TWM596671U - Tube expander - Google Patents

Abstract

A tube expander includes: a body including a base and a handle, the base is penetrated with a sliding hole and has a first pivoting portion; a pressing handle has a pivoting end and a pressing end, the The pivoting end has a second pivoting portion pivotally connected to the first pivoting portion, and the pivoting end further has a third pivoting portion; a pipe expanding member is slidably disposed in the sliding hole and includes a sliding Part and a tapered part, the tapered part is located at the end of the sliding part facing away from the pressure bar and extends outside the sliding hole, the outer diameter of the tapered part is tapered outward, and the tapered part has the tapered part A fourth pivotal portion; a connecting rod, which is provided between the pressure handle and the pipe expansion member and opposite ends are respectively pivotally connected to the third pivotal portion and the fourth pivotal portion; when the pressing end of the pressure handle faces The shank of the body is pivoted close, and the pivoting end drives the pipe expanding member to slide away from the pressure bar by the connecting rod, so that the tapered portion protrudes more out of the sliding hole.

Description

Expander

This creation is about a tube expander.

Generally speaking, when the pipe fittings are connected to each other, one end of one pipe fitting must be expanded to expand the inner diameter of the end. In this way, the other pipe fitting can be inserted at the pipe expansion section. To perform the work of connecting pipe fittings, and to expand the ends of the pipe fittings, a pipe expander is usually used for the work.

There are many types of structural principles of the expander, one of which is to sleeve the end of the pipe fitting on a pipe expansion joint. The pipe expansion joint is composed of a plurality of components that can move radially outward, and the inner walls of these components are inclined A cone-shaped space is formed, and then the pipe expansion joint is sleeved on a pipe expander, as disclosed in patents US 9555577 or US 6672128, the pipe expander has a cone-shaped pipe expansion member that can slide, when the pipe expansion member is Sliding in the cone-shaped space can push the components of the pipe expansion joint outward, so that the pipe is expanded.

Among them, there are various mechanisms for driving the sliding movement of the cone-shaped pipe expansion member. For example, the patent US 9555577 uses the piston to move forward and backward to drive the pipe expansion member to move, but this structure usually needs to be equipped with an additional power source, and it is not easy to manually push the piston by hand; As for the US Pat. No. 6,672,128, the expansion of the pipe expansion member is driven by gears and gear rows. Although it is labor-saving compared to the US Pat.

The main purpose of this creation is to provide a pipe expander, which has a simple structure, is easy to manufacture, and uses less labor.

In order to achieve the above purpose, the present invention provides a pipe expander, which includes a body, a pressure handle, a pipe expanding piece and a connecting rod.

The body includes a base portion and a shank portion extending outward from the base portion, the base portion is provided with a sliding hole, an extension line of the central axis of the sliding hole defines a central axis, and the base portion has a first pivot portion; The opposite ends of the pressure lever are respectively a pivoting end and a pressing end, the pivoting end has a second pivoting portion, the second pivoting portion and the first pivoting portion are pivotally connected to each other, the pivoting end Another has a third pivotal portion; the pipe expanding member is slidably disposed in the sliding hole, including a sliding portion and a tapered portion, the tapered portion is located at the end of the sliding portion facing away from the pressure bar and extends Outside the sliding hole, the outer diameter of the tapered portion tapers away from the sliding portion, and the tapered portion has a fourth pivotal portion; the connecting rod is provided at the pivot of the handle Between the connecting end and the sliding part of the pipe expanding part and opposite ends are respectively pivotally connected to the third pivotal part and the fourth pivotal part; wherein, when the pressing end of the pressure bar pivots towards the handle part of the body As the pendulum approaches, the pivoting end drives the pipe expansion member to slide away from the pressure bar through the connecting rod, so that the tapered portion protrudes more out of the sliding hole.

The following only uses examples to illustrate the possible implementation of this creation, but it is not intended to limit the scope of this creation to be protected, which will be described first.

Please refer to FIG. 1 to FIG. 7, the present invention provides a pipe expander, which includes a body 10, a pressure bar 20, a pipe expanding member 30 and a connecting rod 40.

The body 10 includes a base portion 11 and a shank portion 12 extending outward from the base portion 11. The base portion 11 is provided with a sliding hole 131. An extension of the central axis of the sliding hole 131 defines a central axis. The base portion 11 It has a first pivoting portion; the opposite ends of the pressing lever 20 are respectively a pivoting end 21 and a pressing end 22 (preferably, the pressing lever 20 is generally L-shaped), the pivoting end 21 has a first Two pivotal portions, the second pivotal portion and the first pivotal portion are pivotally connected to each other, the pivotal end 21 further has a third pivotal portion; the pipe expanding member 30 is slidably disposed in the sliding hole 131, It includes a sliding portion 31 and a tapered portion 32. The tapered portion 32 is located at an end of the sliding portion 31 facing away from the pressing lever 20 and extends outside the sliding hole 131. The outer diameter of the tapered portion 32 faces The direction away from the sliding portion 31 is tapered and tapered. The sliding portion 31 has a fourth pivotal portion; the connecting rod 40 is disposed on the sliding end 21 of the handle 20 and the pipe expansion member 30 to slide Between the shifting portion 31 and opposite ends are respectively pivotally connected to the third pivoting portion and the fourth pivoting portion; wherein, when the pressing end 22 of the handle 20 pivots toward the handle 12 of the body 10, The pivoting end 21 drives the pipe expanding member 30 to slide away from the pressure lever 20 by the connecting rod 40, so that the tapered portion 32 protrudes out of the sliding hole 131.

