Trimming knife

Abstract

The utility model relates to the field of milling cutters, in particular to a trimming cutter. Comprising a cutter bar which is divided into a first bar body and a second bar body, one end of the first bar body is connected with a cutter head, the other end of the first bar body is provided with a mounting cavity, a threaded part used for connection is arranged in the mounting cavity and can axially slide, and a reset spring is further arranged between the threaded part and the first bar body; a connecting hole in threaded connection with the threaded part is formed in the end part of the second rod body; tooth parts which are mutually embedded are arranged on the abutting faces of the first rod body and the second rod body, and the two sides of each tooth part are inclined faces. According to the utility model, the cutting edge is prevented from being damaged due to strong collision between the cutting edge and the iron nail.

Description

Technical Field

[0001] The utility model relates to the field of milling cutters, in particular to a trimming cutter. Background Art

[0002] A trimming knife is a tool specifically used to trim and finish the edges of wood, and is often used in fine woodworking projects.

[0003] There are two types of trimming knives: flat edge knives. The channel is to place the flat edge knife vertically with the blade set vertically.

[0004] When the trimming knife cuts a foreign object, such as a residual nail, the torsional force may cause the blade to collide strongly with the nail, resulting in damage to the blade.

[0005] Therefore, there is an urgent need to provide an improved technical solution to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a trimming knife that can prevent jamming in order to solve the above-mentioned technical problems.

[0007] In view of this, the utility model provides a trimming knife, comprising:

[0008] The cutter bar is divided into a first rod body and a second rod body. One end of the first rod body is connected to the cutter head, and the other end is provided with a mounting cavity. A threaded portion for connection is provided in the mounting cavity, and the threaded portion can slide axially. A return spring is also provided between the threaded portion and the first rod body.

[0009] The end of the second rod body is provided with a connection hole threadedly connected to the threaded portion;

[0010] The contact surfaces of the first rod body and the second rod body are provided with teeth that fit in with each other, and both sides of the teeth are inclined surfaces.

[0011] Furthermore, the teeth are arranged in a uniform circumferentially continuous array.

[0012] Furthermore, the cutter head includes:

[0013] A knife body, which is connected to a knife rod;

[0014] The blades are symmetrically arranged on both sides of the blade body, and the diameter of the cutting arc surface of the blade is the same as the diameter of the blade rod.

[0015] Furthermore, it also includes:

[0016] The auxiliary roller is rotatably arranged on the top of the cutter head, and the diameter of the auxiliary roller is equal to the diameter of the cutter rod.

[0017] Furthermore, the blade is made of alloy material.

[0018] The beneficial effects of the utility model are:

[0019] 1. When the trimming knife of the present invention cuts a foreign object, such as a residual nail, the torsional force may cause a strong collision between the blade and the nail, resulting in damage to the blade. Because trimming is a further repair process of cutting burrs on the already processed surface, the cutting amount is small and the actual torsional force required by the trimming knife is not strong. Therefore, the first rod body and the second rod body can be rotated synchronously by the engagement between the teeth. When encountering debris such as a nail that may block the rotation of the trimming knife, the teeth are disengaged from each other through the inclined surface, so that the second rod body and the first rod body rotate and stop respectively, and a sound is emitted to remind the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic structural diagram of the second rod body of the present invention;

[0022] Figure 3 This is a schematic structural diagram of the first rod body of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the cross section of the knife bar of the present utility model.

[0024] The marks in the figure are:

[0025] 1. First rod; 2. Second rod; 3. Cutting head; 4. Mounting cavity; 5. Threaded portion; 6. Return spring; 7. Connecting hole; 8. Tooth portion; 9. Auxiliary roller. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0027] Example 1:

[0028] This embodiment provides a trimming knife, comprising:

[0029] The cutter bar is divided into a first rod body 1 and a second rod body 2. One end of the first rod body 1 is connected to the cutter head 3, and the other end is provided with a mounting cavity 4. A threaded portion 5 for connection is provided in the mounting cavity 4, and the threaded portion 5 can slide axially. A return spring 6 is also provided between the threaded portion 5 and the first rod body 1.

[0030] The end of the second rod body 2 is provided with a connecting hole 7 threadedly connected to the threaded portion 5;

[0031] The contact surfaces of the first rod body 1 and the second rod body 2 are provided with teeth 8 that fit in with each other, and both sides of the teeth 8 are inclined surfaces.

