CN223442440U - Trimming machine - Google Patents

Abstract

The utility model relates to a trimming machine equipped with a cutting tool. The trimming machine includes a housing, a motor disposed within the housing, an output shaft driven by the motor, and a clamping device mounted on the output shaft. The clamping device is connected to the cutting tool and moves axially along the output shaft to clamp or release the cutting tool. The clamping device includes a connecting portion connected to the output shaft. The output shaft has a mating portion connected to the connecting portion. The inner surface of the mating portion is provided with an internal thread segment, and the outer surface of a portion of the connecting portion is provided with an external thread segment. The mating portion and the connecting portion are threadedly connected. The utility model has an internal thread segment on the inner surface of the mating portion and an external thread segment on the outer surface of a portion of the connecting portion, so that the mating portion and the connecting portion are directly connected by threading. The structure is simple, the cutting tool can be effectively clamped, and the user can save more effort when tightening.

Description

Trimming machine

[ Technical field ]

The utility model relates to an edge trimmer, in particular to an edge trimmer for occasions such as decoration, construction and the like.

[ Background Art ]

The edge trimmer is a power work for driving the output unit to rotate by the driving unit so as to carry out machining operation on workpieces such as wood and the like, and has an irreplaceable position in industries such as construction, decoration and the like. The clamping device is usually arranged on the output shaft of the edge trimmer, and after a user applies clamping force, the cutter can be fixed on the output shaft, so that the operations of trimming, polishing and the like required by the edge trimmer are realized.

In the prior art trimmer, refer to Chinese patent No. CN211029867U, issued 7/17 in 2020, which discloses a trimmer comprising a motor unit and a self-locking clamp connected to the motor unit and having a cutter mounted thereon. The clamp of the trimming machine comprises the knob, the bushing, the clamp head, the spiral spring and other parts, the parts are more and are complicated to install, part parts are easy to fall off when the clamp head is detached or the tool is replaced, the user rotates the knob relative to the bushing, the clamp head is adjusted to a locking position by the aid of the clamp head, the clamp head is locked by large force in actual operation, the trimming machine works under the condition that the tool is easy to be in an unclamped state, machined surfaces are rough or damaged to replace machined parts, and operation safety is low.

In view of the above, it is desirable to provide an improved edger that overcomes the shortcomings of the prior art.

[ Summary of the invention ]

Aiming at the defects of the prior art, the utility model aims to provide the trimming machine which is firm in clamping and simple in structure.

The trimming machine comprises a machine shell, a motor, an output shaft and a clamping device, wherein the motor is arranged in the machine shell, the output shaft is driven by the motor in a rotating mode, the clamping device is installed on the output shaft and connected with the cutter, the clamping device moves axially along the output shaft so as to clamp or loosen the cutter, the clamping device comprises a connecting portion connected with the output shaft, the output shaft is provided with a matching portion connected with the connecting portion, the inner surface of the matching portion is provided with an inner thread section, the outer surface of part of the connecting portion is provided with an outer thread section, and the matching portion is in threaded connection with the connecting portion.

The matching part is further provided with a first guide part which is contracted in the radial direction from the inner edge, the connecting part is provided with a second guide part which extends from the external thread section, the second guide part is funnel-shaped, and the first guide part is combined with the second guide part.

The clamping device further comprises an operation part protruding from the second guide part, wherein the operation part is provided with at least two flat operation surfaces, and the at least two flat operation surfaces are parallel.

The further improvement is that the length of the external thread section is larger than the sum of the length of the second guiding part and the length of the operating part.

The further improvement scheme is that the length of the operating part is not less than 3mm.

The clamping device further comprises an inner hole axially penetrating through the connecting portion and an opening recessed from the outer peripheral surface of the connecting portion, the cutter is mounted in the inner hole, and the opening is communicated with the inner hole.

The clamping device is provided with a locking position for locking the cutter and an unlocking position for releasing the cutter, wherein in the locking position, the opening is contracted, the connecting part clamps the cutter, in the unlocking position, the opening is opened, and the cutter is separated from the connecting part.

The further improvement scheme is that the number of the openings is at least 3, and the openings are uniformly distributed on the connecting part.

