JPH0735728Y2 - Shifting mechanism for polishing machine - Google Patents

Description

[Detailed Description of Device] a. DISCLOSURE OF THE INVENTION [Industrial field of application] The present invention relates to a shift operation mechanism for automatically changing the table feed operation between a high speed / low speed and manual operation in an automatic feed speed change mechanism for a polishing machine.

[Prior Art] Conventionally, a configuration in which a rotary operation shaft having a handle attached to one end thereof allows a table to be moved laterally through a feeding means is disclosed in Japanese Utility Model Publication No. 55-89545.

As a gear shifting operation mechanism of this type of polishing machine, a rotary operation shaft is positioned at three shift positions by a ball plunger only, and a rotary operation shaft is moved in three stages by a lever. However, it is difficult to operate, especially because the positioning at the neutral position is uncertain, and the mechanism is complicated and the operating parts are dispersed. have.

[Problems to be Solved by the Invention] Therefore, the present invention has been studied in view of the above-mentioned conventional problems,
By arranging the switching operation unit at the end of the rotary operation shaft on the side where the handle is attached, it is easy to perform the gear shifting operation, and in particular, it is possible to reliably perform the positioning at the intermediate position. , Its purpose.

B. Configuration of the Invention [Means for Solving the Problems] That is, according to the present invention, a base 1 and a gear case 2 are provided in a gear shifting operation mechanism of a polishing machine provided so that a table 26 can be fed laterally via a feeding means 25. Freely rotatable,
A rotary operation shaft 3 that is slidable in the axial direction is provided, and the feed means 25 is configured by the pinion 25b and the rack 25a that are always engaged even when the rotary operation shaft 3 moves in the axial direction. The low speed clutch 6 and the high speed clutch 5, which are transmitted by gear engagement, are loosely fitted on the rotary operation shaft 3,
A clutch pin 10 which can be engaged and disengaged with each of the meshing portion 6a of the low speed clutch 6 and the meshing portion 5a of the high speed clutch 5 is fixed to the rotary operation shaft 3, and the clutch pin 10 engages with the low speed clutch 6. A positioning mechanism 17 for positioning at a low speed position to be engaged, a manual position at which the low speed / high speed clutch is not engaged, and a high speed position at which the high speed clutch 5 is engaged, the positioning mechanism 17 being provided at one end of the rotary operation shaft 3. Recessed grooves 17a and 17b and 17c
And a positioning mechanism 17 including a steel ball 17e that is provided in the gear case 2 and engages with the recessed grooves 17a, 17b, 17c. The clutch pin 10 is manually provided on the other end side of the rotary operation shaft 3. Fixed at the time of positioning, the clutch pin
A handle 18 is provided so that the fixing can be released when the 10 is positioned at a low speed position or a high speed position, the rotary operation shaft 3 is provided with a concave groove 22a in the axial direction, and the rotary operation shaft 3 is provided with a first knob 20. The pin 22b which is externally mounted and attached to the first knob 20 is provided with the groove 22a.
And the first knob 20 is slidable in the axial direction by a predetermined stroke, and the other end of the rotary operation shaft 3 has a second knob.
21 is fixed, the moving distance from the manual position of the clutch pin 10 to the low speed position engaging the low speed clutch 6, the moving distance from the manual position to the high speed position engaging the high speed clutch 5, The distance between the grooves 17a and 17b, the distance between the concave grooves 17b and 17c, and the sliding distance of the pin 22b in the concave groove 22a,
When the pin 22b at the high speed position contacts the end surface of the groove 22a on the handle 18 side, the distance between the end surface of the first knob 20 on the handle 18 side and the contact surface of the handle 18 on the first knob 20 becomes equal. The above-mentioned problems are solved.