[0032] The first rod body 1 is connected to the cutter head 3 as an integral part, and the second cutter rod is used to connect to the main shaft of the driving device. The connection method is the existing technology and can be conventionally replaced. It is not described in detail. A mounting cavity 4 is provided in the middle position of the end face of the first rod body 1 opposite to the cutter head 3. The longitudinal cross-section of the mounting cavity 4 is T-shaped, and a pre-mounting port and a mounting block are provided in the mounting cavity 4. The pre-mounting port and the mounting block are used to install the threaded portion 5 in the mounting cavity 4. The opening method is set according to actual conditions and is not described in detail. The threaded portion 5 has two parts. One end of the threaded portion 5 is provided with a flange extending toward the periphery, and the flange is arranged in a mounting cavity 4 with a large diameter. In addition to the outer side of the flange, the threaded portion 5 is provided with an external thread, and a reset spring 6 for resetting the threaded portion 5 is provided between the flange and the inner end surface of the mounting cavity 4, and mutually engaged teeth 8 are provided on the contact surfaces of the first rod body 1 and the second rod body 2, and the two sides of the teeth 8 are inclined surfaces. During installation, the threaded portion 5 is screwed into the connecting hole 7 until the teeth 8 on the end faces of the first rod body 1 and the second rod body 2 contact.

[0033] Working principle:

[0034] When the trimming knife cuts a foreign object, such as a residual nail, the torsional force may cause a strong collision between the blade and the nail, resulting in damage to the blade. Because trimming is a further repair process for cutting burrs on the already processed surface, the cutting amount is small and the actual torsional force required by the trimming knife is not strong. Therefore, the first rod body 1 and the second rod body 2 can be rotated synchronously by the engagement between the teeth 8. When encountering debris such as a nail that may block the rotation of the trimming knife, the teeth 8 are disengaged from each other through the inclined surface, so that the second rod body 2 and the first rod body 1 rotate and stop respectively, and a sound is emitted to remind the operator.

[0035] The above structure can prevent the blade from strongly colliding with the nail, thereby preventing the blade from being damaged.

[0036] Example 2:

[0037] This embodiment provides a trimming knife, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0038] The teeth 8 are arranged in a continuous array uniformly around the circumference.

[0039] The operating frequency of the structure is stabilized by the uniform circumference of the teeth 8 .

[0040] Example 3:

[0041] This embodiment provides a trimming knife, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0042] The cutter head 3 includes:

[0043] A knife body, which is connected to a knife rod;

[0044] The blades are symmetrically arranged on both sides of the blade body, and the diameter of the cutting arc surface of the blade is the same as the diameter of the blade rod.

[0045] By making the diameter of the cutting arc of the blade the same as the diameter of the tool rod, when cutting, the tool rod and the blade are simultaneously pressed against the cutting surface. Under the limit of the tool rod, the blade always moves along the surface to prevent cutting off materials other than the burrs.

[0046] Example 4:

[0047] This embodiment provides a trimming knife, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0048] Also includes:

[0049] Auxiliary roller 9: The auxiliary roller 9 is rotatably arranged on the top of the cutter head 3, and the diameter of the auxiliary roller 9 is equal to the diameter of the cutter rod.

[0050] The auxiliary roller 9 can add a limit point on the side of the blade opposite to the knife rod, and there are limit points on both sides of the blade, so that the feeding direction of the blade is a vertical plane (when the blade body is placed vertically), making the cutting more stable.

[0051] The blade is made of alloy.

[0052] Increase blade strength.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which fall within the scope of protection of this application.

Claims

1. A trimming knife, comprising a knife head (3) and a knife bar, characterized in that: include: The knife rod is divided into a first rod body (1) and a second rod body (2). One end of the first rod body (1) is connected to the knife head (3), and the other end is provided with a mounting cavity (4). A threaded portion (5) for connection is provided in the mounting cavity (4), and the threaded portion (5) can slide axially. A return spring (6) is also provided between the threaded portion (5) and the first rod body (1). The end of the second rod body (2) is provided with a connection hole (7) threadedly connected to the threaded portion (5); Mutually engaged teeth (8) are provided on the contact surfaces of the first rod body (1) and the second rod body (2), and both sides of the teeth (8) are inclined surfaces.

2. The trimming knife according to claim 1, characterized in that: The teeth (8) are arranged in a continuous array with a uniform circumference.

3. The trimming knife according to claim 1, characterized in that: The cutter head (3) comprises: A knife body, which is connected to a knife rod; The blades are symmetrically arranged on both sides of the blade body, and the diameter of the cutting arc surface of the blade is the same as the diameter of the blade rod.

4. The trimming knife according to claim 1, characterized in that: Also includes: An auxiliary roller (9) is rotatably arranged on the top of the cutter head (3), and the diameter of the auxiliary roller (9) is equal to the diameter of the cutter rod.

5. The trimming knife according to claim 3, characterized in that: The blade is made of alloy.

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