In this embodiment, the extension line of the pivot axis 23 of the first pivotal portion and the second pivotal portion does not pass through the central axis, that is to say, the pivotal connection between the body 10 and the handle 20 is not at The moving direction of the pipe expanding member 30 extends on the line; preferably, the side of the connecting rod 40 near the handle 12 is recessed with a first recess 41, and the side of the connecting rod 40 facing away from the handle 12 is recessed with a first The second recess 42 is closer to the pivot end 21 of the handle 20 than the first recess 41, so that the connecting rod 40 is slightly S-shaped; more preferably, the first recess 41 is located approximately at the The center of the connecting rod 40.

Specifically, the pivot end 21 of the handle 20 has two side plates 211, and an insertion groove 212 is formed between the two side plates 211. The insertion groove 212 is used for inserting one end of the connecting rod 40. The connecting rods 40 are pivotally connected to each other. The base portion 11 of the body 10 has a slot 111 on the side toward the pivot end 21 of the handle 20. The slot 111 communicates with the sliding hole 131. The two side plates 211 are inserted into the slot 111 and are pivotally arranged with the two side walls of the slot 111. The sliding portion 31 of the pipe expansion member 30 defines a receiving slot 311 on the side of the connecting rod 40. The connecting rod The other end of 40 is inserted into the accommodating groove 311 and is pivotally arranged with the two side walls of the accommodating groove 311.

Regarding the sliding hole 131, specifically, in this embodiment, the body 10 further includes a threaded sleeve 13, the threaded sleeve 13 penetrates the sliding hole 131, one end of the threaded sleeve 13 has an external thread, the The base portion 11 of the body 10 is provided with a through hole 112 having an internal thread at an end farther away from the handle 20. The threaded sleeve 13 is screwed on the internal thread of the through hole 112 with its external thread, and the threaded sleeve 13 is further away One end of the handle 20 has an external thread for screwing a pipe expansion joint 60.

On the other hand, in order to adjust the maximum sliding distance of the pipe expansion member 30, it is necessary to adjust the maximum pressing distance of the pressing lever 20. For this reason, the side of the body 10 facing the pressing lever 20 is recessed with a screw hole 1131, an adjusting screw The member 50 is screwed in the screw hole 1131 and is located at an end outside the screw hole 1131 for the pressure lever 20 to abut against, and the adjusting screw member 50 is adjusted by screwing the adjusting screw member 50 to protrude out of the screw hole 1131 The length of the body; preferably, a side of the body 10 facing the pressure lever 20 is convexly provided with a protrusion 113, the screw hole 1131 is recessed in the protrusion 113, in addition, the central axis is located at the first pivotal portion Between the extension line of the pivot and the screw hole 1131; when the adjusting screw 50 is relatively retracted, or even completely retracted, so that the pressing lever 20 can directly press against the protrusion 113, as shown in FIG. 6, the pressing lever The longer the maximum pressing distance of 20, the longer the maximum sliding distance of the pipe expanding member 30 is; on the contrary, when the adjusting screw 50 is more protruding, as shown in FIG. 7, the maximum pressing distance of the pressing lever 20 is shorter, The maximum sliding distance of the pipe expansion member 30 is shorter to match pipe expansion joints of different sizes.

In actual use, it is fixed on the outside of the screw sleeve 13 by using a conventionally-expanded expansion joint 60, wherein the expansion joint 60 includes a component that can expand radially outward, and the inner wall of the component surrounds a tapered space. When the tapered portion 32 of the tube expansion member 30 is pushed into the tapered space, these components will be gradually pushed outward, so as to achieve the effect of expanding the inner diameter of the tube sleeved outside the component.

In summary, the expander provided by this creation has a very simple structure, is easy to manufacture, and the linkage driving mechanism is relatively labor-saving and smooth, and the components are not easily damaged. In addition, the maximum pressing distance of the pressure bar can be adjusted to adjust the expansion The maximum moving distance of the pipe fittings to match the expansion joints of different sizes and specifications is very advanced.

