Pipe internally-cutting tool

Abstract

The utility model discloses a pipe cutting tool, belongs to the technical field of cutter tools, and particularly relates to an internally-cutting pipe tool which comprises a main shaft, an ejector rod, a workpiece, a shell, a fixing base, a cutter assembly and an adjusting assembly. The fixing seat is connected to the tail of the shell in a sleeved mode, one end of the main shaft penetrates through the fixing seat to be rotationally installed in the shell, the workpiece is connected to the outer side of the main shaft in a sleeved mode, the ejector rod is fixed to the interior of the main shaft and extends to the outside, and the adjusting assembly is connected to the end of the shell in a sleeved mode and matched with one end of the ejector rod in a sleeved mode. In the working state, the ejector rod rotates and axially moves, the main shaft rotates, semi-automatic cutting can be achieved, automatic returning is achieved during returning, a workpiece is prevented from being damaged, and therefore the working efficiency and the yield are greatly improved.

Description

Technical Field

[0001] This utility model discloses a tube cutting tool, belonging to the technical field of cutting tools, specifically relating to an internal tube cutting tool. Background Technology

[0002] Traditional internal tube cutting tools often use an electric drill with a cutting blade for cutting, which results in uneven holes that cannot be made in a consistent size. In addition, since the operator needs to retract the blade during cutting, it is highly dependent on the operator's skill. If the operator does not retract the blade properly, the blade may come into contact with the workpiece, causing damage to the workpiece and, in severe cases, rendering the workpiece unusable. Utility Model Content

[0003] Purpose of the utility model: To provide an internal cutting tool to solve the problems mentioned above.

[0004] Technical solution: An internal tube cutting tool, the internal tube cutting tool comprising: a spindle, a push rod, a housing, a fixed base, a cutting blade assembly, and an adjustment assembly;

[0005] The fixed seat is sleeved on the tail of the housing, one end of the main shaft passes through the fixed seat and is rotatably installed inside the housing, the push rod is fixed inside the main shaft and extends to the outside, and the adjusting component is sleeved on the end of the housing and engages with one end of the push rod.

[0006] In a further embodiment, the adjustment assembly includes: a handle, an adjustment sleeve, a thrust ball bearing, and a shim;

[0007] The adjusting sleeve is clearance-fitted to the outer side of the housing. The adjusting sleeve is rotatably sleeved on the top rod via the thrust ball bearing. The handle is screwed onto the adjusting sleeve. The top rod is provided with a fixing boss. The fixing boss and the thrust ball bearing form an installation groove. The gasket is installed in the installation groove.

[0008] In a further embodiment, the spindle is rotatably mounted in the housing via a ball bearing, and a limiting ring is fixedly sleeved on the spindle. The limiting ring is located on one side of the ball bearing to fix the position of the ball bearing on the spindle.

[0009] In a further embodiment, the push rod is provided with a limiting pin, which is located in the axial hole. In the working state, the push rod rotates and moves axially, and the limiting pin limits the axial movement distance of the push rod.

[0010] In a further embodiment, a first spring is provided on the spindle.

[0011] In a further embodiment, the tail of the cutter holder has a cutter hole, the cutter is installed in the cutter hole through the cutter holder, the pin is fixedly connected to the main shaft and movably connected to the cutter holder, the cutter holder is sleeved with a second spring, and the end of the cutter holder contacts the tail of the push rod.

[0012] In a further embodiment, the tail end of the spindle is fixed to the workpiece by a retaining sleeve.

[0013] In a further embodiment, the end of the push rod is provided with a mounting groove, and a shaft retaining ring is provided in the mounting groove.

[0014] Beneficial effects: This invention allows for semi-automatic cutting by rotating the adjusting sleeve towards the workpiece while holding the handle. The push rod pushes the cutting assembly closer to the inner wall of the workpiece's hole. Simultaneously, an electric drill connected to the rear square hole rotates, causing the push rod and spindle to rotate, thus cutting the workpiece. After cutting, the electric drill stops, the handle reverses direction, the adjusting sleeve reverses, the push rod retracts under spring pressure, and the cutting blade retracts towards the center of the workpiece hole under spring pressure. This invention enables semi-automatic cutting and automatic retraction during the retraction process, preventing damage to the workpiece and significantly improving work efficiency and yield. Attached Figure Description

[0015] Figure 1 This is an isometric drawing of this utility model.

[0016] Figure 2 This is a schematic diagram of the present invention.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Figure 4 This is a schematic diagram of the cutting blade assembly of this utility model.

[0019] Reference numerals in the attached drawings: 1. Top rod; 2. Main shaft; 3. Workpiece; 4. Housing; 5. Fixing seat; 6. Cutting assembly; 61. Tool holder; 62. Pin; 63. Cutting blade; 7. Adjusting assembly; 71. Handle; 72. Adjusting sleeve; 73. Thrust ball bearing; 74. Washer; 8. Ball bearing; 9. Limiting ring; 10. Limiting pin; 11. First spring; 12. Second spring; 13. Fixing sleeve; 14. Shaft retaining ring. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] An internal tube cutting tool includes: a push rod 1, a spindle 2, a workpiece 3, a housing 4, a fixed base 5, a cutting blade assembly 6, and an adjustment assembly 7.