[Embodiment] The first embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 2 and FIG. 2, the rotary operation shaft 3 is rotatably rotatable about the axis with the oil metal 4 interposed between the base 1 and the gear case 2 and is slidable by a predetermined stroke in the axial direction. The clutch 5 for high speed and the clutch 6 for low speed are loosely fitted to the inside of the gear case 2 at its inner end, and both ends of each of the clutches 5 and 6 are attached to the base 1 And the left and right side walls 1b and 2a of the gear case 2, the other ends of which are supported on the side surfaces of the clutches 5 and 6, respectively, and the compression springs 7 and 8 are externally mounted on the rotary operation shaft 3, respectively. By being pressed against the left and right end surfaces of the gear guide 9 fixed to the inner surface of 2a, the gear guides 9 are separated from each other while maintaining a predetermined distance in the axial direction, and the clutches 5 and 6 of the rotary operation shaft 3 are separated from each other. In the middle part, on the facing surfaces of both clutches 5 and 6, S provided the engagement portion 5a, are the clutch pin 10 to be engaged 6a and disengageably engaged and fixed at a right angle with the axial direction.

Further, both clutches 5 and 6 are provided in gears and meshed with the intermediate gears 11 and 12 which are rotatably supported in the gear case 2 in parallel with the rotary operation shaft 3, respectively. And one of the intermediate gears 11 is a gear case 2
An intermediate gear that is meshed with a shaft-equipped pinion 13 that is rotatably mounted on the shaft, and that is fixed to the outer end of the shaft-equipped pinion 13.
Reference numeral 14 is a gear 15a of a shaft of a motor 15 fixed to the gear case 2.
And the clutches 5, 6 are
Is driven and rotated by a motor 15.

A snap ring 16 is fixed to the end of the rotary operation shaft 3 protruding outward from the side wall 2a, and a rotary operation shaft positioning mechanism 17 is provided on the rotary operation shaft 3 and the side wall 2a. Is provided.

Here, the positioning mechanism 17 has three recessed grooves 17a, 17b, 17c on the outer periphery of the rotary operation shaft 3 in the axial direction corresponding to the intervals between the clutches 5, 6 and the clutch pin 10. A steel ball 17e is inserted into the screw hole 17d provided at a right angle to the rotary operation shaft 3 on the side wall 2a.
A spring 17g interposed between this and an adjusting bolt 17f screwed into the screw hole 17d elastically urges the steel ball 17e to select one of the recessed grooves 17a, 17b, 17c. The rotary operation shaft 3 can be positioned at high-speed, intermediate (manual), and low-speed positions by mechanically fitting.

A handle 18 is fixed in the vicinity of the end of the rotary operation shaft 3 projecting outward from the base 1 in the axial direction, and a handle fixing mechanism 19 is attached so as to be movable in the axial direction. .

That is, the handle fixing mechanism 19 is provided with the rotation operating shaft 3
A groove 19a is provided on the peripheral surface of the handle 18 in the shape of an arc in the axial direction. On the other hand, a boss 18a of the handle 18 is provided with a steel ball 19c and a spring in a hole 19b formed at a right angle to the rotary operation shaft 3.
The interior of 19d is equipped with a retaining pin 19e, which is screwed in,
As a result, the steel ball 19c is repelled and engaged with the concave groove 19a so as to be disengageable in the axial direction.
The groove 19a is formed at a right angle in the axial direction and is engaged with the steel ball 19c, so that the handle 18 is fixed to the rotary operation shaft 3 in the axial direction.

In addition, the handle 18 has its boss portion 18a attached to the base 1
It is fitted and supported by the boss portion 1a, and is fixed so as to be rotatable about the axis and not to move in the axis direction.

Further, a first knob 20 and a second knob 21 are attached to the protruding ends of the rotary operation shaft 3 protruding outward from the handle 18.

That is, the first knob 20 is provided with a recess 20b continuously on the outer side of the shaft hole 20a formed through the center of the first knob 20.
Is mounted on the inside of the protruding end portion of the rotary operation shaft 3 so as to interpose a slide / engagement means 22 so as to be slidable by a predetermined stroke in the axial direction.

