JP2542132Y2 - Disk blade grinding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a disk blade grinding device for grinding a disk blade used in a mower or the like.

[Conventional technology and issues to be solved]

As a disk blade used in a mower, for example, an eight-blade in which an outer peripheral portion of a disk is divided into eight and blades are formed in a radial direction is used. As shown in FIG. 13, this type of disk blade 1 has a blade 2 formed in the radial direction, a clearance 3 is formed between the blades 2 by an arc, and the blade 2 and the relief 3 are connected to each other. Has a structure formed in an arc shape in order to increase the strength of the blade 2.

For such a grinding of the disk blade 1, a grinding device dedicated to an eight-blade for a mower is provided. In this grinding apparatus, as shown in FIG. 14, in order to form a continuous portion 4 between the blade 2 and the relief 3 in an arc shape, the outer peripheral portion of the grinding wheel 5 is finished in an arc shape by a dresser, and The grinding wheel 5 is rotated and pressed against the disk blade 1.
For this reason, the grinding wheel 5 is ground according to its shape. However, when grinding is performed at a plurality of locations, the outer peripheral portion of the grinding wheel 5 is worn, and the grinding wheel 5 must be frequently repaired. Further, since the grinding wheel 5 is pressed against the continuous portion 4 of the disk blade 1 for grinding, the continuous portion 4 is glowed red by frictional heat, and the strength of the disk blade 1 becomes brittle at the continuous portion 4. There was a problem.

Further, the blade 2 of the disk blade 1 contributes to cutting of grass and the like at a point of several mm of the tip of the blade 2, so that the shorter the length of the blade 2, the better the strength. . For this reason, it is preferable to grind the blade 2 according to the length of the blade 2, but there is no such a grinding device.

Therefore, the present inventor can grind the continuous portion 4 in an arc shape without forming the outer peripheral portion of the grinding wheel 5 in an arc shape with a dresser, and obtain a disk blade grinding device that does not cause the continuous portion 4 to glow red. As a result of intensive research, the present invention has been achieved.

[Means for solving the problem]

The gist of the disk blade grinding device according to the present invention is as follows.
A rotary fixed base for fixing and rotating the disk blade at the shaft center, a fixed angle rotating means for rotating the disk blade fixed to the rotary fixed base in one direction by a fixed angle, and an axis of the rotary fixed base A grinding device provided with a grinding wheel that is substantially moved back and forth in the direction and is mounted at an arbitrary angle with respect to the disk blade and that is driven to rotate, and the rotation fixing table when the grinding device is at least approached to the disk blade. Biasing means for biasing the grinding device in a direction away from the rotating device, and a rotation fixed table which is interlocked with the rotation of the grinding device at a constant angle by the constant angle rotating device, thereby rotating the grinding device against the biasing force of the biasing device. A link device that regulates the back-and-forth movement in substantially the axial direction, and the restriction by the link device is released, and the grinding device is fixed to the rotation fixing table by the urging force of the urging means. In that a quick return means disengaging from the panel edge.

Further, in the disc blade grinding device of the present invention, the link device is constituted by a rotating arm that is rotated by a fixed angle rotating means, and a connecting rod that connects the rotating arm and the grinding device, The length of the rotating arm can be adjusted arbitrarily.

[Action]

According to the disk blade grinding device of the present invention, the disk blade fixed to the rotary fixed table is ground by the grinding wheel of the grinding device to form a linear blade. After the blade is formed, the grinding device is instantaneously separated from the disk blade by the quick return means, and the disk blade is prevented from being red-heated due to frictional heat accompanying the grinding.

Further, by providing such a disk blade grinding device with a constant angle rotating means and a link device, the disk blade fixed to the rotation fixed base is rotated in a single direction by a constant angle by the constant angle rotating means, and the link device is used to rotate the disk blade. In conjunction with the rotation by the constant angle rotating means, the grinding device is moved substantially in the axial direction of the rotation fixed table, that is, the disk blade. Therefore, the grinding device is moved substantially in the axial direction of the rotation fixed table with respect to the disk blade fixed to the rotation fixed table and rotated by a constant angle by the constant angle rotating means, and the grinding device is moved relative to the disk blade. Thus, an arc having a center different from the rotation center of the rotation fixed base is drawn. After the relief portion of the disk blade is ground in an arc by the grinding device, the rotation of the disk blade rotated by a predetermined angle is stopped, and the grinding device is separated from the disk blade by the above-described quick return means. The rotation of the disc blade is separated from the disc blade by the quick return means at the same time as or slightly earlier than the rotation of the disc blade which has been rotated by the constant angle rotating means, and the rotational movement of the disc blade and the grinding apparatus Due to the component force of the linear motion, the continuous portion between the arc-shaped relief of the disk blade and the linear blade is ground into an arc shape. Since this operation is performed instantaneously, the continuous portion between the blade and the escape is not glowed by frictional heat.

