WO2022052525A1

WO2022052525A1 - Cutter

Info

Publication number: WO2022052525A1
Application number: PCT/CN2021/097611
Authority: WO
Inventors: 郭定云
Original assignee: 浙江维朋制冷设备有限公司
Priority date: 2020-09-14
Filing date: 2021-06-01
Publication date: 2022-03-17
Also published as: CN213053018U

Abstract

A cutter, comprising a frame (1) and a blade base (2), a base body (3), a leadscrew (4) all arranged on the frame (1), the leadscrew (4) is rotatably connected to the frame (1), the blade base (2) and the base body (3) are distributed along the axial direction of the leadscrew (4), a blade (5) is rotatably arranged at an upper part of the blade base (2), a rolling body (6) is correspondingly rotatably arranged at an upper part of the base body (3), and the blade base (2) and the base body (3) are both slidably connected to the frame (1); the leadscrew (4) comprises a first threaded segment (4a) and a second threaded segment (4b) having opposing directions of rotation and distributed along the axial direction of the leadscrew (4), a first threaded hole meshing with the first threaded segment (4a) is arranged as passing through a lower portion of the blade base (2), and a second threaded hole meshing with the second threaded segment (4b) is arranged as passing through a lower portion of the base body (3).

Description

a cutting knife

technical field

The utility model belongs to the technical field of machinery, and relates to a cutting knife, in particular to a cutting knife used for cutting pipe fittings.

Background technique

A pipe cutter is a cutting tool for pipes.

The existing pipe cutter, such as a quick-adjustment pipe cutter disclosed in the Chinese Patent Library (application number: 201721209217.9), includes a cutter housing, a feed screw and a quick-adjustment assembly; wherein, the feed screw is described in the The cutter housing moves upward; the quick adjustment assembly includes a locking member, a locking spring and an unlocking handle; the locking member has a thread adjacent to the feed screw, and the thread engages with the feed screw; the locking One end of the other side of the piece is rotatably connected with the cutter housing, and has a locking piece gear; the locking spring is arranged between the other end and the cutter housing; the unlocking handle and the housing are It is rotatably connected and has an unlocking gear that meshes with the locking member gear; when the unlocking handle is rotated, the unlocking gear drives the locking member gear to rotate, the locking spring is compressed by force, and the locking member and the Feed screw separation.

technical problem

When the above-mentioned cutter is used, manually rotate the screw to drive the moving frame to move, and cooperate with the fixed frame to clamp the pipe. Since the fixed frame is in a fixed state, the movement of the moving frame requires several turns of the screw, which affects the efficiency and the use experience.

technical solutions

The purpose of this utility model is to solve the above-mentioned problems in the existing technology, and proposes a kind of cutting knife that is easy to use and has high efficiency.

The purpose of the utility model can be achieved by the following technical solutions: a cutting knife, comprising a bracket and a knife seat, a seat body and a lead screw arranged on the bracket, the lead screw and the bracket are rotatably connected, and the knife seat and the seat body are along the lead screw. Axial distribution, the upper part of the tool seat rotates with a blade, and the upper part of the seat body is correspondingly rotated with a rolling body. Sliding up; the type of lead screw is a bidirectional lead screw, the lead screw includes a thread segment 1 and a thread segment 2 that are distributed along the axis of the lead screw and rotate in opposite directions, and the lower part of the tool seat is provided with a thread that engages with the thread segment 1. In the first hole, the lower part of the seat body is provided with a second threaded hole which is engaged with the second thread segment.

A two-way screw is arranged, and the tool seat and the seat body are respectively engaged with the thread section 1 and the second thread section of the lead screw, so that when the screw rotates, the tool seat and the seat body move toward or away from each other, so that the tool seat and the seat body move towards each other. The space for holding the pipe is formed faster and has higher efficiency. At the same time, the whole operation becomes easier by reducing the number of turns of the lead screw.

In the above-mentioned cutting knife, there is a limit structure between the knife seat and the seat body for limiting the minimum distance formed after the two slide toward each other, so as to limit the relative movement distance of the knife seat and the seat body, so as to prevent the blade and the rolling body from moving towards each other. collision, effectively protect the blade.

