CN209969403U - Tube expander structure for improving quality of tube expander bell mouth - Google Patents

Tube expander structure for improving quality of tube expander bell mouth Download PDF

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Publication number
CN209969403U
CN209969403U CN201920402356.6U CN201920402356U CN209969403U CN 209969403 U CN209969403 U CN 209969403U CN 201920402356 U CN201920402356 U CN 201920402356U CN 209969403 U CN209969403 U CN 209969403U
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expander
mandrel
pipe
cavity
quality
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CN201920402356.6U
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蒋友荣
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蒋友荣
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Priority claimed from PCT/CN2020/080586 external-priority patent/WO2020192610A1/en
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Abstract

The utility model discloses a pipe expander, which provides a pipe expander structure with simple structure, time and labor saving and capable of effectively ensuring the bell mouth processing quality and improving the bell mouth quality of pipe expander, and solves the technical problems that the pipe expander processing is time and labor consuming and the bell mouth quality of pipe expander processing is difficult to ensure in the prior art, the pipe expander comprises a pipe expander body and a clamping head body which is rotationally connected on the pipe expander body, a mandrel containing cavity is arranged on the pipe expander body opposite to the clamping head body, a mandrel is slidably connected in the mandrel containing cavity, the mandrel is connected with the worm gear mechanism through an axially slidable flat key, the outer end of the mandrel is provided with a pipe expander cone which can extend out of the mandrel containing cavity and form an included angle with the axis of the mandrel, the inner end forms an elastomer containing cavity, the flat key extends into the elastomer containing cavity, and an elastic body is clamped between the bottom surface of the elastic body accommodating cavity and the flat key, and the elastic body is gradually compressed along the axial direction during pipe expansion.