Further, in a device in which the link device is constituted by a rotating arm and a connecting rod, and the grinding device connected to the connecting rod is moved in accordance with the amount of rotation of the rotating arm,
By arbitrarily adjusting the length of the rotating arm, the amount of movement of the grinding device can be arbitrarily changed to change the length of the disk blade to be ground and the curvature of the arc-shaped relief.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2, reference numeral 10 denotes a disk blade grinding device according to the present invention, and the disk blade grinding device 10 is mounted on a steel base 12 so as to be appropriately carried and installed at any position. It is configured. As shown in FIG. 3, a lower end of a frame 16 is slidably fitted in the plurality of grooves 14 provided in the base 12. Reference numeral 17 indicates that the frame 16 has a groove.
This is a pin to prevent the pin from falling out of 14. On the other hand, a turntable 18 provided on the base 12 is pivotally supported so as to be able to turn around a shaft 20.

The disk-shaped member provided on the frame 16 is a rotation fixed base 22, and the rotation fixed base 22 is a disk blade indicated by a two-dot chain line in the figure.
The shaft 24 can be screwed and fixed by a screw 28 via a holding plate 26 at an axial center thereof so as to be fixed. On the other hand, a shaft 30 is protruded from the shaft center of the rotation fixed base 22, and the shaft 30 is supported by a hole provided in the frame 16.
A disk blade 24 fixed to 22 is rotated about a shaft 30.

On the other hand, the rotating table 18 provided on the base 12 has a grinding device 32
The grinding device 32 is mounted on the turntable 18 around the shaft 20.
And the rotation fixed table 22, that is, the disk blade 24
Can be moved back and forth substantially in the axial direction. The grinding device 32 has a grinding wheel driven and rotated by a motor.
34, and a steel disc blade with its grinding wheel 34
24 is ground and polished. The grinding device 32 is attached to the turntable 18 via a support jig 38 at an arbitrary angle corresponding to the inclination of the blade 36 formed on the disk blade 24. A spring 39 is provided in the vicinity of the turntable 18, and when the turntable 18 is turned in the direction of the rotation fixed stand 22, one end of the spring 39 and the turntable 18 are engaged. At the same time, a force is exerted in a direction to push the turntable 18 back.

A rotation lever 40 is rotatably mounted on the shaft 30 of the rotation fixed base 22, and an auxiliary member 42 that is integrally rotated with the rotation lever 40 is provided with a spring 44 in the direction of the rotation fixed base 22. Is attached. On the other hand, engaging grooves are provided at equal intervals on the outer peripheral portion of the disk-shaped rotation fixed base 22.
48 are formed. The engagement groove 48 is a pivot lever 40 in FIG.
When the lever is rotated clockwise, the engagement lever 46 and the engagement groove 48
Are engaged, rotate the rotation fixed base 22 clockwise,
Conversely, when the rotation lever 40 is rotated counterclockwise, the engagement between the engagement lever 46 and the engagement groove 48 is released. A stopper member 50 is provided on the upper surface of the frame 16.
The stopper member 50 is engaged with the engagement groove 48 of the rotation fixing base 22 when the rotation lever 40 is rotated clockwise as shown by a two-dot chain line in FIG. Abuts a part of the engagement lever 46 which is rotated by
Is restricted. These rotating levers
The fixed angle rotating means is constituted by the engagement lever 40, the engagement lever 46, the stopper member 50, and the like.

Further, on the upper surface of the frame 16, an engagement arm 54 urged in the direction of the rotation fixed base 22 by a spring 52 is provided. The engagement groove 48 can be engaged with the engagement groove 48 at the position stopped by. Therefore, after the rotation fixed base 22 is rotated clockwise by the rotation lever 40 and the rotation is stopped by the stopper member 50, the rotation
When is returned to the original position, the engagement arm 54 and the engagement groove 48 are engaged with each other, so that the rotation fixed base 22 does not reverse.

A first swing arm 56 extends from the auxiliary member 42 that is rotated integrally with the rotation lever 40, and one end of the first swing arm 56 is connected to the second swing arm 58. It is engaged with the long hole 60. The second swing arm 58 is swingably mounted on a shaft 62 different from the shaft 30, and the shaft 62 is fixed to the base 12. Secondly, a pivot arm 64 extends from the swing arm 58 with the shaft 62 interposed therebetween.
At the top, a pin 66 is protruded from the shaft 62 at a predetermined position.