In the above-mentioned cutting knife, a strip-shaped chute is formed on the bracket, the length of the chute extends along the axial direction of the screw, and the notch of the chute is upwardly arranged, and the lower part of the knife seat and the seat body are provided with the sliding groove. A slot-matching and generally square-shaped slider that slides within the slot. The above design has the advantages of simple structure and convenient installation.

In the above-mentioned cutting knife, the lead screw is arranged in the chute, and the outer end of the lead screw extends out of the chute, and the above-mentioned threaded hole 1 and threaded hole 2 are both arranged on the corresponding sliding block, so as to reduce the gap between the components. The distance makes the whole structure compact.

In the above-mentioned cutting knife, the limiting structure is located in the chute, so that the structure of the cutting knife is more compact.

In the above-mentioned cutting knife, the limiting structure includes a block body 1 formed on the knife seat and a block body 2 formed on the seat body, and the block body 1 and the block body 2 are arranged facing each other and distributed along the axial direction of the lead screw, and Block one and block two can touch together.

As another solution, in the above-mentioned cutting knife, the limit structure includes a limit block formed on the inner wall of the chute, the length of the limit block extends along the axial direction of the screw, and the two ends of the limit block can be respectively connected with the seat body. and the knife holder.

In the above-mentioned cutting knife, the bracket includes a front half shell and a rear half shell that are fixed together and are both strip-shaped. The above-mentioned chute is formed. The inner wall of the chute at the notch is formed with a convex strip. The length of the convex strip extends along the axial direction of the screw. There are two convex strips and are symmetrically arranged along the center of the chute. Two grooves are formed between the two grooves for the two protruding strips to slide through, and two grooves are formed between the base and the corresponding slider for the two convex strips to slide through respectively. Improve work stability and accuracy.

In the above-mentioned cutter, the front half shell and the rear half shell are fixedly connected by screws, and the axis of the screw is perpendicular to the axis of the lead screw.

beneficial effect

Compared with the prior art, the cutter has the following advantages:

1. Set a two-way screw and the tool seat and the seat body are respectively engaged with the thread segment 1 and the thread segment 2 of the lead screw, so that when the screw rotates, the tool seat and the seat body move toward or away from each other, so that the tool seat and the seat body move towards each other. The space formed between the bodies for holding the pipe fittings is formed faster and has higher efficiency. At the same time, the whole operation becomes easier by reducing the number of turns of the lead screw.

2. There is a limit structure between the tool seat and the seat body to limit the minimum distance formed after the two slide toward each other, which is used to limit the relative movement distance of the tool seat and the seat body, so as to prevent the collision between the blade and the rolling body and effectively protect the blade .

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the cutter.

Fig. 2 is a schematic cross-sectional structure diagram of a cutter.

FIG. 3 is a schematic diagram of the connection structure of the tool holder and the bracket.

In the figure, 1, bracket; 1a, chute; 1b, front half shell; 1c, rear half shell; 1d, convex strip; 1e, screw; 2, knife seat; 2a, block one; 3, seat body; 3a, Block two; 4, lead screw; 4a, thread segment one; 4b, thread segment two; 5, blade; 6, rolling body; 7, slider; 8, hand wheel.

BEST MODE FOR CARRYING OUT THE INVENTION

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in FIG. 1 and FIG. 2 , the cutter includes a bracket 1 , a knife seat 2 , a seat body 3 and a lead screw 4 arranged on the bracket 1 . The lead screw 4 and the bracket 1 are rotatably connected, and in this embodiment, both ends of the lead screw 4 are rotatably connected to the bracket 1 through bearings. The tool seat 2 and the seat body 3 are distributed along the axial direction of the screw 4 , the upper part of the tool seat 2 is rotated with a blade 5 , and the upper part of the seat body 3 is provided with a rolling body 6 correspondingly.

