Disposable woodworking tool

Abstract

A disposable woodworking tool includes a cutter bar and a locking piece, the front end of the cutter bar installed with a cutting head, while the tail end of the cutter bar is installed with a connecting long sleeve. The tail end of the cutter bar includes a tail end installation part fixedly connected with the connecting long sleeve via a locking piece in a detachable manner. The cutter bar includes planes along the length direction extending to the position, where the cutting head is installed, on the front end of the cutter bar, and the locking piece utilizes the principle of a spring collet. In use, instant switching of the angle of the cutting head can occur through switching of planes, without a tool. Rapid replacement of the cutter bar can occur.

Claims

1. A disposable woodworking tool, comprising: a cutter bar, wherein a front end of the cutter bar is installed with a cutting head, and a tail end of the cutter bar is installed with a connecting long sleeve; and a locking piece, wherein the locking piece comprises a cutter bar locking external clamp and a cutter bar locking internal clamp which is connected with the cutter bar locking external clamp, and a mounting hole is formed in the cutter bar locking external clamp; wherein the cutter bar comprises: a tail end installation part that is fixedly connected with the connecting long sleeve via the locking piece in a detachable manner; and a plurality of planes along a length direction of the cutter bar, and the planes extend to a position, where the cutting head is installed, on the front end of the cutter bar, wherein the planes comprise a first plane, a second plane and a third plane which are connected in sequence, the second plane is in parallel with an upper surface of the cutting head, and an angle formed between the first plane and the second plane as well as an angle formed between the second plane and the third plane are both in a range of 130 to 150, and a shaft axis of the mounting hole is perpendicular to the second plane.

2. The woodworking tool of claim 1, wherein the tail end installation part is arranged eccentrically to an axis of the cutter bar.

3. The woodworking tool of claim 1, wherein an accommodation cavity for accommodating the tail end installation part is arranged along an axis of the locking piece; the cutter bar locking external clamp comprises a rotary twist part and an external cone, wherein the external cone includes clamping jaws for centering contraction, the cutter bar locking internal clamp comprises a fixed part and an internal cone which coordinates with the external cone, the fixed part being connected with the connecting long sleeve; the rotary twist part is twistable manually to make the external cone be close to the internal cone tightly, and the clamping jaws of the external cone are contracted under the compression from the internal cone, thereby fastening the locking cutter bar.

4. The woodworking tool of claim 3, wherein an outer surface of the locking piece is provided with an anti-slippery part.

5. The woodworking tool of claim 1, wherein a positioning piece for preventing axial rotation of the cutter bar is disposed between the cutter bar and the locking piece.

6. The woodworking tool of claim 5, wherein the positioning piece comprises a locating bulge arranged on the cutter bar and a positioning groove which is arranged on the locking piece and corresponds to the positioning bulge.

7. The woodworking tool of claim 5, wherein the connecting long sleeve is sleeved with a rubber cartridge.

8. The woodworking tool of claim 7, wherein the connecting long sleeve is internally provided with a counterweight cabin, and the tail end of the connecting long sleeve is provided with an end cover.

9. The woodworking tool of claim 1, wherein the cutting head is installed on the front end of the cutter bar via fastening screws.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural schematic diagram of an existing woodworking tool;

(2) FIG. 2 is a sectional schematic diagram of the woodworking tool in FIG. 1 in A-A direction;

(3) FIG. 3 is a structural schematic diagram of the woodworking tool in an embodiment of the subject matter herein;

(4) FIG. 4 is a structural schematic diagram of the cutter bar in FIG. 3;

(5) FIG. 5 is a structural schematic diagram of a viewing angle of the opposite surface of the cutter bar shown in FIG. 4;

(6) FIG. 6 is a structural schematic diagram of the cutter bar provided with three planes in an embodiment of the subject matter herein;

(7) FIG. 7 is a structural schematic diagram of a viewing angle of the opposite surface of the cutter bar shown in FIG. 6;

