TWM558132U - Tube expander structure - Google Patents

Abstract

The structure of a pipe expander includes a base, an actuating member and a limiting member. The base protrudes from a neck section and is provided with a threaded hole penetrating through the base, and a tube fixing seat is arranged below the base; the actuating member is movably screwed to the screw hole by a screw sleeve, and a top end of the actuating member is provided The driving portion has a expanding head at the bottom end; the limiting member is connected to the neck portion by a first end, and the driving portion of the actuating member is restricted by a second end. The screw hole defining the base extends along a virtual first central axis, and the actuating member extends along a virtual second central axis, and the limiting member causes the second central axis of the actuating member and the first central axis of the screw hole to always Coaxial coincidence.

Description

Expander structure

This creation relates to hand tools for processing pipe fittings, especially a pipe expander.

A conventional expander, for example, Japanese Utility Model Registration No. 3196796, which includes a base through which a screw hole is bored for a stud to be movably disposed, and a stud head is provided at the bottom of the stud. The expansion head can be moved up and down with the rotation of the stud in the screw hole, thereby performing a pipe expansion operation on the pipe to be processed placed under the base. Since the movement of the expansion head is caused by the rotation of the stud, the operator usually uses a power tool instead of a human hand to operate, but because the driving speed of the power tool is too fast, when the stud is withdrawn, the operation is often over-the-top. The entire stud is removed from the screw hole, and the stud must be reinstalled to be used again, which is inconvenient.

Another conventional expander as shown in FIG. 3 has a screw hole 5 having a hole diameter slightly larger than the outer diameter of the stud 6, so that the stud 6 and the screw hole 5 are not tightly engaged; The stud 6 is provided with a spring 61. When the stud 6 is retracted to the end, the thread of the screw hole 5 is disengaged, thereby forming an idling, and then the stud 6 is quickly reconnected to the snail by the spring 61. Hole 5. According to this configuration, it is possible to cause damage without using the power tool to drive the stud 6 too quickly.

However, since the screw hole 5 is slightly larger than the stud 6, when the stud 6 trips the screw hole 5, the stud 6 is easily formed at an angle with respect to the tilting state of the screw hole 5 (ie, the central axes of the two). θ) Reconnect the screw hole 5, however, the threads of the two are relatively skewed and cannot be smoothly engaged. Under the strong driving of the power tool, the thread structure will be collapsed, so that the entire expander fails.

In view of this, how to improve the above problems is the primary issue that the creative office wants to solve.

The main purpose of the present invention is to provide a structure of a pipe expander that uses a limiting member fixedly disposed on the base to limit the actuating member for expanding the pipe, thereby ensuring its position to avoid damage.

For the purpose of the foregoing, the present invention provides a structure of a pipe expander, comprising: a base extending from a neck section, the neck section being provided with a screw hole extending through the base, defining the screw hole along a a virtual first central axis extending; the neck portion is provided with a connecting portion; a tubular member fixing seat is disposed below the base; and an actuating member is defined to extend along a virtual second central axis and extend through the screw hole The actuating member is movably screwed to the screw hole by a screw sleeve; a driving portion is disposed at a top end of the actuating member, and a bottom portion is provided with a pipe expanding head; and a limiting member is connected by a first end At the connecting portion of the neck portion, the driving portion of the actuating member is restricted by a second end such that the second central axis of the actuating member and the first central axis of the screw hole are always coaxially coincident.

In one embodiment, the limiting member is a sleeve, and the first end is provided with an internal threaded section; the connecting portion is an externally threaded section, and the sleeve is fixedly engaged with the externally threaded section by the internal threaded section.

Further, the second end of the limiting member forms an annular wall surrounding the periphery of the driving portion.

In an embodiment, the annular wall abuts against a circumference of the driving portion.

In an embodiment, there is a gap between the annular wall and the periphery of the driving portion, the gap being insufficient for the screw sleeve to obliquely engage the screw hole.

The above objects and advantages of the present invention are not to be understood in detail from the detailed description and the accompanying drawings.

Please refer to Figures 1 and 2 for the structure of the expander provided for the creation, which comprises a base 1, an actuating member 2 and a limiting member 3. The top end of the base 1 protrudes from a neck portion 11 , and the bottom end protrudes from the two sides as a foot portion 12 of the rail, and the two leg portions 12 have an installation space 13 between the two legs. 4 slidably disposed therein, wherein the tube fixing base 4 is provided with a plurality of tube fixing holes 41 respectively having different apertures, so that the tubes of different diameters can be inserted into the position to be expanded.

The neck portion 11 is provided with a screw hole 14 extending up and down through the base 1. The screw hole 14 is defined to extend along a virtual first central axis C1, and an inner thread portion 141 is defined on the inner side wall. The outer side wall of the neck portion 11 is provided with a connecting portion for connecting the limiting member 3; in the embodiment, the connecting portion is an externally threaded portion 15.