On the other hand, one end of a connecting rod 68 is pivotally supported on the rotating table 18 of the grinding device 32, and a pin 66 of the rotating arm 64 is fitted into a hook groove 70 formed at the other end of the connecting rod 68. And the rotating arm 64 and the rotating table 18 are connected by a connecting rod 68. The other touch of the connecting rod 68 is provided with a tension coil spring 72, which pulls the turntable 18 in the direction of the rotation fixed table 22 through the connection rod 68, and is shown in an enlarged scale in FIG. Thus, the hook groove 70 is urged to the engaging position X with respect to the pin 66 of the rotating arm 64. Also, the connecting rod 68 is provided with an engaging member 74,
The engagement member 74 and the second swing arm 58 can be engaged.

In this configuration, as shown in FIG. 4, when the rotating lever 40 is rotated clockwise,
The second swing arm 58 and the swing arm 64 are swung by the first swing arm 56 that is swung integrally with the
The connecting rod 68 connected by the pin 66 is pulled. The turning table 18 is turned by the connecting rod 68, and the turning table 18 is pulled in the direction of the rotation fixed table 22 against the urging force of the engaged spring 39. Accordingly, while the second swing arm 58 and the rotating arm 64 are rotated from the original position shown in FIG. 5 to the position shown in FIG. The disk blade 24 is the engagement lever
46 allows the same angle to rotate. Meanwhile,
The grinding device 32 is pulled together with the rotation table 18 by the connecting rod 68 in the direction of the rotation fixed table 22 in conjunction with the rotation of the rotation lever 40, and the clearance 76 of the disk blade 24 is ground in an arc shape by the grinding device 32. You.

As shown in FIG. 6, the second swing arm 58
When the connecting rod 68 is slightly rotated counterclockwise around the engaging member 74, the engagement between the hook groove 70 and the pin 66 is released. Is done. The connecting rod 68 is instantaneously returned to the position shown by the two-dot chain line in the figure against the urging force of the tension coil spring 72 by the spring 39, and the grinding device 32 is separated from the disk blade 24. In this operation, the grinding device 32 is detached from the disk blade 24 while grinding the arc-shaped continuous portion and the linear blade 36 following the clearance 76 of the disk blade 24.

As is clear from the above description, by rotating the rotating lever 40 by a fixed angle, the disk blade 24 is rotated.
Relief 76 followed by an arc-shaped continuation and straight blade 36
Can be ground. Therefore, by repeatedly rotating the rotating lever 40 by the number of blades of the disk blade 24,
The grinding of the disk blade 24 can be completed.

In FIG. 1, reference numeral 78 denotes a handle.
Numeral 78 moves the frame 16 along the groove 14 of the base 12. By operating the handle 78, it is possible to immediately cope with the grinding of the disk blades 24 having different outer diameters.

Although the embodiment of the present invention has been described in detail, the present invention can be implemented in other forms.

For example, a configuration may be adopted in which the length of the rotation arm in the link device can be arbitrarily changed. As an example, as shown in FIGS. 7 to 9, in the second swing arm 80 and the swing arm 82 which is integrally rotated with the second swing arm 80, the swing arm 82 rotates around the shaft 84. It comprises a rotating member 86 to be moved, an adjusting screw 88 for rotating the rotating member 86, and a pin 66 to be engaged with the hook groove 70 of the connecting rod 90. In this example, as shown in FIG. 9, the turning member 86 is turned by adjusting the adjusting screw 88, so that the distance between the shaft 62 and the pin 66 can be arbitrarily changed. Accordingly, the radius of curvature drawn by the pin 66 about the axis 62 changes, and the amount of movement of the grinding device 32 moved by the connecting rod 90 changes. With this, the disk blade
The length of the 24 blades 36 can be arbitrarily set.

In addition, as shown in FIGS.
In order to release the engagement between the pin 66 of the pin 82 and the hook groove 70 of the connecting rod 90, an engaging projection 92 and an engaging member 94 may be provided on the second swing arm 80 and the connecting rod 90, respectively. Engagement member in this example
Reference numeral 94 denotes a position at which the engagement between the pin 66 and the hook groove 70 is released even when the rotating member 86 is arbitrarily rotated. ) Is almost constant.

Further, not only the quick return means is constituted by the pin and the hook groove as described above, but also, for example, as shown in FIG.
And the pin 100 to be engaged with the cam 98 is moved to the turntable 1
It is also possible to arrange it on the lower surface of 8 to configure. In this example, when the second swing arm 96 is turned clockwise, the cam 98 pulls the turntable 18 in the direction of the rotation fixed stand 22, and the pin 100 comes to the Y portion of the cam 98. When the turntable 18 is instantaneously returned to the original position and the second swing arm 96 is turned counterclockwise, the pin 100 passes through the second groove 102 of the cam 98. In this embodiment, the quick return means is the Y portion of the cam 98, and the link device is constituted by the second swing arm 96, the cam 98, the pin 100, and the like.