(8) FIG. 8 is a sectional schematic diagram of D-D direction in FIG. 7;

(9) FIG. 9 is a sectional schematic diagram of C-C direction in FIG. 7;

(10) FIG. 10 is a schematic diagram of the three-dimensional structure of the cutter bar locking external clamp in an embodiment of the disclosure herein;

(11) FIG. 11 is a main-view structural schematic diagram of the cutter bar locking external clamp in FIG. 10;

(12) FIG. 12 is a sectional schematic diagram of the cutter bar locking external clamp in FIG. 11 in A-A direction;

(13) FIG. 13 is a left view of the cutter bar locking external clamp;

(14) FIG. 14 is a right view of the cutter bar locking external clamp;

(15) FIG. 15 is a schematic diagram of the three-dimensional structure of the cutter bar locking internal clamp in an embodiment of the subject matter herein;

(16) FIG. 16 a main-view structural schematic diagram of the cutter bar locking internal clamp in FIG. 15;

(17) FIG. 17 is a sectional schematic diagram of the B-B direction in FIG. 16; and

(18) FIG. 18 is a structural schematic diagram of the installation position of the side operating handle in an embodiment of the disclosure herein.

DETAILED DESCRIPTION

(19) In order to more clearly understand the above objectives, features and advantages of the disclosure herein, the disclosure herein will be further described below in combination with the example drawings described briefly above and the embodiments herein. As to the positional relationship between the front end and the tail end in the present embodiment, the end which is installed with a cutting head is taken as a front end, while the other end is taken as a tail end; in the following description, specific details are illustrated to fully understand the disclosure herein, however, the disclosure herein can also be implemented in other ways different from those described herein, therefore, the disclosure herein is not limited to the specific embodiments disclosed below.

(20) With FIG. 3 as a reference, the embodiment provides a disposable woodworking tool which includes a cutter bar 1 and a locking piece 4, wherein the front end of the cutter bar is installed with a cutting head 2, and the tail end of the cutter bar 1 is installed with a connecting long sleeve 3, the cutter bar further includes a tail end installation part 11 which is fixedly connected with the connecting long sleeve 3 via the locking piece 4 in a detachable manner; refer to FIG. 4 to FIG. 5, a plurality of planes (13, 14, 15) are arranged on the cutter bar 1 along the length direction of the cutter bar 1, the planes extend to the position 12, where the cutting head is installed, on the front end of the cutter bar, in the using process, if the angle of the cutting head 2 needs to be switched, the instant switching of the angle of the cutting head 2 can be realized only by handholding one of the planes and attaching the plane to a tool holder arranged in a woodworking lathe, therefore, the operation is convenient and rapid. Meanwhile, the planes extend to the position 12, where the cutting head is installed on the front end of the cutter bar, the structural design of the plane enables a nearest distance between the fulcrum of the cutter bar and the force-bearing point of the cutting head, thereby realizing the requirement of stabilizing the tool, enlarging the processing range, and improving the processing precision.

(21) In the present embodiment, the length of the plane runs through the entire cutter bar 11. Refer to FIG. 6 through FIG. 9, the front end of the planes extend to the position 12, where the cutting head is installed, on the front end of the cutter bar, while the tail end of the planes extend to the tail end of the cutter bar, so that the operation is convenient. For example, the planes in the present embodiment are preferably 3, which include a first plane 13, a second plane 14 and a third plane 15 which are connected in sequence, and the angle a formed between the first plane 13 and the second plane 14 as well as the angle a formed between the second plane and the third plane are both in a range of 130-150, and the angle a in the present embodiment is preferably 141. In these three planes, the second plane is a reference plane and is also the most commonly used plane. The second plane is in parallel with the upper surface of the cutting head, and is also in parallel with the busbar on the surface of the workpiece, the switching of the angle means the change of the anterior angle of the tool, which plays a significant role in fine grinding of the curved surface of the workpiece. Of course, the number of the planes can also be six, the angle formed between each plane is 120, and the change in the setting forms and angles of other multiple planes also cannot be excluded in terms of ensuring operation stability and high turning precision.