The further improvement scheme is that the length of the internal thread section is longer than that of the external thread section.

Compared with the prior art, the utility model has the beneficial effects that the internal thread section is arranged on the inner surface of the matching part, the external thread section is arranged on the outer surface of the part of the connecting part, the matching part and the connecting part are directly connected in a threaded manner, the structure is simple, the cutter can be effectively clamped, and the user can save more labor when screwing. The clamping device is further provided with an inner hole which axially penetrates through the connecting part and an opening which is recessed from the outer peripheral surface of the connecting part, the cutter can be conveniently replaced by adjusting the shrinkage and expansion states of the opening, and in addition, the operating part is provided with at least two flat operating surfaces which are parallel to each other, so that the balance of the trimmer under high-speed operation is ensured.

[ Description of the drawings ]

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

FIG. 1 is a schematic view of an edger of the present utility model;

FIG. 2 is a schematic cross-sectional view of the edger of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a portion of the structure of the edger of FIG. 1;

FIG. 4 is a schematic illustration of a clamping device of the edger of FIG. 3;

Fig. 5 is a schematic cross-sectional view of a clamping device of the edger of fig. 3.

Detailed description of the preferred embodiments

The utility model will be described in further detail with reference to the drawings and embodiments.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Words such as "upper", "lower", "front", "rear", etc., indicating an azimuth or a positional relationship are based on only the azimuth or the positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus/elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Referring to fig. 1 to 3, an embodiment of the present utility model relates to an edge trimmer 100, and the edge trimmer 100 is used for trimming, grooving and other processing operations on workpieces such as wood. The trimmer 100 includes a housing 1, a motor 2 provided in the housing 1, an output shaft 3 rotationally driven by the motor 2, and a holding device 4 attached to the output shaft 3, and a cutter (not shown) is attached to the holding device 4. Under the action of the driving source, the motor 2 drives the output shaft 3 to rotate, when a user performs machining operation, the base (not shown) of the edge trimmer 100 is abutted against the substitute workpiece, and the edge trimmer is moved according to a required track, so that the cutter trims the working surface of the substitute workpiece.

In the present embodiment, the clamping device 4 has a locking position for locking the tool and an unlocking position for releasing the tool, so that the clamping device 4 can be moved axially along the output shaft 3 for clamping or unclamping the tool. Specifically, the clamping device 4 further includes an inner hole 44 penetrating the connecting portion in the axial direction and an opening 42 recessed from the outer peripheral surface of the connecting portion 41, the cutter is mounted to the inner hole 44, and the opening 42 communicates with the inner hole 44. Further, the number of the openings 42 is at least 3, and the openings 42 are uniformly distributed on the connecting portion 41, so that after the clamping device 4 is pressed, the diameter of the inner hole 44 is gradually reduced along with the shrinkage of the openings 42, so that a user can more save labor when screwing up, and the tool can be effectively clamped.

Referring to fig. 2 and 3, the clamping device 4 includes a connecting portion 41 connected to the output shaft 3, the output shaft 3 has a mating portion 31 connected to the connecting portion 41, an internal thread section 311 is disposed on an inner surface of the mating portion 31, an external thread section 411 is disposed on an outer surface of a portion of the connecting portion 41, and the mating portion 31 is screwed with the connecting portion 41. The connecting portion 41 is directly mounted to the mating portion 31 via the external thread section 411, so that the structure is simple, fastening parts such as nuts are reduced, and convenience in tool replacement by a user is improved.

In the present embodiment, the mating portion 31 further has a first guiding portion 312 radially shrinking from the inner edge, the connecting portion 41 has a second guiding portion 412 extending from the external thread section 411, the second guiding portion 412 is funnel-shaped, and the first guiding portion 312 is combined with the second guiding portion 412, so that the tool can be better positioned when being mounted, and a user can insert the tool into the mating portion 31 quickly. The second guide portion 412 is funnel-shaped, so that the contraction force can be axially converted along the clamping device 4.