10: Ontology 11: Base 111: Slotted 112: Piercing 113: bump 1131: screw hole 12: handle 13: screw sleeve 131: Slip hole 20: Clamp 21: Pivot end 211: Side panel 212: Slotted 22: Pressing end 23: pivot 30: Pipe expansion 31: Slip 311: container 32: cone 40: connecting rod 41: First recess 42: Second recess 50: adjusting screw 60: Expansion joint

Figure 1 is a perspective view of this creation. Figure 2 is a three-dimensional exploded view of this creation. Figure 3 is a cross-sectional view of this creation. Figure 4 is a cross-sectional view from another angle of this creation. Figures 5 and 6 are schematic diagrams of the use of this creation. Figure 7 is the adjustment diagram of this creation.

10: Ontology

11: Base

12: handle

13: screw sleeve

20: Clamp

21: Pivot end

22: Pressing end

23: pivot

30: Pipe expansion

60: Expansion joint

Claims (9)

A pipe expander, including: A body includes a base portion and a shank portion extending outward from the base portion, the base portion is penetrated with a sliding hole, an extension line of the central axis of the sliding hole defines a central axis, and the base portion has a first pivoting portion ; A pressing handle, opposite ends are respectively a pivoting end and a pressing end, the pivoting end has a second pivoting portion, the second pivoting portion and the first pivoting portion are pivotally connected to each other, the pivoting The end also has a third pivot portion; A pipe expanding piece is slidably disposed in the sliding hole, and includes a sliding portion and a tapered portion. The tapered portion is located at an end of the sliding portion facing away from the pressure bar and extends outside the sliding hole. The outer diameter of the tapered portion is tapered toward the direction away from the sliding portion, and the sliding portion has a fourth pivoting portion; A connecting rod, which is provided between the pivoting end of the pressing handle and the sliding part of the pipe expansion member and opposite ends are respectively pivotally connected to the third pivoting part and the fourth pivoting part; Wherein, when the pressing end of the pressing lever pivots towards the handle of the body, the pivoting end drives the expanding member to slide away from the pressing lever by the connecting rod, making the tapered portion more protruding Outside the slip hole. The pipe expander according to claim 1, wherein the pivot end of the handle has two side plates, and an insertion groove is formed between the two side plates, and the insertion groove is provided for inserting one end of the connecting rod. The links are pivotally connected to each other. The expander as described in claim 2, wherein the base of the body has a slot toward the pivot end of the handle, the slot is in communication with the sliding hole, and the two side plates of the handle are inserted The slot and the two side walls of the slot are pivotally arranged with each other. The pipe expander according to claim 1, wherein the sliding portion of the pipe expander has a receiving slot on a side facing the connecting rod, and one end of the connecting rod is inserted into the receiving slot and is connected to the two side walls of the receiving slot Set up with each other. The pipe expander according to claim 1, wherein a side of the body facing the pressure bar is concavely provided with a screw hole, and an adjustment screw is screwed in the screw hole and is located at an end outside the screw hole for the pressure bar to resist At the top, the length of the adjusting screw protruding out of the screw hole can be adjusted by the adjusting screw screw turning. The pipe expander according to claim 5, wherein a side of the body facing the pressure bar is convexly provided with a convex block, and the screw hole is concavely arranged on the convex block. The expander according to any one of claims 1 to 6, wherein the extension lines of the first pivotal portion and the second pivotal portion do not pass through the central axis. The pipe expander according to any one of claims 1 to 6, wherein a side of the connecting rod close to the handle is recessed with a first recess, and a side of the connecting rod facing away from the handle is recessed with a first recess Two recesses, the second recess is closer to the pivot end of the handle than the first recess. The expander according to claim 3, wherein the pivots of the first pivotal portion and the second pivotal portion do not pass through the central axis; a side of the connecting rod close to the handle is recessed with a first A concave portion, a side of the connecting rod facing away from the handle portion is concavely provided with a second concave portion, the second concave portion is closer to the pivot end of the pressing handle than the first concave portion; the sliding portion of the pipe expanding member faces the connecting rod A receiving slot is opened on one side of the connecting rod, and the other end of the connecting rod is inserted into the receiving slot to pivot with the two side walls of the receiving slot; the side of the body facing the handle is concavely provided with a screw hole and an adjusting screw The screw is installed in the screw hole and is located at one end outside the screw hole for the pressure bar to be pressed against, and the length of the adjusting screw protruding out of the screw hole can be adjusted by the screw adjusting screw; the body faces the One side of the handle is convexly provided with a convex block, the screw hole is concavely arranged on the convex block; the body further includes a screw sleeve, the screw sleeve is penetrated with the sliding hole, and one end of the screw sleeve has an external thread, and the body The base part is provided with a perforation, the end of the perforation farther away from the pressure bar has an internal thread, the screw sleeve is screwed on the internal thread of the perforation with its external thread, and the end of the nut farther away from the pressure bar has an external thread The lever is L-shaped; the central axis is located between the extension line of the first pivotal portion and the screw hole.

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