(22) In the present embodiment, the tail end installation part 11 is set eccentrically to the axis of the cutter bar 1, ensuring no interference with the tail end installation part and increasing the turning stability of the cutter bar. Refer to FIGS. 8 and 9, the design is improved in the present embodiment after repeated experiments, whether the tail end installation part 11 should be eccentric to the axis of the cutter bar 1 has been verified for many times. When the diameter of the cutter bar 1 is constant, the width of the three planes is of the maximum value when the formed angle is 141, and the width of the plane is 8 mm to 9 mm, thereby increasing the stability of the tool. In order to widen the planes without interfering the tail end installation part 11 to avoid influencing the operation, the tail end installation part 11 should be set to be eccentric to the axis of the cutter bar 1 by 2.5 mm, then a space for milling the planes is reserved, thereby realizing the objective that the width is large after the planes are milled and achieving better turning precision. When different planes are switched, the angle of the cutting head is also switched, thereby realizing instant switching of the angle of the cutting head with no use of any tool and satisfying the requirement on different turning angles.

(23) Preferably, the locking piece 4 includes a cutter bar locking external clamp 41 and a cutter bar locking internal clamp 42 which is connected with the cutter bar locking external clamp 41, and as to the connecting mode, a threaded connection mode is adopted, namely, an internal thread 423, which is in match with the external thread 415 of the cutter bar locking external clamp 41, is arranged at one end of the cutter bar locking internal clamp 42; a fixed part 421 on the other end is provided with an external thread in match with the internal thread of the connecting long sleeve 3, and an accommodation cavity 43 for accommodating the tail end installation part 11 is arranged along the axis of the locking piece 4; refer to FIG. 10 through FIG. 14, the cutter bar locking external clamp 41 includes a rotary twist part 411 and an external cone 412, wherein the external cone 412 includes clamping jaws 413 capable of centering contraction, the clamping jaws 413 are formed after the external cone 412 is cut open, and the number of the clamping jaws in the present embodiment is four. Refer to FIG. 15 through FIG. 17, the cutter bar locking internal clamp 42 includes a fixed part 421 and an internal cone 422 which cooperates with the external cone 412, and the fixed part 421 is connected with the connecting long sleeve 3 via a thread; the structure of the locking piece 4 adopts the structural principle form similar to that of a spring collet, when the rotary twist part 411 of the cutter bar locking external clamp 41 is rotated with hands, the clamping jaws 413 of the external cone 412 are subjected to centering contraction, so as to fasten the tail end installation part 11 of the cutter bar, otherwise, the cutter bar 1 is loosened, thereby realizing rapid replacement of the cutter bar 1. In the process of processing parts, the user can prepare three or more cutter bars installed with different shapes of cutter bars for standby use, and then the cutting head and the cutter bar can be replaced rapidly when a kind of tool is used in operation, so that the operation is smoother and saves more time.

(24) In order to facilitate the assembly and disassembly of the cutter bar 1, an anti-slippery part is arranged on the outer surface of the locking piece 4, namely, anti-slippery stripes 416 are arranged outside the cutter bar locking external clamp 41 and the cutter bar locking internal clamp 42, such as the adoption of knurling treatment or the addition of an anti-slippery sleeve, so as to increase friction and facilitate rotary twist.