On the other hand, the actuating member 2 is an elongated structure having a driving portion 21 at its top end and a expanding head portion 22 at the bottom end. The actuating member 2 extends along a virtual second central axis C2 and extends. In the screw hole 14. The actuating member 2 is provided with a threaded sleeve 23 having an externally threaded portion 231 and is screwed into the threaded portion 141 of the threaded hole 14 so that the actuating member 2 can be rotated by the threaded sleeve 23 The relative rotation of the screw hole 14 causes an up-and-down displacement; wherein the hole diameter of the screw hole 14 is slightly larger than the outer diameter of the screw sleeve 23, so the screw sleeve 23 does not mesh very tightly with the screw hole 14. The actuating member 2 is sleeved with a spring 24, one end of which abuts against one of the fixed ends 25 of the actuating member 2, and the other end abuts against the edge of the screw hole 14. The actuating member 2 is moved up to disengage the nut sleeve 23 from the screw hole 14, thereby forming an idling, and then the actuating member 2 is pushed downward by the spring 24, so that the screw sleeve 23 is reconnected to the screw hole 14.

The limiting member 3 has a first end 31 and a second end 32 connected to the connecting portion of the neck portion 11 by the first end 31, and the second end 32 is directed to the driving portion of the actuating member 2 The extension 21 extends and the position of the driving portion 21 can be restricted. In this embodiment, the limiting member 3 is a tubular sleeve, and the inner side wall of the first end 31 is provided with an internal thread segment 311, and the cymbal is fixedly connected with the external thread segment 15 of the neck portion 11; The end 32 defines an annular wall 33 which surrounds the periphery of the driving portion 21, wherein the annular wall 33 abuts against the circumference of the driving portion 21 or has a gap with the periphery of the driving portion 21 (in the figure) Not shown), the position of the driving portion 21 is restrained so that the second central axis C2 of the actuator 2 coincides with the first central axis C1 of the screw hole 14 coaxially. In the embodiment having the gap between the annular wall 33 and the driving portion 21, the width of the gap is insufficient to cause the threaded sleeve 23 to be excessively skewed with respect to the screw hole 14, and the smoothness can still be smoothly The screw holes 14 are joined.

With the above structure, after the pipe expansion of the pipe to be processed is completed, the driving portion 21 is driven to rotate the actuating member 2 and is moved upward by the relative rotation of the screw sleeve 23 and the screw hole 14, when the screw sleeve 23 is moved. When the screw hole 14 is temporarily disengaged, as shown in FIG. 2, the entire actuator 2 is still restrained by the limiting member 3 by the driving portion 21, and the second central axis C2 and the screw hole 14 are maintained. A position where the central axis C1 is coaxially coincident; in other words, the actuating member 2 is still facing the screw hole 14, and does not form a relatively skewed state. Accordingly, when the spring 24 pushes the actuator 2 back and reattaches the screw hole 14, the actuating member 2 can be smoothly engaged with the screw hole 14 to prevent the thread from collapsing and damage.

However, the above description of the embodiments is merely illustrative of the present invention and is not intended to limit the present invention. Therefore, the replacement of equivalent elements should still be within the scope of the present invention.

In summary, it can be made clear to the skilled person that the creation can achieve the aforementioned objectives, and it has already met the requirements of the Patent Law and submitted an application according to law.

1‧‧‧Base
11‧‧‧ neck section
12‧‧‧ foot segments
13‧‧‧Installation space
14‧‧‧ screw holes
141‧‧‧Threaded Department
15‧‧‧External thread section
2‧‧‧Operator
21‧‧‧ Drive Department
22‧‧‧Expanded head
23‧‧‧Spiral sleeve
231‧‧‧External thread
24‧‧ ‧ spring
25‧‧‧ fixed end
3‧‧‧Limited parts
31‧‧‧ first end
311‧‧‧Threaded section
32‧‧‧second end
33‧‧‧Circular wall
C1‧‧‧ first central axis
C2‧‧‧second central axis
4‧‧‧ pipe fittings
41‧‧‧ pipe fitting fixing hole
5‧‧‧ screw holes
6‧‧‧ Stud
61‧‧‧spring θ‧‧‧ angle

Fig. 1 is a perspective exploded view of the creation; Fig. 2 is a schematic cross-sectional view of the creation; and Fig. 3 is a schematic cross-sectional view showing the state of use of the conventional structure.

Claims (5)

A structure of a pipe expander comprising: a base extending from a neck section, the neck section being provided with a screw hole extending through the base, the screw hole being defined to extend along a virtual first central axis; a neck portion is provided with a connecting portion; a pipe fitting is disposed below the base; an actuating member is defined to extend along a virtual second central axis and extends through the screw hole; the actuating member is provided by a screw sleeve The movable part is screwed to the screw hole; the top end of the actuating member is provided with a driving portion, and the bottom end is provided with a expanding head; a limiting member is connected to the connecting portion of the neck portion by a first end, and The driving portion of the actuating member is restricted by a second end such that the second central axis of the actuating member and the first central axis of the screw hole are always coaxially coincident. The structure of the expander of claim 1, wherein the limiting member is a sleeve, the first end is provided with an internal thread segment; the connecting portion is an externally threaded portion, and the sleeve is internally threaded The segment is fixedly engaged with the externally threaded section. The structure of the expander of claim 1, wherein the second end of the limiting member forms an annular wall surrounding the periphery of the driving portion. The structure of the expander of claim 3, wherein the annular wall abuts against a circumference of the driving portion. The structure of the expander of claim 3, wherein a gap is formed between the annular wall and the periphery of the driving portion, the gap being insufficient for the screw sleeve to obliquely engage the screw hole.