Here, the slide / engagement means 22 is provided with a concave groove 22a on the outer surface of the rotary operation shaft 3 in the axial direction, while a pin 22b is fitted to the boss portion of the first knob 20. The tip of the pin 22b is formed so as to be slidable in the recessed groove 22a in the axial direction and fixed in the axial direction. The sliding distance of the pin 22b in the groove 22a is set to be equal to the distance between the grooves 17a and 17b.

The second knob 21 is formed to have an outer size that can be removably fitted into the recess 20b of the first knob 20, and is fixed to the outer end of the rotary operation shaft 3 by a fixing pin 23 or the like. I am allowed. In addition, from the left end position of the first knob 20 to the handle
The distance to the right end position where it abuts 18 is set to be equal to the distance between the concave grooves 17b and 17c.

Further, a rack 25 is provided between the rotary operation shaft 3 and the table 26.
A feed means 25 including a and a pinion 25b is provided. By rotating the rotary operation shaft 3 in the forward / reverse direction, the table 26 is fed to the right and left. In addition,
The polishing unit 24 performs a descending feed operation and an ascending feed operation.

Here, the polishing section 24 has a motor and a speed reducer (not shown) housed in the housing 24a, as in a known polishing machine, and the grinding wheel 24b is driven and rotated by the motor.

Thus, in the above structure, FIG. 1 shows a state in which the steel ball 1 is held in the neutral position (manual position).
7e is engaged, clutch pin 10 is both clutch 5,
6 is held at an intermediate position that does not engage with any of the above.

On the other hand, the first knob 20 has a pin 22b of the slide / engaging means 22.
Is located on the side of the handle 18 that engages with the rotary operation shaft 3, and is separated from the second knob 21.

In the neutral position, since the rotation of the motor 15 is not transmitted to the rotary operation shaft 3, the handle 18 can be manually rotated, whereby the table 26 is manually moved to the left and right through the feeding means 25. be able to.

When the second knob 21 is pushed in the axial direction from the neutral position, the second knob 21 is pushed into the recess 20b of the first knob 20 and comes into contact with the bottom surface thereof to stop. Since the 1 knob 20 is not moved and only the rotary operation shaft 3 is pressed and moved to the right in FIG. 1, the steel ball 19c is disengaged from the groove 19a of the handle fixing mechanism 19 and rides on the shaft to rotate. The fixation with the operation shaft 3 is released. Similarly, the clutch pin 10 is also moved to the right to engage with the low speed clutch 6 to be in the low speed position.

Further, at this time, since the steel ball 17e is engaged with the concave groove 17a of the positioning mechanism 17 of the rotary operation shaft 3, the rotary operation shaft 3 is positioned at the low speed position and does not naturally move in the axial direction.

Therefore, the rotation of the motor 15 is performed by the intermediate gear 14, the pinion 13 with the shaft,
Since it is transmitted to the rotary operation shaft 3 via the intermediate gear 12, the low speed clutch 6 and the clutch pin 10, the table 26 is fed at a low speed.

At this time, the handle 18 is not rotated.

When the first knob 20 is pulled outward from the low speed position, the pin 22b of the slide / engagement means 22 contacts the front end edge of the concave groove 22a, so that the rotary operation shaft 3 slides leftward in the drawing and snaps. The ring 16 stops when it hits the gear case side wall 2a, and the steel ball 17e is engaged with the other recessed groove 17c of the positioning mechanism 17, so that the rotary operation shaft 3 is held in that position. Since 10 is engaged with the high speed clutch 5 and is in the high speed position, the rotation of the motor 15 is performed by the intermediate gear 14, the shaft-equipped pinion 13, the intermediate gear 11, the clutch 5,
Since it is transmitted to the rotary operation shaft 3 via the clutch pin 10, the table 26 is fed at a high speed.

Even at this position, the handle 18 does not rotate because it is not fixed to the rotary operation shaft 3.