(25) In addition, in order to enhance the tightness and use effect of the cutter bar 1 and prevent the axial rotation of the cutter bar 1, a positioning piece 5 for preventing the axial rotation of the cutter bar 1 is further arranged between the cutter bar 1 and the locking piece 4, so as to effectively increase the turning precision and prolong the service life of the tool. The positioning piece 5 in the present embodiment includes a positioning bulge and a positioning groove 52 which is corresponding to the positioning bulge, the positioning bulge and the positioning groove 52 are arranged on the inner wall of the edge of the front end of the cutter bar tail end installation part 11 and the inner wall of the edge of the front end of the cutter bar locking external clamp 41, respectively, and the specific positional relationship can be set with reference to the position relationship indicated by the reference number 5 in FIG. 3, reference number 16 in FIG. 4 and reference number 52 in FIG. 10. Of course, the set position of the positioning bulge and the positioning groove 52 can be exchanged, e.g., the positioning groove is formed on the cutter bar while the positioning bulge is arranged on the cutter bar locking external clamp, as long as the positioning can be realized. To facilitate processing, in the present embodiment, the positioning bulge adopts the form of a screw which is in threaded connection with the cutter bar, namely, a screw hole 16 is arranged on the front end of the tail end installation part 11 of the cutter bar, a pin can also be adopted, and a positioning groove 52 can be arranged on the inner wall of the edge of the front end of the cutter bar locking external clamp 41, of course, other forms can also be adopted and these will not be described in detail herein. In addition, the cutting head 2 is installed in a screw hole 21 on the front end of the cutter bar 1 via a fastening screw, the cutting head 2 can be replaced separately, or the cutter bar 1 and the cutting head 2 can also be replaced together, therefore, the structural design is simple and the operation is convenient.

(26) A mounting hole 414 is formed in the cutter bar locking external clamp 41, and the shaft axis of the mounting hole 414 is vertical to the plane in which the second plane 14 is located. When a hook is required during the processing of complex shapes, to facilitate operation, a side operating handle 6 is arranged on the woodworking tool, as shown in FIG. 18, the side operating handle 6 is installed on the installation hole 414 according to the demand of actual operation. In the present embodiment, the side operating handle 6 is installed on the cutter bar locking external clamp 41, thereby ensuring the operating linkage of the cutting head, the planes and the side operating handle. As to the installation mode, a thread fixed connection mode or other modes can be adopted. When a hook is required for processing complex shapes, the side operating handle 6 can be held by another hand to improve the operating stability, and through setting the mounting hole 414, the functions of the woodworking tool are increased.

(27) In order to enhance the comfort of hand feeling, increase friction and improve the performance of safe operation, the connecting long sleeve 3 is sheathed with a rubber cartridge 31, and the connecting long sleeve 3 is internally provided with a counterweight cabin, the counterweight cabin is internally provided with a counterweight block, the tail end of the connecting long sleeve is provided with an end cover 32, and the end cover is provided with threaded holes for installing the counterweight block, so as to achieve the counterweight effect and improve the operation stability.

(28) In the disclosure herein, the structure of the locking piece can also adopt other forms, e.g., the locking piece includes a cutter bar casing and a fastening screw, wherein the cutter bar casing is fixedly connected with the connecting long sleeve, when the cutter bar is replaced, the tail end installation part on the tail end of the cutter bar is inserted into the cutter bar casing, and is fixed via the fastening screw, when the cutter bar is replaced, the fastening screw is twisted off for replacement, and is fixed by rotary twist after the replacement. The locking piece can also be connected by the threads which coordinate with each other, namely, an external thread is arranged on the tail end of the cutter bar, an internal thread is arranged on the front end of the connecting long sleeve, through locking the threaded hole by rotary twist, the cutter bar is connected with the connecting long sleeve, and the locking piece can also adopt other forms, which will not be described in detail herein. The woodworking tool in the disclosure herein adopts such materials as high-speed steel and carbon steel, therefore, the abrasion resistance is favorable and the operating stability is high.

(29) The above embodiments are merely preferred embodiments of the subject matter herein, rather than limiting the disclosure herein in other forms. Those skilled in the art can utilize the technical contents disclosed above to alter or modify the embodiments into equivalent embodiments with equivalent changes to be applied in other fields, however, any simple amendment, equivalent changes or modifications made to the above embodiments based on the technical essence of the disclosure herein without departing from the content of the technical solution in the disclosure herein shall all fall within the protection scope of the technical solution of the disclosure herein.