In addition, the quick return means may be constituted by an electromagnetic device using a magnet, a solenoid, or the like, in addition to a mechanical device.

In addition, the disc blade grinding device according to the present invention can grind not only the eight blades shown in the figure but also any number of disc blades. For example, a disk blade 104 as shown in FIG. 11 can be immediately ground by using a blade positioning jig 106.

Further, a guide for sliding the frame 16 with respect to the substrate 12 may be constituted by attaching a guide plate 108 to the substrate 12 as shown in FIG. 12 in addition to the groove 14 shown in FIG. Is natural.

In addition, although not shown one by one, the rotation fixed base 22
Although the engaging groove 48 is provided on the outer periphery of the plate, the plate for fixing the disk blade 24 and the plate for providing the engaging groove can be formed as separate members, and the rotation fixing table 22 can be replaced as desired The rotation fixing base 22 having a different number of engagement grooves may be appropriately replaced. Further, the shape of each component and the method of urging with a spring or the like can be changed as appropriate, and the present invention is based on the knowledge of those skilled in the art, and various additions, modifications, and variations are made without departing from the spirit of the invention. It can be carried out in a form.

[Effect of the invention]

Since the disk blade grinding device of the present invention is provided with the quick return means, when the predetermined grinding operation is completed, the grinding device is immediately detached from the disk blade, and the disk blade is not heated red.

Further, by providing the fixed angle rotating means and the link device, the arc-shaped relief of the disk blade can be ground only by rotating the rotating lever, thereby greatly improving workability. In addition, the combined use of the quick return means enables the arc-shaped continuous portion and the linear blade to be instantly ground following the escape of the disk blade.

Further, by making it possible to arbitrarily change the length of the rotating arm in the link device, it becomes possible to arbitrarily set the curvature of the escape of the disk blade and the length of the blade, and also to a disk blade having a different shape. The present invention has an excellent effect, such as being able to immediately compete against the king.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a disk blade grinding device according to the present invention, and FIG. 2 is a front sectional view of the embodiment device shown in FIG. FIG. 3 is a perspective view of an essential part for explaining a frame sliding mechanism in the apparatus shown in FIG.
FIG. 4 is an explanatory diagram for explaining the operation of the device shown in FIG. 1 by crushing the main parts thereof. FIG. 5 is an enlarged plan view of an essential part of the quick return means of the apparatus shown in FIG. 1, and FIG. 6 is a plan view of an essential part for explaining the operation of the quick return means shown in FIG. is there. 7 and 8 are plan views showing a quick return means and a link device according to another embodiment of the present invention, and FIG. 9 is an explanatory view showing an operation by enlarging a main part in FIG. is there. FIG. 10, FIG. 11, and FIG. 12 are explanatory views for explaining another embodiment of the present invention. FIG. 13 is a plan view showing an example of a disk blade, and FIG. 14 is a plan view of a main part for describing a conventional technique. 10; disk blade grinding device 18; rotating table 22; rotating fixed table 24,104; disk blade 32; grinding device 34; grinding wheel 40; rotating lever 46; engaging lever 48; engaging groove 50; stopper member 54; Joint arm 56; first swing arm 58, 80, 96; second swing arm 64, 82; rotating arm 66; pin 68, 90; connecting rod 70; hook groove 74, 94; engagement member 92 ; Engagement projection 98; cam

Claims (2)

(57) [Scope of request for utility model registration] 1. A fixed rotation table for fixing and rotating a disk blade at the shaft center, a fixed angle rotating means for rotating the disk blade fixed to the fixed rotation table in one direction by a fixed angle, and the rotation. A grinding device having a grinding wheel that is moved back and forth substantially in the axial direction of the fixed base and is mounted at an arbitrary angle with respect to the disk blade and is driven to rotate; and when the grinding device is at least approached to the disk blade. Urging means for urging the grinding device in a direction away from the rotation fixing table; and interlocking with rotation at a constant angle by the constant angle rotating means, the grinding device resists the urging force of the urging means. And a link device for restricting the rotation of the rotary table so as to move back and forth substantially in the axial direction. The link device is released from the restriction, and the grinding device is rotated and fixed by the urging force of the urging means. Disc blade grinding apparatus being characterized in that a quick return means disengaging from the fixed disk blade platform. 2. The link device comprises: a rotating arm that is rotated by a fixed angle rotating means; and a connecting rod that connects the rotating arm and a grinding device. The length of the rotating arm can be arbitrarily set. 2. The disk blade grinding apparatus according to claim 1, wherein the apparatus can be adjusted.