In this embodiment, the blade 5 is installed as follows: a shaft body is fixed on the blade holder 2, the axis of the shaft body is perpendicular to the axis of the lead screw 4, the blade 5 has a central hole for the shaft body to pass through, and the blade 5 and the shaft body They are connected in rotation by bearings.

The rolling body 6 is installed as follows: a rotating shaft is fixed on the seat body 3, the axis of the rotating shaft is perpendicular to the axis of the lead screw 4, the rolling body 6 is a bearing, and the inner ring of the bearing is fixedly connected with the rotating shaft. In the actual product, there are two rotating shafts arranged up and down, and the above-mentioned rolling elements 6 are rotated on each rotating shaft, and the number of rolling elements 6 is determined according to the actual product, which can be one, two, three and so on.

Both the tool seat 2 and the seat body 3 are slidably connected with the bracket 1 so that the tool seat 2 and the seat body 3 can slide in the axial direction of the screw 4, and the sliding arrangement of the tool seat 2 and the seat body 3 is as follows: There is a bar-shaped chute 1a, the length of the chute 1a extends axially along the lead screw 4, and the slot of the chute 1a is set upward, and the lower parts of the tool seat 2 and the seat body 3 have matching and The slider 7 is substantially square, and the slider 7 is slidably arranged in the chute 1a.

Further description, as shown in Fig. 2 and Fig. 3 , the bracket 1 includes a front half-shell 1b and a rear half-shell 1c that are fixed together and are both strip-shaped. Vertical, and the above-mentioned chute 1a is formed between the front half shell 1b and the rear half shell 1c. A protruding strip 1d is formed on the inner wall of the chute 1a at the notch, and the length of the protruding strip 1d extends axially along the lead screw 4. There are two protruding strips 1d and are symmetrically arranged along the center of the chute 1a. The knife seat 2 and the corresponding slider Two grooves 1 are formed between 7 for the two protruding strips 1d to slide through, and two grooves are formed between the base body 3 and the corresponding slider 7 for the two protruding strips 1d to slide through, so that the knife base 2 and the corresponding sliding block 7 are respectively formed. The seat body 3 slides more stably to improve working stability and precision. The front half shell 1b and the rear half shell 1c are fixedly connected by screws 1e, and the axis of the screw 1e is perpendicular to the axis of the lead screw 4 . In this embodiment, there are two screws 1e which are distributed along the axial direction of the lead screw 4 .

As shown in FIG. 2 , the lead screw 4 is arranged in the chute 1 a , and the outer end of the lead screw 4 extends out of the chute 1 a and is connected with a hand wheel 8 to facilitate the rotation of the lead screw 4 . The type of the lead screw 4 is a bidirectional lead screw 4. The lead screw 4 includes a thread segment one 4a and a thread segment two 4b that are distributed along the axial direction of the lead screw 4 and rotate in opposite directions. A threaded hole 1 engaged with 4a, the lower part of the base body 3 is provided with a threaded hole 2 engaged with the second threaded segment 4b. A two-way screw 4 is provided and the tool seat 2 and the seat body 3 are respectively engaged with the thread segment one 4a and the thread segment two 4b of the lead screw 4, so that when the lead screw 4 rotates, the tool seat 2 and the seat body 3 move towards each other or face each other. The movement makes the space formed between the knife base 2 and the base body 3 for clamping the pipe to be formed faster, and at the same time with higher efficiency, the whole operation becomes easier by reducing the number of turns of the lead screw 4 .

Among them, the first threaded hole and the second threaded hole are arranged on the corresponding sliding block 7, so as to reduce the distance between each component and make the whole structure compact.

There is a limit structure between the tool seat 2 and the seat body 3 to limit the minimum distance formed after the two slide toward each other, which is used to limit the relative movement distance of the tool seat 2 and the seat body 3 to prevent the blade 5 and the rolling body 6 from colliding , effectively protect the blade 5. In this embodiment, the limiting structure is located in the chute 1a, and the limiting structure includes a block body 1 2a formed on the tool seat 2 and a block body 2 3a formed on the seat body 3, the block body 1 2a and the block body 1 The second block 3a is disposed facing each other and distributed along the axial direction of the lead screw 4, and the first block 2a and the second block 3a can abut against each other.