Further, in this position, the second knob 21 is fitted in the recess 20b of the first knob 20, so that the first knob is moved from the high speed position.
Push 20 in the axial direction to bring it into contact with handle 18,
22b slides in the concave groove 22a and then engages with the rotary operation shaft 3, so that the rotary operation shaft 3 is naturally pressed and slid to the right. As a result, the clutch pin 10 is disengaged from the high speed clutch 5, and the neutral position of FIG. (Manual operation position).

[Advantages of the Invention] Since the speed change operation mechanism of the polishing machine according to the present invention is configured as described above, one end of the rotary operation shaft 3 is
By arranging the first knob 20 and the second knob 21 for switching between high speed, manual operation and low speed on the same axis, the operability of the above three steps can be improved, and the first knob 20 is pushed in the axial direction so that it can slide together. Since the first knob 20 is engaged with the rotary operation shaft 3 by the joining means 22 and is brought into contact with the outer surface of the handle 18 and stopped, the manual position can be switched to the high speed, manual and low speed positions. In addition to the above, it is possible to switch to a manual position, which is a neutral position, and to perform positioning at the same position more reliably, and the clutch mechanism is a mesh between the pin 10 and the meshing portions 5a and 6a. Therefore, the rotation transmission can be surely performed, and the structure is particularly simple, so that the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a shifting operation mechanism of a polishing machine according to the present invention, and FIG. 2 is a front view of a polishing machine equipped with the same operating mechanism. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Gear case 3 ... Rotation operation shaft, 5, 6 ... Clutch 10 ... Clutch pin, 18 ... Handle 19 ... Handle fixing mechanism 20 ... 1st knob, 21 ... 2nd knob 22 ... Slide and engagement means 24 … Polishing part, 25… Feeding means

Claims (1)

[Scope of utility model registration request] 1. A gear shifting operation mechanism of a polishing machine, which is provided so that a table 26 can be fed to the left and right via a feeding means 25, and is rotatable about a base 1 and a gear case 2 and slidable in an axial direction. A pinion that is provided with an operating shaft 3 and is always engaged even if the rotating operating shaft 3 moves in the axial direction
25b and the rack 25a constitute the feeding means 25, and the motor
Low speed clutch 6 in which drive of 15 is transmitted by gear engagement
Also, the high speed clutch 5 is loosely fitted to the rotary operation shaft 3, and the engagement pin 6a of the low speed clutch 6 and the meshing part 5a of the high speed clutch 5 are provided with disengageable clutch pins 10 respectively. Positioning for fixing the clutch pin 10 to a low speed position in which the low speed clutch 6 is engaged, a manual position in which the low speed and high speed clutches are not engaged, and a high speed position in which the high speed clutch 5 is engaged. A mechanism 17 including concave grooves 17a, 17b and 17c provided at one end of the rotary operation shaft 3,
A positioning mechanism 17 which is provided in the gear case 2 and includes a steel ball 17e that engages with the recessed grooves 17a, 17b, 17c.
Is provided, and the clutch pin 10 is provided on the other end side of the rotary operation shaft 3.
Is fixed to the manual position during positioning, and the clutch pin 10 is attached to the low speed position or high speed position so that the clutch pin 10 can be released from the fixing during positioning.
22a is provided, a first knob 20 is externally mounted on the rotary operation shaft 3, and a pin 22b fitted to the first knob 20 is engaged with the concave groove 22a, so that the first knob 20 is axially moved. A second knob 21 is fixedly provided at the other end of the rotary operation shaft 3 so as to be slidable for a predetermined stroke, and a moving distance from a manual position of the clutch pin 10 to a low speed position where the low speed clutch 6 is engaged, The moving distance from the manual position to the high speed position for engaging the high speed clutch 5, the distance between the concave grooves 17a and 17b, the distance between the concave grooves 17b and 17c, and the inside of the concave groove 22a of the pin 22b. And the contact surface between the handle 18 side end surface of the first knob 20 and the handle 18 side contact surface when the pin 22b contacts the handle 18 side end surface of the concave groove 22a at the high speed position. The gear shifting operation mechanism of the polishing machine is characterized in that the distance is equal to the distance.