[0024] In one embodiment, such as Figures 1 to 3 As shown, the fixed seat 5 is sleeved on the tail of the housing 4, one end of the main shaft 2 passes through the fixed seat 5 and is rotatably installed inside the housing 4, the workpiece 3 is sleeved on the outside of the main shaft 2, the push rod 1 is fixed inside the main shaft 2 and extends to the outside, and the adjusting component 7 is sleeved on the end of the housing 4 and is sleeved and engaged with one end of the push rod 1.

[0025] In one embodiment, such as Figures 1 to 3 As shown, the adjustment assembly 7 includes: a handle 71, an adjustment sleeve 72, a thrust ball bearing 73, and a shim 74;

[0026] The adjusting sleeve 72 is clearance-fitted to the outer side of the housing 4. The adjusting sleeve 72 is rotatably sleeved on the push rod 1 through the thrust ball bearing 73. The handle 71 is screwed onto the adjusting sleeve 72. The push rod 1 is provided with a fixed boss. The fixed boss and the thrust ball bearing 73 form an installation groove. The gasket 74 is installed in the installation groove.

[0027] In one embodiment, such as Figures 1 to 3As shown, the main shaft 2 is rotatably mounted in the housing 4 via a ball bearing 8. A limiting ring 9 is sleeved on the main shaft 2. The limiting ring 9 is located on one side of the ball bearing 8 to fix the position of the ball bearing 8 on the main shaft 2.

[0028] In one embodiment, such as Figures 1 to 3 As shown, the main shaft 2 is provided with an axial hole, and the push rod 1 is provided with a limiting pin 10. The limiting pin 10 is located in the axial hole. In the working state, the push rod 1 rotates and moves axially, and the limiting pin 10 limits the axial movement distance of the push rod.

[0029] In one embodiment, such as Figures 1 to 3 As shown, a first spring 11 is provided on the main shaft 2.

[0030] In one embodiment, such as Figures 1 to 4 As shown, the tail of the blade holder 61 has a blade hole, and the cutter 63 is installed in the blade hole through the blade holder 61. The pin 62 is fixedly connected to the main shaft 2 and movably connected to the blade holder 61. The blade holder 61 is fitted with a second spring 12, and the end of the blade holder 61 contacts the tail of the push rod 1.

[0031] In one embodiment, such as Figures 1 to 3 As shown, the tail end of the spindle 2 is fixed to the workpiece 3 by a fixing sleeve 13.

[0032] In one embodiment, such as Figures 1 to 3 As shown, the end of the top rod 1 is provided with a mounting groove, and a shaft retaining ring 14 is provided in the mounting groove.

[0033] Working principle: First, hold the handle 71 and rotate the adjusting sleeve 72 clockwise to move it towards the workpiece. Driven by the adjusting sleeve 72, the thrust ball bearing 73, washer 74, and push rod 1 move towards the workpiece. The push rod 1 pushes the cutter assembly 6 closer to the inner wall of the workpiece hole. Simultaneously, an electric drill is connected at the rear square hole. The electric drill rotates the push rod 1 and spindle 2, thus cutting the workpiece. After the workpiece is cut, the electric drill stops, the handle 71 moves in the opposite direction, the adjusting sleeve 72 reverses, the push rod 1 retracts, and the cutter retracts towards the center of the workpiece hole under the action of the first spring 11.

[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An internal tube cutting tool, characterized in that, The internal tube cutting tool includes: a spindle, a push rod, a housing, a mounting base, a cutting blade assembly, and an adjustment assembly; The fixed seat is sleeved on the tail of the housing. One end of the main shaft passes through the fixed seat and is rotatably installed inside the housing. The push rod is fixed inside the main shaft and extends to the outside. The adjusting component is sleeved on the end of the housing and engages with one end of the push rod. In the working state, the push rod rotates and moves axially, and the main shaft rotates.

2. The internal cutting tool according to claim 1, characterized in that, The adjustment assembly includes: a handle, an adjustment sleeve, a thrust ball bearing, and a shim; The adjusting sleeve is clearance-fitted to the outer side of the housing. The adjusting sleeve is rotatably sleeved on the top rod via the thrust ball bearing. The handle is screwed onto the adjusting sleeve. The top rod is provided with a fixing boss. The fixing boss and the thrust ball bearing form an installation groove. The gasket is installed in the installation groove.

3. The internal cutting tool according to claim 1, characterized in that, The main shaft is rotatably mounted in the housing via ball bearings. A limiting ring is fixedly sleeved on the main shaft, and the limiting ring is located on one side of the ball bearing to fix the position of the ball bearing on the main shaft.

4. The internal cutting tool according to claim 1, characterized in that, The main shaft is provided with an axial hole, and the push rod is provided with a limiting pin. The limiting pin is located in the axial hole. In the working state, the push rod rotates and moves axially, and the limiting pin limits the axial movement distance of the push rod.

5. The internal cutting tool according to claim 1, characterized in that, The main shaft is equipped with a first spring.

6. The internal cutting tool according to claim 1, characterized in that, The cutting assembly includes: a blade holder, a pin, and a cutting blade; The tail of the cutter holder has a cutter hole, and the cutter is installed in the cutter hole through the cutter holder. The pin is fixedly connected to the main shaft and movably connected to the cutter holder. The cutter holder is fitted with a second spring, and the end of the cutter holder contacts the tail of the push rod.

7. The internal cutting tool according to claim 1, characterized in that, The tail end of the spindle is fixed to the workpiece by a fixing sleeve.

8. The internal cutting tool according to claim 1, characterized in that, The end of the top rod is provided with a mounting groove, and a shaft retaining ring is provided in the mounting groove.

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