Description

Tube expander structure for improving quality of tube expander bell mouth
Technical Field
The utility model relates to an expander especially relates to a simple structure, adopts worm gear mechanism to carry out the expander processing, labour saving and time saving to can effectively guarantee the expander structure that is used for improving the expander horn mouth quality of horn mouth processingquality.
Background
In the process of installing or maintaining the air conditioner, a pipe expander is needed to perform expanding processing on the refrigerant copper pipe. The existing pipe expander generally comprises a manual pipe expander and an electric pipe expander, the manual pipe expander has the advantages of small size and light weight, but the knob needs to be rotated by one hand during pipe expansion, which wastes time and labor. The electric pipe expander has the advantages of time-saving and labor-saving pipe expanding processing, high pipe expanding efficiency and the like, so the electric pipe expander is increasingly popularized and applied. However, the existing electric pipe expander generally has the defects of complex internal mechanical structure, large volume and weight, time and labor waste in processing and difficult guarantee of the quality of the flared opening in pipe expanding processing.
Disclosure of Invention
The utility model mainly provides a simple structure adopts worm gear mechanism to carry out the expander processing, labour saving and time saving to can effectively guarantee the expander structure that is used for improving the expander horn mouth quality of horn mouth processingquality, solve the expander processing that exists among the prior art and waste time and energy, the technical problem that expander processing horn mouth quality also hardly guaranteed etc.
The above technical problem of the present invention can be solved by the following technical solutions: the utility model provides an expander structure for improving pipe expander horn mouth quality, includes expander body and the chuck body of rotation connection on the expander body, with the expander body that the chuck body is relative is equipped with the dabber and holds the chamber, and the dabber holds intracavity sliding connection the dabber, but the dabber is connected with worm gear mechanism through axially sliding's flat key, and the outside end of dabber has the pipe expander cone that can extend to outside the dabber holds the chamber and form the contained angle with the dabber axis, and the medial extremity forms the elastomer and holds the chamber, and the flat key extends to the elastomer and holds the intracavity, and presss from both sides between the bottom surface that the elastomer held the chamber and flat key and be equipped with the elastomer, and the elastomer is along axial compression gradually when expanding. The mandrel for pushing the pipe expanding cone to expand the pipe is driven by the worm and gear mechanism, so that time and labor are saved, and the pipe expanding processing efficiency is high; and the elastic body is arranged between the flat key corresponding to the mandrel containing cavity and the bottom surface of the mandrel containing cavity, when the pipe expanding processing is carried out, the worm wheel rotates to drive the flat key to rotate forwards, the elastic body is axially compressed, and because the pipe expanding cone carries out the pipe expanding processing through a spinning type, the elastic body deforms by itself during the processing period to reduce the axial moving speed of the mandrel, the single-circumference axial feeding deformation is reduced, so that the circumferential shape of the copper pipe bell mouth tends to be uniform, and the processing quality of the bell mouth is effectively ensured.
Preferably, a guide screw is fixed on the pipe expander body opposite to the chuck body, the inner side end of the guide screw extends into the elastomer accommodating cavity, a transmission nut is screwed outside the inner side end of the guide screw, an axial open slot is formed in the outer side end of the transmission nut, and the inner side ends of the flat keys are mutually matched and inserted in the axial open slot. The guide screw has the advantages that the guide screw plays a role in positioning the mandrel, the mandrel is made of plastic on the one hand on the premise of guaranteeing the strength requirement, the strength is guaranteed through the transmission nut made of metal, the manufacturing cost can be saved, the weight of the whole machine can be reduced, and the guide screw is convenient to use and carry.
More preferably, the elastic body is an annular rubber member, and the inner end of the lead screw extends into the middle hole of the elastic body. The annular rubber elastomer is low in cost, and the annular structure provides a traveling space for the guide screw rod, so that the thickness of the transmission nut can be reduced.
Preferably, a cone positioning hole is formed in the outer end face of the mandrel, an included angle is formed between the axis of the cone positioning hole and the axis of the mandrel, and the pipe expanding cone is rotatably connected in the cone positioning hole through a cone bearing. The pipe expanding cone is obliquely fixed on the outer end face of the mandrel to realize the spinning pipe expanding processing, and the pipe expanding cone is rotatably connected with the mandrel through the cone bearing, so that the pipe expanding cone can freely rotate along the axis of the pipe expanding cone, and the rolling friction is kept between the pipe expanding cone and the pipe expanding copper pipe during the spinning pipe expanding processing, thereby not only saving time and labor during the pipe expanding processing, but also ensuring the pipe expanding processing quality indirectly.