Embodiment 2

The structure and principle of the second embodiment are basically the same as those of the first embodiment. The difference is that the limit structure includes a limit block formed on the inner wall of the chute 1a, and the length of the limit block extends along the axial direction of the lead screw 4, and The two ends of the limit block can be respectively abutted against the base body 3 and the tool base 2 .

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but will not deviate from the spirit of the present invention or go beyond the appended claims the defined range.

Claims

A cutting knife, comprising a bracket (1), a knife seat (2) arranged on the bracket (1), a seat body (3) and a lead screw (4), the lead screw (4) and the bracket (1) being rotatably connected, The tool seat (2) and the seat body (3) are distributed along the axial direction of the screw (4). The upper part of the tool seat (2) is rotated and provided with a blade (5), and the upper part of the seat body (3) is correspondingly rotated with a rolling body (5). 6), characterized in that the tool seat (2) and the seat body (3) are both slidably connected with the bracket (1) so that the tool seat (2) and the seat body (3) can slide in the axial direction of the screw (4) ; The type of the lead screw (4) is a bidirectional lead screw (4), the lead screw (4) includes a thread segment one (4a) and a thread segment two (4b) that are distributed along the axis of the lead screw (4) and rotate in opposite directions The lower part of the cutter seat (2) is provided with a threaded hole 1 that engages with the threaded segment 1 (4a), and the lower part of the seat body (3) is provided with a threaded hole 2 that engages with the threaded segment 2 (4b).
The cutting knife according to claim 1, characterized in that a limiting structure is provided between the knife seat (2) and the seat body (3) for limiting the minimum distance formed after the two slide toward each other.
The cutting knife according to claim 1 or 2, characterized in that a strip-shaped chute (1a) is formed on the bracket (1), and the length of the chute (1a) extends axially along the lead screw (4), and The notch of the chute (1a) is set upward, and the lower parts of the tool seat (2) and the seat body (3) both have a slider (7) that matches the chute (1a) and is roughly square, and the slider (7) ) is slidably set in the chute (1a).
The cutting knife according to claim 3, characterized in that the lead screw (4) is arranged in the chute (1a), and the outer end of the lead screw (4) protrudes out of the chute (1a), and the threaded holes are one and the same. The second threaded holes are arranged on the corresponding sliding blocks (7).
The cutting knife according to claim 2, wherein the limiting structure is located in the chute (1a).
The cutting knife according to claim 2 or 5, wherein the limiting structure comprises a block body one (2a) formed on the knife seat (2) and a block body two (3a) formed on the seat body (3) , the first block (2a) and the second block (3a) are arranged opposite and distributed along the axial direction of the lead screw (4), and the first block (2a) and the second block (3a) can abut together.
The cutting knife according to claim 2 or 5, characterized in that the limit structure comprises a limit block formed on the inner wall of the chute (1a), the length of the limit block extends axially along the lead screw (4), and the limit The two ends of the position block can be respectively abutted against the seat body (3) and the tool seat (2).
The cutting knife according to claim 3, characterized in that the bracket (1) comprises a front half-shell (1b) and a rear half-shell (1c) that are fixed together and are all strip-shaped, and the front half-shell (1b) and the rear half-shell The distribution direction of (1c) is perpendicular to the axial direction of the screw (4), and the above-mentioned chute (1a) is formed between the front half shell (1b) and the rear half shell (1c). A convex strip (1d) is formed on the inner wall. The length of the convex strip (1d) extends axially along the lead screw (4). There are two convex strips (1d) and are symmetrically arranged along the center of the chute (1a). Two grooves are formed between the corresponding slider (7) for the two protruding strips (1d) to slide through, and two grooves are formed between the seat body (3) and the corresponding slider (7) for the two protruding strips (1d). ) slide through the groove two.
The cutting knife according to claim 8, characterized in that, the front half shell (1b) and the rear half shell (1c) are fixedly connected by screws (1e), and the axis of the screw (1e) is perpendicular to the axis of the lead screw (4).