Cutting mechanism of knife saw
A technology of knife saw and motion conversion mechanism, which is applied to metal sawing equipment, sawing machine devices, and other motorized reciprocating sawing machines, and can solve the problems that orbital cutting knife saws cannot be operated properly.
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no. 1 example
[0052] see Figure 7 , The knife saw according to the first embodiment of the present invention includes a motor 1 housed in a motor casing 2 of resin. A handle 3 is connected to the rear end of the motor housing 2 . The handle 3 accommodates a switch 4 for controlling the power supply to the motor 1 .
[0053] see Figure 7 , 8, 9 and 10, an aluminum inner cover 5 and a gear cover 6 are connected to the front end of the motor housing 2. A power transmission mechanism (to be described later) is accommodated in the inner cover 5 and the gear cover 6 . The motor 1 has an output shaft 7 whose end forms a driving gear 8 . A second shaft 9 extends parallel to the motor shaft 7 . A driven gear 10 is mounted on the second shaft 9 . The driven gear 10 meshes with the driving gear 8 . The rotational force generated by the motor 1 is transmitted from the motor shaft 7 to the second shaft 9 through the driving gear 8 and the driven gear 10 . The motor 1 then turns the second shaf...
no. 2 example
[0072] The second embodiment of the present invention is similar to the first embodiment except that guide rail 23A replaces guide rail 23 . The rails 23A are consistent with each other. Therefore, only one guide rail 23A will be described in detail below. Such as Figure 18 As shown, rail 23A has upper and lower arms formed with upper and lower inclined surfaces 23c and 23d, respectively, which form rail recesses. During operation of the knife saw, the relevant roller 22 reciprocates while being in contact with and moving along the upper inclined surface 23c or the lower inclined surface 23d of the guide rail 23A. The upper inclined surface 23c has a corrugated profile. The lower inclined surface 23d has a serrated profile. The upper and lower inclined surfaces 23c and 23d serve as a guide surface or engagement surface.
[0073] Figure 19 The movement of the saw blade 27 is shown, which occurs in this case: the roller 22 reciprocates while contacting and moving along t...
no. 3 example
[0076] The third embodiment is similar to the first embodiment except for some design changes mentioned later.
[0077] see Figure 21 and 22 , The rear portion of the plunger 20 in the third embodiment of the present invention has an upper and a lower radially extending protrusion 33, which are diametrically opposed to each other. The protrusion 33 extends through the axially extending elongated hole 32 on the guide sleeve 31 . The upper and lower rails 34 are fixedly clamped between the inner cover 5 and the gear cover 6 . The guide rail 34 extends generally in the axial direction of the plunger 20 . The guide rails 34 are diametrically opposed to each other with respect to the plunger 20 . The upper rail 34 has an inclined surface (guide surface or engaging surface) with which the upper protrusion 33 of the plunger 20 can contact and engage. The lower rail 34 has an inclined surface (guide surface or engagement surface) with which the lower protrusion 33 of the plunger...
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