Preferably, a mandrel bearing is embedded in the pipe expander body corresponding to the outer side end of the mandrel, a support ring is arranged between a middle hole of the mandrel bearing and the outer annular surface of the mandrel, and the inner end of the support ring extends into a worm wheel middle hole on the worm gear mechanism and is tightly matched with the worm wheel. The support ring extends to the middle hole of the worm wheel, so that the mandrel can be stably supported through a single bearing, the forming body is saved, and the structure is more compact.
Preferably, the flat key is a cylindrical pin. The key transmission adopts a cylindrical pin, so that the friction is smaller and the weight is lighter.
Preferably, the mandrel is connected with the worm gear mechanism through at least two flat keys, and the flat keys are uniformly distributed in the circumferential direction of the mandrel. The flat keys uniformly distributed in the circumferential direction ensure the stress balance of the mandrel so as to ensure the processing quality of pipe expanding.
Therefore, the utility model discloses an expander structure for improving expander horn mouth quality has following advantage:
1. the pipe expanding cone is rotationally connected to the mandrel through the cone bearing, so that the pipe expanding cone is small in abrasion and uniform in abrasion, and the pipe expanding quality is guaranteed;
2. the key transmission is cylindrical pin transmission, so that the friction is smaller and the weight is lighter;
3. the elastic body enables the surface quality of the bell mouth of the copper pipe to be better;
5. the support ring extends into the middle hole of the worm wheel, so that the whole structure is more compact.
Description of the drawings:
fig. 1 is a partial structural schematic diagram of the present invention;
fig. 2 is a transverse sectional view of the present invention.
The specific implementation mode is as follows:
the technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b):
as shown in fig. 1 and fig. 2, the utility model discloses an expander structure for improving the quality of an expander bell mouth, including expander body 1 and chuck body 2 rotatably connected to expander body 1, expander body 1 opposite to chuck body 2 is opened with mandrel receiving cavity 3, rotatable sliding connection is connected with mandrel 4 in mandrel receiving cavity 3, the inside end of mandrel 4 is connected with the inner ring surface of worm wheel 16 of worm gear mechanism through two flat keys 5, flat key 5 is a cylindrical pin, and the line of two flat keys 5 passes through the axis of mandrel 4, making it evenly distributed in the circumferential direction, worm gear mechanism is electrically connected with motor 18 again, the outside end of mandrel 4 has expander cone 6 that can extend to outside mandrel receiving cavity 3, the outer end surface of mandrel 4 corresponding to expander cone 6 is opened with cone locating hole 12, 8 included angle is formed between the axis of cone locating hole 12 and the axis of mandrel 4, a cone bearing 13 is embedded and fixed in the cone positioning hole 12, and the pipe expanding cone 6 is rotatably connected in the cone positioning hole 12 through the cone bearing 13. The inner side end of the mandrel 4 forms a circular elastomer accommodating cavity 7, the open end of the elastomer accommodating cavity 7 faces inwards, the flat key 5 extends into the elastomer accommodating cavity 7, an elastomer 8 is clamped between the bottom surface of the elastomer accommodating cavity 7 and the flat key 5, the elastomer 8 is an annular rubber part, a guide screw 9 is coaxially inserted and fixed on the pipe expander body 1 opposite to the chuck body 2, the inner side end of the guide screw 9 extends into the elastomer accommodating cavity 7, in order to reduce the weight of the whole machine under the condition of ensuring the strength, the mandrel 4 is made of plastic materials, a metal transmission nut 10 is screwed outside the inner side end of the guide screw 9, an axial open slot 11 is arranged at the outer side end of the transmission nut 10, the inner side end of the flat key 5 is mutually matched and inserted in the axial open slot 11, and the flat key 5 can axially slide in the axial open slot 11, so that the inner end face of the transmission nut 10 is arranged on the end face of the elastomer 8, the outer diameter of the guide screw 9 is smaller than the middle hole of the elastic body 8, and the inner side end of the guide screw 9 extends into the middle hole of the elastic body 8 during pipe expanding processing. A mandrel bearing 14 is coaxially embedded and fixed in the expander body 1 corresponding to the outer side end of the mandrel 4, a support ring 15 is inserted in a middle hole of the mandrel bearing 14 in a matching manner, the support ring 15 is rotatably and slidably connected with the mandrel 4, the inner end of the support ring 15 extends into a middle hole of a worm wheel 16 and is tightly matched and fixed with the worm wheel 16, namely, the support ring 15 is embedded and fixed in a middle hole groove of the worm wheel 16.
