shifter ring 34.
Pressing 0d. That is, the rotating shaft 10d that is pressed by the ball 36 is recessed with two hollow rings A and B, and the sliding cylinder 32 is placed in two states in which the ball 36 is engaged and pressed by the hollow rings A and B. Position. 3
8 is a movable clutch wheel, in which a convex groove 38b engages with a groove 32a formed on the outer periphery of the sliding tube;
Can be moved in the axial direction. The two clutch wheels 21 and 38 have meshing teeth 21a, . . . , 38a, . Reference numeral 37 designates a movable clutch disc on the lever 8 side, and a convex piece 37b engages with a groove 32a formed on the outer periphery of the sliding cylinder, allowing it to move in the axial direction. Several through holes 37a are bored on the circumference of the disk 37, and can be engaged with several pins 42 attached to the end surface of the operation tube 26. 39 and 40 are circlips fitted on both sides of the outer periphery of the sliding tube 32, and both 38 and 37 are separated from each other.
At the same time, the members 21a and 42... do not mesh or engage with each other. A strong coil spring 41 is compressed between the wheel 36 and the disk 37, and separates the wheels 38 and 37 until they are stopped by the circlips 39 and 40. As shown in FIG. 2, when the sliding tube 32 moves toward the wheel 20 and engages the ball 36 with the hollow ring, the meshing teeth 21a and 38a of the wheels 21 and 38 are connected, and the worm wheel 20 is transmitted to the rotating shaft 10 via members 21, 38, and 32. Furthermore, when the sliding tube 32 moves toward the operation tube 26 and engages the ball 36 with the hollow ring as shown in FIG. 5, the through holes 37a of the disc 37 engage with the pins 42. , the rotational torque of the lever 8 is switched to a relationship in which it is transmitted to the rotational shaft 10 via the members 26, 37, and 32.

The present invention has the above-mentioned configuration, and its operation will be explained below. First, to move the quill 6 up and down using the handle 7 provided on the front of the ram head RM,
Swing the lever 8 outward from the ram head RM as shown in Figure 2. As a result, the shifter ring 34 is moved to the left by the swinging body 31, and the sliding tube 32 integrated with the shifter ring 34 is moved to the left, so that the movable clutch wheel 38 is engaged with the clutch wheel 21 on the fixed side. Then, when the handle 7 is turned to the right as shown in Fig. 3, the worm wheel 2
0 is decelerated to 1/20 to 1/30 and rotates to the right, and this clockwise rotation force is transferred to the rotating shaft 10 via members 21, 38, and 32.
Rotate to the right. Therefore, when the handle 7 is rotated to the right, the quill rises to a very low speed, and when the handle 7 is rotated to the left, the quill is lowered. As mentioned above, when the handle 7 is effective for raising and lowering the quill 6, the lever 8 side is connected to the through hole 37a of the disc 37...
Since it is removed from pin 42..., even if you operate it by mistake, it will just spin idly.

Next, to move the quill 6 up and down using the lever 8 provided on the right side of the ram head RM, use the lever 8.
as shown in Figure 5 to the ram head RM.
As a result, the shifter ring 34 is moved to the right by the oscillating body 31, and the sliding tube 32 integrated therewith is moved to the right to move the movable clutch wheel 38 to the fixed side clutch wheel 21.
At the same time, the through holes 37a of the disc 37 are engaged with the respective pins 42. In addition, the through hole 37a...
When inserting the pin 42... into the lever 8
are rotated a little to align the centers of both 37a and 42 and connect them. Therefore, when the lever 8 is turned to the right as shown in FIG.
2, 37, and 32, the rotation shaft 10 is rotated to the right at a constant speed. Therefore, the quill 6 quickly rises when the lever 8 is rotated to the right, and lowered when the lever 8 is rotated to the left. When the lever 8 is effective for moving the quill 6 up and down, the clutches 21 and 38 are disengaged on the handle 7 side, so even if the lever is operated by mistake, it will simply idle.

The present invention is not limited to the one embodiment described above, and design changes can be made within the gist of the invention. For example, the clutch members 37, 42, 42 on the lever 8 side may also be dog clutches, and the clutch wheel 38
A coil spring 41 press-fitted between the clutch disc 37 has the effect of separating both 37 and 38 and a buffering effect when the clutch is engaged. It may be fixed at the top and the coil spring 41 may be omitted. Furthermore,
The sliding tube 32 and the shifter ring 34 may be integrally configured.

According to the present invention, the handle is engaged with a worm wheel that is loosely fitted to the rotating shaft for lifting and lowering the quill, and a lever is pivotally connected to the operation that is loosely fitted to the end of the rotating shaft for lifting and lowering, and the lifting and lowering The movable side member of the clutch member that connects with the worm wheel and the operation tube is provided on both sides of the sliding tube engaged on the rotating shaft, and the swinging body of the lever is attached to the shifter ring provided on the sliding tube. When engaged, the sliding cylinder is moved in the axial direction by the swinging operation of the lever, thereby creating a switching mechanism that reciprocally connects and separates the worm wheel or the operating cylinder from the lifting rotation shaft, and also rotates this lever. Since the quill is coarsely fed by operation, the operability of the handle or lever for manually raising and lowering the quill is dramatically improved, and erroneous operation of the handle or lever on the side that is interlocked (uncoupled) can be eliminated. Of course, one lever can perform two different operations, which has the effect of streamlining this type of switching mechanism.

[Brief explanation of the drawing]

Fig. 1 is a right side view of a ram head equipped with the device of the present invention, Fig. 2 is a plan sectional view of the lever portion, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is an end face of the lever portion. FIG. 5 is a plan sectional view showing the operating state. 6... Quill, 7... Handle, 8... Lever, 10... Rotating shaft, 20... Worm wheel, 21, 38... Clutch wheel, 25...
Worm, 26... operating tube, 27... stepped ring, 31... rocking body, 32... sliding tube, 34...
Shifter ring, 36... Ball, 37... Clutch disk, 41... Coil spring, 42... Pin, A, B... Hollow ring, 37'... Spring, IR... Switching mechanism (interlock), RM ...Ramhead.

Claims (1)

[Scope of utility model registration request] A precision feed handle is provided with a worm engaged with a worm wheel that is loosely fitted to the rotating shaft for lifting and lowering the quill, and a coarse feed lever is pivotally connected to an operation tube that is loosely fitted to the end of the rotating shaft for lifting and lowering the quill. A movable member of a clutch member that connects with a worm wheel and an operating tube is provided on both sides of the sliding tube engaged on the rotating shaft for lifting and lowering, and a coarse feed lever is attached to a shifter ring provided on the sliding tube. a switching mechanism that engages the oscillating body and moves the sliding tube in the axial direction by the oscillating operation of the coarse feed lever to reciprocally connect and separate the worm wheel or the operating tube from the lifting rotation shaft; At the same time, when the movable side member engages with the operation cylinder, it is coupled to the vertical rotation shaft,
A manual elevating device for a main shaft quill, characterized in that the quill is coarsely fed by rotating a coarse feed lever.