Specifically, in the locked position, i.e., the coupling portion 31 and the connecting portion 41 are in a coupled state, the second guide portion 412 receives a force to shrink the opening 42, the diameter of the inner hole 44 becomes smaller, the connecting portion 41 clamps the tool, and in the unlocked position, i.e., the coupling portion 31 and the connecting portion 41 are in a decoupled state, the force applied to the second guide portion 412 is released, thereby reducing the force applied to the opening 42, the opening 42 is opened, the diameter of the inner hole 44 becomes larger, and the tool is disengaged from the connecting portion 41. In the present embodiment, the user can quickly attach the tool to the edger 100 by operating the clamp device 4 to switch between the locked position and the unlocked position, and the tool can be replaced without requiring an unnecessary process.

Further, the length of the internally threaded section 311 is greater than the length of the externally threaded section 411, with sufficient installation travel to better grip the tool.

Referring to fig. 4 and 5, the clamping device 4 further includes an operation portion 43 protruding from the second guiding portion 412, and when the user operates the tool such as a wrench to rotate the operation portion 43, the tool can be switched from the locked position to the unlocked position, so as to facilitate the replacement of the tool. Specifically, the operation portion 43 has at least two flat operation surfaces 431, and the two flat operation surfaces 431 are parallel to each other, so that the wrench is convenient to clamp, and the user can apply a better force. The number of the flat operation surfaces 431 is preferably even, and 2, 4, 6, or the like may be used. In the present embodiment, the number of the flat operation surfaces 431 is 6, so that the user can rotate the operation portion 43 using the wrench in a plurality of ways and angles, and on the other hand, the 6 flat operation surfaces can be formed in a two-to-two symmetrical state, which is advantageous for balancing the edge trimmer 100 in a high-speed operation.

In the present embodiment, the length of the operation portion 43 is not less than 3mm, and a certain operation space is provided for tools such as a wrench, so that a user can quickly replace the tool, the time is shortened, and the use efficiency is improved.

Specifically, the length of the external thread section 411 is greater than the sum of the length of the second guiding portion 412 and the length of the operating portion 43, so as to increase the stress area for clamping the tool, avoid the phenomenon that the tool is not clamped or loosened during working, and improve the use safety of users.

The present utility model is not limited to the above-described embodiments. Those of ordinary skill in the art will readily appreciate that many alternatives to the edger of the present utility model are possible without departing from the spirit and scope of the present utility model. The protection scope of the present utility model is subject to the claims.

Claims (9)

1. The edge trimmer is provided with a cutter and comprises a machine shell, a motor, an output shaft and a clamping device, wherein the motor is arranged in the machine shell, the output shaft is rotationally driven by the motor, the clamping device is installed on the output shaft and connected with the cutter, the clamping device moves axially along the output shaft so as to clamp or loosen the cutter, and the edge trimmer is characterized in that the clamping device comprises a connecting part connected with the output shaft, the output shaft is provided with a matching part connected with the connecting part, the inner surface of the matching part is provided with an inner thread section, the outer surface of part of the connecting part is provided with an outer thread section, and the matching part is in threaded connection with the connecting part.

2. The edger of claim 1 wherein the mating portion further has a radially tapered first guide portion from the inner edge, the connecting portion having a second guide portion extending from the male threaded section, the second guide portion being funnel-shaped, the first guide portion being joined to the second guide portion.

3. The edger of claim 2 wherein the clamping arrangement further includes an operating portion projecting from the second guide portion, the operating portion having at least two flat operating surfaces, at least two of the flat operating surfaces being parallel.

4. The edger of claim 3 wherein the length of the male thread segment is greater than the sum of the length of the second guide portion and the length of the operator.

5. The trimmer of claim 3, wherein the length of the operating portion is not less than 3mm.

6. The trimmer of claim 1 wherein said clamping means further comprises an inner bore extending axially through said connecting portion and an opening recessed from an outer peripheral surface of said connecting portion, said cutter being mounted to said inner bore, said opening being in communication with said inner bore.

7. The edger of claim 6 wherein the clamp has a locked position locking the blade in which the opening is contracted and an unlocked position releasing the blade in which the connecting portion clamps the blade, and an unlocked position in which the opening is opened and the blade is disengaged from the connecting portion.

8. The trimmer of claim 7, wherein the number of openings is at least 3 and the openings are uniformly distributed in the connecting portion.

9. The edger of claim 1, wherein the length of the female thread segments is greater than the length of the male thread segments.