When the pipe expander is used, the motor 18 positioned in the pipe expander body 1 drives the worm 17 to rotate through the coupler, the worm 17 drives the worm wheel 16 to rotate, the worm wheel 16 drives the mandrel 4 and the transmission nut 10 to synchronously outwards through the flat key 5, the pipe expanding cone 6 carries out spinning type pipe expanding processing on a copper pipe clamped on the chuck body 2, the elastomer 8 is compressed and deformed along the axial direction in the feeding processing process, because the pipe expanding cone 6 carries out pipe expanding processing through spinning type, the axial moving speed of the mandrel 4 is reduced through self deformation of the elastomer 8 during processing, the axial feeding deformation of a single circumference is reduced, and the circumferential shape of a bell mouth of the copper pipe tends to be uniform.
The specific embodiments described herein are merely illustrative of the principles of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. The utility model provides an expander structure for improving expander horn mouth quality, includes expander body (1) and rotates chuck body (2) of connecting on expander body (1), its characterized in that: the pipe expander comprises a pipe expander body (1) and a clamping head body (2), wherein the pipe expander body (1) opposite to the clamping head body is provided with a mandrel containing cavity (3), the mandrel (4) is connected with a worm gear mechanism in the mandrel containing cavity (3) in a sliding mode, the mandrel (4) is connected with the worm gear mechanism through a flat key (5) capable of sliding axially in a key mode, the outer side end of the mandrel (4) is provided with a pipe expanding cone (6) which can extend out of the mandrel containing cavity (3) and form an included angle with the axis of the mandrel (4), the inner side end of the mandrel (4) forms an elastic body containing cavity (7), the flat key (5) extends into the elastic body containing cavity (7), an elastic body (8) is clamped between the bottom surface of the elastic body containing cavity (7) and the flat.
2. The expander structure for improving the quality of an expander flare according to claim 1, wherein: a guide screw (9) is fixed on the pipe expander body (1) opposite to the chuck body (2), the inner side end of the guide screw (9) extends into the elastomer accommodating cavity (7), a transmission nut (10) is screwed outside the inner side end of the guide screw (9), an axial open slot (11) is formed in the outer side end of the transmission nut (10), and the inner side ends of the flat keys (5) are mutually matched and inserted in the axial open slot (11).
3. The expander structure for improving the quality of an expander flare according to claim 2, wherein: the elastic body (8) is an annular rubber piece, and the inner side end of the guide screw rod (9) extends into a middle hole of the elastic body (8).
4. An expander structure for improving the quality of an expander flare according to claim 1, 2 or 3, wherein: the outer end face of the mandrel (4) is provided with a cone positioning hole (12), an included angle is formed between the axis of the cone positioning hole (12) and the axis of the mandrel (4), and the pipe expanding cone (6) is rotatably connected in the cone positioning hole (12) through a cone bearing (13).
5. An expander structure for improving the quality of an expander flare according to claim 1, 2 or 3, wherein: a mandrel bearing (14) is embedded in the pipe expander body (1) corresponding to the outer side end of the mandrel (4), a support ring (15) is arranged between a middle hole of the mandrel bearing (14) and the outer annular surface of the mandrel (4), and the inner end of the support ring (15) extends into a middle hole of a worm wheel (16) on the worm and gear mechanism and is tightly matched with the worm wheel (16).
6. An expander structure for improving the quality of an expander flare according to claim 1, 2 or 3, wherein: the flat key (5) is a cylindrical pin.
7. An expander structure for improving the quality of an expander flare according to claim 1, 2 or 3, wherein: the mandrel (4) is connected with the worm gear mechanism at least through two flat keys (5), and the flat keys (5) are uniformly distributed in the circumferential direction of the mandrel (4).
CN201920402356.6U 2019-03-27 2019-03-27 Tube expander structure for improving quality of tube expander bell mouth Active CN209969403U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920402356.6U CN209969403U (en) 2019-03-27 2019-03-27 Tube expander structure for improving quality of tube expander bell mouth

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920402356.6U CN209969403U (en) 2019-03-27 2019-03-27 Tube expander structure for improving quality of tube expander bell mouth
PCT/CN2020/080586 WO2020192610A1 (en) 2019-03-27 2020-03-23 Electric pipe expander

Publications (1)

Publication Number Publication Date
CN209969403U true CN209969403U (en) 2020-01-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111659810A (en) * 2020-06-11 2020-09-15 中国航发航空科技股份有限公司 Aeroengine pipe machine-shaping device
WO2020192610A1 (en) * 2019-03-27 2020-10-01 蒋友荣 Electric pipe expander

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020192610A1 (en) * 2019-03-27 2020-10-01 蒋友荣 Electric pipe expander
CN111659810A (en) * 2020-06-11 2020-09-15 中国航发航空科技股份有限公司 Aeroengine pipe machine-shaping device

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